Battery and terminal equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery and terminal equipment. The battery comprises a battery cell, a connecting piece and a circuit board. The circuit board is arranged at the top of the battery cell, the battery cell is provided with a tab, the connecting piece comprises a first welding part, a bending part and a second welding part which are connected in sequence, the first welding part is bent relative to the second welding part through the bending part, so that the extension direction of the first welding part is intersected with the extension direction of the second welding part, and the first welding part is welded with the tab; and the second welding part is welded with one side of the circuit board in the thickness direction, and is clamped between the circuit board and the battery cell. According to the battery provided by the utility model, the size of the battery in the height direction can be reduced as much as possible, so that the ultimate miniaturization of the battery is realized, and the application range of the battery is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery and a terminal device. Background Art

[0002] Soft-pack batteries, also known as polymer lithium batteries, are a type of battery with high energy, miniaturization, and light weight. At present, the circuit board in soft-pack batteries is generally installed on the top of the battery cell, and the battery cell is connected to the circuit board through the connection structure of the tab and the connecting piece to achieve various battery functions. However, the current soft-pack batteries are large in height, which is not conducive to achieving the ultimate miniaturization of the battery, resulting in a smaller application range of the battery. Utility Model Content

[0003] The purpose of the utility model is to provide a battery and a terminal device, which can reduce the size of the battery in the height direction as much as possible, thereby achieving the ultimate miniaturization of the battery and expanding the application range of the battery.

[0004] The utility model provides a battery, comprising a battery cell, a connecting piece and a circuit board, wherein the circuit board is arranged on the top of the battery cell, the battery cell is provided with a pole ear, the connecting piece comprises a first welding portion, a bending portion and a second welding portion which are connected in sequence, the first welding portion is folded relative to the second welding portion through the bending portion so that the extension direction of the first welding portion intersects with the extension direction of the second welding portion, the first welding portion is welded to the pole ear and connected to the side surface in the width direction of the circuit board, and the second welding portion is welded to one side in the thickness direction of the circuit board and is clamped between the circuit board and the battery cell.

[0005] Furthermore, the first welding portion includes a first welding section, a connecting section and a second welding section connected in sequence, the first welding section and the second welding section are folded through the connecting section, the pole ear is arranged between the first welding section and the second welding section, and is welded to the first welding section and the second welding section at the same time, and the second welding section is connected to the bending portion.

[0006] Furthermore, the tab includes a first extension section, a connecting section and a second extension section connected in sequence, the first extension section is parallel to the second extension section, the first extension section is welded to the first welding section, the connecting section is fitted to the connecting section, and the second extension section is welded to the second welding section.

[0007] Furthermore, the first extension section and the first welding section are welded to form a plurality of first welding points, and the plurality of first welding points are arranged side by side; the second extension section and the second welding section are welded to form a plurality of second welding points, and the plurality of second welding points are arranged side by side.

[0008] Further, the position of each first welding point is aligned with the position of a second welding point.

[0009] Furthermore, the battery also includes components, the first welding portion protrudes from the top surface of the circuit board, the components are mounted on the circuit board, and the height of the components protruding from the top surface of the circuit board is greater than or equal to the height of the first welding portion protruding from the top surface of the circuit board.

[0010] Furthermore, a top sealing edge is provided on the top surface of the battery cell, and side sealing edges are protrudingly provided on both ends of the top surface of the battery cell in the length direction, and the top sealing edge is bent toward the top surface of the battery cell to form a packaging foot with the side sealing edge; the number of battery cells is at least two, at least two battery cells are arranged side by side, and the packaging feet of two adjacent battery cells close to each other form a packaging part, part of the circuit board avoids the packaging part, and the circuit board is connected to at least two adjacent battery cells.

[0011] Furthermore, the circuit board is provided with an avoidance gap for avoiding the packaging part, and the avoidance gap is formed inwardly from one side surface of the circuit board in the width direction toward the other side surface.

[0012] Furthermore, the ratio of the inner concave depth of the avoidance notch to the width of the battery cell ranges from 1 / 5 to 4 / 5.

[0013] Furthermore, the circuit board includes a fixing plate and a bridging plate, the number of the fixing plates is the same as the number of the battery cells, the bridging plate is connected between two fixing plates, each fixing plate is connected to a battery cell, and the bridging plate spans over the packaging portion.

