CN114388969B

CN114388969B - Battery pack and electricity utilization device

Info

Publication number: CN114388969B
Application number: CN202210178901.4A
Authority: CN
Inventors: 郑万新; 吴明杰; 农文彬
Original assignee: Dongguan Poweramp Technology Ltd
Current assignee: Dongguan Poweramp Technology Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2024-05-31
Anticipated expiration: 2042-02-25
Also published as: CN114388969A

Abstract

The application discloses a battery pack and an electric device. The first shell is provided with a first concave part, the first concave part is provided with a first hole, the first shell is further provided with a second hole, the first shell comprises a first wall, and the first hole and the second hole penetrate through the first wall. The battery cell group comprises a plurality of battery cells, each battery cell comprises a battery cell shell and an electrode terminal, and the battery cell shell is at least partially arranged in the first concave part. The first connecting piece is arranged outside the first shell and is electrically connected with the electrode terminals of at least two electric cores through the first hole. The circuit board is arranged in the first shell and is provided with a first connecting part, and the first connecting part penetrates through the second hole to be electrically connected with the first connecting piece. According to the application, the first shell can limit the movement of a plurality of battery cells, so that the battery cells are grouped, the grouping structure is simplified, and the size of the battery pack is reduced, thereby reducing the installation cost and the material cost.

Description

Battery pack and electricity utilization device

Technical Field

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

Background

The battery module structure of the existing battery pack comprises a plurality of battery cell groups, wherein each battery cell group consists of a plurality of battery cells. The multiple cells are fixed between the cell groups in a mode of matching the screw and the nut, so that the multiple cells are grouped, or the multiple cells are fixed into groups through a single bracket. The grouped battery cells are fixed through the shell, and the shell fixes a plurality of battery cell groups into an overall battery pack. Such a battery pack has a complicated structure and is inconvenient to assemble.

Disclosure of Invention

In view of the foregoing, there is a need for a battery pack and an electrical device that simplify the cell grouping structure.

Some embodiments of the present application provide a battery pack including a first housing, a battery cell stack, a first connector, and a circuit board. The first shell is provided with a first concave part, the first concave part is provided with a first hole, the first shell is further provided with a second hole, the first shell comprises a first wall, and the first hole and the second hole penetrate through the first wall. The battery cell group comprises a plurality of battery cells, each battery cell comprises a battery cell shell and an electrode terminal, and the battery cell shell is at least partially arranged in the first concave part. The first connecting piece is arranged outside the first shell and is electrically connected with the electrode terminals of at least two electric cores through the first hole. The circuit board is arranged in the first shell and is provided with a first connecting part, and the first connecting part penetrates through the second hole to be electrically connected with the first connecting piece. The first shell can limit the movement of a plurality of battery cells, so that the battery cells are grouped, the grouping structure is simplified, the size of the battery pack is reduced, the battery pack is light, and the installation cost and the material cost of the battery pack are reduced.

In at least one embodiment, the electrode terminal is at least partially positioned within the first aperture, and the electrode terminal positioned within the first aperture is configured to facilitate welding or the like.

In at least one embodiment, each cell includes a cell housing and electrode terminals, the electrode terminals of the cells being divided into a first terminal and a second terminal, the first terminal and the second terminal being of opposite polarity.

In at least one embodiment, a portion of the first terminal is positioned in the first hole, the remaining portion of the first terminal is positioned in the first recess, and the first terminal positioned in the first hole is connected with the first connecting member, which may facilitate operations such as welding.

In at least one embodiment, the first terminal is entirely located within the first aperture.

In at least one embodiment, a portion of the first terminal is located in the first aperture, a portion is located in the first recess, and a portion is located in the second recess.

In at least one embodiment, a partition is provided between the first and second holes, the first and second holes being separated. The partition portion may function to support the first connection portion.

In at least one embodiment, the first housing includes a second wall and a third wall disposed opposite to each other, a fourth wall is disposed between the second wall and the third wall, the second wall, the third wall and the fourth wall are all connected to one side of the first wall, and the circuit board is at least partially disposed between the second wall and the fourth wall. The second wall and the fourth wall can play a limiting role on the circuit board, so that the circuit board is limited in a gap between the second wall and the fourth wall.

In at least one embodiment, the second wall is provided with a stop, and the circuit board is at least partially located between the stop and the fourth wall. The distance between the limiting piece and the fourth wall is smaller than the distance between the second wall and the fourth wall, so that the risk of scratch or extrusion between the circuit board and the second wall can be reduced.

