JP3296624B2 - Electrical equipment that determines the type of battery pack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device for determining the type of a battery pack, such as capacity, type and output voltage.

[0002]

2. Description of the Related Art When charging different types of battery packs with a single charger, it is necessary to charge the battery packs under optimal conditions for each battery type. For example, a nickel cadmium battery and a nickel hydride battery are charged under different conditions.
Also, nickel cadmium batteries and lithium secondary batteries
Charged under different conditions. Furthermore, even if the battery type is the same, the optimal charging condition varies depending on the size of the capacity and the output voltage. Therefore, when charging different types of battery packs with a single charger, it is important to determine the type of battery and charge each battery in an optimal state.

[0003] Not only a charger but also an electric device using a battery pack may identify the type of the battery pack to be used. For example, a device that detects the discharge of a battery pack set in an electric device and turns off the power switch turns off the power switch to prevent overdischarge of the battery when the voltage of the battery pack drops to a set value. It has become. In this electric device, in addition to detecting the voltage and the remaining capacity of the battery, the type of the battery can be determined, and the power switch can be turned off in a more ideal state. This is because the voltage at which the power switch is turned off and the remaining capacity can be changed to optimum values depending on the type of the battery.

[0004] There are roughly two methods for determining the type of battery pack. In the first method, a device in which a battery pack is set calculates and determines the current and voltage characteristics of the battery. For example, it is a method of determining the type of battery from the charging current and voltage characteristics of the battery. This method has a feature that the battery pack does not require a special circuit configuration to determine the type. However, this method has a drawback that it is difficult to accurately determine the battery type with a simple structure because the battery type is determined from the current and voltage characteristics of the battery pack.

[0005] The second method is to incorporate a battery type identification circuit into the battery pack itself. This method is
The battery pack outputs a signal for identifying the battery type. Therefore, the device has a feature that the type of the battery can be accurately identified. In this method, for example, a microcomputer is built in a battery pack. The microcomputer stores a battery type in a memory.
The microcomputer of the battery pack is connected to electrical equipment via a dedicated terminal for type determination provided on the battery pack. The microcomputer of the battery pack outputs a signal corresponding to the type of the battery stored in the memory by a calling signal from the electric device. The electric device determines the type of the battery pack by performing arithmetic processing on the signal from the dedicated type determination terminal.

[0006]

An electric device for determining the type of a battery pack having such a structure has a feature that the battery type can be determined and charged or discharged under optimum conditions. However, this electric device requires a dedicated terminal for type determination in order to determine the type of the battery pack. That is, in addition to the positive and negative electrode terminals of the battery pack, another connection terminal connected to the type determination dedicated terminal is required. For this reason, the structure becomes complicated, and there is a drawback against downsizing of equipment and cost reduction. In the first structure, since the electric device determines the type of the battery pack based on the current and voltage characteristics, a dedicated terminal for type determination is not required. Therefore, there is an advantage that the connection structure between the battery pack and the electric device can be simplified. However, electrical equipment with this structure
As described above, there is a disadvantage that the circuit configuration for identifying the type of battery is complicated. As described above, in the conventional electric apparatus for determining the type of the battery pack, the first one has a complicated battery identification circuit.
However, there is a disadvantage in that the structure of the connecting portion between the battery pack and the electric device becomes complicated. That is, it is not possible to simplify both the circuit configuration of the electric device for identifying the type of battery and the structure of the connection portion between the battery pack and the electric device.

The present inventor has paid attention to using the temperature terminals of the battery pack together for battery identification. A temperature sensor is connected to the temperature terminal of the battery pack. The temperature sensor is
It detects that the battery temperature has risen during charging. A thermistor whose resistance changes according to the ambient temperature is used for the temperature sensor. The thermistor is used as a protection element for detecting battery temperature when charging a battery pack. When the charged battery is abnormally heated during charging, there is a danger that the battery will be deteriorated and the charging device will run out of control. The temperature sensor detects the ambient temperature at the time of charging and outputs a temperature signal from the temperature terminal to electrical equipment so that charging can be stopped if the temperature becomes abnormally high, in order to prevent such situations. is there. As described above, the battery pack is often provided with a temperature terminal from the viewpoint of safety during charging.

