JP5573575B2 - VEHICLE BATTERY MONITORING DEVICE, VEHICLE BATTERY MONITORING SYSTEM, AND VEHICLE BATTERY DIAGNOSIS METHOD - Google Patents

Description

  The present invention relates to a vehicle battery monitoring device and the like for diagnosing deterioration of a battery mounted on a vehicle.

  2. Description of the Related Art Hybrid vehicles and electric vehicles equipped with a chargeable / dischargeable battery as a power source are known. The battery is mounted on the vehicle as an assembled battery in which a plurality of unit cells are electrically connected. A battery deteriorates by repeating charge and discharge. For this reason, in order to maintain the performance of the vehicle, it is necessary to replace the battery at a predetermined cycle.

  As a determination means for determining the deterioration state of the battery, Patent Document 1 determines the deterioration degree of the battery based on parameters such as battery use time, battery use temperature average, battery average voltage, number of charges, average charge degree, and internal resistance. And the vehicle diagnostic system which displays this on the display of a vehicle is disclosed.

JP 2005-227141 A JP 2007-282413 A

  However, in the configuration of Patent Document 1, the monitoring unit corresponding to the number of single cells cannot be changed according to the user's preference. For example, when the deterioration state is determined for a battery in which a plurality of battery stacks composed of a plurality of single cells are connected, only the deterioration state of the entire battery can be determined. Here, since the battery is expensive, when the whole battery is replaced, the cost increases and the burden on the user increases.

  Therefore, depending on the user, there is a case where only a part of the battery (unit cell, battery stack) in which a problem has occurred is replaced, and it is not desired to replace the entire battery.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle battery monitoring device that can change the battery monitoring unit according to user preferences.

In order to solve the above-described problems, a vehicle battery monitoring device according to the present invention is (1) a vehicle battery monitoring device that performs diagnosis related to deterioration of a battery in which a plurality of single cells are connected. And a controller that executes diagnosis relating to the deterioration of the battery based on the monitoring unit set by the first setting unit, the monitoring unit depending on the diagnosis method change Te can be characterized by Rukoto.

  (2) In the configuration of (1), a second setting means for setting the battery diagnosis method can be provided. According to the configuration of (2), the user can select a monitoring unit and a diagnostic method according to preference.

( 3 ) In the configuration of (1) or (2) , the battery is composed of a battery pack including a plurality of battery stacks to which a plurality of single cells are connected, and the first monitoring is performed in units of the single cells. One of the monitoring units, the second monitoring unit for monitoring in units of the battery stack, and the third monitoring unit for monitoring in units of the battery pack is set in the first setting means. be able to. According to the configuration of ( 3 ), the user can select any one of the unit cell, the battery stack, and the battery pack as a monitoring unit according to preference.

( 4 ) In the configurations of (1) to ( 3 ), vehicle history input means for inputting vehicle history information of a vehicle on which the battery is mounted can be provided. According to the configuration of (4), it becomes easy to specify the reference data to be compared with the diagnosis result of the monitoring unit when determining the deterioration of the set monitoring unit.

( 5 ) In the configuration of ( 4 ), a communication unit is provided that transmits the diagnosis result to the outside of the vehicle battery monitoring device in association with the vehicle history information. According to the structure of ( 5 ), the said diagnostic result can be transmitted to another apparatus.

( 6 ) The vehicle battery monitoring device according to ( 5 ), and a diagnostic device that communicates with the battery monitoring device via the communication unit, wherein the diagnostic device includes a storage unit, a diagnostic controller, The diagnostic controller compares the reference data stored in the storage unit with the diagnostic result, and performs a deterioration determination of the monitoring unit set by the first setting unit. you.

( 7 ) In the configuration of ( 6 ), when the diagnosis controller determines that the deterioration degree of the diagnosis result is higher than the reference data, the reference data can be rewritten to the diagnosis result. According to the configuration of ( 7 ), highly accurate diagnostic data can be collected.

(8) A method of monitoring the vehicle battery to perform diagnosis of deterioration of the battery with battery cells connected in multiple, a first step of setting in accordance with the monitoring unit of the battery to the diagnostic method, the first a second step of performing a diagnosis of deterioration based on the monitoring unit set at 1 in step, characterized in that it has a.

( 9 ) The configuration of ( 8 ) may include a third step of setting the battery diagnosis method. According to the configuration of ( 9 ), the user can select a monitoring unit and a diagnostic method according to preference.