In at least one embodiment, the side of the limiting member facing the fourth wall is provided with an inclined portion. The inclined part makes the gap between the limiting part and the fourth wall smaller, and the gap between the limiting part and the fourth wall is larger, so that the circuit board is convenient to install due to the fact that the gap between the limiting part and the fourth wall is larger. When the circuit board contacts the inclined part, the circuit board can enter the bottom of the gap along the inclined part, and the inclined part plays a role in guiding.

In at least one embodiment, the first concave portion and the second hole are arranged on two opposite sides of the fourth wall, so that the position where the battery core is placed and the position where the circuit board is placed are isolated through the fourth wall, the risk that the electronic device on the circuit board directly contacts the battery core to cause faults is reduced, and the first connecting portion can directly extend out of the first shell through the second hole conveniently.

In at least one embodiment, the battery pack further includes an insulating member fixed outside the first case and covering the first hole, the second hole, and the first connection member. The insulating member encloses the battery pack such that the conductive electrode terminal, the first connecting member, and the second connecting member are enclosed within the battery pack.

In at least one embodiment, the first housing is provided with a first slot for receiving the first connector, the first slot being in communication with at least two first apertures. The first groove can limit the first connecting piece, reduces the movement of the first connecting piece when being connected with the electrode terminal, can also play a foolproof role, and improves the installation efficiency.

In at least one embodiment, the first housing includes a second recess facing away from the first recess, and the insulator is disposed in the second recess. The second concave part can play a limiting role on the insulating part, and the risk of detachment when the insulating part is not firmly installed is reduced. The second concave part can also play a foolproof role, so that the insulating part can be quickly adhered to the corresponding part, and the installation efficiency is improved.

In at least one embodiment, the first hole extends through the first wall in a first direction in which the first connector does not extend beyond the first wall.

In at least one embodiment, the insulating member is bonded to the first housing by glue, the glue being provided in a gap between the first connecting member and the first wall. Further enhancing the water resistance.

In at least one embodiment, the first recess is provided with a plurality of second slots, the number of second slots being equal to the number of cells, at least part of each cell being disposed in one of the second slots. Each cell can be limited by the second slot, thereby inhibiting movement of the cell.

In at least one embodiment, the battery pack further comprises a second shell, the second shell is connected with the first shell, and the second shell and the first shell are used for accommodating the battery cell group and the circuit board together, so that a plurality of battery cells can be better combined, and the circuit board can be fixed more firmly.

In at least one embodiment, the second casing is provided with a third concave part, the battery cell casing comprises a first end and a second end which are oppositely arranged, the first end is connected with the electrode terminal, the first end is arranged in the first concave part, the second end is arranged in the third concave part, the third concave part can play a limiting role on the battery cell group, and the battery cell is convenient to install.

In at least one embodiment, the third recess is provided with a third hole, the second case is further provided with a fourth hole, and the first and second ends are connected with electrode terminals, respectively. The battery pack further comprises a second connecting piece, wherein the second connecting piece is arranged outside the second shell and is electrically connected with the electrode terminals connected with the at least two second ends through the third holes. The circuit board also comprises a second connecting part, and the second connecting part passes through the fourth hole to be electrically connected with the second connecting part, so that the electrode terminal of the positive electrode and the electrode terminal of the negative electrode of the battery cell are arranged at two opposite ends, thereby improving the applicability to the battery cell.

The embodiment of the application also provides an electric device, which comprises the battery pack according to any embodiment. The power utilization device has the beneficial effects of the battery cell in any embodiment by using the battery cell in any embodiment.

The first shell is provided with the first concave part, the battery cell group comprises a plurality of battery cells, each battery cell comprises the battery cell shell and the electrode terminal, and the battery cell shells of the battery cells are at least partially arranged in the first concave part, so that the first shell can limit the movement of the plurality of battery cells in the battery cell group, the battery cells are beneficial to being grouped, the grouping structure is simplified, the size of the battery pack is reduced, and the installation cost and the material cost of the battery pack are reduced.

Drawings

Fig. 1 is a schematic structural diagram of a battery pack according to an embodiment of the present application.

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

Fig. 3 is a schematic structural diagram of a first housing according to an embodiment of the application.

Fig. 4 is a schematic diagram of a battery cell according to an embodiment of the application.

