CN116134664A

CN116134664A - Battery assembly and electric equipment

Info

Publication number: CN116134664A
Application number: CN202180049118.1A
Authority: CN
Inventors: 周权; 吴明杰; 喻律师
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2023-05-16
Also published as: WO2023039909A1

Abstract

The battery pack comprises a shell, a battery cell assembly and a first component, wherein the battery cell assembly is arranged in the shell, the battery cell assembly comprises a plurality of battery cells stacked along a first direction, each battery cell comprises a shell, an electrode assembly and an electrode terminal, the shell comprises a first part used for accommodating the electrode assembly and a second part formed by extending from the periphery of the first part, the electrode terminal is connected with the electrode assembly and extends out of the first part from the second part, the first component comprises an insulating material, the first component is arranged between the second parts of the adjacent battery cells along the first direction, the first component is abutted against the first part of the shell of the battery cell, when the battery pack is impacted, the force born by the battery cell can be transmitted to the shell through the first component, the impact force born by the shell of the battery cell is reduced, and the protection to the shell is improved.

Description

Battery assembly and electric equipment

Technical Field

The present application relates to the field of electrochemical devices, and more particularly, to a battery assembly and an electrical device having the same.

Background

In the use process of the battery assembly with the multiple battery cells, the battery assembly is influenced by complex use environments, the battery assembly is easy to be impacted, vibrated or impacted, and the like, at this time, electrolyte in the battery cells can impact the battery cell shell under the inertia effect, and the protection of the battery cell shell is further improved necessarily.

Disclosure of Invention

In view of the above, the present application provides a battery assembly and a powered device having the same that can improve the above problems.

The embodiment of the application provides a battery pack including shell, electric core subassembly and first component, electric core subassembly is located in the shell, electric core subassembly includes a plurality of electric cores that set up along first direction stack, electric core includes casing, electrode assembly and electrode terminal, the casing is including being used for acceping electrode assembly's first part and from the peripheral second part that forms that extends of first part, electrode terminal connect in electrode assembly and from the second part extends first part, first component includes insulating material, follows the first direction, first component is located adjacent between the second part of electric core. The embodiment of the application comprises the following technical effects: through setting up the first component along first direction between the second part of adjacent electric core, make the first component support the first part of the casing of electric core, when battery pack received the impact, the power that electric core received can be transmitted to the shell through the first component on, reduce the impact force that the casing of electric core received, promote the protection to the casing.

In some embodiments, the first member comprises a first structural member and a second structural member, the first structural member and the second structural member being removably connected. Technical effects included in some embodiments of the present application: the first structural member and the second structural member are spliced to form the first structural member, so that the mounting difficulty of the first structural member is reduced, and the production efficiency is improved.

In some embodiments, the first structural member and the second structural member are interposed in a second direction, the second direction being perpendicular to the first direction. Technical effects included in some embodiments of the present application: the connection structure between the first structural member and the second structural member is simplified.

In some embodiments, the first structural member comprises a plurality of first blocks and a plurality of second blocks, the plurality of first blocks and the plurality of second blocks being alternately arranged along the first direction. The second structural member comprises a plurality of third blocks and a plurality of fourth blocks, and the third blocks and the fourth blocks are alternately arranged along the first direction. The third block is detachably connected with the second block, and the fourth block is detachably connected with the first block. Technical effects included in some embodiments of the present application: different blocks of the first structural member and the second structural member are alternately connected, and the connection strength between the first structural member and the second structural member is improved.

In some embodiments, a first block protrusion is disposed at an end of each first block facing the second structural member, a second block recess is disposed at an end of each fourth block facing the first structural member, and the first block protrusion is inserted into the second block recess. Technical effects included in some embodiments of the present application: the first block convex part and the second block concave part are matched with each other, so that the connection reliability between the first structural part and the second structural part is improved.

In some embodiments, the first block protrusion includes a first section and a second section, the first section is connected between the first block and the second section, an outer surface of the second section is provided with a slope, and a cross-sectional area of the second section gradually decreases along an extending direction of the first block protrusion. Technical effects included in some embodiments of the present application: when the first block convex part and the second block concave part are spliced, the second section is used for guiding the moving direction of the first block convex part, so that the difficulty in pairing the first block convex part and the second block concave part is reduced, and the first block convex part smoothly enters the second block concave part.

In some embodiments, a third block protrusion is disposed at an end of the third block facing the first structural member, a second block recess is disposed at an end of the second block facing the second structural member, and the third block protrusion is inserted into the second block recess. Technical effects included in some embodiments of the present application: the third block convex part and the second block concave part are matched with each other, so that the connection reliability between the first structural part and the second structural part is further improved.

In some embodiments, the electrode terminals are connected to the electrode assembly and extend from the second portion to the first portion, and the electrode terminals of two adjacent cells are connected to a side of the first block or the third block facing away from the cell assembly. Technical effects included in some embodiments of the present application: and the connection reliability between the battery cell assembly and the first component is improved.

In some embodiments, in a third direction, the thickness of the second block is greater than the thickness of the first block, the thickness of the fourth block is greater than the thickness of the third block, and the thickness of the electrode terminal is less than or equal to a distance between an upper surface of the first block and an upper surface of the second block. Technical effects included in some embodiments of the present application: after the battery assembly is assembled, the surface of the electrode terminal does not exceed the surface of the first component, so that the overall dimension of the battery assembly is reduced, and the energy density is improved.

In some embodiments, a first connection portion is disposed between the adjacent first block and the second block, a first connection recess is disposed on a side of the first connection portion facing the cell assembly, a second connection portion is disposed between the adjacent third block and the fourth block, a second connection recess is disposed on a side of the second connection portion facing the cell assembly, and opposite ends of the second portion are disposed on the first connection recess and the second connection recess respectively along a second direction. Technical effects included in some embodiments of the present application: the second connecting concave part and the second connecting concave part are utilized to avoid the second part of the battery cell shell, so that the first component can adapt to the appearance structure of the battery cell assembly, and meanwhile, the first component and the battery cell assembly can be limited, and the relative movement between the first component and the battery cell assembly is reduced.

In some embodiments, a first protruding portion is disposed on one side of the first connection recess, a second protruding portion is disposed on one side of the second connection recess, and bending portions are disposed on two opposite sides of the second portion, respectively, where the first protruding portion and the second protruding portion abut against the bending portions. Technical effects included in some embodiments of the present application: the shaking of the second part in the battery cell is reduced, so that the risk of damage to the shell of the battery cell is reduced.

In some embodiments, along the second direction, a first step surface is provided on a side of the first connection portion facing away from the battery cell assembly, a second step surface is provided on a side of the second connection portion facing away from the battery cell assembly, and first protrusions are further provided inside two opposite sides of the housing, and the first protrusions are abutted to and connected to the first step surface and the second step surface. Technical effects included in some embodiments of the present application: the first convex part of the shell abuts against the first step surface and the second step surface on the first component, so that on one hand, the force born by the battery cell is transmitted to the shell, on the other hand, the first component can be limited, and the problem that the first component is displaced is solved.

In some embodiments, along the first direction, a first recess and a second recess are respectively disposed on two opposite sides of the second portion, the depth of the first recess is greater than that of the second recess, and the bending portion is disposed in the first recess. Technical effects included in some embodiments of the present application: the bending part is arranged on the pit side of the battery cell, so that the condition that the second part protrudes out of the surface of the battery cell can be reduced, and the energy density of the battery cell is improved.

