Battery module and battery pack

Abstract

The battery module comprises a battery cell group and an upper cover, the battery cell group comprises a plurality of battery cells arranged along a first direction, pole columns of the battery cells are positioned on the end surfaces of the battery cells in a second direction, the upper cover is an insulating part and is arranged at the end parts of the battery cells in the second direction, the upper cover comprises a cover body and a side edge plate, and the side edge plate is arranged on the cover body. The cover body and the battery cell are arranged in the second direction, the side plate is arranged at one end of the cover body in the third direction and extends towards the direction close to the battery cell, at least part of the side plate is opposite to the side face of the battery cell in the third direction, and a supporting strip is arranged on the side face, facing the battery cell, of the side plate; and at least part of the supporting strip is positioned between the two adjacent battery cells and is propped against the two battery cells positioned on the two opposite sides of the supporting strip. According to the battery module disclosed by the utility model, a tool or filler for limiting the distance between two adjacent battery cells can be omitted, so that the assembly efficiency of the battery module can be better improved, and the assembly cost of the battery module can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially is related to a battery module and battery package. BACKGROUND

[0002] The utilization of new energy battery significantly reduces greenhouse gas and harmful pollutant emissions, and the battery module is the main component of the new energy battery package. In the process of stacking the module battery cell, the distance between adjacent battery cells needs to be controlled to ensure that the overall size is within the tolerance range, and at the same time, the expansion space for the battery cell circulation process can be reserved. However, in the related technology, when the module battery cell is stacked, the gap between adjacent battery cells is ensured by a tool clamp, or a certain thickness of filler is pasted between the battery cells, which results in an increase in the module assembly process and high assembly cost. SUMMARY

[0003] The utility model discloses a battery module in the first aspect, it has the advantages such as high assembly efficiency and low assembly cost.

[0004] According to the battery module of the utility model first aspect embodiment, including: the cell group, including the multiple battery cell along the first direction arrangement, the pole of the battery cell is located the end face of the battery cell in the second direction, the second direction is perpendicular to the first direction;Upper cover, the upper cover is insulating piece and is located the end of the battery cell in the second direction, the upper cover includes cover body and side plate, the cover body is arranged along the second direction with the battery cell, the side plate is located the one end of the cover body in the third direction and extends towards the direction close to the battery cell, the third direction is perpendicular to the first direction and the second direction, at least part of the side plate is oppositely arranged with the side of the battery cell in the third direction, the side plate is equipped with support strip towards the side of the battery cell, at least part of the support strip is located between two adjacent battery cells and is in contact with two battery cells located on the opposite sides of the support strip.

[0005] According to the battery module of the utility model first aspect embodiment, by setting support strip on the upper cover, in the assembly process of the battery module, through the installation upper cover, the function of insulation protection and keeping the distance between two adjacent battery cells can be realized at the same time, the tool or filler for limiting the distance between two adjacent battery cells can be saved, so that the assembly efficiency of the battery module can be improved and the assembly cost of the battery module can be reduced, and the support strip can be stably clamped by two adjacent battery cells to increase the friction between the support strip and the battery cell, so that the support strip can be prevented from being pulled out of the gap between two adjacent battery cells, so that the firm installation of the upper cover can be ensured.

[0006] According to some embodiments of the utility model, the part of the support strip inserted between two adjacent battery cells is a support part, and the length L1 of the support part in the third direction and the size L2 of the battery cell in the third direction satisfy: L1 / L2≥50%.

[0007] According to some embodiments of the utility model, in the third direction, the length L3 of the support strip, the distance L4 between the side of the battery cell facing away from the side plate and the side plate satisfy: L3≤L4.

[0008] According to some embodiments of the utility model, the support strips are arranged in the first direction at intervals, and a set gap is defined between any two adjacent battery cells, and the number of the support strips is the same as and corresponds to the number of the set gaps.

[0009] According to some embodiments of the utility model, the connecting position of the support strip and the side plate is chamfered; and / or, the cover body is further provided with side edge bends extending towards the direction close to the battery cell at both ends in the first direction, and the battery cell group is located between the side edge bends on both sides.

