CN115513588A - battery module - Google Patents

Abstract

The invention relates to the field of batteries, and provides a battery module which comprises a battery core group, a cover plate, an end plate, a flexible circuit board and an insulating plate, wherein the cover plate is arranged on one side of the battery core group in the height direction; the end plates are arranged at the end parts of the electric core group in the length direction and connected with the cover plate, and the joint of the end plates and the cover plate is an end cover joint; the flexible circuit boards are arranged between the cover plate and the electric core group and between the end plate and the electric core group; the insulation board is connected in the end plate towards one side of electric core group, and the insulation board is equipped with the separation structure relative with the flexible circuit board, and the separation of separation structure is between end cover junction and flexible circuit board. This battery module accessible body coupling is between end cover junction and flexible circuit board in the separation structure separation of insulation board, so, when carrying out the operation of being connected of end plate and apron, flexible circuit board is effectively protected to accessible separation structure to can reduce the temperature of connecting the operation, connect the influence of material etc. to the performance of flexible circuit board, can reduce the risk of flexible circuit board damage.

Description

battery module

technical field

The invention belongs to the technical field of batteries, in particular to a battery module.

Background technique

When the existing battery module is connected to the cover plate and the end plate by means of welding, it may cause certain damage to the flexible circuit board inside the cover plate and the end plate, thereby affecting the performance of the battery module.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a battery module to solve the problem that the existing battery module may cause damage to the flexible circuit board inside the cover plate and the end plate when the cover plate and the end plate are connected by welding or the like. technical problem.

In order to achieve the above purpose, the technical solution adopted by the present invention is: a battery module, comprising:

battery pack;

The cover plate is arranged on one side of the cell pack in the height direction;

The end plate is arranged at the end of the cell group in the length direction, the end plate is connected to the cover plate, and the connection between the end plate and the cover plate is the end cover connection;

A flexible circuit board is arranged between the cover plate and the battery pack, and/or, between the end plate and the battery pack;

The insulating plate is connected to the side of the end plate facing the battery pack, and the insulating plate is provided with a blocking structure opposite to the flexible circuit board, and the blocking structure is blocked between the joint of the end cover and the flexible circuit board.

By adopting the above scheme, the barrier structure integrally connected to the insulating plate can be blocked between the joint of the end cover and the flexible circuit board. In this way, when performing welding and other connection operations on the abutting sides of the end plate and the cover plate, The flexible circuit board can be effectively protected by the barrier structure, thereby reducing the influence of the temperature of the connection operation, the connection substance used to connect the end plate and the cover plate, etc. on the performance of the flexible circuit board, and reducing the risk of damage to the flexible circuit board. Therefore, the use performance and safety performance of the battery module can be guaranteed and improved, and the production yield of the battery module can be improved.

In one embodiment, the blocking structure includes a blocking part and a shielding part connected to the side of the blocking part close to the end plate, the blocking part is blocked between the joint of the end cover and the flexible circuit board, and the shielding part is parallel to a part of the flexible circuit board, And used to cover the flexible circuit board.

By adopting the above scheme, the barrier structure can protect the flexible circuit board during the connection operation between the end plate and the cover plate by relatively blocking the barrier part between the connection part of the end cover and the flexible circuit board, so as to reduce the temperature of the connection operation, The impact of connecting substances on the flexible circuit board can reduce the risk of damage to the flexible circuit board; the barrier structure can also effectively shield the flexible circuit board by connecting to the barrier part and extending toward the end plate and parallel to the shielding part of the flexible circuit board to reduce the risk of damage to the flexible circuit board. The degree of exposure of the flexible circuit board at the signal collection port of the battery module can further protect the flexible circuit board to further reduce the risk of damage to the flexible circuit board.

In one embodiment, the side of the flexible circuit board facing the barrier structure is provided with a buffer structure.

By adopting the above scheme, the buffer structure can be effectively buffered between the body of the flexible circuit board and the barrier structure to reduce the friction between the body of the flexible circuit board and the barrier structure, thereby further protecting the flexible circuit board and further reducing the friction of the flexible circuit board. The risk of damage to the board can be guaranteed and improved, and the service life of the flexible circuit board can be extended.

