JP6241176B2 - Power supply module and shock absorber - Google Patents

Description

  The present invention relates to a power supply module including a storage element such as a secondary battery or other batteries, and a shock absorber used therefor.

  Secondary batteries are widely used as power sources for electronic devices such as mobile phones and IT devices, as well as for replacing primary batteries. In particular, non-aqueous electrolyte secondary batteries represented by lithium ion secondary batteries have high energy density, and are therefore being applied to large industrial electric equipment such as electric vehicles. In general, it is used as a power supply module in order to increase the capacity and capacity.

  The power supply module has a configuration in which a plurality of nonaqueous electrolyte secondary batteries arranged at equal intervals are housed in a casing. And each electrode terminal of a nonaqueous electrolyte secondary battery is connected, and it functions as one power source of high voltage and large capacity (for example, refer to patent documents 1, FIG. 1, etc.).

JP 2005-322647 A

  In the conventional power supply module having the above-described configuration, the non-aqueous electrolyte secondary batteries are arranged with a space therebetween, thereby ensuring a heat dissipation path in the housing and preventing overheating of the entire device. ing. In the nonaqueous electrolyte secondary battery, gas is generated inside by repeating charging and discharging, and a container which is an exterior body that stores the electrode body and the electrolytic solution expands. Thereby, the space | interval of nonaqueous electrolyte secondary batteries will reduce or will contact, and there existed a possibility that the thermal radiation effect might fall.

  In order to secure a heat dissipation path, spacers made of silicon rubber, polypropylene, or other synthetic resin are usually arranged between adjacent nonaqueous electrolyte secondary batteries to prevent contact between the expanded batteries. However, when the nonaqueous electrolyte secondary battery expands, the spacers sandwiched between the batteries are deformed, and it is not possible to ensure a sufficient distance between the batteries.

  The present invention has been made in view of the above problems, and a power supply module capable of sufficiently securing a separated state corresponding to the expansion of a nonaqueous electrolyte secondary battery or other power storage element, and a shock absorber used therefor The purpose is to provide.

In order to achieve the above object, the first aspect of the present invention provides:
At least two adjacent power storage elements;
A shock absorber disposed between the adjacent power storage elements,
The shock absorber is
It has a plate-like main body that is bent or bent periodically,
In the main body,
A contact surface that is located on a convex surface generated by a convex curve or bend of the main body portion, and that alternately contacts the respective surfaces of the adjacent power storage elements;
Located on the concave surface generated by the concave bending or bending of the main body portion, and opposed surfaces alternately opposed to the respective surfaces of the adjacent power storage elements are formed,
A protruding portion protruding from the surface of the adjacent power storage element is formed on all or a part of the facing surface.
It is a power supply module.

The second aspect of the present invention is
The protruding portion forms a protrusion extending along the extending direction of the concave surface,
It is a power supply module of the 1st side of the present invention.

The third aspect of the present invention is
The protrusion has a through hole that penetrates both ends of the protrusion,
It is a power supply module of the 2nd side surface of this invention.

The fourth aspect of the present invention is
A shock absorber disposed between at least two adjacent power storage elements,
It has a plate-like main body that is bent or bent periodically,
In the main body,
A contact surface that is located on a convex surface generated by a convex curve or bend of the main body portion, and that alternately contacts the respective surfaces of the adjacent power storage elements;
Located on the concave surface generated by the concave bending or bending of the main body portion, and opposed surfaces alternately opposed to the respective surfaces of the adjacent power storage elements are formed,
A protruding portion that protrudes from the other surface of the adjacent power storage element is formed on all or part of the facing surface.
It is a shock absorber.

In the present invention, as another aspect, the tip of the protrusion is flat.
It may be a power supply module.

According to another aspect of the present invention, the tip of the protrusion is curved.
It may be a power supply module.

As another aspect of the present invention,
The protrusion is in contact with the other surface of the electricity storage device;
It may be a power supply module.

As another aspect of the present invention,
A plurality of the protrusions are formed for each of the opposing surfaces, and are arranged along the extending direction of the concave surface.
It may be a power supply module.

As another aspect of the present invention,
The protrusion is formed at a position corresponding to the center of each surface of the pair of power storage elements.
It may be a power supply module.

As another aspect of the present invention,
The protruding portion is formed intermittently across the plurality of facing surfaces.
It may be a power supply module.

