CN219892368U - Battery module - Google Patents

Abstract

The utility model discloses a battery module, which comprises: the battery cell groups are sequentially arranged along the first direction, and each battery cell group is provided with a positive pole post and a negative pole post; the busbar is suitable for electrically connecting the positive electrode post of one cell group with the negative electrode post of the adjacent other cell group; the sections of the positive electrode post and the negative electrode post are both polygonal, and in two adjacent cell groups, one side of the positive electrode post of one cell group, facing the positive electrode post of the other cell group, is provided with a first bevel edge, and an included angle between the first bevel edge and the first direction is an acute angle. According to the battery module, when the busbar is connected with the positive pole post, the first bevel edge can provide an avoidance space for the busbar, and the busbar is bent less, so that the overcurrent area of the middle part of the busbar can be increased, the single-layer overcurrent capacity of the busbar can meet the use requirement, thickening treatment is not needed, and the manufacturing cost is reduced.

Description

Battery module

Technical Field

The utility model relates to the field of battery assembly, in particular to a battery module.

Background

In the related art, the battery cells in the battery module are connected in series through the bus bars, and then the positive electrode terminal and the negative electrode terminal are led out, when the bus bars are installed, the width of the bus bars is narrower on the premise of meeting the minimum creepage clearance of 4mm, the single-layer overcurrent capacity is insufficient, thickening treatment is required to be carried out on the bus bars, so that the manufacturing cost can be increased, if the thickening treatment is not carried out, the overcurrent area at the middle position of the bus bars is smaller, and the safety problems such as heating can be caused.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the battery module, the overcurrent area of the middle area of the bus bar of the battery module is larger, the single-layer overcurrent can meet the use requirement, the thickening treatment of the bus bar is not needed, and the manufacturing cost can be reduced.

According to an embodiment of the utility model, a battery module includes: the battery cell groups are sequentially arranged along a first direction and are provided with positive electrode posts and negative electrode posts; a busbar adapted to electrically connect the positive electrode post of one of the cell groups with the negative electrode post of an adjacent other of the cell groups; the sections of the positive electrode post and the negative electrode post are polygonal, and in two adjacent cell groups, one side of the positive electrode post of one cell group, facing the positive electrode post of the other cell group, is provided with a first bevel edge, and an included angle between the first bevel edge and the first direction is an acute angle; and/or in two adjacent electric core groups, one side of the negative electrode pole of one electric core group facing the negative electrode pole of the other electric core group is provided with a second bevel edge, and an included angle between the second bevel edge and the first direction is an acute angle.

According to the battery module provided by the embodiment of the utility model, the sections of the positive electrode post and the negative electrode post of the battery cell group are polygonal, in the two adjacent battery cell groups, the positive electrode post of one battery cell group faces one side of the positive electrode post of the other battery cell group, the included angle between the first inclined edge and the first direction is an acute angle, and by the arrangement, the first inclined edge can provide an avoidance space for the bus bar when the bus bar is connected with the positive electrode post, so that the bus bar is bent less when the minimum creepage distance of 4mm is met, the overcurrent area of the middle part of the bus bar can be increased, the use requirement can be met, thickening treatment is not needed, and the manufacturing cost is reduced.

According to some embodiments of the utility model, the busbar comprises two end regions electrically connected to the positive and negative electrode posts, respectively, and a middle region connected between the two end regions.

According to some embodiments of the utility model, the battery cell group includes a battery cell, the battery cell is provided with the positive electrode post and the negative electrode post, and the length direction of the busbar is parallel to the extending direction of the first oblique side.

According to the battery module of some embodiments of the present utility model, the width of the middle region is D1, and 25.5mm < D1 is satisfied.

According to some embodiments of the utility model, the battery cell group includes two battery cells, the two battery cells are sequentially arranged along a first direction, each battery cell is provided with the positive electrode post and the negative electrode post, and the end region is suitable for being electrically connected with two positive electrode posts or the negative electrode post of the same battery cell group.

According to some embodiments of the utility model, the end regions are connected to the middle region in a bending manner, and the extending direction of the middle region is parallel to the extending direction of the first oblique side.

