Protective plate and battery

Abstract

The utility model relates to the field of battery structures, in particular to a protection plate and a battery. The protection plate is used for being connected with a tab of a battery cell and comprises a flexible circuit board and a hard circuit board; the flexible circuit board comprises a fixed part and a first bent part which are connected with each other, and the thickness direction of the fixed part is the same as the length direction of the battery cell; a gap is formed between the first bending part and the fixing part; the first bending parts are correspondingly connected with the tabs; the hard circuit board is located in the gap; the hard circuit board comprises a substrate and an electronic device group, one side of the substrate is connected with the fixing part, and the electronic device group is installed on the other side of the substrate. According to the protection plate provided by the invention, the first bending part connected with the tab is arranged on the flexible circuit board, so that the space for arranging the device of the substrate can be increased, and the hard circuit board is changed from a double-sided cloth device to a single-sided cloth device, so that the thickness of the hard circuit board is reduced, and the length of the protection plate is further reduced.

Description

Technical Field

[0001] The present application relates to the field of battery structure, and in particular to a protection plate and a battery. Background Art

[0002] At present, the increase in mobile phone display size, multi-camera high-definition photography, 4K / 8K high-definition video playback, multi-communication frequency band compatibility, high-speed communication and computing and other hardware and functional improvements have put some pressure on mobile phone battery life. Before a greater breakthrough in battery cell materials is achieved, it is usually necessary to reduce the battery packaging space to obtain a larger battery cell size, thereby increasing the battery cell size and battery capacity.

[0003] The existing technology has become the mainstream assembly structure through pre-folding the top seal and placing the printed circuit board vertically. However, the nickel sheet pads connected to the battery cell occupy a large amount of space on the printed circuit board, resulting in a reduction in the space for placing electronic components on the printed circuit board. It is necessary to lay parts on both sides of the printed circuit board, which in turn increases the length and packaging size of the battery pack, resulting in the battery capacity cannot be increased. Utility Model Content

[0004] The purpose of the present application is to provide a protection board and a battery, which can reduce the length packaging size of the battery pack and increase the battery capacity.

[0005] The present application provides a protection board for connecting to a tab of a battery cell, wherein the protection board includes a flexible circuit board and a hard circuit board;

[0006] The flexible circuit board comprises a fixed portion and a first bent portion connected to each other, the thickness direction of the fixed portion is parallel to the length direction of the battery cell; there is a gap between the first bent portion and the fixed portion; the first bent portion is correspondingly connected to the tab;

[0007] The rigid circuit board is located in the gap; the rigid circuit board comprises a substrate and an electronic component group, one side of the substrate is connected to the fixing part, and the electronic component group is installed on the other side of the substrate.

[0008] In the above technical solution, further, the first bending portion is located on a side of the fixing portion close to the battery core.

[0009] In the above technical solution, further, the flexible circuit board is provided with a plurality of the rigid circuit boards, and the plurality of rigid circuit boards are arranged at intervals along the length direction of the flexible circuit board.

[0010] In the above technical solution, further, the electronic device group includes a first electronic device and a second electronic device, and the thickness of the first electronic device is smaller than the thickness of the second electronic device;

[0011] The substrate is provided with a first welding area and a second welding area; the first welding area is opposite to the first bending portion, and the first electronic device is located in the first welding area; the second welding area is misaligned with the first bending portion, and the second electronic device is located in the second welding area.

[0012] In the above technical solution, further, the thickness of the first electronic device is between 0.1 mm and 1.2 mm; and / or the thickness of the second electronic device is between 0.4 mm and 1.5 mm.

[0013] In the above technical solution, further, a tab pad is provided on a side of the first bent portion facing the battery cell, and the first bent portion is connected to the tab via the tab pad.

[0014] In the above technical solution, further, a circuit board pad is provided on a side of the fixing portion facing the battery core, and the fixing portion is connected to the hard circuit board through the circuit board pad.

