CN113904055A

CN113904055A - Battery packs and electrical equipment

Info

Publication number: CN113904055A
Application number: CN202111101812.1A
Authority: CN
Inventors: 周权; 吴明杰
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-01-07
Anticipated expiration: 2041-09-18
Also published as: CN113904055B

Abstract

A battery assembly and electric equipment with the battery assembly, the battery assembly includes a shell, an electrode assembly and a first member, the electrode assembly is arranged in the shell, the electrode assembly includes a plurality of battery cells which are stacked along a first direction, the battery cells include a shell, the electrode assembly and electrode terminals, the shell includes a first part for accommodating the electrode assembly and a second part which is formed by extending from the periphery of the first part, the electrode terminals are connected with the electrode assembly and extend out of the first part from the second part, the first member includes insulating materials, the first member is connected with the shell, along the first direction, the first member is arranged between the second parts of the adjacent battery cells, the first member is pressed against the first part of the shell of the battery cells, and when the battery assembly is impacted, the force applied to the battery cells can be transmitted to the shell through the first member, reduce the impact force that the casing of electric core received, promote the protection to the casing.

Description

Battery pack and electric equipment

Technical Field

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

Background

The battery pack with a plurality of cells is influenced by complex service environment in the use process, and the battery pack is easy to be impacted, vibrated or impacted, and at the moment, electrolyte in the cells can impact the cell shell under the action of inertia, so that the protection of the cell shell is further promoted as necessary.

Disclosure of Invention

In view of the above circumstances, the present application provides a battery pack and an electric device having the battery pack that can improve the above problems.

An embodiment of the present application provides a battery pack, including shell, electric core subassembly and first component, the electric core subassembly is located in the shell, the electric core subassembly includes a plurality of electric cores of piling up the setting along first direction, the electric core includes casing, electrode assembly and electrode terminal, the casing is including being used for acceping the first portion of electrode assembly and certainly the first portion is peripheral to be extended the second portion that forms, electrode terminal connect in electrode assembly and certainly the second portion extends the first portion, first component includes insulating material, follows the first direction, first component is located adjacently the electric core between the second portion. The embodiment of the application comprises the following technical effects: through setting up first component between the second part of adjacent electric core along first direction, make first component support the first part of pressing the casing of electric core, when battery pack received the impact, on the power that electric core received can transmit the shell through first component, reduced the impact force that the casing of electric core received, promoted 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: utilize first structure and the concatenation of second structure to form first component, reduce the installation degree of difficulty of first component, improve production efficiency.

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

In some embodiments, the first structure member includes 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, so that the connection strength between the first structural member and the second structural member is improved.

In some embodiments, each of the first blocks has a first block convex portion at an end facing the second structural member, and each of the fourth blocks has a second block concave portion at an end facing the first structural member, and the first block convex portion is inserted into the second block concave portion. 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 member and the second structural member is improved.

In some embodiments, the first block protrusion comprises 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 is gradually reduced 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 inserted, the second section is used for guiding the moving direction of the first block convex part, the difficulty of matching 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 convex portion is disposed at an end of the third block facing the first structural member, a second block concave portion is disposed at an end of the second block facing the second structural member, and the third block convex portion is inserted into the second block concave portion. Technical effects included in some embodiments of the present application: the convex part of the third block is matched with the concave part of the second block, so that the connection reliability between the first structural member and the second structural member is further improved.

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

In some embodiments, in the third direction, a thickness of the second block is greater than a thickness of the first block, a thickness of the fourth block is greater than a thickness of the third block, and a thickness of the electrode terminal is equal to or less than 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 pack is assembled, the surface of the electrode terminal does not exceed the surface of the first member, so that the overall dimension of the battery pack is reduced, and the energy density is improved.

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

In some embodiments, a first protruding portion is disposed on one side of the first connecting concave portion, a second protruding portion is disposed on one side of the second connecting concave portion, bending portions are disposed on two opposite sides of the second portion, and 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 damaging the shell of the battery cell is reduced.

In some embodiments, along the second direction, one side that first connecting portion deviates from electricity core subassembly is equipped with first step face, one side that second connecting portion deviate from electricity core subassembly is equipped with second step face, the inside first convex part that still is equipped with of the relative both sides of shell, first convex part support hold connect in first step face with second step face. Technical effects included in some embodiments of the present application: the first convex part of shell supports first step face and the second step face of holding on the first component, is favorable to transmitting the power that the electricity core received to the shell on the one hand, and on the other hand can spacing first component, reduces the problem that first component takes place the displacement.

In some embodiments, along the first direction, two opposite sides of the second portion are respectively provided with a first concave portion and a second concave portion, a depth of the first concave portion is greater than a depth of the second concave portion, and the bent portion is provided in the first concave portion. Technical effects included in some embodiments of the present application: locate the pit side of electric core with the kink, can reduce the protruding circumstances of stretching out electric core surface of second part, promote the energy density of electric core.

In some embodiments, along the second direction, the housing includes a first sidewall and a second sidewall that are opposite to each other, a side of the first sidewall facing the battery cell assembly is provided with a plurality of first sidewall recesses, a plurality of sides of the battery cells are provided in the plurality of first sidewall recesses, a first sidewall protrusion is provided between adjacent first sidewall recesses, a side of the first structural member facing the first sidewall is provided with a fourth connecting recess, and the first sidewall protrusion is provided in the fourth connecting 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 a profile groove for positioning a plurality of battery cores in the battery core assembly and reducing the shaking of the battery core assembly in the shell. 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 includes a circuit board disposed on a side of the first structural member and the second structural member away from the electric core assembly, the circuit board is electrically connected to the electrode terminals of the electric core assembly, and the housing includes a second protrusion disposed on a side of the circuit board away from the electric core assembly. Technical effects included in some embodiments of the present application: the circuit board can be used for detecting and controlling the charging condition of the electric core assembly, the second convex part is matched with the circuit board, the circuit board can be positioned, and the circuit board can be used as another force transmission structure, so that the force transmitted to the shell by the electric core assembly is facilitated.

