CN215342849U - Battery pack and electric device using same - Google Patents

Abstract

The present application provides a battery pack, comprising: a first cell assembly comprising a plurality of first cells, the first cells comprising a first package casing and a first metal portion, the first metal portion extending out of the first package casing along a first direction; a second cell assembly comprising a plurality of second cells, the second cells comprising a second package casing and a second metal portion, the second metal portion extending out of the second package casing along a first direction; at least part of orthographic projections of the first electric core component and the second electric core component along the first direction are overlapped; the electric connector is superposed with the orthographic projection of the first core component along the stacking direction; a first unit fixed with at least one of the first electric core assembly and the second electric core assembly. The application also provides a power utilization device using the battery pack.

Description

Battery pack and electric device using same

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack and an electric device using the battery pack.

Background

Among the current group battery, generally contain a plurality of battery modules, conventional battery module includes a plurality of electric cores, and a plurality of electric cores are piled up along the thickness of electric core and are set up, and battery module arranges the setting along the direction that the perpendicular to piled up the direction, and the mode of the electricity connection between the battery module has the room of improving. So that there is not enough space inside the battery pack to allow the electrical connection members connecting the different battery modules to be effectively arranged. How to solve the above problems needs to be considered by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, an embodiment of the present application provides a battery pack, including: a first cell assembly comprising a plurality of first cells, the first cells comprising a first package casing and a first metal portion, the first metal portion extending out of the first package casing along a first direction; a second cell assembly comprising a plurality of second cells, the second cells comprising a second package casing and a second metal portion, the second metal portion extending out of the second package casing along a first direction; at least part of orthographic projections of the first electric core component and the second electric core component along the first direction are overlapped; the electric connectors and the first core component are overlapped along the orthographic projection of the stacking direction; a first unit fixed with at least one of the first electric core assembly and the second electric core assembly.

Through setting up first unit and making first electric core subassembly and second electric core subassembly pile up the setting along first direction, make electric connector and first electric core subassembly have the coincidence along the orthographic projection of piling up the direction simultaneously for the inside sufficient space of having of group battery makes the electric connector of connecting different battery pack effectively arrange.

In a possible embodiment, the first unit is in a second direction perpendicular to the first direction, the first unit overlapping at least part of an orthographic projection of the first electrical core assembly or the second electrical core assembly.

In a possible embodiment, the first unit comprises a first side wall comprising a first surface and a second surface, the first surface being fixed with at least one of the first electric core assembly and the second electric core assembly, the electric connector being fixed with the second surface.

Electric connector separates through first unit and first electric core subassembly and second electric core subassembly, under the circumstances that guarantees electric connector setting space, reduces the extrusion between electric connector and first electric core or the second electric core, promotes the security.

In a possible embodiment, the electrical connection is fixed to the second surface.

In a possible embodiment, the first side wall is made of a resin layer, and electrical connections are connected to the first side wall.

In a possible embodiment, the second surface is provided with a recess, and the electrical connection is provided in the recess.

In a possible embodiment, the second surface is provided with a protrusion, the electrical connector is provided with a first hole, and the protrusion is provided in the first hole.

In one possible embodiment, at least part of the electrical connector is bonded to the second surface.

In a possible embodiment, the first side wall is provided with a first opening through the first side wall, the electrical connection passing through the first opening.

In a possible embodiment, the first battery cell assembly includes a first side and a second side opposite to each other along the second direction, the first side is fixed to the first sidewall, and a plurality of the first battery cells are stacked along a third direction, and the third direction is perpendicular to both the first direction and the second direction.

In one possible embodiment, a plurality of the first cells are stacked along a third direction, and the third direction is perpendicular to both the first direction and the second direction.

In one possible embodiment, the first connection layer includes a resin layer formed by post-curing a resin provided between the first sidewall and the first electric core assembly.

In a possible embodiment, the first surface is provided with a plurality of grooves, and the side edges of the first battery cell are at least partially arranged in the grooves.

In a possible embodiment, the first unit further comprises a first plate disposed between the first cell assembly and the second cell assembly, the first plate being connected to the first sidewall and extending in a direction away from the first sidewall.

In a possible embodiment, the first plate is connected to the second electric core assembly.

In a possible embodiment, the first plate element is connected to the second package shell on the side facing away from the second metal part in the first direction.

In a possible embodiment, the first unit further comprises a second plate disposed between the first cell assembly and the second cell assembly, and the second plate is spaced apart from the first plate.

Through setting up first plate and second plate, make between first electric core subassembly and the second electric core subassembly by separating, make one of them electric core subassembly can be supported by first unit at least, and promote the isolated space between first electric core subassembly and the second electric core subassembly, promote the security.

In a possible embodiment, the first side wall is provided with a first opening penetrating through the first side wall, and the electrical connector is arranged between the first plate and the second plate after passing through the first opening.

The electric connecting piece enters between the first plate and the second plate through the first opening, so that the space utilization rate and the safety can be further improved.

In a possible embodiment, the second plate has a first recess formed therethrough, and the first metal part is at least partially disposed in the first recess when viewed in a direction opposite to the first direction.

In a possible embodiment, the first core assembly further includes a plurality of first metal portions, the first structural member is disposed between the plurality of first metal portions, the first structural member is exposed by the first recess, and a second structural member is disposed between the first package case and the second plate.

