JP5448914B2 - Secondary battery module diagnostic device - Google Patents

Description

  The present invention relates to a diagnostic apparatus for a secondary battery module including a secondary battery and its control circuit.

  Examples of secondary battery module diagnostic devices include those described in Patent Literatures 1 and 2 below.

  In each of the diagnostic systems described in Patent Documents 1 and 2, the control circuit detects the internal resistance of the secondary battery, and evaluates the deterioration state, capacity, etc. of the secondary battery based on the detection result. It is.

JP 2009-58518 A JP 2007-108063 A

  However, in the technologies described in Patent Documents 1 and 2, even if the battery is normal, the control circuit itself is abnormal, so that the battery is abnormal, or the control circuit has an adverse effect on the battery cell. Therefore, even when the battery becomes abnormal, the battery may be replaced.

  In this case, in general, after replacing the battery, use a measuring instrument such as a tester to measure multiple state values such as the voltage between terminals and can voltage for the replaced battery, and check for battery abnormalities. To do. In this measurement, for each state value, the target state value is measured by bringing a tester probe into contact with a position suitable for measurement of the target state value. When it is confirmed that there is no abnormality in each state value or that there is no abnormality in the evaluation value obtained based on each state value, it is determined that the control circuit is abnormal, and the control circuit is replaced.

  In addition, when the battery is evaluated as abnormal by the control circuit, the above state values are measured with respect to the battery before replacement using a measuring instrument such as a tester without immediately replacing the battery. When it is confirmed that there is no abnormality or that there is no abnormality in the evaluation value obtained based on each state value, it is determined that the control circuit is abnormal, and the control circuit is replaced.

  That is, in the techniques described in Patent Documents 1 and 2, when data indicating abnormality of the secondary battery is output from the control circuit, it takes time to diagnose the secondary battery module including the secondary battery. There is a problem.

  Therefore, the present invention focuses on the problems of the prior art as described above, and an object of the present invention is to provide a diagnostic apparatus for a secondary battery module that can reduce the trouble of diagnosing the secondary battery module.

An invention relating to a diagnostic apparatus for a secondary battery module for solving the above problems,
A secondary battery comprising: a secondary battery; a control circuit that obtains a state value of the secondary battery and outputs the state value; and a control-side connector for connecting the control circuit and an external device In the module diagnostic device,
A measuring instrument having a probe used to measure the state value of the secondary battery, or a basic state value necessary for obtaining the state value, and the state value measured by the measuring instrument or A diagnostic device for diagnosing the secondary battery based on the basic state value,
The measuring device is connected to the diagnostic device and covers the diagnostic side connector connected to the control side connector and the upper surface side where the electrode terminal of the secondary battery is provided, and the state value or the A lid that holds the diagnostic connector at a position where the diagnostic connector can be connected to the control connector while holding the probe at a position where a basic state value can be measured;
The diagnostic device receives the state value or the basic state value measured by the measuring device, and receives the state value from the control circuit via the control-side connector and the diagnosis-side connector; The state value from the measuring instrument or the state value obtained from the basic state value is compared with the state value from the control circuit to determine whether or not both state values are within the same range. The state value obtained from the state value from the measuring instrument or the basic state value when the state value is determined to be within the same range by the comparison unit and the control unit, and the control circuit An abnormality determination unit that determines whether or not the secondary battery is normal based on at least one of the state values from the output, and a determination result in the abnormality determination unit, By the comparison unit, the The state value is determined to be within the same range, characterized and an output section, to have the output to the effect that the control circuit is normal.

  In the present invention, when the cover plate is disposed on the upper surface side of the secondary battery, the probe is positioned at a position where the target state value can be measured, and the diagnosis side connector is connected to the control side connector. For this reason, the trouble of arrangement | positioning of a probe and the connection of a connector can be saved, and the effort of the diagnosis of a secondary battery module can be reduced.

  Further, according to the present invention, the presence / absence of abnormality of the secondary battery is output, and when the control circuit is normal, the fact that the control circuit is normal is output. For this reason, it is not necessary to separately diagnose whether the control circuit is normal, and it is possible to save the trouble of diagnosis from this point.

In addition, the secondary battery module diagnostic device includes:
The probe has a contact probe that contacts a part of the upper surface side of the secondary battery, and the contact probe contacts a fixed part fixed to the lid plate and the part of the secondary battery. A contact pin, and an elastic member attached to the fixing portion and pressing the contact pin against the partial side of the secondary battery when the cover plate is disposed on the upper surface side of the secondary battery. There may be.

  Thus, when the contact probe has an elastic member, the contact pressure between the contact pin of the contact probe and the contact object can be easily set to the target contact pressure.

  Further, in the diagnostic device for the secondary battery module, the lid plate holds the diagnostic side connector movably in the insertion / removal direction with respect to the control side connector when the lid plate is arranged on the upper surface side of the secondary battery. It is preferable to have a connector holding part.

  In this way, the cover plate has a connector holding member that holds the diagnostic connector in a movable manner, so that even if the probe has a contact probe that contacts a part of the upper surface side of the secondary battery, the diagnosis can be performed. The connection between the side connector and the control side connector and the contact between the contact probe and the contact object can be reliably executed.

  Further, the secondary battery module includes a signal line for connecting the control circuit and the secondary battery, and disconnection and connection of the signal line so that the control circuit acquires the state value of the secondary battery. The diagnostic device disconnects the connection switch of the secondary battery module when the abnormality determination unit determines that the two state values are not within the same range. It is preferable to include a connection control unit for bringing the state into a state.

  Thus, by providing the connection control unit, even if the control circuit is abnormal and the secondary battery is abnormal due to this abnormality, the connection control unit can cause the connection switch to be disconnected. Thus, since the connection between the control circuit and the secondary battery is disconnected, adverse effects on the secondary battery from the control circuit can be avoided. For this reason, in a state where the connection between the control circuit and the secondary battery is disconnected, the state quantity of the secondary battery is measured by a measuring instrument, and the presence or absence of abnormality of the secondary battery is determined using this state quantity. Thus, the determination can be made accurately.

  Moreover, in the diagnostic apparatus for the secondary battery module, the receiving unit of the diagnostic device receives the state value from the measuring device after the connection switch of the secondary battery module is disconnected by the connection control unit. Alternatively, the abnormality determination unit of the diagnostic device receives the basic state, and the state value obtained from the state value or the basic state value from the measuring device after the connection switch is turned off, When determining whether or not the secondary battery is abnormal, and determining that the secondary battery is normal, the control unit notifies the output unit that the control circuit is abnormal, and the output unit includes the abnormality determination unit. Determines that there is no abnormality in the secondary battery and notifies that the control circuit is abnormal, outputs that the secondary battery is normal and that the control circuit is abnormal Is preferable.

  In this way, by outputting an abnormality of the control circuit, even if the secondary battery is normal but the control circuit itself is abnormal and the battery is abnormal, the secondary battery is unnecessary. The trouble of replacing the battery can be saved.

  Further, when the secondary battery module has the connection switch, the secondary battery module has a switch-side connector for giving a control signal from the outside to the connection switch, and the measuring instrument is connected to the diagnostic instrument. And having a second diagnosis side connector connected to the switch side connector, wherein the cover plate holds the probe at a position where the state value or the basic state value can be measured, and the second diagnosis It is preferable to hold | maintain this 2nd diagnostic side connector in the position which a side connector can connect to the said switch side connector.

  Thus, when the second diagnosis side connector connected to the switch side connector is provided on the cover plate, the second diagnosis side connector is connected to the switch side connector by arranging the cover plate on the upper surface side of the secondary battery. Therefore, the trouble of connecting the connector can be saved.

