Battery protection board

Abstract

The utility model discloses a battery protection board, and relates to the technical field of battery protection board design. The battery protection board comprises a protection board body, the protection board body comprises a hard circuit board and a flexible circuit board which are stacked, the hard circuit board is electrically connected with the flexible circuit board, one surface, facing the flexible circuit board, of the hard circuit board is provided with an accommodating groove, and a functional device is arranged in the accommodating groove. According to the scheme, the problem that an existing battery protection plate is large in thickness can be solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of battery protection plate design, and particularly relates to a battery protection plate. BACKGROUND

[0002] The battery protection plate usually refers to a lithium battery protection plate, which is mainly determined by the material of the lithium battery itself and cannot be overcharged, overdischarged, overcurrent and short-circuited, so a special battery protection plate is arranged for protection, the voltage of the battery body and the current of the charge-discharge circuit are monitored in the environment of-40 DEG C to +85 DEG C, and the on-off of the current circuit is controlled in time.

[0003] The battery protection plate comprises a protection plate body and a connector connected with each other, wherein the protection plate body is electrically connected with the tab of the battery cell, and a plurality of functional devices are arranged on the two opposite surfaces of the protection plate body, which leads to a large thickness of the battery protection plate, and the battery protection plate needs to occupy a large space at the head of the battery. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiment of the application is to provide a battery protection plate which can solve the problem of large thickness of the current battery protection plate.

[0005] In order to solve the above technical problem, the application is implemented as follows:

[0006] The embodiment of the application provides a battery protection plate, which comprises a protection plate body, the protection plate body comprises a hard circuit board and a flexible circuit board which are stacked, the hard circuit board is electrically connected with the flexible circuit board, one side of the hard circuit board facing the flexible circuit board is provided with a receiving groove, and the receiving groove is provided with a functional device.

[0007] Optionally, in the thickness direction of the hard circuit board, the receiving groove penetrates through the hard circuit board, and the functional device is electrically connected with the flexible circuit board.

[0008] Optionally, the groove depth of the receiving groove is smaller than the thickness of the hard circuit board, the flexible circuit board covers the groove opening of the receiving groove to form a receiving space, and the functional device is arranged in the receiving space.

[0009] Optionally, the number of the functional devices arranged in the same receiving groove is at least two, in the thickness direction of the protection plate body, part of the functional devices are arranged on the bottom surface of the receiving space and are electrically connected with the flexible circuit board, and the other part of the functional devices are arranged on the top surface of the receiving space and are electrically connected with the hard circuit board.

[0010] Optionally, in the length direction of the protection plate body, the functional devices arranged on the top surface and the functional devices arranged on the bottom surface are sequentially staggered.

[0011] Optionally, the number of the accommodating grooves is at least two, each of the accommodating grooves is arranged in sequence and spaced along the length direction of the protection plate body, and each of the accommodating grooves is provided with the functional device,

[0012] The same flexible circuit board covers the opening of each of the accommodating grooves, and the functional device arranged in each of the accommodating grooves is electrically connected with the flexible circuit board or the rigid circuit board.

[0013] Optionally, the number of the accommodating grooves is at least two, each of the accommodating grooves is arranged in sequence and spaced along the length direction of the protection plate body, and each of the accommodating grooves is provided with the functional device,

[0014] The number of the flexible circuit boards is at least two, each of the flexible circuit boards covers the opening of at least one of the accommodating grooves, each of the flexible circuit boards is electrically connected with the rigid circuit board, and the functional device arranged in each of the accommodating grooves is electrically connected with the flexible circuit board covering the accommodating groove.

[0015] Optionally, the rigid circuit board comprises at least two board segments arranged in sequence, the accommodating grooves are formed between adjacent board segments, the flexible circuit board is opposite to the accommodating grooves, in the length direction of the protection plate body, the first end and the second end of the flexible circuit board opposite to each other are electrically connected with adjacent board segments respectively, and the functional device is electrically connected with the flexible circuit board,

[0016] The protection plate body further comprises a first reinforcing circuit board superposed with the flexible circuit board, and the first reinforcing circuit board is superposed on the side of the flexible circuit board away from the functional device.

