Battery and vehicle

Abstract

The application relates to a battery and a vehicle, the battery comprising a shell, a cover plate and two electrodes, the shell defining a containing cavity for containing an electric core, the cover plate being arranged on one side of the shell along a first direction, the cover plate comprising a body part and an abutting part, the abutting part being arranged on the side of the body part close to the shell along the first direction, one end of the abutting part along the first direction abutting the electric core and being used for limiting the electric core, and the two electrodes being arranged on the two ends of the shell along the first direction respectively and being electrically connected to the electric core. The battery of the application strengthens the abutting and limiting of the electric core through the abutting part of the cover plate, improves the installation strength of the electric core of the battery, realizes the stable abutting and accurate limiting of the electric core, and reduces the risk of displacement of the internal electric core caused by vibration of the battery.

Description

Technical Field

[0001] This application relates to the field of battery module technology, and in particular to a battery and a vehicle. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the market demand for battery quality is gradually increasing. The installation of battery cells in related technologies is relatively weak, especially when the vehicle is in motion. Battery vibration can easily cause the cells inside the battery to shift, ultimately leading to cell failure. Utility Model Content

[0003] Therefore, it is necessary to address the problem that the installation of battery cells in related technologies is relatively weak, especially when the vehicle is in motion, the battery vibration can easily cause the cells inside the battery to shift, ultimately leading to cell failure, and to provide a battery and vehicle.

[0004] According to one aspect of this application, a battery is provided, the battery comprising:

[0005] The housing defines a receiving cavity for accommodating the battery cell;

[0006] A cover plate, disposed on one side of the housing along a first direction, the cover plate including a body portion and an abutment portion, the abutment portion being disposed on the side of the body portion along the first direction near the housing, the end of the abutment portion along the first direction facing the housing abutting against the battery cell and serving to limit the battery cell; and

[0007] Two electrodes are respectively disposed at both ends of the housing along the first direction, and the two electrodes are respectively electrically connected to the battery cell.

[0008] In one embodiment, the abutment portion is arranged around the radial periphery of the body portion along a direction perpendicular to the first direction.

[0009] In one embodiment, the cover plate further includes a stepped portion located on the side of the abutment portion away from the body portion, and the stepped portion is connected to the housing.

[0010] In one embodiment, the stepped portion includes a first connecting surface, the abutting portion includes a second connecting surface intersecting the first connecting surface, and the housing includes a third connecting surface and an inner surface that are connected to each other. The third connecting surface faces and is connected to the first connecting surface along the first direction, and the inner surface faces the receiving cavity and is partially connected to the second connecting surface.

[0011] In one embodiment, the cover plate further includes a connecting portion connected between the body portion and the abutting portion, the connecting portion extending along the first direction, and the connecting portion and the abutting portion defining an accommodating space communicating with the receiving cavity, wherein a portion of the first electrode of the two electrodes is located within the accommodating space.

[0012] In one embodiment, the body portion is provided with a first through hole extending along the first direction, the first through hole communicating between the accommodating space and the external environment, the first through hole being used for the first electrode to pass through;

[0013] The battery further includes a first insulating member disposed between the body portion and the first electrode, and a portion of the first insulating member covers the side of the body portion facing the cell.

[0014] In one embodiment, the housing includes a side shell and a bottom shell, the bottom shell being disposed on the side of the side shell away from the cover plate along a first direction, and the bottom shell having a second through hole communicating between the receiving cavity and the external environment, the second through hole being used for the second electrode of the two electrodes to pass through;

[0015] The battery also includes a second insulating element disposed between the housing and the second electrode.

[0016] In one embodiment, the housing includes a side shell, and the battery further includes a bottom plate. The bottom plate and the cover plate are disposed at opposite ends of the side shell along the first direction. A third through hole is provided on the bottom plate, which communicates between the receiving cavity and the external environment. The third through hole is used for the second electrode of the two electrodes to pass through.

[0017] The base plate includes a bent portion, which includes a fourth connecting surface and a fifth connecting surface that intersect each other. The fourth connecting surface faces and is connected to the inner side surface of the side shell, and the fifth connecting surface faces and is connected to a sixth connecting surface of the side shell that is away from the cover plate along the first direction.

