JP6039344B2 - Leak processing device and battery power supply device - Google Patents

Description

  The present invention relates to a leak processing apparatus for coping with a leak failure occurring in a circuit, and a battery power supply apparatus using the leak processing apparatus.

  Conventionally, in the circuit of a battery-powered power supply device, when an open failure that causes a disconnection of a conductive path or an open part occurs, the occurrence of such a failure is detected and the effect of the open failure is taken into consideration. A technique for dealing with an open failure by correcting a measured value of the battery voltage is known (for example, see Patent Document 1).

JP 2009-195035 A

  By the way, the failure mode of the circuit is not limited to the open failure. For example, a capacitor may be connected in parallel with the battery for the purpose of noise removal. Alternatively, a protection element may be connected in parallel with the battery for the purpose of circuit protection.

  In such a case, when the capacitor or the protection element is half short-circuited, the battery discharge current leaks (leaks) through these circuit elements. In addition, for example, due to the influence of dew condensation or carbonization, the insulation resistance between the wirings connected to both electrodes of the battery may be reduced, causing a leak failure.

  However, since the above-described background art only assumes an open failure, there is an inconvenience that a leak failure cannot be dealt with.

  The objective of this invention is providing the leak processing apparatus which can cope with a leak failure, and a battery power supply device using the same.

  A leak treatment apparatus according to the present invention includes a first resistor having one end connected to one pole of a first battery, a first conductive path connected to the other end of the first resistor, and the other of the first battery. A connection resistor having one end connected to the pole, a connection conductive path connected to the other end of the connection resistance, and a first voltage detection unit that detects a voltage between the first conductive path and the connection conductive path A first discharge part capable of switching between an on state in which a predetermined reference current flows between the first conductive path and the connection conductive path and an off state in which the reference current does not flow, and the first discharge part The voltage detected by the first voltage detection unit when the first discharge unit is turned off is acquired as the first off voltage, and is detected by the first voltage detection unit when the first discharge unit is turned on. An on / off voltage acquisition unit for acquiring the obtained voltage as a first on voltage; and the first off voltage A leak for calculating at least one of a resistance value between the first conductive path and the connection conductive path and a first battery voltage that is a battery voltage of the first battery based on the pressure and the first on-voltage. An information calculation unit.

  According to this configuration, the first off voltage and the first on voltage change depending on whether or not a leak failure has occurred between the first conductive path and the connection conductive path. Therefore, based on the first off-voltage and the first on-voltage, the resistance value between the first conductive path and the connection conductive path and the battery voltage of the original first battery excluding the influence of the leakage failure are the first. One battery voltage can be calculated. Therefore, by calculating at least one of the resistance value between the first conductive path and the connection conductive path and the first battery voltage based on the first off voltage and the first on voltage by the leak information calculation unit. Can deal with leak failure.

  The leak information calculation unit calculates a resistance value between the first conductive path and the connection conductive path as a first leak resistance value based on the first off voltage and the first on voltage. It is preferable to include a leak resistance calculation unit.

  According to this configuration, the leak information calculation unit calculates the resistance value between the first conductive path and the connection conductive path based on the first off voltage and the first on voltage by the leak resistance calculation unit. It can be calculated as a resistance value.

Further, it is preferable that the leakage resistance calculation unit calculates the first leakage resistance value rv (1) based on the following formula (A).
rv (1) = {2R (Vm (1) off-Vm (1) on)} / {2IcR- (Vm (1) off-Vm (1) on)} (A)
However,
Vm (1) on: the first on voltage Vm (1) off: the first off voltage R: the resistance value Ic of the first resistor and the connection resistance: the current value of the reference current.

  According to this configuration, the leak resistance calculation unit can easily calculate the first leak resistance value based on the first off voltage and the first on voltage using the equation (A).

  The leak information calculation unit may calculate the first battery voltage based on the first leak resistance value calculated based on the first off voltage and the first on voltage and the first off voltage. It is preferable that the battery voltage calculation part to calculate is further included.

  According to this configuration, the leak information calculation unit is the battery voltage of the original first battery excluding the influence of the leak failure based on the first leak resistance value and the first off voltage by the battery voltage calculation unit. The first battery voltage can be calculated.

Moreover, it is preferable that the said battery voltage calculation part calculates said 1st battery voltage Vb (1) based on the following formula | equation (B).
Vb (1) = {(2R / rv (1)) + 1} × Vm (1) off (B)
However,
Vm (1) off: the first off voltage rv (1): the first leakage resistance value R: the resistance value of the first resistance and the connection resistance.

  According to this configuration, the battery voltage calculation unit can easily calculate the first battery voltage using the formula (B) based on the first leakage resistance value and the first off voltage.

  The leak information calculation unit may include a battery voltage calculation unit that calculates the first battery voltage based on the first off voltage and the first on voltage.

  According to this configuration, the leak information calculation unit is the battery voltage of the original first battery excluding the influence of the leak failure based on the first off voltage and the first on voltage by the battery voltage calculation unit. One battery voltage can be calculated.

Moreover, it is preferable that the said battery voltage calculation part calculates said 1st battery voltage Vb (1) based on the following formula | equation (C).
Vb (1) = 2IcR × Vm (1) off / (Vm (1) off−Vm (1) on) (C)
However,
Vm (1) on: the first on voltage Vm (1) off: the first off voltage R: the resistance value Ic of the first resistor and the connection resistance: the current value of the reference current.

  According to this configuration, the battery voltage calculation unit can easily calculate the first battery voltage using the formula (C) based on the first off voltage and the first on voltage.

  In addition, the first battery and the second battery are connected in series, a second resistor having one end connected to a pole of the second battery different from the pole connected to the first battery, and the second battery A second conductive path connected to the other end of the two resistors, a second voltage detector for detecting a voltage between the second conductive path and the first conductive path, the second conductive path and the first A second discharge unit capable of switching between an on state in which the reference current flows between the conductive path and an off state in which the reference current does not flow, and the on / off voltage acquisition unit further includes the second discharge unit The voltage detected by the second voltage detector when the battery is turned off is acquired as the second off voltage, and is detected by the second voltage detector when the second discharge part is turned on. The battery voltage calculation unit obtains the second off voltage as the second on voltage. Based on said a pressure second on-voltage, it is preferable to further calculate the second battery voltage is a battery voltage of the second battery.

  According to this configuration, the first battery and the second battery are connected in series, the second resistor having one end connected to a pole of the second battery that is different from the pole connected to the first battery, In a configuration including a second conductive path connected to the other end of the two resistors, and a second voltage detection unit that detects a voltage between the second conductive path and the first conductive path, the battery voltage calculation unit Based on the second off voltage and the second on voltage, it is possible to further calculate the second battery voltage that is the original battery voltage of the second battery excluding the influence of the leak failure.