Moreover, in the diagnostic apparatus for the secondary battery module, the measuring device includes:
As the probe, a positive-side current supply terminal and a positive-electrode-side potential measurement probe that are in contact with the positive-electrode terminal of the secondary battery, a negative-electrode current supply terminal and a negative-electrode-side potential measurement probe that are in contact with the negative electrode terminal of the secondary battery, A charge / discharge current generating unit that generates a charge / discharge current according to an instruction from the diagnostic device, and supplies the charge / discharge current to the secondary battery via the positive-side current supply end and the negative-side current supply end; A current measuring unit that measures the current flowing through the side current supply end or the negative side current supply end, and a voltage measuring unit that measures the potential applied to the positive potential measuring probe and the potential applied to the negative potential measuring probe. Have
The abnormality determination unit of the diagnostic device is configured such that when the charge / discharge current generation unit generates the charge / discharge current, a potential applied to the positive potential measurement probe and a potential applied to the negative potential measurement probe A phase difference between the voltage that is the difference and the current measured by the current measuring unit is obtained, and when the phase difference exceeds a threshold for the phase difference, it is determined that the secondary battery is abnormal. There may be.

  In this case, the measuring device has a temperature detection probe for detecting the temperature in the installation environment of the secondary battery as the probe, and the diagnostic device uses the signal from the temperature detection probe to detect the secondary battery. A temperature measuring unit for measuring a temperature in an installation environment of the battery, wherein the abnormality determination unit of the diagnostic device is based on the phase difference when the charge / discharge current generating unit generates the charge / discharge current; When making an abnormality determination, it is preferable that a threshold corresponding to the temperature measured by the temperature measuring unit is determined as the threshold for the phase difference.

  Further, the abnormality determination unit is configured to determine whether the potential applied to the positive potential measuring probe and the potential applied to the negative potential measuring probe measured by the voltage measuring unit when no current flows through the secondary battery. It is preferable that a charging rate of the secondary battery is obtained using a voltage that is a difference, and a threshold value corresponding to the charging rate is determined as the threshold value for the phase difference.

  As described above, the phase difference between the battery current and the battery voltage when the charge / discharge current is passed through the secondary battery is obtained, and the presence or absence of abnormality of the secondary battery is determined according to this phase difference. It is possible to determine whether or not the secondary battery has a deterioration abnormality.

Moreover, in the diagnostic apparatus for the secondary battery module, the measuring device includes:
As the probe, a positive-side current supply terminal and a positive-electrode-side potential measurement probe that are in contact with the positive-electrode terminal of the secondary battery, a negative-electrode current supply terminal and a negative-electrode-side potential measurement probe that are in contact with the negative electrode terminal of the secondary battery, A charge / discharge current generating unit that generates a charge / discharge current according to an instruction from the diagnostic device, and supplies the charge / discharge current to the secondary battery via the positive-side current supply end and the negative-side current supply end; A voltage measuring unit for measuring a potential applied to the side potential measuring probe and a potential applied to the negative electrode side potential measuring probe,
The abnormality determination unit of the diagnostic device is configured such that when the charge / discharge current generation unit generates the charge / discharge current, a potential applied to the positive potential measurement probe and a potential applied to the negative potential measurement probe A voltage fluctuation range that is a difference may be obtained, and when the fluctuation range exceeds a threshold value for the fluctuation range, it is determined that the secondary battery is abnormal.

  In this case, the measuring device has a temperature detection probe for detecting the temperature in the installation environment of the secondary battery as the probe, and the diagnostic device uses the signal from the temperature detection probe to detect the secondary battery. A temperature measuring unit for measuring a temperature in an installation environment of the battery, and the abnormality determining unit of the diagnostic device includes a fluctuation range of the voltage when the charging / discharging current generating unit generates the charging / discharging current. It is preferable that a threshold value corresponding to the temperature measured by the temperature measuring unit is determined as the threshold value for the fluctuation range when an abnormality is determined based on.

  Further, the abnormality determination unit is configured to determine whether the potential applied to the positive potential measuring probe and the potential applied to the negative potential measuring probe measured by the voltage measuring unit when no current flows through the secondary battery. It is preferable that a charging rate of the secondary battery is obtained using a voltage that is a difference, and a threshold value corresponding to the charging rate is determined as the threshold value for the fluctuation range.

  As described above, the phase difference between the battery current and the battery voltage when the charge / discharge current is passed through the secondary battery is obtained, and the presence or absence of abnormality of the secondary battery is determined according to this phase difference. It is possible to determine whether or not the secondary battery has a deterioration abnormality.

Further, in the diagnostic device for the secondary battery module, when the positive electrode side potential measurement probe, the positive electrode side contact end, the negative electrode side potential measurement probe, the negative electrode side contact end,
The positive electrode side potential measurement probe has a positive electrode side contact pin that contacts a positive electrode terminal of the secondary battery, and the positive electrode side current supply end is at a plurality of positions symmetrical about the positive electrode side contact pin. A positive electrode side contact end in contact with a terminal, the positive electrode side current supply end and the positive electrode side potential measurement probe are unitized to form a positive electrode side probe unit;
The positive electrode side probe unit has the positive electrode side current supply end and the positive electrode side electric potential measuring probe, and is attached to the positive electrode side fixing portion fixed to the lid plate, the positive electrode side fixing portion, and the lid plate An elastic member that presses the positive electrode side contact pin of the positive electrode side potential measurement probe against the positive electrode terminal of the secondary battery when arranged on the upper surface side of the secondary battery; The positive electrode side contact end is attached to the positive electrode side fixing portion so as to contact the positive electrode terminal when the cover plate is arranged on the upper surface side of the secondary battery,
The negative electrode side potential measurement probe has a negative electrode side contact pin that contacts a negative electrode terminal of the secondary battery, and the negative electrode side current supply end has the negative electrode at a plurality of positions symmetrical about the negative electrode side contact pin. The negative electrode side contact end has a negative electrode side contact end, and the negative electrode side current supply end and the negative electrode side potential measuring probe are unitized to form a negative electrode side probe unit, and the negative electrode side probe unit includes the negative electrode side A negative electrode side fixing portion fixed to the lid plate, and attached to the negative electrode side fixing portion, and the lid plate is disposed on the upper surface side of the secondary battery. An elastic member that presses the negative electrode side contact pin of the negative electrode side potential measuring probe against the negative electrode terminal of the secondary battery, and the negative electrode side contact end of the negative electrode side current supply end is the lid plate The upper surface of the secondary battery To contact the negative terminal when arranged in the mounted on the negative electrode side fixing portion, it is preferable.

  As described above, by configuring the diagnostic device, the contact pressure between the contact pin of each potential measurement probe and the contact target can be easily set to the target contact pressure. Furthermore, since the contact pin is positioned at the center of the annular contact end that supplies current, an accurate terminal potential can be measured.

  Further, in the above diagnostic apparatus for a secondary battery module, when the probe has a contact probe that contacts a part of the upper surface side of the secondary battery, the lid plate, the probe, and the diagnostic side connector The combined weight of the contact pressure between the contact probe and the part on the upper surface side of the secondary battery is the target contact pressure when the cover plate is disposed on the upper surface side of the secondary battery. It is preferable that the weight becomes.

  By configuring the diagnostic apparatus as described above, the contact pressure between the contact probe and the contact target can be set to the target contact pressure.

  In the present invention, when the cover plate is arranged on the upper surface side of the secondary battery, the probe is positioned at a position where the target state value can be measured, and the diagnosis side connector is connected to the control side connector. Can be saved. Further, the presence / absence of abnormality of the secondary battery is output, and when the control circuit is normal, the fact that the control circuit is normal is output. For this reason, according to this invention, the effort of a diagnosis can be reduced.