[0014] Furthermore, the bridging plate includes mutually connected positioning parts and bridging parts, the number of the positioning parts is the same as the number of the fixing plates, each positioning part is welded to a fixing plate, the bridging part is connected between the two positioning parts, and the bridging part spans over the packaging part.

[0015] Furthermore, the bridging portion includes a first side wall, a connecting wall and a second side wall connected in sequence, the first side wall and the second side wall are relatively arranged at two ends of the connecting wall, the first side wall, the connecting wall, the second side wall and the top of the battery cell together form a clearance space, and the clearance space is used to accommodate the packaging portion.

[0016] Furthermore, the battery also includes a protective body, which is plastic-sealed on the top of the battery cell.

[0017] The utility model also provides a terminal device, including the above-mentioned battery, the battery including a battery cell, a connecting piece and a circuit board, the circuit board is arranged on the top of the battery cell, the battery cell is provided with a pole ear, the connecting piece includes a first welding portion, a bending portion and a second welding portion connected in sequence, the first welding portion is folded relative to the second welding portion through the bending portion so that the extension direction of the first welding portion intersects with the extension direction of the second welding portion, the first welding portion is welded to the pole ear and connected to the side in the width direction of the circuit board, the second welding portion is welded to one side in the thickness direction of the circuit board, and is clamped between the circuit board and the battery cell.

[0018] The battery and terminal device provided by the utility model have the following beneficial effects:

[0019] The battery provided by the utility model has a circuit board arranged on the top of the battery cell, the battery cell is provided with a pole ear, and the connecting piece includes a first welding portion, a bending portion, and a second welding portion connected in sequence, the first welding portion is folded relative to the second welding portion through the bending portion so that the extension direction of the first welding portion intersects with the extension direction of the second welding portion, the first welding portion is welded to the pole ear and connected to the side in the width direction of the circuit board, and the second welding portion is welded to one side in the thickness direction of the circuit board and is sandwiched between the circuit board and the battery cell. Compared with the prior art, the battery provided by the utility model can minimize the size of the battery in the height direction due to the use of a first welding portion connected to the side in the width direction of the circuit board and a second welding portion welded to one side in the thickness direction of the circuit board, thereby achieving extreme miniaturization of the battery and expanding the application range of the battery.

[0020] The terminal device provided by the utility model includes a battery, which can reduce the size of the battery in the height direction as much as possible, thereby achieving the ultimate miniaturization of the battery and expanding the application range of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the connection structure of the electrode ear and the connecting piece in the prior art;

[0023] Figure 2 A schematic structural diagram of a battery provided in the first embodiment of the utility model from one viewing angle;

[0024] Figure 3 A schematic diagram of the structure of the connection between the connecting piece and the tab of the battery cell provided in the first embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the structure of a battery after the connecting piece is unfolded provided in the first embodiment of the utility model;

[0026] Figure 5 A schematic structural diagram of a battery from another perspective provided in the first embodiment of the utility model;

[0027] Figure 6 An exploded view of a battery provided in accordance with a first embodiment of the present utility model;

[0028] Figure 7 A schematic diagram of the structure of a battery provided in the second embodiment of the utility model;

[0029] Figure 8 This is a schematic structural diagram of a circuit board in a battery provided in the second embodiment of the utility model.

[0030] Reference numerals:

[0031] 100-battery; 110-battery cell; 111-ear; 1111-first extension section; 1112-connecting section; 1113-second extension section; 112-top edge seal; 113-side edge seal; 114-packaging foot; 115-packaging part; 120-connecting piece; 121-first welding part; 1211-first welding section; 1212-connecting section; 1213-second welding section; 122-bending part; 123-second welding part; 130-circuit board; 131-avoidance gap; 133-fixing plate; 134-bridging plate; 1341-positioning part; 1342-bridging part; 1343-first side wall; 1344-connecting wall; 1345-second side wall; 1346-making way; 140-components; 150-second welding point; 160-first welding point; 170-protective body. DETAILED DESCRIPTION

[0032] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0033] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0034] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0035] In the description of the present invention, 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 invention 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 invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 the present invention can be understood according to specific circumstances.

