Battery protection board assembly, battery and electronic equipment

Abstract

The utility model discloses a battery protection board assembly, a battery and electronic equipment. The battery protection board assembly comprises a flexible circuit board and a connector, the flexible circuit board comprises a board main body and a battery protection chip, the board main body is provided with a first surface and a second surface which are opposite to each other, the battery protection chip is electrically connected to the first surface, the second surface is provided with a tab bonding pad, the tab bonding pad is used for being electrically connected with a tab of a battery cell, and the connector is arranged on the first surface or the second surface. The connector is used for being connected with a mainboard of the electronic equipment. The flexible circuit board is used as a mounting carrier, and the battery protection chip is integrated on the flexible circuit board, so that the number of stacked parts can be reduced, and the thickness of the battery protection board assembly can be effectively reduced and the volume of the battery protection board assembly can be reduced on the premise of realizing a battery protection function; therefore, more space can be vacated for arranging the battery cells, the capacity of the battery can be increased, and the miniaturization of the whole machine is facilitated at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery protection plate, and particularly relates to a battery protection plate assembly, a battery and an electronic device. BACKGROUND

[0002] At present, electronic devices such as mobile phones and tablet computers are mostly powered by batteries. With the rapid development of electronic devices, more and more functional modules are used, which leads to an increase in power consumption and a decrease in standby time. In order to improve the endurance of mobile terminals, increasing the battery capacity is one of the main ways.

[0003] The battery protection plate is generally integrated inside the battery. The battery protection plate can protect the battery during charging and discharging, and avoid problems such as overcharging, overdischarging and short circuit. In related technologies, the battery protection plate occupies a large space in the electronic device, and therefore, it is not conducive to increasing the battery capacity. At the same time, the battery protection plate is large in size, and is not conducive to the miniaturization of the whole machine. Utility model content

[0004] The present application discloses a battery protection plate assembly, a battery and an electronic device to solve the problem of a large space occupied by the battery protection plate in related technologies, which is not conducive to increasing the battery capacity.

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

[0006] In a first aspect, the embodiments of the present application disclose a battery protection plate assembly for electrically connecting with an electric core of a battery, the battery protection plate assembly comprising a flexible circuit board and a connector;

[0007] The flexible circuit board comprises a board main body and a battery protection chip, the board main body has a first surface and a second surface opposite to each other, the battery protection chip is electrically connected to the first surface, the second surface is provided with a tab pad, and the tab pad is used for electrically connecting with a tab of the electric core.

[0008] The connector is arranged on the first surface or the second surface.

[0009] In a second aspect, the embodiments of the present application disclose a battery, the disclosed battery comprising an electric core and the above-mentioned battery protection plate assembly, the battery protection plate assembly being electrically connected with a tab of the electric core through the tab pad.

[0010] In a third aspect, the embodiments of the present application disclose an electronic device, the disclosed electronic device comprising a device shell, a mainboard and the above-mentioned battery, the mainboard and the battery being both mounted in the device shell, and the connector of the battery protection plate assembly being electrically connected with the mainboard.

[0011] The technical solution adopted in this application can achieve the following technical effects:

[0012] The battery protection board assembly disclosed in this application improves upon related technologies. The assembly includes a flexible circuit board and a connector. The flexible circuit board includes a board body and a battery protection chip. The board body has a first surface and a second surface facing away from each other. The battery protection chip is electrically connected to the first surface, and the second surface has tab pads for electrical connection with the tabs of the battery cell. The connector is disposed on either the first or second surface and is used to connect to the motherboard of the electronic device. By using the flexible circuit board as a mounting carrier, the battery protection chip is integrated onto the flexible circuit board, eliminating the need for stacked rigid circuit boards. This reduces the number of stacked components and effectively reduces the thickness and volume of the battery protection board assembly while still providing battery protection. This frees up more space for battery cell placement, increasing battery capacity and facilitating overall miniaturization. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the battery protection board assembly disclosed in the embodiments of this application.