In a possible embodiment, the battery pack further includes a first electrical adapter unit disposed between the first electrical core assembly and the second electrical core assembly, the first metal part is connected to the first electrical adapter unit, the electrical connector is connected to the first electrical adapter unit, and the electrical connector is electrically connected to the first electrical adapter unit.

In a possible embodiment, the battery pack further includes a second electrical adapter unit connected to the second electrical core assembly, the second electrical adapter unit is disposed on a side of the second electrical core assembly away from the first electrical core assembly, and the electrical connector is connected to the second electrical adapter unit.

In a possible embodiment, the battery pack further includes a first electrical switching unit connected to the first electrical core assembly, and a second electrical switching unit connected to the second electrical core assembly, the first electrical switching unit is located at a side of the first electrical core assembly far away from the second electrical core assembly, the second electrical switching unit is located at a side of the second electrical core assembly far away from the first electrical core assembly, and the electrical connector is connected to the first electrical switching unit.

In one possible embodiment, the battery pack further includes a first electrical relay unit disposed between the first plate and the second plate.

The first battery cell is connected with the electric connecting piece through the first electric switching unit, and the second battery cell is connected with the electric connecting piece through the second electric switching unit, so that the flexibility of the structure can be improved.

In a possible embodiment, the electric connector further comprises a second unit, wherein the second unit is buckled with the first unit to accommodate the first electric core assembly and the second electric core assembly.

In a possible embodiment, the second unit is snap-fitted with the first unit.

In a possible implementation manner, the first unit further includes a second receiving cavity, the second receiving cavity is disposed at one end of the first unit, the battery module further includes a battery management assembly, the battery management assembly is disposed in the second receiving cavity, and the battery management assembly is electrically connected to the electrical connector.

In a possible implementation manner, the first unit further includes a third plate and a fourth plate, the third plate and the fourth plate are disposed in the second receiving cavity at an interval, and at least a portion of the battery management assembly is clamped between the third plate and the fourth plate.

In one possible embodiment, the electrical connection is a wire harness, a conductive connection pad, or a flexible circuit board.

In one possible embodiment, the first electrical relay unit is at least one of a rigid circuit board, a flexible circuit board, or an electrically conductive sheet.

The application also provides an electric device comprising the battery pack.

Drawings

Fig. 1 is a perspective view illustrating a battery pack according to an embodiment of the present application.

Fig. 2 is a perspective view illustrating an angle of a battery pack according to an embodiment of the present disclosure.

Fig. 3 is a perspective view illustrating another angle of a battery pack according to an embodiment of the present application.

Fig. 4 is a schematic sectional view along the direction IV-IV of fig. 1.

Fig. 5 is a partial perspective view of a battery pack according to an embodiment of the present application.

Fig. 6 is a partial perspective view illustrating a battery pack according to an embodiment of the present application.

Fig. 7 is a partial plan view schematically illustrating a battery pack according to an embodiment of the present application.

Fig. 8 is a partial perspective view of a battery pack according to an embodiment of the present application.

Fig. 9 is a schematic plan view of a portion of a battery pack according to an embodiment of the present application.

Fig. 10 is a schematic perspective view of a first battery cell of a battery pack according to an embodiment of the present application.

Fig. 11 is a partial perspective view illustrating a battery pack according to an embodiment of the present application.

Fig. 12 is a partial perspective view of a battery pack according to an embodiment of the present application.

Fig. 13 is a partial perspective view illustrating a battery pack according to an embodiment of the present application.

Fig. 14 is a partial perspective view illustrating a battery pack according to another embodiment of the present application.

Fig. 15 is a partially exploded perspective view illustrating a battery pack according to another embodiment of the present application.

Fig. 16 is a perspective view schematically illustrating a battery pack according to another embodiment of the present application.

Fig. 17 is a partial perspective view illustrating a battery pack according to another embodiment of the present application.

Fig. 18 is a partial perspective view illustrating a battery pack according to another embodiment of the present application.

Fig. 19 is a schematic view of the electric device of the present application.

Description of the main elements

Battery pack 10

First electric core assembly 11, 21

First battery cell 110

First packing case 111

First metal part 112

First side 113

Second side 114

First structural member 115

Second structural member 116

Second electric core assembly 12, 22

Second cell 120

Second package case 121

Second metal part 122

First unit 13, 23

First side walls 131, 231

First surfaces 1311, 2311

Second surfaces 1312, 2312

First openings 1313, 2313

Edges 131a, 131b, 131c, 131d

Mounting groove 2314

Trough 1315

Convex portion 1316

First wall 132

Second wall 133

First plate 1331

Third wall 134

Second plate 1341

Sixth plate 1342

First recess 1343

Fourth wall 135

First cavity 1351

Second chamber 1352

Second accommodating cavity 136

Third plate 137

Fourth plate 138

Seventh plate 2381

Eighth plate 2382

Groove 237

Electrical connection 14, 24

First hole 140

First electrical connectors 141, 141a1, 141a3, 141b1

Second electrical connector 142

Third electrical connections 143, 143a1, 143a3, 143b1

First electrical switching unit 15

First conductive member 151

Second conductive member 152

Second electrical transfer unit 16

Third electrical transfer unit 18

Conductive sheets 161, 162, 181, 182

Second unit 17, 27

Second side wall 172

Acquisition unit 19

Third electric core assembly 33

Buffer 30

Battery management assembly 20

Power utilization device 1

Body 101

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

Detailed Description

The following description will refer to the accompanying drawings to more fully describe the present disclosure. There is shown in the drawings exemplary embodiments of the present application. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Like reference numerals designate identical or similar components.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, as used herein, the terms "comprises," "comprising," "includes" and/or "including" or "having" and/or "having," integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof.

