Battery protection board and battery
By adopting a double-layer circuit board structure and a method of embedding components with avoiding grooves, the problem of fragile structural strength of the battery protection board element is solved, and effective protection of components and space savings are achieved.
Patent Information
- Application Number
- CN202420425037.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-05
AI Technical Summary
The precision components of existing battery protection plates have relatively fragile structural strength and are difficult to withstand mechanical stresses such as collisions, bends, and falls. Additional shells or plastic seals are needed to protect them, occupying space.
A double-layer circuit board structure is adopted, and a protective area is formed between the first circuit board and the second circuit board, and the components are placed in the protective area, isolated from the outside world, increasing the flow capacity, and embedding components through avoiding grooves to improve the protection effect.
Effective protection of precision components is achieved, avoiding the need for additional housing protection, reducing space occupation and manufacturing costs, and improving the overall flow capacity.
Smart Images
Figure CN222581228U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, in particular to a battery protection plate and a battery. Background Art
[0002] The battery protection board is a protective circuit board, mainly composed of electronic circuits. It accurately monitors the voltage of the battery cell and the current of the charging and discharging circuit at all times in an environment of -40℃ to +85℃, and controls the on and off of the current circuit in a timely manner.
[0003] At present, the battery protection board is an important component of mobile phone batteries. The electronic components on it are densely distributed, but the structural strength of the precision components is relatively fragile and cannot withstand mechanical stress such as collision, bending, and falling. Additional casing or plastic sealing is needed for protection, which takes up space. Utility Model Content
[0004] In view of this, the utility model provides a battery protection plate and a battery to solve the problem that the structural strength of existing precision components is relatively fragile and difficult to withstand mechanical stress such as collision, bending, and falling, and an additional shell or plastic packaging is needed for protection, which takes up space.
[0005] In the first aspect, the utility model provides a battery protection board, comprising a first circuit board, a second circuit board and components. The second circuit board is stacked on the first circuit board, the second circuit board is electrically connected to the first circuit board, and a protection area is formed between the second circuit board and the first circuit board; the components are arranged in the protection area, and the components are electrically connected to the first circuit board or the second circuit board.
[0006] In an optional implementation, a first avoidance groove is formed on a side of the first circuit board facing the second circuit board, and components are embedded in the first avoidance groove.
[0007] In an optional implementation, a second avoidance groove is formed on a side of the second circuit board facing the first circuit board, and components are embedded in the second avoidance groove.
[0008] In an optional embodiment, a first avoidance groove and a second avoidance groove are respectively provided on opposite sides of the first circuit board and the second circuit board, the first avoidance groove and the second avoidance groove are arranged correspondingly, the first avoidance groove and the second avoidance groove constitute a storage cavity, and the components are arranged in the storage cavity.
[0009] In an optional embodiment, a plurality of first avoidance grooves are arranged at intervals along the length direction of the first circuit board, and a plurality of components are provided, and the plurality of components are arranged in the plurality of first avoidance grooves in a one-to-one correspondence.
[0010] In an optional implementation, the heights of the plurality of components are different, the depths of the plurality of first avoidance grooves are different, and the height of each component is equal to the depth of its corresponding first avoidance groove.
[0011] In an optional implementation, the thickness of the first circuit board is 0.5 mm-1.6 mm, and the maximum depth of the first avoidance groove is 0.4 mm.
[0012] In an optional implementation, the first circuit board is attached to the surface of the second circuit board, and the distance between the edge of the second circuit board and the edge of the first circuit board is less than or equal to 0.3 mm.
[0013] In an optional embodiment, a flexible circuit board is further included, one end of the flexible circuit board is attached to the second circuit board, and the flexible circuit board is electrically connected to the second circuit board.
[0014] In a second aspect, the utility model further provides a battery, comprising a battery cell and the battery protection board in the first aspect, wherein the battery cell is electrically connected to the battery protection board.
[0015] Beneficial effects:
[0016] The battery protection board of the first aspect forms a double-layer circuit board structure through the first circuit board and the second circuit board, and a protection area is formed between the two. The components are placed in the protection area and isolated from the outside world, which has a better protection effect and does not require additional shell protection, thereby reducing space occupancy and manufacturing costs.
[0017] In addition, the battery of the second aspect includes the battery protection board of the first aspect, so the battery of the second aspect has all the beneficial effects of the battery protection board of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 An exploded view of the battery protection board according to an embodiment of the utility model;
[0020] Figure 2 A side cross-sectional view of a battery protection plate according to an embodiment of the utility model;
[0021] Figure 3 A top view of the first circuit board and the second circuit board according to an embodiment of the utility model;
[0022] Figure 4 It is a side view of the first circuit board described in the embodiment of the utility model.
[0023] Description of reference numerals:
[0024] 100. Battery protection board;
[0025] 110, first circuit board; 120, second circuit board; 130, components; 140, flexible circuit board;
[0026] 111. The first avoidance groove. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0028] In order to deepen the understanding of the solution of the utility model, it is necessary to elaborate on the technical problems in detail in combination with relevant technologies. The specific contents are as follows:
[0029] The battery protection board is a protective circuit board, mainly composed of electronic circuits. It accurately monitors the voltage of the battery cell and the current of the charging and discharging circuit at all times in an environment of -40℃ to +85℃, and controls the on and off of the current circuit in a timely manner.
