Battery and battery pack

Abstract

The utility model discloses a battery and a battery pack. The battery comprises a shell, a battery cell, a top cover and an electrode, the shell is provided with a containing cavity, the battery cell is arranged in the containing cavity, the containing cavity is provided with a cavity opening, and the top cover is connected to the shell and covers the cavity opening; the electrode comprises a connecting part and a first leading-out part, the connecting part is arranged between the top cover and the battery cell, a tab is arranged at one end, facing the top cover, of the battery cell, the connecting part is electrically connected to the tab, one end of the first leading-out part is electrically connected with the connecting part, the first leading-out part penetrates through the top cover and is at least partially exposed out of the top cover, and the first leading-out part and the connecting part are both of a sheet-shaped structure; the first leading-out part is bent relative to the connecting part, and a first included angle A is formed between the connecting part and the first leading-out part and meets the condition that A is larger than 0 degree and smaller than 180 degrees. Therefore, the connection and fixation of the electrode and the tab are facilitated, the contact area of the connection part and the tab can be increased, the connection strength and the overcurrent capability between the electrode and the tab are improved, and in addition, the heat dissipation performance of the battery can be improved through the sheet-shaped first lead-out part.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery and a battery pack. Background Technology

[0002] Lithium-ion batteries, as a new type of rechargeable battery, have advantages such as high energy density and power density, high operating voltage, light weight, small size, good safety, and environmental friendliness, and are widely used in various fields. As the core component of a battery pack, the safety of the battery is of paramount importance.

[0003] In related technologies, batteries typically include a casing, a battery cell housed within the casing, and a top cover that seals the casing. Positive and negative tabs extend from the top of the battery cell, and positive and negative terminals are located in the top cover. The positive tab is welded to the positive terminal, and the negative tab is welded to the negative terminal, respectively, using metal connecting pieces. However, this battery structure requires welding metal connecting pieces to both the tabs and terminals, which is relatively cumbersome and detrimental to cell heat dissipation. Utility Model Content

[0004] This application aims to provide a battery and battery pack that can solve the problem in related technologies where the battery structure requires the use of metal connecting pieces to weld to the tabs and terminals respectively, which is relatively cumbersome and not conducive to heat dissipation of the battery cell.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application provide a battery, comprising: a casing, a cell, a top cover, and electrodes;

[0007] The housing has a receiving cavity, the battery cell is disposed in the receiving cavity, the receiving cavity has an opening, and the top cover is connected to the housing and seals the opening;

[0008] The electrode includes a connecting portion and a first lead-out portion. The connecting portion is disposed between the top cover and the battery cell. The battery cell has a tab at one end facing the top cover. The connecting portion is electrically connected to the tab. One end of the first lead-out portion is electrically connected to the connecting portion. The first lead-out portion passes through the top cover and is at least partially exposed outside the top cover. Both the first lead-out portion and the connecting portion are sheet-like structures. The first lead-out portion is bent relative to the connecting portion. The connecting portion and the first lead-out portion have a first included angle A, satisfying: 0° < A < 180°.

[0009] Optionally, the range of the first included angle A is 90°±10°.

[0010] Optionally, it also includes a first plastic component, which is disposed on the side of the top cover away from the battery cell, and the first plastic component at least partially covers the outer peripheral surface of the first lead-out portion.

[0011] Optionally, the first lead-out portion is provided with a first through hole, the first through hole penetrates the first lead-out portion along the thickness direction, the first through hole is exposed outside the top cover, and the first plastic part is partially embedded in the first through hole.

[0012] Optionally, the battery has a first direction, which is the thickness direction of the battery, and the first lead-out portion is provided with a plurality of first through holes, which are arranged at intervals along the first direction.

[0013] Optionally, the plurality of first through holes include a plurality of first sub-holes and a plurality of second sub-holes, wherein the diameter of the first sub-hole is larger than the diameter of the second sub-hole, and the plurality of first sub-holes and the plurality of second sub-holes are arranged at intervals along the first direction.

[0014] Optionally, it further includes a second plastic component, which is disposed on the side of the top cover facing the battery cell and located between the connecting portion and the top cover, with the first lead-out portion passing through the second plastic component.

[0015] Optionally, the connecting part is provided with a limiting hole, and the second plastic part is provided with a limiting boss on the side facing the connecting part, and the limiting boss is connected to the limiting hole.

[0016] Optionally, the electrode further includes a second lead-out portion connected to the end of the connecting portion away from the first lead-out portion. The second lead-out portion passes through the top cover and is bent relative to the connecting portion. The connecting portion and the second lead-out portion have a second included angle B, satisfying: 0° < B < 180°.

[0017] Optionally, the range of the second included angle B is 90°±10°.

