Protective plate, battery and electric appliance

Abstract

The utility model relates to the field of battery discloses protection board, battery and electric appliance. Among them, protection board includes: board body, board body has first surface and lateral wall surface, first surface is used for to the battery, lateral wall surface is established at the edge of first surface, and lateral wall surface and first surface intersect, electrically conductive connecting piece, the number of electrically conductive connecting piece is at least two, at least two electrically conductive connecting pieces are connected with lateral wall surface, and the outer surface of electrically conductive connecting piece is used for connecting with the pole lug of battery and deviates from lateral wall surface. The electrically conductive connecting piece is changed to connect in the lateral wall surface of board body, no longer occupies the first surface space of board body to the battery, allows the first surface of protection board to be closer to the battery surface to reduce the spacing requirement between protection board and battery, greatly compresses the installation space between protection board and battery, improves the internal space utilization of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to protection boards, batteries, and electrical appliances. Background Technology

[0002] In a battery system, the battery protection board plays a crucial role, protecting the battery from overcharging, over-discharging, and overcurrent to ensure its safe use.

[0003] Currently, common battery protection boards are usually located at the end of the battery. A nickel sheet, designed with a bent structure, is placed on the surface of the battery protection board. One part of the nickel sheet is connected to the battery protection board, while another part extends towards the battery and connects to the battery's terminals. This connection method achieves the electrical connection between the battery protection board and the battery.

[0004] However, because a nickel plate is placed between the battery protection board and the battery, a large gap needs to be reserved between the battery protection board and the battery to accommodate the nickel plate, which encroaches on the usable space of the battery and affects the increase of battery capacity. Utility Model Content

[0005] In view of this, the present invention provides a protection board, a battery and an electrical appliance to solve or improve the problem in the related art that a large gap needs to be reserved between the protection board and the battery.

[0006] In a first aspect, this utility model provides a protection board for a battery, comprising:

[0007] The plate has a first surface and a side wall, the first surface being oriented toward the battery, and the side wall being disposed at the edge of the first surface and intersecting the first surface;

[0008] A conductive connector, wherein the number of the conductive connectors is at least two, and both of the conductive connectors are connected to the side wall surface, and the outer surface of the conductive connectors facing away from the side wall surface is used to connect to the tabs of the battery.

[0009] In one optional embodiment, the opposite edges of the first surface are provided with sidewalls, and each sidewall is connected to a corresponding conductive connector.

[0010] In one optional embodiment, the plate is configured as a strip structure extending along a first direction, the first surface having two long sides extending along the first direction, the two long sides being arranged opposite to each other and each having a corresponding sidewall surface, and each sidewall surface being connected to a corresponding conductive connector.

[0011] In one optional embodiment, the plate body further has a second surface disposed opposite to the first surface, the conductive connector includes a main body and a first flange, the main body is connected to the side wall surface, the first flange is connected to the end of the main body near the second surface and folded toward the side of the main body near the plate body, and the first flange is connected to the second surface.

[0012] In one optional embodiment, the conductive connector includes a body and a first flange. The body is connected to the side wall surface, and the first flange is connected to the end of the body near the first surface and folded toward the side of the body near the plate. The first flange is connected to the first surface.

[0013] In one optional embodiment, the plate body further has a second surface disposed opposite to the first surface, and the conductive connector includes a main body, a first flange, and a second flange.

[0014] The main body is connected to the side wall surface. The first flange is connected to the end of the main body near the second surface and folds towards the side of the main body near the plate. The first flange is connected to the second surface. The second flange is connected to the end of the main body near the first surface and folds towards the side of the main body near the plate. The second flange is connected to the first surface.

[0015] In one alternative embodiment, the plate body is provided with pads, and the conductive connector is welded to the pads.

[0016] Secondly, this utility model also provides a battery, including the protection plate as described above, wherein one end of the battery is provided with a positive electrode tab and a negative electrode tab, and both the positive electrode tab and the negative electrode tab are connected to the corresponding conductive connector.

[0017] In one optional embodiment, the positive electrode tab and the negative electrode tab are arranged opposite to each other and spaced apart, and the protective plate is disposed between the positive electrode tab and the negative electrode tab;

[0018] The first surface has sidewalls on both opposite edges, and the sidewalls on both sides are respectively positioned opposite to the positive electrode tab and the negative electrode tab. Each sidewall is connected to a corresponding conductive connector.

[0019] Thirdly, this utility model also provides an electrical appliance, including the protection board as described above or the battery as described above.