In some embodiments, along the first direction, opposite ends of the first structural member are respectively provided with a first end portion and a second end portion, opposite ends of the second structural member are respectively provided with a third end portion and a fourth end portion, the first end portion is connected with the third end portion, and the second end portion is connected with the fourth end portion. Technical effects included in some embodiments of the present application: the two ends of the first structural member and 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 hardness C of the first member is greater than or equal to 70 degrees, so as to facilitate transmission of an impact force applied to the cell casing to the casing.

Embodiments of the present application further provide a battery assembly, including a housing and an electric core assembly disposed in the housing, the electric core assembly includes a plurality of electric cores stacked along a first direction, each electric core includes a casing, an electrode assembly and an electrode terminal, the casing includes a first portion for accommodating the electrode assembly and a second portion formed by extending from the periphery of the first portion, and the electrode terminal is connected to the electrode assembly and extends from the second portion to the first portion. The battery assembly further includes a first member including an insulating material, the first member being coupled to the housing, the first member being disposed between the second portions of adjacent cells in 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 between the second part of adjacent electric core along the first direction, make first component support the first part of the casing of pressing electric core, when battery pack received the impact, on the power that electric core received can transmit the shell through first component, reduced the impact force that electric core casing received, promoted 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 oppositely disposed along a second direction, the first structural member connects the first shell, the second structural member connects the second shell, and the first structural member is oppositely disposed along the second direction. Technical effects included in some embodiments of the present application: the first structural member and the second structural member are connected with the first shell and the second shell respectively, 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, the first structural member is provided with a first recess at an end facing the second structural member, and the second structural member is provided with a first projection at an end facing the first structural member, the first projection being provided in the first recess. Technical effects included in some embodiments of the present application: the first protruding block and the first concave part are matched with each other, so that the connection reliability between the first structural member and the second structural member is improved.

In some embodiments, the first bump includes a first section and a second section, and a cross-sectional area of the first bump is gradually reduced along an extending direction of the first bump.

In some embodiments, a plurality of the first structural members are arranged between the second portions of the adjacent battery cells at intervals, and the number of the second structural members corresponds to that of the first structural members. Technical effects included in some embodiments of the present application: let a plurality of first structure pieces and a plurality of second structure piece pair one by one connect, can promote the intensity of first structure piece on the one hand, 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 component, the first conductive component is 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 component. Technical effects included in some embodiments of the present application: first electrically conductive piece is used for realizing the electricity of circuit board or external circuit component and electric core, locates first electrically conductive piece and deviates from one side of first structure spare the electric core, the cover is established on first structure spare when can letting electrode terminal connect, realizes the location between electric core subassembly and the first component and is connected, reduces the relative displacement between first component and the electric core subassembly.

In some embodiments, the battery assembly further includes a first conductive member disposed between adjacent second structural members along the first direction. Technical effects included in some embodiments of the present application: let the positive negative pole electrode terminal homoenergetic of electricity core connect corresponding first electrically conductive, maintain the circuit of electricity core subassembly complete.

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

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

In some embodiments, the first case includes a first side wall, the first side wall is provided with a plurality of first recesses, one side of the battery core facing the first case is provided with the first recesses, a first protrusion is provided between adjacent first recesses, and the first structural member is connected to the first protrusion. Technical effects included in some embodiments of the present application: positioning of the first structural member with the first shell is facilitated.

In some embodiments, the first structural member includes a first subsection connected to one adjacent the first recess and a second subsection connected to the other adjacent the first recess, a length of the first subsection in the first direction projected on the first sidewall does not exceed a length of the first recess in the first direction, and a length of the second subsection in the first direction projected on the first sidewall does not exceed a length of the first recess in the first direction, in a direction opposite the second direction. Technical effects included in some embodiments of the present application: the second section is not connected to the lowermost portion of the first recess, which facilitates assembly of the housing.

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

In some embodiments, the first shell and the first structural member are a unitary structure and the second shell and the second structural member are a unitary structure. Technical effects included in some embodiments of the present application: the mode of integrated into one piece can be injection moulding, and the impact force that 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 portion is disposed between the second section and the first recess. Technical effects included in some embodiments of the present application: the supporting portion can assist in positioning the first conductive member on one hand, and can also support the connection position of the first conductive member and the circuit board on the other hand.

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

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

In some embodiments, the first protrusion is at least partially disposed between the connection portion and the first portion along the second direction, and a length of a portion of the first protrusion disposed between the connection portion and the first portion is greater than 1/2 of the length of the connection portion. Technical effects included in some embodiments of the present application: the size relation that the first bump is inserted into the first concave part is further limited, and the first component can effectively abut against the shell of the battery cell.

In some embodiments, the second case includes a second side wall, the second side wall is provided with a plurality of second recesses, one side of the battery core facing the second case is provided with the second recesses, a second protrusion is provided between adjacent second recesses, and the second structural member is connected to the second protrusion.

