CN220021545U

CN220021545U - Connecting device, battery and electronic equipment

Info

Publication number: CN220021545U
Application number: CN202321372395.9U
Authority: CN
Inventors: 周继浩; 蔡小丽; 周耀华; 欧阳进忠
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-11-14
Anticipated expiration: 2033-05-31

Abstract

The embodiment of the utility model discloses a connecting device, a battery and electronic equipment, wherein the connecting device comprises a temperature circuit breaker, and the temperature circuit breaker is provided with a first connecting end and a second connecting end; the printed circuit board is provided with a first conductive piece, a second conductive piece and a third conductive piece; the first conductive piece is used for being electrically connected with one tab of the battery cell, the second conductive piece is electrically connected with the first connecting end, the third conductive piece is electrically connected with the second connecting end, and the third conductive piece is used for being electrically connected with the other tab of the battery cell.

Description

Connecting device, battery and electronic equipment

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a connecting device, a battery and electronic equipment.

Background

In the prior art, in the battery industry, a temperature breaker is used as a final stage protection circuit of a battery protection circuit, and a battery core and the temperature breaker are combined into a whole for testing.

Among them, the temperature circuit breaker generally includes a body, an input connection arm, and an output connection arm arranged in series in a length direction. When the temperature circuit breaker is used, the input connecting arm and the output connecting arm are respectively connected with one connecting sheet, and the two connecting sheets are respectively electrically connected with the connecting sheet on the printed circuit board and the lug of the battery cell so as to realize the assembly of the temperature circuit breaker.

However, the temperature circuit breaker assembled in the above manner includes the connection pieces having various shapes, and has problems of secondary connection and processing, so that the versatility of the temperature circuit breaker is deteriorated.

Disclosure of Invention

The utility model aims to provide a novel technical scheme of a connecting device, a battery and electronic equipment.

According to a first aspect of the present utility model there is provided a connection device comprising:

a temperature circuit breaker having a first connection end and a second connection end;

the printed circuit board is provided with a first conductive piece, a second conductive piece and a third conductive piece; wherein,

the first conductive piece is used for being electrically connected with one tab of the battery cell, the second conductive piece is electrically connected with the first connecting end, the third conductive piece is electrically connected with the second connecting end, and the third conductive piece is used for being electrically connected with the other tab of the battery cell.

Optionally, the first conductive element is disposed on a side of the second conductive element facing away from the third conductive element; or,

the first conductive piece is arranged on one side of the third conductive piece, which is away from the second conductive piece.

Optionally, the second connection end and the second conductive member are welded and fixed.

According to a second aspect of the present utility model, there is further provided a battery, including a battery cell and the connection device of the first aspect, wherein one tab of the battery cell is electrically connected to the first conductive member, and the other tab of the battery cell is electrically connected to the third conductive member.

Optionally, a sealing step is arranged at the end part of the battery cell, and the sealing step comprises a first step surface and a second step surface which are perpendicular to each other; wherein,

an accommodating space for accommodating the temperature circuit breaker is formed between the first step surface and the second step surface, and the electrode lugs of the battery core extend out along the second step surface.

Optionally, the surface of the sealing step is provided with an insulating gasket, and the insulating gasket comprises a first support arm and a second support arm which are perpendicular to each other; wherein,

the first support arm is connected with the first step surface, the second support arm is attached to the second step surface, and the temperature breaker is arranged on the surface of one side, far away from the second step surface, of the second support arm.

Optionally, the temperature breaker and the second support arm are fixed by heat conduction adhesive.

Optionally, the insulating spacer is made of an elastic insulating material.

Optionally, at least one side edge of the battery cell is provided with a side adhesive tape, and the side adhesive tape is used for protecting the edge of the battery cell.

Optionally, the side gummed paper is set to be C-shaped or L-shaped.

According to a third aspect of the present utility model, there is also provided an electronic device comprising the battery of the second aspect.