[0018] Optionally, the battery has a second direction, which is the length direction of the battery, the connecting portion extends along the second direction, the first lead-out portion and the second lead-out portion are disposed at both ends of the connecting portion along the second direction, and there is a gap between the first lead-out portion and the second lead-out portion;

[0019] And / or, the battery has a third direction, which is the height direction of the battery, and along the third direction, the height of the second lead is less than or equal to the height of the first lead.

[0020] Optionally, it also includes a third plastic component, which is disposed on the side of the top cover away from the battery cell, and the third plastic component at least partially covers the outer peripheral surface of the second lead-out portion;

[0021] The third plastic part has a slot on the side away from the top cover, and the end of the second lead-out part away from the connecting part is bent in the direction away from the first lead-out part to form a bent section, and the bent section is at least partially engaged in the slot.

[0022] And / or, the second lead-out portion is provided with a plurality of second through holes, the plurality of second through holes being arranged at intervals, and the third plastic part being partially embedded in the second through holes.

[0023] Optionally, the battery further includes a first sealing element, the top cover has a first mounting hole, and the first lead-out portion passes through the first mounting hole; the first sealing element is at least partially disposed between the hole wall of the first mounting hole and the first lead-out portion, for sealing the gap between the first lead-out portion and the hole wall of the first mounting hole;

[0024] And / or, the battery further includes a second seal, the top cover having a second mounting hole, the second lead-out portion passing through the second mounting hole; the second seal is at least partially disposed between the hole wall of the second mounting hole and the second lead-out portion, for sealing the gap between the second lead-out portion and the hole wall of the second mounting hole.

[0025] Optionally, the connecting part and the first lead-out part are integrally formed parts;

[0026] Alternatively, the connecting part and the second lead-out part are integrally formed parts;

[0027] Alternatively, the connecting part, the first lead-out part, and the second lead-out part may be integrally formed.

[0028] Secondly, embodiments of this application provide a battery pack including the battery described in any of the first aspects above.

[0029] In the embodiments of this application, the electrode includes a connecting portion and a first lead-out portion. The electrode is connected to the tab on the battery cell through the connecting portion. The first lead-out portion passes through the top cover, with one end connected to the connecting portion and the other end usable for electrical connection with external components. Furthermore, both the first lead-out portion and the connecting portion are designed as sheet-like structures, and are bent relative to each other to form a first included angle A. This facilitates the connection and fixation of the connecting portion to the tab, increases the contact area between the connecting portion and the tab, thereby improving the connection strength and current carrying capacity between the electrode and the tab. Simultaneously, the angled arrangement between the first lead-out portion and the connecting portion facilitates the structural layout of the electrode in the battery. Moreover, by designing both the first lead-out portion and the connecting portion as sheet-like structures, the specific surface area of ​​the electrode is increased, facilitating rapid heat transfer and exchange generated inside the battery cell, thereby improving the battery's heat dissipation performance.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is a schematic diagram of a battery according to an embodiment of this application;

[0033] Figure 2 This is an exploded view of a battery according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the mating structure between the top cover and the electrode according to an embodiment of this application;

[0035] Figure 4 This is a partial schematic diagram of the mating structure of the top cover and the electrode according to an embodiment of this application;

[0036] Figure 5 This is a schematic diagram of a positive electrode according to an embodiment of this application;

[0037] Figure 6 This is a schematic diagram of a negative electrode according to an embodiment of this application;

[0038] Figure 7 This is a schematic diagram of another battery according to an embodiment of this application;

[0039] Figure 8 This is a schematic diagram of another positive electrode according to an embodiment of this application;

[0040] Figure 9 This is a schematic diagram of another negative electrode according to an embodiment of this application;

[0041] Figure 10 This is a schematic diagram of another battery according to an embodiment of this application;

[0042] Figure 11 This is a schematic diagram of another positive electrode according to an embodiment of this application;

[0043] Figure 12 This is a schematic diagram of another negative electrode according to an embodiment of this application.

[0044] Figure label:

[0045] 1: Battery; 10: Housing; 101: Receiving cavity; 20: Battery cell; 201: Tab; 30: Top cover; 301: First mounting hole; 302: Second mounting hole; 40: Electrode; 41: Connecting part; 411: Limiting hole; 412: Copper sheet; 42: First lead-out part; 421: First through hole; 421a: First sub-hole; 421b: Second sub-hole; 43: Second lead-out part; 43a: Bending section; 433: Second through hole; 51: First plastic part; 52: Second plastic part; 521: Limiting boss; 53: Third plastic part; 531: Slot; 541: First seal; 542: Second seal; 55: Insulating sheet; X: First direction; Y: Second direction; Z: Third direction. Detailed Implementation