Fig. 5 is a schematic diagram of a cell group formed by the cells in fig. 4.

Fig. 6 is a schematic structural diagram of a battery pack according to an embodiment of the present application.

FIG. 7 is a cross-sectional view taken along VII-VII in FIG. 6.

Fig. 8 is a schematic diagram of a second housing, a battery cell set, and a circuit board according to an embodiment of the application.

Fig. 9 is a schematic structural diagram of a battery pack without a first connecting member according to an embodiment of the present application.

Fig. 10 is a schematic view of a structure in which the battery pack of fig. 9 is provided with a first connection member.

Fig. 11 is a schematic structural diagram of a first housing according to an embodiment of the application.

Fig. 12 is a schematic structural diagram of a second housing according to an embodiment of the application.

Fig. 13 is a schematic structural diagram of a second housing according to an embodiment of the application.

Fig. 14 is a schematic structural diagram of an electric device according to an embodiment of the application.

Description of the main reference signs

Battery pack 100

First housing 10

First wall 11

First concave portion 12

Second groove 121

First hole 1211

Second hole 13

First space 14

Partition 15

Second wall 16

Spacing member 161

Inclined portion 1611

Third wall 17

Fourth wall 18

Annular projection 19

Sixth wall 10a

Seventh wall 10b

First groove 102

Second concave portion 103

Second housing 20

Third recess 21

Third groove 211

Third hole 2111

Fourth hole 22

Fourth groove 23

Eighth wall 24

Cell group 30

Cell 31

Cell casing 311

First end 3111

Second end 3112

Electrode terminal 312

First terminal 312a

Second terminal 312b

First connector 40

Second connector 50

Circuit board 60

First connecting portion 61

Second connecting portion 62

Wire 63

Insulation member 70

Power utilization device 1000

First direction Y

Second direction Z

Third direction X

Detailed Description

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

It is noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component or intervening components 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 "top," "bottom," "upper," "lower," "left," "right," "front," "rear," and the like are used herein for illustrative purposes only.

The term "vertical" is used to describe an ideal state between two components. In the actual production or use state, there may be an approximately vertical state between the two components. For example, in conjunction with the numerical description, perpendicular may refer to an angle between two straight lines ranging between 90±10°, perpendicular may refer to a dihedral angle between two planes ranging between 90±10°, and perpendicular may refer to an angle between a straight line and a plane ranging between 90±10°. The two components described as "perpendicular" may be considered "straight" or "planar" as they are considered "straight" or "planar" in that they are not strictly straight or planar, but may be substantially straight or planar in that they extend in a macroscopic manner.

The term "parallel" is used to describe an ideal state between two components. In an actual production or use state, there may be a state of approximately parallelism between the two components. For example, in connection with numerical descriptions, parallel may refer to an angle between two straight lines ranging between 180++10°, parallel may refer to a dihedral angle between two planes ranging between 180++10°, and parallel may refer to an angle between a straight line and a plane ranging between 180++10°. The two components described as "parallel" may be considered "straight" or "planar" as they are considered "straight" or "planar" in that they are not strictly straight or planar, but may be substantially straight or planar in that they extend in a macroscopic manner.

The term "plurality" means two or more.

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

The application discloses a battery pack which comprises a first shell, a battery cell group, a first connecting piece and a circuit board. The first shell is provided with a first concave part, the first concave part is provided with a first hole, the first shell is further provided with a second hole, the first shell comprises a first wall, and the first hole and the second hole penetrate through the first wall. The battery cell group comprises a plurality of battery cells, each battery cell comprises a battery cell shell and an electrode terminal, and the battery cell shell is at least partially arranged in the first concave part. The first connecting piece is arranged outside the first shell and is electrically connected with the electrode terminals of at least two electric cores through the first hole. The circuit board is arranged in the first shell and is provided with a first connecting part, and the first connecting part penetrates through the second hole to be electrically connected with the first connecting piece. The circuit board is electrically connected with the first connecting piece through the first connecting part, so that the circuit board can be electrically connected with the battery cell group. The first shell can limit the movement of a plurality of battery cells in the battery cell group, so that the battery cells are grouped, the grouping structure is simplified, the size of the battery pack is reduced, and the installation cost and the material cost of the battery pack are reduced.