[0018] In one embodiment, the housing includes a side shell and a bottom shell, the bottom shell being disposed on the side of the side shell away from the cover plate along a first direction, the side of the bottom shell facing the receiving cavity abutting the battery cell to serve as the second electrode of the two electrodes; the housing is made of aluminum or steel, and the other of the two electrodes is the first electrode, the first electrode being made of copper or nickel.

[0019] According to another aspect of this application, a vehicle is provided that includes the battery in any of the above embodiments.

[0020] The aforementioned battery strengthens the contact and positioning of the battery cells through the abutment portion of the cover, improving the installation strength of the battery cells and achieving a stable and precise contact and positioning of the cells. This reduces the risk of internal cell displacement due to battery vibration during vehicle operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the battery structure in one embodiment of this application.

[0022] Figure 2 for Figure 1 A cross-sectional view of the battery in the illustrated embodiment.

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0024] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0025] Figure 5 This is a cross-sectional view of the internal structure of a battery casing with a base plate at the end away from the cover plate in one embodiment of this application.

[0026] Figure 6 This is a cross-sectional view of the internal structure of the battery casing away from the cover plate in one embodiment of this application.

[0027] Explanation of icon numbers:

[0028] 10. Battery;

[0029] 1. Shell; 11. Third connecting surface; 12. Inner surface; 13. Side shell; 14. Bottom shell;

[0030] 2. Cover plate; 21. Body part; 22. Abutting part; 23. First connecting surface; 24. Second connecting surface; 25. Connecting part; 26. Injection hole; 27. First explosion-proof plate; 28. Second explosion-proof plate; 29. ​​Sixth connecting surface;

[0031] 31. First electrode; 32. Second electrode;

[0032] 4. Base plate; 41. Fourth connecting surface; 42. Fifth connecting surface;

[0033] 51. First insulating component; 52. Second insulating component; 53. Third insulating component; 54. Fourth insulating component; 55. Fifth insulating component;

[0034] 61. First busbar connector; 62. Second busbar connector; 71. First limiting component; 72. Second limiting component; 8. Gasket; 91. Stretch adhesive; 92. Battery cell;

[0035] F1, First Direction. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] In recent years, with the rapid development of the new energy vehicle industry, the market demand for lithium batteries has also shown a rapid growth trend. As the only power source for new energy vehicles, the performance and reliability of lithium batteries will largely determine the performance of new energy vehicles.

[0043] Cylindrical batteries are a common type of lithium battery. They store electrical energy, acquire power through charging, and provide power to the target device through discharging, depending on the application. They can be rapidly charged and discharged, offering advantages such as high charging efficiency and high output power. However, existing cylindrical battery cells lack length-direction restraint. During use, vibrations can pull on the tabs and welded joints, easily leading to cell failure. For example, under extreme vibrations, the cells in some related technologies can shift along their length, causing tears at the welded joints, resulting in a break in the positive and negative terminals and cell failure.

[0044] Based on this, this application provides a battery with better cell installation strength, which helps to improve the stable contact and precise positioning of the cell, and can effectively reduce the risk of cell displacement and failure caused by vibration.

[0045] See Figure 1 and Figure 2 Combined with reference Figure 3 As shown, Figure 1 This is a schematic diagram of the structure of the battery 10 in one embodiment of this application. Figure 2 for Figure 1A cross-sectional view of the battery 10 in the illustrated embodiment. Figure 3 for Figure 2 Enlarged view at point A. Battery 10 includes a housing 1, a cover plate 2, and two electrodes. The housing 1 defines a receiving cavity for accommodating the battery cell 92.

[0046] A cover plate 2 is disposed on one side of the housing 1 along the first direction F1. The cover plate 2 includes a body portion 21 and an abutment portion 22. The abutment portion 22 is disposed on the side of the body portion 21 along the first direction F1 near the housing 1. The end of the abutment portion 22 facing the housing 1 along the first direction F1 abuts against the battery cell 92 and is used to limit the position of the battery cell 92. This effectively prevents the battery cell 92 from displacing in the length direction or in the first direction F1, thereby improving the installation stability of the battery cell 92 and reducing the risk of battery cell 92 failure due to vibration.

