CN219371285U - Battery module, battery module and battery pack - Google Patents

Abstract

The utility model provides a battery module, a battery module and a battery pack. The battery module includes: a module case including a case body and end plate members provided at both ends of the case body; the positive electrode terminal and the negative electrode terminal are oppositely arranged along a first direction; the two ends of the battery core are respectively provided with a positive electrode lug and a negative electrode lug which extend along the first direction, the positive electrode lug is electrically connected with the positive electrode terminal, the negative electrode lug is electrically connected with the negative electrode terminal, and the positive electrode lug and the negative electrode lug are not bent; the positive terminal comprises a positive connecting surface parallel to the first direction, and the positive lug penetrates through the end plate part and is attached to the positive connecting surface; the negative terminal includes a negative connection face parallel to the first direction, and the negative tab extends through the end plate member and engages the negative connection face. The positive electrode lug and the negative electrode lug of the battery core in the battery module are respectively and straightly electrically connected to the positive electrode terminal and the negative electrode terminal, so that the bending of the electrode lug is avoided, the occurrence probability of cracks of the positive electrode lug and the negative electrode lug can be effectively reduced, and the manufacturing yield of the battery module is improved.

Description

Battery module, battery module and battery pack

Technical Field

The present utility model relates to the field of battery manufacturing, and in particular, to a battery module, and a battery pack.

Background

Along with the gradual deep industrialization progress of new energy automobiles, the development of the power battery field of the lithium battery industry is enhanced in all countries and key enterprises worldwide, and the safety, the service life and the quick charging capability of the current power battery for vehicles are greatly improved in the development direction of the industrial technology.

In the battery in the related art, the battery core tab is bent generally, however, metal fatigue is easy to occur at the bending part of the tab, and the bending also easily causes cracks due to stress concentration, so that the yield of battery manufacturing is reduced, in addition, the procedure of module manufacturing is increased due to the bending of the tab, and the manufacturing cost is increased.

Disclosure of Invention

The utility model aims at solving at least one of the technical problems in the prior art, and provides a battery module, a battery module and a battery pack, wherein a positive electrode lug and a negative electrode lug are respectively and directly electrically connected to the positive electrode terminal and the negative electrode lug so as to avoid bending of the positive electrode lug, and the probability of cracking of the positive electrode lug and the negative electrode lug can be effectively reduced, so that the manufacturing yield of the battery module is improved.

To achieve the object of the present utility model, there is provided a battery module including: the module shell comprises a shell body and end plate parts, wherein the end plate parts are covered at two ends of the shell body, and the shell body and the end plate parts are encircled to form an accommodating space; one of the end plate members is provided with a positive terminal at the other side of the accommodation space, and the other end plate member is provided with a negative terminal at the other side of the accommodation space, the positive terminal and the negative terminal being arranged opposite to each other in the first direction; the battery cell is arranged in the accommodating space, two ends of the battery cell are respectively provided with a positive electrode lug and a negative electrode lug which extend along the first direction, the positive electrode lug is electrically connected with the positive electrode terminal, the negative electrode lug is electrically connected with the negative electrode terminal, and the positive electrode lug and the negative electrode lug are not bent; the positive terminal comprises a positive connecting surface parallel to the first direction, and the positive lug penetrates through the end plate part and is attached to the positive connecting surface; the negative terminal includes a negative connection face parallel to the first direction, and the negative tab extends through the end plate member and engages the negative connection face.

Further, the battery module comprises two electric cores, the two electric cores are stacked in the shell body along the second direction perpendicular to the first direction, positive lugs of the two electric cores are respectively arranged on two positive connection surfaces of the positive terminal, which are oppositely arranged along the second direction, and negative lugs of the two electric cores are respectively arranged on two negative connection surfaces of the negative terminal, which are oppositely arranged along the second direction.

Further, the battery module further includes: the module buffer sheet is arranged between the two battery cores; the module insulating sheet is arranged between the battery core and the shell body.

Further, the positive tab and the negative tab are welded with the positive terminal and the negative terminal, respectively.

Further, the battery module further comprises two module non-contact surfaces which are oppositely arranged along a third direction perpendicular to the first direction and the second direction, and at least one explosion opening is arranged on the module non-contact surfaces.

