Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment, and relates to the technical field of batteries. The battery comprises a battery cell, a shell and a pole. The battery cell has a set thickness; the shell comprises a first side wall, a second side wall and a third side wall, the first side wall and the second side wall are arranged at intervals in the thickness direction of the battery cell, the third side wall is located between the first side wall and the second side wall and arranged in a surrounding mode, the first side wall, the second side wall and the third side wall jointly form a containing cavity, the battery cell is located in the containing cavity, and the third side wall comprises a mounting wall extending in the set direction; the set direction is perpendicular to the thickness direction of the battery cell, and the mounting wall is provided with a through mounting hole; the pole comprises a body, the body is of a cylinder structure, the body is arranged in the mounting hole in a penetrating mode and electrically connected to the battery cell, and the size of the body in the set direction is at least two times of the size of the body in the thickness direction of the battery cell. According to the battery and the electric equipment provided by the embodiment of the utility model, the connection strength between the pole and the battery core is higher, and the safety is higher.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to batteries and electrical equipment. Background Technology

[0002] In related technologies, steel-cased batteries achieve electrical connection between the cell and external devices through terminals, which include cylinders passing through the steel casing. When steel-cased batteries need to be further thinned, the diameter of the aforementioned cylindrical terminals also needs to be further reduced. Correspondingly, the axial end face of the cylinder is reduced, resulting in a decrease in the welding area between the tab and the terminal. This increases the risk of the terminal detaching from the tab, thus creating a safety hazard. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery that further enhances battery safety.

[0004] This utility model also proposes an electrical device having the above-mentioned battery.

[0005] The battery according to an embodiment of the present invention includes:

[0006] The battery cell has a set thickness;

[0007] The housing includes a first sidewall and a second sidewall spaced apart in the thickness direction of the battery cell, and a third sidewall located between the first sidewall and the second sidewall and surrounding the battery cell. The first sidewall, the second sidewall and the third sidewall together form a receiving cavity, and the battery cell is located in the receiving cavity. The third sidewall includes a mounting wall extending in a predetermined direction perpendicular to the thickness direction of the battery cell. The mounting wall has a through mounting hole.

[0008] The electrode post includes a body, which is a cylindrical structure. The body passes through the mounting hole and is electrically connected to the battery cell. The dimension of the body along the predetermined direction is at least twice the dimension of the body along the thickness direction of the battery cell. The battery according to this embodiment of the invention has at least the following beneficial effects: the electrical energy of the battery cell can be transmitted to external devices through the body passing through the mounting hole. The area of ​​the end face of the cylindrical body near the receiving cavity determines the size of the weldable area when welding to the electrode tab of the battery cell, thus determining the connection strength between the battery cell and the body. In this invention, the mounting wall extends along a predetermined direction, and this predetermined direction is perpendicular to the thickness direction of the battery cell. Therefore, the dimension of the body along the predetermined direction is at least twice the dimension of the body along the thickness direction of the battery cell. This allows for a larger dimension of the body in the direction perpendicular to its extension, even when the battery cell thickness is limited. The end face near the receiving cavity is also further enlarged, allowing for more solder joints for connection to the battery cell. This solution enhances the connection between the electrode post and the battery cell, thereby enhancing battery safety.

[0009] According to some embodiments of the present invention, the electrode post further includes a protrusion, the protrusion being connected to the body, the battery having a projection plane in the wall thickness direction of the mounting wall, the protrusion having a first projection in the projection plane, the body having a second projection in the projection plane, the second projection being located within the first projection, and the side of the protrusion near the mounting wall being connected to the edge of the mounting hole.

[0010] According to some embodiments of the present invention, the battery further includes hot melt adhesive, and the protrusion is connected to the edge of the mounting hole by the hot melt adhesive.

[0011] According to some embodiments of the present invention, the protrusion is located on the side of the mounting wall opposite to the receiving cavity.

[0012] According to some embodiments of the present invention, the protrusion is located on the side of the mounting wall near the receiving cavity.

[0013] According to some embodiments of the present invention, the battery further includes a sealing element disposed between the wall of the mounting hole and the body.