In one embodiment, the end plate is welded to the cover plate; the battery module further includes a bottom plate disposed on a side of the cell pack away from the cover plate, and the bottom plate is welded to the end plate.

By adopting the above scheme, the connection between the cover plate and the end plate and between the bottom plate and the end plate can be facilitated, the connection is stable and reliable, and even the connection between the cover plate and the end plate and between the bottom plate and the end plate can be made The sealing performance is better.

In one embodiment, the end plates are glued to the cover plate.

By adopting the above scheme, the problem of relatively high welding defect rate between the die-casting end plate and the profile cover plate can be solved, and the connection between the end plate and the cover plate can be made stable and reliable, thereby improving the manufacturability of the battery module, Ease of production.

In one embodiment, the cover plate is provided with a connecting portion, and the end plate is provided with a limiting groove that fits in with the connecting portion, and the groove wall and the groove bottom of the limiting groove are bonded to the connecting portion.

By adopting the above-mentioned scheme, when connecting the cover plate and the end plate, the connecting part of the cover plate can be slid into and inserted into the limiting groove first, so as to preliminarily establish the positional relationship between the connecting part and the limiting groove, and then through the bonding glue and other substances to bond the groove wall and groove bottom of the limiting groove to the connecting part, and stabilize the positional relationship and connection relationship between the connecting part and the limiting groove, so that the bonding between the end plate and the cover plate can be realized conveniently fixed. And both the groove wall and the groove bottom of the limiting groove need to be bonded to the connecting part, so that the glue coating area between the end plate and the cover plate can be guaranteed and expanded to a certain extent, that is, the gap between the end plate and the cover plate can be guaranteed and expanded. The bonding area can make the connection between the end plate and the cover plate more stable, reliable and durable.

By adopting the above scheme, a certain cushioning effect can also be formed between the connecting part and the limiting groove through the adhesive, so that energy can be absorbed when vibration occurs, so as to ease the vibration of the cover plate, that is, form a shock absorption effect, Therefore, the service performance of the battery module can be improved, and the service life of the battery module can be prolonged.

By adopting the above scheme, even if the adhesive fails, the positional relationship and abutting relationship between the cover plate and the end plate can be stabilized based on the limit effect of the limit groove on the connection part, so that the cover plate will not come out, thereby ensuring And improve the performance of the battery module.

In one embodiment, the connecting portion is bent relative to the body of the cover plate toward or away from the battery pack, and the bending angle is ≤90°;

At least one groove wall of the limiting groove in the height direction of the battery pack is parallel to the connecting portion.

By adopting the above scheme, on the one hand, on the basis of optimizing the limiting effect of the two opposite groove walls of the limiting groove on the connection part in the height direction of the battery pack, so as to limit the cover plate from coming out when the adhesive fails, The connecting part is guided into the groove by the groove wall of the limiting groove parallel to the connecting part, so that the convenience of cooperation between the connecting part and the limiting groove can be improved correspondingly, and the assembly convenience of the battery module can be improved. On the other hand, a triangle-like, larger glue-coating space can be formed between the connecting part and the limiting groove, so that the glue-coating area between the end plate and the cover plate can be further expanded, that is, the end plate and the cover plate can be further enlarged. The bonding area between them can make the connection between the end plate and the cover plate more stable, reliable and durable, and the increase in the amount of adhesive can also help to strengthen the vibration buffering effect of the adhesive. Shock effect.

In one embodiment, it is defined that bending toward the direction away from the battery core group is positive, and bending toward the direction close to the battery core group is negative, and the angle range of the connecting part relative to the body of the cover plate is -30°～﹢ 5°.

By adopting the above scheme, the convenience of cooperation between the connecting part and the limiting groove can be improved, and at the same time, the limiting effect of the two relative groove walls of the limiting groove on the connecting part in the height direction of the battery pack can be guaranteed and improved , so as to ensure that the cover plate will not come out even when the adhesive fails, thereby improving the structural stability and reliability of the battery module, improving the performance of the battery module, and prolonging the service life of the battery module .

In one embodiment, the battery module further includes a bottom plate arranged on the side of the battery core group away from the cover plate, the bottom plate is provided with a plug-in part; The groove wall and the groove bottom of the groove are bonded to the bottom plate.

