JP2012151997A - Vehicle battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle battery device that prevents theft at low-cost, and does not impair user friendliness.SOLUTION: Verification data acquired from the outside is verified with previously stored master data, when succeeding in verification, the operation mode is shifted from a normal mode which is a normal operation mode to an under battery exchange mode which is an operation mode in which the battery is exchangeable, the operation mode is stored, when the stored operation mode is the under battery exchange mode in mounting the battery, an operation involving driving of the vehicle is permitted, while when it is not the under battery exchange mode, the operation involving driving of the vehicle is not permitted.

Description

  The present invention relates to a battery device for a vehicle such as a hybrid vehicle or an electric vehicle.

  In addition to vehicles that run only on an engine, hybrid vehicles that use both the engine and motor as driving sources, and electric vehicles that run on motors are becoming widespread. In the case of a hybrid vehicle or an electric vehicle, a battery (for example, 288V equivalent) is mounted on the vehicle body, and a motor is driven using this as a drive source. By the way, since this kind of battery is expensive, there is no denying the possibility that the battery, not the vehicle itself, may be stolen.

  Therefore, it is determined whether or not the state value corresponding to the current use state of the battery is within the use permission range of the battery. If the state value exceeds the use permission range, it is determined that the battery is not being charged by a regular user. Thus, a technique for limiting the charging of the battery has been devised (see Patent Document 1).

JP 2008-042985 A

  In the configuration of Patent Document 1, since the battery pack includes a battery and a battery ECU that monitors the state of charge of the battery, there is a problem that the battery pack becomes expensive by the amount of the battery ECU. In addition, since the battery ECU is stolen at the same time, the battery ID code or the expiration date of the battery ID code may be falsified. Furthermore, there is a possibility that the battery pack is charged with only the battery of the battery pack replaced.

  In addition, since the charging is restricted when the current position is outside the specified range, charging is not possible when the return destination or travel destination is outside the specified range, which impairs user convenience. is there.

  Against the background of the above problems, an object of the present invention is to provide a vehicle battery device that can prevent theft at low cost and does not impair user convenience.

Means for Solving the Problems and Effects of the Invention

  A vehicle battery device for solving the above problems includes a collation data acquisition unit that obtains collation data from the outside, a collation unit that collates the acquired collation data with previously stored master data, and a collation unit An operation mode control unit that shifts the operation mode from the normal mode that is the normal operation mode to the battery replacement mode that is an operation mode in which the battery can be replaced, and an operation mode storage unit that stores the operation mode when collation is successful It is characterized by providing.

  With the above configuration, it is possible to prevent unauthorized replacement of the battery. In addition, since the battery pack includes only the battery and does not include the battery ECU, the cost can be reduced and the problem that the battery ID code or the expiration date of the battery ID code is falsified does not occur. Furthermore, the battery can be replaced regardless of the current position of the vehicle.

  Moreover, the operation mode memory | storage part in the battery apparatus for vehicles of this invention is comprised including a non-volatile memory.

  With the above configuration, the operation mode can be stored even when the battery is removed. Also, a backup battery is not required.

  The vehicle battery device according to the present invention includes a mounting state detection unit that detects a mounting state of the battery, and an operation mode stored in the operation mode storage unit when the mounting state detection unit detects the mounting of the battery. An operation permission unit that permits an operation related to traveling of the vehicle if in the replacement mode, and does not permit an operation related to traveling of the vehicle if the mode is not in the battery replacement mode.

  With the above configuration, it is possible to determine whether or not the battery has been replaced according to a regular procedure, and it is possible to prevent the use of the stolen battery and the unauthorized use of the vehicle.

  In the vehicle battery device of the present invention, power is supplied from the battery, and a power-on reset that occurs when the battery is attached is detected as attachment of the battery.

  With the above configuration, a backup battery is not required, and it is possible to detect battery mounting without adding new parts or circuits.

  In the vehicle battery device of the present invention, it is assumed that the mounting of the battery is detected when the power is supplied from the battery and the change in the power supply voltage generated when the battery is mounted is detected.

  Also with the above configuration, a backup battery is unnecessary, and it is possible to detect battery mounting without adding new parts or circuits.

  The vehicle battery device of the present invention further includes a replacement determination unit that determines whether or not the battery has been replaced when the mounting state detection unit detects the mounting of the battery, and the operation permission unit includes the replacement determination unit. When it is determined that the battery has been exchanged, if the operation mode stored in the operation mode storage unit is the battery replacement mode, the operation relating to the vehicle travel is permitted. Do not allow operations related to.

