CN218586279U

CN218586279U - Electrochemical device and electric equipment

Info

Publication number: CN218586279U
Application number: CN202222969554.5U
Authority: CN
Inventors: 农文彬; 李坤龙; 王鹏飞
Original assignee: Xiamen Xinnengda Technology Co Ltd
Current assignee: Xiamen Xinnengda Technology Co Ltd
Priority date: 2022-11-08
Filing date: 2022-11-08
Publication date: 2023-03-07
Anticipated expiration: 2032-11-08

Abstract

The application discloses electrochemical device and consumer, electrochemical device include the casing, locate first electric core module and the first elastic component in the casing. The first battery cell module comprises a first assembly and a second assembly, the first assembly comprises a plurality of first battery cells stacked along a first direction, and the second assembly comprises a plurality of second battery cells stacked along the first direction. The first elastic assembly is arranged between the first assembly and the second assembly and connected with the first assembly and the second assembly, and the first elastic assembly can elastically deform along a first direction. Among the above-mentioned electrochemical device, elasticity restoring force through on the first elastic component makes a plurality of first electric cores and a plurality of second electric cores press in proper order and support spacingly, can reduce the filler quantity of filling between a plurality of first electric cores and between a plurality of second electric cores to reduce electrochemical device's cost.

Description

Electrochemical device and electric equipment

Technical Field

The application belongs to the technical field of energy storage, and particularly relates to an electrochemical device and electric equipment.

Background

At present, in the electrochemical device that comprises a plurality of electric cores, be provided with more elasticity filling member such as cotton of bubble usually to exert pressure for electric core when electric core inflation, reduce the loss on the electric core performance, and protect electric core, reduce the risk that electric core casing damaged because of wearing and tearing, but, more filling member uses, can increase electrochemical device's cost.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide an electrochemical device capable of reducing the number of internal fillers, thereby reducing the cost.

An embodiment of the present application provides an electrochemical device, includes the casing, locates first battery module and the first elastic component in the casing. The first battery cell module comprises a first assembly and a second assembly, the first assembly and the second assembly are arranged along a first direction, the first assembly comprises a plurality of first battery cells, the first battery cells are stacked along the first direction, the second assembly comprises a plurality of second battery cells, the second battery cells are stacked along the first direction, and the first direction is the thickness direction of the first battery cells and the thickness direction of the second battery cells. The first elastic assembly is arranged between the first assembly and the second assembly and connected with the first assembly and the second assembly, and the first elastic assembly can elastically deform along a first direction.

In the electrochemical device, the first elastic assembly is arranged between the first assembly and the second assembly and connected with the first assembly and the second assembly, the plurality of first battery cells are sequentially compressed for limiting and the plurality of second battery cells are sequentially compressed for limiting through the elastic restoring force of the first elastic assembly, the quantity of fillers filled between the plurality of first battery cells and between the plurality of second battery cells can be reduced, and therefore the cost of the electrochemical device is reduced.

In some embodiments of the present application, the first resilient component comprises any one of a spring, an air bag, and a sheet metal part. Elastic deformation can take place for spring, gasbag and sheet metal component homoenergetic, not only can absorb the inflation extrusion force of first electric core and second electric core through self deformation, can also act on first electric core and second electric core through elastic restoring force, provide the extrusion force for first electric core and second electric core, it is spacing with first electric core and second electric core, and provide reaction force when first electric core and second electric core inflation, reduce the risk of first electric core and second electric core overinflation.

In some embodiments of the present application, the first resilient assembly includes a first flap, a second flap, and a first spring. First baffle is connected in first subassembly, and the second baffle is connected in the second subassembly, and first spring coupling first baffle and second baffle, first spring can follow first direction elastic deformation. First elastic component connects first subassembly, second subassembly and first spring coupling first baffle and second baffle through first baffle, can make the elastic force on the first spring pass through the even effect of first baffle in first subassembly, through the even effect in second subassembly of second baffle, make the even atress of first electric core and second electric core, reduce first electric core and second electric core because of the uneven potential safety hazard that local pressure is too big of atress.

In some embodiments of the present application, the number of the first springs is plural, and the plural first springs are arranged in an arrangement spaced apart in a direction perpendicular to the first direction. First elastic component sets up a plurality of first springs, can improve its extrusion force that acts on first subassembly and second subassembly, and improve its ability of bearing extrusion force on first subassembly and the second subassembly, and a plurality of first springs set up along the interval in the direction of the first direction of perpendicular to, make a plurality of first springs dispersed arrangement, the effort that makes a plurality of first springs act on first baffle and second baffle is the form of equipartition and arranges, can improve the stability of first baffle and second baffle.

In some embodiments of the present application, the first cell includes a first shell, and a projection of the first shell at least partially overlaps a projection of the first baffle along the first direction; and/or the second battery cell comprises a second shell, and the projection of the second shell at least partially overlaps with the projection of the second baffle along the first direction. Along first direction, the projection of first casing and the projection of first baffle at least partially overlap, and/or the projection of second casing and the projection of second baffle at least partially overlap, can make the elastic force on the first spring through the even first casing that acts on of first baffle, and through the even second casing that acts on of second baffle, make the even atress of first electric core and second electric core, reduce first electric core and second electric core because of the uneven too big potential safety hazard of local pressure of atress.

In some embodiments of the application, the first spring is connected with the first baffle and the second baffle in a buckle buckling or gluing mode, so that the connection stability of the first spring in connection with the first baffle and the second baffle can be improved, and the anti-seismic performance of the electrochemical device is improved.

In some embodiments of the present application, the electrochemical device further includes a second cell module and a second elastic assembly, and the second cell module and the first cell module are arranged along a second direction perpendicular to the first direction. The second battery cell module comprises a third assembly and a fourth assembly, the third assembly and the fourth assembly are arranged along the first direction, the third assembly comprises a plurality of third battery cells, the plurality of third battery cells are stacked along the first direction, the fourth assembly comprises a plurality of fourth battery cells, and the plurality of fourth battery cells are stacked along the first direction. The second elastic assembly is arranged between the third assembly and the fourth assembly and connected with the third assembly and the fourth assembly, and the second elastic assembly can elastically deform along the first direction. In the electrochemical device, the second elastic assembly is arranged between the third assembly and the fourth assembly and is connected with the third assembly and the fourth assembly, and the plurality of third battery cells are sequentially pressed to be limited and the plurality of fourth battery cells are sequentially pressed to be limited through the elastic restoring force of the second elastic assembly, so that the quantity of fillers filled between the plurality of third battery cells and between the plurality of fourth battery cells can be reduced, and the cost of the electrochemical device is reduced.

In some embodiments of the present application, the second elastic assembly includes a third flap, a fourth flap, and a second spring. The third baffle is connected to the third subassembly, and the fourth baffle is connected to the fourth subassembly. And the second spring is connected with the third baffle and the fourth baffle and can elastically deform along the first direction. The second elastic assembly is connected with the third assembly through the third baffle, the fourth assembly is connected with the fourth baffle, the second spring is connected with the third baffle and the fourth baffle, elastic force on the second spring can act on the third assembly through the third baffle uniformly, and the elastic force on the second spring acts on the fourth assembly through the fourth baffle uniformly, so that the third battery cell and the fourth battery cell are uniformly stressed, and the potential safety hazard that the local pressure of the third battery cell and the fourth battery cell is too large due to uneven stress is reduced.

In some embodiments of the present application, the first cell further includes a first casing and a first tab, the first tab extends from the first casing, the third cell further includes a third casing and a third tab, the third tab extends from the third casing, and the third tab contacts and is connected to the first tab. The first tab comprises a first elastic section capable of elastically deforming in a first direction. The third tab includes a third elastic segment that is elastically deformable in the first direction. When the at least partial electric core of first subassembly and third subassembly took place the displacement along the first direction, first elastic segment can absorb drag power or extrusion force on the first utmost point ear through elastic deformation, and the third elastic segment can absorb drag power or extrusion force on the third utmost point ear through elastic deformation, reduces the influence of first electric core and third electric core along the relative displacement on the first direction to first utmost point ear and third utmost point ear.

In some embodiments of the present application, the second cell further includes a second casing and a second pole lug, the second pole lug extends out of the second casing, the fourth cell further includes a fourth casing and a fourth pole lug, the fourth pole lug extends out of the fourth casing, and a fourth pole lug contacts and is connected to a second pole lug. The second pole ear comprises a second elastic section which can elastically deform along the first direction. The fourth pole ear includes a fourth elastic segment that is elastically deformable in the first direction. When at least part of electric cores of second subassembly and fourth subassembly took place the displacement along first direction, the second elasticity section can absorb pull power or extrusion force on the second utmost point ear through elastic deformation, and the fourth elasticity section can absorb pull power or extrusion force on the fourth utmost point ear through elastic deformation, reduces the influence of the relative displacement of second electric core and fourth electric core along first direction to second utmost point ear and fourth utmost point ear.

In some embodiments of the present application, the first elastic section is any one of N-shaped, S-shaped, V-shaped, and wavy; the third elastic section is any one of N-shaped, S-shaped, V-shaped and wavy.

In some embodiments of the present application, the second elastic segment is any one of N-shaped, S-shaped, V-shaped, and wavy; the fourth elastic section is any one of N-shaped, S-shaped, V-shaped and wavy.

In some embodiments of the present application, a plurality of the first cells are sequentially arranged in a stack contacting along the first direction; and/or a plurality of second battery cells are sequentially contacted and stacked along the first direction.

In some embodiments of the present application, a plurality of the third cells are sequentially arranged in a stack in contact along the first direction; and/or a plurality of the fourth battery cells are sequentially contacted and stacked along the first direction.

Embodiments of the present application also provide a power consuming apparatus including the electrochemical device according to any one of the above embodiments. In the electric equipment, the first elastic assembly is arranged between the first assembly and the second assembly and is connected with the first assembly and the second assembly, so that the quantity of fillers filled between a plurality of first battery cells and between a plurality of second battery cells can be reduced, the cost of the electrochemical device is reduced, and the cost of the electric equipment is reduced.

Drawings

Fig. 1 is a schematic view of the structure of an electrochemical device in one embodiment of the present application.

Fig. 2 is an exploded view of the electrochemical device shown in fig. 1.

Fig. 3 is a schematic view of the internal structure of the electrochemical device shown in fig. 1.

Fig. 4 is a schematic structural diagram of a first cell in an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a second cell in an embodiment of the present application.

FIG. 6 is a schematic diagram of a first spring assembly in an embodiment of the present application.

Fig. 7 is an exploded view of the first elastic member shown in fig. 6.

Fig. 8 is a schematic structural diagram of a third cell in an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a fourth cell in an embodiment of the present application.

FIG. 10 is a schematic diagram of a second spring assembly in an embodiment of the present application.

Fig. 11 is an exploded view of the second elastic member shown in fig. 10.