Some embodiments of the present application will be described below with reference to the accompanying drawings. The embodiments described below and features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 to 3, a battery pack 100 is provided in an embodiment of the application, and the battery pack 100 includes a first housing 10, a battery cell assembly 30, a first connector 40 and a circuit board 60. The first housing 10 is provided with a first recess 12, a first space 14 and a second hole 13, the first housing 10 further comprising a first wall 11.

The first recess 12 is provided with a first hole 1211, and the first hole 1211 and the second hole 13 penetrate the first wall 11 in the first direction Y.

The battery cell group 30 includes a plurality of battery cells 31, each battery cell 31 includes a battery cell housing 311 and an electrode terminal 312, and the battery cell housing 311 is at least partially disposed in the first recess 12. The first wall 11 and the electrode terminal 312 are located at one side of the battery cell case 311, and the electrode terminal 312 is disposed toward the first wall 11, so that the electrode terminal 312 is exposed through the first hole 1211.

The first connection member 40 is disposed outside the first case 10, and the first connection member 40 is electrically connected to the electrode terminals 312 of at least two of the battery cells 31 through the first hole 1211. In some embodiments, the first connector 40 is configured as a conductive sheet, and a series connection or a parallel connection between at least two of the cells 31 may be achieved. In some embodiments, the first connection member 40 is connected to the electrode terminal 312 by welding. Alternatively, laser welding or ultrasonic welding can be adopted for welding, so that the cost can be reduced, and the welding spot volume can be reduced.

The circuit board 60 is at least partially disposed in the first space 14, the circuit board 60 is provided with a first connection portion 61, the first connection portion 61 passes through the second hole 13 to be electrically connected with the first connection member 40, and the circuit board 60 can collect information such as voltage and current of the battery cell 31 through the first connection portion 61. The circuit board 60 may protrude through the wire 63 out of the first space 14 for electrical connection with external devices.

In some embodiments, the first connection portion 61 may be configured as a conductive metal sheet, such as a copper sheet, an iron sheet, or the like, having a certain strength, which may be penetrated from the second hole 13, thereby improving the installation efficiency. The first connection portion 61 penetrates through the second hole 13 and is electrically connected to the first connection member 40 by welding or the like, and in other embodiments, the first connection portion 61 and the first connection member 40 are connected by conductive adhesive connection, snap connection or the like.

The first shell 10 can limit the movement of the plurality of battery cells 31, is beneficial to grouping the plurality of battery cells 31, simplifies the grouping structure, reduces the size of the battery pack 100, lightens the battery pack 100, and further reduces the installation cost and the material cost of the battery pack 100.

In some embodiments, referring to fig. 3, the first housing 10 includes a second wall 16 and a third wall 17 disposed opposite along a second direction Z, which is perpendicular to the first direction Y. The first housing 10 further comprises a fourth wall 18 arranged between the second wall 16 and the third wall 17. The second wall 16, the third wall 17 and the fourth wall 18 are all connected to one side of the first wall 11. The circuit board 60 is at least partially disposed between the second wall 16 and the fourth wall 18, and the second wall 16 and the fourth wall 18 may provide a limiting function to the circuit board 60.

In some embodiments, referring to fig. 3, the first housing 10 further includes a sixth wall 10a and a seventh wall 10b disposed opposite to each other along a third direction X, which is perpendicular to the second direction Z, and is also perpendicular to the first direction Y. The sixth wall 10a is connected to the first wall 11, the second wall 16, and the third wall 17, and the seventh wall 10b is connected to the first wall 11, the second wall 16, and the third wall 17, and a part of the first wall 11, a part of the third wall 17, a part of the fourth wall 18, a part of the sixth wall 10a, and a part of the seventh wall 10b are surrounded to form the first concave portion 12. A portion of the first wall 11, the second wall 16, and the fourth wall 18 enclose a first space 14. Along the second direction Z, the first recess 12 and the second hole 13 are disposed on opposite sides of the fourth wall 18, so that the portion where the battery core 31 is disposed and the portion where the circuit board 60 is disposed are isolated by the fourth wall 18, thereby reducing the risk of failure caused by the electronic device on the circuit board 60 contacting the battery core 31, and facilitating the first connection portion 61 on the circuit board 60 to directly extend out of the first housing 10.

In some embodiments, the thickness of the fourth wall 18 is set to be between 4mm and 6mm in the second direction Z, so that the distance between the circuit board 60 and the battery cell 31 is greater than or equal to 4mm, and the influence of the heating element on the circuit board 60 on the battery cell 31 can be reduced.

