JP2015146707A - Power storage module controller and power storage module control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage module controller and an a power storage module control method capable of stopping charge and discharge of a power storage cell instantaneously even in the case of emergency stop, by controlling start/stop of each low-level control circuit directly by a higher-level control circuit, and in which no current flow through the low-level control circuit while a power storage device is not charging not discharging, and thereby the power of the power storage cell is never consumed.SOLUTION: In a power storage module controller including a power storage module having a plurality of power storage cells and a low-level control circuit for controlling charge and discharge of the power storage cells, and a higher-level control circuit performing arithmetic processing and controlling the low-level control circuit, the low-level control circuit and higher-level control circuit are connected by a communication line for transmitting and receiving an electric signal, the low-level control circuit is supplied with power from the power storage cells via a power supply line, and configured so that Yes and No of electrification of the power supply line can be controlled by the higher-level control circuit.

Description

  The present invention relates to a power storage module control device and a power storage module control method for controlling a power storage module including a plurality of battery cells such as capacitor cells such as lithium ion capacitors and electric double layer capacitors and lithium ion batteries, for example.

  Conventionally, as a high-voltage, large-capacity power storage device, a plurality of power storage cells such as a capacitor cell composed of an electric double layer capacitor and a lithium ion capacitor and a battery cell composed of a lithium ion battery are connected. A power storage module is known.

A power storage device configured by connecting a plurality of such power storage modules for the purpose of further increasing the voltage and capacity is also known.
As disclosed in Patent Document 1, such a power storage device is provided with a lower control circuit and a higher control circuit for controlling charging / discharging of a plurality of power storage modules.

FIG. 3 is a schematic circuit diagram for explaining a configuration of a conventional power storage device.
As shown in FIG. 3, the power storage module power storage device 100, a plurality of storage cells X _n (n is a natural number of 1 to m) and a lower control circuit Y _n for controlling the charging and discharging of the power storage cells X _n Z _n and an upper control circuit 104 for controlling the lower control circuits Y _{1 to} Y _m are provided.

Storage module Z _n is a power terminal 110 for charging and discharging of the storage cells X _n, the low order control circuit Y _n is provided with a communication terminal 112 for transmitting and receiving electrical signals, each storage module Z _n The power terminals 110 are connected in series to form a high-voltage, large-capacity power storage device 100.

The upper control circuit 104 and the communication terminals 112 of the lower control circuits Y _{1 to} Y _m are daisy chain connected by the serial communication line 106.
In the power storage device 100 configured as described above, a control signal such as activation and stop is transmitted from the upper control circuit 104 to the lower control circuit Y ₁ via the serial communication line 106.

The low order control circuit Y _1, based on the received control signal, the charging and discharging control of the storage cells X ₁ to the low order control circuit Y ₁ is responsible for control, the low order control circuit a control signal through the serial communication line 106 to send to the Y _2.

As described above, the control signals are sequentially transmitted to the lower control circuits Y _{1 to} Y _m via the serial communication line 106, and finally, the control signal is transmitted from the lower control circuit Y _n to the upper control circuit 104. Will be.

The upper control circuit 104 determines whether or not a correct control signal has been transmitted to all of the lower control circuits Y _{1 to} Y _m by comparing the transmitted control signal with the returned control signal. The reliability of the apparatus 100 is improved. As a determination in the upper control circuit 104, for example, when the transmitted control signal is different from the returned control signal, an erroneous control is performed in any of the lower control circuits Y _{1 to} Y _m . Can be determined.

The upper control circuit 104 transmits a control signal to which an error correction code is added, and the lower control circuits Y _{1 to} Y _m receive the control signal sent from the higher control circuit 104 and send it from the upper control circuit 104. It is also possible to detect erroneous control by confirming whether there is no difference from the error correction code that has been provided.

Note that each lower control circuits Y ₁ to Y _m are each power supply line 108a from the storage cell X ₁ to X _m of the power for operation is supplied via 108b.