According to the battery module of some embodiments of the present utility model, the width of the middle region is D2, and 29.24mm < D2 is satisfied.

According to the battery module of some embodiments of the present utility model, the positive electrode post and the negative electrode post are spaced apart from each other at one end of the cell group in the length direction.

According to some embodiments of the utility model, the first direction is a thickness direction of the battery cell group.

According to the battery module according to some embodiments of the present utility model, the polygonal configuration is one of a diamond, or a pentagon, or a hexagon, or an octagon.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is an exploded view of a battery module according to an embodiment of the present utility model;

fig. 2 is an exploded view of a battery module according to another embodiment of the present utility model;

fig. 3 is a schematic view of the battery module of fig. 1 (concealing the insulation shield layer and CCS assembly);

fig. 4 is a schematic view of the battery module of fig. 2 (concealing the insulation shield layer and CCS assembly);

fig. 5 is a front view of the battery module of fig. 1 (concealing the insulation shield layer and CCS assembly);

fig. 6 is a front view of the battery module of fig. 2 (concealing the insulation shield layer and CCS assembly);

FIG. 7 is a schematic view of the CCS bracket of FIG. 1;

FIG. 8 is a schematic view of the CCS bracket of FIG. 2;

FIG. 9 is a schematic diagram of the bus bar and the positive and negative terminals of FIG. 1;

FIG. 10 is a schematic view of the bus bar and the positive and negative terminals of FIG. 2;

fig. 11 is a schematic view of a battery module (concealing CCS brackets, CCS assemblies, and insulating protective layers) according to an embodiment of the present utility model;

fig. 12 is a front view of a battery module (concealing CCS brackets, CCS assemblies, and insulating protective layers) according to an embodiment of the present utility model;

fig. 13 is a schematic diagram of a battery cell according to an embodiment of the utility model;

FIG. 14 is a schematic view of one form of positive and negative electrode posts of a battery cell according to an embodiment of the utility model;

FIG. 15 is a schematic view of another form of positive and negative electrode posts of a cell according to an embodiment of the utility model;

FIG. 16 is a schematic view of another form of positive and negative electrode posts of a cell according to an embodiment of the utility model;

FIG. 17 is a schematic view of another form of positive and negative electrode posts of a cell according to an embodiment of the utility model;

fig. 18 is a schematic view of another form of positive and negative electrode posts of a cell according to an embodiment of the utility model.

Reference numerals:

the battery module 100 is provided with a battery module,

a battery cell group 10, a battery cell 11, a positive pole post 12, a negative pole post 13, an explosion-proof valve 14,

a busbar 20, end regions 21, intermediate regions 22,

CCS support 30, spacer tape 31,

CCS assembly 40, positive terminal 41, negative terminal 42,

the insulation protection layer comprises a first inclined edge 1, a second inclined edge 2, an end plate 3, an upper side plate 4, a lower side plate 5, a first horizontal line 6, a second horizontal line 7 and an insulation protection layer 8.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

A battery module 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 18.

As shown in fig. 1 to 2, a battery module 100 according to an embodiment of the present utility model, the battery module 100 includes: a plurality of cell groups 10 and a bus bar 20.

Specifically, the plurality of battery cell groups 10 are arranged in sequence along the first direction, the battery cell groups 10 are provided with positive electrode posts 12 and negative electrode posts 13, and the bus bar 20 is suitable for electrically connecting the positive electrode posts 12 of one battery cell group 10 with the negative electrode posts 13 of the adjacent other battery cell group 10. The sections of the positive electrode post 12 and the negative electrode post 13 are polygonal, and in two adjacent cell groups, one side of the positive electrode post 12 of one cell group facing the positive electrode post 12 of the other cell group is provided with a first bevel edge 1, and an included angle between the first bevel edge 1 and the first direction is an acute angle; and/or in two adjacent cell groups, one side of the negative electrode pole 13 of one cell group, facing the negative electrode pole 13 of the other cell group, is provided with a second inclined edge 2, and the included angle between the second inclined edge and the first direction of the second inclined edge 2 is an acute angle.

