Battery protection board, battery pack and electric device

Abstract

The utility model relates to a kind of battery protection plate, battery pack and electric equipment, the battery protection plate includes PCB board and reinforcing part, PCB board includes at least two main body parts and at least one avoiding part, avoiding part is located between any two adjacent main body parts, main body part is equipped with the soldering pad for connecting battery cell, avoiding part is formed with the avoiding gap of the edge structure for avoiding battery cell;Reinforcing part is connected to avoiding part and is similar to the shape of avoiding gap, the battery plate protector can reduce the situation of bending or broken plate when being connected to battery cell.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery protection board, a battery pack, and an electrical device. Background Technology

[0002] Batteries are typically constructed by soldering cells to a PCM (Protection Circuit Module, or battery protection board) and then encapsulating them in an insulating manner. In related technologies, to increase cell capacity without increasing encapsulation space, the PCB board in the PCM is usually changed from being laid flat to being perpendicular to the length of the cell, thus reducing the space occupied by the PCM in the length direction of the cell. However, when the PCM is connected to multiple cells, the PCM needs to make corresponding clearances between the side seals of two adjacent cells. The PCB board in this clearance area of ​​the PCM is thin and narrow, making it susceptible to bending or breakage due to mechanical stress. Utility Model Content

[0003] Based on the above-mentioned technical problems, this utility model provides a battery protection board, a battery pack, and an electrical device, which can reduce the occurrence of bending or breakage of the battery protection board when connected to the battery cell, thereby at least partially solving the above-mentioned technical problems.

[0004] In a first aspect, this utility model provides a battery protection board, comprising: a PCB board including at least two main bodies and at least one clearance portion, the clearance portion being located between any two adjacent main bodies, the main bodies having pads for connecting battery cells, and the clearance portion having clearance notches for clearance of the battery cell's sealing structure; and a reinforcing member connected to the clearance portion and having a shape similar to the clearance notch.

[0005] Optionally, the clearance portion includes a first side facing the battery cell and a second side facing away from the battery cell, and at least one of the first side and the second side is connected to the reinforcing member.

[0006] Optionally, the clearance portion is constructed as a U-shaped groove, and the clearance notch is formed in the space defined by the inner sidewall of the U-shaped groove; the reinforcing member is constructed as a U-shaped plate, and the sidewall of the U-shaped plate is attached to at least one of the first surface and the second surface of the U-shaped groove.

[0007] Optionally, the thickness of the reinforcing member in the direction from the first surface to the second surface is not less than 0.1 mm.

[0008] Optionally, the reinforcement is located within the circumferential contour of the first or second surface.

[0009] Optionally, the minimum distance between the edge of the reinforcing member and the circumferential contour of the first or second surface is not less than 0.2 mm.

[0010] Optionally, the reinforcing member is made of at least one of nickel alloy, copper alloy, aluminum alloy, stainless steel, titanium alloy, polyimide, polyester, carbon fiber composite material and glass fiber.

[0011] Optionally, the number of solder pads is multiple and they are arranged at intervals on the main body.

[0012] A second aspect of this utility model provides a battery pack, including a battery cell and a battery protection board as described in any of the above-mentioned optional solutions, wherein the battery protection board is soldered to the tabs of the battery cell via solder pads.

[0013] A third aspect of this utility model provides an electrical device including the battery pack described above.

[0014] With the above-mentioned technical solution, namely the battery protection board provided by this utility model, when the battery protection board is connected to the battery cell, a reinforcing member with a shape similar to the clearance notch can be connected to the clearance part to reinforce the area where the width and thickness of the clearance part are small. When the battery protection board is connected to multiple battery cells, it can be connected to the battery cell's tab through the solder pad on the main body, and the clearance notch can be used to avoid the side sealing edge between two adjacent battery cells. In this connection method, the capacity of the battery cell can be increased without increasing the battery's packaging space. Furthermore, by reinforcing the clearance part with the reinforcing member, the bending or breakage of the battery protection board when connected to the battery cell can be reduced.