In some embodiments, along the second direction, the housing includes a first side wall and a second side wall that are oppositely disposed, a side of the first side wall facing the battery cell assembly is provided with a plurality of first side wall recesses, a plurality of side edges of the battery cell are provided with a plurality of first side wall recesses, a first side wall protruding portion is provided between adjacent first side wall recesses, a side of the first structural member facing the first side wall is provided with a fourth connection recess, and the first side wall protruding portion is provided in the fourth connection recess. Technical effects included in some embodiments of the present application: the first side wall concave part and the first side wall convex part are combined to form an imitation groove for positioning a plurality of battery cells in the battery cell assembly, and shaking of the battery cell assembly in the shell is reduced. The fourth connecting concave part on the first structural member is used for avoiding the first side wall convex part on the shell and can also play a role in positioning the first structural member.

In some embodiments, the battery assembly further comprises a circuit board disposed on a side of the first structural member and the second structural member facing away from the battery cell assembly, the circuit board is electrically connected to the electrode terminals of the battery cell assembly, and the housing comprises a second protrusion disposed on a side of the circuit board facing away from the battery cell assembly. Technical effects included in some embodiments of the present application: the circuit board can be used for detecting and controlling the condition of charging of electric core subassembly, and the second convex part cooperates with the circuit board, can enough fix a position the circuit board, can regard as another force transmission structure again with the circuit board, is favorable to transmitting the power that electric core subassembly received to the shell.

In some embodiments, along the first direction, opposite ends of the first structural member are provided with a first end and a second end, respectively, and opposite ends of the second structural member are provided with a third end and a fourth end, respectively, the first end being connected to the third end, and the second end being connected to the fourth end. Technical effects included in some embodiments of the present application: the two ends of the first structural member and the two ends of the second structural member are matched with each other, so that the connection strength between the first structural member and the second structural member can be further improved, and the integrity of the first structural member is maintained.

In some embodiments, the shore C hardness of the first member is greater than or equal to 70 degrees to facilitate transmission of an impact force received by the battery cell housing to the housing.

The embodiment of the application also provides a battery assembly, including the shell and locate the electric core subassembly in the shell, electric core subassembly includes a plurality of electric cores that set up along first direction stacks, electric core includes casing, electrode assembly and electrode terminal, the casing is including being used for acceping electrode assembly's first part and from the peripheral second part that forms that extends of first part, electrode terminal connect in electrode assembly and from the second part extends first part. The battery assembly further includes a first member including an insulating material, the first member being connected to the housing, the first member being disposed between the second portions of adjacent cells along the first direction. The embodiment of the application comprises the following technical effects: through setting up the first component of being connected with the shell to set up first component along first direction between the second part of adjacent electric core, make first component support the first part of the casing of electric core, when battery pack received the impact, the power that electric core received can be transmitted to the shell through first component on, reduce the impact force that electric core casing received, promote the protection to electric core casing.

In some embodiments, the first member includes a first structural member and a second structural member, the housing includes a first shell and a second shell disposed opposite each other along a second direction, the first structural member is connected to the first shell, the second structural member is connected to the second shell, and the first structural member is disposed opposite the second structural member along the second direction. Technical effects included in some embodiments of the present application: the first structural member and the second structural member are respectively connected with the first shell and the second shell, and the first structural member and the second structural member can be assembled when the shell is assembled, so that the production efficiency is improved.

In some embodiments, an end of the first structural member facing the second structural member is provided with a first recess, and an end of the second structural member facing the first structural member is provided with a first projection, and the first projection is provided in the first recess. Technical effects included in some embodiments of the present application: the first protruding blocks are matched with the first concave parts, so that connection reliability between the first structural part and the second structural part is improved.

In some embodiments, the first bump includes a first section and a second section, the first bump having a cross-sectional area that gradually decreases along an extension direction of the first bump.

In some embodiments, a plurality of the first structural members are arranged between the second parts of the adjacent battery cells at intervals, and the number of the second structural members corresponds to the number of the first structural members one by one. Technical effects included in some embodiments of the present application: let a plurality of first structures and a plurality of second structure pair connection one by one, on the one hand can promote the intensity of first component, on the other hand also is favorable to guaranteeing the connection effect of shell.

In some embodiments, the battery assembly further includes a first conductive member disposed on a side of the first structural member facing away from the battery cells, and the electrode terminals of two adjacent battery cells are connected to the first conductive member. Technical effects included in some embodiments of the present application: the first conductive piece is used for realizing the electric connection of the circuit board or the external circuit element and the battery cell, is arranged on one side of the first structural part deviating from the battery cell, can be sleeved on the first structural part when the electrode terminals are connected, realizes the positioning connection between the battery cell assembly and the first structural part, and reduces the relative displacement between the first structural part and the battery cell assembly.

In some embodiments, the battery assembly further includes a first conductive member disposed between adjacent ones of the second structural members along the first direction. Technical effects included in some embodiments of the present application: the positive electrode terminal and the negative electrode terminal of the battery core can be connected with the corresponding first conductive piece, so that the circuit integrity of the battery core assembly is maintained.

In some embodiments, the battery assembly further includes a circuit board, and the first conductive member is electrically connected to the circuit board.

In some embodiments, a second recess is provided on a side of the first structural member facing away from the battery cell, and the first conductive member is provided in the second recess. Technical effects included in some embodiments of the present application: the positioning of the first conductive piece on the first structural piece is facilitated, and the shaking of the first conductive piece is reduced.

In some embodiments, the first shell includes a first sidewall, the first sidewall is provided with a plurality of first concave portions, the first concave portions are disposed on a side of the battery cell facing the first shell, a first protruding portion is disposed between adjacent first concave portions, and the first structural member is connected to the first protruding portion. Technical effects included in some embodiments of the present application: it is advantageous to position the first structural member and the first shell.

In some embodiments, the first structural member includes a first portion connected to one of the adjacent first recesses and a second portion connected to the other of the adjacent first recesses, the length of the first portion projected in a first direction of the first side wall not exceeding the length of the first recess in the first direction, and the length of the second portion projected in the first direction of the first side wall not exceeding the length of the first recess in the first direction. Technical effects included in some embodiments of the present application: the second part is not connected to the bottommost part of the first concave part, so that the assembly of the shell is more convenient.

In some embodiments, the first side wall includes a first supporting portion, the circuit board is disposed on the first supporting portion, the first structural member is connected to the first supporting portion, and the circuit board and the first structural member are disposed on two opposite sides of the first supporting portion. Technical effects included in some embodiments of the present application: providing positioning and supporting effects for the circuit board and further improving the connection strength between the first structural member and the first shell.

In some embodiments, the first shell and the first structural member are an integrally formed structure, and the second shell and the second structural member are an integrally formed structure. Technical effects included in some embodiments of the present application: the integrated into one piece's mode can be injection molding, and the impact that the transmission electric core that can be better received also is favorable to reducing the assembly step simultaneously, improves production efficiency.