In the electric apparatus of the present invention, when the battery is charged, the battery generates heat, and the temperature terminal provided for protecting the battery from abnormally high temperature is skillfully used to change the type of the battery pack. It is characterized in that it is used in combination with a terminal for determination.

Therefore, an important object of the present invention is to simplify the connection portion between the battery pack and the electric equipment and the circuit configuration of the electric equipment, and to further discriminate the type of the battery pack that can accurately identify the battery type. To provide electrical equipment.

[0010]

According to a first aspect of the present invention, there is provided an electric apparatus for judging a type of a battery pack having the following configuration in order to achieve the above object. The electrical equipment for determining the type of battery pack is the +-
A current supply means 4 for supplying a predetermined current to the temperature terminal 2 and a current supplied to the temperature terminal 2 by the current supply means 4. A voltage detecting means 5 for detecting an output voltage of the temperature terminal 2 in a state where the temperature is changed, and a judging means 6 for calculating the voltage detected by the voltage detecting means 5 to determine the type of the battery pack.

According to a second aspect of the present invention, there is provided an electric device for judging the type of a battery pack, wherein the temperature sensor 3 is connected to the + -electrode terminal 1 and the temperature terminal 2. Voltage applying means 7 for applying a predetermined voltage to the +-electrode terminal 1, and voltage detection for applying the voltage to the electrode terminal 1 by the voltage applying means 7 and detecting the output voltage of the temperature terminal 2. And a determining means for calculating the voltage detected by the voltage detecting means to determine the type of the battery pack.

Further, the electric device for judging the type of the battery pack according to the third aspect of the present invention is a type of battery pack in which the temperature sensor 3 is connected to the + -electrode terminal 1 and the temperature terminal 2. Means for flowing a predetermined current to the temperature terminal 2; voltage detecting means 5 for detecting the voltage of the temperature terminal 2 after a predetermined period of time by applying a current to the temperature terminal 2 by the current applying means 8; A determination unit for determining the type of the battery pack by performing arithmetic processing on the voltage detected by the voltage detection unit;

[0013]

According to the first aspect of the present invention, the electric device of the present invention performs the following operation to determine the type of the battery pack. Less than,
In order to make the operation of the electric device easy to understand, the operation of the electric device of FIG. 1 showing a preferred embodiment will be described. The electrical device shown in this figure detects which electrode terminal 1 the temperature sensor 3 is connected to and determines the type of battery. The type of the battery pack is determined based on the connection position of the temperature sensor 3 as shown in FIGS. The battery pack shown in FIG.
The temperature sensor 3 is connected to the negative electrode terminal 1. In the battery pack shown in FIG. 3, the temperature sensor 3 is connected to the positive electrode terminal 1. The battery pack shown in these figures is
The battery type is determined as follows. The switch SW1 of the current supply means 4 is turned on. At this time, the switch SW2 is turned off. A positive voltage is supplied to the temperature terminal 2 via the switch SW1 and the resistor R1. As shown in FIG. 2, in the battery pack in which the temperature sensor 3 is connected to the negative electrode terminal 1, a current flows through the temperature sensor 3 via the switch SW1. Temperature sensor 3
, A voltage is generated across the temperature sensor 3. The voltage at both ends of the temperature sensor 3 is input to the microcomputer 9 as the voltage detecting means 5 via the temperature terminal 2. The microcomputer 9 determines that the temperature sensor 3 is energized from the input voltage, and determines that the battery is a battery pack in which the temperature sensor 3 is connected to the negative electrode terminal 1. As shown in FIG. 3, in the battery pack in which the temperature sensor 3 is connected to the positive electrode terminal 1, no current flows through the temperature sensor 3 even when the switch SW1 is turned on. Therefore, no voltage drop occurs at both ends of the temperature sensor 3.
The voltage at the temperature terminal 2 becomes equal to the + side supply voltage. In this state, the switch SW1 is turned off and the switch SW2 is turned on. When switch SW2 is turned on, +
A current flows through the path of the electrode terminal 1 → the temperature sensor 3 → the electrode terminal 1 → the switch SW2 → the resistor R2. The energized temperature sensor 3 generates a voltage drop at both ends. The voltage at both ends of the temperature sensor 3 is supplied from the temperature terminal 2 to the voltage detecting means 5.
Is input to the microcomputer 9. The microcomputer 9 determines from the input voltage that the temperature sensor 3 is energized, and determines that the battery is a battery pack in which the temperature sensor 3 is connected to the positive electrode terminal 1.