Therefore, when the busbar 20 is connected with the positive electrode post 12 of the adjacent one of the cell groups 10 and the negative electrode post 13 of the other cell group 10, the busbar 20 cannot be bent for multiple times, meanwhile, the first oblique side on the positive electrode post 12 and the second oblique side on the negative electrode post 13 can provide avoidance space for the busbar 20 when being installed, so that the flow area of the busbar 20 is larger, in the related art, when the busbar 20 is installed in the cell group 10, after the positive electrode post 12 and the negative electrode post 13 are covered, multiple times of bending are needed, so that the flow area of the busbar 20 is smaller, and therefore, the flow capacity of the busbar 20 in the embodiment is stronger than that of the busbar 20 in the related art, the busbar 20 in the embodiment can meet the use requirement by adopting a single-layer design and does not need to be thickened, so that the manufacturing cost can be reduced.

For example, the first direction is the thickness direction of the cell groups 10, and the positive electrode posts 12 and the negative electrode posts 13 are located on the thickness surface of the cell 11, so that the distance between the positive electrode posts 12 or the negative electrode posts 13 of two adjacent cell groups 10 is smaller, so that the bus bar 20 can realize electrical connection between the two adjacent cell groups 10. It should be noted that, when the busbar 20 is installed, the distance between two adjacent busbars 20 needs to satisfy that the minimum creepage clearance is 4mm, and the cross-sectional shape of the existing pole is generally rectangular, which causes that the busbar 20 needs to be bent for multiple times to avoid the positive pole and the negative pole when being installed, the overcurrent area of the middle portion is smaller, the overcurrent capacity of a single layer is insufficient, in the related art, the overcurrent capacity of the busbar 20 is increased by generally adopting a mode of thickening the middle portion, but the busbar 20 is excessively thick, namely the volume of the busbar 20 is larger, and the production cost is increased.

In this embodiment, through the above arrangement, the busbar 20 does not need to be bent for many times when being mounted on the battery cell group 10, so that the overcurrent area of the middle area of the busbar 20 is larger when the minimum creepage clearance of 4mm is met, and the single-layer overcurrent capability can meet the use requirement, so that thickening treatment is not needed, and the manufacturing cost is reduced.

The battery cell group 10 may include one battery cell 11, and of course, a plurality of battery cells 11 may be further disposed in the battery cell group 10, for example, two battery cells 11 may be disposed in the battery cell group 10, or more battery cells 11 may be disposed as required, which is not limited herein, the positive electrode post 12 and the negative electrode post 13 of the battery cell 11 in the battery cell group 10 are located on the thickness plane of the battery cell 11, the side surface of the battery cell 11 is further provided with an explosion-proof valve 14, the explosion-proof valve 14 is asymmetric with respect to the symmetry line of the electrode posts, and the battery cells 11 in the battery cell group 10 are all located on the same side.

Therefore, the number of the electric cores 11 in the electric core group 10 can be one or two according to the requirement, or more electric cores 11 can be arranged, in the electric core group 10, the explosion-proof valves 14 are all positioned on the same side, and the polar posts of the electric cores 11 are all positioned on the thickness surface of the electric cores 11, so that the distance between the polar posts is shorter.

According to the battery module 100 of the embodiment of the utility model, the sections of the positive electrode post 12 and the negative electrode post 13 of the battery cell group 10 are both polygonal, and in two adjacent battery cell groups 10, one side of the positive electrode post 12 of one battery cell group 10 facing the positive electrode post 12 of the other battery cell group 10 is provided with the first inclined edge 1, the included angle between the first inclined edge 1 and the first direction is an acute angle, and by means of the arrangement, when the bus bar 20 is connected with the positive electrode post 12, the first inclined edge 1 can provide an avoidance space for the bus bar 20, so that the bus bar 20 is bent less when the minimum creepage distance of 4mm is met, the overcurrent area of the middle part of the bus bar 20 can be increased, the single-layer overcurrent capacity of the bus bar 20 can meet the use requirement, thickening treatment is not needed, and the manufacturing cost is reduced.

Alternatively, as shown in fig. 1-2, the battery module 100 further includes a CCS bracket 30, the CCS bracket 30 is mounted on a side of the battery cell 10 provided with the positive electrode post 12 and the negative electrode post 13, and a CCS assembly 40 may be mounted on the CCS bracket 30, and the bus bar 20, the positive electrode terminal 41 and the negative electrode terminal 42 may be fixed on the CCS assembly 40, and an insulating protection layer 8 may be mounted on a side of the CCS assembly 40 facing away from the CCS bracket 30.

