Battery and vehicle

Abstract

The application relates to a battery and a vehicle, the battery comprising a cover plate, a shell and two electrodes, the shell being arranged on one side of the cover plate along a first direction and defining a containing cavity for containing a battery cell with the cover plate, the shell comprising a side shell and a stop portion, the stop portion protruding from the side shell along a radial direction of the shell and a direction of a center of the containing cavity along a circumferential side of the containing cavity to limit the battery cell along the first direction, and the two electrodes being arranged at two ends of the shell along the first direction and being electrically connected to the battery cell respectively. The installation strength of the battery cell of the battery is better, and the risk of displacement and failure of the battery cell caused by vibration can be effectively reduced.

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] In recent years, with the rapid development of the new energy vehicle industry, the market demand for lithium batteries has also experienced explosive growth. As the sole power source for new energy vehicles, the performance and reliability of lithium batteries largely determine the overall performance of these vehicles. Therefore, improving the performance and reliability of lithium batteries has become a key factor driving the progress of the new energy vehicle industry.

[0003] In related technologies, the battery cells inside the battery are prone to displacement due to vibrations caused by vehicle movement, leading to cell failure. Utility Model Content

[0004] Therefore, it is necessary to provide a battery and vehicle to address the problem that the internal cells of batteries in related technologies are prone to displacement and cell failure due to vibrations during vehicle operation.

[0005] According to one aspect of this application, a battery is provided, the battery comprising:

[0006] Cover plate;

[0007] The housing is disposed on one side of the cover plate along the first direction, and defines a receiving cavity for accommodating the battery cell between the housing and the cover plate;

[0008] The housing includes a side shell and a stop portion. Along the radial direction of the housing and in a direction pointing towards the center from the periphery of the receiving cavity, the stop portion protrudes from the side shell to limit the cell's position along the first direction; and

[0009] 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.

[0010] In one embodiment, the stop portion includes a stop surface that faces the battery cell along the first direction.

[0011] In one embodiment, the stop portion further includes a first reinforcing surface and a second reinforcing surface, the first reinforcing surface being away from the stop surface, the second reinforcing surface being connected between the stop surface and the first reinforcing surface, and the cover plate including a third reinforcing surface and a fourth reinforcing surface connected to each other, the third reinforcing surface facing the first reinforcing surface, and the fourth reinforcing surface facing the second reinforcing surface.

[0012] In one embodiment, the battery further includes a first pad disposed between the stop portion and the cell, the stop surface abutting against the first pad.

[0013] In one embodiment, the housing further defines a receiving space, the receiving space being disposed on one side of the receiving cavity along a first direction and communicating with the receiving cavity, the first pad being disposed within the receiving space extending along the first direction;

[0014] The cover plate 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 electrode of the two electrodes passes through the first through hole and is partially located within the accommodating space.

[0015] In one embodiment, the housing further includes a stepped portion connected to the stop portion and located on the side of the stop portion away from the battery cell along the first direction; the stepped portion includes a vertical portion and a horizontal portion, the vertical portion and the horizontal portion being respectively connected to the cover plate.

[0016] In one embodiment, the cover plate includes a fifth reinforcing surface and a sixth reinforcing surface connected to each other, the fifth reinforcing surface and the sixth reinforcing surface being at a predetermined angle, the vertical portion being connected to the fifth reinforcing surface, and the horizontal portion being connected to the sixth reinforcing surface.

[0017] In one embodiment, the vertical portion defines a receiving space located within the receiving cavity; the cover plate is provided with a first through hole extending along the first direction, the first through hole connecting the receiving space and the external environment, and the first electrode of the two electrodes passes through the first through hole and is partially located within the receiving space.

[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, and the bottom shell having a second through hole communicating between the receiving cavity and the external environment, the second through hole being for the passage of a second electrode of the two electrodes; or

[0019] 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. The bottom plate includes a bent portion, which includes a first abutting surface and a second abutting surface that intersect each other. The first abutting surface faces and is connected to the inner side of the side shell, and the second abutting surface faces and is connected to the side of the side shell facing away from the cover plate along the first direction. Or

[0020] 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.

