Protective board assembly, battery and electric device

Abstract

A protective board assembly, a battery and an electric device. The protective board assembly comprises a first circuit board, a connector, a first electronic element and an encapsulation member, wherein the first circuit board comprises a base and a first extension section connected to the base, the first extension section protruding from the base, and the first extension section comprising a first surface and a second surface, which are arranged opposite each other in a first arrangement direction; the connector is connected to the first surface and is configured to electrically connect to an external circuit; the first electronic element is connected to the second surface and is configured to form a protective circuit; the encapsulation member is connected to the second surface and wraps around the first electronic element; and in the first arrangement direction, the projection of the encapsulation member overlaps the projection of the connector. The protective board assembly facilitates the increase of the energy density of a battery provided with the protective board assembly.

Description

Protection board components, batteries and electrical equipment Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a protection board assembly, a battery, and an electrical device. Background Art

[0002] A battery consists of a cell and a protective plate assembly mounted on the cell's head. In existing protective plate assemblies, most electronic components are mounted on a base plate, with the circuit board protruding from the base only housing connectors. This results in the electronic components on the base plate occupying a large space at the cell's head, impacting the battery's energy density. Summary of the Invention

[0003] In view of the above situation, it is necessary to provide a protection plate assembly, which is beneficial to improving the energy density of a battery provided with the protection plate assembly.

[0004] An embodiment of the present application provides a protective plate assembly, comprising a first circuit board, a connector, a first electronic component, and a package. The first circuit board comprises a base and a first extension connected to the base, the first extension protruding from the base, and the first extension comprising a first surface and a second surface disposed opposite each other along a first arrangement direction. The connector is connected to the first surface. The first electronic component is connected to the second surface. The package is connected to the second surface and covers the first electronic component. Along the first arrangement direction, the projection of the package overlaps with the projection of the connector.

[0005] In the above-mentioned protection board assembly, the connector is connected to the first surface and is configured to be electrically connected to the external circuit, the first electronic component is connected to the second surface and is configured to form a protection circuit, and the package is connected to the second surface and covers the first electronic component. Along the first arrangement direction, the projection of the package overlaps with the projection of the connector. The package can improve the structural strength of the part where the connector is set in the first extension section, and reduce the risk of damage to the first extension section due to force during the connection between the connector and the external circuit. In addition, when the connector is located in the mainboard compartment of the electrical device and is connected to the mainboard of the electrical device, the package and the first electronic component in the package can utilize the space in the mainboard compartment of the electrical device. Compared with the traditional method of arranging most of the electronic components on the substrate, the space occupied by the electronic components at the head of the battery cell can be reduced, which is beneficial to improving the energy density of the battery provided with a protection board assembly.

[0006] In some embodiments of the present application, the protective plate assembly further includes a substrate connected to the base, with one end of the first extension segment positioned proximate to the substrate and the other end extending away from the substrate. Compared to the conventional method of placing the majority of electronic components on the substrate, relocating the package and the first electronic component outward reduces the required substrate layout area, thereby reducing the thickness of the substrate and facilitating increased energy density of the battery equipped with the protective plate assembly.

[0007] In some embodiments of the present application, the second surface includes a first region and a second region. Along the first arrangement direction, the projection of the connector and the projection of the package are both located within the projection range of the first region, so that the projection of the package overlaps with the projection of the connector. The second region is located on the side of the first region facing the substrate.

[0008] In some embodiments of the present application, when viewed along the first arrangement direction, the package includes an inner peripheral edge, and the first region includes an outer peripheral edge, which surrounds the inner peripheral edge. The outer peripheral edge surrounds the inner peripheral edge with a spacing of 0.1 mm to 0.5 mm to reduce the risk of packaging material leakage during processing and improve space utilization of the package in the first region.

[0009] In some embodiments of the present application, the package includes two first outer side surfaces and two second outer side surfaces, the two first outer side surfaces are arranged opposite to each other along the second arrangement direction, the two second outer side surfaces are arranged opposite to each other along the third arrangement direction, and the first outer side surfaces and the second outer side surfaces are connected end to end. The first arrangement direction, the second arrangement direction, and the third arrangement direction are perpendicular to each other. Along the second arrangement direction, the spacing between the two first outer side surfaces is 3 mm to 10 mm; along the third arrangement direction, the spacing between the two second outer side surfaces is 2 mm to 10 mm, so as to facilitate encapsulation of the first electronic component and adapt to the shape of the connector.

[0010] In some embodiments of the present application, the package also includes a third outer side surface. Along the first arrangement direction, the third outer side surface is located on the side of the first electronic component away from the second surface, and the distance between the end face of the first electronic component away from the second surface and the third outer side surface is 0.15 mm to 5 mm, which can improve the protection of the package to the first electronic component and reduce the space waste of the package in the first arrangement direction.