Fig. 12 is a schematic structural diagram of a first series unit composed of a first cell and a third cell in one embodiment of the present application.

Fig. 13 is a schematic diagram of the structure of an extended embodiment of the first series unit shown in fig. 12.

Fig. 14 is a schematic diagram of a structure in which two first series units shown in fig. 12 are connected in series.

Fig. 15 is a schematic structural diagram of a second series unit in an embodiment of the present application.

Fig. 16 is a schematic structural view of an extended embodiment of the second series unit shown in fig. 15.

Fig. 17 is a schematic structural diagram of a third series unit composed of a second cell and a fourth cell in one embodiment of the present application.

Fig. 18 is a schematic diagram of the structure of an extended embodiment of the third series unit shown in fig. 17.

Fig. 19 is a schematic diagram of a structure in which two third series units shown in fig. 17 are connected in series.

Fig. 20 is a schematic structural diagram of a fourth series unit in an embodiment of the present application.

Fig. 21 is a schematic diagram of the structure of an extended embodiment of the fourth series unit shown in fig. 20.

Fig. 22 is a partial structural view of the electrochemical device shown in fig. 1.

FIG. 23 is a schematic diagram of an electric device in one embodiment of the present application.

Description of the main elements

Electrochemical device 100

Housing 10

First wall 11

Second wall 12

Third wall 13

Fourth wall 14

Fifth wall 15

First convex portion 151

Second convex portion 152

Third convex part 153

Sixth wall 16

Volume space 17

First battery cell module 20

First component 21

First cell 211

First housing 2111

Main body 21111

Seal edge 21112

Side seal edge 211121

Top seal edge 211122

First tab 2112

First elastic segment 21121

First connection region 21122

Fifth tab 2113

Fifth elastic segment 21131

Fifth connection region 21132

Second component 22

Second cell 221

Second housing 2211

Second tab 2212

Second elastic segment 22121

Second connecting region 22122

Sixth tab 2213

Sixth elastic segment 22131

Sixth connecting area 22132

First elastic component 30

First baffle 31

Second baffle 32

First spring 33

Second cell module 40

Third component 41

Third battery cell 411

Third housing 4111

Third tab 4112

Third resilient segment 41121

Third connection region 41122

Seventh tab 4113

Seventh elastomeric segment 41131

Seventh connection area 41132

Fourth component 42

Fourth cell 421

Fourth shell 4211

Fourth tab 4212

Fourth resilient segment 42121

Fourth connection region 42122

Eighth tab 4213

Eighth elastic segment 42131

Eighth connection region 42132

Second elastic component 50

Third baffle 51

Fourth baffle 52

Second spring 53

First series unit 61

Second series unit 62

Third series unit 63

Fourth series unit 64

First parallel unit 71

Second parallel unit 72

Third parallel unit 73

Fourth parallel unit 74

Total positive tab 81

Total negative tab 82

First connecting member 83

Second connecting member 84

Conductive member 90

Power utilization device 200

First direction X

Second direction Y

Third direction Z

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

An embodiment of the present application provides an electrochemical device, includes the casing, locates first battery module and the first elastic component in the casing. The first battery cell module comprises a first assembly and a second assembly, the first assembly and the second assembly are arranged and arranged along a first direction, the first assembly comprises a plurality of first battery cells, the first battery cells are stacked and arranged along the first direction, the second assembly comprises a plurality of second battery cells, the second battery cells are stacked and arranged along the first direction, and the first direction is the thickness direction of the first battery cells and the thickness direction of the second battery cells. The first elastic assembly is arranged between the first assembly and the second assembly and connected with the first assembly and the second assembly, and the first elastic assembly can elastically deform along the first direction.

Among the above-mentioned electrochemical device, locate first elastic component and connect first subassembly and second subassembly between first subassembly and the second subassembly, elastic restoring force through first elastic component makes a plurality of first electric cores compress tightly in proper order with spacing and make a plurality of second electric cores compress tightly in proper order with spacing, can reduce the filler quantity of filling between a plurality of first electric cores and between a plurality of second electric cores to reduce electrochemical device's cost.

Embodiments of the present application will be further described with reference to the accompanying drawings.

As shown in fig. 1 and 2, an embodiment of the present application provides an electrochemical device 100 including a casing 10, a first cell module 20 disposed in the casing 10, and a first elastic assembly 30. The first battery cell module 20 includes a first assembly 21 and a second assembly 22, the first assembly 21 and the second assembly 22 are arranged along a first direction X, the first assembly 21 includes a plurality of first battery cells 211, the plurality of first battery cells 211 are stacked along the first direction X, the second assembly 22 includes a plurality of second battery cells 221, the plurality of second battery cells 221 are stacked along the first direction X, and the first direction X is a thickness direction of the first battery cells 211 and the second battery cells 221. The first elastic member 30 is disposed between the first member 21 and the second member 22 and connects the first member 21 and the second member 22, and the first elastic member 30 is elastically deformable in the first direction X.

In the electrochemical device 100, the first elastic assembly 30 is disposed between the first assembly 21 and the second assembly 22 and connected to the first assembly 21 and the second assembly 22, and the elastic restoring force of the first elastic assembly 30 enables the plurality of first battery cells 211 to sequentially abut against the limit and the plurality of second battery cells 221 to sequentially abut against the limit, so that the amount of the fillers filled between the plurality of first battery cells 211 and between the plurality of second battery cells 221 can be reduced, and the cost of the electrochemical device 100 can be reduced.

The housing 10 includes a first wall 11, a second wall 12, a third wall 13, a fourth wall 14, a fifth wall 15, and a sixth wall 16, where the first wall 11 and the second wall 12 are disposed opposite to each other along a first direction X, the third wall 13 and the fourth wall 14 are disposed opposite to each other along a second direction Y perpendicular to the first direction X, the fifth wall 15 and the sixth wall 16 are disposed opposite to each other along a third direction Z perpendicular to the first direction X and the second direction Y, the fifth wall 15 and the sixth wall 16 are connected to the first wall 11, the second wall 12, the third wall 13, and the fourth wall 14, and the first wall 11, the second wall 12, the third wall 13, the fourth wall 14, the fifth wall 15, and the sixth wall 16 enclose a cavity space 17 capable of accommodating the first cell module 20 and the first elastic assembly 30. In an embodiment, the second direction Y is a length direction of the first cell 211 and the second cell 221, and the third direction Z is a width direction of the first cell 211 and the second cell 221.

As shown in fig. 2 and 3, in an embodiment, the number of the first cells 211 in the first assembly 21 is eight. In other embodiments, the number of the first battery cells 211 in the first assembly 21 may also be two, three, four, five, six, seven, nine or more.

In one embodiment, the number of the second cells 221 in the second assembly 22 is eight. In other embodiments, the number of the second cells 221 in the second assembly 22 may also be two, three, four, five, six, seven, nine, or more.

As an example, the number of the first battery cells 211 in the first assembly 21 and the number of the second battery cells 221 in the second assembly 22 are eight.

Along the first direction X, the first wall 11 and the second wall 12 are respectively located at two opposite sides of the first cell module 20. In one embodiment, first member 21 is positioned between first wall 11 and first resilient member 30, and second member 22 is positioned between second wall 12 and first resilient member 30. In one embodiment, first member 21 is positioned between second wall 12 and first resilient member 30, and second member 22 is positioned between first wall 11 and first resilient member 30 (not shown).

By way of example, the following further description will be given with the first member 21 positioned between the first wall 11 and the first elastic member 30, and the second member 22 positioned between the second wall 12 and the first elastic member 30.

In an embodiment, along the first direction X, the first cell 211 of the first assembly 21 close to the first wall 11 is directly in contact with the first wall 11. In an embodiment, the electrochemical device 100 further includes a first filler (not shown) disposed between the first assembly 21 and the first wall 11 along the first direction X, wherein the first assembly 21 is indirectly connected to the first wall 11 through the first filler. The first filler can elastically deform, the first filler can play a role in buffering and protection, the impact of the first wall 11 on the first component 21 when the electrochemical device 100 shakes is reduced, the expansion extrusion force of the first component 21 can be absorbed, the extrusion force acting on the first wall 11 when the first component 21 expands is reduced, the influence of the expansion of the first component 21 on the appearance of the housing 10 is reduced, the reaction force is applied to the first component 21, and the risk of excessive expansion of the first component 21 is reduced. Optionally, the first filler includes any one of foam, a spring, an air bag, and a sheet metal part.

In an embodiment, the eight first battery cells 211 in the first assembly 21 are sequentially in contact and stacked along the first direction X. In an embodiment, the electrochemical device 100 further includes a fifth filler (not shown), and the fifth filler is disposed between two adjacent first battery cells 211 and contacts and connects the two first battery cells 211 along the first direction X. Elastic deformation can take place for the fifth filler, and the fifth filler not only can play the effect of buffering protection, reduces two adjacent first electric cores 211 impact each other's influence when electrochemical device 100 rocks, can also absorb the inflation extrusion force of first electric core 211, reduces the influence of first electric core 211 inflation to first subassembly 21 appearance, and exerts reaction force to the first electric core 211 of inflation, reduces the risk of first electric core 211 overexpansion. In an embodiment, the number of the fifth filler is multiple, the fifth filler is disposed between two partially adjacent first battery cells 211, and the two partially adjacent first battery cells 211 are directly connected in a contact manner. Optionally, the fifth filler includes any one of foam, a spring, an air bag, and a sheet metal part.

In an embodiment, along the first direction X, the second cell 221 of the second assembly 22 close to the second wall 12 is directly in contact with the second wall 12. In one embodiment, the electrochemical device 100 further includes a second filler (not shown), the second filler is disposed between the second assembly 22 and the second wall 12 along the first direction X, and the second assembly 22 is indirectly connected to the second wall 12 through the second filler. The second filler can elastically deform, and the second filler can play a role in buffering and protection, reduce the impact of the second wall 12 on the second assembly 22 when the electrochemical device 100 shakes, and also can absorb the expansion extrusion force of the second assembly 22, reduce the extrusion force acting on the second wall 12 when the second assembly 22 expands, reduce the impact of the expansion of the second assembly 22 on the appearance of the housing 10, apply the reaction force to the second assembly 22, and reduce the risk of the excessive expansion of the second assembly 22. Optionally, the second filler includes any one of foam, a spring, an air bag, and a sheet metal part.

In one embodiment, the eight second cells 221 in the second assembly 22 are sequentially in contact with each other in the first direction X. In an embodiment, the electrochemical device 100 further includes a sixth filler (not shown), and the sixth filler is disposed between two adjacent second battery cells 221 along the first direction X and contacts and connects the two second battery cells 221. Elastic deformation can take place for the sixth filler, and the sixth filler not only can play the effect of buffering protection, reduces two adjacent second electricity core 221 impact each other's influence when electrochemical device 100 rocks, can also absorb the inflation extrusion force of second electricity core 221, reduces the influence of second electricity core 221 inflation to second subassembly 22 appearance, and exerts reaction force to expanded second electricity core 221, reduces the risk of second electricity core 221 excessive swelling. In an embodiment, the number of the sixth fillers is multiple, the sixth fillers are disposed between two partially adjacent second battery cells 221, and the two partially adjacent second battery cells 221 are directly connected in a contact manner. Optionally, the sixth filler includes any one of foam, a spring, an air bag, and a sheet metal part.

