JP6797729B2 - Solid electrolyte battery module - Google Patents

Description

The present invention relates to a solid electrolyte battery module.

Conventionally, an all-solid-state battery using a battery laminate in which a solid electrolyte layer and an electrode layer are laminated between current collectors is known. For all-solid-state batteries, various techniques for securing the contact area and contact pressure of contact portions between solid surfaces in a battery laminate have been proposed.
For example, in Patent Documents 1 and 2 below, the battery laminate is pressurized by a piston device, a pressurizing portion, or the like.

JP-A-2010-205479 JP-A-2015-09521

However, in an all-solid-state battery in which a pressurizing device such as a piston is arranged around a battery laminate, as in the conventional all-solid-state battery as in Patent Document 1, the arrangement space is likely to be wasted.
Further, in an all-solid-state battery using a shape memory alloy as in Patent Document 2, since the thermal expansion of the battery laminate increases and the contraction force of the shape memory alloy also increases in a high temperature state, an excessive pressure is applied in the stacking direction. It may be pressed, and the durability of the battery laminate tends to decrease accordingly.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a compact and highly durable solid electrolyte battery module.

According to the solid electrolyte battery module of the first aspect of the present invention, a battery laminate in which a solid electrolyte layer and an electrode layer are laminated between current collectors, and a constraint body that restrains the battery laminate and expands and contracts by energization. And a restraint circuit that is connected in parallel with the charge / discharge unit connected between the current collectors and energizes the restraint body with a part of the electric power between the current collectors when the charge / discharge unit is charged / discharged. I have.

According to the solid electrolyte battery module of the present invention, a restraint body that restrains the battery laminate and expands and contracts by energization is connected in parallel with the charging / discharging section between the current collectors so that the restraint body is energized during charging / discharging. It is configured. Therefore, during charging and discharging, the binding force of the restraint body can be increased to pressurize in the stacking direction, and a sufficient contact area and contact pressure between the layers can be secured.
On the other hand, since the binding force of the restraint is small except during charging / discharging, pressure and tension are not unnecessarily applied to the battery laminate and the restraint. Therefore, deterioration of the battery laminate and the restraint can be suppressed.

Moreover, since the binding force is changed by energizing the restraint body itself, it is not necessary to provide an operating device or the like that pressurizes the battery laminate in the stacking direction, and the volume other than the battery laminate can be suppressed to make it compact.
Therefore, it is possible to provide a solid electrolyte battery module that is compact and has excellent durability.

In the solid electrolyte battery module of the second aspect of the present invention, in the first aspect, the restraint is made of a strip material which has flexibility and is heated by energization and contracts, and surrounds the battery laminate. I'm restrained.
According to such a configuration, since the battery laminate is surrounded and constrained by the restraint body made of the flexible strip material, the battery laminate is not bulky and the arrangement space of the member for pressurizing in the stacking direction is significantly reduced. It can be eliminated and further compacted.

In the solid electrolyte battery module of the third aspect of the present invention, in the first or second aspect, the energization switch for opening and closing the restraint circuit and the restraint control unit for adjusting the energization amount of the restraint circuit by the energization switch. And have.
According to such a configuration, by controlling the energization switch that opens and closes the restraint circuit by the restraint control unit, the energization amount of the restraint body can be adjusted at the time of charging / discharging, so that the battery laminate is excessively pressurized or the contact area. It is easy to prevent the contact pressure from becoming insufficient. Therefore, it is easy to suppress the deterioration of the battery laminate and the restraint.

In the solid electrolyte battery module according to the fourth aspect of the present invention, in the third aspect, the restraint control unit is provided in the charge / discharge unit, and an open / close signal is transmitted to the energization switch when the charge / discharge unit is charged / discharged. It is configured to do.
According to such a configuration, since the energization switch of the restraint circuit is opened and closed based on the open / close signal from the restraint control unit of the charge / discharge unit, the restraint circuit can be appropriately opened / closed in conjunction with the operation of the charge / discharge unit. , The configuration of the control system can be simplified.

In the solid electrolyte battery module of the fifth aspect of the present invention, in the third aspect, the charge / discharge unit has a charge / discharge current sensor that detects a current, and the restraint circuit has a restraint current that detects a current. The restraint control unit has a sensor, and is configured to transmit an open / close signal for adjusting the open / close of the energization switch based on a current detection signal from each of the sensors.
According to such a configuration, since the current of the circuit of the charge / discharge part and the current of the restraint circuit are detected and the opening / closing of the energization switch is adjusted, the restraint circuit can be opened / closed more appropriately and the durability is improved. It is easier to improve.