[0014] According to some embodiments of the present invention, the housing includes an upper plate, a middle frame, and a lower plate. The upper plate includes a first side wall, the middle frame includes a third side wall, and the lower plate includes a second side wall. The upper plate and the lower plate are respectively welded to different sides of the middle frame in the thickness direction of the battery cell. The upper plate, the middle frame, and the lower plate together form the receiving cavity. The middle frame includes the mounting wall.

[0015] According to some embodiments of the present invention, the battery cell further includes a tab, which is welded to the side of the body near the receiving cavity, and the solder joints formed by welding the tab and the body are arranged along the set direction.

[0016] According to some embodiments of the present invention, the battery further includes an insulating member attached to the side of the mounting wall near the receiving cavity and disposed around the body.

[0017] The electrical device according to the embodiments of the present invention includes a battery as described in any of the above embodiments.

[0018] The electrical equipment according to the embodiments of the present utility model has at least the following beneficial effects: the battery in any of the above embodiments can enhance the connection strength between the terminal and the cell by utilizing the space perpendicular to the cell thickness direction, thereby making the battery safer. The electrical equipment using the above battery is also safer, which is conducive to increasing the service life of the electrical equipment.

[0019] Additional aspects and advantages of this invention 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 the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is an overall schematic diagram of a battery according to some embodiments of the first aspect of this utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of a battery explosion;

[0023] Figure 3 for Figure 1 Exploded view of part of the battery structure;

[0024] Figure 4 This is an exploded schematic diagram of a battery according to some embodiments of the second aspect of this utility model;

[0025] Figure 5 for Figure 1 A cross-sectional view of part of the battery structure;

[0026] Figure 6 This is a cross-sectional view of a portion of the structure of a battery according to some embodiments of the third aspect of this utility model;

[0027] Figure 7 This is a cross-sectional view of a portion of the structure of a battery according to some embodiments of the fourth aspect of this utility model;

[0028] Figure 8 for Figure 1 A schematic diagram of the welding of the middle electrode lug to the body;

[0029] Figure 9 for Figure 8 A magnified view of a portion of point A in the middle.

[0030] Figure label:

[0031] Battery 10;

[0032] Battery cell 100, tabs 110;

[0033] Housing 200, receiving cavity 210, mounting wall 220, mounting hole 221, upper plate 230, first side wall 231, middle frame 240, third side wall 241, lower plate 250, second side wall 251, liquid injection hole 260, first shell part 270, second shell part 280;

[0034] 300 pole post, 310 body, 320 protrusion;

[0035] Hot melt adhesive 400;

[0036] Solder joint 500;

[0037] Insulating component 600;

[0038] Seal 700. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown 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 utility model, and should not be construed as limiting this utility model.

[0040] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0041] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0042] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0043] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. 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.

[0044] In existing technologies, steel-cased batteries are a packaging design that uses a steel casing to enclose the battery cells. The steel casing provides robust support for the internal cells, resulting in higher overall physical stability and significantly improved drop resistance and temperature resistance. To allow the internal cells to transfer electrical energy to external devices, current steel-cased battery designs connect the internal tabs to the terminals mounted on the steel casing via spot welding.

[0045] The size of the welding area determines the connection strength between the tab and the terminal. The connection strength between the terminal and the tab connected by spot welding depends on the number of weld points. For existing circular terminal designs, multiple weld points are arranged around the axis of the circular terminal. With the current trend of increasingly thinner batteries, the diameter of the circular terminal is gradually decreasing. The spacing between the weld points in the above arrangement will gradually decrease, eventually leading to overlapping weld point areas, a smaller welding area, a decrease in the connection strength between the tab and the terminal, and a decline in the overall safety performance of the battery.

[0046] In view of this, please refer to Figures 1 to 9 As shown, this utility model proposes a battery 10, including a cell 100, a casing 200, and terminals 300.

[0047] Please refer to Figure 1 , Figure 2As shown, the battery cell 100 of this invention has a set thickness (that is, the thickness direction of the battery cell 100 is parallel to the direction of the battery cell 100). Figure 1 , Figure 2 (As shown in the front-back direction). It should be noted that this utility model does not limit the type of battery cell 100; battery cell 100 can be a laminated battery cell, a wound battery cell, etc.

[0048] It should be noted that this utility model does not limit the shape of the battery cell 100 and the battery 10. The battery cell 100 of this utility model can be a conventional rectangle, or it can be an approximate "L" shape, "T" shape, etc. Shapes that are adjusted based on the above shapes by those skilled in the art should also fall within the protection scope of this utility model.