Further, as shown in FIG. 4, the upper control circuit 104 and each lower control circuit Y _{1 to} Y _m are connected in parallel by the communication line 107, and each lower control circuit Y is connected from the upper control circuit 104 via the communication line 107. A configuration for transmitting a control signal such as activation or deactivation to _n is also known.

Japanese Patent No. 5178881

However, in such a power storage device 100, since the upper control circuit 104 and the lower control circuits Y _{1 to} Y _m are daisy chain connected by the serial communication line 106, a control signal is transmitted from the upper control circuit 104. Therefore, it takes 10 milliseconds to several tens of milliseconds to complete the control in all the lower control circuits Y _{1 to} Y _m .

Since the delay time occurs in this way, the host control circuit 104 cannot perform real-time control, and charge / discharge does not stop quickly even in an emergency stop, and the storage cells X _{1 to} X _m are overcharged. There is a risk of overdischarge.

Even when the power storage device 100 is not charged / discharged, the lower control circuits Y _{1 to} Y _m are in a standby state to operate when a control command is transmitted from the upper control circuit 104. . Even in the standby state, a current of several μA to several tens of μA flows through the lower control circuits Y _{1 to} Y _n , so that the power of the storage cells X _{1 to} X _m is gradually consumed. End up.

Further, since the lower control circuits Y _{1 to} Y _m are in a standby state by a control signal from the upper control circuit 104, the storage cell X is also used for the operation for the lower control circuits Y _{1 to} Y _m to transition to the standby state. It had consumed a power of _{1 ~X m.}

Further, when an abnormality occurs in the lower control circuit Y _n of any one of the power storage modules Z _n , for example, the on / off operation at the time of discharging the power storage cell X _n is not normally performed, and current continues to flow to the lower control circuit Y _n. The power of the storage cell _Xn continues to be consumed.

Therefore, decreases the cell voltage of only storage cell power is consumed, spread the voltage difference between the power storage module Z _n, leading to unusable as the power storage device 100, in the worst case, the power storage cell could be destroyed .

  In view of the current situation, the present invention can directly stop the charging / discharging of the storage cell even during an emergency stop by directly controlling the start / stop of each lower control circuit by the upper control circuit. It is another object of the present invention to provide a power storage module control device and a power storage module control method in which no current flows through the lower control circuit and the power of the power storage cell is not consumed when the power storage device is not charged / discharged.

  Furthermore, the present invention prevents the power of the power storage cell from being consumed and prevents the power storage cell from being destroyed when an abnormality occurs in the lower control circuit of any power storage module in the power storage device. An object of the present invention is to provide a storage module control device and a storage module control method that can be performed.

The present invention was invented in order to solve the problems in the prior art as described above, and the power storage module control device of the present invention includes:
A power storage module comprising a power storage module having a plurality of power storage cells and a lower control circuit for controlling charging / discharging of the power storage cells, and a higher control circuit for performing arithmetic processing and controlling the lower control circuit A module controller,
The lower control circuit and the upper control circuit are connected by a communication line for transmitting and receiving electrical signals,
The lower control circuit is supplied with power from the storage cell via a power supply line,
The host control circuit is configured to be able to control whether the power supply line is energized.

  With this configuration, the upper control circuit can directly control whether or not the electrode supply line that supplies power from the storage cell to the lower control circuit can be energized. By doing so, the lower control circuit can be stopped instantaneously, and charging / discharging of the storage cell can be stopped instantaneously.

  In addition, when an abnormality occurs in the lower-level control circuit of any power storage module, whether or not the power supply line that supplies power from the storage cell to the lower-level control circuit can be energized is controlled by a higher-level control different from the lower-level control circuit. Since it can be controlled directly by the circuit, the power supply to the lower control circuit can be stopped reliably.

  For this reason, only the power of the power storage cell of the power storage module having the lower-order control circuit in which the abnormality has occurred is not consumed, the voltage balance between the power storage modules is prevented from being disrupted, and the power storage cell is destroyed. Can be prevented.