[0011] In some embodiments of the present application, the Shore hardness of the packaging component is greater than 40, so as to improve the reinforcing effect of the packaging component on the portion where the connector is provided in the first extension section.

[0012] In some embodiments of the present application, the first electronic component includes at least one of an anti-counterfeiting chip, a capacitor, and a resistor, wherein the anti-counterfeiting chip is used to identify whether the battery cell connected to the connector is a standard battery cell.

[0013] In some embodiments of the present application, the first circuit board further includes a second extension section. The base portion and the substrate are disposed opposite each other, the second extension section is bent and connected between the substrate and the base portion, and the first extension section is connected to the end of the base portion distal from the second extension section. The base portion has a margin of motion relative to the substrate portion. If the substrate portion and the mainboard of the electrical device shake or shift, the base portion can bend relative to the substrate using the second extension section as a fulcrum, thereby reducing the risk of connectors and packaging components on the first extension section being detached from the mainboard compartment of the electrical device.

[0014] In some embodiments of the present application, the substrate includes a second circuit board and a reinforcement plate connected to the second circuit board. The second circuit board and the base are respectively located on opposite sides of the reinforcement plate. The second circuit board and the first circuit board are integrally arranged to improve the stability of the connection between the substrate and the first circuit board.

[0015] An embodiment of the present application also provides a battery, comprising a battery cell and any one of the protection plate assemblies described above, wherein the protection plate assembly is disposed on one side of the battery cell and electrically connected to the battery cell, and the first extension section extends in a direction away from the battery cell.

[0016] In some embodiments of the present application, the battery cell includes an electrode assembly, a packaging bag and a tab. The packaging bag includes a main body and a packaging portion, the electrode assembly is accommodated in the main body, the main body includes a top wall, and the packaging portion includes a first packaging edge. The first packaging edge is connected to the top wall and extends along a first direction, and the first packaging edge and the top wall are arranged relative to each other along a second direction. One end of the tab is electrically connected to the electrode assembly, and the other end of the tab extends from the first packaging edge. The first direction is the thickness direction of the battery cell, and the second direction is perpendicular to the first direction. The protective plate assembly also includes a substrate, a first circuit board is connected to the substrate, the substrate is located on the side of the first packaging edge away from the top wall, the substrate and the first packaging edge are arranged relative to each other along the second direction, and the tab is also connected to the substrate to reduce the space occupied by the substrate at the head of the battery cell, thereby improving the energy density of the battery.

[0017] In some embodiments of the present application, the protection plate assembly further includes a conductive part and a second electronic component, and the conductive part and the second electronic component are connected to the side of the substrate facing the first packaging edge. The conductive part connects the pole ear, the second electronic component and the conductive part are spaced apart, the second electronic component is electrically connected to the first electronic component, and the second electronic component and the first electronic component are configured to form a protection circuit. Along the thickness direction of the substrate, the height of the second electronic component is 0.1mm to 0.3mm, so that electronic components with lower height can utilize the height space of the conductive part in the second direction, thereby improving the space utilization between the substrate and the first packaging edge. Along the first arrangement direction, the height of the first electronic component is 0.4mm to 0.8mm, so that electronic components with higher height can utilize the space of the mainboard compartment of the electrical equipment, reducing the space occupied by the electronic components at the head of the battery cell, which is beneficial to improving the energy density of the battery. In addition, by arranging the first electronic component and the second electronic component on the first circuit board and the substrate respectively, the risk of interference between the first electronic component and the second electronic component can also be reduced.

[0018] An embodiment of the present application also provides an electrical device, including a mainboard and any one of the batteries in the above embodiments. The connector is electrically connected to the mainboard to further reduce the space occupied by electronic components at the head of the battery cell. In addition, it can also reduce the demand for the layout area of ​​the substrate to thin the thickness of the substrate, which is beneficial to improving the energy density of the battery.

[0019] In some embodiments of the present application, the electrical device further includes a third electronic component, which is connected to the mainboard and electrically connected to the first electronic component, and the third electronic component and the first electronic component are configured to form a protection circuit. Compared to the traditional method of placing most electronic components on the substrate, this can reduce the space occupied by electronic components at the head of the battery cell, and can also reduce the required layout area of ​​the substrate, thereby reducing the thickness of the substrate, which is conducive to improving the energy density of the battery.

[0020] In the above-mentioned protection board assembly, battery and electrical equipment, the connector is connected to the first surface and is configured to electrically connect to the external circuit, the first electronic component is connected to the second surface and is configured to form a protection circuit, and the package is connected to the second surface and covers the first electronic component. Along the first arrangement direction, the projection of the package overlaps with the projection of the connector. The package can improve the structural strength of the part where the connector is set in the first extension section, and reduce the risk of damage to the first extension section due to force during the connection between the connector and the external circuit. In addition, when the connector is located in the main board compartment of the electrical equipment and is connected to the main board of the electrical equipment, the package and the first electronic component in the package can utilize the space in the main board compartment of the electrical equipment. Compared with the traditional method of arranging most of the electronic components on the substrate, the space occupied by the electronic components at the head of the battery cell can be reduced, which is beneficial to improving the energy density of the battery provided with a protection board assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of a protective plate assembly from a first perspective in one embodiment of the present application.