In some embodiments, the first conductive member includes a first section and a second section, the first section is disposed in the second recess, and the first support is disposed between the second section and the first recess. Technical effects included in some embodiments of the present application: on the one hand, the supporting part can assist in positioning the first conductive piece, and on the other hand, the connecting part of the first conductive piece and the circuit board can also be supported.

In some embodiments, the first conductive element further includes a third segment connecting the first segment and the second segment, the third segment being disposed obliquely with respect to the first segment, the first support portion including a first inclined surface, the first inclined surface being connected to the first structural member. Technical effects included in some embodiments of the present application: the assembly process of the battery assembly is convenient.

In some embodiments, the electrode terminal includes a connection portion connected with the first conductive member, and the first bump is at least partially disposed between the connection portion and the first portion along a third direction perpendicular to both the first direction and the second direction. Technical effects included in some embodiments of the present application: the connecting strength of the first structural member and the second structural member is guaranteed, the first structural member can better press the shell of the battery cell, and the shell of the battery cell is further protected.

In some embodiments, the first bump is at least partially disposed between the connection portion and the first portion, along the second direction, and a length of the portion of the first bump disposed between the connection portion and the first portion is greater than 1/2 of a length of the connection portion. Technical effects included in some embodiments of the present application: the dimensional relationship of the first projection inserted into the first recess is further defined, so that the first member can effectively abut against the housing of the battery cell.

In some embodiments, the second shell includes a second side wall, the second side wall is provided with a plurality of second concave portions, the side of the battery cell facing the second shell is provided with the second concave portions, a second protruding portion is provided between adjacent second concave portions, and the second structural member is connected with the second protruding portion.

In some embodiments, in the second direction, two opposite sides of the second portion are further provided with bending portions, and the first member abuts against the bending portions. Technical effects included in some embodiments of the present application: the shaking of the second part in the battery cell is reduced, so that the problem that the shell of the battery cell is damaged due to friction of the second part is solved.

The embodiment of the application also provides electric equipment, which comprises the battery assembly. The electric equipment comprises, but is not limited to, an electric vehicle, a storage device, an unmanned aerial vehicle, an electric tool and the like.

According to the battery assembly, the first component is arranged between the second parts of the adjacent battery cells, so that the first component abuts against the first part of the shell of the battery cell, when the battery assembly is impacted, the force received by the battery cell can be transmitted to the shell through the first component, the impact force received by the shell of the battery cell is reduced, and the protection of the shell is improved.

Drawings

Fig. 1 is a schematic perspective view of a battery assembly in an embodiment.

Fig. 2 is an exploded view of the battery assembly of fig. 1.

Fig. 3 is an exploded view of the battery cell of the battery assembly of fig. 2.

Fig. 4 is a schematic structural view of the battery module and the first member in the battery module shown in fig. 1.

Fig. 5 is an enlarged view of a partial structure of the structure shown in fig. 4.

Fig. 6 is an exploded view of a portion of the structure shown in fig. 4.

Fig. 7 is an enlarged view of a part of the structure shown in fig. 6.

Fig. 8 is a top view of a first member of the battery assembly of fig. 2, wherein the structures of the first section, the second section, the third section, the fourth section, etc. are not fully labeled.

Fig. 9 is a schematic structural view of the first structural member shown in fig. 8 before the first structural member is connected to the second structural member.

Fig. 10 is a schematic cross-sectional view of the first member shown in fig. 8.

Fig. 11 is a schematic side view of the first structural member and the second structural member in the second direction B.

Fig. 12 is a schematic diagram of a cell structure in an embodiment.

Fig. 13 is a front view of the cell of fig. 12.

Fig. 14 is a side view of the cell of fig. 12.

Fig. 15 is a schematic view showing the structure of the battery assembly shown in fig. 1, in which the battery cell assembly and the first member are in the other direction.

Fig. 16 is an enlarged view of a part of the structure shown in fig. 15.

Fig. 17 is a side view of the structure shown in fig. 15.

Fig. 18 is an enlarged view of a portion of the structure shown in fig. 17.

Fig. 19 is a top view of the battery assembly of fig. 1.

Fig. 20 is a schematic cross-sectional structure of the battery assembly shown in fig. 19.

Fig. 21 is an enlarged view of a partial structure of the battery assembly shown in fig. 20.

Fig. 22 is a schematic view of the battery assembly of fig. 1 with a portion of the top structure removed.

Fig. 23 is a top view of the structure shown in fig. 22.

Fig. 24 is a schematic view of the battery assembly of fig. 1 with the housing removed.

Fig. 25 is an enlarged view of a part of the structure shown in fig. 24.

Fig. 26 is a top view of the battery assembly of fig. 1.

Fig. 27 is a schematic cross-sectional structure of the battery assembly shown in fig. 23.

Fig. 28 is an enlarged view of a part of the structure shown in fig. 27.

Fig. 29 is a cross-sectional view of the battery assembly of fig. 1 after cutting away a portion of the second side wall of the second case in the second direction.

Fig. 1' is a schematic exploded view of a battery assembly in one embodiment.

Fig. 2 'is a side view of the battery assembly of fig. 1' with the harness assembly removed.

Fig. 3 'is a schematic cross-sectional view of the battery assembly shown in fig. 2', and the structure in the dashed circle is a partially enlarged view of the cross-sectional structure.

Fig. 4 'is a schematic view of the structure of the first case in the case of the battery assembly shown in fig. 1'.

Fig. 5 'is a schematic view of the first shell shown in fig. 4' in another direction, and the structure in the dashed circle is a partially enlarged view of the first shell.

Fig. 6 'is a schematic view of the structure of a second case in the case of the battery pack shown in fig. 1'.

Fig. 7 'is a schematic view of the second shell shown in fig. 6' in another direction, and the structure in the dashed circle is a partially enlarged view of the second shell.

Fig. 8 'is a schematic view of the battery assembly of fig. 1' with a portion of the structure removed, and the structure in the dashed circle is a partially enlarged view.

Fig. 9 'is a side view of the battery assembly of fig. 1' with the harness assembly removed.

Fig. 10 'is a schematic cross-sectional view of the battery assembly shown in fig. 9', and the structure in the dashed circle is a partially enlarged view of the cross-sectional structure.

Fig. 11 'is a schematic view of a cross-sectional structure of the battery assembly shown in fig. 9' in another direction, and the structure in the dashed circle is a partially enlarged view of the cross-sectional structure.

Fig. 12 'is a schematic view of the structure of the battery cell in the battery assembly shown in fig. 1'.

Fig. 13' is a schematic structural view of the first and second shells before they are connected, with the top portion structure removed.

Fig. 14' is a schematic cross-sectional structure of the first and second cases after they are coupled.

Fig. 30 is a simplified schematic diagram of a powered device in an embodiment.