  The present invention as described above has an effect that a power supply module having a power storage element can sufficiently secure a separated state against the expansion of the power storage element.

The perspective view which shows typically the structure of the power supply module which concerns on Embodiment 1 of this invention. The perspective view which shows the structure of the buffer in the power supply module which concerns on Embodiment 1 of this invention. The side view which shows the structure of the buffer in the power supply module which concerns on Embodiment 1 of this invention. (A) The figure for demonstrating the effect of the buffer in the power supply module which concerns on Embodiment 1 of this invention (b) In order to demonstrate the effect of the buffer in the power supply module which concerns on Embodiment 1 of this invention Figure of (A) Side view showing the configuration of the shock absorber in the power supply module according to Embodiment 2 of the present invention (b) Side view showing another configuration example of the shock absorber in the power supply module according to Embodiment 2 of the present invention (A) Side view showing the configuration of the shock absorber in the power supply module according to Embodiment 3 of the present invention (b) Side view showing another configuration example of the shock absorber in the power supply module according to Embodiment 3 of the present invention (A) Side view showing the configuration of the shock absorber in the power supply module according to Embodiment 4 of the present invention (b) Side view showing another configuration example of the shock absorber in the power supply module according to Embodiment 4 of the present invention (A) Side view showing another configuration example of the shock absorber in the power supply module according to the embodiment of the present invention (b) Side view showing another configuration example of the shock absorber in the power supply module according to the embodiment of the present invention The perspective view which shows the other structural example of the buffer in the power supply module which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
(1. Power supply module)
FIG. 1 is an exploded perspective view showing the configuration of the power supply module 1 according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view showing the configuration of a shock absorber 40 used in the power supply module 1.

  As shown in FIG. 1, the power supply module according to the first embodiment includes a plurality of nonaqueous electrolyte secondary batteries 10 having a rectangular column shape and a base frame 20 on which the nonaqueous electrolyte secondary batteries 10 are placed. And a housing 30 that houses the base frame 20 and the nonaqueous electrolyte secondary battery 10.

  The nonaqueous electrolyte secondary battery 10 has a container composed of an open box container body 11 made of aluminum and a plate-shaped lid portion 12 made of the same material as the container body 11, and the electrode body and the electrolysis are contained in the container. Contains liquid. Moreover, positive and negative electrode terminals 13 connected to the internal electrode body, a safety valve 14 opened when the internal pressure of the container exceeds a predetermined value, and an electrolyte injection port are sealed on the main surface of the lid 12. A sealing plug 15 is provided.

  The nonaqueous electrolyte secondary battery 10 is arranged on the base frame 20 so that the longitudinal sides of the container body 11, that is, the longitudinal side surfaces 11 a that are side surfaces along the Y-axis direction in the drawing, which will be described later, face each other.

  The base frame 20 is a synthetic resin base having a placement surface 21 on which the nonaqueous electrolyte secondary battery 10 is placed. A concave portion having a shape corresponding to the bottom surface of the container body 11 of the nonaqueous electrolyte secondary battery 10 is provided on the mounting surface 21 so that the nonaqueous electrolyte secondary battery 10 placed on the base frame 20 is equidistant. You may make it position so that it may be arranged by.

  The housing 30 is a hollow hexahedral container made of metal or synthetic resin, and sandwiches and fixes a plurality of nonaqueous electrolyte secondary batteries 10 together with a buffer 40 described later. In addition, you may provide the end plate and other fastening members which clamp the nonaqueous electrolyte secondary battery 10 as a unit separately from the housing 30.

  The arrangement direction of the nonaqueous electrolyte secondary battery 10 is on a straight line parallel to the X axis in the orthogonal coordinate system of the X axis, the Y axis, and the Z axis shown in FIG. Each surface of the body 30 is positioned in parallel with the X axis, the Y axis, and the Z axis. In the following description, the direction from the back to the front, the right to the left, and the bottom to the top are determined based on the direction of the arrow in the figure.

  Between the adjacent nonaqueous electrolyte secondary batteries 10 and between the inner wall of the housing 30 and the long side surface 11a of the nonaqueous electrolyte secondary battery 10, a planar rectangular shape located parallel to the long side surface 11a is formed. A shock absorber 40 is disposed. The detailed configuration of the shock absorber 40 will be described later.