( 10 ) In the configuration of ( 8 ) or ( 9 ), there may be a fourth step of inputting vehicle history information of a vehicle on which the battery is mounted. According to the configuration of ( 10 ), it is easy to specify reference data to be compared with the diagnosis result of the monitoring unit when determining the deterioration of the set monitoring unit.

( 11 ) In the configurations of ( 8 ) to ( 10 ), the battery is configured by a battery pack including a plurality of battery stacks to which a plurality of unit cells are connected, and in the first step, One of the first monitoring unit for monitoring in units, the second monitoring unit for monitoring in units of the battery stack, and the third monitoring unit for monitoring in units of the battery pack is set. be able to. According to the configuration of ( 11 ), the user can select any one of the unit cell, the battery stack, and the battery pack as a monitoring unit according to preference.

  According to the present invention, the battery monitoring unit can be changed according to the user's preference.

It is a system configuration figure of a network management system provided with a battery failure information management server. It is a block diagram of the element in connection with charging / discharging of a battery. It is a disassembled perspective view of a battery stack. It is a block diagram of a battery life monitoring apparatus. It is the figure which showed the behavior of the voltage value in three different battery cells. The behavior of the voltage values of three different battery cells when the battery is forcibly discharged is shown. The relationship between the current value and the voltage value (IV characteristics) is shown for three different battery cells. It shows that three different battery cells were discharged intermittently and the discharge currents (I1 <I2 <I3) of these battery cells were increased stepwise. It is the flowchart which showed the procedure of the degradation diagnostic method. It is the schematic diagram which showed typically UI (User Interface) at the time of inputting vehicle history information. This is a schematic diagram showing the UI (User Interface) when selecting a diagnostic unit. It is the schematic diagram which showed typically UI (User Interface) at the time of selecting diagnostic mode. It is the schematic diagram which showed typically UI (User Interface) at the time of displaying improvement information.

  The vehicle battery monitoring device of the present invention will be described with reference to the drawings. FIG. 1 is a network configuration diagram showing a configuration of a network management system including a battery failure information management server (diagnosis device). The vehicle battery monitoring system of this embodiment includes a battery failure information management server 5 and a plurality of store servers 50A to 50N. The battery failure information management server 5 and the plurality of store servers 50A to 50N are connected to each other via a network. The network may be a LAN (Local Area Network) or a WAN (Wide Area Network).

  The battery failure information management server 5 includes a server controller (diagnostic controller) 501, a server memory 502, and an HDD (Hard Disk Drive) 503. The server controller 501 controls the entire electronic failure information management server 5. The server controller 501 may be a CPU (Central Processing Unit). The battery failure information management server 5 receives battery deterioration diagnosis information transmitted from the store servers 50 </ b> A to 50 </ b> N via the network, and accumulates it in the HDD (storage unit) 503. The server controller 501 can also transmit the battery deterioration diagnosis information stored in the HDD 503 in response to requests from the store servers 50A to 50N.

  Here, the battery deterioration diagnosis information stored in the HDD 503 may be information in which the vehicle-type battery deterioration information is associated with the vehicle history information. The battery deterioration information may be battery voltage characteristics, discharge characteristics, and internal resistance. As described later, the battery deterioration information is stored in the HDD 503 in association with the vehicle history information in units of batteries, stacks, and cells.

  The vehicle history information may include information on the use area, information on the purpose of use, and information on the use results. The information regarding the use area may include temperature information, humidity information, and terrain information. The purpose of use may include usage and travel history. The usage record may include distance and years of use.

  The battery failure information management server 5 updates the reference data stored in the HDD 503 based on the battery deterioration diagnosis information transmitted from the store servers 50A to 50N. For example, when the battery deterioration degree obtained based on the latest battery deterioration diagnosis information transmitted from the store servers 50A to 50N is higher than the battery deterioration degree obtained based on the reference data stored in the HDD 503, the reference Update the data to the latest battery deterioration diagnosis information.

  The server controller 501 has a role of performing various processes in the battery failure information management server 5, and realizes various functions by executing programs stored in the server memory 502. The server memory 502 may be a RAM (Random Access Memory), a ROM (Read Only Memory), a DRAM (Dynamic Random Access Memory), an SRAM (Static Random Access Memory), or a VRAM (Video RAM).