[0021] According to another aspect of this application, a vehicle is provided that includes the battery in any of the above embodiments.

[0022] The aforementioned battery, through a casing design, incorporates a stop portion that protrudes radially from the side shell of the casing. This effectively limits the position of the battery cells, thereby improving the installation strength of the cells and achieving a stable and precise fit. This reduces the risk of internal cell displacement due to battery vibration during vehicle operation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the battery structure in one embodiment of this application.

[0024] Figure 2 This is a cross-sectional view of a battery in one embodiment of this application.

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0026] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0027] Figure 5 This is a cross-sectional view of a battery in one embodiment of this application, where the casing includes a stepped portion.

[0028] Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0029] Figure 7 for Figure 6 Enlarged view of point D in the middle.

[0030] Figure 8 for Figure 2 Enlarged view of point E in the middle.

[0031] Figure 9 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.

[0032] Figure 10 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.

[0033] Explanation of icon numbers:

[0034] 10. Battery;

[0035] 1. Shell; 12. Stop; 121. Stop surface; 122. First reinforcing surface; 123. Second reinforcing surface; 13. Side shell; 14. Bottom shell; 15. Vertical part; 16. Horizontal part;

[0036] 2. Cover plate; 21. Third reinforcing surface; 22. Fourth reinforcing surface; 23. Fifth reinforcing surface; 24. Sixth reinforcing surface; 25. First through hole; 26. Injection hole; 27. First explosion-proof plate; 28. Second explosion-proof plate; 29. ​​Third abutment surface;

[0037] 31. First electrode; 32. Second electrode;

[0038] 4. Base plate; 41. First abutment surface; 42. Second abutment surface;

[0039] 51. First insulating component; 52. Second insulating component; 53. Third insulating component; 54. Fourth insulating component; 55. Fifth insulating component;

[0040] 61. First busbar connector; 62. Second busbar connector; 71. First limiting component; 72. Second limiting component; 81. First gasket; 82. Second gasket; 91. Stretch adhesive; 92. Battery cell;

[0041] F1, First Direction. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] Cylindrical batteries are a common type of lithium battery. They store electrical energy, acquire power through charging, and discharge to provide power as needed. They offer advantages such as rapid charging and discharging, high charging efficiency, and high output power. However, existing cylindrical battery cells lack length-direction restraint. During use, vibrations can strain the electrode 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.

[0049] Based on this, this application provides a battery with better cell installation strength, which can effectively reduce the risk of cell displacement and failure caused by vibration.

[0050] See Figure 1 , Figure 2 and 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 This is a cross-sectional view of the battery 10 in one embodiment of this application. Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0051] The battery 10 provided in this application includes a cover plate 2, a housing 1 and two electrodes. The housing 1 is disposed on one side of the cover plate 2 along the first direction F1, and defines a receiving cavity for accommodating the battery cell 92 between the housing 1 and the cover plate 2.

[0052] The housing 1 includes a side shell 13 and a stop portion 12. Along the radial direction of the housing 1 and in a direction pointing towards the center from the periphery of the receiving cavity, the stop portion 12 protrudes from the side shell 13 to limit the movement of the battery cell 92 in the first direction F1. Thus, the stopping action of the stop portion 12 effectively prevents displacement of the battery cell 92 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.

[0053] Two electrodes are respectively located at both ends of the housing 1 along the first direction F1, and the two electrodes are electrically connected to the battery cell 92. The two electrodes enable the battery cell 92 to be electrically connected to the external circuit, thereby realizing the normal charging and discharging function of the battery 10.

[0054] The battery 10 of this application designs its housing 1 such that the stop portion 12 of the housing 1 protrudes radially from the side shell 13 of the housing 1, thereby limiting the position of the battery cell 92. This improves the installation strength of the battery cell 92 and achieves a stable and precise fit and positioning of the battery cell 92. It also reduces the risk of displacement of the internal battery cell 92 due to vibration of the battery 10 during vehicle operation.

