Battery protection board, battery and electronic equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery protection board, a battery and electronic equipment. The battery protection board comprises a main board, an extension board, a connector and a device module, the mainboard is used for being arranged at one end, in the length direction of a tab, of a battery cell and electrically connected with the tab of the battery cell, the extension plate is connected with the mainboard, the projection of the extension plate and the projection of the battery cell in the length direction of the battery cell are not overlapped, and the connector is arranged on the extension plate and used for being electrically connected with external equipment; and the device module is also arranged on the extension plate, and the connector is electrically connected with the battery cell through the device module, so that charging and discharging of the battery cell are protected by utilizing the device module. The device module is arranged on the extension plate, so that the size of the mainboard can be effectively reduced, and meanwhile, the extension plate is not overlapped with the projection of the battery cell in the length direction of the battery cell, so that the space occupied by one end, in the length direction of the battery, of the battery protection plate is reduced, the energy density of the battery is improved to a certain extent, and the service life of the battery is prolonged. And a space is provided for capacity increasing of the battery cell.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery protection board, a battery, and an electronic device. Background Technology

[0002] The protection board is a crucial component of a battery. Its primary function is to monitor the battery's operating status and prevent abnormal conditions such as overcharging, over-discharging, and short circuits, thereby protecting the battery's safe and reliable operation and extending its lifespan. Current protection boards typically consist of a connected base plate and a flexible circuit board. The base plate is used for electrical connection to the battery cell's tabs at the top, while the flexible circuit board uses connectors to electrically connect to external devices (such as the motherboard of an electronic device). Protection boards usually also include various devices for protecting the battery cell during charging and discharging. However, these protective devices are mainly located on the base plate, occupying a significant amount of space on top of the battery cell and affecting the battery's energy density. Utility Model Content

[0003] The purpose of this invention is to provide a battery protection board, a battery, and an electronic device to improve battery energy density to a certain extent.

[0004] The first aspect of this utility model provides a battery protection board, including a main board, an extension board, a connector, and a device module;

[0005] The main board is located at one end of the battery cell along its length and is electrically connected to the tab of the battery cell. The extension board is connected to the main board, and the projection of the extension board onto the battery cell along its length does not overlap. The connector and the device module are both located on the extension board.

[0006] Furthermore, the motherboard and the extension board are integrally formed on the same FPC flexible board, and the thickness d of the FPC flexible board satisfies: 0.18mm≤d≤0.60mm.

[0007] Furthermore, the length 'a' of the extension plate satisfies 8mm ≤ a ≤ 30mm.

[0008] Furthermore, the width b of the extension plate satisfies 5mm ≤ b ≤ 15mm.

[0009] Furthermore, the main board and the extension board are arranged in parallel, and the main board is arranged perpendicularly to the top end face of the battery cell with tabs.

[0010] Furthermore, the main board is folded relative to the extension plate, so that the main board is perpendicular to the extension plate, and the main board is arranged parallel to the top end face of the battery cell with tabs.

[0011] Furthermore, at least one end of the motherboard in the length direction is provided with the extension plate. When both ends of the motherboard in the length direction are provided with the extension plate, the connector is provided on the extension plate at at least one end.

[0012] Furthermore, when the motherboard has extension plates at both ends along its length, at least one of the extension plates has the device module.

[0013] The second aspect of this utility model provides a battery, including a battery cell and a battery protection board as described in any one of the above claims;

[0014] The battery cell includes a battery cell body and a packaging bag. The packaging bag is wrapped around the outside of the battery cell body. One end of the battery cell body along its length is the top end of the battery cell body where the electrode tab is located. The packaging bag forms a top sealing edge at the top end of the battery cell body, and the top sealing edge is folded to be in contact with the end face of the top end of the battery cell.

[0015] The third aspect of this utility model provides an electronic device, including the battery described above.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The battery protection board provided by this utility model includes a main board, an extension board, a connector, and a device module. The main board is located at the end of the battery cell with tabs along its length and is electrically connected to the tabs of the battery cell. The extension board is connected to the main board, and the projection of the extension board and the battery cell along the length of the battery cell does not overlap. The connector is located on the extension board and is used to insert into the connector interface of an external device, so that the battery cell can be electrically connected to the external device through the battery protection board to realize the charging and discharging of the battery cell. The device module is an integrated module of various devices on the battery protection board used to protect the charging and discharging of the battery cell. The device module is also located on the extension board, and the connector is electrically connected to the battery cell through the device module, so as to use the device module to monitor the working status of the battery during charging, discharging, and overcharging, and prevent abnormal conditions such as overcharging, over-discharging, and short circuits.

[0018] Compared to the approach of placing various components in the device module on the motherboard, this application integrates various components into a device module and places it on the extension board, which can effectively reduce the size of the motherboard. At the same time, this application ensures that the projection of the extension board and the cell in the length direction of the cell does not overlap, which can effectively reduce the space occupied by the battery protection board in the length direction of the battery, thereby improving the battery energy density to a certain extent and providing space for cell capacity expansion.