  In FIG. 1, for the purpose of explanation, the electrode terminals of the entire power supply module 1 provided in the housing 30, the management device that manages charge and discharge, and the bus bar that connects the electrode terminals 13 of each nonaqueous electrolyte secondary battery 10 to each other. Etc. are omitted.

  In the above configuration, the power supply module 1 corresponds to the power supply module of the present invention, the nonaqueous electrolyte secondary battery 10 corresponds to the power storage element of the present invention, and the buffer 40 corresponds to the buffer of the present invention.

  The power supply module 1 having such a configuration is characterized by including a shock absorber 40. Hereinafter, the configuration of the shock absorber 40 will be described in detail, and an embodiment of the shock absorber according to the present invention will be described.

(2. Shock absorber)
FIG. 2 is a perspective view showing the configuration of the shock absorber 40 according to the first embodiment, and FIG. 3 is a side view of the shock absorber 40.

  As shown in each of the above drawings, the shock absorber 40 is composed of a base material 41 having a rectangular front shape extending on a Z-Y axis plane orthogonal to the X axis in the figure, which is the arrangement direction of the nonaqueous electrolyte secondary batteries 10. Is done. The material of the base material 41 is a synthetic resin or other insulating material having heat resistance and impact resistance, such as polycarbonate, and has an aspect that is alternately bent along the height direction.

  That is, as shown in FIG. 3, the base material 41 has a facing surface 42 a formed on one main surface and opposed to the longitudinal side surface 11 a of the adjacent nonaqueous electrolyte secondary battery 10. And a convex portion 44 having a contact surface 44a that contacts the longitudinal side surface 11a of the nonaqueous electrolyte secondary battery 10 and is formed as an inverted shape of the concave portion 42 on the other main surface. The recesses 42 and the protrusions 44 are formed alternately and continuously in the height direction of the shock absorber 40, sharing the transition wall 45 that is a part of the base material 41. Thereby, the opposing surface 42a and the contact surface 44a are arrange | positioned at both the main surfaces of the base material 41, changing direction to right and left. Further, as shown in FIG. 2, the facing surface 42 a and the contact surface 44 a extend in the left-right direction (Y-axis direction) of the base material 41 and form parallel rows.

  Next, as shown in FIG. 2, a protrusion 43 is provided in the recess 42 so as to extend in the left-right direction of the base material 41 in parallel with the facing surface 42 a.

  The protrusion 43 is similar to the convex portion 44 and is a portion having a trapezoidal cross-sectional shape in the XZ plane in the figure, and is opposed to the opposing surface 43a that is spaced apart and opposed to the longitudinal side surface 11a of the nonaqueous electrolyte secondary battery 10. And a crossing wall 43b connecting the opposing surfaces 42a and 43a. Furthermore, a through-hole 43 c that is similar to the cross-sectional shape of the ridge 43 and communicates with the left and right ends of the shock absorber 40 is formed inside the ridge 43. In addition, it is desirable that the concave portion 42, the protrusion 43, and the convex portion 44 are integrally formed with the base material 41 by injection molding or the like.

  In the above configuration, the contact surface 44a corresponds to the contact surface of the present invention, and the facing surface 42a corresponds to the facing surface of the present invention. Moreover, the protrusion 43 is corresponded to the protrusion part which forms the protrusion of this invention. The contact surface 44a and the surface 45a of the crossover wall 45, which are the surfaces of the convex portions 44, correspond to the convex surfaces of the present invention. The opposing surface 42a and the surface 45a of the crossing wall 45, which are the surfaces of the recess 42, correspond to the concave surface of the present invention.

  The function of the shock absorber 40 in the power supply module 1 of the first embodiment will be described with further reference to each of the above drawings and FIGS. 4 (a) and 4 (b).

  First, as shown in FIG. 4A, when the shock absorber 40 is disposed between the adjacent nonaqueous electrolyte secondary batteries 10 in the power supply module 1, one of the nonaqueous electrolyte secondary batteries 10a is provided. The contact surfaces 44a of the projections 44 are alternately in contact with the longitudinal side surface 11a1 and the longitudinal side surface 11b1 of the other non-aqueous electrolyte secondary battery 10b along the vertical direction, and are opposed to the recesses 42. A set of surfaces 42a and opposed surfaces 43a of the ridges 43 are alternately arranged facing each other.