  Further, in a state where the power storage device is not charged / discharged, by preventing the power supply line from being energized, no current flows from the power storage cell to the lower control circuit, and the power of the power storage cell is not consumed.

  In such a power storage module control device, a switch is provided on the power supply line, the upper control circuit and the switch are connected by a power control line, and the switch is turned on and off by the upper control circuit. It is preferable that the power supply line is configured to control whether or not energization is possible.

  In this way, by providing a switch on the power supply line, it is possible to reliably switch the power supply line between energization and switching by simply switching the switch on and off with the upper control circuit. The power supply to the can be reliably stopped.

Moreover, it is preferable that an insulating circuit is provided between the upper control circuit and the switch.
Thus, by providing the insulating circuit between the upper control circuit and the switch, it is possible to prevent malfunction due to noise on the control signal transmitted from the upper control circuit.

The power storage device preferably includes a plurality of the power storage modules.
In this case, the power supply terminals of the plurality of power storage modules may be connected in series, or the power supply terminals of the plurality of power storage modules may be connected in parallel.

  In this manner, by connecting a plurality of power storage modules, the power storage device can be increased in voltage and capacity.

The lower control circuits of the plurality of power storage modules and the upper control circuit can be daisy chain connected.
Further, an arithmetic processing means can be provided for each lower control circuit.

The power storage module control method of the present invention includes:
A power storage module having a plurality of power storage cells and a lower-order control circuit for controlling charge and discharge of the power storage cells;
A power storage module control method for a power storage device comprising: a power supply line that supplies power from the power storage cell to the lower control circuit,
The start / stop state of the lower control circuit is controlled by controlling whether the power supply line can be energized.

By configuring in this way, it is possible to stop the lower control circuit instantaneously by disabling energization of the power supply line even during an emergency stop, and it is possible to stop charging / discharging of the storage cell instantaneously.
Further, in a state where the power storage device is not charged / discharged, by preventing energization of the power supply line, current does not flow from the power storage cell to the lower control circuit, and power of the power storage cell is not consumed.

In such a storage module control method,
The power storage device is
An upper control circuit for performing arithmetic processing and controlling the lower control circuit;
A communication line for transmitting and receiving electrical signals between the lower control circuit and the upper control circuit, and
It is preferable to control whether the power supply line is energized by the upper control circuit.

  With this configuration, when the emergency control is determined to be necessary in the host control circuit, the host control circuit can instantaneously disable the power supply line, so the lower control circuit can be instantly installed. The charging and discharging of the storage cell can be stopped instantaneously.

In this case, a switch is provided on the power supply line, the upper control circuit and the switch are connected by a power control line,
It is preferable that the switch is turned on and off by the host control circuit.
Moreover, it is preferable that an insulating circuit is provided between the upper control circuit and the switch.

In such a power storage module control method, the power storage device may include a plurality of the power storage modules.
In this case, the power supply terminals of the plurality of power storage modules may be connected in series, or the power supply terminals of the plurality of power storage modules may be connected in parallel.

  According to the present invention, the start / stop state of the lower control circuit can be directly controlled by controlling the switch provided on the power supply line that supplies power from the storage cell to the lower control circuit. Even in an emergency stop, the lower control circuit can be instantaneously stopped and charging / discharging of the storage cell can be stopped instantaneously.

  In addition, even when an abnormality occurs in the lower control circuit of the power storage module, the power supply of the lower control circuit can be directly controlled by the upper control circuit, and even when an abnormality occurs in the lower control circuit, the power can be stored safely. The apparatus and the power storage system can be stopped.

  For this reason, the electric power of an electrical storage cell does not continue being consumed, and it can prevent that the voltage difference between electrical storage modules spreads, or an electrical storage cell is destroyed.

  Furthermore, when the power storage device is not charged / discharged, the power supply line cannot be energized, so that no current flows from the power storage cell to the lower control circuit, and the power storage device is not used for a long time. Moreover, it can prevent that the electric power of an electrical storage cell is consumed.

