Battery and electric equipment

Abstract

The invention relates to the technical field of energy storage, and discloses a battery and electric equipment, the battery comprises a battery cell and a protection plate assembly, and the battery cell comprises an electrode assembly, a packaging bag and a tab. The electrode assembly is arranged in the packaging bag, one end of the tab is connected to the electrode assembly, and the other end extends out of the top of the packaging bag. The protection plate assembly is arranged at the top of the packaging bag and comprises a first circuit board, a second circuit board and a reinforcing part. The first circuit board comprises a first surface and a second surface which are oppositely arranged along a first arrangement direction, the tab is connected to the first surface, and the reinforcing piece is connected to the second surface. The second circuit board comprises a first part and a second part, one end of the first part is connected with the first circuit board, the other end of the first part is connected with one end of the second part, and the other end of the second part is connected with an external circuit. Along the first arrangement direction, the second part and the second surface are oppositely arranged, and the reinforcing member and the second circuit board are arranged at an interval. The first arrangement direction is the thickness direction of the first circuit board. The reinforcement supports the first circuit board to facilitate thinning of the battery.

Description

Technical Field

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

[0002] As the market for thin and light electrical devices such as foldable screen mobile phones gradually increases, the batteries in electrical devices are gradually becoming thinner. However, due to the structural design of the relevant circuit board currently set at the head of the battery, the thickness of the head of the battery limits the overall thickness of the battery. Therefore, a new solution is needed to thin the battery. Summary of the invention

[0003] In view of this, the present application provides a battery that is conducive to reducing thickness.

[0004] In a first aspect of the present application, a battery is provided, the battery comprising a battery cell and a protective plate assembly, the battery cell comprising an electrode assembly, a packaging bag and a pole ear. The electrode assembly is arranged in the packaging bag, one end of the pole ear is connected to the electrode assembly, and the other end of the pole ear extends out of the top of the packaging bag. The protective plate assembly is arranged at the top of the packaging bag, and the protective plate assembly comprises a first circuit board, a second circuit board and a reinforcement. The first circuit board comprises a first surface and a second surface arranged opposite to each other along a first arrangement direction, the pole ear is connected to the first surface, and the reinforcement is connected to the second surface. The second circuit board comprises a first part and a second part, one end of the first part is connected to the first circuit board, the other end of the first part is connected to one end of the second part, and the other end of the second part is connected to an external circuit. Along the first arrangement direction, the second part is arranged opposite to the second surface, and the reinforcement is arranged at a distance from the second circuit board. The first arrangement direction is the thickness direction of the first circuit board.

[0005] In the above embodiment, the reinforcing member supports the first circuit board, so that the first circuit board still has sufficient strength after being thinned, and thinning the first circuit board is conducive to thinning the protection plate assembly arranged on the top of the packaging bag, thereby facilitating thinning of the battery head. In addition, the reinforcing member and the second circuit board are arranged at intervals along the first arrangement direction, so that the reinforcing member and the second circuit board do not overlap in the first arrangement direction, thereby facilitating thinning of the battery.

[0006] In one or more of the above embodiments, the second circuit board is a flexible circuit board, and the second portion is provided with a connector configured to be electrically connected to an external circuit.

[0007] In the above embodiment, the second circuit board is a flexible circuit board, which is beneficial to enhance the mobility of the connector relative to the battery cell, thereby facilitating the connector to flexibly connect to the external circuit.

[0008] In one or more of the above embodiments, the first surface includes a fabric area, and the fabric area is provided with electronic components. Along the first arrangement direction, the reinforcing piece overlaps with the fabric area.

[0009] In the above embodiment, the reinforcing piece can support part of the fabric area, which is beneficial to increase the strength of the fabric area, thereby facilitating the arrangement of the electronic components on the first circuit board.

[0010] In one or more of the above embodiments, along the first arrangement direction, the projection of the fabric area is located within the projection range of the reinforcement member.

[0011] In the above embodiment, the reinforcing piece can support the entire fabric area, which is beneficial to further increase the strength of the fabric area, thereby making it easier to arrange the electronic components on the first circuit board.

[0012] In one or more of the above embodiments, along the first arrangement direction, the reinforcing member overlaps with the tab.

[0013] In the above embodiment, the reinforcing member can support the area on the first circuit board that is connected to the tab, thereby facilitating the connection between the tab and the first circuit board.

[0014] In one or more of the above embodiments, the packaging bag includes a packaging bag body and a packaging portion. The packaging bag body includes a top wall, a first side wall and a second side wall. The packaging portion includes a top seal portion, a first side seal portion and a second side seal portion. The top seal portion is connected to the top wall, the first side seal portion is connected to the first side wall and is bent toward the first side wall, and the second side seal portion is connected to the second side wall and is bent toward the first side wall. The top seal portion is connected to the first side seal portion and forms a first corner seal portion, and the top seal portion is connected to the second side seal portion and forms a second corner seal portion. The pole ear includes a first pole ear and a second pole ear, and the first pole ear and the second pole ear are arranged at intervals in the top seal portion along the second direction. The fabric area includes a first sub-fabric area, and along the first arrangement direction, the first sub-fabric area is located between the first pole ear and the first corner seal portion. The reinforcement overlaps with the first sub-fabric area.