[0014] Explanation of reference numerals in the attached figures:

[0015] 100 - Flexible circuit board, 110 - Board body, 111 - First surface, 112 - Second surface, 120 - Battery protection chip, 130 - Electrode pad, 131 - First electrode pad, 132 - Second electrode pad, 140 - First component, 150 - Second component

[0016] 200-connector

[0017] 300-Encapsulation layer. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0019] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more.

[0020] The technical solutions disclosed in the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0021] A battery protection board protects the battery cell during charging and discharging to prevent it from being overcharged, over-discharged, overcurrented, short-circuited, or subjected to excessively high temperatures. In related technologies, the battery protection board includes a PCB (Printed Circuit Board) and an FPC (Flexible Printed Circuit). The PCB and FPC are stacked and soldered together, then installed together at a predetermined end of the battery cell. Because the combined thickness of the PCB and FPC is significant, it occupies considerable installation space for the battery cell, which is detrimental to increasing battery capacity.

[0022] Based on the above issues, please refer to Figure 1 This application discloses a battery protection board assembly for electrical connection with the battery cells. Specifically, the battery protection board assembly may include a flexible circuit board 100 (FPC) and a connector 200. The flexible circuit board 100 is a bend-resistant circuit board made of polyimide or polyester film as a substrate, characterized by high wiring density, light weight, and thin thickness.

[0023] The flexible circuit board 100 includes a board body 110 and a battery protection chip 120. The board body 110 is a mounting carrier for various components. The board body 110 has a first surface 111 and a second surface 112 that are opposite to each other. The battery protection chip 120 can be electrically connected to the first surface 111 by means of welding, conductive bonding or other methods.

[0024] The battery protection chip 120 can internally encapsulate multiple chips with different functions, forming a packaged system. Through these integrated chips, the battery protection chip 120 can protect the battery cell during charging and discharging, preventing it from being overcharged, over-discharged, overcurrent, short-circuited, or subjected to excessively high temperatures. Compared to a solution where the battery protection chip 120 is placed on a PCB and the PCB is then soldered onto an FPC, the solution presented in this application reduces the thickness of the battery protection board assembly, thereby reducing its space requirements. With the battery volume remaining constant, more space can be freed up for cell placement, thus increasing battery capacity by increasing energy density.

[0025] The second surface 112 of the board body 110 is provided with tab pads 130, which can be electrically connected to the tabs of the battery cell to conduct a circuit between the flexible circuit board 100 and the battery cell. The tab pads 130 and the tabs of the battery cell can be assembled by means of welding, conductive bonding, etc. The tab pads 130 may specifically include nickel sheets, which are connected to the second surface 112 of the board body 110 by solder, and the nickel sheets themselves can be electrically connected to the tabs of the battery cell.

[0026] When the battery is used to power the electronic device, the aforementioned flexible circuit board 100 also needs to be connected to the motherboard of the electronic device to achieve the corresponding functions. Specifically, a quick connection can be achieved through a connector 200, which can be disposed on either the first surface 111 or the second surface 112 of the board body 110. The connector 200 can be inserted into an interface on the motherboard via a plug-in method, thereby enabling the flexible circuit board 100 to be electrically connected to the motherboard.

[0027] As described above, the battery protection board assembly disclosed in this application improves upon related technologies by using a flexible circuit board 100 as a mounting carrier to integrate the battery protection chip 120 onto the flexible circuit board 100. This eliminates the need to stack rigid circuit boards, reducing the number of stacked components. While still providing battery protection, the thickness and volume of the battery protection board assembly can be effectively reduced, freeing up more space for battery cell placement and increasing battery capacity. This also contributes to the miniaturization of the entire device.

[0028] like Figure 1As shown, the aforementioned battery protection board assembly also includes an encapsulation layer 300. The encapsulation layer 300 can cover a portion of the flexible circuit board 100 to encapsulate the surface of the flexible circuit board 100 and its components, thereby improving the structural strength and reliability of the battery protection board assembly, and also enhancing its dustproof and waterproof performance. The encapsulation layer 300 can be formed using an injection molding process, and the materials used can be polyethylene, polypropylene, polystyrene, etc.

