JP2013109628A - Id provision system and id provision method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress generation of a communication error and an incorrect action and provide IDs to slave units in a system composed of a master device and a plurality of slave devices.SOLUTION: A plurality of CS 28 are connected to a BMU 14 at communication lines 52, 54, and are daisy chain connected at a power supply line 56. The BMU 14 has an ID provision control unit 58 which outputs an ID clear command and subsequently outputs different ID information after outputting the ID clear command. The CS 28 has a change-over switch 34, a memory 38 for storing IDs, and a memory control unit 36 which, operating on power provided by a power source input terminal PI, turns off the change-over switch 34 on condition that the ID clear command is accepted, and stores an ID in its own memory 38 on the basis of the supplied ID information and turns on the change-over switch 34 when no ID is allocated yet.

Description

  The present invention relates to a technique for assigning an ID.

  In a system configured to include a master device and a plurality of slave devices, generally, a method is used in which each slave device is assigned an individual ID, and the master device identifies each of the plurality of slave devices using this ID. ing. Conventionally, in such a system, a technique in which a master device gives an ID to each slave device is known (for example, Patent Document 1). In the prior art, a plurality of slave devices are cascade-connected to a master device, and switch means is arranged on a signal line between the slave devices. According to this prior art, when assigning an ID to a slave device, the terminal device that is the subject of the ID assignment can be identified by switching the connection state of the signal line between the slave devices by the switch means. It is said that ID can be given to the slave device without increasing the number of lines.

JP 2006-133996 A

  However, if the switch means is arranged on the signal line, it is easily affected by noise or the like when switching the connection state, causing a problem that a communication error or malfunction occurs. In addition, if the switch means is arranged on the signal line, it is necessary to synchronize the signals when the signal line is switched to the connected state, and the communication speed cannot be increased due to the long on / off switching time of the switch means. There was a problem.

  The present invention has been made in view of the above situation, and in a system configured to include a master device and a plurality of slave devices, the occurrence of communication errors and malfunctions is suppressed, and IDs are assigned to the slave devices. It is to provide a technique for providing

  The present invention is an ID assigning system comprising a master device and a plurality of slave devices connected to signal terminals of the master device, and assigning an ID to each slave device, wherein the master device is the slave device A power output terminal that outputs power to the device, an ID assignment command, and an ID assignment control unit that sequentially outputs different ID information from the signal terminal after the output of the ID assignment command. A power input terminal for receiving power, a power output terminal for outputting power, a storage unit for storing the ID, switching means provided between the power output terminal and the power input terminal, and the power input It operates based on the power supplied from the terminal, turns off the switching means on condition that the ID assignment command is received, A storage control unit for storing the ID in its storage unit based on the given ID information and turning on the switching means based on the given ID information when the ID is not yet allocated, and the power supply of the master device Connect the output terminal to the power input terminal of the one slave device and connect the power output terminal of the one slave device to the power input terminal of another slave device from the power output terminal of the master device. A power supply line is daisy chain connected to each of the slave devices.

  In this ID assigning system, when an ID assigning command is given from the master device, the switching means of all slave devices are turned off, so that the power input terminal of the plurality of slave devices is directly connected to the power output terminal of the master device. Only the most recent slave device connected to is active. Accordingly, when ID information is output from the master device thereafter, the ID is stored in its own storage unit based on the ID information by the storage control device of the slave device. At the same time, since the switching means of the slave device is turned on, the next slave device connected in the daisy chain becomes the operating state, and subsequently continues to the storage unit of the next slave device based on the next ID information given from the master device. The ID is stored, the switching means of the slave device is turned on, and preparations for supplying power to the next slave device are completed. At this time, since the ID is already allocated in the slave device in the previous stage, the ID is not allocated again by the storage control unit. By repeating this, IDs are sequentially assigned to all slave devices.

  In the above configuration, the switching means is provided in the power supply line connecting the plurality of slave devices in a daisy chain, and the power supply line generally has an extremely low impedance compared to the signal line, so that it has excellent noise resistance, as in the prior art. Compared with the case where the connection state of the signal line is switched, the occurrence of communication errors and malfunctions can be suppressed. In the above configuration, since the connection state of the signal line is not switched, the communication speed can be increased as compared with the case where the connection state of the signal line is switched as in the prior art. According to this system, communication errors and malfunctions can be suppressed, and the communication speed can be increased to give each slave device an ID.