By adopting the above solution, the problem of poor welding between the die-casting end plate and the profile bottom plate can be solved, and the connection between the end plate and the bottom plate can be made stable and reliable, thereby improving the manufacturability and production convenience of the battery module.

By adopting the above scheme, the bottom plate can go deep into the insertion groove based on the insertion part, and be firmly bonded to the groove wall and the groove bottom of the insertion groove. Based on this, the glue coating area between the end plate and the bottom plate can be effectively enlarged, that is, Enlarging the bonding area between the end plate and the bottom plate can make the connection between the end plate and the bottom plate more stable, reliable and durable.

In one embodiment, the side of the insertion slot away from the cover plate leads to the outside, the slot width of the insertion slot in the height direction of the battery pack is greater than the thickness of the bottom plate, and the battery module also includes a Buffer cotton on one side and opposite to the socket.

By adopting the above solution, when the battery module is placed on the box of the battery pack, the buffer cotton can be used to ensure the flatness and flatness of the bottom surface of the battery module that is used to contact the box, thereby ensuring and improving the battery life. The contact flatness between the bottom surface of the module and the box body.

By adopting the above solution, when the battery module is placed on the box of the battery pack, buffer cotton is used to buffer between the box and the bottom plate, so as to at least achieve a shock absorption effect.

By adopting the above solution, when the battery module is placed on the box of the battery pack, based on the buffer cotton, the bottom plate can form a pressing force pointing to the end plate, so that the connection relationship and connection effect between the bottom plate and the end plate can be further stabilized. .

In one embodiment, the side of the insertion slot away from the cover plate leads to the outside, and the slot width of the insertion slot in the height direction of the battery pack is equal to the thickness of the bottom plate.

By adopting the above scheme, the bottom plate can also form a reliable connection effect with the end plate, and when the battery module is placed on the box of the battery pack, the battery module can contact the box with a large area through the bottom plate and the end plate, thereby It can balance the stress of the battery module when it is supported, and improve the state stability of the battery module to a certain extent.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the descriptions of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only of the present invention. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without paying creative efforts.

FIG. 1 is a schematic perspective view of a battery module provided in Embodiment 1 of the present invention;

Fig. 2 is the sectional view along A-A that Fig. 1 provides;

Fig. 3 is an enlarged view of area B provided in Fig. 2;

Fig. 4 is an exploded schematic diagram of the battery module provided by Embodiment 1 of the present invention;

FIG. 5 is a perspective schematic view of an insulating board provided in Embodiment 1 of the present invention;

FIG. 6 is a partial structural cross-sectional view of the battery module provided in Embodiment 2 of the present invention;

Figure 7 is an enlarged view of the region C provided in Figure 6;

Fig. 8 is a partial structural perspective view of the battery module provided by Embodiment 2 of the present invention;

FIG. 9 is a schematic perspective view of an end plate provided by Embodiment 2 of the present invention.

Wherein, each reference sign in the figure:

100-cell pack; 200-cover plate, 210-connecting part; 300-end plate, 301-limiting slot, 302-socket slot; 400-flexible circuit board, 410-buffer structure; 500-insulating plate, 510 -blocking structure, 511-blocking part, 512-shielding part; 600-bottom plate, 610-inserting part; 700-buffer cotton; 800-side plate; 900-signal collection port.

detailed description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The specific implementation of the present invention is described in more detail below in conjunction with specific embodiments:

Embodiment one

Please refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the embodiment of the present invention provides a battery module, including a cell pack 100, a cover plate 200, an end plate 300, a flexible circuit board 400 and an insulating plate 500, the cover The plate 200 is arranged on one side of the cell pack 100 in the height direction z; the end plate 300 is arranged at the end of the cell pack 100 in the length direction x, and the end plate 300 is connected to the cover plate 200, and the end plate 300 and the cover The connection of the plate 200 is the connection of the end cover; the flexible circuit board 400 is arranged between the cover plate 200 and the cell pack 100, and/or between the end plate 300 and the cell pack 100; the insulating plate 500 is connected to the end plate The insulating plate 500 is provided with a blocking structure 510 opposite to the flexible circuit board 400 , and the blocking structure 510 is blocked between the joint of the end cap and the flexible circuit board 400 .