Further, it is preferable that the battery voltage calculation unit calculates the first battery voltage Vb (1) based on the following formula (D) when the first leakage resistance value becomes a negative value.
Vb (1) = Vm (1) off- [Vb (2) × {IcR- (Vm (1) on-Vm (1) off)} / (2IcR)] (D)
However,
Vm (1) on: the first on voltage Vm (1) off: the first off voltage Vb (2): the second battery voltage R: the resistance of the first resistance, the second resistance, and the connection resistance Value Ic: current value of the reference current.

  When the first leak resistance value becomes a negative value, it is considered that a leak failure has occurred in an adjacent circuit. In this case, the first battery voltage cannot be calculated based on the formula (C). Therefore, when the first leakage resistance value becomes a negative value, the battery voltage calculation unit can calculate the first battery voltage Vb (1) by using Expression (D).

  Further, when the first leak resistance value does not satisfy a preset determination value and the first leak resistance value becomes a positive value, the first leak resistance value is between the first conductive path and the connection conductive path. When it is determined that there is a leak failure, the first leakage resistance value is less than the determination value, and the first leakage resistance value is a negative value, the second conductive path and the first conductive path It is preferable to further include a determination unit that determines that there is a leak failure between.

  According to this configuration, it is possible to determine whether there is a leak failure between the first conductive path and the connection conductive path and between the second conductive path and the first conductive path based on the first leak resistance value. Therefore, it is possible to determine in detail the occurrence status of the leak failure.

  Further, the battery voltage calculation unit, when the determination unit determines that there is a leak failure between the first conductive path and the connection conductive path, the second off voltage, the second on voltage, Preferably, the second battery voltage is calculated based on the first battery voltage.

  When there is a leak failure between the first conductive path and the connection conductive path that are adjacent to the second battery, the second off voltage and the second on voltage are affected by the leak fault of the adjacent circuit. If the second battery voltage is calculated based on the second off voltage and the second on voltage, the calculation accuracy of the second battery voltage decreases. Therefore, according to this configuration, when there is a leak failure between the first conductive path and the connection conductive path, the second battery is based on the first battery voltage in addition to the second off voltage and the second on voltage. By calculating the voltage, the calculation accuracy of the second battery voltage is improved.

Further, when the determination unit determines that there is a leak failure between the first conductive path and the connection conductive path, the battery voltage calculation unit is configured to calculate the second voltage based on the following formula (E). It is preferable to calculate the battery voltage Vb (2).
Vb (2) = Vm (2) off-Vb (1) * [{2IcR- (Vm (2) off-Vm (2) on)} / (IcR)] (E)
However,
Vm (2) on: the second on voltage Vm (2) off: the second off voltage Vb (1): the first battery voltage R: the resistance of the first resistance, the second resistance, and the connection resistance Value Ic: current value of the reference current.

  According to this configuration, when it is determined that there is a leak failure between the first conductive path and the connection conductive path, the battery voltage calculation unit accurately uses the expression (E) to accurately calculate the second battery voltage Vb. (2) can be calculated.

  In addition, when the determination unit determines that there is a leakage failure between the first conductive path and the connection conductive path, the first conductive path is based on the second off voltage and the second on voltage. When the resistance value between the first conductive resistance value and the connection conductive path is calculated as a first calculated resistance value, and the first calculated resistance value and the first leak resistance value are not substantially equal, a plurality of leak failures have occurred. Is preferably determined.

  If there is one leak failure, the first leak resistance value calculated based on the first off voltage and the first on voltage, the first value calculated based on the second off voltage, and the second on voltage. The calculated resistance value should be substantially equal. Therefore, according to this configuration, the determination unit can determine that a plurality of leak failures have occurred when the first calculation resistance value and the first leak resistance value are not substantially equal.

Moreover, it is preferable that the determination unit calculates the first calculation resistance value rc (1) based on the following formula (F).
rc (1) = [{-3IcR + 2 (Vm (2) off-Vm (2) on)} / {2IcR- (Vm (2) off-Vm (2) on)}] * R (F)
However,
Vm (2) on: the second on voltage Vm (2) off: the second off voltage R: the resistance value Ic of the first resistor, the second resistor, and the connection resistor: the current value of the reference current.

  According to this structure, the determination part can calculate a 1st calculation resistance value based on a 2nd off voltage and a 2nd on voltage by using Formula (F).

  In addition, it is preferable that the battery voltage calculation unit does not calculate the second battery voltage when the determination unit determines that a plurality of leak failures have occurred.

  According to this configuration, when the second battery voltage cannot be accurately calculated due to a plurality of leak failures, the battery voltage calculation unit does not calculate the second battery voltage, so that the erroneous second battery The possibility that the voltage is calculated is reduced.

  In addition, a battery power supply device according to the present invention includes the above-described leak processing device and the first battery.

  Moreover, the battery power supply device according to the present invention includes the above-described leak processing device, the first battery, and the second battery.

  According to these configurations, the same effect as the above-described leak processing apparatus can be obtained.

  Based on the first off voltage and the first on voltage, the leakage processing device and the battery power supply device having such a configuration can affect the resistance value between the first conductive path and the connection conductive path and the influence of the leak failure. It becomes possible to calculate the first battery voltage, which is the original battery voltage of the first battery removed. Therefore, by calculating at least one of the resistance value between the first conductive path and the connection conductive path and the first battery voltage based on the first off voltage and the first on voltage by the leak information calculation unit. Can deal with leak failure.

It is a block diagram which shows an example of a structure of the battery power supply device using the leak processing apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows an example of operation | movement of the battery power supply device shown in FIG. It is a flowchart which shows an example of operation | movement of the battery power supply device shown in FIG. It is a flowchart which shows an example of operation | movement of the battery power supply device shown in FIG. It is a circuit diagram which shows the model circuit for demonstrating the derivation method of Formula (1) and Formula (2). It is a circuit diagram which shows the model circuit for demonstrating the derivation method of Formula (3)-Formula (7). It is explanatory drawing for demonstrating the relationship of Formula (III-rv), Formula (III-Vb), Formula (Vr), Formula (V-Vb), and Formula (VI-Vb).

  Embodiments according to the present invention will be described below with reference to the drawings. In addition, the structure which attached | subjected the same code | symbol in each figure shows that it is the same structure, The description is abbreviate | omitted. FIG. 1 is a block diagram showing an example of the configuration of a battery power supply device using a leak processing apparatus according to an embodiment of the present invention.