[0047] Two electrodes are respectively located at both ends of the casing 1 along the first direction F1, and the two electrodes are electrically connected to the battery cell 92. Thus, the battery cell 92 and the external circuit can be electrically connected through the two electrodes, realizing the normal charging and discharging function of the battery 10.

[0048] The battery 10 of this application strengthens the contact and limiting of the battery cell 92 through the abutment portion 22 of the cover plate 2, thereby improving the installation strength of the battery cell 92 and achieving a stable contact and precise limiting of the battery cell 92. This reduces the risk of displacement of the internal battery cell 92 due to vibration of the battery 10 during vehicle operation, thus significantly improving the reliability and safety of the battery 10 during vehicle operation.

[0049] In some embodiments, such as Figure 2 and Figure 3 The abutment portion 22 is arranged around the radial periphery of the body portion 21 along the direction perpendicular to the first direction F1. This allows for more uniform positioning of the battery cell 92, ensuring the stability of the battery cell 92 in all directions and further reducing the risk of displacement of the battery cell 92 during vibration.

[0050] In some embodiments, see Figure 3 As shown, the battery 10 also includes a pad 8, which is disposed between the cell 92 and the contact portion 22. The pad 8 can buffer the stress between the cell 92 and the contact portion 22, reduce damage to the cell 92 caused by vibration, and provide better electrical insulation performance, thereby improving the safety of the battery 10.

[0051] In some embodiments, such as Figure 3 As shown, the cover plate 2 also includes a stepped portion, which is located on the side of the abutment portion 22 away from the main body portion 21, and is connected to the housing 1. The design of the stepped portion can enhance the connection strength between the cover plate 2 and the housing 1, ensure the stability of the cover plate 2 during the use of the battery 10, and prevent the cell 92 from shifting due to the loosening of the cover plate 2.

[0052] In some embodiments, continue reading Figure 3 As shown, the stepped portion includes a first connecting surface 23, the abutting portion 22 includes a second connecting surface 24 intersecting the first connecting surface 23, and the housing 1 includes a third connecting surface 11 and an inner surface 12 connected to each other. The third connecting surface 11 faces and connects to the first connecting surface 23 along a first direction F1, and the inner surface 12 faces the receiving cavity and is partially connected to the second connecting surface 24. This multi-faceted connection design can improve the connection strength and sealing performance between the cover plate 2 and the housing 1, ensure the stability of the internal environment of the battery 10, and reduce the impact of external factors on the performance of the battery 10.

[0053] In some embodiments, continue reading Figure 3 As shown, the cover plate 2 also includes a connecting portion 25, which connects the body portion 21 and the abutment portion 22. The connecting portion 25 extends along a first direction F1, and the connecting portion 25 and the abutment portion 22 define an accommodating space communicating with the receiving cavity. A portion of the first electrode 31 of the two electrodes is located within the accommodating space. This design can effectively utilize space, improve the integration of the battery 10, and at the same time provide convenience for the installation and connection of the first electrode 31.

[0054] It is understandable that the connection part 25 is set so that the main body part 21 is away from the battery cell 92, thereby making the first limiting member 71 away from the battery cell 92. The first limiting member 71 and the first electrode 31 can be laser welded together, so this can reduce the risk of accidentally damaging the battery cell 92 when laser welding the first limiting member 71 and the first electrode 31.

[0055] In some embodiments, the battery 10 further includes a first bus connector 61, which is connected between the first electrode 31 and the cell 92 and is located within the accommodating space to realize the electrical connection between the first electrode 31 and the cell 92. The first bus connector 61 can effectively reduce the contact resistance between the first electrode 31 and the cell 92, improve the charging and discharging efficiency of the battery 10, and ensure the reliability of the electrical connection.

[0056] The first bus connector 61 can be made of the same material as the first electrode 31, such as copper or nickel, which will not be elaborated further here. The first bus connector 61 is located within the accommodating space, which helps to further improve the integration of the battery 10.