[0046] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0047] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0048] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] The battery and battery pack provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0051] like Figures 1 to 4 As shown, according to some embodiments of this application, the battery 1 includes: a housing 10, a battery cell 20, a top cover 30, and an electrode 40; the housing 10 has a receiving cavity 101, the battery cell 20 is disposed in the receiving cavity 101, the receiving cavity 101 has an opening, and the top cover 30 is connected to the housing 10 and seals the opening; the electrode 40 includes a connecting portion 41 and a first lead-out portion 42, the connecting portion 41 is disposed between the top cover 30 and the battery cell 20, the end of the battery cell 20 facing the top cover 30 has a tab 201, the connecting portion 41 is electrically connected to the tab 201, one end of the first lead-out portion 42 is electrically connected to the connecting portion 41, the first lead-out portion 42 passes through the top cover 30 and is at least partially exposed outside the top cover 30, the first lead-out portion 42 and the connecting portion 41 are both sheet-like structures, and the first lead-out portion 42 is bent relative to the connecting portion 41, and there is a first included angle A between the connecting portion 41 and the first lead-out portion 42, satisfying: 0° < A < 180°.

[0052] In the embodiments of this application, the electrode 40 includes a connecting portion 41 and a first lead-out portion 42. The electrode 40 is connected to the tab 201 on the battery cell 20 via the connecting portion 41. The first lead-out portion 42 passes through the top cover 30. One end of the first lead-out portion 42 is connected to the connecting portion 41, and the other end can be used for electrical connection with external components. Furthermore, both the first lead-out portion 42 and the connecting portion 41 are designed as sheet-like structures, and the first lead-out portion 42 and the connecting portion 41 are bent relative to each other to form a first included angle A. This facilitates the connection and fixation of the connecting portion 41 and the tab 201, and also increases the contact area between the connecting portion 41 and the tab 201, thereby improving the connection strength and current carrying capacity between the electrode 40 and the tab 201. Meanwhile, the first lead-out portion 42 and the connecting portion 41 are set at an angle, which facilitates the structural layout of the electrode 40 in the battery 1, reduces the space occupied by the electrode 40, and by setting both the first lead-out portion 42 and the connecting portion 41 as sheet structures, the specific surface area of ​​the electrode 40 can be increased, so as to facilitate the rapid transfer and heat exchange of the heat generated by the cell 20 inside the battery 1 to the outside, thereby improving the heat dissipation performance of the battery 1.

[0053] It should be noted that in this application, the connecting portion 41 and the first lead-out portion 42 are arranged at a first included angle A, meaning that the plane containing the sheet-like connecting portion 41 is not parallel to the plane containing the sheet-like first lead-out portion 42. The first included angle A can be any angle or a range between any two angles, such as 10°, 30°, 45°, 60°, 90°, 135°, 145°, 160°, or 175°.

[0054] It is understood that the top cover 30 of the battery 1 in this application can be provided with two electrodes 40, namely a positive electrode and a negative electrode. The end of the cell 20 facing the top cover 30 is provided with a positive electrode tab and a negative electrode tab, which are spaced apart. The positive electrode is electrically connected to the positive electrode tab of the cell 20, and the negative electrode is electrically connected to the negative electrode tab of the cell 20. The structures of the positive and negative electrodes can be the same or similar to facilitate actual processing and installation. The following embodiment will use the structure corresponding to one electrode as an example for explanation; the structure of the other electrode can be implemented by reference and will not be repeated here.

[0055] In some embodiments, the positive and negative electrodes provided in the top cover 30 can be made of the same or different materials. For example, they can both be made of conductive materials such as copper and aluminum.

[0056] For example, such as Figure 5 and Figure 6 As shown, both the positive electrode 40 and the negative electrode 40 can be made of aluminum busbars to reduce production costs while meeting the conductivity requirements of the electrodes 40. Furthermore, as... Figure 6As shown, a copper sheet 412 is embedded in the connection part 41 of the negative electrode 40. The copper sheet 412 is located on the side of the connection part 41 facing the battery cell 20, so that the negative electrode tab on the battery cell 20 is welded to the copper sheet 412. This helps to improve the service life of the negative electrode.

[0057] Optionally, such as Figure 4 As shown, the range of the first included angle A is 90°±10°. For example, the first included angle A can be set to any angle or a range between any two angles, such as 80°, 83°, 85°, 90°, 92°, 95°, 98°, 100°.

[0058] In this embodiment of the application, by setting the first included angle A to 90°±10°, when the first lead-out portion 42 passes through the top cover 30, the connecting portion 41 can occupy a smaller internal space of the battery 1, which helps to improve the energy density of the battery 1.