[0015] In the above embodiment, the reinforcement piece is configured to reinforce the fabric area. Along the first arrangement direction, the fabric area is arranged between the first pole ear and the first corner seal portion, so that the reinforcement piece arranged on the second surface is correspondingly located between the first pole ear and the first corner seal portion, thereby making the second surface have a larger width to accommodate the second part, thereby increasing the flexibility of the second part to facilitate the connection of the external circuit.

[0016] In one or more of the above embodiments, along the second direction, the first pole tab and the second pole tab are located on the same side of the center plane of the packaging bag body. Along the first arrangement direction, the reinforcing member is spaced apart from the first pole tab and the second pole tab. The center plane is a symmetric plane of the packaging bag body along the second direction, and the center plane is perpendicular to the second direction.

[0017] In the above embodiment, the first pole lug and the second pole lug provided on the first surface are offset to the same side of the central surface of the packaging bag body, and the electronic component is located on the other side of the first surface. Along the first arrangement direction, the reinforcement overlaps with the electronic component, and the second part overlaps with the first pole lug and the second pole lug, thereby reserving more extended position for the second part of the second circuit board to facilitate the connection of the second part with the external circuit.

[0018] In one or more of the above embodiments, the fabric area further includes a second sub-fabric area. Along the first arrangement direction, the second sub-fabric area is located between the first pole lug and the second pole lug, the reinforcing member overlaps with the second sub-fabric area, the reinforcing member is spaced from the second pole lug, and the second portion overlaps with the second pole lug.

[0019] In the above embodiment, the reinforcing member is spaced apart from the second tab along the first arrangement direction, and the second portion overlaps with the second tab along the first arrangement direction, which is beneficial for the second portion of the second circuit board to extend toward the center plane, thereby facilitating connection of the second portion with an external circuit.

[0020] In one or more of the above embodiments, the first portion includes a first extension section and a first bending section. The first bending section connects the first extension section and the second portion, and the first extension section and the second portion are arranged opposite to each other along the first arrangement direction. The first surface is provided with a connecting pad, and the first extension section is welded to the first surface through the connecting pad. Along the first arrangement direction, the second portion overlaps with the first extension section, and the first extension section is spaced apart from the tab.

[0021] In one or more of the above embodiments, the first portion includes a first extension section and a first bending section. The first bending section connects the first extension section and the second portion, and the first extension section and the second portion are arranged opposite to each other along the first arrangement direction. The first circuit board also includes a third surface, the third surface connects the first surface and the second surface, and the first extension section connects the third surface. Along the first arrangement direction, the second portion overlaps the first extension section. Both the first circuit board and the second circuit board are flexible circuit boards, and the first circuit board and the second circuit board are arranged integrally.

[0022] In the above embodiment, since the first circuit board and the second circuit board are integrally arranged, there is no need to reserve an area on the first surface for connecting the first circuit board and the second circuit board, which is beneficial to reducing the width of the battery cell.

[0023] In one or more of the above embodiments, the number of wiring conductive layers of the second circuit board is less than the number of wiring conductive layers of the first circuit board, the thickness of the second circuit board is less than the thickness of the first circuit board, and the thickness of the reinforcement is less than the thickness of the first circuit board.

[0024] In the above embodiment, the first circuit board has more wiring conductive layers and is thicker, that is, the first circuit board has a higher strength, which is conducive to arranging more traces electrically connected to electronic components on the first circuit board. At the same time, when the reinforcement member is spaced apart from the first pole lug and / or the second pole lug along the first arrangement direction, that is, the reinforcement member does not reinforce the area of ​​the first circuit board corresponding to the first pole lug and / or the second pole lug, the higher strength of the first circuit board is conducive to the connection of the first pole lug and / or the second pole lug to the first circuit board.

[0025] In one or more of the above embodiments, the packaging bag includes a packaging bag body and a packaging portion, the packaging bag body includes a top wall, the packaging portion includes a top sealing portion, and the top sealing portion is connected to the top wall. The top sealing portion includes a first sub-segment and a second sub-segment, one end of the first sub-segment is connected to the top wall, and the other end of the first sub-segment is connected to the second sub-segment. The thickness of the first sub-segment is less than the thickness of the second sub-segment, and the thickness difference between the second sub-segment and the first sub-segment is 0.1mm to 1mm. The tab extends out of the second sub-segment and bends toward the top wall. The bent tab is connected to the first surface through an adapter, and the adapter includes a first connecting segment, a second bending segment, and a second connecting segment connected in sequence. The first connecting segment is connected to the tab, and the second connecting segment is connected to the first surface. Along the first arrangement direction, the second sub-segment and the first connecting segment are spaced apart.

[0026] In the above embodiment, the space occupied by the reinforcing member and the second circuit board in the first arrangement direction is substantially equal, and there is no stacking of the reinforcing member and the second circuit board in the first arrangement direction, which is beneficial for making the battery head more compact, thereby facilitating improving the energy density of the battery.