[0022] FIG2 is a schematic structural diagram of a protective plate assembly from a second perspective in one embodiment of the present application.

[0023] FIG3 is a schematic structural diagram of a package of a protection plate assembly from a first perspective in one embodiment of the present application.

[0024] FIG4 is a schematic structural diagram of a package of a protection plate assembly from a second perspective in one embodiment of the present application.

[0025] FIG5 is a schematic structural diagram of a battery in one embodiment of the present application.

[0026] FIG6 is a schematic structural diagram of an adhesive component of a battery in one embodiment of the present application.

[0027] FIG7 is a schematic structural diagram of an adhesive component of a battery in another embodiment of the present application.

[0028] FIG8 is a schematic structural diagram of a battery in another embodiment of the present application.

[0029] FIG9 is a schematic structural diagram of an electrical device in an embodiment of the present application.

[0030] Description of Main Component Symbols Protection plate assembly 100 Battery 200 Electrical device 300 First circuit board 10 First extension section 10a Second extension section 10b Base 10c First surface 11 Second surface 12 First region 121 Outer edge 121a Second region 122 First side 13 Second side 14 Third side 15 Fourth side 16 Extension line L Fifth side 17 Sixth side 18 Connector 20 First electronic component 31 End surface 311 Conductive member 32 Second electronic component 33 Third electronic component 34 First connector 234 Package 40 Inner edge40a First outer side surface 41 Second outer side surface 42 Third outer side surface 43 Substrate 50 Second circuit board 51 Reinforcement plate 52 Battery cell 60 Electrode assembly 61 Packaging bag 62 Main body 621 Top wall 621a Packaging portion 622 First packaging edge 622a Tab 63 First adhesive 71 First adhesive portion 711 Second adhesive portion 712 Gap 713 Second adhesive 72 Main board 80 First arrangement direction A Second arrangement direction B Third arrangement direction C First direction X Second direction Z Third direction Y

[0031] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0033] It should be noted that when an element is considered to be “connected” to another element, it may be directly connected to the other element or there may be a centrally disposed element. When an element is considered to be “disposed on” another element, it may be directly disposed on the other element or there may be a centrally disposed element.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] It should be understood that, taking into account the actual processing tolerance factors, in the technical solution of the present application, when two elements are arranged parallel / vertically and in the same direction, there may be a certain angle between the two elements, and a tolerance of 0-±10% is allowed between the two elements. A tolerance of 0-±10% is allowed when the two elements are greater than, equal to, or less than.

[0036] An embodiment of the present application provides a protective plate assembly, comprising a first circuit board, a connector, a first electronic component, and a package. The first circuit board comprises a base and a first extension connected to the base, the first extension protruding from the base, and the first extension comprising a first surface and a second surface disposed opposite each other along a first arrangement direction. The connector is connected to the first surface. The first electronic component is connected to the second surface. The package is connected to the second surface and covers the first electronic component. Along the first arrangement direction, the projection of the package overlaps with the projection of the connector.

[0037] In the above-mentioned protection board assembly, the connector is connected to the first surface and is configured to be electrically connected to the external circuit, the first electronic component is connected to the second surface and is configured to form a protection circuit, and the package is connected to the second surface and covers the first electronic component. Along the first arrangement direction, the projection of the package overlaps with the projection of the connector. The package can improve the structural strength of the part where the connector is set in the first extension section, and reduce the risk of damage to the first extension section due to force during the connection between the connector and the external circuit. In addition, when the connector is located in the mainboard compartment of the electrical device and is connected to the mainboard of the electrical device, the package and the first electronic component in the package can utilize the space in the mainboard compartment of the electrical device. Compared with the traditional method of arranging most of the electronic components on the substrate, the space occupied by the electronic components at the head of the battery cell can be reduced, which is beneficial to improving the energy density of the battery provided with a protection board assembly.

[0038] The embodiments of the present application are further described with reference to the accompanying drawings.

[0039] Please refer to Figures 1 and 2 together. An embodiment of the present application provides a protection board assembly 100, which is used to protect the battery cell 60, such as performing voltage monitoring, current detection, temperature monitoring, insulation monitoring, etc. on the battery cell 60, to reduce the risk of the battery cell 60 being in an overcharge, over-discharge, overcurrent, short circuit state and ultra-high temperature charging and discharging state.

[0040] The protective plate assembly 100 includes a first circuit board 10, a connector 20, a first electronic component 31, and a package 40. The first circuit board 10 is a flexible printed circuit (FPC), a printed circuit made of a flexible insulating substrate. A portion of the first circuit board 10 is electrically connected to the battery cell 60, while another portion extends to the mainboard compartment of the electrical device.

