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, and a tab is arranged at the end part of the battery cell; the protection plate is arranged at the end part of the battery cell, the thickness direction of the protection plate is the same as the length direction of the battery cell, the protection plate is provided with a device surface on which a first device is arranged, and the distance between the first device and the device surface is a first height; the connecting piece comprises a connecting section and a bending section which are connected in sequence, the connecting section is connected with one side of the protection plate, at least part of the bending section is located on the outer side of the device face, the distance between the part, located on the outer side of the device face, of the bending section and the device face is a second height, and the second height is smaller than or equal to the first height; the projection of the part, located on the outer side of the device surface, of the bent section on the device surface does not coincide with the projection of the first device on the device surface, and the tab is at least partially connected with the bent section. The battery can adopt a relatively large battery cell, so that a relatively large battery capacity can be realized.

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] Batteries have the advantages of light weight, simple process, flexible and convenient appearance design, and low cost. Therefore, batteries are widely used. After the battery is assembled, it needs to be encapsulated by injection molding. Figure 1 As shown, the battery generally includes a battery cell 100, a protection plate 200 and a device 300. A pole ear 400 is arranged at the head end of the battery cell. The pole ear 400 and the protection plate 200 are connected by a nickel sheet 500. The device 300 is arranged on the protection plate 200. The side of the nickel sheet 500 away from the protection plate 200 is connected to the top sealing edge 600 arranged at the head end of the battery cell 100 by a double-sided tape 700. The protection plate 200, the device 300, the pole ear 400, the nickel sheet 500, etc. are arranged at the head of the battery to form the head structure of the battery.

[0003] Figure 1 The battery is formed by using a commonly used packaging structure, wherein the nickel sheet 500 is arranged in a U shape, the tab 400 is sandwiched between the U-shaped nickel sheet 500, and the thickness of the head structure of the battery includes the thickness of the tab 400, the thickness of the two nickel sheets, the thickness of the protection plate 200, and the height of the highest device. The problem is that when the battery size remains unchanged, the head structure of the battery occupies a large space in the length direction of the battery, which reduces the length of the battery cell, thereby reducing the capacity of the battery. Utility Model Content

[0004] The purpose of the utility model is to provide a battery and a terminal device, so as to solve to a certain extent the technical problem existing in the prior art that when the battery size remains unchanged, the head structure of the battery occupies a large space in the length direction of the battery, which reduces the length of the battery cell and thus reduces the capacity of the battery.

[0005] The utility model provides a battery, comprising: a battery cell, an end of the battery cell is provided with a pole ear; a protection plate, arranged at the end of the battery cell, the thickness direction of the protection plate is the same as the length direction of the battery cell, the protection plate has a device surface for setting a first device, and the distance between the first device and the device surface is a first height; a connecting piece, the connecting piece comprises a connecting section and a bending section connected in sequence, the connecting section is connected to one side of the protection plate, at least part of the bending section is located outside the device surface, the distance between the part of the bending section located outside the device surface and the device surface is a second height, and the second height is less than or equal to the first height; the projection of the part of the bending section located outside the device surface on the device surface does not overlap with the projection of the first device on the device surface, and the pole ear is connected to at least part of the bending section.

[0006] The utility model provides a battery in which the connecting piece includes a connecting section and a bending section, and the connecting section is connected to one side of the protective plate; at least part of the bending section is located outside the device surface, and is offset from the first device, and does not protrude from the first device, so that the length of the battery can at most include the height of the first device, the thickness of the tab, and the thickness of a connecting piece. Under the condition of the same component thickness and the thickness of other layer structures (for example, hot melt adhesive layer, etc.), compared with the battery length in the prior art including the thickness of the tab, the thickness of two nickel sheets, and the height of the first device, the thickness of the head structure of the battery provided by the utility model is reduced, and the head space occupied by the battery cell is reduced, so that the length of the battery cell can be increased relatively, thereby achieving a larger battery capacity and improving product competitiveness.

[0007] In addition, in the battery provided in this embodiment, the metal sheet can wrap the protection plate, so that the protection plate can be kept stable during processes such as injection molding, which facilitates processing.

[0008] Furthermore, the bending section includes a first bending section, a second bending section and a third bending section connected in sequence; the connecting section is connected to the first bending section; the protective plate includes a first side surface and a second side surface opposite to each other in the width direction, and a welding surface opposite to the device surface in the thickness direction; the connecting section is connected to the welding surface, the first bending section is located on the outside of the first side surface, the second bending section is located on the outside of the device surface, and the third bending section is located on the outside of the second side surface.

[0009] Furthermore, a second device is provided on the device surface, and the distance between the second device and the device surface is a third height, and the third height is smaller than the second height; the projection of the part of the bending section located outside the device surface on the device surface at least partially overlaps with the projection of the second device on the device surface.

[0010] Furthermore, the pole lug includes a first pole lug segment and a second pole lug segment connected to each other; the first pole lug segment is connected to the third bending segment, and the second pole lug segment is connected to the second bending segment.

[0011] Furthermore, the first pole lug segment is arranged on a side of the third bending segment facing the second side surface; and the second pole lug segment is arranged on a side of the second bending segment facing the device surface.

[0012] Furthermore, the battery also includes: a top seal, which is arranged at the end of the battery cell, the top seal is bent toward the end and extends along the width direction of the protective plate, the pole ear extends from the top seal, and the top seal is located between the protective plate and the end; an adhesive layer is arranged between the top seal and the protective plate.

[0013] Furthermore, in the width direction of the battery core, side sealing edges are provided on both sides of the battery core; the junction of the top sealing edge and the side sealing edge forms a packaging foot; and the protection plate is located between the two packaging feet.

[0014] Furthermore, there are multiple battery cells, and the multiple battery cells are arranged side by side along the width direction of the battery cells; and the protection plate is located between the two outermost packaging pins of two adjacent battery cells.

[0015] Furthermore, the protection plate is provided with an avoidance opening, and the two packaging pins of two adjacent battery cells that are close to each other can pass through the avoidance opening.

[0016] Furthermore, a notch is provided on the protection plate, and the notch forms the avoidance opening.