[0057] In some embodiments, the battery 10 further includes a first limiting member 71. A portion of the first electrode 31 extends out of the cover plate 2. The first limiting member 71 is disposed on the portion of the first electrode 31 extending out of the cover plate 2 and blocks the cover plate 2 to limit the first electrode 31 to the first through hole of the cover plate 2. The design of the first limiting member 71 can prevent the first electrode 31 from shifting during use, ensure a stable connection between the first electrode 31 and the external circuit, and improve the reliability of the battery 10.

[0058] In this embodiment, the first limiting member 71 can be made of metal to facilitate its shaping and better block the first through hole in the cover plate 2. Furthermore, the first limiting member 71 can be made of the same metal as the first electrode 31, such as copper or nickel, to improve the conductivity at the first electrode 31.

[0059] In some embodiments, the battery 10 further includes a third insulating member 53, a portion of which is disposed between the first limiting member 71 and the cover plate 2, providing insulation to them. This effectively prevents electrical contact between the first limiting member 71 and the cover plate 2, ensuring the electrical insulation performance of the battery 10 and improving its safety. Furthermore, the third insulating member 53 is located within the accommodating space, which facilitates further improvement in the integration of the battery 10.

[0060] In this embodiment, a snap-fit ​​groove is defined between the first insulating member 51 and the cover plate 2, and a portion of the third insulating member 53 snaps into the snap-fit ​​groove, thereby improving the connection strength between the first insulating member 51, the third insulating member 53, and the cover plate 2. This snap-fit ​​design can enhance the connection stability between the components, prevent the components from loosening due to vibration, and ensure the long-term reliability of the battery 10.

[0061] In some embodiments, the battery 10 further includes a wrapping adhesive 91, which is bonded to both ends of the cell 92 along the first direction F1 to enhance the structural strength of the cell 92. The wrapping adhesive 91 can be polyester tape or polyimide tape, etc., which will not be elaborated further here. The wrapping adhesive 91 effectively fixes the structure of the cell 92, preventing the cell 92 from loosening during use and improving the stability of the cell 92. Furthermore, the wrapping adhesive 91 is located within the accommodating space, which facilitates further improvement in the integration of the battery 10.

[0062] In some embodiments, continue reading Figure 3As shown, the main body 21 has a first through hole extending along a first direction F1, which connects the accommodating space and the external environment. The first through hole allows the first electrode 31 of the two electrodes to pass through. The battery 10 also includes a first insulating member 51, which is disposed between the main body 21 and the first electrode 31, and a portion of the first insulating member 51 covers the side of the main body 21 facing the cell 92. The insulating member effectively prevents electrical contact between the first electrode 31 and the cover plate 2, ensuring the electrical insulation performance of the battery 10 and improving the safety of the battery 10.

[0063] In some embodiments, see Figure 3 As shown, the cover plate 2 is also provided with an injection hole 26 extending along the first direction F1 through the cover plate 2. The injection hole 26 connects the receiving cavity and the external environment and is used to inject liquid into the receiving cavity. The injection hole 26 includes an upper end hole and a lower end hole that are connected to each other along the first direction F1. The lower end hole is located on the side closer to the receiving cavity, and the diameter of the upper end hole is larger than that of the lower end hole. The battery 10 also includes a hole baffle. After the liquid injection is completed, the hole baffle can be placed at the upper end hole. The design of the injection hole 26 can ensure the smooth injection of electrolyte, while the hole baffle prevents electrolyte leakage and ensures the sealing performance of the battery 10.

[0064] The liquid injected into the battery 10 can be an electrolyte, which will not be elaborated on here.

[0065] In some embodiments, continue reading Figure 3 The cover plate 2 is also provided with a first explosion-proof hole extending along the first direction F1 through the cover plate 2. The first explosion-proof hole connects the receiving cavity and the external environment. The battery 10 also includes a first explosion-proof plate 27, which is plugged at the first explosion-proof hole. The design of the first explosion-proof hole and the first explosion-proof plate 27 can release pressure in time when the internal pressure of the battery 10 rises abnormally, preventing the battery 10 from exploding and significantly improving the safety of the battery 10.

[0066] The first explosion-proof sheet 27 can be one of the following: microporous polytetrafluoroethylene (PTFE) film, composite film, aluminum alloy explosion-proof sheet, and pure aluminum explosion-proof sheet, which will not be elaborated on here.