[0041] It should be noted that the first circuit board 10 is electrically connected to the battery cell 60 through a substrate or other conductive members.

[0042] The first circuit board 10 includes a base 10c and a first extension 10a connected to the base 10c. The first extension 10a protrudes from the base 10c. The end of the first extension 10a, distal from the base 10c, is configured to extend to the motherboard compartment of the electrical device. The first extension 10a includes a first surface 11 and a second surface 12 that are arranged opposite each other along a first arrangement direction A.

[0043] The connector 20 is connected to the first surface 11 and is configured to electrically connect to an external circuit. The external circuit may be, but is not limited to, a motherboard of an electrical device.

[0044] The first electronic component 31 is connected to the second surface 12 and is configured to form a protection circuit. Specifically, the first electronic component 31 includes at least one of an anti-counterfeiting chip, a capacitor, and a resistor. The anti-counterfeiting chip is used to identify whether the battery cell 60 connected to the connector 20 is a standard battery cell.

[0045] The package 40 is connected to the second surface 12 and covers the first electronic component 31. The package 40 is used to package the first electronic component 31 to form a packaging system to protect the first electronic component 31. Optionally, the package 40 is formed by a resin material on the second surface 12 by injection molding, potting or spraying.

[0046] Along the first arrangement direction A, the projection of the package 40 overlaps with the projection of the connector 20. Specifically, the following situations may occur: the projection of the package 40 partially overlaps with the projection of the connector 20; the projection of the package 40 coincides with the projection of the connector 20; and the projection of the connector 20 is within the projection range of the package 40.

[0047] The package 40 improves the structural strength of the first extension section 10a where the connector 20 is mounted, reducing the risk of damage to the first extension section 10a due to stress during connection between the connector 20 and the external circuit. Furthermore, when the connector 20 is located in the mainboard compartment of an electrical device and connected to the mainboard, the package 40 and the first electronic component 31 within it can utilize the space within the mainboard compartment. Compared to traditional methods that place most electronic components on the substrate, this reduces the space occupied by electronic components at the head of the battery cell 60, thereby improving the energy density of batteries equipped with the protective plate assembly 100.

[0048] In some embodiments, the Shore hardness of the packaging member 40 is greater than 40, so as to enhance the reinforcing effect of the packaging member 40 on the portion of the first extension section 10 a where the connector 20 is disposed.

[0049] Please refer to Figures 1 and 2 together. In some embodiments, the protection plate assembly further includes a substrate 50, which is disposed at the head of the battery cell 60 for connecting to the tabs of the battery cell 60. The first circuit board 10 is electrically connected to the battery cell 60 through the substrate 50. The substrate 50 is connected to the base 10c, and one end of the first extension section 10a is close to the substrate 50, and the other end of the first extension section 10a extends in a direction away from the substrate 50 so as to extend into the mainboard compartment of the electrical equipment. Compared with the traditional method of arranging most electronic components on the substrate, moving the package 40 and the first electronic component 31 outward can reduce the demand for the layout area of ​​the substrate 50 to reduce the thickness of the substrate 50, which is beneficial to improving the energy density of the battery provided with the protection plate assembly 100.

[0050] In some embodiments, the base 10 c and the substrate 50 are disposed opposite to each other, and the surface closer to the substrate 50 of the two opposite surfaces along the thickness direction of the base 10 c is connected to the substrate 50 .

[0051] In some embodiments, the substrate 50 includes a second circuit board 51 and a reinforcement plate 52 connected to the second circuit board 51. The second circuit board 51 and the base 10c are located on opposite sides of the reinforcement plate 52. The second circuit board 51 is a flexible circuit board. The second circuit board 51 and the first circuit board 10 are integrally provided to improve the stability of the connection between the substrate 50 and the first circuit board 10.

[0052] It is understandable that in other embodiments, the substrate 50 may be a printed circuit board or a rigid-flex board.

[0053] Referring to Figures 1 and 2 , in some embodiments, the first circuit board 10 further includes a second extension section 10b, which is bent and connected between the substrate 50 and the base 10c. One end of the second extension section 10b is connected to the second circuit board 51, and the first extension section 10a is connected to the end of the base 10c away from the second extension section 10b. The base 10c has a margin of movement compared to the substrate 50. When the substrate 50 and the mainboard of the electrical device shake or shift, the base 10c can bend relative to the substrate 50 using the second extension section 10b as a fulcrum, thereby reducing the risk of the connector 20 and package 40 on the first extension section 10a detaching from the mainboard compartment of the electrical device.

[0054] In some embodiments, the second circuit board 51 and the second extension section 10 b , the base 10 c and the first extension section 10 a of the first circuit board 10 are integrally provided to improve the stability of the connection between the substrate 50 and the first circuit board 10 .