[0037] Please refer to Figure 1 The inventors have found that in the prior art, the connection structure of the tabs and the connecting pieces are all sandwiched between the battery cell and the circuit board, which makes the thickness of the connection structure between the battery cell and the circuit board thicker, thereby making the size of the soft-pack battery larger in the height direction, which is not conducive to achieving the ultimate miniaturization of the soft-pack battery. In response to this, the inventors transferred the tabs and part of the connecting piece to the side of the circuit board to reduce the thickness of its connection structure between the battery cell and the circuit board, thereby reducing the size of the soft-pack battery in the height direction, thereby achieving the ultimate miniaturization of the soft-pack battery and expanding the application range of the soft-pack battery.

[0038] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0039] First embodiment

[0040] Please refer to Figures 2 to 6 The embodiment of the utility model provides a battery 100, which can minimize the size of the battery 100 (not shown) in the height direction, thereby achieving the ultimate miniaturization of the battery 100 and expanding the application range of the battery 100.

[0041] The battery 100 includes a battery cell 110, a connecting piece 120 and a circuit board 130. The circuit board 130 is disposed on the top of the battery cell 110 and connected to the battery cell 110 to realize various control and detection functions of the battery cell 110. The battery cell 110 is used to realize the charging and discharging functions. Specifically, the battery cell 110 is connected to the circuit board 130 through the connecting piece 120. The connecting piece 120 can promote the reaction of the battery 100, increase the capacity of the battery 100, and assist in the charging of the battery 100. By optimizing the structure and chemical composition of the connecting piece 120, the performance and life of the battery 100 can be further improved, and the development of the battery 100 technology can be promoted.

[0042] In this embodiment, the connecting sheet 120 is a nickel sheet, but is not limited thereto. In other embodiments, the connecting sheet 120 may also be made of other materials, and the material of the connecting sheet 120 is not specifically limited.

[0043] Furthermore, the battery cell 110 is provided with a pole ear 111, and the pole ear 111 of the battery cell 110 is connected to the circuit board 130 through the connecting piece 120 to achieve conduction between the battery cell 110 and the circuit board 130. In this embodiment, the number of the pole ear 111 and the connecting piece 120 is two, and the two pole ears 111 are respectively a positive pole ear 111 and a negative pole ear 111, and the two pole ears 111 are both provided on one battery cell 110, and each pole ear 111 is connected to the circuit board 130 through one connecting piece 120.

[0044] The connecting piece 120 includes a first welding portion 121, a bending portion 122 and a second welding portion 123. The first welding portion 121, the bending portion 122 and the second welding portion 123 are connected in sequence, wherein the first welding portion 121 is folded relative to the second welding portion 123 by the bending portion 122 so that the extension direction of the first welding portion 121 intersects with the extension direction of the second welding portion 123, the first welding portion 121 is welded to the tab 111 and connected to the side in the width direction of the circuit board 130, and the second welding portion 123 is welded to one side in the thickness direction of the circuit board 130 (the thickness direction of the circuit board 130 is the height direction of the battery cell 110), and is sandwiched between the circuit board 130 and the battery cell 110. In this way, the connecting piece 120 is divided into two parts, one part is arranged on the side of the circuit board 130, and the other part is arranged between the circuit board 130 and the battery cell 110. Compared with the solution in the prior art that the connection structure of the pole ear 111 and the connecting piece 120 is completely clamped between the battery cell 110 and the circuit board 130, the embodiment of the utility model reduces the volume of the connecting piece 120 between the circuit board 130 and the battery cell 110, thereby reducing the size of the battery 100 in the height direction, realizing the extreme miniaturization of the battery 100, and expanding the application range of the battery 100.

[0045] In this embodiment, the circuit board 130 is in a rectangular plate shape, that is, the side surface and the bottom surface of the circuit board 130 are perpendicular to each other. Accordingly, the first welding portion 121 is perpendicular to the second welding portion 123, the first welding portion 121 is arranged in contact with the side surface of the circuit board 130, the second welding portion 123 is sandwiched between the bottom surface of the circuit board 130 and the top surface of the battery cell 110, and the bending portion 122 realizes a smooth transition between the first welding portion 121 and the second welding portion 123.

