CN212434751U

CN212434751U - Battery pack

Info

Publication number: CN212434751U
Application number: CN202021138907.1U
Authority: CN
Inventors: 张熊; 王铁丰; 曾朝勇
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-01-29
Anticipated expiration: 2030-06-18

Abstract

The application provides a battery pack, including casing and battery module, battery module includes a plurality of electric core units, first curb plate and second curb plate, and a plurality of electric core units pile up the setting and form electric core subassembly. Along the direction that a plurality of electric core units piled up, first curb plate and second curb plate set up respectively in two sides of electric core subassembly and fixed with a plurality of electric core units. The battery pack comprises a first connecting piece and a second connecting piece, is arranged between the first side plate and the second side plate of the battery module and the shell and is used for fixing the battery module and the shell. Above-mentioned group battery is through setting up first connecting piece and second connecting piece between first curb plate and second curb plate and casing, through first connecting piece and the fixed battery module of second connecting piece and casing, replaces the mode that glue was filled between traditional electric core and the shell, effectively reduces group battery weight, practices thrift manufacturing cost.

Description

Battery pack

Technical Field

The application relates to the field of batteries, in particular to a battery pack.

Background

In batteries of electric vehicles, batteries of electric motorcycles and energy storage batteries, a battery system is roughly divided into four parts, namely a battery module, an acquisition system, a communication control system and a battery shell. Among the prior art, the fixed mode of battery module and battery case is mainly at the pouring glue between the two, and glue is filled between the electric core and the shell of battery module, leads to the weight gain of whole group battery, and manufacturing cost is higher.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present application provides a battery pack that is light in weight and low in manufacturing cost.

An embodiment of the application provides a battery pack, including casing and battery module, the battery module includes a plurality of electric core units, a plurality of electric core units pile up and set up formation electric core subassembly, the battery module is acceptd in the casing. The battery module further comprises a first side plate and a second side plate, wherein the first side plate and the second side plate are arranged in the stacking direction of the plurality of battery cell units, and the first side plate and the second side plate are respectively arranged on two sides of the battery cell assembly and fixed with the plurality of battery cell units. The battery pack comprises a first connecting piece, and the first connecting piece is arranged between the first side plate of the battery module and the shell and used for fixing the battery module and the shell. The battery pack comprises a second connecting piece, and the second connecting piece is arranged between a second side plate of the battery module and the shell and used for fixing the battery module and the shell.

Further, the first connecting piece and the second connecting piece are glue.

Optionally, the first connecting piece and the second connecting piece are made of foam rubber.

Optionally, the first side plate is provided with a first accommodating groove, the second side plate is provided with a second accommodating groove, the first connecting piece is arranged in the first accommodating groove, and the second connecting piece is arranged in the second accommodating groove.

Further, the inner surface of the housing is provided with a fixing portion, and the fixing portion is disposed in the first receiving groove and the second receiving groove.

Optionally, the first side plate is provided with a first groove for accommodating one or more battery cell units, the second side plate is provided with a second groove for accommodating one or more battery cell units, and bonding members are arranged in the first groove and the second groove and used for fixing one or more battery cell units and the first side plate and the second side plate.

Furthermore, one side of the battery cell unit is accommodated in the first groove, and the other side of the battery cell unit, which is opposite to the battery cell unit, is accommodated in the second groove.

Optionally, the battery module further includes a collection device and a battery management system, and along the stacking direction of the plurality of battery cell units, the battery management system is located on the first end surface of the battery cell assembly, and the battery management system is connected with the tabs of the plurality of battery cell units through the collection device.

Further, the battery module comprises a first fixing member, a first fixing hole is formed in the first side plate and the second side plate along the stacking direction of the plurality of battery cell units, and the battery management system is fixed to the first side plate and the second side plate through the first fixing member and the first fixing hole respectively.

Optionally, the battery module includes a conductive piece, the conductive piece is electrically connected to a tab of the battery core, and the first side plate and the second side plate are provided with accommodating grooves for accommodating the conductive piece.

Above-mentioned group battery is through setting up first connecting piece and second connecting piece between first curb plate and second curb plate and casing, through first connecting piece and the fixed battery module of second connecting piece and casing, replaces the mode that glue was filled between traditional electric core and the shell, effectively reduces group battery weight, practices thrift manufacturing cost.

Drawings

Fig. 1 is a schematic perspective view of a battery module according to an embodiment.