In some embodiments, along the second direction, two opposite sides of the second portion are further respectively provided with a bending portion, and the first member abuts against the bending portion. 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 the friction of the second part is solved.

The embodiment of the application also provides electric equipment, and the electric equipment comprises the battery assembly in the embodiment. The electric equipment includes but is not limited to electric vehicles, storage equipment, unmanned aerial vehicles, electric tools and the like.

Above-mentioned battery pack makes first component support the first part of the casing of pressing electric core through setting up first component between the second part of adjacent electric core, and when battery pack received the impact, the power that electric core received can transmit the shell through first component on, reduces the impact force that the casing of electric core received, promotes the protection to the casing.

Drawings

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

Fig. 2 is an exploded view of the battery module shown in fig. 1.

Fig. 3 is an exploded schematic view of a battery cell in the battery assembly shown in fig. 2.

Fig. 4 is a schematic view showing the structure of the cell assembly and the first member in the battery module shown in fig. 1.

Fig. 5 is an enlarged view of a portion 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 portion of the structure shown in fig. 6.

Fig. 8 is a top view of the first member of the battery assembly of fig. 2, wherein the first, second, third, fourth, etc. sections 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 cross-sectional view of the first member shown in fig. 8.

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

Fig. 12 is a schematic structural diagram of a battery cell 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 cell assembly and the first member in another direction in the battery module of fig. 1.

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

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

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

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

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

Fig. 21 is an enlarged view of a portion of the battery module shown in fig. 20.

Fig. 22 is a schematic structural view of the battery module shown in 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 structural view of the battery assembly shown in fig. 1 with the housing removed.

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

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

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

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

Fig. 29 is a sectional view of the battery module of fig. 1 cut away a portion of the second side wall of the second case in a second direction.

Fig. 30 is an exploded view of a battery assembly in one embodiment.

Fig. 31 is a side view of the battery assembly of fig. 30 with the wire harness assembly removed.

Fig. 32 is a schematic sectional view of the battery module shown in fig. 31, in which the structure in the dotted circle is a partially enlarged view of the sectional structure.

Fig. 33 is a schematic view of a first case of the outer case of the battery module shown in fig. 30.

Fig. 34 is a schematic view showing the structure of the first case shown in fig. 33 in another direction, and the structure in the dotted circle is a partially enlarged view of the first case.

Fig. 35 is a schematic view of a second case of the outer case of the battery module shown in fig. 30.

Fig. 36 is a schematic view showing the structure of the second case shown in fig. 35 in another direction, and the structure in the dotted circle is a partially enlarged view of the second case.

Fig. 37 is a schematic structural view of the battery module shown in fig. 30 with a portion of the structure removed, and the structure in the dotted circle is a partially enlarged view.

Fig. 38 is a side view of the battery assembly of fig. 30 with the wire harness assembly removed.

Fig. 39 is a schematic sectional view of the battery module shown in fig. 38, in which the structure in the dotted circle is a partially enlarged view of the sectional structure.

Fig. 40 is a schematic cross-sectional view of the battery module of fig. 38 in another direction, wherein the structure in the dotted circle is a partially enlarged view of the cross-sectional structure.

Fig. 41 is a schematic structural diagram of a battery cell in the battery assembly shown in fig. 30.

Fig. 42 is a schematic structural view of the first and second shells before they are joined, with the top portion of the structure removed.

Fig. 43 is a schematic sectional view of the first and second cases after they are joined.

Fig. 44 is a schematic diagram of a powered device in an embodiment.

Description of the main element symbols:

battery pack of 100,100'

Shell

10, 10'

First shell

11, 11'

First side wall 111, 111'

First side wall recesses 112, 112'

First sidewall projections 113, 113'

First ceiling wall 114

First bottom wall 115

First end wall 116

First opening 1161

First support part 114'

Second inclined surface 1141'

Second end wall 117

Second Shell 12, 12'

Second side wall 121, 121'

Second side wall recess 122, 122'

Second sidewall projections 123,123'

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

Electric core assembly 20, 20'

Cell core 21, 21'

Case 211, 211'

First portion 2111,2111'

Second portion 2112,2112'

First housing 211a

Second housing 211b

First region 211c

Second region 211d

A bent part 2113,2113'

First recessed portions 2114, 2114'

Second recessed portions 2115, 2115'

Electrode assembly 212

Electrode terminals

213a, 213b

Connecting part 2131'

Insulation 22, 22'

First member 30, 30'

First

structural member

31, 31'

First block 311

Surface 3111

Second block 312

First protruding portion 3121

First block convex part 313,321'

First section 3131,3211'

Second segment 3132,3212'

Inclined plane 3133

Second block recesses 314, 311'

First part 312'

Second partition part 313'

Fourth recessed portion 314'

First connection 315

First coupling recess 3151

First protrusion 3152

First step surface 3153

Fourth connecting recess 316

First end 317

First inclined surface 3171

Second end 318

Second

structural member

32, 32'

Third block 321

Fourth block 322

Second protruding portion 3221

Fourth block recess 323

Third block protrusion 324

Second connection portion 325

Second connection concave portion 3251

Second convex portion 3252

Second step surface 3253

Sixth connecting recess 326

Third end portion 327

Third concave part 3271

Fourth end 328

Third subcomponent 322'

Fourth division part 323'

Circuit board 40, 40'

Connecting piece 41, 41'

First section 411'

Second segment 412'

Third stage 413'

Chip 42

Wire harness assembly 50

First end 51

Second end 52

Connector 53

Power utilization device 200

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present application will be clearly and completely 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 "secured 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 as used herein are 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 present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

An embodiment of the application provides a battery assembly, which comprises a shell, an electric core assembly and a first member. The battery cell assembly is arranged in the shell and 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 portion used for accommodating the electrode assembly and a second portion formed by extending the periphery of the first portion, and the electrode terminal is connected with the electrode assembly and extends out of the first portion from the second portion. The first member comprises an insulating material, the first member is arranged between the second portions of the adjacent battery cells along the first direction, and the Shore hardness of the first member is greater than or equal to 70 degrees.

