Battery protection board, battery and electric device

Abstract

The utility model relates to the technical field of energy storage devices, and particularly discloses a battery protection board, a battery and a power utilization device. The battery protection board comprises a board body; the battery cell connecting part comprises a first connecting part and a second connecting part, and the first connecting part and the second connecting part are arranged on the first side surface of the plate body at an interval; the connector is arranged at the end, close to the first connecting part, of the board body, the connector is arranged on the first side surface of the board body, and the distance between the edge of the end, close to the first connecting part, of the connector and the edge of the end, close to the connector, of the first connecting part is not smaller than 0.2 mm; or the connector is arranged on the second side surface of the board body, and at least part of the projection of the end, connected with the board body, of the connector on the first side surface coincides with the first connecting part. The battery protection board can effectively reduce the length of a current loop of the battery, so that the circulating path of current between the first connecting part and the connector is as short as possible, the linear internal resistance of the battery protection board is effectively reduced, and the temperature rise of the protection board is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage devices, and more specifically, to a battery protection board, a battery, and an electrical device. Background Art

[0002] A battery generally refers to any device that generates electrical energy. Batteries are a source of energy, offering stable voltage and current, long-term power supply, minimal susceptibility to external influences, and easy charging and discharging. Therefore, they are often used to power external devices (such as mobile phones, tablets, laptops, and other portable or removable electronic devices).

[0003] Batteries typically consist of a cell and a battery protection board (PB). The PB connects the cell to external electronic devices and protects the cell. However, as cell energy density increases and battery designs become more compact, the PB becomes less able to dissipate heat, leading to a higher temperature rise on the PB, which in turn affects battery performance. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a battery protection board, a battery and an electrical device, the structural design of which can effectively solve the problem of high temperature rise of the battery protection board.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A battery protection board, comprising:

[0007] plate body;

[0008] A cell connection portion, comprising a first connection portion and a second connection portion, wherein the first connection portion and the second connection portion are spaced apart and arranged on a first side surface of the plate body, one of the first connection portion and the second connection portion is a positive electrode connection portion, and the other is a negative electrode connection portion;

[0009] a connector provided at one end of the plate body close to the first connecting portion, and the connector provided on the first side surface, wherein a distance between an edge of an end of the connector close to the first connecting portion and an edge of an end of the first connecting portion close to the connector is not less than 0.2 mm;

[0010] Alternatively, the connector is provided on the second side surface of the board, and a projection of one end of the connector connected to the board on the first side surface at least partially overlaps with the first connecting portion;

[0011] The second side surface is opposite to the first side surface.

[0012] Optionally, in the above-mentioned battery protection board, a first conductive portion and a second conductive portion are provided on the first side surface at intervals, the first connecting portion is connected to the first conductive portion, and the connector is connected to the second conductive portion;

[0013] A distance between an edge of the second conductive portion close to the first conductive portion and an edge of the first conductive portion close to the second conductive portion is not less than 1.2 mm.

[0014] Optionally, in the above-mentioned battery protection plate, the first side surface and / or the second side surface is provided with a device area, and the device area is provided with electronic components.

[0015] Optionally, in the above-mentioned battery protection board, the device area is provided on the first side surface at an end of the first connecting portion away from the connector.

[0016] Optionally, in the above-mentioned battery protection board, the device area on the first side surface includes:

[0017] a first region located between the first connecting portion and the second connecting portion;

[0018] and / or,

[0019] The second area is located at an end of the second connecting portion away from the first connecting portion.

[0020] Optionally, in the above-mentioned battery protection board, the electronic components include a fuse and at least one metal oxide semiconductor field effect transistor, and the fuse and each metal oxide semiconductor field effect transistor are distributed at intervals.

[0021] Optionally, in the above-mentioned battery protection plate, a first notch and / or a second notch is opened on the edge of the plate body, the projection of the first notch on the first side surface is opposite to the first connecting portion, and the projection of the second notch on the first side surface is opposite to the second connecting portion.