It should be noted here that the cover plate 200 can be protected on one side of the cell pack 100 in the height direction z, and the end plate 300 can be protected on the end of the cell pack 100 in the length direction x. Based on this, It can be beneficial to ensure the performance and service life of the battery pack 100 . In addition, the cover plate 200 and the end plate 300 can also standardize and compact the structure of the battery module to a certain extent.

The battery module may additionally include a bottom plate 600 disposed on the side of the cell pack 100 facing away from the cover plate 200 , and two side plates 800 respectively disposed on opposite sides of the cover plate 200 in the thickness direction y of the cell pack 100 , Based on this, a relatively closed protective cavity can be formed by the cover plate 200, the bottom plate 600, the two end plates 300 and the two side plates 800, so as to protect the battery pack 100 in the protective cavity relatively comprehensively, and facilitate further ordering. Minimize and compact the structure of the battery module. Optionally, the two side plates 800 and the bottom plate 600 can be integrally formed and integrally connected, so as to improve the convenience of assembling the battery module to a certain extent.

Of course, in other possible implementations, the battery module can also omit the bottom plate 600, so that when forming a battery pack, the battery pack 100 can be directly contacted with the liquid cold plate for heat exchange, thereby improving the stability of the battery module. heat radiation.

In other possible implementations, the battery module can also omit one of the side plates 800, so as to compress the size of the battery module in the thickness direction y of the battery pack 100, thereby improving the battery pack using the battery module. The space utilization rate and volume grouping rate in the direction improve the energy density of the battery pack using the battery module.

It should also be noted here that the insulating plate 500 is connected to the side of the end plate 300 facing the cell pack 100, and the insulating plate 500 can be insulated between the end plate 300 and the cell pack 100 to improve the safety of the battery module. sex.

The flexible circuit board 400 is arranged on the cover plate 200, and/or in the space enclosed between the end plate 300 and the battery pack 100, and the flexible circuit board 400 can be electrically connected to each battery cell unit of the battery pack 100 to collect The voltage signal and temperature signal of each battery unit of the battery pack 100 facilitates the control of the use state of the battery module, and improves the use performance and safety performance of the battery module.

Wherein, the end plate 300 needs to be connected with the cover plate 200, specifically, the side of the end plate 300 close to the cover plate 200 first abuts against the side of the cover plate 200 close to the end plate 300 (the abutting side constitutes the joint of the end cover) Then fix the connection by welding or bonding. Therefore, in order to prevent the connecting operation of the end plate 300 and the cover plate 200 from affecting or even causing damage to the flexible circuit board 400, in this embodiment, the insulating plate 500 is integrally connected with a barrier structure 510 opposite to the flexible circuit board 400. 510 can remain isolated between the connection of the end cap and the flexible circuit board 400 after the insulation board 500 is assembled. In this way, when the end plate 300 and the cover plate 200 are connected, the barrier structure 510 between the joint of the end cover and the flexible circuit board 400 can effectively protect the flexible circuit board 400, thereby effectively reducing the pressure of the end plate 300. The influence and damage degree of the flexible circuit board 400 caused by the connection operation with the cover plate 200 .

For example, assuming that the end plate 300 and the abutting side of the cover plate 200 are connected by welding, then, during the welding operation, the barrier structure 510 can effectively reduce or even block the influence of the high temperature during the welding operation on the flexible circuit board 400, thereby enabling The risk of damage to the flexible circuit board 400 is reduced.

As another example, assuming that the abutting sides of the end plate 300 and the cover plate 200 are bonded by adhesive glue, then, during the bonding operation, the blocking structure 510 can block the flow of the adhesive glue during the bonding operation to the flexible circuit. board 400, thereby reducing the impact on the performance of the flexible circuit board 400 and reducing the risk of damage to the flexible circuit board 400.

Wherein, the barrier structure 510 can abut against the cover plate 200 and the end plate 300 , so that the structure of the battery module can be compacted. Alternatively, the barrier structure 510 can be provided with a gap between the cover plate 200 and the end plate 300 , so that the friction between the barrier structure 510 and the cover plate 200 or the end plate 300 can be reduced.

