JP2013077520A - Storage battery device, and method and program for controlling storage battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve ease of use of a battery pack monitoring device by reducing activation waiting time thereof.SOLUTION: A storage battery device of an embodiment includes: a plurality of battery pack groups; a plurality of monitoring devices that respectively correspond to the battery pack groups, perform monitoring of the corresponding battery pack groups, and are connected in series by a signal line; and a management device that controls and manages the plurality of monitoring devices. When activation is instructed by the management device, identification code acquiring means of each of the monitoring devices acquires identification codes for identifying the monitoring devices from the management device. Upon completion of the acquisition of the identification codes, signal output means outputs via the signal line a signal to urge operation start of the identification code acquiring means in the monitoring device on the next stage.

Description

  Embodiments described herein relate generally to a storage battery device, a storage battery device control method, and a control program.

In recent years, the use of storage batteries in large-scale power storage systems has been studied due to advances in storage battery technologies such as lithium ion secondary batteries.
For example, in a storage battery device mounted on a vehicle such as an electric vehicle, the number of secondary battery modules may be about several tens.

In such a storage battery device, when a plurality of secondary battery modules are connected to one communication bus, the assembled battery management device (BMU; Battery Management Unit) is connected to each assembled battery monitoring device (CMU; Cell Monitoring Unit). It is necessary to identify and handle information.
In such a case, instead of predetermining the identification code (identification number) of each secondary battery module before assembling the storage battery device, a mechanism in which the identification code is automatically assigned after assembling is disclosed in Patent Document 1 is disclosed.

JP 2010-141971 A

By the way, when the assembled battery monitoring device is connected in a daisy chain and the activation signal of the power supply is sequentially transmitted, the activation signal is always transmitted after the assembled battery monitoring device is powered on. For this reason, it is necessary to wait for the propagation of the activation signal connected in a daisy chain every time it is activated.
It usually takes about 100 ms for the operation of the assembled battery monitoring device to start after the power is turned on. For example, when 30 secondary battery modules are connected in a daisy chain, all the assembled battery monitoring devices are activated. It will take at least 3 seconds to complete.
In the case of an electric vehicle, for example, it takes many seconds from when the user starts the vehicle until it can actually run, and there is a problem that it is not easy to use.
The present invention has been made in view of the above, and provides a storage battery device, a storage device control method, and a control program that can improve the usability by reducing the activation waiting time of the assembled battery monitoring device.

The storage battery device according to the embodiment corresponds to each of a plurality of assembled battery groups and the assembled battery group, monitors the corresponding assembled battery group, a plurality of monitoring devices connected in series with a signal line, and a plurality of monitoring devices A management device that controls and manages the device.
Then, the identification code acquisition unit of the monitoring device acquires an identification code for identifying the monitoring devices from the management device when the management device instructs activation.
The signal output means outputs a signal prompting the start of operation of the identification code acquisition means in the monitoring device at the next stage via the signal line when acquisition of the identification code is completed.

FIG. 1 is a schematic configuration block diagram of a storage battery system including the storage battery device of the embodiment. FIG. 2 is an explanatory diagram of a main part of the embodiment. FIG. 3 is an explanatory diagram of a schematic configuration of the CMU. FIG. 4 is a process flowchart of the automatic numbering process of the CAN_ID of the BMU according to the embodiment. FIG. 5 is a processing timing chart of the embodiment. FIG. 6 is a process flowchart of the CMU CAN_ID automatic numbering process according to the embodiment. FIG. 7 is an explanatory diagram of a modification.

Next, the storage battery device of the embodiment will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration block diagram of a storage battery system including the storage battery device of the embodiment.
The storage battery system 10 can be broadly divided into a storage battery device 11 that stores electric power, and a power conversion device (PCS: Power Conditioning System) 12 that converts DC power supplied from the storage battery device 11 into desired AC power and supplies it to a load. And.

The storage battery device 11 roughly includes a plurality of battery boards 21-1 to 21-N (N is a natural number) and a battery terminal board 22 to which the battery boards 21-1 to 21-N are connected. .
The battery boards 21-1 to 21-N include a plurality of battery units 23-1 to 23-M (M is a natural number) connected in parallel to each other, a gateway device 24, a BMU (Battery Management Unit) and a CMU described later. And a DC power supply device 25 that supplies a DC power supply for operation to (Cell Monitoring Unit).