[0017] Furthermore, the battery further comprises: a protective body arranged at the end of the battery cell, wherein the protective body wraps the tab, the protection plate, the connecting sheet, the first device and the second device.

[0018] The utility model provides a terminal device, comprising a battery compartment and the above-mentioned battery, wherein the battery is installed in the battery compartment.

[0019] It should be understood that both the foregoing general description and the following specific embodiments are for the purpose of example and illustration and do not necessarily limit the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 It is a structural schematic diagram of a battery in the prior art;

[0022] Figure 2 A schematic diagram of the structure of a battery according to an embodiment of the utility model;

[0023] Figure 3 for Figure 2 A cross-sectional view of the battery shown;

[0024] Figure 4 for Figure 2A schematic diagram of the structure in which the tab is connected to the protection plate during the battery assembly process;

[0025] Figure 5 for Figure 4 The schematic diagram of the structure of the first flipping of the protection plate during the battery assembly process shown;

[0026] Figure 6 for Figure 4 The schematic diagram of the structure of the second flipping of the protection plate during the battery assembly process shown;

[0027] Figure 7 for Figure 4 The schematic diagram of the structure of the third flipping of the protection plate during the battery assembly process is shown.

[0028] icon:

[0029] 1-Battery cell;

[0030] 2-ear; 21-first ear segment; 22-second ear segment;

[0031] 3-connecting piece; 31-connecting section; 32-first bending section; 33-second bending section; 34-third bending section;

[0032] 4-protection plate; 41-welding surface; 42-device surface; 43-first side surface; 44-second side surface; 45-avoidance.

[0033] 5- first device;

[0034] 6- second device;

[0035] 7- Top edge sealing;

[0036] 8-Side sealing;

[0037] 9-Package pin;

[0038] 10-adhesive layer;

[0039] 20-protection body;

[0040] 30-hot melt adhesive layer. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0047] It should be noted that the "x" direction in the accompanying drawings represents the length direction of the battery cell 1, and the thickness direction of the protective plate 4 is the same as the length direction of the battery cell 1; the "y" direction represents the width direction of the battery cell 1, and the length direction of the protective plate 4 is the same as the width direction of the battery cell 1; the "z" direction represents the thickness direction of the battery cell 1, and the width direction of the protective plate 4 is the same as the thickness direction of the battery cell 1.

[0048] like Figure 2 and Figure 3As shown, the utility model provides a battery, a battery cell 1, an end of the battery cell 1 is provided with a pole ear 2; a protection plate 4 is arranged at the end of the battery cell 1, the thickness direction of the protection plate 4 is the same as the length direction of the battery cell 1, the protection plate 4 has a device surface 42 for setting a first device 5, and the distance between the first device 5 and the device surface 42 is a first height H1 (which can be understood as the distance from a side of the first device 5 away from the device surface 42 to the device surface 42); a connecting piece 3, the connecting piece 3 includes a connecting section 31 and a bending section connected in sequence, the connecting section 31 is connected to one side of the protection plate 4, and at least a part of the bending section is located at the device surface 42. On the outside, the distance between the portion of the bending section located on the outside of the device surface 42 and the device surface 42 is a second height H2 (which can be understood as the distance from the side of the portion of the bending section located on the outside of the device surface 42 away from the device surface 42 to the device surface 42), and the second height H2 is less than or equal to the first height H1 (which can also be understood as in the thickness direction of the protective plate 4, the portion of the bending section located on the outside of the device surface 42 does not protrude from the first device 5); the projection of the portion of the bending section located on the outside of the device surface 42 on the device surface 42 does not overlap with the projection of the first device 5 on the device surface 42, and the pole ear 2 and at least part of the bending section

[0049] Among them, the projection of the part of the bending section located on the outer side of the device surface 42 (the side of the protective plate 4 away from the battery cell 1) on the device surface 42 does not overlap with the projection of the first device 5 on the device surface 42, which means that the part of the bending section located on the outer side of the device surface 42 is projected on the device surface 42 as a first projection, and the first device 5 is projected on the device surface 42 as a second projection. The first projection and the second projection are independent of each other and have no overlapping parts. It can also be understood that the first projection and the second projection are completely staggered, that is, the part of the bending portion located on the outer side of the device surface 42 is completely avoided by the first device 5.

[0050] For the convenience of description, it is defined as follows: one of the two opposite side surfaces along the width direction of the protection is a first side surface 43 and the other is a second side surface 44; of the two opposite board surfaces along the thickness direction (one of which is a board surface used for installing devices and is a device surface 42), the board surface close to the battery cell 1 is the first board surface, and the board surface away from the battery cell 1 is the second board surface; in the width direction of the protection plate 4, the part where the tab 2 extends out of the battery cell 1 and the first side surface 43 are respectively located on both sides of the protection plate 4.

[0051] The structure of the connecting piece 3 and the structure of the tab 2 include at least the following:

[0052] The first type: the connecting section 31 is connected to the first plate surface, the first plate surface is the device surface 42, the bending section is four sections, the first section of the bending section is connected to the connecting section 31 and is located outside the first side surface 43 ("outside" refers to the direction away from the protective plate 4), the second section of the bending section is located outside the second plate surface, the third section of the bending section is located outside the third side surface, and the fourth section of the bending section is located outside the first plate surface. The pole ear 2 can be connected to the fourth section of the bending section, regardless of whether the pole ear 2 is located on the outside or inside of the bending section (the outside refers to the side away from the protective plate 4, and the inside is the side close to the protective plate 4). By setting the pole ear 2 and the fourth section of the bending section in the thickness direction of the protective plate 4, the first device 5 can be set to achieve the length of the battery including the first height H1 and the thickness of the second section of the bending section (that is, the thickness of one connecting piece 3). The pole ear 2 can also be connected to the third section of the bending section. Regardless of whether the pole ear 2 is located on the outside or inside of the bending section, the length of the battery includes the first height H1 and the thickness of the second section of the bending section (that is, the thickness of one connecting piece 3). The tab 2 can also be connected to the third section of the bending section and the second section of the bending section in sequence, and the fourth section of the bending section does not protrude from the first device 5. In this case, no matter whether the tab 2 is located on the outside or inside of the bending section, the thickness of the battery includes the first height H1, the thickness of the second section of the bending section (that is, the thickness of a connecting piece 3), and the thickness of the tab 2. The tab 2 can also be connected to the third section of the bending section, the second section of the bending section, and the first section of the bending section in sequence. No matter whether the tab 2 is located on the outside or inside of the bending section, the thickness of the battery includes the first height H1, the thickness of the second section of the bending section (that is, the thickness of a connecting piece 3), and the thickness of the tab 2.