  Store server 50A-50N may be installed in each store of vehicles. A vehicle battery monitoring device 30 is communicably connected to the store server 50A. An arrow displayed between the store server 50A and the vehicle battery monitoring device 30 indicates a communication direction, and the store server 50A and the vehicle battery monitoring device 30 are configured to be capable of bidirectional communication. Therefore, the user can receive a deterioration diagnosis at an arbitrary timing by going to the store. The other store servers 50B to 50N are each provided with a battery life device 30, but are omitted in the present specification and drawings for the sake of simplicity.

  The vehicle battery monitoring device 30 performs deterioration diagnosis of the battery 2 mounted on the vehicle 1. The vehicle 1 may be a hybrid vehicle or an electric vehicle. The vehicle battery monitoring device 30 is connected to the battery 2 via a cable 81. The vehicle battery monitoring device 30 can perform the deterioration diagnosis in a state where the battery 2 is mounted on the vehicle 1.

  Next, a part of the configuration of the vehicle 1 on which the battery 2 is mounted will be described with reference to FIGS. 2 and 3. FIG. 2 is a block diagram of elements related to charging / discharging of the battery 2. FIG. 3 is an exploded perspective view of the battery stack. Here, the X axis, the Y axis, and the Z axis shown in FIG. 3 indicate three mutually orthogonal axes.

  The battery 2 is connected to the booster circuit 102 via the system main relays 101A and 101B. Booster circuit 102 boosts the output voltage of battery 2 and outputs the boosted voltage to inverter 103. The inverter 103 converts the DC power from the booster circuit 102 into AC power and outputs the AC power to the motor / generator (three-phase AC motor) 104. The kinetic energy generated by the motor / generator 104 is used as energy for driving the vehicle 1.

  When the vehicle 1 is braked, electric energy is generated by the motor / generator 104 and output to the inverter 103. The inverter 103 converts AC power from the motor / generator 104 into DC power and outputs the DC power to the booster circuit 102. The step-up circuit 102 steps down the output voltage of the inverter 103 and then outputs it to the battery 2 to charge the battery 2.

  Battery 2 includes a plurality of battery stacks 20A to 20Z. These battery stacks 20A to 20Z are electrically connected in series via conductive wires. The battery stack 20A includes a plurality of battery cells (single cells) 201A to 201E. These battery cells 201A to 201E are stacked in the X-axis direction via a spacer 202A. A pair of end plates 203 </ b> A are located at both ends in the X-axis direction of the laminate.

  A binding band (not shown) is connected to the pair of end plates 203A. The restraint band applies a compression force that compresses the battery cells 201A to 201E in the X-axis direction via the end plate 203A. Thereby, the output characteristics of the battery 2 can be maintained.

  The battery cell 201A may be a lithium ion battery. The battery cell 201A includes a positive electrode terminal 201A and a negative electrode terminal 201B on its upper end surface. The positive electrode terminal 2011A and the negative electrode terminal 2012A face each other in the Y-axis direction. The positive electrode terminal 2011A and the negative electrode terminal 2012A are connected to the negative electrode terminal 2012A and the positive electrode terminal 2011A of another battery cell 201 adjacent to each other via a bus bar (conductive plate) (not shown).

  A plurality of ribs 2021A are formed on the end surface in the X-axis direction of the spacer 202A. These ribs 2021A are located at a predetermined interval in the Z-axis direction. Each rib 2021A extends in the Y-axis direction. In the assembled state of the battery stack 20A, each rib 2021A contacts the outer surface of the battery cell 201A. Thereby, a cooling passage extending in the Y-axis direction is formed between the ribs 2021A arranged in the Z-axis direction.

  Cooling air is supplied into the cooling passage from one end surface side of the battery stack 20A in the Y-axis direction. The cooling air supplied to the cooling passage moves while cooling the battery cells 201A to 201E, and is discharged from the other end surface side of the battery stack 20A in the Y-axis direction. Thereby, deterioration accompanying the temperature rise of battery cell 201A-201E is suppressed. The cooling air is generated by a fan (not shown). The fan may be a sirocco fan, a cross flow fan, or a propeller fan.

  Referring to FIG. 2, voltage detection circuit 105 is connected to each battery cell 201 of battery 2, and voltage detection circuit 105 outputs information on the voltage value of each battery cell 201 to battery controller 106. A current sensor 107 is connected to the battery 2, and the current sensor 107 outputs information related to a current value flowing through the battery 2 to the battery controller 106.