[0027] In one or more of the above embodiments, the thickness of the first circuit board is 0.25 mm to 0.45 mm, and the thickness of the second circuit board is 0.12 mm to 0.25 mm.

[0028] In the above embodiment, the first circuit board and the second circuit board can be made thinner, which is beneficial to further thinning the battery head, thereby facilitating further thinning the battery.

[0029] In a second aspect of the present application, there is provided an electrical device, comprising an electrical main body, the electrical device further comprising a battery as described in any one of the embodiments of the first aspect of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A front view of a battery provided in accordance with the first embodiment of the present application.

[0031] Figure 2 A rear view of the battery provided in the first embodiment of the present application.

[0032] Figure 3 This is a three-dimensional schematic diagram of the battery provided in the first embodiment of the present application at a first viewing angle.

[0033] Figure 4 A front view of a battery provided in accordance with the second embodiment of the present application.

[0034] Figure 5 A rear view of a battery provided in accordance with the second embodiment of the present application.

[0035] Figure 6 A schematic three-dimensional diagram of a battery provided in the second embodiment of the present application at a first viewing angle.

[0036] Figure 7 A front view of a battery provided in accordance with the third embodiment of the present application.

[0037] Figure 8 A rear view of a battery provided in accordance with the third embodiment of the present application.

[0038] Fig. 9 This is a schematic three-dimensional diagram of a battery provided in the third embodiment of the present application at a first viewing angle.

[0039] Fig.10 This is a schematic three-dimensional diagram of the battery provided in the first embodiment of the present application at a second viewing angle.

[0040] Fig.11 A schematic three-dimensional diagram of a battery provided in the second embodiment of the present application at a second viewing angle.

[0041] Fig.12 For along Figure 1 Cross-section along the midline AA.

[0042] Main component symbols

[0043] Battery 100

[0044] Connectors 101

[0045] Battery 10

[0046] Packaging bag 11

[0047] Packaging bag body 111

[0048] Top wall 1111

[0049] First side wall 1112

[0050] Second side wall 1113

[0051] Packaging unit 112

[0052] Top seal 1121

[0053] First corner seal 11211

[0054] Second corner seal 11212

[0055] First sub-segment 1121a

[0056] Second sub-segment 1121b

[0057] First side sealing portion 1122

[0058] Second side sealing portion 1123

[0059] Ear glue 1124

[0060] Tab 12

[0061] The first electrode tab 12a

[0062] The second electrode tab 12b

[0063] 121

[0064] The third bending section 122

[0065] Second paragraph 123

[0066] Protection plate assembly 20

[0067] First circuit board 21

[0068] First side 211

[0069] First sub-cloth area 2111

[0070] Second sub-cloth area 2112

[0071] Second side 212

[0072] The third side 213

[0073] Second circuit board 22

[0074] Part 1221

[0075] The first extension section 2211

[0076] The first bending section 2212

[0077] Part 222

[0078] Reinforcement 23

[0079] Electronic components 24

[0080] Adapter 25

[0081] First connecting section 251

[0082] The second bending section 252

[0083] The second connecting section 253

[0084] First direction X

[0085] Second direction Y

[0086] The third direction Z

[0087] Center plane L DETAILED DESCRIPTION

[0088] 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 of the embodiments.

[0089] 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 at the same time. 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 at the same time.

[0090] Unless otherwise specified, the term "plurality" as used herein means two or more than two.

[0091] The terms "first", "second", etc. are only used to distinguish different objects and shall not be understood as indicating or implying relative importance or implying the quantity, specific order or primary and secondary relationship of the indicated technical features.

[0092] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0093] It should be understood that, considering the actual processing tolerance factors, in the technical solution of the present application, when the 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 between the two elements greater than, equal to or less than.

[0094] An embodiment of the present application provides a battery, the battery comprising a battery cell and a protection plate assembly, the battery cell comprising an electrode assembly, a packaging bag and a pole ear. The electrode assembly is arranged in the packaging bag, one end of the pole ear is connected to the electrode assembly, and the other end of the pole ear extends out of the top of the packaging bag. The protection plate assembly is arranged at the top of the packaging bag, and the protection plate assembly comprises a first circuit board, a second circuit board and a reinforcement. The first circuit board comprises a first surface and a second surface arranged opposite to each other along a first arrangement direction, the pole ear is connected to the first surface, and the reinforcement is connected to the second surface. The second circuit board comprises a first part and a second part, one end of the first part is connected to the first circuit board, the other end of the first part is connected to one end of the second part, and the other end of the second part is connected to an external circuit. Along the first arrangement direction, the second part is arranged opposite to the second surface, and the reinforcement is arranged at a distance from the second circuit board. The first arrangement direction is the thickness direction of the first circuit board.

[0095] The reinforcing member supports the first circuit board, so that the first circuit board still has sufficient strength after being thinned, and thinning the first circuit board is conducive to thinning the protection plate assembly arranged on the top of the packaging bag, thereby facilitating thinning of the battery head. In addition, the reinforcing member and the second circuit board are arranged at intervals along the first arrangement direction, so that the reinforcing member and the second circuit board do not overlap in the first arrangement direction, thereby facilitating thinning of the battery.