[0022] Optionally, in the above-mentioned battery protection plate, the length L1 of the first notch satisfies the relationship: L1 ≥ W1 + 2 mm, where W1 is the width of the first tab of the battery cell matched with the battery protection plate;

[0023] The width B1 of the first notch satisfies the relationship: 0.2 mm ≤ B1 ≤ 1 mm;

[0024] and / or;

[0025] The length L2 of the second notch satisfies the relationship: L2 ≥ W2 + 2 mm, where W2 is the width of the second tab of the battery cell;

[0026] The width B2 of the second notch satisfies the relationship: 0.2 mm ≤ B2 ≤ 1 mm.

[0027] In the battery protection board provided by the present application, the first connection part and the second connection part are respectively used to connect to the tabs of the battery cell, and the connector is used to connect to the external electronic device. The connector is arranged close to the first connection part, and the battery cell can be connected to the external electronic device through the tabs, the first connection part, and the connector. In the present application, by arranging the connector as close to the first connection part as possible, when the connector is connected to the first side surface, the distance between the edge of one end of the connector close to the first connection part and the edge of one end of the first connection part close to the connector is not less than 0.2mm; when the connector is connected to the second side surface of the board body, the projection of the end of the connector connected to the board body on the first side surface at least partially overlaps with the first connection part. By setting it as above, while meeting the operating space requirements such as welding and the layout requirements of the first connection part and the connector, the close proximity of the connector to the first connection part can effectively reduce the current loop length of the battery, so that the path for the current to flow between the first connection part and the connector is as short as possible, effectively reducing the linear internal resistance of the battery protection board, thereby reducing the temperature rise of the protection board, which is beneficial to improving the performance of the battery.

[0028] To achieve the above objectives, the present application further provides a battery and an electrical device, which include any of the above-mentioned battery protection boards. Since the above-mentioned battery protection boards have the above-mentioned technical effects, the battery and the electrical device having the battery protection boards should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is a structural diagram of a battery protection board according to a specific embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of a method in which the battery protection board of this application is arranged at the head end of the battery cell;

[0032] Figure 3 This is a schematic diagram of another way in which the battery protection board of this application is arranged at the head end of the battery cell;

[0033] Figure 4 This is a schematic diagram of another method in which the battery protection board of the present application is arranged at the head end of the battery cell;

[0034] Figure 5This is a schematic structural diagram of a battery according to a specific embodiment of the present application;

[0035] Figure 6 for Figure 5 A magnified schematic diagram of part A;

[0036] Figure 7 for Figure 5 Explosion diagram of

[0037] Figure 8 This is a schematic structural diagram of a battery cell according to a specific embodiment of the present application;

[0038] Figure 9 for Figure 8 Schematic diagram of the development of China's battery cells.

[0039] Reference numerals:

[0040] 10-battery protection board; 20-battery core; 30-glue injection part; 40-insulating glue layer; 50-insulating layer;

[0041] 110 - board; 111 - first side surface; 112 - second side surface; 113 - first notch; 114 - second notch; 120 - cell connection portion; 121 - first connection portion; 122 - second connection portion; 130 - connector; 131 - external terminal; 140 - first conductive portion; 150 - second conductive portion; 160 - device area; 161 - first area; 162 - second area;

[0042] 210 - battery cell tab; 211 - first tab; 212 - second tab; 220 - battery cell body; 230 - housing; 231 - top seal; 232 - side seal; 233 - sharp corner;

[0043] 310-Boss. DETAILED DESCRIPTION

[0044] The embodiments of the present application disclose a battery protection board, a battery, and an electrical device to reduce the temperature rise of the battery protection board.

[0045] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0046] The battery protection board is used to connect the battery cell with external electronic devices and can protect the battery cell. For example, when the external power supply is charging the battery and the battery reaches a saturated state, the internal circuit of the protection board will automatically cut off, thereby avoiding overcharging. In order to improve the energy density of the battery, the battery structure is becoming more and more compact, which makes the temperature rise of the battery protection board higher. In this application, through the reasonable setting of the position of the connector and the battery cell connection part, the reasonable layout of the electronic components on the board body, and the reasonable structural setting of the battery cell external injection part, the temperature rise of the battery protection board can be reduced while maintaining the compact structure of the battery.