  A battery power supply device 1 shown in FIG. 1 includes a leak processing device 2, an assembled battery 3, and connection terminals 11, 12, and 13. The assembled battery 3 includes, for example, n batteries B1, B2, B3,..., Bn connected in series in the same polarity direction. Hereinafter, the batteries B1 to Bn are collectively referred to as a battery B.

  The battery B is a secondary battery such as a Ni-MH battery or a Li-ion battery. Each of the batteries B1 to Bn may be a single cell or a battery block in which a plurality of cells are combined.

  The connection terminals 11, 12, and 13 are connection terminals for connecting to an external device (not shown). The external device is, for example, a charging device that charges the assembled battery 3 or a load circuit that operates by receiving power supply from the assembled battery 3. The external device may be, for example, an electronic device such as a portable personal computer, a digital camera, or a mobile phone, or a main body part of a battery-equipped device system such as a vehicle such as an electric vehicle or a hybrid car. For example, a power generation device such as a solar power generation device or a wind power generation device may be used.

  The connection terminal 11 is connected to the positive electrode of the assembled battery 3, that is, the positive electrode of the battery Bn. A connection terminal 12 is connected to the negative electrode of the assembled battery 3, that is, the negative electrode of the battery B1. The connection terminal 13 is a connection terminal for communication.

  The battery power supply device 1 charges and discharges the assembled battery 3 through the connection terminals 11 and 12 by being connected to the external device as described above through the connection terminals 11, 12, and 13. Further, the battery power supply device 1 is configured to transmit information indicating the battery voltages Vb (1) to Vb (n) of the batteries B1 to Bn and information related to a leak failure to an external device via the connection terminal 13. Yes.

  The leak processing apparatus 2 includes a control unit 21, voltage detection units U1 to Un, a communication IF (interface) 24, resistors R0 to Rn, capacitors C1 to Cn, and discharge units D1 to Dn. The discharge part D1 (first discharge part) is a series circuit of a constant current source PS1 and a switching element SW1. The discharge part D2 (second discharge part) is a series circuit of the constant current source PS2 and the switching element SW2. Hereinafter, similarly, the discharge part Dn is a series circuit of the constant current source PSn and the switching element SWn.

   Hereinafter, the voltage detection units U1 to Un, the capacitors C1 to Cn, the discharge units D1 to Dn, the constant current sources PS1 to PSn, and the switching elements SW1 to SWn are collectively referred to as the voltage detection unit U, the capacitor C, and the discharge unit D, respectively. , Constant current source PS, and switching element SW.

  The negative electrode of the battery B1 (first battery) is connected to one end of the resistor R0 (connection resistor). The other end of the resistor R0 is connected to the voltage detection unit U1 via a conductive path L (0) (connection conductive path). A connection point P1 between the positive electrode of the battery B1 and the negative electrode of the battery B2 (second battery) is connected to one end of the resistor R1 (first resistor). The other end of the resistor R1 is connected to a voltage detection unit U1 (first voltage detection unit) and a voltage detection unit U2 (second voltage detection unit) via a conductive path L (1) (first conductive path). Yes.

  Further, a connection point P2 between the positive electrode of the battery B2 and the negative electrode of the battery B3 is connected to one end of the resistor R2 (second resistor). The other end of the resistor R2 is connected to the voltage detection units U2 and U3 via a conductive path L (2) (second conductive path).

  Similarly, a connection point Pn-1 between the positive electrode of the battery Bn-1 and the negative electrode of the battery Bn is connected to one end of the resistor Rn-1. The other end of the resistor Rn-1 is connected to the voltage detection units Un-2 and Un-1 via a conductive path L (n-1). The positive electrode of the battery Bn is connected to one end of the resistor Rn. The other end of the resistor Rn is connected to the voltage detector Un through a conductive path L (n).

  One end of the capacitor C1 is connected to the conductive path L (0), and the other end of the capacitor C1 is connected to the conductive path L (1). One end of the capacitor C2 is connected to the conductive path L (1), and the other end of the capacitor C2 is connected to the conductive path L (2). One end of the capacitor C3 is connected to the conductive path L (2), and the other end of the capacitor C3 is connected to the conductive path L (3). Similarly, one end of the capacitor Cn is connected to the conductive path L (n-1), and the other end of the capacitor Cn is connected to the conductive path L (n).

  The conductive path L (0) is connected to the conductive path L (1) through the discharge part D1. The conductive path L (1) is connected to the conductive path L (2) through the discharge part D2. The conductive path L (2) is connected to the conductive path L (3) through the discharge part D3. Similarly, the conductive path L (n-1) is connected to the conductive path L (n) through the discharge part Dn.

  The batteries B1, B2, the resistor R0, the resistor R1, the conductive path L (0), the conductive path L (1), the discharge part D1, the discharge part D2, the voltage detection part U1, and the voltage detection part U2 are claimed respectively. Corresponding to the first and second batteries, connection resistance, first resistance, connection conductive path, first conductive path, first discharge unit, second discharge unit, first voltage detection unit, and second voltage detection unit For example, when the battery Bn-1 is the first battery and the battery Bn is the second battery, the resistor Rn-2, the resistor Rn-1, the conductive path L (n-2), the conductive path L (n- 1), the discharge part Dn-1, the discharge part Dn, the voltage detection part Un-1, and the voltage detection part Un are respectively a connection resistance, a first resistance, a connection conductive path, a first conductive path, and a first discharge in the claims. , A second discharge unit, a first voltage detection unit, and a second voltage detection unit.

  Alternatively, the battery Bn is the first battery and the battery Bn-1 is the second battery, and the resistor Rn, the resistor Rn-1, the conductive path L (n), the conductive path L (n-1), the discharge part Dn, and the discharge part Dn. -1, voltage detection unit Un, and voltage detection unit Un-1, respectively, are connected resistance, first resistance, connection conductive path, first conductive path, first discharge part, second discharge part, first voltage in the claims. You may make it respond | correspond to a detection part and a 2nd voltage detection part.

  Each of the voltage detection units U1 to Un is configured by using a voltage detection circuit such as an analog-digital converter, for example. The voltage detection unit U1 detects a voltage between the conductive path L (0) and the conductive path L (1) as a detection voltage Vm (1). The voltage detection unit U2 detects a voltage between the conductive path L (1) and the conductive path L (2) as a detection voltage Vm (2). The voltage detection unit U3 detects a voltage between the conductive path L (2) and the conductive path L (3) as a detection voltage Vm (3). Similarly, the voltage detection unit Un detects the voltage between the conductive path L (n-1) and the conductive path L (n) as the detection voltage Vm (n).

