CN114039140B

CN114039140B - Battery and electric equipment

Info

Publication number: CN114039140B
Application number: CN202111302235.2A
Authority: CN
Inventors: 谢为
Original assignee: Dongguan Nvt Technology Co Ltd
Current assignee: Dongguan Nvt Technology Co Ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2023-02-28
Anticipated expiration: 2041-11-04
Also published as: CN114039140A

Abstract

The application discloses a battery and electric equipment with the battery. The battery comprises a battery core, a circuit board, a shell assembly and a filling piece. The circuit board is connected with the battery core, and a plurality of conductive parts are arranged on the circuit board at intervals. The housing assembly includes a first housing. The first housing includes a first wall and two second walls. The first wall is provided with a plurality of first openings. The conductive portion exposes the first wall from the first opening. The two second walls are oppositely arranged on the first wall along the first direction. The circuit board is located between the two second walls. Each second wall includes a first section and a second section. Along the first direction, projections of the plurality of conductive parts on the second wall are positioned in the first section. A first gap is formed between the first section and the circuit board, and a second gap is formed between the second section and the circuit board. The width of the first gap is greater than the width of the second gap along the first direction. By increasing the width of the first gap, the filling member can fill the first gap with less moisture.

Description

Battery and electric equipment

Technical Field

The application relates to the technical field of energy storage, in particular to a battery and electric equipment.

Background

Injection molded steel-can batteries typically require an opening through which the battery is connected to an external device. However, a gap is formed between the circuit board and the shell, and moisture easily permeates into the steel shell injection-molded battery from the gap through the opening, so that the battery fails.

Disclosure of Invention

Accordingly, there is a need for a battery and an electrical device that can reduce moisture from entering the battery.

An embodiment of the application provides a battery, including electric core, circuit board, casing subassembly and filler. The circuit board is connected with the battery cell and is provided with a plurality of conductive parts at intervals. The housing assembly includes a first housing. The first housing accommodates at least a portion of the circuit board. The first housing includes a first wall and two second walls. The first wall is provided with a plurality of first openings. The conductive portion exposes the first wall from the first opening. The two second walls are oppositely arranged on the first wall along the first direction. The circuit board is located between the two second walls. Each second wall includes a first section and a second section. Along the first direction, projections of the conductive parts on the second wall are positioned in the first section. A first gap is formed between the first section and the circuit board, and a second gap is formed between the second section and the circuit board. The first gap has a first width along the first direction, the second gap has a second width along the first direction, and the first width is greater than the second width. The filler is disposed in the first gap and blocks the communication between the plurality of first openings and the interior space of the housing assembly.

The embodiment of the application comprises the following technical effects: by increasing the width of the first gap, the filling piece can be conveniently filled into the first gap, the first gap corresponds to the positions of the plurality of conductive parts, and moisture can be reduced from entering the battery.

Optionally, in some embodiments of the present application, each first section is provided with a first structural member, and the first structural member contacts with the circuit board to position the circuit board.

The embodiment of the application comprises the following technical effects: the position of the conductive part is corresponding to the position of the first opening, and the deviation of the conductive part is reduced.

Optionally, in some embodiments of the present application, the first structural member has a length L1, L1 ≦ 1mm in 0.2mm ≦ along the first direction.

Optionally, in some embodiments of the present application, a thickness of the first section is less than a thickness of the second section along the first direction.

Optionally, in some embodiments of the present application, the casing assembly further comprises a second casing disposed on the first casing, the second casing housing at least a portion of the battery cell.

Optionally, in some embodiments of the present application, the first section includes a first portion and a second portion arranged in a second direction, the second portion connects the second section, and a distance between the second portion and the circuit board in the second direction is smaller than a distance between the first portion and the circuit board.

Optionally, in some embodiments of the present application, the filling member has insulation, and the filling member is adhered in the first gap.

Optionally, in some embodiments of the present application, the first width is d1, d1 is greater than or equal to 0.2mm and less than or equal to 1mm, and the second width is d2, and d2 is greater than or equal to 0.2mm along the first direction.

Optionally, in some embodiments of the present application, the length of the first section is d3, 10mm ≦ d3 ≦ 20mm, and the length of the second section is d4, 30mm ≦ d4 ≦ 100mm, along the second direction.

Optionally, in some embodiments of the present application, the first section has a thickness h1,0.15mm ≦ h1 ≦ 0.35mm in the first direction.

Optionally, in some embodiments of the present application, the first section is provided with a second opening from which the filler enters the first gap.

Drawings

Fig. 1 shows a schematic diagram of the structure of a battery in some embodiments.

Fig. 2 shows a cross-sectional view of the battery along II-II in some embodiments.

Fig. 3 shows a schematic structural view of the first housing in some embodiments.

Fig. 4 shows a schematic diagram of the structure of the first housing and the circuit board in some embodiments.