The electric device according to the second aspect of the present invention can determine the type of the battery pack in the circuit shown in FIG. As shown in FIGS. 2 and 3, the type of the battery pack is such that the connection position of the temperature sensor 3 is changed to distinguish the type. The charge control circuit 10 serving as the voltage applying means 7 applies a predetermined voltage via the +/- electrode terminals 1 of the battery pack. As shown in the figure, in the battery pack in which the temperature sensor 3 is connected to the negative electrode terminal 1, the voltage of the temperature terminal 2 becomes 0V. In the battery pack in which the temperature terminal 2 is connected to the positive electrode terminal 1, the voltage of the temperature terminal 2 becomes the supply voltage. The microcomputer 9 serving as the voltage detecting means 5 and the determining means 6
The voltage of the temperature terminal 2 is detected to determine which electrode terminal 1 of the battery pack is connected to the temperature sensor 3.

Further, in the electric device according to the present invention, as shown in FIG. 4, a battery pack having a capacitor C connected in parallel with the temperature sensor 3 and a battery pack having no capacitor connected as shown in FIG. And identify. FIG.
Shows the voltage rise curves of the temperature terminal 2 of the battery pack with the capacitor C connected and the battery pack without the capacitor connected. As shown by the broken line A in this figure, in the battery pack to which the capacitor C is connected, the voltage at the temperature terminal 2 rises slowly. This is because it takes time to charge the capacitor C. In a battery pack with no capacitor connected, the voltage at the temperature terminal 2 rises steeply. As described above, the battery packs having different voltage rising curves can detect the voltage after a predetermined time (T1) to determine the presence or absence of the capacitor. FIG. 7 is a circuit diagram showing a specific example of an electric device for realizing this. The electrical device shown in this figure switches the switch SW3 from the on state to the off state,
After a certain period of time, the voltage of the temperature terminal 2 is detected. The voltage of the temperature terminal 2 is inputted to the judging means 6, and the microcomputer 9 as the judging means 6 judges the presence or absence of the capacitor from the detected voltage. To apply a voltage to the temperature terminal 2,
Is connected to a power supply via a resistor R3.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below are examples of electrical equipment for embodying the technical idea of the present invention,
The electric device of the present invention is not limited to the following. Various changes can be made to the electric device of the present invention within the scope of the claims.

Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments are indicated by the columns of "claims" and "means for solving the problems". "And" members of action ". However, the members described in the claims are not limited to the members of the embodiments.

The electric equipment shown in FIG. 1 for determining the type of battery pack determines the type of battery pack in which a temperature sensor 3 as a thermistor is connected to the temperature terminal 2 and the electrode terminal 1. As shown in FIGS. 2 and 3, the type of the battery pack is distinguished by the electrode terminal 1 to which the temperature sensor 3 is connected. For example, in the case of a battery pack having a large capacity, the temperature sensor 3 is connected to the negative electrode terminal 1 as shown in FIG. 2, and in the case of a battery pack having a small capacity, as shown in FIG. Side electrode terminal 1. The electric device detects whether the electrode terminal 1 to which the temperature sensor 3 is connected is positive or negative, and determines whether the battery pack has a large capacity or a small capacity. The type of battery, for example, a nickel cadmium battery and a nickel hydride battery, or a nickel cadmium battery and a lithium secondary battery are identified depending on which of the electrode terminals 1 is connected to the temperature sensor 3. Further, it is possible to distinguish between a nickel-metal hydride battery and a lithium secondary battery.