[0059] Optionally, such as Figures 1 to 4 As shown, the battery 1 also includes a first plastic component 51, which is disposed on the side of the top cover 30 away from the cell 20, and the first plastic component 51 at least partially covers the outer peripheral surface of the first lead-out portion 42.

[0060] In this embodiment of the application, a first plastic part 51 is provided on the side of the top cover 30 away from the battery cell 20, and the first plastic part 51 is at least partially covered on the outer peripheral surface of the first lead-out portion 42, so as to connect and fix the first lead-out portion 42 and the top cover 30 by means of the first plastic part 51.

[0061] The first plastic part 51 can be prepared by injection molding. The first plastic part 51 can be made of insulating material or conductive material. The specific material of the first plastic part 51 can be flexibly set according to the actual application scenario.

[0062] For example, such as Figure 1 As shown, the top cover 30 is provided with two electrodes 40, namely a positive electrode and a negative electrode, which are arranged alternately. The positive electrode is electrically connected to the positive electrode tab of the battery cell 20, and the negative electrode is electrically connected to the negative electrode tab of the battery cell 20. Furthermore, a first plastic part 51 is provided on the top cover 30 at the corresponding positions of the positive electrode and the negative electrode.

[0063] The first plastic component 51 corresponding to the positive electrode can be made of either an insulating or conductive material. The first plastic component 51 corresponding to the negative electrode can be made of an insulating material. Thus, by using first plastic components 51 made of different materials for the positive and negative electrodes, different performance requirements can be met.

[0064] Optionally, such as Figures 4 to 6As shown, the first lead-out portion 42 is provided with a first through hole 421, which penetrates the first lead-out portion 42 along the thickness direction. The first through hole 421 is exposed outside the top cover 30, and the first plastic part 51 is partially embedded in the first through hole 421.

[0065] In this embodiment of the application, by providing a through hole 421 in the first lead-out portion 42, when the first plastic part 51 is processed and molded, the first plastic part 51 is partially embedded in the first through hole 421, thereby improving the bonding strength between the first plastic part 51 and the first lead-out portion 42.

[0066] Optionally, such as Figure 5 and Figure 6 As shown, the battery 1 has a first direction X, which is the thickness direction of the battery 1. The first lead-out portion 42 is provided with a plurality of first through holes 421, which are arranged at intervals along the first direction X.

[0067] In this embodiment of the application, by providing a plurality of first through holes 421 arranged at intervals along the first direction X in the first lead-out portion 42, and embedding a portion of the first plastic part 51 in each first through hole 421, the contact area between the first plastic part 51 and the first lead-out portion 42 can be increased, thereby improving the connection strength between the first plastic part 51 and the first lead-out portion 42.

[0068] Furthermore, by providing multiple first through holes 421 in the first lead-out portion 42, the current-carrying capacity of the electrode 40 at the corresponding position of the first through hole 421 changes abruptly. When the cell 20 is short-circuited, the electrode 40 portion between the first through holes 421 is prone to instantaneous high temperature, which causes the corresponding position of the electrode 40 to melt. In this way, an open circuit can be formed between the cells 20, thereby protecting the high-voltage circuit of the battery 1.

[0069] The size and shape of the multiple first through holes 421 can be the same or different. The first through holes 421 can be round, square, elliptical, or oblong. The specific shape and size of the first through holes 421 can be flexibly set according to actual needs and are not limited here.

[0070] In some embodiments, such as Figure 5 and Figure 6As shown, the plurality of first through holes 421 include a plurality of first sub-holes 421a and a plurality of second sub-holes 421b. The diameter of the first sub-hole 421a is larger than the diameter of the second sub-hole 421b, and the plurality of first sub-holes 421a and the plurality of second sub-holes 421b are arranged alternately along the first direction X. In this way, the structural strength of the electrode 40 can be guaranteed, so that the first plastic part 51 can be embedded in the first through hole 421 to connect and fix the first lead-out portion 42. At the same time, when a short circuit occurs in the cell 20, due to the arrangement of the first sub-holes 421a and the second sub-holes 421b, the overcurrent capacity of local positions in the first lead-out portion 42 is different, which makes it easier to generate local instantaneous high temperature, thereby causing the corresponding part of the electrode 40 to melt quickly, which can protect the battery 1.

[0071] Optionally, such as Figures 2 to 4 As shown, the battery 1 also includes a second plastic component 52, which is disposed on the side of the top cover 30 facing the cell 20 and located between the connecting part 41 and the top cover 30. The first lead-out part 42 passes through the second plastic component 52.

[0072] In this embodiment, by providing a second plastic part 52 on the side of the top cover 30 facing the cell 20, and having the first lead 42 pass through the second plastic part 52, the second plastic part 52 can be used to fix the electrode 40; at the same time, the second plastic part 52 is located between the connecting part 41 and the top cover 30, so that the second plastic part 52 can serve as an insulating barrier between the connecting part 41 and the top cover 30.