[0047] In some embodiments, see Figure 1-Figure 4 The battery protection board provided in this application includes a board body 110, a cell connection portion 120, and a connector 130. The board body 110 is the main structure of the battery protection board. The board body 110 can be a printed circuit board. For example, the board body 110 can include a substrate, and the components disposed on the board body 110 can be electrically connected via the printed circuit on the substrate.

[0048] The cell connection portion 120 is used to connect to the cell 20 and includes a first connection portion 121 and a second connection portion 122. The first connection portion 121 and the second connection portion 122 are spaced apart and arranged on the first side surface 111 of the plate body 110. One of the first connection portion 121 and the second connection portion 122 is a positive electrode connection portion for connecting to the positive electrode tab of the cell 20, and the other is a negative electrode connection portion for connecting to the negative electrode tab of the cell 20. It will be understood that the two opposing surfaces of the plate body 110 are respectively referred to as the first side surface 111 and the second side surface 112, i.e., the front and back sides of the plate body 110.

[0049] The connector 130 is provided at one end of the board body 110 close to the first connection portion 121, and the connector 130 is provided on the first side surface 111 or the second side surface 112. The connector 130 is an electrical connector for electrically connecting the battery protection board and the external electronic device. The electrical connection between the connector 130 and the first connection portion 121 can be specifically electrically connected through the printed circuit on the substrate. The current of the tab can be connected to the connector 130 through the first connection portion 121 via the printed circuit, and then connected to the external electronic device through the connector 130. Exemplarily, the connector 130 can be a flexible circuit board, one end of which is electrically connected to the board body 110, and the other end of the flexible circuit board, namely the external connection end 131, is used to electrically connect to the external electronic device. The connector 130 and the battery cell connection portion 120 can be connected to the same side of the board body 110, such as both being provided on the first side surface 111, such as Figure 2 and Figure 3 The connector 130 and the cell connection portion 120 may also be connected to different sides of the board 110, such as being respectively provided on the first side surface 111 and the second side surface 112, as shown; Figure 4 shown.

[0050] The connector 130 is positioned adjacent to the first connection portion 121. Both the connector 130 and the first connection portion 121 are connected to the board 110, while the first connection portion 121 is also connected to the tab of the battery cell 20. Therefore, the distance between the connector 130 and the first connection portion 121 must provide the necessary clearance for these connections. Since the connector 130 and the first connection portion 121 are electrically connected, a smaller distance between them shortens the current path, thereby minimizing the temperature rise of the battery protection board. When the connector 130 and the battery cell connecting portion 120 are connected to the same side of the board body 110, that is, when the connector 130 is provided on the first side surface 111, the distance between the edge of one end of the connector 130 close to the first connecting portion 121 and the edge of one end of the first connecting portion 121 close to the connector 130 is not less than 0.2 mm; when the connector 130 and the battery cell connecting portion 120 are connected to different sides of the board body 110, that is, when the connector 130 is provided on the second side surface 112 of the board body 110, the projection of the end of the connector 130 connected to the board body 110 on the first side surface 111 at least partially overlaps with the first connecting portion 121.

[0051] In this application, the position setting of the connector 130 is different from the conventional layout based on the battery's external dimensions and the internal device layout of the electrical device. Instead, the distance between the connector 130 and the first connecting part 121 is set based on the avoidance requirements when the connector 130 and the first connecting part 121 are connected respectively, thereby reducing the temperature rise of the protective plate.

