JP2016162729A - Battery type determination device and battery type determination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a battery type determination device and the battery type determination method that can determine the type of lead storage battery with a high degree of accuracy.SOLUTION: A battery type determination device includes a sensor unit for detecting a terminal voltage of the lead storage battery and a type determination unit that determines the type of the lead storage battery based on the detected terminal voltage. The type determination unit determines the type of the lead storage battery based on the amount of change in the inter-terminal voltage detected by the sensor within a predetermined period after the start of charging of the lead storage battery.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a battery type determination device and a battery type determination method for determining a type of a battery.

  A vehicle having an engine as a main power source is equipped with a battery as a power source of a starter motor for starting the engine. As the battery, a lead storage battery is generally used. In recent years, the charge / discharge characteristics of lead-acid batteries have been improved. For this reason, lead-acid batteries are becoming popular as power sources for special electric vehicles such as electric carts or forklifts that are not profitable with expensive lithium ion secondary batteries.

  The largest number of troubles with private cars (specifically, the number of times the Japan Automobile Federation has been dispatched) is battery run-up and battery performance decline. In recent years, an idling stop system has been adopted in order to reduce exhaust gas from vehicles using an engine as a main power source. However, if a lead storage battery for a non-idling stop system or a low-grade lead storage battery with inferior performance is used in the idling stop system, the idling stop system may not function normally.

  In order to prevent such a battery trouble, an apparatus for identifying the type of battery mounted on a vehicle has been proposed (see, for example, Patent Document 1).

JP 2009-54373 A

  However, the conventional technique has a problem that good accuracy cannot be obtained when determining the type of battery. For example, in the battery type identification method disclosed in Patent Document 1, a current waveform is acquired after a predetermined voltage is applied to the battery, and the battery type is identified based on the current waveform. However, in this method, the current waveform varies depending on the battery temperature or the state of charge (SOC), and good accuracy cannot be obtained.

  An object of the present invention is to provide a battery type determination device and a battery type determination method that can determine the type of a lead storage battery with high accuracy.

  A battery type determination device according to an aspect of the present invention includes a sensor unit that detects a terminal voltage of a lead storage battery, and a type determination unit that determines a type of the lead storage battery based on the detected terminal voltage. The type determining unit determines the type of the lead storage battery based on the amount of change in the inter-terminal voltage detected by the sensor unit within a predetermined period after the start of charging of the lead storage battery. .

  A battery type determination method according to an aspect of the present invention includes a step of detecting a terminal voltage of a lead storage battery, and a type determination step of determining a type of the lead storage battery based on the detected terminal voltage. The type determination step is a method of determining the type of the lead storage battery based on the amount of change in the voltage between the terminals detected within a predetermined period after the start of charging of the lead storage battery.

  According to the present invention, the type of lead storage battery can be determined with high accuracy.

1 is a block diagram showing a part of a vehicle including a battery type determination device according to Embodiment 1 of the present invention. The graph which shows the voltage and electric current of a lead storage battery when the battery classification determination apparatus which concerns on Embodiment 1 performs classification determination Flow chart showing a first example of type determination processing Flowchart showing a second example of type determination processing Flowchart showing a third example of type determination processing The block diagram which shows a part of vehicle containing the battery classification determination apparatus which concerns on Embodiment 2 of this invention. The block diagram which shows a part of vehicle containing the battery classification determination apparatus which concerns on Embodiment 3 of this invention. The block diagram which shows a part of vehicle containing the battery classification determination apparatus which concerns on Embodiment 4 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a part of a vehicle including a battery type determination device according to Embodiment 1 of the present invention.

  The battery type determination apparatus 10 according to the first embodiment of the present invention is mounted on a vehicle that travels mainly with engine power and has an idling stop system (ISS).

  The vehicle includes a battery type determination device 10, a lead storage battery 20, an ECU (Electronic Control Unit) 30, a load 31, an alternator 32, and a starter motor 33. Although illustration is omitted, the vehicle has an engine and driving wheels.