The following description of exemplary embodiments refers to the accompanying drawings. It should be noted that the components depicted in the referenced drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar terms.

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

First embodiment

As shown in fig. 1 to 13, an embodiment of the present application provides a battery pack 10 including a first cell assembly 11, a second cell assembly 12, a first unit 13, and an electrical connector 14. Wherein the first battery cell assembly 11 includes a plurality of first battery cells 110, each of the first battery cells 110 includes a first package casing 111 and a first metal part 112, and the first metal part 112 extends out of the first package casing 111 along the first direction X; the second cell assembly 12 includes a plurality of second cells 120, and the second cells 120 include a second package case 121 and a second metal part 122, and the second metal part 122 extends out of the second package case 121 along the first direction X. At least part of orthographic projections of the first electric core assembly 11 and the second electric core assembly 12 along the first direction X coincide. Optionally, the electrical connection 14 comprises copper.

In an embodiment, the plurality of first battery cells 110 are stacked along the third direction Z, and the plurality of second battery cells 120 are stacked along the third direction Z. In one embodiment, the first core assembly 11 and the second core assembly 12 are stacked along the first direction X. At least part of orthographic projections of the first electric core assembly 11 and the second electric core assembly 12 along the first direction X coincide, in this embodiment, the first electric core assembly 11 includes M first electric cores 110, and M is any integer. The second cell assembly 12 includes N second cells 120, where N is any integer. For example, the first core assembly 11 includes three first cells 110, and the second core assembly 12 includes three second cells 120. In other embodiments, the number of first cells 110 and the number of second cells 120 may be different.

In an embodiment, the first cell 110 may further include an electrode assembly (not shown), and the electrode assembly is disposed in the first package casing 111 and the second package casing 121. The electrode assembly may include a first electrode (anode), a second electrode (cathode), and a separator, the first electrode and the second electrode being spaced apart from each other, the separator being disposed between the first electrode and the second electrode, and the first electrode and the second electrode may be current collectors having active material layers disposed on surfaces thereof. The electrode assembly may be a general electrode assembly, and for example, may be a structure in which the first electrode, the separator, and the second electrode are sequentially stacked or wound, which may be used to realize an electrochemical cycle.

The first unit 13 includes a first sidewall 131, the first sidewall 131 includes a first surface 1311 and a second surface 1312 disposed opposite to each other, and the first surface 1311 is fixed to at least one of the first core assembly 11 and the second core assembly 12; the electrical connection member 14 is fixed to the first sidewall 131, and the electrical connection member 14 is electrically connected to the first core block 11 and the second core block 12. In the third direction Z, the electrical connector 14 and the second core assembly 12 at least partially overlap. The first electric core assembly 11 and the second electric core assembly 12 are fixed by connecting the first electric core assembly 11 and the second electric core assembly 12 with the first unit 13, and the electric connector 14 is connected with the first unit 13 to realize the wiring of the electric connector 14 and realize the connection of the first electric core assembly 11 and the second electric core assembly 12. The first core assembly 11 and the second core assembly 12 may be connected in parallel by an electrical connector 14, or the first core assembly 11 and the second core assembly 12 may be connected in series by an electrical connector 14. Optionally, electrical connection 14 is secured to second surface 1312.

In one embodiment, the first sidewall 131 is made of resin, the electrical connector 14 is connected to the first sidewall 131, the first sidewall 131 is made of plastic or fusible resin, the electrical connector 14 is embedded in the unformed first sidewall 131 during the manufacturing process, and then the first sidewall 131 is formed so that the electrical connector 14 is insert-molded and connected to the first sidewall 131. The electrical connector 14 is connected to the first sidewall 131, such as by an injection molding process.

In one embodiment, at least a portion of the electrical connection 14 is bonded to the second surface 1312. A viscous medium (not shown), such as a cushion tape or a double-sided tape, is provided between the electrical connecting member 14 and the second surface 1312, and the electrical connecting member 14 and the second surface 1312 are fixed by the viscous medium.

In one embodiment, the second surface 1312 may be provided with a recess (not shown) through which the electrical connection 14 is positioned. For example, the recess on the second surface 1312 may extend in the first direction X to restrict movement of the electrical connector 14.

As shown in fig. 2, in one embodiment, the second surface 1312 may be provided with a protrusion 1316, the electrical connector 14 is provided with a first hole 140, and the protrusion 1316 is provided in the first hole 140, the first hole 140 is for nesting fit with the protrusion 1316 to secure the electrical connector 14. Specifically, the protrusion 1316 may be formed by a protrusion of the second surface 1312, and when the electrical connector 14 is disposed on the second surface 1312, the protrusion 1316 extends into the first hole 140 so that the electrical connector 14 is fixed to the first sidewall 131. Optionally, the boss 1316 is removably disposed within the first bore 140. In this embodiment, the number of the convex portions 1316 may be at least two, two convex portions 1316 are spaced apart, the number of the first holes 140 is two, and two convex portions 1316 respectively extend into one first hole 140 to position the electrical connector 14. The protrusion 1316 and the first hole 140 are secured by an interference fit. In other embodiments, the protrusion 1316 extends into the first hole 140, and the protrusion 1316 is heat-staked to secure the protrusion 1316.