[0052] In the battery protection board provided in the present application, the first connection portion 121 and the second connection portion 122 are respectively used to connect to the tabs of the battery cell 20, and the connector 130 is used to connect to an external electronic device. The connector 130 is arranged close to the first connection portion 121, and the battery cell 20 can be connected to the external electronic device through the tabs, the first connection portion 121, and the connector 130. In the present application, by arranging the connector 130 as close as possible to the first connection portion 121, the distance between the two is as small as possible while meeting the avoidance requirements of the connector 130 and the first connection portion 121 being connected to the corresponding components. Specifically, when the connector 130 is arranged on the first side surface 111, the distance between the edge of the connector 130 close to the first connection portion 121 and the edge of the first connection portion 121 close to the connector 130 is not less than 0.2 mm; when the connector 130 is arranged on the second side surface 112, the projection of the end of the connector 130 connected to the board body 110 on the first side surface 111 at least partially overlaps with the first connection portion 121. By setting as above, the current loop length of the battery can be effectively reduced, so that the path of the current flowing between the first connecting part 121 and the connector 130 is as short as possible, effectively reducing the linear internal resistance of the battery protection board, thereby reducing the temperature rise of the protection board, which is beneficial to improving the performance of the battery.

[0053] In some specific examples, the cell connection portion 120 may be a nickel sheet. The nickel sheet and the tab may be welded together using methods such as reflow soldering, laser welding, resistance welding, and ultrasonic welding. It is understood that an insulating layer may be provided at the weld between the tab and the protective plate to insulate the weld and prevent short circuits.

[0054] In some embodiments, the battery protection plate provided in the present application is placed flat on the head end of the battery cell 20, that is, the first side surface 111 or the second side surface 112 faces the head end of the battery cell 20. Unlike conventional protection plates placed vertically, in this embodiment, the protection plate is placed flat on the head end of the battery cell 20. Since the thickness of the protection plate is generally significantly smaller than its width, the flat placement of the protection plate can reduce the space occupied by the battery, allowing the battery cell 20 to have a larger size while maintaining the same overall dimensions, thereby increasing the battery capacity and effectively improving the endurance of the power-consuming device.

[0055] See also Figure 2 and Figure 3 In some embodiments, the connector 130 and the cell connection portion 120 are connected to the same side of the board 110 , that is, the connector 130 is connected to the first side surface 111 . Figure 2 In the embodiment, the first side surface 111 faces the head end of the battery cell 20. Figure 3 In the figure, the second side surface 112 faces the head end of the battery cell 20. The distance L between the edge of one end of the connector 130 close to the first connection part 121 and the edge of one end of the first connection part 121 close to the connector 130 is not less than 0.2 mm. In this embodiment, the connector 130 and the battery cell connection part 120 are connected to the same side of the board body 110, and a distance must be set between the two to meet the connection avoidance requirements, such as the welding avoidance requirements. By arranging the connector 130 close to the first connection part 121 and satisfying the above-mentioned distance L of not less than 0.2 mm, the normal function of the battery protection board can be achieved and its temperature rise can be reduced at the same time.

[0056] In some embodiments, the first side surface 111 is provided with a first conductive portion 140 and a second conductive portion 150 spaced apart from each other, the first connecting portion 121 is connected to the first conductive portion 140, and the connector 130 is connected to the second conductive portion 150. The distance d between the edge of the second conductive portion 150 proximate to the first conductive portion 140 and the edge of the first conductive portion 140 proximate to the second conductive portion 150 is no less than 1.2 mm. In some specific examples, the first conductive portion 140 and the second conductive portion 150 can be a first soldering pad and a second soldering pad, respectively, the first connecting portion 121 is soldered to the first soldering pad, and the connector 130 is soldered to the second soldering pad. To meet the welding operation between the first connecting portion 121 and the first soldering pad, and the welding operation between the connector 130 and the second soldering pad, the distance d between the edge of the second conductive portion 150 proximate to the first conductive portion 140 and the edge of the first conductive portion 140 proximate to the second conductive portion 150 must be no less than 1.2 mm. By arranging the connector 130 close to the first connection portion 121 and satisfying the above-mentioned distance d of not less than 1.2 mm, the normal function of the battery protection board can be achieved while reducing its temperature rise.