Further, the case body includes: and two sub-shells symmetrically arranged along the second direction, wherein each sub-shell comprises half of the non-contact surfaces of the two modules.

The utility model also provides a battery module, comprising: a module housing; the battery modules of the embodiments are arranged in the module housing, the battery modules are sequentially stacked along a second direction perpendicular to the first direction in a serial and/or parallel mode, and heat insulation sheets are arranged between adjacent battery modules.

Further, the positive terminal comprises a positive electrode joint surface perpendicular to the first direction, the negative terminal comprises a negative electrode joint surface perpendicular to the first direction, and first connecting holes are respectively formed in the positive electrode joint surface and the negative electrode joint surface; the battery module further includes: at least one bus bar, each bus bar is provided with a second connecting hole, and the single bus bar is electrically connected to the positive electrode joint surface of the adjacent battery module through the second connecting hole and the first connecting hole sequentially by a fastener; or electrically connecting the single bus bar to the negative electrode joint surface of the adjacent battery module through the second connecting hole and the first connecting hole sequentially by the fastener; or electrically connecting the single bus bar to the positive and negative electrode joint surfaces of the adjacent battery modules by sequentially passing the fasteners through the second and first connection holes.

Further, the end surfaces of the two ends of the battery cell along the first direction do not exceed the positive electrode joint surface and the negative electrode joint surface.

Further, the module case includes: the module top plate is arranged on one side of the module non-contact surface of the battery module, which is opposite to the battery module, and is provided with at least one exhaust port corresponding to at least one explosion opening.

Further, the battery module further includes: the module insulating sheet is arranged on one side of the module top plate, which is opposite to the battery module.

The utility model also provides a battery pack, which comprises a battery box body and a battery module or a battery module arranged in the battery box body, and is characterized in that the battery module adopts the battery module of the embodiment; the battery module adopts the battery module of the embodiment.

The utility model has the following beneficial effects:

according to the battery module provided by the utility model, the straight positive electrode lug and the straight negative electrode lug of the battery core are respectively and electrically connected to the positive electrode terminal and the negative electrode lug in a straight mode, so that bending of the folded lugs is avoided, the occurrence probability of cracks of the positive electrode lug and the negative electrode lug can be effectively reduced, and the manufacturing yield of the battery module is further improved.

Other objects and features of the present utility model will become apparent upon review of the specification, claims and drawings of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present utility model will become apparent and readily appreciated from the following description of the 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 enlarged view of a portion a in fig. 1.

Fig. 3 is an enlarged view of a portion B in fig. 1.

Fig. 4 is an exploded view of a case body of a battery module according to an embodiment of the present utility model.

Fig. 5 is a schematic structural view of a battery module according to an embodiment of the present utility model.

Fig. 6 is a front view of fig. 5.

Fig. 7 is an exploded view of a battery module according to an embodiment of the present utility model.

Fig. 8 is an exploded view of a battery module according to another embodiment of the present utility model.

Fig. 9 is an exploded view of a battery module according to another embodiment of the present utility model.

Fig. 10 is a schematic structural view of a battery module according to another embodiment of the present utility model.

Fig. 11 is an enlarged view of a portion C in fig. 10. and

Fig. 12 is a schematic structural view of a battery module according to another embodiment of the present utility model.

Description of main reference numerals:

10. a battery module; 20. a fastener;

100. a battery module;

110. a module housing; 111. a housing body; 1111. a module contact surface; 1112. a module non-contact surface; 1113. a sub-shell; 1114. a burst vent; 112. an end plate member;

120. a battery cell; 121. a positive electrode tab; 122. a negative electrode ear;

130. a positive electrode terminal; 131. a positive electrode connection surface; 132. a positive electrode joint surface; 133. a first connection hole;

140. a negative electrode terminal; 141. a negative electrode connection surface; 143. a first connection hole;

150. a module buffer sheet;

160. a module insulating sheet;

200. a module housing; 210. a module top plate; 211. a discharge port; 220. a module side plate; 230. a module base plate;

300. a heat insulating sheet;

400. a busbar; 410. a second connection hole;

500. a module insulating sheet; 600. a battery monitoring sensor; 700. an anode integrated member;

800. a negative electrode integrated member; 900. and (5) a sampling assembly.