[0055] In some embodiments, in conjunction with reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, Figure 4 for Figure 3 Enlarged view at point B. The stop portion 12 includes a stop surface 121, which faces the battery cell 92 along the first direction F1. The stop surface 121 can be a planar structure or a curved surface structure, without much restriction here. Compared with other structures, the planar structure of the stop surface 121 can provide a larger limiting area for the battery cell 92, which is beneficial to improving the stability of supporting and limiting the battery cell 92.

[0056] In some embodiments, the cover plate 2 further includes a body portion, and a stop portion 12 is arranged around the radial circumference of the body portion 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.

[0057] In some embodiments, continue reading Figure 3 and Figure 4 As shown, the stop portion 12 also includes a first reinforcing surface 122 and a second reinforcing surface 123. The first reinforcing surface 122 faces away from the stop surface 121, and the second reinforcing surface 123 connects the stop surface 121 and the first reinforcing surface 122. The cover plate 2 includes a third reinforcing surface 21 and a fourth reinforcing surface 22 connected to each other. The third reinforcing surface 21 faces the first reinforcing surface 122, and the fourth reinforcing surface 22 faces the second reinforcing surface 123. Thus, the multi-faceted connection design improves the connection strength and sealing performance between the cover plate 2 and the housing 1, ensuring the stability of the internal environment of the battery 10 and reducing the impact of external factors on the performance of the battery 10. Simultaneously, it also helps to improve the limiting effect on the battery cell 92.

[0058] In some embodiments, see Figure 3 and Figure 4 As shown, the battery 10 also includes a first pad 81, which is disposed between the stop portion 12 and the cell 92, with the stop surface 121 abutting against the first pad 81. The first pad 81 can buffer the stress between the cell 92 and the stop portion 12, reduce damage to the cell 92 caused by vibration, and provide better electrical insulation performance, thereby improving the safety of the battery 10.

[0059] In some embodiments, see Figure 3 and Figure 4As shown, the housing 1 further defines an accommodating space, which is located on one side of the receiving cavity along the first direction F1 and communicates with the receiving cavity. The first pad 81 extends along the first direction F1 and is disposed within the accommodating space. This embodiment facilitates the design of the first pad 81 to have a longer radial dimension, which helps to further buffer the stress between the battery cell 92 and the stop portion 12.

[0060] In some embodiments, see Figure 3 and Figure 4 As shown, the cover plate 2 has a first through hole 25 extending along the first direction F1. The first through hole 25 connects the accommodating space and the external environment. The first electrode 31 of the two electrodes passes through the first through hole 25 and is partially located within the accommodating space. This facilitates efficient use of space, improves the integration of the battery 10, and provides convenience for the installation and connection of the first electrode 31.

[0061] In some embodiments, in conjunction with reference Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, Figure 5 This is a cross-sectional view of a battery 10, including a stepped portion in the housing 1 of one embodiment of this application. Figure 6 for Figure 5 Enlarged view of point C in the middle. Figure 7 for Figure 6 Enlarged view of point D in the middle.

[0062] The housing 1 also includes a stepped portion connected to the stop portion 12 and located on the side of the stop portion 12 facing away from the cell 92 along the first direction F1. The stepped portion includes a vertical portion 15 and a horizontal portion 16, which are respectively connected to the cover plate 2. Thus, by connecting the cover plate 2 with two structural parts, the connection strength and sealing performance between the cover plate 2 and the housing 1 can be improved, ensuring the stability of the internal environment of the battery 10 and reducing the impact of external factors on the performance of the battery 10. Simultaneously, it also helps to improve the limiting effect on the cell 92.

[0063] In some embodiments, see Figure 6 and Figure 7 The cover plate 2 includes a fifth reinforcing surface 23 and a sixth reinforcing surface 24 that are connected to each other. The fifth reinforcing surface 23 and the sixth reinforcing surface 24 are at a predetermined angle. The vertical part 15 is connected to the fifth reinforcing surface 23, and the horizontal part 16 is connected to the sixth reinforcing surface 24. In this way, the design of multiple reinforcing surfaces helps to further improve the connection strength between the cover plate 2 and the housing 1, thereby helping to improve the limiting effect on the battery cell 92.