[0017] Optionally, the protection plate body further comprises a second reinforcing circuit board, the second reinforcing circuit board is arranged on the side of the rigid circuit board away from the flexible circuit board, the second reinforcing circuit board is opposite to the flexible circuit board, in the length direction of the protection plate body, the first end and the second end of the second reinforcing circuit board opposite to each other are electrically connected with adjacent board segments respectively.

[0018] Optionally, the protection plate body further comprises a second reinforcing circuit board, the installation grooves are arranged on the two sides of adjacent board segments opposite to each other, the installation grooves extend to the side of the rigid circuit board away from the flexible circuit board, the first end and the second end of the second reinforcing circuit board opposite to each other are overlapped in the installation grooves of adjacent board segments and electrically connected with adjacent board segments respectively, and the side of the second reinforcing circuit board away from the flexible circuit board is flush with the side of the rigid circuit board away from the flexible circuit board.

[0019] In the embodiment of the present application, the protection plate body of the battery protection plate comprises a hard circuit board and a flexible circuit board which are stacked, the hard circuit board is electrically connected with the flexible circuit board, a receiving groove is formed on the side of the hard circuit board facing the flexible circuit board, and a functional device is arranged in the receiving groove. In this case, the functional device can avoid occupying extra space in the thickness direction of the battery protection plate, thereby reducing the thickness of the battery protection plate. At the same time, the functional device arranged in the receiving groove of the hard circuit board can avoid being damaged, thereby ensuring the working performance of the functional device. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figures 1-2 Structure schematic diagram of the battery protection plate in different viewing angles disclosed by the first embodiment of the present application;

[0021] Figure 3 Exploded view of the battery protection plate disclosed by the second embodiment of the present application;

[0022] Figure 4 Structure schematic diagram of the battery protection plate disclosed by the second embodiment of the present application;

[0023] Figure 5 Structure schematic diagram of the flexible circuit board and the first reinforcing circuit board disclosed by the third embodiment of the present application;

[0024] Figure 6 Structure schematic diagram of the hard circuit board and the connector disclosed by the third embodiment of the present application;

[0025] Figure 7 Partial structure schematic diagram of the battery protection plate disclosed by the third embodiment of the present application;

[0026] Figure 8 Structure schematic diagram of the battery protection plate disclosed by the third embodiment of the present application;

[0027] Figure 9 Structure schematic diagram of the battery protection plate disclosed by the fourth embodiment of the present application;

[0028] Figure 10 Structure schematic diagram of the hard circuit board and the connector disclosed by the fifth embodiment of the present application;

[0029] Figure 11 Structure schematic diagram of the battery protection plate disclosed by the fifth embodiment of the present application.

[0030] Explanation of reference signs:

[0031] 100 - protection board body, 110 - rigid circuit board, 111 - accommodating groove, 112 - board segment, 112a - mounting groove, 120 - flexible circuit board, 130 - functional device, 131 - control IC, 132 - power meter, 140 - first reinforcing circuit board, 150 - second reinforcing circuit board;

[0032] 200 - connector. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents a "or" relationship between the front and rear associated objects.

[0035] The battery protection board provided by the embodiments of the present application will be described in detail below in combination with the drawings and specific embodiments and application scenarios.