In an embodiment, the first core assembly 11 and the second core assembly 12 may be fixed to the first surface 1311 by a structural fit, such as a snap fit, a mortise and tenon joint, an interference fit, and the like. In one embodiment, in a second direction Y perpendicular to the first direction X, the first cell assembly 11 includes a first side 113 and a second side 114 opposite to each other, and the first side 113 is fixed to the first sidewall 131.

In the present embodiment, the first unit 13 includes a first wall 132 and a second wall 133 oppositely disposed in the second direction Y, and a third wall 134 and a fourth wall 135 oppositely disposed in the first direction X. The third direction Z is perpendicular to both the first direction X and the second direction Y, and the first wall 132 and the second wall 133 are connected to the first sidewall 131, and the third wall 134 and the fourth wall 135 are connected to the first sidewall 131. The material of the first unit 13 includes resin, and the first unit 13 may be integrally formed through an injection molding process. In other embodiments, the third wall 134 and the fourth wall 135 are detachably connected to the first sidewall 131 and fixed. In other embodiments, the first wall 132 and the second wall 133 are removably coupled to the first sidewall 131 and secured thereto. The second wall 133 is connected to the side 131a of one end of the first wall 132 in the third direction Y, and the third wall 134 is connected to the side 131b of one end of the first wall 132 in the third direction Y, as viewed in the second direction Z. The first wall 132 and the second wall 133 extend in the second direction Z. The fourth wall 135 is connected to the side 131c of the first wall 132 at one end in the first direction X, and the fourth wall 135 is connected to the side 131d of the first wall 132 at one end in the first direction X, as viewed in the second direction Z. The fourth wall 135 and the first wall 132 extend in the second direction Z direction.

In one embodiment, the first core assembly 11 and the first sidewall 131 may be fixed by a combination of materials. In the present embodiment, a resin layer (not shown) is disposed between the first sidewall 131 and the first cell assembly 11. The resin layer may include glues such as double-sided tape; the resin layer may also be a cured adhesive, which is formed by disposing a resin between the first sidewall 131 and the first die assembly 11 and then curing, such as a cushion adhesive, a potting adhesive, etc.; the first sidewall 131 is fixed to the first core module 11 by a resin layer.

In an embodiment, the first surface 1311 is provided with a plurality of grooves 1315, the side edges of the first battery cell 110 are at least partially disposed in the grooves 1315, and the grooves 1315 are matched with the side edges of the first battery cell 110.

In an embodiment, the first unit 13 further includes a first plate 1331, the first plate 1331 is disposed between the first core assembly 11 and the second core assembly 12, and the first plate 1331 is connected to the first sidewall 131. Alternatively, the first plate member 1331 may have a plate-shaped structure.

In one embodiment, the first plate 1331 is connected to the second core assembly 12. The first plate 1331 may be connected to the second core assembly 12 by an adhesive, such as an adhesive buffer adhesive. The first plate 1331 and the second core assembly 12 may be connected by other structural members, such as a compressible buffer 30, and the buffer 30 may buffer the first core assembly 11 and the first plate 1331 when the battery pack is dropped from the outside. Optionally, the buffer 30 comprises foam. The first plate 1331 may isolate the first core assembly 11 from the second core assembly 12. The first plate 1331 is connected to the first sidewall 131, the first wall 132, and the second wall 133, respectively, and the first plate 1331 is provided with a surface extending in the Z direction.

The first unit 13 further includes a second plate 1341, and the second plate 1341 is disposed between the first core assembly 11 and the second core assembly 12 along the first direction X, the second plate 1341 is spaced from the first plate 1331, and the second plate 1341 is disposed between the first plate 1331 and the first core assembly 11. The first plate 1331 may be disposed substantially parallel to the second plate 1341. In one embodiment, the space between the first plate 1331 and the second plate 1341 is a first cavity 1351, the first sidewall 131 has a first opening 1313 penetrating the first sidewall 131, the first opening 1313 is in communication with the first cavity 1351, and the electrical connector 14 is at least partially disposed in the first cavity 1351. The first opening 1313 is located within the first cavity, viewed in a direction opposite to the third direction Z. The first opening 1313 is provided at the first section 1310 of the first sidewall 131 viewed in a direction opposite to the third direction Z, wherein the first section 1310 is provided between the first plate 1331 and the second plate 1341. First opening 1313 is in direct communication with first cavity 1351 to facilitate mounting electrical connector 14.

In an embodiment, the second plate 1341 has a first recess 1343 penetrating through the second plate 1341, and at least a portion of the first metal portion 112 is disposed in the first recess 1343 when viewed along a direction X ″ opposite to the first direction X. Electrical connector 14 is soldered to first metal portion 112 and first recess 1343 is substantially U-shaped. In an embodiment, the first electric core assembly 11 and the second electric core assembly 12 have substantially the same structure, please refer to fig. 8, and the description will take the first electric core assembly 11 as an example.