[0030] At present, the battery protection board is an important component of mobile phone batteries. The electronic components on it are densely distributed, but the structural strength of the precision components is relatively fragile and cannot withstand mechanical stress such as collision, bending, and falling. Additional casing or plastic sealing is needed for protection, which takes up space.
[0031] In order to solve the above technical problems, the utility model provides a battery protection board and a battery. Figures 1 to 4 The embodiments of the present utility model are described in detail.
[0032] First, refer to Figure 1 and Figure 2The utility model provides a battery protection board 100, comprising a first circuit board 110, a second circuit board 120 and components 130. The second circuit board 120 is stacked on the first circuit board 110, the second circuit board 120 is electrically connected to the first circuit board 110, and a protection area is formed between the second circuit board 120 and the first circuit board 110; the components 130 are arranged in the protection area, and the components 130 are electrically connected to the first circuit board 110 or the second circuit board 120.
[0033] Specifically, the battery protection board 100 of the present solution forms a double-layer circuit board structure through the first circuit board 110 and the second circuit board 120, and a protective area is formed between the two. The components 130 are placed in the protective area and isolated from the outside world, which has a better protection effect and does not require additional shell protection, thereby reducing space occupancy and manufacturing costs.
[0034] In addition, the first circuit board 110 and the second circuit board 120 are stacked, and components 130 are arranged in the middle, which increases the current carrying capacity of the double-layer battery protection board 100.
[0035] It should be noted that the common lithium battery protection board 100 usually includes a control IC, a MOS switch, a resistor, a capacitor and some auxiliary devices. The control IC controls the MOS switch under normal circumstances to connect the battery cell to the external circuit, and when the battery cell voltage or loop current exceeds the specified value, it immediately controls the MOS switch to turn off to protect the safety of the battery cell.
[0036] In some embodiments, reference Figure 2 and Figure 4 A first avoidance groove 111 is formed on the side of the first circuit board 110 facing the second circuit board 120 , and the component 130 is embedded in the first avoidance groove 111 .
[0037] Specifically, this solution is a first specific arrangement method between the component 130 and the two circuit boards. The component 130 is accommodated by the first avoidance groove 111, which has a better protection effect and occupies less overall space.
[0038] More specifically, the component 130 is firstly attached to the surface of the second circuit board 120 , and then the first circuit board 110 and the second circuit board 120 are attached. Meanwhile, the component 130 is embedded in the first avoidance groove 111 opened in the first circuit board 110 .
[0039] In particular, in this solution, the height of the component 130 is equal to the depth of the first avoidance groove 111 .
[0040] It should be noted that the first avoidance groove 111 is hollowed out by a laser cutting process, and the portion of the first circuit board 110 where the first avoidance groove 111 is not provided is used for wiring to ensure the flow capacity.
[0041] In some embodiments, a second avoidance groove is formed on a side of the second circuit board 120 facing the first circuit board 110 , and the component 130 is embedded in the second avoidance groove.
[0042] Specifically, similarly, this solution is a second specific arrangement method between the component 130 and the two circuit boards. The component 130 is stored by the second avoidance groove, which has a good protection effect and occupies a small overall space.
[0043] In particular, in this solution, the height of the component 130 is equal to the depth of the second avoidance groove.
[0044] In some embodiments, a first avoidance groove 111 and a second avoidance groove are respectively provided on opposite sides of the first circuit board 110 and the second circuit board 120. The first avoidance groove 111 and the second avoidance groove are correspondingly arranged. The first avoidance groove 111 and the second avoidance groove constitute a storage cavity, and the component 130 is arranged in the storage cavity.
[0045] Specifically, similarly, this solution is a third specific setting method between the component 130 and the two circuit boards. The component 130 is stored simultaneously through the second avoidance groove and the second avoidance groove, which has a good protection effect and takes up little overall space.
[0046] In particular, in the present solution, the height of the component 130 is equal to the sum of the depths of the first avoidance groove 111 and the second avoidance groove. By respectively opening avoidance grooves on two circuit boards to form a storage cavity, the depth of the grooves on any circuit board is reduced, avoiding opening an avoidance groove on only a single circuit board, which would result in excessive groove depth and damage to the circuit board.
[0047] In some embodiments, reference Figure 2 and Figure 4 A plurality of first avoidance grooves 111 are arranged at intervals along the length direction of the first circuit board 110 , and a plurality of components 130 are provided, and the plurality of components 130 are arranged in the plurality of first avoidance grooves 111 in a one-to-one correspondence.
[0048] Specifically, the battery protection board 100 requires a combination of multiple components 130 to play a role in protecting the circuit. The multiple components 130 are arranged along the length direction of the first circuit board 110, and the arrangement is reasonable and neat for easy storage.
[0049] In some embodiments, reference Figure 2 and Figure 4 The heights of the plurality of components 130 are different, the depths of the plurality of first avoidance grooves 111 are different, and the height of each component 130 is equal to the depth of the corresponding first avoidance groove 111 .