It is explanatory drawing which shows the structure of the secondary battery module in one Embodiment which concerns on this invention, and its diagnostic apparatus. It is a perspective view of a lid plate and a probe of a diagnostic device in one embodiment concerning the present invention. It is explanatory drawing which shows the structure of the measuring device of the diagnostic apparatus in one Embodiment which concerns on this invention. It is sectional drawing (before contacting a positive electrode terminal) of the 1st positive electrode probe in one Embodiment which concerns on this invention. It is sectional drawing (at the time of a positive electrode terminal contact) of the 1st positive electrode probe in one Embodiment which concerns on this invention. It is explanatory drawing which shows the structure of the monitor (diagnosis device) of the diagnostic apparatus in one Embodiment which concerns on this invention. It is explanatory drawing which shows the data structure of the deterioration threshold value table in one Embodiment which concerns on this invention. It is a graph which shows the current waveform and voltage waveform at the time of supplying charging / discharging electric current to a secondary battery. It is a top view of a secondary battery module. It is a flowchart (the 1) which shows operation | movement of the monitor in one Embodiment which concerns on this invention. It is a flowchart (the 2) which shows operation | movement of the monitor in one Embodiment which concerns on this invention. It is a flowchart which shows operation | movement of the measuring device in one Embodiment which concerns on this invention.

  Hereinafter, an embodiment of a diagnostic apparatus for a secondary battery module according to the present invention will be described.

  First, the secondary battery module diagnosed by the diagnostic device of the present embodiment will be described with reference to FIGS. 1 and 9.

  The secondary battery module 10 includes four secondary batteries 20, a CMU (Cell Monitoring Unit, control circuit) 30 that controls each secondary battery according to various state values of the secondary batteries 20, and And a case 11 for storage. The case 11 has a case main body 12 in which a concave portion for receiving the secondary battery 20 and the CMU 30 is formed, and a lid (not shown) that closes the concave opening of the case main body 12.

  The secondary battery 20 has a rectangular parallelepiped shape, and the positive electrode terminal 21 and the negative electrode terminal 22 are exposed from one surface thereof. The secondary battery 20 is housed in the case 11 with the surface where the positive electrode terminal 21 and the negative electrode terminal 22 are exposed as the upper surface.

  The CMU 30 is connected to each secondary battery 20 by a signal line 40, and acquires various state values for each secondary battery 20 from the signal line 40, and a plurality of state values are obtained according to the various state values. The charge / discharge balance of the secondary battery 20 is controlled. Each signal line 40 is provided with a connection switch 41 that disconnects the connection between the CMU 30 and the secondary battery 20. Each connection switch 41 is connected to a switch-side connector 42 to which a control signal for cutting / connecting the signal line 40 is input. The switch-side connector 42 is attached to the case body 12 or the CMU 30 so as not to move with respect to the case body 12 or the CMU 30.

  In the present embodiment, the CMU 30 acquires a terminal voltage, a can voltage, an internal resistance, a battery temperature, and the like as state values of the secondary battery 20. The can voltage is a voltage between a cell that is an outer covering of the secondary battery 20 and the positive electrode terminal 21.

  The CMU 30 is connected to a CMU side connector 32 (control side connector) for communication connection with the outside. The CMU 30 sends the acquired various state values to the outside via the CMU side connector 32.

  Next, the diagnostic apparatus of this embodiment will be described.

  As shown in FIG. 1, the diagnostic device of the present embodiment includes a measuring device 100 that measures various state values for each secondary battery 20, and each secondary based on various state values measured by the measuring device 100. And a monitor 200 as a diagnostic device for diagnosing the state of the battery 20.

  The measuring instrument 100 includes a plurality of probes 110 for measuring various state values of each secondary battery 20, a first diagnosis-side connector 120 connected to the CMU-side connector 32, and a first connector connected to the switch-side connector 42. It has a two-diagnosis side connector 140, a cover plate 130 that holds these, and a module measurement circuit 150 that measures various state values using a plurality of probes 110 for each secondary battery 20.

  As shown in FIGS. 1 and 2, the lid plate 130 is provided on a rectangular lid body plate 131 corresponding to the rectangular opening of the case body 12 and on the outer periphery of the lid body plate 131. And a side plate 132 that contacts the opening edge. The lid body plate 131 is provided with the plurality of probes 110 and the first and second diagnosis side connectors 120 and 140 described above.

  As a probe 110 for measuring various state values of the secondary battery 20, as shown in FIG. 3, a temperature measurement probe 110a for measuring the temperature in the installation environment of the secondary battery 20, and the secondary battery 20 A can potential measurement probe 110b for measuring the can potential (cell potential) of the first electrode, a first positive electrode probe 110c for measuring the potential of the positive electrode terminal 21 when the charge / discharge current is generated, and the generation of the charge / discharge current. The first negative electrode probe 110d for measuring the potential of the negative electrode terminal 22 at the time, and the second positive electrode probe 110e for measuring the potential of the positive electrode terminal 21 in order to grasp the internal resistance of the secondary battery 20, There is a second negative electrode probe 110 f for measuring the potential of the negative electrode terminal 22 in order to grasp the internal resistance of the secondary battery 20.

  Each probe 110 is provided at a position on the cover plate 130 where the target state value required for each probe 110 can be detected when the cover plate 130 is placed on the case body 12 of the secondary battery module 10. ing. Specifically, the temperature measurement probe 110 a is provided at a position on the lid plate 130 that may be present above the secondary battery 20 when the lid plate 130 is placed on the case body 12 of the secondary battery module 10. Yes. Further, the can potential measurement probe 110b is provided at a position on the lid plate 130 that can contact the cell of the secondary battery 20. The first and second positive electrode probes 110c and 110e are provided at positions on the cover plate 130 that can contact the positive electrode terminal 21 of the secondary battery 20, and the first and second negative electrode probes 110e and 110f are secondary electrodes. It is provided at a position on the lid plate 130 that can contact the negative electrode terminal 22 of the battery 20.

  Further, as shown in FIG. 6, the first diagnosis-side connector 120 has a position on the cover plate 130 that can be connected to the CMU-side connector 32 when the cover plate 130 is placed on the case body 12 of the secondary battery module 10. Is provided. The second diagnosis side connector 140 is provided at a position on the lid plate 130 that can be connected to the switch side connector 42 when the lid plate 130 is placed on the case body 12 of the secondary battery module 10.

  As shown in FIG. 3, the module measurement circuit 150 includes a cell measurement circuit 160 that exists for each secondary battery 20, a CPU 170 that executes various processes, a memory 180 that stores various data, and a monitor 200. And an interface 190 for communicating with each other, and a power supply circuit 195 for supplying power to them. Each cell measurement circuit 160 is set with an ID (identifier). Here, ID “1” is set for the cell measurement circuit 160 that measures the state quantity of the secondary battery 20 with ID “1”. , ID “2” is set for the cell measurement circuit 160 that measures the state quantity of the secondary battery 20 with ID “2”, and the cell measurement circuit 160 that measures the state quantity of the secondary battery 20 with ID “3”. Is set to ID “3”, and ID “4” is set to the cell measurement circuit 160 that measures the state quantity of the secondary battery 20 with ID “4”.

  The CPU 170 functionally includes a communication control unit 171 for communicating with the monitor 200 and a cell measurement control unit 172 for controlling the operation of each cell measurement circuit 160. The memory 180 stores a program for executing each of the above functions, and the CPU 170 executes each program so that each functional unit functions.

  Each cell measurement circuit 160 converts a temperature measurement circuit 161, a can potential measurement circuit 162, a charge / discharge current / voltage measurement circuit 163, an internal resistance measurement circuit 166, and an analog signal from these circuits into a digital signal. AD converter 169.

  The temperature measurement circuit 161 is connected to the temperature measurement probe 110 a and measures the temperature of the secondary battery 20 in the installation environment. The can potential measuring circuit 162 is connected to the can potential measuring probe 110b and measures the cell potential of the secondary battery 20.