  As a result, the nonaqueous electrolyte secondary batteries 10a and 10b are placed on the base frame 20 with a certain distance therebetween via the transition wall 45, and the long side surface 11b1, the opposing surface 42a, and the opposing surface 43a. The gap C1 formed by the surface 45a of the crossover wall 45 functions as a heat dissipation path, and cools the nonaqueous electrolyte secondary battery 10a or 10b by circulating outside air.

  Next, as shown in FIG. 4B, the nonaqueous electrolyte secondary batteries 10a and 10b press the shock absorber 40 from both main surfaces of the base material 41 when the container is expanded due to charge / discharge or the like. However, at this time, the crossing wall 45 that is inclined with respect to the X axis in the drawing, which is the arrangement direction of the batteries, is inclined so as to spread with respect to the facing surface 42a due to pressure. As a result, the base material 41 extends in the vertical direction and is deformed flat as a whole. However, the opposing surface 43a of the ridge 43 contacts the left and right ends of the long side surfaces 11a1 and 11a2, and the connecting wall 43b is on the long side. The side surfaces 11a1 and 11a2 are supported. Thereby, it is suppressed that the base material 41 deform | transforms more than fixed. Furthermore, in addition to the gap C2 formed by the surface 43b1 of the transition wall 43b of the protrusion 43, the facing surface 42a of the recess 42 and the surface 45a of the transition wall 45, the through hole 43c of the protrusion 43 is transmitted from the facing surface 43a. As a heat dissipation path for heat, the heat dissipation function is suppressed from decreasing before and after the deformation of the base material 41.

  As described above, according to the power supply module 1 of the first embodiment, the contact surfaces 44a that alternately contact adjacent nonaqueous electrolyte secondary batteries, the opposite surfaces 42a that alternately face each other, and the protruding from the opposite surface 42a. By providing the shock absorber 40 having the protruding protrusion 43, it is possible to sufficiently secure the separation state between the batteries in response to the expansion of the nonaqueous electrolyte secondary battery or other power storage element as a single cell, and high reliability. Can be earned.

(Embodiment 2)
The power supply module according to the second embodiment of the present invention is characterized in that, in the configuration of the first embodiment, a shock absorber 50 shown in the side view of FIG. Hereinafter, description will be given with reference to the drawings. However, the same or corresponding components as those in FIGS. 1 and 2 are denoted by the same reference numerals and detailed description thereof is omitted. The same applies to the description of the following embodiments.

  The shock absorber 50 according to the second embodiment is characterized in that the protrusion provided on the recess 42 includes a protrusion 43 having a through hole 43c and a protrusion 53 having no through hole.

  The mode of deformation of the nonaqueous electrolyte secondary battery 10 due to long-term use or overcharge / discharge depends on the shape of the container or the position of the electrode body to be stored, but is a rectangular prism shape of an outer shape in which the container is widely used. In this case, the deformation becomes the largest mainly in the vicinity of the center of gravity of the longitudinal side surface 11a. This means that in the power supply module, the strongest pressing is applied to the center between adjacent batteries.

  The second embodiment is configured by paying attention to this point, and the protrusion 53 provided in the recess 42 adjacent to the vicinity of the center of the longitudinal side surface 11a omits the through hole and has a dense content. It is configured. On the other hand, in the vicinity of the upper and lower ends of the long side surface 11a, the radiating path is secured by providing the protrusions 43 having the through holes 43c as in the first embodiment.

  As a result, the strength of the battery in the arrangement direction, that is, the direction along the X direction in the figure is increased, and the protrusions are prevented from being deformed by the pressure of the nonaqueous electrolyte secondary battery 10, and the thickness and gap of the buffer itself Is secured.

  In the above description, the protrusion 53 having no through-hole is provided in the recess 42 adjacent to the vicinity of the center of the longitudinal side surface 11a, but the cushion 60 shown in FIG. Thus, it is good also as a structure provided in the upper-lower-end vicinity of the longitudinal side 11a. This has the following effects. That is, the heat generation of the nonaqueous electrolyte secondary battery 10 due to long-term use and overcharge / discharge also depends on the shape of the container and the position of the electrode body, and the highest temperature is considered to be near the center of gravity of the long side surface 11a. .