Here, the configuration of the battery unit will be described.
The battery units 23-1 to 23-M are connected to output power via a high potential power supply line (high potential power supply line) LH and a low potential power supply line (low potential power supply line) LL, respectively. Lines (output power supply lines; bus lines) LHO and LLO are connected to supply power to the power converter 12 that is the main circuit.

Further, since the battery units 23-1 to 23-M have the same configuration, the battery unit 23-1 will be described as an example.
The battery unit 23-1 is roughly classified into a plurality of cell modules 31, a plurality of CMUs (monitoring devices) 32 provided in the cell modules 31, a service disconnect 33, a current sensor 34, and a contactor 35. The plurality of cell modules 31, the service disconnect 33, the current sensor 34, and the contactor 35 are connected in series.

  Here, the cell module 31 constitutes an assembled battery by connecting a plurality of cells which are batteries in series and parallel. And the assembled battery group is comprised by the several cell module 31 connected in series.

Further, the battery unit 23-1 includes a BMU 36, and the communication line of each CMU 32 and the output line of the current sensor 34 are connected to the BMU (management device) 36.
The BMU 36 controls the entire battery unit 23-1 under the control of the gateway device 24, and performs opening / closing control of the contactor 35 based on the communication result with each CMU 32 and the detection result of the current sensor 34. Each CMU 32 transmits to the BMU 36 a cell (battery) voltage or a cell module 31 voltage and a temperature of the cell module 31 (a temperature representative of the cell module 31) at a predetermined cycle.

Next, the configuration of the battery terminal board will be described.
The battery terminal board 22 includes a plurality of panel breakers 41-1 to 41-N provided corresponding to the battery boards 21-1 to 21-N and a master configured as a microcomputer that controls the entire storage battery device 11. (MASTER) device 42.

  The master device 42 is configured as a control power line 51 supplied via the UPS (Uninterruptible Power System) 12A of the power conversion device 12 and the Ethernet (registered trademark) between the power conversion device 12 and the control data. Are connected to a control communication line 52 that exchanges data.

FIG. 2 is an explanatory diagram of a main part of the embodiment.
In FIG. 2, the same parts as those in FIG. In FIG. 2, for ease of explanation, it is assumed that the cell module 31 includes three cell modules 31-1 to 31-3, and the cell module 31 is a CMU 32 that functions as an assembled battery monitoring device. It is assumed that CMU 32-1 to 32-3 corresponding to each of -1 to 31-3 are provided.

Each of the CMUs 32-1 to 32-3 includes a start notification input terminal T1 to which a start notification signal is input and a start notification output terminal T2 to output the start notification signal.
The activation notification input terminal T1 of the CMU 32-1 receives the activation notification signal WU1 from the BMU 36 functioning as an assembled battery management device, and the numbering of CAN_ID as an identification code (or valid CAN_ID setting confirmation) is completed. At this point, the activation notification signal WU2 is output via the activation notification output terminal T2.

As a result, the activation notification input terminal T1 of the CMU 32-2 receives the activation notification signal WU2 from the CMU 32-1, and when the CAN_ID numbering (or valid CAN_ID setting confirmation) is completed, the activation notification output terminal T2 The activation notification signal WU3 is output via.
Similarly, the activation notification input terminal T1 of the CMU 32-3 receives the activation notification signal WU3 from the CMU 32-2 and completes the CAN_ID numbering (or valid CAN_ID setting confirmation) when the activation notification signal WU3 is completed. The activation notification signal WU4 is output via.

FIG. 3 is an explanatory diagram of a schematic configuration of the CMU.
Since the CMUs 32-1 to 32-3 have the same configuration, the CMU 32-1 will be described as an example in FIG.
The CMU 32-1 has a battery pack monitoring circuit 61 that acquires the voltage and temperature of a cell (battery) (or a representative temperature of the entire battery pack), timing control of various data acquisition, communication via the communication bus 37, and power supply The microprocessor 62 that performs control, CAN_ID (identification code) acquisition, and the like, the EEPROM 63 that is an electrically erasable / writable read-only storage device, and the power supplied from the power supply line PW are stabilized, and the CMU 32-1 And a power supply circuit 64 for supplying electric power for moving each part.