[0049] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, the housing 200 of this utility model includes components in the thickness direction of the battery cell 100 (i.e., Figure 1 , Figure 2 , Figure 3 , Figure 5 The battery cell 100 is located within the cavity 210, which is formed by a first sidewall 231 and a second sidewall 251 spaced apart in the front-back direction (as shown in the diagram), and a third sidewall 241 located between and surrounding the first sidewall 231 and the second sidewall 251. The third sidewall 241 includes a mounting wall 220 extending in a predetermined direction perpendicular to the thickness direction of the battery cell 100. The mounting wall 220 has a through mounting hole 221. The electrode post 300 includes a body 310, which is a cylindrical structure. The body 310 passes through the mounting hole 221 and is electrically connected to the battery cell 100. The dimension of the body 310 in the predetermined direction is at least twice the dimension of the body 310 in the thickness direction of the battery cell 100.

[0050] The battery cell 100 of this invention is housed in the receiving cavity 210. The casing 200, through its own structure, isolates the battery cell 100 from direct contact with external devices, thereby protecting the battery cell 100. The body 310 of the terminal post 300 has a cylindrical structure. The area of ​​the end face of the body 310 near the receiving cavity 210 determines the size of the weldable area when welding the body 310 to the tab 110 of the battery cell 100, and also determines the number of solder joints 500 when welding the terminal post 300 to the tab 110 of the battery cell 100. When welding the tab 110 of the battery cell 100 to the terminal post 300, welding the tab 110 of the battery cell 100 to the side of the body 310 near the receiving cavity 210 can prevent the body 310 from being welded through, thereby ensuring the structural strength of the body 310 and the stability of the battery 10. When the battery cell 100 is connected to the body 310, the electrical energy of the battery cell 100 can be transmitted to external devices through the body 310 because the body 310 passes through the mounting hole 221 of the housing 200.

[0051] The mounting wall 220 of this utility model is along a predetermined direction (i.e.) Figures 1 to 3 Extending in the left-right direction (as shown), and with the setting direction perpendicular to the thickness direction of the cell 100 (i.e., Figures 1 to 3 (As shown in the front-back direction), the dimension of the body 310 along the set direction is at least twice the dimension of the body 310 along the thickness direction of the cell 100. This allows the body 310 to have a larger dimension perpendicular to the extension direction, even when the thickness of the cell 100 is limited. The end face near the receiving cavity 210 is also further enlarged, allowing it to accommodate more solder joints for connection with the cell 100. This solution enhances the connection between the terminal post 300 and the cell 100, thereby improving the safety of the battery 10.

[0052] For ease of understanding by those skilled in the art, please refer to the following for details. Figures 1 to 3 As shown, in some embodiments, the mounting wall 220 is located in the length direction of the cell 100 (i.e., ...). Figures 1 to 3 On one side of the vertical direction shown, the extending direction of the mounting wall 220 is parallel to the width direction of the cell 100 (i.e., the vertical direction shown). Figures 1 to 3 (As shown in the left-right direction), the setting direction is parallel to the width direction of the cell 100, and the dimension of the body 310 along the setting direction is at least twice the dimension of the body 310 along the thickness direction of the cell 100. The above embodiment enables the body 310 to have a larger dimension in the width direction perpendicular to the cell 100 when the thickness of the cell 100 is limited, and the end face near the receiving cavity 210 is also further enlarged, so that the end face near the receiving cavity 210 can accommodate more solder joints 500 for connection with the cell 100.

[0053] In other embodiments, the mounting wall 220 is located on one side of the battery cell 100 in the width direction, and the extending direction of the mounting wall 220 is parallel to the length direction of the battery cell 100. The setting direction is also parallel to the length direction of the battery cell 100, and the dimension of the body 310 along the setting direction is at least twice the dimension of the body 310 along the thickness direction of the battery cell 100. These embodiments allow for a larger dimension of the body 310 in the length direction perpendicular to the battery cell 100, even when the thickness of the battery cell 100 is limited. The end face near the receiving cavity 210 is also further enlarged, allowing the end face near the receiving cavity 210 to accommodate more solder joints 500 for connection with the battery cell 100.