The electric equipment includes a charge control circuit 10 for charging the battery pack, a current supply means 4 for supplying a predetermined current to the temperature terminal 2 of the battery pack, and a predetermined current to the temperature terminal 2 by the current supply means 4. A voltage detecting means 5 for detecting an output voltage of the temperature terminal 2 in a flowing state, and a judging means 6 for arithmetically processing the voltage detected by the voltage detecting means 5 to determine the type of the battery pack.

The current supply means 4 comprises resistors R1, R2 connected in series and switches SW1, SW2. The switches SW1 and SW2 are turned on and off by the microcomputer 9 as the determination means 6. One of the switches SW1 and SW2 is turned on and the other is turned off, and the voltage of the temperature terminal 2 is detected. When the switch SW1 is turned on and the switch SW2 is turned off, power is supplied to the temperature sensor 3 connected to the negative electrode terminal 1. Conversely, when the switch SW2 is turned on and the switch SW1 is turned off, the temperature sensor 3 connected to the positive electrode terminal 1 is energized.

The voltage detecting means 5 and the judging means 6 detect the voltage of the temperature terminal 2 by turning on either the switch SW1 or the switch SW2. In the electric apparatus shown in FIG. 1, the voltage detecting means 5 and the judging means 6 are constituted by the microcomputer 9.
The microcomputer 9 incorporates, as the voltage detecting means 5, an A / D converter that converts a voltage signal input from the temperature terminal 2 into a digital value. Further, the microcomputer 9 has a built-in CPU as the judging means 6 for judging the type of the battery by calculating the output of the A / D converter.

The electric device shown in FIG. 1 determines the type of the battery pack according to the flowchart shown in FIG. [N = 1] It is determined whether the battery pack is set in the electric device. The presence or absence of a battery pack is determined by, for example,
The current is measured by passing current through the electrodes, or is determined by a signal from a limit switch or the like (not shown) pressed on the battery. [N = 2] When determining that the battery is set, the microcomputer 9 turns on the switch SW1 and turns off the switch SW2. [N = 3] The microcomputer 9 detects the voltage of the temperature terminal 2,
It is determined whether the voltage of the temperature sensor 3 has been measured. [N = 4] When the voltage of the temperature sensor 3 can be measured, it is determined that the temperature sensor 3 is a battery connected to the negative electrode terminal 1, that is, the GND side. When the switch SW1 is turned on and the temperature sensor 3 can be energized, the temperature sensor 3
Is connected to the negative electrode terminal 1. When the battery pack has the temperature sensor 3 connected to the positive electrode terminal 1, the switch SW1 is turned on and the temperature sensor 3 cannot be energized. [N = 5] When the voltage of the temperature terminal 2 cannot be measured, that is, when the voltage of the temperature terminal 2 is equal to the voltage of the positive electrode terminal 1, the temperature sensor 3 of the battery pack is connected to the positive electrode terminal 1. Have been. Therefore, the switch SW1 is turned off and the switch SW2 is turned on, so that the temperature sensor 3 can be energized. [N = 6] The battery pack that can turn on the switch SW1 and turn on the switch SW2 to energize the temperature sensor 3 is one in which the temperature sensor 3 is connected to the positive electrode terminal 1, that is, + V. [N = 7] The microcomputer 9 determines the electrode terminal 1 to which the temperature sensor 3 is connected, and determines the type of the battery pack.
The microcomputer 9 having determined the type sets a total timer for charging the battery pack. The setting time of the total timer is adjusted to an optimum time for the type of the battery pack. For example, when rapidly charging large and small battery packs with almost the same charging current, large battery packs increase the total timer setting time, and small battery packs
Reduce the total timer setting time. [N = 8] After the microcomputer 9 determines the type of battery pack, the battery pack is charged under optimal conditions. When charging the battery pack, the microcomputer 9 calculates a signal from the temperature sensor 3 to control the state of charge. Therefore, when the battery pack is charged, the switch SW1 or the switch S
One of W2 is turned on to energize the temperature sensor 3. The microcomputer 9 controls the charge control circuit 10 to stop charging when the battery pack is fully charged.