  With the above configuration, since the vehicle does not travel when the battery is simply removed / attached, unauthorized battery replacement can be prevented.

  The vehicle battery device of the present invention includes a charge state acquisition unit that acquires a charge state of the battery, and a charge state acquired by the charge state acquisition unit when the operation mode shifts from the normal mode to the battery replacement mode. A charging state storage unit that stores the charging state, and the charging state acquisition unit acquires the charging state of the mounted battery when detecting the mounting of the battery, and the replacement determination unit is stored in the charging state storage unit It is determined whether or not the battery has been replaced based on the state of charge and the state of charge acquired by the charge state acquisition unit when the attachment of the battery is detected.

  For example, in a hybrid vehicle or an electric vehicle, the state of charge of the battery is always grasped. With the above configuration, it is determined whether or not the battery has been replaced with a simple configuration and low cost without including a battery ECU in the battery pack or storing an ID code for identifying the battery on the battery side. It becomes possible.

  Further, the replacement determination unit in the vehicle battery device according to the present invention is calculated based on the charge state stored in the charge state storage unit and the charge state acquired by the charge state acquisition unit when the attachment of the battery is detected. When the difference in the amount of charge to the battery exceeds a predetermined threshold, it is determined that the battery has been replaced.

  When the battery is replaced according to a regular procedure, the amount of charge of the battery after replacement is considered to be close to a fully charged state. By calculating the difference in the charged amount of the battery before and after the replacement with the above configuration, it is possible to determine whether or not the battery has been replaced with a simple configuration.

The block diagram which shows the structure of the battery apparatus for vehicles. The flowchart explaining an operation mode transfer process. The flowchart explaining driving | running | working permission determination processing. The flowchart explaining another example of an operation mode transfer process. The flowchart explaining another example of a driving | running | working permission determination process.

  Hereinafter, the vehicle battery device of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration of a vehicle battery device 1 applied to a hybrid vehicle. The hybrid vehicle travels using both the engine 34 and the motor M as wheel drive sources. And, for example, a mode in which the power of the engine 34 is mechanically transmitted to the wheels, a mode in which power is generated by the engine power and the motor M is driven, and a mode in which the wheels are directly driven by both the engine 34 and the motor M. Then, the vehicle travels in various modes including a mode in which the engine is stopped and the motor M is traveled only.

  A motor M is connected to the travel control ECU 31 via an inverter 32, and an engine ECU 33 that performs ignition control and fuel injection control of the engine 34 via a vehicle LAN 30 is communicably connected. The travel control ECU 31 determines the engine output and motor torque according to the driving state according to the accelerator opening, shift position, and output signals from various sensors, and outputs the required values to the inverter 32 and the engine ECU 33 to control the driving force. To do.

  The vehicle battery device 1 includes a battery ECU 2, a verification terminal 21 connected to the battery ECU 2, a verification portable device 22 that can wirelessly communicate with the battery ECU 2, a battery 24, a relay 25, and a backup battery 26. .

  The battery ECU 2 receives a radio wave from the voltage sensor 3 that detects the voltage of the battery 24, I / O 4 that is a signal input / output circuit that exchanges signals with the outside of the battery ECU 2, and a portable device 22 for verification. 5, a memory 6 including a non-volatile storage medium such as a flash memory, a LAN I / F 7 which is a communication interface for communicating with other in-vehicle devices via the in-vehicle LAN 30, and these and a bus A microcomputer 10 connected via a line 8 and a connector 9 for connecting a signal line of the battery 24 are included. The I / O 4 and the receiver 5 correspond to the collation data acquisition unit of the present invention. The memory 6 corresponds to an operation mode storage unit and a charge state storage unit of the present invention.

  The microcomputer 10 includes a well-known CPU 11, ROM 12, RAM 13, and AD converter 14. The CPU 11 executes various processes by executing a control program stored in the ROM 12 and realizes the configuration of the present invention. To do. The microcomputer 10 corresponds to a verification unit, an operation mode control unit, a mounting state detection unit, an operation permission unit, and an exchange determination unit of the present invention.

  The verification terminal 21 is constituted by, for example, a personal computer, a portable information terminal called PDA, and the like, and is used for verification for battery replacement with the battery ECU 2 (details will be described later). In addition to the verification terminal 21, a memory card 23 (or a storage medium equivalent thereto) in which verification data is stored in advance may be used. In this case, the I / O 4 includes an interface circuit or a card reader for connecting these terminals or memory cards.

  The collation portable device 22 is used for collation for performing battery exchange with the battery ECU 2 by wireless communication (details will be described later).