[0050] Specifically, the first avoidance groove 111 is adapted to the size of the component 130 one by one, which can play a role in better protecting the component 130 and minimize the space occupation.
[0051] In some embodiments, the thickness of the first circuit board 110 is 0.5 mm-1.6 mm. Under the requirement of controlling the overall thickness of the battery protection board 100, the thickness of the first circuit board 110 is preferably 0.7 mm, and the maximum depth of the first avoidance groove 111 is 0.4 mm.
[0052] Specifically, this solution provides a specific size relationship between the first circuit board 110 and the first avoidance groove 111 . The first avoidance groove 111 should not be too deep, otherwise it will easily penetrate the circuit board during manufacturing and lose the wrapping effect on the component 130 .
[0053] In some embodiments, reference Figure 3 The first circuit board 110 is attached to the surface of the second circuit board 120, and the distance between the edge of the second circuit board 120 and the edge of the first circuit board 110 is less than or equal to 0.3 mm.
[0054] Specifically, this solution is the board size relationship between the first circuit board 110 and the second circuit board 120. The second circuit board 120 is slightly larger than the first circuit board 110. The second circuit board 120 completely supports the first circuit board 110 to ensure that the contact area between the two is maximized, and completely encloses the components 130 to avoid exposure of the components 130. In addition, the second circuit board 120 does not need to extend beyond the first circuit board 110 too much to ensure that the overall occupied space is small.
[0055] In some embodiments, reference Figure 1 and Figure 2 , further comprising a flexible circuit board 140 , one end of the flexible circuit board 140 is attached to the second circuit board 120 , and the flexible circuit board 140 is electrically connected to the second circuit board 120 .
[0056] It should be noted that the flexible printed circuit 140 (FPC) is a circuit board made of a flexible copper-clad laminate as a substrate, and is used as a medium for signal transmission in the connection of electronic products. It has the characteristics of high wiring assembly density, good bending, light weight, and flexible process. Due to its high integration, ultra-thin thickness, and ultra-softness, it has outstanding advantages in terms of safety, light weight, and regular layout.
[0057] Secondly, the utility model further provides a battery, comprising a battery cell and the battery protection board 100 in the first aspect, wherein the battery cell is electrically connected to the battery protection board 100.
[0058] Specifically, the battery in this solution includes a battery protection board 100, so the battery in this solution has all the beneficial effects of the battery protection board 100. In addition, the battery in this solution also includes other components, and only the components related to this solution are listed here, but it does not limit the composition of the battery.
[0059] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.
Claims
1. A battery protection board, characterized in that: include: A first circuit board (110); A second circuit board (120) is stacked on the first circuit board (110), the second circuit board (120) is electrically connected to the first circuit board (110), and a protection area is formed between the second circuit board (120) and the first circuit board (110); A component (130) is disposed in the protection area, and the component (130) is electrically connected to the first circuit board (110) or the second circuit board (120).
2. The battery protection board according to claim 1, characterized in that: A first avoidance groove (111) is provided on the side of the first circuit board (110) facing the second circuit board (120), and the component (130) is embedded in the first avoidance groove (111).
3. The battery protection board according to claim 1, characterized in that: A second avoidance groove is provided on the side of the second circuit board (120) facing the first circuit board (110), and the component (130) is embedded in the second avoidance groove.
4. The battery protection board according to claim 1, characterized in that: A first avoidance groove (111) and a second avoidance groove are respectively provided on opposite sides of the first circuit board (110) and the second circuit board (120); the first avoidance groove (111) and the second avoidance groove are arranged correspondingly; the first avoidance groove (111) and the second avoidance groove form a storage cavity; and the component (130) is arranged in the storage cavity.
5. The battery protection board according to claim 2, characterized in that: A plurality of the first avoidance grooves (111) are arranged at intervals along the length direction of the first circuit board (110), and a plurality of the components (130) are provided, and the plurality of the components (130) are arranged in a one-to-one correspondence in the plurality of the first avoidance grooves (111).
6. The battery protection board according to claim 5, characterized in that: The heights of the plurality of components (130) are different, the depths of the plurality of first avoidance grooves (111) are different, and the height of each component (130) is equal to the depth of the first avoidance groove (111) corresponding to it.
7. The battery protection board according to claim 6, characterized in that: The thickness of the first circuit board (110) is 0.5 mm-1.6 mm, and the maximum depth of the first avoidance groove (111) is 0.4 mm.
8. The battery protection board according to any one of claims 1 to 7, characterized in that: The first circuit board (110) is attached to the surface of the second circuit board (120), and the distance between the edge of the second circuit board (120) and the edge of the first circuit board (110) is less than or equal to 0.3 mm at all locations.
9. The battery protection board according to any one of claims 1 to 7, characterized in that: It also comprises a flexible circuit board (140), one end of which is attached to the second circuit board (120), and the flexible circuit board (140) is electrically connected to the second circuit board (120).
10. A battery, characterized in that: It comprises a battery cell and a battery protection board (100) according to any one of claims 1 to 9, wherein the battery cell is electrically connected to the battery protection board (100).