In the above-described electric equipment, the temperature terminal 2 is energized to determine whether the electrode terminal 1 connected to the temperature sensor 3 is positive or negative. As described above, the electric device that detects the electrode terminal 1 that is connected to the temperature sensor 3 by energizing the electrode terminal 1 does not necessarily need to apply a voltage to both the positive and negative electrode terminals 1. For this reason, when no voltage is applied to the battery, the temperature sensor 3
Can be identified. When energizing the temperature sensor 3, one of the electrode terminals 1 may be connected to a +-power supply. When the switch SW1 is turned on, the negative electrode terminal 1 is connected to the power supply, and when the switch SW2 is turned on, the positive electrode terminal 1 is connected to the power supply, so that the temperature sensor 3 can be energized.

The electric equipment does not apply a voltage to the temperature terminal 2 but applies a voltage to the +-
Can be determined to which electrode terminal 1 is connected. This is because one of the temperature sensors 3 is connected to the +-electrode terminal 1. As shown in FIG. 2, in the battery pack in which the temperature sensor 3 is connected to the negative side, when a voltage is applied to the +-electrode terminal 1, the voltage of the temperature terminal 2 becomes 0V. As shown in FIG. 3, in the battery pack in which the temperature terminal 2 is connected to the positive electrode terminal 1, when a voltage is applied to the positive electrode terminal 1, the voltage of the temperature terminal 2 becomes the power supply voltage. Therefore, by measuring the voltage of the temperature terminal 2, it is possible to determine which of the + and − electrode terminals 1 the temperature sensor 3 is connected to.

As described above, an electric device for identifying the electrode terminal 1 to which the temperature sensor 3 is connected without applying a voltage to the temperature terminal 2 can be realized by the circuit shown in FIG. However, in FIG. 1, the current supply means 4 is not required to identify the type of battery. An electric device for identifying a type by applying a voltage to the electrode terminal 1 includes a voltage applying means 7 for applying a predetermined voltage to the +-electrode terminal 1, and a voltage applied to the electrode terminal 1 by the voltage applying means 7 to control the temperature. It can be composed of voltage detecting means 5 for detecting the output voltage of the terminal 2 and determining means 6 for calculating the voltage detected by the voltage detecting means 5 to determine the type of battery pack.

The electric device shown in FIG.
Can be used together with the voltage applying means 7. The charge control circuit 10 includes a switching element. The switching element is controlled by the microcomputer 9. When the switching element is turned on, a voltage is applied to the electrode terminal 1 of the battery pack via the electrode terminal 1.

The voltage detecting means 5 and the judging means 6 are constituted by a microcomputer 9. The microcomputer 9 detects the voltage of the temperature terminal 2 in a state in which a voltage is applied to the positive and negative electrode terminals 1 of the battery pack, and determines whether the temperature sensor 3 is connected to any of the positive and negative electrode terminals 1. It is determined whether there is. Microcomputer 9
However, when determining the type of the battery pack, the current supply means 4 for applying a voltage to the temperature terminal 2 is not required. Therefore, the switches SW1 and SW2 of the current supply means 4
Is turned off, and the battery type can be determined.

The electric device shown in FIG. 7 distinguishes between a battery pack with a capacitor C and a battery pack without a capacitor, as shown in FIGS. 4 and 5. The electric device shown in FIG. 1 has an energizing means 8 for applying a predetermined current to the + and-electrode terminals 1, and a voltage for detecting the output voltage of the temperature terminal 2 after a predetermined time after energizing the electrode terminals 1 by the energizing means 8. Detecting means 5
And a judging means 6 for calculating the voltage detected by the voltage detecting means 5 to judge the type of the battery pack.

The energizing means 8 comprises a resistor R3 and a switch SW3 connected in series with each other. The resistor R3 is connected to the electrode terminal 1 and the + side of the power supply. Switch SW3
Is connected between the temperature terminal 2 and GND. The resistor R3 energizes the capacitor C from the moment the switch SW3 is turned off, and starts charging. The value of the resistor R3 determines the charging current of the capacitor C. When the resistance R3 is small, the charging current is large, and when the resistance R3 is large, the charging current is small. The voltage across capacitor C rises as it charges. This is because the voltage of the capacitor C is proportional to the charge of the capacitor C.