[0046] The first welding portion 121 includes a first welding section 1211, a connecting section 1212, and a second welding section 1213. The first welding section 1211, the connecting section 1212, and the second welding section 1213 are connected in sequence, wherein the first welding section 1211 and the second welding section 1213 are folded through the connecting section 1212, and the first welding section 1211, the connecting section 1212, and the second welding section 1213 together form a U shape, the first welding section 1211 and the second welding section 1213 are parallel and spaced, the first welding section 1211 and the second welding section 1213 are both perpendicular to the second welding portion 123, and the connecting section 1212 is used to achieve a smooth transition between the first welding section 1211 and the second welding section 1213. Specifically, the tab 111 is disposed between the first welding section 1211 and the second welding section 1213, and is welded to the first welding section 1211 and the second welding section 1213 at the same time to ensure the reliability of welding between the tab 111 and the connecting sheet 120. The second welding section 1213 is connected to the bent portion 122 to achieve conduction between the first welding portion 121 and the second welding portion 123 , thereby achieving conduction between the electrode tab 111 and the second welding portion 123 .

[0047] Correspondingly, the tab 111 includes a first extension section 1111, a coupling section 1112, and a second extension section 1113. The first extension section 1111, the coupling section 1112, and the second extension section 1113 are connected in sequence, wherein the first extension section 1111 and the second extension section 1113 are parallel and spaced apart, the first extension section 1111 and the second extension section 1113 are both perpendicular to the second welding portion 123, and the coupling section 1112 is used to achieve a smooth transition between the first extension section 1111 and the second extension section 1113. Specifically, the first extension section 1111 is fitted with the first welding section 1211 and welded to the first welding section 1211 to achieve reliable connection and conduction between the first extension section 1111 and the first welding section 1211; the connecting section 1112 is fitted with the connecting section 1212 to achieve conduction between the connecting section 1112 and the connecting section 1212; the second extension section 1113 is fitted with the second welding section 1213 and welded to the second welding section 1213 to achieve reliable connection and conduction between the second extension section 1113 and the second welding section 1213.

[0048] In this embodiment, the first extension section 1111 and the first welding section 1211 are welded to form a plurality of first welding points 160, and the plurality of first welding points 160 are arranged side by side to enhance the welding effect between the first extension section 1111 and the first welding section 1211 and improve the aesthetics. The second extension section 1113 and the second welding section 1213 are welded to form a plurality of second welding points 150, and the plurality of second welding points 150 are arranged side by side to enhance the welding effect between the second extension section 1113 and the second welding section 1213 and improve the aesthetics. The two rows of welding points work together to enhance the welding effect between the tab 111 and the first welding portion 121, and improve the connection strength and the conduction effect.

[0049] During the connection process between the first welding portion 121 and the pole lug 111, the first welding portion 121 and the pole lug 111 are first overlapped and placed; then the first welding portion 121 and the pole lug 111 are spot welded to form two rows of welding points; then the first welding portion 121 and the pole lug 111 are folded at the same time, so that the first welding portion 121 forms a first welding section 1211, a connecting section 1212 and a second welding section 1213 connected in sequence, and the pole lug 111 forms a first extension section 1111, a connecting section 1112 and a second extension section 1113 connected in sequence, at this time, the first extension section 1111 and the first welding section 1211 have a plurality of first welding points 160 arranged side by side, and the second extension section 1113 and the second welding section 1213 have a plurality of second welding points 150 arranged side by side.

[0050] Preferably, the position of each first welding point 160 is aligned with the position of a second welding point 150, that is, the positions of the multiple first welding points 160 arranged side by side and the multiple second welding points 150 arranged side by side correspond to each other one by one, while ensuring two rows of welding points, the folding thickness of the first welding part 121 and the tab 111 is compressed as much as possible, thereby reducing the occupied space of the battery 100 and realizing the ultimate miniaturization of the battery 100.

[0051] Furthermore, the diameters of the first welding spot 160 and the second welding spot 150 are equal, and the diameters are both in the range of 0.3 mm to 0.5 mm. The reasonable diameters of the first welding spot 160 and the second welding spot 150 can facilitate welding while ensuring welding strength and improving the conduction performance. In this embodiment, the diameters of the first welding spot 160 and the second welding spot 150 are both 0.4 mm, but are not limited thereto. In other embodiments, the diameters of the first welding spot 160 and the second welding spot 150 can both be 0.3 mm or 0.5 mm. The diameters of the first welding spot 160 and the second welding spot 150 are not specifically limited.

[0052] It should be noted that the first welding portion 121 is protruded from the top surface of the circuit board 130 so that there is enough space to accommodate the welding structure of the first welding portion 121 and the tab 111 .