[0067] In some embodiments, the housing 1 and the cover can be connected by laser welding to provide a high-strength sealed connection, ensuring the airtightness and waterproof performance of the battery 10 and extending the service life of the battery 10.

[0068] In some embodiments, in conjunction with reference Figure 1 and Figure 4As shown, the housing 1 includes a side shell 13 and a bottom shell 14. The bottom shell 14 is located on the side of the side shell 13 away from the cover plate 2 along the first direction F1, and a second through hole is provided on the bottom shell 14. The second through hole connects the receiving cavity and the external environment. The second through hole is used for the second electrode 32 of the two electrodes to pass through.

[0069] The battery 10 also includes a second insulating member 52, which is disposed between the housing 1 and the second electrode 32. The second insulating member 52 serves as an insulator, effectively preventing electrical contact between the second limiting member 72 and the bottom shell 14, and effectively preventing partial electrical contact between the second electrode 32 and the bottom shell 14, thus ensuring the electrical insulation performance of the battery 10 and improving its safety.

[0070] In this embodiment, see Figure 4 In the embodiment shown, the battery 10 further includes a second limiting member 72. A portion of the second electrode 32 extends outside the bottom shell 14. The second limiting member 72 is disposed on the portion of the second electrode 32 extending outside the bottom shell 14 and blocks the bottom shell 14 to limit the second electrode 32 to the second through hole of the bottom shell 14. The design of the second limiting member 72 prevents the second electrode 32 from shifting during use, ensuring a stable connection between the second electrode 32 and the external circuit, and improving the reliability of the battery 10.

[0071] In this embodiment, the second limiting member 72 can be made of metal to facilitate its shaping and better block the second through hole in the bottom shell 14. Furthermore, the second limiting member 72 can be made of the same metal as the second electrode 32, such as aluminum, to improve the conductivity at the second electrode 32.

[0072] In some embodiments, see Figure 5 As shown, the housing 1 includes a side shell 13, and the battery 10 also includes a bottom plate 4. The bottom plate 4 and the cover plate 2 are disposed at opposite ends of the side shell 13 along the first direction F1. A third through hole is provided on the bottom plate 4, which connects the receiving cavity and the external environment. The third through hole is used for the second electrode 32 of the two electrodes to pass through.

[0073] The base plate 4 includes a bent portion, which includes a fourth connecting surface 41 and a fifth connecting surface 42 that intersect each other. The fourth connecting surface 41 faces and is connected to the inner surface 12 of the side shell 13, and the fifth connecting surface 42 faces and is connected to the sixth connecting surface 29 of the side shell 13 that is away from the cover plate 2 along the first direction F1. This helps to improve the connection strength and sealing performance between the cover plate 2 and the shell 1, ensure the stability of the internal environment of the battery 10, and reduce the impact of external factors on the performance of the battery 10.

[0074] In this embodiment, the length-to-diameter ratio of the battery 10 is greater than or equal to 2 and less than or equal to 6. The length-to-diameter ratio is the ratio of height to diameter, and the battery 10 has relatively uniform dimensions.

[0075] In this embodiment, the second explosion-proof hole can be installed on the base plate 4 along the first direction F1. The second explosion-proof hole connects the receiving cavity and the external environment. The battery 10 also includes a second explosion-proof plate 28, which is installed at the second explosion-proof hole. In this way, pressure can be released in time when the internal pressure of the battery 10 rises abnormally, preventing the battery 10 from exploding and significantly improving the safety of the battery 10.

[0076] In this embodiment, a portion of the second electrode 32 extends beyond the base plate 4. A second limiting member 72 is disposed on the portion of the second electrode 32 extending beyond the base plate 4 and blocks the base plate 4 to limit the second electrode 32 to the third through hole of the base plate 4. The design of the second limiting member 72 prevents the second electrode 32 from shifting during use, ensuring a stable connection between the second electrode 32 and the external circuit, and improving the reliability of the battery 10. In this embodiment, the second limiting member 72 can also be made of metal, which has the advantages of easy plasticity and improved conductivity at the second electrode 32, and will not be elaborated further.