[0015] The beneficial effects of the other optional solutions of this utility model will be demonstrated in the following detailed embodiments. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram showing the positional relationship between the battery protection board and the battery cell provided in an exemplary embodiment of this utility model;

[0018] Figure 2 yes Figure 1 A magnified view of a portion of position A in the middle;

[0019] Figure 3This is a schematic diagram of the front structure of the battery protection board provided in an exemplary embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the back structure of the battery protection board provided in an exemplary embodiment of this utility model;

[0021] Figure 5 These are front views of various structural types of the reinforcing members provided in exemplary embodiments of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. PCB board; 110. Main body; 111. Solder pad; 120. Clearance area; 121. Clearance notch; 122. First side; 123. Second side;

[0024] 2. Reinforcing components;

[0025] 3. Battery cell; 310, tabs. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Batteries are typically constructed by soldering cells to a PCM (Protection Circuit Module, or battery protection board) and then encapsulating them in an insulating manner. In related technologies, to increase cell capacity without increasing encapsulation space, the PCB board in the PCM is usually changed from being laid flat to being perpendicular to the length of the cell, in order to reduce the space occupied by the PCM in the length direction of the cell. However, when the PCM is connected to multiple cells, the PCM needs to make corresponding clearances between the side seals of two adjacent cells. The PCB board in this clearance area of ​​the PCM is thin and narrow, making it susceptible to bending or breakage due to mechanical stress.

[0028] In view of the above-mentioned technical problems, the first aspect of this utility model provides a battery protection board, which can be referred to. Figures 1 to 5As shown, the battery protection board includes a PCB board 1 and a reinforcing member 2. The PCB board 1 includes at least two main body parts 110 and at least one clearance part 120. The clearance part 120 is located between two adjacent main body parts 110. The main body part 110 is provided with a solder pad 111 for connecting the battery cell 3. The clearance part 120 is formed with a clearance notch 121 for clearance of the sealing structure of the battery cell 3. The reinforcing member 2 is connected to the clearance part 120 and has a similar shape to the clearance notch 121.

[0029] With the above-mentioned technical solution, namely the battery protection board provided by this utility model, when the battery protection board is connected to the battery cell 3, a reinforcing member 2 with a shape similar to the clearance notch 121 can be connected to the clearance part 120 to reinforce the area of ​​the clearance part 120 where the width and thickness are small. When the battery protection board is connected to multiple battery cells 3, it can be connected to the electrode tab of the battery cell 3 through the solder pad 111 on the main body 110, and the side sealing edge between two adjacent battery cells 3 can be avoided through the clearance notch 121. Under this connection method, the capacity of the battery cell 3 can be increased without increasing the battery packaging space. Furthermore, the reinforcement of the clearance part 120 by the reinforcing member 2 can also reduce the occurrence of bending or breakage of the battery protection board when connected to the battery cell.

[0030] It should be noted that the reinforcing member 2 mentioned in the above embodiment specifically reinforces the area of ​​the clearance portion 120 with smaller width and thickness, which can be referred to as Figures 2 to 4 As shown, in this battery protection board, since the clearance part 120 serves to avoid the side sealing edge of the battery cell, its width and thickness are smaller than those of the main body part 110. Therefore, when the battery protection board is connected to multiple battery cells 3, the bending resistance of the clearance part 120 is slightly insufficient compared to the main body part 110. Therefore, the clearance part 120 can be thickened and reinforced by the reinforcing member 2 mentioned in the above embodiment to improve the bending resistance of the clearance part 120 and thereby reduce the bending and breakage of the battery protection board.

[0031] Furthermore, the reinforcing member 2 mentioned in the above embodiments can be any suitable component structure that can be connected to the clearance portion 120. For example, the reinforcing member 2 can be a reinforcing rib or a sheet structure. In addition, depending on the structure of the side sealing edge of the battery cell 3, the specific shapes of the reinforcing member 2 and the clearance notch 121 can also be adapted. Specifically, the present invention will provide detailed examples of the specific structure of the reinforcing member 2 below, without further limitation.

[0032] In some implementations, reference Figures 1 to 4As shown, the clearance portion 120 includes a first surface 122 facing the battery cell 3 and a second surface 123 facing away from the battery cell 3, and at least one of the first surface 122 and the second surface 123 is connected to a reinforcing member 2.

[0033] In the above manner, the reinforcing member 2 can be arranged on one side of the clearance portion 120 or on both sides of the clearance portion 120 to thicken and reinforce the clearance portion 120, which has a small width and thickness. It can be understood that, under the premise that the internal packaging space of the battery pack remains unchanged, when the capacity of the battery cell 3 meets the actual usage size, the reinforcing member 2 can be arranged on both sides of the clearance portion 120 to maximize the bending resistance of the clearance portion 120. However, when the capacity of the battery cell 3 does not meet the actual usage size, it is necessary to further increase the space ratio of the battery cell 3 within the battery pack. In this case, the reinforcing member 2 can be arranged on one side of the clearance portion 120, that is, sacrificing some of the bending resistance of the clearance portion 120 to increase the space ratio of the battery cell 3. Both of the above methods can be selected reasonably according to the actual situation, and this embodiment does not make specific limitations on this.