[0019] This utility model also provides a battery and an electronic device including the battery. Since the battery includes the battery protection board, both the battery and the electronic device have the beneficial effects of the battery protection board. Attached Figure Description

[0020] 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.

[0021] Figure 1 A schematic diagram of the structure of a battery protection board provided in an embodiment of this utility model;

[0022] Figure 2 Another structural schematic diagram of the battery protection board provided in this embodiment of the utility model;

[0023] Figure 3 A schematic diagram of another structure of the battery protection board provided in an embodiment of this utility model;

[0024] Figure 4 This is another structural schematic diagram of the battery protection board provided in an embodiment of the present utility model.

[0025] Figure label:

[0026] 1-Main board, 2-Extension board, 21-Connector, 22-Component module, 3-Battery cell. Detailed Implementation

[0027] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0028] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0029] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The following reference Figures 1 to 4 This application describes a battery protection board, battery, and electronic device according to some embodiments.

[0033] The first aspect of this application provides a battery protection board.

[0034] like Figure 1 As shown, the battery protection board includes a main board 1, an extension board 2, a connector 21, and a device module 22.

[0035] The main board 1 is located at one end of the battery cell 3 along its length and is electrically connected to the tabs of the battery cell 3. Specifically, the end of the battery cell 3 with tabs is the top end of the battery cell 3. The top end of the battery cell 3 is provided with multiple tabs at intervals along the width direction of the battery cell 3. The length direction of the main board 1 extends along the width direction of the battery cell 3. The main board 1 is provided with multiple solder pads. The multiple solder pads are soldered to the multiple tabs of the battery cell 3 one by one, so that the multiple tabs of the battery cell 3 are electrically connected to the main board 1.

[0036] The extension board 2 is connected to the main board 1, and the projections of the extension board 2 and the battery cell 3 in the length direction of the battery cell 3 do not overlap. The connector 21 is disposed on the extension board 2 and is electrically connected to the solder pads on the main board 1. The connector 21 is used to insert into the connector interface of an external device so that the battery cell 3 can be electrically connected to the external device through the battery protection board to realize the charging and discharging of the battery cell 3.

[0037] Device module 22 is an integrated module of various devices on the battery protection board used to protect the charging and discharging of cell 3. For example, the protection devices in device module 22 include, but are not limited to, gauge (fuel gauge), encryption chip, lithium protection chip, MOSFET (metal oxide semiconductor field effect transistor), fuse, PTC (positive temperature coefficient thermistor) and NTC (negative temperature coefficient thermistor), etc.

[0038] The device module 22 is also located on the extension board 2, and the connector 21 is electrically connected to the pads on the main board 1 through the device module 22, so as to use the device module 22 to monitor the working status of the battery during charging, discharging and overcharging, and prevent abnormal situations such as overcharging, over-discharging and short circuit of the battery.

[0039] Compared to the solution of placing various components in the component module 22 on the motherboard 1, this application integrates various components into the component module 22 and places it on the extension board 2, which can effectively reduce the size of the motherboard 1. At the same time, this application ensures that the projection of the extension board 2 and the battery cell 3 in the length direction of the battery cell 3 does not overlap, which can effectively reduce the space occupied by the battery protection board in the length direction of the battery, thereby improving the battery energy density to a certain extent and providing space for increasing the capacity of the battery cell 3.

[0040] In this embodiment, the encapsulation structure of the device module 22 on the extension plate 2 can be injection molded using PUR (reactive polyurethane), UV (ultraviolet curable) or PA (polyamide) adhesives; alternatively, it can be 3D printed or EMC (epoxy molding compound) injection molded; or it can be formed using conventional surface mount, coating, or SIP module surface mount methods, so that the device module 22 fits the reserved space in the electronic device, thereby further reducing the overall length of the battery, increasing the energy density of the cell 3, and reserving space for increasing the capacity of the cell 3.

[0041] In one embodiment of this application, preferably, the main board 1 and the extension board 2 are integrally formed on the same FPC flexible board, and the thickness d of the FPC flexible board satisfies 0.18mm≤d≤0.60mm; for example, d is 0.2mm, 0.3mm, 0.4mm or 0.5mm. This allows the protection board to have a thinner thickness, especially in the area of ​​the main board 1, so as to reduce the space occupied on the top of the battery cell 3 to a certain extent.

[0042] Preferably, at the top of the battery cell 3, the extension plate 2 extends along the length direction of the battery cell 3 and along the width direction of the battery cell 3. The extension plate 2 has a length a and a width b, where the length a satisfies: 8mm ≤ a ≤ 30mm, for example, a is 10mm, 15mm, 20mm, or 25mm; and the width b satisfies: 5mm ≤ b ≤ 15mm, for example, b is 8mm, 10mm, 12mm, or 13mm. This provides sufficient space on the extension plate 2 to accommodate the device module 22 and the connector 21.