FIG. 1 is a schematic configuration diagram of a power storage device for explaining an embodiment of the power storage module control device of the present invention. FIG. 2 is a schematic configuration diagram of a power storage device for explaining another embodiment of the power storage module control device of the present invention. FIG. 3 is a schematic circuit diagram for explaining a configuration of a conventional power storage device. FIG. 4 is a schematic circuit diagram for explaining another configuration of the conventional power storage device.

  Hereinafter, embodiments (examples) of the present invention will be described in more detail based on the drawings. In addition, although embodiment of a present Example is described below, this invention is not limited to this embodiment. Moreover, in embodiment used for this invention, it can use suitably for the electrical storage module, electrical storage apparatus, and electrical storage system using electrical storage cells, such as a lithium ion capacitor, an electric double layer capacitor, and a lithium ion battery.

FIG. 1 is a schematic configuration diagram of a power storage device for explaining an embodiment of the power storage module control device of the present invention.
As shown in FIG. 1, power storage device 10 of the present embodiment, a plurality of storage cells C _n (n is a natural number of 1 to m) and the low order control circuit D _n for controlling the charging and discharging of the power storage cells C _n A plurality of power storage modules _Mn connected in series, and a high-order control circuit 14 for controlling the low-order control circuits D _{1 to} D _m , and output terminals 16 and 17 for outputting power from the power storage device 10. Yes.

Storage modules M _n is a power terminal 28 for charging and discharging of the power storage cell C _n, the low order control circuit D _n is provided with a communication terminal 32 for transmitting and receiving electrical signals, each storage module M _n The power terminals 28 are connected in series, and configured as a high-voltage, large-capacity power storage device 10.

As shown in FIG. 1, the upper control circuit 14 and the communication terminals 32 of the lower control circuits D _{1 to} D _m are daisy chain connected by the communication line 30, and the power storage device 10 configured in this way. in the control command transmitted from the host control circuit 14 will sequentially transferred from the lower control circuit D ₁ and to a lower control circuit D _m.

The lower control circuits D _{1 to} D _m perform charge / discharge control of the storage cell C _n each responsible for control based on the control command transmitted from the upper control circuit 14, and the voltage value of the storage cell C _n responsible for each. Is measured and transmitted to the upper control circuit 14.

The voltage value of the electric rechargeable cells C _n measured at the low-level control circuit D ₁ to D _m will be sent to the host control circuit 14 are sequentially transferred to the low order control circuit D ₁ to D _m.
The lower control circuits D _{1 to} D _m are supplied with power for operation from the storage cells C _{1 to} C _m via the power supply lines 20a and 20b, respectively.

Each of the power supply lines 20a connected to the lower control circuits D _{1 to} D _m is provided with a switch 22 for switching on / off of energization based on a control signal from the upper control circuit 14.
Each switch 22 and the upper control circuit 14 are connected to a power control line 26 via an insulation circuit 24.

  In this specification, the term “insulation circuit” is not particularly limited as long as it can transmit signals in an electrically insulated state. For example, a photocoupler, an isolator, a photomoss relay, or the like is used. Circuit.

The host control circuit 14 includes an input / output means 15 for communicating with a host control device such as a control device that controls a power storage system configured by connecting a plurality of power storage devices 10. Based on the voltage value of the power storage cell C _n measured by the lower control circuit D _n , the voltage value of the power storage device 10 can be calculated and output.

In the present embodiment, a plurality of power storage modules M _n and the upper control circuit 14 are housed in one package. By connecting the output terminals 16 and 17 of this package in series, higher voltage and larger A power storage device having a capacity may be used.

  In the power storage device 10 configured as described above, the power storage module control device 11 of this embodiment is configured by the upper control circuit 14, the insulation circuit 24, and the switch 22 provided in the power supply line 20a.

In the storage module control device 11, when a stop control signal is transmitted from the upper control circuit 14, the switches 22 are turned off via the insulating circuit 24, and the lower control circuits D are connected to the storage cells C _{1 to} C _m. It stops the power supply to ₁ to D _m.