  Therefore, for the protrusion adjacent to the vicinity of the center of the long side surface 11a, the heat dissipation path is secured by using the same protrusion 43 as in the first embodiment, while the protrusion is in the vicinity of the upper and lower ends of the long side surface 11a. By providing 53, the strength is increased. This also ensures a sufficient separation between the batteries and suppresses the high temperature of the power supply module. The shock absorber 60 is suitable when the power supply module 1 is constituted by the nonaqueous electrolyte secondary battery 10 having a container having a pressure resistance greater than that when the shock absorber 50 is used.

  Furthermore, it is good also considering all the protrusions which a buffer has as the protrusion 53 which does not have a through-hole. In this case, the reinforcement of the shock absorber is given priority over securing the heat dissipation path, which is suitable for suppressing the expansion of the nonaqueous electrolyte secondary battery 10.

(Embodiment 3)
The power supply module according to the third embodiment of the present invention is characterized in that, in the configuration of the first embodiment, the shock absorber 70 shown in the side view of FIG.

  The shock absorber 70 according to the third embodiment includes a protrusion 73 having a rectangular cross-sectional shape along the extending direction of the protrusion itself, that is, the Y direction passing through the front and back of the drawing in the drawing, with respect to the protrusion provided on the recess 42. . As with the ridge 43 of the first embodiment, the ridge 73 connects the facing surface 73 a that faces the longitudinal side surface 11 a of the nonaqueous electrolyte secondary battery 10, and the connection that connects the facing surface 73 a and the facing surface 42 a of the recess 42. And a wall 73b. The transition wall 73b is provided between the facing surface 42a and the facing surface 73a so as to be parallel to the arrangement direction of the nonaqueous electrolyte secondary batteries 10, that is, the X direction in the drawing.

  In the third embodiment having such a configuration, since the crossover wall 73b is parallel to the arrangement direction of the nonaqueous electrolyte secondary battery 10, the risk of breakage and deformation of the crossover wall 73b is reduced, and the nonaqueous electrolyte is reduced. The pressure accompanying the expansion of the secondary battery 10 is transmitted from the facing surface 73a to the facing surface 42a of the recess 42 as it is. As a result, the strength of the battery in the arrangement direction, that is, the direction along the X direction in the figure is increased, and the protrusions are prevented from being deformed by the pressure of the nonaqueous electrolyte secondary battery 10, and the thickness and gap of the buffer itself Is ensured, and the separation state between the batteries can be sufficiently secured to obtain high reliability.

  Furthermore, as reinforcement of the protrusions in the arrangement direction of the battery, as in the shock absorber 80 shown in FIG. 6B, a structure including a protrusion 83 having a through hole 83b and a curved surface having an arc shape in cross section. It is good. In this case, the protrusion 83 has a wall body 83a formed by connecting the opposing surface and the crossing portion without a boundary, and is in line contact with the longitudinal side surface 11a when the nonaqueous electrolyte secondary battery 10 is expanded. Become. Thereby, the intensity | strength of the arrangement direction of a battery can further be raised. In addition, since the contact between the wall 83a and the long side surface 11a is performed through a curved surface, the possibility of causing scratches, cracks, etc. on the surface of the long side surface 11a can be reduced, and further reliability can be obtained. .

  In the shock absorber 80, the boundary between the concave portion 42 and the convex portion 44 and the crossing wall 45 is also a curved surface, and the base material 41 is alternately curved. However, the contact surface 44a is also formed with the protrusion 83. The same effect is produced.

(Embodiment 4)
The power supply module according to Embodiment 4 of the present invention is characterized in that, in the configuration of Embodiment 1, a buffer 90 shown in the side view of FIG.

  The buffer 90 is provided with the recessed part 42 which has the protrusion 43 similarly to Embodiment 1, and the recessed part 91 which does not have a protrusion about a recessed part. This produces the following effects. That is, as described in the second embodiment, the deformation mode of the nonaqueous electrolyte secondary battery 10 depends on the shape of the container or the position of the electrode body to be stored, and the outer rectangular shape in which the container is generally used. In the case of a prismatic shape, the deformation becomes the largest mainly in the vicinity of the center of gravity of the long side surface 11a.

  Therefore, in the shock absorber 90, the protrusions 43 are provided only in the recesses 42 adjacent to the vicinity of the center of the longitudinal side surface 11a, while the recesses 91 in which the protrusions are omitted are provided in the vicinity of the upper and lower ends of the longitudinal side surface 11a. This ensures a longer heat dissipation path. Thereby, it is possible to increase the strength in the arrangement direction of the batteries and improve the heat dissipation effect.