[0020] The protection board provided by this utility model replaces the conductive connector with one connected to the side wall of the board body, no longer occupying the space of the first surface of the board body facing the battery. This allows the first surface of the protection board to be closer to the battery surface, thereby reducing the spacing requirement between the protection board and the battery, significantly compressing the installation space between the protection board and the battery, and improving the utilization rate of the battery's internal space.

[0021] The battery and electrical appliance provided by this utility model include all the advantages of the protection board mentioned above. Attached Figure Description

[0022] 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.

[0023] Figure 1 A side view of a battery provided for an embodiment of this utility model;

[0024] Figure 2 A schematic diagram of the structure of a protective plate provided in an embodiment of this utility model;

[0025] Figure 3 for Figure 2 A magnified view of part A in the diagram;

[0026] Figure 4 This is a schematic diagram of a protective plate connected to a tab, provided in an embodiment of the present invention.

[0027] Figure 5 A schematic diagram of another structure for connecting a protective plate to a tab provided in an embodiment of this utility model;

[0028] Figure 6 A schematic diagram of the structure of a protective plate provided in an embodiment of this utility model;

[0029] Figure 7 This is a schematic diagram of the structure of a conductive connector provided in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Plate body; 101. First surface; 1011. Long side; 102. Second surface; 103. Side wall; 104. Solder pad; 2. Battery; 201. Positive electrode tab; 202. Negative electrode tab; 3. Conductive connector; 301. Main body; 302. First flange; 303. Second flange; X. First direction; Y. Second direction; Z. Third direction. Detailed Implementation

[0032] 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.

[0033] Currently, common battery protection boards are usually located at the end of the battery. A nickel sheet, designed with a bent structure, is placed on the surface of the battery protection board. One part of the nickel sheet is connected to the battery protection board, while another part extends towards the battery and connects to the battery's terminals. This connection method achieves the electrical connection between the battery protection board and the battery.

[0034] However, because a nickel plate is placed between the battery protection board and the battery, a relatively large distance needs to be reserved between the battery protection board and the battery to accommodate the nickel plate, which encroaches on the usable space of the battery and affects the increase of battery capacity.

[0035] To address or improve the problem of requiring a large gap between the protection board and the battery in related technologies, this utility model provides a protection board, a battery, and an electrical appliance.

[0036] The following is combined Figures 1 to 7 This describes the protective plate provided in the embodiments of the present invention.

[0037] Specifically, the protection board is used for battery 2, and the protection board includes a board body 1 and conductive connectors 3.

[0038] The board 1 can be a printed circuit board (PCB). Board 1 has a first surface 101 and sidewalls 103, the first surface 101 facing the battery 2. For example, refer to... Figure 1 As shown in the figure, the battery 2 has a plate 1 at the top of the main body 301 of the battery 2, and the lower surface of the plate 1 is the first surface 101.

[0039] The sidewall 103 of the plate 1 is disposed at the edge of the first surface 101, and the sidewall 103 intersects with the first surface 101. For example, refer to Figure 1 As shown in the figure, the first surface 101 is a horizontal plane, the side wall surface 103 is a vertical plane, and the first surface 101 intersects with the side wall surface 103.

[0040] The number of conductive connectors 3 is at least two. For example, the conductive connectors 3 can be metal sheets, including but not limited to nickel sheets, copper sheets, and aluminum sheets. At least two conductive connectors 3 are connected to the side wall surface 103. For example, the conductive connectors 3 can be welded, bonded, or riveted to the side wall surface 103 of the plate body 1. The outer surface of the conductive connector 3 facing away from the side wall surface 103 is used to connect to the tabs of the battery 2; that is, the surface of the conductive connector 3 facing away from the side wall surface 103 is set as the connection surface for connecting to the tabs.

[0041] In traditional designs, the nickel sheet needs to be bent vertically from the surface of the protection board to the battery's second electrode tab, necessitating a bendable space between the protection board and the battery. (Reference) Figure 1 In this application, the conductive connector 3 is changed to be connected to the side wall 103 of the plate body 1, and no longer occupies the space of the first surface 101 of the plate body 1 facing the battery 2. This allows the first surface 101 of the protection board to be closer to the surface of the battery 2, thereby reducing the spacing requirement between the protection board and the battery 2, greatly compressing the installation space between the protection board and the battery 2, and improving the utilization rate of the internal space of the battery 2.

[0042] Furthermore, the lateral connection method provided in this application allows the protection board to be closer to the surface of the battery 2 (or even flush with it), improving the compactness of the battery 2, which is especially suitable for scenarios with high energy density requirements, such as consumer electronics or electric vehicles.