[0015] In the above technical solution, further, the flexible circuit board also includes a second bending portion; the second bending portion is connected to the fixing portion, and the second bending portion is provided with a connector pad.

[0016] The present application also provides a battery, comprising the protection plate described in the above solution.

[0017] In the above technical solution, further, when the number of the battery cells is multiple, the multiple battery cells are arranged in sequence along the width direction of the battery cells, the first bending portion is located on the side of the fixing portion close to the battery cell, and the fixing portion is opposite to the tab lead-out surfaces of the multiple battery cells; the protruding height of the side seal of the battery cell does not exceed the side of the fixing portion close to the battery cell.

[0018] In the above technical solution, further, it also includes a protection body;

[0019] The protective body is arranged on the tab lead-out surface of the battery cell, and the protective body wraps the hard circuit board, the fixing portion and the first bending portion.

[0020] In the above technical solution, further, the lead-out surface of the tab is provided with a top seal, the top seal is bent toward the lead-out surface of the tab, and the tab extends from the top seal; the battery also includes insulating tape, and the insulating tape is provided between the top seal and the hard circuit board.

[0021] Compared with the prior art, the beneficial effects of this application are:

[0022] The protection plate provided in the present application can increase the space for arranging devices on the substrate by providing a first bending portion connected to the pole ear on the flexible circuit board, so that the hard circuit board is changed from a double-sided device to a single-sided device, thereby reducing the thickness of the hard circuit board and further reducing the length of the protection plate; and the arrangement of the hard circuit board utilizes the protruding structure of the side edge sealing, and the structural layout is more compact and reasonable.

[0023] The present application also provides a battery, including the protection plate described in the above solution. Based on the above analysis, it can be seen that the battery also has the above beneficial effects, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the first internal structure of the protection plate provided in this application;

[0026] Figure 2 A schematic diagram of the second internal structure of the protection plate provided in this application;

[0027] Figure 3 A third schematic diagram of the internal structure of the protection plate provided in this application;

[0028] Figure 4 Schematic diagram of the split structure of the protection plate provided in this application;

[0029] Figure 5 Schematic diagram of the assembly structure of the protection board and the battery cell provided in this application.

[0030] In the figure: 101-battery cell; 102-ear lead-out surface; 103-ear; 104-flexible circuit board; 105-rigid circuit board; 106-fixing part; 107-first bending part; 108-gap; 109-substrate; 110-side edge sealing; 111-first electronic device; 112-second electronic device; 113-second bending part; 114-third bending part; 115-protective body; 116-insulating tape. DETAILED DESCRIPTION

[0031] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] Embodiment 1

[0035] The protection board provided in the present application is used for the tab lead-out surface 102 of the battery cell 101, the protection board is electrically connected to the tab 103, and the protection board is equipped with a protection circuit for controlling the charging and discharging of the battery, which can prevent the battery from being overcharged and overheated during use, thereby ensuring the working stability and safety of the terminal equipment. The protection board of the present application has a smaller size in the battery packaging length, which can at least reduce the packaging length of the battery head by 0.5mm, thereby increasing the length of the packaged battery cell while keeping the battery length unchanged, thereby increasing the battery capacity density.

[0036] See also Figures 1 to 5As shown, the protection board includes a flexible circuit board 104 and a hard circuit board 105; the flexible circuit board 104 includes a fixed portion 106 and a first bent portion 107 connected to each other, and the flexible circuit board 104 is placed horizontally so that the thickness direction of the fixed portion 106 is parallel to the length direction of the battery cell 101; there is a gap 108 between the first bent portion 107 and the fixed portion 106; the first bent portion 107 is correspondingly connected to the pole ear 103 bent toward the pole ear lead-out surface 102; the hard circuit board 105 is located in the gap 108; the hard circuit board 105 includes a substrate 109 and an electronic device group, one side of the substrate 109 is connected to the fixed portion 106, and the electronic device group is installed on the other side of the substrate 109.