Next, the operation of the embodiment will be described.
FIG. 4 is a process flowchart of the automatic numbering process of the CAN_ID of the BMU according to the embodiment.
FIG. 5 is a processing timing chart of the embodiment.
First, at time t0, the BMU 36 supplies power to the CMUs 32-1 to 32-3 via the power supply line PW to start up.
Subsequently, at time t1, the BMU 36 outputs the activation notification signal WU1 as an activation state (“L” level) to the activation notification input terminal T1 of the CMU 32-1 (step S11).
Then, the BMU 36 waits for a response from the CMUs 32-1 to 32-2 for a predetermined time (step S12).
As a result, as shown in the lower part of FIG. 5, the CMU 32-1 shifts to the numbering process.

FIG. 6 is a process flowchart of the CMU CAN_ID automatic numbering process according to the embodiment.
When the microprocessor 62 of the CMU 32-1 is activated by being supplied with power, it determines whether or not the activation notification input (activation notification signal WU1 in the case of the CMU 32-1) is at the “L” level, which is the activation state. A determination is made (step S21).
In the determination in step S21, when the activation notification signal WU1 is still at the “H” level (non-activated state) (step S21; No), the CMU 32-1 enters the standby state.
In step S21, the microprocessor 62 of the CMU 32-1 determines whether or not numbering has already been performed when the activation notification signal WU1 is at the “L” level (step S21; Yes). Then, the CAN_ID numbering data is read from the EEPROM 63 (step S22).

Subsequently, the microprocessor 62 of the CMU 32-1 determines whether or not a valid CAN_ID is assigned (step S23). That is, the microprocessor 62 cannot read the numbering data from the EEPROM 63, or if the numbering data that is not valid is read, the valid CAN_ID is not assigned (step S23; Yes). The CMU is in a standby state for one transmission cycle of normal regular communication (step S24).
Subsequently, the microprocessor 62 of the CMU 32-1 requests numbering data corresponding to CAN_ID from the BMU 36 via the communication bus 37 (step S25).

On the other hand, the BMU 36 that has received the numbered data request in step S25 confirms how many CMUs 32 from the received data can communicate with each other by normal regular communication (step S13). In this case, there are no CMUs 32 that are still performing regular periodic communication, so the number is zero.
Next, the BMU 36 determines whether or not a numbering request has been made from the CMU 32 (in this case, the CMU 32-1) (step S14).
If it is determined in step S14 that a numbering request has been made from the CMU 32 (step S14; No), the BMU 36 determines whether it is within a predetermined time since the previous numbering request was received (step S17). ).

If it is determined in step S17 that the BMU 36 is within a predetermined time since the previous numbering request was received (step S17; Yes), the error ends.
This is because each CMU 32 is configured to re-request the numbered data (identification code) from the BMU 36 after a predetermined time allowing for a delay that cannot occur in normal processing. is there. As a result, when a request for numbered data (identification code) comes in succession within a predetermined time that allows for a delay that cannot occur in normal processing on the BMU 36 side, a malfunction due to noise mixing in the start notification input, etc. It is possible to detect anomalies when this occurs.

In step S17, if it is determined that the BMU 36 is not within the predetermined time since the previous numbering request was received (step S17; No), the BMU 36 confirms the activation because it is a request for regular numbering data. A number obtained by adding 1 to the number of the CMU being transmitted is transmitted to the CMU 32 (step S18), and the process proceeds to step S12 again.
Specifically, since there is no CMU 32 that performs regular regular communication yet, the number of the CMU that is sure to start is 0, so the number to be notified is 0 + 1 = 1.

  On the other hand, the microprocessor 62 of the CMU 32-1 is in a standby state until a response is returned from the BMU 36 or for a predetermined time (step S26).

Subsequently, the microprocessor 62 of the CMU 32-1 determines whether or not valid numbering data has been acquired from the BMU 36 (step S27).
If it is determined in step S27 that valid numbering data cannot be acquired (step S27; No), it is determined whether the data acquisition process has been repeated a predetermined number of times (step S32), and the data acquisition process is performed a predetermined number of times. If it is less (step S32; No), the process again proceeds to step S25, and the acquisition of the numbered data is attempted again. If the data acquisition process is repeated a predetermined number of times (step S32; Yes), an error notification is given and the process ends.

  If valid numbering data can be acquired in the determination in step S27 (step S27; Yes), the acquired numbering data, that is, valid CAN_ID is written in the EEPROM 63 (step S28). Here, the reason why the valid CAN_ID is written in the EEPROM 63 is to eliminate the need to perform the acquisition process from the next time, and as a result, the startup time of the storage battery device 11 can be shortened.