  The resistors R0 to Rn and the capacitors C1 to Cn constitute a filter circuit. The resistors R0 to Rn and the capacitors C1 to Cn remove high frequency noise components from the battery voltages Vb (1) to Vb (n).

  The switching elements SW1 to SWn are composed of transistors such as FETs (Field Effect Transistors) and relay switches, for example. The switching elements SW1 to SWn are turned on and off in response to control signals from the control unit 21, respectively.

  The constant current sources PS1 to PSn are constant current circuits that flow a reference current having a predetermined reference current value Ic. A resistor having a preset reference resistance value may be used instead of the constant current sources PS1 to PSn.

  The discharge units D1 to Dn are turned on so that the reference current having the reference current value Ic flows between the corresponding conductive paths when the switching elements SW1 to SWn are turned on. When the switching elements SW1 to SWn are turned off, the reference currents are discharged. It will be in the off state that does not flow.

  The discharge units D1 to Dn do not include the switching elements SW1 to SWn, and the constant current sources PS1 to PSn are in an on state in which the reference current of the reference current value Ic flows according to the control signal from the control unit 21, respectively. It is good also as a structure switched to the OFF state which does not flow a reference current.

  The control unit 21 includes, for example, a CPU (Central Processing Unit) that executes predetermined arithmetic processing, a ROM (Read Only Memory) that stores a predetermined control program, and a RAM (Random Access Memory) that temporarily stores data. And these peripheral circuits and the like.

  And the control part 21 functions as the on-off voltage acquisition part 211, the leak information calculation part 212, and the determination part 215 by executing the control program memorize | stored in ROM. The leak information calculation unit 212 includes a leak resistance calculation unit 213 and a battery voltage calculation unit 214.

  The on / off voltage acquisition unit 211 converts the detection voltages Vm (1) to Vm (n) detected by the voltage detection units U1 to Un into the off voltage Vm (1) off with the switching elements SW1 to SWn turned off. Obtained as ~ Vm (n) off. In addition, the on / off voltage acquisition unit 211 converts the detection voltages Vm (1) to Vm (n) detected by the voltage detection units U1 to Un into the on voltage Vm (1) while the switching elements SW1 to SWn are turned on. ) On to Vm (n) on.

  The leak resistance calculation unit 213 corresponds to each of the on-off voltage Vm (1) off to Vm (n) off and the on-voltage Vm (1) on to Vm (n) on acquired by the on / off voltage acquisition unit 211. Leakage resistance values rv (1) to rv (n) that are resistance values between the conductive paths are calculated.

  The battery voltage calculation unit 214 responds based on the off voltages Vm (1) off to Vm (n) off and the on voltages Vm (1) on to Vm (n) on acquired by the on / off voltage acquisition unit 211, respectively. Battery voltages Vb (1) to Vb (n) of the battery B are calculated.

  The determination unit 215 determines the presence or absence of a leak failure based on the leak resistance values rv (1) to rv (n) calculated by the leak resistance calculation unit 213.

  The communication IF 24 is, for example, information indicating the battery voltages Vb (1) to Vb (n) calculated by the battery voltage calculator 214, or the leak resistance values rv (1) to rv (n) calculated by the leak resistance calculator 213. ) And the like, which is a communication interface circuit that transmits information related to a leak failure to an external device via the connection terminal 13.

  Next, the operation of the battery power supply device 1 shown in FIG. 1 will be described. 2, 3, and 4 are flowcharts illustrating an example of the operation of the battery power supply device 1. First, the on / off voltage acquisition unit 211 assigns 1 to a variable i as an initial process (step S1).

  Next, the on / off voltage acquisition unit 211 acquires, as the off voltage Vm (1) off, the detection voltage Vm (1) detected by the voltage detection unit U1 with the switching element SW1 turned off (step S2). .

  Next, the on / off voltage acquisition unit 211 turns on the switching element SW1 and applies the detection voltage Vm (1) detected by the voltage detection unit U1 in a state where the current of the reference current value Ic is caused to flow by the constant current source PS1. And obtained as an on-voltage Vm (1) on (step S3). After acquiring the on-voltage Vm (1) on, the on-off voltage acquiring unit 211 turns off the switching element SW1.

  Next, the leak resistance calculation unit 213 calculates the leak resistance value rv based on the off voltage Vm (1) off, the on voltage Vm (1) on acquired by the on / off voltage acquisition unit 211, and the following equation (1). (1) is calculated (step S4). Expression (1) corresponds to expression (A) in the claims.

rv (1) = {2R (Vm (1) off-Vm (1) on)} / {2IcR- (Vm (1) off-Vm (1) on)} (1)
However,
R: resistance value of resistors R0 to Rn Ic: reference current value Ic.

  When the discharge units D1 to Dn are series circuits of switching elements SW1 to SWn and a reference resistance, the leak resistance calculation unit 213 sets the on voltages Vm (1) on to Vm (n) on in advance. The corresponding reference current value Ic may be calculated by dividing by the resistance value of the reference resistance.

  Next, the determination unit 215 compares the leak resistance value rv (1) calculated by the leak resistance calculation unit 213 with a predetermined determination value Ra (step S5).

  The determination value Ra is set to a sufficiently large resistance value. For example, even if the capacitors C1 to Cn and the protective elements (not shown) are short-circuited to cause leakage between the conductive paths, the battery voltage Vb generated when the resistance value of the leakage resistance is the determination value Ra. (1) to Vb (n) detection error, that is, the difference between the battery voltage Vb (1) to Vb (n) and the off voltage Vm (1) off to Vm (n) off has a resistance value that can be ignored. The value is set as the determination value Ra.

  Specifically, for example, when the resistance value R is 10 kΩ, the determination value Ra is set to about 1 MΩ to 10 MΩ, for example.

  If the leak resistance value rv (1) is equal to or greater than the determination value Ra (YES in step S5), the determination unit 215 has no leakage failure between the conductive paths L (0) and L (1), and the conductive path It is determined that there is no leak failure between L (1) and L (2) (step S6).

  In this case, since the voltage detector U1 can correctly detect the battery voltage Vb (1) of the battery B1, the battery voltage calculator 214 uses the off voltage Vm (1) off detected by the voltage detector U1. The battery voltage Vb (1) is acquired (step S7), and the process proceeds to step S21.

  On the other hand, when the leak resistance value rv (1) is less than the determination value Ra in step S5 (NO in step S5), the determination unit 215 compares the leak resistance value rv (1) with 0 (step S8). . If the leak resistance value rv (1) exceeds 0 and is a positive value (YES in step S8), the determination unit 215 has a leak failure between the conductive paths L (0) and L (1). In addition, it is determined that there is no leak failure between the conductive paths L (1) and L (2) (step S9).