Wherein, the barrier structure 510 is integrally formed with the insulating plate 500, and the barrier structure 510 is also electrically insulated between the cover plate 200 and the flexible circuit board 400 and between the end plate 300 and the flexible circuit board 400, thereby ensuring and improving the reliability of the battery module. Use security.

To sum up, by adopting the above scheme, the barrier structure 510 integrally connected to the insulating plate 500 can be blocked between the joint of the end cover and the flexible circuit board 400. When performing connection operations such as welding on the side, the flexible circuit board 400 can be effectively protected by the barrier structure 510, thereby reducing the temperature of the connection operation, and the influence of the connection material used to connect the end plate 300 and the cover plate 200 on the performance of the flexible circuit board 400. The risk of damage to the flexible circuit board 400 can be reduced. Therefore, the use performance and safety performance of the battery module can be guaranteed and improved, and the production yield of the battery module can be improved.

Please refer to FIG. 3, FIG. 4, and FIG. 5. In this embodiment, the barrier structure 510 includes a barrier part 511 and a shielding part 512 connected to the side of the barrier part 511 close to the end plate 300. The barrier part 511 is blocked at the joint of the end cover. Between the flexible circuit board 400 , the shielding portion 512 is parallel to a part of the flexible circuit board 400 and is used to shield the flexible circuit board 400 .

By adopting the above solution, the barrier structure 510 can protect the flexible circuit board 400 during the connection operation between the end plate 300 and the cover plate 200 by relatively blocking the barrier part 511 between the connection part of the end cover and the flexible circuit board 400, so as to Reduce the influence of the temperature of the connection operation, the connection substance, etc. on the flexible circuit board 400, and reduce the risk of damage to the flexible circuit board 400; The shielding part 512 effectively shields the flexible circuit board 400 to reduce the degree of exposure of the flexible circuit board 400 at the signal collection port 900 of the battery module, thereby further protecting the flexible circuit board 400 and further reducing the possibility of damage to the flexible circuit board 400 risk.

Please refer to FIG. 2, FIG. 3, and FIG. 4. In this embodiment, the side of the flexible circuit board 400 facing the barrier structure 510 is provided with a buffer structure 410, and the buffer structure 410 is buffered between the body of the flexible circuit board 400 and the barrier structure 510. between.

Therefore, by adopting the above scheme, the buffer structure 410 can be effectively buffered between the body of the flexible circuit board 400 and the barrier structure 510 to reduce the friction between the body of the flexible circuit board 400 and the barrier structure 510, thereby further protecting the flexible circuit. The board 400 can further reduce the risk of damage to the flexible circuit board 400 , thereby ensuring and improving the performance of the flexible circuit board 400 and prolonging the service life of the flexible circuit board 400 .

Optionally, the buffer structure 410 is foam. Such arrangement can make the cushioning structure 410 have a certain degree of elasticity, good cushioning performance, light weight, and fast pressure-sensitive fixation.

Please refer to FIG. 3 , in this embodiment, the end plate 300 is welded to the cover plate 200 .

By adopting the above solution, the connection between the end plate 300 and the cover plate 200 can be made convenient, stable and reliable, and even the connection between the end plate 300 and the cover plate 200 can be better sealed.

Please refer to FIG. 2 , in this embodiment, the battery module further includes a bottom plate 600 disposed on a side of the cell pack 100 away from the cover plate 200 , and the bottom plate 600 is welded to the end plate 300 .

By adopting the above solution, the connection between the end plate 300 and the bottom plate 600 can be facilitated, stable and reliable, and even the connection between the end plate 300 and the bottom plate 600 can be better sealed.

Embodiment two

The difference between this embodiment and Embodiment 1 is:

Please refer to FIG. 6 , in this embodiment, the end plate 300 is glued to the cover plate 200 .

It should be noted here that, when the end plate 300 is a die-casting part and the cover plate 200 is a profiled part, the defective rate of welding between the end plate 300 and the cover plate 200 is relatively high, and bursting is prone to occur.

In this regard, this embodiment makes the end plate 300 and the cover plate 200 bonded. Based on this, the problem of relatively high welding defect rate between the die-casting end plate 300 and the profile cover plate 200 can be solved, and the end plate 300 and the cover plate The connection between the boards 200 is stable and reliable, thereby improving the manufacturability and production convenience of the battery module.