  The charge / discharge current / voltage measurement circuit 163 includes a current whose potential changes sinusoidally, that is, a charge / discharge current generation circuit 164 that generates a charge / discharge current, a current flowing through the secondary battery 20 when the charge / discharge current is generated, And a current / voltage measurement circuit 165 for measuring the voltage applied to the secondary battery 20. The charge / discharge current generation circuit 164 and the current / voltage measurement circuit 165 are both connected to the first positive electrode probe 110c and the first negative electrode probe 110d. The charging / discharging current generation circuit 164 is configured such that the first positive electrode probe 110c is in contact with the positive electrode terminal 21 of the secondary battery 20 and the first negative electrode probe 110d is in contact with the negative electrode terminal 22 of the secondary battery 20. A closed current circuit is formed between the battery 20 and the charging / discharging current is supplied to the secondary battery 20. In addition, the current / voltage measurement circuit 165 has a positive terminal of the secondary battery 20 that is in contact with the first positive electrode probe 110c when the charge / discharge current generation circuit 164 supplies a charge / discharge current to the secondary battery 20. 21 and the potential of the negative electrode terminal 22 of the secondary battery 20 in contact with the first negative electrode clove 110d are measured. Furthermore, the current / voltage measurement circuit 165 measures the current flowing in the closed current circuit when the charge / discharge current generation circuit 164 supplies the charge / discharge current to the secondary battery 20.

  The internal resistance measurement circuit 166 includes a constant current generation circuit 167 that generates a constant current, a current / voltage measurement circuit 168 that measures a current flowing through the secondary battery 20 and a voltage applied to the secondary battery 20 when the constant current is generated, have. The constant current generation circuit 167 and the current / voltage measurement circuit 168 are both connected to the second positive electrode probe 110e and the second negative electrode probe 110f. The constant current generation circuit 167 is configured such that the second positive electrode probe 110e is in contact with the positive electrode terminal 21 of the secondary battery 20 and the second negative electrode probe 110f is in contact with the negative electrode terminal 22 of the secondary battery 20, thereby A closed current circuit is formed between the secondary battery 20 and a constant current. The current / voltage measurement circuit 168 is connected to the positive terminal 21 of the secondary battery 20 in contact with the second positive electrode probe 110e when the constant current generation circuit 167 supplies a constant current to the secondary battery 20. The electric potential and the electric potential of the negative electrode terminal 22 of the secondary battery 20 in contact with the second negative electrode clove 110f are measured. Furthermore, the current / voltage measurement circuit 168 measures the current flowing through the closed current circuit when the constant current generation circuit 167 supplies a constant current to the secondary battery 20.

  As shown in FIG. 4, the first positive electrode probe 110 c is connected to the module measurement circuit 150 via a cable 117. The first positive electrode probe 110 c is disposed at the center of the annular current supply end (positive electrode side contact end) 111 that contacts the positive electrode terminal 21 of the secondary battery 20 and the annular current supply end 111, and contacts the positive electrode terminal 21. A potential measurement pin (positive electrode side contact pin) 112 to be fixed, a fixing portion 113 fixed to the cover plate 130, and a spring 114 that presses the potential measurement pin 112 against the positive electrode terminal 21. For the convenience of the following description, when the vertically downward direction is the (+) Z direction, the vertically upward direction is the (−) Z direction, and the cover plate 130 is placed on the case body 12, (+ ) The cover plate 130 is moved in the Z direction.

  The annular current supply end 111 is fixed to the fixed portion 113, and the potential measuring pin 112 is attached to the fixed portion 113 so as to be movable in the Z direction at the center position of the annular current supply end 111. One end of the spring 114 is attached to the positive terminal 21, and the other end is attached to the fixed portion 113. The potential measurement pin 112 is attached to the fixed portion 113 by the spring 114.

  The potential measurement pin 112 has a tip that is closer to the positive electrode terminal 21 than the tip of the current supply end 111 when neither the potential measurement pin 112 nor the current supply end 111 is in contact with the positive electrode terminal 21 of the secondary battery 20. In other words, it protrudes to the (+) Z side. For this reason, in the process in which the cover plate 130 provided with the first positive electrode probe 110 c is disposed on the upper surface of the secondary battery 20, first, the potential measuring pin 112 of the first positive electrode probe 110 c contacts the positive electrode terminal 21. . When the potential measuring pin 112 comes into contact with the positive electrode terminal 21, the spring 114 contracts and moves in a direction relatively away from the positive electrode terminal 21 with respect to the fixed portion 113, that is, (−) Z side. However, at this time, the potential measurement pin 112 is not moved away from the positive electrode terminal 21, and is kept in contact with the positive electrode terminal 21. When the potential measuring pin 112 moves relatively to the (−) Z side with respect to the fixed portion 113 and the tip of the potential measuring pin 112 does not protrude from the tip of the current supply end 111, as shown in FIG. The supply end 111 is in contact with the positive electrode terminal 21. At this time, the potential measuring pin 112 receives a pressing force in the (+) Z direction against the positive electrode terminal 21 from the contracted spring 114. For this reason, a predetermined contact pressure is generated between the potential measuring pin 112 and the positive terminal 21.

  At this time, a predetermined contact pressure is also generated between the current supply end 111 of the first positive electrode probe 110 c and the positive electrode terminal 21. In this embodiment, the total weight of the cover plate 130, all the probes 110 and all the connectors 120, 140 provided on the cover plate 130 is between the current supply end 111 of the first positive electrode probe 110c and the positive terminal 21. This is because the weight is such that a predetermined contact pressure can be generated. Here, the predetermined contact pressure is a contact pressure when the contact resistance between the current supply end 111 and the positive electrode terminal 21 becomes smaller than a predetermined value.

  As shown in FIG. 4, the current supply end 111 is electrically connected to the charge / discharge current generation circuit 164 through a conductive line 115. Further, the potential measuring pin 112 is electrically connected to the current / voltage measuring circuit 165 through the conductive wire 116. The conductive line 115 connected to the current supply end 111 is also connected to the current / voltage measurement circuit 165 so that the current / voltage measurement circuit 165 measures the current flowing through the current supply end 111.

  For this reason, the current supply end 111 also serves as a probe for measuring the current flowing through the secondary battery 20 in contact with the current supply end 111. Further, the potential measuring pin 112 exclusively serves as a probe for measuring the terminal potential of the secondary battery 20. Therefore, it can be said that the first positive electrode probe 110c is a unit in which a probe for measuring the current flowing through the secondary battery 20 and a probe for measuring the terminal potential of the secondary battery 20 are unitized.

  The conductive wire 115 connected to the current supply end 111 and the conductive wire 116 connected to the potential measurement pin 112 are accommodated in the cable 117 that connects the first positive electrode probe 110c and the module measurement circuit 150. It has been.

  Although the configuration of the first positive electrode probe 110c has been described above, the first negative electrode probe 110d, the second positive electrode probe 110e, and the second negative electrode probe 110f have the same structure as the first positive electrode probe 110c. However, the current supply ends of the second positive electrode probe 110e and the second negative electrode probe 110f are electrically connected to the constant current generation circuit 167 of the internal resistance measurement circuit 166 by conductive wires, and the second positive electrode probe 110e and the second negative electrode probe 110f The potential measurement pin of the two negative electrode probe 110f is connected to the current / voltage measurement circuit 168 of the internal resistance measurement circuit 166 by a conductive wire.

  The can potential measurement probe 110b has the same structure as the first positive electrode probe 110c. However, the potential measuring pin of the can potential measuring probe 110b is connected to the can potential measuring circuit 162 by a conductive wire. Further, since it is not necessary to supply a current to the secondary battery 20 from the outside during the can potential measurement, the current supply terminal of the can potential measurement probe 110b is connected to any circuit in the cell measurement circuit 160. Not. For this reason, the can potential measurement probe 110b essentially does not require the current supply end 111, but in this embodiment, the first positive electrode probe 110c, the first negative electrode probe 110d, and the second positive electrode probe, which are contact probes, are used. 110e, the second negative electrode probe 110f, and the can potential measurement probe 110b are made common to reduce the manufacturing cost.

  As shown in FIG. 6, the first and second diagnosis side connectors 120 and 140 are arranged so that the contact probes 110 b to 110 f are moved in the process of moving the lid 130 from the position directly above the case body 12 to the (+) Z side. Immediately before coming into contact with a contact object such as an electrode terminal or a cell, it is fixed to the cover plate 130 via a connector holding part 135 such as an elastic bush so that it can be connected to the CMU side connector 32 or the switch side connector 42. ing.