[0055] In some embodiments, the protection plate assembly 100 further includes a third circuit board 55. The second extension 10b is connected to one end of the substrate 50, and the third circuit board 55 is connected to the other end of the substrate 50. It is understood that the structure of the third circuit board 55 is similar to that of the first circuit board 10. The third circuit board 55 is provided with connectors, electronic components, and packaging components, which are not described in detail here.

[0056] Referring also to FIG. 3 , in some embodiments, the second surface 12 includes a first region 121 and a second region 122. Along the first arrangement direction A, the projections of the connector 20 and the package 40 are both located within the projection range of the first region 121, such that the projection of the package 40 overlaps with the projection of the connector 20. The second region 122 is located on the side of the first region 121 facing the substrate 50.

[0057] Specifically, when viewed along the first arrangement direction A, the first extension section 10a includes a first side 13, a second side 14, a third side 15, a fourth side 16, a fifth side 17, and a sixth side 18. The second side 14 is away from the substrate 50 in the extending direction of the first extension section 10a, the first side 13 is connected to one side of the second side 14 in the second arrangement direction B, and the third side 15, the fourth side 16, the fifth side 17, and the sixth side 18 are arranged on the other side of the second side 14 in the second arrangement direction B.

[0058] The third side 15 is connected to the second side 14 and parallel to the first side 13 along the second arrangement direction B. The fourth side 16 is connected to the third side 15 and parallel to the second side 14 along the third arrangement direction C. The end of the fourth side 16 away from the third side 15 is spaced apart from the first side 13. The first arrangement direction A, the second arrangement direction B, and the third arrangement direction C are mutually perpendicular. The fifth side 17 is connected between the fourth side 16 and the sixth side 18 and extends in an arc. The sixth side 18 is parallel to the first side 13 along the second arrangement direction B. Along the second arrangement direction B, the distance between the sixth side 18 and the first side 13 is smaller than the distance between the third side 15 and the first side 13. On the second surface 12, the area between the fourth side 16 and the second side 14, bounded by the extension line L of the fourth side 16 toward the first side 13, is a first area 121, and the area of ​​the fourth side 16 away from the second side 14 is a second area 122.

[0059] Continuing with FIG. 3 , as viewed along the first arrangement direction A, the package 40 includes an inner peripheral edge 40a, and the first region 121 includes an outer peripheral edge 121a. The outer peripheral edge 121a surrounds the inner peripheral edge 40a. The outer peripheral edge 121a specifically includes the second side 14, the third side 15, the fourth side 16, and their extension line L, as well as a portion of the first side 13 parallel to the third side 15.

[0060] A protective area is formed between the outer edge 121a and the inner edge 40a. The distance S1 between the outer edge 121a and the inner edge 40a is 0.1mm to 0.5mm, so as to reduce the risk of leakage of packaging materials during processing and improve the space utilization of the package 40 in the first area 121.

[0061] Optionally, the distance S1 between the outer peripheral edge 121a and the inner peripheral edge 40a may be 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, or any other value within the range of 0.1 mm to 0.5 mm.

[0062] Furthermore, a distance S1 between the outer peripheral edge 121 a and the inner peripheral edge 40 a is 0.15 mm to 0.25 mm, so as to further reduce the risk of leakage of the packaging material during processing and improve the space utilization of the package 40 in the first area 121 .

[0063] Continuing with FIG. 3 , in some embodiments, the package 40 includes two first outer sides 41 and two second outer sides 42 . The two first outer sides 41 are disposed opposite each other along the second arrangement direction B, and the two second outer sides 42 are disposed opposite each other along the third arrangement direction C. The first outer sides 41 and the second outer sides 42 are connected end to end. Along the second arrangement direction B, the spacing S2 between the two first outer sides 41 is 3 mm to 10 mm; along the third arrangement direction C, the spacing S3 between the two second outer sides 42 is 2 mm to 10 mm, to facilitate encapsulation of the first electronic component 31 and conform to the shape of the connector 20 .

[0064] Alternatively, the spacing S2 between the two first outer sides 41 may be 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, or any other value within the range of 3 mm to 10 mm. The spacing S3 between the two second outer sides 42 may be 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, or any other value within the range of 2 mm to 10 mm.

[0065] Furthermore, the distance S2 between the two first outer sides 41 is 5 mm to 7 mm; the distance S3 between the two second outer sides 42 is 3 mm to 4 mm, so as to further facilitate covering the first electronic component 31 and adapt to the shape of the connector 20 .

[0066] Please refer to Figure 4. In some embodiments, the package 40 also includes a third outer side 43. Along the first arrangement direction A, the third outer side 43 is located on the side of the first electronic component 31 away from the second surface 12. The first outer side 41 and the second outer side 42 are respectively connected to the third outer side 43. The distance S4 between the end face 311 of the first electronic component 31 away from the second surface and the third outer side 43 is 0.15mm to 5mm. When S4 is too small (less than 0.15mm), it is easy to cause the package thickness of the package 40 to be thin, and the protection of the end face 311 of the first electronic component 31 away from the second surface is weak. When S4 is too large (greater than 5mm), it is easy to cause the package 40 to occupy a large space in the first arrangement direction A, resulting in space waste. By limiting S4 to 0.15mm to 5mm, the protection of the package 40 to the first electronic component 31 can be improved, and the space waste of the package 40 in the first arrangement direction A can be reduced.