[0036] As shown in the drawings, Figures 1-11 The present application provides a battery protection board, which comprises a protection board body 100, and the protection board body 100 comprises a stacked rigid circuit board 110 and a flexible circuit board 120, that is, the protection board body 100 is a soft and hard combination board. The flexible circuit board 120 has the characteristics of high integration, thinness, flexibility, etc., and the rigid circuit board 110 has the characteristics of high hardness, good bending resistance, high reliability, long service life, etc. The rigid circuit board 110 is electrically connected with the flexible circuit board 120, and the rigid circuit board 110 is provided with an accommodating groove 111 on the side facing the flexible circuit board 120. The accommodating groove 111 is provided with a functional device 130. Optionally, the functional device 130 can be a control IC, a MOS switch, a resistor, a capacitor, and an auxiliary device (an NTC temperature sensor, an ID memory, etc.), and the embodiments of the present application do not make specific limitations.

[0037] Optionally, the battery protection board also includes a connector 200, which is electrically connected to the protection board body 100. The protection board body 100 is electrically connected to the tabs of the battery cell, and the connector 200 is electrically connected to a structure outside the battery (such as a motherboard) to ensure that the current stored in the battery can be transmitted stably.

[0038] In this embodiment, a receiving groove 111 is formed on the side of the rigid circuit board 110 facing the flexible circuit board 120, and the functional device 130 is disposed within the receiving groove 111. In this case, the functional device 130 can avoid occupying additional space in the thickness direction of the battery protection board, thereby reducing the thickness of the battery protection board. At the same time, the functional device 130 is disposed within the receiving groove of the rigid circuit board 110, which can prevent the functional device 130 from being damaged, thereby ensuring the working performance of the functional device 130. Therefore, this solution can solve the problem of the current battery protection board having a large thickness.

[0039] In addition, in the above embodiments, once the space occupied by the battery is determined, when the thickness of the battery protection board is reduced, the size of the battery body can be appropriately increased, thereby increasing the battery capacity; or, when the battery capacity is determined, when the thickness of the battery protection board is reduced, the space occupied by the battery can be reduced.

[0040] like Figures 1-2 As shown, in one optional embodiment, a receiving groove 111 penetrates the rigid circuit board 110 in the thickness direction, that is, the receiving groove 111 extends to the side of the rigid circuit board 110 opposite to the flexible circuit board 120, and the receiving groove 111 has a through-hole structure. The functional device 130 is electrically connected to the flexible circuit board 120, thereby supplying power to the functional device 130 to ensure that the functional device 130 can work normally. In this solution, the receiving groove 111 penetrates the rigid circuit board 110, making the groove depth of the receiving groove 111 relatively large, and correspondingly, the receiving space of the receiving groove 111 is also large. At this time, it can accommodate a larger functional device 130, which is especially convenient for the installation of a functional device 130 with a larger height.

[0041] Optionally, when there are multiple functional devices 130, the functional devices 130 with larger height can be placed in the receiving groove 111, while the functional devices 130 with smaller height can be directly placed on the side of the rigid circuit board 110 away from the flexible circuit board 120, such as MOS switches. This application embodiment does not impose specific limitations on this.

[0042] like Figures 3-4As shown, in another optional embodiment, the groove depth of the accommodating groove 111 is less than the thickness of the rigid circuit board 110, the rigid circuit board 110 forms the groove bottom of the accommodating groove 111, and the flexible circuit board 120 covers the groove opening of the accommodating groove 111 to enclose the accommodating space, and the functional device 130 is arranged in the accommodating space, which can better protect the functional device 130 from being damaged by collision with other structures. In this scheme, since the groove depth of the accommodating groove 111 is less than the thickness of the rigid circuit board 110, and the rigid circuit board 110 forms the groove bottom of the accommodating groove 111, the structural strength of the position where the accommodating groove 111 of the protection plate body 100 is located can be greater, thereby facilitating the increase of the overall structural strength of the protection plate body 100.

[0043] Optionally, the number of functional devices 130 arranged in the same accommodating groove 111 can be one; or the number of functional devices 130 arranged in the same accommodating groove 111 is at least two, that is, a plurality of functional devices 130 are arranged in the same accommodating groove 111, which can improve the space utilization of the accommodating groove 111; and can also improve the multifunctionality of the battery protection plate.