[0029] In one optional embodiment of this application, such as Figure 1 As shown, considering that the battery protection chip 120 and various components are all located on the first surface 111 of the board body 110, while the second surface 112 of the board body 110 is only provided with tab pads 130, the encapsulation layer 300 can only cover the first surface 111, which can protect the components located on the first surface 111 and reduce the weight and thickness of the battery protection board assembly.

[0030] To further reduce the weight of the battery protection board assembly, such as Figure 1 As shown, the encapsulation layer 300 can only cover the area on the first surface 111 where the battery protection chip 120 is located, and other areas on the board body 110 do not need to be encapsulated.

[0031] like Figure 1 As shown, the flexible circuit board 100 may further include a first component 140 and a second component 150. The first component 140 and the second component 150 are electrically connected to the first surface 111 of the board body 110, and the specific electrical connection method may include welding, conductive bonding, etc. For example, the first component 140 may be an RLC series circuit composed of a resistor, a capacitor, and an inductor, and the second component 150 may be a MOSFET. The encapsulation layer 300 may cover the area on the first surface 111 of the board body 110 where the battery protection chip 120, the first component 140, and the second component 150 are located, thereby protecting the aforementioned components.

[0032] like Figure 1 As shown, the flexible circuit board 100 is electrically connected to the tabs of the battery cell via tab pads 130. The tab pads 130 may include a first tab pad 131 and a second tab pad 132 spaced apart. Correspondingly, the battery cell has a first tab and a second tab spaced apart. The first tab pad 131 is configured to be electrically connected to the first tab, and the second tab pad 132 is configured to be electrically connected to the second tab. Specific electrical connection methods may include soldering, conductive bonding, etc. The first tab can be a positive tab, and correspondingly, the first tab pad 131 is a positive tab pad 130. The second tab can be a negative tab, and correspondingly, the second tab pad 132 is a negative tab pad 130.

[0033] To facilitate the insertion and assembly of connector 200 with the motherboard of electronic equipment, such as Figure 1 As shown, the connector 200 can be disposed on the first surface 111 and near the preset end of the board body 110. When the flexible circuit board 100 is installed inside the electronic device, the preset end can be the end of the board body 110 near the motherboard of the electronic device, thereby shortening the wiring length between the flexible circuit board 100 and the electronic device and further saving the internal space of the electronic device.

[0034] This application also discloses a battery, which includes a battery cell and the aforementioned battery protection board assembly. The battery protection board assembly can be electrically connected to the tabs of the battery cell via tab solder pads 130.

[0035] As described above, the battery protection board assembly disclosed in this application improves upon related technologies. The battery protection board assembly includes a flexible circuit board 100 and a connector 200. The flexible circuit board 100 includes a board body 110 and a battery protection chip 120. The board body 110 has a first surface 111 and a second surface 112 facing away from each other. The battery protection chip 120 is electrically connected to the first surface 111. The second surface 112 is provided with tab pads 130, which are used for electrical connection with the tabs of the battery cell. The connector 200 is disposed on the first surface 111 or the second surface 112 and is used for connection to the motherboard of an electronic device. By using the flexible circuit board 100 as a mounting carrier, the battery protection chip 120 is integrated on the flexible circuit board 100, eliminating the need to stack rigid circuit boards. This reduces the number of stacked components and effectively reduces the thickness and volume of the battery protection board assembly while still protecting the battery. This frees up more space for battery cells, thereby increasing battery capacity and also contributing to the miniaturization of the entire device.

[0036] This application also discloses an electronic device, which may include battery-powered electronic products such as mobile phones, tablets, televisions, smart wearable products (e.g., smartwatches, smart bracelets), virtual reality terminal devices, and augmented reality terminal devices. The aforementioned electronic devices may also be rechargeable small household appliances (e.g., soymilk makers, robot vacuum cleaners), drones, and other electronic products. This application does not impose any special limitations on the specific form of the aforementioned electronic device.