The voltage at the temperature terminal 2 of the battery pack to which the capacitor C is connected gradually rises as shown by the broken line A in FIG. This is because it takes time to charge the capacitor C. The temperature terminal 2 of the battery pack to which no capacitor is connected rises sharply as shown by the solid line B in FIG. Therefore, after a lapse of a predetermined time (T1), the voltage of the temperature terminal 2 is measured, and the presence or absence of a capacitor, that is,
Battery type can be determined.

The voltage detecting means 5 and the judging means 6 are constituted by a microcomputer 9 like the electric equipment shown in FIG.
The microcomputer 9 has a built-in timer. The timer starts counting when the temperature terminal 2 is energized, that is, when charging of the capacitor C is started. When the timer finishes counting, the microcomputer 9 measures the voltage of the temperature terminal 2 to determine the presence or absence of a capacitor. Further, the microcomputer 9 controls the switch SW3 to be turned on and off.

The electric device shown in this figure determines the type of the battery according to the flowchart shown in FIG. [N = 1] It is determined whether or not the battery pack is set in the electric device. The presence or absence of a battery pack is determined by, for example,
The current is measured by passing current through the electrodes, or is determined by a signal from a limit switch or the like (not shown) pressed on the battery. At this time, the switch SW3 is kept on. [N = 2] When determining that the battery is set, the microcomputer 9 switches the switch SW3 from ON to OFF. [N = 3] When the switch SW3 is turned off, the microcomputer 9
Starts counting. When the set time T1 has elapsed, the process proceeds to the next step. [N = 4] The microcomputer 9 measures the voltage of the temperature terminal 2 to determine the presence or absence of a capacitor. A battery pack with a capacitor C has a lower measured voltage, and a battery pack without a capacitor has a higher measured voltage. Therefore, the microcomputer 9 determines the presence or absence of a capacitor from the measured voltage. [N = 5] The microcomputer 9 that determines the type sets a total timer for charging the battery pack. The setting time of the total timer is adjusted to an optimum time for the type of the battery pack. For example, when rapidly charging large and small battery packs with substantially the same charging current, a large capacity battery pack increases the total timer setting time, and a small capacity battery pack shortens the total timer setting time. [N = 6] After the microcomputer 9 determines the type of the battery pack, the battery pack is rapidly charged under optimum conditions. When charging the battery pack, the microcomputer 9 calculates a signal from the temperature sensor 3 to control the state of charge. Therefore, when charging the battery pack, the switch SW3 is turned on to energize the temperature sensor 3. The microcomputer 9 controls the charge control circuit 10 by measuring the voltage of the battery, and stops charging when the battery pack is fully charged.

As shown in FIGS. 2 and 3, the above-mentioned electric equipment changes the connection of the temperature sensor 3 to distinguish the type of the battery pack, and as shown in FIGS.
The type of battery pack can be distinguished by the presence or absence of the battery.
When the battery pack is distinguished by combining the connection of the temperature sensor 3 and the presence or absence of the condenser, the battery pack can be classified into the following four types.

Electrode terminal for connecting temperature sensor Presence or absence of capacitor Type 1 (FIG. 2)-No electrode terminal 1 Type 2 (FIG. 3) + Electrode terminal 1 No Type 3 (FIG. 4)-Electrode terminal 1 Yes Type 4 (FIG. 4) (Not shown) + electrode terminal 1

The electric equipment shown in the circuit diagram of FIG.
The type of battery pack can be identified. The electric device shown in this figure determines the electrode terminal 1 to which the temperature sensor 3 is connected as described above. In addition, the presence or absence of a capacitor is determined by measuring the voltage after a certain period of time has passed by energizing the temperature terminal 2. When determining the presence or absence of a capacitor, one of the switches SW1 and SW2 is turned on to charge the capacitor C. Before charging the capacitor C, the switch SW1 and the switch SW2 are turned on to discharge the capacitor C.

As described above, the electric equipment for distinguishing four types of battery packs, for example, distinguishes a nickel cadmium battery and a lithium secondary battery at the electrode terminal 1 to which the temperature sensor 3 is connected, and determines whether the battery pack is present or not. The capacity of the battery can be identified.