Above-mentioned battery pack makes first component support the first part of the casing of pressing electric core through setting up the first component of shorea hardness more than or equal to 70 degrees between the second part of adjacent electric core, and when battery pack received the impact, the power that electric core received can transmit the shell through first component on, promotes the protection to electric core casing.

Some embodiments of the present application are described in detail. In the following embodiments, features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 and 2,3 and 11, in one embodiment of the present application, a battery assembly 100 includes an outer case 10, a battery cell assembly 20 and a first member 30. The battery pack 20 is disposed in the housing 10, and the battery pack 20 includes a plurality of battery cells 21 stacked along a first direction a. The battery cell 21 includes a casing 211, an electrode assembly 212, and an electrode terminal 213, where the casing 211 includes a first portion 2111 for receiving the electrode assembly 212 and a second portion 2112 formed by extending from the periphery of the first portion 2111. The electrode assembly 212 includes a winding type structure formed by winding a positive electrode tab, a negative electrode tab, 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 battery cell 21 includes a first concave portion 2114 and a second concave portion 2115 which are disposed on opposite sides of the second portion 2112. The first and

second recesses

2114 and 2115 are formed by first and

second portions

2111 and 2112. The two

electrode terminals

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

electrode terminals

213a, 213b have opposite polarities, wherein the electrode terminal 213a may be a positive electrode, and the electrode terminal 213b may be a negative electrode. The first member 30 comprises an insulating material. Optionally, the first member 30 includes foam, such as EVA foam, with a vinyl acetate content of 5% to 45%. Alternatively, the first member 30 is made of an insulating material. Alternatively, the first member 30 is made of an insulating material and a metal material. Along 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 subjected to an impact, vibration or impact, a force applied to the battery cells 21 can be transmitted to the housing 10 through the first member 30, an impact force applied to the housing 211 at the first concave portion 2114 and the second concave portion 2115 is reduced, and 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. Alternatively, the first structural member 31 and the second structural member 32 may be 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 core 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 battery core assembly 20 further includes a plurality of insulating members 22, and one insulating member 22 is disposed between any adjacent battery cells 21. In the embodiment of the present application, the insulation 22 includes, but is not limited to, a compressible material such as foam. The insulating member 22 may be used to absorb the expansion volume of the battery cell 21 during charging and discharging.

Referring to fig. 4, 5, 6 and 7, the first structural member 31 and the second structural member 32 are connected in an opposite insertion manner along a second direction B, where the second direction B 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 structure 32 includes a plurality of third blocks 321 and a plurality of fourth blocks 322, and the fourth blocks 322 and the third blocks 321 are alternately arranged 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.

Referring 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 structure 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 structure member 31. Each third block 321 is provided with a third block convex portion 324 at one end facing the first structural member 31, and each second block 312 is provided with a second block concave portion 314 corresponding to the third block convex portion 324 at one end facing the second structural member 32. When the first member 30 is formed by connecting the first structure member 31 and the second structure member 32, the first block convex portion 313 is inserted into the fourth block concave portion 323. The third block protrusion 324 is inserted into the second block recess 314. The first block convex part 313 and the fourth block concave part 323 are matched with each other, and the third block convex part 324 and the second block concave part 314 are matched with each other, which is beneficial to improving the connection reliability between the first structural member 31 and the second structural member 32.

Further, referring to fig. 6 to 11 again, the first block protrusion 313 includes a first section 3131 and a second section 3132 connected together. An outer surface of the second section 3132 is provided with a slope 3133, and a cross-sectional area of the second section 3132 decreases gradually along a second direction B perpendicular to the first direction a. When the first block protrusion 313 and the fourth block recess 323 are plugged, the second section 3132 may be used to guide the moving direction of the first block protrusion 313, so as to reduce the difficulty of mating the first block protrusion 313 and the fourth block recess 323, and facilitate the first block protrusion 313 to be inserted into the fourth block recess 323. The structure of the third block protrusion 324 is similar to that of the first block protrusion 313, and is a two-segment structure with different cross-sectional dimensions, and the structure of the third block protrusion 324 is not described herein again.

Along the first direction a, the first structural member 31 has a first end 317 and a second end 318 at two opposite ends thereof, and the second structural member 32 has a third end 327 and a fourth end 328 at two opposite ends thereof. When the first structure member 31 and the second structure member 32 are connected to each other by mating, the first end portion 317 is connected to the third end portion 327, and the second end portion 318 is connected to the fourth end portion 328. The embodiment of the present application can further improve the connection strength between the first structural member 31 and the second structural member 32 by fitting both ends of the first structural member 31 and the second structural member 32 to each other.

Along the second direction B, the length of the first end portion 317 is greater than that of the third end portion 327, a third concave portion 3271 is disposed at an end of the third end portion 327 facing the first end portion 317, and an end of the first end portion 317 facing the third end portion 327 is inserted into the third concave portion 3271. The inner side surface of the first end portion 317 is further provided with a first inclined surface 3171 which can be used for guiding the moving direction of the first end portion 317 inserted into the third concave portion 3271, and reducing the matching difficulty between the first end portion 317 and the third end portion 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 when the first structural member 31 is connected to the second structural member 32, the second end 318 and the fourth end 328 are connected in an opposite insertion manner.