  When the vehicle is provided with a keyless system that permits predetermined operations such as door locking / unlocking and engine start permission based on the result of bidirectional communication with the keyless operation key, It is good also as a structure which uses the portable device 22 also as a keyless operation key.

  When the vehicle is provided with a remote keyless entry system that receives a control signal transmitted from a remote operation key by a user operation and locks / unlocks the door based on the received control signal, The portable device 22 may be used as a remote operation key.

  The relay 25 is used to supply / shut off power from the battery 24 to the inverter based on a control command from the battery ECU 2.

  The battery 24 supplies power to the battery ECU 2, the travel control ECU 31, the inverter 32, and the engine ECU 33. Each ECU includes a voltage conversion circuit (also referred to as a power supply circuit) for converting the voltage of the battery 24 into a predetermined voltage for operating a circuit inside the ECU.

  The backup battery 26 is for supplying power when power cannot be supplied from the battery 24 to each part of the vehicle. The backup battery 26 may not be included.

  The vehicle battery device 1 of the present invention may be applied to an electric vehicle. In this case, in FIG. 1, the engine ECU 33 and the engine 34 are not included, and the travel control ECU 31 determines the motor torque according to the driving state according to the accelerator opening, the shift position, and the output signals from various sensors, and the inverter The driving force is controlled by outputting the required value to 32. Other configurations are the same as the configurations applied to the hybrid vehicle described above.

The operation mode transition process in the microcomputer 10 will be described with reference to FIG. This process is included in the above-described control program and is repeatedly executed at a predetermined timing. First, it is determined whether or not collation data has been acquired using at least one of the following (S11).
When the verification terminal 21 is connected to the battery ECU 2 and data is received from the verification terminal 21 via the I / O 4, it is determined whether or not the verification data is included in the received data, and the verification data Get this when it is included.
-When data is received from the collation portable device 22 via the receiver 5, it is determined whether or not the collation data is included in the received data, and this is obtained when the collation data is included. To do.
When the memory card 23 is connected or inserted, the verification data is acquired from the memory card 23.

  Next, when collation data is acquired (S11: Yes), the acquired collation data is collated with master data stored in advance in the memory 6 (S12). As a result of the collation, when the obtained collation data is different from the master data (S13: No), the operation mode is set to the normal mode that is the normal operation state (that is, the battery is not being replaced) (S23), and the operation on the memory 6 Store in the mode storage area (S24).

  On the other hand, as a result of the collation, when the obtained collation data matches the master data and the collation is successful (S13: Yes), the operation mode is set to a battery exchanging mode indicating that the battery is being exchanged (S14). Then, it is stored in the operation mode storage area on the memory 6 (S15).

  Next, the state of charge of the battery 24 is acquired based on the voltage of the battery 24 detected using the voltage sensor 3 (S16). As the charging state of the battery 24, either the charging rate or the charging power may be acquired. Then, the calculated charging state of the battery 24 is stored in the charging state storage area on the memory 6 as the charging state before battery replacement (S17).

Next, whether or not the removal of the battery 24 is detected is determined using any of the following.
When the configuration does not include the backup battery 26, the operation of the battery ECU 2 stops when the battery 24 is removed (it is considered that the battery 24 has been removed at this time), and the subsequent processing is not performed.
Whether or not removal of the battery 24 is detected based on the state of the connector 9 acquired via the I / O 4 or the voltage value of the battery 24 detected by the voltage sensor 3 in the configuration including the backup battery 26 judge.

  For example, the connector 9 is provided with a terminal whose state (voltage) changes according to the attachment / detachment of the battery 24, and the removal of the battery 24 is detected based on the state of the terminal. Alternatively, when the voltage value of the battery 24 detected by the voltage sensor 3 falls below a threshold value such as 0.5 V, it is determined that the battery 24 has been removed.

  In the configuration including the backup battery 26, when the removal of the battery 24 is detected (S18: Yes), this process is terminated. On the other hand, when the removal of the battery 24 is not detected (S18: No), it is determined whether or not a predetermined time has elapsed since the collation was successful. When the predetermined time has elapsed (S19: Yes), the above-described collation success is invalidated, the operation mode is returned to the normal mode (S20), and stored in the operation mode storage area on the memory 6 (S21). Then, the stored content of the pre-battery charge state stored in the charge state storage area on the memory 6 is cleared (S22).