  The starter motor 33 is a motor that starts the engine. The crankshaft is rotated by the drive of the starter motor 33, and the engine starts when the engine stroke starts. Rotating the crankshaft of the engine by driving the starter motor 33 is called cranking. The starter motor 33 is operated by the electric power of the lead storage battery 20 based on an operation control signal from the ECU 30.

  The alternator 32 generates power using the rotational power of the crankshaft. The alternator 32 may generate power using the rotational power of the drive wheels. In addition, the alternator 32 rectifies the generated power and adjusts the voltage based on the voltage control signal of the ECU 30.

  The load 31 is, for example, an electrical auxiliary device necessary for operating the engine, and includes, for example, a fuel injection device, a spark plug, and the like. Auxiliary equipment means peripheral equipment necessary for operating the engine in addition to the engine body. The load 31 may include various electric devices mounted on the vehicle such as an interior lighting, a meter panel, and a lighting device.

  The lead storage battery 20 is a battery that can be charged and discharged. The lead storage battery 20 is charged by the electric power of the alternator 32. The lead storage battery 20 supplies power to the starter motor 33, the load 31, the ECU 30, and the battery type determination device 10.

  The ECU 30 controls the engine. Specifically, the ECU 30 controls the operation of the starter motor 33, the power generation voltage of the alternator 32, and the auxiliary machine.

  In the present embodiment, the ECU 30 sends charge / discharge control information to the battery type determination device 10. Furthermore, ECU30 receives the information of the classification determination result of the lead storage battery 20 from the battery classification determination apparatus 10, and performs control according to the determination result. For example, the ECU 30 controls the idling stop system if the battery type is a lead storage battery for an idling stop system, and does not control the idling stop system if the battery type is a lead storage battery for a non-idling stop system. Moreover, if the battery type is a low-grade product, which will be described later, the ECU 30 may perform control for giving a warning.

  The battery type determination device 10 determines the type of the lead storage battery 20. In addition, the battery type determination device 10 may have a function of monitoring the SOC (state of charge) of the lead storage battery 20 and the deterioration level.

  The battery type determination device 10 includes a timing determination unit 11, a sensor unit 12, and a type determination unit 13.

  Each functional block of the battery type determination device 10 may be configured as a one-chip semiconductor integrated circuit, excluding elements (such as current detection resistors) of the sensor unit 12. Further, the battery type determination device 10 may be configured by a plurality of semiconductor integrated circuits, excluding the elements of the sensor unit 12. Further, a part of the battery type determination device 10 or the whole except the elements of the sensor unit 12 may be configured by one semiconductor integrated circuit together with the ECU 30 or another ECU mounted on the vehicle. Further, the plurality of functional blocks of the battery type determination device 10 may be integrated into one functional block.

  The sensor unit 12 detects the charge / discharge current and voltage of the lead storage battery 20 and outputs a detection signal to the type determination unit 13. The detected voltage is the voltage between the terminals of the lead storage battery 20 at the time of charging, discharging, and when the terminal is opened. In the type determination of the first embodiment, the sensor unit 12 may be configured to output only the voltage to the type determination unit 13.

  The timing determination unit 11 determines the timing at which the lead storage battery 20 is switched from the discharge control to the charge control based on the charge / discharge control information sent from the ECU 30. The timing determination unit 11 sends a signal to the type determination unit 13 at the above switching timing to notify that it is this period.

  The type determination unit 13 performs a predetermined type determination process at the timing notified from the timing determination unit 11 to determine the type of the lead storage battery 20. Details of the type determination process will be described later. The type determination unit 13 notifies the ECU 30 of the type determination result. The type determination unit 13 may output the type determination result to another control unit. Alternatively, the battery type determination device 10 may perform a result display output or a warning output based on the result based on the type determination result.