In an embodiment, the first resilient assembly 30 comprises any one of a spring, an air bag, and a resilient sheet metal member. Elastic deformation can take place for spring, gasbag and sheet metal component homoenergetic, not only can absorb the inflation extrusion force of first electricity core 211 and second electricity core 221 through self deformation, can also act on first electricity core 211 and second electricity core 221 through elastic restoring force, provide the extrusion force for first electricity core 211 and second electricity core 221, and provide reaction force when first electricity core 211 and second electricity core 221 expand, reduce the risk of first electricity core 211 and second electricity core 221 overexpansion.

As shown in fig. 4, in an embodiment, the first cell 211 is a soft-package cell. In other embodiments, the first cell 211 may also be a hard shell cell (not shown).

For convenience of understanding and description, the cells in the present application are further described by taking a soft package cell as an example.

The first cell 211 includes a first case 2111, a first electrode assembly (not shown), a first tab 2112, and a fifth tab 2113, where the first electrode assembly is disposed inside the first case 2111, and the first tab 2112 and the fifth tab 2113 are both connected to the first electrode assembly and extend out of the first case 2111.

One of the first tab 2112 and the fifth tab 2113 is a positive tab, and the other of the first tab 2112 and the fifth tab 2113 is a negative tab. Optionally, the first tab 2112 is a positive tab, and the fifth tab 2113 is a negative tab.

The first electrode assembly includes a positive electrode tab, a negative electrode tab, and a separator (not shown), the separator is disposed between the positive electrode tab and the negative electrode tab, the positive electrode tab, the separator, and the negative electrode tab are wound or stacked to form the first electrode assembly, the first tab 2112 is connected to the positive electrode tab, and the fifth tab 2113 is connected to the negative electrode tab.

In one embodiment, the first housing 2111 includes a body portion 21111 and a sealing portion 21112, the sealing portion 21112 being connected to the body portion 21111 and extending from the body portion 21111, the first electrode assembly being disposed inside the body portion 21111, and a first tab 2112 and a fifth tab 2113 extending from the sealing portion 21112. In one embodiment, the sealing edge portion 21112 includes a side sealing edge 211121 and a top sealing edge 211122 connected to each other, the first tab 2112 and the fifth tab 2113 extend from the top sealing edge 211122, the top sealing edge 211122 is located at the end of the first shell 2111 in the second direction Y, and the side sealing edge 211121 is located at the end of the first shell 2111 in the third direction Z.

In an embodiment, a first tab 2112 and a fifth tab 2113 are respectively located at opposite ends of the main body portion 21111 in the second direction Y. The number of the top sealed edges 211122 is two, the number of the side sealed edges 211121 is two, the two top sealed edges 211122 are respectively located at two opposite sides of the main body portion 21111 along the second direction Y, the two side sealed edges 211121 are respectively located at two opposite sides of the main body portion 21111 along the third direction Z, each top sealed edge 211122 is connected with the two side sealed edges 211121, and the first tab 2112 and the fifth tab 2113 respectively extend out of the two top sealed edges 211122. In other embodiments, the first tab 2112 and the fifth tab 2113 are located on the same side (not shown) of the main body portion 21111 in the second direction Y.

As an example, the following further illustrates that the first tab 2112 and the fifth tab 2113 are respectively located at two opposite ends of the first battery cell 211 along the second direction Y.

As shown in fig. 5, in an embodiment, the second electrical core 221 includes a second housing 2211, a second electrode assembly (not shown), a second tab 2212 and a sixth tab 2213, the second electrode assembly is disposed inside the second housing 2211, and the second tab 2212 and the sixth tab 2213 are connected to the second electrode assembly and protrude from the second housing 2211.

One of second pole tab 2212 and sixth pole tab 2213 is a positive pole tab and the other of second pole tab 2212 and sixth pole tab 2213 is a negative pole tab. Optionally, the second tab 2212 is a positive tab and the sixth tab 2213 is a negative tab.

In an embodiment, the second and

sixth pole ears

2212 and 2213 are respectively located at two opposite ends of the second cell 221 along the second direction Y. In other embodiments, the second and

sixth pole ears

2212 and 2213 are located on the same side (not shown) of the second cell 221 along the second direction Y.

As an example, the following description will take the case that the second pole tab 2212 and the sixth pole tab 2213 are respectively located at two opposite ends of the second electrical core 221 along the second direction Y.

Referring to fig. 3, fig. 6 and fig. 7, in an embodiment, the first elastic assembly 30 includes a first blocking plate 31, a second blocking plate 32 and a first spring 33, the first spring 33 connects the first blocking plate 31 and the second blocking plate 32, and the first spring 33 can elastically deform along the first direction X. One of the first and

second shutters

31 and 32 is attached to the first module 21, and the other of the first and

second shutters

31 and 32 is attached to the second module 22. Along the first direction X, the first spring 33 is in a compressed and deformed state, and the elastic force on the first spring 33 can uniformly act on the first assembly 21 and the second assembly 22 through the first baffle 31 and the second baffle 32, so that the first battery cell 211 and the second battery cell 221 are uniformly stressed, and the potential safety hazard that the local pressure of the first battery cell 211 and the second battery cell 221 is too large due to uneven stress is reduced. Alternatively, the first baffle 31 is attached to the first module 21 and the second baffle 32 is attached to the second module 22.

In an embodiment, when the electrochemical device 100 is not in a charge-discharge cycle, the distance between the first assembly 21 and the second assembly 22 is controlled, so that the first spring 33 is in a compressed and deformed state, and the first spring 33 provides pre-pressure for the first assembly 21 and the second assembly 22, which can improve the stability of the connection between the first assembly 21 and the second assembly 22 and the housing 10, and improve the anti-seismic performance of the electrochemical device 100. In one embodiment, the electrochemical device 100 can also make the first spring 33 in a natural state without pressure and tension by controlling the distance between the first assembly 21 and the second assembly 22 during non-charge and discharge cycles.

In one embodiment, the first spring 33 can compensate for the displacement expansion of the first assembly 21 or the second assembly 22 through its elastic deformation, thereby improving the stability of the internal structure of the electrochemical device 100. Specifically, compared with the filling materials such as foam, the elastic expansion amount and the elastic restoring force of the first spring 33 are larger, and when the first assembly 21 or the second assembly 22 expands and displaces, the first spring 33 can compensate the displacement of the first assembly 21 or the second assembly 22 through elastic expansion and contraction, so that the stability of the first assembly 21 or the second assembly 22 connected with the housing 10 is improved.

In an embodiment, the first baffle 31 has a plate-shaped structure, so that the first baffle 31 can uniformly act on the first assembly 21, and the influence of the concentrated force on the first spring 33 on the first cell 211 is reduced. Optionally, the first baffle 31 is an insulating plate.

In an embodiment, the second barrier 32 has a plate-like structure, so that the second barrier 32 can uniformly act on the second assembly 22, and the influence of the concentrated force on the first spring 33 on the second cell 221 is reduced. Optionally, the second baffle 32 is an insulating plate.

In an embodiment, the number of the first springs 33 is plural, and the plural first springs 33 are arranged in an array at intervals along a direction perpendicular to the first direction X. The first elastic assembly 30 is provided with the plurality of first springs 33, so that the extrusion force of the first elastic assembly on the first assembly 21 and the second assembly 22 can be improved, the capability of the first elastic assembly on bearing the extrusion force of the first assembly 21 and the second assembly 22 can be improved, the plurality of first springs 33 are arranged at intervals in the direction perpendicular to the first direction X, the plurality of first springs 33 are distributed, the acting force of the plurality of first springs 33 on the first baffle 31 and the second baffle 32 is distributed in an evenly distributed mode, and the stability of the first baffle 31 and the second baffle 32 is improved.

In one embodiment, the first springs 33 are arranged in a spaced arrangement along the second direction Y. In one embodiment, the first springs 33 are arranged along the second direction Y and the third direction Z at intervals (not shown). In one embodiment, the number of the first springs 33 is three. In other embodiments, the number of the first springs 33 may also be two, four, five or more.

As an example, the number of the first springs 33 is three, which will be further described below.

In an embodiment, along the first direction X, the projection of the first casing 2111 and the projection of the first baffle 31 are at least partially overlapped, so that the elastic force on the first spring 33 can uniformly act on the first casing 2111 through the first baffle 31, the first battery cell 211 is uniformly stressed, and the potential safety hazard that the local pressure of the first battery cell 211 is too large due to uneven stress is reduced. In an embodiment, along the first direction X, the projection of the second casing 2211 overlaps at least part of the projection of the second baffle 32, so that the elastic force of the first spring 33 can uniformly act on the second casing 2211 through the second baffle 32, the second battery cell 221 is uniformly stressed, and the potential safety hazard that the local pressure of the second battery cell 221 is too large due to nonuniform stress is reduced.

In an embodiment, the first spring 33 is connected to the first baffle 31 and the second baffle 32 by snap-fitting or gluing, so that the connection stability of the first spring 33 connecting the first baffle 31 and the second baffle 32 can be improved, and the anti-seismic performance of the electrochemical device 100 can be improved.

In one embodiment, the elastic coefficient of the first spring 33 is k1, the elastic coefficient k1 can be used to indicate the magnitude of the elastic force generated when the unit amount of deformation occurs in the first spring 33, and the larger the value of k1, the larger the force required or the generated elastic force for the unit amount of deformation of the first spring 33 is. In the first direction X, the thickness of the first battery cell 211 is D1, the thickness of the first assembly 21 is D1, the first assembly 21 includes eight first battery cells 211, so D1=8 × D1, the thickness of the second battery cell 221 is D2, the thickness of the second assembly 22 is D2, and the second assembly 22 includes eight second battery cells 221, so D2=8 × D2.

In one embodiment, when the electrochemical device 100 is not charged and discharged, the initial compression length of the first springs 33 is L1, the initial pre-stress of each first spring 33 is F1, F1= k1 × L1, the initial pre-stress of the first elastic assembly 30 acting on the first assembly 21 and the second assembly 22 is F1, and the first elastic assembly 30 includes three first springs 33, so that F1=3 × F1=3 × k1 × L1.

In one embodiment, at least a portion of the first cell 211 and at least a portion of the second cell 221 swell when the electrochemical device 100 is subjected to multiple charging and discharging operations or external environmental influences.