In the solid electrolyte battery module of the fifth aspect of the present invention, in the third aspect, the restraint body has a binding force detecting unit for detecting the binding force of the battery laminate, and the binding force detecting unit is , The opening / closing signal for adjusting the opening / closing of the energizing switch is transmitted based on the binding force signal from the binding force detecting unit.
According to such a configuration, since the opening / closing of the energization switch is adjusted according to the binding force of the battery laminate, it is possible to prevent the battery laminate from being restrained by an excessive binding force, and the durability is surely improved. Can be done.

According to the above-mentioned solid electrolyte battery module, it is possible to provide a compact and highly durable solid electrolyte battery module.

It is a block diagram which shows the solid electrolyte battery module which concerns on 1st Embodiment of this invention. It is used in the solid electrolyte battery module according to the first embodiment of the present invention. It is a flowchart which shows the operation of the solid electrolyte battery module which concerns on 1st Embodiment of this invention. It is a block diagram which shows the solid electrolyte battery module which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the operation of the solid electrolyte battery module which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the solid electrolyte battery module which concerns on 3rd Embodiment of this invention. It is a flowchart which shows the operation of the solid electrolyte battery module which concerns on 3rd Embodiment of this invention. It is a block diagram which shows the solid electrolyte battery module which concerns on the modification of 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same or corresponding members are designated by the same reference numerals in all drawings, and common description will be omitted.

[First Embodiment]
As shown in FIGS. 1 and 2, the solid electrolyte battery module 10 of the first embodiment is openably and closably connected to the charge / discharge circuit 12 having the charge / discharge unit 11.
The solid electrolyte battery module 10 includes a battery laminate 13, a guide frame 14 that supports the battery laminate 13, energizing terminals 15 at both ends of the battery laminate 13, and a restraint body 16 that restrains the battery laminate 13 from the outside. And a restraint circuit 17 for operating the restraint body 16.

First, the charging / discharging unit 11 of the present embodiment may be various loads using the electric power from the solid electrolyte battery module 10, various power sources for charging the solid electrolyte battery module 10, and the like. When the solid electrolyte battery module 10 is mounted on a vehicle, the charging / discharging unit 11 is, for example, a motor, an vehicle-mounted electrical component, or the like. In the case of a drive motor, it becomes a discharge part during traveling and a charging part during regeneration.
The charge / discharge unit 11 is electrically connected to the solid electrolyte battery module 10 as a charge / discharge circuit that can be opened and closed.

The battery laminate 13 has a configuration in which a plurality of structural units in which the positive electrode layers 19a and the negative electrode layers 19b are arranged on both sides of the solid electrolyte layer 18 are laminated in the uniaxial direction, and the current collectors 20 are arranged on both ends. doing. A large number of structural units including the solid electrolyte layer 18 and both electrode layers 19a and 19b are connected in series between the current collectors 20 at both ends.
The current collectors 20 arranged on both ends of the battery stack 13 are connected to the charge / discharge circuit 12 having the charge / discharge section 11 via wiring.

The battery laminate 13 has a configuration in which a plurality of structural units in which the positive electrode layers 19a and the negative electrode layers 19b are arranged on both sides of the solid electrolyte layer 18 are laminated in the uniaxial direction, and the current collectors 20 are arranged on both ends. doing. A large number of structural units including the solid electrolyte layer 18 and both electrode layers 19a and 19b are connected in series between the current collectors 20 at both ends.
The current collectors 20 arranged on both ends of the battery stack 13 are connected to the charge / discharge circuit 12 having the charge / discharge section 11 via wiring.

In the battery laminate 13, each component is formed in the shape of a solid plate, and the front surface and the back surface of the battery laminate 13 are directly contacted with each other to be electrically connected to each other. Since the contact area between the surfaces adjacent to each other and facing each other fluctuates according to the pressure of the laminating method, the battery laminate 13 has a structure in which the connection resistance fluctuates depending on the pressure.