  Types of the lead storage battery 20 include a lead storage battery for an idling stop system (ISS), a lead storage battery for a non-idling stop system, and a low-grade lead storage battery. In other words, the lead acid battery for the non-idling stop system is a normal lead acid battery, and the low grade lead acid battery is a lead acid battery whose performance is inferior to that of the normal lead acid battery. The battery performance here mainly means the life of the battery.

  A lead-acid battery for an idling stop system is generally required to have durability of several years when used in a vehicle for an idling stop system. Durability is required (approx. 3 years or more).

  Lead-acid batteries for non-idling stop systems have a shorter life than lead-acid batteries for idling stop systems when the size is the same. For example, a normal lead-acid battery (ordinary product) used for a normal engine start has a life of about 1.5 years.

  Low-grade lead-acid batteries include, for example, capacity-oriented lead-acid batteries that have been reduced in weight by reducing the active material content compared to normal products for rationalization. One year when used for normal engine start (For example, about 0.5 years).

  If lead-acid batteries for non-idle-stop systems or low-grade lead-acid batteries are mistakenly installed in a vehicle with an idling stop system, there is a high possibility that it will not be possible to respond to service inspections such as annual vehicle inspections. . Therefore, in the vehicle of the idling stop system, it is desired to determine the type of the lead storage battery installed.

  The type determination unit 13 determines the types of the three types of lead storage batteries. The type determination unit 13 may perform two types of determination: a lead storage battery for an idling stop system and another lead storage battery.

[Type judgment timing]
FIG. 2 is a graph showing the voltage and current of the lead storage battery when the battery type determination device according to Embodiment 1 performs type determination. The graph shows changes in voltage and current between a lead storage battery for an idling stop system (referred to as “battery A”) and a lead storage battery for a non-idling stop system (referred to as “battery B”).

  As shown in the range W10 of FIG. 2, the type determination unit 13 uses the lead storage battery based on the voltage change amount of the inter-terminal voltage detected within a predetermined period T10 after the lead storage battery 20 starts charging from zero current. 20 types are determined.

  As shown in a range W10 in FIG. 2, in a predetermined period T10 after the start of charging, the battery B having a low charge acceptance performance has a large voltage change amount and a high voltage quickly compared to the battery A having a high performance. . The type determination unit 13 identifies such a difference and determines the type of the lead storage battery 20.

  The predetermined period T10 assigned as a period for observing the voltage between the terminals of the lead storage battery 20 for determining the type is preferably within 10 seconds from the start of charging, more preferably within 5 seconds from the start of charging, and further preferably charging. It should be within 3 seconds from the start. Alternatively, the predetermined period T10 is such that the charging current of the lead-acid storage battery for the idling stop system becomes the maximum (see the range W11 in FIG. 2) from the start of charging to a predetermined coefficient multiple of this time length. You may decide to. By determining the predetermined period in this way, the battery type determination device 10 can detect the characteristic of voltage change with little variation according to the type of the lead storage battery 20. Therefore, the battery type determination device 10 can stably determine the type of the lead storage battery 20.

  Preferably, the period during which the battery type determination device 10 observes the voltage between the terminals of the lead storage battery 20 for determining the type is within a predetermined period after the lead storage battery 20 starts charging when switching from discharging to charging. And good.

  More preferably, the period during which the battery type determination device 10 observes the voltage between the terminals of the lead storage battery 20 for determination of the type is determined when switching from discharge control to charge control at the start of the vehicle (during cranking), It may be within a predetermined period after the start of charging.

  The example of FIG. 2 shows the characteristics when the vehicle is started (cranking). During the cranking period T1, a large discharge current is output from the lead storage battery 20 by the discharge control of the ECU 30 in order to rotate the starter motor 33. Thereafter, when the engine is started, as shown in the period T10, the lead storage battery 20 is charged from the alternator 32 by the charging control of the ECU 30. Thus, by determining the period during which the inter-terminal voltage is observed, the battery type determination device 10 can detect the characteristics of the voltage change with less variation according to the type of the lead storage battery 20. Therefore, the battery type determination device 10 can determine the type of the lead storage battery 20 more stably.