Detailed Description

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

Fig. 1 is an exploded view of a battery module 100 according to an embodiment of the present utility model. Fig. 2 is an enlarged view of a portion a in fig. 1. Fig. 3 is an enlarged view of a portion B in fig. 1. Referring to fig. 1 to 3, a battery module 100 includes a module case 110 and a battery cell 120. The module housing 110 includes a housing body 111 and an end plate member 112. The end plate members 112 are provided at both ends of the case body 111, and the case body 111 and the end plate members 112 define an accommodation space. One of the end plate members 112 is provided with a positive terminal 130 at the other side of the receiving space, and the other end plate member 112 is provided with a negative terminal 140 at the other side of the receiving space, the positive terminal 130 and the negative terminal 140 being disposed opposite to each other in the first direction.

The battery cell 120 is disposed in the accommodating space. Both ends of the battery cell 120 are respectively provided with a positive electrode tab 121 and a negative electrode tab 122 extending along the first direction. The positive electrode tab 121 is electrically connected to the positive electrode terminal 130, the negative electrode tab 122 is electrically connected to the negative electrode terminal 140, and neither the positive electrode tab 121 nor the negative electrode tab 122 is bent.

The positive electrode terminal 130 includes a positive electrode connection surface 131 parallel to the first direction, and the positive electrode tab 121 penetrates the end plate member 112 and is attached to the positive electrode connection surface 131. The negative terminal 140 includes a negative connecting surface 141 parallel to the first direction, and the negative tab 122 extends through the end plate member 112 and engages the negative connecting surface 141.

It should be noted that, in the spatial coordinates at the lower right corner in fig. 1, the direction of the Y axis is the first direction.

It will be appreciated that the housing body 111 and the end plate member 112 together serve to secure the battery cells 120. The end plate member 112 can also be used to secure the positive and negative terminals 130, 140.

In some embodiments, the case body 111 may be made of a metal material, so as to conduct heat to the battery cells 120, and avoid thermal runaway of the battery module 100.

Fig. 10 is a schematic structural view of a battery module 10 according to another embodiment of the present utility model. Fig. 11 is an enlarged view of a portion C in fig. 10. Referring to fig. 10 and 11, the positive electrode tab 121 and the negative electrode tab 122 of the battery cell 120 are in non-bending structures (can be understood as flat structures), and respectively penetrate through the end plate member 112 and then are directly attached to the positive electrode connection surface 131 of the positive electrode terminal 130 and the negative electrode connection surface 141 of the negative electrode terminal 140, so that the probability of occurrence of cracks at the bending positions of the positive electrode tab 121 and the negative electrode tab 122 can be reduced, and the manufacturing yield of the battery module 100 can be improved; the bending procedure in the manufacturing process of the battery module 100 can be omitted, and the manufacturing cost is reduced; it is also possible to avoid the bending structure from affecting the connection between the positive and negative terminals 130 and 140 and the bus bar 400.

In the present utility model, the positive tab 121 and the negative tab 122 of the battery cell 120 of the battery module 100 are electrically connected to the positive terminal 130 and the negative tab 122 in a flat and straight manner, so as to avoid bending, and effectively reduce the occurrence probability of cracks in the positive tab 121 and the negative tab 122, thereby improving the manufacturing yield of the battery module 100.

Referring to fig. 1, the battery module 100 includes two battery cells 120, and the two battery cells 120 are stacked in a second direction perpendicular to the first direction within a case body 111.

The positive electrode lugs 121 of the two electric cores 120 are respectively arranged on two positive electrode connecting surfaces 131 of the positive electrode terminal 130 which are oppositely arranged along the second direction, and the negative electrode lugs 122 of the two electric cores 120 are respectively arranged on two negative electrode connecting surfaces 141 of the negative electrode terminal 140 which are oppositely arranged along the second direction.

It should be noted that, in the spatial coordinates of the lower right corner in fig. 1, the direction of the X axis is the second direction perpendicular to the first direction.