[0096] Some embodiments of the present application will be described below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0097] Please refer to Figure 1 and Figure 2 , an embodiment of the present application provides a battery 100. The battery 100 includes a battery cell 10 and a protection board assembly 20. The protection board assembly 20 is electrically connected to the battery cell 10 and is configured to be electrically connected to an external circuit. The battery 100 may be, but is not limited to, a secondary battery 100, which refers to a battery 100 that can be used continuously by activating active materials by charging after the battery 100 is discharged.

[0098] The thickness direction of the battery cell 10 is defined as a first direction X, the width direction of the battery cell 10 is defined as a second direction Y, and the length direction of the battery cell 10 is defined as a third direction Z, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0099] See also Figure 1 The battery cell 10 includes an electrode assembly (not shown), a packaging bag 11 and a tab 12. The electrode assembly is disposed in the packaging bag 11, one end of the tab 12 is connected to the electrode assembly, and the other end of the tab 12 extends out of the top of the packaging bag 11.

[0100] The electrode assembly converts chemical energy into electrical energy. The electrode assembly includes a positive electrode sheet, a separator and a negative electrode sheet arranged in sequence. The positive electrode sheet, the separator and the negative electrode sheet are a winding structure or a stacked structure.

[0101] In some embodiments, please refer to Figure 1 and Figure 2 The packaging bag 11 includes a packaging bag body 111 and a sealing portion 112. The packaging bag body 111 includes a top wall 1111, a first side wall 1112 and a second side wall 1113. The sealing portion 112 includes a top seal portion 1121, a first side seal portion 1122 and a second side seal portion 1123. The top seal portion 1121 is connected to the top wall 1111, the first side seal portion 1122 is connected to the first side wall 1112 and is bent toward the first side wall 1112, the second side seal portion 1123 is connected to the second side wall 1113 and is bent toward the first side wall 1112, the top seal portion 1121 is connected to the first side seal portion 1122 and forms a first corner seal portion 11211, and the top seal portion 1121 is connected to the second side seal portion 1123 and forms a second corner seal portion 11212.

[0102] In some embodiments, the electrode tab 12 includes a first electrode tab 12 a and a second electrode tab 12 b , and the first electrode tab 12 a and the second electrode tab 12 b are spaced apart and arranged along the second direction Y at the top sealing portion 1121 .

[0103] In some embodiments, the tab 12 extends out of the top seal portion 1121 along the third direction Z, see Figure 1 , the top seal portion 1121 is provided with a pole ear glue 1124 at the position where the pole ear 12 extends out. The pole ear glue 1124 can improve the sealing performance of the top seal portion 1121 at the position where the pole ear 12 extends out, thereby helping to reduce the influence of factors such as water vapor on the electrode assembly. In other embodiments, the pole ear 12 extends out of the first side seal portion 1122 or the second side seal portion 1123 along the second direction Y, and the first side seal portion 1122 or the second side seal portion 1123 is provided with a pole ear glue 1124 at the position where the pole ear 12 extends out.

[0104] The protection plate assembly 20 is disposed on the top of the packaging bag 11. In some embodiments, the protection plate assembly 20 is disposed in a space surrounded by the top wall 1111, the top seal portion 1121, the first corner seal portion 11211 and the second corner seal portion 11212.

[0105] Please continue reading Figure 1 and Figure 2, the protection plate assembly 20 includes a first circuit board 21, a second circuit board 22 and a reinforcement 23. The first circuit board 21 includes a first surface 211 and a second surface 212, and the first surface 211 and the second surface 212 are arranged opposite to each other along the first arrangement direction. The pole ear 12 is connected to the first surface 211, and the reinforcement 23 is connected to the second surface 212. The reinforcement 23 is configured to support the first circuit board 21. The second circuit board 22 includes a first part 221 and a second part 222, one end of the first part 221 is connected to the first circuit board 21, the other end of the first part 221 is connected to one end of the second part 222, and the other end of the second part 222 is connected to an external circuit. Along the first arrangement direction, the second part 222 is arranged opposite to the second surface 212, and the reinforcement 23 is arranged at intervals from the second circuit board 22. The first arrangement direction is the thickness direction of the first circuit board 21. In some embodiments, the first arrangement direction is parallel to the first direction X.

[0106] The reinforcing member 23 supports the first circuit board 21, which can make the first circuit board 21, which is thin but insufficient in strength, have sufficient strength, and this structure is conducive to thinning the protection plate assembly 20 arranged on the top of the packaging bag 11, thereby facilitating the thinning of the head of the battery 100. In addition, the reinforcing member 23 and the second circuit board 22 are arranged at intervals along the first arrangement direction, so that the reinforcing member 23 and the second circuit board 22 do not overlap in the first arrangement direction, thereby facilitating the thinning of the battery 100.