[0037]

The electric device for discriminating the type of a battery pack according to the present invention has a feature that the battery type can be identified with an extremely simple circuit configuration. This is because the electric device of the present invention identifies the type by using the temperature terminals of the battery pack together for identification of the type. The electric device of the present invention detects the voltage of the temperature terminal for detecting the temperature of the battery and identifies the type. Therefore, unlike the conventional case, a dedicated terminal for identifying the type of battery is not required, and the type can be identified by a simple circuit configuration. Furthermore, the electric device of the present invention measures the voltage of the temperature terminal to determine the polarity of + or-connected to the temperature sensor, or determines the presence or absence of the capacitor by measuring the voltage of the temperature terminal after a predetermined time. To identify the type of battery pack. Therefore, the electric device of the present invention
It has the feature that the type of battery pack can be accurately identified with a simple circuit.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an example of an electric device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram of a battery pack identified by type in the electric device of the present invention.

FIG. 3 is a circuit diagram of a battery pack identified by type in the electric device of the present invention.

FIG. 4 is a circuit diagram of a battery pack identified by type in the electric device of the present invention.

FIG. 5 is a circuit diagram of a battery pack identified by type in the electric device of the present invention.

FIG. 6 is a graph showing a curve in which the voltage of the temperature terminal of the battery pack shown in FIGS. 5 and 6 rises;

FIG. 7 is a circuit diagram of an electric device for identifying the type of the battery pack shown in FIGS. 4 and 5;

FIG. 8 is a flowchart showing a process in which the electric device shown in FIG. 1 identifies the battery pack shown in FIGS. 2 and 3;

9 is a flowchart showing a process in which the electric device shown in FIG. 7 identifies the battery pack shown in FIGS. 4 and 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Electrode terminal 2 ... Temperature terminal 3 ... Temperature sensor 4 ... Current supply means 5 ... Voltage detection means 6 ... Determination means 7 ... Voltage application means 8 ... Electrification means 9 ... Microcomputer 10 ... Charge control circuit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01M 10/42-10/48 H01M 2/10 H02J ⁷ /00-7/12

Claims (3)

(57) [Claims] 1. A battery, a positive electrode terminal (1) and a temperature terminal (2).
Temperature sensors (2) and electrode terminals (1)
An electric device for determining the type of battery pack to which (3) is connected, and a current supply means for flowing a predetermined current from the battery to the temperature terminal (2).
(4) and voltage detecting means for detecting the output voltage of the temperature terminal (2) in a state where the current supply means (4) is energized to the temperature terminal (2).
(5) An electric device for judging the type of a battery pack, comprising: a judging means (6) for arithmetically processing the voltage detected by the voltage detecting means (5) to judge the type of the battery pack. . 2. A type of battery pack having a positive electrode terminal (1) and a temperature terminal (2), wherein a temperature sensor (3) is connected to the temperature terminal (2) and the electrode terminal (1). A voltage application means (7) for applying a predetermined voltage to the positive and negative electrode terminals (1), and a voltage applied to the electrode terminals (1) by the voltage application means (7). Voltage detecting means (5) for detecting the output voltage of the temperature terminal (2), and determining means (6) for arithmetically processing the voltage detected by the voltage detecting means (5) to determine the type of battery pack. An electric device for determining a type of a battery pack, comprising: And a temperature sensor (3) connected to the temperature terminal (2) and the electrode terminal (1). 3. A battery, a positive electrode terminal (1), a temperature terminal (2), and a temperature sensor (3) connected to the temperature terminal (2) and the electrode terminal (1). A first battery pack, a battery, plus and minus electrode terminals (1), a temperature terminal (2), and a temperature terminal
(2) An electric device for judging the type of a second battery pack having a temperature sensor (3) connected to an electrode terminal (1) and a capacitor, and a positive electrode terminal (1) Energizing means (8) for passing a predetermined current to the
Voltage detecting means (5) for detecting the voltage of the temperature terminal (2) after a predetermined time by energizing the electrode terminal (1 ) with the energizing means (8)
And a determining means (6) for performing arithmetic processing on the voltage detected by the voltage detecting means (5) to determine the type of the first battery pack and the second battery pack. Electrical equipment to determine the type of