  When there is a leak failure between the conductive paths L (0) and L (1), even if the switching element SW1 is turned off, the discharge current of the battery B1 is connected to the resistor R1, via the leak failure location (for example, the capacitor C1). As a result of flowing through R0, a voltage drop occurs at resistors R1 and R0. Therefore, the detection voltage Vm (1) detected by the voltage detection unit U1 in this state, that is, the off voltage Vm (1) off includes the voltage drop of the resistors R1 and R0. As a result, the battery voltage Vb (1 ).

  Therefore, the battery voltage calculation unit 214 calculates the battery voltage Vb (1) based on the off voltage Vm (1) off, the on voltage Vm (1) on, and the following equation (2) (step S10). Expression (2) corresponds to expression (C) in the claims.

Vb (1) = 2IcR × Vm (1) off / (Vm (1) off−Vm (1) on) (2)
However,
R: resistance value of resistors R0 to Rn Ic: reference current value Ic.

  By the processing in step S10, the battery voltage calculation unit 214 calculates the battery voltage Vb (1) with high accuracy even when a leak failure occurs between the conductive paths L (0) and L (1). Can do.

  On the other hand, in step S8, when the leak resistance value rv (1) is a value equal to or less than 0, for example, a negative value (NO in step S8), the determination unit 215 determines whether the conductive path L (0), L (1) It is determined that there is no leak failure and that there is a leak failure between the conductive paths L (1) and L (2) (step S11). If there is a leak failure between the conductive paths L (1) and L (2), the battery voltage Vb (1) cannot be calculated at this time (calculated in step S38, which will be described later). Shifts to step S21 without calculating the battery voltage Vb (1).

  In step S21, the on / off voltage acquisition unit 211 adds 1 to the variable i (step S21). Next, the on / off voltage acquisition unit 211 acquires the detection voltage Vm (i) detected by the voltage detection unit Ui as the off voltage Vm (i) off in a state where the switching element SWi is turned off (step S22). .

  Next, the on / off voltage acquisition unit 211 turns on the switching element SWi and supplies the detection voltage Vm (i) detected by the voltage detection unit Ui in a state where the current of the reference current value Ic is caused to flow by the constant current source PSi. And obtained as an on-voltage Vm (i) on (step S23). After acquiring the on-voltage Vm (i) on, the on-off voltage acquisition unit 211 turns off the switching element SWi.

  Next, the determination unit 215 confirms whether or not a leak failure has occurred between the conductive paths L (i-2) and L (i-1) (step S24). Specifically, when the variable i is 2, the determination unit 215 confirms whether or not the determination unit 215 determines that there is a leak failure between the conductive paths L (0) and L (1) in step S9. If the variable i is 3 or more, in step S36 described later, the determination unit 215 determines that there is a leakage failure between the conductive paths L (i-1) and L (i) before adding 1 to the variable i. Confirm whether or not.

  When a leak failure has occurred between the conductive paths L (i-2) and L (i-1) (YES in step S24), the determination unit 215 determines that the off voltage Vm (i) off and the on voltage Vm ( i) On the basis of on and the following equation (3), the calculated resistance value rc (i-1) is calculated (step S25). Formula (3) corresponds to Formula (F) in the claims.

rc (i-1) = [{-3IcR + 2 (Vm (i) off-Vm (i) on)} / {2IcR- (Vm (i) off-Vm (i) on)}]. times.R ( 3)
However,
R: resistance value of resistors R0 to Rn Ic: reference current value Ic.

  Next, the determination unit 215 compares the leak resistance value rv (i-1) with the calculated resistance value rc (i-1) (step S26). Specifically, if the variable i is 2, the determination unit 215 compares the leak resistance value rv (1) calculated in step S4 with the calculated resistance value rc (i-1), and the variable i is 3 If so, the leakage resistance value rv (i) calculated before 1 is added to the variable i in step S31 described later is compared with the calculated resistance value rc (i-1).

  When the leak resistance value rv (i-1) and the calculated resistance value rc (i-1) are substantially equal (YES in step S26), the determination unit 215 determines that the conductive path L (i-1), It is determined that no leak failure has occurred between L (i) and between the conductive paths L (i) and L (i + 1) (step S27).

  Note that “substantially equal” means that the difference between the leak resistance value rv (i−1) and the calculated resistance value rc (i−1) is, for example, the voltage detection error of the voltage detection unit U and the resistances R0 to Rn. Meaning that it is within an error range that may be caused by a resistance value accuracy error and a calculation error of the leak resistance value rv (i-1) and the calculation resistance value rc (i-1) by the leak resistance calculation unit 213. Yes.

  Next, the battery voltage calculation unit 214 calculates the battery voltage Vb (i) based on the off voltage Vm (i) off, the on voltage Vm (i) on, the battery voltage Vb (i-1), and the following equation (4). ) Is calculated (step S28), and the process proceeds to step S29.

  The battery voltage calculation unit 214 uses the battery voltage Vb (1) calculated in step S10 as the battery voltage Vb (i-1) if the variable i is 2, and if the variable i is 3 or more, the variable i The battery voltage Vb (i) calculated in step S37 before 1 is added to is used as the battery voltage Vb (i-1). Expression (4) corresponds to expression (E) in the claims.

Vb (i) = Vm (i) off-Vb (i-1) .times. [{2IcR- (Vm (i) off-Vm (i) on)} / (IcR)] (4)
However,
R: resistance value of resistors R0 to Rn Ic: reference current value Ic.

  As described above, even if a leakage failure occurs between the conductive paths L (i-2) and L (i-1) by steps S25 to S28, the distance between the conductive paths L (i-1) and L (i) is determined. If the leakage failure does not occur between the conductive paths L (i) and L (i + 1), the battery voltage calculation unit 214 calculates the battery voltage Vb (i) with high accuracy based on the equation (4). be able to.

  On the other hand, when the leak resistance value rv (i-1) and the calculated resistance value rc (i-1) are not substantially equal (NO in step S26), the determination unit 215 determines that the conductive path L (i-2) , L (i-1), it is determined that a leak failure has occurred, that is, that a leak failure has occurred at a plurality of locations (step S30). If the leak failure occurs at a plurality of locations, the battery voltage Vb (i) cannot be calculated, and the determination unit 215 ends the process.