In some embodiments, referring to fig. 3 and 4, the battery cell housing 311 includes a first end 3111 and a second end 3112 opposite to each other, the first recess 12 is provided with a plurality of second grooves 121, the first end 3111 of the battery cell housing 311 is disposed in one of the second grooves 121, and the second grooves 121 are used for limiting the battery cell housing 311 and inhibiting the battery cell 31 from being displaced. The second groove 121 communicates with the first hole 1211.

In some embodiments, the number of the second slots 121 is equal to the number of the battery cells 31, and the first end 3111 of each battery cell housing 311 is disposed in one of the second slots 121, so that each battery cell 31 is limited by the corresponding second slot 121.

In some embodiments, the first ends 3111 of the plurality of cell housings 311 are disposed within one second slot 121.

In some embodiments, the shape of the second groove 121 may be adapted to the shape of the cell housing 311, and the cell housing 311 is illustratively provided in a cylindrical shape, and the groove shape of the second groove 121 is also provided in a cylindrical shape. In some embodiments, the caliber of the second groove 121 decreases gradually along the direction from the notch to the groove bottom along the first direction Y, and the groove bottom of the second groove 121 is capable of being matched with the first end 3111 of the cell housing 311. The caliber of the second groove 121 adjacent to the notch is larger, so that the battery cell 31 can be conveniently installed in the second groove 121, the caliber of the bottom of the second groove 121 is smaller, and the second groove is matched with the first end 3111 of the battery cell shell 311, so that the battery cell 31 is more firmly installed.

In some embodiments, referring to fig. 4 and 5, the electrode terminals 312 of the battery cell 31 are divided into a first terminal 312a and a second terminal 312b, and the polarities of the first terminal 312a and the second terminal 312b are opposite. The first terminal 312a and the second terminal 312b are provided at both ends of the cell case 311, the first terminal 3111 is connected to the first terminal 312a, and the second terminal 3112 is connected to the second terminal 312 b. Illustratively, the polarity of the first terminal 312a is positive and the polarity of the second terminal 312b is negative.

In other embodiments, the first end 3111 is coupled to the second terminal 312b, and the second end 3112 is coupled to the first terminal 312 a.

In other embodiments, the first terminal 312a and the second terminal 312b of the same cell 31 are disposed on the same side of the cell 31 (not shown). For example, the first terminal 312a and the second terminal 312b are simultaneously connected to the first end 3111 of the cell housing 311.

In some embodiments, the first terminal 312a may be exposed from the first aperture 1211. The first connector 40 is outside the first case 10, and the electrode terminal 312 connected to the first end 3111 may be electrically connected to the first connector 40 through the first hole 1211. The battery cell 31 is mounted in the first concave portion 12, and the first connecting piece 40 is connected with the corresponding electrode terminal 312 outside the first shell 10, so that the battery cell 31 can be limited when the first connecting piece 40 and the electrode terminal 312 are connected, and the risk of deflection caused by touching the battery cell 31 in the connecting process is reduced. When the first connector 40 is externally connected, an operation space is increased, which is advantageous in improving installation efficiency and safety.

In some embodiments, referring to fig. 6 and 7, the second wall 16 is provided with a stop 161, and the circuit board 60 is at least partially located between the stop 161 and the fourth wall 18. The limiting member 161 is disposed on a side of the second wall 16 near the fourth wall 18 and is connected to the second wall 16, so as to limit the circuit board 60.

The circuit board 60 is typically provided with electronic components, and the edge portion of the board body of the circuit board 60 may be clamped in the gap between the limiting member 161 and the fourth wall 18, and the portion of the circuit board 60 provided with the electronic components may be located between the second wall 16 and the fourth wall 18 where the limiting member 161 is not provided, and the electronic components face the second wall 16. When the battery pack 100 moves or collides, the edge plate portion of the circuit board 60 is restrained by the restraining member 161 and the fourth wall 18, thereby reducing the possibility that the portion of the circuit board 60 where the electronic device is provided collides or presses against the second wall 16.

In other embodiments, the limiting member 161 may be disposed on the fourth wall 18, so that the electronic device faces more toward the fourth wall 18 when the circuit board 60 is mounted; or the fourth wall 18 and the second wall 16 are each provided with a stopper 161, which is not particularly limited herein.

