CN219644197U

CN219644197U - Battery protection board, lithium battery and electronic equipment

Info

Publication number: CN219644197U
Application number: CN202223403579.5U
Authority: CN
Inventors: 李同欣; 李武岐; 邱松武; 贺明; 陈坤钟; 肖时俊
Original assignee: Zhejiang Sunwoda Electronics Co Ltd
Current assignee: Zhejiang Sunwoda Electronics Co Ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-09-05
Anticipated expiration: 2032-12-16

Abstract

The utility model provides a battery protection board, a lithium battery and electronic equipment, wherein the battery protection board comprises: the main PCB is internally provided with a first copper sheet; the auxiliary PCB is overlapped with the main PCB, the surface of the main PCB is attached to the surface of the auxiliary PCB, a second copper sheet is arranged in the auxiliary PCB, the first copper sheet is connected with the second copper sheet, a plurality of components are arranged on the main PCB, and a plurality of avoiding parts which penetrate through the main PCB and avoid the components are arranged on the auxiliary PCB. By the technical scheme provided by the utility model, the problems that the battery protection board in the related technology occupies a large space and the space capacity of the battery core is reduced can be solved.

Description

Battery protection board, lithium battery and electronic equipment

Technical Field

The utility model relates to the technical field of electronic products, in particular to a battery protection plate, a lithium battery and electronic equipment.

Background

Electronic devices, such as cell phones or notebook computers, are provided with lithium batteries for supplying power. The lithium battery is also provided with a battery protection board, and the battery protection board mainly plays a role in protecting the charge and discharge of the lithium battery so as to prolong the service life of the lithium battery.

In the related art, in order to meet the endurance and fast charging performance of electronic products, the space utilization rate of lithium batteries needs to be continuously improved. In order to improve the quick charge performance of the lithium battery, reducing the occupied space of the battery protection plate becomes a necessary choice.

However, the battery protection board in the related art is a separately arranged PCB board, so that in order to improve the quick charge performance of the lithium battery, the copper-clad thickness of the PCB board can only be increased or the area of the PCB board can be increased, the space occupation rate of the battery protection board can be improved by adopting the two modes, and the space capacity of the battery core can be reduced.

Disclosure of Invention

The utility model provides a battery protection plate, a lithium battery and electronic equipment, which are used for solving the problems that the battery protection plate in the related art occupies a large space and the space capacity of a battery core is reduced.

According to an aspect of the present utility model, there is provided a battery protection plate including: the main PCB is internally provided with a first copper sheet; the auxiliary PCB is overlapped with the main PCB, the surface of the main PCB is attached to the surface of the auxiliary PCB, a second copper sheet is arranged in the auxiliary PCB, the first copper sheet is connected with the second copper sheet, a plurality of components are arranged on the main PCB, and a plurality of avoiding parts which penetrate through the main PCB and avoid the components are arranged on the auxiliary PCB.

Further, dodge the portion and include dodging the hole and dodging the groove, dodge the hole and keep away from the outside edge setting of vice PCB board, dodge the groove and extend to the outside edge of vice PCB board and run through the outside edge of vice PCB board.

Further, at least one component is arranged in the avoidance part in a penetrating way.

Further, the surface of the auxiliary PCB, which is far away from the main PCB, is not higher than the top end of the component.

Further, the size of the sub PCB is smaller than or equal to the size of the main PCB.

Further, the sub PCB is a rigid circuit board or a flexible circuit board.

Further, a plurality of first bonding pads connected with the first copper sheet are arranged on the main PCB, a plurality of second bonding pads connected with the second copper sheet are arranged on the auxiliary PCB, and the plurality of first bonding pads are connected with the plurality of second bonding pads in a one-to-one correspondence manner.

Further, the battery protection board includes two vice PCB boards, and the upper surface and the lower surface of main PCB board all are provided with a plurality of components and parts, and one of them pair PCB board laminating sets up the upper surface at main PCB board, and another pair PCB board laminating sets up the lower surface at main PCB board.