The first metal part 112 includes a first extending portion 1121 and a first connecting portion 1122, the first extending portion 1121 extends out of the first package shell 111, the first connecting portion 1122 is connected to the first extending portion 1121, and the first connecting portion 1122 is used for electrically connecting to the electrical connector 14. Optionally, the first metal portion 112 comprises copper. Optionally, the first metal part 112 comprises aluminum. The first connection portion 1122 is formed by bending a portion of the first metal portion 112.

The first core assembly 11 further includes a plurality of first structural members 115 and a plurality of second structural members 116, and when viewed along the X direction, the first structural members 115 are disposed between adjacent first metal portions 112. In the Y direction, the first structural member 115 is disposed in a gap between the first extending portions 1121 of the adjacent first battery cells 110. Alternatively, the first connecting portion 1122 may be carried on a surface of the first structural member 115 away from the first cell 110. The first structure 115 may be used to support the first connection 1122. Viewed in the direction X ", at least part of the first structural member 115 is disposed within the first recess 1343. The thickness of the second structural member 116 is smaller than the thickness of the first structural member 115 in the first direction X. Further, the first structural member 115 may be disposed between the first plate 1331 and the first package case 111, and the second structural member 116 may be disposed between the second plate 1341 and the first package case 111.

In one embodiment, the first pack case 111 includes a receiving part 1111 for receiving the electrode assembly and a sealing part 1112 extending outward from a circumferential edge of the receiving part 1111.

The receptacle 1111 of the first cell 110 includes a first portion 1113 and a second portion 1114 disposed on either side of the seal 1112, wherein the first portion 1113 of the first cell 110 adjacent to the first wall 132 is adjacent to the first wall 132 and the second structure 116 is disposed between the first portion 1113 and the second plate 1341. When the battery pack receives external impact force along direction X "or direction X, the second structural member 116 may play a role in buffering, reducing the risk of damage to the first battery pack assembly 11.

In an embodiment, the second structure 116 is disposed between the first cell 110 and the second plate 1341 near the second wall 133, and specifically, the accommodating portion 1111 of the first cell 110 includes a first portion 1113 and a second portion 1114 disposed on both sides of the sealing portion 1112, wherein the second portion 1114 of the first cell 110 near the first wall 132 is near the second wall 133, and the second structure 116 is disposed between the second portion 1114 and the second plate 1341. When the battery pack receives external impact force along the direction X' or the direction X, the second structural member 116 can play a role in buffering, and the risk of damage to the second battery cell assembly is reduced.

In some embodiments, battery pack 10 further includes a first electrical relay unit 15 disposed in first unit 13, first electrical relay unit 15 being disposed at least partially between first electrical core assembly 11 and second electrical core assembly 12. The first metal part 112 is connected to the first electrical relay unit 15, the electrical connector 14 is connected to the first electrical relay unit 15, and the electrical connector 14 is electrically connected to the first electrical relay unit 15. The first electrical adaptor unit 15 is at least partially disposed in the first cavity 1351, and the first electrical adaptor unit 15 is electrically connected to the electrical connector 14 and the first metal part 112, so as to electrically connect the second electrical core assembly 12 and the electrical connector 14. In one embodiment, the first electrical switching unit 15 includes a circuit board. In one embodiment, the first electrical relay unit 15 includes a wire harness.

In some embodiments, the first electrical adaptor unit 15 includes a conductive sheet, one end of the first electrical adaptor unit 15 is connected to the first metal part 112, the other end of the first electrical adaptor unit 15 passes through the first opening 1313 and then is disposed on the second surface 1312, and the other end of the first electrical adaptor unit 15 is connected to the electrical connector 14. The first electrical switching unit 15 includes a first conductive member 151 and a second conductive member 152, and the first conductive member 151 is connected to a positive electrode or a negative electrode of the first cell assembly 11. The first metal parts 112 of the adjacent first battery cells 110 are connected, so that the plurality of first battery cells 110 are connected in series or in parallel, and the second conductive member 152 is connected to the first metal parts 112 connected to each other, and is configured to collect current, temperature, and the like of the first metal parts 112. The battery pack further comprises an acquisition unit 19 arranged on the second surface 1312, and the electric connector 14 is electrically connected to the acquisition unit 19. Optionally, the acquisition unit 19 comprises a circuit board. The electrical connections 14 comprise a first electrical connection 141 and a second electrical connection 142. The orthographic projection of the first electrical connector 141 and the first core assembly 11 along the stacking direction has coincidence. The first electric connector 141 is connected at one end to the first conductive member 151 and at the other end to the second electric core assembly 12, and the first electric core assembly 11 and the second electric core assembly 12 are connected in series or in parallel by the connection of the first conductive member 151 and the first electric connector 141. The joint of the first electrical connector 141 and the first conductive member 151 is disposed on the second surface 1312, which is favorable for fixedly connecting, such as welding, the first electrical connector 141 and the first conductive member 151. One end of the second electrical connector 142 is connected to the second conductive member 152, and the other end of the second electrical connector 142 is connected to the collecting unit 19. One end of the second electrical connector 142 is soldered to the second conductive member 152. The other end of the second electrical connector 142 is soldered to the pickup unit 19. The electrical connector 14 and the first electrical interface unit 15 are substantially flat plate-like structures, facilitating assembly and soldering.