The travel permission determination process in the microcomputer 10 will be described with reference to FIG. This process is included in the above-described control program and is repeatedly executed at a predetermined timing. First, it is determined using one of the following whether or not the timing for detecting the mounting of the battery 24 has arrived.
In the case of a configuration that does not include the backup battery 26, the battery ECU 2 is activated when the battery 24 is attached (that is, power-on reset), so this process may be performed within the initialization process of the battery ECU 2. Therefore, the attachment of the battery 24 is always detected.
In the configuration including the backup battery 26, whether or not the attachment of the battery 24 is detected based on the state of the connector 9 acquired through the I / O 4 or the voltage value of the battery 24 detected by the voltage sensor 3 is determined. For example, the determination is made at a constant cycle.

  When the timing for detecting the mounting of the battery 24 arrives (S31: Yes) and the mounting of the battery 24 is detected (S32: Yes), the contents of the operation mode storage area on the memory 6 are read (S33). Subsequently, it is determined whether or not the read operation mode is the battery replacement mode. If the battery replacement mode is selected (S34: Yes), the pre-battery charge stored in the charge state storage area on the memory 6 is determined. The stored content of the state is read (S35).

  Next, the current state of charge of the battery 24 (referred to as “charged state after battery replacement”) is obtained by the same method as in step S16 of FIG. 1 (S36). Then, the difference between the charged state after battery replacement and the charged state before battery replacement is calculated as the amount of charge to the battery 24 (S37).

  Next, when the calculated amount of charge exceeds the threshold value stored in advance in the memory 6 (S38: Yes), it is determined that the battery has been correctly replaced, and the traveling operation of the vehicle is permitted (S39). On the other hand, when the read operation mode is not the battery replacement mode (S34: No), or when the calculated charge amount is lower than the threshold (S38: No), it is determined that the battery replacement has been performed illegally, The travel operation is not permitted (S40).

Note that at least one of the following is used for permitting / disapproving the traveling operation of the vehicle.
-When permitting the traveling operation of the vehicle, the relay 25 is turned on in accordance with a command from the battery ECU 2. Further, when the travel operation of the vehicle is not permitted, the relay 25 is turned off.
When permitting the traveling operation of the vehicle, the battery ECU 2 sends an inverter drive permission signal to the traveling control ECU 31. Further, when the travel operation of the vehicle is not permitted, an inverter drive prohibition signal is sent to the travel control ECU 31. The travel control ECU 31 performs drive control of the inverter based on these signals.
When permitting the traveling operation of the vehicle, an engine start permission signal is sent from the battery ECU 2 to the engine ECU 33. When the vehicle travel operation is not permitted, an engine start prohibition signal is sent to the engine ECU 33. The engine ECU 33 performs engine start control based on these signals.

  In each process of FIG. 2 and FIG. 3, it is good also as a structure which does not implement permission / denial of the driving | running | working operation | movement of a vehicle based on charge amount. In this case, steps S16, S17, and S22 in FIG. 2 and steps S35 to S38 in FIG. 3 are not executed.

Also, if the amount of charge (the difference between the state of charge after battery replacement and the state of charge before battery replacement) is close to 0, for example 0 ± 5% of the full charge amount, the battery is simply removed for inspection In addition, the traveling operation of the vehicle may be permitted. In this case, the determination in step S38 is as follows.
When the calculated charge amount exceeds the threshold value, or when the difference between the charge states before and after the battery replacement is close to 0 as described above, the traveling operation of the vehicle is permitted.
・ In other cases, vehicle travel is not permitted.

  The verification code may be set separately for battery replacement (charging) and battery checking (not charging). Hereinafter, this configuration will be described with reference to FIGS. 4 and 5 are modifications of FIG. 2 and FIG. 3, respectively, only the differences will be described, the same processing steps will be given the same numbers, and detailed descriptions thereof will be omitted. .

  First, a modification of the operation mode transition process in FIG. 2 will be described with reference to FIG. When collation is successful (S13: Yes), it is determined whether or not the obtained collation code is “for battery replacement”, and when it is a “battery replacement” verification code (S131: Yes), the operation The mode is set to the battery replacement mode (S14). Then, this operation mode is stored in the memory 6 (S15).

  On the other hand, when the acquired verification code is not a “battery replacement” verification code (S131: No), it is determined whether it is “battery inspection” or not, and is a “battery inspection” verification code. When (S132: Yes), the operation mode is set to the battery checking mode (S133). Then, this operation mode is stored in the memory 6 (S15).

  On the other hand, when the verification fails (S13: No), or when the acquired verification code is not a “battery check” verification code (S132: No), the operation mode is set to the normal mode (S23). The operation mode is stored in the memory 6 (S24).