Further, after the plurality of battery cell groups 10 are sequentially arranged along the first direction, CCS (integrated busbar/harness board integrated component) supports are mounted on the sides of the positive electrode post 12 and the negative electrode post 13 of the battery cell group 10, avoidance holes corresponding to the positive electrode post 12 and the negative electrode post 13 are formed in the CCS supports 30, and during actual assembly, the positive electrode post 12 and the negative electrode post 13 can pass through the corresponding avoidance holes to be electrically connected with the busbar 20.

In some embodiments, as shown in fig. 1 to 4, the battery module 100 further includes: the end plates 3, the end plates 3 are provided with two, the two end plates 3 are respectively arranged at two sides of the cell group 10 to protect the cell group 10, and meanwhile, the upper side plate 4 and the lower side plate 5 are arranged at the upper end and the lower end of the cell group 10 to protect the cell group 10 at the upper side and the lower side of the cell group 10.

Wherein still be equipped with the median 31 on CCS support 30, the median 31 can carry out spacingly to busbar 20 for busbar 20 is more convenient when the installation, can avoid contacting between the adjacent busbar 20 simultaneously, avoids the risk of short circuit, and the insulating protection layer 8 in the CCS assembly 40 outside also can play the guard action to busbar 20.

It should be noted that, the CCS bracket 30 is disposed on the post side of the battery cell group 10, so as to improve the assembly efficiency, so that the manufacturing speed is faster, the busbar 20 is also disposed on the CCS assembly 40, the CCS assembly 40 is provided with the same mounting opening at the position of the opening of the CCS bracket 30, the mounting opening is used for fixing the busbar 20, the CCS assembly 40 and the CCS bracket 30 make the assembly efficiency of the battery module 100 higher, and meanwhile, on the CCS bracket 30 and the CCS assembly 40, the positive electrode terminal 41 and the negative electrode terminal 42 are respectively fixed on two sides of the CCS assembly 40, so that after the battery module 100 is assembled, the battery module 100 can be directly connected with other electric devices through the positive electrode terminal 41 and the negative electrode terminal 42.

Therefore, when a plurality of battery cell groups 10 are assembled into the battery module 100, the battery cell groups 10 can be orderly arranged through the CCS bracket 30, meanwhile, the installation limit is provided for the bus bar 20, the bus bar 20 is firstly installed on the CCS assembly 40 and then connected with the battery cell groups 10, so that the assembly efficiency of the battery module 100 is improved, and the production speed can be improved.

In some embodiments, as shown in fig. 3-6 and 9-10, the busbar 20 includes two end regions 21 and an intermediate region 22, the two end regions 21 being electrically connected to the positive and negative electrode posts 12, 13, respectively, and the intermediate region 22 being connected between the two end regions 21.

Therefore, when the bus bar 20 is electrically connected with the positive electrode post 12 and the negative electrode post 13, the positive electrode post 12 and the negative electrode post 13 are polygonal, so that the bus bar 20 does not need to be bent for many times during installation, and the middle area 22 of the bus bar 20 can have enough overcurrent area to meet the use requirement, and thickening treatment of the bus bar 20 is not needed.

For example, when the sections of the positive electrode post 12 and the negative electrode post 13 are polygonal, after the end regions 21 of the bus bar 20 are respectively connected with the positive electrode post 12 and the negative electrode post 13 of the adjacent two cell groups 10, one side of the end region 21 of the bus bar 20 is directly connected with the other side end region 21, so that the bus bar 20 does not need to be bent for multiple times, so that the bus bar 20 can have a larger bus area when the minimum creepage clearance of 4mm is met, and the middle region 22 of the bus bar 20 can have a sufficient bus area, so that the bus bar 20 does not need to be thickened.

In some embodiments, as shown in fig. 1, the battery cell group 10 includes one battery cell 11, where the battery cell 11 is provided with a positive electrode post 12 and a negative electrode post 13, and the length direction of the bus bar 20 is parallel to the extending direction of the first oblique side 1.