  Next, the configuration of the vehicle battery monitoring device 30 will be described in detail with reference to FIG. Arrows indicate the direction of signal flow. The vehicle battery monitoring apparatus 30 includes a deterioration monitoring controller 31, a data transmission / reception unit (communication unit) 32, an input unit (first setting unit, second setting unit, vehicle history information input unit) 33, a display unit 34, and a deterioration unit. A monitoring memory 35 is provided. The deterioration monitoring controller 31 controls the entire vehicle battery monitoring device 30. The input unit 33 can be composed of a keyboard, a mouse, a touch panel, a touchpad, a graphics tablet, a dedicated button, and the like.

  The display unit 34 can be configured by an LCD (Liquid Crystal Display), an EL (Electronic Luminescence), a PDP (Plasma Display Panel), a CRT (Cathode Ray Tube), or the like. However, the functions of the input unit 33 and the display unit 34 can be integrated into a display input unit (for example, a touch panel display).

  The deterioration monitoring memory 35 may be a RAM (Random Access Memory), a ROM (Read Only Memory), a DRAM (Dynamic Random Access Memory), an SRAM (Static Random Access Memory), or a VRAM (Video RAM).

  The deterioration monitoring memory 35 may store an execution program for executing the first to third deterioration diagnosis modes. The first deterioration diagnosis mode is a mode for detecting voltage fluctuations according to charging / discharging of the battery 2. FIG. 5 shows the behavior of voltage values (an example) in the three battery cells 201A, 201E, and 201F. The voltage values of the battery cells 201A, 201E, and 201F change according to the charge / discharge of the battery 2, but when the input / output characteristics of the battery cells 201A, 201E, and 201F vary, the battery cells 201A and 201E , 201F may be different from each other.

  As shown in FIG. 5, the battery cell 201 </ b> F has a voltage value lower than that of the other battery cells 201 </ b> A and 201 </ b> E with the passage of time, and it can be determined that the deterioration is progressing. Thus, by monitoring the voltage values of the battery cells 201A to 201Z, it is possible to determine whether or not the battery cell 201Z is in a deteriorated state.

  Here, the HDD 503 of the battery failure information management server 5 stores reference data relating to voltage fluctuations of battery cells having the same vehicle history information as the battery cells 201A to 201Z. Therefore, these voltage fluctuation waveforms are compared with each other, and when the voltage drop amount of the battery cell 201F is larger than the reference data, it can be determined that the battery cell 201F has deteriorated. In this case, the reference data stored in the HDD 503 of the battery failure information management server 5 is rewritten with data relating to voltage fluctuation of the battery cell 201F.

  In the embodiment illustrated in FIG. 5, the voltage fluctuation is detected based on the unit of the battery cells 201 </ b> A to 201 </ b> Z. However, the voltage fluctuation can also be detected in units of the battery stacks 20 </ b> A to 20 </ b> Z that are larger than the battery cell 201.

  Here, the HDD 503 of the battery failure information management server 5 stores reference data relating to voltage fluctuations of the battery stack having the same vehicle history information as the battery stacks 20A to 20Z. Accordingly, these voltage fluctuation waveforms are compared with each other, and when the voltage drop amount of the battery stack 20B (one example) is larger than the reference data, it can be determined that the battery stack 20B has deteriorated. . In this case, the reference data stored in the HDD 503 of the battery failure information management server 5 is rewritten with data relating to voltage fluctuations in the battery stack 20B.

  It is also possible to detect voltage fluctuations in units of the battery 2 having a unit larger than that of the battery stacks 20A to 20Z. Here, the HDD 503 of the battery failure information management server 5 stores reference data relating to voltage fluctuations of a battery having the same vehicle history information as the battery 2. Therefore, by comparing these voltage fluctuation waveforms, if the voltage drop amount of the battery 2 is larger than the reference data, it can be determined that the battery 2 has deteriorated. In this case, the reference data stored in the HDD 503 of the battery failure information management server 5 is rewritten with data relating to voltage fluctuations of the battery 2.

  As described above, the reference data stored in the HDD 503 of the battery failure information management server 5 is sequentially updated, so that the accuracy of the battery deterioration diagnosis result can be improved. In the initial state, the reference data stored in the HDD 503 of the battery failure information management server 5 may be a manufacturer value determined in advance by the manufacturer.