[0054] The above embodiments all enable the body 310 to increase the end face for accommodating the solder joint 500 by utilizing the space perpendicular to the thickness direction of the cell 100, thereby enhancing the connection between the terminal 300 and the cell 100 and thus enhancing the safety of the battery 10. On the other hand, since the terminal 300 can utilize the space in a set direction, the current carrying capacity of the terminal 300 can also be further improved.

[0055] Without departing from the inventive concept of this utility model, the battery 10 may be provided with multiple terminals 300 and multiple mounting holes 221 on the mounting wall 220. The body 310 of each terminal 300 passes through a different mounting hole 221, and the side of the body 310 of each terminal 300 near the receiving cavity 210 is connected to the cell 100. It should be noted that some improvements involved in some embodiments of this utility model are also applicable to the case where the battery 10 includes multiple terminals 300. Those skilled in the art can apply the improvements to the battery 10 including multiple terminals 300 without creative effort based on the description in the embodiments, and all such improvements should be considered within the protection scope of this utility model.

[0056] This invention does not limit the connection method between the terminal 300 and the cell 100. In some embodiments, the cell 100 includes a tab 110, which is bonded to the body 310 with conductive adhesive, and the conductive adhesive is applied along a predetermined direction. The conductive adhesive in the above embodiments can enhance the connection between the cell 100 and the terminal 300 by utilizing the space perpendicular to the thickness direction of the cell 100, thereby enhancing the safety of the battery 10.

[0057] In some embodiments, the battery cell 100 includes a tab 110, which is welded to the side of the body 310 axially close to the receiving cavity 210, and the molten pool formed by welding between the tab 110 and the body 310 extends along a predetermined direction. The molten pool in the above embodiments can enhance the connection between the battery cell 100 and the terminal post 300 by utilizing the space perpendicular to the thickness direction of the battery cell 100, thereby enhancing the safety of the battery 10.

[0058] As a preferred option, please refer to Figure 1 , Figure 8 , Figure 9 As shown, in some embodiments, the cell 100 further includes a tab 110, which is welded to the side of the body 310 near the receiving cavity 210. The weld points 500 formed by welding the tab 110 and the body 310 are arranged along a predetermined direction. Using spot welding to connect the tab 110 and the terminal post 300 is more efficient, and the conductivity consistency between different weld points 500 is higher, which is beneficial to the stability of power transmission. Furthermore, the arrangement of the weld points 500 in the above embodiments can also utilize the space perpendicular to the thickness direction of the cell 100 to enhance the connection between the cell 100 and the terminal post 300, thereby enhancing the safety of the battery 10. On the other hand, the overall anti-rotational stress at the connection between the tab 110 and the terminal post 300 can also be correspondingly improved, thereby improving the overall drop resistance of the battery 10.

[0059] Without departing from the inventive concept of this utility model, those skilled in the art can further adjust the dimensions of the body 310 to further utilize the space of the battery in the set direction and increase the solderable area of ​​the body 310. As a preferred embodiment, in the set direction, the dimension of the body 310 along the set direction is at least 2.2 times, 2.5 times, 3 times, 4 times, or other multiples of the dimension of the body 310 along the thickness direction of the cell 100.

[0060] Specifically, in some embodiments, the mounting wall 220 is located on one side of the cell 100 along its length, and the size of the body 310 in the width direction of the cell 100 is at most 0.5 times the size of the mounting wall 220. Through this design, the mounting wall 220 can reserve space in the width direction of the cell 100 for mounting other structures, which is beneficial for further thinning of the battery 10 as a whole.

[0061] For example, please refer to Figures 1 to 3 As shown, in some embodiments, the mounting wall 220 is located on one side of the cell 100 along its length. The battery 10 also includes a pressure relief valve body (not shown). The mounting wall 220 is also provided with an injection hole 260, wherein the pressure relief valve body is disposed on the mounting wall 220 and closes the injection hole 260. The pressure relief valve body and the terminal post 300 are arranged along the width direction of the cell 100. In the above embodiments, the pressure relief valve body disposed on the mounting wall 220 can utilize the space of the mounting wall 220 in the width direction of the cell 100, avoiding the pressure relief valve body occupying the space of the battery 10 in the thickness direction of the cell 100, and the overall thickness of the battery 10 can be further reduced.