The guide frame 14 has a structure for accommodating and supporting the battery laminate 13 in the inner space. The guide frame 14 has a pair of support frames 14a separated into two in the stacking direction of the battery laminate 13 and facing each other, and a pair of support frames 14a so as to be close to each other and separated from each other in the stacking direction of the battery laminate 13. It has a supporting rail 21 (FIG. 2).

The energizing terminals 15 at both ends are made of a conductive metal plate in this embodiment. These energizing terminals 15 form an action surface for pressurizing the battery laminate 13 in the stacking direction, and indirectly physically contact both end surfaces of the battery laminate 13 via the guide frame 14. There is. When the energizing terminals 15 at both ends are urged in a direction close to each other, the battery laminate 13 is arranged so that a force in the compression direction acts from both ends.
Further, each energizing terminal 15 is configured to be electrically connectable to the current collector 20 at the end of the battery stack 13, and in this embodiment, each energizing terminal 15 is a wiring extending from each current collector 20. It is connected so that it can be opened and closed via.

The restraint body 16 is made of a material that expands and contracts when energized. In this embodiment, a strip material made of a shape memory material that is energized and heated by Joule heat by directly energizing and shrinks by this heating is used.
Further, the restraint body 16 is preferably flexible, and for example, a shape memory wire can be preferably used.

The restraint body 16 surrounds and restrains the entire battery laminate 13 with the guide frame 14 interposed therebetween. In the present embodiment, the energizing terminals 15 arranged at both ends of the battery laminate 13 are connected without slack by a plurality of restraining bodies 16 arranged in the circumferential direction. In this state, the restraint body 16 contracts, so that the battery laminate 13 can be pressurized in the stacking direction via the support frame 14a.

Further, these restraint bodies 16 are connected between the two current collectors 20 via a charge / discharge circuit 12 and a restraint control circuit 22, and are connected in parallel with the charge / discharge unit 11 between the current collectors 20. The restraint circuit 17 is configured.
This restraint circuit 17 is a circuit for energizing a part of the electric power between the current collectors 20 at the time of charging / discharging of the charging / discharging unit 11 in parallel to a plurality of restraining bodies 16 and contracting them by energizing and heating each of them. is there. Preferably, the plurality of restraints 16 are equally contracted by applying electric power to them.

The charge / discharge unit 11 includes an energization switch 23 that opens and closes the restraint circuit 17, and a restraint control unit 24 that adjusts the energization amount of the restraint circuit 17 by the energization switch 23.
In the present embodiment, the restraint control unit 24 is provided in the charge / discharge unit 11 so that an open / close signal can be transmitted to the energization switch 23 when the charge / discharge unit 11 is charged / discharged.

In such a solid electrolyte battery module 10, as shown in FIG. 3, when the battery stack 13 energizes the charge / discharge unit 11 or the charge / discharge unit 11 energizes the battery stack 13 (S11), An open / close signal is transmitted to the energizing switch 23 by the restraint control unit 24 of the restraint control circuit 22 to close the power switch 23 (S12).

Then, the restraint circuit 17 is connected to the charge / discharge circuit 12, and a part of the current flowing from the battery stack 13 to the charge / discharge section 11 or a part of the current flowing from the charge / discharge section 11 to the battery stack 13 is a plurality of restraints. It flows in parallel with 16. As a result, each restraint body 16 is energized and heated, contracted and restrained, and the space between the energized terminals 15 of the battery laminate 13 is compressed (S13).
As a result, a large number of laminated solid electrolyte layers 18 and both electrode layers 19a and 19b are urged so that the facing surfaces are in close contact with each other and the resistance between the layers is reduced. Sufficient power is discharged or charged in the solid electrolyte battery module 10.

To disconnect the energization switch 23 from the restraint control unit 24 of the charging / discharging unit 11 when various preset conditions are satisfied (S14) or when charging / discharging is completed (S15) during this energizing period. When the signal of is transmitted, the energization switch 23 is cut off and the energization of each restraint body 16 is completed.
As a result, the temperature of each restraint body 16 decreases and extends, so that the pressurization of the battery laminate 13 by the restraint body 16 ends.

According to the solid electrolyte battery module 10 as described above, the restraint body 16 that restrains the battery laminate 13 and expands and contracts by energization is connected in parallel with the charge / discharge unit 11 between the current collectors 20 and is a restraint body at the time of charging / discharging. It is configured to energize 16. Therefore, during charging and discharging, the binding force of the restraint body 16 can be increased to pressurize in the stacking direction, and a sufficient contact area and contact pressure between the layers can be secured.
On the other hand, since the restraining force of the restraint body 16 becomes small except during charging / discharging, pressure and tension are not unnecessarily applied to the battery laminate 13 and the restraint body 16. Therefore, deterioration of the battery laminate 13 and the restraint body 16 can be suppressed.