Description of main reference numerals:

battery pack 100,100'

Outer casing

10,10'

First shell 11,11'

First side walls 111, 111'

First sidewall recesses 112,112'

First sidewall projections 113,113'

A first top wall 114

First bottom wall 115

First end wall 116

First opening 1161

First support portion 114'

Second inclined surface 1141'

Second end wall 117

Second shell 12,12'

Second side walls 121,121'

Second sidewall recesses 122,122'

Second side wall protrusions 123,123'

A second top wall 124

Second bottom wall 125

Third end wall 126

Second opening 1261

Fourth end wall 127

First convex part 13

Second convex portion 14

Cell assemblies 20,20'

Cell 21,21'

Housings 211,211'

First portion 2111,2111'

Second portion 2112,2112'

First housing 211a

Second housing 211b

First region 211c

Second region 211d

Bending portion 2113,2113'

First recesses 2114, 2114'

Second recesses 2115, 2115'

Electrode assembly 212

Electrode terminals

213a,213b

Connecting portion 2131'

Insulation elements 22,22'

First members 30,30'

First

structural member

31,31'

First block 311

Surface 3111

Second block 312

First protruding portion 3121

First block protrusions 313,321'

First section 3131,3211'

Second section 3132,3212'

Slope 3133

Second block recesses 314, 311'

First subsection 312'

Second section 313'

Fourth recess 314'

First connecting portion 315

First connecting concave portion 3151

First protrusion 3152

First step surface 3153

Fourth connection recess 316

First end 317

First inclined surface 3171

Second end 318

Second structural members 32,32'

Third block 321

Fourth block 322

Second projection 3221

Fourth block recess 323

Third block tab 324

Second connecting portion 325

Second connection recess 3251

Second protruding portion 3252

Second step face 3253

Sixth connection recess 326

Third end 327

Third concave portion 3271

Fourth end 328

Third subsection 322'

Fourth subsection 323'

Circuit boards 40,40'

Connectors 41, 41'

First segment 411'

Second section 412'

Third section 413'

Chip 42

Wire harness assembly 50

First end 51

Second end 52

Connector 53

Electric equipment 200

The specific embodiment is as follows:

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. 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. The terms "vertical," "horizontal," "left," "right," "top," "bottom," and the like are used herein for illustrative purposes only and are not intended to limit the present application.

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 application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

The embodiment of the application provides a battery assembly, which comprises a shell, a battery cell assembly and a first component. The battery cell assembly is arranged in the shell and comprises a plurality of battery cells stacked along a first direction, the battery cells comprise a shell, an electrode assembly and electrode terminals, the shell comprises a first part used for accommodating the electrode assembly and a second part formed by extending from the periphery of the first part, and the electrode terminals are connected to the electrode assembly and extend out of the first part from the second part. The first member comprises an insulating material, is arranged between the second parts of the adjacent battery cells along the first direction, and has a Shore hardness of 70 degrees or more.

According to the battery assembly, the first component with the Shore hardness being more than or equal to 70 degrees is arranged between the second parts of the adjacent battery cells, so that the first component abuts against the first part of the shell of the battery cell, when the battery assembly is impacted, the force received by the battery cell can be transmitted to the shell through the first component, and the protection of the shell of the battery cell is improved.

Some embodiments of the present application are described in detail. The following embodiments and features of the embodiments may be combined with each other without collision.

Referring to fig. 1 and 2, 3 and 11, in one embodiment of the present application, a battery assembly 100 includes a housing 10, a cell assembly 20 and a first member 30. The battery cell assembly 20 is disposed in the housing 10, and the battery cell assembly 20 includes a plurality of battery cells 21 stacked along a first direction a. The battery cell 21 includes a case 211, an electrode assembly 212, and an electrode terminal 213, and the case 211 includes a first portion 2111 for receiving the electrode assembly 212 and a second portion 2112 formed to extend from a periphery of the first portion 2111. The electrode assembly 212 includes a wound structure formed by winding a positive electrode sheet, a negative electrode sheet, and a separator. Optionally, the housing 211 includes an aluminum plastic film, and the battery cell 21 includes a soft package battery cell. Along the first direction a, the cell 21 includes a first recess 2114 and a second recess 2115 provided on opposite sides of the second portion 2112. The first recess 2114 and the second recess 2115 are formed by the first portion 2111 and the second portion 2112. Two of the

electrode terminals

213a, 213b are connected to the electrode assembly 212 and extend from the second portion 2112 to the first portion 2111. The polarities of the two

electrode terminals

213a and 213b are opposite, wherein the electrode terminal 213a may be a positive electrode and the electrode terminal 213b may be a negative electrode. The first member 30 includes an insulating material. Optionally, the first member 30 comprises foam, such as EVA foam, having a vinyl acetate content of 5% to 45%. Optionally, the first member 30 is made of an insulating material. Alternatively, the first member 30 is made of an insulating material and a metallic material. In the first direction a, the first member 30 is disposed between the second portions 2112 of the adjacent battery cells 21, the shore hardness C of the first member 30 is greater than or equal to 70 degrees, when the battery assembly 100 is impacted, vibrated or bumped, the force received by the battery cells 21 can be transferred to the housing 10 through the first member 30, so that the impact force received by the housing 211 at the first recess 2114 and the second recess 2115 is reduced, and the protection of the housing 211 is improved. Referring to fig. 2 and 4, the first member 30 includes a first structural member 31 and a second structural member 32, and the first structural member 31 and the second structural member 32 are connected. Optionally, the first structural member 31 and the second structural member 32 are detachably connected. When the battery assembly 100 is assembled, the first structural member 31 and the second structural member 32 are inserted between the second portions 2112 of the adjacent battery cells 21 along the second direction B perpendicular to the first direction a, and the first structural member 30 is formed by splicing the first structural member 31 and the second structural member 32, so that the friction distance between each portion of the first structural member 30 and the battery assembly 20 in the second direction B can be reduced, the friction resistance is reduced, the difficulty in mounting the first structural member 30 in the battery assembly 100 is reduced, and the production efficiency is improved. The cell assembly 20 further includes a plurality of insulating members 22, and one insulating member 22 is disposed between any adjacent cells 21. In embodiments of the present application, the insulator 22 includes, but is not limited to, a compressible material such as foam. The insulator 22 may be used to absorb the expansion volume of the cell 21 during charge and discharge.

Referring to fig. 4, 5, 6 and 7, the first structural member 31 and the second structural member 32 are inserted and connected along a second direction B, which is perpendicular to the first direction a, and the second direction B may be a width direction of the battery cell 21. The first structural member 31 includes a plurality of first blocks 311 and a plurality of second blocks 312, and the first blocks 311 and the second blocks 312 are alternately arranged along the first direction a. The second structural member 32 includes a plurality of third blocks 321 and a plurality of fourth blocks 322, and the fourth blocks 322 are alternately arranged with the third blocks 321 along the first direction a. The first structural member 31 and the second structural member 32 are connected to form a first member 30, the third block 321 is detachably connected to the second block 312, and the fourth block 322 is detachably connected to the first block 311.

With continued reference to fig. 6, 7, 8, 9, 10 and 11, a first block protrusion 313 is disposed at an end of each first block 311 facing the second structural member 32, and a fourth block recess 323 corresponding to the first block protrusion 313 is disposed at an end of each fourth block 322 facing the first structural member 31. A third block protrusion 324 is disposed at an end of each third block 321 facing the first structural member 31, and a second block recess 314 corresponding to the third block protrusion 324 is disposed at an end of each second block 312 facing the second structural member 32. When the first structural member 31 and the second structural member 32 are connected to form the first member 30, the first block protrusion 313 is inserted into the fourth block recess 323. The third block protrusion 324 is inserted into the second block recess 314. The first block protrusion 313 and the fourth block recess 323 are matched with each other, and the third block protrusion 324 and the second block recess 314 are matched with each other, so that the connection reliability between the first structural member 31 and the second structural member 32 is improved.