[0077] In this embodiment, the battery 10 also includes a fourth insulating member 54 and a fifth insulating member 55. A portion of the fourth insulating member 54 is disposed between the second limiting member 72 and the bottom plate 4, serving as an insulating element. A portion of the fifth insulating member 55 is disposed within the receiving cavity and is disposed between a portion of the second electrode 32 and the bottom shell 14, serving as an insulating element. Further details will not be provided.

[0078] In this embodiment, a limiting groove is defined between the fifth insulating member 55 and the base plate 4, and a portion of the fourth insulating member 54 is engaged within the limiting groove, thereby improving the connection strength between the fourth insulating member 54, the fifth insulating member 55, and the base plate 4. This engaging design enhances the connection stability between the components, prevents loosening of components due to vibration, and ensures the long-term reliability of the battery 10.

[0079] In some embodiments, see Figure 4 or Figure 5 In the embodiment shown, the battery 10 further includes a second bus connector 62. The first bus connector 61 is connected between the second electrode 32 and the cell 92 and is located within the accommodating space to realize the electrical connection between the second electrode 32 and the cell 92. The second bus connector 62 can effectively reduce the contact resistance between the second electrode 32 and the cell 92, improve the charging and discharging efficiency of the battery 10, and ensure the reliability of the electrical connection.

[0080] The material of the second bus connector 62 can be the same as that of the second electrode 32, such as aluminum, which will not be elaborated further here. The second bus connector 62 is located within the accommodating space, which helps to further improve the integration of the battery 10.

[0081] It should be noted that the bus connectors 61 and 62 of this application are bent plate-shaped structures. While realizing the electrical connection between the corresponding electrodes and the battery cell 92, their plate-shaped structures can also provide support for the battery cell 92.

[0082] In some embodiments, see Figure 6 As shown, the housing 1 includes a side shell 13 and a bottom shell 14. The bottom shell 14 is located on the side of the side shell 13 away from the cover plate 2 along the first direction F1. The side of the bottom shell 14 facing the receiving cavity abuts against the battery cell 92 and serves as the second electrode 32 of the two electrodes. The housing 1 is made of aluminum or steel. The other electrode of the two electrodes is the first electrode 31, which is made of copper or nickel. In this way, the bottom shell 14 not only serves as a structural support but also directly participates in the electrochemical reaction of the battery 10 as the second electrode 32. The aspect ratio of the battery 10 is greater than or equal to 1.5 and less than or equal to 2.5. The aspect ratio is the ratio of height to diameter. This simplifies the internal structural design of the battery 10, reduces the number of parts, and thus lowers production costs.

[0083] In this embodiment, a current collector is provided between the battery cell 92 and the bottom shell 14. The current collector collects current from the battery cell 92, and the bottom shell 14 is directly welded to the current collector.

[0084] In some embodiments, see Figure 4 or Figure 6 In the embodiment shown, the bottom shell 14 is provided with a second explosion-proof hole, which extends through the bottom shell 14 along the first direction F1 and connects the receiving cavity to the external environment. The battery 10 also includes a second explosion-proof plate 28, which is plugged at the second explosion-proof hole. The design of the first explosion-proof hole and the first explosion-proof plate 27 can release pressure in a timely manner when the internal pressure of the battery 10 abnormally increases, preventing the battery 10 from exploding and significantly improving the safety of the battery 10.

[0085] This application also provides a vehicle including the battery 10 in any of the above embodiments. It enables stable contact and precise positioning of the battery cell 92, thereby reducing the risk of displacement of the internal battery cell 92 due to vibration of the battery 10 during vehicle operation, and thus significantly improving the reliability and safety of the battery 10 during vehicle operation.