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

Fig. 3 is a left side view of the battery module shown in fig. 1.

Fig. 4 is a sectional view of the battery module shown in fig. 3 in the direction IV-IV.

Fig. 5 is a partially enlarged view of fig. 4.

Fig. 6 is a schematic structural view of the first side plate in an embodiment.

Fig. 7 is a sectional view of the battery module shown in fig. 3 in the VII-VII direction.

Fig. 8 is a schematic structural diagram of an insulating cover plate in an embodiment.

Fig. 9 is a bottom view of the battery module of fig. 1.

Fig. 10 is a schematic perspective view of a battery pack in an embodiment.

Fig. 11 is a cross-sectional view of the battery pack of fig. 10.

Fig. 12 is an exploded view of a battery pack in an embodiment.

Description of the main element symbols:

battery module 100

Electrical core assembly 10

First end face 101

Cell unit 11

Tab 111

The first filling member 12

Second filling member 13

Third filling member 14

Limiting groove 15

First side plate 21

First recess 211

Second side plate 22

Second groove 221

Storage tank 23

First receiving groove 241

The second receiving groove 242

Adhesive member 25

First connecting member 26

First fixing hole 27

Second fixing hole 28

Second connecting member 29

Collection device 30

Flexible circuit board 31

Acquisition member 32

Battery management system 40

First fixing member 41

Insulating cover plate 50

Second fixing member 51

Stopper 52

Housing part 53

Conductive member 60

First conductive member 61

Second electrically-conductive member 62

Third fixing member 63

Battery pack 200

Casing 201

Fixed part 202

First cover 203

Second cover 204

Conductive component 205

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," and the like as used herein are for illustrative purposes only.

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.

The embodiment of the application provides a battery pack, including casing and battery module, the battery module includes a plurality of electric core units, a plurality of electric core units pile up and set up formation electric core subassembly, the battery module is acceptd in the casing. The battery module further comprises a first side plate and a second side plate, wherein the first side plate and the second side plate are arranged in the stacking direction of the plurality of battery cell units, and the first side plate and the second side plate are respectively arranged on two sides of the battery cell assembly and fixed with the plurality of battery cell units. The battery pack comprises a first connecting piece, and the first connecting piece is arranged between the first side plate of the battery module and the shell and used for fixing the battery module and the shell. The battery pack comprises a second connecting piece, and the second connecting piece is arranged between a second side plate of the battery module and the shell and used for fixing the battery module and the shell.

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, a battery module 100 includes a battery core assembly 10, where the battery core assembly 10 includes a plurality of battery cell units 11 stacked in a stacked manner. The battery module 100 further includes a first side plate 21 and a second side plate 22, and along the stacking direction of the plurality of cell units 11, the first side plate 21 and the second side plate 22 are respectively disposed on two sides of the cell assembly 10 and fixed to the cell assembly 10. In an embodiment of the present application, the first side plate 21 and the second side plate 22 are respectively disposed at two opposite sides of the electric core assembly 10, in other embodiments, the first side plate 21 may be disposed at a side of the electric core assembly 10, and the second side plate 22 may be disposed at a bottom of the electric core assembly 10, which is not limited thereto.

Referring to fig. 3, fig. 4 and fig. 5, in an embodiment of the present disclosure, a first groove 211 for accommodating one or more battery cell units 11 is disposed on an inner side of the first side plate 21, and a second groove 221 for accommodating one or more battery cell units 11 is disposed on an inner side of the second side plate 22. In an embodiment of the present application, the plurality of cell units 11 correspond to the plurality of first grooves 211 or the plurality of second grooves 221 one-to-one, and in other embodiments, two or more cell units 11 may be disposed in one groove, which is not limited in this application. The cell unit 11 is partially accommodated in the first groove 211 and the second groove 221, which is beneficial to reducing the assembling difficulty of the first side plate 21, the second side plate 22 and the cell assembly 10, and preventing the cell assembly 10 from sliding along the stacking direction. In an embodiment of the present application, the positions of the first groove 211 and the second groove 221 of the cell unit 11 are aligned, in other embodiments, the cell unit 11 may be a special-shaped cell, the first groove 211 and the second groove 221 may be matched with the cell unit 11, and the positions of the grooves do not need to be aligned with each other. One side of the cell unit 11 is accommodated in the first groove 211, and the other side of the cell unit 11 is accommodated in the second groove 221. The shapes of the first groove 211 and the second groove 221 are matched with the shapes of the side faces of the plurality of cell units 11 to fit different types of cell units 11. The battery cell unit 11 includes a tab 111, and the tab 111 is disposed between the first side plate 21 and the second side plate 22.