Specifically, in this embodiment, the cell group 10 includes one cell 11, and the bus bar 20 can connect the positive electrode post 12 and the negative electrode post 13 of two adjacent cells 11 in series sequentially, and the isolation belt 31 on the CCS bracket 30 also isolates the single post, where the length direction of the bus bar 20 is parallel to the extending direction of the first oblique side 1 covered by the bus bar 20, and the two long sides of the bus bar 20 are also parallel to the first oblique side 1.

Therefore, the busbar 20 is not bent for many times when the positive electrode post 12 and the negative electrode post 13 are connected, so that the middle area 22 of the busbar 20 has enough busbar area, and the overcurrent area of the middle area 22 of the busbar 20 is ensured to meet the use requirement.

In some embodiments, as shown in FIG. 9, the intermediate region 22 has a width D1 and meets 25.5 mm.ltoreq.D1.

It will be appreciated that in the case when the battery pack 10 includes one cell 11, the intermediate region 22 of the busbar 20 connecting the positive and negative poles 12, 13 of the cell 11 is directly connected to both ends, and there is no bending.

For example, the width D1 of the middle region 22 may be d1=25.5 mm, d1=26 mm, d1=26.5 mm, or the like, where d1=25.5 mm is a case where the side edge of the middle region 22 and the first oblique side 1 of the pole are on the same line.

In some embodiments, as shown in fig. 2, the cell group 10 includes two cells 11, the two cells 11 are sequentially arranged along the first direction, each cell 11 is provided with a positive electrode post 12 and a negative electrode post 13, and the end region 21 is adapted to be electrically connected to two positive electrode posts 12 or negative electrode posts 13 of the same cell group 10.

Specifically, in the present embodiment, the battery cell group 10 includes two battery cells 11, so when the bus bar 20 connects two adjacent battery cell groups 10, two ends of the bus bar 20 are connected to two positive electrode posts 12 or two negative electrode posts 13 of the two adjacent battery cell groups 10, respectively, and then the middle region 22 is connected to the two ends, and the width of the middle region 22 of the bus bar 20 is wider.

Therefore, when the cell group 10 includes two cells 11, the area of the middle region 22 of the busbar 20 is larger, the overcurrent capability is better, and when a single-layer design is adopted, the cell group can be as thin as possible, so that the manufacturing cost is lower.

In some embodiments, as shown in fig. 10, the end regions 21 are connected to the middle region 22 by bending, and the extending direction of the middle region 22 is parallel to the extending direction of the first oblique side 1.

After the connection, the end regions 21 are connected to the two poles, and the intermediate regions 22 are connected together by the intermediate regions 22, and the extending direction of the intermediate regions 22 is the same as that of the first oblique sides 1, but the width of the intermediate regions 22 is not smaller than the distance between the two first oblique sides 1, so that the bus bar 20 can be made thinner as much as possible while adopting a single-layer design.

Thus, in the case of the present embodiment, the width of the bus bar 20 can be made thinner while adopting a single-layer design, thereby further reducing the manufacturing cost.

In some embodiments, as shown in FIG. 10, the intermediate region 22 has a width D2 and meets 29.24mm < D2.

It should be noted that, when the end regions 21 of the bus bar 20 are connected to the two poles, the width of the middle region 22 is D2, where D2 satisfies 29.24mm r 2, for example, d2=29.24 mm, or d2=30 mm, or d2=31 mm, which satisfies the design requirement, and the width of the bus bar 20 in this case is further increased, so that the bus bar 20 can be made thinner while adopting a single-layer design.

In some embodiments, as shown in fig. 11-12, positive and negative electrode posts 12, 13 are spaced apart at one end of the cell stack 10 in the length direction.

Specifically, when the plurality of battery cell groups 10 are sequentially arranged, the positive electrode post 12 and the negative electrode post 13 are located on the same side face of the battery cell group 10, the center of the positive electrode post 12 is located on the first horizontal line 6 in the first direction, the center of the negative electrode post 13 is also located on the second horizontal line 7 in the first direction, the first horizontal line 6 and the second horizontal line 7 are parallel to the first direction and are not overlapped, meanwhile, the explosion-proof valve 14 of the battery cell group 10 is located at the bottom of the battery cell group 10, the explosion-proof valve 14 is located at the bottom of the battery cell group 10, and an installation space can be avoided for the CCS bracket 30.