[0073] In specific applications, the second plastic part 52 can be made of insulating materials, such as insulating rubber, insulating plastic, etc., to ensure the insulating performance of the second plastic part 52.

[0074] Optionally, such as Figure 4 As shown, the connecting part 41 is provided with a limiting hole 411, and the second plastic part 52 is provided with a limiting boss 521 on the side facing the connecting part 41. The limiting boss 521 is connected to the limiting hole 411.

[0075] In this embodiment of the application, by providing a limiting hole 411 in the connecting part 41 and a limiting boss 521 on the side of the second plastic part 52 facing the connecting part 41, the limiting boss 521 extends at least partially into the limiting hole 411, so as to play a limiting role between the second plastic part 52 and the connecting part 41, and also facilitate the installation and positioning between the second plastic part 52 and the electrode 40 during the assembly process.

[0076] Optionally, such as Figures 1 to 5As shown, electrode 40 also includes a second lead-out portion 43, which is connected to the end of connecting portion 41 away from the first lead-out portion 42. The second lead-out portion 43 passes through the top cover 30 and is bent relative to connecting portion 41. There is a second included angle B between connecting portion 41 and second lead-out portion 43, which satisfies: 0° < B < 180°.

[0077] In this embodiment, the electrode 40 further includes a second lead-out portion 43, which is connected to the end of the connecting portion 41 away from the first lead-out portion 42. The second lead-out portion 43 passes through the top cover 30. By providing the second lead-out portion 43, the heat dissipation area of ​​the electrode 40 can be increased, improving the heat dissipation performance of the battery 1. Simultaneously, the second lead-out portion 43 and the connecting portion 41 are bent relative to each other to form a second included angle B, thus facilitating a reasonable layout of the second lead-out portion 43 within the top cover 30.

[0078] The second lead-out portion 43 can also be configured as a sheet structure to increase the specific surface area of ​​the electrode 40, thereby improving the thermal conductivity of the electrode 40 and increasing the heat dissipation efficiency of the cell 20.

[0079] Optionally, such as Figure 4 As shown, the range of the second included angle B is 90°±10°. For example, the second included angle B can be set to any angle or a range between any two angles, such as 80°, 83°, 85°, 90°, 92°, 95°, 98°, 100°.

[0080] In this embodiment, by setting the range of the second included angle B to 90°±10°, the electrode 40 is better adapted to the internal space of the battery 1, thereby satisfying the connection requirements of the connection part 41 and the tab 201, and facilitating the connection and fixation of the second lead-out part 43 in the top cover 30, thus avoiding the need for the electrode 40 to occupy more internal space of the battery 1.

[0081] It should be noted that the angles of the first included angle A and the second included angle B can be the same or different. Preferably, both the first included angle A and the second included angle B are set to 90°. This improves the overall structural regularity of the electrode 40 and facilitates its processing, assembly, and use.

[0082] Optionally, such as Figure 1 and Figure 4 As shown, the battery 1 has a second direction Y, which is the width direction of the battery 1. The connecting part 41 extends along the second direction Y. The first lead-out part 42 and the second lead-out part 43 are respectively disposed at both ends of the connecting part 41 along the second direction Y. There is a gap between the first lead-out part 42 and the second lead-out part 43.

[0083] It is understood that the top cover 30 is elongated, and its length direction is consistent with the length direction of the battery 1, i.e., the second direction Y. Therefore, in this application, the extension direction of the connecting portion 41 is aligned with the length direction of the top cover 30 to ensure that the connecting portion 41 has sufficient dimensions for connecting the tab 201, thereby improving the connection strength and current carrying capacity between the connecting portion 41 and the tab 201. Simultaneously, the first lead-out portion 42 and the second lead-out portion 43 are respectively disposed at both ends of the connecting portion 41 along its extension direction, and a gap is maintained between the first lead-out portion 42 and the second lead-out portion 43 to facilitate rapid heat dissipation, thereby improving the heat dissipation capacity of the electrode 40.

[0084] Optionally, such as Figures 7 to 9 As shown, battery 1 has a third direction Z, which is the height direction of battery 1. Along the third direction Z, the height of the second lead 43 is less than or equal to the height of the first lead 42.

[0085] In this embodiment, by providing two leads in the electrode 40, and making the height of the second lead 43 less than or equal to the height of the first lead 42, the relatively higher first lead 42 is used to make electrical connections with external components to meet the connection requirements of the battery 1. Simultaneously, by providing a relatively lower second lead 43, the influence of the second lead 43 on the connection operation of the first lead 42 is reduced. Furthermore, the combined heat conduction of the first lead 42 and the second lead 43 improves heat dissipation for the battery cell 20.