  After the first diagnosis side connector 120 and the CMU side connector 32 are connected and the second diagnosis side connector 140 and the switch side connector 42 are connected to the cover plate 130, the contact probes 110b to 110f contact the contact object. In other words, in other words, the cover plate 130 moves to the (+) Z side until the cover plate 130 is completely placed on the case body 12. For this reason, if the first diagnosis side connector 120 or the like is connected to the CMU side connector 32 or the like and then moves to the (+) Z side together with the cover plate 130, either connector is damaged or There is a risk of damage to the support part. Therefore, in the present embodiment, the first diagnosis side connector 120 and the like have elasticity so that they can move to the (=) Z side relative to the lid plate 130 even after being connected to the CMU side connector 32. It is fixed to the lid plate 130 via the connector holding part 135.

  The monitor (diagnostic device) 200 is a computer, and as shown in FIG. 6, a CPU 210 that performs various arithmetic processes, a memory 220 that becomes a work area of the CPU 210, an auxiliary storage device 230 such as a hard disk drive, and a keyboard And an input device 240 such as a mouse, a display device (output unit) 250, and an interface (reception unit) 250 for transmitting and receiving signals to and from the outside.

  The auxiliary storage device 230 stores a database 231 in which various threshold values for diagnosis are stored, and a diagnostic program 235 executed by the CPU.

  The CPU 210 functionally includes a measurement control unit 211 that controls the module measurement circuit 150, a comparison unit 212 that compares various state values measured by the measuring instrument 100 with various state values acquired by the CMU 30, and each state value. The abnormality determination unit 213 that determines whether or not the secondary battery 20 is abnormal based on the above, the display control unit 214 that controls the display content of the display device 250, and the connection between the CMU 30 and the secondary battery 20 A connection control unit 215 for controlling. Each of these functional units functions when the CPU 210 executes the diagnostic program 235 stored in the auxiliary storage device 230.

  As described above, the database 231 of the auxiliary storage device 230 stores various threshold values that serve as a basis for determining whether there is an abnormality. The threshold values stored in the database 231 include upper and lower threshold values for temperature, lower threshold values for can voltage, upper and lower threshold values for internal resistance, and threshold values for the degree of deterioration of the secondary battery 20.

  When the deterioration of the secondary battery 20 progresses, as shown in FIG. 8, the phase difference ΔP of the voltage waveform with respect to the current waveform when the charging / discharging current is applied to the secondary battery 20 increases, and the current fluctuation width is increased. The voltage fluctuation width ΔV also increases. Therefore, in the present embodiment, the threshold value ΔPs of the phase difference ΔP and the threshold value ΔVs of the voltage fluctuation range ΔV that the secondary battery 20 has deteriorated are determined and stored in the database 231.

  The phase difference ΔP and the voltage fluctuation range ΔV vary depending on the charging rate of the secondary battery 20 and the temperature of the secondary battery 20. For this reason, in this embodiment, as shown in FIG. 7, a deterioration threshold table is provided in the database 231, and the phase difference of each charge rate and temperature of the secondary battery 20 is stored in the deterioration threshold table 232. The threshold value ΔPs and the threshold value ΔVs of the voltage fluctuation range are stored.

  The module measurement circuit 150, the first diagnosis side connector 120, and the second diagnosis side connector 140 are connected to the interface 250 of the monitor 200 by cables.

Next, the operation of the diagnostic apparatus described above will be described.
First, when diagnosing the secondary battery module 10, a repairer who diagnoses the secondary battery module 10 and repairs it when there is a defect removes the lid of the secondary battery module 10 from the case body 12. Next, a repairer or the like places the lid plate 130 of the measuring instrument 100 on the case body 12 and arranges the lid plate 130 so as to cover the upper surface of the secondary battery 20.

  When the lid plate 130 of the measuring instrument 100 is arranged as described above, each probe 110 provided on the lid plate 130 is in a position where a target state value can be measured. Specifically, the temperature measurement probe 110a is positioned on the upper part of the secondary battery 20, the can potential measurement probe 110b is in contact with the cell of the secondary battery 20, and the first and second positive electrode probes 110c and 110e are connected to the secondary battery 20. The first and second negative electrode probes 110 d and 110 f are in contact with the negative electrode terminal 22 of the secondary battery 20. Further, the connectors 120 and 140 provided on the cover plate 130 are connected to the corresponding connectors 32 and 42.

  At this time, the potential measurement pin 112 (FIGS. 4 and 5) of the can potential measurement probe 110b, the first and second positive electrode probes 110e110e, and the first and second negative electrode probes is contacted with the contact object by the pressing force of the spring 114. The contact pressure between is a predetermined contact pressure. The first and second positive electrode probes 110e110e and the current supply ends 111 of the first and second negative electrode probes are connected to the contact object according to the weight of the cover plate 130 and each probe and each connector provided thereto. The contact pressure between is a predetermined contact pressure.

  Next, a repairer or the like activates the monitor 200 and operates the input device 240 of the monitor 200 to give an instruction to start diagnosis to the monitor 200. Hereinafter, the operation of the monitor 200 will be described with reference to the flowcharts shown in FIGS.

  When the measurement control unit 211 of the monitor 200 receives this diagnosis start instruction (S1), the interface (reception unit) 250 uses the CMU side connector 32 and the state value of the secondary battery 20 that the CMU 30 has already acquired. This is accepted via the first diagnosis side connector 120. Then, the measurement control unit 211 temporarily stores the state value of the secondary battery 20 on the memory 220 (S2). Here, the state values stored in the memory 220 are battery temperature, terminal voltage, can voltage, internal resistance, and the like.

  Next, the measurement control unit 211 of the monitor 200 instructs the module measurement circuit 150 of the measuring instrument 100 to perform measurement of various state values for each secondary battery 20, and the module measurement circuit 150 sets various state values. Measurement is executed (S3).

  Here, measurement processing of various state values by the module measurement circuit 150 will be described according to the flowchart shown in FIG.

  When receiving the measurement execution instruction from the monitor 200 (S30), the cell measurement control unit 172 of the module measurement circuit 150 first sets the ID of the cell measurement circuit 160 to be activated to “1” (S31).

  Next, the cell measurement control unit 172 activates the cell measurement circuit 160 having the ID set in step 31 (S32), and the temperature measurement circuit 161 in the cell measurement circuit 160 is connected to the temperature measurement circuit 161. The temperature measurement using the existing temperature measurement probe 110a is executed, and the temperature in the installation environment of the secondary battery 20 is acquired (S33).

  Next, the cell measurement control unit 172 is a positive electrode using the positive electrode probe 110c or 110e and the negative electrode probe 110d or 110f in the charge / discharge current / voltage measurement circuit 163 or the current / voltage measurement circuit 165 or 168 of the internal resistance measurement circuit 166. The potential and the negative electrode potential are measured to obtain the positive electrode potential and the negative electrode potential (S34).

  Next, the cell measurement control unit 172 generates a charge / discharge current from the charge / discharge current generation circuit 164 of the charge / discharge current / voltage measurement circuit 163, and the second measurement is performed via the first positive electrode probe 110c and the first negative electrode probe 110d. A charge / discharge current is passed through the secondary battery 20. The current / voltage measurement circuit 165 of the charge / discharge current / voltage measurement circuit 163 measures the current flowing through the secondary battery 20 and the potentials of the positive terminal 21 and the negative terminal 22 during the same predetermined period. The current of a predetermined period and the potentials of the positive terminal 21 and the negative terminal 22 in the same predetermined period are obtained (S35).

  Next, the cell measurement control unit 172 generates a constant current from the constant current generation circuit 167 of the internal resistance measurement circuit 166 and sets the secondary battery 20 through the second positive electrode probe 110e and the second negative electrode probe 110f. Apply current. Then, the current / voltage measurement circuit 168 of the internal resistance measurement circuit 166 performs the current measurement flowing in the secondary battery 20 and the potential measurement of the positive electrode terminal 21 and the negative electrode terminal 22, and flows into the secondary battery 20. The current and the potential of the positive terminal 21 and the negative terminal 22 are obtained (S36).