  The second deterioration diagnosis mode is a mode for detecting the discharge characteristics of the battery 2. FIG. 6 shows the behavior of the voltage values of the three battery cells 201A, 201E, 201F when the battery 2 is forcibly discharged. As illustrated in FIG. 6, the voltage value of the battery cell 201F starts to decrease at an earlier timing than the voltage values of the other battery cells 201A and 201E, and the battery cell 201F can be determined to be deteriorated. it can. Thus, by monitoring the decrease in the voltage value of each of the battery cells 201A to 201Z when the battery 2 is forcibly discharged, it can be determined whether or not each of the battery cells 201A to 201Z is in a deteriorated state. .

  Here, the HDD 503 of the battery failure information management server 5 stores reference data relating to the discharge characteristics of battery cells having the same vehicle history information as the battery cells 201A to 201Z. Accordingly, these discharge characteristics waveforms are compared with each other, and when the voltage drop amount of the battery cell 201F is larger than the reference data, it can be determined that the battery cell 201F has deteriorated. In this case, the reference data stored in the HDD 503 of the battery failure information management server 5 is rewritten with data relating to the discharge characteristics of the battery cell 201F.

  In the embodiment illustrated in FIG. 6, the discharge characteristics are examined for each of the battery cells 201 </ b> A to 201 </ b> Z, but the discharge characteristics can also be detected in units of the battery stacks 20 </ b> A to 20 </ b> Z that are larger than the battery cell 201. Here, the HDD 503 of the battery failure information management server 5 stores reference data regarding the discharge characteristics of the battery stack having the same vehicle history information as the battery stacks 20A to 20Z. Accordingly, these discharge characteristics waveforms are compared with each other, and when the voltage drop amount of the battery stack 20B (one example) is larger than the reference data, it can be determined that the battery stack 20B has deteriorated. . In this case, the reference data stored in the HDD 503 of the battery failure information management server 5 is rewritten with data relating to the discharge characteristics of the battery stack 20B.

  The discharge characteristics can also be detected in units of the battery 2 having a unit larger than that of the battery stacks 20A to 20Z. Here, the HDD 503 of the battery failure information management server 5 stores reference data relating to voltage fluctuations of a battery having the same vehicle history information as the battery 2. Therefore, these voltage fluctuation waveforms are compared with each other, and when the voltage drop amount of the battery 2 is larger than the reference data, it can be determined that the battery 2 has deteriorated. In this case, the reference data stored in the HDD 503 of the battery failure information management server 5 is rewritten with data relating to voltage fluctuations of the battery 2.

  The third deterioration diagnosis mode is a mode for detecting internal resistance. FIG. 7 shows the relationship between the current value and the voltage value (IV characteristics) in the three battery cells 201A, 201E, and 201F. In the example shown in FIG. 7, the current values of the battery cells 201A, 201E, and 201F are detected using a current sensor. As shown in FIG. 8, when the battery cells 201A, 201E, and 201F are intermittently discharged and the discharge currents (I1 <I2 <I3) of the battery cells 201A, 201E, and 201F are increased stepwise, The voltage values of the battery cells 201A, 201E, and 201F are measured.

  Here, when the input / output characteristics of the battery cells 201A, 201E, and 201F vary, the relationship between the current value and the voltage value is different as shown in FIG. In FIG. 8, when the discharge current is changed from the current value I1 to the current value I3, the voltage value of the battery cell 201F is the lowest, and it can be determined that the battery cell 201F has been deteriorated. . Thus, by monitoring the relationship between the current value and the voltage value in the battery cells 201A to 201Z (in other words, the internal resistance of the battery cells 201A to 201Z), it is determined whether or not the battery cells 201A to 201Z are in a deteriorated state. Judgment can be made.

  Here, the HDD 503 of the battery failure information management server 5 stores reference data related to the internal resistance of the battery cell having the same vehicle history information as the battery cells 201A to 201Z. Therefore, these internal resistances are compared with each other, and when the internal resistance of the battery cell 201F is larger than the reference data, it can be determined that the battery cell 201F has deteriorated. In this case, the reference data stored in the HDD 503 of the battery failure information management server 5 is rewritten with data related to the internal resistance of the battery cell 201F.

  In the embodiment illustrated in FIG. 7, the internal resistance of each of the battery cells 201 </ b> A to 201 </ b> Z is detected, but the internal resistance can also be detected in units of the battery stacks 20 </ b> A to 20 </ b> Z that are larger than the battery cell 201. Here, the HDD 503 of the battery failure information management server 5 stores reference data regarding the internal resistance of the battery stack having the same vehicle history information as the battery stacks 20A to 20Z. Therefore, by comparing these internal resistance waveforms with each other, if the internal resistance of the battery stack 20B (which is an example) is larger than the reference data, it can be determined that the battery stack 20B has deteriorated. In this case, the reference data stored in the HDD 503 of the battery failure information management server 5 is rewritten with data related to the internal resistance of the battery stack 20B.