[0010] According to some embodiments of the utility model, the cover body is reversible relative to the side plate; and / or, the upper cover is a plastic part.

[0011] According to some embodiments of the utility model, the battery module further comprises a busbar, the busbar is connected to the end of the battery cell in the second direction, the cover body is located on the side of the busbar facing away from the battery cell, the support strips are arranged at intervals along the second direction with the cover body, and the support strips are located on the side of the busbar facing away from the cover body.

[0012] According to some embodiments of the utility model, further comprising a busbar support and an output pole protection base, the busbar support is connected with the busbar and fixed on the output pole protection base, the output pole protection base is arranged on the side surface of the battery cell group in the first direction, and the upper cover further comprises an outer extension shielding plate, the outer extension shielding plate is arranged on one end of the cover body close to the output pole protection base in the first direction, and the outer extension shielding plate and the part of the busbar support arranged on the output pole protection base are arranged opposite to each other along the second direction.

[0013] According to some embodiments of the utility model, one end of the cover body close to the outer extension shielding plate is provided with a side edge bend, the side edge bend extends towards the direction close to the battery cell and is arranged along the second direction with the outer extension shielding plate, a crack stopping groove is formed on the cover body between the outer extension shielding plate and the side edge bend; and / or, the outer extension shielding plate and the busbar support are connected by adhesive.

[0014] The utility model discloses a second aspect proposes a kind of battery pack.

[0015] According to the battery pack of the second aspect embodiment of the utility model, including: above-mentioned battery module.

[0016] According to the battery pack of the second aspect embodiment of the utility model, by being provided with support strip on upper cover, in the assembly process of battery module, by installing upper cover can simultaneously realize the function of insulating protection and keeping the spacing between adjacent two electric cores, can dispense with the tooling or filler for limiting the spacing between adjacent two electric cores, so as to can better improve the assembly efficiency of battery module and reduce the assembly cost of battery module, and, by adjacent two electric cores can stably clamp support strip to increase the friction between support strip and electric core, so as to can avoid support strip from the clearance between adjacent two electric cores and get out, so as to can guarantee the firm installation of upper cover.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the partial explosion chart of battery module according to the utility model embodiment;

[0019] Figure 2 It is the axial side view of the partial structure of battery module according to the utility model embodiment;

[0020] Figure 3 It is the side view of the partial structure of battery module according to the utility model embodiment;

[0021] Figure 4 It is Figure 3 The enlarged view of area A in;

[0022] Figure 5 It is the plan view of the partial structure of battery module according to the utility model embodiment;

[0023] Figure 6 It is Figure 5 The enlarged view of area B in;

[0024] Figure 7 It is the schematic diagram of the upper cover of battery module according to the utility model embodiment;

[0025] Figure 8 It is the schematic diagram of another angle of the upper cover of battery module according to the utility model embodiment.

[0026] Reference signs:

[0027] 100. The battery module;

[0028] 1. The battery cell group; 11. The battery cell; 2. The upper cover; 21. The cover body; 211. The crack stopping groove; 22. The side plate; 23. The support strip; 24. The side bending; 25. The outer extension shielding plate; 26. The positive and negative electrode identification; 3. The busbar; 4. The busbar support; 5. The output pole protection base; 6. The double-sided adhesive tape; 7. The mica paper; e1. The first direction; e2. The second direction; e3. The third direction. DETAILED DESCRIPTION

[0029] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like reference numerals identify similar elements or features throughout the figures. The embodiments described below are exemplary and intended to provide an explanation of the application, but are not intended to limit the application. For purposes of clarity, the description is divided into sections, but the sections are not meant to limit the application. The description is further divided into subsections, but the subsections are not meant to limit the application.

[0030] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For purposes of simplicity and clarity, the description is divided into sections. Of course, it is to be understood that the same or equivalent features can be used in different embodiments and / or examples suggested herein, and that the description is intended to cover all possible implementations of the application. In addition, various specific examples of processes and materials are provided in the description below, but it is understood that other processes and / or materials can be employed without departing from the scope of the application. Furthermore, the present application provides examples of various specific processes and materials, but one skilled in the art can recognize that other processes can be applicable and / or other materials can be used.