[0064] In some embodiments, such as Figure 6The vertical portion 15 defines a receiving space located within the receiving cavity. The cover plate 2 has a first through hole 25 extending along the first direction F1, which connects the receiving space to the external environment. The first electrode 31 of the two electrodes passes through the first through hole 25 and is partially located within the receiving space. It can be understood that the receiving space in this embodiment is defined by the vertical portion 15, and the side of the vertical portion 15 facing the cell 92 is also provided with a stop portion 12. That is to say, the space for receiving the first electrode 31 and the space for limiting the cell 92 do not interfere with each other. There is no need to set a pad with a long dimension along the first direction F1 for flexible limiting. Instead, the limiting is achieved by the stop portion 12, which has high limiting strength and helps to further reduce the risk of displacement of the cell 92 in a oscillating environment.

[0065] It should be noted that in this embodiment, as... Figure 5 and Figure 6 The accommodating space is defined by the vertical part 15, and as Figure 2 and Figure 3 In the embodiment shown, the accommodating space is defined by the side shell 13.

[0066] Furthermore, it can be understood that the arrangement of the accommodating space keeps the cover plate 2 away from the battery cell 92, thereby keeping 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, thus reducing the risk of accidentally damaging the battery cell 92 when laser welding the first limiting member 71 and the first electrode 31.

[0067] In some embodiments, see Figure 6 As shown, the battery also includes a second pad 82, which is disposed between the stop portion and the battery cell to buffer the stress between the battery cell 92 and the stop portion 12, reduce damage to the battery cell 92 caused by vibration, and provide better electrical insulation performance to improve the safety of the battery 10.

[0068] In some embodiments, in conjunction with reference Figure 3 and Figure 6 As shown, the battery 10 also 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.

[0069] 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.

[0070] In some embodiments, in conjunction with reference Figure 3 and Figure 6 As shown, the battery 10 also includes a first limiting member 71. A portion of the first electrode 31 extends beyond the cover plate 2. The first limiting member 71 is located on the portion of the first electrode 31 extending beyond the cover plate 2 and blocks the cover plate 2, thereby limiting the first electrode 31 to the first through hole 25 of the cover plate 2. The design of the first limiting member 71 prevents the first electrode 31 from shifting during use, ensuring a stable connection between the first electrode 31 and the external circuit, and improving the reliability of the battery 10.

[0071] In this embodiment, the first limiting member 71 can be made of metal to facilitate its shaping and better block the first through hole 25 of 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.

[0072] In some embodiments, the battery 10 further includes a first insulating member 51, which is disposed between the body portion and the first electrode 31, and a portion of the first insulating member 51 covers the side of the body portion 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.

[0073] In some embodiments, in conjunction with reference Figure 3 and Figure 6 As shown, the battery 10 also includes a third insulating member 53. A portion of the third insulating member 53 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.

[0074] 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.

[0075] In some embodiments, in conjunction with reference Figure 3 and Figure 6As shown, the battery 10 also 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 it from loosening during use and improving its stability. Furthermore, the wrapping adhesive 91 is located within the accommodating space, which facilitates further improvement in the integration of the battery 10.

[0076] In some embodiments, see Figure 3 and Figure 6 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.

[0077] The liquid injected into the battery 10 can be an electrolyte, which will not be elaborated on here.

[0078] In some embodiments, continue reading Figure 3 and Figure 6 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.

[0079] 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.

[0080] 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.

[0081] In some embodiments, in conjunction with reference Figure 2 and Figure 8 As shown, Figure 8 for Figure 2Enlarged view at point E. 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.

[0082] 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.

[0083] In this embodiment, see Figure 8 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.

[0084] 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.

[0085] In some embodiments, see Figure 9 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 a 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. It can be understood that the third through hole in this embodiment is provided on the bottom plate 4.

[0086] The base plate 4 includes a bent portion, which includes a first abutment surface 41 and a second abutment surface 42 that intersect each other. The first abutment surface 41 faces and is connected to the inner side surface of the side shell 13, and the second abutment surface 42 faces and is connected to a third abutment 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.

[0087] 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.

[0088] In this embodiment, as Figure 9 The second explosion-proof hole can be installed along the first direction F1 on the base plate 4. 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, the 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.