  In the ID assigning system, the storage control unit outputs an ID determination command from the signal terminal to the master device on the condition that the ID is stored in the storage unit based on the given ID information. It is good also as a structure. The master device can detect that an ID is assigned to any slave device by the given ID determination command.

  In the ID assigning system, the master device has a power input terminal that receives power returned from the slave device, and the power supply line is daisy chained farthest from the power output terminal of the master device. The power supply output terminal of the slave device may be connected to the power supply input terminal of the master device, and the power supply line may be circularly connected to the master device and each slave device.

  According to this ID assigning system, when power is returned to the power input terminal, the master device assigns an ID to the slave device that is daisy chained farthest from the power output terminal of the master device in the power supply line. Can be detected. As a result, it is possible to detect that IDs have been assigned to all the slave devices, and it is possible to detect the end timing of ID assignment.

  In the ID assigning system, the storage control unit may reset the ID stored in the storage unit and set a default value on condition that the ID assigning command is received. Thereby, even if the ID is stored in advance in the storage unit of each slave device, the ID can be reset and an ID based on the ID information output from the master device can be given to each slave device. In addition, by checking whether or not the ID stored in the storage unit is a default value, it is possible to easily detect whether or not an ID has already been allocated.

  In the ID assignment system, each slave device is a cell monitoring device (hereinafter referred to as CS) that monitors an assembled battery made up of a plurality of single cells, and the master device receives a plurality of signals according to signals input from the CS. It is good also as a structure which is a battery manager unit (henceforth BMU) which manages the battery pack which consists of the said assembled battery.

  A chargeable / dischargeable secondary battery may be used as a battery pack including a plurality of assembled batteries according to a desired output voltage. In the BMU that controls the battery pack, it is necessary to assign an ID to the CS that monitors each assembled battery in order to individually manage each assembled battery or each single battery included in each assembled battery. According to this ID assigning system, in a network including a BMU and a plurality of CSs connected to the signal terminals of the BMU in a bus form, an ID is assigned to each CS while suppressing occurrence of communication errors and malfunctions. Can do.

  Said ID provision system is good also as a structure mounted and used for a vehicle. In places where high reliability is required, such as vehicles, communication errors and malfunctions can be suppressed, IDs can be assigned to each CS, and each assembled battery can be monitored using the IDs.

  The present invention is also embodied in an ID assigning method for assigning an ID to each slave device in a network including a master device and a plurality of slave devices connected in a bus form to signal terminals of the master device. . In this ID assigning method, a slave selection step of selectively supplying power from the master device to each of the slave devices to set the single slave device in an operating state; and from the signal terminal of the master device ID setting step for outputting ID information to each slave device and setting its own ID based on the ID information in the slave device in an operating state, the slave device selected in the slave selection step Are sequentially changed, and the ID setting step is repeated so that the ID information changes sequentially.

  In this ID assigning method, when setting an ID for each slave device, a slave device that supplies (provides) an ID is specified by specifying a slave device that supplies power. In this ID assigning method, it is possible to assign an ID to each slave device while suppressing the occurrence of communication errors and malfunctions, as compared with the case where the connection state of the signal lines is switched as in the prior art.

  ADVANTAGE OF THE INVENTION According to this invention, generation | occurrence | production of a communication error or malfunction can be suppressed and ID can be provided to a slave apparatus in the system comprised including a master apparatus and several slave apparatus.