On the other hand, when the control signal starts from the upper level control circuit 14 is transmitted, via an insulation circuit 24, the switches 22 and ON state, the low order control from the battery cell C ₁ -C _m circuit D ₁ to D _m The power supply to is started.

Thus, by switching directly to on-off of each switch 22 by the upper control circuit 14, it is possible to directly control the power supply to the lower control circuit D _n by the upper control circuit 14, the low order control circuit The starting / stopping state of D _n can be controlled.

Therefore, when transmitting control signal of an emergency stop from the host control circuit 14 also, by simply switching the switches 22 to OFF state, and stops the power supply to the lower control circuit D _n, charge and discharge operations even instantaneously Will stop.

Further, when the power storage device 10 is not charged / discharged, that is, when the lower control circuit D _n is in a stopped state, each switch 22 is turned off, and the storage cell C _{n is transferred} to the lower control circuit D _n . since current is prevented flowing, it can prevent the power of the power storage cell C _n is consumed.

  Further, by providing an insulating circuit 24 between the upper control circuit 14 and each switch 22 as in the present embodiment, malfunction caused by noise on the control signal transmitted from the upper control circuit 14 to each switch 22 is prevented. Can be prevented.

  In this embodiment, the insulating circuit 24 is provided between the upper control circuit 14 and each switch 22, but the insulating circuit 24 may be provided between the upper control circuit 14 and the input / output means 15. Further, the insulating circuit 24 may not be provided.

FIG. 2 is a schematic configuration diagram of a power storage device for explaining another embodiment of the power storage module control device of the present invention.
As shown in FIG. 2, the electric storage device 10 of the present embodiment, a plurality of storage cells C _n (n is a natural number of 1 to m) and the low order control circuit D _n for controlling the charging and discharging of the power storage cells C _n A plurality of power storage modules M _n are connected to each other, and a higher control circuit 14 that controls the lower control circuits D _n of the plurality of power storage modules M _n is provided.

Storage modules M _n is a power terminal 28 for charging and discharging of the power storage cell C _n, the low order control circuit D _n is provided with a communication terminal 32 for transmitting and receiving electrical signals, each storage module M _n The power terminals 28 are connected in series, and configured as a high-voltage, large-capacity power storage device 10.

Further, the upper control circuit 14 and each lower control circuit D _n are connected in parallel by a communication line 30, and, for example, power storage is performed from the upper control circuit 14 to each lower control circuit D _n via the communication line 30. A control signal related to charging / discharging of the cell C _n is transmitted.

Each lower control circuit D _n performs charge / discharge control of the plurality of power storage cells C _{n included} in the power storage module M _n based on the control signal received from the upper control circuit 14, or measures the voltage value of the power storage cells. Or transmitted to the host control circuit 14.

Each of the low-order control circuits D _n includes calculation processing means, and when the calculation processing means determines that the voltage balance between the storage cells X _n measured by the low-order control circuit D _n is broken, processing means by, for example, a current flows to the lower control circuit Dn only high energy storage cell voltage value, to consume the electric power of the voltage value higher storage cell, the equalization control for correcting the voltage balance of C _n between storage cells It can be performed.

The lower control circuits D _{1 to} D _m are supplied with power for operation from the storage cells C _{1 to} C _m via the power supply lines 20a and 20b, respectively.
Each of the slave control circuit D ₁ to D _m to the connected power supply line 20a, on the basis of a control signal transmitted from the host control circuit 14 via a power control line 26, Yes No of energization of the power supply line 20a A switch 22 for switching between the two is provided.

In the present embodiment, one power storage module M _n is housed in one package, and a plurality of packages are centrally managed by a master controller provided with the upper control circuit 14.

  In the power storage device 10 configured as described above, the power storage module control device 11 of the power storage device 10 of the present embodiment is configured by the upper control circuit 14 and the switch 22 provided in the power supply line 20a.

In power storage module control device 11, when the control signal is stopped from the host control circuit 14 is sent to each switch 22 a switching state, the power supply from the storage cell C _n to the lower control circuit D _n of the storage modules M _n To stop.