[0057] In some specific examples, when the first connecting part 121 is connected to the first conductive part 140 by reflow soldering, and the connector 130 is connected to the second conductive part 150 by reflow soldering, the distance L between the edge of one end of the connector 130 close to the first connecting part 121 and the edge of one end of the first connecting part 121 close to the connector 130 is not less than 0.2 mm, and the distance d between the edge of one end of the second conductive part 150 close to the first conductive part 140 and the edge of one end of the first conductive part 140 close to the second conductive part 150 is not less than 1.2 mm.

[0058] In other specific examples, when the first connecting part 121 is connected to the first conductive part 140 by manual welding, and the connector 130 is connected to the second conductive part 150 by manual welding, the distance L between the edge of one end of the connector 130 close to the first connecting part 121 and the edge of one end of the first connecting part 121 close to the connector 130 is not less than 0.5 mm, and the distance d between the edge of one end of the second conductive part 150 close to the first conductive part 140 and the edge of one end of the first conductive part 140 close to the second conductive part 150 is not less than 1.5 mm.

[0059] In some embodiments, the connector 130 and the cell connection portion 120 are connected to different sides of the board 110. That is, the connector 130 is connected to the second side surface 112, and the projection of the portion of the connector 130 connected to the board 110 on the first side surface 111 at least partially overlaps with the first connection portion 121. This arrangement results in a smaller spacing than when the connector 130 and the first connection portion 121 are connected to different sides of the board 110, significantly reducing the temperature rise of the battery protection board. However, this also occupies more space perpendicular to the first side surface 111. Therefore, depending on the specific requirements for the space required for the battery perpendicular to the first side surface 111, the connector 130 and the cell connection portion 120 can be connected to the same or different sides of the board 110.

[0060] See also Figure 1 In some embodiments, a device area 160 is provided on the first side surface 111 and / or the second side surface 112, and electronic components are provided in the device area 160. The electronic components are electrically connected through the printed circuit on the substrate. The electronic components include but are not limited to capacitors, resistors, metal oxide semiconductor field effect transistor switches, integrated circuits, etc. Depending on the space on the board 110 and the size and number of electronic components, a device area 160 may be provided on the first side surface 111 and / or the second side surface 112, and all electronic components may be provided on the first side surface 111 or the second side surface 112 accordingly. Alternatively, some electronic components may be provided on the first side surface 111, and the remaining electronic components may be provided on the second side surface 112. By dispersing the electronic components, heat is dispersed, which further reduces the temperature rise of the battery protection board.

[0061] In some embodiments, a device area 160 is provided on the first side surface 111 at the end of the first connection portion 121 away from the connector 130. By arranging the device area 160 away from the end where the connector 130 is connected to the board 110, and with a distance of at least the width of the first connection portion 121 between the device area 160 and the connection point between the connector 130 and the board 110, both the device area 160 and the connection point between the connector 130 and the board 110 are locations where high heat is generated, distributing the heat, thereby dispersing the heat and reducing the temperature rise of the battery protection board.

[0062] In some embodiments, the device region 160 on the first side surface 111 includes a first region 161 and / or a second region 162. The first region 161 is located between the first connecting portion 121 and the second connecting portion 122; the second region 162 is located at the end of the second connecting portion 122 distal from the first connecting portion 121. If the first region 161 can accommodate the placement of the electronic components, the electronic components are distributed within the first region 161. Because the first region 161 is located between the first connecting portion 121 and the second connecting portion 122, when the electronic components are placed within the first region 161, the current loop formed with the first and second connecting portions 121 and 122 is shorter, thereby helping to reduce the temperature rise of the battery protection board. If the first region 161 cannot accommodate the placement of the electronic components, the electronic components can be placed separately within the first and second regions 161 and 162. Of course, depending on actual needs, all electronic components can also be placed within the second region 162.