Referring to fig. 4, 5, 10 and 11 again, the electrode terminals 213 of two adjacent battery cells 21 are connected to each other at the surface 3111 of the first section 311 of the first structural member 31, which faces away from the battery assembly 20, or the electrode terminals 213 of two adjacent battery cells 21 are connected to each other at the side of the third section 321 of the second structural member 32, which faces away from the battery assembly 20. In a third direction C, the thickness D2 of the second block 312 is greater than the thickness D1 of the first block 311, the thickness D4 of the fourth block 322 is greater than the thickness D3 of the third block 321, and the third direction C is perpendicular to both the first direction a and the second direction B. In the third direction C, the electrode terminal 213 may not extend beyond the second and

fourth blocks

312 and 322, and the external size of the battery assembly 100 may be reduced, thereby increasing the energy density.

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 at two opposite sides of the first block 311, the first protruding portions 3121 are disposed at an end of the first block 311 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 a connector 41 connected to the electrode terminal 213, and the connector 41 includes, but is not limited to, a conductive sheet and may be made of a metal material. The second structure 32 includes a plurality of second protruding portions 3221, the second protruding portions 3221 are disposed at two opposite sides of the third block 321, the second protruding portions 3221 are located at an end of the third block 321 departing from the first structure 31, and the second protruding portions 3221 protrude from an upper surface of the third block 321. The two second protrusions 3221 of the third section 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 the second protruding portion 3221 is connected to the second block 312 or the fourth block 322, and the other end abuts against the electrode terminal 213 connected to each other, so as to position the electrode terminal 213 and the first member 30.

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

Along second direction B, the two opposite sides of second portion 2112 are also equipped with kink 2113 respectively, kink 2113 is located first recess 2114 is favorable to reducing the protruding circumstances that stretches out electric core 21 surface of second portion 2112, reduces the risk of kink 2113 damage. In the battery assembly 20, between adjacent battery cells 21, the first concave portion 2114 of one battery cell 21 is disposed opposite to the first concave portion 2114 of another battery cell 21, or the first concave portion 2114 of one battery cell 21 is disposed opposite to the second concave portion 2115 of another battery cell 21. In an embodiment of the application, the bent portion 2113 may be formed by extruding the second portions 2112 on two sides of the battery 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 an opposite insertion manner. After the first structural member 31 and the second structural member 32 are installed, the abutting and limiting effects on the bent portion 2113 can be realized. In other embodiments, the bent portion 2113 may be formed by mechanically pressing before the first structural member 31 and the second structural member 32 are mounted, so as to reduce resistance of the first structural member 31 and the second structural member 32 during the mounting 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 bent portion 2113 to limit movement of the bent portion 2113. Optionally, in the third direction C, a projection of the bent portion 2113 at least partially overlaps a projection of the first structural member 31 to limit movement of the bent portion 2113. Optionally, along the third direction C, the projection of the bent portion 2113 at least partially overlaps the projection of the second structural member 32 to limit the movement of the bent portion 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 first block 311 and the second block 312, and the first connection portion 315 includes a first connection recess 3151 disposed at a side close to the power core 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 portion 3251 disposed at a side close to the electric core assembly 20. Along the second direction B, the opposite ends of the second portion 2112 of the battery cell 21 are respectively disposed in the first connection concave portion 3151 and the second connection concave portion 3251, so that the first member 30 can adapt to the external shape structure of the battery core assembly 20, and the relative movement between the first member 30 and the battery core assembly 20 is reduced.

Further, a first protrusion 3152 is disposed on one side of the first coupling recess 3151, and a second protrusion 3252 is disposed on one side of the second coupling recess 3251. When the first structural member 31 and the second structural member 32 are mounted on the battery core assembly 20, the first protruding portion 3152 and the second protruding portion 3252 abut against the bent portions 2113 at two opposite ends of the second portion 2112 of the battery core 21, so as to reduce the shaking of the second portion 2112 in the battery core 21, and reduce the risk of damaging the housing 211 of the battery core 21.

Edge third direction C, first connecting portion 315 deviates from one side of electricity core subassembly 20 is equipped with first step face 3153, second connecting portion 325 deviates from one side of electricity core subassembly 20 is equipped with second step face 3253. The housing 10 is further provided with first protrusions 13 inside opposite sides thereof, and the first protrusions 13 are connected to 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 beneficial to transmitting the force received by the battery cell 21 to the housing 10 through the first member 30, and on the other hand, can limit the first member 30 and the housing 10, thereby reducing the problem of displacement of the first member 30.