[0031] A battery module 100 according to the first embodiment of the present application is described below with reference to the attached drawings.

[0032] As Figures 1 to 4As shown, according to the battery module 100 of the first aspect of the utility model embodiment, including: the electric core group 1 and the upper cover 2, the electric core group 1 includes multiple electric cores 11 arranged along the first direction e1, the pole of the electric core 11 is located on the end face of the electric core 11 in the second direction e2, the second direction e2 is perpendicular to the first direction e1, the upper cover 2 is an insulating part and is arranged at the end of the electric core 11 in the second direction e2, the upper cover 2 includes cover body 21 and side plate 22, the cover body 21 is arranged along the second direction e2 with the electric core 11, the side plate 22 is arranged at one end of the cover body 21 in the third direction e3 and extends towards the direction close to the electric core 11, the third direction e3 is perpendicular to the first direction e1 and the second direction e2, at least part of the side plate 22 is arranged opposite to the side face of the electric core 11 in the third direction e3, the side plate 22 is provided with support strip 23 on the side face of the electric core 11, and at least part of the support strip 23 is located between the adjacent two electric cores 11 and abuts against the two electric cores 11 located on the opposite sides of the support strip 23.

[0033] That is, the support strip 23 can be better supported between the adjacent two electric cores 11, so that the distance between the adjacent two electric cores 11 can be better maintained by the support strip 23, and the production tolerance can be adjusted by the gap between the adjacent two electric cores 11, and the deformation space for the expansion of the electric core 11 can be provided. At the same time, it can be understood that, since the upper cover 2 is an insulating part, the upper cover 2 can play a good insulation protection effect at the end of the electric core group 1. In other words, the upper cover 2 has the functions of maintaining the distance between the adjacent two electric cores 11 and keeping the safety gap between the adjacent two electric cores 11, that is, the functions of maintaining the distance between the adjacent two electric cores 11 and keeping the safety gap between the adjacent two electric cores 11 are integrated on the upper cover 2.

[0034] Therefore, by arranging the support strip 23 on the upper cover 2, during the assembly of the battery module 100, the functions of insulation protection and maintaining the distance between the adjacent two electric cores 11 can be realized at the same time by installing the upper cover 2, and the tooling or filler for limiting the distance between the adjacent two electric cores 11 can be omitted, so that the assembly efficiency of the battery module 100 can be improved and the assembly cost of the battery module 100 can be reduced. Moreover, the adjacent two electric cores 11 can stably clamp the support strip 23 to increase the friction between the support strip 23 and the electric core 11, so that the support strip 23 can be prevented from being pulled out of the gap between the adjacent two electric cores 11, thereby ensuring the firm installation of the upper cover 2.

[0035] Further, since the side plate 22 extends from the end of the cover body 21 away from the battery cell 11 towards the direction of the battery cell 11, the end of the side plate 22 is opposite to the side surface of the battery cell 11 in the second direction e2, so that the gap between the battery cell 11 and the cover body 21 can be shielded from one side in the second direction e2 by the side plate 22, so that the dust and the like from the outside can be prevented from entering the gap between the battery cell 11 and the cover body 21, so as to improve the protection effect of the upper cover 2 on the battery cell group 1.

[0036] According to the battery module 100 of the first aspect of the present application, by arranging the support strip 23 on the upper cover 2, during the assembly of the battery module 100, the functions of insulation protection and spacing between the adjacent two battery cells 11 can be realized at the same time by installing the upper cover 2, so that the tooling or filler for limiting the spacing between the adjacent two battery cells 11 can be omitted, so as to improve the assembly efficiency of the battery module 100 and reduce the assembly cost of the battery module 100, and further, the support strip 23 can be stably clamped by the adjacent two battery cells 11 to increase the friction between the support strip 23 and the battery cell 11, so as to prevent the support strip 23 from being pulled out of the gap between the adjacent two battery cells 11, so as to ensure the firm installation of the upper cover 2.