[0044] Optionally, the functional devices 130 arranged in the same accommodating groove 111 can be arranged on the bottom surface or the top surface of the accommodating space; or in the thickness direction of the protection plate body 100, part of the functional devices 130 are arranged on the bottom surface of the accommodating space and are electrically connected with the flexible circuit board 120, that is, the flexible circuit board 120 supplies power to the part of the functional devices 130, and the other part of the functional devices 130 are arranged on the top surface of the accommodating space and are electrically connected with the rigid circuit board 110, that is, the rigid circuit board 110 supplies power to the part of the functional devices 130. This scheme distributes the plurality of functional devices 130 on the top surface and the bottom surface of the accommodating space, thereby facilitating the flexible arrangement of the functional devices 130.

[0045] Optionally, the functional devices 130 arranged on the top surface and the bottom surface of the accommodating space can be arranged arbitrarily; or in another optional embodiment, in the length direction of the protection plate body 100, the functional devices 130 arranged on the top surface of the accommodating space and the functional devices 130 arranged on the bottom surface of the accommodating space are sequentially staggered, thereby dispersing the arrangement of the functional devices 130 arranged on the top surface and the bottom surface of the accommodating space, facilitating heat dissipation; and when the height of the functional device 130 is greater than one half of the height of the accommodating space, the above arrangement can stagger the adjacent functional devices 130, thereby avoiding interference.

[0046] Optionally, in the above embodiments, the functional device 130 arranged on the top surface of the accommodating space can include a control IC 131, a power meter 132, and other functional devices, and can also include an NTC temperature sensor, and the embodiments of the present application do not make specific limitations in this regard; further optionally, the functional device 130 arranged on the top surface of the accommodating space can be electrically connected to the hard circuit board 110 by means of gold wire, and the functional device 130 can also be electrically connected to the hard circuit board 110 by other means, and the embodiments of the present application do not make specific limitations in this regard.

[0047] Optionally, in any of the above embodiments, the number of accommodating grooves 111 can be one; or the number of accommodating grooves 111 is at least two, each accommodating groove 111 is arranged in sequence along the length direction of the protection plate body 100, and each accommodating groove 111 is provided with a functional device 130, at this time, more functional devices 130 can be arranged, thereby increasing the multifunctionality of the battery protection plate; and the plurality of functional devices 130 can be arranged in dispersion, thereby avoiding mutual influence between the functional devices 130 in each accommodating groove 111.

[0048] Optionally, the same flexible circuit board 120 covers the groove openings of each accommodating groove 111, and the functional devices 130 arranged in each accommodating groove 111 are electrically connected to the flexible circuit board 120 or the hard circuit board 110, at this time, the plurality of functional devices 130 are electrically connected to the same flexible circuit board 120, or the plurality of functional devices 130 are electrically connected to the same hard circuit board 110, thereby facilitating centralized control of the plurality of functional devices 130.

[0049] Optionally, when a plurality of functional devices 130 are arranged in each accommodating groove 111, part of the functional devices 130 in each accommodating groove 111 are electrically connected to the flexible circuit board 120, and the other part of the functional devices 130 are electrically connected to the hard circuit board 110, that is, the plurality of functional devices 130 arranged in the same accommodating groove 111 are controlled by different circuit boards, which can facilitate the wiring of each circuit board.

[0050] Optionally, in any of the above embodiments, the number of accommodating grooves 111 can be one; or the number of accommodating grooves 111 is at least two, each accommodating groove 111 is arranged in sequence along the length direction of the protection plate body 100, and each accommodating groove 111 is provided with a functional device 130, at this time, more functional devices 130 can be arranged, thereby increasing the multifunctionality of the battery protection plate; and the plurality of functional devices 130 can be arranged in dispersion, thereby avoiding mutual influence between the functional devices 130 in each accommodating groove 111.