The electric connector 14 further comprises a third electric connector 143, one end of the third electric connector 143 is connected to the first electric connector 141, and the other end of the third electric connector 143 is connected to the collecting unit 19. One end of the third electrical connector 143 is soldered to the first electrical connector 141. The other end of the third electrical connector 143 is soldered to the pickup unit 19. The voltage or current collected by the battery pack through the third electric connector 143 and transmitted from the first battery pack 11 to the second battery pack 12 is beneficial to further control the charging and discharging of the first battery pack 11 and the second battery pack 12. The third electrical connection 143 comprises a third electrical connection 143a1 connecting the first electrical connection 141a1 and the acquisition unit 19. The third electrical connection 143 comprises a third electrical connection 143a3 connecting the first electrical connection 141a3 and the acquisition unit 19.

In one embodiment, the positive electrode of the first battery assembly 11 is connected to the negative electrode of the second battery assembly 12, and the negative electrode of the first battery assembly 11 and the positive electrode of the second battery assembly 12 are connected to an external electric device, so that the first battery assembly 11 and the second battery assembly 12 are connected in series.

In one embodiment, the battery pack 10 includes a second electrical relay unit 16, and the second electrical relay unit 16 is disposed at one end of the second cell assembly 12. The second electrical relay unit 16 has substantially the same structure as the first electrical relay unit 15, and the second electrical relay unit 16 includes two conductive sheets, one conductive sheet 161 for electrically connecting the first electrical core assembly 11 and the second electrical core assembly 12, and the other conductive sheet 162 for connecting the second electrical core assembly 12 and the collecting unit 19. Optionally, the electrical connector 14 further includes a second electrical connector 142, and the other end of the third electrical connector 143 is connected to the collecting unit 19. The third electrical connection 143 is connected at one end to another conductive plate 162. In one embodiment, the battery pack 10 further includes a third cell assembly 33, and the third cell assembly 33 has substantially the same structure as the first cell assembly 11. The third electric core assembly 33 and the second electric core assembly 12 are respectively arranged at two ends of the first electric core assembly 11, and the connection mode between the third electric core assembly 33 and the second electric core assembly 12 is basically the same as that between the first electric core assembly 11 and the second electric core assembly 12. The battery pack 10 includes a plurality of first electrical connectors 141, and the plurality of first electrical connectors 141 are sequentially arranged in the second direction Y. The plurality of first electric connectors 141 include a third electric connector 143a1 connecting the first electric core assembly 11 and the second electric core assembly 12 and a third electric connector 143a3 connecting the first electric core assembly 11 and the third electric core assembly 33. Optionally, in the second direction Y, the vertical portion of the first electrical connector 141a3 in the first direction X is closer to the first wall 132 than the vertical portion of the first electrical connector 141a1 in the first direction X. Optionally, the first electrical connector 141a3 has a bending portion, and the bent first electrical connector 141a3 overlaps the first electrical connector 141a1 in the X direction.

The battery pack includes a third electrical relay unit 18, and the third electrical relay unit 18 is provided at one end of the third electric core assembly 33. The third electrical transit unit 18 has substantially the same structure as the first electrical transit unit 15, and the third electrical transit unit 18 includes two conductive sheets, one conductive sheet 181 for electrically connecting the first electrical core assembly 11 and the third electrical core assembly 33, and the other conductive sheet 182 for connecting the third electrical core assembly 33 and the pickup unit 19. The battery pack 10 further includes a first electric connector 141 and a second electric connector 142, one end of the first electric connector 141 is connected to the conductive sheet 181, the other end of the first electric connector 141 is connected to the first electric core assembly 11, and the first electric core assembly 11 and the third electric core assembly 33 are connected in series or in parallel by the connection of the conductive sheet 181 and the first electric connector 141. The connection point of the first electrical connector 141 and the conductive sheet 181 is disposed on the second surface 1312, which is favorable for fixedly connecting, such as welding, the first electrical connector 141 and the conductive sheet 181. One end of the second electrical connector 142 is connected to the conductive sheet 182, and the other end of the second electrical connector 142 is connected to the collecting unit 19. Optionally, one end of the second electrical connector 142 is soldered to the conductive sheet 182. The other end of the second electrical connector 142 is soldered to the pickup unit 19. The electrical connector 14 and the first electrical interface unit 15 are substantially flat plate-like structures, facilitating assembly and soldering.

In one embodiment, the first unit 13 further includes a fifth plate 1332 and a sixth plate 1342, the fifth plate 1332 has substantially the same structure as the first plate 1331, the sixth plate 1342 has substantially the same structure as the second plate 1341, and the relative relationship between the fifth plate 1332 and the sixth plate 1342 is substantially the same as the first plate 1331 and the sixth plate 1342.

In one embodiment, the battery pack 10 further includes a second electrical adapter unit 16 connected to the second electrical core assembly 12, the second electrical adapter unit 16 is disposed on a side of the second electrical core assembly 12 away from the first electrical core assembly 11, and the electrical connector 14 is connected to the second electrical adapter unit 16. The second electrical adapting unit 16 can be disposed in the second cavity 1352, and the second electrical adapting unit 16 is electrically connected to the electrical connecting member 14 and the second metal portion 122, so as to achieve electrical conduction between the second electrical core assembly 12 and the electrical connecting member 14.