  The internal resistance can also be detected in units of the battery 2 having a unit larger than that of the battery stacks 20A to 20Z. Here, the HDD 503 of the battery failure information management server 5 stores reference data regarding the internal resistance of the battery having the same vehicle history information as the battery 2. Therefore, by comparing these internal resistance waveforms, if the internal resistance of the battery 2 is larger than the reference data, it can be determined that the battery 2 has deteriorated. In this case, the reference data stored in the HDD 503 of the battery failure information management server 5 is rewritten with data relating to the internal resistance of the battery 2.

  Next, a battery failure diagnosis method will be described with reference to FIGS. FIG. 9 is a flowchart showing the procedure of the failure diagnosis method. FIG. 10 is a schematic diagram schematically showing a UI (User Interface) when inputting vehicle history information. FIG. 11 is a schematic diagram schematically showing a UI (User Interface) when selecting a diagnostic unit. FIG. 12 is a schematic diagram schematically showing a UI (User Interface) when selecting a diagnosis mode. FIG. 13 is a schematic diagram schematically showing a UI (User Interface) when displaying improvement information. 9 is executed by the deterioration monitoring controller 31 of the vehicle battery monitoring device 30.

  In step S <b> 101, the deterioration monitoring controller 31 determines whether or not the vehicle battery monitoring device 30 and the battery 2 are connected via the cable 81. When the vehicle battery monitoring device 30 and the battery 2 are connected via the cable 81, the process proceeds to step S102, and when the vehicle battery monitoring device 30 and the battery 2 are not connected, this flow ends.

  In step S <b> 102, the deterioration monitoring controller 31 displays a vehicle history information input screen on the display unit 34. Referring to FIG. 10, the display unit 34 displays an input screen for temperature, humidity, terrain, usage, travel history, distance, and usage date as vehicle history information. A user of the vehicle 1 or a salesclerk at each store inputs vehicle history information to the display unit 34 via the input unit 33. In the present embodiment, the vehicle history information is input via the input unit 33. However, the vehicle history information stored in a memory (not shown) mounted on the vehicle 1 may be acquired. Good. That is, in the case of a vehicle equipped with a so-called navigation system, the deterioration monitoring controller 31 can read the vehicle history information stored in the memory of the vehicle 1 and display it on the display unit 34. A user of the vehicle 1 or a store clerk can check the vehicle history information via the display unit 34. In addition, the vehicle history information displayed on the display unit 34 can be changed by operating the input unit 33 as necessary.

  In step S103, the deterioration monitoring controller 31 determines whether or not all of temperature, humidity, terrain, usage, travel history, distance and date of use as vehicle history information have been input. Advances to step S104.

  In step S <b> 104, the deterioration monitoring controller 31 displays a monitoring unit selection screen on the display unit 34. Referring to FIG. 11, “pack”, “stack”, and “cell (module)” are displayed on the display unit 34 as character information indicating a monitoring unit. A check box is displayed next to the character information. The user or a salesclerk of each store can select a monitoring unit by selecting this check box via the input unit 33. In this embodiment, a cell is selected as a monitoring unit. The “unit” in the “monitoring unit” means a group corresponding to the number of batteries classified for battery management, and a part of the battery group of the pack may be called a battery block for management. is there. In this case, the battery block can also be a target of the monitoring unit.

  According to the above configuration, the monitoring unit can be changed according to the user's preference. When the user desires to reduce the cost when replacing the battery, it is only necessary to select a cell as a monitoring unit and replace only the battery cell diagnosed as being severely degraded. Thereby, environmental load can also be reduced. Furthermore, when the user does not care about the cost, a pack or stack can be selected as a monitoring unit. For example, when the vehicle inspection is near, it may be desired to exchange in units of packs or stacks. If the user wants to shorten the time required for the deterioration determination, a large monitoring unit may be selected. That is, when a large monitoring unit is selected, it is not necessary to perform a deterioration diagnosis on each of the battery cells 201A to 201Z, so that excessive calculation processing can be reduced. In addition, the monitoring unit can be flexibly changed when the vehicle use area and purpose change.

  In step S105, the deterioration monitoring controller 31 determines whether or not a monitoring unit is selected. If the monitoring unit is selected, the process proceeds to step S106.