[0107] See also Figure 3 or Figure 6 In some embodiments, along the first arrangement direction, the reinforcing member 23 overlaps the tab 12. The reinforcing member 23 can support the area on the first circuit board 21 connected to the tab 12, thereby facilitating the connection between the tab 12 and the first circuit board 21.

[0108] See also Figure 3 In some embodiments, along the first arrangement direction, the projection of the connection portion between the tab 12 and the first circuit board 21 is located within the projection range of the reinforcing member 23. The reinforcing member 23 can support the entire area on the first circuit board 21 connected to the tab 12, thereby making it easier to connect the tab 12 to the first circuit board 21.

[0109] See also Figure 1 , Figure 4 or Figure 7 , the first circuit board 21 is provided with an electronic component 24. The first circuit board 21 and the electronic component 24 cooperate to form a protection circuit to protect the battery cell 10. For example, the first circuit board 21 and the electronic component 24 cooperate to perform voltage monitoring, current detection, temperature monitoring, and insulation monitoring on the battery cell 10 to reduce the risk of the battery cell 10 being in an overcharge, over-discharge, overcurrent, short circuit state, and ultra-high temperature charge and discharge state. In some embodiments, the electronic component 24 is welded to the first circuit board 21.

[0110] Please refer to Figures 1 to 9 In some embodiments, the first surface 211 includes a fabric area, the fabric area is provided with electronic components 24, and along the first arrangement direction, the reinforcing member 23 overlaps with the fabric area. The reinforcing member 23 can support part of the fabric area, which is beneficial to increase the strength of the fabric area, thereby facilitating the electronic components 24 to be arranged on the first circuit board 21.

[0111] Please refer to Figures 1 to 9 In some embodiments, along the first arrangement direction, the projection of the fabric area is located within the projection range of the reinforcing member 23. The reinforcing member 23 can support the entire fabric area, which is beneficial to further increase the strength of the fabric area, thereby making it easier to arrange the electronic component 24 on the first circuit board 21.

[0112] See also Figure 1 , Figure 4 or Figure 7 In some embodiments, the fabric area includes a first sub-fabric area 2111. Along the first arrangement direction, the first sub-fabric area 2111 is located between the first pole lug 12a and the first corner seal 11211, and the reinforcing piece 23 overlaps with the first sub-fabric area 2111. Along the first arrangement direction, the first sub-fabric area 2111 is located between the first pole lug 12a and the first corner seal 11211. The reinforcing piece 23 is configured to reinforce the fabric area. Along the first arrangement direction, the fabric area is provided between the first pole lug 12a and the first corner seal 11211, so that the reinforcing piece 23 provided on the second surface 212 is correspondingly located between the first pole lug 12a and the first corner seal 11211, thereby making the second surface 212 have a larger width to accommodate the second part 222, thereby increasing the flexibility of the second part 222 to facilitate connection to an external circuit.

[0113] See also Figure 1 or Figure 4 In some embodiments, the fabric area further includes a second sub-fabric area 2112 .

[0114] Please refer to Figure 4 and Figure 5In some embodiments, along the first arrangement direction, the second sub-fabric area 2112 is located between the first pole lug 12a and the second pole lug 12b, the reinforcing member 23 overlaps with the second sub-fabric area 2112, the reinforcing member 23 overlaps with the first pole lug 12a, the reinforcing member 23 and the second pole lug 12b are arranged at intervals, and the second portion 222 overlaps with the second pole lug 12b. The reinforcing member 23 is arranged at intervals with the second pole lug 12b along the first arrangement direction, and the second portion 222 overlaps with the second pole lug 12b along the first arrangement direction, which is conducive to the second portion 222 of the second circuit board 22 extending toward the central plane L of the packaging bag body 111, thereby facilitating the second portion 222 to be connected to an external circuit.

[0115] The central plane L of the packaging bag body 111 is a symmetric plane of the packaging bag body 111 along the second direction Y, and the central plane L is perpendicular to the second direction Y.

[0116] See also Figure 1 or Figure 4 In some embodiments, along the second direction Y, the first electrode tab 12 a and the second electrode tab 12 b are located on different sides of the central plane L of the packaging bag body 111 .

[0117] See also Figure 6 In some embodiments, along the second direction Y, the first pole tab 12a and the second pole tab 12b are located on the same side of the center plane L of the packaging bag body 111. Along the first arrangement direction, the reinforcing member 23 is spaced apart from the first pole tab 12a and the second pole tab 12b. The first pole tab 12a and the second pole tab 12b provided on the first surface 211 are offset to the same side of the center plane L of the packaging bag body 111, and the electronic component 24 is located on the other side of the first surface 211. Along the first arrangement direction, the reinforcing member 23 overlaps with the electronic component 24, and the second portion 222 overlaps with the first pole tab 12a and the second pole tab 12b, reserving more extended positions for the second portion 222 of the second circuit board 22, so as to facilitate the connection of the second portion 222 with the external circuit.

[0118] In some embodiments, a first insulating member (not shown) is provided on the side of the top seal portion 1121 facing the first surface 211. This is beneficial for insulating the tab 12 from the electronic component 24 and reducing the risk of direct electrical connection between the tab 12 and the electronic component 24. In some embodiments, the first corner seal portion 11211 and the second corner seal portion 11212 are also provided with a first insulating member.