Battery pack block diagram The figure which shows the connection between BMU and CS of Embodiment 1. Diagram showing the configuration of the changeover switch Flowchart of ID assigning process of embodiment 1 Flowchart of ID assigning process of embodiment 1 The figure which shows the connection between BMU and CS of Embodiment 2. Flowchart of ID assignment processing of embodiment 2 Flowchart of ID assignment processing of embodiment 2

<Embodiment 1>
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 5.
1. Configuration of Battery Pack FIG. 1 is a diagram illustrating a configuration of a battery pack 10 of the present embodiment. The battery pack 10 is an in-vehicle battery pack used for a hybrid vehicle or an electric vehicle, and includes three battery modules 12 and a battery manager unit (an example of a master device) that manages these battery modules 12. Hereinafter, it has a BMU) 14 and a current sensor 16. Each battery module 12 includes an assembled battery 22 and a cell monitoring unit (an example of a slave device, hereinafter referred to as CS) 28 in which a voltage measurement circuit 24, a temperature sensor 26, and the like are formed. The CS 28 measures each voltage value V of the plurality of secondary batteries 30 constituting the corresponding assembled battery 22, measures the temperature T of the assembled battery 22, and monitors the corresponding assembled battery 22. Hereinafter, each secondary battery constituting the assembled battery 22 is referred to as a single battery 30.

  In the battery pack 10, a plurality of assembled batteries 22 included in the plurality of battery modules 12 are connected to each other using wires 42, and a charging unit (load) 46 outside the battery pack 10 is connected via a connection terminal 44. These assembled batteries 22 are charged (discharged). The current sensor 16 measures a current value I of a current flowing through the wiring 42, that is, a current flowing in common to the plurality of assembled batteries 22.

  The BMU 14 is connected to the CS 28 of each battery module 12 via the communication lines 52 and 54 and receives the voltage value V and the temperature T measured by each CS 28. The BMU 14 is connected to the current sensor 16 and receives the current value I measured by the current sensor 16. The BMU 14 individually manages each battery module 12 using these received measurement values, and aims to increase the efficiency of charging (discharging) the plurality of assembled batteries 22 included in the battery pack 10. At this time, the BMU 14 assigns an ID to the CS 28 of each battery module 12 included in the battery pack 10 and manages each battery module 12 individually using this ID.

2. Next, the connection of the communication lines 52 and 54 and the power supply line 56 between the BMU 14 and the CS 28 will be described with reference to FIG.
The BMU 14 and each CS 28 perform CAN communication that is differential communication, and each include signal terminals CAN H and CAN L, a power input terminal PI, and a power output terminal PO.

(Communication line)
The signal terminal CAN H of the BMU 14 is connected to the signal terminal CAN H of each CS 28 via the communication line 52, and the signal terminal CAN L of the BMU 14 is connected to the signal terminal CAN L of each CS 28 via the communication line 54. Has been. Each CS 28 is bus-type connected to the BMU 14 by communication lines 52 and 54. The BMU 14 and each CS 28 receive and transmit various signals as differential signals using the communication lines 52 and 54.

(Power line)
The power output terminal PO of the BMU 14 is connected to the power input terminal PI of the CS 28A arranged adjacent to the BMU 14 via the power line 56. The power output terminal PO of the CS 28 is connected to the power input terminal PI of another CS 28 arranged adjacent to the CS 28 via the power line 56. As a result, the BMU 14 is daisy chain connected to each CS 28 by the power supply line 56.

  Further, the power input terminal PI of the BMU 14 is connected via the power line 56 to the power output terminal PO of the CS 28C that is daisy chained farthest from the power output terminal PO of the BMU 14. That is, the BMU 14 and each CS 28 are circularly connected by the power supply line 56.

  The BMU 14 outputs power supplied from an external power source (not shown) to the CS 28 connected to the daisy chain from the power output terminal PO, and the CS 28 performs various operations by the power input from the power input terminal PI. . That is, it can be said that the BMU 14 outputs power for the operation of the CS 28 from the power output terminal PO.

  In CS28, a changeover switch (an example of switching means) 34 is connected between a power supply input terminal PI and a power supply output terminal PO. As shown in FIG. 3, the changeover switch 34 can be configured using, for example, a resistor R and a transistor FET. In CS28, when the voltage of the input terminal G becomes low and the changeover switch 34 is turned on under the control of the CPU 32 described later, a part of the input power is output from the power supply output terminal PO. The other CSs 28 connected to the power output terminal PO perform various operations using the power input from the power input terminal PI. That is, it can be said that the CS 28 outputs power for the operation of another CS 28 from the power output terminal PO. In addition, the BMU 14 connected to the power output terminal PO receives power return from the power input terminal PI. On the other hand, when the voltage of the input terminal G becomes high and the changeover switch 34 is turned off under the control of the CPU 32, the CS 28 stops power output from the power output terminal PO.