In some embodiments, referring to fig. 7, a side of the limiting member 161 facing the fourth wall 18 is provided with an inclined portion 1611, and a distance between the inclined portion 1611 and the fourth wall 18 decreases gradually along the first direction Y. The inclined portion 1611 makes the gap between the limiting member 161 and the fourth wall 18 present a smaller gap near the first wall 11, and a larger gap far from the first wall 11, so that the circuit board 60 can enter the larger gap during installation, so as to facilitate installation.

In some embodiments, the inclined portion 1611 is an inclined surface formed on the limiting member 161, and when the circuit board 60 contacts the inclined portion 1611, the inclined portion 1611 may enter the bottom of the gap along the inclined surface, and serve as a guide.

In some embodiments, referring to fig. 7, the distance between the limiting member 161 and the fourth wall 18 in the second direction Z is 0.5mm-1.5mm greater than the thickness of the board body of the circuit board 60, which is beneficial for limiting, and may reduce the risk of damaging the circuit board 60 due to inconvenience in mounting the circuit board 60.

In some embodiments, referring to fig. 7, the battery pack 100 further includes an insulator 70. An insulator 70 is fixed to the outside of the first housing 10. The insulator 70 fixed to the first case 10 covers the first hole 1211, the second hole 13, and the first connector 40, and thus insulates the electrode terminal 312, the first connection part 61, and the first connector 40 from the outside, thereby closing the battery pack 100. Among them, the insulator 70 may be provided as a polycarbonate insulating sheet, or a resin insulating sheet, or the like.

In some embodiments, referring to fig. 7, along the first direction Y, the periphery of the side of the first wall 11 facing away from the battery cell housing 311 extends to form an annular protrusion 19, such that the side of the first housing 10 facing away from the first recess 12 forms a second recess 103, and the insulating member 70 is disposed in the second recess 103. The second recess 103 serves to limit the insulator 70, reducing the risk of the insulator 70 coming off. The second recess 103 is also effective in preventing fool, so that the insulator 70 can be quickly adhered to a corresponding portion, and the mounting efficiency is improved.

In some embodiments, in the first direction Y, the annular protrusion 19 has a height greater than or equal to the thickness of the insulator 70, and the insulator 70 does not extend beyond the annular protrusion 19. When the battery pack 100 is placed on other components, the annular protrusion 19 is in contact with the other components, so that the annular protrusion 19 plays a role in supporting and protecting, and the risk of damage to the insulating member 70 caused by friction and collision between the insulating member 70 and the other components is reduced, for example, the battery pack 100 is placed on the ground.

In some embodiments, the insulator 70 is fixed to the first housing 10 by means of adhesive. The adhesive can be acid anhydride insulating adhesive or amine insulating adhesive, etc. The bonding method has the advantages of stable connection, difficult release and the like, and the insulator 70 can be replaced by heating and melting glue and the like.

In some embodiments, the gap between the first connector 40 and the first wall 11 is provided with glue, further enhancing the waterproofing.

In other embodiments, the insulator 70 may be fixed to the first housing 10 or the second housing 20 by a snap fit, a clamp, or the like.

In some embodiments, referring to fig. 8 to 10, the first housing 10 is provided with a first slot 102, the first slot 102 is disposed on a side of the first wall 11 away from the battery cell housing 311, and the first slot 102 is configured to receive the first connector 40. The first groove 102 communicates with at least two first holes 1211, so that the first connection member 40 in the first groove 102 is conveniently connected to the electrode terminal 312 through the first holes 1211. The first groove 102 may be used to limit the first connector 40, reduce displacement of the first connector 40 when connected to the electrode terminal 312, improve installation efficiency, and reduce risk of interference between the insulator 70 and the first connector 40.

In an embodiment, referring to fig. 9 and 10, the shape of the first slot 102 and the shape of the first connecting member 40 are adapted, so that the first slot 102 can better limit the first connecting member 40.

In some embodiments, referring to fig. 9 and 10, in the first direction Y, the depth of the first groove 102 is greater than the thickness of the first connector 40, and the first connector 40 does not protrude beyond the first wall 11. Illustratively, in the first direction Y, the thickness of the first connecting member 40 is set to 1mm, and the depth of the first groove is set to 1.5mm, so that the first connecting member 40 does not exceed the first groove 102 to affect the installation of the insulating member 70, and when the insulating member 70 is adhered by glue, a part of glue can flow into the gap between the first wall 11 and the first connecting member 40 conveniently, thereby further enhancing the waterproof performance.

