CN221283395U - Battery protection board and battery - Google Patents

Abstract

The application discloses a battery protection plate and a battery, and belongs to the technical field of batteries, wherein the battery protection plate is provided with a first direction and a second direction which are intersected, the battery protection plate comprises a first plate body, and the first plate body is provided with a first mounting surface; the second plate body is arranged opposite to the first plate body in the first direction, is connected with the first plate body and is provided with a second mounting surface; the third plate body is connected with the first plate body and extends away from the second plate body in the first direction, and the third plate body is provided with a third mounting surface in the second direction; the elements are arranged on at least one of the first mounting surface, the second mounting surface and the third mounting surface. The application increases the mounting layout range and the heat dissipation area of the element, and is beneficial to improving the heat dissipation effect of the battery protection plate.

Description

Battery protection board and battery

Technical Field

The application belongs to the technical field of batteries, and particularly relates to a battery protection plate and a battery.

Background

At present, with the development of battery technology, such as a battery applied to electronic devices such as mobile phones, the volume tends to be reduced, the energy density tends to be increased, the charging efficiency tends to be improved, and accordingly, the charge and discharge heat productivity of the battery tends to be inevitably improved.

The battery protection board is a core protection component for preventing the problems of overcharge, overdischarge, overcurrent, short circuit, ultra-high temperature charge and discharge and the like of the battery, is generally directly installed at the end part of the battery, and the installation space of the battery in the electronic equipment is limited, and the battery protection board needs to integrate more elements, so that higher requirements are put forward on the heat dissipation of the battery protection board.

Disclosure of utility model

The utility model aims to: the embodiment of the utility model provides a battery protection board, which aims to solve the technical problems; another object of the present utility model is to provide a battery using the above battery protection plate.

The technical scheme is as follows: the embodiment of the application provides a battery protection board, which has a first direction and a second direction which are intersected, and comprises:

The first plate body is provided with a first mounting surface;

The second plate body and the first plate body are oppositely arranged in the first direction, the second plate body is connected with the first plate body, and the second plate body is provided with a second mounting surface;

A third plate body connected to the first plate body and extending away from the second plate body in the first direction (X), the third plate body having a third mounting surface in the second direction;

The elements are arranged on at least one of the first mounting surface, the second mounting surface and the third mounting surface.

In some embodiments, at least one of two sides of the first board body in the first direction is the first mounting face;

At least one of two side surfaces of the second plate body in the first direction is the second mounting surface.

In some embodiments, the first mounting face is located on a side of the first plate facing away from the second plate;

And/or the second mounting surface is positioned on one side of the second plate body, which is away from the first plate body.

In some embodiments, the second mounting surface is provided with a tab connection portion, and the tab connection portion is provided with a connection groove, and the connection groove is used for plugging the tab of the battery.

In some embodiments, the first plate body has corresponding first and second ends in the second direction;

The battery protection plate further comprises a first bridge part and a second bridge part, and the first end is connected with the second plate body through the first bridge part;

The third plate body is arranged at the second end and is connected with the second end through the second bridge part.

In some embodiments, a gap is formed between the first plate body and the second plate body, and the first bridge portion is provided with a yielding hole, and the yielding hole is communicated with the gap.

Correspondingly, the battery according to the embodiment of the application comprises the battery protection board, and the battery further comprises:

The battery cell body, the battery cell body is in the second direction has the tab and draws forth the end, the third plate body in the second direction have with the fixed surface that the third is pasted the face and is carried on the back of the body, the third plate body through the fixed surface set up in the tab draws forth the end, the tab draws forth the end and draws forth the tab, tab electric connection battery protection shield.

In some embodiments, the tab leading-out end has a top seal portion, the tab penetrates through the top seal portion in the second direction, and the first plate body and the second plate body are oppositely disposed on two sides of the top seal portion in the first direction.

In some embodiments, the tab cover is provided with an insulation portion to insulate opposite sides of the first and second plates.

In some embodiments, in the first direction, a maximum dimension of the cell body is greater than or equal to a maximum dimension of the battery protection plate.

Correspondingly, the battery according to the embodiment of the application comprises the battery protection plate.