  On the other hand, if no leakage failure has occurred between the conductive paths L (i-2) and L (i-1) in step S24 (NO in step S24), the leakage resistance calculation unit 213 uses the off voltage Vm (i ) off, the on-voltage Vm (i) on, and the leak resistance value rv (i) is calculated based on the following equation (5) (step S31). Expression (5) corresponds to Expression (A) in the claims.

rv (i) = {2R (Vm (i) off-Vm (i) on)} / {2IcR- (Vm (i) off-Vm (i) on)} (5)
However,
R: resistance value of resistors R0 to Rn Ic: reference current value Ic.

  As described above, the leak resistance calculation unit 213 performs the leak resistance value rv (1) to rv (1) ˜ between the conductive paths connected to each battery B even when the plurality of batteries B are connected in series by the process of step S31. rv (n) can be calculated.

  Next, the determination unit 215 compares the leak resistance value rv (i) calculated in step S31 with the determination value Ra (step S32). When the leakage resistance value rv (i) is equal to or greater than the determination value Ra (YES in step S32), the determination unit 215 has no leakage failure between the conductive paths L (i-1) and L (i), and It is determined that there is no leak failure between the conductive paths L (i) and L (i + 1) (step S33).

  In this case, since the voltage detection unit Ui can correctly detect the battery voltage Vb (i) of the battery Bi, the battery voltage calculation unit 214 uses the off voltage Vm (i) off detected by the voltage detection unit Ui. The battery voltage Vb (i) is acquired (step S34), and the process proceeds to step S29.

  On the other hand, when the leakage resistance value rv (i) is less than the determination value Ra in step S32 (NO in step S32), the determination unit 215 compares the leakage resistance value rv (i) with 0 (step S35). . If the leak resistance value rv (i) exceeds 0 and is a positive value (YES in step S35), the determination unit 215 causes the leakage failure between the conductive paths L (i-1) and L (i). And there is no leakage failure between the conductive paths L (i) and L (i + 1) (step S33).

  When there is a leak failure between the conductive paths L (i-1) and L (i), even if the switching element SWi is turned off, the discharge current of the battery Bi is resistance through the leak failure location (for example, the capacitor Ci). As a result of flowing through Ri and Ri-1, a voltage drop occurs at the resistors Ri and Ri-1. Therefore, in this state, the detection voltage Vm (i) detected by the voltage detection unit Ui, that is, the off voltage Vm (i) off includes a voltage drop of Ri and Ri−1. As a result, the battery voltage Vb ( An error occurs with i).

  Therefore, the battery voltage calculation unit 214 calculates the battery voltage Vb (i) based on the off voltage Vm (i) off, the on voltage Vm (i) on, and the following equation (6) (step S37). Expression (6) corresponds to Expression (C) in the claims.

Vb (i) = 2IcR × Vm (i) off / (Vm (i) off−Vm (i) on) (6)
However,
R: resistance value of resistors R0 to Rn Ic: reference current value Ic.

  By the processing in step S37, the battery voltage calculation unit 214 calculates the battery voltage Vb (i) with high accuracy even when a leak failure occurs between the conductive paths L (i-1) and L (i). can do.

  Next, in step S38, the battery voltage calculation unit 214 changes the battery voltage Vb (i) calculated in step S37, the off voltage Vm (i-1) off, and the on voltage Vm (i-1) on. Based on the following formula (7), the battery voltage Vb (i-1) is calculated (step S38), and the process proceeds to step S29. Expression (7) corresponds to Expression (D) in the claims.

Vb (i-1) = Vm (i-1) off- [Vb (i) * {IcR- (Vm (i-1) on-Vm (i-1) off)} / (2IcR)] ... (7)
However,
R: resistance value of resistors R0 to Rn Ic: reference current value Ic.

  As a result of the processing in step S38, a leakage failure has occurred between the conductive paths connected to both ends of the battery B adjacent to the battery Bi before 1 is added to the variable i, so that the leakage resistance values rv (1), rv Even if (i) becomes a negative value (No in steps S8 and S35) and the correct battery voltage Vb (i) cannot be calculated (steps S11 and S39), it can be calculated. The battery voltage Vb (i-1) corresponding to the battery voltage Vb (i) that did not exist can be calculated.

  On the other hand, in step S35, when the leak resistance value rv (1) is a value equal to or less than 0, for example, a negative value (NO in step S35), the determination unit 215 determines the conductive paths L (i-1), L (i ) Between the conductive paths L (i) and L (i + 1) (step S39). If there is a leak failure between the conductive paths L (i) and L (i + 1), the battery voltage Vb (i) cannot be calculated at this time (calculated in step S38). Shifts to step S29 without calculating the battery voltage Vb (i).

  In step S29, the on / off voltage acquisition unit 211 compares the variable i with the number n of the batteries B (step S29). If the variable i is equal to the number n (Yes in step S29), the battery voltages Vb (1) to Vb (n) are calculated for all the batteries B, and the leakage resistance value of the conductive path corresponding to each battery B is calculated. Since the calculation of rv (1) to rv (n) and the determination of the presence or absence of a leak failure in each conductive path have been completed, the on / off voltage acquisition unit 211 ends the process.

  On the other hand, if the variable i and the number n are not equal (No in step S29), the on / off voltage acquisition unit 211 proceeds to step S21 to continue the process for the next battery B.

  As described above, the battery power supply device 1 and the leak processing device 2 shown in FIG. 1 deal with the leak failure by the processing of steps S1 to S39, calculate the battery voltages Vb (1) to Vb (n), and each battery B. It is possible to calculate the leakage resistance values rv (1) to rv (n) of the conductive paths corresponding to the above and determine the presence or absence of a leak failure in each conductive path.

  For example, the communication IF 24 includes information indicating the battery voltage Vb (1) to Vb (n), the leakage resistance value rv (1) to rv (n), and the determination result of the presence or absence of a leakage failure in each conductive path. You may transmit to the external device connected to the connection terminal 13. FIG.

  Alternatively, the control unit 21 may include an equalization processing unit that equalizes the battery voltages Vb (1) to Vb (n) based on the battery voltages Vb (1) to Vb (n). Specifically, for example, the controller 21 updates the battery voltages Vb (1) to Vb (n) by repeatedly executing steps S1 to S39. The equalization processing unit sets a battery B other than the battery B corresponding to the lowest voltage among the battery voltages Vb (1) to Vb (n) as an equalization discharge target battery, and performs switching corresponding to the equalization discharge target battery. The element SW is turned on until the battery voltage Vb of the corresponding equalization discharge target battery becomes substantially equal to the lowest voltage, and the equalization discharge target battery is discharged. Thereby, even if a leak failure occurs, the battery voltages Vb (1) to Vb (n) can be equalized with high accuracy.