[0063] In some embodiments, the electronic components include a fuse and at least one MOSFET, with the fuse and each MOSFET spaced apart. The fuse and MOSFET generate significant heat, and spacing them apart helps disperse the heat, thereby reducing the temperature rise of the battery protection board. Specifically, both the fuse and MOSFET can be located in the aforementioned first region 161.

[0064] See also Figure 3In some embodiments, a first notch 113 and / or a second notch 114 are defined on the edge of the plate 110. The projection of the first notch 113 on the first side surface 111 is opposite the first connecting portion 121, and the projection of the second notch 114 on the first side surface 111 is opposite the second connecting portion 122. When the second side surface 112 faces the leading end of the battery cell 20, the battery cell tab 210 needs to bypass the plate 110 to connect with the battery cell connecting portion 120 on the first side surface 111. When the cell tab 210 is bent, it will occupy space in the width direction of the plate body 110. Therefore, in this embodiment, a first notch 113 is provided at the edge of the plate body 110 corresponding to the first connecting portion 121, or a second notch 114 is provided corresponding to the second connecting portion 122, or a first notch 113 and a second notch 114 are provided respectively. Then, the corresponding first tab 211 and / or second tab 212 can be placed in the corresponding first notch 113 or second notch 114. In other words, the first notch 113 and the second notch 114 can avoid the cell tab 210, thereby preventing the cell tab 210 from protruding from the edge of the plate body 110. It is understandable that when the difference between the thickness of the battery cell 20 and the width of the battery protection plate is sufficient to avoid the bending of the cell tab 210, the above-mentioned first notch 113 and the second notch 114 can also be omitted. In addition, when the first side surface 111 faces the head end of the battery cell 20 , the battery cell tab 210 does not need to bypass the plate body 110 , and the first notch 113 and the second notch 114 may or may not be provided on the plate body 110 .

[0065] In some embodiments, the length L1 of the first notch 113 satisfies the relationship: L1 ≥ W1 + 2 mm, where W1 is the width of the first tab 211 of the battery cell 20 that cooperates with the battery protection plate. The length of the first notch 113 is set as described above, and can cooperate with the first tab 211, meet the accommodation requirements of the first tab 211, and occupy a small space. The width B1 of the first notch 113 satisfies the relationship: 0.2 mm ≤ B1 ≤ 1 mm. The width of the first notch 113 is set as described above, and can cooperate with the first tab 211, meet the accommodation requirements of the first tab 211, and occupy a small space.

[0066] In some embodiments, the length L2 of the second notch 114 satisfies the relationship: L2 ≥ W2 + 2 mm, where W2 is the width of the second tab 212 of the battery cell 20 ; the width B2 of the second notch 114 satisfies the relationship: 0.2 mm ≤ B2 ≤ 1 mm.

[0067] Based on the battery protection plate provided in the above embodiments, the present application further provides a battery, comprising a battery cell 20 and a battery protection plate 10 according to any one of the above embodiments, wherein the first side surface 111 or the second side surface 112 faces the battery cell 20, and the battery cell 20 is provided with a first pole tab 211 and a second pole tab 212, one of the first pole tab 211 and the second pole tab 212 being a positive electrode and the other being a negative electrode, the first pole tab 211 being connected to the first connecting portion 121, and the second pole tab 212 being connected to the second connecting portion 122. Since the battery adopts the battery protection plate 10 according to the above embodiments, the beneficial effects of the battery are described in the above embodiments.

[0068] See also Figure 5-Figure 7 In some embodiments, the battery provided in the present application further includes a glue injection part 30, the battery protection board 10 is coated in the glue injection part 30, and the external terminal 131 of the connector 130 is exposed outside the glue injection part 30. The glue injection part 30 can specifically be a plastic part. The plastic part is light in weight, has good chemical stability, excellent electrical insulation performance, good thermal insulation performance, and high mechanical strength. Specifically, the glue injection part 30 can be injection molded at the head end of the battery cell 20 to protect the head end of the battery cell 20 and the battery protection board 10. An insulating glue layer 40 can be provided between the battery protection board 10 and the battery cell 20 for insulation and fixation, and the tail of the battery cell 20 can also be wrapped with an insulating layer 50 for insulation.