Next, the microprocessor 62 of the CMU 32-1 waits for one transmission cycle of normal regular communication (step S29).
Next, the microprocessor 62 of the CMU 32-1 starts normal regular communication at time t2, and notifies the BMU 36 of activation via the communication bus 37 (step S30). At the same time, the microprocessor 62 of the CMU 32-1 outputs the activation notification signal WU2 corresponding to the “L” level, that is, the activation state, to the next-stage CMU 32-2 via the activation notification output terminal T2 (step S31). The numbering process ends.
As a result, the CMU 32-2 starts the numbering process.

  On the other hand, if the numbering request from the CMU 32 is not made in the determination in step S14 (step S14; Yes), the BMU 36 is “L” in which the activation notification signal WU4 input from the CMU 32-3 is in the activated state. It is determined whether or not the level is reached (step S15).

If it is determined in step S15 that the activation notification signal WU4 input from the CMU 32-3 is at the “H” level and the CMU 32-3 is not yet activated (assignment of CAN_ID has not been completed) (step S15). S15; No), the process proceeds to step S12 again, and the same process is performed.
Following the same procedure, if the CMU 32-2 starts the numbering process at time t2, completes the numbering process at time t3, and sets the activation notification signal WU3 to the “L” level in the activated state, the CMU 32-3 Will also start the numbering process.

As a result, when the CMU 32-3 completes the numbering process at time t4 and sets the activation notification signal WU4 to the “L” level, which is the activated state, the BMU 36 receives the input from the CMU 32-3 in the determination of step S15. It is detected that the activated notification signal WU4 has become the “L” level (step S15; Yes), the number of connected CMUs 32, and thus the number of connected cell modules 31, are determined, and the process ends. (Step S16).
By the way, the BMU 36 may take a long time to confirm the communication in the normal process due to the delay of the communication completion or the like for the CMU 32 that has just shifted to the normal process.

  In order to avoid this, when requesting numbering data (identification code: CAN_ID) to the BMU 36, a predetermined time is waited, and a period of time for completing the recognition process of the CMU 32 that has just shifted to the normal process is completed in the BMU 36. Yes.

  As described above, according to the present embodiment, immediately after the storage battery device 11 is assembled, the CMU 32 (in this embodiment, the CMUs 32-1 to 32-3) is not identified, but once the power source is activated. Then, identification codes can be given automatically in the order of connection.

  In the above configuration, in consideration of maintenance and manufacturing convenience, the CMU 32 is instructed via the communication bus 37 to initialize the identification code so that a valid identification code is not recorded. It is preferable.

  Further, it is preferable that the BMU 36 detects an abnormality when a predetermined activation notification signal (in this embodiment, an “L” level activation notification signal WU4) is not input within a predetermined time. . In this case, as an operation at the time of detecting an abnormality, it is conceivable to control the power supply line PW to cut off the power supply to the CMU 32 and to restart it. Further, if numbering cannot be performed for all CMUs 32 even after a predetermined number of restarts, the battery unit to which the CMUs 32 that could not be numbered belong is not used.

  Further, when requesting numbering data (identification code) to the BMU 36, if a configuration including a unique number recorded at the time of manufacture is transmitted to a predetermined storage location of the EEPROM 63 in the CMU 32, the start notification input is received. It is easy to detect an abnormality when numbered data (identification code) is requested from a plurality of CMUs 32 due to malfunction due to noise mixing. In this case, the identification code (CAN_ID) is not numbered in the order of daisy chain connection in order to return the numbered data (identification code) by distinguishing each CMU 32 based on the unique number. Therefore, it is not preferable.

  In the above description, the last CMU 32 (CMU 32-3 in the above embodiment) connected in a daisy chain is configured to receive a start notification signal (start notification signal WU4 in the above embodiment) from the last MMU 32. However, the signal line through which the activation notification signal is input to the BMU 36 is not provided from the last CMU 32 connected in a daisy chain, and the number of CMUs 32 under its management is stored in advance in the BMU 36, and the activation notification signal is transmitted to the CMU 32. It is also possible to configure so that an abnormality is determined when a notification indicating that startup has been completed normally from each CMU 32 is not obtained via the communication bus 37 within a predetermined period of time.

FIG. 7 is an explanatory diagram of a modification.
In the above description, the case where all the cell modules are serially connected has been described. However, a plurality of cell module groups in which a plurality of cell modules are connected in series may be connected in parallel.
More specifically, as shown in FIG. 7, a first cell module group in which a plurality of cell modules 31-11 to 31-13 are connected in series and a plurality of cell modules 31-21 to 31-23 are connected in series. The second cell module group is connected to the BMU 36 in parallel.
The BMU 36 is separately assigned (CAN_ID) to the CMUs 32-11 to 32-13 corresponding to the first cell module group and the CMUs 32-21 to 32-23 corresponding to the second cell module group. What is necessary is just to comprise.

