CN116097519A

CN116097519A - Battery and electronic device

Info

Publication number: CN116097519A
Application number: CN202080102692.4A
Authority: CN
Inventors: 张国文; 郝胜宇
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2023-05-09
Also published as: WO2022000424A1

Abstract

The application provides a battery, including the casing with set up in electrode assembly in the casing, electrode assembly includes first utmost point ear and second utmost point ear, first utmost point ear with the second utmost point ear accept in the casing. The battery comprises a battery body and is characterized in that the battery body comprises a first shell and a second shell, the battery further comprises a first electronic wire, a first through hole is formed in the first shell, the first electronic wire penetrates through the first shell from the first through hole, a first tab of the electrode assembly is connected with one end of the first electronic wire, and the other end of the first electronic wire is located outside the shell. The battery is connected with electric equipment or a main board of the whole machine through the first electronic wire, and the transfer welding structure of the lug is canceled, so that the process cost is reduced, the connection reliability is improved, and the energy density loss of the battery is reduced. The application also provides an electronic device with the battery.

Description

Battery and electronic device

Technical Field

The present disclosure relates to a battery, and more particularly to a battery and an electronic device having the battery.

Background

In the existing battery, an electric core is arranged inside a shell, a lug is led out to the outside of the shell, in the process of installation or use of the battery, a battery lug is connected with electric equipment or a whole machine main board, a pole is required to be arranged on the shell and electrically connected with the lug, and then the pole is subjected to transfer welding and insulating adhesive pasting, so that the process cost is high, and the reliability of lug welding is insufficient. In addition, the transfer welding structure of the battery tab occupies a large external space, which causes energy density loss of the battery.

Disclosure of Invention

In view of the above-mentioned situation, the present application provides a battery and have electron device of this battery, through setting up battery tab in the casing is inside, sets up the electron line of connecting battery tab on the casing, utilizes the electron line to connect consumer or complete machine mainboard, cancels the transfer welding structure of tab to reduce technology cost, improve the reliability of connection, reduce the energy density loss of battery.

The embodiment of the application provides a battery, including the casing with set up in electrode assembly in the casing, electrode assembly includes first utmost point ear and second utmost point ear, first utmost point ear with the second utmost point ear accept in the casing. The battery comprises a battery body and is characterized in that the battery body comprises a first shell and a second shell, the battery further comprises a first electronic wire, a first through hole is formed in the first shell, the first electronic wire penetrates through the first shell from the first through hole, a first tab of the electrode assembly is connected with one end of the first electronic wire, and the other end of the first electronic wire is located outside the shell.

Further, the first electronic wire comprises a metal wire harness and an insulating layer, the insulating layer is sleeved on the surface of the metal wire harness, one end of the metal wire harness extending into the shell is connected with the first tab, and the insulating layer is fixedly connected with the first shell.

Further, the insulating layer is provided with a first groove, the inner side wall of the first through hole is provided with a first bulge, and the first bulge is arranged in the first groove.

In an alternative embodiment, one end of the insulating layer is provided with a second protrusion, and the second protrusion abuts against the inner side wall of the first shell.

In an alternative embodiment, the insulating layer and the first housing are integrally formed by injection molding.

In an alternative embodiment, the insulating layer is in sealing connection with the first via.

In an alternative embodiment, a first mounting hole is formed in the first tab, and one end of the first electronic wire is fixed in the first mounting hole.

In an alternative embodiment, the first tab and the first electron beam are connected by soldering.

In an alternative embodiment, the battery further includes a second electron beam, a second through hole is formed in the first housing or the second housing, the second electron beam penetrates through the first housing or the second housing from the second through hole, a second electrode of the electrode assembly is electrically connected to one end of the second electron beam, and the other end of the second electron beam is located outside the housing.

In an alternative embodiment, a sealant is disposed at a connection portion between the first electronic wire and the first through hole, and the sealant is attached to an outer side surface of the first housing.

An electronic device comprising a circuit element and the battery of any one of the above, the circuit element being electrically connected to the battery.

According to the battery, the battery electrode lugs are arranged inside the shell, the electronic wires connected with the battery electrode lugs are arranged on the shell, the electronic wires are used for connecting electric equipment or a whole machine main board, and the transfer welding structure of the electrode lugs is canceled, so that the process cost is reduced, the connection reliability is improved, and the energy density loss of the battery is reduced.

Drawings

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

Fig. 2 is a cross-sectional view of the battery shown in fig. 1.

Fig. 3 is a partial enlarged view of the battery shown in fig. 2.

Fig. 4 is a cross-sectional view of a connection structure between the first electron beam and the first housing in an embodiment.