[0053] The second type: the connecting section 31 is connected to the first plate surface, the second plate surface is the device surface 42, the bending section is divided into two sections, the first section of the bending section is connected to the connecting section 31 and is located outside the first side surface 43, and the second section of the bending section is located outside the second plate surface. The pole ear 2 can be connected to the second section of the bending section. Regardless of whether the pole ear 2 is located outside or inside the bending section, the pole ear 2 and the second section of the bending section do not protrude from the first device 5 in the thickness direction of the protective plate 4, so that the length of the battery includes the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting piece 3). The pole ear 2 can also be connected to the second section of the bending section and the first section of the bending section in sequence. The pole ear 2 and the second section of the bending section do not protrude from the first device 5 in the thickness direction of the protective plate 4, so that the length of the battery includes the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting piece 3), etc.

[0054] The third type: the connecting section 31 is connected to the first side surface 43, the first plate surface is the device surface 42, the bending section is one section, and the bending section is located outside the first plate surface. Regardless of whether the tab 2 is located outside or inside the bending section, the tab 2 and the bending section do not protrude from the first device 5 in the thickness direction of the protection plate 4, so that the length of the battery includes the first height H1, but does not include the thickness of the tab 2 and the thickness of the connecting sheet 3.

[0055] The fourth type: the connecting section 31 is connected to the first side surface 43, the first plate surface is the device surface 42, the bending section is divided into two sections, the first section of the bending section is connected to the connecting section 31 and is located outside the first plate surface, and the second section of the bending section is located outside the second side surface 44. The pole lug 2 can be connected to the first section of the bending section. Regardless of whether the pole lug 2 is located outside or inside the bending section, the pole lug 2 and the bending section do not protrude from the first device 5 in the thickness direction of the protective plate 4, so that the length of the battery includes the first height H1, but does not include the thickness of the pole lug 2 and the thickness of the connecting sheet 3. The pole lug 2 can be connected to the second section of the bending section. Regardless of whether the pole lug 2 is located outside or inside the bending section, the first section of the bending section does not protrude from the first device 5, and the length of the battery includes the first height H1, etc.

[0056] The fifth type: the connecting section 31 is connected to the first side surface 43, the first board surface is the device surface 42, the bending section is three sections, the first section of the bending section is connected to the connecting section 31 and is located on the outside of the first board surface, the second section of the bending section is located on the outside of the second side surface 44, and the third section of the bending section is located on the outside of the second board surface. The pole ear 2 can be connected to the first section of the bending section. Regardless of whether the pole ear 2 is located on the outside or inside of the bending section, the pole ear 2 and the bending section do not protrude from the first device 5 setting in the thickness direction of the protective plate 4, so that the length of the battery includes the first height H1 and the thickness of the third section of the bending section (that is, the thickness of one connecting piece 3). The pole ear 2 can be connected to the second section of the bending section. Regardless of whether the pole ear 2 is located on the outside or inside of the bending section, the first section of the bending section does not protrude from the first device 5 setting, and the length of the battery includes the first height H1 and the thickness of the third section of the bending section (that is, the thickness of one connecting piece 3). The tab 2 can also be connected to the second section and the third section of the bending section in sequence. If the first section of the bending section does not protrude from the first device 5, the length of the battery includes the first height H1, the thickness of one tab 2 and the thickness of the third section of the bending section (that is, the thickness of one connecting piece 3).

[0057] The sixth type: the connecting section 31 is connected to the first side surface 43, the first board surface is the device surface 42, the bending section is three sections, the first section of the bending section is connected to the connecting section 31 and is located on the outside of the second board surface, the second section of the bending section is located on the outside of the second side surface 44, and the third section of the bending section is located on the outside of the first board surface. The pole ear 2 can be connected to the third section of the bending section. Regardless of whether the pole ear 2 is located on the outside or inside of the bending section, the pole ear 2 and the bending section do not protrude from the first device 5 setting in the thickness direction of the protective plate 4, so that the length of the battery includes the first height H1 and the thickness of the first section of the bending section (that is, the thickness of one connecting piece 3). The pole ear 2 can be connected to the second section of the bending section. Regardless of whether the pole ear 2 is located on the outside or inside of the bending section, the third section of the bending section does not protrude from the first device 5 setting, and the length of the battery includes the first height H1 and the thickness of the first section of the bending section (that is, the thickness of one connecting piece 3). The tab 2 can also be connected to the second section of the bending section and the first section of the bending section in sequence, and the third section of the bending section does not protrude from the first device 5. The length of the battery then includes the first height H1, the thickness of one tab 2 and the thickness of the first section of the bending section (that is, the thickness of one connecting piece 3), etc.

[0058] The seventh type: the connecting section 31 is connected to the first side surface 43, the second plate surface is the device surface 42, the bending section is one section, and the bending section is located on the outside of the second plate surface. The tab 2 can be bent and connected to the bending section. Regardless of whether the tab 2 is located on the outside or inside of the bending section, it can be arranged in the thickness direction of the protective plate 4 so that the tab 2 and the bending section do not protrude. The first device 5 can be arranged to achieve that the length of the battery includes the first height H1, but does not include the thickness of the tab 2 and the thickness of the connecting sheet 3.

[0059] The eighth type: the connecting section 31 is connected to the first side surface 43, the second plate surface is the device surface 42, the bending section is divided into two sections, the first section of the bending section is connected to the connecting plate and is located on the outside of the second plate surface, and the second section of the bending section is located on the outside of the second side surface 44. The pole tab 2 can be connected to the second section of the bending section, and the first section of the bending section does not protrude from the first device 5 setting. In this case, no matter whether the pole tab 2 is located on the outside or inside of the bending section, the length of the battery includes the first height H1, but does not include the thickness of the pole tab 2 and the thickness of the connecting sheet 3. The pole tab 2 can be connected to the second section of the bending section and the first section of the bending section in sequence. No matter whether the pole tab 2 is located on the outside or inside of the bending section, by setting the first section of the bending section and the pole tab 2 not protruding from the first device 5 setting, the length of the battery includes the first height H1, but does not include the thickness of the pole tab 2 and the thickness of the connecting sheet 3, etc.