Bonding pieces 25 are arranged in the first groove 211 and the second groove 221, and are used for fixing the plurality of battery cell units 11 with the first side plate 21 and the second side plate 22. In the embodiment of the present application, the first side plate 21 and the second side plate 22 are made of plastic materials, and can be manufactured in an injection molding manner, which is beneficial to reducing the weight of the battery module 100, reducing the short circuit problem, and reducing the manufacturing cost. It can be understood that, in other embodiments, the first side plate 21 and the second side plate 22 are made of a metal material with good thermal conductivity, and the bonding member 25 is a heat-conducting insulating material, such as a heat-conducting silicone grease, which is beneficial to timely conducting out heat generated by the battery pack assembly 10, and thus, the temperature of the battery module 100 is prevented from being too high. The length of first curb plate 21 and second curb plate 22 can be adjusted according to the quantity of electric core unit 11, and when the quantity of electric core unit 11 increased or reduced, can realize the increase or the reduction of the length of first curb plate 21 and second curb plate 22 through adjusting the mould or increasing raw and other material length, need not to change other spare parts of battery module 100, is favorable to battery module 100's standardized production to reduce manufacturing cost. When the thickness of the battery cell unit 11 changes, the amount of the bonding member 25 may be increased or decreased, so that the first side plate 21 and the second side plate 22 are suitable for the battery cell units 11 with different thicknesses, for example, when the thickness of the battery cell unit 11 is thinner, the amount of the bonding member 25 may be increased, and the side edge of the battery cell unit 11 is fixed to the first side plate 21 or the second side plate 22 through the bonding member 25.

Referring to fig. 7, a first receiving groove 241 is disposed on an outer side of the first side plate 21, a second receiving groove 242 is disposed on an outer side of the second side plate 22, a first connecting element 26 is disposed in the first receiving groove 241, and a second connecting element 29 is disposed in the second receiving groove 242. The first and

second connection members

26 and 29 may be a material having viscosity such as foam for fixedly mounting the battery module 100 to a designated position. The number of the first receiving grooves 241 and the second receiving grooves 242 may be multiple and distributed outside the first side plate 21 and the second side plate 22.

Referring to fig. 2 again, the battery module 100 further includes a collecting device 30 and a battery management system 40, the battery management system 40 is located at the first end surface 101 of the battery core assembly 10 along the stacking direction of the battery core units 11, and the battery management system 40 is connected to the tabs 111 of the battery core units 11 through the collecting device 30. In the embodiment of the present application, the collecting device 30 is disposed at the top end of the electric core assembly 10 to connect a plurality of tabs 111, so as to collect information such as voltage, current, temperature, etc. of the electric core assembly 10. The pick-up device 30 includes a flexible circuit board 31 and a plurality of pick-up members 32 connected to the flexible circuit board 31. Along the width direction (arrow A direction in fig. 1) of battery module 100, a plurality of collection piece 32 distribute in the both sides of flexible circuit board 31, a plurality of utmost point ear 111 are connected respectively to a plurality of collection pieces 32, battery management system 40 is connected to the one end of flexible circuit board 31 to with the information transmission who gathers extremely battery management system 40. The flexible circuit board 31 may further be provided with a temperature sensor and other components to detect various parameters of the electric core assembly 10. Referring to fig. 2 and fig. 6, in one embodiment of the present application, the battery module 100 further includes a first fixing member 41, in the stacking direction of the battery cell units 11, first fixing holes 27 are formed in the first side plate 21 and the second side plate 22, the first fixing member 41 penetrates through a circuit board of the battery management system 40 and is installed to the first fixing holes 27, and the battery management system 40 is fixedly connected with the first side plate 21 and the second side plate 22 through the first fixing member 41 and the first fixing holes 27. In other embodiments, the battery management system 40 can also be disposed at the top end of the battery pack 10, and the first fixing hole 27 is also disposed at the top ends of the first side plate 21 and the second side plate 22 to cooperate with the first fixing member 41 to fixedly mount the battery management system 40 to the top end of the battery pack 10.