[0062] In other embodiments, the mounting wall 220 is located on one side of the cell 100 in the width direction, and the size of the body 310 in the length direction of the cell 100 is at most 0.5 times the size of the mounting wall 220. Through these solutions, the mounting wall 220 can reserve space for mounting other structures in the length direction of the cell 100, which is beneficial for further thinning of the battery 10 as a whole.

[0063] Without departing from the inventive concept of this utility model, those skilled in the art can adjust the shape of the body 310. In some embodiments, the body 310 is a strip structure extending along a predetermined direction. In some embodiments, the body 310 is an oval structure extending along a predetermined direction.

[0064] In some embodiments, there is a gap between the hole wall of the mounting wall 220 and the body 310. Separating the body 310 from the mounting wall 220 can prevent the body 310 from being connected to the mounting wall 220, thereby preventing a short circuit in the battery 10.

[0065] In some embodiments, the battery 10 further includes a seal 700 disposed between the wall of the mounting hole 221 and the body 310. The seal 700 provides radial support to the body 310, increasing the connection stability between the body 310 and the housing 200. The seal 700 disposed between the wall of the mounting hole 221 and the body 310 also provides a sealing effect, further isolating the cavity 210 from the external environment and improving the stability of the internal chemical environment of the battery.

[0066] The above solution is not limited to using common sealing components 700, such as rubber rings or foam, to fill the space between the mounting hole 221 and the body 310. Please refer to [reference needed]. Figure 6 , Figure 7 As shown, it can also be hot melt adhesive 400, such as PP (polypropylene) adhesive, polyester hot melt adhesive, polyolefin hot melt adhesive, EVA (ethylene-vinyl acetate copolymer) hot melt adhesive, etc. The hot melt adhesive 400 that fills the hole wall of mounting hole 221 and body 310 has a stronger sealing effect and is more conducive to improving the stability of the internal chemical environment of battery 10.

[0067] Without departing from the inventive concept of this utility model, those skilled in the art can adjust the structure of the housing 200.

[0068] In some embodiments, please refer to Figure 4 As shown, the housing 200 includes a first housing portion 270 and a second housing portion 280. The first housing portion 270 includes a first sidewall 231, and the second housing portion 280 includes a second sidewall 251 and a third sidewall 241. The first housing portion 270 is connected to the second housing portion 280 in the thickness direction of the cell 100 (i.e., Figure 4On one side of the front-back direction, the first shell portion 270 and the second shell portion 280 together form the receiving cavity 210.

[0069] As a preferred embodiment, please refer to Figures 1 to 3 As shown, the housing 200 includes an upper plate 230, a middle frame 240, and a lower plate 250. The upper plate 230 includes a first sidewall 231, the middle frame 240 includes a third sidewall 241, and the lower plate 250 includes a second sidewall 251. The upper plate 230 and the lower plate 250 are respectively welded to different sides of the middle frame 240 in the thickness direction of the cell 100. The upper plate 230, the middle frame 240, and the lower plate 250 together form a receiving cavity 210. The middle frame 240 includes a mounting wall 220. With the above solution, when forming the housing 200, the processing equipment can process the upper plate 230 and the lower plate 250 separately, thereby further reducing the thickness of the upper plate 230 and the lower plate 250 while ensuring the yield rate, and thus reducing the overall thickness of the battery 10.

[0070] Further, please refer to Figure 5 , Figure 6 As shown, in some embodiments, the battery 10 further includes an insulating member 600, which is attached to the side of the mounting wall 220 near the receiving cavity 210 and is disposed around the body 310. The insulating member 600 surrounding the body 310 can prevent the cell 100 from contacting the mounting wall 220, thereby preventing the cell 100 from short-circuiting.

[0071] Specifically, please refer to Figure 8 , Figure 9 As shown, in some embodiments, the battery cell 100 includes a tab 110. During the connection between the tab 110 and the battery cell 100, the portion of the tab 110 away from its own edge is welded to one side of the body 310 in the axial direction. An insulating member 600, which is disposed around the body 310 and attached to the side of the mounting wall 220 near the receiving cavity 210, can prevent the portion of the tab 110 near its edge from contacting the mounting wall 220, thus preventing a short circuit in the battery cell 100. Without departing from the inventive concept of this utility model, those skilled in the art can adjust the dimensions and specifications of the insulating member 600.