Fig. 5 is a cross-sectional view of a connection structure of the first electron beam and the first housing in an embodiment.

Fig. 6 is a schematic structural diagram of connection between an electron beam and a tab.

Fig. 7 is a cross-sectional view of the first electron beam and the first tab shown in fig. 6.

Fig. 8 is a schematic view of the structure of a battery in an embodiment.

Fig. 9 is a schematic view of the structure of a battery in an embodiment.

Fig. 10 is a cross-sectional view of a housing in one embodiment.

FIG. 11 is a cross-sectional view of a housing in one embodiment.

Fig. 12 is a cross-sectional view of a housing in one embodiment.

Fig. 13 is a cross-sectional view of a housing in one embodiment.

Fig. 14 is a cross-sectional view of a housing in one embodiment.

Fig. 15 is a cross-sectional view of a housing in one embodiment.

Fig. 16 is a schematic view of the structure of the housing in other embodiments.

Fig. 17 is a schematic structural diagram of the first electron beam in other embodiments.

Fig. 18 is a schematic structural diagram of the first electron beam in another embodiment.

Fig. 19 is a block diagram of an electronic device in an embodiment.

Description of main reference numerals:

battery 100

Housing 10

First housing 11

First through hole 111

First protrusion 112

Connection portion 113

Second housing 12

First mounting groove 121

Step surface 1211

Second mounting groove 122

Step surface 1221

Electrode assembly 20

First tab 21

First mounting hole 211

Second lug 22

First electron beam 30

Wire harness 31

Insulating layer 32

First groove 321

Second protrusion 322

Protective layer 33

Second electron beam 40

Sealant 50

Electronic device 200

Circuit element 201

The specific embodiment is as follows:

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

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein 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 application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

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

Referring to fig. 1 and 2, a battery 100 includes a case 10 and an electrode assembly 20 disposed in the case 10, the electrode assembly 20 including a first tab 21, the first tab 21 being received in the case 10. The case 10 includes a first case 11 and a second case 12, the battery 100 further includes a first electron beam 30, a first through hole 111 is formed in the first case 11, the first electron beam 30 penetrates through the first case 11 from the first through hole 111, a first tab 21 of the electrode assembly 20 is connected to one end of the first electron beam 30, and the other end of the first electron beam 30 is located outside the case 10. The cross-sectional shape of the first through hole 111 matches the cross-sectional shape of the first electron beam 30. When the cross-section of the first through hole 111 is rectangular, the range of the length and width is 0.5-5mm.

With continued reference to fig. 3, the first electron beam 30 includes a metal wire bundle 31 and an insulating layer 32, the insulating layer 32 is sleeved on the surface of the metal wire bundle 31, one end of the metal wire bundle 31 extending into the housing 10 is connected to the first tab 21, and the insulating layer 32 is fixedly connected to the first housing 11. The material of the metal wire bundle 31 includes, but is not limited to, a conductive material resistant to an electrolyte such as a steel alloy, an aluminum alloy, an iron alloy, a nickel alloy, etc., and the material of the insulating layer 32 includes, but is not limited to, an insulating material resistant to an electrolyte such as a resin, a polypropylene plastic, a polytetrafluoroethylene plastic fluororubber, etc.

As shown in fig. 3, in the embodiment of the present application, the insulating layer 32 is provided with a first groove 321, the inner sidewall of the first through hole 111 is provided with a first protrusion 112, and the first protrusion 112 is disposed in the first groove 321, so as to improve the connection reliability between the first housing 11 and the first electronic wire 30, and prevent the first electronic wire 30 from falling out from the first through hole 111.

Referring to fig. 4, in an alternative embodiment, a second protrusion 322 is disposed at one end of the insulating layer 32, and the second protrusion 322 abuts against the inner sidewall of the first housing 11. Specifically, the second protrusion 322 may be annular and disposed at an end periphery of the insulating layer 32, so as to prevent the first electron beam 30 from being separated from the first housing 11 under the action of external force. In this embodiment, the first protrusion 112 in the first through hole 111 and the first groove 321 on the insulating layer 32 may be omitted or remained, which is not limited herein.

Referring to fig. 5, in another alternative embodiment, the outer surface of the first electronic wire 30 may be directly connected to the inner surface of the first through hole 111, specifically, the outer sidewall of the insulating layer 32 is fixedly connected to the inner sidewall of the first through hole 111 by means of bonding, welding, hot melting, etc., and the end of the insulating layer 32 extending into the first through hole 111 is flush with the inner sidewall of the first housing 11.