The beneficial effects are that: the battery protection board comprises a first board body, a second board body, a third board body and a plurality of elements, wherein the first board body is provided with a first mounting surface, the second board body is provided with a second mounting surface, the third board body is provided with a third mounting surface in a second direction, the second board body and the first board body are oppositely arranged in the first direction, the second board body is connected with the first board body, the third board body is connected with the first board body and extends away from the second board body in the second direction, and the elements are arranged on at least one of the first mounting surface, the second mounting surface and the third mounting surface. The first mounting surface, the second mounting surface and the third mounting surface are used for enlarging the mounting layout range and the heat dissipation area of the element, so that the heat dissipation effect of the battery protection plate is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view showing the structure of a battery protection plate according to an embodiment of the present application;

fig. 2 is a schematic view showing a structure of a battery protection plate according to another embodiment of the present application at another view angle;

fig. 3 is a schematic view showing a structure of a battery protection plate according to another embodiment of the present application at another view angle;

fig. 4 is a schematic view of the structure of a battery according to an embodiment of the present application;

Fig. 5 is a schematic view of an exploded structure of a battery according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram of an unpackaged gummed paper for a battery cell body and a battery protection board according to an embodiment of the present application;

FIG. 7 is a schematic view of a battery cell body and a battery protection plate according to another embodiment of the present application;

FIG. 8 is a schematic cross-sectional view taken along line A-A of FIG. 7;

FIG. 9 is a partially enlarged schematic illustration of portion B of FIG. 8;

Reference numerals: 1. a battery protection plate; 10. a first plate body; 100. a first mounting surface; 101. a first end; 102. a second end; 11. a second plate body; 110. a second mounting surface; 111. a third end; 112. a fourth end; 12. a third plate body; 120. a third mounting surface; 121. a fixing surface; 122. a fifth end; 123. a sixth end; 13. an element; 14. a tab connection part; 140. a connecting groove; 15. a first bridge portion; 150. a relief hole; 16. a second bridge portion; 17. a gap; 18. a flexible circuit board; 19. coating board gummed paper; 2. a cell body; 20. a tab lead-out end; 21. a tab; 22. a top seal; 23. an insulating part; 3. peripheral gummed paper; 4. top sealing gummed paper; 5. foam gummed paper; 6. side gummed paper; 7. a lifting handle; 8. tail gummed paper; 9. the adhesive tape is easy to tear; x, a first direction; y, second direction; z, third direction.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

In the description of the present application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "plurality" means two or more, and at least one means one, two or more, unless explicitly defined otherwise.

The applicant notes that, at present, batteries applied to electronic devices such as mobile phones tend to reduce the volume, increase the energy density, increase the charging efficiency, and the like, with the consequent inevitable increase in the heat productivity of charging and discharging the batteries. The battery protection board is used as a core protection component for preventing the problems of overcharge, overdischarge, overcurrent, short circuit, ultra-high temperature charge and discharge and the like of the battery, is generally directly installed at the end part of the battery, the installation space of the battery in electronic equipment is limited, the element mounting surface on the battery protection board generally needs to occupy the space in the length direction of the battery, certain influence exists on the whole size of the battery, and meanwhile, the battery protection board needs to integrate more elements, so that higher requirements are provided for heat dissipation of the battery protection board.

In view of the above, an embodiment of the present application discloses a battery protection plate, which can solve at least one of the above-mentioned drawbacks.

Referring to fig. 1 to 3, the battery protection plate 1 has a first direction X, a second direction Y and a third direction Z intersecting with each other, the battery protection plate 1 includes a first plate body 10, a second plate body 11, a third plate body 12 and a plurality of elements 13, wherein the first plate body 10 has a first mounting surface 100, the second plate body 11 and the first plate body 10 are oppositely disposed in the first direction X, the second plate body 11 has a second mounting surface 110, the second plate body 11 is connected to the first plate body 10, the third plate body 12 is connected to the first plate body 10 and extends away from the second plate body 11 in the first direction X, the third plate body 12 has a third mounting surface 120 oppositely disposed in the second direction Y, and the elements 13 are disposed on at least one of the first mounting surface 100, the second mounting surface 110 and the third mounting surface 120.