[0051] Optionally, the number of the flexible circuit board 120 is at least two, each flexible circuit board 120 covers the slot opening of the at least one accommodating groove 111, specifically, each flexible circuit board 120 can cover the slot opening of each accommodating groove 111, that is, each flexible circuit board 120 is arranged in one-to-one correspondence with each accommodating groove 111, or one flexible circuit board 120 can cover the slot opening of the at least one accommodating groove 111. Each flexible circuit board 120 is electrically connected with the rigid circuit board 110, the functional device 130 arranged in each accommodating groove 111 is electrically connected with the flexible circuit board 120 covering the accommodating groove 111. When the functional device 130 arranged in each accommodating groove 111 is electrically connected with the flexible circuit board 120 covering the accommodating groove 111, the functional device 130 arranged in each accommodating groove 111 can be controlled individually, avoiding mutual influence; and once the functional device 130 in part of the accommodating grooves 111 fails, the functional devices 130 in other accommodating grooves 111 can still work. Optionally, the functional devices 130 arranged in different accommodating grooves 111 can be the same or different, which is not limited here.

[0052] Optionally, when a plurality of functional devices 130 are arranged in each accommodating groove 111, part of the functional devices 130 (such as functional devices 130 with the same function) in each accommodating groove 111 are electrically connected with the flexible circuit board 120 covering the accommodating groove 111, and the other part of the functional devices 130 (such as functional devices 130 with different functions) in each accommodating groove 111 are electrically connected with the rigid circuit board 110, that is, the plurality of functional devices 130 arranged in the same accommodating groove 111 are controlled by different control methods.

[0053] As shown in FIG. 1, Figures 5-11 In another optional embodiment, the rigid circuit board 110 includes at least two board segments 112 arranged at intervals, the accommodating grooves 111 are formed between adjacent board segments 112, the flexible circuit board 120 is opposite to the accommodating groove 111, in the length direction of the protection board body 100, the first end and the second end of the flexible circuit board 120 opposite to each other are electrically connected with the adjacent board segments 112 respectively, and the functional device 130 is electrically connected with the flexible circuit board 120, that is, the protection board body 100 is formed in a splicing manner, which can avoid slotting on the rigid circuit board 110, thereby reducing the manufacturing difficulty of the battery protection board. Optionally, the flexible circuit board 120 and the adjacent board segments 112 of the rigid circuit board 110 can be connected by welding.

[0054] Optionally, the protection plate body 100 further comprises a first reinforcing circuit board 140 stacked with the flexible circuit board 120. The first reinforcing circuit board 140 can be made of steel, aluminum, ceramic or the like, which is not limited here. The first reinforcing circuit board 140 is stacked on the side of the flexible circuit board 120 away from the functional device 130, so as to increase the structural strength of the flexible circuit board 120, and further make the structural strength of the area where the accommodating groove 111 of the protection plate body 100 is located consistent with that of other areas. Optionally, in the thickness direction of the protection plate body 100, the orthographic projection of the first reinforcing circuit board 140 is equal to or slightly smaller than that of the flexible circuit board 120, so as to ensure the structural strength of the flexible circuit board 120.

[0055] In the optional embodiment, the protection plate body 100 further comprises a second reinforcing circuit board 150. The second reinforcing circuit board 150 can be made of steel, aluminum, ceramic or the like, which is not limited here. The second reinforcing circuit board 150 is arranged on the side of the rigid circuit board 110 away from the flexible circuit board 120, i.e. the second reinforcing circuit board 150 and the flexible circuit board 120 are arranged on the opposite sides of the rigid circuit board 110, the second reinforcing circuit board 150 is opposite to the flexible circuit board 120, and the accommodating groove 111 is located between the second reinforcing circuit board 150 and the flexible circuit board 120. In the length direction of the protection plate body 100, the first end and the second end of the second reinforcing circuit board 150 opposite to each other are electrically connected with the adjacent plate segments 112. In this scheme, the second reinforcing circuit board 150 not only can protect the functional device 130 arranged in the accommodating groove 111, but also can further increase the structural strength of the area where the accommodating groove 111 of the protection plate body 100 is located, so as to further improve the consistency of the structural strength of each area of the protection plate body 100. In addition, the groove depth of the accommodating groove 111 in this scheme is large, which is conducive to the arrangement of the functional device 130 with large size.