In the first direction X, it is assumed that the first component 21 has an expansion amount S1 and the second component 22 has an expansion amount S2, the thickness variable of the first component 21 is Δ S1,. Δ S1= D1 × S1=8 × D1 × S1, and the thickness variable of the second component 22 is Δ S2,. Δ S2= D2 × S2=8 × D2 × S2. Optionally, S1 is less than or equal to 15 percent. Optionally, S2 is less than or equal to 15 percent.

The expansion of the first and

second assemblies

21 and 22 compresses the first spring 33 by Δ S1+ Δ S2, the total compression of the first spring 33 after the expansion of the first and

second assemblies

21 and 22 is L1+ Δ S2, the pressing force of the first elastic assembly 30 on the first and

second assemblies

21 and 22 is F2, F2=3 × k1 (L1 + Δ S2) =3 × k1 (L1 +8 × d 1S 1+8 × d2 × S2).

Referring to fig. 2 and fig. 3, the electrochemical device 100 further includes a second battery cell module 40 and a second elastic assembly 50, wherein the second battery cell module 40 and the first battery cell module 20 are arranged along a second direction Y. The second cell module 40 includes a third assembly 41 and a fourth assembly 42, where the third assembly 41 and the fourth assembly 42 are arranged along the first direction X, the third assembly 41 includes a plurality of third cells 411, the plurality of third cells 411 are stacked along the first direction X, the fourth assembly 42 includes a plurality of fourth cells 421, and the plurality of fourth cells 421 are stacked along the first direction X. The second elastic member 50 is disposed between the third member 41 and the fourth member 42 and connects the third member 41 and the fourth member 42, and the second elastic member 50 is elastically deformable in the first direction X. Along first direction X, second elastic component 50 is in the state of being compressed and deformed, and the elastic restoring force on second elastic component 50 can make a plurality of third batteries 411 press in proper order to be spacing, and make a plurality of fourth batteries 421 press in proper order to be spacing, can reduce the filler quantity of filling between a plurality of third batteries 411 and between a plurality of fourth batteries 421 to reduce electrochemical device 100's cost.

In one embodiment, third element 41 is positioned between first wall 11 and second resilient element 50, and fourth element 42 is positioned between second wall 12 and second resilient element 50. In one embodiment, third element 41 is positioned between second wall 12 and second resilient element 50, and fourth element 42 is positioned between first wall 11 and second resilient element 50 (not shown). As an example, the third component 41 is located between the first wall 11 and the second elastic component 50, and the fourth component 42 is located between the second wall 12 and the second elastic component 50.

In an embodiment, along the first direction X, the third cell 411 of the third assembly 41 close to the first wall 11 directly contacts and connects to the first wall 11. In an embodiment, the electrochemical device 100 further includes a third filler (not shown), and the third filler is disposed between the third component 41 and the first wall 11 along the first direction X, and the third component 41 is indirectly connected to the first wall 11 through the third filler. Elastic deformation can take place for the third filler, and the third filler not only can play the effect of buffering protection, reduces the influence that first wall 11 impacted third subassembly 41 when electrochemical device 100 rocked, can also absorb the inflation extrusion force of third subassembly 41, act on the extrusion force of first wall 11 when reducing third subassembly 41 inflation, reduce the influence of third subassembly 41 inflation to the casing 10 appearance, and provide reaction force when third subassembly 41 inflation, reduce the risk of third subassembly 41 overexpansion. Optionally, the third filler includes any one of foam, a spring, an air bag, and a sheet metal part.

In an embodiment, eight third battery cells 411 in the third assembly 41 are sequentially in contact and stacked along the first direction X. In an embodiment, the electrochemical device 100 further includes a seventh filler (not shown), and the seventh filler is disposed between two adjacent third battery cells 411 along the first direction X and contacts and connects the two third battery cells 411. Elastic deformation can take place for the seventh filler, and the seventh filler not only can play the effect of buffering protection, reduces the influence that two adjacent third electric cores 411 strike each other when electrochemical device 100 rocks, can also absorb the inflation extrusion force of third electric core 411, reduces the influence of third electric core 411 inflation to third subassembly 41 appearance, and exerts reaction force to inflated third electric core 411, reduces the risk of third electric core 411 overexpansion. In an embodiment, the number of the seventh fillers is multiple, the seventh fillers are disposed between two partially adjacent third battery cells 411, and the two partially adjacent third battery cells 411 are directly connected in a contact manner. Optionally, the seventh filler includes any one of foam, a spring, an air bag, and a sheet metal part.

In an embodiment, along the first direction X, the fourth cell 421 of the fourth assembly 42 close to the second wall 12 is directly contacted and connected to the second wall 12. In an embodiment, the electrochemical device 100 further includes a fourth filler (not shown), the fourth filler is disposed between the fourth component 42 and the second wall 12 along the first direction X, and the fourth component 42 is indirectly connected to the second wall 12 through the fourth filler. The fourth filler can elastically deform, and not only can play a role of buffering and protection, reducing the impact of the second wall 12 on the fourth component 42 when the electrochemical device 100 shakes, but also can absorb the expansion extrusion force of the fourth component 42, reducing the extrusion force acting on the second wall 12 when the fourth component 42 expands, reducing the influence of the expansion of the fourth component 42 on the appearance of the housing 10, providing a reaction force when the fourth component 42 expands, and reducing the risk of over-expansion of the fourth component 42. Optionally, the fourth filler includes any one of foam, a spring, an air bag and a sheet metal part.

In one embodiment, eight fourth cells 421 in the fourth assembly 42 are sequentially contacted and stacked along the first direction X. In an embodiment, the electrochemical device 100 further includes an eighth filler (not shown), and the eighth filler is disposed between two adjacent fourth battery cells 421 along the first direction X and contacts and connects the two fourth battery cells 421. Elastic deformation can take place for the eighth filler, and the eighth filler not only can play the effect of buffering protection, reduces two adjacent fourth electricity core 421 impact's when electrochemical device 100 rocks influence each other, can also absorb the inflation extrusion force of fourth electricity core 421, reduces the influence of fourth electricity core 421 inflation to fourth subassembly 42 appearance, and exerts reaction force to expanded fourth electricity core 421, reduces the risk of fourth electricity core 421 overexpansion. In an embodiment, the number of the eighth fillers is multiple, the eighth filler is disposed between two partially adjacent fourth battery cells 421, and the two partially adjacent fourth battery cells 421 are directly connected in a contact manner. Optionally, the eighth filler includes any one of foam, a spring, an air bag, and a sheet metal part.

In an embodiment, the second elastic assembly 50 includes any one of a spring, an air bag, and an elastic sheet metal member. Elastic deformation can occur to spring, gasbag and sheet metal component homoenergetic, not only can absorb the inflation extrusion force of third electric core 411 and fourth electric core 421 through self deformation, can also act on third electric core 411 and fourth electric core 421 through elastic restoring force, provide the extrusion force for third electric core 411 and fourth electric core 421.

As shown in fig. 8, in an embodiment, the third cell 411 includes a third casing 4111, a third electrode assembly (not shown), a third electrode tab 4112, and a seventh electrode tab 4113, wherein the third electrode assembly is disposed inside the third casing 4111, and the third electrode tab 4112 and the seventh electrode tab 4113 are both connected to the third electrode assembly and protrude from the third casing 4111.

One of third tab 4112 and seventh tab 4113 is a positive tab, and the other of third tab 4112 and seventh tab 4113 is a negative tab. Optionally, the third tab 4112 is a negative tab, and the seventh tab 4113 is a positive tab.

In an embodiment, a third tab 4112 and a seventh tab 4113 are respectively located at two opposite ends of the third electrical core 411 along the second direction Y. In other embodiments, the third tab 4112 and the seventh tab 4113 are located on the same side of the third cell 411 along the second direction Y (not shown).

As an example, the following description further takes the case that the third tab 4112 and the seventh tab 4113 are respectively located at two opposite ends of the third battery cell 411 along the second direction Y.

As shown in fig. 9, in an embodiment, the fourth battery cell 421 includes a fourth casing 4211, a fourth electrode assembly (not shown), a fourth tab 4212 and an eighth tab 4213, the fourth electrode assembly is disposed inside the fourth casing 4211, and the fourth tab 4212 and the eighth tab 4213 are both connected to the fourth electrode assembly and extend out of the fourth casing 4211.

One of fourth pole tab 4212 and eighth pole tab 4213 is a positive pole tab and the other of fourth pole tab 4212 and eighth pole tab 4213 is a negative pole tab. Optionally, fourth tab 4212 is a negative tab and eighth tab 4213 is a positive tab.

In an embodiment, fourth pole ear 4212 and eighth pole ear 4213 are respectively located at two opposite ends of fourth electric core 421 along second direction Y. In other embodiments, fourth pole ear 4212 and eighth pole ear 4213 are located on the same side of fourth cell 421 in second direction Y (not shown).

As an example, the following description will take the fourth pole ear 4212 and the eighth pole ear 4213 as examples, where the fourth pole ear 4212 and the eighth pole ear 4213 are respectively located at two opposite ends of the fourth electric core 421 along the second direction Y.

Referring to fig. 3, 10 and 11, in an embodiment, the second elastic assembly 50 includes a third baffle 51, a fourth baffle 52 and a second spring 53, the second spring 53 connects the third baffle 51 and the fourth baffle 52, and the second spring 53 can elastically deform along the first direction X. One of the third and

fourth shutters

51 and 52 is attached to the third assembly 41, and the other of the third and

fourth shutters

51 and 52 is attached to the fourth assembly 42. Along the first direction X, the second spring 53 is in a compressed and deformed state, and an elastic force of the second spring 53 can uniformly act on the third assembly 41 and the fourth assembly 42 through the third baffle 51 and the fourth baffle 52, so that the third cell 411 and the fourth cell 421 are uniformly stressed, and a potential safety hazard that local pressure of the third cell 411 and the fourth cell 421 is too high due to nonuniform stress is reduced. Alternatively, a third baffle 51 is attached to the third assembly 41 and a fourth baffle 52 is attached to the fourth assembly 42.

In an embodiment, when the electrochemical device 100 is not in charge-discharge cycles, the distance between the third assembly 41 and the fourth assembly 42 is controlled, so that the second spring 53 is in a compressed and deformed state, and the second spring 53 provides pre-pressure for the third assembly 41 and the fourth assembly 42, which can improve the stability of the connection between the third assembly 41 and the fourth assembly 42 and improve the anti-seismic performance of the electrochemical device 100. In one embodiment, the electrochemical device 100 can also make the second spring 53 in a natural state free from pressure and tension by controlling the distance between the third assembly 41 and the fourth assembly 42 when not being charged and discharged.