In this embodiment, the first board 10, the second board 11 and the third board 12 are all printed circuit boards, the component 13 is a component mounted on the printed circuit boards, and the first mounting surface 100, the second mounting surface 110 and the third mounting surface 120 increase the mounting layout range and the heat dissipation area of the component 13, thereby facilitating heat dissipation of the battery protection board 1. In this embodiment, the first direction X, the second direction Y, and the third direction Z may intersect vertically in pairs, and each pair of the first direction X, the second direction Y, and the third direction Z is 90 ° ± 10 ° in a vertical range.

In this embodiment, the third plate 12 may be connected to the side surface of the first plate 10 facing away from the second plate 11, or may be connected below the first plate 10, and in this embodiment, the third plate 12 is connected below the first plate 10.

Specifically, in some embodiments, referring to fig. 1 and 2, at least one of two sides of the first board 10 in the first direction X is a first mounting surface 100, and at least one of two sides of the second board 11 in the first direction X is a second mounting surface 110.

It can be appreciated that the first mounting surface 100 and the second mounting surface 110 are distributed in the first direction X, and the third mounting surface 120 is distributed in the second direction Y, so that the mounting space of the battery can be fully utilized, and the components 13 can be disposed on the first mounting surface 100, the second mounting surface 110 and the third mounting surface 120 in a dispersed manner, i.e. the dimensions of the first board 10 and the second board 11 can be reduced in the second direction Y in the embodiment, so as to increase the mountable dimension of the battery in the second direction Y, and thus the energy density of the battery can be increased, compared with the mounting surface disposed only in the first direction X or the mounting surface disposed in the second direction Y.

Further, in some embodiments, referring to fig. 1 and 3, the first mounting surface 100 is located on a side of the first board 10 facing away from the second board 11, and the second mounting surface 110 is located on a side of the second board 11 facing away from the first board 10. I.e. the first mounting surface 100 and the second mounting surface 110 are away from each other, so as to avoid that the corresponding elements 13 are oppositely arranged between the first board body 10 and the second board body 11, and improve the heat dissipation effect of the elements 13 on the first board body 10 and the second board body 11.

It should be understood that, in other embodiments, the first mounting surface 100 may also face the second board 11, and the second mounting surface 110 may also face the first board 10, which is not limited herein.

Referring to fig. 1 and 3, the first direction X is parallel to the thickness directions of the first plate 10 and the second plate 11 in the present embodiment, the second direction Y is parallel to the width directions of the first plate 10 and the second plate 11 in the present embodiment, and is parallel to the thickness direction of the third plate 12, and the third direction Z is parallel to the length directions of the first plate 10, the second plate 11, and the third plate 12 in the present embodiment.

In some embodiments, referring to fig. 2 and 3, the second mounting surface 110 is provided with a tab connection portion 14, a connection groove 140 into which the tab 21 of the battery is inserted and connected is formed at the top of the tab connection portion 14 along the second direction Y, and the connection groove 140 penetrates through both ends of the tab connection portion 14 along the third direction Z.

Furthermore, in some embodiments, referring to fig. 1 to 3, the first plate body 10 has corresponding first and second ends 101 and 102 in the second direction Y, the second plate body 11 also has third and fourth ends 111 and 112 disposed opposite to each other in the second direction Y, the battery protection plate 1 further includes a first bridge portion 15 and a second bridge portion 16, the first bridge portion 15 is located between the first and second ends 101 and 111, and the first end 101 is connected to the third end 111 through the first bridge portion 15;

The third plate 12 has a fifth end 122 and a sixth end 123 corresponding in the first direction X, the fifth end 122 being abutted against the second end 102, while the fifth end 122 is connected to the second end 102 by the second bridge 16. It should be noted that, the first bridge portion 15 and the second bridge portion 16, that is, the electrical connection between the circuit boards, ensure the electrical conduction of the first board 10, the second board 11 and the third board 12.

In some embodiments, referring to fig. 1 to 3, a gap 17 is provided between the first plate body 10 and the second plate body 11, and the first bridge portion 15 is provided with a relief hole 150, where the relief hole 150 communicates with the gap 17. The first plate body 10 and the second plate body 11 may be respectively disposed at two sides of the battery tab 21 in the first direction X, and the hole 150 is configured to allow the battery tab 21 to pass through and be inserted into the connection slot 140. The relief holes 150 provide a positioning function when the battery and the battery protection plate 1 are assembled, and the gaps 17 of the first plate body 10 and the second plate body 11 avoid the influence of the adhesion of the two to the mutual heat dissipation effect.