Referring to fig. 1, the battery module 100 further includes a module buffer sheet 150 and a module insulation sheet 160.

The module buffer 150 is disposed between the two cells 120, and the module buffer 150 is used for absorbing expansion of the cells 120.

The module insulating sheet 160 is disposed between the battery cell 120 and the case body 111.

When the material of the case body 111 is metal, the module insulating sheet 160 disposed between the battery cell 120 and the case body 111 can be used for insulation protection between the battery cell 120 and the case body 111.

In some embodiments, positive tab 121 and negative tab 122 are welded to positive terminal 130 and negative terminal 140, respectively.

It is understood that the connection between the positive tab 121 and the positive terminal 130 and the connection between the negative tab 122 and the negative terminal 140 can also be made by other fixing methods, such as bonding or by fixing members, which are not particularly limited herein.

Fig. 4 is an exploded view of the case body 111 of the battery module 100 according to an embodiment of the present utility model. Fig. 5 is a schematic structural view of a battery module 100 according to an embodiment of the present utility model. Fig. 6 is a front view of fig. 5. Referring to fig. 1, 3-6, battery module 100 further includes two oppositely disposed module non-contact surfaces 1112. The module non-contact surface 1112 is disposed to extend in a third direction perpendicular to the first direction and the second direction. At least one blast hole 1114 is provided in the module non-contact surface 1112.

Note that, in fig. 1, the direction of the Z axis is the third direction.

In some embodiments, at least one blast hole 1114 is provided in the module non-contact surface 1112.

Specifically, a plurality of blasting openings 1114 of the same number are uniformly distributed on the non-contact surface 1112 of the two modules.

It should be noted that, the battery module 100 provided with the explosion hole 1114 can lead out the eruption of the battery core 120 when the battery is out of control, and can avoid the eruption from impacting the bus bar 400 and other electrical connection structures, thereby causing more severe chain reaction and causing more serious safety problems.

Referring to fig. 4, the case body 111 includes two sub-cases 1113 symmetrically disposed in the second direction. The sub-housing 1113 includes half of each of the two module non-contact surfaces 1112.

In some embodiments, the sub-shell 1113 also includes a module contact surface 1111. The module contact surface 1111 connects each half of the two module non-contact surfaces 1112. The two module contact surfaces 1111 of the case body 111 are disposed opposite to each other in the second direction.

Fig. 7 is an exploded view of the battery module 10 according to an embodiment of the present utility model. Referring to fig. 7, the battery module 10 includes a module case 200 and a plurality of battery modules 100. The plurality of battery modules 100 are disposed in the module case 200.

The plurality of battery modules 100 are sequentially stacked in a second direction (i.e., a direction of the Y-axis) perpendicular to the first direction in series and/or parallel, and the heat insulating sheet 300 is disposed between the adjacent battery modules 100.

It is understood that whether the connection between the plurality of battery modules 100 is in series or in parallel may be according to the actual situation, and is not particularly limited herein.

In some embodiments, the battery module 100 is fixedly disposed on the inner wall of the module case 200.

The heat insulating sheet 300 can conduct heat after thermal runaway of the battery, and performs a heat insulating function. In some embodiments, the thermal shield 300 may employ thermal insulation cotton.

The positive electrode terminal 130 includes a positive electrode joint surface 132 perpendicular to the first direction, and the negative electrode terminal 140 includes a negative electrode joint surface perpendicular to the first direction, and first connection holes are provided on the positive electrode joint surface 132 and the negative electrode joint surface, respectively.

The battery module 10 further includes at least one bus bar 400. Each of the bus bars 400 is provided with a second connection hole 410.

In some embodiments, the positive electrode joint surface 132 is provided with a first connection hole 133, and the single bus bar 400 is electrically connected to the positive electrode joint surface 132 of the adjacent battery module 100 by passing the fastener 20 through the second connection hole 410 and the first connection hole 133 in sequence.

In other embodiments, the negative electrode joint surface is provided with a first connection hole 143, and a single bus bar is electrically connected to the negative electrode joint surface of an adjacent battery module by passing the fastener 20 through the second connection hole 410 and the first connection hole 143 in sequence.