(BMU internal configuration)
The BMU 14 includes a CPU 48. The CPU 48 includes a memory 60 such as a ROM or a RAM. The memory 60 stores various programs for controlling the current sensor 16 and controlling each battery module 12 individually. Based on the program read from the memory 60, the CPU 48 functions as, for example, the ID assignment control unit 58 and transmits various commands and information for assigning different IDs to the CS 28 of each battery module 12 to each CS 28.

(Internal structure of CS)
Each CS 28 includes a CPU 32. Each CPU 32 includes a memory (an example of a storage unit) 38 such as a ROM or a RAM, and the memory 38 controls various components of the battery module 12 including the voltage measurement circuit 24 and the temperature sensor 26. Is stored. The CPU 32 functions as, for example, the storage control unit 36 based on the program read from the memory 38, switches the state of the changeover switch 34 based on various commands and information input from the BMU 14, and stores the ID in the memory 38. The ID determination command indicating that the ID is stored is transmitted to the BMU 14 and the ID stored in the memory 38 is reset.

3. ID assignment process An ID assignment process performed when an ID is assigned to the CS 28 of each battery module 12 will be described with reference to FIGS. 4 and 5. FIG. 4 shows a flowchart of ID assignment processing executed by the CPU 48 of the BMU 14 and the CPU 32 of each CS 28. When starting the ID assigning process, the CPU 48 transmits an ID clear command (an example of an ID assigning command) to each CPU 32 (S2).

  Upon receiving the ID clear command (S4), each CPU 32 starts the ID assigning process and resets the ID stored in the corresponding memory 38 to the default value on condition that the ID clear command is received. Set (S6). Each CPU 32 switches the corresponding changeover switch 34 to the OFF state when the ID stored in the memory 38 is set to the default value (S8). That is, by transmitting the ID clear command from the CPU 48, the ID is set to the default value in all the CSs 32 included in the battery pack 10, and the changeover switch 34 is turned off. As a result, the power is input to the CS 28A in which the power input terminal PI is connected to the power output terminal PO of the BMU 14 and the operation state is maintained, and the power is not input to the CS 28B and 28C (S10). ). That is, among the plurality of CSs 32 included in the battery pack 10, power is supplied only to the CS 28A, and only the CS 28A is in an operating state.

  After transmitting the ID clear command, the CPU 48 transmits ID information to each CPU 32 (S12). The ID information includes an ID for giving to the CS 28. Thereafter, the CPU 48 sequentially transmits ID information whose ID has been changed every time an ID determination command (described later) is received. In S12, ID information including ID1 as ID is transmitted.

  The CPU 32 of the CS 28A in the operating state receives the ID information transmitted from the CPU 48 (S14), while the CPU 32 of the CS 28B and 28C in the stopped state cannot receive the ID information transmitted from the CPU 48. When receiving the ID information, the CPU 32 of the CS 28A checks whether or not the ID stored in the corresponding memory 38 is a default value. When the ID stored in the memory 38 is the default value, that is, when the ID is not yet allocated to the CS 28A, the CPU 32 of the CS 28A stores the ID 1 included in the received ID information in the corresponding memory 38. (S16). Thereby, ID1 is allocated to CS28A.

  The CPU 32 of the CS 28A stores ID1 in the memory 38, and the corresponding changeover switch 34 on condition that the ID stored in the memory 38 is different from the default value (that is, the ID is allocated). Is switched on (S18). Thereby, in CS28B in which the power supply input terminal PI is connected to the power supply output terminal PO of CS28A, power is input from CS28A to start the operation (S20), and the operation state is switched. Further, the CPU 32 of the CS 28A transmits an ID determination command to the BMU 14 on the condition that the ID is allocated (S22).