  The battery voltage calculation unit 214 uses the following equation (8) instead of the equation (2) in step S10, the leakage resistance value rv (1) calculated in step S4, and the off voltage Vm (1). The battery voltage Vb (1) may be calculated based on off. Expression (8) corresponds to Expression (B) in the claims.

Vb (1) = {(2R / rv (1)) + 1} × Vm (1) off (8)
However,
R: Resistance value of resistors R0 to Rn Further, in step S37, the battery voltage calculation unit 214 uses the following equation (9) instead of equation (6), and uses the leakage resistance value rv (i calculated in step S31. ) And the off voltage Vm (i) off, the battery voltage Vb (i) may be calculated. Expression (9) corresponds to Expression (B) in the claims.

Vb (i) = {(2R / rv (i)) + 1} * Vm (i) off (9)
However,
R: Resistance value of resistors R0 to Rn In order to calculate battery voltages Vb (1) and Vb (i) by using equations (8) and (9) instead of equations (2) and (6) It is possible to simplify the arithmetic processing.

  In addition, you may transfer to step S29 from step S27, without performing step S28. However, even if a leak failure occurs in the conductive path of the battery Bi-1 adjacent to the battery Bi by executing step S28 (YES in step S24), the battery voltage Vb (i) of the battery Bi is set. It can be calculated with high accuracy.

  Further, steps S25, S26, S27, and S30 may not be executed, and the process may proceed from step S24 to step S28. However, by executing Steps S25, S26, S27, and S30, the risk of calculating the low-accuracy battery voltage Vb (i) when a plurality of leak failures has occurred is reduced. Further, the occurrence state of the leak failure can be determined in detail by steps S27 and S30.

  Further, when steps S8, S9, S11 and steps S35, S36, S39 are not executed, and NO is determined in step S5 and NO in step S32, the process may proceed to steps S10 and S37, respectively. However, by executing Steps S8, S9, and S11 and Steps S35, S36, and S39, it is possible to determine the occurrence status of the leak failure in detail. In addition, when a leak failure occurs in the conductive path of the battery Bi + 1 adjacent to the battery Bi in steps S11 and S39, the battery voltage Vb (i) is not calculated, so the battery voltage Vb (i) with low accuracy is calculated. The fear is reduced.

  Further, steps S5 to S9, S11 and steps S32 to S36, S39 may not be executed, and the process may be shifted from steps S4, S31 to steps S10, S37, respectively. However, when there is no leak failure in the conductive path by executing steps S5 to S7 and steps S32 to S34, the battery voltages Vb (1), Vb are not executed without executing the equations (2) and (6). Since (i) is obtained, the amount of calculation processing can be reduced.

  Moreover, the battery B may be one. If there is only one battery B, steps S8, S11, and S21 to S39 may not be executed, and if No in step S5, the process may proceed to step S9.

  Moreover, it is good also as a structure which is not provided with the battery voltage calculation part 214, and does not perform step S7, S10, S28, S34, S37, S38.

  In addition, the leakage resistance calculation unit 213 and the determination unit 215 are not provided, the steps S4 to S9, S11, S24 to S28, S30 to S36, and S39 are not executed, the process proceeds from step S3 to step S10, and the step from step S23 It is good also as a structure which transfers to S37.

  Next, a method for deriving the above formulas (1) to (7) will be described. First, a method for deriving Expressions (1) and (2) will be described based on the circuit model of FIG.

In the following description, when the i are arbitrary integers, r _v leakage resistance, I _rv is current flowing through the leakage resistance, V M _(i) is the detected voltage value of the voltage detection unit Ui, I _R is the resistance The value of the current flowing through Ri indicates “ _{_on} ” added to the end of the symbol, which indicates that the switching element SWi is on, and “ _{_off} ” added to the end of the symbol indicates the switching element SWi. This is the value when is off. A circuit including the battery Bi and the conductive paths L (i−1) and L (i) corresponding to the battery Bi, the constant current source PSi, the switching element SWi, and the voltage detection unit Ui is referred to as a channel “chi”. .

以上、式（Ｉ−ｒ）から式（１）が得られ、式（Ｉ−Ｖｂ）から式（２）が得られる。

As described above, the formula (1) is obtained from the formula (Ir), and the formula (2) is obtained from the formula (I-Vb).

  Next, a method for deriving Expressions (3) to (7) will be described based on the circuit model of FIG. 6 that is partially cut out from the leak processing apparatus 2 shown in FIG. The circuit model shown in FIG. 6 includes three chn−1, chn, and chn + 1.

以上、式（III−ｒｖ）から式（３）が得られ、式（III−Ｖｂ）から式（４）が得られる。

As described above, the formula (3) is obtained from the formula (III-rv), and the formula (4) is obtained from the formula (III-Vb).

以上、式（Ｖ−ｒ）から式（５）が得られ、式（Ｖ−Ｖｂ）から式（６）が得られる。

As described above, Expression (5) is obtained from Expression (Vr), and Expression (6) is obtained from Expression (V-Vb).

以上、式（ＶＩ−Ｖｂ）から式（７）が得られる。これらの数式の関係をまとめると、図７に示す通りとなる。

As described above, Expression (7) is obtained from Expression (VI-Vb). The relationship between these mathematical expressions is summarized as shown in FIG.

  A leak treatment apparatus according to the present invention and a battery power supply apparatus using the leak treatment apparatus include a portable personal computer, a digital camera, a mobile phone, an electric vehicle, a hybrid car, a hybrid elevator, and a solar cell, a power generation device, and a secondary battery. It can be suitably used in various devices and systems such as a combined power supply system and a non-disruptive power supply device.

DESCRIPTION OF SYMBOLS 1 Battery power supply device 2 Leak processing device 3 Battery assembly 11, 12, 13 Connection terminal 21 Control part 22 Voltage measurement part 24 Communication IF
211 ON / OFF voltage acquisition unit 212 Leak information calculation unit 213 Leak resistance calculation unit 214 Battery voltage calculation unit 215 Determination unit B, B1 to Bn Battery C, C1 to Cn Capacitor D, D1 to Dn Discharge unit Ic Reference current values L and L ( 1) to L (n) conductive path PS, PS1 to PSn constant current source R, R0 to Rn resistance Ra judgment value rc calculation resistance value rv leakage resistance value SW, SW1 to SWn switching element U, U1 to Un voltage detection unit Vb , Vb (1) to Vb (n) Battery voltage Vm (1) off to Vm (n) off Off voltage Vm (1) on to Vm (n) on On voltage Vm (1) to Vm (n) Detection voltage

Claims (18)