[0043] refer to Figure 1 , Figure 2 and Figure 6 As shown, in some embodiments of this utility model, the opposite edges of the first surface 101 are provided with sidewalls 103, and each sidewall 103 is connected to a corresponding conductive connector 3. Optionally, the figure shows two conductive connectors 3 respectively disposed on two sidewalls 103.

[0044] In related technologies, the conductive connector 3 is concentrated on one side of the plate 1. Due to the limited edge size of the plate 1, the size of the connector along the edge of the plate 1 is often compressed.

[0045] In this embodiment, conductive connectors 3 are respectively provided on two opposite sidewalls 103, and the conductive connectors on each sidewall 103 can be designed with independent dimensions. For example, the dimensions of the conductive connectors 3 along the edge of the plate 1 can be increased. When the dimensions of the conductive connectors 3 increase, the cross-sectional area increases accordingly, thereby carrying a larger current, reducing heat loss during conduction, and improving the charging and discharging efficiency of the battery 2. It should be noted that the edge of the plate 1 mentioned in this embodiment refers to the edge of the plate 1 where the sidewalls 103 are located.

[0046] In addition, by providing conductive connectors 3 on two opposite sidewalls 103 respectively, the spacing between the conductive connectors 3 on the two sidewalls 103 is relatively large, which can improve the heat dissipation effect of the conductive connectors 3 and reduce the heat radiation effect between the conductive connectors 3, so that the conductive connectors 3 on both sidewalls 103 have good heat dissipation effect.

[0047] In some embodiments provided by this utility model, the plate body 1 is configured as a strip structure extending along the first direction X, and the first surface 101 has two long sides 1011 extending along the first direction X. The two long sides 1011 are arranged opposite to each other and each has a corresponding side wall surface 103.

[0048] For example, the first surface 101 has a long side 1011 extending along the first direction X and a short side extending along the second direction Y. The first surface 101 faces or is away from the third direction Z. The first direction X, the second direction Y and the third direction Z intersect each other, for example, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0049] In this embodiment, most of the batteries 2 (such as square lithium batteries) have narrow and long ends. The strip-shaped plate 1 can fit better with the battery 2, avoiding space waste caused by excessive width.

[0050] Both of the two opposing long sides 1011 are provided with sidewalls 103, and each sidewall 103 can be connected to a conductive connector 3, so that the two long sides 1011 become the main connection area, which can provide a longer contact edge. For example, the size of the conductive connector 3 along the first direction X can be increased, thereby significantly improving the current-carrying cross-sectional area of ​​the conductive connector 3.

[0051] refer to Figures 1-3 As shown, in some embodiments provided by this utility model, the plate 1 further has a second surface 102 disposed opposite to the first surface 101, or, referring to... Figure 2 As shown, the plate 1 has a first surface 101 and a second surface 102 disposed opposite to each other in the third direction Z, where the third direction Z is the thickness direction of the plate 1.

[0052] Furthermore, the conductive connector 3 includes a main body 301 and a first flange 302. The main body 301 is connected to the side wall 103, and the first flange 302 is connected to the end of the main body 301 near the second surface 102, and folds towards the side of the main body 301 near the plate 1, where it is connected to the second surface 102. It is understood that the outer surface of the main body 301 facing away from the side wall 103 is used to connect the electrode tab. The main body 301 and the first flange 302 can be configured as an integrally formed structure.

[0053] In this embodiment, the first flange 302 extends from the main body 301 and folds to the second surface 102, forming an additional fixing point. It connects to the conductive connector 3 at two points: the side wall 103 and the first surface 101. This significantly improves the connection strength between the conductive connector 3 and the plate 1, preventing warping or breakage of the conductive connector 3 due to vibration or thermal expansion and contraction of the battery 2. Simultaneously, the first flange 302 occupies only a limited space on the side of the plate 1 away from the battery 2, eliminating the need to increase the distance between the protective plate and the battery 2.

[0054] Of course, the plate 1 is not limited to being connected to the second surface 102 via the first flange 302, for example, referring to Figure 4 As shown, in other embodiments provided by this utility model, the conductive connector 3 includes a main body 301 and a first flange 302.

[0055] Specifically, the main body 301 is connected to the side wall 103, and the first flange 302 is connected to the end of the main body 301 near the first surface 101, and folds towards the side of the main body 301 near the plate 1, with the first flange 302 connected to the first surface 101. It can be understood that the outer surface of the main body 301 facing away from the side wall 103 is used to connect the electrode tab. The main body 301 and the first flange 302 can be configured as an integrally formed structure.