  When the CPU 48 receives the ID determination command (S24), it transmits the next ID information to each CPU 32 (S26). In S26, ID information including ID2 as ID is transmitted. The CPU 32 of the CS 28A in the operating state receives the ID information transmitted from the CPU 48 (S28). However, in the CS 28A, since the ID stored in the memory 38 is not a default value and an ID is already allocated, the received ID information is ignored (S30). That is, the CPU 32 of the CS 28A does not store ID2 included in the ID information in the corresponding memory 38. Further, the CPU 32 of the CS 28C in the stopped state cannot receive the ID information transmitted from the CPU 48.

  On the other hand, the CPU 32 of the CS 28B that has been switched to the operating state receives the ID information transmitted from the CPU 48, and stores the ID 2 included in the ID information in the corresponding memory 38. The processing of S34 through S42 executed by the CPU 32 of the CS 28B is the same as the processing of S14 through S22 executed by the CPU 32 of the CS 28A, and redundant description is omitted. As a result, the CS 28C switches to the operating state, and when the CPU 48 receives the ID determination command (S44), it outputs the next ID information to each CPU 32 (S46). In S46, ID information including ID3 is output as the ID.

  The CPU 32 of the operating CSs 28A and 28B receives the ID information transmitted from the CPU 48 (S48). However, in the CSs 28A and 28B, the ID stored in the memory 38 is not a default value, and an ID is already allocated, so the received ID information is ignored (S50). On the other hand, the CPU 32 of the CS 28C switched to the operating state receives the ID information transmitted from the CPU 48, and stores ID 3 included in the ID information in the corresponding memory 38. The processing of S54 to S62 executed by the CPU 32 of the CS 28C is the same as the processing of S14 to S22 executed by the CPU 32 of the CS 28A, and redundant description is omitted. As a result, IDs are assigned to all the CSs 32 included in the battery pack 10, and the changeover switch 34 is turned on.

  When the changeover switch 34 of the CS 28C is turned on, part of the power output by the BMU 14 is returned from the power output terminal PO of the CS 28C to the power input terminal PI of the BMU 14. As a result, the CPU 48 of the BMU 14 detects that IDs have been allocated to all the CSs 28 that are daisy chain connected to the power supply line 56 (S60). When the CPU 48 receives the ID determination command after the power is returned (S64), the ID assignment process is terminated.

4). Advantages of the present embodiment (1) In the battery pack 10 of the present embodiment, the changeover switch 34 is provided in the power supply line 56 that connects a plurality of CSs 28 in a daisy chain. Since the power line 56 generally has a very low impedance compared to the signal lines such as the communication lines 52 and 54, it is excellent in noise resistance, and communication errors and The occurrence of malfunction can be suppressed. Further, since the connection state of the signal lines such as the communication lines 52 and 54 is not switched, the communication speed can be increased as compared with the case where the connection state of the signal lines is switched as in the prior art. According to the battery pack 10 of the present embodiment, communication errors and malfunctions can be suppressed, and the communication speed can be increased to give each CS 28 an ID.

(2) In the battery pack 10 of this embodiment, ID information is transmitted using the communication line 52, and a dedicated line for transmitting ID information is not required. As a result, the wiring of the battery pack 10 is prevented from becoming complicated, and the manufacturing cost of the battery pack 10 can be reduced.

(3) In the battery pack 10 of the present embodiment, when an ID is stored in the memory 38 in each CS 28, an ID determination command is output from the CS 28 to the BMU 14. Therefore, when the BMU 14 receives the ID determination command, the BMU 14 can detect that an ID has been assigned in any CS 28 and can detect the timing for outputting the next ID information.

(4) In the battery pack 10 of this embodiment, when a part of the power output from the BMU 14 is converted to the power input terminal PI of the BMU 14, all the CSs 28 that are daisy chain connected to the power line 56 are ID-connected. Can be detected, and the end timing of ID assignment can be detected.