In other embodiments, the positive electrode joint surface 132 is provided with a first connection hole 133, the negative electrode joint surface is provided with a first connection hole 143, each busbar 400 is symmetrically provided with 4 second connection holes 410, two second connection holes on one side are connected with the first connection hole 133 of the positive electrode joint surface 132 by fasteners, and two second connection holes on the other side are connected with the first connection hole 143 of the negative electrode joint surface by different fasteners to electrically connect a single busbar to the positive electrode joint surface 132 and the negative electrode joint surface of an adjacent battery module.

It will be appreciated that the bus bar 400 and the positive electrode terminal 130, and the bus bar 400 and the negative electrode terminal 140 may be connected by the fastener 20, for example, by using fasteners such as screws or bolts, the detachable fastener 20 may facilitate the disassembly of the battery module 10, so as to facilitate the disassembly of the whole battery pack or the battery module 10 during after-sales maintenance, thereby providing possibility for recycling each component of the battery module 10 and effectively reducing after-sales maintenance cost.

The bus bar 400 is used for connecting adjacent battery modules 100 in series or parallel so as to be able to function as a sink for on-current.

Referring to fig. 11, the end surfaces of the battery cell 120 at both ends in the first direction do not exceed the positive electrode joint surface 132 and the negative electrode joint surface.

It should be noted that, the end surfaces of the two ends of the battery cell 120 along the first direction may also be understood as the end surface facing the busbar 400 after the positive tab 121 is electrically connected to the positive terminal 130. In this embodiment, the end surfaces of the two ends of the battery cell 120 along the first direction do not exceed the positive electrode joint surface 132 and the negative electrode joint surface, so that the connection between the busbar 400 and the positive electrode terminal 130 or the negative electrode terminal 140 can be prevented from being affected by the positive electrode tab 121 or the negative electrode tab 122.

Fig. 8 is an exploded view of a battery module 10 according to another embodiment of the present utility model.

Fig. 9 is an exploded view of a battery module 10 according to another embodiment of the present utility model. Referring to fig. 8 and 9, the module housing 200 includes a module top plate 210. The module top plate 210 is disposed on a side of the module non-contact surface 1112 of the battery module 100 facing away from the battery module 100, and at least one discharge opening 211 is disposed on the module top plate 210, where the discharge opening 211 corresponds to at least one explosion opening 1114.

The discharge port 211 provided in the module housing 110 can be used to further guide out the spray discharged from the blast port 1114.

In some embodiments, the module housing 200 further includes a module bottom plate 230 and a module side plate 220.

The module side plate 220 is used to fixedly mount the battery monitoring sensor 600, the positive electrode integrated member 700, and the negative electrode integrated member 800.

The module bottom plate 230 is used for heat transfer medium.

Referring to fig. 8 and 9, the battery module 10 further includes a module insulation sheet 500. The module insulating sheet 500 is disposed on a side of the module top plate 210 facing away from the battery module 100. The module insulating sheet 500 can prevent dew condensation at the discharge port 211 of the module top plate 210.

Fig. 12 is a schematic structural view of a battery module 10 according to another embodiment of the present utility model. Referring to fig. 8 and 12, the battery module 10 further includes a sampling assembly 900. The sampling assembly 900 is used for connecting each data acquisition point in the battery module 10, and finally is connected with the battery monitoring sensor 600 to form a data acquisition closed loop

The battery module 10 further includes a positive electrode integrated member 700 and a negative electrode integrated member 800. The positive electrode integrated member 700 and the negative electrode integrated member 800 are both used for the electrical connection between the battery modules 10.

The battery module 10 further includes a battery monitoring sensor 600, where the battery monitoring sensor 600 is used for collecting and transmitting data such as voltage and temperature of the battery cell 120 in the battery module 10.

The battery pack includes a battery case and a battery module 100 or a battery module 10 disposed in the battery case. The battery module 100 of the above-described embodiment may be employed as the battery module 100; the battery module 10 of the above embodiment is employed as the battery module 10.

In the description of the present utility model, it should be understood that 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 number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; 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 description of the present utility model, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, or may include both the first and second features not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features 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, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements 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 application of other processes and/or the use of other materials.