  In step S <b> 106, the deterioration monitoring controller 31 displays a battery deterioration diagnosis method selection screen on the display unit 34. Referring to FIG. 12, display unit 34 displays a first mode (voltage characteristic), a second mode (discharge characteristic), and a third mode (internal resistance) as character information indicating a battery deterioration diagnosis method. Is done. A check box is displayed next to the character information. A user of the vehicle 1 or a salesclerk of the store can select a battery deterioration diagnosis method by selecting this check box via the input unit 33. In the present embodiment, the third mode (internal resistance) is selected as the battery deterioration diagnosis method. Since the contents of these first to third modes have been described above, description thereof will not be repeated.

  In this way, by configuring so that the user can select the diagnosis mode, it is possible to provide a service according to the user's preference. In step S107, the deterioration monitoring controller 31 determines whether or not a battery deterioration diagnosis method is selected. If the battery deterioration diagnosis method is selected, the process proceeds to step S108.

  In step S108, the deterioration monitoring controller 31 reads out and executes the selected battery deterioration diagnosis method, that is, the third mode (internal resistance) operation program stored in the deterioration monitoring memory 35.

  In step S109, the deterioration monitoring controller 31 diagnoses the battery life, that is, determines whether the battery life has been diagnosed for all the battery cells 201A to 201Z. When the battery life is diagnosed for all the battery cells 201 </ b> A to 201 </ b> Z in step S <b> 109, the diagnosis result is temporarily stored in the deterioration monitoring memory 35.

  In step S110, the deterioration monitoring controller 31 transmits the diagnosis result together with the vehicle history information input in step S103 from the data transmitting / receiving unit 32 to the store server 50A, and further transmits it to the battery failure information management server 5.

The battery failure information management server 5 reads the corresponding reference data stored in the HDD 503 based on the received vehicle history information, and compares this reference data with the diagnosis result. In this embodiment,
The reference data related to the corresponding internal resistance stored in the HDD 503 is compared with the diagnosis result related to the internal resistance of all the battery cells 201A to 201Z, and the battery cell 201F whose internal resistance is higher than the reference data is specified. The battery failure information management server 5 transmits the improvement information indicating that the battery cell 201F has deteriorated to the vehicle battery monitoring device 30 via the store server 50A.

  In step S111, the deterioration monitoring controller 31 determines whether or not the data transmitting / receiving unit 32 has received the improvement information transmitted from the battery failure information management server 5. If the improvement information is received, the process proceeds to step S112. In step S <b> 112, the deterioration monitoring controller 31 stores the received improvement information in the deterioration monitoring memory 35.

  In step S113, the deterioration monitoring controller 31 displays the received improvement information on the display unit 34. With reference to FIG. 13, the deterioration monitoring controller 31 displays information for identifying a failed part and information on an improvement method as improvement information. In the present embodiment, it is displayed that the battery cell 201F has failed. As an improvement method, it is displayed that the battery cell 201F, the battery stack 20B, and the battery pack 2 can be replaced in any unit. Therefore, the user can select an improvement method according to his / her preference.

(Modification 1)
In the above-described embodiment, the diagnosis result diagnosed in the vehicle battery monitoring device 30 is transmitted to the battery failure information management server 5 and the deterioration determination is performed in the battery failure information management server 5. However, the present invention is not limited to this. is not. The deterioration determination can also be performed in the vehicle battery monitoring device 30. In this case, the vehicle battery monitoring device 30 acquires the reference data from the battery failure information management server 5 by communication and stores it in the deterioration monitoring memory 35. The deterioration monitoring controller 31 transmits the diagnosis result to the battery failure information management server 5 via the data transmitting / receiving unit 32 when the degree of deterioration based on the diagnosis result is higher than the reference data. The battery failure information management server 5 rewrites the reference data stored in the HDD 503 with the received diagnosis result.

(Modification 2)
The vehicle battery monitoring device 30 can also be mounted on a vehicle. In this case, the deterioration diagnosis using the vehicle battery monitoring device 30 is performed on the vehicle. The user can perform vehicle diagnosis without going to the store. Moreover, the structure which performs the diagnosis by the vehicle battery monitoring apparatus 30 in the state which removed the battery 2 from the vehicle 1 may be sufficient.

(Modification 3)
The battery 2 may be a nickel metal hydride battery as a secondary battery. In this case, the monitoring unit of the vehicle battery monitoring device 30 may be a battery module, a battery stack in which a plurality of battery modules are connected, or a battery pack in which a plurality of battery stacks are connected.