[0069] Furthermore, a boss 310 is provided on the surface of the injection portion 30 away from the battery cell 20, and the connector 130 is located on one side of the boss 310. Specifically, the middle or one side of the injection portion 30 is protruding, and there is a step at the end connected to the connector 130. This means that the injection portion 30 is thinner at the end corresponding to the end connected to the board 110. By positioning the connection point between the connector 130 and the board 110 on one side of the boss 310, where the injection portion 30 covers a thinner area, the adverse effect of the injection portion 30 on heat dissipation is reduced, thereby facilitating heat dissipation from the connector 130 and, in turn, reducing the temperature rise of the battery protection board 10.

[0070] In some embodiments, see Figure 5 The height H of boss 310 and the thickness T of connector 130 satisfy the relationship: 1 ≥ H ≥ T + 0.1 mm. This arrangement provides sufficient space for the external terminal 131 of connector 130 to effectively connect to external electronic devices, while also facilitating heat dissipation from connector 130 and minimizing overall battery space usage.

[0071] See also Figure 8 and Figure 9In some embodiments, the battery cell 20 provided in the present application includes a battery cell body and a shell 230. The tab is provided on the battery cell body. The shell 230 is coated on the outside of the battery cell body. The shell 230 includes a top seal portion 231, a side seal portion 232 and a sharp corner portion 233. The top seal portion 231 is provided on the top end surface of the battery cell body, the side seal portion 232 is provided on the side end surface of the battery cell body, and the sharp corner portion 233 is connected to the top end of the side seal portion 232, and remains upright and protrudes from the top end surface of the battery cell body. The outer periphery of the battery cell body is coated / wrapped with the shell 230 to protect the battery cell body. In some specific examples, the shell 230 can be made of an aluminum-plastic film material, wherein the aluminum-plastic film has high barrier properties, good cold stamping formability, puncture resistance, and electrolyte stability. When the top seal portion 231 is made of an aluminum-plastic film, the film's bendability can be utilized to bend the top seal portion 231 toward the cell body, so that the top seal portion 231 is parallel, approximately parallel, or substantially parallel to the top surface of the cell body, thereby reducing the space occupied by the top seal portion 231. Specifically, the top seal portion 231 can be fixed to the top surface of the cell body using adhesive dispensing, double-sided tape, or insulating tape.

[0072] Side seals 232 can be provided on opposite sides of the battery cell 20 along its width direction. One of the side seals 232 is located on one side of the top seal 231, and the other is located on the other side of the top seal 231. When the side seals 232 are made of aluminum-plastic film, the film's bendability can be utilized to fold the side seals 232 toward the battery cell 20, allowing them to adhere to the side end surfaces of the battery cell body, thereby reducing the space occupied by the side seals 232. Alternatively, an adhesive layer can be used to secure the side seals 232 to the side end surfaces of the battery cell body.

[0073] Based on the battery protection board provided in the above embodiments, this application also provides an electrical device, which includes any of the battery protection boards or batteries in the above embodiments. Since the electrical device uses the battery protection board in the above embodiments, the beneficial effects of the electrical device can be referred to the above embodiments.

[0074] It is understandable that the design of the electrical device can be energy storage application or power output, or it can be compatible with the two application modes, which should all fall within the scope of the description of this application, specifically including but not limited to mobile phones, tablet computers, laptops, etc.

[0075] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0076] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery protection board, characterized in that: include: Plate(110); A cell connecting portion (120) comprising a first connecting portion (121) and a second connecting portion (122), wherein the first connecting portion (121) and the second connecting portion (122) are arranged at intervals on the first side surface (111) of the plate body (110), and one of the first connecting portion (121) and the second connecting portion (122) is a positive electrode connecting portion, and the other is a negative electrode connecting portion; A connector (130) is provided at one end of the plate body (110) close to the first connecting portion (121), and the connector (130) is provided on the first side surface (111), and a distance between an edge of one end of the connector (130) close to the first connecting portion (121) and an edge of one end of the first connecting portion (121) close to the connector (130) is not less than 0.2 mm; Alternatively, the connector (130) is provided on the second side surface (112) of the plate body (110), and a projection of one end of the connector (130) connected to the plate body (110) on the first side surface (111) at least partially overlaps with the first connecting portion (121); Wherein, the second side surface (112) is opposite to the first side surface (111).