[0060] Ninth type: the connecting section 31 is connected to the first side surface 43, the second board surface is the device surface 42, the bending section is divided into three sections, the first section of the bending section is connected to the connecting section 31 and is located on the outside of the second board surface, the second section of the bending section is located on the outside of the second side surface 44, and the third section of the bending section is located on the outside of the first board surface. The pole lug 2 can be directly connected to the third section of the bending section, and the first section of the bending section does not protrude from the first device 5 setting, then the length of the battery includes the first height H1, the thickness of the pole lug 2 and the thickness of the third section of the bending section (that is, the thickness of one connecting piece 3). The pole lug 2 can be connected to the second section of the bending section, regardless of whether the pole lug 2 is located on the outside or inside of the bending section, and the first section of the bending section does not protrude from the first device 5 setting, then the length of the battery includes the first height H1 and the thickness of the third section of the bending section (that is, the thickness of one connecting piece 3). The pole ear 2 can also be connected to the second section and the first section of the bending section in sequence. Regardless of whether the pole ear 2 is located on the outside or inside of the bending section, the first section of the bending section and the pole ear 2 are not protruded from the first device 5. The length of the battery can include the first height H1 and the thickness of the third section of the bending section (that is, the thickness of a connecting piece 3).

[0061] The tenth type: the connecting section 31 is connected to the first side surface 43, the second board surface is the device surface 42, the bending section is three sections, the first section of the bending section is connected to the connecting section 31 and is located on the outside of the first board surface, the second section of the bending section is located on the outside of the second side surface 44, and the third section of the bending section is located on the outside of the second board surface. The tab 2 can be connected to the first section of the bending section, and the third section of the bending section does not protrude from the first device 5 setting, then the length of the battery includes the first height H1, the thickness of the tab 2 and the thickness of the first section of the bending section (that is, the thickness of one connecting piece 3). The tab 2 can be connected to the second section of the bending section, regardless of whether the tab 2 is located on the outside or inside of the bending section, and the third section of the bending section does not protrude from the first device 5 setting, then the length of the battery includes the first height H1 and the thickness of the first section of the bending section (that is, the thickness of one connecting piece 3). The pole ear 2 can also be connected to the second section and the third section of the bending section in sequence. Regardless of whether the pole ear 2 is located on the outside or inside of the bending section, the third section of the bending section and the pole ear 2 do not protrude from the first device 5. The length of the battery can include the first height H1 and the thickness of the first section of the bending section (that is, the thickness of a connecting piece 3).

[0062] Type 11: The connecting section 31 is connected to the second plate surface, the first plate surface is the device surface 42, the bending section is divided into two sections, the first section of the bending section is located on the outside of the second side surface 44, and the second section of the bending section is located on the outside of the first plate surface. The pole lug 2 is connected to the first section of the bending section, and the second section of the bending section does not protrude from the first device 5 setting. Therefore, regardless of whether the pole lug 2 is located on the outside or inside of the bending section, the length of the battery includes the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting piece 3). The pole lug 2 can also be connected to the second section of the bending section. Regardless of whether the pole lug 2 is located on the outside or inside of the bending section, the second section of the bending section and the pole lug 2 are arranged not to protrude from the first device 5 setting to achieve the length of the battery including the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting piece 3).

[0063] The twelfth type: the connecting section 31 is connected to the second plate surface, the first plate surface is the device surface 42, the bending section is three sections, the first section of the bending section is connected to the connecting plate and is located outside the second side surface 44, the second section of the bending section is located outside the first plate surface, and the third section of the bending section is located outside the first side surface 43. The pole lug 2 is connected to the first section of the bending section, and the second section of the bending section does not protrude from the first device 5 setting. Therefore, no matter whether the pole lug 2 is located outside or inside the bending section, the length of the battery includes the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting piece 3). The pole lug 2 can also be connected to the second section of the bending section. No matter whether the pole lug 2 is located outside or inside the bending section, the second section of the bending section and the pole lug 2 are set not to protrude from the first device 5 setting to achieve the length of the battery including the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting piece 3). The pole ear 2 can also be connected to the second section and the third section of the bending section in sequence. Regardless of whether the pole ear 2 is located on the outside or inside of the bending section, by setting the second section of the bending section and the pole ear 2 not to protrude from the first device 5, the length of the battery can be achieved including the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting piece 3).