In addition, referring to fig. 1 to 3, the battery protection board 1 further includes a flexible circuit board 18, and in this embodiment, the flexible circuit board 18 is connected to the first mounting surface 100, and the flexible circuit board 18 is used for connecting the battery protection board 1 to electrically connect to a main circuit board of an electronic device, so as to realize mutual circuit conduction.

Correspondingly, referring to fig. 4 to 9, a battery according to an embodiment of the present application includes the battery protection board 1, the battery further includes a battery core body 2, the battery core body 2 has a tab leading-out end 20 in the second direction Y, the third board 12 is connected to the tab leading-out end 20 through a fixing surface 121, the tab leading-out end 20 is led out with a tab 21, and the tab 21 is electrically connected to the battery protection board 1.

In this embodiment, the first direction X is parallel to the thickness direction of the battery, the second direction Y is parallel to the length direction of the battery, and the third direction Z is parallel to the width direction of the battery.

In some embodiments, referring to fig. 5 and 6, the tab lead-out end 20 has a top seal 22, the tab 21 penetrates the top seal 22 in the second direction Y, and the first plate body 10 and the second plate body 11 are disposed opposite to each other on both sides of the top seal 22 in the first direction X. That is, the gap 17 between the first plate body 10 and the second plate body 11 is engaged with the top seal 22, and the first plate body 10, the second plate body 11 and the top seal 22 are stably connected. It should be noted that, the top sealing portion 22 is a structure formed by the pole piece inside the battery core body 2 in the process of leading out the tab 21, and the top sealing portion 22 in this embodiment is sealed, which is not described herein again.

In some embodiments, referring to fig. 8 and 9, the tab 21 is bent toward the second mounting surface 110 after being extended from the abdication hole 150, so as to be inserted into the connection groove 140 to electrically connect the tab connection portion 14. In this embodiment, two tabs 21 are led out from the battery cell body 2, that is, the positive tab 21 and the negative tab 21 distributed in the third direction Z, and two corresponding tab connection portions 14 are similarly provided. The provision of the relief holes 150 facilitates the tab 21 to extend out of the gap 17 and connect to the second mounting surface 110, thereby avoiding mounting in the gap 17 and improving the heat dissipation effect at the tab 21.

In addition, in some embodiments, the tab 21 is sleeved with an insulation portion 23, and the insulation portion 23 is opposite to the first plate body 10 and the second plate body 11, so that the tab 21 is spaced from the first plate body 10 and the second plate body 11 to achieve an insulation effect. After the battery protection plate 1 is connected with a battery, the insulation part 23 can be abutted against the first bridge part 15 at the same time, and the tab 21 and the first bridge part 15 can be spaced to achieve the insulation effect of the two.

In some embodiments, referring to fig. 3 and 8, in the first direction X, the maximum dimension D of the cell body 2 is greater than or equal to the maximum dimension D of the battery protection plate 1. The maximum dimension D of the battery cell body 2 can be understood as the thickness of the battery cell body 2 in this embodiment, and the maximum dimension D of the battery protection plate 1 can be understood as the dimension occupied by the battery protection plate 1 in the thickness direction of the battery cell body 2, that is, the occupied space range of the battery protection plate 1 in this embodiment does not exceed two sides of the thickness direction of the battery cell body 2, so as to avoid the limitation on the battery size caused by excessive occupation of the battery installation space.

In addition, referring to fig. 3, 4 and 5, in this embodiment, a protection structure such as a multi-layer packaging adhesive paper is further provided between the battery protection board 1 and the battery core body 2 during the assembly process, for example, the top sealing portion 22 is provided with the top sealing adhesive paper 4, which is spaced between the first board body 10, the second board body 11 and the top sealing portion 22; still be equipped with bubble cotton gummed paper 5 between fixed surface 121 and the utmost point ear leading-out terminal 20 in order to connect steadily, avoid battery protection board 1 direct contact electric core body 2 even puncture electric core body 2, still cover the package board gummed paper 19 to battery protection board 1 outside and establish peripheral gummed paper 3 at package board gummed paper 19 outer side wall to insulating battery protection board 1. In addition, to the both sides of electric core body 2 width direction still attached side gummed paper 6, to the bottom of electric core body 2 still cladding afterbody gummed paper 8, finally, set up and easily tear subsides 9 and be convenient for tear and easily tear the handle 7 of subsides 9 to the outside of electric core body 2. It should be understood that the package structure of the battery cell body 2 and the battery protection plate 1 is not limited only.