Further, referring to fig. 6 to 11 again, the first block protrusion 313 includes a first section 3131 and a second section 3132 integrally connected. The outer surface of the second section 3132 is provided with a chamfer 3133, and the cross-sectional area of the second section 3132 gradually decreases along a second direction B perpendicular to the first direction a. When the first block protrusion 313 is inserted into the fourth block recess 323, the second section 3132 can be used for guiding the moving direction of the first block protrusion 313, so as to reduce the difficulty of pairing the first block protrusion 313 with the fourth block recess 323, and facilitate the first block protrusion 313 to be inserted into the fourth block recess 323. The third block protrusion 324 has a similar structure to the first block protrusion 313 and is a two-stage structure with different cross-sectional dimensions, and the structure of the third block protrusion 324 is not described here again.

Along the first direction a, the opposite ends of the first structural member 31 are respectively provided with a first end 317 and a second end 318, and the opposite ends of the second structural member 32 are respectively provided with a third end 327 and a fourth end 328. When the first structural member 31 is inserted into the second structural member 32, the first end 317 is connected to the third end 327, and the second end 318 is connected to the fourth end 328. According to the embodiment of the application, the two ends of the first structural member 31 and the two ends of the second structural member 32 are matched with each other, so that the connection strength between the first structural member 31 and the second structural member 32 can be further improved.

Along the second direction B, the length of the first end 317 is greater than the length of the third end 327, a third recess 3271 is provided at an end of the third end 327 facing the first end 317, and an end of the first end 317 facing the third end 327 is inserted into the third recess 3271. The inner side surface of the first end 317 is further provided with a first inclined surface 3171, which can be used for guiding the moving direction of the first end 317 inserted into the third recess 3271, so as to reduce the difficulty of pairing between the first end 317 and the third end 327. The fourth end 328 has the same structure as the first end 317, the second end 318 has the same structure as the third end 327, and the second end 318 is inserted into the fourth end 328 when the first structural member 31 is connected to the second structural member 32.

Referring again to fig. 4, 5, 10 and 11, the electrode terminals 213 of two adjacent cells 21 are connected to each other at the first section 311 of the first structural member 31 facing away from the surface 3111 of the cell assembly 20, or the electrode terminals 213 of two adjacent cells 21 are connected to each other at the third section 321 of the second structural member 32 facing away from the cell assembly 20. The thickness D2 of the second block 312 is greater than the thickness D1 of the first block 311, and the thickness D4 of the fourth block 322 is greater than the thickness D3 of the third block 321 along a third direction C, which is perpendicular to both the first direction a and the second direction B. Along the third direction C, the electrode terminals 213 may not protrude beyond the second block 312 and the fourth block 322, and thus the external dimensions of the battery assembly 100 may be reduced, and the energy density may be improved.

Along the first direction a, the first structural member 31 includes a plurality of first protruding portions 3121, the first protruding portions 3121 are disposed on two opposite sides of the first block 311, the first protruding portions 3121 are disposed at one end of the first block 311 facing away from the second structural member 32, and the first protruding portions 3121 protrude from an upper surface of the first block 311. The first block 311 and the two first protrusions 3121 form a first space for receiving the connection member 41 connected to the electrode terminal 213, and the connection member 41 including, but not limited to, a conductive sheet and the like may be made of a metal material. The second structural member 32 includes a plurality of second protruding portions 3221, the second protruding portions 3221 are disposed on two opposite sides of the third block 321, the second protruding portions 3221 are disposed at one end of the third block 321 facing away from the first structural member 31, and the second protruding portions 3221 protrude from the upper surface of the third block 321. The two second protrusions 3221 of the third block 321 form a second space for receiving the connection member 41 connected to the electrode terminal 213. One end of the first protruding portion 3121 and one end of the second protruding portion 3221 are connected to the second block 312 or the fourth block 322, and the other end abuts against the electrode terminals 213 connected to each other, so as to achieve positioning between the electrode terminals 213 and the first member 30.

Referring to fig. 3, 12, 13 and 14, the housing 211 of the battery cell 21 includes a first housing 211a and a second housing 211b, the first housing 211a is connected to the second housing 211b, and the first housing 211a and the second housing 211b can be folded along the connection position, so that the first housing 211a and the second housing 211b overlap along the first direction a, and the first portion 2111 of the housing 211 is formed to cover the electrode assembly 212. The first housing 211a extends outward from the peripheral side to form a first region 211c, and the second housing 211b extends outward from the peripheral side to form a second region 211d. After the first housing 211a and the second housing 211b are folded along the connection position, the first region 211c is overlapped with and hermetically connected to the second region 211d, forming the second portion 2112 of the housing 211. The electrode terminal 213 protrudes from the case 211 from a side of the second portion 2112 opposite to the connection position.

Along the second direction B, two opposite sides of the second portion 2112 are further provided with bending portions 2113, and the bending portions 2113 are disposed in the first recess 2114, so that the situation that the second portion 2112 protrudes out of the surface of the battery cell 21 is reduced, and the risk of damage to the bending portions 2113 is reduced. In the cell assembly 20, between adjacent cells 21, the first recess 2114 of one cell 21 is opposite to the first recess 2114 of another cell 21, or the first recess 2114 of one cell 21 is opposite to the second recess 2115 of another cell 21. In this embodiment, the bending portion 2113 may be formed by extruding the second portions 2112 of the two sides of the cell 21 through the first structural member 31 and the second structural member 32 when the first structural member 31 and the second structural member 32 are connected in a plugging manner. After the first structural member 31 and the second structural member 32 are installed, the bending portion 2113 can be supported and limited. In other embodiments, the bending portion 2113 may be formed by mechanical pressing before the first structural member 31 and the second structural member 32 are installed, so as to reduce resistance of the first structural member 31 and the second structural member 32 during the installation process and improve the production efficiency of the battery assembly 100. Optionally, the first structural member 31 and the second structural member 32 are connected to the bending portion 2113 to limit movement of the bending portion 2113. Optionally, along a third direction C, the projection of the bending portion 2113 at least partially overlaps the projection of the first structural member 31 to limit the movement of the bending portion 2113. Optionally, along a third direction C, the projection of the bend 2113 at least partially overlaps the projection of the second structure 32 to limit movement of the bend 2113.

Referring to fig. 4, 5, 12, 13, 14, 15, 16, 17 and 18, in the first structural member 31, a first connection portion 315 is disposed between the adjacent first block 311 and second block 312, and the first connection portion 315 includes a first connection recess 3151 disposed near one side of the cell assembly 20. A second connection portion 325 is disposed between the third block 321 and the fourth block 322, and the second connection portion 325 includes a second connection recess 3251 disposed near one side of the cell assembly 20. Opposite ends of the second portion 2112 of the cell 21 are respectively disposed in the first connecting recess 3151 and the second connecting recess 3251 along the second direction B, so that the first member 30 can adapt to the external structure of the cell assembly 20, and the relative movement between the first member 30 and the cell assembly 20 is reduced.

Further, a first protrusion 3152 is further provided on one side of the first connection recess 3151, and a second protrusion 3252 is further provided on one side of the second connection recess 3251. When the first structural member 31 and the second structural member 32 are mounted on the cell assembly 20, the first protrusion 3152 and the second protrusion 3252 abut against the bent portions 2113 at opposite ends of the second portion 2112 of the cell 21, so as to reduce the shake of the second portion 2112 of the cell 21, and reduce the risk of damaging the housing 211 of the cell 21.