[0037] Specifically, the present application includes a fixing portion 106 and a first bending portion 107 on the flexible circuit board 104, and the fixing portion 106 is connected to the rigid circuit board 105 to install and fix the rigid circuit board 105. The tab 103 is bent after extending from the tab lead-out surface 102 and connected to the first bending portion 107, which can avoid the tab pad connected to the tab 103 from occupying the space of the substrate 109 of the rigid circuit board 105, so that the space where the electronic device can be placed is increased, so that the electronic device can be arranged on one side on the substrate. The hard circuit board 105 is a printed circuit board (hard board). The total thickness of the hard circuit board 105 is determined by the thickness / height of the substrate 109 and the electronic devices on the substrate 109. Obviously, the single-sided arrangement of the electronic devices reduces the total thickness of the hard circuit board 105, and the thickness direction of the fixing portion 106 is parallel to the length direction of the battery cell 101, that is, the hard circuit board 105 is placed horizontally compared to the tab lead-out surface 102. The thinner hard circuit board 105 reduces the impact on the battery package length.

[0038] Since the flexible circuit board 104 is a printed circuit board made of polyimide or polyester film as a substrate, the insulating film forms the basic insulating layer of the circuit, and the copper foil can be bonded to the insulating layer by an adhesive. The insulating layer on the surface of the first bending portion 107 can be removed to expose the conductive copper foil inside, and the copper foil can be connected to the tab 103 to achieve electrical connection between the two. Compared with the solution in the prior art that the rigid circuit board 105 needs to be electrically connected to the tab 103 by setting a nickel sheet, the present application uses a flexible circuit board 104 to connect with the tab 103, which can reduce the volume of the device.

[0039] In an optional solution of this embodiment, the first bent portion 107 is located on the side of the fixed portion 106 close to the tab lead-out surface 102 where the tab 103 is located, wherein the tab lead-out surface 102 refers to the head of the battery cell. Similarly, the first bent portion 107 can also be located on the side of the fixed portion 106 away from the tab lead-out surface 102. In this case, the tab needs to be connected to the first bent portion 107 from the tab lead-out surface 102 and around the fixed portion 106, while the hard circuit board 105 is located on the side of the fixed portion 106 away from the tab lead-out surface 102.

[0040] Furthermore, the flexible circuit board 104 is provided with a plurality of rigid circuit boards 105 , and the plurality of rigid circuit boards 105 are arranged at intervals along the length direction of the flexible circuit board 104 .

[0041] like Figure 1 and Figure 2 As shown, when the battery cell 101 is packaged, after the top seal is extended and bent toward the head, protruding side seal edges 110 are formed at both ends of the tab lead-out surface 102 of the battery cell 101 . In the present application, the fixed portion 106 of the flexible circuit board 104 is spaced apart from the pole ear lead-out surface 102, and multiple hard circuit boards 105 are connected to the lower surface of the fixed portion 106 (i.e., the side close to the pole ear lead-out surface 102), and the first bent portion 107 connected to the pole ear 103 is also located below the fixed portion 106. Several hard circuit boards 105 can be correspondingly arranged on one battery cell, in conjunction with the design of dual batteries or multiple batteries, and the interval between at least two adjacent hard circuit boards 105 corresponds to the side edge seal 110 between two adjacent battery cells, so that the flexible circuit board 104 and the hard circuit board 105 can avoid the side edge seal 110, that is, the pole ear 103, the first bent portion 107 and the hard circuit board 105 can all be within the range enclosed by the battery cell 101, the two side edge seals 110 and the longer fixed portion 106, making full use of the protruding structure of the side edge seal 110, so that the above-mentioned structure does not need to increase the battery packaging length, and the structural layout is more compact and reasonable.

[0042] The protection plate provided in the present application can increase the space of the substrate 109 by providing a first bending portion 107 connected to the pole ear 103 on the flexible circuit board 104, so that the hard circuit board 105 is changed from a double-sided device to a single-sided device, thereby reducing the thickness of the hard circuit board 105 and further reducing the length of the protection plate; and the arrangement of the hard circuit board 105 utilizes the protruding structure of the side sealing edge 110, and the structural layout is more compact and reasonable.