According to another aspect of the present utility model, there is provided a lithium battery including: a battery cell; the battery protection board is arranged on the battery core and connected with the battery core, and the battery protection board is provided by the battery protection board.

According to still another aspect of the present utility model, there is provided an electronic device including a lithium battery, the lithium battery being the lithium battery provided above.

By applying the technical scheme of the utility model, the battery protection board comprises a main PCB and a secondary PCB, the secondary PCB is overlapped with the main PCB, the surface of the main PCB is attached to the surface of the secondary PCB, a first copper sheet is arranged in the main PCB, a second copper sheet is arranged in the secondary PCB, the first copper sheet is electrically connected with the second copper sheet, and a plurality of avoidance parts which are arranged in a penetrating way are arranged on the secondary PCB so as to avoid a plurality of components on the main PCB. Through setting up vice PCB board, utilize the second copper skin of vice PCB board can promote the through-flow ability of main PCB board, and then promote battery protection board's quick charge performance. Compared with the method for increasing the thickness of the first copper sheet of the main PCB or prolonging the size of the main PCB, the avoidance part of the auxiliary PCB is adopted to avoid components on the main PCB, so that the thickness of the battery protection plate cannot be increased, the space occupation rate of the battery protection plate cannot be increased, and the setting space of the battery cell is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and 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 utility model. In the drawings:

fig. 1 illustrates a schematic structure of a battery protection plate provided according to an embodiment of the present utility model;

fig. 2 illustrates still another structural schematic view of a battery protection plate provided according to an embodiment of the present utility model;

fig. 3 illustrates an exploded view of a battery protection plate provided according to an embodiment of the present utility model;

fig. 4 shows a schematic structural view of the sub PCB board of fig. 1.

Wherein the above figures include the following reference numerals:

10. a main PCB board; 11. a component;

20. a sub PCB board; 21. an avoidance unit; 211. avoidance holes; 212. avoiding the groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 4, the embodiment of the utility model provides a battery protection board, which comprises a main PCB 10 and a secondary PCB 20, wherein a first copper sheet is arranged in the main PCB 10, the secondary PCB 20 is overlapped with the main PCB 10, the surface of the main PCB is attached to the surface of the secondary PCB 20, a second copper sheet is arranged in the secondary PCB 20, the first copper sheet is connected with the second copper sheet, a plurality of components 11 are arranged on the main PCB 10, and a plurality of avoidance parts 21 which are arranged in a penetrating way and avoid the plurality of components 11 are arranged on the secondary PCB 20.

By applying the technical scheme of the utility model, the battery protection board comprises a main PCB 10 and a secondary PCB 20, the secondary PCB 20 is overlapped with the main PCB 10, the surface of the main PCB 10 is attached to the surface of the secondary PCB 20, a first copper sheet is arranged in the main PCB 10, a second copper sheet is arranged in the secondary PCB 20, the first copper sheet is electrically connected with the second copper sheet, and a plurality of through-arranged avoiding parts 21 are arranged on the secondary PCB 20 so as to avoid a plurality of components 11 on the main PCB 10. Through setting up vice PCB board 20, utilize the second copper skin of vice PCB board 20 can promote the through-flow ability of main PCB board 10, and then promote battery protection board's quick charge performance. Compared with the method for increasing the thickness of the first copper sheet of the main PCB 10 or prolonging the size of the main PCB 10, the avoidance part 21 of the auxiliary PCB 20 is adopted to avoid the components 11 on the main PCB 10, so that the thickness of the battery protection plate cannot be increased, the space occupation rate of the battery protection plate cannot be increased, and the setting space of the battery cell is improved.

Wherein, the sub PCB 20 is overlapped with the main PCB 10, which means that the main PCB 10 and the sub PCB 20 are arranged up and down in a spatial position relationship, and the surface of the main PCB 10 and the surface of the sub PCB 20 are attached.

In this embodiment, the components on the main PCB board include an IC chip, a capacitor, a resistor, and the like.

It should be noted that, due to the manner of stacking and attaching the main PCB 10 and the sub PCB 20, the copper thickness of the battery protection board can be increased, so as to improve the current passing capability, and meanwhile, the internal resistance of the battery protection board can be reduced, and the temperature rise of the battery protection board can be reduced by utilizing the copper heat conduction capability.