[0056] In this embodiment, the first flange 302 extends from the main body 301 and folds to the first surface 101 to form an additional fixing point. It is connected to the conductive connector 3 at two points, the side wall 103 and the first surface 101, which can significantly improve the connection strength between the conductive connector 3 and the plate 1 and prevent the conductive connector 3 from warping or breaking due to vibration of the battery 2 or thermal expansion and contraction.

[0057] Furthermore, the conductive connector 3 is not limited to being connected only to the first surface 101 or the second surface 102, for example, referring to Figure 5 As shown, in other embodiments provided by this utility model, the plate 1 further has a second surface 102 disposed opposite to the first surface 101, or, referring to... Figure 2 As shown, the plate 1 has a first surface 101 and a second surface 102 disposed opposite to each other in the third direction Z, where the third direction Z is the thickness direction of the plate 1.

[0058] Furthermore, the conductive connector 3 includes a main body 301, a first flange 302, and a second flange 303.

[0059] Specifically, the main body 301 is connected to the side wall 103, the first flange 302 is connected to the end of the main body 301 near the second surface 102, and is folded towards the side of the main body 301 near the plate 1, and the first flange 302 is connected to the second surface 102.

[0060] The second flange 303 is connected to the end of the main body 301 near the first surface 101, and is folded towards the side of the main body 301 near the plate 1, with the second flange 303 connected to the first surface 101. It can be understood that the outer surface of the main body 301 facing away from the side wall 103 is used to connect the electrode tabs. The main body 301, the first flange 302, and the second flange 303 can be configured as an integrally formed structure.

[0061] In this embodiment, the first flange 302 extends from the main body 301 and folds to the second surface 102, and the second flange 303 extends from the main body 301 to the first surface 101, forming additional fixing points. That is, it is connected to the conductive connector 3 at three points through the side wall surface 103, the first surface 101 and the second surface 102, which can significantly improve the connection strength between the conductive connector 3 and the plate 1 and prevent the conductive connector 3 from warping or breaking due to vibration of the battery 2 or thermal expansion and contraction.

[0062] refer to Figure 6 As shown, in some embodiments of this utility model, the plate 1 is provided with pads 104, and the conductive connector 3 is soldered to the pads 104. Corresponding to the above embodiments, if the conductive connector 3 is connected to the side wall surface 103, then the pads 104 are provided on the side wall surface 103; if the conductive connector 3 is connected to the first surface 101, then the pads 104 are provided at the corresponding positions on the first surface 101; if the conductive connector 3 is connected to the second surface 102, then the pads 104 are provided at the corresponding positions on the second surface 102.

[0063] In this embodiment, the pad 104 and the conductive connector 3 are physically and electrically connected by welding. The welding process can form a strong metal-to-metal bond, preventing the connector from loosening or falling off due to vibration, stress, or other factors. Furthermore, the welding has lower contact resistance and less energy loss during current transmission, ensuring a stable electrical connection between the battery 2 protection board and the battery 2 tabs, which is especially suitable for high-current charging and discharging scenarios.

[0064] In addition, pad 104 is a standard conductive structure on the PCB (usually a copper foil plating). Its size and position can be precisely designed according to the specifications of conductive connector 3, which facilitates the application of automated soldering processes.

[0065] Furthermore, if the conductive connector 3 needs to be replaced due to a malfunction, the old part can be removed by desoldering and the new part can be re-soldered without damaging the board 1. This repairability can reduce maintenance costs.

[0066] This utility model embodiment also provides a battery 2.

[0067] Specifically, battery 2 includes the protection plate as described above. One end of battery 2 is provided with a positive tab 201 and a negative tab 202, both of which are connected to corresponding conductive connectors 3.

[0068] The battery 2 provided by this utility model includes the protection board provided by this utility model, and therefore also includes all the advantages of the protection board mentioned above.

[0069] In some embodiments provided by this utility model, the positive electrode tab 201 and the negative electrode tab 202 are arranged opposite to each other and spaced apart, and the protective plate is arranged between the positive electrode tab 201 and the negative electrode tab 202.

[0070] The opposite sides of the first surface 101 are provided with sidewalls 103. The sidewalls 103 on both sides are respectively arranged opposite to the positive electrode tab 201 and the negative electrode tab 202. Each sidewall 103 is connected to a corresponding conductive connector 3, and the conductive connectors 3 on both sides are respectively connected to the positive electrode tab 201 and the negative electrode tab 202.