  Next, the communication control unit 171 of the module measurement circuit 150 transmits the state value obtained by the cell measurement control unit 172 in the above Step 33 to Step 36 to the monitor 200 together with the set ID (S37). .

  When the communication control unit 171 transmits the state value to the monitor 200, the cell measurement control unit 172 adds “1” to the setting ID and sets this as a new setting ID (S38). Then, the cell measurement control unit 172 determines whether or not the new setting ID is “5”, that is, whether or not the measurement of all the state values of the four secondary batteries 20 is completed (S39). ).

  When the cell measurement control unit 172 determines that the new setting ID is not “5”, the cell measurement control unit 172 returns to step 32 and activates the cell measurement circuit 160 with the new setting ID. In addition, when the cell measurement control unit 172 determines that the new setting ID is not “5”, the cell measurement control unit 172 notifies the communication control unit 171 that the measurement is completed, and transmits the fact to the monitor 200 (S40).

  Thus, the measurement processing of various state values by the module measurement circuit 150 ends.

  The operation of the monitor 200 will be described again with reference to the flowchart shown in FIG.

  When the state value for each secondary battery 20 is transmitted from the measuring device 100 and the measurement control unit 211 of the monitor 200 receives this via the interface 250, the state value for each secondary battery 20 is stored in the memory 220. (S4).

  Next, the abnormality determination unit 213 calculates a target state value using the basic state value among the state values from the measuring instrument 100, and stores this in the memory 220 (S5).

  Specifically, the abnormality determination unit 213 determines the voltage (target state value) of the secondary battery 20 from the positive electrode potential (basic state value) and the negative electrode potential (basic state value) when the charge / discharge current and the constant current are not flowing. Ask for. Further, the charging rate (target state value) of the secondary battery 20 is obtained from this voltage. The auxiliary storage device 230 stores a correlation between the voltage of the secondary battery 20 and the charging rate of the secondary battery 20, and the abnormality determination unit 213 uses the correlation to store the secondary battery 20. The charging rate of the secondary battery 20 is obtained from the voltage of Further, the measurement control unit 211 obtains a can voltage (target state value) from the positive electrode potential and the cell potential (basic state value) when the charge / discharge current and the constant current are not flowing.

  Further, the abnormality determination unit 213 obtains the voltage of the secondary battery 20 at the predetermined time from the positive electrode potential (basic state value) and the negative electrode potential (basic state value) at the predetermined time when the charge / discharge current is flowing. . Then, the phase difference (target state value) between the current flowing in the secondary battery 20 and the obtained voltage during the predetermined time, and the voltage fluctuation range (target state value) during the predetermined time are obtained.

  Further, the abnormality determination unit 213 obtains the voltage of the secondary battery 20 at this time from the positive electrode potential (basic state value) and the negative electrode potential (basic state value) when a constant current is flowing. At this time, the internal resistance (target state value) is obtained from the current flowing through the secondary battery 20 and the obtained voltage.

  That is, in step 5, the abnormality determination unit 213 sets the voltage of the secondary battery 20 when the charge / discharge current and the constant current are not flowing, the charge rate of the secondary battery 20, the can voltage, the charge / discharge as the target state value. The phase difference between the current and the voltage when the current is flowing, the fluctuation range of the voltage, and the internal resistance are calculated.

  Next, for each secondary battery 20, the comparison unit 212 compares the state value from the CMU 30 with the state value from the measuring instrument 100 corresponding to this state value, and both state values are within the same range. Whether or not (S6). Here, the state values that the comparison unit 212 compares are temperature, voltage of the secondary battery 20 (when charging / discharging current and constant current are not flowing), can voltage, and internal resistance. Further, whether or not both state values are within the same range is within a range of a certain ratio of the state values determined as the same range for each state value (for example, 2% of the state value). Judge by whether or not. Note that the temperature as the state value from the CMU 30 is the temperature of the secondary battery 20, and the temperature as the state value from the measuring instrument 100 is the installation environment temperature of the secondary battery 20, so the same range is Wide compared to other state values.

  If the comparison unit 212 determines that both state values are within the same range for any secondary battery 20, the CMU 30 is treated as normal, and the abnormality determination unit 213 performs measurement for each secondary battery 20. It is determined whether or not the state value from the container 100 is within an allowable range (S7). Here, the state value for determining whether or not the value is within the allowable range is the level of the voltage and current when the secondary battery 20 is supplied with the installation environment temperature, the can voltage, and the charge / discharge current. The phase difference ΔP, the voltage fluctuation width ΔV of the secondary battery 20 when the charge / discharge current is passed, and the internal resistance.

  At this time, the abnormality determination unit 213 determines whether or not the secondary battery 20 is abnormal depending on whether or not the threshold stored in the database 231 is exceeded and / or less than the threshold. . As described above, the phase difference ΔP between the voltage and current when the charge / discharge current is supplied to the secondary battery 20 and the voltage fluctuation width ΔV of the secondary battery 20 when the charge / discharge current is supplied are the temperature and It changes according to the charging rate of the secondary battery 20. Therefore, the abnormality determination unit 213 obtains the phase difference threshold value ΔPs and the voltage fluctuation width threshold value ΔVs corresponding to the installation environment temperature and the charging rate of the secondary battery 20 from the deterioration threshold value table 232 shown in FIG. It is determined whether or not the secondary battery 20 is abnormally deteriorated depending on whether or not the state values ΔP and ΔV exceed the corresponding threshold values ΔPs and ΔVs.

  If the abnormality determination unit 213 determines that the state value of any secondary battery 20 is within the allowable range, that is, determines that there is no abnormality, the display control unit 214 indicates that the CMU 30 is normal. To display on the display device 250 that “CMU is normal” and “all secondary batteries are normal” (S8), and a series of processing ends.

  If the abnormality determination unit 213 determines that the state value of any of the secondary batteries 20 is not within the allowable range, that is, determines that the abnormality is abnormal, the abnormality determination unit 213 indicates that the secondary battery 20 is abnormal, and the CMU 30 The display control unit 214 is notified of the normality, the display device 250 is displayed as “CMU normal” and “abnormal secondary battery with ID“ x ”” (S9), and a series of processing ends. . The ID “x” displayed here is the ID of the secondary battery 20 determined to be abnormal. At this time, the contents of the abnormality such as an internal resistance abnormality may be displayed together.

  A repairer or the like looks at the display content of the display device 250 and replaces an abnormal secondary battery among the plurality of secondary batteries 20 with a new secondary battery.

  Further, when the comparison unit 212 determines in step 6 that both state values are not within the same range with respect to any of the secondary batteries 20, the connection control unit 215 applies to the connection switch 41 of the secondary battery module 10. Then, a disconnection instruction is given, and the connection between the CMU 30 and each secondary battery 20 is disconnected (S10). When the CMU 30 is abnormal, the secondary battery 20 may be affected by this influence. Therefore, in step 10, the connection between the CMU 30 and each secondary battery 20 is disconnected in order to eliminate the possibility that the secondary battery 20 becomes abnormal under the influence of the abnormal CMU 30.

  When connection between the CMU 30 and the secondary battery 20 is disconnected by the connection control unit 215, the measurement control unit 211 of the monitor 200 is connected to the module measurement circuit 150 of the measuring instrument 100 in the same manner as in Step 3 described above. The execution of measurement of various state values for each secondary battery 20 is instructed, and measurement of various state values by the module measurement circuit 150 is executed (S11). And the measurement control part 211 receives the state value for every secondary battery 20 from the measuring device 100 via an interface similarly to the above-mentioned step 4, and stores this in the memory 220 (S12). Next, the abnormality determination unit 211 calculates a target state value using the basic state value of the state values from the measuring instrument 100, and stores this in the memory 220 (step 5). S13).