[0037] In some embodiments, as shown in Figure 7 The surface of the side plate 22 away from the battery cell 11 is provided with positive and negative electrode marks 26, such as positive electrode mark plus or negative electrode mark minus, so that the placement direction of the battery cell 11 can be determined by the positive and negative electrode marks to prevent the battery cell 11 from being installed in reverse. The positive and negative electrode marks 26 can be arranged on the side plate 22 by silk printing.

[0038] According to some embodiments of the present application, as shown in Figure 4 The part of the support strip 23 inserted between the adjacent two battery cells 11 is a support part, and the length L1 of the support part in the third direction e3 and the size L2 of the battery cell 11 in the third direction e3 satisfy: L1 / L2≥50%. That is, the part of the support strip 23 supported between the adjacent two battery cells 11 in the third direction e3 is not less than half of the width size of the battery cell 11 in the third direction e3. It can be understood that the larger the ratio of L1 and L2, the longer the size covered by L1 in the third direction e3, and a more stable support effect can be provided. Thus, the support effect of the support strip 23 between the adjacent two battery cells 11 can be improved to more stably maintain the spacing between the adjacent two battery cells 11. The ratio of L1 and L2 can be 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 100%, etc.

[0039] According to some embodiments of the present application, as shown in Figure 4As shown, in the third direction e3, the length L3 of the support strip 23, the distance L4 between the side of the cell 11 away from the side plate 22 and the side plate 22 satisfy: L3≤L4. That is, the end of the support strip 23 away from the side plate 22 in the third direction e3 does not exceed the side of the cell 11 away from the side plate 22 in the third direction e3. For example, the length of the support strip 23 in the third direction e3 is flush with the side of the cell 11 away from the side plate 22; or, the length of the support strip 23 in the third direction e3 is less than the distance between the side of the cell 11 away from the side plate 22 and the side plate 22, that is, the end of the support strip 23 away from the side plate 22 in the third direction e3 is located on the side of the side of the cell 11 away from the side plate 22 towards the side plate 22. In this way, interference can be avoided between the end of the support strip 23 away from the side plate 22 in the third direction e3 and the side of the cell 11 away from the side plate 22.

[0040] According to some embodiments of the present application, Figures 5 to 8 As shown, the support strip 23 is provided with a plurality of intervals arranged along the first direction e1, and a set gap is defined between any two adjacent cells 11, and the number of the plurality of support strips 23 is the same as and corresponds to the number of the plurality of set gaps. That is, any two adjacent cells 11 correspond to a support strip 23, so that the plurality of support strips 23 can better maintain the distance between any two adjacent cells 11.

[0041] According to some embodiments of the present application, the connection position of the support strip 23 and the side plate 22 is chamfered. In this way, the connection area between the end of the support strip 23 close to the side plate 22 and the side plate 22 can be better increased, and at the same time, the connection position of the support strip 23 and the side plate 22 can be avoided from cracking, so as to improve the stability of the connection between the support strip 23 and the side plate 22, and further improve the stability of the support strip 23 supported between the two adjacent cells 11. In addition, the chamfering can better avoid the interference with the cells 11 on both sides.

[0042] According to some embodiments of the present application, the cover body 21 is further provided with a side edge bending 24 extending towards the direction close to the cell 11 at both ends in the first direction e1, and the cell group 1 is located between the side edge bendings 24 on both sides. In this way, the side edge bendings 24 on both sides can better shield the gap between the cover body 21 and the cell 11 from the opposite sides of the cell group 1, so as to improve the effective object blocking, so as to prevent the external dust and the like from entering the gap between the cell 11 and the cover body 21, thereby improving the protection effect of the upper cover 2 on the cell group 1.

[0043] According to some embodiments of the utility model, the connecting position of support strip 23 and side plate 22 is chamfered, the both ends of cover body 21 in first direction e1 are further provided with side edge bending 24 extending towards the direction close to battery cell 11, and battery cell group 1 is located between two side edge bendings 24. Therefore, the connecting position of support strip 23 and side plate 22 can be prevented from cracking, and the protection effect of upper cover 2 on battery cell group 1 can be improved.