2. The battery protection board according to claim 1, characterized in that: The first side surface (111) is provided with a first conductive portion (140) and a second conductive portion (150) at intervals, the first connecting portion (121) is connected to the first conductive portion (140), and the connector (130) is connected to the second conductive portion (150); The distance between an edge of one end of the second conductive part (150) close to the first conductive part (140) and an edge of one end of the first conductive part (140) close to the second conductive part (150) is not less than 1.2 mm.

3. The battery protection board according to claim 1 or 2, characterized in that: The first side surface (111) and / or the second side surface (112) is provided with a device area (160), and the device area (160) is provided with an electronic component.

4. The battery protection board according to claim 3, characterized in that: The device area (160) is provided on the first side surface (111) at an end of the first connecting portion (121) away from the connector (130).

5. The battery protection board according to claim 4, characterized in that: The device region (160) on the first side surface (111) includes: A first region (161) is located between the first connecting portion (121) and the second connecting portion (122); and / or, The second region (162) is located at an end of the second connecting portion (122) away from the first connecting portion (121).

6. The battery protection board according to claim 3, characterized in that: The electronic component includes a fuse and at least one metal oxide semiconductor field effect transistor, and the fuse and each metal oxide semiconductor field effect transistor are distributed at intervals.

7. The battery protection board according to claim 1 or 2, characterized in that: The edge of the plate body (110) is provided with a first notch (113) and / or a second notch (114); a projection of the first notch (113) on the first side surface (111) is opposite to the first connecting portion (121); and a projection of the second notch (114) on the first side surface (111) is opposite to the second connecting portion (122).

8. The battery protection board according to claim 7, characterized in that: The length L1 of the first notch (113) satisfies the relationship: L1 ≥ W1 + 2 mm, where W1 is the width of the first tab (211) of the battery cell (20) that cooperates with the battery protection plate; The width B1 of the first notch (113) satisfies the relationship: 0.2 mm ≤ B1 ≤ 1 mm; and / or; The length L2 of the second notch (114) satisfies the relationship: L2 ≥ W2 + 2 mm, where W2 is the width of the second tab (212) of the battery cell (20); The width B2 of the second notch (114) satisfies the relationship: 0.2 mm ≤ B2 ≤ 1 mm.

9. A battery comprising a battery cell (20), characterized in that: The battery protection plate (10) further comprises the battery protection plate (10) according to any one of claims 1 to 8, wherein the first side surface (111) or the second side surface (112) faces the battery cell (20), and the battery cell (20) is provided with a first pole lug (211) and a second pole lug (212), one of the first pole lug (211) and the second pole lug (212) is a positive electrode, and the other is a negative electrode, the first pole lug (211) is connected to the first connecting portion (121), and the second pole lug (212) is connected to the second connecting portion (122).

10. The battery according to claim 9, characterized in that The battery protection plate (10) is also included in the glue injection portion (30), the battery protection plate (10) is covered in the glue injection portion (30), the external connection end (131) of the connector (130) is exposed outside the glue injection portion (30), and a boss (310) is provided on the surface of the glue injection portion (30) away from the battery cell (20), and the connector (130) is located on one side of the boss (310).

11. The battery according to claim 10, characterized in that The height H of the boss (310) and the thickness T of the connector (130) satisfy the relationship: 1≥H≥T+0.1mm.

12. An electrical device, characterized in that: The invention comprises the battery protection plate according to any one of claims 1 to 8 and / or the battery according to any one of claims 9 to 11.

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