  A modification of the travel permission determination process in FIG. 3 will be described with reference to FIG. When the operation mode stored in the memory 6 is read (S33) and the operation mode is the battery replacement mode or the battery check mode (S34: Yes or S341: Yes), the pre-battery charge state stored in the memory 6 Is read (S35), and the current state of charge of the battery 24 ("charge state after battery replacement") is acquired (S36). Then, the difference between the charged state after battery replacement and the charged state before battery replacement is calculated as the amount of charge to the battery 24 (S37).

  When the operation mode is the battery replacement mode (S371: Yes), it is determined whether or not the calculated charge amount exceeds a threshold value stored in the memory 6 in advance (S38). And based on the determination result, permission / non-permission of travel operation of the vehicle is performed (S39, S40).

  On the other hand, when the operation mode is the battery checking mode (S371: No → S372: Yes), the calculated charge amount (difference between the charged state after battery replacement and the charged state before battery replacement) is 0 or 0 ± full charge. Determine if it is close to 0, such as 5% of the amount. When the calculated charge amount is close to 0 (S373: Yes), the traveling operation of the vehicle is permitted (S39).

  On the other hand, when the operation mode is not the battery checking mode (S341: No or S372: No), or when the operation mode is the battery checking mode and the calculated charge amount is not close to 0 (S373: No), the vehicle Is not permitted (S40).

  Although the embodiments of the present invention have been described above, these are merely examples, and the present invention is not limited to these embodiments, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications based on this are possible.

1 Vehicle Battery Device 2 Battery ECU
3 Voltage sensor 4 I / O (Data acquisition unit for verification)
5 Receiver (Data acquisition unit for verification)
6 Memory (operation mode storage unit, charge state storage unit)
7 LAN I / F
9 Connector 10 Microcomputer (Verification unit, operation mode control unit, wearing state detection unit, operation permission unit, replacement determination unit)
11 CPU
21 terminal for verification 22 portable device for verification 23 memory card 24 battery 25 relay 31 travel control ECU
33 Engine ECU

Claims (8)

A collation data acquisition unit for acquiring collation data from the outside;
A collation unit for collating the acquired collation data with pre-stored master data;
An operation mode control unit that shifts the operation mode from the normal mode that is the normal operation mode to the battery replacement mode that is an operation mode in which the battery can be replaced when the collation is successful by the collation unit;
An operation mode storage unit for storing the operation mode;
A vehicle battery device comprising:   The vehicle battery device according to claim 1, wherein the operation mode storage unit includes a nonvolatile memory. A mounting state detection unit for detecting a mounting state of the battery;
When the mounting state detection unit detects the mounting of the battery, if the operation mode stored in the operation mode storage unit is the battery replacement mode, an operation related to traveling of the vehicle is permitted, and the battery is being replaced. If it is not a mode, the operation permission unit that does not allow the operation related to the vehicle traveling,
The vehicle battery device according to claim 1, further comprising:   4. The vehicle battery device according to claim 3, wherein the vehicle battery device detects a power-on reset generated when the power is supplied from the battery and the battery is attached, and the attachment of the battery is detected. 5. .   4. The vehicle battery device according to claim 3, wherein the vehicle battery device detects mounting of the battery when power is supplied from the battery and a change in power supply voltage generated when the battery is mounted is detected. 5. Battery device. A replacement determination unit that determines whether or not the battery has been replaced when the mounting state detection unit detects the mounting of the battery;
The operation permission unit determines that the battery has been replaced in the replacement determination unit, and if the operation mode stored in the operation mode storage unit is the battery replacement mode, an operation related to traveling of the vehicle 6. The vehicle battery device according to claim 3, wherein an operation relating to traveling of the vehicle is not permitted unless the battery replacement mode is set. A charge state acquisition unit for acquiring a charge state of the battery;
A charge state storage unit that stores the charge state acquired by the charge state acquisition unit when the operation mode shifts from the normal mode to the battery replacement mode;
With
The charging state acquisition unit acquires the charging state of the mounted battery when detecting the mounting of the battery,
The replacement determination unit replaces the battery based on the charge state stored in the charge state storage unit and the charge state acquired by the charge state acquisition unit when the attachment of the battery is detected. The vehicle battery device according to claim 6, wherein it is determined whether or not the vehicle battery has been used.   The replacement determination unit is calculated based on a charging state stored in the charging state storage unit and a charging state acquired by the charging state acquisition unit when the attachment of the battery is detected. The vehicle battery device according to claim 7, wherein it is determined that the battery has been replaced when a charge amount of the battery exceeds a predetermined threshold value.

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