[0064] Thirteenth type: the connecting section 31 is connected to the second plate surface, the second plate surface is the device surface 42, the bending section is four sections, the first section of the bending section is connected to the connecting section 31 and is located outside the second side surface 44, the second section of the bending section is located outside the first plate surface, the third section of the bending section is located outside the first side surface 43, and the fourth section of the bending section is located outside the second plate surface. The pole ear 2 can be connected to the first section of the bending section, and the fourth section of the bending section does not protrude from the first device 5 setting. In this case, no matter whether the pole ear 2 is located outside or inside the bending section, the length of the battery includes the first height H1 and the thickness of the second section of the bending section (that is, the thickness of one connecting sheet 3). The pole ear 2 can be connected to the first section of the bending section and the fourth section of the bending section in sequence. No matter whether the pole ear 2 is located outside or inside the bending section, the fourth section of the bending section and the pole ear 2 do not protrude from the first device 5 setting to achieve the length of the battery including the first height H1 and the thickness of the second section of the bending section (that is, the thickness of one connecting sheet 3). The tab 2 can be connected to the first section of the bending section, the fourth section of the bending section and the third section of the bending section in sequence. Regardless of whether the tab 2 is located on the outside or inside of the bending section, the fourth section of the bending section and the tab 2 are not protruded from the first device 5, so that the length of the battery includes the first height H1 and the thickness of the second section of the bending section (that is, the thickness of one connecting piece 3). The tab 2 can be connected to the first section of the bending section, the fourth section of the bending section, the third section of the bending section and the second section of the bending section in sequence. Regardless of whether the tab 2 is located on the outside or inside of the bending section, the fourth section of the bending section and the tab 2 are not protruded from the first device 5, so that the length of the battery includes the first height H1, the thickness of the tab 2 and the thickness of the second section of the bending section (that is, the thickness of one connecting piece 3). The pole lug 2 can be connected to the second section of the bending section, and the four sections of the bending section do not protrude from the first device 5. Therefore, no matter whether the pole lug 2 is located on the outside or inside of the bending section, the length of the battery includes the first height H1, the thickness of the pole lug 2, and the thickness of the second section of the bending section (that is, the thickness of one connecting piece 3). The pole lug 2 can be connected to the second section of the bending section and the third section of the bending section in sequence. The four sections of the bending section do not protrude from the first device 5. Therefore, no matter whether the pole lug 2 is located on the outside or inside of the bending section, the length of the battery includes the first height H1, the thickness of the pole lug 2, and the thickness of the second section of the bending section (that is, the thickness of one connecting piece 3). The pole lug 2 can be connected to the second section of the bending section, the third section of the bending section, and the fourth section of the bending section in sequence. No matter whether the pole lug 2 is located on the outside or inside of the bending section, the fourth section of the bending section and the pole lug 2 do not protrude from the first device 5, so that the length of the battery includes the first height H1, the thickness of the pole lug 2, and the thickness of the second section of the bending section (that is, the thickness of one connecting piece 3).The pole lug 2 can be connected to the second section of the bending section, the third section of the bending section, the fourth section of the bending section, and the first section of the bending section in sequence. Regardless of whether the pole lug 2 is located on the outside or inside of the bending section, by arranging that the fourth section of the bending section and the pole lug 2 do not protrude from the first device 5, the length of the battery can be achieved, including the first height H1, the thickness of the pole lug 2 and the thickness of the second section of the bending section (that is, the thickness of a connecting piece 3).

[0065] Fourteenth: the connecting section 31 is connected to the second side surface 44, the first plate surface is the device surface 42, the bending section is one section, and the bending section is arranged outside the first plate surface. Then, no matter whether the tab 2 is located outside or inside the bending section, by setting the bending section and the tab 2 not to protrude from the first device 5, the length of the battery includes the first height H1, but does not include the thickness of the tab 2 and the thickness of the connecting sheet 3.

[0066] Fifteenth type: the connecting section 31 is connected to the second side surface 44, the first plate surface is the device surface 42, the bending section is divided into two sections, the first section of the bending section is located outside the first plate surface, and the second section of the bending section is located outside the first side surface 43. The tab 2 can be connected to the first section of the bending section. No matter whether the tab 2 is located outside or inside the bending section, the length of the battery includes the first height H1, but does not include the thickness of the tab 2 and the thickness of the connecting sheet 3, by setting the bending section and the tab 2 not protruding from the first device 5. The tab 2 can be connected to the first section of the bending section and the second section of the bending section in sequence. No matter whether the tab 2 is located outside or inside the bending section, the length of the battery includes the first height H1, but does not include the thickness of the tab 2 and the thickness of the connecting sheet 3, by setting the bending section and the tab 2 not protruding from the first device 5.

[0067] Sixteenth type: the connecting section 31 is connected to the second side surface 44, the first plate surface is the device surface 42, the bending section is three sections, the first section of the bending section is located outside the first plate surface, the second section of the bending section is located outside the first side surface 43, and the third section of the bending section is located outside the second plate surface. The pole lug 2 can be connected to the first section of the bending section. No matter whether the pole lug 2 is located outside or inside the bending section, the bending section and the pole lug 2 are not protruded from the first device 5, so that the length of the battery includes the first height H1, but does not include the thickness of the pole lug 2 and the thickness of the connecting sheet 3. The pole lug 2 can be connected to the first section of the bending section and the second section of the bending section in sequence. No matter whether the pole lug 2 is located outside or inside the bending section, the bending section and the pole lug 2 are not protruded from the first device 5, so that the length of the battery includes the first height H1, but does not include the thickness of the pole lug 2 and the thickness of the connecting sheet 3. The pole lug 2 can be connected to a first section of the bending section, a second section of the bending section, and a third section of the bending section in sequence. Regardless of whether the pole lug 2 is located on the outside or inside of the bending section, by setting the bending section and the pole lug 2 not to protrude from the first device 5, the length of the battery can be achieved, including the first height H1, the thickness of the pole lug 2, and the thickness of the third section of the bending section (that is, the thickness of a connecting piece 3).

[0068] Seventeenth type: the connecting section 31 is connected to the second side surface 44, the second plate surface is the device surface 42, the bending section is one section, and the bending section is arranged outside the second plate surface. Then, no matter whether the tab 2 is located outside or inside the bending section, by setting the bending section and the tab 2 not to protrude from the first device 5, the length of the battery includes the first height H1, but does not include the thickness of the tab 2 and the thickness of the connecting sheet 3.

[0069] Eighteenth type: the connecting section 31 is connected to the second side surface 44, the second plate surface is the device surface 42, the bending section is divided into two sections, the first section of the bending section is located outside the second plate surface, and the second section of the bending section is located outside the first side surface 43. The tab 2 can be bent along the second side surface 44 and the second plate surface and connected to the first section of the bending section. Then, no matter whether the tab 2 is located outside or inside the bending section, the bending section and the tab 2 are not protruded from the first device 5, so that the length of the battery includes the first height H1, but does not include the thickness of the tab 2 and the thickness of the connecting sheet 3. The tab 2 can be connected to one section of the bending section and the second section of the bending section in sequence. Then, no matter whether the tab 2 is located outside or inside the bending section, the bending section and the tab 2 are not protruded from the first device 5, so that the length of the battery includes the first height H1, but does not include the thickness of the tab 2 and the thickness of the connecting sheet 3.