[0071] In this embodiment, conductive connectors 3 are respectively provided on two opposite sidewalls 103, and the connectors on each sidewall 103 can be designed with independent dimensions. For example, the dimensions of the conductive connectors 3 along the edge of the plate 1 can be increased. When the dimensions of the conductive connectors 3 increase, the cross-sectional area increases accordingly, thereby carrying a larger current, reducing heat loss during conduction, and improving the charging and discharging efficiency of the battery 2. It should be noted that the edge of the plate 1 mentioned in this embodiment refers to the edge of the plate 1 where the sidewalls 103 are located.

[0072] In addition, by providing conductive connectors 3 on two opposite sidewalls 103 respectively, the spacing between the conductive connectors 3 on the two sidewalls 103 is relatively large, which can improve the heat dissipation effect of the conductive connectors 3 and reduce the heat radiation effect between the conductive connectors 3, so that the conductive connectors 3 on both sidewalls 103 have good heat dissipation effect.

[0073] This utility model embodiment also provides an electrical appliance, such as, but not limited to, mobile phones and tablets.

[0074] Specifically, the electrical appliance includes the protection board as described above or the battery 2 as described above.

[0075] The appliance includes a protection board or battery 2, and therefore includes all the advantages of the protection board or battery 2 mentioned above.

[0076] 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 such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A protective plate, characterized in that, For use in battery (2), including: The plate (1) has a first surface (101) and a side wall (103), the first surface (101) is for facing the battery (2), the side wall (103) is provided at the edge of the first surface (101), and the side wall (103) intersects with the first surface (101); The conductive connector (3) is provided, and there are at least two conductive connectors (3). At least two conductive connectors (3) are connected to the side wall surface (103), and the outer surface of the conductive connector (3) facing away from the side wall surface (103) is used to connect to the tab of the battery (2).

2. The protective plate according to claim 1, characterized in that, The opposite sides of the first surface (101) are provided with sidewalls (103), and each sidewall (103) is connected to a corresponding conductive connector (3).

3. The protective plate according to claim 1, characterized in that, The plate (1) is configured as a strip structure extending along the first direction (X). The first surface (101) has two long sides (1011) extending along the first direction (X). The two long sides (1011) are arranged opposite to each other and each is provided with a corresponding side wall (103). Each side wall (103) is connected to a corresponding conductive connector (3).

4. The protective plate according to claim 1, characterized in that, The plate (1) also has a second surface (102) opposite to the first surface (101). The conductive connector (3) includes a main body (301) and a first flange (302). The main body (301) is connected to the side wall (103). The first flange (302) is connected to one end of the main body (301) near the second surface (102) and is folded toward the side of the main body (301) near the plate (1). The first flange (302) is connected to the second surface (102).

5. The protective plate according to claim 1, characterized in that, The conductive connector (3) includes a main body (301) and a first flange (302). The main body (301) is connected to the side wall (103). The first flange (302) is connected to one end of the main body (301) near the first surface (101) and is folded toward the side of the main body (301) near the plate (1). The first flange (302) is connected to the first surface (101).

6. The protective plate according to claim 1, characterized in that, The plate (1) also has a second surface (102) opposite to the first surface (101), and the conductive connector (3) includes a main body (301), a first flange (302) and a second flange (303); The main body (301) is connected to the side wall (103). The first flange (302) is connected to the end of the main body (301) near the second surface (102) and folds towards the side of the main body (301) near the plate (1). The first flange (302) is connected to the second surface (102). The second flange (303) is connected to the end of the main body (301) near the first surface (101) and folds towards the side of the main body (301) near the plate (1). The second flange (303) is connected to the first surface (101).

7. The protective plate according to any one of claims 1-5, characterized in that, The plate (1) is provided with a solder pad (104), and the conductive connector (3) is welded to the solder pad (104).

8. A battery, characterized in that, Including the protection plate as described in any one of claims 1-7, one end of the battery (2) is provided with a positive electrode tab (201) and a negative electrode tab (202), and both the positive electrode tab (201) and the negative electrode tab (202) are connected to the corresponding conductive connector (3).

9. The battery according to claim 8, characterized in that, The positive electrode tab (201) and the negative electrode tab (202) are arranged opposite to each other and spaced apart, and the protective plate is arranged between the positive electrode tab (201) and the negative electrode tab (202); The first surface (101) has sidewalls (103) on both opposite sides. The sidewalls (103) on both sides are respectively opposite to the positive electrode (201) and the negative electrode (202). Each sidewall (103) is connected to a corresponding conductive connector (3).

10. An electrical appliance, characterized in that, Includes the protection plate as described in any one of claims 1-7 or the battery as described in any one of claims 8-9 (2).

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