Fig. 5 shows a schematic diagram of the structure of the electric device in some embodiments.

Description of the main element symbols:

battery 100

Battery cell 10

Cell casing 111

Electrode terminal 112

Circuit board 20

Conductive part 21

Third opening 22

Housing assembly 30

First opening 30a

First housing 31

First wall 311

Second wall 312

First end 313

First concave portion 313a

Second concave portion 313b

Second end 314

Third recess 314a

Fourth concave portion 314b

First section 312a

First portion 3121

Second portion 3122

First structural member 3123

Second structure 3124

Second section 312b

First gap 30b

Second gap 30c

Second housing 32

Power utilization device 200

A first direction X

Second direction Y

The following specific examples will further illustrate the application in conjunction with the above figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments.

When an element is referred to as being "on" 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.

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.

It will be understood that when two elements are disposed in parallel/perpendicular relationship, the angle between the elements can be between 0 and 5% tolerance, for example when the elements are perpendicular and one element is tilted toward or away from the other element, the tolerance between the elements is greater than 0 ° and less than or equal to 4.5 °.

The embodiment of the application provides a battery and electric equipment with the battery. The battery comprises a battery core, a circuit board, a shell assembly and a filling piece. The circuit board is connected with the battery core, and a plurality of conductive parts are arranged on the circuit board at intervals. The housing assembly includes a first housing. The first housing accommodates at least a portion of the circuit board. The first housing includes a first wall and two second walls. The first wall is provided with a plurality of first openings. The plurality of first openings are arranged corresponding to the plurality of conductive parts. The two second walls are oppositely arranged on the first wall along the first direction. The circuit board is located between the two second walls. Each second wall includes a first section and a second section. Along the first direction, projections of the plurality of conductive parts on the second wall are positioned in the first section. A first gap is formed between the first section and the circuit board, and a second gap is formed between the second section and the circuit board. The first gap has a first width along the first direction, the second gap has a second width along the first direction, and the first width is greater than the second width. The filling member is disposed in the first gap and blocks the plurality of first openings from communicating with the interior space of the housing assembly.

In the battery and the electric equipment, the width of the first gap is increased, so that the filling piece can be conveniently filled in the first gap, and the first gap corresponds to the positions of the plurality of conductive parts, so that moisture is reduced from entering the battery.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following embodiments, features of the embodiments may be combined with each other without conflict.

Referring to fig. 1 and 2, an embodiment of the present application provides a battery 100, which includes a battery cell 10, a circuit board 20, a casing assembly 30, and a filling member (not shown). The battery core 10 is connected with the circuit board 20. The housing assembly 30 is provided with a plurality of first openings 30a, and at least a portion of the circuit board 20 is disposed in the housing assembly 30. The external electric device is connected to the circuit board 20 through the plurality of first openings 30a to connect the battery cells 10. The filler is disposed in the gap between the circuit board 20 and the case assembly 30 and blocks the communication between the plurality of first openings 30a and the inner space of the case assembly 30, thereby reducing the entrance of external moisture into the battery 100 through the gap between the circuit board 20 and the case assembly 30.

In one embodiment, the battery cell 10 includes a cell casing 111, an electrode assembly (not shown) disposed in the cell casing 111, and an electrode terminal 112 connected to the electrode assembly and led out of the cell casing 111. In one embodiment, the electrode assembly includes a winding structure formed by winding a positive electrode tab, a negative electrode tab, and a separator. In other embodiments, the electrode assembly may also be a laminated structure in which a positive electrode sheet, a separator, and a negative electrode sheet are sequentially laminated. The electrode terminals 112 are electrically connected to the circuit board 20 by, for example, soldering, conductive adhesive bonding, or other connection means. Optionally, the cell casing 111 includes an aluminum plastic film. Optionally, the battery cell 10 includes a soft package battery cell. Alternatively, the battery cell 10 may be a single battery cell, or may be a plurality of battery cells stacked in the first direction X.

The circuit board 20 is provided with a plurality of conductive portions 21 at intervals, and the external device is connected to the corresponding conductive portion 21 through the first opening 30a. In one embodiment, the conductive portion 21 is a gold finger structure. In one embodiment, the circuit board 20 may be a circuit board with a battery management system for intelligently managing and maintaining each battery unit, reducing the occurrence of over-charge and over-discharge of the battery, prolonging the service life of the battery, and monitoring the status of the battery.

Referring to fig. 3 and 4, the housing assembly 30 includes a first housing 31, and the first housing 31 accommodates at least a portion of the circuit board 20. The first housing 31 includes a first wall 311 and two second walls 312. The first wall 311 is provided with a plurality of first openings 30a arranged at intervals. The plurality of first openings 30a are provided corresponding to the plurality of conductive portions 21, and the conductive portions 21 expose the first walls 311 from the first openings 30a. The two second walls 312 are oppositely disposed along the first direction X, and the two second walls 312 are located on the same side of the first wall 311 along the length direction of the battery. The circuit board 20 is disposed between the two second walls 312. The circuit board 20 is also connected in contact with the first wall 311 to reduce the gap between the circuit board 20 and the first wall 311.