[0119] In some embodiments, the first circuit board 21 includes a wiring conductive layer (not shown), and the wiring conductive layer is provided with a trace electrically connected to the electronic component 24. The wiring conductive layer refers to a metal layer with current carrying capacity, such as a copper clad laminate layer. In other embodiments, the wiring conductive layer can be made of other metal materials.

[0120] In some embodiments, the number of layers of the wiring conductive layer of the second circuit board 22 is less than the number of layers of the wiring conductive layer of the first circuit board 21. For example, the number of layers of the wiring conductive layer of the second circuit board 22 is two, and the number of layers of the wiring conductive layer of the first circuit board 21 is four. The present application is not limited thereto, and in other embodiments, the number of layers of the wiring conductive layer of the second circuit board 22 is three, and the number of layers of the wiring conductive layer of the first circuit board 21 is five.

[0121] In some embodiments, the number of wiring conductive layers of the second circuit board 22 is equal to the number of wiring conductive layers of the first circuit board 21. For example, the number of wiring conductive layers of the first circuit board 21 and the second circuit board 22 are both four, but the present application is not limited thereto.

[0122] In some embodiments, the number of wiring conductive layers of the second circuit board 22 is less than the number of wiring conductive layers of the first circuit board 21, and the thickness of the second circuit board 22 is less than the thickness of the first circuit board 21, and the thickness of the reinforcing member 23 is less than the thickness of the first circuit board 21. The number of wiring conductive layers of the first circuit board 21 is greater, and the thickness of the first circuit board 21 is thicker, that is, the strength of the first circuit board 21 is higher, which is conducive to arranging more wirings electrically connected to the electronic components 24 on the first circuit board 21. At the same time, when the reinforcing member 23 is spaced from the first pole lug 12a and / or the second pole lug 12b along the first arrangement direction, that is, when the reinforcing member 23 does not reinforce the area of ​​the first circuit board 21 corresponding to the first pole lug 12a and / or the second pole lug 12b, the higher strength of the first circuit board 21 is conducive to the connection of the first pole lug 12a and / or the second pole lug 12b with the first circuit board 21.

[0123] In some embodiments, the first circuit board 21 further includes an insulating layer (not shown), which is disposed on the outer side of the wiring conductive layer to protect the wiring conductive layer and prevent oxidation.

[0124] In some embodiments, the difference in thickness between the second circuit board 22 and the reinforcing member 23 is less than 10%. For example, the thickness of the second circuit board 22 is n, and the thickness of the reinforcing member 23 is m. When n>m, (nm) / m is less than 10%; when m>n, (mn) / n is less than 10%. Along the first arrangement direction, the reinforcing member 23 and the second circuit board 22 are spaced apart. In this way, the space occupied by the reinforcing member 23 and the second circuit board 22 in the first arrangement direction is substantially equal, and the reinforcing member 23 and the second circuit board 22 are not stacked in the first arrangement direction, which is conducive to making the head of the battery 100 more compact, thereby facilitating improving the energy density of the battery 100.

[0125] In some embodiments, the thickness of the first circuit board 21 is 0.25 mm to 0.45 mm, and the thickness of the second circuit board 22 is 0.12 mm to 0.25 mm. For example, the thickness of the first circuit board 21 is 0.25 mm, 0.30 mm, 0.35 mm, 0.40 mm, and 0.45 mm, and the thickness of the second circuit board 22 is 0.12 mm, 0.15 mm, 0.17 mm, 0.20 mm, and 0.25 mm. In this way, the first circuit board 21 and the second circuit board 22 can be made thinner, which is conducive to further thinning the head of the battery 100, thereby facilitating further thinning of the battery 100.

[0126] In some embodiments, the first circuit board 21 is a printed circuit board. The printed circuit board has high strength and can conveniently place the electronic components 24 on the first circuit board 21 and connect the tabs 12 and the second circuit board 22 to the first circuit board 21. In other embodiments, the first circuit board 21 is a flexible circuit board.

[0127] In some embodiments, the second circuit board 22 is a flexible circuit board. The flexible circuit board has a low strength and can be easily bent to facilitate connection with an external circuit. In other embodiments, the second circuit board 22 is a printed circuit board.

[0128] When the first circuit board 21 is a printed circuit board and the second circuit board 22 is a flexible circuit board, the second circuit board 22 is welded to the first circuit board 21. When both the first circuit board 21 and the second circuit board 22 are flexible circuit boards, the first circuit board 21 and the second circuit board 22 are integrally arranged.

[0129] See also Figure 1 , Figure 4 or Figure 7 In some embodiments, the second circuit board 22 is a flexible circuit board, and the second part 222 is provided with a connector 101 electrically connected to an external circuit. In some embodiments, the connector 101 is a connector. The second circuit board 22 is a flexible circuit board, which is conducive to enhancing the mobility of the connector 101 relative to the battery cell 10, thereby facilitating the connector 101 to flexibly connect to the external circuit. In some embodiments, one end of the second part 222 away from the first part 221 protrudes from the top sealing part 1121 and is provided with a connector 101.