[0089] In this embodiment, as Figure 9 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 can prevent 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.

[0090] 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.

[0091] 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.

[0092] In some embodiments, see Figure 8 or Figure 9 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.

[0093] 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.

[0094] 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.

[0095] In some embodiments, see Figure 10 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.

[0096] 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.

[0097] In some embodiments, see Figure 8 or Figure 10 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.

[0098] 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.

[0099] The battery 10 and vehicle of this application utilize structural designs such as the stop part 12, cover plate 2, and shell 1 to provide multi-dimensional stable contact and precise positioning of the battery cell 92. The stop part 12 protrudes inward from the side shell 13, effectively preventing displacement of the battery cell 92 in the length direction, improving the installation strength of the battery cell 92, reducing the risk of battery cell 92 failure during vehicle operation or vibration, and enhancing the reliability of the battery 10. Furthermore, the internal structure of the battery 10 is rationally designed, with ample space for compact layout of components such as busbar connectors and insulating parts, improving the integration of the battery 10 and optimizing space utilization. Multi-layer insulation design (such as the first insulating part 51, the second insulating part 52, the third insulating part 53, the fourth insulating part 54, and the fifth insulating part 55) effectively prevents electrical contact between the electrodes and the shell 1 or base plate 4, ensuring the electrical insulation performance of the battery 10. The design of the explosion-proof hole and explosion-proof plate allows for timely pressure release 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.

[0100] 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.

[0101] 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: Cover plate; The housing is disposed on one side of the cover plate along the first direction, and defines a receiving cavity for accommodating the battery cell between the housing and the cover plate; The housing includes a side shell and a stop portion. Along the radial direction of the housing and in a direction pointing towards the center from the periphery of the receiving cavity, the stop portion protrudes from the side shell to limit the cell's position along the first direction; 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 stop portion includes a stop surface, which faces the battery cell along the first direction.

3. The battery according to claim 2, characterized in that, The stop portion further includes a first reinforcing surface and a second reinforcing surface. The first reinforcing surface is away from the stop surface, and the second reinforcing surface is connected between the stop surface and the first reinforcing surface. The cover plate includes a third reinforcing surface and a fourth reinforcing surface connected to each other. The third reinforcing surface faces the first reinforcing surface, and the fourth reinforcing surface faces the second reinforcing surface.

4. The battery according to claim 2, characterized in that, The battery further includes a first pad, which is disposed between the stop portion and the cell, and the stop surface abuts against the first pad.

5. The battery according to claim 4, characterized in that, The housing further defines a receiving space, which is located on one side of the receiving cavity along the first direction and communicates with the receiving cavity, and the first pad extends along the first direction and is located within the receiving space; The cover plate 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 electrode of the two electrodes passes through the first through hole and is partially located within the accommodating space.

6. The battery according to claim 2, characterized in that, The housing further includes a stepped portion, which is connected to the stop portion and located on the side of the stop portion away from the battery cell along the first direction; the stepped portion includes a vertical portion and a horizontal portion, which are respectively connected to the cover plate.

7. The battery according to claim 6, characterized in that, The cover plate includes a fifth reinforcing surface and a sixth reinforcing surface that are connected to each other, and the fifth reinforcing surface and the sixth reinforcing surface are at a preset angle. The vertical part is connected to the fifth reinforcing surface, and the horizontal part is connected to the sixth reinforcing surface.

8. The battery according to claim 6, characterized in that, The vertical portion defines an accommodating space located within the receiving cavity; the cover plate is provided with a first through hole extending along the first direction, the first through hole connecting the accommodating space and the external environment, and the first electrode of the two electrodes passes through the first through hole and is partially located within the accommodating space.

9. The battery according to any one of claims 2-8, 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, and is used for the second electrode of the two electrodes to pass through; or 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. The bottom plate includes a bent portion, which includes a first abutting surface and a second abutting surface that intersect each other. The first abutting surface faces and is connected to the inner side of the side shell, and the second abutting surface faces and is connected to the side of the side shell facing away from the cover plate along the first direction. Or 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.

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

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