The utility model has the technical effects that: a novel connection mode of a temperature circuit breaker, a battery core and a printed circuit board is provided. The two ends of the temperature circuit breaker are respectively connected with the second conductive piece and the third conductive piece led out by the printed circuit board, so that the temperature circuit breaker does not need to be externally connected with a connecting piece, and the temperature circuit breakers with different specifications can be installed by using the connecting device provided by the utility model, thereby ensuring the universality of connecting materials and simplifying the production process and the materials.

Other features of the present utility model and its advantages will become apparent from the following detailed description of exemplary embodiments of the utility model, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second embodiment of a battery;

fig. 3 is a schematic structural diagram of a connection device according to an embodiment of the present utility model;

fig. 4 is a third schematic structural diagram of a battery according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a battery cell; 11. a sealing step; 12. an insulating spacer; 121. a first arm; 122. a second arm; 13. side gummed paper; 2. a first tab; 3. a second lug; 4. a temperature circuit breaker; 41. a first connection end; 42. a second connection end; 5. a printed circuit board; 51. a first conductive member; 52. a second conductive member; 53. and a third conductive member.

Detailed Description

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Referring to fig. 1-4, the present utility model discloses a connection device comprising:

a temperature circuit breaker 4, the temperature circuit breaker 4 having a first connection end 41 and a second connection end 42;

a printed circuit board 5, wherein a first conductive member 51, a second conductive member 52 and a third conductive member 53 are arranged on the printed circuit board 5; wherein,

the first conductive member 51 is configured to be electrically connected to one tab of the electrical core 1, the second conductive member 52 is electrically connected to the first connection end 41, the third conductive member 53 is electrically connected to the second connection end 42, and the third conductive member 53 is configured to be electrically connected to another tab of the electrical core.

Referring to fig. 1, the connection device includes a temperature breaker 4 and a printed circuit board 5. The temperature breaker 4 is, for example, a recoverable temperature breaker, the internal resistance of the temperature breaker is unchanged after the operation, the service life is long, and the safety and the reliability of the battery are enhanced.

Referring to fig. 2, the temperature circuit breaker 4 has a first connection terminal 41 and a second connection terminal 42 disposed opposite to each other. The printed circuit board 5 is provided with a first conductive member 51, a second conductive member 52, and a third conductive member 53.

In the embodiment of the present utility model, the first conductive member 51, the second conductive member 52 and the third conductive member 53 are, for example, nickel sheets, and at least one of the first conductive member 51, the second conductive member 52 and the third conductive member 53 is fixedly connected to the printed circuit board 5 by soldering, so that the mechanical connection and the electrical connection between at least one of the first conductive member 51, the second conductive member 52 and the third conductive member 53 and the printed circuit board 5 are achieved.

The first conductive member 51 is configured to be electrically connected to one tab of the battery cell 1, and the third conductive member 53 is configured to be electrically connected to the other tab of the battery cell. The battery cell 1 includes two tabs with opposite polarities, such as a first tab and a second tab. When the first tab is a positive tab, the second tab is a negative tab. When the first tab is a negative tab, the second tab is a positive tab. The first conductive member 51 on the printed circuit board 5 is electrically connected to the first tab (e.g., the positive tab) of the battery cell 1, while the second tab (e.g., the negative tab) of the battery cell 1 is electrically connected to the third conductive member 53 of the printed circuit board 5, so as to realize electrical connection between the printed circuit board 5 and the battery cell 1.

Referring to fig. 3, the first connection terminal 41 of the temperature circuit breaker 4 is electrically connected with the second conductive member 52, and the second connection terminal 42 of the temperature circuit breaker 4 is electrically connected with the third conductive member 53 to achieve electrical connection between the temperature circuit breaker 4 and the printed circuit board 5.

In assembling the battery of the present utility model, first, the first conductive member 51, the second conductive member 52, and the third conductive member 53 are provided on the printed circuit board 5. Wherein the distance between the second conductive member 52 and the third conductive member 53 is adjusted accordingly according to the size of the temperature circuit breaker 4. Then, the first connection end 41 and the second connection end 42 of the temperature circuit breaker 4 are respectively connected with the second conductive member 52 and the third conductive member 53 correspondingly, that is, the temperature circuit breaker 4 is assembled with the printed circuit board 5. And then the printed circuit board 5 provided with the temperature breaker 4 is connected with the first electrode lug 2 and the second electrode lug 3 of the battery cell 1, so that the assembly between the battery cell 1 and the printed circuit board 5 is completed.