[0072] As described above, some embodiments utilize a seal 700 to connect the body 310 to the mounting wall 220. Those skilled in the art can also use other methods to fix the pole post 300 to the mounting wall 220.

[0073] As a preferred option, please refer to Figures 2 to 7As shown, in some embodiments, the terminal post 300 further includes a protrusion 320 connected to the body 310. The battery 100 has a projection plane in the wall thickness direction of the mounting wall 220. The protrusion 320 has a first projection in the projection plane, and the body 310 has a second projection in the projection plane. The second projection is located within the first projection. The side of the protrusion 320 closest to the mounting wall 220 is connected to the edge of the mounting hole 221. Through the above scheme, the protrusion 320 can restrict the movement of the body 310 connected to the protrusion 320 along the wall thickness direction of the mounting wall, thereby limiting the terminal post 300, enhancing the stability of the connection between the terminal post 300 and the mounting wall 220, and thus improving the overall safety of the battery 10. On the other hand, the protrusion 320 connected to the edge of the mounting hole 221 can also cooperate with the body 310 to seal the mounting hole 221, isolating the receiving cavity 210 from the external environment, preventing leakage of internal substances from the battery 10 and preventing external substances from contaminating the internal chemical environment of the battery 10.

[0074] Without departing from the inventive concept of this utility model, those skilled in the art can adjust the dimensions of the protrusion 320. As a preferred embodiment, the distance by which the protrusion 320 extends beyond the edge of the mounting hole 221 along the wall thickness direction perpendicular to the mounting wall 220 is at least 0.5 mm. With this embodiment, the area of ​​the protrusion 320 that can be used for connection with the mounting wall 220 is larger, which can further enhance the sealing performance of the battery.

[0075] Please refer to Figures 5 to 7 As shown, in some embodiments, the battery 10 further includes a hot melt adhesive 400, and the protrusion 320 is connected to the edge of the mounting hole 221 by the hot melt adhesive 400. Through this solution, the hot melt adhesive 400 can fill the gap between the protrusion 320 and the edge of the mounting hole 221, further enhancing the sealing performance of the housing 200. On the other hand, when the battery is at a high temperature, the hot melt adhesive 400 can melt, thereby creating a gap between the edge of the mounting hole 221 and the protrusion 320, allowing gas generated in the receiving cavity 210 to flow out of the battery through the gap, preventing excessive pressure in the receiving cavity 210. It should be noted that the hot melt adhesive 400 of this invention includes, but is not limited to, PP (polypropylene) adhesive, polyester hot melt adhesive, polyolefin hot melt adhesive, EVA (ethylene-vinyl acetate copolymer) hot melt adhesive, etc.

[0076] As previously described, an insulating element 600 is provided on the side of the mounting wall 220 near the receiving cavity 210. Based on the above solution, in some embodiments, please refer to... Figure 5 , Figure 6As shown, there is a gap between the insulating member 600 and the body 310 in the axial direction perpendicular to the body 310. Through the above scheme, the insulating member 600 can block the contact between the cell 100 and the mounting wall 220, avoiding short circuit of the cell 100, and the gap between the insulating member 600 and the body 310 allows the gas generated in the receiving cavity 210 to pass through, so that when the battery is in a high temperature state, the gas in the receiving cavity 210 can eventually flow out of the battery, avoiding excessive pressure in the receiving cavity 210.

[0077] Please refer to Figure 7 As shown, in some embodiments, the protrusion 320 is located on the side closer to the receiving cavity 210 in the wall thickness direction of the mounting wall 220. During long-term use, the battery 10 is prone to generating gas in the receiving cavity 210, resulting in an increase in internal gas pressure. Through the above solution, the increased gas pressure inside the battery 10 can drive the terminal post 300 to move outward as a whole. The protrusion 320 on the side closer to the receiving cavity 210 will further press the mounting wall 220 away from the receiving cavity 210, making the protrusion 320 fit more tightly with the receiving cavity 210, and further enhancing the sealing performance of the housing 200.

[0078] Based on the above plan, please refer to the following further information. Figure 7 As shown, the battery 10 also includes hot melt adhesive 400, and the protrusion 320 is connected to the edge of the mounting hole 221 via the hot melt adhesive 400. Through this design, the hot melt adhesive 400 can fill the gap between the protrusion 320 and the edge of the mounting hole 221, further enhancing the sealing performance of the housing 200. On the other hand, the increased internal air pressure can drive the terminal post 300 to move outwards as a whole. The protrusion 320 near the receiving cavity 210 will further compress the hot melt adhesive 400 away from the receiving cavity 210, reducing the gaps inside the hot melt adhesive 400, and further strengthening the sealing performance of the housing 200.