Please refer to Fig. 6, Fig. 7, and Fig. 8. In this embodiment, the cover plate 200 is provided with a connecting portion 210, and the end plate 300 is provided with a limiting groove 301 which is plugged and fitted with the connecting portion 210. The groove of the limiting groove 301 The wall and the groove bottom are glued to the connection part 210 .

What needs to be explained here is that, please refer to FIG. 9 together, the limiting groove 301 is along the cell pack 100 (the cell pack 100 is omitted in the illustrations of Embodiment 2, but according to the above and referring to FIG. 2 , it can be Understandably, the cell pack 100 is placed in the space enclosed by the cover plate 200, the bottom plate 600, the side plate 800 and the end plate 300) to extend in the thickness direction y, and the limiting groove 301 is provided through the extension direction, based on In this way, the convenience of cooperation between the connecting portion 210 and the limiting groove 301 can be improved.

Therefore, by adopting the above scheme, when connecting the cover plate 200 and the end plate 300, the connecting portion 210 of the cover plate 200 can be slid into and inserted into the limiting groove 301 to initially establish a gap between the connecting portion 210 and the limiting groove 301. The positional relationship between the positional relationship, and then the groove wall and the groove bottom of the limiting groove 301 are bonded to the connecting part 210 through materials such as adhesive glue, so as to stabilize the positional relationship and connection relationship between the connecting part 210 and the limiting groove 301, so that The adhesive fixing between the end plate 300 and the cover plate 200 is conveniently realized. And the groove wall and the groove bottom of the limit groove 301 need to be bonded with the connecting portion 210, so as to ensure and expand the glue coating area between the end plate 300 and the cover plate 200 to a certain extent, that is, ensure and expand the area of the end plate 300. The bonding area between the end plate 300 and the cover plate 200 can make the connection between the end plate 300 and the cover plate 200 more stable, reliable and durable.

The adhesive has a certain modulus of elasticity. Therefore, by adopting the above scheme, a certain buffering effect can also be formed between the connecting part 210 and the limiting groove 301 through the adhesive, so that energy can be absorbed when vibration occurs. In order to alleviate the vibration of the cover plate 200, that is to form a shock absorption effect, thereby improving the performance of the battery module and prolonging the service life of the battery module.

The limiting groove 301 can also form a certain limiting effect on the connecting portion 210. Therefore, by adopting the above scheme, even if the adhesive fails (when the stress exceeds the interface strength and interface adhesion of the adhesive, the adhesive will may fail), or based on the limiting effect of the limiting groove 301 on the connecting part 210, the positional relationship and abutting relationship between the cover plate 200 and the end plate 300 can be stabilized, so that the cover plate 200 will not come out, thereby ensuring and improving The performance of the battery module.

Of course, when the side plates 800 are provided on both sides of the cover plate 200, the two side plates 800 on the opposite sides of the cover plate 200 can also form a certain limit effect on the cover plate 200, thereby further restricting the cover plate 200 from coming out. The structural stability and reliability of the battery module can be improved.

Please refer to FIG. 7 and FIG. 8 , in this embodiment, the connecting portion 210 is bent relative to the body of the cover plate 200 toward the direction w close to the battery pack 100 or the direction z away from the battery pack 100 , and the bending angle α≤90°; at least one groove wall of the limit groove 301 in the height direction z of the battery pack 100 is parallel to the connecting portion 210, that is, the two opposing grooves of the limit groove 301 in the height direction z of the battery pack 100 At least one of the walls is parallel to the connection part 210 .

For example, in FIG. 7 , the connecting portion 210 is bent relative to the body of the cover plate 200 toward the direction w close to the cell pack 100 , and the limiting groove 301 is in two opposite groove walls in the height direction z of the cell pack 100 , the groove wall of the limiting groove 301 that is relatively far away from the battery pack 100 is parallel to the board surface of the connecting portion 210 .