  When the measurement control unit 211 calculates the target state quantity, the abnormality determination unit 213 determines that the new state value from the measuring instrument 100 is within the allowable range for each secondary battery 20 as in step 7 described above. Whether or not (S14). In this step 14 as well, the state value for determining whether or not it is within the allowable range includes the installation environment temperature of the secondary battery 20, the can voltage, and the voltage and current when the charge / discharge current is passed through the secondary battery 20. Phase difference ΔP, voltage fluctuation width ΔV of the secondary battery 20 when charging / discharging current flows, and internal resistance.

  When the abnormality determination unit 213 determines that the state value of any secondary battery 20 is within the allowable range, that is, when it is determined that there is no abnormality, the display control unit indicates that the CMU 30 is abnormal. 214, the display device 250 displays “CMU abnormality” and “all secondary batteries are normal” (S15), and the series of processing ends. Here, the CMU 30 is abnormal because all the secondary batteries 20 are normal but the state value from the CMU 30 and the state value from the measuring instrument 100 are within the same range. Because there is no.

  A repairer or the like looks at the display content of the display device 250 and replaces the abnormal CMU 30 with a new CMU.

  If the abnormality determination unit 213 determines in step 14 that the state value of any of the secondary batteries 20 is not within the allowable range, that is, determines that the state value is abnormal, the abnormality determination unit 213 determines from the measuring device 100 received in step 4. Is compared with the state value from the measuring instrument 100 received in step 12, and it is determined whether or not both state values are within the same range (S16).

  When the abnormality determination unit 213 determines that the two state values are not within the same range, it means that the state value is different between when the secondary battery 20 is connected to the CMU 30 and when it is not connected. Will do. In this case, since the secondary battery 20 is considered to have been adversely affected by the abnormal CMU 30, the abnormality determination unit 213 notifies the display control unit 214 that the CMU 30 is abnormal and that the secondary battery 20 is abnormal. Then, “CMU normal” and “abnormal secondary battery with ID“ x ”” are displayed on the display device 250 (S17), and the series of processing ends.

  A repairer or the like looks at the display content of the display device 250 and replaces the abnormal CMU 30 with a new CMU and replaces the abnormal secondary battery 20 with a new secondary battery.

  If the abnormality determining unit 213 determines that both state values are within the same range, the abnormality determining unit 213 notifies the display control unit 214 that the CMU 30 may be abnormal and the secondary battery 20 is abnormal, and the display device 250. Then, “CMU normal” and “abnormality of secondary battery with ID“ x ”” are displayed (S17), and a series of processing ends. Here, the reason that the CMU 30 may be abnormal is because the CMU abnormality may not be an abnormality that adversely affects the secondary battery 20.

  A repairer or the like looks at the display content of the display device 250 and first replaces the abnormal secondary battery 20 with a new secondary battery. Subsequently, the monitor 200 causes the flow shown in FIGS. 10 and 11 to be executed. If the display content when the monitor 200 determines in step 6 that the state value from the CMU 30 and the state value from the measuring instrument 100 are not within the same range, it can be determined that the CMU 30 is abnormal. Therefore, this CMU 30 is replaced with a new CMU.

  As described above, in this embodiment, by placing the cover plate 130 of the measuring instrument 100 on the case body of the secondary battery module 10, the various probes and connectors are positioned at the target locations. It is possible to save the trouble of positioning the at the desired location.

  In the present embodiment, since the presence / absence of abnormality of the secondary battery 20 is displayed together with the presence / absence of abnormality of the CMU 30, the cause of the abnormality of the secondary battery module 10 is the abnormality of the secondary battery 20 or the abnormality of the CMU 30. You can know immediately. For this reason, in this embodiment, it is possible to reduce the time and effort of diagnosis, and it is possible to eliminate unnecessary repair work such as replacement of the secondary battery 20 having no abnormality as in the prior art. You can save time and effort.

  In the above embodiment, the monitor 200 executes the process of calculating the target state value using the basic state value, but the measuring device 100 may execute this process.

  Further, the monitor 200 uses only the state value from the measuring device 200 when determining whether or not the state value is within the allowable range in step 7 of FIG. It may be used.

  10: secondary battery module, 11: case, 12: case main body, 20: secondary battery, 21: positive terminal, 22: negative terminal, 23: upper surface, 30: CMU (control circuit), 32: CMU side connector ( Control side connector), 40: signal line, 41: connection switch, 42: switch side connector, 100: measuring instrument, 110: probe, 110a: temperature measurement probe, 110b: can potential measurement probe, 110c: first positive electrode probe, 110d: first negative electrode probe, 110e: second positive electrode probe, 110f: second negative electrode probe, 111: current supply end (contact end), 112: potential measurement pin (contact pin), 113: fixing portion, 114: spring, 120: First diagnosis side connector, 140: Second diagnosis side connector, 150: Module measurement circuit, 160: Cell measurement circuit, 161: Temperature measurement Path, 162: can potential measurement circuit, 163: charge / discharge current / voltage measurement circuit, 166: internal resistance measurement circuit, 170: CPU, 172: cell measurement control, 200: monitor (diagnostic device), 210: CPU, 211: Measurement control unit, 212: comparison unit, 213: abnormality determination unit, 214: display control unit, 215: connection control unit, 250: display device (output unit)

Claims (14)