[0034] In some implementations, reference Figures 1 to 5 As shown, the clearance portion 120 is constructed as a U-shaped groove, and the clearance notch 121 is formed in the space defined by the inner sidewall of the U-shaped groove; the reinforcing member 2 is constructed as a U-shaped plate, and the sidewall of the U-shaped plate is attached to at least one of the first surface 122 and the second surface 123 of the U-shaped groove.

[0035] By constructing the clearance portion 120 as a U-shaped groove and the reinforcing member 2 as a U-shaped plate in the above manner, the clearance notch 121 formed on the inner sidewall of the U-shaped groove allows the side sealing edges between multiple battery cells 3 to pass through the clearance notch 121 to form clearance, and the U-shaped plate is attached to the U-shaped groove for thickening and reinforcement, thereby further enhancing the bending resistance of the clearance portion 120.

[0036] It should be noted that the reinforcing member 2, which is constructed as a U-shaped plate, can also be flexibly shaped according to the specific different shapes of the U-shaped groove, for example... Figure 5 The illustration shows various suitable deformation methods for the reinforcing member 2 when it is a U-shaped plate. Those skilled in the art can select a suitable U-shaped plate to reinforce the U-shaped groove according to the different specific reinforcement requirements of the U-shaped groove. This embodiment does not make specific limitations in this regard.

[0037] In some implementations, reference Figures 1 to 5 As shown, the thickness of the reinforcing member 2 in the direction from the first surface 122 toward the second surface 123 is not less than 0.1 mm.

[0038] In this way, the minimum thickness of the reinforcing member 2 is 0.1 mm, which can ensure that the reinforcing member 2 provides a minimum reinforcement effect for the avoidance part 120, and can also minimize the space occupied by the battery protection board in the battery pack, so as to maximize the capacity of the cell 3 in the battery pack.

[0039] It should be noted that the above embodiments are merely illustrative examples of the thickness of the reinforcing member 2. It can be understood that, while maximizing the capacity of the cell 3 within the battery pack, the thickness of the reinforcing member 2 can be any suitable thickness greater than 0.1 mm. For example, 0.2 mm, 0.3 mm, or other suitable thicknesses can be used. This embodiment does not impose any specific limitations on this.

[0040] In some implementations, reference Figures 2 to 4 As shown, the reinforcing member 2 is located within the circumferential contour of the first surface 122 or the second surface 123.

[0041] With the above arrangement, when the reinforcing member 2 is connected to the PCB board 1, the edge of the reinforcing member 2 can always be located within the circumferential contour of the first surface 122 or the second surface 123 of the PCB board 1. Under this arrangement, when the battery protection board is connected to the cell 3 as a whole, the reinforcing member 2 will not interfere with the PCB board 1 and the cell 3, thereby improving the reasonable coordination of the connection between the battery protection board and the cell 3, and also facilitating the subsequent encapsulation of the battery pack.

[0042] In some implementations, reference Figures 1 to 4 As shown, the minimum distance between the edge of the reinforcing member 2 and the circumferential contour of the first surface 122 or the second surface 123 is not less than 0.2 mm.

[0043] In this way, the edge of the reinforcing member 2 always maintains a gap of not less than 0.2mm with the circumferential contour of the first surface 122 or the second surface 123 of the PCB board 1. This can not only reinforce the weak areas of the PCB board 1 through the reinforcing member 2, but also reduce or avoid the situation where the edge of the reinforcing member 2 is too close to the edge of the PCB board 1, which would cause difficulties in processing or connection.

[0044] In some implementations, reference Figures 1 to 5 As shown, the reinforcing member 2 is made of at least one of nickel alloy, copper alloy, aluminum alloy, stainless steel, titanium alloy, polyimide (PI), polyester (PET), carbon fiber composite material and glass fiber.