[0044] According to some embodiments of the utility model, cover body 21 can be flipped relative to side plate 22. It can be understood that after the distance between two adjacent battery cells 11 is kept by support strip 23, welding of busbar 3 and other structures is needed, busbar 3 needs to be welded with the pole of battery cell 11, that is, busbar 3 is located between cover body 21 and battery cell 11, therefore, folding cover body 21 towards the direction close to side plate 22 can provide more operation space for the installation of busbar 3 and other structures, at this time, the position relationship between side plate 22 and battery cell 11 does not change, so that support strip 23 can provide stable support effect. That is, the distance between any two adjacent battery cells 11 can be controlled, and busbar 3 and other structures can be installed between battery cell 11 and cover body 21, so that the assembly difficulty of battery module 100 can be reduced to improve the assembly efficiency.

[0045] According to some embodiments of the utility model, upper cover 2 is a plastic part. Specifically, upper cover 2 can be formed by bending and processing plastic sheet, and side plate 22 can be formed by bending one end of plastic sheet towards the direction close to battery cell 11. Since the thickness of plastic sheet is small, such as 0.25mm in a specific embodiment, although plastic material has a certain rigidity, the small thickness can cause a certain degree of deformation, so that cover body 21 can be opened for the installation of busbar 3.

[0046] In a specific example, upper cover 2 is an integral part, so that the reliability of the connection between each part of upper cover 2 can be ensured, and the connection process between each part of upper cover 2 can be omitted, so that the production efficiency is high.

[0047] According to some embodiments of the utility model, as Figure 1 and Figure 6As shown, the battery module 100 further comprises a busbar 3 connected at the end of the battery cell 11 in the second direction e2, the cover body 21 is located on the side of the busbar 3 away from the battery cell 11, and the support strip 23 is arranged in the second direction e2 away from the cover body 21. The busbar 3 is located on the side away from the cover body 21. Therefore, the support strip 23 and the busbar 3 can be better avoided from interfering with each other, and the gap between the support strip 23 and the cover body 21 in the second direction e2 can be used as a mounting space for the busbar 3, so as to ensure the support effect of the support strip 23 while ensuring the unobstructed installation of the busbar 3.

[0048] In some embodiments, the side of the cover body 21 away from the battery cell 11 is provided with mica paper 7, and the mica paper 7 extends to the side of the side plate 22 in the third direction e3 away from the battery cell 11. The insulation performance of the upper cover 2 can be further improved by the mica paper 7. In addition, the end of the mica paper 7 in the third direction e3 away from the side plate 22 is spaced apart from the end of the cover body 21 away from the side plate 22. The mica paper 7 can cover the range of the busbar 3 in the third direction e3, and the mica paper 7 can be saved.

[0049] According to some embodiments of the present application, as shown in Figure 1 and Figure 7 The battery module 100 further comprises a busbar support 4 and an output pole protection base 5, the busbar support 4 is connected with the busbar 3 and fixed on the output pole protection base 5, and the output pole protection base 5 is arranged on the side of the battery cell group 1 in the first direction e1. The upper cover 2 further comprises an outer extension shielding plate 25 arranged on the end of the cover body 21 in the first direction e1 close to the output pole protection base 5. The outer extension shielding plate 25 and the part of the busbar support 4 arranged on the output pole protection base 5 are arranged opposite to each other in the second direction e2 and are adhesively connected. That is, the outer extension shielding plate 25 covers one side of the part of the busbar support 4 fixed on the output pole protection base 5. Therefore, the outer extension shielding plate 25 can provide good insulation and protection for the busbar support 4.

[0050] According to some embodiments of the present application, as shown in Figure 7 and Figure 8 The end of the cover body 21 close to the outer extension shielding plate 25 is provided with a side edge bending 24, the side edge bending 24 extends towards the direction close to the battery cell 11 and is arranged in the second direction e2 away from the outer extension shielding plate 25, and the cover body 21 is formed with a crack stopping groove 211 between the outer extension shielding plate 25 and the side edge bending 24. Therefore, by arranging the crack stopping groove 211, the stress at the side edge bending 24 can be well dispersed, so that the connection between the side edge bending 24 and the cover body 21 can be prevented from being broken due to stress concentration.

