Battery shell and battery

Abstract

The utility model discloses a battery shell and a battery, a concave cavity is formed in a shell body of the battery shell, the concave cavity is provided with an open cavity opening, and a battery cell can be taken and placed in the concave cavity through the cavity opening. The clamping groove is formed in the inner side wall of the concave cavity and used for clamping the flange of the cover body. In the process of packaging the battery cell, the flange of the cover body is aligned with the clamping groove of the shell, then the cover body is pressed to enable the clamping part of the cover body to be completely embedded into the clamping groove, and then welding equipment is used for welding the welding part of the cover body; under the action of high temperature, the welding flux is melted and fills the gap between the welding part and the shell, and meanwhile, some welding slag is generated, and as the clamping groove is formed in the inner side wall of the concave cavity, the welding slag can be intercepted by the inner wall of the clamping groove, so that the welding slag is effectively prevented from entering the concave cavity, and a packaged battery cell is prevented from being scalded or punctured. Through the design, the overall safety and reliability of the battery shell are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery shell and a battery. Background Art

[0002] Through effective packaging, the physical and chemical effects of the external environment on the battery cells can be prevented, thereby improving the stability and service life of the battery.

[0003] At present, the battery shell structure on the market is mostly a two-piece set of cover plate and shell. This structure is usually assembled by laser welding to ensure a firm connection between the cover plate and the shell.

[0004] However, this solution has shortcomings: the molten metal produced during the welding process of the cover and the shell can easily fall into the interior of the battery shell and directly contact the battery cells, which may cause burns to the battery cells. In severe cases, there is a risk of short circuit, affecting the safety and reliability of the battery. Utility Model Content

[0005] The main purpose of the utility model is to provide a battery shell, aiming to solve the problem that molten metal generated during the welding process of the existing battery shell and the cover plate is easy to fall into the inside of the battery shell and burn the battery core.

[0006] In order to achieve the above object, the utility model provides a battery housing, which includes:

[0007] A housing, wherein the housing is formed with a concave cavity, wherein the concave cavity has an open cavity opening, and the cavity opening is used to allow the power core to be taken in and placed in the concave cavity;

[0008] A cover body, the cover body is connected to the shell body to cover the cavity;

[0009] The inner wall of the cavity is provided with a slot, the outer side of the cover is provided with a flange, and the flange includes a locking portion locked in the slot and a welding portion exposed outside the slot for welding to the shell.

[0010] In some embodiments, an outer wall of the locking portion and an inner wall of the locking slot form a cavity.

[0011] In some embodiments, the concave cavity has an inner bottom wall disposed opposite to the cavity opening;

[0012] The outer side wall of the locking portion extends from the first end portion toward the side where the inner bottom wall is located along the axial direction of the cover body in a trend of gradually decreasing distance to the central axis of the cover body.

[0013] In some embodiments, the outer side wall of the locking portion is a first smooth arc surface;

[0014] The inner side wall of the concave cavity forms a second smooth arc surface at the cavity mouth, and the second smooth arc surface extends toward the side where the inner bottom wall is located along the axial direction of the shell with a trend of gradually decreasing distance from the central axis of the shell, and the second smooth arc surface is used to cooperate with the first smooth arc surface to guide the locking portion to slide into the locking groove.

[0015] In some embodiments, the slot is an annular slot arranged around the inner wall of the cavity.

[0016] In some embodiments, the card slot has a slot opening, a first slot wall, a second slot wall and a third slot wall, the first slot wall is arranged opposite to the slot opening, the second slot wall and the third slot wall are arranged opposite to each other and extend from the slot opening to the first slot wall respectively;

[0017] At least one of the second groove wall and the third groove wall is provided with a first adhesive layer.

[0018] In some embodiments, the first groove wall is provided with a second adhesive layer.

[0019] In some embodiments, the first adhesive layer is a polypropylene layer;

[0020] And / or, the second adhesive layer is a silicone layer.

[0021] In some embodiments, the cover comprises:

[0022] A cover plate, wherein a flange is formed on the outer side of the cover plate;

[0023] A sealing ring, the sealing ring being arranged on a side of the cover plate facing the concave cavity;

[0024] A fixing member, arranged on a side of the sealing ring facing away from the cover plate and located in the concave cavity;

[0025] A pole, one end of which is penetrated by the sealing ring and the fixing member in sequence, and one end of which extends into a concave cavity formed by the cover plate and the shell for electrically connecting to the battery cell, and the other end of which protrudes from a side of the cover plate facing away from the concave cavity.

[0026] The utility model further provides a battery, comprising a battery cell and the battery casing of the aforementioned embodiment, wherein the battery cell is placed in the concave cavity of the battery casing.