Therefore, by adopting the above-mentioned solution, on the one hand, it is possible to optimize the limiting effect of the two opposite groove walls of the limiting groove 301 on the connecting portion 210 in the height direction z of the cell pack 100, so as to limit the effect of the cover plate 200 on the adhesive glue. On the basis of disengagement at the time of failure, the connecting part 210 is guided into the groove through the groove wall of the limiting groove 301 parallel to the connecting part 210, so that the convenience of cooperation between the connecting part 210 and the limiting groove 301 can be improved accordingly, and the battery life can be improved. Easy assembly of modules. On the other hand, a triangle-like, relatively large glue-coating space can be formed between the connecting portion 210 and the limiting groove 301, so that the glue-coating area between the end plate 300 and the cover plate 200 can be further enlarged, that is, the end plate 300 can be further enlarged. The bonding area between the end plate 300 and the cover plate 200 can make the connection between the end plate 300 and the cover plate 200 more stable, more reliable, and more durable, and the increase in the amount of adhesive can also help strengthen the bonding. The vibration buffering effect of the glue is the shock absorption effect.

Please refer to FIG. 7 and FIG. 8. In this embodiment, it is defined that bending toward the direction z away from the battery pack 100 is positive, and bending toward the direction w close to the battery pack 100 is negative. The connection part 210 is relatively opposite to the cover plate. The bending angle α of the body of the 200 ranges from -30° to +5°.

That is, when the connecting portion 210 is bent toward the direction w close to the cell pack 100 relative to the body of the cover plate 200 , the angle α of the connecting portion 210 bent ≤ 30°; When the main body is bent toward the direction z away from the cell pack 100 , the angle α of the connecting portion 210 bent is ≤5°.

By adopting the above scheme, the convenience of cooperation between the connecting portion 210 and the limiting groove 301 can be improved, and at the same time, the connection between the two relative groove walls of the limiting groove 301 in the height direction z of the battery pack 100 can be guaranteed and improved. The limiting effect of the part 210 ensures that the cover plate 200 will not come out even when the adhesive fails, thereby improving the structural stability and reliability of the battery module, and improving the performance of the battery module. Extend the service life of the battery module.

Please refer to FIG. 6, FIG. 8, and FIG. 9. In this embodiment, the battery module further includes a bottom plate 600 disposed on the side of the cell pack 100 away from the cover plate 200, and the bottom plate 600 is provided with an insertion portion 610; 300 is provided with an insertion groove 302 extending along the thickness direction y of the cell pack 100 and mated with the insertion portion 610 , the groove wall and groove bottom of the insertion groove 302 are bonded to the bottom plate 600 .

It should be noted here that when the end plate 300 is a die-casting part and the bottom plate 600 is a profile part, there may be poor welding and bursting between the end plate 300 and the bottom plate 600 .

In this regard, this embodiment makes the end plate 300 and the bottom plate 600 bonded. Based on this, the problem of poor welding between the die-casting end plate 300 and the profile bottom plate 600 can be solved, and the connection between the end plate 300 and the bottom plate 600 is stable and reliable. , so that the manufacturability and production convenience of the battery module can be improved.

By adopting the above scheme, the bottom plate 600 can penetrate into the insertion groove 302 based on the insertion part 610, and be firmly bonded to the groove wall and the groove bottom of the insertion groove 302. Based on this, the gap between the end plate 300 and the bottom plate 600 can be effectively enlarged. The glue coating area, that is, enlarge the bonding area between the end plate 300 and the bottom plate 600, so that the connection between the end plate 300 and the bottom plate 600 can be made more stable, reliable and durable.

Please refer to FIG. 6, FIG. 8, and FIG. 9. In this embodiment, the side of the insertion groove 302 away from the cover plate 200 leads to the outside (that is, the side of the insertion groove 302 away from the cover plate 200 has no groove wall). The slot width of the insertion slot 302 in the height direction z of the cell pack 100 is greater than the thickness of the bottom plate 600 , and the battery module also includes a buffer attached to the side of the bottom plate 600 away from the end plate 300 and opposite to the insertion slot 302 The cotton 700 and the buffer cotton 700 protrude from the bottom surface of the end plate 300 facing away from the cover plate 200 when it is not compressed.

It should be noted here that the buffer cotton 700 protrudes from the bottom surface of the end plate 300 away from the cover plate 200 when it is not compressed, and when the battery module is placed on the box of the battery pack, the buffer cotton 700 can Under force, it is compressed to be flat with the bottom surface of the end plate 300 facing away from the cover plate 200 .