In other embodiments, the first electrical adapter unit 15 is disposed on a side of the first electrical core assembly 11 away from the second electrical core assembly 12, the second electrical adapter unit 16 is disposed on a side of the second electrical core assembly 12 away from the first electrical core assembly 11, and the electrical connector 14 is connected to the first electrical adapter unit 15.

In some embodiments, the battery pack 10 may further include a second unit 17, the second unit 17 being snap-fitted with the first unit 13 to receive the first, second, and third cell assemblies 11, 12, and 33. The second unit 17 has substantially the same structure as the first unit 13, and the second unit 17 is fixedly connected to the first unit 13 to receive the first electric core assembly 11 and the second electric core assembly. The second unit 17 is substantially symmetrical to the first unit 13, and the differences include, but are not limited to, the first unit 13 being provided with a snap, and the second unit 17 being provided with a matching snap hole. The first plate 1331 of the second unit 17 separates the first cell assembly 11 from the second cell assembly 12 along the first direction X, and the first plate 1331 can reduce the influence between the first cell assembly 11 and the second cell assembly 12 when any one of the cell assemblies is abnormal. Along first direction X, first battery module 11 and second battery module 12 are kept apart to fifth plate 1332 and sixth plate 1342 of second unit 17, and when any battery module in the group of cells is unusual, fifth plate 1332 and sixth plate 1342 can reduce the influence between first battery module 11 and third battery module 33.

In one embodiment, the battery pack further includes an electrical connector 14, a first electrical adaptor unit 15, a second electrical adaptor unit 16, a third electrical adaptor unit 18, and a collection unit 19, which are disposed on the outer surface of the sidewall of the second unit 17. The electrical connector 14 includes a first electrical connector 141b1 connecting the first core assembly 11 and the third core assembly 33. The third electrical connection 143 comprises a third electrical connection 143b1 connecting the first electrical connection 141b1 and the acquisition unit 19.

In other embodiments, the second unit 17 may also be in a cover plate shape, and the second unit 17 covers the open side of the first unit 13 to cooperate with the first unit 13 to wrap the first electric core assembly 11 and the second electric core assembly 12. For example, the second unit 17 may be shaped like a cover plate of the second sidewall 172 as shown in fig. 3.

In an embodiment, the first unit 13 further includes a second receiving cavity 136 disposed on a side of the second cavity 1352 away from the first cavity 1351, and the second receiving cavity 136 is spaced apart from the second cavity 1352 by a fifth plate 1332.

The battery pack 10 further includes a battery management assembly 20, the battery management assembly 20 is disposed in the second receiving cavity 136, and the battery management assembly 20 is electrically connected to the electrical connector 14. In one embodiment, the battery management assembly 20 may include a circuit board, such as a BMS board. The acquisition unit is electrically connected to the battery management assembly 20. The fifth plate 1332, the third wall 134, a portion of the first wall 132, and a portion of the second wall 133 form a second receiving cavity 136.

The first unit 13 further includes a third plate 137 and a fourth plate 138, the third plate 137 and the fourth plate 138 are disposed in the second accommodating cavity 136 at an interval, and at least a portion of the battery management assembly 20 is disposed between the third plate 137 and the fourth plate 138. In one embodiment, the third plate 137 and the fourth plate 138 may be disposed around the inner wall of the second receiving cavity 136, such that at least a portion of the edge of the battery management assembly 20 may be disposed between the third plate 137 and the fourth plate 138 to limit the movement of the battery management assembly 20.

In one embodiment, the electrical connector 14 is a wire harness, a conductive connecting piece, a flexible circuit board, or a collection of the above conductive units.

In one embodiment, the first electrical switching unit 15 and the second electrical switching unit 16 are at least one of a rigid circuit board, a flexible circuit board, or a conductive sheet.

Second embodiment

The second embodiment is substantially the same as the first embodiment, except that the structures of the first unit 23 and the second unit 27 in the second embodiment are different from the structures of the first unit 13 and the second unit 17 in the first embodiment, which are as follows:

as shown in fig. 14 to 18, the first unit 23 and the second unit 27 are fixedly connected to two sides of the first electric core assembly 21 and the second electric core assembly 22, respectively, and the first unit 23 and the second unit 27 clamp the first electric core assembly 21 and the second electric core assembly 22.

The first sidewall 231 may be provided with a plurality of grooves 237, and the first sidewall 231, the first die assembly 21 and the second die assembly 22 are fixedly connected by adhesives, at least a portion of which may be disposed in the grooves 237. In an embodiment, the groove 237 penetrates the first sidewall 231, the adhesive fixes the first unit 23, the first electrical core assembly 21 or the second electrical core assembly 22 through the groove 237, and the adhesive may be adhesive such as foam adhesive, water adhesive, and the like. In other embodiments, the groove 237 may be recessed from the second surface 2312 of the first sidewall 231 toward the first surface 2311 but does not penetrate through the first sidewall 231, and an adhesive may be disposed in the groove 237.

The first sidewall 231 has a first opening 2313, in an embodiment, the first opening 2313 penetrates through the first surface 2311 and the second surface 2312, and the first opening 2313 is disposed corresponding to a gap between the first plug assembly 21 and the second plug assembly 22.