[First example of type determination processing]
FIG. 3 is a flowchart illustrating a first example of the type determination process.

  In the first example of the type determination process, the type determination unit 13 measures the time from the start of charging until the voltage between the terminals of the lead storage battery 20 exceeds a threshold value Vth (for example, 13.8 V), and thereby the terminal after the start of charging. A method is adopted in which the amount of change in inter-voltage is determined. The threshold value Vth is set to a value (for example, 13.8 V) lower than the voltage value of constant voltage charging and higher than the value of the charging voltage of the lead storage battery at the start of charging, for example.

  When the type determination unit 13 is notified of the timing t10 immediately after the start of charging from the timing determination unit 11, the type determination unit 13 starts the type determination process of FIG.

  When the type determination process is started, the type determination unit 13 starts time measurement (step S1), and then acquires the inter-terminal voltage Vi (step S2) and compares the inter-terminal voltage Vi with the threshold value Vth ( Step S3) is repeated. And if the voltage Vi between terminals becomes more than the threshold value Vth, the classification determination part 13 will acquire the measurement time Ti at that time (step S4).

  Subsequently, the type determination unit 13 determines whether the measurement time Ti is equal to or greater than the first threshold Tth1 (step S5). If YES, the lead storage battery 20 is determined to be a lead storage battery for an idling stop system (ISS) (step S6). ). On the other hand, if NO, the type determination unit 13 determines whether the measurement time Ti is greater than or equal to the second threshold Tth2 (step S7). The second threshold Tth2 is set to a value shorter than the first threshold Tth1. If YES in step S7, the type determination unit 13 determines that the lead storage battery 20 is a lead storage battery for non-idling stop system (ISS) (step S8). On the other hand, if NO, the type determination unit 13 determines that the lead storage battery 20 is a low-grade lead storage battery (step S9).

  Note that the type determination process may be changed as follows.

[Second example of type determination processing]
FIG. 4 is a flowchart illustrating a second example of the type determination process.

  In the second example of the type determination process, the type determination unit 13 detects the interterminal voltage Vi of the lead storage battery 20 after a predetermined time from the determination process start timing t10, and this value determines the inter-terminal voltage for a predetermined period after the start of charging. The method of judging the magnitude of the change amount is adopted.

  When the timing determination unit 11 is notified of the timing t10 immediately after the start of charging, the type determination unit 13 starts the type determination process of FIG.

  When the type determination process is started, the type determination unit 13 starts time measurement (step S11), determines whether the measurement time exceeds a predetermined time (step S12), and repeats the determination until the predetermined time is exceeded. If the predetermined time is exceeded, the type determination unit 13 acquires the terminal voltage Vi of the lead storage battery 20 (step S13).

  Subsequently, the type determination unit 13 determines whether the terminal voltage Vi is equal to or lower than the first threshold value Vth1 (step S14). If YES, the lead storage battery 20 is determined to be a lead storage battery for an idling stop system (ISS) (step S14). S15). On the other hand, if NO, the type determination unit 13 determines whether the inter-terminal voltage Vi is equal to or lower than the second threshold value Vth2 (step S16). The second threshold value Vth2 is set to a value larger than the first threshold value Vth1. If YES in step S16, the type determination unit 13 determines that the lead storage battery 20 is a non-idling stop system (ISS) lead storage battery (step S17). On the other hand, if NO, the type determination unit 13 determines that the lead storage battery 20 is a low grade lead storage battery (step S18).

  In the example of FIG. 4, the type determination unit 13 determines the magnitude of the amount of change in voltage from a single terminal voltage Vi after a predetermined time from the determination processing start timing t10. However, the type determination unit 13 may acquire the inter-terminal voltage at two different timings after the determination processing start timing t10, and determine the amount of change in the inter-terminal voltage from these differences.

[Third example of type determination processing]
FIG. 5 is a flowchart illustrating a third example of the type determination process.