[0067] Optionally, the distance S4 between the end surface 311 of the first electronic component 31 away from the second surface and the third outer side surface 43 can be 0.15mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, or any other value in the range of 0.15mm to 5mm.

[0068] Furthermore, a distance S4 between the end surface 311 of the first electronic component 31 away from the second surface and the third outer surface 43 is 0.15 mm to 2.5 mm, so as to further improve the protection of the first electronic component 31 and reduce space waste of the package 40 in the first arrangement direction A.

[0069] Referring to Figure 5 , an embodiment of the present application further provides a battery 200, comprising a battery cell 60 and any of the protective plate assemblies 100 described in the aforementioned embodiments. The first extension section 10a extends away from the battery cell 60. The battery 200 may be, but is not limited to, a secondary battery. A secondary battery is a battery that can be recharged to activate its active materials after discharge for continued use.

[0070] In some embodiments, the battery cell 60 includes an electrode assembly 61, a packaging bag 62, and a tab 63. The electrode assembly 61 is used to convert chemical energy into electrical energy. Specifically, the electrode assembly 61 includes a positive electrode sheet, a separator, and a negative electrode sheet arranged in sequence. Optionally, the positive electrode sheet, separator, and negative electrode sheet are wound or laminated.

[0071] The packaging bag 62 includes a main body 621, in which the electrode assembly 61 is housed, and a packaging portion 622, which is used to seal the main body 621. Optionally, the packaging bag 62 is made of folded aluminum-plastic film, with the main body 621 being the portion of the aluminum-plastic film with the punched holes, and the packaging portion 622 being the portion where the aluminum-plastic film overlaps.

[0072] The main body 621 includes a top wall 621a, and the packaging portion 622 includes a first packaging edge 622a. The first packaging edge 622a is connected to the top wall 621a and extends along a first direction X. The first packaging edge 622a and the top wall 621a are arranged opposite each other along a second direction Z. One end of the tab 63 is electrically connected to the electrode assembly 61, and the other end of the tab 63 extends from the first packaging edge 622a. The first direction X is the thickness direction of the battery cell 60, and the second direction Z is perpendicular to the first direction X. Optionally, the second direction Z is the length direction of the battery cell 60.

[0073] In some embodiments, there are multiple tabs 63 arranged along the third direction Y. The third direction Y, the second direction Z, and the first direction X are perpendicular to each other. Optionally, the third direction Y is the width direction of the battery cell 60 .

[0074] The substrate 50 is located on the side of the first packaging edge 622a away from the top wall 621a. The substrate 50 and the first packaging edge 622a are arranged opposite to each other along the second direction Z. The tab 63 is also connected to the substrate 50 to reduce the space occupied by the substrate 50 at the head of the battery cell 60 in the second direction Z, thereby improving the energy density of the battery 200.

[0075] Continuing with FIG6 , in some embodiments, the protective plate assembly 100 further includes a conductive member 32 and a second electronic component 33. The conductive member 32 and the second electronic component 33 are connected to the side of the substrate 50 facing the first packaging edge 622a to reduce the risk of external impact on the conductive member 32 and the second electronic component 33. The conductive member 32 is connected to the tab 63 to electrically connect the substrate 50 and the battery cell 60.

[0076] The second electronic component 33 and the conductive member 32 are spaced apart, the second electronic component 33 is electrically connected to the first electronic component 31, and the second electronic component 33 and the first electronic component 31 are configured to form a protection circuit. Along the thickness direction of the substrate 50 (i.e., the second direction Z), the height of the second electronic component 33 is 0.1mm to 0.3mm, so that electronic components with lower height can utilize the height space of the conductive member 32 in the second direction Z, thereby improving the space utilization between the substrate 50 and the first packaging edge 622a. Along the first arrangement direction A, the height of the first electronic component 31 is 0.4mm to 0.8mm, so that electronic components with higher height can utilize the space of the mainboard compartment of the electrical equipment, reducing the space occupied by the electronic components at the head of the battery cell 60, which is conducive to improving the energy density of the battery 200. In addition, by arranging the first electronic component 31 and the second electronic component 33 on the first circuit board 10 and the substrate 50 respectively, the risk of interference between the first electronic component 31 and the second electronic component 33 can also be reduced.

[0077] Referring to Figures 5 and 6 , in some embodiments, the conductive member 32 is a U-shaped nickel sheet, and one end of the tab 63 extends into and is connected to the conductive member 32. The battery 200 also includes a first adhesive member 71 connected between the side of the conductive member 32 facing away from the substrate 50 and the first packaging edge 622a to improve the stability of the substrate 50 at the top of the battery cell 60.