Each second wall 312 includes a first section 312a and a second section 312b. The first section 312a and the second section 312b are disposed along a second direction Y, which is perpendicular to the first direction X. The first segment 312a is disposed corresponding to the plurality of conductive portions 21. Specifically, along the first direction X, projections of the plurality of conductive portions 21 on the second wall 312 are located within the first section 312 a. That is, along the second direction Y, the length of the first section 312a is greater than or equal to the distance between the edges of the outermost two first openings 30a of the plurality of first openings 30a. The edge refers to an edge of the outermost two first openings 30a away from the other first openings 30a. In one embodiment, the second sections 312b are disposed at least two, and two second sections 312b connect two ends of the first section 312a along the second direction Y.

The first section 312a has a first gap 30b with the circuit board 20, and the second section 312b has a second gap 30c with the circuit board 20. The first gap 30b has a first width along the first direction X, and the second gap 30c has a second width along the first direction X. The first width is larger than the second width, and the filling member is conveniently filled in the first gap 30b by increasing the width of the first gap 30b, and the first gap 30b corresponds to the positions of the plurality of conductive parts 21, so that the moisture entering into the battery 100 is reduced, and the risk that the moisture corrodes the conductive parts 21 is reduced.

In one embodiment, the first section 312a is provided with a second opening (not shown) to facilitate the filler to enter between the first shell 31 and the second shell 32 from the second opening.

In one embodiment, the first width is d1, d1 is 0.2mm ≦ d1 ≦ 1mm, and d1 may be any one of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, and 1mm. The second width is d2, d2 is more than 0mm and less than or equal to 0.2mm, and d2 can be any one of 0.05mm, 0.1mm, 0.15mm and 0.2mm.

In one embodiment, the length of the first section 312a along the second direction Y is d3, d3 is 10mm ≦ 20mm, and d3 may be any one of 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, and 20 mm. The length of the second section 312b is d4, the length of the second section 312b is the difference between the length of the second wall 312 and the length of the first section 312a, d4 is 30mm ≦ d4 ≦ 100mm, d4 may be any one of 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm.

In an embodiment, along the first direction X, the thickness of the first section 312a is smaller than the thickness of the second section 312b. The first section 312a has a thickness h1,0.15mm ≦ h1 ≦ 0.35mm, and h1 may be any one of 0.15mm, 0.17mm, 0.19mm, 0.21mm, 0.23mm, 0.25mm, 0.27mm, 0.29mm, 0.31mm, 0.33mm, and 0.35mm in the first direction X.

In one embodiment, the second section 312b has a thickness h2,0.20mm ≦ h2 ≦ 0.45mm, and h2 may be any one of 0.20mm, 0.22mm, 0.24mm, 0.26mm, 0.28mm, 0.30mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, 0.40mm, 0.42mm, 0.44mm, and 0.45mm along the first direction X.

In an embodiment, the casing assembly 30 further includes a second casing 32, and the second casing 32 is connected to the first casing 31 for accommodating at least a portion of the battery cell 10. In one embodiment, the filler is insulative and is adhered to the first gap 30 b. The filling member includes one of a gel and a resin. The colloid comprises polyurethane pouring sealant. Taking resin as an example, in the filling, first, the resin is injected into the space between the first case 31 and the second case 32 at a low pressure, the battery cell 10 is fixed in the second case 32 by the resin, and then the resin is filled between the circuit board 20 and the second wall 312 through the first gap 30 b.

Referring to fig. 3 and 4, in an embodiment, the first section 312a includes a first portion 3121 and a second portion 3122 arranged along the second direction Y, the second portion 3122 is connected to the second section 312b, and a distance between the second portion 3122 and the circuit board 20 along the second direction Y is smaller than a distance between the first portion 3121 and the circuit board 20. In one embodiment, the first portion 3121 has two ends connected to the second portion 3122. The distance between the second portion 3122 and the circuit board 20 gradually decreases from the first section 312a to the second section 312b, and is smaller than the distance between the first portion 3121 and the circuit board 20.

In an embodiment, each first segment 312a is provided with a first structural member 3123, the first structural member 3123 extends along the first direction X for contacting with the circuit board 20 to position the circuit board 20, so that the conductive portion 21 corresponds to the first opening 30a, and the offset of the conductive portion 21 is reduced. In one embodiment, the length of the first structural member 3123 along the first direction X is L1, L1 is 0.2mm ≦ L1 ≦ 1mm, and L1 may be any one of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, and 1.0 mm.