[0070] Nineteenth type: the connecting section 31 is connected to the second side surface 44, the second board surface is the device surface 42, the bending section is three sections, the first section of the bending section is located outside the second board surface, the second section of the bending section is located outside the first side surface 43, and the third section of the bending section is located outside the first board surface. The pole lug 2 can be connected to the first section of the bending section. No matter whether the pole lug 2 is located outside or inside the bending section, the first section of the bending section and the pole lug 2 are not protruded from the first device 5, so that the length of the battery includes the first height H1, the thickness of the third section of the bending section (that is, the thickness of a connecting sheet 3), but does not include the thickness of the pole lug 2. The pole lug 2 can be connected to the first section of the bending section and the second section of the bending section in sequence. No matter whether the pole lug 2 is located outside or inside the bending section, the first section of the bending section and the pole lug 2 are not protruded from the first device 5, so that the length of the battery includes the first height H1, the thickness of the third section of the bending section (that is, the thickness of a connecting sheet 3), but does not include the thickness of the pole lug 2. The pole lug 2 can be connected to a first section of the bending section, a second section of the bending section, and a third section of the bending section in sequence. No matter whether the pole lug 2 is located on the outside or inside of the bending section, the length of the battery including the first height H1, the thickness of the pole lug 2, and the thickness of the third section of the bending section (i.e., the thickness of a connecting piece 3) can be achieved by setting the first section of the bending section and the pole lug 2 not to protrude from the first device 5. The pole lug 2 can be connected to the third section of the bending section, and the first section of the bending section does not protrude from the first device 5. The length of the battery includes the first height H1, the thickness of the pole lug 2, and the thickness of the third section of the bending section (i.e., the thickness of a connecting piece 3). The pole lug 2 can be connected to the third section of the bending section and the second section of the bending section in sequence. The first section of the bending section does not protrude from the first device 5. The length of the battery includes the first height H1, the thickness of the pole lug 2, and the thickness of the third section of the bending section (i.e., the thickness of a connecting piece 3). The pole lug 2 can be connected to the third section of the bending section, the second section of the bending section, and the first section of the bending section in sequence. Regardless of whether the pole lug 2 is located on the outside or inside of the bending section, by setting the first section of the bending section and the pole lug 2 not to protrude from the first device 5, the length of the battery can be achieved, including the first height H1, the thickness of the pole lug 2, and the thickness of the third section of the bending section (that is, the thickness of a connecting piece 3).

[0071] It should be noted that the above is only an example and is not intended to limit the connection sheet 3 and the tab 2. Optionally, the tab 2 is arranged on the inner side of the bending section (ie, the side of the bending section close to the protection plate) for easy processing and assembly.

[0072] It can be understood that when the connecting section 31 is located on the device surface 42, since the connecting section 31 is in close contact with the device surface 42, the portion of the bending section located on the outside of the device surface 42 is not lower than the connecting section 31, and the portion of the bending section located on the device surface 42 does not protrude from the first device 5, then the connecting section 31 is lower than the first device 5, and the connecting section 31 does not protrude from the first device 5.

[0073] Therefore, in the battery provided in this embodiment, the connecting piece 3 includes a connecting section 31 and a bending section, and the connecting section 31 is connected to one side of the protective plate 4; at least part of the bending section is located outside the device surface 42, and is offset from the first device 5, and does not protrude from the first device 5, so that the length of the battery can at most include the height of the first device 5, the thickness of the tab 2, and the thickness of a connecting piece 3. Under the condition of the same component thickness and the thickness of other layer structures (for example, the hot melt adhesive layer 30, etc.), compared with the battery length in the prior art including the thickness of the tab 2, the thickness of two nickel sheets (that is, the thickness of the connecting piece 3) and the height of the first device 5, the thickness of the head structure of the battery provided in this embodiment is reduced, and the head space occupied by the battery cell 1 is reduced, so that the length of the battery cell 1 can be increased relatively, thereby achieving a larger battery capacity and improving product competitiveness.

[0074] In addition, in the battery provided in this embodiment, the connecting sheet 3 can at least partially wrap the protection plate 4, so that the protection plate 4 can be kept stable during the injection molding process, etc., and the processing is convenient.

[0075] The connecting sheet 3 is preferably a nickel sheet, one end of the nickel sheet is welded to the pole lug 2 , and the other end is welded to the protection plate 4 , so as to connect the pole lug 2 to the protection plate 4 .

[0076] As an alternative, Figure 3 As shown, the bending section includes a first bending section 32, a second bending section 33 and a third bending section 34 connected in sequence (that is, the bending section consists of three sections); the connecting section 31 is connected to the first bending section 32; the protective plate 4 includes a first side surface 43 and a second side surface 44 opposite to each other in the width direction, and a welding surface 41 opposite to the device surface 42 in the thickness direction (that is, one of the first plate surface and the second plate surface is the device surface 42, and the other is the welding surface 41); the connecting section 31 is connected to the welding surface 41, the first bending section 32 is located on the outside of the first side surface 43, the second bending section 33 is located on the outside of the device surface 42, and the third bending section 34 is located on the outside of the second side surface 44.

[0077] In this embodiment, the connecting section 31 is located on the welding surface 41 of the protection plate 4, and the bending section is bent by the connecting section 31 along the first side surface 43, the device surface 42 and the second side surface 44, which is convenient for welding and processing.

[0078] Among them, the tab 2 can be arranged to be connected to the third bending section 34, and the second bending section 33 does not protrude from the first device 5. Then, no matter whether the tab 2 is located on the inner side or the outer side of the third bending section 34, the length of the battery includes the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting piece 3). It can be arranged that the tab 2 is sequentially connected to the third bending section 34, the second bending section 33 and the first bending section 32. Then, no matter whether the tab 2 is located on the inner side or the outer side of the third bending section 34, the length of the battery includes the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting piece 3) by arranging the second bending section 33 and the tab 2 not to protrude from the first device 5.

[0079] As an alternative, Figure 3 As shown, the pole lug 2 includes a first pole lug segment 21 and a second pole lug segment 22 connected to each other; the first pole lug segment 21 is connected to the third bending segment 34 , and the second pole lug segment 22 is connected to the second bending segment 33 .