[0043] In one embodiment of this application, preferably, as shown below, Figure 1 and Figure 2 As shown, the main board 1 and the extension board 2 are arranged in parallel, that is, the surfaces of the main board 1 and the extension board 2 are parallel to each other; when located at the top of the battery cell 3, the top surfaces of the main board 1 and the battery cell 3 are arranged perpendicularly; or, as shown... Figure 3 and Figure 4 As shown, the main board 1 is bent relative to the extension board 2 so that the surface of the main board 1 and the surface of the extension board 2 are perpendicular to each other. When the top of the battery cell 3 is provided, the top surface of the main board 1 and the top surface of the battery cell 3 are set parallel to each other. At this time, the space occupied by the battery protection board at the top of the battery cell 3 can be effectively reduced. Compared with the traditional battery protection board structure, the length of the battery cell 3 can be increased by at least 2mm to 4.3mm, thereby greatly improving the battery energy density.

[0044] In one embodiment of this application, preferably, at least one end of the motherboard 1 along its length is formed with an extension plate 2, for example, as shown in the example. Figure 1 and Figure 3 As shown, an extension plate 2 is formed at one end of the motherboard 1 along its length. For example, as... Figure 2 and Figure 4 As shown, extension plates 2 are formed at both ends of the motherboard 1 along its length. When extension plates 2 are formed at both ends of the motherboard 1 along its length, at least one of the extension plates 2 is provided with a connector. More preferably, when extension plates 2 are formed at both ends of the motherboard 1 along its length, at least one of the two extension plates 2 is provided with a device module 22. When extension plates 2 are provided at both ends of the motherboard 1, and connectors 21 are provided on both extension plates 2, electrical connection with external devices can be achieved through the two connectors 21, thereby solving the problem of high current-carrying internal resistance.

[0045] A second aspect of this application provides a battery that includes the battery protection board of any of the above embodiments. Since the battery includes the battery protection board, it possesses all the beneficial effects of the battery protection board, which will not be elaborated further here.

[0046] In this embodiment, the battery also includes a cell 3, which includes a cell body and a packaging bag. The packaging bag is wrapped around the outside of the cell body. One end of the cell body in the length direction is the top of the cell body. The packaging bag forms a top sealing edge at the top of the cell body, and the top sealing edge is folded to fit against the end face of the top of the cell body, thereby reducing the length of the cell 3 to a certain extent, increasing the energy density of the cell 3, and reserving space for the expansion of the cell 3.

[0047] Meanwhile, the top of the cell body is provided with a tab, the battery protection board is located at the top of the cell body and is electrically connected to the tab of the cell body via the main board 1, and the extension plate 2 with connector 21 and device module 22 does not overlap with the projection of the cell 3 (including the cell body and packaging bag) in the length direction of the cell 3, thereby effectively reducing the space occupied by the battery protection board in the length direction of the battery, so as to improve the energy density of the battery to a certain extent and provide space for the capacity increase of the cell 3.

[0048] A third aspect of this application provides an electronic device that includes the battery described in the above embodiments. Since the electronic device includes a battery, it has all the beneficial effects of a battery, which will not be repeated here.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery protection plate, characterized in that, The battery protection plate comprises a main plate, an extension plate, a connector and a device module. The main plate is arranged at one end of the battery cell in the length direction and is electrically connected with the tab of the battery cell.

2. The battery protection plate of claim 1, wherein, The thickness d of the FPC soft plate satisfies 0.18mm≤d≤0.60mm.

3. The battery protection plate of claim 1, wherein, The length a of the extension plate satisfies 8mm≤a≤30mm.

4. The battery protection plate of claim 1, wherein, The width b of the extension plate satisfies 5mm≤b≤15mm.

5. The battery protection plate of claim 1, wherein, The main plate and the extension plate are arranged in parallel, and the main plate is arranged perpendicularly to the top end surface of the battery cell with a tab.

6. The battery protection plate of claim 1, wherein, The main plate is folded relative to the extension plate, so that the main plate and the extension plate are arranged perpendicularly, and the main plate is arranged in parallel to the top end surface of the battery cell with a tab.

7. The battery protection plate of claim 1, wherein, At least one end of the main plate in the length direction is provided with the extension plate.

8. The battery protection plate of claim 7, wherein, When both ends of the main plate in the length direction are provided with the extension plate, the connector is arranged on at least one of the extension plates.

9. A battery, characterized by When both ends of the main plate in the length direction are provided with the extension plate, the device module is arranged on at least one of the extension plates. The battery comprises a battery cell and the battery protection plate according to any one of claims 1 to 8.

10. An electronic device, comprising: The battery cell comprises a battery cell body and a packaging bag, the packaging bag is wrapped outside the battery cell body, one end of the battery cell body in the length direction is the top end of the battery cell body provided with a tab, the packaging bag is provided with a top sealing edge at the top end of the battery cell body, and the top sealing edge is folded to be attached to the end surface of the top end of the battery cell. The battery comprises the battery protection plate according to claim 9.

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