[0043] In an optional solution of this embodiment, the electronic device group includes a first electronic device 111 and a second electronic device 112, the thickness of the first electronic device 111 is less than the thickness of the second electronic device 112; the substrate 109 is provided with a first welding area and a second welding area; the first welding area is opposite to the first bending portion 107, and the first electronic device 111 is located in the first welding area; the second welding area is misaligned with the first bending portion 107, and the second electronic device 112 is located in the second welding area. Specifically, the projections of the first bending portion 107 and the first electronic device 111 on the fixing portion 106 both fall into the first welding area, and the projection of the second electronic device 112 on the fixing portion 106 falls into the second welding area.

[0044] In this embodiment, specifically, the substrate 109 of the rigid circuit board 105 includes multiple routing layers, and the number of routing layers is between 2 and 10. The thickness of the substrate 109 is between 0.4 mm and 1.5 mm. A flexible circuit board pad welded to the flexible circuit board 104 is provided on one side of the substrate 109, and an electronic device pad welded to the electronic device group is provided on the other side of the substrate 109.

[0045] Further, the electronic device group includes a plurality of electronic devices, and the electronic devices are placed in different areas according to thickness. Figures 1 to 3 As shown, at the position of the first bending portion 107, since the first bending portion 107 and the tab 103 occupy the space above the tab lead-out surface 102, the gap between the substrate 109 and the first bending portion 107 is small, so the first electronic device 111 with a relatively thin thickness can be installed in the first welding area opposite to the first bending portion 107. On the left and right sides of the first bending portion 107, the space above the tab lead-out surface 102 is relatively large, and the gap between the substrate 109 and the tab lead-out surface 102 is large, so the second electronic device 112 with a relatively thick thickness can be installed in the second welding area displaced from the first bending portion 107. The height difference formed by the electronic device is used to set the position of the corresponding pad, so as to realize the reasonable arrangement of the electronic device and reduce the volume of the device.

[0046] In an optional solution of this embodiment, the thickness of the first electronic device 111 is between 0.1 mm and 1.2 mm; the thickness of the second electronic device 112 is between 0.4 mm and 1.5 mm. For example, when the thickness of the second electronic device 112 is 1.0 mm, the thickness of the first electronic device 111 can be any thickness between 0.1 mm and 0.8 mm.

[0047] In an optional solution of this embodiment, the first bent portion 107 corresponds to the tab 103 one by one; a tab pad is provided on the side of the first bent portion 107 facing the tab lead-out surface 102 .

[0048] In this embodiment, the number and position of the first bending portions 107 need to be determined according to the number and position of the tabs 103. Figures 1 to 4 As shown, for the two battery cells 101 shown in the figure, each battery cell 101 has a positive electrode tab and a negative electrode tab, the total number of tabs 103 led out of the two battery cells 101 is four, the number of first bending portions 107 is also correspondingly set to four, and the positions of the first bending portions 107 correspond to the positions of each tab 103 respectively.

[0049] Specifically, the flexible circuit board 104 includes at least two wiring layers. The insulating layer at the first bending portion 107 is removed to expose the conductive copper foil inside, thereby forming a tab pad. Preferably, in order to prevent the copper material of the tab pad from being oxidized, nickel plating, gold plating or other materials that can enhance the anti-oxidation ability can be used.

[0050] In an optional solution of this embodiment, the flexible circuit board 104 further includes a second bending portion 113 ; the second bending portion 113 is connected to the fixing portion 106 , and the second bending portion 113 is provided with a connector pad.

[0051] In this embodiment, the second bending portion 113 is provided with a connector pad for welding a BTB connector, i.e., a Back-To-Back connector, a board-to-board connector. The BTB connector is used to electrically connect the battery to the motherboard of the terminal device, and the battery can supply power to related devices of the terminal device through the motherboard.