[0078] In some embodiments, the first adhesive member 71 includes a first adhesive portion 711 and a plurality of second adhesive portions 712 protruding from one side of the first adhesive portion 711. The side of the first adhesive portion 711 facing away from the second adhesive portion 712 is adhered to the side of the first packaging edge 622a facing the substrate 50. The side of the second adhesive portion 712 facing away from the first adhesive portion 711 is adhered to the side of the conductive member 32 facing away from the substrate 50. The second adhesive portion 712 supports the substrate 50 through the conductive member 32 so that a gap 713 is formed between the area of ​​the first adhesive portion 711 where the second adhesive portion 712 is not provided and the substrate 50. It should be noted that, when viewed along the first direction X, the gap 713 is formed between two adjacent second adhesive portions 712 and / or is formed on the side of the outermost second adhesive portion 712 facing away from the adjacent second adhesive portion 712.

[0079] Along the second direction Z, the projection of the second electronic component 33 is located within the projection of the first adhesive 71 and does not overlap with the projection of the second adhesive portion 712, so that the gap 713 is used as the accommodation space for the second electronic component 33, thereby facilitating the increase in the upper limit of the height of the second electronic component 33 arranged between the substrate 50 and the first packaging edge 622a, and facilitating the layout of the substrate 50.

[0080] Optionally, the number of the conductive member 32 and the number of the second adhesive portions 712 are three respectively, and the three second adhesive portions 712 are arranged at intervals along the third direction Y on one side of the first adhesive portion 711 .

[0081] Referring to Figure 7 , in some embodiments, a second adhesive member 72 is connected to a side of the substrate 50 facing the first packaging edge 622a. The second adhesive member 72 and the conductive member 32 are spaced apart, and the side of the second adhesive member 72 facing away from the substrate 50 is connected to the first packaging edge 622a, thereby improving the stability of the substrate 50 at the top of the battery cell 60. Furthermore, by utilizing the space left by removing the first electronic component 31 from the substrate 50, the second adhesive member 72 can reduce the space occupied by the second adhesive member 72 at the top of the battery cell 60, thereby improving the energy density of the battery 200.

[0082] 8 , in some embodiments, the first packaging edge 622 a is connected to the top wall 621 a and extends along the second direction Z. The first packaging edge 622 a and the substrate 50 are disposed opposite each other along the first direction X. It is understood that the positional relationship between the first packaging edge 622 a and the substrate 50 is similar and will not be described in detail herein.

[0083] Referring to FIG9 , an embodiment of the present application further provides an electric device 300, comprising a motherboard 80 and any of the batteries 200 described in the above embodiments. A connector 20 is electrically connected to the motherboard 80, thereby electrically connecting the battery cell 60 to the motherboard 80. The electric device 300 may be, but is not limited to, an electronic terminal such as a mobile phone, tablet, camera, or drone.

[0084] In some embodiments, the electrical device 300 includes a third electronic component 34, which is connected to the mainboard 80 and electrically connected to the first electronic component 31. The third electronic component 34 and the first electronic component 31 are configured to form a protection circuit to reduce the space occupied by electronic components at the head of the battery cell 60. This also reduces the required layout area of ​​the substrate 50, thereby reducing the thickness of the substrate 50 and facilitating an increase in the energy density of the battery 200.

[0085] In some embodiments, the package 40 contacts external structural parts such as the wall of the mainboard compartment of the electrical equipment 300 to facilitate the transfer of heat from the first circuit board 10 and the first electronic component 31 to the external structural parts, which is beneficial to reducing the temperature rise of the first circuit board 10 and the first electronic component 31.

[0086] In summary, in the protective plate assembly 100, battery 200, and electrical device 300, the connector 20 is connected to the first surface 11 and is configured to electrically connect to an external circuit. The first electronic component 31 is connected to the second surface 12 and is configured to form a protective circuit. The encapsulation 40 is connected to the second surface 12 and encapsulates the first electronic component 31. Along the first arrangement direction A, the projection of the encapsulation 40 overlaps with the projection of the connector 20. This encapsulation 40 enhances the structural strength of the first extension 10a where the connector 20 is located, reducing the risk of damage to the first extension 10a due to forces applied during connection between the connector 20 and the external circuit. Furthermore, when the connector 20 is located in the mainboard compartment of the electrical device and connected to the mainboard, the encapsulation 40 and the first electronic component 31 within it utilize the space within the mainboard compartment. Compared to conventional approaches where the majority of electronic components are mounted on the substrate, this reduces the space occupied by the electronic components at the head of the battery cell 60, thereby improving the energy density of the battery equipped with the protective plate assembly 100.

[0087] In addition, those skilled in the art may also make other changes within the spirit of this application. Of course, these changes made according to the spirit of this application should be included in the scope disclosed in this application.