[0086] The battery 10 and vehicle of this application have better structural stability. The contact portion 22 of the cover plate 2 strengthens the contact and limiting of the battery cell 92, improving the installation strength of the battery cell 92 and achieving a stable contact and precise limiting of the battery cell 92, reducing the risk of displacement of the internal battery cell 92 due to vibration of the battery 10. The multi-layer insulation design (such as the first insulating element 51, the second insulating element 52, the fourth insulating element 54, and the fifth insulating element 55) effectively prevents electrical contact between the electrodes and the casing 1 or the base plate 4, ensuring the electrical insulation performance of the battery 10 and improving the safety of the battery 10. The design of the explosion-proof hole and explosion-proof plate can release pressure in time when the internal pressure of the battery 10 rises abnormally, preventing the battery 10 from exploding and significantly improving the safety of the battery 10. The bus connectors (such as the first bus connector 61 and the second bus connector 62) can effectively reduce the contact resistance between the electrodes and the battery cell 92, improve the charging and discharging efficiency of the battery 10, and ensure the reliability of the electrical connection. The rational internal structural design (such as the storage space and vias) improves the integration of the battery 10, optimizes space utilization, and makes the battery 10 more compact, suitable for various application scenarios.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery, characterized in that, The battery includes: The housing defines a receiving cavity for accommodating the battery cell; A cover plate, disposed on one side of the housing along a first direction, the cover plate including a body portion and an abutment portion, the abutment portion being disposed on the side of the body portion along the first direction near the housing, the end of the abutment portion along the first direction facing the housing abutting against the battery cell and serving to limit the battery cell; and Two electrodes are respectively disposed at both ends of the housing along the first direction, and the two electrodes are respectively electrically connected to the battery cell.

2. The battery according to claim 1, characterized in that, The abutting portion is arranged around the radial periphery of the body portion along a direction perpendicular to the first direction.

3. The battery according to claim 1, characterized in that, The cover plate also includes a stepped portion, which is located on the side of the abutment portion away from the main body portion, and the stepped portion is connected to the housing.

4. The battery according to claim 3, characterized in that, The stepped portion includes a first connecting surface, the abutting portion includes a second connecting surface intersecting the first connecting surface, and the housing includes a third connecting surface and an inner surface that are connected to each other. The third connecting surface faces and is connected to the first connecting surface along the first direction, and the inner surface faces the receiving cavity and is partially connected to the second connecting surface.

5. The battery according to claim 1, characterized in that, The cover plate further includes a connecting portion, which connects the body portion and the abutting portion. The connecting portion extends along the first direction, and the connecting portion and the abutting portion define an accommodating space communicating with the receiving cavity. A portion of the first electrode of the two electrodes is located within the accommodating space.

6. The battery according to claim 5, characterized in that, The main body is provided with a first through hole extending along the first direction. The first through hole connects the accommodating space and the external environment. The first through hole is used for the first electrode to pass through. The battery further includes a first insulating member disposed between the body portion and the first electrode, and a portion of the first insulating member covers the side of the body portion facing the cell.

7. The battery according to any one of claims 1-6, characterized in that, The housing includes a side shell and a bottom shell. The bottom shell is located on the side of the side shell away from the cover plate along a first direction, and a second through hole is provided on the bottom shell. The second through hole communicates between the receiving cavity and the external environment. The second through hole is used for the second electrode of the two electrodes to pass through. The battery also includes a second insulating element disposed between the housing and the second electrode.

8. The battery according to any one of claims 1-6, characterized in that, The housing includes a side shell, and the battery also includes a bottom plate. The bottom plate and the cover plate are disposed at opposite ends of the side shell along the first direction. A third through hole is provided on the bottom plate, which communicates between the receiving cavity and the external environment. The third through hole is used for the second electrode of the two electrodes to pass through. The base plate includes a bent portion, which includes a fourth connecting surface and a fifth connecting surface that intersect each other. The fourth connecting surface faces and is connected to the inner side surface of the side shell, and the fifth connecting surface faces and is connected to a sixth connecting surface of the side shell that is away from the cover plate along the first direction.

9. The battery according to any one of claims 1-6, characterized in that, The housing includes a side shell and a bottom shell. The bottom shell is located on the side of the side shell away from the cover plate along a first direction. The side of the bottom shell facing the receiving cavity abuts against the battery cell to serve as the second electrode of the two electrodes. The housing is made of aluminum or steel. The other of the two electrodes is the first electrode, which is made of copper or nickel.

10. A vehicle, characterized in that, Includes the battery as described in any one of claims 1 to 9.

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