[0080] In this embodiment, the pole lug 2 is bent in sequence to form a first pole lug section 21 and a second pole lug section 22. The first pole lug section 21 is connected to the third bending section 34, and the second pole lug section 22 is connected to the third bending section 34. The welding surface 41 of the bending section and the pole lug 2 is large, the connection is firm, and the pole lug 2 is prevented from being too long. In addition, by setting the second pole lug section 22 and the second bending section 33 not to protrude from the first device 5, the battery length can be realized including the first height H1 and the thickness of the connecting section 31 (that is, the thickness of one connecting sheet 3), and the thickness of the head structure of the battery is further reduced, and the head space occupied by the head structure of the battery cell 1 is reduced.

[0081] The first pole tab segment 21 may be disposed on a side of the third bending segment 34 away from the second side surface 44 , and the second pole tab segment 22 may be disposed on a side of the second bending segment 33 away from the device surface 42 .

[0082] As an optional solution, the first pole lug segment 21 is arranged on the side of the third bending segment 34 facing the second side surface 44; the second pole lug segment 22 is arranged on the side of the second bending segment 33 facing the device surface 42, so as to facilitate welding of the pole lug 2 and the bending segment.

[0083] Taking the case where the welding surface 41 is arranged close to the battery cell 1 as an example (this is just an example and not a limitation) to explain the connection process of the pole ear 2, the connecting piece 3 and the protection plate 4: first, the welding of the pole ear 2 and the bending section is completed; then, as shown in FIG. Figure 4 As shown, the welding surface 41 of the protection plate 4 can be placed horizontally, and the connecting section 31 of the connecting piece 3 is welded to the welding surface 41; then, as shown in FIG. Figure 5 As shown, the protection plate 4 is turned over 90 degrees for the first time; then, as shown Figure 6 As shown, the protection plate 4 is turned over 90 degrees for the second time; then Figure 6As shown, the protection plate 4 is flipped 90 degrees for the third time, so that the protection plate 4 is close to the top sealing edge 7, and the pole ear 2 and the connecting sheet 3 are bent along with the protection plate 4.

[0084] Based on the above embodiment, further, Figure 2 and Figure 3 As shown, the device surface 42 is also provided with a second device 6, and the distance between the second device 6 and the device surface 42 is a third height H3 (which can be understood as the distance from a side of the second device 6 away from the device surface 42 to the device surface 42), and the third height H3 is smaller than the second height H2; the projection of the part of the bending section located on the outer side of the device surface 42 on the device surface 42 at least partially overlaps with the projection of the second device 6 on the device surface 42.

[0085] In this embodiment, the third height H3 is smaller than the second height H2. Since the second height H2 is smaller than the first height H1, the third height H3 is smaller than the first height H1. Therefore, the height of the second device 6 on the device surface 42 is smaller than the height of the first device 5 on the device surface 42. It can also be understood that multiple devices are arranged on the device surface 42, and the multiple devices also include the tallest device with the largest height and short devices whose height is smaller than the tallest device. It should be noted that "short" is relative to "tallest". The short device is shorter than the tallest device, and the tallest device is taller than the remaining devices among the multiple devices.

[0086] The projection of the portion of the bending section located outside the device surface 42 on the device surface 42 at least partially overlaps with the projection of the second device 6 on the device surface 42. It can be understood that the portion of the bending section located outside the device surface 42 is projected on the device surface 42 as a first projection, and the second device 6 is projected on the device surface 42 as a third projection. The first projection and the third projection completely overlap or partially overlap, or one of the first projection and the third projection completely covers or partially covers the other, that is, the portion of the bending section located outside the device surface 42 can be at least partially bypassed by the outside of the second device 6.

[0087] Among them, the range of the first height H1 can be 0.1mm-2mm (for example: 0.2mm, 0.3mm, 0.7mm, 1.0mm, 1.3mm, 1.7mm, 1.8mm or 2.0mm, etc.), the range of the third height H3 can be 0.1mm-2mm (for example: 0.1mm, 0.2mm, 0.5mm, 1.0mm, 1.2mm, 1.5mm, 1.7mm or 1.9mm, etc.), the thickness of the metal sheet can be 0.01mm-1mm (for example: 0.01mm, 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm or 1mm, etc.), the thickness of the protective plate 4 is 01.mm-2mm (for example: 0.1mm, 0.4mm, 0.6mm, 1.0mm, 1.4mm, 1.6mm, 1.9mm or 2.0mm, etc.). It is understandable that if the third height H3 is less than the first height H1, a suitable height value can be selected within the corresponding value range. If the second height H2 is less than the first height H1 and greater than the third height H3, the position of the portion of the bending section located outside the device surface 42 can be set according to this condition.

[0088] An insulating layer may be provided on the second device 6 , and the provision of the insulating layer may prevent the second device 6 from contacting the connecting sheet 3 and affecting related electrical performance.

[0089] like Figure 2 As shown, based on the above embodiment, further, a top seal 7 is provided at the end of the battery cell 1, the top seal 7 is bent toward the end and extends along the width direction of the protection plate 4, the tab 2 extends from the top seal 7, and the top seal 7 is located between the protection plate 4 and the end. The top seal 7 can protect the battery cell 1.

[0090] like Figure 2 As shown, based on the above embodiment, further, an adhesive layer 10 is provided between the top sealing edge 7 and the protection plate 4 .

[0091] In this embodiment, the top sealing edge 7 and the protection plate 4 are connected together by the adhesive layer 10, so that the protection plate 4 is fixed and stable.

[0092] Among them, the adhesive layer 10 can be made of non-woven double-sided tape, tissue paper double-sided tape, double-sided glass cloth tape, PET double-sided tape, foam double-sided tape, hot melt tape, PET tape, substrate-free tape, acetate cloth tape or PVC tape, etc.

[0093] like Figure 2 and Figure 7As shown, based on the above embodiment, further, in the width direction of the battery cell 1, side sealing edges 8 are provided on both sides of the battery cell 1; the junction of the top sealing edge 7 and the side sealing edge 8 forms a packaging foot 9; and the protective plate 4 is located between the two packaging feet 9.

[0094] In this embodiment, a space is formed between the packaging feet 9 on both sides of the battery, and the protection plate 4 is located in the space, which can make the protection plate 4 closer to the end of the battery cell 1, so that the head structure occupies less space, which is conducive to further improving the battery capacity.