In some embodiments, the first terminal 312a is at least partially positioned within the first bore 1211. Optionally, a portion of the first terminal 312a is located in the first hole 1211, the remaining portion of the first terminal 312a is located in the first recess 12, and the first terminal 312a located in the first hole 1211 is connected to the first connector 40, which may facilitate welding or the like. Alternatively, the first terminal 312a is entirely located within the first bore 1211. Alternatively, a portion of the first terminal 312a is located in the first hole 1211, a portion is located in the first recess 12, and a portion is located in the second recess 103.

In some embodiments, the first terminal 312a is entirely located within the second recess 103.

In some embodiments, referring to fig. 11, a partition 15 is disposed between the first hole 1211 and the second hole 13, and the first hole 1211 is separated from the second hole 13. The partition 15 may function to support and limit the first connection portion 61 below the first connection portion 61.

In some embodiments, the partition 15 may be concavely provided for limiting the first connection portion 61. In other embodiments, a protrusion (not shown) for limiting may be provided on the first housing 10, and the protrusions may be provided on both sides of the first connection portion 61, so that the first connection portion 61 may be limited, thereby improving the stability of the battery pack 100 during the installation process.

In some embodiments, referring to fig. 12 and 13, the battery pack 100 further includes a second housing 20, where the second housing 20 is connected to the first housing 10, and the second housing 20 and the first housing 10 together house the battery cell 30 and the circuit board 60, so as to enhance the fixing effect on the battery cell 30 and the circuit board 60, and further facilitate the handling and stacking of the battery pack 100.

In some embodiments, the second housing 20 and the first housing 10 are identical in structure.

Referring to fig. 12 and 13, the second housing 20 is provided with a third recess 21, and the first ends 3111 of some battery cell housings 311 are disposed in the first recess 12, and the second ends 3112 are disposed in the third recess 21, so as to limit the battery cell assembly 30, thereby facilitating the installation of the battery cells 31.

In some embodiments, referring to fig. 12 and 13, the third recess 21 is provided with a plurality of third grooves 211, the second end 3112 of the battery cell housing 311 is disposed in one third groove 211, and the first end 3111 of the battery cell housing 311 is disposed in one second groove 121, so that both ends of the battery cell housing 311 are limited, and the limiting effect on the battery cell 31 is enhanced.

In some embodiments, the shape of the third slot 211 may be adapted to the shape of the cell housing 311, so as to better limit the cell housing 311. In some embodiments, the number of third slots 211 is equal to the number of cells 31, such that the second end 3112 of each cell housing 311 is positioned within a corresponding third slot 211.

In some embodiments, the second ends 3112 of the plurality of cell housings 311 are disposed within one third slot 211.

Referring to fig. 12 and 13, the third recess 21 is provided with a third hole 2111, the third hole 2111 communicates with the third groove 211, and the electrode terminal 312 connected to the second end 3112 may be exposed from the third hole 2111.

In some embodiments, the second terminal 312b is disposed at least partially within the third aperture 2111. Optionally, a portion of the second terminal 312b is located in the third hole 2111, and the remaining portion of the second terminal 312b is located in the third recess 21. Alternatively, the second terminals 312b are all located within the third holes 2111. Optionally, a portion of the second terminal 312b is located in the third hole 2111, a portion of the second terminal 312b is located in the third recess 21, and the remaining portion of the second terminal 312b is located extending out of the third hole 2111.

The battery pack 100 further includes a second connection member 50, and the second connection member 50 is outside the second case 20, and the electrode terminal 312 connected to the second end 3112 may be electrically connected to the second connection member 50 through the third hole 2111. In one embodiment, the second connection member 50 is a conductive sheet and may be connected to the electrode terminal 312 by welding.

In some embodiments, referring to fig. 13, the second housing 20 is provided with a fourth hole 22, and the circuit board 60 further includes a second connection portion 62, where the second connection portion 62 protrudes from the fourth hole 22 and can be electrically connected to the second connection member 50 by soldering or the like.

In some embodiments, referring to fig. 13, the second housing 20 is further provided with a fourth groove 23, the fourth groove 23 communicates with at least two third holes 2111, and the second connection member 50 is disposed in the fourth groove 23.

In some embodiments, referring to fig. 13, the second housing 20 is provided with an eighth wall 24 opposite to the first wall 11, and a distance between the eighth wall 24 and the first wall 11 along the first direction Y is 0.5mm-1.5mm greater than a width of the circuit board 60, so as to be beneficial to inhibiting the shake of the circuit board 60 and playing a limiting role on the circuit board 60.