In the description of the present specification, reference to the terms "one embodiment," "certain embodiments," "illustrative 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present utility model, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the utility model, and are also considered to be within the scope of the utility model.

Claims (12)

1. A battery module, comprising:

the module shell comprises a shell body and end plate parts which are covered at two ends of the shell body, and the shell body and the end plate parts are surrounded to form an accommodating space; one of the end plate members is provided with a positive electrode terminal at the other side of the accommodation space, and the other end plate member is provided with a negative electrode terminal at the other side of the accommodation space, the positive electrode terminal and the negative electrode terminal being arranged opposite to each other in a first direction;

the battery cell is arranged in the accommodating space, two ends of the battery cell are respectively provided with a positive electrode lug and a negative electrode lug which extend along the first direction, the positive electrode lug is electrically connected with the positive electrode terminal, the negative electrode lug is electrically connected with the negative electrode terminal, and the positive electrode lug and the negative electrode lug are not bent;

the positive terminal comprises a positive connecting surface parallel to the first direction, and the positive lug penetrates through the end plate part and is attached to the positive connecting surface;

the negative terminal includes a negative connection face parallel to the first direction, and the negative tab extends through the end plate member and engages the negative connection face.

2. The battery module according to claim 1, wherein the battery module includes two cells stacked in the case body in a second direction perpendicular to the first direction, positive tabs of the two cells are respectively disposed on two positive connection surfaces of the positive terminal opposite to each other in the second direction, and negative tabs of the two cells are respectively disposed on two negative connection surfaces of the negative terminal opposite to each other in the second direction.

3. The battery module of claim 2, further comprising:

the module buffer sheet is arranged between the two battery cores;

the module insulating sheet is arranged between the battery cell and the shell body.

4. The battery module according to claim 1 or 2, wherein,

the positive electrode lug and the negative electrode lug are respectively welded with the positive electrode terminal and the negative electrode terminal.

5. The battery module of claim 2, further comprising two module non-contact surfaces disposed opposite each other in a third direction perpendicular to the first and second directions, the module non-contact surfaces having at least one blast disposed thereon.

6. The battery module of claim 5, wherein the case body comprises:

and two sub-shells symmetrically arranged along the second direction, wherein each sub-shell comprises half of the non-contact surfaces of the two modules.

7. A battery module, comprising:

a module housing;

a plurality of battery modules according to any one of claims 1 to 6, which are disposed in the module case, and are sequentially stacked in a second direction perpendicular to the first direction by being connected in series and/or in parallel, with a heat insulating sheet disposed between adjacent battery modules.

8. The battery module according to claim 7, wherein the positive electrode terminal includes a positive electrode engaging surface perpendicular to the first direction, the negative electrode terminal includes a negative electrode engaging surface perpendicular to the first direction, and first connection holes are provided on the positive electrode engaging surface and the negative electrode engaging surface, respectively; the battery module further includes:

at least one busbar, each busbar is provided with a second connecting hole, and a fastener sequentially passes through the second connecting hole and the first connecting hole to electrically connect a single busbar to the positive electrode joint surface of an adjacent battery module;

or electrically connecting a single bus bar to the negative electrode joint surface of the adjacent battery module through the second connecting hole and the first connecting hole sequentially by a fastener;

or the single bus bar is electrically connected to the positive electrode joint surface and the negative electrode joint surface of the adjacent battery modules through the second connecting hole and the first connecting hole sequentially by fasteners.

9. The battery module according to claim 8, wherein end surfaces of both ends of the battery cell in the first direction do not exceed the positive electrode engaging surface and the negative electrode engaging surface.

10. The battery module according to claim 7, wherein the module case comprises:

the module top plate is arranged on one side, opposite to the battery module, of the module non-contact surface of the battery module, and is provided with at least one exhaust port corresponding to at least one explosion opening.

11. The battery module of claim 10, further comprising:

the module insulating sheet is arranged on one side of the module top plate, which is opposite to the battery module.

12. A battery pack comprising a battery case and a battery module or a battery module provided in the battery case, characterized in that the battery module employs the battery module according to any one of claims 1 to 6; the battery module employs the battery module according to any one of claims 7 to 11.