Specifically, the external dimensions of the sub PCB 20 are set according to the external dimensions of the main PCB 10.

As shown in fig. 1 and 4, the avoidance portion 21 includes an avoidance hole 211 and an avoidance groove 212, the avoidance hole 211 is far away from the outer edge of the sub PCB 20, and the avoidance groove 212 extends to the outer edge of the sub PCB 20 and penetrates through the outer edge of the sub PCB 20. By adopting the avoidance part 21 with the structure, the avoidance hole 211 can be utilized to avoid the component 11 in the middle of the main PCB, and the avoidance groove 212 is utilized to avoid the component 11 in the side of the main PCB, so that the advantage of being convenient for processing the plate of the auxiliary PCB 20 is realized.

Wherein, dodge the hole 211 and keep away from the outward flange setting of vice PCB board 20, dodge the hole 211 setting and just not run through the outward flange of vice PCB board 20 in the main part of vice PCB board 20 promptly.

As shown in fig. 1 and 2, at least one component 11 is inserted into the escape portion 21. The avoidance part 21 with the structure ensures that the area of the second copper sheet is large enough when avoiding the component 11, thereby improving the through-flow capacity of the battery protection plate and being beneficial to the processing of the plate.

Specifically, the avoidance portion 21 of the sub PCB 20 is set according to the specific distribution of the components 11 on the main PCB 10.

In this embodiment, the surface of the sub PCB 20 far from the main PCB 10 is not higher than the top end of the component 11. By adopting the structure, the thickness of the battery protection board can not be influenced by the auxiliary PCB 20, and the space utilization rate of the battery protection board can not be increased while the through-flow capacity is improved.

As shown in fig. 1, the size of the sub PCB 20 is smaller than or equal to the size of the main PCB 10. By adopting the size, the length of the battery protection board can not be influenced by the auxiliary PCB 20, and the space utilization rate of the battery protection board can not be increased while the through-flow capacity is improved.

Note that, the sub PCB 20 may be a rigid circuit board or a flexible circuit board.

Specifically, a plurality of first bonding pads connected with the first copper sheet are arranged on the main PCB 10, a plurality of second bonding pads connected with the second copper sheet are arranged on the auxiliary PCB, and the plurality of first bonding pads are connected with the plurality of second bonding pads in a one-to-one correspondence manner. The mode that the primary PCB and the secondary PCB are connected by the first bonding pad and the second bonding pad has the advantage of being convenient to set.

It should be noted that, the first bonding pad and the second bonding pad may be formed by hot press welding, reflow welding or laser welding.

As shown in fig. 1, the battery protection board includes two sub-PCBs 20, and the upper surface and the lower surface of the main PCB 10 are both provided with a plurality of components 11, wherein one sub-PCB 20 is attached to the upper surface of the main PCB, and the other sub-PCB 20 is attached to the lower surface of the main PCB. By adopting the two auxiliary PCBs 20, the through-flow capacity of the main PCB 10 can be further improved, and the thickness of the battery protection plate can not be influenced, so that the performance of the battery protection plate is further improved.

Adopt prior art's battery protection shield, main PCB board is 8 plywood, and its thickness is 1.2mm, and the both sides of main PCB board all are provided with components and parts 11, and the maximum height of components and parts 11 is 1mm, and battery protection shield's thickness is 3.2mm. By adopting the scheme of the utility model, the auxiliary PCB can be arranged on the upper surface and the lower surface of the main PCB 10, and at the moment, the main PCB is only required to be arranged into 4 layers, the thickness of the main PCB is 0.6mm, so that the battery protection board has the same performance as the battery protection board in the prior art. At this time, the thickness of the battery protection plate was only 2.6mm.