[0053] In some embodiments, the battery 100 further includes a component 140. The component 140 is mounted on the circuit board 130, and the height of the component 140 protruding from the top surface of the circuit board 130 is greater than or equal to the height of the first welding portion 121 protruding from the top surface of the circuit board 130, that is, the highest point of the first welding portion 121 will not be higher than the highest point of the component 140, and will not affect the size of the entire battery 100 in the height direction, thereby achieving the ultimate miniaturization of the battery 100. Specifically, the height range of the first welding portion 121 protruding from the top surface of the circuit board 130 is 0.3 mm to 0.7 mm, and a reasonable protruding height range can ensure that the height size of the battery 100 is not affected.

[0054] In some embodiments, the battery 100 also includes a protective body 170, which is plastic-sealed on the top of the battery cell 110 to reliably protect the connection structure of the battery cell 110, the connecting piece 120, the circuit board 130 and the components 140 to prevent them from being damaged by external collisions, thereby ensuring high safety.

[0055] Preferably, the projections of the connecting piece 120 and the circuit board 130 on the plane where the cross section of the battery cell 110 is located are both located within the cross-sectional area of ​​the battery cell 110, and the length and width directions of the battery cell 110 are both located on the cross section of the battery cell 110, that is, the connecting piece 120 and the circuit board 130 will not exceed the battery cell 110 in the length direction of the battery cell 110, nor will they exceed the battery cell 110 in the width direction of the battery cell 110, so as to avoid affecting the dimensions of the entire battery 100 in the length and width directions, thereby achieving extreme miniaturization of the battery 100.

[0056] Furthermore, the thickness of the connecting sheet 120 ranges from 0.08 mm to 0.12 mm. A reasonable thickness of the connecting sheet 120 can minimize the size of the battery 100 in the height direction while ensuring the conduction performance. In this embodiment, the thickness of the connecting sheet 120 is 0.1 mm, that is, the thickness of the first welding portion 121, the bending portion 122, and the second welding portion 123 are all 0.1 mm, but it is not limited thereto. In other embodiments, the thickness of the connecting sheet 120 can be 0.08 mm or 0.12 mm, and the thickness of the connecting sheet 120 is not specifically limited.

[0057] It is worth noting that a top sealing edge 112 is provided on the top surface of the battery cell 110, and side sealing edges 113 are protruding from the top surface of the battery cell 110 at both ends in the length direction thereof. The top sealing edge 112 is bent toward the top surface of the battery cell 110 to form a packaging foot 114 with the side sealing edge 113, that is, two packaging feet 114 are provided on the top of the battery cell 110, and the two packaging feet 114 are arranged opposite to each other in the length direction of the battery cell 110. Specifically, the number of battery cells 110 is at least two, and at least two battery cells 110 are arranged side by side along their length direction, so as to realize the neat arrangement and connection of multiple battery cells 110. The packaging feet 114 of two adjacent battery cells 110 that are close to each other form a packaging portion 115, and part of the circuit board 130 avoids the packaging portion 115, and the circuit board 130 is connected to at least two adjacent battery cells 110 to realize the conduction function of at least two battery cells 110.

[0058] In this embodiment, there are two battery cells 110, and the packaging pins 114 close to each other in the two battery cells 110 form a packaging portion 115. The circuit board 130 avoids the packaging portion 115 and is connected to the two battery cells 110. The two battery cells 110 are arranged side by side and closely together along their length direction to minimize the occupied space and achieve the ultimate miniaturization of the battery 100. However, this is not limited to this. In other embodiments, the number of battery cells 110 can be three or four, and the number of battery cells 110 is not specifically limited.

[0059] Furthermore, the circuit board 130 is a hard board, and the circuit board 130 is provided with an avoidance gap 131 for avoiding the packaging portion 115. The avoidance gap 131 is formed inwardly from one side of the circuit board 130 in the width direction toward the other side. The packaging portion 115 is arranged in the avoidance gap 131 to fully utilize the space while ensuring the stability of the connection between the circuit board 130 and the battery cell 110, thereby realizing the ultimate miniaturization of the battery 100.