Referring to fig. 2,22 and 23, along the second direction B, the housing 10 includes a first shell 11 and a second shell 12 connected to each other, the first shell 11 includes a first sidewall 111, the second shell 12 includes a second sidewall 121, and the first sidewall 111 and the second sidewall 121 are disposed opposite to each other along the second direction B. A plurality of first sidewall recesses 112 are formed in one side of the first sidewall 111 facing the battery cell assembly 20, and a plurality of first sidewall recesses 112 are formed in the side of the battery cell 21. A first side wall convex part 113 is arranged between the adjacent first side wall concave parts 112, and the first side wall concave part 112 and the first side wall convex part 113 are combined to form a profile groove for positioning the plurality of cells 21 in the cell assembly 20 and reducing the shaking of the cell assembly 20 in the casing 10. The first structure member 31 is provided with a plurality of fourth coupling recesses 316 on a side facing the first side wall 111, the first side wall protrusions 113 are provided in the fourth coupling recesses 316, and the fourth coupling recesses 316 restrict movement of the first structure member 31. A plurality of second sidewall recesses 122 are also formed in a side of the second sidewall 121 facing the battery cell assembly 20, the second sidewall recesses 122 correspond to the first sidewall recesses 112 in position, and a plurality of second sidewall recesses 122 are formed in a side of the battery cell 21 away from the first sidewall 111. And a second side wall convex part 123 is arranged between the adjacent second side wall concave parts 122, and a profile groove is formed on the second side wall 121 by the second side wall concave part 122 and the second side wall convex part 123, and the profile groove on the first side wall 111 cooperate to clamp and position the electric core assembly 20, so that the stability of the electric core assembly 20 in the housing 10 is further improved. The second structure 32 is further provided with a plurality of sixth connecting recesses 326 on a side facing the second side wall 121, the second side wall protrusions 123 are disposed in the sixth connecting recesses 326, and the sixth connecting recesses 326 can limit the movement of the second structure 32.

Referring to fig. 2, 19 to 21, and 22 to 29, the battery assembly 100 further includes a circuit board 40, the battery pack 20 is electrically connected to the circuit board 40, and the circuit board 40 is provided with a chip 42 including a plurality of electronic circuit elements, for controlling the charging and discharging current of the battery pack 20 and monitoring the charging and discharging temperature of the battery pack 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 electrical core assembly 20. The circuit board 40 electrically connects the electrode terminals 213 of the electric core 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 close to the electric core 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 electric core assembly 20. The circuit board 40 can be used for detecting and controlling the charging and discharging conditions of the cell assembly 20, and the first protrusion 13 and the circuit board 40 are mutually matched, so that the circuit board 40 can be used as another force transmission structure, which is beneficial to transmitting the force received by the cell assembly 20 to the outer shell 10.

The first case 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 around 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 oppositely arranged and detachably connected, the first bottom wall 115 and the second bottom wall 125 are oppositely arranged and detachably connected, the first end wall 116 and the third end wall 126 are oppositely arranged and detachably connected, and the second end wall 117 and the fourth end wall 127 are oppositely arranged and detachably connected. The first protruding portion 13 and the second protruding portion 14 are disposed on the first sidewall 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 sidewall 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 that the heat dissipation area of the housing 10 is increased, and the heat dissipation performance of the battery assembly 100 is improved.

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

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

Referring to fig. 30 and 41, in another embodiment of the present application, the battery pack of the present embodiment is similar to the battery assembly 100 of the previous embodiment, and repeated descriptions of the same or similar structures as those of the battery assembly 100 of the previous embodiment will be omitted in this embodiment, and the present embodiment focuses on the differences between the previous embodiments. The same parts as those of the battery assembly 100 are assigned the same reference numerals, and detailed description is omitted, and the same reference numerals are assigned with a distinguishing symbol' in the present embodiment for further distinction. The first member 30 'is connected with the housing 10' and has a shore hardness C of 70 degrees or more. Along the first direction a, the first member 30 ' is provided between the second portions 2112 ' of the adjacent battery cells 21 '. When the battery assembly 100 'is impacted, the force applied to the battery cell 21' can be transmitted to the casing 10 'through the first member 30', the force which impacts the casing 211 'of the battery cell 21' is transferred to the casing 10 ', the impact force applied to the weak area at the top of the casing 211' of the battery cell 21 'is reduced, and the protection of the casing 211' is improved.

With continued reference to fig. 31,32, 42 and 43, an end of the first structural member 31 'remote from the second structural member 32' is connected to the first shell 11 ', and an 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 and second

structural members

31 ', 32 ' to the first and second shells 11 ', 12 ', respectively, assembly of the first and second

structural members

31 ', 32 ' is achieved when the first and second shells 11 ', 12 ' are assembled to form the outer shell 10 '. Referring again to fig. 30, 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 the embodiment of the present application, the insulation 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 charging and discharging.

With reference to fig. 33, 34, 35 and 36, a second block concave portion 311 'is disposed at an end of the first structural member 31' facing the second structural member 32 ', a first block convex portion 321' is disposed at an end of the second structural member 32 'facing the first structural member 31', and the first block convex portion 321 'is disposed in the second block concave portion 311' when the first structural member 31 'and the second structural member 32 are assembled into the first structural member 30'. The first block convex part 321 ' and the second block concave part 311 ' are mutually matched, which is beneficial to improving the connection reliability between the first structural member 31 ' and the second structural member 32 ', reducing the problem of separation of the first structural member 31 ' and the second structural member 32 ', and maintaining the stability of the first structural member 30 '.

Referring to fig. 35 again, the first block protrusion 321 ' includes a first segment 3211 ' and a second segment 3212 '. The second segment 3212 ' is provided with an inclined surface, and along the extending direction of the first block protrusion 321 ', i.e. the second direction B, the cross-sectional area of the second segment 3212 ' on the first block protrusion 321 ' is gradually reduced, which is beneficial to guiding the moving direction of the first block protrusion 321 ' and facilitating the insertion of the first block protrusion 321 ' into the second block recess 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 'and the second block recess 311' are in interference fit, so as to improve the connection between the first structural member 31 'and the second structural member 32'.