A first resistor having one end connected to one pole of the first battery;
A first conductive path connected to the other end of the first resistor;
A connection resistor having one end connected to the other electrode of the first battery;
A connection conductive path connected to the other end of the connection resistance;
A first voltage detector for detecting a voltage between the first conductive path and the connection conductive path;
A first discharge unit capable of switching between an on state in which a predetermined reference current flows between the first conductive path and the connection conductive path and an off state in which the reference current does not flow;
The voltage detected by the first voltage detection unit when the first discharge unit is turned off is obtained as a first off voltage, and the first voltage is obtained when the first discharge unit is turned on. An on / off voltage acquisition unit for acquiring a voltage detected by the detection unit as a first on-voltage;
Based on the first off voltage and the first on voltage, at least one of a resistance value between the first conductive path and the connection conductive path and a first battery voltage that is a battery voltage of the first battery. A leak processing apparatus comprising: a leak information calculation unit that calculates The leak information calculation unit
2. A leak resistance calculation unit that calculates a resistance value between the first conductive path and the connection conductive path as a first leak resistance value based on the first off voltage and the first on voltage. The described leak processing apparatus. 3. The leak processing apparatus according to claim 2, wherein the leak resistance calculation unit calculates the first leak resistance value rv (1) based on the following equation (A).
rv (1) = {2R (Vm (1) off-Vm (1) on)} / {2IcR- (Vm (1) off-Vm (1) on)} (A)
However,
Vm (1) on: the first on voltage Vm (1) off: the first off voltage R: the resistance value Ic of the first resistor and the connection resistance Ic: the current value of the reference current The leak information calculation unit
A battery voltage calculation unit configured to calculate the first battery voltage based on the first leakage resistance value calculated based on the first off voltage and the first on voltage and the first off voltage; The leak processing apparatus according to claim 2 or 3. The leak processing apparatus according to claim 4, wherein the battery voltage calculation unit calculates the first battery voltage Vb (1) based on the following formula (B).
Vb (1) = {(2R / rv (1)) + 1} × Vm (1) off (B)
However,
Vm (1) off: the first off voltage rv (1): the first leakage resistance value R: the resistance value of the first resistance and the connection resistance The leak information calculation unit
The leak processing apparatus according to claim 2, further comprising a battery voltage calculation unit that calculates the first battery voltage based on the first off voltage and the first on voltage. The leak processing apparatus according to claim 6, wherein the battery voltage calculation unit calculates the first battery voltage Vb (1) based on the following formula (C).
Vb (1) = 2IcR × Vm (1) off / (Vm (1) off−Vm (1) on) (C)
However,
Vm (1) on: the first on voltage Vm (1) off: the first off voltage R: the resistance value Ic of the first resistor and the connection resistance Ic: the current value of the reference current The first battery and the second battery are connected in series;
A second resistor having one end connected to a pole different from the pole connected to the first battery of the second battery;
A second conductive path connected to the other end of the second resistor;
A second voltage detector for detecting a voltage between the second conductive path and the first conductive path;
A second discharge unit capable of switching between an on state in which the reference current flows between the second conductive path and the first conductive path and an off state in which the reference current does not flow;
The on / off voltage acquisition unit further includes:
The voltage detected by the second voltage detection unit when the second discharge unit is turned off is obtained as a second off voltage, and the second voltage is obtained when the second discharge unit is turned on. The voltage detected by the detection unit is acquired as the second on-voltage,
The battery voltage calculation unit
The leak processing apparatus according to claim 4, further calculating a second battery voltage that is a battery voltage of the second battery based on the second off voltage and the second on voltage. The battery voltage calculation unit
9. The leak processing apparatus according to claim 8, wherein when the first leak resistance value becomes a negative value, the first battery voltage Vb (1) is calculated based on the following formula (D).
Vb (1) = Vm (1) off- [Vb (2) × {IcR- (Vm (1) on-Vm (1) off)} / (2IcR)] (D)
However,
Vm (1) on: the first on voltage Vm (1) off: the first off voltage Vb (2): the second battery voltage R: the resistance of the first resistance, the second resistance, and the connection resistance Value Ic: current value of the reference current When the first leak resistance value is less than a predetermined determination value and the first leak resistance value is a positive value, a leak failure occurs between the first conductive path and the connection conductive path. When the first leakage resistance value is less than the determination value and the first leakage resistance value is a negative value, the second conductive path and the first conductive path The leak processing apparatus according to claim 8, further comprising a determination unit that determines that there is a leak failure in between. The battery voltage calculation unit
When the determination unit determines that there is a leakage failure between the first conductive path and the connection conductive path, based on the second off voltage, the second on voltage, and the first battery voltage The leak processing apparatus according to claim 10, wherein the second battery voltage is calculated. The battery voltage calculation unit
When the determination unit determines that there is a leak failure between the first conductive path and the connection conductive path, the second battery voltage Vb (2) is calculated based on the following equation (E). The leak processing apparatus according to claim 11.
Vb (2) = Vm (2) off-Vb (1) * [{2IcR- (Vm (2) off-Vm (2) on)} / (IcR)] (E)
However,
Vm (2) on: the second on voltage Vm (2) off: the second off voltage Vb (1): the first battery voltage R: the resistance of the first resistance, the second resistance, and the connection resistance Value Ic: current value of the reference current The determination unit
When it is determined that there is a leakage failure between the first conductive path and the connection conductive path, the first conductive path and the connection conductive path are determined based on the second off voltage and the second on voltage. The resistance value is calculated as a first calculation resistance value, and when the first calculation resistance value and the first leak resistance value are not substantially equal, it is determined that a plurality of leak faults have occurred. 13. The leak processing apparatus according to any one of items 12. The determination unit
The leak processing apparatus according to claim 13, wherein the first calculation resistance value rc (1) is calculated based on the following equation (F).
rc (1) = [{-3IcR + 2 (Vm (2) off-Vm (2) on)} / {2IcR- (Vm (2) off-Vm (2) on)}] * R (F)
However,
Vm (2) on: the second on voltage Vm (2) off: the second off voltage R: resistance value Ic of the first resistor, the second resistor, and the connection resistor Ic: current value of the reference current The battery voltage calculation unit
The leak processing device according to claim 13 or 14, wherein when the determination unit determines that a plurality of leak failures occur, the calculation of the second battery voltage is not performed. The leak information calculation unit
The leak processing apparatus according to claim 1, further comprising: a battery voltage calculation unit that calculates the first battery voltage based on the first off voltage and the first on voltage. The leak treatment apparatus according to any one of claims 1 to 16,
A battery power supply device comprising: the first battery. The leak treatment apparatus according to any one of claims 8 to 15 ,
The first battery;
A battery power supply device comprising: the second battery.

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