Referring to fig. 3, 4 and 5, the insulating layer 32 is hermetically connected to the first through hole 111, so as to prevent the electrolyte in the case 10 from leaking from the connection between the first case 11 and the first electron beam 30. In an alternative embodiment, a sealant 50 is disposed at the connection between the first electron beam 30 and the first through hole 111, and the sealant 50 is attached to the outer surface of the first housing 11, so as to enhance the sealing performance between the first electron beam 30 and the first housing 11, and further prevent the electrolyte from exuding. The sealant 50 includes, but is not limited to, an epoxy. The epoxy glue has strong sealing performance, and is beneficial to ensuring the sealing reliability between the first electronic wire 30 and the first shell 11.

In the embodiment of the present application, the insulating layer 32 and the first housing 11 are integrally formed by injection molding, so that a gap at a connection position between the first electronic wire 30 and the first housing 11 is reduced or eliminated, thereby realizing a fixed connection and having a sealing function. It will be appreciated that in other embodiments, the insulating layer 32 and the first housing 11 may be sealed by bonding, welding, or the like, which is not limited thereto.

Referring to fig. 6 and 7, the first tab 21 is provided with a first mounting hole 211, and one end of the first electronic wire 30 is fixed in the first mounting hole 211. Specifically, the metal wire harness 31 of the first electron beam 30 is fixed in the first mounting hole 211 and electrically connected to the first tab 21. The first tab 21 is connected to the first electron beam 30 by soldering, and a soldering material may be disposed around the first mounting hole 211. In other embodiments, the wire harness 31 of the first electron beam 30 may be directly welded to the surface of the first tab 21, and the welding method may be soldering, laser welding, or the like, which is not limited thereto.

With continued reference to fig. 1, 8 and 9, the electrode assembly 20 further includes a second tab 22, and the second tab 22 is also received in the case 10. The battery 100 further includes a second electronic wire 40, a second through hole is formed in the first housing 11 or the second housing 12, the second electronic wire 40 penetrates through the first housing 11 or the second housing 12 from the second through hole, the second lug 22 is electrically connected to one end of the second electronic wire 40, and the other end of the second electronic wire 40 is located outside the housing 10. The connection manner between the second electronic wire 40 and the second lug 22 is substantially the same as that of the first electronic wire 30, and will not be described here again. Further, the electrode assembly 20 further includes a first electrode sheet, a separator, and a second electrode sheet, the separator being disposed between the first electrode sheet and the second electrode sheet. The first tab 21 is connected to the first pole piece, and the second tab 22 is connected to the second pole piece.

The second electronic wire 40 may be disposed on the same side of the housing 10 together with the first electronic wire 30, or may be disposed on two opposite sides of the housing 10, or the first electronic wire 30 is disposed on a side of the housing 10, and the second electronic wire is disposed on a top surface or a bottom surface of the housing 10, which is not limited in this application, and the positions of the first electronic wire 30 and the second electronic wire 40 may be set according to actual requirements of products.

Referring to fig. 10, the first housing 11 is substantially cover-shaped, the second housing 12 is a hollow structure with an opening at one end, and the first housing 11 is disposed at the opening end of the second housing 12. The first casing 11 and the second casing 12 are connected in a plane, and a sealing material can be arranged at the joint of the first casing 11 and the second casing 12 to prevent the electrolyte from seeping out from the joint of the first casing 11 and the second casing 12. The first shell 11 and the second shell 12 can be connected into a whole through gluing, heat sealing, welding and other modes, so that the inner cavities of the first shell 11 and the second shell 12 are completely isolated from the outer surface, and the electrochemical stability of the inner cavities is ensured. In the embodiment of the present application, the first housing 11 and the second housing 12 have a left-right connection structure. Referring to fig. 12, the first housing and the second housing 12 may be in an up-down connection structure, which is not limited in this application.

Referring to fig. 11 and 13, the first housing 11 and the second housing 12 are hollow structures with an opening at one end, and the opening end of the first housing 11 is buckled with the opening end of the second housing 12 in a planar connection manner. The first casing 11 and the second casing 12 may be disposed in a left-right direction or in a vertical direction, and the present application is not limited thereto.

Referring to fig. 14, the first housing 11 is a cover-shaped structure, the second housing 12 is a hollow structure with an opening at one end, a first mounting groove 121 is disposed at the opening end of the second housing, and the first mounting groove 121 is disposed on an inner sidewall of the second housing 12 and surrounds the opening end of the second housing 12. The side surface of the first housing 11 facing the second housing 12 abuts against the step surface 1211 of the first mounting groove 121, and the side edge of the first housing 11 is fixed in the first mounting groove 121, so that the first housing 11 is fixed and covers the open end of the second housing 12 to close the second housing 12.