In the embodiment of the present application, along the first direction a, a plurality of the first structural members 31 'are disposed at intervals between the second portions 2112' of the adjacent battery cells 21 ', and each of the first structural members 31' is disposed between the first concave portions 2114 'of the adjacent battery cells 21'. The number of the second structural members 32 'corresponds to the number of the first structural members 31' one by one. 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 bent portion 2113 ' toward one side of the electric core assembly 20 ', so as to reduce the shaking of the electric core 21 '.

In other embodiments, a plurality of the first structural members 31 'may also be disposed between the second portions 2112' of the cells 21 'that are arbitrarily adjacent to each other, so that the first members 30' are disposed in the first concave portions 2114 'and the second concave portions 2115' of the cells 21 ', and thus the pressing force of the first members 30' against the tops of the first portions 2111 'of the cells 21' is increased, the force applied to the cells 21 'is effectively transmitted, and the housing 211' is further protected.

Referring to fig. 33 to 36 again, the first case 11 ' includes a first sidewall 111 ', the first sidewall 111 ' has a plurality of first sidewall recesses 112 ', the cell 21 ' is disposed in the first sidewall recesses 112 ' toward one side of the first case 11 ', a first sidewall protrusion 113 ' is disposed between adjacent first sidewall recesses 112 ', and the first structural member 31 ' is connected to the first sidewall protrusion 113 '. The first structural member 31 ' further includes a first subsection 312 ' and a second subsection 313 ', the first subsection 312 ' is connected to one adjacent to the first sidewall recess 112 ', and the second subsection 313 ' is connected to the other adjacent to the first sidewall recess 112 ', so that a connection area of the first structural member 31 ' and the first shell 11 ' is increased to improve a connection strength of the first structural member 31 ' and the first shell 11 '. In a direction opposite to the second direction B, a length of the first division 312 'projected on the first side wall 111' in the first direction a does not exceed a length of the first side wall recess 112 'projected on the first direction a, a length of the second division 313' projected on the first side wall 111 'in the first direction a does not exceed a length of the first side wall recess 112' projected on the first direction a, and an end of the first structural member 31 'facing the first case 11' is not connected to a bottommost portion of the first side wall recess 112 ', which facilitates 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 a side of the battery cell 21 ' facing the second case 12 ' is provided with the second sidewall recesses 122 '. 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 structure 32 ' further includes a third subsection 322 ' and a fourth subsection 323 ', the third subsection 322 ' is connected to one adjacent to the second sidewall recess 122 ', and the fourth subsection 323 ' is connected to the other adjacent to the second sidewall recess 122 ', so that the connection area of the second structure 32 ' and the second shell 12 ' is increased, and the connection strength of the second structure 32 ' and the second shell 12 ' is improved. Along the second direction B, the length of the third subsection 322 'projected on the second sidewall 121' in the first direction a does not exceed the length of the second sidewall recess 122 'projected on the first direction a, the length of the fourth subsection 323' projected on the second sidewall 121 'in the first direction a does not exceed the length of the second sidewall recess 122' projected on the first direction a, and one end of the second structural member 32 'facing the second case 12' is not connected to the bottommost portion of the second sidewall recess 122 ', so that the battery assembly 100' is more conveniently assembled.

In one embodiment of the present application, the first shell 11 'and the first structural member 31' are an integrally formed structure, and the second shell 12 'and the second structural member 32' may also be an integrally formed structure. The integral molding manner 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 applied to the battery cell 21 ', and also facilitates 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 fastening, screw fastening, adhesive fastening, etc. The second structure 32 'may be connected to the second housing 12' by other means, such as snap-fit, screw, adhesive, etc.

Referring to fig. 30 and 37, the battery pack 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' 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 member 41 'is disposed on a side of the first structural member 31' away from the battery cell 21 ', and the electrode terminal 213' is also connected to the connecting member 41 'on the first structural member 31', so as to realize positioning connection between the battery cell assembly 20 'and the first structural member 30', and reduce relative displacement between the first structural member 30 'and the battery cell assembly 20'. 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 cell 21 ' in the battery cell assembly 20 ' can be connected to the corresponding connecting member 41 ', and the circuit integrity of the battery cell assembly 20 ' is maintained. A plurality of said connectors 41 'also electrically connect said circuit board 40' to achieve an electrical connection between the electrical core assembly 20 'and the circuit board 40'. Referring to fig. 33 and 37, a fourth recess 314 'is formed in a side of the first structural member 31' away from the battery cell 21 ', and the connecting member 41' is disposed in the fourth recess 314 ', so as to facilitate positioning of the connecting member 41' on the first structural member 31 'and reduce shaking of the connecting member 41'. The first sidewall 111 ' includes a first support portion 114 ', the circuit board 40 ' is positioned on the first support portion 114 ', the first structural member 31 ' is connected to the first support portion 114 ', and the first structural member 31 ' and the circuit board 40 ' are positioned on opposite sides of the first support portion 114 ' in the third direction C. The connector 41 'includes a first segment 411' and a second segment 412 ', the first segment 411' is disposed in the fourth recess 314 ', and the first support portion 114' is disposed between the second segment 412 'and the first sidewall recess 112'. The first supporting portion 114 ' can assist in positioning the connecting member 41 ' on the one hand, and the first supporting portion 114 ' can also support the connecting position of the connecting member 41 ' and the circuit board 40 ' on the other hand.