The surface of the first sidewall 231 remote from the first core assembly 11 is provided with a mounting groove 2314, and the electrical connector 24 is disposed in the mounting groove 2314.

The first unit 23 further includes a seventh plate 2381 and an eighth plate 2382, and the seventh plate 2381 and the eighth plate 2382 are disposed between the adjacent first electric core assembly 21 and the second electric core assembly 22. At least one seventh plate 2381 of the first electric core assembly 21 and the second electric core assembly 22 is fixedly connected. The electrical connector 24 is connected to the first core assembly 21 through the first opening 2313. The electrical connection 24 comprises a wire harness.

As shown in fig. 19, the present application also provides an electric device 1 including a body 101 and a battery pack 10 disposed in the body 101. The electric device 1 can be a two-wheel electric vehicle, an electric automobile, an oil-electric hybrid vehicle and the like.

Hereinbefore, specific embodiments of the present application are described with reference to the drawings. However, those skilled in the art will appreciate that various modifications and substitutions can be made to the specific embodiments of the present application without departing from the spirit and scope of the application. Such modifications and substitutions are intended to be within the scope of the present application.

Claims (20)

1. A battery pack, comprising:

a first cell assembly comprising a plurality of first cells, the first cells comprising a first package casing and a first metal portion, the first metal portion extending out of the first package casing along a first direction;

a second cell assembly comprising a plurality of second cells, the second cells comprising a second package casing and a second metal portion, the second metal portion extending out of the second package casing along a first direction;

at least part of orthographic projections of the first electric core component and the second electric core component along the first direction are overlapped;

the electric connector is superposed with the orthographic projection of the first core component along the stacking direction; and

a first unit fixed with at least one of the first electric core assembly and the second electric core assembly.

2. The battery pack of claim 1, wherein the first unit overlaps at least a portion of an orthographic projection of the first electrical core assembly or the second electrical core assembly in a second direction perpendicular to the first direction.

3. The battery of claim 2, wherein the first cell comprises a first sidewall comprising a first surface and a second surface, the first surface secured to at least one of the first die assembly and the second die assembly, the electrical connector secured to the second surface.

4. The battery of claim 3, wherein said first sidewall is provided with a first opening therethrough, said electrical connector passing through said first opening.

5. The battery pack of claim 3, wherein the first cell assembly comprises a first side and a second side opposite to each other in the second direction, the first side is fixed to the first side, and a plurality of the first cells are stacked in a third direction, the third direction is perpendicular to both the first direction and the second direction.

6. The battery of claim 3, wherein the first unit further comprises a first plate disposed between the first cell assembly and the second cell assembly, the first plate being connected to the first sidewall and extending away from the first sidewall.

7. The battery of claim 6, wherein said first plate member is connected to said second cell assembly.

8. The battery pack according to claim 7, wherein the first plate member is connected to a side of the second package case, which is away from the second metal part, in the first direction.

9. The battery of claim 6, wherein said first unit further comprises a second plate disposed between said first cell assembly and said second cell assembly, said second plate being spaced from said first plate.

10. The battery of claim 9, wherein the first sidewall has a first opening therethrough, and wherein the electrical connector is disposed between the first plate and the second plate after passing through the first opening.

11. The battery pack according to claim 9, wherein the second plate member is provided with a first recess penetrating the second plate member, and the first metal part is at least partially provided in the first recess when viewed in a direction opposite to the first direction.

12. The battery pack according to claim 11, wherein the first core assembly further includes a plurality of first metal parts, the first structural member is disposed between the plurality of first metal parts, the first structural member is exposed by the first recess, and a second structural member is disposed between the first package case and the second plate member.

13. The battery pack of claim 3, further comprising a first electrical transfer unit disposed between the first cell assembly and the second cell assembly, the first metal part being connected to the first electrical transfer unit, the electrical connector being electrically connected to the first electrical transfer unit.

14. The battery pack of claim 3, further comprising a second electrical adapter unit connected to the second electrical core assembly, wherein the second electrical adapter unit is disposed on a side of the second electrical core assembly away from the first electrical core assembly, and the electrical connector is connected to the second electrical adapter unit.

15. The battery pack of claim 3, further comprising a first electrical switching unit connected to the first electrical core assembly, and a second electrical switching unit connected to the second electrical core assembly, wherein the first electrical switching unit is disposed on a side of the first electrical core assembly away from the second electrical core assembly, the second electrical switching unit is disposed on a side of the second electrical core assembly away from the first electrical core assembly, and the electrical connector is connected to the first electrical switching unit.

16. The battery pack of claim 10, further comprising a first electrical relay unit disposed between the first plate and the second plate.

17. The battery pack of claim 3, further comprising a second unit that is snap-fitted with the first unit to receive the first and second cell assemblies.

18. The battery pack of claim 3, wherein the first unit further comprises a second receiving cavity disposed at one end of the first unit, the battery pack further comprising a battery management assembly disposed in the second receiving cavity, the battery management assembly being electrically connected to the electrical connector.

19. The battery pack of claim 18, wherein the first unit further comprises a third plate and a fourth plate, the third plate and the fourth plate are spaced apart from each other and disposed in the second cavity, and at least a portion of the battery management assembly is clamped between the third plate and the fourth plate.

20. An electric device comprising the battery pack according to any one of claims 1 to 19.

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