[0051] In one specific example, the extension shielding plate 25 is located at the middle of the cover body 21 in the third direction e3, and opposite sides of the extension shielding plate 25 in the third direction e3 are respectively provided with a side bending 24, which can ensure the shielding effect of the side bending 24, and the extension shielding plate 25 and the two side bendings 24 are respectively provided with a corresponding crack stopping groove 211.

[0052] According to some embodiments of the present application, the extension shielding plate 25 is connected with the busbar support 4 by adhesive. Thus, by connecting the extension shielding plate 25 with the busbar support 4, the connecting position between the upper cover 2 and the battery cell group 1 can be increased, so that the firm installation of the upper cover 2 can be ensured. In one specific example, the extension shielding plate 25 is provided with double-sided adhesive tape 6 on the side surface facing the battery cell 11, so as to realize the adhesive connection between the extension shielding plate 25 and the busbar support 4.

[0053] In some embodiments, the cover body 21 is provided with a side bending 24 at one end close to the extension shielding plate 25, the side bending 24 extends towards the direction close to the battery cell 11 and is arranged along the second direction e2 with the extension shielding plate 25, the cover body 21 is formed with a crack stopping groove 211 between the extension shielding plate 25 and the side bending 24, and the extension shielding plate 25 is connected with the busbar support 4 by adhesive, so that the firm installation of the upper cover 2 can be ensured while avoiding the breakage of the side bending 24.

[0054] The present application provides a battery pack in the second aspect.

[0055] According to the battery pack of the second aspect of the present application, the battery pack comprises a battery module 100.

[0056] According to the battery pack of the second aspect of the present application, by arranging the support strip 23 on the upper cover 2, during the assembly of the battery module 100, the functions of insulation protection and maintaining the spacing between the adjacent two battery cells 11 can be realized at the same time by installing the upper cover 2, and the tooling or filler for limiting the spacing between the adjacent two battery cells 11 can be omitted, so that the assembly efficiency of the battery module 100 can be improved and the assembly cost of the battery module 100 can be reduced, and in addition, the adjacent two battery cells 11 can stably clamp the support strip 23 to increase the friction between the support strip 23 and the battery cell 11, so that the support strip 23 can be prevented from being pulled out of the gap between the adjacent two battery cells 11, and the firm installation of the upper cover 2 can be ensured.

[0057] In the utility model, unless another definite provision and limitation, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be direct link, also can pass through intermediate medium indirectly link, can be two element inside's intercommunication or two element's mutual action relation. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0058] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0059] Although the embodiments of the present utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery module, characterized by, The application relates to a battery cell group, which comprises a plurality of battery cells arranged along a first direction, and the pole columns of the battery cells are located on the end surface of the battery cells in a second direction perpendicular to the first direction; an upper cover, which is an insulating part and is arranged at the end of the battery cells in the second direction, and the upper cover comprises a cover body and a side plate, the cover body is arranged along the second direction with the battery cells, the side plate is arranged at one end of the cover body in a third direction perpendicular to the first direction and the second direction and extends towards the battery cells, at least part of the side plate is arranged opposite to the side surface of the battery cells in the third direction, a support strip is arranged on the side surface of the battery cells towards the side plate, and at least part of the support strip is located between two adjacent battery cells and abuts against the two battery cells on the opposite sides of the support strip. The part of the support strip inserted between two adjacent battery cells is a support part, and the length L1 of the support part in the third direction and the size L2 of the battery cells in the third direction satisfy the condition L1 / L2>=50%. In the third direction, the length L3 of the support strip, the distance L4 between the side surface of the battery cells away from the side plate and the side plate satisfy the condition L3<=L4.

2. The battery module of claim 1, wherein, The support strip is arranged in a plurality of intervals along the first direction, a set gap is defined between any two adjacent battery cells, the plurality of support strips and the plurality of set gaps are the same in number and one-to-one corresponding.