Along the third direction C, a first step surface 3153 is disposed on a side of the first connection portion 315 facing away from the battery cell assembly 20, and a second step surface 3253 is disposed on a side of the second connection portion 325 facing away from the battery cell assembly 20. First protruding parts 13 are further arranged inside two opposite sides of the shell 10, and the first protruding parts 13 are connected with the first member 30. Specifically, the first protrusion 13 abuts against and is connected to the first step surface 3153 and the second step surface 3253, which is favorable for transmitting the force received by the battery cell 21 to the housing 10 through the first member 30, and can limit the first member 30 and the housing 10, so as to reduce the displacement of the first member 30.

Referring to fig. 2, 22 and 23, along the second direction B, the housing 10 includes a first case 11 and a second case 12 connected to each other, the first case 11 includes a first sidewall 111, the second case 12 includes a second sidewall 121, and the first sidewall 111 is disposed opposite to the second sidewall 121 along the second direction B. The side of the first side wall 111 facing the battery cell assembly 20 is provided with a plurality of first side wall recesses 112, and the sides of the plurality of battery cells 21 are provided with a plurality of first side wall recesses 112. A first side wall convex part 113 is arranged between the adjacent first side wall concave parts 112, and the first side wall concave parts 112 and the first side wall convex parts 113 are combined to form an imitation groove for positioning a plurality of battery cells 21 in the battery cell assembly 20 and reducing the shake of the battery cell assembly 20 in the shell 10. A plurality of fourth connection concave portions 316 are provided on a side of the first structural member 31 facing the first side wall 111, the first side wall convex portions 113 are provided in the fourth connection concave portions 316, and the fourth connection concave portions 316 restrict movement of the first structural member 31. The side of the second side wall 121 facing the battery cell assembly 20 is also provided with a plurality of second side wall recesses 122, the second side wall recesses 122 correspond to the positions of the first side wall recesses 112, and the side of the battery cell 21 facing away from the first side wall 111 is provided with a plurality of second side wall recesses 122. A second side wall protrusion 123 is disposed between the second side wall recesses 122, the second side wall recesses 122 and the second side wall protrusions 123 form an imitation groove on the second side wall 121, and the imitation groove cooperates with the imitation groove on the first side wall 111 to clamp and position the battery cell assembly 20, so as to further improve the stability of the battery cell assembly 20 in the housing 10. The second structural member 32 is further provided with a plurality of sixth connecting concave portions 326 at a side facing the second side wall 121, the second side wall convex portions 123 are disposed in the sixth connecting concave portions 326, and the sixth connecting concave portions 326 can limit the movement of the second structural member 32.

Referring to fig. 2, 19-21, and 22-29, the battery assembly 100 further includes a circuit board 40, the battery assembly 20 is electrically connected to the circuit board 40, and a chip 42 including a plurality of electronic circuit components is disposed on the circuit board 40 for controlling the charge and discharge current of the battery assembly 20 and monitoring the charge and discharge temperature of the battery assembly 20. The circuit board 40 is disposed on a side of the first structural member 31 and the second structural member 32 facing away from the cell assembly 20. The circuit board 40 is electrically connected to the electrode terminals 213 of the battery cell assembly 20. The housing 10 includes a first protrusion 13, and the first protrusion 13 is disposed on a side of the circuit board 40 near the battery cell assembly 20. The housing 10 further includes a second protrusion 14, and the second protrusion 14 is disposed on a side of the circuit board 40 facing away from the battery cell assembly 20. The circuit board 40 may be used to detect and control the charging and discharging conditions of the battery cell assembly 20, and by the first protrusion 13 cooperating with the circuit board 40, the circuit board 40 may be used as another force transmission structure, which is beneficial to transmitting the force received by the battery cell assembly 20 to the housing 10.

The first shell 11 further includes a first top wall 114, a first bottom wall 115, a first end wall 116, and a second end wall 117 disposed about the first side wall 111. The second shell 12 further includes a second top wall 124, a second bottom wall 125, a third end wall 126, and a fourth end wall 127 disposed about the second side wall 121. Along the second direction B, the first top wall 114 and the second top wall 124 are disposed opposite to each other and detachably connected, the first bottom wall 115 and the second bottom wall 125 are disposed opposite to each other and detachably connected, the first end wall 116 and the third end wall 126 are disposed opposite to each other and detachably connected, and the second end wall 117 and the fourth end wall 127 are disposed opposite to each other and detachably connected. The first protruding portion 13 and the second protruding portion 14 are disposed on the first side wall 111 at intervals along the third direction C, and the first protruding portion 13 and the second protruding portion 14 are disposed on the second side wall 121 at intervals along the third direction C. The outer surfaces of the first side wall 111 and the second side wall 121 are further provided with a plurality of grooves for forming a heat dissipation structure on the surface of the housing 10 of the battery assembly 100, so as to increase the heat dissipation area of the housing 10 and improve the heat dissipation performance of the battery assembly 100.

The circuit board 40 is further connected with a plurality of connectors 41, and a plurality of connectors 41 are connected between the battery cell assembly 20 and the circuit board 40. Specifically, the connection parts of the electrode terminals 213 of the adjacent cells 21 are connected to one of the connecting members 41. Referring to fig. 4 and 5 again, each connecting member 41 is disposed on the upper surface of the first block 311 or the third block 321, and each connecting member 41 is at least partially disposed between adjacent first blocks 311 or between adjacent third blocks 321, so as to reduce the additional space occupied by the connecting member 41 and improve the energy density of the battery assembly 100.

The battery assembly 100 further includes a harness assembly 50, a first end 51 of the harness assembly 50 being connected to the circuit board 40, and a second end 52 of the harness assembly 50 extending out of the housing 10. Specifically, the first end wall 116 and the third end wall 126 of the housing 10 are respectively provided with a first opening 1161 and a second opening 1261, when the first shell 11 is assembled with the second shell 12, the first opening 1161 and the second opening 1261 are communicated, and the second end 52 of the wire harness assembly 50 extends out of the housing 10 from the first opening 1161 and the second opening 1261. The second end 52 of the harness assembly 50 is further provided with a connector 53, and the connector 53 is used for connecting an external device to perform a charging or discharging process of the battery assembly 100.

Referring to fig. 1 'and 12', in another embodiment of the present application, a battery pack of the present embodiment is similar to the previously-implemented battery assembly 100, and a repeated description of the same or similar configuration as the battery assembly 100 of the previously-implemented embodiment will be omitted in this example, with the differences being highlighted in this implementation. The same portions as those of the battery assembly 100 are given the same numerical numerals, and detailed description thereof is omitted, and the same numerical numerals are added with distinguishing symbols' in the present embodiment for further distinction. The first member 30 'is connected to the housing 10', and the shore hardness C of the first member is 70 degrees or more. In the first direction a, the first member 30' is disposed between the second portions 2112' of adjacent cells 21 '. When the battery assembly 100 'is impacted, the force received by the battery cell 21' can be transmitted to the shell 10 'through the first member 30', the force for impacting the shell 211 'of the battery cell 21' is transferred to the shell 10', the impact force received by the weak area at the top of the shell 211' of the battery cell 21 'is reduced, and the protection of the shell 211' is improved.