  The storage battery device of this embodiment includes a control device such as a CPU and a storage device such as a ROM (Read Only Memory) and a RAM, and has a hardware configuration using a normal computer.

  The control program executed by the storage battery device of the present embodiment is a file in an installable or executable format, such as a CD-ROM, flexible disk (FD), CD-R, DVD (Digital Versatile Disk) or the like. It is recorded on a readable recording medium and provided.

Moreover, you may comprise so that the control program performed with the storage battery apparatus of this embodiment may be provided by storing on a computer connected to networks, such as the internet, and downloading via a network. Moreover, you may comprise so that the control program run with the storage battery apparatus of this embodiment may be provided or distributed via networks, such as the internet.
Moreover, you may comprise so that the control program of the storage battery apparatus of this embodiment may be provided by previously incorporating in ROM etc.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 Storage battery system 11 Storage battery apparatus 12 Power converter 21 Battery panel 22 Battery terminal board 23 Battery unit 24 Gateway apparatus 25 DC power supply apparatus 31 Cell module (battery group)
32 CMU (Monitoring device)
33 Service Disconnect 34 Current Sensor 35 Contactor 36 BMU (Management Device)
37 communication bus 41 board breaker 42 master device 51 control power line 52 control communication line 61 assembled battery monitoring circuit 62 microprocessor (monitoring device)
63 EEPROM (memory means)
64 power supply circuit 32-1 to 32-3 CMU (monitoring device)
32-11 to 13-13 CMU (monitoring device)
32-21 to 32-23 CMU (monitoring device)
PW power supply line T1 start notification input terminal T2 start notification output terminal WU1 to WU4 start notification signal LH high potential power supply line (high potential power supply line)
LL Low potential power supply line (Low potential power supply line)
LHO, LLO Output power line (Output power line: Bus)

Claims (6)

A plurality of assembled battery groups;
A plurality of monitoring devices that correspond to each of the assembled battery groups, perform monitoring of the corresponding assembled battery groups, and are connected in series with signal lines;
A management device for controlling and managing the plurality of monitoring devices,
When the monitoring device is instructed to start by the management device, the monitoring device acquires an identification code acquisition means for acquiring an identification code for identifying the monitoring devices from the management device;
When the acquisition of the identification code is completed, a signal output means for outputting a signal for prompting the operation start of the identification code acquisition means in the monitoring device of the next stage via the signal line;
A storage battery device comprising: The signal line is provided separately from a communication line for normal communication.
The storage battery device according to claim 1. The monitoring device includes storage means for storing the identification code once acquired,
The identification code acquisition means performs processing assuming that acquisition is completed when the valid identification code is stored in the storage means.
The storage battery device according to claim 1 or 2. When the identification code acquisition process by the identification code acquisition unit has not been completed more than a predetermined number of times or when the identification code acquisition process by the identification code acquisition unit has not been completed within a predetermined time Is determined to be abnormal and restarts the plurality of monitoring devices.
The storage battery device according to any one of claims 1 to 3. A plurality of assembled battery groups, corresponding to each of the assembled battery groups, monitoring the corresponding assembled battery group, a plurality of monitoring devices connected in series with a signal line, and control and management of the plurality of monitoring devices A control method executed by a storage battery device comprising:
Instructing activation of the plurality of monitoring devices;
When the activation is instructed, a process of acquiring an identification code for identifying the monitoring devices from the management device;
When the acquisition of the identification code is completed, a process of outputting a signal prompting the start of the identification code acquisition operation in the monitoring device of the next stage through the signal line;
The control method of the storage battery apparatus provided with. A plurality of assembled battery groups, corresponding to each of the assembled battery groups, monitoring the corresponding assembled battery group, a plurality of monitoring devices connected in series with a signal line, and control and management of the plurality of monitoring devices A control program for controlling a storage battery device with a computer by a computer,
The computer,
Means for instructing activation of the plurality of monitoring devices;
When the activation is instructed, means for acquiring an identification code for identifying the monitoring devices from the management device;
Means for outputting a signal prompting the start of an identification code acquisition operation in the next-stage monitoring device via the signal line when acquisition of the identification code is completed;
Control program to function.

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