[0056] In another alternative embodiment, the protection plate body 100 further comprises a second reinforcing circuit board 150, which can be made of steel, aluminum, ceramic or the like, which is not specifically limited herein. The two opposite surfaces of the adjacent plate segments 112 are provided with mounting grooves 112a, which extend to the surface of the rigid circuit board 110 away from the flexible circuit board 120. The first and second ends of the second reinforcing circuit board 150 opposite to each other are respectively overlapped in the mounting grooves 112a of the adjacent plate segments 112 and are electrically connected to the adjacent plate segments 112. The surface of the second reinforcing circuit board 150 away from the flexible circuit board 120 is flush with the surface of the rigid circuit board 110 away from the flexible circuit board 120, so that the flatness of the surface of the protection plate body 100 is better. In this scheme, the second reinforcing circuit board 150 not only protects the functional device 130 arranged in the accommodating groove 111, but also further increases the structural strength of the area of the accommodating groove 111 of the protection plate body 100, thereby further improving the consistency of the structural strength of each area of the protection plate body 100. In addition, the second reinforcing circuit board 150 is arranged between the adjacent plate segments 112, and in the thickness direction of the protection plate body 100, the second reinforcing circuit board 150 does not need to occupy additional space, which is conducive to reducing the thickness of the protection plate body 100.

[0057] Optionally, the thicknesses of the flexible circuit board 120, the first reinforcing circuit board 140 and the second reinforcing circuit board 150 are all much smaller than the thickness of the rigid circuit board 110, thereby reducing the thickness of the protection plate body 100. Optionally, the thickness of the first reinforcing circuit board 140 can be smaller than the thickness of the flexible circuit board 120, thereby further reducing the thickness of the protection plate body 100.

[0058] Optionally, at least one of the first reinforcing circuit board 140 and the second reinforcing circuit board 150 can be made of a rigid circuit board, which has the characteristics of high hardness, good bending resistance, high reliability and long service life.

[0059] Optionally, the functional device 130 and the flexible circuit board 120, and the functional device 130 and the rigid circuit board 110 can be connected by welding, which can be performed by using high-temperature solder paste and low-temperature solder paste, so as to ensure the connection reliability of the functional device 130.

[0060] Based on the battery protection plate disclosed in the embodiments of the present application, the manufacturing process is as follows:

[0061] S100, connecting the first reinforcing circuit board 140 and the flexible circuit board 120.

[0062] S200, welding the functional device 130 to the flexible circuit board 120.

[0063] S300, connect the first end and the second end of the flexible circuit board 120, which are opposite to each other, to the adjacent board segments 112 of the rigid circuit board 110, respectively.

[0064] S400, connect the first end and the second end of the second reinforcing circuit board 150, which are opposite to each other, to the adjacent board segments 112 of the rigid circuit board 110, respectively, to increase the strength of the protection board body 100.

[0065] S500, repeat steps S100 to S400 to realize the connection of N board segments 112.

[0066] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the specific embodiments described above, which are only illustrative but not restrictive, and those of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A battery protection board, characterized in that, The system includes a protection board body (100), which includes a rigid circuit board (110) and a flexible circuit board (120) stacked together. The rigid circuit board (110) and the flexible circuit board (120) are electrically connected. The rigid circuit board (110) has a receiving groove (111) on the side facing the flexible circuit board (120), and a functional device (130) is provided in the receiving groove (111).