[0095] Based on the above embodiments, the battery provided in the embodiments of the utility model may include a battery cell 1 , on which two pole tabs 2 are provided, and there are two connecting plates 3 , which are connected to the two pole tabs 2 in a one-to-one correspondence.

[0096] Alternatively, the battery provided in the embodiment of the utility model includes a plurality of battery cells 1 (two, three, four or five, etc., Figures 3 to 6 The battery shown includes two battery cells 1, which is only an example and not a limitation. There are multiple battery cells 1, and the multiple battery cells 1 are arranged side by side along the width direction of the battery cells 1; the protection plate 4 is located between the two outermost packaging pins 9 of two adjacent battery cells 1.

[0097] like Figure 2 As shown, based on the above embodiment, further, a avoidance opening 45 is provided on the protection plate 4 , and two adjacent packaging pins 9 of two adjacent battery cells 1 can pass through the avoidance opening 45 .

[0098] In the present embodiment, between two adjacent battery cells 1, there is a packaging foot 9 on the side close to each other, so that two adjacent packaging feet 9 are formed, and the two adjacent packaging feet 9 correspond to the plate surface of the protection plate 4. The protection plate 4 is provided with an avoidance opening 45, and the packaging foot 9 can pass through the avoidance opening 45. In this way, on the one hand, it is avoided that the protection plate 4 interferes with the packaging foot 9, and on the other hand, it is avoided that a protrusion protruding outward (away from the battery cell 1) is provided on the protection plate 4 to form a cavity for accommodating the packaging foot 9, thereby avoiding increasing the overall thickness of the protection plate 4 and avoiding increasing the length of the battery.

[0099] The avoidance opening 45 may be a through hole provided on the protection plate 4 .

[0100] As an alternative, Figure 6 As shown, a notch is provided on the protection plate 4 , and the notch forms an avoidance opening 45 , which facilitates the molding and processing of the protection plate 4 .

[0101] like Figure 3As shown, based on the above embodiment, the battery further includes: a protective body 20 arranged at the end of the battery cell 1, and the protective body 20 wraps the pole ear 2, the protection plate 4, the connecting piece 3, the first device 5 and the second device 6.

[0102] In this embodiment, the protective body 20 can be formed by injection molding, and the protective body 20 can encapsulate the protective plate 4, the tab 2, the connecting piece 3, the first device 5 and the second device 6, so as to play the role of sealing, insulation and protection.

[0103] The utility model also provides a terminal device (such as a mobile phone or a tablet computer, etc.), including a battery compartment and a battery of any of the above technical solutions, and the battery is installed in the battery compartment. Therefore, the terminal device provided by this embodiment includes all the beneficial effects of the battery. In addition, the capacity of the battery is improved, so that the battery life of the terminal device provided by this embodiment is improved.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them; although the utility model is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model. In the description provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means being within the scope of the utility model and forming different embodiments.

Claims

1. A battery, characterized in that: include: A battery cell, wherein a pole ear is provided at the end of the battery cell; A protection plate is arranged at the end of the battery cell, the thickness direction of the protection plate is the same as the length direction of the battery cell, the protection plate has a device surface for arranging a first device, and the distance between the first device and the device surface is a first height; A connecting piece, the connecting piece comprising a connecting section and a bending section connected in sequence, the connecting section being connected to one side of the protection plate, at least a portion of the bending section being located outside the device surface, a portion of the bending section located outside the device surface being at a distance from the device surface by a second height, and the second height being less than or equal to the first height; A projection of a portion of the bending section located outside the device surface on the device surface does not overlap with a projection of the first device on the device surface, and the pole tab is connected to at least a portion of the bending section.

2. The battery according to claim 1, characterized in that The bending section comprises a first bending section, a second bending section and a third bending section connected in sequence; the connecting section is connected to the first bending section; The protection plate comprises a first side surface and a second side surface opposite to each other in the width direction, and a welding surface opposite to the device surface in the thickness direction; The connecting section is connected to the welding surface, the first bending section is located outside the first side surface, the second bending section is located outside the device surface, and the third bending section is located outside the second side surface.

3. The battery according to claim 1 or 2, characterized in that: A second device is also arranged on the device surface, and the distance between the second device and the device surface is a third height, and the third height is smaller than the second height; the projection of the part of the bending section located outside the device surface on the device surface at least partially overlaps with the projection of the second device on the device surface.

4. The battery according to claim 2, characterized in that The pole lug comprises a first pole lug segment and a second pole lug segment connected to each other; The first pole lug segment is connected to the third bending segment, and the second pole lug segment is connected to the second bending segment.

5. The battery according to claim 4, characterized in that The first pole lug segment is arranged on a side of the third bending segment facing the second side surface; The second pole tab segment is arranged on a side of the second bending segment facing the device surface.

6. The battery according to claim 1, characterized in that The battery also includes: A top seal, the top seal being arranged at an end of the battery cell, the top seal being bent toward the end and extending along the width direction of the protection plate, the pole lug extending from the top seal, and the top seal being located between the protection plate and the end; An adhesive layer is arranged between the top sealing edge and the protection plate.

7. The battery according to claim 6, characterized in that In the width direction of the battery core, side sealing edges are provided on both sides of the battery core; The junction of the top sealing edge and the side sealing edge forms a packaging foot; the protection plate is located between the two packaging feet.

8. The battery according to claim 7, characterized in that There are multiple battery cells, and the multiple battery cells are arranged side by side along the width direction of the battery cells; the protection plate is located between the two outermost packaging pins of two adjacent battery cells.

9. The battery according to claim 8, characterized in that The protection plate is provided with an avoidance opening, and the two packaging pins of two adjacent battery cells that are close to each other can pass through the avoidance opening.

10. The battery according to claim 3, characterized in that The battery also includes: A protective body is arranged at the end of the battery cell, and the protective body wraps the pole ear, the protection plate, the connecting piece, the first component and the second component.

11. A terminal device, characterized in that: It comprises a battery compartment and a battery as described in any one of claims 1 to 10, wherein the battery is installed in the battery compartment.

Images