The temperature breaker 4 is used as the last stage of protection circuit of the battery protection circuit, and the battery cell 1 needs to be combined with the temperature breaker 4 into a whole for testing. The temperature circuit breaker 4 generally includes a body, an input connection arm, and an output connection arm arranged in series in a length direction.

In the prior art, one installation mode of the temperature circuit breaker 4 is that a connecting piece is respectively connected to an input connecting arm and an output connecting arm, and the two connecting pieces are respectively electrically connected with the connecting piece on the printed circuit board 5 and the tab of the battery core 1, so as to realize the assembly of the temperature circuit breaker 4. However, the temperature circuit breaker 4 assembled in the above manner includes connecting pieces of different shapes, and has problems of secondary connection and processing, so that the temperature circuit breaker 4 with universality can only be used for a specific battery, the universality of the temperature circuit breaker 4 is poor, and poor material quality is easily caused under the conditions of project design change, market change and the like, and waste of manpower and material resources is caused.

The utility model provides a connecting device, namely a new way for electrically connecting the temperature circuit breaker 4 with the battery core 1 and the printed circuit board 5, which can be suitable for the temperature circuit breakers 4 with different specifications, thereby improving the application range of the connecting device. The first conductive piece 51, the second conductive piece 52 and the third conductive piece 53 are arranged on the printed circuit board 5, so that two ends of the temperature breaker 4 can be respectively and directly connected with the second conductive piece 52 and the third conductive piece 53 led out by the printed circuit board 5, and the temperature breaker 4 does not need to be externally connected with a connecting sheet, so that the temperature breaker 4 with different specifications can be adapted, the universality of connecting materials is ensured, and the production process and the materials are simplified.

Meanwhile, even if the stress is generated by the bending deformation of the printed circuit board 5, the contact between the first connection end 41 and the second conductive member 52, and the contact between the second connection end 42 and the third conductive member 53 of the temperature circuit breaker 4 are not affected, and the impedance of the temperature circuit breaker 4 is not affected, thereby ensuring the reliability of the battery.

In addition, in the assembled battery structure, two ends of the temperature breaker 4 are physically connected with the battery core 1 through connecting sheets, so that the safety certification requirement is met.

In the embodiment of the present utility model, the first conductive element 51 is disposed at a side of the second conductive element 52 facing away from the third conductive element 53; or,

the first conductive member 51 is disposed on a side of the third conductive member 53 facing away from the second conductive member 52.

Referring to fig. 1, in one embodiment of the present utility model, the first conductive member 51, the second conductive member 52, and the third conductive member 53 are sequentially arranged along the first direction. That is, the second conductive member 52 is disposed between the first conductive member 51 and the third conductive member 53.

Of course, according to practical design requirements, the first conductive member 51, the third conductive member 53, and the second conductive member 52 may be designed to be sequentially arranged along the first direction. That is, the third conductive member 53 is disposed between the first conductive member 51 and the second conductive member 52.

In the embodiment of the present utility model, the second connection end 42 is welded and fixed to the second conductive member 52.

Specifically, the second connection end 42 of the temperature breaker 4 may be connected to a pad on the printed circuit board 5 by SMT reflow soldering, and may of course be soldered to a pad of the printed circuit board 5 or a nickel strap of a pad by laser soldering, resistance soldering, or the like.

The utility model also discloses a battery, which comprises the battery core 1 and the connecting device, wherein one tab of the battery core 1 is electrically connected with the first conductive piece 51, and the other tab of the battery core 1 is electrically connected with the third conductive piece 53.