[0079] Please refer to Figure 5 As shown, in some embodiments, the battery 10 further includes hot melt adhesive 400. The protrusion 320 is connected to the edge of the mounting hole 221 by the hot melt adhesive 400. In the wall thickness direction of the mounting wall 220, the protrusion 320 is located on the side away from the receiving cavity 210. As mentioned above, the internal air pressure of the battery 10 tends to increase during long-term use. With the above solution, the increased air pressure inside the battery 10 can drive the terminal post 300 to move outward as a whole, causing the protrusion 320 to detach from the hot melt adhesive 400. A gap appears between the protrusion 320 and the mounting wall 220, and the gas inside the receiving cavity 210 can flow out to the outside of the housing 200 through the mounting hole 221, thereby reducing the internal air pressure of the receiving cavity 210 and preventing the housing 200 from cracking due to excessive internal air pressure of the battery 10.

[0080] This utility model also proposes an electrical device, such as a mobile phone, watch, bracelet, tablet, or new energy vehicle, which includes a battery 10 as described in any of the above embodiments. In any of the above embodiments, the battery 10 can utilize the space perpendicular to the thickness direction of the cell 100 to enhance the connection strength between the terminal post 300 and the cell 100, thereby making the battery 10 safer. Consequently, the electrical device using the battery 10 is also safer, which helps to increase the service life of the electrical device.

[0081] It should be noted that since this embodiment adopts all the technical features of the battery 10 in the above embodiment, the electrical device in this embodiment has all the beneficial effects brought by the battery 10 in the above embodiment, which will not be repeated here.

[0082] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A battery, characterized by, The battery comprises: an electric core with a set thickness; a shell comprising a first side wall and a second side wall arranged in a thickness direction of the electric core, and a third side wall arranged between the first side wall and the second side wall and surrounding the first side wall and the second side wall, the first side wall, the second side wall and the third side wall collectively forming a receiving cavity, the electric core being located in the receiving cavity, the third side wall comprising a mounting wall extending in a set direction perpendicular to the thickness direction of the electric core, the mounting wall having a through mounting hole; a pole comprising a body in a column structure, the body being arranged through the mounting hole and electrically connected to the electric core, a dimension of the body in the set direction being at least 2 times a dimension of the body in the thickness direction of the electric core.

2. The battery of claim 1, wherein, The pole further comprises a protruding part connected to the body, the battery having a projection plane in a wall thickness direction of the mounting wall, the protruding part having a first projection in the projection plane, the body having a second projection in the projection plane, the second projection being located in the first projection, the protruding part being connected to a hole edge of the mounting hole at a side close to the mounting wall.

3. The battery of claim 2, wherein, The battery further comprises a hot melt adhesive, the protruding part being connected to the hole edge of the mounting hole through the hot melt adhesive.

4. The battery of claim 3, wherein, The protruding part is located at a side of the mounting wall away from the receiving cavity.

5. The battery according to claim 2 or 3, characterized in that, The protruding part is located at a side of the mounting wall close to the receiving cavity.

6. The battery of claim 1, wherein, The battery further comprises a sealing member arranged between a hole wall of the mounting hole and the body.

7. The battery of claim 1, wherein, The shell comprises an upper plate, a middle frame and a lower plate, the upper plate comprising the first side wall, the middle frame comprising the third side wall, and the lower plate comprising the second side wall, the upper plate and the lower plate being respectively welded to different sides of the middle frame in the thickness direction of the electric core, the upper plate, the middle frame and the lower plate collectively forming the receiving cavity, and the middle frame comprising the mounting wall.

8. The battery of claim 1, wherein, The electric core further comprises a tab welded to a side of the body close to the receiving cavity, and the tab and the body are arranged in the set direction.

9. The battery of claim 1, wherein, The battery further comprises an insulating member attached to a side of the mounting wall close to the receiving cavity and surrounding the body.

10. An electrical device, characterized by The battery comprises the battery as claimed in any one of claims 1 to 9.

Images