Referring to fig. 15, in an alternative embodiment, a second mounting groove 122 is formed on one side of the open end of the second housing 12, and the second mounting groove 122 is located on the outer side wall of the second housing 12. A connection portion 113 is provided at one side of the first housing 11, the connection portion 113 is matched with the second mounting groove 122, and the connection portion 113 is provided in the second mounting groove 122. The end of the connecting portion 113 abuts against the step surface 1221 of the second mounting groove 122, and the other side of the opening end of the second housing 12 is planar connected with the first housing 11, so that the connection structure between the first housing 11 and the second housing 12 is diversified, and the sealing performance of the housing 10 is improved.

Referring to fig. 16, in the embodiment of the present application, the cross-sectional shape of the housing 10 is substantially rectangular, and in other embodiments, the cross-sectional shape of the housing 10 further includes, but is not limited to, circular, polygonal, triangular, irregular, etc., and may be designed according to actual product requirements. The materials of the first housing 11 and the second housing 12 include, but are not limited to, liquid crystal high molecular polymers, resins, polyvinyl fluoride, polyimide, polycarbonate, and other electrolyte-resistant hard plastics. When the casing 10 is in a cuboid shape, the length and width of the first casing 11 and/or the second casing 12 are in a range of 5-200mm, the depth is in a range of 1-100mm, and the height is in a range of 0.1-10mm so as to adapt to electrode assemblies 20 with different sizes and specifications. Referring to fig. 17, in the embodiment of the present application, the cross-sectional shape of the first electron beam 30 is substantially circular, and in other embodiments, the cross-sectional shape of the first electron beam 30 includes, but is not limited to, elliptical, rectangular, polygonal, irregular, etc.

Referring to fig. 18, the first electron beam 30 may further include a protective layer 33, wherein the protective layer 33 is disposed between the wire harness 31 and the insulating layer 32. The insulating layer 32 and the protective layer 33 may cooperate to improve the insulating and sealing properties of the outer surface of the first electron beam 30. The material of the protective layer 33 includes, but is not limited to, a plastic material such as a liquid crystal polymer, a resin, a polyvinyl fluoride, a polyimide, a polycarbonate, etc., which is resistant to abrasion and high temperature and electrolyte. It is understood that the first electron beam 30 may be further provided with a multi-layered protective layer 33 according to an actual use environment, which is not limited thereto.

Referring to fig. 19, one embodiment of the present application further provides an electronic device 200, where the electronic device 200 includes a circuit element 201 and the battery 100 in any of the above embodiments, and the circuit element 201 is electrically connected to the battery 100. Specifically, the circuit element 201 may be directly connected to the first and

second electron lines

30 and 40 of the battery 100, or may be connected to the first and

second electron lines

30 and 40 of the battery 100 through a circuit board.

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

Claims

A battery, comprising:

a housing; and

the electrode assembly is arranged in the shell and comprises a first tab and a second tab, and the first tab and the second tab are accommodated in the shell;

the battery is characterized in that the shell comprises a first shell and a second shell, the battery further comprises a first electronic wire, a first through hole is formed in the first shell, the first electronic wire penetrates through the first shell from the first through hole, a first tab of the electrode assembly is connected with one end of the first electronic wire, and the other end of the first electronic wire is located outside the shell.
The battery of claim 1, wherein the first electron beam comprises a wire harness and an insulating layer, the insulating layer is sleeved on the surface of the wire harness, one end of the wire harness extending into the shell is connected with the first tab, and the insulating layer is fixedly connected with the first shell.
The battery of claim 2, wherein the insulating layer is provided with a first recess, and wherein the inner sidewall of the first through hole is provided with a first protrusion, and wherein the first protrusion is disposed in the first recess.
The battery of claim 2, wherein one end of the insulating layer is provided with a second protrusion that abuts the inner sidewall of the first case.
The battery of claim 2, wherein the insulating layer is integrally molded with the first housing by injection molding.
The battery of claim 2, wherein the insulating layer is sealingly connected to the first through-hole.
The battery of claim 1, wherein the first tab is provided with a first mounting hole, and one end of the first wire is fixed in the first mounting hole.
The battery of claim 1, wherein the first tab is connected to the first electron beam by brazing.
The battery of claim 1, further comprising a second electron beam, wherein the first housing or the second housing is provided with a second through hole, the second electron beam penetrates through the first housing or the second housing from the second through hole, a second electrode tab of the electrode assembly is electrically connected to one end of the second electron beam, and the other end of the second electron beam is located outside the housing.
The battery of claim 1, wherein a sealant is disposed at a junction of the first electron beam and the first through hole, the sealant being attached to an outer side surface of the first case.
An electronic device comprising a circuit element and the battery of any one of claims 1-10, the circuit element being electrically connected to the battery.