[0086] Optionally, such as Figures 2 to 4 As shown, the battery 1 also includes a third plastic component 53, which is disposed on the side of the top cover 30 away from the cell 20, and the third plastic component 53 at least partially covers the outer peripheral surface of the second lead 43.

[0087] In this embodiment of the application, a third plastic part 53 is provided on the side of the top cover 30 away from the battery cell 20, and the third plastic part 53 is at least partially covered on the outer peripheral surface of the second lead 43, so as to connect and fix the second lead 43 and the top cover 30 by means of the third plastic part 53.

[0088] The material of the third plastic part 53 can be the same as that of the first plastic part 51 in the above embodiment, and will not be described again here.

[0089] Optionally, such as Figures 10 to 12 As shown, the third plastic part 53 has a slot 531 on the side away from the top cover 30, and the end of the second lead-out part 43 away from the connecting part 41 is bent in the direction away from the first lead-out part 42 to form a bent section 43a, and the bent section 43a is at least partially engaged in the slot 531.

[0090] In this embodiment, by providing a slot 531 in the third plastic part 53, the end of the second lead-out portion 43 away from the connecting portion 41 is bent, and the bent portion of the second lead-out portion 43 is engaged in the slot 531. This not only improves the fixing effect of the second lead-out portion 43, but also increases the heat dissipation area of ​​the second lead-out portion 43 by providing a bending structure, thereby improving the heat dissipation effect and reducing the space occupied by the second lead-out portion 43 in the third direction Z.

[0091] Optionally, such as Figure 4 and Figure 5 As shown, the second lead-out part 43 is provided with a plurality of second through holes 433, which are arranged at intervals, and the third plastic part 53 is partially embedded in the second through holes 433.

[0092] In this embodiment of the application, by providing a plurality of through holes 433 in the second lead-out portion 43, the third plastic part 53 is partially embedded in the second through holes 433, thereby increasing the bonding strength between the third plastic part 53 and the second lead-out portion 43 and enhancing the fixing effect on the second lead-out portion 43.

[0093] It is understood that the structure of the second through hole 433 in the second lead-out portion 43 can refer to the structure of the first through hole 421 in the first lead-out portion 42 in the aforementioned embodiment, and will not be described again here.

[0094] Optionally, such as Figure 4 As shown, the battery 1 also includes a first sealing member 541. The top cover 30 is provided with a first mounting hole 301, and the first lead-out portion 42 passes through the first mounting hole 301. The first sealing member 541 is at least partially disposed between the hole wall of the first mounting hole 301 and the first lead-out portion 42, and is used to seal the gap between the first lead-out portion 42 and the hole wall of the first mounting hole 301.

[0095] In this embodiment of the application, a first sealing member 541 is provided between the wall of the first mounting hole 301 and the first lead-out portion 42 to seal the gap between the first lead-out portion 42 and the wall of the first mounting hole 301, thereby improving the sealing performance of the electrode 40 and the top cover 30 at the first mounting hole 301.

[0096] Specifically, such as Figure 4 As shown, the first sealing member 541 includes a first sealing part and a second sealing part. The first sealing part is disposed between the hole wall of the first mounting hole 301 and the first lead-out part 42, and the first sealing part is arranged circumferentially around the first lead-out part 42 so as to seal the gap between the first lead-out part 42 and the hole wall of the first mounting hole 301.

[0097] Furthermore, the second sealing part is connected to the side of the first sealing part facing the connecting part 41, and the second sealing part extends radially along the first mounting hole 301 to the space between the top cover 30 and the second plastic part 52, thereby sealing the gap between the top cover 30 and the second plastic part 52 around the first mounting hole 301, thus improving the overall sealing performance of the top cover 30.

[0098] Optionally, such as Figure 4 As shown, the battery 1 also includes a second sealing member 542. The top cover 30 is provided with a second mounting hole 302, and the second lead-out portion 43 passes through the second mounting hole 302. The second sealing member 542 is at least partially disposed between the hole wall of the second mounting hole 302 and the second lead-out portion 43, and is used to seal the gap between the second lead-out portion 43 and the hole wall of the second mounting hole 302.

[0099] In this embodiment, a second sealing member 542 is provided between the wall of the second mounting hole 302 and the second lead-out portion 43 to seal the gap between the second lead-out portion 43 and the wall of the second mounting hole 302, thereby improving the sealing performance between the electrode 40 and the top cover 30 at the second mounting hole 302.