  In the above description, the protrusion 43 is provided only in the recess 42 adjacent to the vicinity of the center of the longitudinal side surface 11a. However, the reason is the same as that of the configuration example of FIG. 5B of the second embodiment. Therefore, it may be configured to be provided only in the vicinity of the upper and lower ends of the long side surface 11a.

  Further, as in the shock absorber 100 shown in FIG. 7B, the protrusions 43 may be arranged in such a manner that the concave portions 91 are sandwiched in the vertical direction of the longitudinal side surface 11a and are distributed at equal intervals. In this case, the strength and heat dissipation performance are averaged over the entire main surface of the shock absorber 100, and high versatility independent of the shape, internal structure, quality, and rating of the nonaqueous electrolyte secondary battery 10 built in the power supply module. Can be provided. Depending on the number of the concave portions 42 and the convex portions 44, the protrusions 43 may be arranged at indefinite intervals.

  As described above, the power supply module according to the embodiment of the present invention includes a contact surface that alternately contacts adjacent nonaqueous electrolyte secondary batteries, an opposite surface that alternately faces, and a protruding portion that protrudes from the opposite surface. By providing the shock absorber having the protrusions, it is possible to sufficiently secure a separation state between the batteries and obtain high reliability in response to the expansion of the nonaqueous electrolyte secondary battery.

  However, the present invention is not limited to the above embodiments.

  In each of the above embodiments, the shock absorber of the present invention is separated from the longitudinal side surface 11a of the non-aqueous electrolyte secondary battery 10 before expansion, as shown on the opposing surface 43a of the protrusion 43. Although described as being located, it may be configured to contact.

  Specifically, as shown as the protrusion 113 of the shock absorber 110 of FIG. 8A, the shock absorber is removed from the state before expansion by making the opposing surface 113a flush with the contact surface 44a of the convex portion 44. Reinforcing makes it possible to suppress deformation of the nonaqueous electrolyte secondary battery. In the protrusion 113, the through hole 113c has the same shape as the through hole 43c of the first embodiment. However, by providing it close to the facing surface 42a of the recess 42, the contact surface 44a that is the back surface of the facing surface 42a is provided. Heat transfer can be quickly released. On the other hand, like the through hole 123c of the shock absorber 120 in FIG. 8B, the thickness of the convex portion 44 is substantially enlarged by increasing the strength of the shock absorber by providing it close to the facing surface 113a. It may be.

  In each of the above embodiments, the protrusion of the shock absorber according to the present invention has been described as protrusions extending to the left and right ends of the base material 41 as shown in the protrusion 43. As long as the protruding portion protrudes from the opposing surface toward the surface of the power storage element, the shape of the opposing surface, the protruding aspect, and the like may have any shape. As an example, the shock absorber 130 shown in FIG. 9 has a plurality of convex pyramid-shaped convex portions 133 that are intermittently arranged on the facing surface 42a of the concave portion 42 as protruding portions.

  The protrusions 133 are intermittently arranged at regular intervals in the left-right direction, so that the gap between the protrusions 133 communicates with the recesses 42. Thereby, after the non-aqueous electrolyte secondary battery 10 is expanded, a sufficient heat radiation path is secured even after the facing surface 133a contacts the longitudinal side surface 11a. Furthermore, the number of protrusions may be arbitrary.

  Furthermore, the configurations of the above-described first to fourth embodiments and the like including the buffer 130 shown in FIG. 9 may be implemented in any combination.

  In the above description, the cushioning device of the present invention, the contact surface 44a as the contact surface and the opposing surface, and the planar shape of the opposing surface 42a, that is, the shape in the YZ plane in the figure are all assumed to be rectangular. It was. On the other hand, the contact surface and the opposing surface of the present invention are not limited by the shape as long as they are arranged in contact with or separated from each surface of the adjacent power storage element, and are oval and elliptical. Polygons and other arbitrary shapes may be used. However, it is desirable to follow the shape of the long side surface 11a of the non-aqueous electrolyte secondary battery 10 disposed so as to face each other, and as shown in the first to fourth embodiments, the protruding portion has a contact surface and a facing surface, It is most desirable to extend along the left-right direction of the container for storing the storage element. On the other hand, the contact surface 44a, the opposing surface 42a, and the protrusion 43 may be configured to extend in the vertical direction, that is, the Z direction in the drawing, in addition to the configuration illustrated in FIG.