[0052] like Figures 1 to 5 As shown, the second bending portion 113 is plate-shaped, and the plate surface of the second bending portion 113 extends in the length direction of the plate-shaped battery cell 101. When the second bending portion 113 is assembled with the main board, it is inevitable to stretch the second bending portion 113. A third bending portion 114 is also provided between the second bending portion 113 and the fixing portion 106. The third bending portion 114 is located at one end of the fixing portion 106 in the length direction and is bent upward. The third bending portion 114 provides a stretch margin for the second bending portion 113 to avoid pulling the internal components during assembly and causing damage.

[0053] Embodiment 2

[0054] Embodiment 2 of the present application provides a battery, including a protective plate of any of the above embodiments, and thus has all the beneficial technical effects of the protective plate of any of the above embodiments, which will not be described in detail herein.

[0055] In an optional scheme of this embodiment, when the number of battery cells 101 is multiple, the multiple battery cells 101 are arranged in sequence along the width direction of the battery cells, and the first bending portion 107 is located on the side of the fixing portion 106 close to the pole tab lead-out surface 102, and the fixing portion 106 is opposite to the pole tab lead-out surfaces 102 of the multiple battery cells 101; the protruding height of the side sealing edge 110 is less than the thickness of the hard circuit board 105, that is, the fixing portion 106 is located above the side sealing edge 110 to form an avoidance.

[0056] In this embodiment, in actual application, there may be two or more cells 101 connected to the protection board. Figure 1 and Figure 2 As shown, the number of battery cells 101 connected to the protection board is two, and the two battery cells 101 are arranged in sequence along the width direction of the battery cells. The length of the fixing portion 106 is adapted to the tab lead-out surfaces 102 of the two battery cells 101, so that the fixing portion 106 is opposite to the tab lead-out surfaces 102 of the two battery cells 101, and two circuit boards are correspondingly arranged on the side of the fixing portion 106 facing the tab lead-out surface 102. And the flexible circuit board 104 needs to bridge the side seal 110 between the two battery cells 101. The present application stipulates that the protruding height of the side seal 110 does not exceed the side of the fixing portion 106 facing the tab lead-out surface 102, that is, the flexible circuit board 104 can be prevented from interfering with the side seal 110 as a whole, so that the overall layout of the protection board is more reasonable and compact.

[0057] See also Figure 4 and Figure 5 As shown, in an optional scheme of this embodiment, the battery also includes a protective body 115; the protective body 115 is arranged on the pole tab lead-out surface 102 and is in contact with the pole tab lead-out surface 102, and the protective body 115 wraps the hard circuit board 105, the fixing portion 106 and the first bending portion 107; at least a portion of the second bending portion 113 passes through the protective body 115 to be connected to an external mainboard.

[0058] In this embodiment, at the top sealing position of the battery cell 101, a protective body 115 is formed on the outer surface of the rigid circuit board 105, the fixing portion 106 and the first bending portion 107 by low-pressure injection molding, so that the protective body 115 can completely cover the rigid circuit board 105, the fixing portion 106 and the first bending portion 107, and at least part of the second bending portion 113, such as the connector pad and the provided connector, will be exposed outside the protective body 115, so that it can be connected to an external device such as a terminal device; optionally, the protective body 115 can be an insulating material such as foam, PI (Polyimide) or PET (Polyethylene terephthalate). The protective body 115 is used to protect the electronic devices arranged on the circuit board, thereby reducing the probability of the electronic devices being hit, and providing a buffering effect when being hit, thereby reducing the risk of the electronic devices falling off and being damaged.

[0059] In the optional solution of this embodiment, the lead-out surface of the tab is provided with a top seal, the top seal is bent toward the head of the battery cell, and the tab extends from the top seal; the battery also includes an insulating adhesive tape 116, an insulating adhesive tape 116 is provided between the top seal and the hard circuit board 105, an insulating adhesive tape 116 is provided between the tab and the top seal, and an insulating adhesive tape 116 is also provided between the hard circuit board 105 and the top seal. The insulating adhesive tape 116 is provided between the tab and the top seal, and the insulating adhesive tape 116 is provided between the hard circuit board 105 and the top seal to isolate the hard circuit board 105 and the tab 103 from the battery cell 101 to avoid contact and short circuit.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application. In addition, a person skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means being within the scope of the present application and forming different embodiments.