In another embodiment of the present utility model, a lithium battery is provided, where the lithium battery includes a battery core and a battery protection board, and the battery protection board is disposed on the battery core and connected to the battery core, and the battery protection board is the battery protection board provided above. By adopting the lithium battery, through the arrangement of the auxiliary PCB 20, the through-flow capacity of the main PCB 10 can be improved by utilizing the second copper sheet of the auxiliary PCB 20, and then the quick charge performance of the battery protection board is improved. Compared with the method for increasing the thickness of the first copper sheet of the main PCB 10 or prolonging the size of the main PCB 10, the avoidance part 21 of the auxiliary PCB 20 is adopted to avoid the components 11 on the main PCB 10, so that the thickness of the battery protection plate cannot be increased, the space occupation rate of the battery protection plate cannot be increased, the setting space of the battery core is increased, and the energy density of the lithium battery is further improved.

In another embodiment of the present utility model, an electronic device is provided, where the electronic device includes a lithium battery, and the lithium battery is a lithium battery provided above. By adopting the electronic equipment, through the arrangement of the auxiliary PCB 20, the through-flow capacity of the main PCB 10 can be improved by utilizing the second copper sheet of the auxiliary PCB 20, and then the quick charge performance of the battery protection board is improved. Compared with the method for increasing the thickness of the first copper sheet of the main PCB 10 or prolonging the size of the main PCB 10, the avoidance part 21 of the auxiliary PCB 20 is adopted to avoid the components 11 on the main PCB 10, so that the thickness of the battery protection plate cannot be increased, the space occupation rate of the battery protection plate cannot be increased, and the setting space of the battery cell is improved. The electronic equipment quick charging performance is improved, and meanwhile, the cruising ability of the electronic equipment is improved.

The electronic equipment comprises common electronic products such as mobile phones, tablet computers, notebook computers and the like.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

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. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. 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 the 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.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A battery protection plate, characterized in that the battery protection plate comprises:

the PCB comprises a main PCB (10), wherein a first copper sheet is arranged in the main PCB (10);

the auxiliary PCB (20) is overlapped with the main PCB (10), the surface of the main PCB is attached to the surface of the auxiliary PCB (20), a second copper sheet is arranged in the auxiliary PCB (20), the first copper sheet is connected with the second copper sheet, a plurality of components (11) are arranged on the main PCB (10), and a plurality of avoidance parts (21) which penetrate through the main PCB (20) and avoid the components (11) are arranged on the auxiliary PCB (20).

2. The battery protection plate according to claim 1, wherein the avoidance portion (21) includes an avoidance hole (211) and an avoidance groove (212), the avoidance hole (211) is disposed away from an outer edge of the sub-PCB (20), and the avoidance groove (212) extends to the outer edge of the sub-PCB (20) and penetrates the outer edge of the sub-PCB (20).

3. The battery protection plate according to claim 1, wherein at least one of the components (11) is provided in the escape portion (21) in a penetrating manner.

4. The battery protection plate according to claim 1, characterized in that the surface of the secondary PCB board (20) remote from the primary PCB board (10) is not higher than the top end of the component (11).

5. The battery protection plate according to claim 1, characterized in that the size of the secondary PCB board (20) is smaller than or equal to the size of the primary PCB board (10).

6. The battery protection board according to claim 1, wherein the sub PCB board (20) is a rigid circuit board or a flexible circuit board.

7. The battery protection board according to claim 1, wherein a plurality of first bonding pads connected with the first copper sheet are arranged on the main PCB board (10), a plurality of second bonding pads connected with the second copper sheet are arranged on the auxiliary PCB board, and the plurality of first bonding pads and the plurality of second bonding pads are connected in one-to-one correspondence.

8. The battery protection plate according to claim 1, wherein the battery protection plate comprises two auxiliary PCB boards (20), wherein a plurality of components (11) are respectively arranged on the upper surface and the lower surface of the main PCB board (10), one auxiliary PCB board (20) is attached to the upper surface of the main PCB board, and the other auxiliary PCB board (20) is attached to the lower surface of the main PCB board.

9. A lithium battery, the lithium battery comprising:

a battery cell;

a battery protection plate provided on and connected to the battery cell, the battery protection plate being as set forth in any one of claims 1 to 8.

10. An electronic device comprising a lithium battery, wherein the lithium battery is the lithium battery of claim 9.