Therefore, by adopting the above solution, when the battery module is placed on the box of the battery pack, the buffer cotton 700 can be used to ensure the flatness and flatness of the bottom surface of the battery module that is in contact with the box, thereby ensuring And improve the contact flatness between the bottom surface of the battery module and the box body.

By adopting the above solution, when the battery module is placed on the box of the battery pack, the buffer cotton 700 is buffered between the box and the bottom plate 600 to at least achieve a shock absorption effect.

By adopting the above solution, when the battery module is placed on the box body of the battery pack, the buffer cotton 700 can form a pressing force on the bottom plate 600 pointing to the end plate 300, so that the connection between the bottom plate 600 and the end plate 300 can be further stabilized. The connection relationship and connection effect can reduce the risk of movement of the bottom plate 600, thereby improving the structural stability and reliability of the battery module, improving the performance of the battery module, and prolonging the service life of the battery module.

Of course, in other possible implementations, the side of the insertion slot 302 away from the cover plate 200 is still open to the outside, but the slot width of the insertion slot 302 in the height direction z of the battery pack 100 may be equal to that of the bottom plate 600 thickness.

Optionally, the above buffer cotton 700 is foam. Such setting can make the cushioning cotton 700 have certain elasticity, good cushioning performance, light weight, and fast pressure-sensitive fixation.

Based on this embodiment, the bottom plate 600 can also form a reliable connection effect with the end plate 300, and when the battery module is placed on the box body of the battery pack, the battery module can be connected to the box body through the bottom plate 600 and the end plate 300. The contact area can balance the stress of the battery module when it is supported, and improve the state stability of the battery module to a certain extent.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. A battery module, comprising: battery pack; The cover plate is arranged on one side of the cell group in the height direction; An end plate, located at the end of the cell group in the length direction, the end plate is connected to the cover plate, and the connection between the end plate and the cover plate is the end cover connection; A flexible circuit board is arranged between the cover plate and the battery pack, and/or, between the end plate and the battery pack; An insulating plate, connected to the side of the end plate facing the battery pack, the insulating plate is provided with a blocking structure opposite to the flexible circuit board, and the blocking structure blocks the connection between the end cover and the between the flexible circuit boards. 2. The battery module according to claim 1, wherein the blocking structure comprises a blocking portion and a shielding portion connected to the blocking portion near the end plate, the blocking portion is blocked from the Between the joint of the end cover and the flexible circuit board, the shielding portion is parallel to a part of the flexible circuit board and is used to shield the flexible circuit board. 3. The battery module according to claim 1, wherein a buffer structure is provided on a side of the flexible circuit board facing the barrier structure. 4. The battery module according to any one of claims 1-3, wherein the end plate is welded to the cover plate. 5. The battery module according to any one of claims 1-3, wherein the end plate is bonded to the cover plate. 6. The battery module according to claim 5, wherein the cover plate is provided with a connecting portion, and the end plate is provided with a limiting groove that is plugged and fitted with the connecting portion, and the limiting groove The groove wall and the bottom of the groove are bonded to the connecting portion. 7 . The battery module according to claim 6 , wherein the connecting portion is bent toward or away from the battery pack with respect to the body of the cover plate, and the bending angle is ≤90° °; At least one groove wall of the limiting groove in the height direction of the cell pack is parallel to the connecting portion. 8 . The battery module according to claim 7 , wherein it is defined that bending toward a direction away from the battery pack is positive, and bending toward a direction close to the battery pack is negative, and the connecting portion The range of the bending angle relative to the body of the cover plate is -30°～+5°. 9. The battery module according to any one of claims 1-3, wherein the battery module further comprises a bottom plate arranged on a side of the battery pack away from the cover plate, the The bottom plate is provided with an insertion portion; the end plate is provided with an insertion groove that fits with the insertion portion, and the groove wall and the groove bottom of the insertion groove are bonded to the bottom plate. 10. The battery module according to claim 9, wherein the side of the insertion slot away from the cover plate leads to the outside, and the insertion slot is in the height direction of the battery pack The width of the slot is greater than the thickness of the bottom plate, and the battery module further includes buffer cotton arranged on the side of the bottom plate away from the end plate and opposite to the insertion slot.

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