  In the third example of the type determination process, the type determination unit 13 continuously detects the terminal voltage Vi of the lead storage battery 20 within a predetermined period from the determination process start timing t10, and from these terminals for a predetermined period after the start of charging. A method of calculating the rate of change of the inter-voltage is adopted.

  The type determination unit 13 starts the type determination process of FIG. 5 when notified from the timing determination unit 11 of the timing t10 immediately after the start of charging.

  When the type determination process is started, the type determination unit 13 continuously acquires the inter-terminal voltage for a predetermined period (step S21). Then, the type determination unit 13 calculates a voltage change rate dV from the acquired data (step S22). The voltage change rate dV is not particularly limited, but may be a value that maximizes the slope of voltage versus time after removing fine changes with a filter. In short, as shown in the voltage line of the battery A shown in the range W10 in FIG. Can be identified.

  Subsequently, the type determination unit 13 determines whether the voltage change rate dV is equal to or less than the first threshold value dVth1 (step S23). If YES, the lead storage battery 20 is determined to be a lead storage battery for an idling stop system (ISS) ( Step S24). On the other hand, if NO, the type determination unit 13 determines whether the voltage change rate dV is equal to or less than the second threshold value dVth2 (step S25). The second threshold dVth2 is set to a value larger than the first threshold dVth1. If YES in step S25, the type determination unit 13 determines that the lead storage battery 20 is a non-idling stop system (ISS) lead storage battery (step S26). On the other hand, if NO, the type determination unit 13 determines that the lead storage battery 20 is a low grade lead storage battery (step S27).

  As described above, according to the battery type determination device 10 of the first embodiment, the lead storage battery 20 is based on the amount of change in the inter-terminal voltage within the predetermined period T10 after the lead storage battery 20 starts charging from zero current. Therefore, the type of the lead storage battery can be determined with high accuracy.

(Embodiment 2)
FIG. 6 is a block diagram illustrating a part of a vehicle including the battery type determination device according to the second embodiment.

  The battery type determination device 10A of the second embodiment is the same as the configuration of the first embodiment except that the input of the timing determination unit 11A is different. About the same structure, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  11 A of timing judgment parts of Embodiment 2 inputs the signal of the sensor part 12. FIG. 11 A of timing judgments mainly monitor the detection signal of charging / discharging electric current of the sensor part 12, and discriminate | determine the timing when charge of the lead storage battery 20 is started after discharge from the lead storage battery 20. As shown in FIG. Then, the start timing of the charging is notified to the type determining unit 13.

  The timing determination unit 11A of the second embodiment can determine the discharge control at the time of engine start (during cranking) shown in FIG. 2 by monitoring the waveform of the discharge current and the waveform of the voltage. Therefore, the timing determination unit 11A of the second embodiment also determines the charge start timing when switching from the discharge control at the time of engine start in FIG. 2 to the charge control, and this type is determined as the determination process start timing t10. 13 can be notified.

  The type determination process by the type determination unit 13 is the same as in the first embodiment.

  As described above, according to the battery type determination device 10A of the second embodiment, the same type determination as that of the first embodiment can be performed without receiving information on charge / discharge control from the ECU 30 of the vehicle.

(Embodiment 3)
FIG. 7 is a block diagram illustrating a part of the vehicle including the battery type determination device according to the third embodiment.

  The battery type determination device 10B of Embodiment 3 determines not only the amount of change in the voltage between the terminals of the lead storage battery 20 but also the temperature of the lead storage battery 20 and the SOC (charge rate: State of) for determining the type of the lead storage battery 20. Charge) information is also used. Other configurations are the same as those of the first embodiment. About the same structure as Embodiment 1, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  In addition to timing determination unit 11, sensor unit 12, and type determination unit 13B, battery type determination device 10B of the third embodiment further includes thermometer 15 that measures the temperature of lead storage battery 20, and SOC calculation that calculates the SOC. Part 16.