In one embodiment, the second spring 53 can compensate for the expansion displacement of the third component 41 or the fourth component 42 through its elastic deformation, thereby improving the stability of the internal structure of the electrochemical device 100. Specifically, compared with the filling materials such as foam, the elastic expansion amount and the elastic restoring force of the second spring 53 are larger, and when the third assembly 41 or the fourth assembly 42 expands and displaces, the second spring 53 can compensate the displacement of the third assembly 41 or the fourth assembly 42 through elastic expansion and contraction, so that the stability of the connection of the third assembly 41 or the fourth assembly 42 with the housing 10 is improved.

In an embodiment, the third baffle 51 has a plate-shaped structure, so that the third baffle 51 can uniformly act on the third assembly 41, and the influence of the concentrated force on the second spring 53 on the third battery cell 411 is reduced. Optionally, the third baffle 51 is an insulating plate.

In an embodiment, the fourth blocking plate 52 has a plate-shaped structure, so that the fourth blocking plate 52 can uniformly act on the fourth assembly 42, and the influence of the concentrated force on the second spring 53 on the fourth battery cell 421 is reduced. Optionally, the fourth baffle 52 is an insulating plate.

In one embodiment, the number of the second springs 53 is plural, and the plural second springs 53 are arranged in an array at intervals in a direction perpendicular to the first direction X. The second elastic assembly 50 is provided with a plurality of second springs 53, which can improve the extrusion force acting on the third assembly 41 and the fourth assembly 42 and the capability of bearing the extrusion force on the third assembly 41 and the fourth assembly 42, and the plurality of second springs 53 are arranged at intervals along the direction perpendicular to the first direction X, so that the plurality of second springs 53 are distributed, the acting force of the plurality of second springs 53 acting on the third baffle 51 and the fourth baffle 52 is arranged in an even distribution manner, and the stability of the third baffle 51 and the fourth baffle 52 is improved.

In one embodiment, the plurality of second springs 53 are arranged in an array at intervals along the second direction Y. In an embodiment, the second springs 53 are arranged along the second direction Y and the third direction Z at intervals (not shown). In one embodiment, the number of the second springs 53 is three. In other embodiments, the number of the second springs 53 may also be two, four, five or more.

As an example, the number of the second springs 53 is three, and the following description will be further made.

In an embodiment, along the first direction X, the projection of the third housing 4111 overlaps with the projection of the third baffle 51 at least partially, so that the elastic force of the second spring 53 can act on the third housing 4111 through the third baffle 51 uniformly, the third battery cell 411 is uniformly stressed, and the potential safety hazard that the local pressure of the third battery cell 411 is too large due to uneven stress is reduced. In an embodiment, along the first direction X, the projection of the fourth shell 4211 overlaps at least part of the projection of the fourth baffle 52, so that the elastic force of the second spring 53 can uniformly act on the fourth shell 4211 through the fourth baffle 52, the fourth battery cell 421 is uniformly stressed, and the potential safety hazard that the local pressure of the fourth battery cell 421 is too high due to nonuniform stress is reduced.

In an embodiment, the second spring 53 is connected to the third baffle 51 and the fourth baffle 52 by means of snap-fit or adhesive, so that the connection stability of the second spring 53 connecting the third baffle 51 and the fourth baffle 52 can be improved, and the anti-seismic performance of the electrochemical device 100 can be improved.

Referring to fig. 2 and 3, along the second direction Y, the first component 21 is disposed opposite to the third component 41, and the second component 22 is disposed opposite to the fourth component 42.

In an embodiment, the number of the third cells 411 in the third assembly 41 is equal to and corresponds to the number of the first cells 211 in the first assembly 21. In other embodiments, the number of the third battery cells 411 in the third assembly 41 may also be different from the number of the first battery cells 211 in the first assembly 21 (not shown).

In one embodiment, the number of the fourth cells 421 in the fourth assembly 42 is equal to and corresponds to the number of the second cells 221 in the second assembly 22. In other embodiments, the number of the fourth cells 421 in the fourth assembly 42 may be different from the number of the second cells 221 in the second assembly 22 (not shown).

As an example, the number of the third cells 411 in the third assembly 41 is equal to and corresponds to the number of the first cells 211 in the first assembly 21, and the number of the fourth cells 421 in the fourth assembly 42 is equal to and corresponds to the number of the second cells 221 in the second assembly 22.

In an embodiment, the first cell 211 and the third cell 411 opposite to each other along the second direction Y are connected in series. In other embodiments, the first cell 211 and the third cell 411 opposite to each other along the second direction Y are connected in parallel (not shown).

In one embodiment, the second cell 221 and the fourth cell 421 are connected in series and are opposite to each other along the second direction Y. In other embodiments, the second cell 221 and the fourth cell 421 which are opposite along the second direction Y are connected in parallel (not shown).

As an example, the connection of the first cell 211 and the third cell 411 in series, which are opposite to each other in the second direction Y, and the connection of the second cell 221 and the fourth cell 421 in series, which are opposite to each other in the second direction Y, are further described below.

As shown in fig. 12, the connection of one first cell 211 in series with one third cell 411, the first cell 211 and the third cell 411 connected to each other in the second direction Y form a first series unit 61, and the first assembly 21 and the third assembly 41 form eight first series units 61.

In an embodiment, the first tab 2112 in the first cell 211 is connected to the third tab 4112 in the third cell 411.

In an embodiment, the first tab 2112 includes a first elastic section 21121 and a first connection region 21122 which are connected to each other, the first elastic section 21121 protrudes from the first housing 2111 and can be elastically deformed along the first direction X, and the first connection region 21122 is used for connecting the third tab 4112. When the first cell 211 and the third cell 411 in the same first series unit 61 generate relative displacement along the first direction X, the first elastic segment 21121 can absorb a pulling force or a pressing force on the first tab 2112 through elastic deformation, so as to reduce the influence of the relative displacement of the first cell 211 and the third cell 411 along the first direction X on the pulling or pressing of the first tab 2112 and the third tab 4112.

In an embodiment, the first elastic segment 21121 is also elastically deformable in the second direction Y. When relative displacement occurs between the first cell 211 and the third cell 411 in the same first series unit 61 along the second direction Y, the first elastic segment 21121 can absorb a pulling force or a pressing force on the first tab 2112 through elastic deformation, so as to reduce an influence of the relative displacement between the first cell 211 and the third cell 411 along the second direction Y on the pulling or pressing of the first tab 2112 and the third tab 4112.

In one embodiment, the first resilient section 21121 has any one of an N-shape, an S-shape, a V-shape, and a wave shape.

In an embodiment, the third tab 4112 includes a third resilient segment 41121 and a third connection region 41122, the third resilient segment 41121 protrudes from the third housing 4111 and is capable of resilient deformation along the first direction X, and the third connection region 41122 is used for connecting the first tab 2112. When the first cell 211 and the third cell 411 in the same first series unit 61 generate relative displacement along the first direction X, the third elastic segment 41121 can absorb a pulling force or a pressing force on the third tab 4112 through elastic deformation, so as to reduce an influence of the relative displacement of the first cell 211 and the third cell 411 along the first direction X on the pulling or pressing of the first tab 2112 and the third tab 4112.

In an embodiment, the third elastic segment 41121 is also capable of elastic deformation along the second direction Y. When the first cell 211 and the third cell 411 in the same first series unit 61 generate relative displacement along the second direction Y, the third elastic segment 41121 can absorb a pulling force or a pressing force on the third tab 4112 through elastic deformation, so as to reduce the influence of the relative displacement of the first cell 211 and the third cell 411 along the second direction Y on the pulling or pressing of the first tab 2112 and the third tab 4112.

In one embodiment, the third resilient segment 41121 has any one of an N-shape, an S-shape, a V-shape, and a wave shape.

As shown in fig. 13, in an embodiment, a fifth tab 2113 in the first cell 211 is connected to a seventh tab 4113 in the third cell 411.

In an embodiment, the fifth tab 2113 includes a fifth elastic segment 21131 and a fifth connection region 21132 which are connected with each other, the fifth elastic segment 21131 protrudes out of the first housing 2111 and can be elastically deformed along the first direction X, and the fifth connection region 21132 is used for connecting the seventh tab 4113. When the first cell 211 and the third cell 411 in the same first series unit 61 generate relative displacement along the first direction X, the fifth elastic segment 21131 can absorb a pulling force or a pressing force on the fifth tab 2113 through elastic deformation, so as to reduce an influence of the relative displacement of the first cell 211 and the third cell 411 along the first direction X on the pulling or pressing of the fifth tab 2113 and the seventh tab 4113.

In an embodiment, the fifth elastic segment 21131 is also capable of elastic deformation along the second direction Y. When the first cell 211 and the third cell 411 in the same first series unit 61 generate relative displacement along the second direction Y, the fifth elastic segment 21131 can absorb a pulling force or a pressing force on the fifth tab 2113 through elastic deformation, so as to reduce the influence of the relative displacement of the first cell 211 and the third cell 411 along the second direction Y on the pulling or pressing of the fifth tab 2113 and the seventh tab 4113.

In one embodiment, the fifth elastic section 21131 has any one of an N-shape, an S-shape, a V-shape, and a wave shape.

In an embodiment, the seventh tab 4113 includes a seventh elastic segment 41131 and a seventh connection region 41132 connected to each other, the seventh elastic segment 41131 protrudes out of the third housing 4111 and can elastically deform along the first direction X, and the seventh connection region 41132 is used for connecting the fifth tab 2113. When the first cell 211 and the third cell 411 in the same first series unit 61 generate relative displacement along the first direction X, the seventh elastic segment 41131 can absorb a pulling force or a pressing force on the seventh tab 4113 through elastic deformation, so as to reduce the influence of the relative displacement of the first cell 211 and the third cell 411 along the first direction X on the pulling or pressing of the fifth tab 2113 and the seventh tab 4113.

In an embodiment, the seventh elastic segment 41131 is further capable of being elastically deformed along the second direction Y. When the first cell 211 and the third cell 411 in the same first series unit 61 generate relative displacement along the second direction Y, the seventh elastic segment 41131 can absorb a pulling force or a pressing force on the seventh tab 4113 through elastic deformation, so as to reduce the influence of the relative displacement of the first cell 211 and the third cell 411 along the second direction Y on the pulling or pressing of the fifth tab 2113 and the seventh tab 4113.

In one embodiment, the seventh resilient section 41131 has any one of an N-shape, an S-shape, a V-shape and a wave shape.

In one embodiment, eight first series units 61 are connected in series in sequence, so that the first module 21 and the third module 41 form a series module. In other embodiments, eight first series units 61 are connected in parallel, such that first module 21 and third module 41 form a parallel module. As an example, the following description will further take the example of the connection of eight first series units 61 in series in sequence.

As shown in fig. 14, taking two adjacent first series units 61 as an example, the two adjacent first series units 61 are stacked and electrically connected along the first direction X. In one of the first series units 61, the first tab 2112 is connected to the third tab 4112, and in the other first series unit 61, the fifth tab 2113 is connected to the seventh tab 4113.