[0130] In some embodiments, see Fig.10The first portion 221 includes a first extension section 2211 and a first bending section 2212. The first bending section 2212 connects the first extension section 2211 and the second portion 222, and the first extension section 2211 and the second portion 222 are arranged opposite to each other along the first arrangement direction. The first surface 211 is provided with a connecting pad (not shown), and the first extension section 2211 is welded to the first surface 211 through the connecting pad. Along the first arrangement direction, the second portion 222 overlaps with the first extension section 2211, and the first extension section 2211 is spaced apart from the tab 12.

[0131] In some embodiments, see Fig.11 The first circuit board 21 also includes a third surface 213, the third surface 213 connects the first surface 211 and the second surface 212, and the first extension section 2211 connects the third surface 213. Along the first arrangement direction, the second portion 222 overlaps the first extension section 2211. Both the first circuit board 21 and the second circuit board 22 are flexible circuit boards, and the first circuit board 21 and the second circuit board 22 are integrally arranged. Since the first circuit board 21 and the second circuit board 22 are integrally arranged, there is no need to reserve an area on the first surface 211 for connecting the first circuit board 21 and the second circuit board 22, which is conducive to reducing the width of the battery cell 10.

[0132] See also Fig.12 In some embodiments, the top seal portion 1121 includes a first sub-segment 1121a and a second sub-segment 1121b. One end of the first sub-segment 1121a is connected to the top wall 1111, and the other end of the first sub-segment 1121a is connected to the second sub-segment 1121b. The thickness of the first sub-segment 1121a is less than the thickness of the second sub-segment 1121b, and the difference in thickness between the second sub-segment 1121b and the first sub-segment 1121a is 0.1 mm to 1 mm. The tab 12 extends out of the second sub-segment 1121b and bends toward the top wall 1111.

[0133] In some embodiments, the bent tab 12 is connected to the first surface 211 through an adapter 25. The adapter 25 includes a first connecting segment 251, a second bending segment 252, and a second connecting segment 253 connected in sequence, the first connecting segment 251 is connected to the tab 12, and the second connecting segment 253 is connected to the first surface 211. Along the first arrangement direction, the second sub-segment 1121b is spaced apart from the first connecting segment 251. The thickness of the first sub-segment 1121a is less than the thickness of the second sub-segment 1121b, that is, the second sub-segment 1121b is a thicker segment of the top seal portion 1121, and by spacing the second sub-segment 1121b from the first connecting segment 251 along the first arrangement direction, it is beneficial to make the first connecting segment 251 avoid the second sub-segment 1121b along the first arrangement direction, and reasonably utilize the thickness difference between the first sub-segment 1121a and the second sub-segment 1121b, so as to further reduce the thickness of the battery 100.

[0134] In some embodiments, the first connecting segment 251 and the second connecting segment 253 of the adapter 25 extend away from the top wall 1111 .

[0135] In some embodiments, a second insulating member (not shown) is provided between the adapter 25 and the top seal 1121, and the second insulating member is used to isolate the adapter 25 and the top seal 1121. The second insulating member is helpful to improve the problem of the adapter 25 contacting the top seal 1121 and causing a short circuit.

[0136] See also Fig.12 In some embodiments, the tab 12 includes a first section 121, a third bending section 122, and a second section 123 connected in sequence. The first section 121 of the tab 12 extends out of the second subsection 1121b of the top seal portion 1121, and the second section 123 of the tab 12 is connected to the second connecting section 253 of the adapter 25. Along the first arrangement direction, the first circuit board 21, the second connecting section 253, the second section 123, the first connecting section 251, and the top seal portion 1121 are arranged opposite to each other in sequence.

[0137] In some embodiments, the second section 123 of the tab 12 extends toward the top wall 1111 .

[0138] In some embodiments, the material of the adapter 25 is one or more conductive materials such as copper, aluminum, nickel, and nickel alloy.

[0139] In some embodiments, the reinforcing member 23 is a metal plate, such as a steel plate. In some embodiments, the reinforcing member 23 is a fiberboard.

[0140] The embodiment of the present application further provides an electric device, including an electric subject and any one of the batteries 100 in the above embodiments. The electric subject may be, but is not limited to, an electronic terminal such as a mobile phone, a tablet, a camera, or a drone.

[0141] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application, and are not intended to limit the present application. As long as they are within the essential scope of the present application, appropriate changes and modifications to the above embodiments are within the scope disclosed in the present application.

Claims

1. A battery, characterized in that: include: A battery cell, the battery cell comprising an electrode assembly, a packaging bag and a tab, the electrode assembly being arranged in the packaging bag, one end of the tab being connected to the electrode assembly, and the other end of the tab extending out of the top of the packaging bag; A protection plate assembly, the protection plate assembly is arranged on the top of the packaging bag, the protection plate assembly includes a first circuit board, a second circuit board and a reinforcing member, the first circuit board includes a first surface and a second surface arranged opposite to each other along a first arrangement direction, the tab is connected to the first surface, and the reinforcing member is connected to the second surface; The second circuit board includes a first portion and a second portion, one end of the first portion is connected to the first circuit board, the other end of the first portion is connected to one end of the second portion, and the other end of the second portion is configured to be electrically connected to an external circuit; Along the first arrangement direction, the second portion is arranged opposite to the second surface, and the reinforcing member is arranged at a distance from the second circuit board; the first arrangement direction is the thickness direction of the first circuit board.