  Furthermore, in the above description, the contact surface and the facing surface of the present invention are concave portions that share the transition wall 45 that are formed alternately and continuously in the height direction of the shock absorber 40 when the base material 41 is bent. 42 and the convex portion 44. That is, in each embodiment, the main body of the present invention is bent periodically to produce the contact surface and the opposing surface having the same shape.

  However, the contact surface and the opposing surface of the present invention may be formed by bending or bending the main body, and are not limited by the curved or bent mode. The term “curved or bent” means that the number of times of bending or bending is necessary for the generation of at least one contact surface and at least one opposing surface, respectively. Need not all be the same in the main body. Therefore, the contact surface and the opposing surface may have different numbers, dimensions, sizes, and shapes. The contact surfaces of the plurality of contact surfaces may have different sizes, sizes, and shapes. Similarly, in a plurality of opposing surfaces, the opposing surfaces may have different sizes, sizes, and shapes.

  In the above description, the power supply module 1 is provided with the shock absorber 40 and the like as the shock absorber of the present invention between all the nonaqueous electrolyte secondary batteries 10, but at least a pair of adjacent nonaqueous electrolytes. A configuration including the shock absorber of the present invention between the secondary batteries 10 is also included in the power supply module of the present invention.

  In the above description, the storage element of the present invention is the non-aqueous electrolyte secondary battery 10 typified by a lithium ion secondary battery. However, if the battery can be charged / discharged by an electrochemical reaction, it is nickel hydride. A battery or other various secondary batteries may be used. Moreover, a primary battery may be sufficient. In short, the power storage element of the present invention is not limited by a specific method for generating an electromotive force as long as it is an element that can store electricity by enclosing a power generation element and an electrolyte in a container.

  In short, the present invention may be implemented by adding various modifications to the above-described embodiment, including those described above, as long as they do not depart from the spirit of the present invention.

  The present invention as described above has an effect that it is possible to sufficiently secure a separated state corresponding to the expansion of the power storage element in the power supply module having the power storage element, and is useful in, for example, a power supply module having a secondary battery. It is.

DESCRIPTION OF SYMBOLS 1 Power supply module 10 Nonaqueous electrolyte secondary battery 11 Container main body 11a Long side surface 12 Lid part 13 Electrode terminal 14 Safety valve 15 Seal plug 20 Base frame 21 Mounting surface 30 Housing 40 Buffer 41 Base material 42 Recessed part 42a Opposite surface 43 Projection 43a Opposing surface 43b Transition wall 43c Through hole 44 Protrusion 44a Contact surface 45 Transition wall 45a Surface

Claims (4)

At least two adjacent power storage elements;
A shock absorber disposed between the adjacent power storage elements,
The shock absorber is
It has a plate-like main body that is bent or bent periodically,
In the main body,
A contact surface that is located on a convex surface generated by a convex curve or bend of the main body portion, and that alternately contacts the respective surfaces of the adjacent power storage elements;
Located on the concave surface generated by the concave bending or bending of the main body portion, and opposed surfaces alternately opposed to the respective surfaces of the adjacent power storage elements are formed,
A projecting portion projecting from the surface of the adjacent power storage element is formed on all or a part of the facing surface ,
The back surface of the opposing surface of the main body portion on which the protruding portion is formed forms a plane.
Power supply module. The protrusion forms a protrusion extending along a direction orthogonal to the direction of bending or bending the concave surface,
The power supply module according to claim 1. The protrusion has a through hole that penetrates both ends of the protrusion,
The power supply module according to claim 2. A shock absorber disposed between at least two adjacent power storage elements,
It has a plate-like main body that is bent or bent periodically,
In the main body,
A contact surface that is located on a convex surface generated by a convex curve or bend of the main body portion, and that alternately contacts the respective surfaces of the adjacent power storage elements;
Located on the concave surface generated by the concave bending or bending of the main body portion, and opposed surfaces alternately opposed to the respective surfaces of the adjacent power storage elements are formed,
Wherein all or part of the facing surface, which projection projecting in front Symbol table surface is formed of the adjacent storage element,
The back surface of the opposing surface of the main body portion on which the protruding portion is formed forms a plane.
Shock absorber.

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