(5) In the battery pack 10 of the present embodiment, when the CPU 32 of each CS 28 receives the ID clear command, the ID stored in the corresponding memory 38 is reset and set to a default value. Thereby, even if the ID is stored in advance in the memory 38 of each CS 28, the ID can be reset and an ID based on the ID information output by the BMU 14 can be assigned to each CS 28. In addition, it is possible to easily detect whether or not an ID is assigned depending on whether or not the ID stored in the memory 38 is a default value. Therefore, the state of the changeover switch 34 can be easily switched.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to FIGS. In this embodiment, the changeover switch 62 for switching whether or not to output power to the CS 28 of each battery module 12 is different from the battery pack 10 of the first embodiment in that the switch 62 is provided not in each CS 28 but in the BMU 14. The BMU 14 can selectively supply power to each CS 28 by switching the changeover switch 62. In the battery pack 10 of the present embodiment, power is supplied using the battery pack 10 to be in an operating state. An ID is set for a single CS. Below, the description which overlapped about the same content as Embodiment 1 is abbreviate | omitted.

1. Configuration of Battery Pack As shown in FIG. 6, the BMU 14 includes signal terminals CAN H and CAN L and a plurality of power output terminals PO, and each CS 28 includes signal terminals CAN H and CAN L and a power input terminal. PI. Each power output terminal PO of the BMU 14 is individually connected to the power input terminal PI of each CS 28 via the power line 56, and power supplied from an external power source (not shown) is supplied from the power output terminal PO to each CS 28. Is output.

  The CPU 48 of the BMU 14 controls the changeover switch 62 to output power from all the power output terminals PO among the plurality of power output terminals PO, and to output power from one selected power output terminal PO. And the power output terminal PO that outputs the power can be switched. Thereby, in the battery pack 10, electric power can be alternatively supplied to the plurality of CSs 32 included in the battery pack 10, and only the single CS 28 can be set in an operating state.

2. ID assignment processing FIGS. 7 and 8 are flowcharts of the ID assignment processing of the present embodiment.
After transmitting the ID clear command, the CPU 48 switches the changeover switch 62 to switch to a state in which power is output only from the power output terminal POA (S72). As a result, only a single CS 28A connected to the power output terminal POA is in an operating state, and the other CSs 28B and 28C are in a stopped state (S74). Thereafter, the CPU 48 transmits ID information to each CPU 32 (S12). As a result, the CPU 32 of the operating CS 28A receives the ID information transmitted from the CPU 48 and stores ID 1 included in the ID information in the corresponding memory 38 (S16).

  Next, when receiving the ID determination command (S24), the CPU 48 switches the power output terminal PO that outputs power to the power output terminal POB (S76). As a result, only a single CS 28B connected to the power output terminal POB is activated (S78), and the CS 28A is switched to a stopped state (S80). The CPU 48 repeats the above processing until all the power output terminals POA, POB and POC of the BMU 14 are selected once, and when all the power output terminals PO are selected once, all the power output The state is switched to a state in which power is output from the terminal PO (S88, 90), and the ID assigning process is terminated.

3. Effects of this Embodiment In the battery pack 10 of this embodiment, when assigning an ID to each CS 28, the CS 28 that supplies power is specified by using the changeover switch 62, thereby specifying the CS 28 that gives the ID. In this battery pack 10, it is possible to assign an ID to each slave device while suppressing the occurrence of communication errors and malfunctions as compared with the case where the connection state of the signal lines is switched as in the prior art.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and the drawings, and for example, the following various aspects are also included in the technical scope of the present invention.
(1) In the above embodiment, an example is shown in which the BMU 14 has one CPU 48 and each CS 28 has one CPU 32, which cooperate to execute ID assignment processing. Not limited. For example, one CPU 48 included in the BMU 14 may perform not only the process on the BMU 14 side in the ID assignment process but also the process on each CS 28 side.

(2) In the above embodiment, the description has been given using the battery pack 10 in which the three battery modules 12 are accommodated. However, the number of the battery modules 12 accommodated in the battery pack 10 is not limited thereto. Absent. Depending on the voltage required for the battery pack 10, two battery modules 12 may be accommodated in the battery pack 10, or four or more battery modules 12 may be accommodated in the battery pack 10.

(3) In the above embodiment, the master device is the BMU 14 and the slave device is CS28. However, the system to which the present invention is applicable is not limited to this, and the master device As long as the system executes ID assigning processing in a network in which a plurality of slave devices connected in a bus form to the signal terminals of the master device are used, the present invention can be applied to other systems.