  The type determination unit 13B according to the third embodiment inputs the inter-terminal voltage of the lead storage battery 20 within a predetermined period after the lead storage battery 20 starts charging from zero current, and calculates the amount of change in the inter-terminal voltage during this period. calculate. Furthermore, the type determination unit 13B inputs the detection signal of the thermometer 15 and the calculation result of the SOC calculation unit 16 when performing the type determination.

  The type determination unit 13B performs the type determination described in the first embodiment. However, for example, when the temperature of the lead storage battery is abnormally high or abnormally low, the type determination is not performed. In addition, when the SOC is not within the predetermined range, the type determination is not performed.

  As described above, the type determination unit 13B does not perform the type determination when the temperature or SOC of the lead storage battery is outside the predetermined range and the determination accuracy decreases, and as a result, the type determination accuracy is improved. Can be higher.

  The type determination unit 13B may use an OCV (Open Circuit Voltage) of a lead storage battery instead of the SOC. Alternatively, all or any of SOC, OCV, and temperature may be used.

  Further, the type determination unit 13B is configured not to perform the type determination when the temperature, SOC, or OCV is outside a predetermined range, and the amount of change in the voltage between the terminals depending on the temperature, SOC, or OCV. The type may be determined by correcting the value representing.

  As described above, according to the battery type determination device 10B of the third embodiment, the battery type can be determined with higher accuracy.

(Embodiment 4)
FIG. 8 is a block diagram illustrating a part of the vehicle including the battery type determination device of the fourth embodiment.

  In the fourth embodiment, the same battery type determination device 10 as that of the first embodiment is used as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), or an electric vehicle (EV). : An example mounted on an electric vehicle such as electric vehicle.

  The vehicle includes a main power supply battery 41, a DC-DC converter 42, a motor peripheral auxiliary machine 43, a traveling motor 44, and an auxiliary battery 20C.

  The main power supply battery 41 is, for example, a lithium ion battery, and supplies large electric power used for traveling to the traveling motor 44.

  The DC-DC converter 42 lowers the voltage of the main power supply battery 41 and outputs the power of the main power supply battery 41 to the power supply line L10. As a result, the DC-DC converter 42 can supply power to the load 31 and charge the auxiliary battery 20C. The DC-DC converter 42 is controlled by the ECU 30, for example.

  The motor peripheral accessory 43 is an accessory necessary for driving the traveling motor 44. The motor peripheral accessory 43 includes, for example, a relay switch that opens and closes the connection between the power line of the main power supply battery 41 and the power line of the traveling motor 44 (eg, its inverter circuit). The motor peripheral auxiliary machine 43 is driven by the electric power of the auxiliary battery 20C based on the control of the ECU 30.

  The auxiliary battery 20 </ b> C is a lead storage battery and is a target of type determination by the battery type determination device 10.

  In the vehicle of the fourth embodiment, when starting the vehicle, first, the motor peripheral auxiliary machine 43 is driven by the electric power of the auxiliary battery 20C. As a result, power can be supplied from the main power supply battery 41 to the traveling motor 44. Thereafter, when the traveling motor 44 is driven by the power of the main power supply battery 41, the auxiliary battery 20C is charged from the main power supply battery 41 via the DC-DC converter 42.

  As described above, when the vehicle is started by the traveling motor 44, the discharge control of the auxiliary battery 20C is switched to the charge control. A series of operations when the vehicle is started by the traveling motor 44 may be referred to as cranking.

  The ECU 30 stores information on discharge control of the auxiliary battery 20C (drive control of the motor peripheral auxiliary machine 43) and information on charge control of the auxiliary battery 20C when starting the vehicle by the traveling motor 44. The data is sent to the timing determination unit 11 of the type determination device 10.

  The timing determination unit 11 determines the charging start timing when changing from the above information to the charging control of the auxiliary battery 20C, and notifies the type determination unit 13 of this timing as the determination processing start timing t10. be able to.