Moreover, since the binding force is changed by energizing the restraint body 16 itself, it is not necessary to provide an operating device or the like that pressurizes the battery laminate 13 in the stacking direction, and the volume other than the battery laminate 13 can be suppressed to make it compact. .. Further, the weight other than the battery laminate 13 can be suppressed to reduce the weight.
Therefore, according to the first embodiment, the solid electrolyte battery module 10 which is compact and has excellent durability can be obtained.

In the solid electrolyte battery module 10, since the battery laminate 13 is surrounded and restrained by the restraint body 16 made of a flexible strip material, the battery laminate 13 is not bulky and the space for arranging the members for pressurizing in the stacking direction is significantly reduced. It can be suppressed or eliminated, and further compactness can be achieved.

In the solid electrolyte battery module 10, the energization switch 23 that opens and closes the restraint circuit 17 is controlled by the restraint control unit 24, so that the energization amount of the restraint body 16 can be adjusted at the time of charging / discharging, so that the battery laminate 13 is excessively added. It is easy to prevent pressure and insufficient contact area and contact pressure. Therefore, deterioration of the battery laminate 13 and the restraint body 16 can be easily suppressed.

In the solid electrolyte battery module 10, since the energization switch 23 of the restraint circuit 17 is opened and closed based on the open / close signal from the restraint control unit 24 of the charge / discharge unit 11, the restraint circuit 17 is operated in conjunction with the operation of the charge / discharge unit 11. It can be opened and closed appropriately, for example, it is possible to appropriately increase the binding force when charging and discharging, and to decrease the binding force when charging and discharging are excessive. Furthermore, it is possible to simplify the configuration of the control system.

[Second Embodiment]
As shown in FIG. 4, the solid electrolyte battery module 10 of the second embodiment is the same as that of the first embodiment except that the restraint control circuit 22 is different.
The restraint control circuit 22 of the second embodiment transfers the current flowing through the energization switch 23 that opens and closes the restraint circuit 17, the restraint current sensor 25 that detects the current flowing through the restraint circuit 17, and the charging / discharging portion 11 of the charging / discharging circuit 12. It includes a charge / discharge current sensor 26 for detecting, and a restraint control unit 24 for adjusting the energization amount of the restraint circuit 17 by an energization switch 23.

In the constraint control circuit 22 of this embodiment, the detection values of the constraint current sensor 25 and the charge / discharge current sensor 26 are transmitted to the constraint control unit 24, and the constraint control unit 24 determines the energization switch 23 based on these detected values. It is designed to open and close.

In the solid electrolyte battery module 10 of the second embodiment, as shown in FIG. 5, the battery stack 13 energizes the charge / discharge unit 11 and the charge / discharge unit 11 energizes the battery stack 13. When the charging / discharging circuit 12 is energized and a current is detected (S21), an open / close signal is transmitted from the restraint control unit 24 to the energizing switch 23 to close the current (S22).

Then, the restraint circuit 17 is connected to the charge / discharge circuit 12, and the plurality of restraint bodies 16 are energized in parallel. Each restraint body 16 is energized and heated to shrink, and restrains the battery laminate 13 (S23). The space between the energizing terminals 15 of the battery laminate 13 is compressed.
As a result, a large number of laminated solid electrolyte layers 18 and both electrode layers 19a and 19b are urged so that the facing surfaces are in close contact with each other, and sufficient electric power is generated or charged in the solid electrolyte battery module 10.

When the restraint circuit current becomes larger than the preset current value A2 during this energization period (S24), a signal for disconnecting the energization switch 23 is output from the restraint control unit 24 and the energization switch 23 is disconnected. Then, the energization of each restraint body 16 is completed (S25).
As a result, the temperature of each restraint body 16 decreases and extends, so that the pressurization of the battery laminate 13 by the restraint body 16 ends.