[0037] The aforementioned electronic device may include a device housing, a motherboard, and the aforementioned battery. Both the motherboard and the battery are installed in the device housing, and the connector 200 of the battery protection board assembly is electrically connected to the motherboard.

[0038] As described above, the battery protection board assembly disclosed in this application improves upon related technologies. The battery protection board assembly includes a flexible circuit board 100 and a connector 200. The flexible circuit board 100 includes a board body 110 and a battery protection chip 120. The board body 110 has a first surface 111 and a second surface 112 facing away from each other. The battery protection chip 120 is electrically connected to the first surface 111. The second surface 112 is provided with tab pads 130, which are used for electrical connection with the tabs of the battery cell. The connector 200 is disposed on the first surface 111 or the second surface 112 and is used for connection to the motherboard of an electronic device. By using the flexible circuit board 100 as a mounting carrier, the battery protection chip 120 is integrated on the flexible circuit board 100, eliminating the need to stack rigid circuit boards. This reduces the number of stacked components and effectively reduces the thickness and volume of the battery protection board assembly while still protecting the battery. This frees up more space for battery cells, thereby increasing battery capacity and also contributing to the miniaturization of the entire device.

[0039] The above embodiments of this application focus on describing the differences between the various embodiments. As long as the different technical features between the various embodiments are not contradictory, they can be combined to form more specific embodiments. For the sake of brevity, they will not be described in detail here.

[0040] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A battery protection plate assembly for electrical connection with a cell of a battery, characterized in that, The battery protection plate assembly comprises a flexible circuit board (100) and a connector (200); The flexible circuit board (100) comprises a plate body (110) and a battery protection chip (120), the plate body (110) has a first surface (111) and a second surface (112) opposite to each other, the battery protection chip (120) is electrically connected to the first surface (111), and the second surface (112) is provided with a tab pad (130) for electrically connecting with a tab of the battery cell. The connector (200) is arranged on the first surface (111) or the second surface (112).

2. The battery protection plate assembly of claim 1, wherein, The battery protection plate assembly further comprises an encapsulation layer (300) covering part of the flexible circuit board (100).

3. The battery protection plate assembly of claim 2, wherein, The encapsulation layer (300) covers the first surface (111).

4. The battery protection plate assembly of claim 3, wherein, The encapsulation layer (300) covers the region of the first surface (111) provided with the battery protection chip (120).

5. The battery protection plate assembly of claim 3, wherein, The flexible circuit board (100) further comprises a first component (140) and a second component (150), and the first component (140) and the second component (150) are electrically connected to the first surface (111), respectively. The encapsulation layer (300) covers the region of the first surface (111) provided with the battery protection chip (120), the first component (140) and the second component (150).

6. The battery protection plate assembly of claim 1, wherein, The tab pad (130) comprises a first tab pad (131) and a second tab pad (132) arranged at intervals, and the battery cell has a first tab and a second tab arranged at intervals; The first tab pad (131) is configured to be electrically connected to the first tab, and the second tab pad (132) is configured to be electrically connected to the second tab.

7. The battery protection plate assembly of claim 6, wherein, The first tab is a positive tab, and the first tab pad (131) is a positive tab pad (130). The second tab is a negative tab, and the second tab pad (132) is a negative tab pad (130).

8. The battery protection plate assembly of claim 1, wherein, The connector (200) is arranged on the first surface (111) and close to a preset end of the plate body (110).

9. A battery, characterized by The battery protection plate assembly of any one of claims 1-8 is electrically connected to the tab of the battery cell through the tab pad (130).

10. An electronic device, comprising: The battery of claim 9 is installed in the device housing together with a mainboard, and the connector (200) of the battery protection plate assembly is electrically connected to the mainboard.

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