[0060] Furthermore, the ratio of the inner concave depth of the avoidance notch 131 to the width of the battery cell 110 ranges from 1 / 5 to 4 / 5. A reasonable ratio of the inner concave depth of the avoidance notch 131 to the width of the battery cell 110 can achieve reliable connection of at least two battery cells 110 while ensuring the strength of the circuit board 130, thereby improving the stability of the battery 100. In this embodiment, the ratio of the inner concave depth of the avoidance notch 131 to the width of the battery cell 110 is 1 / 2, but is not limited thereto. In other embodiments, the ratio of the inner concave depth of the avoidance notch 131 to the width of the battery cell 110 can be 1 / 5 or 4 / 5, and the ratio of the inner concave depth of the avoidance notch 131 to the width of the battery cell 110 is not specifically limited.

[0061] The battery 100 provided by the embodiment of the utility model has a circuit board 130 arranged on the top of the battery cell 110, and the battery cell 110 is provided with a pole ear 111. The connecting piece 120 includes a first welding portion 121, a bending portion 122 and a second welding portion 123 which are connected in sequence. The first welding portion 121 is folded relative to the second welding portion 123 through the bending portion 122 so that the extension direction of the first welding portion 121 intersects with the extension direction of the second welding portion 123. The first welding portion 121 is welded to the pole ear 111 and is connected to the side of the circuit board 130 in the width direction. The second welding portion 123 is welded to one side of the circuit board 130 in the thickness direction and is clamped between the circuit board 130 and the battery cell 110. Compared with the prior art, the battery 100 provided by the utility model adopts a first welding portion 121 connected to the side of the circuit board 130 in the width direction and a second welding portion 123 welded to one side in the thickness direction of the circuit board 130. Therefore, the size of the battery 100 in the height direction can be minimized, thereby achieving extreme miniaturization of the battery 100 and expanding the application range of the battery 100.

[0062] The utility model further provides a terminal device, comprising a device body (not shown) and a battery 100 according to any one of the above embodiments.

[0063] In this embodiment, the terminal device includes a battery 100 and a device body. The battery 100 is used to supply power to the device body. The terminal device has all the beneficial effects of the battery 100, which will not be described in detail here.

[0064] Second embodiment

[0065] Please refer to Figure 7 and Figure 8 The embodiment of the utility model provides a battery 100. Compared with the first embodiment, the difference of this embodiment is that the structure of the circuit board 130 is different.

[0066] The circuit board 130 includes a fixing plate 133 and a bridge plate 134. The number of the fixing plates 133 is the same as the number of the battery cells 110. The bridge plate 134 is connected between two fixing plates 133. Each fixing plate 133 is connected to one battery cell 110 (the fixing plate 133 is connected to the tab 111 through the connecting sheet 120). The bridge plate 134 crosses over the packaging portion 115 to achieve conduction between at least two fixing plates 133, thereby achieving conduction between at least two battery cells 110.

[0067] In this embodiment, the fixing plate 133 is a whole plate, but is not limited thereto. In other embodiments, the fixing plate 133 may also be divided into a plurality of plate sections arranged at intervals, and the arrangement form of the fixing plate 133 is not specifically limited.

[0068] Furthermore, the fixing plate 133 is a hard plate to ensure the stability of its connection with the battery cell 110; the bridging plate 134 is a soft plate to facilitate folding and forming, so as to facilitate crossing over the second side edge seal 113 of one battery cell 110 and the first side edge seal 112 of an adjacent battery cell 110 at the same time; the bridging plate 134 is arranged between the fixing plate 133 and the battery cell 110, and the fixing plate 133 and the bridging plate 134 are welded to ensure the connection strength.

[0069] The bridging plate 134 includes mutually connected positioning portions 1341 and bridging portions 1342. The number of the positioning portions 1341 is the same as the number of the fixing plates 133, each positioning portion 1341 is welded to one fixing plate 133, the bridging portion 1342 is connected between two positioning portions 1341, the bridging portion 1342 spans over the packaging portion 115, and the bridging portion 1342 is used to achieve conduction between two adjacent positioning portions 1341, thereby achieving conduction between two adjacent battery cells 110.

[0070] Furthermore, the bridge portion 1342 is arranged in a U-shape, and the bridge portion 1342 includes a first side wall 1343, a connecting wall 1344, and a second side wall 1345 connected in sequence. The first side wall 1343 and the second side wall 1345 are arranged opposite to each other at two ends of the connecting wall 1344, and the first side wall 1343, the connecting wall 1344, and the second side wall 1345 together enclose a clearance space 1346, and the clearance space 1346 is used to accommodate the packaging portion 115. Specifically, the first side wall 1343, the connecting wall 1344, and the second side wall 1345 are spaced apart from the packaging portion 115 to avoid interference between the bridge portion 1342 and the packaging portion 115, thereby ensuring the stability of the battery 100.