Claims

1. A protection board assembly, characterized in that, The protection board assembly includes: A first circuit board, including a base portion and a first extension section connected to the base portion. The first extension section protrudes from the base portion. The first extension section includes a first surface and a second surface arranged opposite to each other along a first arrangement direction. A connector connected to the first surface. A first electronic component connected to the second surface. A package connected to the second surface and covering the first electronic component. Along the first arrangement direction, the projection of the package overlaps with the projection of the connector.

2. The protection board assembly according to claim 1, wherein, The protection board assembly further includes a substrate, which is connected to the base portion. One end of the first extension section is close to the substrate, and the other end of the first extension section extends in a direction away from the substrate.

3. The protection board assembly according to claim 2, wherein, The second surface includes a first region and a second region. Along the first arrangement direction, the projections of the connector and the package are both within the projection range of the first region, and the second region is on the side of the first region facing the substrate.

4. The protection board assembly according to claim 3, characterized in that, When observed along the first arrangement direction, the package includes an inner peripheral edge, and the first region includes an outer peripheral edge. The outer peripheral edge surrounds the circumferential side of the inner peripheral edge, and the distance between the outer peripheral edge and the inner peripheral edge is 0.1 mm to 0.5 mm.

5. The protection board assembly according to claim 1, characterized in that, The package includes two first outer side surfaces and two second outer side surfaces. The two first outer side surfaces are arranged opposite to each other along a second arrangement direction, and the two second outer side surfaces are arranged opposite to each other along a third arrangement direction. The first outer side surfaces and the second outer side surfaces are connected end to end in sequence. The first arrangement direction, the second arrangement direction, and the third arrangement direction are perpendicular to each other. Along the second arrangement direction, the distance between the two first outer side surfaces is 3 mm to 10 mm. Along the third arrangement direction, the distance between the two second outer side surfaces is 2 mm to 10 mm.

6. The protection board assembly according to claim 1, characterized in that, The package further includes a third outer side surface. Along the first arrangement direction, the third outer side surface is located on the side of the first electronic component away from the second surface, and the distance between the end surface of the first electronic component away from the second surface and the third outer side surface is 0.15 mm to 5 mm.

7. The protection board assembly according to claim 1, characterized in that, The Shore hardness of the package is greater than 40.

8. The protection board assembly according to claim 1, wherein, The first electronic component includes at least one of an anti-counterfeiting chip, a capacitor, and a resistor.

9. The protection board assembly according to claim 2, characterized in that The first circuit board further includes a second extension section. The base portion and the substrate are arranged opposite to each other. The second extension section is bent and connected between the substrate and the base portion. The first extension section is connected to one end of the base portion away from the second extension section.

10. The protection board assembly according to claim 2, characterized in that, The substrate includes a second circuit board and a reinforcing board connected to the second circuit board. The second circuit board and the base portion are respectively located on opposite sides of the reinforcing board, and the second circuit board and the first circuit board are integrally provided.

11. A battery, characterized in that, Including an electric core and the protection board assembly according to any one of claims 1 to 10, the protection board assembly is arranged on one side of the electric core and electrically connected to the electric core, and the first extension section extends in a direction away from the electric core.

12. The battery according to claim 11, characterized in that, The battery cell includes an electrode assembly, a packaging bag, and an electrode tab. The packaging bag includes a main body portion and a sealing portion. The electrode assembly is received in the main body portion. The main body portion includes a top wall. The sealing portion includes a first sealing edge. The first sealing edge is connected to the top wall and extends along a first direction. The first sealing edge and the top wall are disposed opposite to each other along a second direction. One end of the electrode tab is electrically connected to the electrode assembly, and the other end of the electrode tab extends out from the first sealing edge. The first direction is the thickness direction of the battery cell, and the second direction is perpendicular to the first direction. The protection board assembly further includes a substrate. The first circuit board is connected to the substrate. The substrate is located on a side of the first sealing edge away from the top wall. The substrate and the first sealing edge are disposed opposite to each other along the second direction. The electrode tab is also connected to the substrate.

13. The battery according to claim 12, characterized in that, The protection board assembly further includes a conductive member and a second electronic component. The conductive member and the second electronic component are connected to a side of the substrate facing the first sealing edge. The conductive member is connected to the electrode tab. The second electronic component and the conductive member are spaced apart. The second electronic component is electrically connected to the first electronic component. Along the thickness direction of the substrate, the height of the second electronic component is from 0.1 mm to 0.3 mm. Along the first arrangement direction, the height of the first electronic component is from 0.4 mm to 0.8 mm.

14. An electrical device, characterized in that, The electrical device includes a main board and a battery according to any one of claims 11 to 13. The connector is electrically connected to the main board.

15. The electrical device according to claim 14, characterized in that, The electrical device includes a third electronic component. The third electronic component is connected to the main board and is electrically connected to the first electronic component.

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