[0045] Through the specific methods described above, the reinforcing member 2 made of any of the aforementioned materials can improve its own structural strength. Consequently, when the reinforcing member 2 is connected to the clearance portion 120 of the PCB board 1, it can also improve the reinforcement effect at the clearance portion 120. Furthermore, the reinforcing member 2 can be manufactured by selecting one of the aforementioned materials or by combining multiple of the aforementioned materials. For example, when the reinforcing member 2 is made of a combination of titanium alloy and glass fiber, it can improve the structural strength and bending resistance of the reinforcing member 2, as well as its lightweight nature.

[0046] In some implementations, reference Figures 1 to 3 As shown, there are multiple pads 111 arranged at intervals on the main body 110.

[0047] In the above manner, the connection stability between the battery protection board and the battery cell 3 can be improved by using multiple solder pads 111. For example, multiple solder pads 111 can be soldered to the tabs 310 of the battery cell 3 one by one, thereby providing normal overcharge, over-discharge current protection and over-temperature protection for the battery cell 3, so as to improve the safety performance of the battery cell 3 during operation.

[0048] In a second aspect, this utility model provides a battery pack, which includes a battery cell 3 and a battery protection board mentioned in the above specific embodiments, and has all the beneficial effects of the above specific embodiments, wherein the battery protection board can be soldered to the tabs 310 of the battery cell 3 via solder pads 111.

[0049] In the above manner, when the battery pack uses the battery protection board, the bending resistance of the battery protection board can be improved after the battery pack itself is encapsulated. Furthermore, by connecting the battery protection board to the battery cell perpendicular to the length of the cell, the space occupied by the battery protection board in the battery pack can be further saved, thereby increasing the capacity of the battery cell 3 in the battery pack and improving the battery pack's power consumption range.

[0050] A third aspect of this utility model provides an electrical device that includes the battery pack mentioned in the above embodiments and has all the beneficial effects of the above specific embodiments. In this embodiment, the electrical device can be any device that can be charged and discharged by the battery pack. For example, the electrical device can be a smartphone, tablet computer, walkie-talkie, etc. in communication devices, or an LED lamp in lighting devices, or any suitable device such as an industrial robot, motor driver, frequency converter, or actuator in industrial control devices. As long as those skilled in the art can apply the battery pack to different suitable types of devices in any suitable scenario, this embodiment does not limit the electrical device in too much.

[0051] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of protection claimed by the present invention.

Claims

1. A battery protection board, characterized in that, include: PCB board (1) includes at least two main body parts (110) and at least one clearance part (120), the clearance part (120) is located between any two adjacent main body parts (110), the main body part (110) is provided with pads (111) for connecting the battery cell (3), and the clearance part (120) is formed with clearance notches (121) for clearance of the sealing structure of the battery cell (3); The reinforcing member (2) is connected to the clearance portion (120) and has a similar shape to the clearance notch (121).

2. The battery protection board according to claim 1, characterized in that, The avoidance part (120) includes a first surface (122) facing the battery cell (3) and a second surface (123) facing away from the battery cell (3), and at least one of the first surface (122) and the second surface (123) is connected to the reinforcing member (2).

3. The battery protection board according to claim 2, characterized in that, The clearance portion (120) is constructed as a U-shaped groove, and the clearance notch (121) is formed in the space defined by the inner sidewall of the U-shaped groove; The reinforcing member (2) is constructed as a U-shaped plate, the sidewall of which is attached to at least one of the U-shaped groove located on the first surface (122) and the second surface (123).

4. The battery protection board according to claim 3, characterized in that, The thickness of the reinforcing member (2) in the direction from the first surface (122) toward the second surface (123) is not less than 0.1 mm.

5. The battery protection board according to claim 4, characterized in that, The reinforcing member (2) is located within the circumferential contour of the first surface (122) or the second surface (123).

6. The battery protection board according to claim 5, characterized in that, The minimum distance between the edge of the reinforcing member (2) and the circumferential contour of the first surface (122) or the second surface (123) is not less than 0.2 mm.

7. The battery protection board according to any one of claims 1-6, characterized in that, The reinforcing member (2) is made of at least one of nickel alloy, copper alloy, aluminum alloy, stainless steel, titanium alloy, polyimide, polyester, carbon fiber composite material and glass fiber.

8. The battery protection board according to any one of claims 1-6, characterized in that, The number of the pads (111) is multiple and they are arranged at intervals on the main body (110).

9. A battery pack, characterized in that, It includes a battery cell (3) and a battery protection board as described in any one of claims 1-8, wherein the battery protection board is welded to the tabs (310) of the battery cell (3) via pads (111).

10. An electrical appliance, characterized in that, Includes the battery pack as described in claim 9.

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