Even in the solid electrolyte battery module 10 of the second embodiment as described above, the binding force of the restraining body 16 is increased only during charging / discharging from the battery laminate 13, and the binding force is otherwise increased. Therefore, a compact and highly durable solid electrolyte battery module 10 can be obtained. Further, since the restraint body 16 is made of the same shape memory wire as in the first embodiment, it has flexibility, and the extra space around the battery laminate 13 can be made as small as possible. Further, since the energization amount of the restraint body 16 is adjusted by the energization switch 23, it is easy to appropriately adjust the pressure and tension of the battery laminate 13 and the restraint body 16.

Moreover, in the solid electrolyte battery module 10, current sensors 25 and 26 for detecting currents are provided in the charge / discharge unit 11 and the restraint circuit 17, respectively, and the current and the restraint circuit of the charge / discharge circuit 12 of the charge / discharge unit 11 are provided. The opening and closing of the energizing switch 23 is adjusted according to the current of 17. Therefore, the restraint circuit 17 can be opened and closed more appropriately, and the durability can be easily improved.

[Third Embodiment]
In the solid electrolyte battery module 10 of the third embodiment, as shown in FIG. 6, the battery laminate 13 is located between the support frame 14a and the battery laminate 13, specifically, at the end of the battery laminate 13 in the stacking direction. A binding force detecting unit 27 for detecting the binding force is provided.
The binding force detection unit 27 is composed of a pressure sensor, and has a configuration in which an output signal composed of a voltage corresponding to the pressure applied to the end portion of the battery stack 13 in the stacking direction is generated.

Further, as shown in FIG. 6, the restraint control circuit 22 in the solid electrolyte battery module 10 of the third embodiment includes an energization switch 23, a restraint current sensor 25, a charge / discharge current sensor 26, a restraint control unit 24, and the restraint control unit 24. It has. The constraint control circuit 22 is configured so that the output signal from the constraint force detection unit 27 is transmitted to the constraint control unit 24 and used for processing of the constraint circuit 17, and the constraint force from the constraint force detection unit 27. An open / close signal can be transmitted to the energization switch 23 based on the signal.
Other points are the same as those of the second embodiment.

In the solid electrolyte battery module 10 of the third embodiment, as shown in FIG. 7, the battery stack 13 energizes the charge / discharge unit 11 and the charge / discharge unit 11 energizes the battery stack 13. When the charge / discharge circuit 12 is energized and a current is detected (S31), an open / close signal is transmitted from the restraint control unit 24 to the energization switch 23 and the circuit is closed (S32).

Then, the restraint circuit 17 is connected to the charge / discharge circuit 12, and the plurality of restraint bodies 16 are energized in parallel. Each restraint body 16 is energized and heated to shrink, and restrains the battery laminate 13 (S33). The space between the energizing terminals 15 of the battery laminate 13 is compressed.
As a result, a large number of laminated solid electrolyte layers 18 and both electrode layers 19a and 19b are urged so that the facing surfaces are in close contact with each other, and sufficient electric power is generated or charged in the solid electrolyte battery module 10.

During this energization period, when a signal indicating a binding force larger than the predetermined value P3 is transmitted from the binding force detecting unit 27 (S34), a signal for disconnecting the energizing switch 23 is output from the restraint control unit 24 to energize. The switch 23 is cut off, the energization of each restraint body 16 ends, and the restraint ends (S36).
Further, when the current of the restraint circuit 17 becomes larger than the preset current value A3 (S35), a signal for disconnecting the energization switch 23 is output from the restraint control unit 24, and the energization switch 23 is disconnected. The energization of each restraint body 16 is completed, and the restraint is completed (S36).

Even in the solid electrolyte battery module 10 of the third embodiment, the binding force of the restraining body 16 is increased only during charging / discharging from the battery stack 13 as in the first embodiment, and the binding force is otherwise increased. Therefore, a compact and highly durable solid electrolyte battery module 10 can be obtained. Further, since the restraint body 16 is made of the same shape memory wire as in the first embodiment, it has flexibility, and the extra space around the battery laminate 13 can be made as small as possible. Further, since the energization amount of the restraint body 16 is adjusted by the energization switch 23, it is easy to appropriately adjust the pressure and tension of the battery laminate 13 and the restraint body 16.

Moreover, in the solid electrolyte battery module 10, since the pressure actually applied to the battery laminate 13 can be directly measured by the pressure sensor, the energization switch 23 can be opened and closed more appropriately according to the binding force of the battery laminate 13. Can be adjusted. Therefore, it is possible to prevent the battery laminate 13 from being restrained by an excessive restraining force, and it is possible to reliably improve the durability.