With continued reference to fig. 2 '3', 13 'and 14', the end of the first structural member 31 'remote from the second structural member 32' is connected to the first shell 11', and the end of the second structural member 32' remote from the first structural member 31 'is connected to the second shell 12'. By connecting the first structural member 31' and the second structural member 32' with the first shell 11' and the second shell 12', respectively, the assembly of the first structural member 31' and the second structural member 32' can be achieved when the first shell 11' and the second shell 12' are assembled to form the outer shell 10 '. Referring again to fig. 1', the cell assembly 20' further includes a plurality of insulating members 22', and one insulating member 22' is disposed between any adjacent cells 21 '. In embodiments of the present application, the insulator 22' includes, but is not limited to, a compressible material such as foam. The insulator 22 'may be used to absorb the expansion volume of the cell 21' during charge and discharge.

With continued reference to fig. 4', 5', 6 'and 7', a second block recess 311 'is formed at an end of the first structural member 31' facing the second structural member 32', a first block protrusion 321' is formed at an end of the second structural member 32 'facing the first structural member 31', and the first block protrusion 321 'is disposed in the second block recess 311' when the first structural member 31 'and the second structural member 32 are assembled to form the first structural member 30'. The first block convex portion 321' and the second block concave portion 311' are mutually matched, which is favorable for improving the connection reliability between the first structural member 31' and the second structural member 32', reducing the problem that the first structural member 31' is separated from the second structural member 32', and maintaining the stability of the first structural member 30 '.

Referring to fig. 6', the first block protrusion 321' includes a first segment 3211 'and a second segment 3212'. The second section 3212' is provided with an inclined surface, and the cross-sectional area of the second section 3212' on the first block convex 321' is gradually reduced along the extending direction of the first block convex 321', i.e. the second direction B, so as to be beneficial to guiding the moving direction of the first block convex 321', and facilitate the first block convex 321' to be inserted into the second block concave 311'. In one embodiment of the present application, when the first structural member 31 'is connected to the second structural member 32', the first segment 3211 'is in interference fit with the second segment recess 311' so as to improve the connection firmness between the first structural member 31 'and the second structural member 32'.

In the embodiment of the present application, a plurality of the first structural members 31 'are disposed between the second portions 2112' of the adjacent cells 21 'at intervals along the first direction a, and each of the first structural members 31' is disposed between the first recesses 2114 'of the adjacent cells 21'. The number of the second structural members 32 'is one-to-one corresponding to the number of the first structural members 31'. When the first structural member 31' and the second structural member 32' are assembled to form the first structural member 30', the first structural member 30' presses the bending portion 2113' toward one side of the cell assembly 20', so as to reduce the shake of the cell 21 '.

In other embodiments, a plurality of first structural members 31 'may be disposed between the second portions 2112' of the adjacent cells 21', so that the first members 30' are disposed in the first concave portions 2114 'and the second concave portions 2115' of the cells 21', thereby increasing the pressing force of the first members 30' on the top of the first portions 2111 'of the cells 21', effectively transmitting the force applied by the cells 21', and further protecting the housing 211'.

Referring to fig. 4 'to 7', the first shell 11 'includes a first side wall 111', the first side wall 111 'has a plurality of first side wall recesses 112', the battery cell 21 'is disposed in the first side wall recess 112' toward one side of the first shell 11, a first side wall protrusion 113 'is disposed between adjacent first side wall recesses 112', and the first structural member 31 'is connected to the first side wall protrusion 113'. The first structural member 31' further includes a first portion 312' and a second portion 313', the first portion 312' is connected to one adjacent to the first sidewall recess 112', and the second portion 313' is connected to the other adjacent to the first sidewall recess 112', thereby increasing the connection area of the first structural member 31' and the first shell 11' to enhance the connection strength of the first structural member 31' and the first shell 11'. In the direction opposite to the second direction B, the length of the first portion 312 'projected on the first side wall 111' in the first direction a does not exceed the length of the first side wall recess 112 'in the first direction a, the length of the second portion 313' projected on the first side wall 111 'in the first direction a does not exceed the length of the first side wall recess 112' in the first direction a, and the end of the first structural member 31 'facing the first case 11' is not connected to the bottommost portion of the first side wall recess 112', thereby facilitating the assembly of the battery assembly 100'.

The second case 12' includes a second sidewall 121', the second sidewall 121' is provided with a plurality of second sidewall recesses 122', and the battery cells 21' are provided in the second sidewall recesses 122' toward the side of the second case 12 '. A second sidewall protrusion 123 'is disposed between adjacent second sidewall recesses 122', and the second structural member 32 'is connected to the second sidewall protrusion 123'. The second structural member 32' further includes a third portion 322' and a fourth portion 323', the third portion 322' is connected to one adjacent to the second sidewall recess 122', and the fourth portion 323' is connected to the other adjacent to the second sidewall recess 122', so as to increase the connection area of the second structural member 32' and the second shell 12', and improve the connection strength of the second structural member 32' and the second shell 12 '. In the second direction B, the length of the third portion 322 'projected on the second side wall 121' in the first direction a does not exceed the length of the second side wall recess 122 'in the first direction a, the length of the fourth portion 323' projected on the second side wall 121 'in the first direction a does not exceed the length of the second side wall recess 122' in the first direction a, and the end of the second structural member 32 'facing the second case 12' is not connected to the bottommost portion of the second side wall recess 122', so that the battery assembly 100' can be assembled more conveniently.

In one embodiment of the present application, the first shell 11 'and the first structural member 31' are integrally formed, and the second shell 12 'and the second structural member 32' may be integrally formed. The integral molding method includes, but is not limited to, injection molding, which enables the first structural member 31 'and the second structural member 32' to better transmit the force received by the battery cell 21', and is also beneficial to reducing the assembly steps of the battery assembly 100', and improving the production efficiency. In other embodiments, the first structural member 31 'may be connected to the first shell 11' by other means, such as snap-fit, screw-fit, adhesive-fit, etc. The second structural member 32 'may be coupled to the second shell 12' by other means, such as snap-fit, screw-fit, adhesive-fit, etc.

Referring to fig. 1' and 8', the battery assembly 100' further includes a circuit board 40' and a connector 41'. The connecting member 41 'is disposed on a side of the first structural member 31' facing away from the battery cells 21', and the electrode terminals 213' of two adjacent battery cells 21 'are connected to the connecting member 41'. The connecting piece 41 'is arranged on one side of the first structural member 31' away from the battery cell 21', and the electrode terminal 213' is also connected to the connecting piece 41 'on the first structural member 31', so that the positioning connection between the battery cell assembly 20 'and the first structural member 30' is realized, and the relative displacement between the first structural member 30 'and the battery cell assembly 20' is reduced. Along the first direction a, the connecting member 41' is further disposed between the adjacent second structural members 32', so that the positive and negative electrode terminals 213' of the battery cells 21' in the battery cell assembly 20' can be connected to the corresponding connecting member 41', and the circuit of the battery cell assembly 20' is maintained to be complete. The plurality of connectors 41 'are also electrically connected to the circuit board 40' to make electrical connection between the cell assembly 20 'and the circuit board 40'. Referring to fig. 4 'and 8', a fourth recess 314 'is formed on a side of the first structural member 31' facing away from the battery cell 21', and the connecting member 41' is disposed in the fourth recess 314', which is beneficial to positioning the connecting member 41' on the first structural member 31', and reduces shaking of the connecting member 41'. The first side wall 111' includes a first supporting portion 114', the circuit board 40' is located on the first supporting portion 114', the first structural member 31' is connected to the first supporting portion 114', and the first structural member 31' and the circuit board 40' are located on two opposite sides of the first supporting portion 114' along the third direction C. The connecting member 41 'includes a first section 411' and a second section 412', the first section 411' being disposed in the fourth recess 314', the first support 114' being disposed between the second section 412 'and the first sidewall recess 112'. The first supporting portion 114 'may assist in positioning the connection member 41' on the one hand, and may also support the connection portion of the connection member 41 'and the circuit board 40' on the other hand.