On the other hand, when the control signal starts from the upper level control circuit 14 is sent, each switch 22 and ON state, to start power supply to the lower control circuit D _n of the storage modules M _n from storage cell C _n.

Thus, by switching directly to on-off of each switch 22 by the upper control circuit 14, it is possible to directly control the power supply to the lower control circuit D _n by the upper control circuit 14, the low order control circuit The starting / stopping state of D _n can be controlled.

For this reason, even when an abnormality occurs in any of the lower control circuits D _n of the power storage module M _n , the power supply of the lower control circuit D _n can be directly controlled by the upper control circuit 14. When the abnormality of the lower control circuit D _n is detected, the power storage device 10 can be safely stopped by stopping the power supply of each lower control circuit D _n by the upper control circuit 14.

The preferred embodiment of the present invention has been described above, but the present invention is not limited to this. For example, equalization for correcting the voltage balance between the respective power storage modules M _n by the upper control circuit 14 Various modifications can be made without departing from the object of the present invention, such as a configuration in which control is performed.

10 power storage device 11 energy storage module control device 14 the upper control circuit 15 input-output means 16 output terminal 17 an output terminal 20a power supply line 20b power supply line 22 switch 24 insulation circuit 26 power control line 28 power terminals 30 communication line 32 the communication terminal C _n storage cell D _n low order control circuit M _n storage module 100 power storage device 104 host control circuit 106 serial communication line 107 the communication line 108a power supply line 108b power supply line 110 power terminal 112 communication terminal X _n storage cells Y _n low order control circuit Z _n Power storage module

Claims (14)

A power storage module comprising a power storage module having a plurality of power storage cells and a lower control circuit for controlling charging / discharging of the power storage cells, and a higher control circuit for performing arithmetic processing and controlling the lower control circuit A module controller,
The lower control circuit and the upper control circuit are connected by a communication line for transmitting and receiving electrical signals,
The lower control circuit is supplied with power from the storage cell via a power supply line,
The power storage module control device configured to be capable of controlling whether the power supply line is energized by the host control circuit.   The power supply line is provided with a switch, the upper control circuit and the switch are connected by a power control line, and the power supply line can be energized by switching on and off of the switch by the upper control circuit. The storage module control device according to claim 1, wherein the storage module control device is configured to control disabling.   The power storage module control device according to claim 1, wherein an insulation circuit is provided between the upper control circuit and the switch.   The power storage module control device according to claim 1, wherein the power storage device includes a plurality of the power storage modules.   The power storage module control device according to claim 4, wherein power supply terminals of the plurality of power storage modules are connected in series.   6. The power storage module control device according to claim 5, wherein a lower control circuit of the plurality of power storage modules and the upper control circuit are daisy chain connected.   The power storage module control device according to claim 4, wherein power supply terminals of the plurality of power storage modules are connected in parallel.   The power storage module control device according to claim 4, further comprising an arithmetic processing unit for each of the lower control circuits. A power storage module having a plurality of power storage cells and a lower-order control circuit for controlling charge and discharge of the power storage cells;
A power storage module control method for a power storage device comprising: a power supply line that supplies power from the power storage cell to the lower control circuit,
An energy storage module control method, comprising: controlling a start / stop state of the lower-order control circuit by controlling availability of energization of the power supply line. The power storage device is
An upper control circuit for performing arithmetic processing and controlling the lower control circuit;
A communication line for transmitting and receiving electrical signals between the lower control circuit and the upper control circuit, and
The storage module control method according to claim 9, wherein the upper control circuit controls whether the power supply line is energized. A switch is provided on the power supply line, and the upper control circuit and the switch are connected by a power control line,
The storage module control method according to claim 10, wherein the switch is turned on and off by the upper control circuit.   The power storage module control method according to claim 9, wherein the power storage device includes a plurality of the power storage modules.   The power storage module control method according to claim 12, wherein power supply terminals of the plurality of power storage modules are connected in series.   The power storage module control method according to claim 12, wherein power supply terminals of the plurality of power storage modules are connected in parallel.

Images