It is understood that first structure member 3123 may be provided at first portion 3121, and second portion 3122 may also be provided. The number of the first structural members 3123 may be set to 1, 2, 3, etc., and may be adjusted as needed, again without limitation.

Referring to fig. 1 and 2, in an embodiment, the first shell 31 has a first end 313 and a second end 314 arranged along the second direction Y, and the first opening 30a is located between the first end 313 and the second end 314. The first end 313 is provided with a first recess 313a and a second recess 313b, the first recess 313a and the second recess 313b being arranged along the first direction X. The second end 314 is provided with a third recess 314a and a fourth recess 314b, and the third recess 314a and the fourth recess 314b are provided along the first direction X. The first recess 313a, the second recess 313b, the third recess 314a, and the fourth recess 314b are used to cooperate with an external electric device, and the first recess 313a and the second recess 313b facilitate positioning of the battery 100 and installation of the battery 100.

It is to be understood that the positions of the first, second, third and

fourth recesses

313a, 313b, 314a, 314b are not limited to being provided at the first and second ends 313, 314, and may be adjusted according to the external power consumption device, for example, the recesses may be provided at the middle position or the middle two-thirds position of the first housing 31.

Referring to fig. 3 and 4, in an embodiment, the first wall 311 is further provided with a second structure member 3124, and the second structure member 3124 is protruded on a surface of the first wall 311 for cooperating with the circuit board 20 to further position the circuit board 20. Further, the circuit board 20 is provided with a third opening 22, and the second structure member 3124 is provided in the third opening 22. Preferably, the third opening 22 is provided at an edge position of the circuit board 20. The shape of the third opening 22 matches with that of the second structure member 3124, for example, along a direction perpendicular to the surface of the circuit board 20, the projection of the second structure member 3124 is semicircular, the projection of the third opening 22 is semicircular, and the second structure member 3124 is connected to the edge of the third opening 22 in a contact manner. It is understood that the shapes of the second structure 3124 and the third opening 22 are not limited to the above definition, and may have other structures, such as rectangular, oval, etc. Referring to fig. 5, the present application further provides an electric device 200 using the battery 100. In one embodiment, the electric device 200 of the present application may be, but is not limited to, a portable facsimile machine, a portable copier, a portable printer, a video recorder, a handheld cleaner, a transceiver, a backup power source, an electric car, an electric motorcycle, an electric power assisted bicycle, an electric power tool, a household large-sized battery, and the like.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not used as limitations of the present application, and that suitable modifications and variations of the above embodiments are within the scope of the present disclosure as long as they are within the spirit and scope of the present application.

Claims

1. A battery, comprising:

an electric core;

the circuit board is connected with the battery cell and is provided with a plurality of conductive parts at intervals;

a housing assembly including a first housing containing at least a portion of the circuit board;

the first shell comprises a first wall and two second walls, the first wall is provided with a plurality of first openings, the conductive part exposes out of the first wall from the first openings, the two second walls are oppositely arranged on the first wall along a first direction, and the circuit board is positioned between the two second walls;

each of the second walls includes a first section and a second section, projections of the conductive portions on the second walls in the first direction are located in the first section, and the thickness of the first section in the first direction is smaller than that of the second section;

a first gap is arranged between the first section and the circuit board, a second gap is arranged between the second section and the circuit board, the first gap has a first width along the first direction, the second gap has a second width along the first direction, the first width is greater than the second width, and along the first direction, the first width is d1, and d1 is greater than or equal to 0.2mm and less than or equal to 1mm;

and the filling piece is arranged in the first gap and is used for isolating the communication between the first openings and the inner space of the shell assembly.

2. The battery of claim 1 wherein each of said first sections has a first structural member that contacts said circuit board to position said circuit board.

3. The battery of claim 2, wherein the first structural member has a length L1,0.2mm ≦ L1 ≦ 1mm along the first direction.

4. The battery of claim 1, wherein the housing assembly further comprises a second housing disposed on the first housing, the second housing containing at least a portion of the cell.

5. The battery of claim 1, wherein the first section includes a first portion and a second portion disposed along a second direction, the second portion connecting the second section, the second direction being a distance from the circuit board that is less than a distance from the first portion to the circuit board.

6. The battery of claim 1, wherein the filler is insulative and the filler is adhered in the first gap.

7. The battery of claim 1, wherein the second width is d2,0mm < d2 ≦ 0.2mm in the first direction.

8. The battery of claim 5, wherein along the second direction, the first segment has a length d3, 10mm ≦ d3 ≦ 20mm, and the second segment has a length d4, 30mm ≦ d4 ≦ 100mm.

9. The battery of claim 1, wherein the first segment has a thickness h1,0.15mm ≦ h1 ≦ 0.35mm along the first direction.

10. An electrical consumer, characterized in that it comprises a battery according to any one of claims 1-9.