Referring to fig. 2, the battery includes at least one cell 1, and the cell 1 is provided with a first tab 2 and a second tab 3 having opposite polarities. When the battery includes at least two electric cores 1, the electric cores 1 are arranged side by side, and preferably, the first tab 2 and the second tab 3 are arranged on the same side of the electric core 1. The first tabs 2 and the second tabs 3 may be disposed on the same side of the battery cell 1, and of course, the first tabs 2 and the second tabs 3 may be disposed on different sides of the battery cell 1.

One tab of the battery cell 1 is electrically connected to the first conductive member 51, and the other tab of the battery cell 1 is electrically connected to the third conductive member 53. The electrical core 1 is electrically connected to the printed circuit board 5 via the first conductive element 51 and the third conductive element 53.

In the embodiment of the utility model, a sealing step 11 is arranged at the end part of the battery cell 1, and the sealing step 11 comprises a first step surface and a second step surface which are mutually perpendicular; wherein,

an accommodating space for accommodating the temperature circuit breaker 4 is formed between the first step surface and the second step surface, and the tab of the battery cell 1 extends out along the second step surface. Referring to fig. 2, one end of the battery cell 1 is provided with a sealing step 11, and a first step surface and a second step surface which are perpendicular to each other are formed at the sealing step 11, for example, through an aluminum plastic film, and an accommodating space is formed between the first step surface and the second step surface. The accommodation space accommodates, for example, the temperature breaker 4.

Referring to fig. 2 and 4, the first tab 2 and the second tab 3 extend from the second step surface, so that they are located at the same end of the battery cell 1 and are arranged side by side. After the temperature breaker 4 is assembled with the printed circuit board 5, the first electrode lug 2 and the second electrode lug 3 are connected with the assembled printed circuit board 5, so that the temperature breaker 4 is located at the same end of the battery core 1, and the temperature breaker 4 is located in an accommodating space between the first step surface and the second step surface, and the structural compactness of the battery is further improved.

In the embodiment of the present utility model, an insulating spacer 12 is disposed on the surface of the sealing step 11, and the insulating spacer 12 includes a first support arm 121 and a second support arm 122 that are perpendicular to each other; wherein,

the first support arm 121 is connected with the first step surface, the second support arm 122 is attached to the second step surface, and the temperature breaker 4 is disposed on a surface of the second support arm 122 away from the second step surface.

Referring to fig. 2 and 4, the surface of the sealing step 11 is provided with an insulating spacer 12, and the insulating spacer 12 includes a first arm 121 and a second arm 122 perpendicular to each other. One end of the first support arm 121 is fixedly connected with one end of the second support arm 122, and the insulating spacer 12 is integrally provided in an L shape.

The insulating gasket 12 is glued on both sides, one side surface of the insulating gasket 12 is glued to the first step surface and the second step surface of the sealing step 11 of the battery cell 1, specifically, the first support arm 121 of the insulating gasket 12 is glued and fixed to the first step surface, and the second support arm 122 is glued and fixed to the second step surface.

The other side surface of the insulating spacer 12 is bonded to the temperature breaker 4, specifically, the side of the second arm 122 away from the second step surface is bonded to the temperature breaker 4 to achieve sufficient positioning of the temperature breaker 4.

In the utility model, the temperature breaker 4 and the printed circuit board 5 are both positioned on one surface of the insulating gasket 12, which is away from the sealing step 11. The recoverable temperature breaker 4, the printed circuit board 5 and the battery cell 1 can be separated by an insulating spacer 12, so that short-circuiting is avoided. Meanwhile, the insulating gasket 12 can protect the battery cell 1 to avoid damage to the end face of the battery cell 1 in assembly and reliability test of the temperature circuit breaker 4. In addition, the second support arm 122 of the insulating spacer 12 is adhered to the temperature breaker 4, so that the temperature breaker 4 is fully positioned, and the connection stability of the temperature breaker 4 is improved.

In the embodiment of the present utility model, the temperature breaker 4 and the second arm 122 are adhered and fixed by a heat conducting adhesive.