3. The battery module of claim 1, wherein, The connecting position of the support strip and the side plate is chamfered; and / or the two ends of the cover body in the first direction are further provided with side edge bends extending towards the battery cells, and the battery cell group is located between the side edge bends on the two sides.

4. The battery module of claim 1, wherein, The cover body can be flipped relative to the side plate; and / or the upper cover is a plastic part.

5. The battery module of claim 1, wherein, A bus bar is further arranged, the bus bar is connected at the end of the battery cells in the second direction, the cover body is located on the side of the bus bar away from the battery cells, the support strip and the cover body are arranged in intervals along the second direction, and the support strip is located on the side of the bus bar away from the cover body.

6. The battery module of claim 1, wherein, A bus bar support and an output pole protection base are further arranged, the bus bar support is connected with the bus bar and fixed on the output pole protection base, the output pole protection base is arranged on the side surface of the battery cell group in the first direction, the upper cover further comprises an extension shielding plate, the extension shielding plate is arranged at one end of the cover body in the first direction close to the output pole protection base, and the extension shielding plate and the part of the bus bar support arranged on the output pole protection base are arranged opposite to each other along the second direction.

7. The battery module of claim 1, wherein, One end of the cover body close to the extension shielding plate is provided with a side edge bend extending towards the battery cells and arranged along the second direction with the extension shielding plate, a crack stopping groove is formed on the cover body between the extension shielding plate and the side edge bend; and / or the extension shielding plate and the bus bar support are connected by gluing.

8. The battery module of claim 7, wherein, The application relates to a battery cell group, which comprises a plurality of battery cells arranged along a first direction, and the pole columns of the battery cells are located on the end surface of the battery cells in a second direction perpendicular to the first direction; an upper cover, which is an insulating part and is arranged at the end of the battery cells in the second direction, and the upper cover comprises a cover body and a side plate, the cover body is arranged along the second direction with the battery cells, the side plate is arranged at one end of the cover body in a third direction perpendicular to the first direction and the second direction and extends towards the battery cells, at least part of the side plate is arranged opposite to the side surface of the battery cells in the third direction, a support strip is arranged on the side surface of the battery cells towards the side plate, and at least part of the support strip is located between two adjacent battery cells and abuts against the two battery cells on the opposite sides of the support strip.

9. The battery module of claim 8, wherein, The part of the support strip inserted between two adjacent battery cells is a support part, and the length L1 of the support part in the third direction and the size L2 of the battery cells in the third direction satisfy the condition L1 / L2>=50%.

10. A battery pack, characterized by, In the third direction, the length L3 of the support strip, the distance L4 between the side surface of the battery cells away from the side plate and the side plate satisfy the condition L3<=L4. The support strip is arranged in a plurality of intervals along the first direction, a set gap is defined between any two adjacent battery cells, the plurality of support strips and the plurality of set gaps are the same in number and one-to-one corresponding. The connecting position of the support strip and the side plate is chamfered; and / or the two ends of the cover body in the first direction are further provided with side edge bends extending towards the battery cells, and the battery cell group is located between the side edge bends on the two sides. The cover body can be flipped relative to the side plate; and / or the upper cover is a plastic part. A bus bar is further arranged, the bus bar is connected at the end of the battery cells in the second direction, the cover body is located on the side of the bus bar away from the battery cells, the support strip and the cover body are arranged in intervals along the second direction, and the support strip is located on the side of the bus bar away from the cover body. A bus bar support and an output pole protection base are further arranged, the bus bar support is connected with the bus bar and fixed on the output pole protection base, the output pole protection base is arranged on the side surface of the battery cell group in the first direction, the upper cover further comprises an extension shielding plate, the extension shielding plate is arranged at one end of the cover body in the first direction close to the output pole protection base, and the extension shielding plate and the part of the bus bar support arranged on the output pole protection base are arranged opposite to each other along the second direction. One end of the cover body close to the extension shielding plate is provided with a side edge bend extending towards the battery cells and arranged along the second direction with the extension shielding plate, a crack stopping groove is formed on the cover body between the extension shielding plate and the side edge bend; and / or the extension shielding plate and the bus bar support are connected by gluing. The battery module according to any one of claims 1 to 9.

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