In some embodiments, an insulating member 70 is adhered to a side of the eighth wall 24 facing away from the first wall 11 for covering the second connection member 50, the third hole 2111, the fourth hole 22 and the fourth groove 23, thereby closing the battery pack 100 such that the conductive electrode terminal 312, the first connection member 40 and the second connection member 50 are all enclosed within the battery pack 100. In the first direction Y, the second connecting member 50 does not extend beyond the eighth wall 24, so that when the insulating member 70 is bonded by glue, a convenient portion of the glue can flow into the gap between the eighth wall 24 and the second connecting member 50, thereby further enhancing the waterproofing.

In some embodiments, referring to fig. 13, the second housing 20 may be provided with the same or similar structures as the second wall 16, the third wall 17, the fourth wall 18, the annular protrusion 19, the sixth wall 10a, the seventh wall 10b, and the stopper 161 of the first housing 10, and may have the same advantageous effects as the structures of the second wall 16, the third wall 17, the fourth wall 18, the annular protrusion 19, the sixth wall 10a, the seventh wall 10b, and the stopper 161. In some embodiments, the second housing 20 and the first housing 10 are symmetrically disposed.

The present application accommodates the battery cells 31 by using the first case 10 and the second case 20 so that the battery cells 31 are grouped. The grouping scheme has the advantages of less material consumption, simple installation, light weight of the battery pack 100 and reduced material cost and manufacturing cost. The first connecting piece 40 and the second connecting piece 50 are connected outside the first casing 10 and the second casing 20, which is beneficial to increasing the operation space and ensuring good safety. The first groove 102 and the fourth groove 23 limit the first connecting piece 40 and the second connecting piece 50 respectively, so that the foolproof operation can be effectively realized, the use of positioning tools is reduced, the manufacturing process is simplified, and the safety is improved.

Referring to fig. 14, an embodiment of the present application further provides an electric device 1000, where the electric device 1000 includes the battery pack 100. Because the power utilization device 1000 adopts the technical solutions of all embodiments of any one of the battery packs 100, the power utilization device at least has the beneficial effects brought by the technical solutions of any one of the battery packs 100, and will not be described in detail herein.

In addition, those skilled in the art will recognize that the foregoing embodiments are merely illustrative of the present application and are not intended to be limiting, as appropriate modifications and variations of the foregoing embodiments are within the scope of the present disclosure.

Claims

1. A battery pack, the battery pack comprising:

the first shell is provided with a first concave part, the first concave part is provided with a first hole, the first shell is also provided with a second hole, the first shell comprises a first wall, and the first hole and the second hole penetrate through the first wall;

The battery cell group comprises a plurality of battery cells, each battery cell comprises a battery cell shell and an electrode terminal, and the battery cell shell is at least partially arranged in the first concave part;

the first connecting piece is arranged outside the first shell and is electrically connected with the electrode terminals of at least two electric cores through the first holes;

the circuit board is arranged in the first shell and is provided with a first connecting part, and the first connecting part penetrates through the second hole to be electrically connected with the first connecting piece.

2. The battery pack of claim 1, wherein the electrode terminal is at least partially located within the first aperture.

3. The battery pack of claim 1, wherein a partition is provided between the first hole and the second hole, the first hole and the second hole being separated.

4. The battery pack of claim 1, wherein the first housing includes oppositely disposed second and third walls, a fourth wall is disposed between the second and third walls, and the circuit board is at least partially disposed between the second and fourth walls.

5. The battery pack of claim 4, wherein the first recess and the second aperture are provided on opposite sides of the fourth wall.

6. The battery pack of any one of claims 1 to 5, further comprising an insulator secured to the first housing and covering the first aperture, the second aperture, and the first connector.

7. The battery pack of claim 6, wherein the first housing is provided with a first slot for receiving the first connector, the first slot being in communication with at least two of the first apertures.

8. The battery pack of claim 7, wherein the first aperture extends through the first wall in a first direction in which the first connector does not extend beyond the first wall.

9. The battery pack of claim 8, wherein the insulating member is bonded to the first housing by glue, the glue being disposed in a gap between the first connector and the first wall.

10. The battery pack of claim 6, wherein the first housing includes a second recess on a side facing away from the first recess, the insulator being disposed in the second recess.

11. An electrical device comprising a battery pack as claimed in any one of claims 1 to 10.