The above description of the battery protection board and the battery provided by the embodiment of the application is detailed, and specific examples are applied to explain the principle and the implementation of the application, and the description of the above embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (10)

1. A battery protection plate (1), characterized in that the battery protection plate (1) has a first direction (X) and a second direction (Y) intersecting, the battery protection plate (1) comprising:

a first plate body (10), the first plate body (10) having a first mounting surface (100);

The second plate body (11), the second plate body (11) and the first plate body (10) are oppositely arranged in the first direction (X), the second plate body (11) is connected with the first plate body (10), and the second plate body (11) is provided with a second mounting surface (110);

A third plate body (12), the third plate body (12) being connected to the first plate body (10) and extending away from the second plate body (11) in the first direction (X), the third plate body (12) having a third mounting surface (120) in the second direction (Y);

A plurality of elements (13), the elements (13) being provided to at least one of the first mounting face (100), the second mounting face (110) and the third mounting face (120).

2. The battery protection plate (1) according to claim 1, characterized in that,

At least one of two side surfaces of the first plate body (10) in the first direction (X) is the first mounting surface (100);

At least one of two side surfaces of the second plate body (11) in the first direction (X) is the second mounting surface (110).

3. The battery protection plate (1) according to claim 2, characterized in that,

The first mounting surface (100) is positioned on one side of the first plate body (10) away from the second plate body (11);

And/or the second mounting surface (110) is positioned on one side of the second plate body (11) away from the first plate body (10).

4. The battery protection plate (1) according to any one of claims 1 to 3, wherein,

The second mounting surface (110) is provided with a tab connecting part (14), the tab connecting part (14) is provided with a connecting groove (140), and the connecting groove (140) is used for plugging the tab of the battery.

5. The battery protection plate (1) according to claim 4, characterized in that,

The first plate body (10) has a first end (101) and a second end (102) corresponding in the second direction (Y);

The battery protection board (1) further comprises a first bridge part (15) and a second bridge part (16), and the first end (101) is connected with the second board body (11) through the first bridge part (15);

The third plate body (12) is arranged at the second end (102), and the third plate body (12) is connected with the second end (102) through the second bridge part (16).

6. The battery protection plate (1) according to claim 5, characterized in that,

A gap (17) is formed between the first plate body (10) and the second plate body (11), a yielding hole (150) is formed in the first bridge portion (15), and the yielding hole (150) is communicated with the gap (17).

7. A battery, characterized by comprising a battery protection plate (1) according to any one of claims 1 to 6, the battery further comprising:

The battery cell comprises a battery cell body (2), wherein the battery cell body (2) is provided with a tab leading-out end (20) in the second direction (Y), a third plate body (12) is provided with a fixing surface (121) opposite to the third mounting surface (120) in the second direction (Y), the third plate body (12) is arranged at the tab leading-out end (20) through the fixing surface (121), the tab leading-out end (20) is led out with a tab (21), and the tab (21) is electrically connected with the battery protection plate (1).

8. The battery of claim 7, wherein the battery is configured to provide the battery with a battery cell,

The tab leading-out end (20) is provided with a top sealing part (22), the tab (21) penetrates through the top sealing part (22) in the second direction (Y), and the first plate body (10) and the second plate body (11) are oppositely arranged on two sides of the top sealing part (22) in the first direction (X).

9. The battery of claim 8, wherein the battery is configured to provide the battery with a battery cell,

The tab (21) is sleeved with an insulating part (23) so as to be insulated from the opposite surfaces of the first plate body (10) and the second plate body (11).

10. The battery of claim 7, wherein the battery is configured to provide the battery with a battery cell,

In the first direction (X), the maximum dimension (D) of the battery cell body (2) is greater than or equal to the maximum dimension (D) of the battery protection plate (1).