[0071] The beneficial effects of the battery 100 provided by the embodiment of the utility model are the same as those of the first embodiment, and will not be described in detail here.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery, characterized in that: It includes a battery cell, a connecting piece and a circuit board, the circuit board is arranged on the top of the battery cell, the battery cell is provided with a pole ear, the connecting piece includes a first welding portion, a bending portion and a second welding portion which are connected in sequence, the first welding portion is folded relative to the second welding portion through the bending portion so that the extension direction of the first welding portion intersects with the extension direction of the second welding portion, the first welding portion is welded to the pole ear and connected to the side surface in the width direction of the circuit board, the second welding portion is welded to one side in the thickness direction of the circuit board and is clamped between the circuit board and the battery cell.

2. The battery according to claim 1, characterized in that The first welding portion includes a first welding section, a connecting section and a second welding section which are connected in sequence. The first welding section and the second welding section are folded through the connecting section. The pole ear is arranged between the first welding section and the second welding section and is welded to the first welding section and the second welding section at the same time. The second welding section is connected to the bending portion.

3. The battery according to claim 2, characterized in that The pole ear includes a first extension section, a connecting section and a second extension section connected in sequence, the first extension section is parallel to the second extension section, the first extension section is welded to the first welding section, the connecting section is fitted with the connecting section, and the second extension section is welded to the second welding section.

4. The battery according to claim 3, characterized in that The first extension section and the first welding section are welded to form a plurality of first welding points, and the plurality of first welding points are arranged side by side; the second extension section and the second welding section are welded to form a plurality of second welding points, and the plurality of second welding points are arranged side by side.

5. The battery according to claim 4, characterized in that The position of each of the first welding points is aligned with the position of one of the second welding points.

6. The battery according to claim 1, characterized in that The battery also includes components, the first welding portion protrudes from the top surface of the circuit board, the components are mounted on the circuit board, and the height of the components protruding from the top surface of the circuit board is greater than or equal to the height of the first welding portion protruding from the top surface of the circuit board.

7. The battery according to any one of claims 1 to 6, characterized in that: A top sealing edge is provided on the top surface of the battery cell, and side sealing edges are protrudingly provided at both ends of the top surface of the battery cell in the length direction, and the top sealing edge is bent toward the top surface of the battery cell to form a packaging foot with the side sealing edge; the number of the battery cells is at least two, at least two of the battery cells are arranged side by side, the packaging feet of two adjacent battery cells close to each other form a packaging part, part of the circuit board avoids the packaging part, and the circuit board is connected to at least two adjacent battery cells.

8. The battery according to claim 7, characterized in that The circuit board is provided with an avoidance notch for avoiding the packaging portion, and the avoidance notch is formed concavely from one side surface of the circuit board in the width direction toward the other side surface.

9. The battery according to claim 8, characterized in that The ratio of the inner concave depth of the avoidance notch to the width of the battery cell ranges from 1 / 5 to 4 / 5.

10. The battery according to claim 7, characterized in that The circuit board includes a fixing plate and a bridging plate, the number of the fixing plates is the same as the number of the battery cells, the bridging plate is connected between two of the fixing plates, each of the fixing plates is connected to one of the battery cells, and the bridging plate spans over the packaging portion.

11. The battery according to claim 10, characterized in that The bridging plate includes a positioning portion and a bridging portion that are interconnected. The number of the positioning portions is the same as the number of the fixing plates. Each of the positioning portions is welded to a fixing plate. The bridging portion is connected between two of the positioning portions, and the bridging portion spans over the packaging portion.

12. The battery according to claim 11, characterized in that The bridging portion includes a first side wall, a connecting wall, and a second side wall connected in sequence, the first side wall and the second side wall are relatively arranged at two ends of the connecting wall, the first side wall, the connecting wall, the second side wall and the top of the battery cell together form a clearance space, and the clearance space is used to accommodate the packaging portion.

13. The battery according to any one of claims 1 to 6, characterized in that: The battery further comprises a protective body, which is plastic-sealed on the top of the battery cell.

14. A terminal device, characterized in that: Comprising a battery as claimed in any one of claims 1 to 13.

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