By adding the heat-conducting glue between the temperature breaker 4 and the second support arm 122, the temperature of the battery cell 1 is ensured to be more directly transferred to the temperature sensor to truly reflect the temperature of the battery cell 1, and the sensitivity and the accuracy of the temperature breaker 4 are improved.

In the embodiment of the present utility model, the insulating spacer 12 is made of an elastic insulating material.

That is, the insulating spacer 12 is made of a flexible material with a buffering function, preferably a sponge gel or rubber pad with a thickness of 0.15-1 mm or other insulating material with a certain buffering function, so as to avoid damage to the end face of the battery cell 1 during assembly and reliability test of the temperature circuit breaker 4.

In the embodiment of the present utility model, at least one side edge of the battery cell 1 is provided with a side adhesive tape 13, and the side adhesive tape 13 is used for protecting the edge of the battery cell 1.

Preferably, the side gummed paper 13 is provided in a C-shape or L-shape.

Referring to fig. 4, the battery further includes two side gummed papers 13, and the two side gummed papers 13 are respectively wrapped on two sides of the battery cell 1.

The side gummed paper 13 can be L-shaped or C-shaped insulating adhesive tape so as to protect and fix the side of the battery, and simultaneously avoid the collapse of aluminum metal in the aluminum plastic film caused by electrochemical reaction of exposed metal of the section of the aluminum plastic film at the sealing part and the negative electrode of the battery cell 1 or the ground contact, thereby improving the safety performance of the battery.

The utility model also provides electronic equipment comprising the battery. The electronic device may be a mobile phone, a tablet computer, a notebook computer, etc.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. A connection device, comprising:

a temperature circuit breaker (4), the temperature circuit breaker (4) having a first connection (41) and a second connection (42);

a printed circuit board (5), wherein a first conductive member (51), a second conductive member (52) and a third conductive member (53) are arranged on the printed circuit board (5); wherein,

the first conductive piece (51) is used for being electrically connected with one tab of the battery cell (1), the second conductive piece (52) is electrically connected with the first connecting end (41), the third conductive piece (53) is electrically connected with the second connecting end (42), and the third conductive piece (53) is used for being electrically connected with the other tab of the battery cell.

2. The connection device according to claim 1, characterized in that the first conductive element (51) is arranged on a side of the second conductive element (52) facing away from the third conductive element (53); or,

the first conductive member (51) is arranged on one side of the third conductive member (53) away from the second conductive member (52).

3. The connection device according to claim 1, characterized in that the second connection end (42) is welded to the second conductive element (52).

4. A battery, characterized in that it comprises an electric core (1) and a connecting device according to any one of claims 1-3, one tab of the electric core (1) is electrically connected to the first conductive member (51), and the other tab of the electric core (1) is electrically connected to the third conductive member (53).

5. The battery according to claim 4, characterized in that the end of the cell (1) is provided with a sealing step (11), the sealing step (11) comprising a first step surface and a second step surface perpendicular to each other; wherein,

an accommodating space for accommodating the temperature circuit breaker (4) is formed between the first step surface and the second step surface, and the tab of the battery cell (1) extends out along the second step surface.

6. The battery according to claim 5, wherein the surface of the sealing step (11) is provided with an insulating gasket (12), and the insulating gasket (12) comprises a first support arm (121) and a second support arm (122) which are perpendicular to each other; wherein,

the first support arm (121) is connected with the first step surface, the second support arm (122) is attached to the second step surface, and the temperature breaker (4) is arranged on the surface, away from the second step surface, of the second support arm (122).

7. The battery according to claim 6, characterized in that the temperature breaker (4) and the second arm (122) are fixed by means of a thermally conductive adhesive.

8. The battery according to claim 7, characterized in that the insulating spacer (12) is made of an elastic insulating material.

9. The battery according to claim 4, characterized in that at least one side edge of the cell (1) is provided with a side glue (13), the side glue (13) being used for protecting the edge of the cell (1).

10. Battery according to claim 9, characterized in that the side gummed paper (13) is provided in a C-shape or L-shape.

11. An electronic device comprising a battery as claimed in any one of claims 4-10.