[0100] Specifically, the second sealing member 542 includes a third sealing part and a fourth sealing part. The third sealing part is disposed between the hole wall of the second mounting hole 302 and the second lead-out part 43, and the third sealing part is arranged around the second lead-out part 43 in the circumferential direction, so as to seal the gap between the second lead-out part 43 and the hole wall of the second mounting hole 302 by means of the third sealing part.

[0101] Furthermore, the fourth sealing part is connected to the side of the third sealing part facing the connecting part 41, and the fourth sealing part extends radially along the second mounting hole 302 to the space between the top cover 30 and the second plastic part 52, thereby sealing the gap between the top cover 30 and the second plastic part 52 around the second mounting hole 302, thus improving the overall sealing performance of the top cover 30.

[0102] In some embodiments, such as Figure 5 and Figure 6 As shown, the connecting part 41 and the first lead-out part 42 are integrally formed. By making the connecting part 41 and the first lead-out part 42 integrally formed, the connection strength between the connecting part 41 and the first lead-out part 42 is improved. The second lead-out part 43 can be separately formed from the connecting part 41 to allow for flexible configuration of the structure of the second lead-out part 43.

[0103] In some embodiments, such as Figure 5 and Figure 6As shown, the connecting part 41 and the second lead-out part 43 are integrally formed. By making the connecting part 41 and the second lead-out part 43 integrally formed, the connection strength between the connecting part 41 and the second lead-out part 43 is improved. However, the first lead-out part 42 and the connecting part 41 can be separately formed to allow for flexible configuration of the structure of the first lead-out part 42.

[0104] In some embodiments, such as Figure 5 and Figure 6 As shown, the connecting part 41, the first lead-out part 42, and the second lead-out part 43 are integrally formed. By making the connecting part 41, the first lead-out part 42, and the second lead-out part 43 integrally formed, the connection strength between the connecting part 41 and the first lead-out part 42 and the second lead-out part 43 is improved.

[0105] In other embodiments, such as Figure 2 As shown, the battery 1 also includes an insulating sheet 55, which is disposed on the side of the top cover 30 away from the cell 20. The first lead-out portion 42 and the second lead-out portion 43 are both inserted through the insulating sheet 55. The insulating sheet 55 has clearance holes at positions corresponding to the first plastic part 51 and the second plastic part 52. The first plastic part 51 and the second plastic part 52 are respectively inserted into the corresponding clearance holes so that the insulating sheet 55 can fit better with the top cover 30, thereby forming an insulating isolation effect on the upper surface of the top cover 30.

[0106] Optionally, this application embodiment also provides a battery pack, including the battery 1 in the above embodiment.

[0107] In the embodiments of this application, the electrode 40 includes a connecting portion 41 and a first lead-out portion 42. The electrode 40 is connected to the tab 201 on the battery cell 20 via the connecting portion 41. The first lead-out portion 42 passes through the top cover 30. One end of the first lead-out portion 42 is connected to the connecting portion 41, and the other end can be used for electrical connection with external components. Furthermore, both the first lead-out portion 42 and the connecting portion 41 are designed as sheet-like structures, and the first lead-out portion 42 and the connecting portion 41 are bent relative to each other to form a first included angle A. This facilitates the connection and fixation of the connecting portion 41 and the tab 201, and also increases the contact area between the connecting portion 41 and the tab 201, thereby improving the connection strength and current carrying capacity between the electrode 40 and the tab 201. Meanwhile, the first lead-out portion 42 and the connecting portion 41 are set at an angle, which facilitates the structural layout of the electrode 40 in the battery 1, reduces the space occupied by the electrode 40, and by setting both the first lead-out portion 42 and the connecting portion 41 as sheet structures, the specific surface area of ​​the electrode 40 can be increased, so as to facilitate the rapid transfer and heat exchange of the heat generated by the cell 20 inside the battery 1 to the outside, thereby improving the heat dissipation performance of the battery 1.

[0108] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0109] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery (1), characterized in that, include: The casing (10), the battery cell (20), the top cover (30), and the electrodes (40); The housing (10) is provided with a receiving cavity (101), the battery cell (20) is disposed in the receiving cavity (101), the receiving cavity (101) has an opening, and the top cover (30) is connected to the housing (10) and covers the opening; The electrode (40) includes a connecting part (41) and a first lead-out part (42). The connecting part (41) is disposed between the top cover (30) and the battery cell (20). The battery cell (20) has a tab (201) at one end facing the top cover (30). The connecting part (41) is electrically connected to the tab (201). One end of the first lead-out part (42) is electrically connected to the connecting part (41). The first lead-out part (42) passes through the top cover (30) and is at least partially exposed outside the top cover (30). Both the first lead-out part (42) and the connecting part (41) are sheet-like structures. The first lead-out part (42) is bent relative to the connecting part (41). The connecting part (41) and the first lead-out part (42) have a first included angle A, satisfying: 0° < A < 180°.