(4) In the above embodiment, the power input terminal PI of the BMU 14 is connected to the power output terminal PO of the CS 28C that is daisy chained farthest from the power output terminal PO of the BMU 14 via the power line 56. As described above, the power input terminal PI of the BMU 14 and the power output terminal PO of the CS 28C are not necessarily connected. In this case, instead of detecting that the power has been converted, the CPU 48 of the BMU 14 transmits all the ID information and the ID determination command is not received, but all of the power supply lines 56 that are daisy chain connected. It may be detected that an ID is assigned to CS 28.

(5) Although the above embodiment has been described using an example in which the BMU 14 and each CS 28 are CAN-communication using the communication lines 52 and 54, the communication method is not limited to CAN communication. For example, a differential communication other than CAN communication may be used, or a communication format other than differential communication such as LIN communication may be used. Corresponding to the change in the communication format, for example, one of the communication lines 52 and 54 is a communication line that transmits a signal to the CS 28, and the other of the communication lines 52 and 54 is a communication line that transmits a signal to the BMU 14. It may be provided as follows. Furthermore, in the case of a communication form in which transmission / reception is possible with one communication line, only one communication line may be provided. Thereby, the wiring of the battery pack 10 is further simplified, and the manufacturing cost of the battery pack 10 can be further reduced.

10: battery pack, 12: battery module, 14: BMU, 22: assembled battery, 28: CS, 32: CPU, 34, 62: changeover switch, 36: storage controller, 38: memory, 48: CPU, 52, 54: communication line, 56: power supply line, 58: ID assignment control unit, 60: memory, CAN H, CAN L: signal terminal: signal output terminal, PI: power input terminal, PO: power output terminal

Claims (7)

An ID granting system comprising a master device and a plurality of slave devices connected to signal terminals of the master device, and assigning IDs to the slave devices,
The master device is
A power output terminal for outputting power to the slave device;
An ID assignment command, and an ID assignment control unit that sequentially outputs different ID information from the signal terminal after the output of the ID assignment command,
Each slave device is
A power input terminal for receiving power,
A power output terminal for outputting power;
A storage unit for storing the ID;
Switching means provided between the power output terminal and the power input terminal;
The ID information that operates based on the power supplied from the power input terminal, turns off the switching means on condition that the ID assignment command is received, and is provided when the ID is not yet allocated. A storage control unit that stores an ID in its storage unit based on the above and turns on the switching means, and
Connecting the power output terminal of the master device to the power input terminal of the one slave device and connecting the power output terminal of the one slave device to the power input terminal of another slave device. An ID assigning system in which a power line from the power output terminal is daisy chain connected to each slave device. The ID assigning system according to claim 1,
The storage control unit outputs an ID determination command from the signal terminal to the master device on the condition that the ID is stored in the storage unit of the storage control unit based on the given ID information. The ID assigning system according to claim 1 or 2,
The master device has a power input terminal that receives power returned from the slave device, and the power output terminal of the slave device is daisy chained farthest from the power output terminal of the master device in the power line. Is connected to the power input terminal of the master device, and the power supply line is annularly connected to the master device and each slave device. It is an ID provision system as described in any one of Claim 1 or Claim 3, Comprising:
The said storage control part resets the said ID memorize | stored in the said memory | storage part on condition that the said ID provision command is received, ID setting system which sets a default value. An ID assignment system according to any one of claims 1 to 4,
Each of the slave devices is a cell monitoring unit that monitors an assembled battery composed of a plurality of single cells,
The ID assignment system, wherein the master device is a battery-manager unit that manages a battery pack including a plurality of the assembled batteries according to a signal input from the cell monitoring unit. The ID assigning system according to claim 5,
The ID assigning system is an ID assigning system used by being mounted on a vehicle. In a network including a master device and a plurality of slave devices bus-connected to signal terminals of the master device, an ID assigning method for assigning an ID to each slave device,
A slave selection step of selectively supplying power to each slave device from the master device to bring the single slave device into an operating state;
ID setting step of outputting ID information to each slave device from the signal terminal of the master device and setting its own ID based on the ID information in the slave device in an operating state, the slave selection An ID assigning method that repeats so that the slave devices selected in the step are sequentially changed and the ID information is sequentially changed in the ID setting step.

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