  The type determination process by the type determination unit 13 is the same as in the first embodiment.

  As described above, according to the battery type determination device 10 of the fourth embodiment, even in a vehicle that can be driven by the driving motor 44, the type of the auxiliary battery 20C can be determined with high accuracy.

  The embodiments of the present invention have been described above.

  Note that the present invention is not limited to the specific configuration and method described in the above embodiment, and can be modified as appropriate without departing from the spirit of the invention.

  The present invention can be used, for example, in an apparatus that determines the type of a lead storage battery mounted on a vehicle.

10, 10A, 10B Battery type determination device 11, 11A Timing determination unit 12 Sensor unit 13, 13B Type determination unit 15 Thermometer 16 SOC calculation unit 20 Lead storage battery 20C Auxiliary battery 30 ECU
32 Alternator 33 Starter motor 41 Main power battery 42 DC-DC converter 43 Motor peripheral accessories

Claims (12)

A sensor unit for detecting the voltage between the terminals of the lead acid battery;
A type determination unit for determining the type of the lead storage battery based on the detected voltage between the terminals;
With
The type determination unit
The type of the lead storage battery is determined based on the amount of change in the voltage between the terminals detected by the sensor unit within a predetermined period after the start of charging the lead storage battery.
Battery type determination device. The type determination unit
The type of the lead storage battery is determined based on the amount of change in the voltage between the terminals detected by the sensor unit within the predetermined period after the lead storage battery is switched from discharging to charging.
The battery type determination apparatus according to claim 1. The lead acid battery is
Supplying power to drive vehicle auxiliary equipment,
The type determination unit
The type of the lead storage battery is determined based on the amount of change in the voltage between the terminals detected by the sensor unit within the predetermined period after switching from discharge control to charge control of the lead storage battery at the start of the vehicle. ,
The battery type determination apparatus according to claim 1. The lead acid battery is
Supplying driving power for the starter motor in a vehicle in which the engine is started by driving the starter motor;
Switching from the discharge control to the charge control is a switch from the discharge control of the lead storage battery to the charge control at the start of the engine.
The battery type determination apparatus according to claim 3. The lead acid battery is
The power of the battery for the main power supply can be supplied by driving the auxiliary machine, and the electric power of the auxiliary machine in the electric vehicle in which the driving motor is started is supplied.
Switching from the discharge control to the charge control is a charge control from a discharge control of the lead storage battery at the start of the traveling motor.
The battery type determination apparatus according to claim 3. The type determination unit measures the time until the inter-terminal voltage changes to a predetermined threshold voltage as the change amount of the inter-terminal voltage.
The battery type determination apparatus according to claim 1. The type determination unit calculates a change amount of the inter-terminal voltage from the inter-terminal voltage at at least one timing within the predetermined period.
The battery type determination apparatus according to claim 1. The type determination unit calculates a rate of change of the inter-terminal voltage within the predetermined period as the amount of change of the inter-terminal voltage.
The battery type determination apparatus according to claim 1. An additional detector for detecting any one or more of the charge rate, open circuit voltage, and temperature of the lead acid battery;
The type determination unit further determines the type of the lead storage battery based on information including a detection result of the additional detection unit.
The battery type determination apparatus according to claim 1. The type determination unit
As a type of the lead storage battery, a lead storage battery for an idling stop system, a lead storage battery that is not for an idling stop system, and a low performance lead storage battery that is inferior in performance to a lead storage battery that is not for the idling stop system are determined.
The battery type determination apparatus according to claim 1. The type determination unit
It is determined that the performance is superior as the change in the voltage between the terminals is gentle,
The battery type determination apparatus according to claim 1. Detecting the voltage across the terminals of the lead acid battery;
A type determination step for determining the type of the lead storage battery based on the detected voltage between the terminals,
Including
The type determining step includes
Based on the amount of change in the inter-terminal voltage detected within a predetermined period after the start of charging of the lead storage battery, the type of the lead storage battery is determined.
Battery type determination method.

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