Further, the connecting member 41 'further includes a third segment 413' connecting the first segment 411 'and the second segment 412', and the third segment 413 'is disposed obliquely with respect to the first segment 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 ', so as to facilitate assembly of the battery assembly 100 '.

Referring to fig. 38, 39 and 40, the electrode terminal 213 'includes a connection part 2131', and the connection part 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' 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 the impact resistance of the housing 211' is improved. In one embodiment of the present application, along the second direction B, the length of the portion of the first block protruding portion 321 ' between the connecting portion 2131 ' and the first portion 2111 ' is greater than 1/2 of the length of the connecting portion 2131 ', and the size relationship of the first block protruding portion 321 ' inserted into the second block recessed portion 311 ' is further defined, so that the first member 30 ' can effectively support the housing 211 ' of the battery cell 21 '.

Referring to fig. 44, an electric device 200 is further provided in an embodiment of the present application, where the electric device 200 includes the battery assembly 100 or the battery assembly 100' described in the foregoing embodiment. In the embodiment of the present application, the electric device 200 includes, but is not limited to, an electric vehicle, an energy storage device, a drone, an electric tool, and the like.

Although the present application has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the present application.

Claims

1. A battery assembly, comprising:

a housing;

the battery core assembly is arranged in the shell and comprises a plurality of battery cells stacked along a first direction, each battery cell comprises a shell, an electrode assembly and an electrode terminal, each shell comprises a first part for accommodating the electrode assembly and a second part formed by extending from the periphery of the first part, and each electrode terminal is connected to the electrode assembly and extends out of the first part from the corresponding second part;

wherein the battery assembly further comprises a first member comprising an insulating material, the first member being coupled to the housing, the first member being disposed between the second portions of adjacent cells along the first direction.

2. The battery assembly of claim 1, wherein the first structure comprises a first structure and a second structure, the housing comprises a first shell and a second shell oppositely disposed along a second direction, the first structure is coupled to the first shell, the second structure is coupled to the second shell, and the first structure is disposed opposite the second structure along the second direction.

3. The battery assembly of claim 2, wherein the first structure member has a first recess at an end facing the second structure member, and the second structure member has a first protrusion at an end facing the first structure member, the first protrusion being disposed in the first recess.

4. The battery assembly of claim 3, wherein the first tab includes a first section and a second section, the first tab having a cross-sectional area that decreases in a direction of extension of the first tab.

5. The battery assembly of claim 2, wherein a plurality of the first structural members are spaced between the second portions of adjacent cells along the first direction, and a number of the second structural members corresponds to a number of the first structural members.

6. The battery assembly of claim 3, further comprising a first electrically conductive member disposed on a side of the first structural member facing away from the cells, wherein the electrode terminals of two adjacent cells are connected to the first electrically conductive member.

7. The battery pack of claim 5, further comprising a first electrically conductive member disposed between adjacent ones of the second structural members in the first direction.

8. The battery assembly of claim 6 or 7, further comprising a circuit board, wherein the first conductive member electrically connects the circuit board.

9. The battery assembly of claim 6, wherein a second recess is formed in a side of the first structural member facing away from the battery cell, and the first conductive member is disposed in the second recess.

10. The battery assembly of claim 9, wherein the first casing comprises a first sidewall, the first sidewall is provided with a plurality of first recesses, the cell is disposed in the first recesses toward a side of the first casing, a first protrusion is disposed between adjacent first recesses, and the first structural member is connected to the first protrusion.

11. The battery pack according to claim 10, wherein the first structural member includes a first section connected to one adjacent to the first recess and a second section connected to the other adjacent to the first recess, and a length of a projection of the first section on the first side wall in the first direction does not exceed a length of the first recess in the first direction and a length of a projection of the second section on the first side wall in the first direction does not exceed a length of the first recess in the first direction in a direction opposite to the second direction.

12. The battery module of claim 10, wherein the first sidewall includes a first support portion, a circuit board is disposed on the first support portion, the first structural member is coupled to the first support portion, and the circuit board and the first structural member are disposed on opposite sides of the first support portion.

13. The battery assembly of claim 2, wherein the first housing and the first structural member are an integrally formed structure and the second housing and the second structural member are an integrally formed structure.

14. The battery assembly of claim 12, wherein the first electrically conductive member includes a first section and a second section, the first section being disposed in the second recess, and the first support portion being disposed between the second section and the first recess.

15. The battery pack of claim 14, wherein the first conductive member further includes a third section connecting the first section and the second section, the third section being disposed obliquely with respect to the first section, and the first support portion includes a first inclined surface connected to the first structural member.

16. The battery pack of claim 6, wherein the electrode terminal includes a connecting portion connected to the first conductive member, and the first protrusion is at least partially disposed between the connecting portion and the first portion in a third direction perpendicular to both the first direction and the second direction.

17. The battery pack of claim 16 wherein the first tab is disposed at least partially between the connecting portion and the first portion in the second direction, and wherein the length of the portion of the first tab disposed between the connecting portion and the first portion is greater than 1/2 times the length of the connecting portion.

18. The battery assembly of claim 2, wherein the second casing comprises a second side wall, the second side wall is provided with a plurality of second recesses, one side of the battery cell facing the second casing is provided with the second recesses, a second protrusion is arranged between the adjacent second recesses, and the second structural member is connected with the second protrusion.

19. The battery pack of claim 1, wherein, along the second direction, two opposite sides of the second portion are further provided with a bending portion, respectively, and the first member abuts against the bending portion.

20. An electrical consumer, characterized in that the electrical consumer comprises a battery assembly according to any one of claims 1-19.