A secondary battery comprising: a secondary battery; a control circuit that obtains a state value of the secondary battery and outputs the state value; and a control-side connector for connecting the control circuit and an external device In the module diagnostic device,
A measuring instrument having a probe used to measure the state value of the secondary battery or a basic state value necessary to obtain the state value;
A diagnostic device for diagnosing the secondary battery based on the state value or the basic state value measured by the measuring device;
With
The measuring instrument is
A diagnostic connector that is connected to the diagnostic device and connected to the control connector;
The diagnosis side connector can be connected to the control side connector while covering the upper surface side where the electrode terminal of the secondary battery is provided and holding the probe at a position where the state value or the basic state value can be measured. A lid plate holding the diagnostic connector in position,
The diagnostic device includes:
A receiving unit that receives the state value or the basic state value measured by the measuring device and receives the state value from the control circuit via the control-side connector and the diagnosis-side connector;
The state value from the measuring instrument or the state value obtained from the basic state value is compared with the state value from the control circuit to determine whether or not both state values are in the same range. A comparison unit;
When the comparison unit determines that the two state values are within the same range, the state value obtained from the state value from the measuring instrument or the basic state value, and the state value from the control circuit An abnormality determination unit that determines whether or not the secondary battery is normal based on at least one of the state values;
An output unit that outputs a determination result in the abnormality determination unit, and outputs that the control circuit is normal when the comparison unit determines that the two state values are within the same range; Having
A diagnostic apparatus for a secondary battery module. The diagnostic apparatus for a secondary battery module according to claim 1,
As the probe, having a contact probe that contacts a part of the upper surface side of the secondary battery,
The contact probe is attached to the fixing portion fixed to the lid plate, a contact pin that contacts the part of the secondary battery, and the fixing portion, and the lid plate is disposed on the upper surface side of the secondary battery. An elastic member that presses the contact pin against the partial side of the secondary battery when
A diagnostic apparatus for a secondary battery module. The diagnostic apparatus for a secondary battery module according to claim 1 or 2,
The lid plate has a connector holding portion that movably holds the diagnostic-side connector in the insertion / extraction direction with respect to the control-side connector when the lid plate is disposed on the upper surface side of the secondary battery.
A diagnostic apparatus for a secondary battery module. In the diagnostic apparatus of the secondary battery module according to any one of claims 1 to 3,
The secondary battery module includes a signal line that connects the control circuit and the secondary battery, and disconnection and switching of the signal line so that the control circuit acquires the state value of the secondary battery. A connection switch,
The diagnostic device includes a connection control unit that causes the connection switch of the secondary battery module to be disconnected when the abnormality determination unit determines that the two state values are not within the same range.
A diagnostic apparatus for a secondary battery module. In the diagnostic apparatus of the secondary battery module according to claim 4,
The receiving unit of the diagnostic device receives the state value or the basic state from the measuring device after the connection switch of the secondary battery module is disconnected by the connection control unit,
The abnormality determination unit of the diagnostic device uses the state value from the measuring device or the state value obtained from the basic state value after the connection switch is disconnected to determine whether there is an abnormality in the secondary battery. And determining that there is no abnormality in the secondary battery, notifies the output unit that the control circuit is abnormal,
The output unit determines that the abnormality is not abnormal in the secondary battery, and notifies that the control circuit is abnormal. Outputs that the circuit is abnormal,
A diagnostic apparatus for a secondary battery module. The diagnostic apparatus for a secondary battery module according to claim 4 or 5,
The secondary battery module has a switch-side connector for giving a control signal from the outside to the connection switch,
The measuring instrument is connected to the diagnostic instrument and has a second diagnostic connector connected to the switch connector,
The lid plate holds the second diagnostic side connector at a position where the second diagnostic side connector can be connected to the switch side connector while holding the probe at a position where the state value or the basic state value can be measured. To
A diagnostic apparatus for a secondary battery module. In the diagnostic apparatus of the secondary battery module according to any one of claims 1 to 6,
The measuring instrument is
As the probe, a positive electrode side current supply terminal and a positive electrode side potential measurement probe that are in contact with the positive electrode terminal of the secondary battery, a negative electrode side current supply terminal and a negative electrode side potential measurement probe that are in contact with the negative electrode terminal of the secondary battery,
A charge / discharge current generating unit that generates a charge / discharge current according to an instruction from the diagnostic device, and supplies the charge / discharge current to the secondary battery via the positive-side current supply end and the negative-side current supply end;
A current measuring unit for measuring a current flowing through the positive electrode side current supply end or the negative electrode side current supply end;
A voltage measuring unit for measuring a potential applied to the positive electrode side potential measuring probe and a potential applied to the negative electrode side potential measuring probe;
Have
The abnormality determination unit of the diagnostic device is configured such that when the charge / discharge current generation unit generates the charge / discharge current, a potential applied to the positive potential measurement probe and a potential applied to the negative potential measurement probe Finding the phase difference between the voltage that is the difference and the current measured by the current measurement unit, and determining that the secondary battery is abnormal when the phase difference exceeds a threshold for the phase difference,
A diagnostic apparatus for a secondary battery module. The diagnostic apparatus for a secondary battery module according to claim 7,
The measuring device has, as the probe, a temperature detection probe for detecting a temperature in an installation environment of the secondary battery,
The diagnostic device has a temperature measurement unit that measures a temperature in an installation environment of the secondary battery by a signal from the temperature detection probe,
When the abnormality determination unit of the diagnostic device makes an abnormality determination based on the phase difference when the charge / discharge current generation unit generates the charge / discharge current, the temperature is used as the threshold for the phase difference. Set the threshold according to the temperature measured by the measurement unit,
A diagnostic apparatus for a secondary battery module. The diagnostic apparatus for a secondary battery module according to claim 7 or 8,
The abnormality determination unit is a difference between a potential applied to the positive potential measuring probe measured by the voltage measuring unit and a potential applied to the negative potential measuring probe measured when the current is not flowing through the secondary battery. Using a certain voltage, the charging rate of the secondary battery is obtained, and a threshold value corresponding to the charging rate is determined as the threshold value for the phase difference.
A diagnostic apparatus for a secondary battery module. In the diagnostic apparatus of the secondary battery module according to any one of claims 1 to 6,
The measuring instrument is
As the probe, a positive electrode side current supply terminal and a positive electrode side potential measurement probe that are in contact with the positive electrode terminal of the secondary battery, a negative electrode side current supply terminal and a negative electrode side potential measurement probe that are in contact with the negative electrode terminal of the secondary battery,
A charge / discharge current generating unit that generates a charge / discharge current according to an instruction from the diagnostic device, and supplies the charge / discharge current to the secondary battery via the positive-side current supply end and the negative-side current supply end;
A voltage measuring unit for measuring a potential applied to the positive electrode side potential measuring probe and a potential applied to the negative electrode side potential measuring probe;
Have
The abnormality determination unit of the diagnostic device is configured such that when the charge / discharge current generation unit generates the charge / discharge current, a potential applied to the positive potential measurement probe and a potential applied to the negative potential measurement probe Obtaining a voltage fluctuation range which is a difference, and determining that the secondary battery is abnormal when the fluctuation range exceeds a threshold value for the fluctuation range;
A diagnostic apparatus for a secondary battery module. The diagnostic apparatus for a secondary battery module according to claim 10,
The measuring device has, as the probe, a temperature detection probe for detecting a temperature in an installation environment of the secondary battery,
The diagnostic device has a temperature measurement unit that measures a temperature in an installation environment of the secondary battery by a signal from the temperature detection probe,
When the abnormality determination unit of the diagnostic device makes an abnormality determination based on the fluctuation range of the voltage when the charge / discharge current generation unit generates the charge / discharge current, as the threshold for the fluctuation range, Determining a threshold value according to the temperature measured by the temperature measuring unit;
A diagnostic apparatus for a secondary battery module. The diagnostic apparatus for a secondary battery module according to claim 10 or 11,
The abnormality determination unit is a difference between a potential applied to the positive potential measuring probe measured by the voltage measuring unit and a potential applied to the negative potential measuring probe measured when the current is not flowing through the secondary battery. Using a certain voltage, the charging rate of the secondary battery is obtained, and a threshold value corresponding to the charging rate is determined as the threshold value for the fluctuation range.
A diagnostic apparatus for a secondary battery module. The diagnostic apparatus for a secondary battery module according to any one of claims 7 to 12,
The positive electrode side potential measurement probe has a positive electrode side contact pin that contacts a positive electrode terminal of the secondary battery,
The positive electrode side current supply end has a positive electrode side contact end that contacts the positive electrode terminal at a plurality of positions symmetrical about the positive electrode side contact pin,
The positive side current supply end and the positive side potential measurement probe are unitized to form a positive side probe unit,
The positive electrode side probe unit has the positive electrode side current supply end and the positive electrode side electric potential measuring probe, and is attached to the positive electrode side fixing portion fixed to the lid plate, the positive electrode side fixing portion, and the lid plate An elastic member that presses the positive electrode side contact pin of the positive electrode side potential measurement probe against the positive electrode terminal of the secondary battery when arranged on the upper surface side of the secondary battery; The positive electrode side contact end is attached to the positive electrode side fixing portion so as to contact the positive electrode terminal when the cover plate is arranged on the upper surface side of the secondary battery,
The negative electrode side potential measurement probe has a negative electrode side contact pin that contacts a negative electrode terminal of the secondary battery,
The negative electrode side current supply end has a negative electrode side contact end that contacts the negative electrode terminal at a plurality of positions symmetrical about the negative electrode side contact pin,
The negative electrode side current supply end and the negative electrode side potential measuring probe are unitized to form a negative electrode side probe unit,
The negative electrode side probe unit includes the negative electrode side current supply end and the negative electrode side potential measurement probe, and is attached to the negative electrode side fixing portion fixed to the lid plate and the negative electrode side fixing portion. An elastic member that presses the negative electrode side contact pin of the negative electrode potential measuring probe against the negative electrode terminal of the secondary battery when arranged on the upper surface side of the secondary battery. The negative electrode side contact end is attached to the negative electrode side fixing portion so as to contact the negative electrode terminal when the cover plate is disposed on the upper surface side of the secondary battery.
A diagnostic apparatus for a secondary battery module. The diagnostic apparatus for a secondary battery module according to claim 1,
As the probe, having a contact probe that contacts a part of the upper surface side of the secondary battery,
The combined weight of the lid plate, the probe, and the diagnostic connector is such that the part of the contact probe and the upper surface side of the secondary battery when the lid plate is disposed on the upper surface side of the secondary battery. Is the weight at which the contact pressure between
A diagnostic apparatus for a secondary battery module.

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