Thus, the positive electrode pole 12 is located on the first horizontal line 6, and the negative electrode pole 13 is located on the second horizontal line 7, so that the bus bar 20 is installed at a faster speed during the installation process, and the assembly efficiency of the battery module 100 is higher.

In some embodiments, as shown in fig. 1-2 and 11, the first direction is the thickness direction of the cell stack 10.

Thus, the distance between the positive electrode post 12 or the negative electrode post 13 of the adjacent two cell groups 10 can be made smaller, so that the bus bar 20 can realize electrical connection between the adjacent two cell groups 10.

In some embodiments, as shown in fig. 14-17, the polygon is configured as one of a diamond, or pentagon, or hexagon, or octagon.

It should be noted that, in some embodiments, the polygon may be configured as a diamond, or the polygon may be configured as a pentagon, or the polygon may be configured as a hexagon with parallel sides, or the polygon may be configured as an octagon with parallel sides, and the shape of the polygon is not limited to these shapes, so long as the flow area in the middle area of the busbar 20 can meet the use requirement, the polygon may be configured as other shapes as required, and the shapes in the embodiments are merely illustrative.

When the polygon is configured as a pentagon, the first oblique side 1 and/or the second oblique side 2 of the polygon may also form an acute angle with the included angle of the first direction, when the busbar 20 is arranged, the first oblique side 1 on the positive pole post 12 and the second oblique side 2 on the negative pole post 13 may also provide a certain avoiding space for the busbar 20, and when the minimum creepage clearance is 4mm, the overcurrent area in the middle area of the busbar 20 may also satisfy the use requirement, so that the busbar 20 does not need thickening treatment, thereby saving cost.

Thus, the polygon can be configured into other shapes as needed, so that the arrangement form of the bus bars 20 can be selected more, and the bus bars 20 can be connected more conveniently while the width is increased.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery module, comprising:

the battery cell groups are sequentially arranged along a first direction and are provided with positive electrode posts and negative electrode posts;

a busbar adapted to electrically connect the positive electrode post of one of the cell groups with the negative electrode post of an adjacent other of the cell groups;

the sections of the positive electrode post and the negative electrode post are polygonal, and in two adjacent cell groups, one side of the positive electrode post of one cell group, facing the positive electrode post of the other cell group, is provided with a first bevel edge, and an included angle between the first bevel edge and the first direction is an acute angle;

and/or in two adjacent electric core groups, one side of the negative electrode pole of one electric core group facing the negative electrode pole of the other electric core group is provided with a second bevel edge, and an included angle between the second bevel edge and the first direction is an acute angle.

2. The battery module of claim 1, wherein the buss bar includes two end regions electrically connected to the positive and negative electrode posts, respectively, and an intermediate region connected between the two end regions.

3. The battery module according to claim 2, wherein the cell group includes one cell provided with the positive electrode post and the negative electrode post, and a length direction of the bus bar is parallel to an extending direction of the first oblique side.

4. The battery module according to claim 3, wherein the width of the middle region is D1 and satisfies 25.5mm +.d1.

5. The battery module according to claim 2, wherein the cell group includes two cells, the two cells are arranged in sequence along a first direction, and each cell is provided with the positive electrode post and the negative electrode post, and the end region is adapted to be electrically connected with two positive electrode posts or the negative electrode post of the same cell group.

6. The battery module according to claim 5, wherein the end regions are bent to be connected to the middle region, and an extending direction of the middle region is parallel to an extending direction of the first oblique side.

7. The battery module according to claim 6, wherein the width of the middle region is D2 and 29.24mm ∈d2 is satisfied.

8. The battery module according to claim 1, wherein the positive electrode tab and the negative electrode tab are spaced apart at one end in the length direction of the cell group.

9. The battery module of claim 5, wherein the first direction is a thickness direction of the cell stack.

10. The battery module according to any one of claims 1 to 9, wherein the polygonal configuration is one of a diamond, or pentagon, or hexagon, or octagon.