2. The battery (1) according to claim 1, characterized in that, The range of the first included angle A is 90°±10°.

3. The battery (1) according to claim 1, characterized in that, It also includes a first plastic part (51), which is disposed on the side of the top cover (30) away from the battery cell (20), and the first plastic part (51) at least partially covers the outer peripheral surface of the first lead-out portion (42).

4. The battery (1) according to claim 3, characterized in that, The first lead-out portion (42) is provided with a first through hole (421), the first through hole (421) penetrates the first lead-out portion (42) along the thickness direction, the first through hole (421) is exposed outside the top cover (30), and the first plastic part (51) is partially embedded in the first through hole (421).

5. The battery (1) according to claim 4, characterized in that, The battery (1) has a first direction (X), which is the thickness direction of the battery (1). The first lead-out portion (42) is provided with a plurality of first through holes (421), and the plurality of first through holes (421) are arranged at intervals along the first direction (X).

6. The battery (1) according to claim 5, characterized in that, The plurality of first through holes (421) include a plurality of first sub-holes (421a) and a plurality of second sub-holes (421b), wherein the diameter of the first sub-hole (421a) is larger than the diameter of the second sub-hole (421b), and the plurality of first sub-holes (421a) and the plurality of second sub-holes (421b) are arranged at intervals along the first direction (X).

7. The battery (1) according to claim 1, characterized in that, It also includes a second plastic part (52), which is disposed on the side of the top cover (30) facing the battery cell (20) and located between the connecting part (41) and the top cover (30), and the first lead-out part (42) passes through the second plastic part (52).

8. The battery (1) according to claim 7, characterized in that, The connecting part (41) is provided with a limiting hole (411), and the second plastic part (52) is provided with a limiting boss (521) on the side facing the connecting part (41), and the limiting boss (521) is connected to the limiting hole (411).

9. The battery (1) according to any one of claims 1-8, characterized in that, The electrode (40) further includes a second lead-out portion (43), which is connected to the end of the connecting portion (41) away from the first lead-out portion (42). The second lead-out portion (43) passes through the top cover (30). The second lead-out portion (43) is bent relative to the connecting portion (41), and there is a second included angle B between the connecting portion (41) and the second lead-out portion (43), satisfying: 0° < B < 180°.

10. The battery (1) according to claim 9, characterized in that, The battery (1) has a second direction (Y), which is the length direction of the battery (1). The connecting part (41) extends along the second direction (Y). The first lead-out part (42) and the second lead-out part (43) are respectively disposed at both ends of the connecting part (41) along the second direction (Y). There is a gap between the first lead-out part (42) and the second lead-out part (43). And / or, the battery (1) has a third direction (Z), which is the height direction of the battery (1), and along the third direction (Z), the height of the second lead (43) is less than or equal to the height of the first lead (42).

11. The battery (1) according to claim 9, characterized in that, It also includes a third plastic component (53), which is disposed on the side of the top cover (30) away from the battery cell (20), and the third plastic component (53) at least partially covers the outer peripheral surface of the second lead-out portion (43); The third plastic part (53) has a slot (531) on the side away from the top cover (30), and the second lead-out part (43) is bent in the direction away from the connecting part (41) to form a bent section (43a), and the bent section (43a) is at least partially engaged in the slot (531). And / or, the second lead-out portion (43) is provided with a plurality of second through holes (433), the plurality of second through holes (433) are arranged at intervals, and the third plastic part (53) is partially embedded in the second through holes (433).

12. The battery (1) according to claim 9, characterized in that, The battery (1) further includes a first sealing member (541), and the top cover (30) is provided with a first mounting hole (301), and the first lead-out portion (42) passes through the first mounting hole (301); the first sealing member (541) is at least partially disposed between the hole wall of the first mounting hole (301) and the first lead-out portion (42), for sealing the gap between the first lead-out portion (42) and the hole wall of the first mounting hole (301); And / or, the battery (1) further includes a second sealing member (542), the top cover (30) is provided with a second mounting hole (302), and the second lead-out portion (43) passes through the second mounting hole (302); the second sealing member (542) is at least partially disposed between the hole wall of the second mounting hole (302) and the second lead-out portion (43), for sealing the gap between the second lead-out portion (43) and the hole wall of the second mounting hole (302).

13. The battery (1) according to claim 9, characterized in that, The connecting part (41) and the first lead-out part (42) are integrally formed parts; Alternatively, the connecting part (41) and the second lead-out part (43) are integrally formed parts; Alternatively, the connecting part (41), the first lead-out part (42), and the second lead-out part (43) may be integrally formed.

14. A battery pack, characterized in that, Includes the battery (1) as described in any one of claims 1-13.

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