In an embodiment, two adjacent first battery cells 211 are connected in series by connecting the first tab 2112 and the fifth tab 2113, so that two adjacent first series units 61 are connected in series. When two adjacent first series units 61 are relatively displaced along the first direction X, the first elastic segment 21121 can absorb a pulling force or a pressing force on the first tab 2112 through elastic deformation, and the fifth elastic segment 21131 can absorb a pulling force or a pressing force on the fifth tab 2113 through elastic deformation, so that the influence of the relative displacement of the two adjacent first series units 61 along the first direction X on the pulling or pressing of the first tab 2112 and the fifth tab 2113 connected with each other is reduced.

In an embodiment, two adjacent third battery cells 411 are connected in series by connecting the third tab 4112 with the seventh tab 4113 (not shown), so that two adjacent first series units 61 are connected in series. When two adjacent first series units 61 are relatively displaced along the first direction X, the third elastic segment 41121 can absorb a pulling or pressing force on the third tab 4112 through elastic deformation, and the seventh elastic segment 41131 can absorb a pulling or pressing force on the seventh tab 4113 through elastic deformation, so as to reduce the influence of the relative displacement of the two adjacent first series units 61 along the first direction X on the pulling or pressing of the mutually connected third tab 4112 and seventh tab 4113.

As shown in fig. 3 and 15, in an embodiment, two adjacent first battery cells 211 are connected in parallel to form a first parallel unit 71, and the first assembly 21 forms four first parallel units 71 arranged along the first direction X. In one first parallel unit 71, two first housings 2111 are stacked in the first direction X, two first tabs 2112 are opposed and connected, and two fifth tabs 2113 are opposed and connected. When two first battery cells 211 in the first parallel unit 71 generate relative displacement along the first direction X, the first elastic segment 21121 can absorb the pulling force or the extrusion force on the first tab 2112 through elastic deformation, and the fifth elastic segment 21131 can absorb the pulling force or the extrusion force on the fifth tab 2113 through elastic deformation, so that the influence of the relative displacement of the two adjacent first battery cells 211 along the first direction X on the pulling or the extrusion of the two first tabs 2112 connected with each other and the influence of the pulling or the extrusion of the two fifth tabs 2113 connected with each other are reduced.

In other embodiments, the number of the first cells 211 in the first parallel unit 71 may also be three, four, or more. As an example, the number of the first cells 211 in the first parallel unit 71 is two, which is further described below.

In an embodiment, two adjacent third battery cells 411 are connected in parallel to form a third parallel unit 73, and the third assembly 41 forms four third parallel units 73 arranged along the first direction X. In one third parallel unit 73, two third housings 4111 are stacked, two third tabs 4112 are opposite and connected, and two seventh tabs 4113 are opposite and connected along the first direction X. When two third cells 411 in the first parallel unit 71 generate relative displacement along the first direction X, the third elastic segment 41121 can absorb pulling force or extrusion force on the third tab 4112 through elastic deformation, the seventh elastic segment 41131 can absorb pulling force or extrusion force on the seventh tab 4113 through elastic deformation, the influence of the relative displacement of the two adjacent third cells 411 along the first direction X on pulling or extruding the two mutually connected third tabs 4112 is reduced, and the influence of pulling or extruding the two mutually connected seventh tabs 4113 is reduced.

In other embodiments, the number of the third battery cells 411 in the third parallel unit 73 may also be three, four or more. As an example, the number of the third battery cells 411 in the third parallel unit 73 is two, which is further described below.

One first parallel unit 71 is opposite to and electrically connected to one third parallel unit 73 in the second direction Y. In one embodiment, the first parallel unit 71 and the third parallel unit 73 are connected in series, which are opposite in the second direction Y. In other embodiments, the first parallel unit 71 and the third parallel unit 73 opposite in the second direction Y are connected in parallel (not shown). As an example, the following further explains a connection of the first parallel unit 71 and the third parallel unit 73 in series, which are opposed to each other in the second direction Y.

The first parallel unit 71 and the third parallel unit 73 connected in series form one second series unit 62, the first module 21 and the third module 41 form four second series units 62, and the four second series units 62 are sequentially stacked in the first direction X.

In an embodiment, in the same second series unit 62, the first tab 2112 of the first parallel unit 71 is connected with the third tab 4112 of the third parallel unit 73. When the first parallel unit 71 and the third parallel unit 73 are relatively displaced along the first direction X, the first elastic segment 21121 can absorb the pulling force or the pressing force on the first tab 2112 through elastic deformation, and the third elastic segment 41121 can absorb the pulling force or the pressing force on the third tab 4112 through elastic deformation, so that the influence of the relative displacement of the first parallel unit 71 and the third parallel unit 73 along the first direction X on the pulling or pressing of the first tab 2112 and the third tab 4112 is reduced.

As shown in fig. 16, in one embodiment, in the same second series unit 62, the fifth tab 2113 of the first parallel unit 71 is connected with the seventh tab 4113 of the third parallel unit 73. When the first parallel unit 71 and the third parallel unit 73 are relatively displaced along the first direction X, the fifth elastic segment 21131 can absorb the pulling force or the pressing force on the fifth tab 2113 through elastic deformation, and the seventh elastic segment 41131 can absorb the pulling force or the pressing force on the seventh tab 4113 through elastic deformation, so that the influence of the relative displacement of the first parallel unit 71 and the third parallel unit 73 along the first direction X on the pulling or pressing of the fifth tab 2113 and the seventh tab 4113 is reduced.

As shown in fig. 17, the connection of one second cell 221 in series with one fourth cell 421, the second cell 221 and the fourth cell 421 connected to each other in the second direction Y form a third series unit 63, and the second assembly 22 and the fourth assembly 42 form eight third series units 63.

In an embodiment, the second pole tab 2212 in the second cell 221 is connected to the fourth pole tab 4212 in the fourth cell 421.

In one embodiment, the second tab 2212 comprises a second elastic segment 22121 and a second connecting region 22122 connected with each other, the second elastic segment 22121 extends out of the second housing 2211 and can be elastically deformed along the first direction X, and the second connecting region 22122 is used for connecting the fourth tab 4212. When the second cell 221 and the fourth cell 421 in the same third series unit 63 are displaced relatively along the first direction X, the second elastic segment 22121 can absorb a pulling force or a pressing force on the second pole tab 2212 through elastic deformation, so as to reduce the influence of the relative displacement of the second cell 221 and the fourth cell 421 along the first direction X on the pulling or pressing of the second pole tab 2212 and the fourth pole tab 4212.

In an embodiment, the second elastic segment 22121 can also be elastically deformable along the second direction Y. When the second cell 221 and the fourth cell 421 in the same third series unit 63 are displaced relatively in the second direction Y, the second elastic segment 22121 can absorb a pulling force or a pressing force on the second pole ear 2212 through elastic deformation, so as to reduce the influence of the relative displacement of the second cell 221 and the fourth cell 421 in the second direction Y on the pulling or pressing of the second pole ear 2212 and the fourth pole ear 4212.

In one embodiment, the second elastic section 22121 has any one of an N-shape, an S-shape, a V-shape, and a wave shape.

In an embodiment, the fourth electrode tab 4212 comprises a fourth elastic segment 42121 and a fourth connection region 42122 connected to each other, the fourth elastic segment 42121 extends from the fourth housing 4211 and is elastically deformable along the first direction X, and the fourth connection region 42122 is used for connecting the second electrode tab 2212. When the second cell 221 and the fourth cell 421 in the same third series unit 63 are displaced relatively along the first direction X, the fourth elastic segment 42121 can absorb a pulling force or a pressing force on the fourth tab 4212 through elastic deformation, so as to reduce the influence of the relative displacement of the second cell 221 and the fourth cell 421 along the first direction X on the pulling or pressing of the second tab 2212 and the fourth tab 4212.

In an embodiment, the fourth elastic segment 42121 is also elastically deformable along the second direction Y. When the second cell 221 and the fourth cell 421 in the same third series unit 63 are displaced relatively in the second direction Y, the fourth elastic segment 42121 can absorb a pulling force or a pressing force on the fourth tab 4212 through elastic deformation, so as to reduce the influence of the relative displacement of the second cell 221 and the fourth cell 421 in the second direction Y on the pulling or pressing of the second tab 2212 and the fourth tab 4212.

In one embodiment, the fourth elastic segment 42121 has any one of an N-shape, an S-shape, a V-shape, and a wave shape.

As shown in fig. 18, in an embodiment, the sixth pole tab 2213 in the second cell 221 is connected to the eighth pole tab 4213 in the fourth cell 421.

In one embodiment, the sixth pole tab 2213 comprises a sixth elastic segment 22131 and a sixth connecting region 22132 connected to each other, the sixth elastic segment 22131 extends out of the second housing 2211 and can be elastically deformed along the first direction X, and the sixth connecting region 22132 is used for connecting the eighth pole tab 4213. When the second cell 221 and the fourth cell 421 in the same third series unit 63 are displaced relatively in the first direction X, the sixth elastic segment 22131 can absorb a pulling force or a pressing force on the sixth pole tab 2213 through elastic deformation, so as to reduce the influence of the relative displacement of the second cell 221 and the fourth cell 421 in the first direction X on the pulling or pressing of the sixth pole tab 2213 and the eighth pole tab 4213.

In an embodiment, the sixth elastic segment 22131 can also be elastically deformed along the second direction Y. When the second cell 221 and the fourth cell 421 in the same third series unit 63 are displaced relatively in the second direction Y, the sixth elastic segment 22131 can absorb a pulling force or a pressing force on the sixth pole tab 2213 through elastic deformation, so as to reduce the influence of the relative displacement of the second cell 221 and the fourth cell 421 in the second direction Y on the pulling or pressing of the sixth pole tab 2213 and the eighth pole tab 4213.

In one embodiment, the sixth elastic section 22131 has any one of an N-shape, an S-shape, a V-shape and a wave shape.

In an embodiment, the eighth pole ear 4213 comprises an eighth elastic segment 42131 and an eighth connection region 42132 connected with each other, the eighth elastic segment 42131 extends out of the fourth shell 4211 and can be elastically deformed along the first direction X, and the eighth connection region 42132 is used for connecting the sixth pole ear 2213. When the second cell 221 and the fourth cell 421 in the same third series unit 63 are displaced relatively in the first direction X, the eighth elastic segment 42131 can absorb a pulling force or a pressing force on the eighth pole ear 4213 through elastic deformation, so as to reduce an influence of the relative displacement of the second cell 221 and the fourth cell 421 in the first direction X on the pulling or pressing of the sixth pole ear 2213 and the eighth pole ear 4213.

In an embodiment, the eighth elastic segment 42131 is also elastically deformable along the second direction Y. When the second cell 221 and the fourth cell 421 in the same third series unit 63 are displaced relatively in the second direction Y, the eighth elastic segment 42131 can absorb a pulling force or a pressing force on the eighth tab 4213 through elastic deformation, so as to reduce the influence of the relative displacement of the second cell 221 and the fourth cell 421 in the second direction Y on the pulling or pressing of the sixth tab 2213 and the eighth tab 4213.