2. The battery protection board according to claim 1, characterized in that, In the thickness direction of the rigid circuit board (110), the receiving groove (111) penetrates the rigid circuit board (110), and the functional device (130) is electrically connected to the flexible circuit board (120).

3. The battery protection board according to claim 1, characterized in that, The depth of the receiving groove (111) is less than the thickness of the rigid circuit board (110). The flexible circuit board (120) covers the opening of the receiving groove (111) to form a receiving space. The functional device (130) is disposed in the receiving space.

4. The battery protection board according to claim 3, characterized in that, The number of functional devices (130) disposed in the same receiving groove (111) is at least two. In the thickness direction of the protective plate body (100), some of the functional devices (130) are disposed on the bottom surface of the receiving space and electrically connected to the flexible circuit board (120), while other parts of the functional devices (130) are disposed on the top surface of the receiving space and electrically connected to the rigid circuit board (110).

5. The battery protection board according to claim 4, characterized in that, Along the length of the protective plate body (100), the functional devices (130) disposed on the top surface and the functional devices (130) disposed on the bottom surface are arranged in a staggered manner.

6. The battery protection board according to claim 2 or 3, characterized in that, The number of the receiving slots (111) is at least two, and each of the receiving slots (111) is arranged sequentially at intervals along the length direction of the protective plate body (100), and each of the receiving slots (111) is provided with the functional device (130). The same flexible circuit board (120) covers the opening of each of the receiving slots (111), and the functional device (130) disposed in each of the receiving slots (111) is electrically connected to the flexible circuit board (120) or the rigid circuit board (110).

7. The battery protection board according to claim 2 or 3, characterized in that, The number of the receiving slots (111) is at least two, and each of the receiving slots (111) is arranged sequentially at intervals along the length direction of the protective plate body (100), and each of the receiving slots (111) is provided with the functional device (130). The number of flexible circuit boards (120) is at least two, each flexible circuit board (120) covers the opening of at least one of the receiving grooves (111), each flexible circuit board (120) is electrically connected to the rigid circuit board (110), and the functional device (130) disposed in each of the receiving grooves (111) is electrically connected to the flexible circuit board (120) covering the receiving groove (111).

8. The battery protection board according to claim 1, characterized in that, The rigid circuit board (110) includes at least two spaced-apart segments (112), with a receiving groove (111) formed between adjacent segments (112). The flexible circuit board (120) is opposite to the receiving groove (111). In the length direction of the protective board body (100), the first and second ends of the flexible circuit board (120) facing away from each other are electrically connected to the adjacent segments (112), respectively. The functional device (130) is electrically connected to the flexible circuit board (120). The protective board body (100) also includes a first reinforcing circuit board (140) stacked with the flexible circuit board (120), the first reinforcing circuit board (140) being stacked on the side of the flexible circuit board (120) facing away from the functional device (130).

9. The battery protection board according to claim 8, characterized in that, The protection board body (100) also includes a second reinforcing circuit board (150), which is disposed on the side of the rigid circuit board (110) away from the flexible circuit board (120). The second reinforcing circuit board (150) is opposite to the flexible circuit board (120). In the length direction of the protection board body (100), the first end and the second end of the second reinforcing circuit board (150) are respectively electrically connected to the adjacent board segment (112).

10. The battery protection board according to claim 8, characterized in that, The protective board body (100) also includes a second reinforcing circuit board (150). Each of the two opposite sides of the adjacent board segments (112) is provided with a mounting groove (112a). The mounting groove (112a) extends to the side of the rigid circuit board (110) away from the flexible circuit board (120). The first end and the second end of the second reinforcing circuit board (150) opposite to each other are respectively attached to the mounting groove (112a) of the adjacent board segment (112) and electrically connected to the adjacent board segment (112). The side of the second reinforcing circuit board (150) away from the flexible circuit board (120) is flush with the side of the rigid circuit board (110) away from the flexible circuit board (120).

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