Further, a first filling member 12 is arranged between the tabs of any two adjacent cell units 11, and is used for fixing the tabs 111. Specifically, along the length direction (the direction indicated by the arrow B in fig. 2) of the battery cell unit 11, the first filling member 12 is located at the top end of the battery cell assembly 10 and located between two adjacent tabs 111 to fill the gap between the tabs 111, so as to avoid the tabs 111 from being displaced, shaken, deformed, and the like.

Further, a second filling member 13 is disposed between any two adjacent cell units 11 and is used for absorbing the expansion volume of the cell units 11, and in other embodiments, the second filling member 13 may also be used for filling the assembly gap between the cell units 11, so as to prevent the cell units 11 from colliding with each other and being damaged in a vibration environment. In an alternative embodiment, a separator may be further disposed between two adjacent cell units 11 to separate the temperature between the cell units 11. In another embodiment, the second filling member 13 may also serve as a spacer, which can absorb the expansion volume of the cell unit 11 and insulate the temperature.

Referring to fig. 7 and 8, in an alternative embodiment, the battery module 100 further includes an insulating cover plate 50, and the insulating cover plate 50 is disposed at the top end of the battery cell assembly 10, covers the plurality of tabs 111 of the battery cell assembly 10, and is fixedly connected to the first side plate 21 and the second side plate 22. Referring to fig. 6 again, the top ends of the first side plate 21 and the second side plate 22 are provided with second fixing holes 28, a second fixing member 51 passes through the insulating cover plate 50 and is installed in the second fixing holes 28, and the insulating cover plate 50 is fixedly connected with the first side plate 21 and the second side plate 22 through the second fixing member 51.

Further, a limiting part 52 is disposed on the insulating cover plate 50, and the limiting part 52 protrudes from the outer surface of the insulating cover plate 50 toward the electric core assembly 10. A limiting groove 15 is formed between the second filling piece 13 and the first side plate 21 and the second side plate 22, and the limiting part 52 is arranged in the limiting groove 15. The two limiting portions 52 respectively support the two sides of the second filling member 13 not contacting the tab 111 to fix the second filling member 13, so as to prevent the second filling member 13 from shifting or falling off.

Referring to fig. 2, 3 and 7, the battery module further includes a conductive member 60, and the insulating cover plate 50 also covers the conductive member 60. The conductive member 60 electrically connects the plurality of tabs 111. The first side plate 21 and the second side plate 22 are provided with accommodating grooves 23, and the conductive pieces 60 are arranged in the accommodating grooves 23. The conductive member 60 may be a conductive wire bundle, a copper bar, an aluminum bar, or other conductive elements. In the embodiment of the present application, the conductive members 60 include a first conductive member 61 and a second conductive member 62, the first conductive member 61 connects the total positive output end of the cell assembly 10 and is fixed to the first side plate 21, the second conductive member 62 connects the total negative output end of the cell assembly 10 and is fixed to the second side plate 22, so that the positive and negative electrodes of the cell assembly 10 are led out, and the battery module 100 can be connected to an external power source or an electric device through the conductive members 60.

The battery module 100 may include a third fixing member 63 for fixing the conductive member 60 to the first side plate 21 and/or the second side plate 22. In an embodiment of the present application, the conductive pieces 60 are conductive wire bundles, the third fixing member 63 is a cable tie, and a plurality of cable ties are sleeved on the cable bundle to tie the conductive wire bundle to the first side plate 21 and/or the second side plate 22. Referring to fig. 8, a plurality of receiving portions 53 are disposed on the insulating cover 50. The accommodating parts 53 correspond to the third fixing parts 63 one by one, and the third fixing parts 63 are partially arranged in the accommodating parts 53 to prevent the insulating cover plate 50 from pressing the conductive parts 60.

Referring to fig. 9, in an alternative embodiment, a third filling member 14 is further disposed at the bottom of the electrical core assembly 10, and the third filling member 14 may be a material such as foam or epoxy resin, and is used to protect the electrical core assembly 10.

Referring to fig. 10, an embodiment of the present application further provides a battery pack 200, where the battery pack 200 includes a housing 201 and the battery module 100 in any one of the above embodiments or combinations of the above embodiments, and the battery module 100 is accommodated in the housing 201.