Claims

1. A protection plate, used for connecting to a tab (103) of a battery cell (101), characterized in that: The protection plate comprises a flexible circuit board (104) and a hard circuit board (105); The flexible circuit board (104) comprises a fixed portion (106) and a first bent portion (107) connected to each other, the thickness direction of the fixed portion (106) is parallel to the length direction of the battery cell (101); there is a gap (108) between the first bent portion (107) and the fixed portion (106); the first bent portion (107) is correspondingly connected to the tab (103); The hard circuit board (105) is located in the gap (108); the hard circuit board (105) comprises a substrate (109) and an electronic component group, one side of the substrate (109) is connected to the fixing portion (106), and the electronic component group is installed on the other side of the substrate (109).

2. The protection plate according to claim 1, characterized in that: The first bent portion (107) is located on a side of the fixing portion (106) close to the battery core.

3. The protection plate according to claim 1 or 2, characterized in that: The flexible circuit board (104) is provided with a plurality of the rigid circuit boards (105), and the plurality of rigid circuit boards (105) are arranged at intervals along the length direction of the flexible circuit board (104).

4. The protection plate according to claim 1, characterized in that: The electronic device group comprises a first electronic device (111) and a second electronic device (112), wherein the thickness of the first electronic device (111) is smaller than the thickness of the second electronic device (112); The substrate (109) is provided with a first welding area and a second welding area; the first welding area is opposite to the first bending portion (107), and the first electronic device (111) is located in the first welding area; the second welding area is offset from the first bending portion (107), and the second electronic device (112) is located in the second welding area.

5. The protection plate according to claim 4, characterized in that: The thickness of the first electronic device (111) is between 0.1 mm and 1.2 mm; and / or the thickness of the second electronic device (112) is between 0.4 mm and 1.5 mm.

6. The protection plate according to claim 2, characterized in that: A pole tab pad is provided on the side of the first bent portion (107) facing the battery core, and the first bent portion (107) is connected to the pole tab (103) via the pole tab pad.

7. The protection plate according to claim 2, characterized in that: A circuit board pad is provided on the side of the fixing portion (106) facing the battery core, and the fixing portion (106) is connected to the hard circuit board (105) via the circuit board pad.

8. The protection plate according to claim 1, characterized in that: The flexible circuit board (104) further comprises a second bending portion (113); the second bending portion (113) is connected to the fixing portion (106), and the second bending portion (113) is provided with a connector pad.

9. A battery, characterized in that: It comprises a battery cell (101) and a protection plate as claimed in any one of claims 1 to 8.

10. The battery according to claim 9, characterized in that When there are multiple battery cells (101), the multiple battery cells (101) are arranged in sequence along the width direction of the battery cells, the first bent portion (107) is located on a side of the fixing portion (106) close to the battery cells, and the fixing portion (106) is opposite to the tab lead-out surfaces (102) of the multiple battery cells (101); and the protruding height of the side seal of the battery cell (101) does not exceed the side of the fixing portion close to the battery cell.

11. The battery according to claim 9 or 10, characterized in that: Also includes a protection body (115); The protective body (115) is arranged on the tab lead-out surface (102) of the battery cell, and the protective body (115) wraps the hard circuit board (105), the fixing portion (106) and the first bending portion (107).

12. The battery according to claim 11, characterized in that The tab lead-out surface (102) is provided with a top seal, the top seal is bent toward the tab lead-out surface (102), and the tab (103) extends out from the top seal; the battery also includes insulating adhesive paper (116), and the insulating adhesive paper (116) is provided between the top seal and the hard circuit board (105).

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