Next, a modified example of the third embodiment will be described.
FIG. 8 is a modified example of the third embodiment. In the solid electrolyte battery module 10 of the fourth embodiment, a tension sensor is provided on the restraint body 16 as the binding force detecting unit 27 instead of the pressure sensor of the battery laminate 13.
In the solid electrolyte battery module 10, instead of directly measuring the pressure applied to the battery laminate 13 as in the third embodiment described above, the tension applied to the restraint body 16 is directly measured by the tension sensor. ing.

Even with such a configuration, the same effect as that of the third embodiment can be obtained, the opening and closing of the energization switch 23 can be adjusted more appropriately according to the binding force of the battery laminate 13, and the battery. It is possible to prevent the laminated body 13 from being restrained by an excessive restraining force and to surely improve the durability.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within a range not deviating from the gist of the present invention are also included.
For example, in each of the above embodiments, a plurality of pairs of positive electrode layers 19a and negative electrode layers 19b are arranged between the pair of current collectors 20 with the solid electrolyte layer 18 interposed therebetween, but they are provided in series or in parallel with each other. A pair or a plurality of pairs of positive electrode layers 19a and a negative electrode layer 19b may be arranged so as to sandwich the solid electrolyte layer 18 between the plurality of pairs of current collectors 20 layers, respectively.
Further, in each of the above embodiments, an example in which the outer periphery of the battery laminate 13 is surrounded by the restraint body 16 and the energizing terminal 15 in an annular shape has been described, but if the arrangement is such that both ends of the battery laminate 13 can be compressed in the stacking direction. It is not limited in any way. For example, it is also possible to arrange hard members at both ends of the battery laminate 13 and to connect and restrain the hard members by the restraint body 16.

10 Solid electrolyte battery module 11 Charging / discharging section 12 Charging / discharging circuit 13 Battery stack 14 Guide frame 14a Support frame 15 Current-carrying terminal 16 Restraint 17 Restraint circuit 18 Solid electrolyte layer 19a Positive electrode layer 19b Negative electrode layer 20 Current collector 21 Rail 22 Constraint control circuit 23 Energization switch 24 Constraint control unit 25 Constraint current sensor 26 Charge / discharge current sensor 27 Constraint force detection unit

Claims (6)

A battery laminate in which a solid electrolyte layer and an electrode layer are laminated between current collectors,
A restraint body configured to be able to pressurize in the stacking direction by restraining the battery laminate and expanding and contracting by energization.
A restraint circuit that is connected in parallel with the charge / discharge section connected between the current collectors and energizes the restraint body with a part of the electric power between the current collectors when the charge / discharge section is charged / discharged.
A guide frame composed of a pair of support frames that accommodate the battery laminate in the inner space, are separated into two in the stacking direction of the battery laminate, and face each other.
A rail that supports the pair of support frames of the guide frame so as to be close to and separated from each other in the stacking direction of the battery laminate.
An energizing terminal arranged so as to indirectly physically contact both end surfaces of the battery laminate via the guide frame is provided.
The energizing terminals arranged at both ends of the battery laminate are connected by the restraints arranged in the circumferential direction.
Solid electrolyte battery module. The solid electrolyte battery module according to claim 1, wherein the restraint body is made of a strip material that has flexibility and is heated by energization and contracts, and surrounds and restrains the battery laminate. An energizing switch that opens and closes the restraint circuit,
A restraint control unit that adjusts the energization amount of the restraint circuit by the energization switch,
The solid electrolyte battery module according to claim 1 or 2. The solid electrolyte battery module according to claim 3, wherein the restraint control unit is provided in the charge / discharge unit, and an open / close signal is transmitted to the energization switch when the charge / discharge unit is charged / discharged. The charge / discharge unit has a charge / discharge current sensor that detects a current.
The restraint circuit has a restraint current sensor that detects a current.
The solid electrolyte battery module according to claim 3, wherein the restraint control unit transmits an open / close signal for adjusting the open / close of the energization switch based on the current detection signal from each sensor. The restraint body has a binding force detecting unit for detecting the binding force of the battery laminate.
The solid electrolyte battery module according to claim 3, wherein the binding force detecting unit transmits an opening / closing signal for adjusting the opening / closing of the energization switch based on the binding force signal from the binding force detecting unit.

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