Referring to fig. 11, the first connecting member 26 is disposed between the outer surface of the first side plate 21 of the battery module 100 and the housing 201, and is used for fixing the battery module 100 and the housing 201. The second connection member 29 is disposed between the second side plate 22 of the battery module 100 and the case 201, and fixes the battery module 100 and the case 201. In an alternative embodiment, the inner surface of the housing 201 is provided with a plurality of fixing portions 202, and the fixing portions 202 are substantially of a clip type and can be integrally formed with the housing 201. The fixing portion 202 corresponds to the first receiving groove 241 and the second receiving groove 242, and when the battery module 100 is mounted to the housing 201, the fixing portion 202 is disposed in the first receiving groove 241 and the second receiving groove 242, and then the first connecting member 26 and the second connecting member 29 are filled in the first receiving groove 241 and the second receiving groove 242, respectively. The first connecting member 26 and the second connecting member 29 are preferably made of foam, and the fixing portion 202 is used for limiting the foaming area of the first connecting member 26 and the second connecting member 29. In other embodiments, the first connector 26 and the second connector 29 may also be glue.

Referring to fig. 12, in another embodiment, the case 201 is a hollow structure with two open ends, and the battery pack 200 further includes a first cover 203 and a second cover 204 respectively disposed at the two open ends of the case 201 for sealing the case 201. The first cover 203 is further provided with a conductive assembly 205 electrically connected to the battery module 100. An external electric device or a power source may be electrically connected to the battery module 100 through the conductive member 205.

In the battery module 100 in the above embodiment, the first side plate 21 and the second side plate 22 are provided with the grooves for accommodating the battery cell units 11, so that a plurality of stacked battery cell units 11 can be directly fixed by the first side plate 21 and the second side plate 22, a battery cell support structure in the prior art is omitted, and the assembly error and the manufacturing cost of the battery module are effectively reduced. In addition, the lengths of the first side plate 21 and the second side plate 22 can be adjusted according to the number of the battery cell units 11, which is beneficial to the standardized production of the battery module 100, and further reduces the manufacturing cost of the battery module.

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 pack, comprising:

a housing;

the battery module comprises a plurality of battery cell units, the battery cell units are stacked to form a battery core assembly, and the battery module is accommodated in the shell;

the battery module is characterized by comprising a first side plate and a second side plate, wherein the first side plate and the second side plate are respectively arranged at two side edges of the battery core assembly and fixed with the battery core units along the stacking direction of the battery core units;

the battery pack comprises a first connecting piece, and the first connecting piece is arranged between the first side plate of the battery module and the shell and used for fixing the battery module and the shell;

the battery pack comprises a second connecting piece, and the second connecting piece is arranged between a second side plate of the battery module and the shell and used for fixing the battery module and the shell.

2. The battery of claim 1, wherein said first connector and said second connector are glue.

3. The battery pack of claim 1, wherein said first connector and said second connector are foam.

4. The battery pack according to any one of claims 1 to 3, wherein the first side plate is provided with a first receiving groove, the second side plate is provided with a second receiving groove, the first connecting member is provided in the first receiving groove, and the second connecting member is provided in the second receiving groove.

5. The battery pack according to claim 4, wherein a fixing portion is provided on an inner surface of the case, the fixing portion being provided in the first receiving groove and the second receiving groove.

6. The battery pack of claim 1, wherein the first side plate is provided with a first groove for receiving one or more cell units, the second side plate is provided with a second groove for receiving one or more cell units, and bonding members are provided in the first groove and the second groove for fixing one or more cell units with the first side plate and the second side plate.

7. The battery pack of claim 6, wherein one side of the cell unit is received in the first recess and an opposite side of the cell unit is received in the second recess.

8. The battery pack of claim 1, wherein the battery module further comprises a collecting device and a battery management system, the battery management system is located at the first end face of the battery pack along the stacking direction of the plurality of battery cell units, and the battery management system is connected with the tabs of the plurality of battery cell units through the collecting device.

9. The battery pack according to claim 8, wherein the battery module includes a first fixing member, and first fixing holes are formed in the first side plate and the second side plate along a stacking direction of the plurality of battery cell units, and the battery management system is fixed to the first side plate and the second side plate through the first fixing member and the first fixing holes, respectively.

10. The battery pack according to claim 1, wherein the battery module comprises a conductive member, the conductive member is electrically connected to the tabs of the battery cells, and the first side plate and the second side plate are provided with accommodating grooves for accommodating the conductive member.