(Modification 4)
In the above-described embodiment, the voltage characteristic, the discharge characteristic, and the internal resistance are used as the battery deterioration diagnosis method. However, the present invention is not limited to this, and other deterioration diagnosis methods can be used.

(Modification 5)
In the above embodiment, the vehicle history information is input in step S102 of FIG. 9, the monitoring unit is selected in step S104, and the battery deterioration diagnosis method is selected in step S106. However, the present invention is not limited to this. These input orders can be appropriately changed.

(Modification 6)
In the above-described embodiment, functions corresponding to “first setting means”, “second setting means”, and “vehicle history information input means” described in the claims are performed by the input unit of the vehicle battery monitoring device 30. However, these can be configured separately.

(Modification 7)
In the above-described embodiment, when “cell” is selected as the battery life monitoring unit, the battery life is diagnosed for all the battery cells 201A to 201Z. However, the present invention is not limited to this, The battery cell may be configured to diagnose the battery life. Here, you may comprise the said some battery cell so that a user can select by operating the input part 33. FIG. For example, in the case where it is known that the battery cell located in the center is likely to accumulate heat and easily deteriorate, only the battery cell located in the center can be the diagnosis target. Thereby, the diagnosis time can be further shortened. Similarly, when “stack” is selected as the battery life monitoring unit, a configuration in which some battery stacks are diagnosed may be used.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Battery 5 Battery failure information management server 30 Vehicle battery monitoring apparatus 31 Degradation monitoring controller 32 Data transmission / reception part 33 Input part 34 Display part 35 Deterioration monitoring memory 501 Server controller 502 Server memory 503 HDD

Claims (11)

A vehicle battery monitoring device that diagnoses deterioration of a battery connected to a plurality of single cells,
First setting means for setting a monitoring unit of the battery;
Based on said monitoring unit set in the first setting means, and a controller for executing a diagnosis of deterioration of the battery, the monitoring unit is a vehicle, characterized in Rukoto be changed according to the diagnostic methods Battery monitoring device.   The vehicle battery monitoring apparatus according to claim 1, further comprising a second setting unit that sets the battery diagnosis method. The battery is composed of a battery pack including a plurality of battery stacks to which a plurality of unit cells are connected. A first monitoring unit for monitoring in units of the unit cells, and a first monitoring unit in units of the battery stacks. vehicle according to claim 1 or 2 one of the monitoring units of the third monitoring unit for monitoring at two monitoring units and units of the battery pack and setting in the first setting means Battery monitoring device. The vehicle battery monitoring device according to any one of claims 1 to 3 , further comprising vehicle history input means for inputting vehicle history information of a vehicle on which the battery is mounted. The vehicle battery monitoring apparatus according to claim 4 , further comprising a communication unit that associates the diagnosis result with the vehicle history information and transmits the diagnosis result to the outside of the vehicle battery monitoring apparatus. The vehicle battery monitoring device according to claim 5 ,
A diagnostic device that communicates with the battery monitoring device via the communication unit;
The diagnostic device includes a storage unit and a diagnostic controller, and the diagnostic controller compares reference data stored in the storage unit with the diagnostic result and is set by the first setting unit. A vehicle battery monitoring system characterized in that a deterioration determination of a monitoring unit is performed. 7. The vehicle battery monitoring system according to claim 6 , wherein the diagnosis controller rewrites the reference data to the diagnosis result when it is determined that the degree of deterioration of the diagnosis result is higher than the reference data. . A vehicle battery monitoring method for diagnosing deterioration of a battery connected to a plurality of single cells,
A first step of setting a monitoring unit of the battery according to the diagnostic method ;
A vehicle battery monitoring method, comprising: a second step of making a diagnosis regarding deterioration based on the monitoring unit set in the first step. The vehicle battery monitoring method according to claim 8 , further comprising a third step of setting the battery diagnosis method. The vehicle battery monitoring method according to claim 8 or 9 , further comprising a fourth step of inputting vehicle history information of a vehicle on which the battery is mounted. The battery is composed of a battery pack including a plurality of battery stacks connected to a plurality of single cells,
In the first step, a first monitoring unit for monitoring in units of the unit cells, a second monitoring unit for monitoring in units of the battery stack, and a third monitoring for monitoring in units of the battery pack vehicle battery monitoring method according to any one of claims 8 to 10 and sets one of the monitoring units of the unit.

Images