In one embodiment, the eighth elastic segment 42131 has any one of an N-shape, an S-shape, a V-shape and a wave shape.

In one embodiment, eight third serial units 63 are serially connected in sequence, so that the second module 22 and the fourth module 42 form a serial module. In other embodiments, eight third series units 63 are connected in parallel, such that the second module 22 and the fourth module 42 form a parallel module. As an example, the following description will be further made by taking an example of the serial connection of eight third serial units 63 in sequence.

As shown in fig. 19, taking two adjacent third series units 63 as an example, the two adjacent third series units 63 are stacked and electrically connected in the first direction X. Of these, in one third series unit 63, second pole tab 2212 is connected to fourth pole tab 4212, and in the other third series unit 63, sixth pole tab 2213 is connected to eighth pole tab 4213.

In an embodiment, two adjacent second battery cells 221 are connected in series by connecting the second tab 2212 with the sixth tab 2213, so that two adjacent third series units 63 are connected in series. When two adjacent third serial-connection units 63 are relatively displaced along the first direction X, the second elastic segment 22121 can absorb a pulling force or a pressing force on the second pole ear 2212 through elastic deformation, and the sixth elastic segment 22131 can absorb a pulling force or a pressing force on the sixth pole ear 2213 through elastic deformation, so as to reduce the influence of the relative displacement of the two adjacent third serial-connection units 63 along the first direction X on the pulling or pressing of the second pole ear 2212 and the sixth pole ear 2213 connected to each other.

In an embodiment, two adjacent fourth battery cells 421 are connected in series by connecting the fourth tab 4212 with the eighth tab 4213 (not shown), so that two adjacent third series units 63 are connected in series. When two adjacent third series units 63 are relatively displaced along the first direction X, the fourth elastic segment 42121 can absorb a pulling force or a pressing force on the fourth pole ear 4212 through elastic deformation, and the eighth elastic segment 42131 can absorb a pulling force or a pressing force on the eighth pole ear 4213 through elastic deformation, so that the influence of the relative displacement of the two adjacent third series units 63 along the first direction X on the pulling or pressing of the interconnected fourth pole ear 4212 and eighth pole ear 4213 is reduced.

As shown in fig. 3 and 20, in an embodiment, two adjacent second battery cells 221 are connected in parallel to form a second parallel unit 72, and the second assembly 22 forms four second parallel units 72 arranged along the first direction X. In one second parallel unit 72, two second housings 2211 are stacked in the first direction X, two second pole pieces 2212 are opposed and connected, and two sixth pole pieces 2213 are opposed and connected. When two second cells 221 in the second parallel unit 72 are displaced relatively along the first direction X, the second elastic segment 22121 can absorb a pulling force or a pressing force on the second pole lug 2212 through elastic deformation, the sixth elastic segment 22131 can absorb a pulling force or a pressing force on the sixth pole lug 2213 through elastic deformation, and therefore, the influence of the relative displacement of the two adjacent second cells 221 along the first direction X on the pulling or pressing of the two interconnected second pole lugs 2212 and the influence on the pulling or pressing of the two interconnected sixth pole lugs 2213 are reduced.

In other embodiments, the number of the second cells 221 in the second parallel unit 72 may also be three, four, or more. As an example, the number of the second cells 221 in the second parallel unit 72 is two, which is further described below.

In one embodiment, two adjacent fourth cells 421 are connected in parallel to form a fourth parallel unit 74, and the fourth assembly 42 forms four fourth parallel units 74 arranged along the first direction X. In one fourth parallel unit 74, in the first direction X, two fourth housings 4211 are stacked, two fourth pole ears 4212 are opposed and connected, and two eighth pole ears 4213 are opposed and connected. When two fourth cells 421 in the fourth parallel unit 74 are displaced relatively along the first direction X, the fourth elastic segment 42121 can absorb a pulling force or a pressing force on the fourth tab 4212 through elastic deformation, and the eighth elastic segment 42131 can absorb a pulling force or a pressing force on the eighth tab 4213 through elastic deformation, so that the influence of the relative displacement of the two adjacent fourth cells 421 along the first direction X on the pulling or pressing of the two fourth tabs 4212 connected to each other is reduced, and the influence on the pulling or pressing of the two eighth tabs 4213 connected to each other is reduced.

In other embodiments, the number of the fourth cells 421 in the fourth parallel unit 74 may also be three, four or more. As an example, the number of the fourth cells 421 in the fourth parallel unit 74 is two, which is further described below.

In the second direction Y, one second parallel unit 72 is opposite to and electrically connected to one fourth parallel unit 74. In one embodiment, the second parallel unit 72 and the fourth parallel unit 74 are connected in series, opposite along the second direction Y. In other embodiments, the second parallel unit 72 and the fourth parallel unit 74, which are opposite in the second direction Y, are connected in parallel (not shown). As an example, the following is further described by taking as an example a connection of the second parallel unit 72 and the fourth parallel unit 74 in series, which are opposed to each other in the second direction Y.

The second parallel unit 72 and the fourth parallel unit 74 connected in series with each other form one fourth series unit 64, the second module 22 and the fourth module 42 form four fourth series units 64, and the four fourth series units 64 are sequentially stacked in the first direction X.

In one embodiment, the second pole 2212 of the second parallel unit 72 is connected to the fourth pole 4212 of the fourth parallel unit 74 in the same fourth series unit 64. When the second parallel unit 72 and the fourth parallel unit 74 are relatively displaced along the first direction X, the second elastic segment 22121 can absorb a pulling force or a pressing force on the second pole tab 2212 through elastic deformation, and the fourth elastic segment 42121 can absorb a pulling force or a pressing force on the fourth pole tab 4212 through elastic deformation, so that the influence of the relative displacement of the second parallel unit 72 and the fourth parallel unit 74 along the first direction X on the pulling or pressing of the second pole tab 2212 and the fourth pole tab 4212 is reduced.

As shown in fig. 21, in one embodiment, in the same fourth series unit 64, the sixth pole tab 2213 of the second parallel unit 72 is connected with the eighth pole tab 4213 of the fourth parallel unit 74. When the second parallel unit 72 and the fourth parallel unit 74 are relatively displaced along the first direction X, the sixth elastic segment 22131 can absorb a pulling force or a pressing force on the sixth pole ear 2213 through elastic deformation, and the eighth elastic segment 42131 can absorb a pulling force or a pressing force on the eighth pole ear 4213 through elastic deformation, so that the influence of the relative displacement of the second parallel unit 72 and the fourth parallel unit 74 along the first direction X on the pulling or pressing of the sixth pole ear 2213 and the eighth pole ear 4213 is reduced.

Referring to fig. 3 and 22, in one embodiment, four second series units 62 are connected in series in sequence, so that the first device 21 and the third device 41 form a series module. In other embodiments, four second series units 62 are connected in parallel, such that the first module 21 and the third module 41 form a parallel module. As an example, the following further describes a case where four second series units 62 are connected in series in sequence.

In one embodiment, four fourth series units 64 are connected in series such that the second module 22 and the fourth module 42 form a series module. In other embodiments, four fourth series cells 64 are connected in parallel, such that the second module 22 and the fourth module 42 form a parallel module. As an example, the following description will be further made by taking the example of the connection of four fourth series units 64 in series in sequence.

In an embodiment, third module 41 is connected in series with fourth module 42, such that first module 21, second module 22, third module 41, and fourth module 42 are connected in series. In one embodiment, the first module 21 is connected in series with the second module 22 such that the first module 21, the second module 22, the third module 41 and the fourth module 42 are connected in series. In one embodiment, the third and

fourth elements

41, 42 are connected in parallel, such that the series module formed by the first and

third elements

21, 41 and the series module formed by the second and

fourth elements

22, 42 are connected in parallel. In one embodiment, the first module 21 and the second module 22 are connected in parallel, such that the series module formed by the first module 21 and the third module 41 and the series module formed by the second module 22 and the fourth module 42 are connected in parallel.

As an example, the third component 41 and the fourth component 42 are connected in series for further description.

The third parallel unit 73 and the fourth parallel unit 74 connected to the second elastic member 50 are connected to each other and connected to electrically connect the third assembly 41 and the fourth assembly 42.

In one embodiment, the electrochemical device 100 further includes a plurality of conductive members 90, a part of the conductive members 90 is for electrically connecting two adjacent and connected first parallel units 71, a part of the conductive members 90 is for electrically connecting two adjacent and connected second parallel units 72, a part of the conductive members 90 is for electrically connecting two adjacent and connected third parallel units 73, a part of the conductive members 90 is for electrically connecting two adjacent and connected fourth parallel units 74, and a part of the conductive members 90 is for electrically connecting the adjacent and connected third parallel units 73 and fourth parallel units 74.

For example, two third parallel units 73 connected to each other in the third component 41 are taken as an example, wherein the third tab 4112 in one third parallel unit 73 and the seventh tab 4113 in the other third parallel unit 73 are bent towards each other and are connected to the same conductive member 90, so as to achieve electrical connection. In one embodiment, the third tab 4112 and the seventh tab 4113 are connected to the conductive member 90 by welding, so that the connection stability and the shock resistance of the electrochemical device 100 can be improved.

In one embodiment, two conductive members 90 are used to electrically connect two adjacent and connected first parallel units 71, two conductive members 90 are used to electrically connect two adjacent and connected second parallel units 72, one conductive member 90 is used to electrically connect two adjacent and connected third parallel units 73, one conductive member 90 is used to electrically connect two adjacent and connected fourth parallel units 74, and one conductive member 90 is used to electrically connect adjacent and connected third parallel units 73 and fourth parallel units 74.

In one embodiment, the conductive member 90 is a plate-shaped metal material. Optionally, the conductive member 90 is made of any one of copper, aluminum, nickel, and nickel alloy.

Referring to fig. 2, 3 and 22, the electrochemical device 100 further includes a circuit board (not shown) disposed in the housing 10, and the circuit board is electrically connected to the first assembly 21, the second assembly 22, the third assembly 41 and the fourth assembly 42.

The tab of one third parallel unit 73 in the third assembly 41 is not connected with other tabs, the tab of one fourth parallel unit 74 in the fourth assembly 42 is not connected with other tabs, the tabs which are not connected with other tabs in the third assembly 41 and the tabs which are not connected with other tabs in the fourth assembly 42 form a total positive tab 81 and a total negative tab 82, and the total positive tab 81 and the total negative tab 82 are used for electrically connecting the circuit board.