2. The battery according to claim 1, characterized in that The second circuit board is a flexible circuit board, and the second portion is provided with a connector configured to be electrically connected to the external circuit.

3. The battery according to claim 1, characterized in that The first surface includes a fabric area, the fabric area is provided with electronic components, and along the first arrangement direction, the reinforcing piece overlaps with the fabric area.

4. The battery according to claim 3, characterized in that Along the first arrangement direction, the projection of the fabric area is located within the projection range of the reinforcing member.

5. The battery according to claim 1, characterized in that Along the first arrangement direction, the reinforcing member overlaps with the tab.

6. The battery according to claim 3, characterized in that The packaging bag comprises a packaging bag body and a sealing portion, the packaging bag body comprises a top wall, a first side wall and a second side wall, the sealing portion comprises a top seal portion, a first side seal portion and a second side seal portion, the top seal portion is connected to the top wall, the first side seal portion is connected to the first side wall and bent toward the first side wall, the second side seal portion is connected to the second side wall and bent toward the first side wall, the top seal portion is connected to the first side seal portion and forms a first corner seal portion, and the top seal portion is connected to the second side seal portion and forms a second corner seal portion; The electrode tab comprises a first electrode tab and a second electrode tab, wherein the first electrode tab and the second electrode tab are arranged at intervals on the top sealing portion along a second direction; The fabric area includes a first sub-fabric area. Along the first arrangement direction, the first sub-fabric area is located between the first pole tab and the first corner seal portion. The reinforcing piece overlaps with the first sub-fabric area.

7. The battery according to claim 6, characterized in that Along the second direction, the first pole tab and the second pole tab are located on the same side of the central plane of the packaging bag body; along the first arrangement direction, the reinforcing member is spaced apart from the first pole tab and the second pole tab; The center plane is a symmetric plane of the packaging bag body along the second direction, and the center plane is perpendicular to the second direction.

8. The battery according to claim 6, characterized in that The fabric area also includes a second sub-fabric area. Along the first arrangement direction, the second sub-fabric area is located between the first pole lug and the second pole lug. The reinforcement overlaps with the second sub-fabric area. The reinforcement is spaced apart from the second pole lug, and the second portion overlaps with the second pole lug.

9. The battery according to claim 1, characterized in that The first portion includes a first extension section and a first bending section, the first bending section connects the first extension section and the second portion, the first extension section and the second portion are arranged opposite to each other along the first arrangement direction, the first surface is provided with a connecting pad, and the first extension section is welded to the first surface through the connecting pad; Along the first arrangement direction, the second portion overlaps with the first extension section, and the first extension section is spaced apart from the tab.

10. The battery according to claim 1, characterized in that The first portion includes a first extension section and a first bending section, the first bending section connects the first extension section and the second portion, the first extension section and the second portion are arranged opposite to each other along the first arrangement direction, the first circuit board also includes a third surface, the third surface connects the first surface and the second surface, and the first extension section connects the third surface; Along the first arrangement direction, the second portion overlaps with the first extension section; The first circuit board and the second circuit board are both flexible circuit boards, and the first circuit board and the second circuit board are integrally arranged.

11. The battery according to claim 1, characterized in that The number of wiring conductive layers of the second circuit board is smaller than that of the first circuit board, the thickness of the second circuit board is smaller than that of the first circuit board, and the thickness of the reinforcement is smaller than that of the first circuit board.

12. The battery according to claim 1, characterized in that The packaging bag comprises a packaging bag body and a packaging part, wherein the packaging bag body comprises a top wall, and the packaging part comprises a top sealing part, wherein the top sealing part is connected to the top wall; The top seal portion includes a first sub-segment and a second sub-segment, one end of the first sub-segment is connected to the top wall, the other end of the first sub-segment is connected to the second sub-segment, the thickness of the first sub-segment is less than the thickness of the second sub-segment, and the difference in thickness between the second sub-segment and the first sub-segment is 0.1 mm to 1 mm, and the tab extends out of the second sub-segment and is bent toward the top wall; The bent pole lug is connected to the first surface through an adapter, the adapter comprises a first connecting section, a second bending section and a second connecting section connected in sequence, the first connecting section is connected to the pole lug, and the second connecting section is connected to the first surface; Along the first arrangement direction, the second sub-segment is spaced apart from the first connecting segment.

13. The battery according to any one of claims 1 to 12, characterized in that: The thickness of the first circuit board is 0.25 mm to 0.45 mm, and the thickness of the second circuit board is 0.12 mm to 0.25 mm.

14. An electrical equipment, comprising an electrical main body, characterized in that: The electrical device further comprises a battery as claimed in any one of claims 1 to 13.

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