Further, the connecting member 41 'further includes a third section 413' connecting the first section 411 'and the second section 412', and the third section 413 'is disposed obliquely with respect to the first section 411'. The first supporting portion 114' includes a second inclined surface 1141', and the second inclined surface 1141' is connected to the first structural member 31' to facilitate assembly of the battery assembly 100 '.

Referring to fig. 9', 10' and 11', the electrode terminal 213' includes a connection portion 2131', and the connection portion 2131' is connected to the connection member 41 '. Along the third direction C, the first block protrusion 321 'is at least partially disposed between the connecting portion 2131' and the first portion 2111 'of the battery cell 21', so as to improve the connection strength between the first structural member 31 'and the second structural member 32', so that the first structural member 30 'better presses the housing 211' of the battery cell 21', and improve the impact resistance of the housing 211'. In one embodiment of the present application, along the second direction B, the length of the portion of the first block protrusion 321' between the connecting portion 2131' and the first portion 2111' is greater than 1/2 of the length of the connecting portion 2131', so that the first member 30' can effectively abut against the housing 211' of the battery cell 21' by further defining the dimensional relationship of the first block protrusion 321' inserted into the second block recess 311 '.

Referring to fig. 30, an embodiment of the present application further provides a powered device 200, where the powered device 200 includes the battery assembly 100 or the battery assembly 100' described in the foregoing embodiment. In an embodiment of the present application, the powered device 200 includes, but is not limited to, an electric vehicle, an energy storage device, an unmanned aerial vehicle, an electric tool, and the like.

The above embodiments are only for illustrating the technical solution of the present application and not for limiting, and although the present application has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present application may be modified or substituted without departing from the spirit and scope of the technical solution of the present application.

Claims

A battery assembly, comprising:

a housing;

a battery cell assembly disposed within the housing, the battery cell assembly including a plurality of battery cells stacked in a first direction, the battery cell including a housing, an electrode assembly, and an electrode terminal, the housing including a first portion for receiving the electrode assembly and a second portion extending from a periphery of the first portion;

the battery assembly is characterized by further comprising a first member, wherein the first member comprises an insulating material, and the first member is arranged between the second parts of the adjacent battery cells along the first direction.
The battery assembly of claim 1, wherein the first member comprises a first structural member and a second structural member, the first structural member and the second structural member being removably connected.
The battery assembly of claim 2, wherein the first structural member and the second structural member are interposed in a second direction, the second direction being perpendicular to the first direction.
The battery assembly of claim 2, wherein the first structural member comprises a plurality of first blocks and a plurality of second blocks, the first blocks and the second blocks being alternately arranged along the first direction;

the second structural member comprises a plurality of third blocks and a plurality of fourth blocks, and the third blocks and the fourth blocks are alternately arranged along the first direction;

the third block is detachably connected with the second block, and the fourth block is detachably connected with the first block.
The battery assembly of claim 4, wherein a first block protrusion is provided at an end of each first block facing the second structural member, a second block recess is provided at an end of each fourth block facing the first structural member, and the first block protrusion is inserted into the second block recess.
The battery assembly of claim 5, wherein the first block protrusion comprises a first section and a second section, the first section being connected between the first block and the second section, an outer surface of the second section being provided with a bevel, a cross-sectional area of the second section gradually decreasing from the first block protrusion to the second structural member.
The battery assembly of claim 4, wherein a third block protrusion is disposed at an end of the third block facing the first structural member, a second block recess is disposed at an end of the second block facing the second structural member, and the third block protrusion is inserted into the second block recess.
The battery assembly of claim 4, wherein the electrode terminals are connected to the electrode assembly and extend from the second portion to the first portion, and the electrode terminals of two adjacent cells are connected to a side of the first block or the third block facing away from the cell assembly.
The battery assembly of claim 8, wherein the thickness of the second block is greater than the thickness of the first block, the thickness of the fourth block is greater than the thickness of the third block, and the thickness of the electrode terminal is less than or equal to a distance between an upper surface of the first block and an upper surface of the second block in a third direction.
The battery module of claim 4, wherein a first connecting portion is disposed between adjacent first and second blocks, a first connecting recess is disposed on a side of the first connecting portion facing the battery module, a second connecting portion is disposed between adjacent third and fourth blocks, a second connecting recess is disposed on a side of the second connecting portion facing the battery module, and opposite ends of the second portion are disposed in the first and second connecting recesses, respectively, along a second direction.
The battery pack according to claim 10, wherein a first protruding portion is provided on one side of the first connection recess, a second protruding portion is provided on one side of the second connection recess, bending portions are further provided on opposite sides of the second portion, respectively, and the first protruding portion and the second protruding portion abut against the bending portions.
The battery assembly of claim 10, wherein, in the second direction, a first step surface is provided on a side of the first connection portion facing away from the cell assembly, a second step surface is provided on a side of the second connection portion facing away from the cell assembly, and first protrusions are further provided inside opposite sides of the housing, the first protrusions abutting the first step surface and the second step surface.
The battery assembly of claim 11, wherein first and second recesses are provided on opposite sides of the second portion in the first direction, respectively, the first recess having a depth greater than a depth of the second recess, and the bent portion is provided in the first recess.
The battery pack according to claim 2, wherein the housing includes a first side wall and a second side wall disposed opposite to each other in the second direction, a side of the first side wall facing the battery pack is provided with a plurality of first side wall recesses, a plurality of side edges of the battery cells are provided with a plurality of first side wall recesses, a first side wall protrusion is provided between adjacent first side wall recesses, a side of the first structural member facing the first side wall is provided with a fourth connection recess, and the first side wall protrusion is provided in the fourth connection recess.
The battery assembly of claim 2, further comprising a circuit board disposed on a side of the first structural member and the second structural member facing away from the cell assembly, the circuit board electrically connected to the electrode terminals of the cell assembly, the housing including a second protrusion disposed on a side of the circuit board facing away from the cell assembly.
The battery assembly of claim 2, wherein, in the first direction, opposite ends of the first structural member are provided with a first end and a second end, respectively, and opposite ends of the second structural member are provided with a third end and a fourth end, respectively, the first end being connected to the third end and the second end being connected to the fourth end.
The battery assembly of any one of claims 1-16, wherein the first member has a shore C hardness of 70 degrees or greater.
A powered device comprising the battery assembly of any of claims 1-17.