In one embodiment, the electrochemical device 100 further comprises a first connector 83 and a second connector 84, wherein the first connector 83 connects the total positive tab 81 and the circuit board such that the total positive tab 81 is electrically connected to the circuit board, and the second connector 84 connects the positive and negative tabs and the circuit board such that the total negative tab 82 is electrically connected to the circuit board. In one embodiment, the material of the first connecting member 83 includes any one of copper, aluminum, nickel and nickel alloy. In one embodiment, the material of the second connecting member 84 includes any one of copper, aluminum, nickel and nickel alloy.

In one embodiment, the fifth wall 15 is provided with a first protrusion 151, and the first protrusion 151 extends from the surface of the fifth wall 15 toward the sixth wall 16.

In an embodiment, in the second direction Y, the first protrusion 151 is disposed between the first housing 2111 and the third housing 4111, and is in contact with and connected to the first housing 2111 and the third housing 4111, the first protrusion 151 can perform a limiting function, and by connecting the first housing 2111 and the third housing 4111, the first battery cell 211 and the third battery cell 411 can be limited from relative displacement in the second direction Y, the number of limiting members or fillers of the electrochemical device 100 for the first battery cell 211 and the third battery cell 411 is reduced, and the cost of the electrochemical device 100 is reduced.

In an embodiment, in the second direction Y, the first protrusion 151 is disposed between the second housing 2211 and the fourth housing 4211 and is in contact with and connected to the second housing 2211 and the fourth housing 4211, the first protrusion 151 can perform a limiting function, and by connecting the second housing 2211 and the fourth housing 4211, the relative displacement of the second battery cell 221 and the fourth battery cell 421 in the second direction Y can be limited, so as to reduce the number of limiting members or fillers of the electrochemical device 100 for the second battery cell 221 and the fourth battery cell 421, and reduce the cost of the electrochemical device 100.

In an embodiment, the number of the first protrusions 151 is multiple, and the multiple first protrusions 151 are arranged in an array at intervals along the first direction X.

In one embodiment, the fifth wall 15 is provided with a second protrusion 152, and the second protrusion 152 extends from the surface of the fifth wall 15 toward the sixth wall 16.

In an embodiment, in the second direction Y, the second protrusion 152 is disposed on a side of the first housing 2111 away from the third housing 4111, and is connected to the first housing 2111 in a contact manner, the second protrusion 152 can perform a limiting function, the first battery cell 211 can be limited by connecting the first housing 2111 along the second direction Y, the second protrusion 152 and the first protrusion 151 cooperate to limit the displacement of the first housing 2111 along the second direction Y, the number of stoppers or fillers of the electrochemical device 100 for the first battery cell 211 is reduced, and the cost of the electrochemical device 100 is reduced.

In an embodiment, in the second direction Y, the second protrusion 152 is disposed on a side of the second housing 2211 away from the fourth housing 4211, and is in contact with the second housing 2211, the second protrusion 152 can perform a limiting function, the second housing 2211 can be connected to limit a relative displacement of the second battery cell 221 in the second direction Y, the second protrusion 152 and the first protrusion 151 cooperate to limit a displacement of the second housing 2211 in the second direction Y, the number of limiting members or fillers of the electrochemical device 100 for the second battery cell 221 is reduced, and the cost of the electrochemical device 100 is reduced.

In an embodiment, the number of the second protrusions 152 is multiple, and the multiple second protrusions 152 are arranged in the first direction X at intervals.

In an embodiment, the fifth wall 15 is provided with a third protrusion 153, and the third protrusion 153 extends from the surface of the fifth wall 15 toward the sixth wall 16.

In an embodiment, in the second direction Y, the third protrusion 153 is disposed on a side of the third housing 4111 away from the first housing 2111, and is in contact with the third housing 4111, the third protrusion 153 can perform a limiting function, the third battery cell 411 can be limited by connecting the third housing 4111 to relatively displace in the second direction Y, the third protrusion 153 cooperates with the first protrusion 151 to limit the displacement of the third housing 4111 in the second direction Y, the number of limiting members or fillers of the electrochemical device 100 for the third battery cell 411 is reduced, and the cost of the electrochemical device 100 is reduced.

In an embodiment, in the second direction Y, the third protrusion 153 is disposed on a side of the fourth casing 4211 away from the second casing 2211, and is in contact with the fourth casing 4211, the third protrusion 153 can perform a limiting function, and can limit a relative displacement of the fourth battery cell 421 along the second direction Y by being connected to the fourth casing 4211, and the third protrusion 153 and the first protrusion 151 cooperate to limit a displacement of the fourth casing 4211 along the second direction Y, so as to reduce the number of limiting members or fillers of the electrochemical device 100 for the fourth battery cell 421, and reduce the cost of the electrochemical device 100.

In one embodiment, the number of the third protrusions 153 is multiple, and the multiple third protrusions 153 are arranged in an array at intervals along the first direction X.

In one embodiment, a fourth protrusion (not shown) is disposed on the sixth wall 16, and the fourth protrusion extends from the surface of the sixth wall 16 toward the fifth wall 15. In an embodiment, the position, function and effect of the fourth protrusion and the first protrusion 151 correspond, and are not described herein again.

In one embodiment, a fifth protrusion (not shown) is disposed on the sixth wall 16, and the fifth protrusion extends from the surface of the sixth wall 16 toward the fifth wall 15. In an embodiment, the positions, functions and effects of the fifth protruding portion and the second protruding portion 152 correspond, which are not described herein again.

In one embodiment, a sixth protrusion (not shown) is disposed on the sixth wall 16, and extends from the surface of the sixth wall 16 toward the fifth wall 15. In an embodiment, the position, function and effect of the sixth protrusion 153 correspond to those of the third protrusion, which are not described herein again.

To sum up, in the electrochemical device 100 of the present application, the first elastic component 30 is disposed between the first component 21 and the second component 22 and is connected to the first component 21 and the second component 22, so that the plurality of first battery cells 211 are sequentially pressed to be limited and the plurality of second battery cells 221 are sequentially pressed to be limited by the elastic restoring force of the first elastic component 30, the amount of the filler filled between the plurality of first battery cells 211 and between the plurality of second battery cells 221 can be reduced, and the cost of the electrochemical device 100 is reduced.

As shown in fig. 23, an embodiment of the present application further provides a power consumption apparatus 200, which includes the electrochemical device 100 according to any of the foregoing embodiments, and the electrochemical device 100 can provide electric energy for the power consumption apparatus 200. The electrochemical device 100 includes less filler, and is lower in cost, which is beneficial to reducing the cost of the electric equipment 200.

In an embodiment, the powered device 200 includes, but is not limited to, any one of a drone, an electric two-wheeled vehicle, a household appliance, and a robot.

In addition, other changes may be made by those skilled in the art within the spirit of the present application, and it is understood that such changes are encompassed within the scope of the present disclosure.

Claims

1. An electrochemical device comprises a shell and a first battery cell module arranged in the shell, and is characterized in that,

the first battery cell module comprises a first assembly and a second assembly, the first assembly and the second assembly are arranged along a first direction, the first assembly comprises a plurality of first battery cells, the plurality of first battery cells are stacked along the first direction, the second assembly comprises a plurality of second battery cells, the plurality of second battery cells are stacked along the first direction, and the first direction is the thickness direction of the first battery cells and the second battery cells;

the electrochemical device further includes a first elastic member disposed between and connecting the first member and the second member, the first elastic member being capable of elastically deforming in the first direction.

2. The electrochemical device of claim 1, wherein said first resilient component comprises any one of a spring, a bladder, and a sheet metal member.

3. The electrochemical device of claim 1, wherein said first resilient component comprises:

a first baffle plate connected to the first assembly;

a second baffle connected to the second assembly;

and a first spring connecting the first shutter and the second shutter, the first spring being elastically deformable in the first direction.

4. The electrochemical device according to claim 3, wherein said first spring is provided in plural number, and said plural first springs are arranged in a spaced arrangement in a direction perpendicular to said first direction.

5. The electrochemical device according to claim 3,

the first battery cell comprises a first shell, and a projection of the first shell and a projection of the first baffle at least partially overlap along the first direction; and/or the presence of a gas in the atmosphere,

the second battery cell comprises a second shell, and a projection of the second shell at least partially overlaps a projection of the second baffle along the first direction.

6. The electrochemical device of claim 3, wherein said first spring connects said first and second baffles by snap-fit or adhesive.

7. The electrochemical device according to claim 1,

the electrochemical device further comprises a second cell module, and the second cell module and the first cell module are arranged along a second direction perpendicular to the first direction;

the second cell module comprises a third assembly and a fourth assembly, the third assembly and the fourth assembly are arranged along the first direction, the third assembly comprises a plurality of third cells, the plurality of third cells are stacked along the first direction, the fourth assembly comprises a plurality of fourth cells, and the plurality of fourth cells are stacked along the first direction;

the electrochemical device further includes a second elastic member disposed between and connecting the third member and the fourth member, the second elastic member being capable of elastically deforming in the first direction.

8. The electrochemical device of claim 7, wherein said second resilient component comprises:

a third baffle connected to the third assembly;

a fourth baffle connected to the fourth assembly;

and a second spring connecting the third shutter and the fourth shutter, the second spring being elastically deformable in the first direction.

9. The electrochemical device according to claim 7,

the first battery cell further comprises a first shell and first tabs, the first tabs extend out of the first shell, the third battery cell further comprises a third shell and third tabs, the third tabs extend out of the third shell, and one third tab is in contact with and connected to one first tab;

the first tab comprises a first elastic section which can elastically deform along the first direction;

the third tab includes a third elastic segment that is elastically deformable in the first direction.

10. The electrochemical device of claim 7,

the second cell further comprises a second shell and a second pole lug, the second pole lug extends out of the second shell, the fourth cell further comprises a fourth shell and a fourth pole lug, the fourth pole lug extends out of the fourth shell, and one fourth pole lug is in contact with and connected to one second pole lug;

the second pole ear comprises a second elastic section which can elastically deform along the first direction;

the fourth ear includes a fourth elastic section that is elastically deformable in the first direction.

11. The electrochemical device of claim 9,

the first elastic section is in any one of an N shape, an S shape, a V shape and a wave shape;

the third elastic section is any one of N type, S type, V type and wave shape.

12. The electrochemical device according to claim 10,

the second elastic section is in any one of an N shape, an S shape, a V shape and a wave shape;

the fourth elastic section is any one of an N-shaped elastic section, an S-shaped elastic section, a V-shaped elastic section and a wave-shaped elastic section.

13. The electrochemical device according to claim 1,

the first battery cells are sequentially contacted and stacked along the first direction; and/or the presence of a gas in the gas,

the plurality of second battery cells are sequentially contacted and stacked along the first direction.

14. The electrochemical device of claim 7,

a plurality of the third battery cells are sequentially contacted and stacked along the first direction; and/or the presence of a gas in the gas,

the plurality of fourth battery cells are sequentially in contact with one another along the first direction and are stacked.

15. An electrical consumer comprising an electrochemical device according to any one of claims 1 to 14.