[0027] In the technical solution of the utility model, a concave cavity is formed in the shell, and the concave cavity has an open cavity opening, and the battery cell can be taken and placed in the concave cavity through the cavity opening. A card slot is provided on the inner side wall of the concave cavity for the flange of the cover body to be inserted. In the process of encapsulating the battery cell, the flange of the cover body is aligned with the card slot of the shell, and then the cover body is pressed so that its card position part is completely embedded in the card slot, and then the welding part of the cover body is welded using welding equipment; under the action of high temperature, the solder will melt and fill the gap between the welding part and the shell, and some welding slag will be generated at the same time. Since the inner side wall of the concave cavity is provided with a card slot, the welding slag will be intercepted by the inner wall of the card slot, thereby effectively preventing the welding slag from entering the interior of the concave cavity and avoiding scalding or piercing the encapsulated battery cell. Through this design, the overall safety and reliability of the battery shell are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of a battery housing in one embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of a cover body in one embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of a housing in one embodiment of the utility model;

[0031] Figure 4 This is a schematic diagram of the structure of a battery housing in one embodiment of the utility model;

[0032] Figure 5 It is a structural schematic diagram of a cover body in one embodiment of the utility model.

[0033] Description of Figure Numbers:

[0034] 100, shell; 102, concave cavity; 102a, inner bottom wall; 200, slot; 202, notch; 204, first slot wall; 206, second slot wall; 208, third slot wall; 211, first adhesive layer; 212, second adhesive layer; 104, cavity opening; 104a, second smooth arc surface; 300, cover; 302, flange; 304, locking portion; 300a, first smooth arc surface; 310, cover plate; 311, pole; 312, sealing ring; 313, fixing piece; E, welding portion; F, cavity.

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the scheme in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0039] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0040] Reference Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a battery housing in one embodiment of the utility model; Figure 2 Schematic diagram of the structure of the cover body 300 in one embodiment of the present invention.

[0041] The battery housing provided in the embodiment of the utility model comprises:

[0042] The housing 100 is formed with a cavity 102, and the cavity 102 has an open cavity opening 104, and the cavity opening 104 is used to take the power core into and put it in the cavity 102;

[0043] The cover 300 covers the housing 100 to seal the cavity 104;

[0044] The inner wall of the cavity 102 is provided with a slot 200 , and the outer side of the cover 300 is provided with a flange 302 . The flange 302 includes a locking portion 304 locked in the slot 200 and a welding portion E exposed outside the slot 200 for welding to the housing 100 .

[0045] In this embodiment, the shell 100 is mainly used to store the battery cells and provide an installation base for the cover 300, wherein the shell 100 is open at one end and hollow inside, that is, a cavity 102 is formed inside the shell 100, and the cavity 102 has an open cavity 104, and the cavity 104 is used to allow the battery cells to be taken in and placed in the cavity 102. In actual packaging, the shape of the battery cells may be different. For example, the laminated battery cells may be square, while the wound battery cells are cylindrical. Therefore, the shape of the shell 100 in this embodiment is adapted to the shape of the battery cells, and may also be set to a square or cylindrical shape. Of course, the shape of the shell 100 is not limited to these two shapes. The shape of the shell 100 in this embodiment can be adjusted to follow the shape of the battery cells, with the purpose of better matching the battery cell packaging.

[0046] After the shell 100 encapsulates the battery cell, it mainly provides strong physical protection for the battery cell and bears the role of holding the electrolyte. From these two aspects, the shell 100 needs to at least ensure these two aspects in terms of material. For example, its material can be metal material, such as aluminum alloy, stainless steel, etc. These materials have good mechanical strength and corrosion resistance, and can provide reliable protection for the battery cell. At the same time, the materials of the shell 100 and the cover 300 should have good welding performance to ensure that a firm connection can be formed during the welding process to avoid welding defects.

[0047] When the battery cell is actually packaged, the battery cell is placed into the cavity 102 of the shell 100 through the cavity 104, and then the cover 300 needs to be placed at the cavity 104 of the cavity 102 to cover the cavity 104, that is, the cover 300 cooperates with the shell 100 to package the battery cell. In order to better connect and cooperate with the shell 100, the shape of the cover 300 also needs to be adapted to the shell 100. For example, as mentioned above, when the shell 100 is square, the cover 300 is also set to be square.

[0048] In this embodiment, in order to better encapsulate the battery cell, the cover 300 is usually welded. However, during the welding process, molten metal (referred to as welding slag) may fall into the cavity 102, thereby damaging the encapsulated battery cell. In order to solve this problem, this embodiment adopts a card slot 200 provided on the inner side wall of the cavity 102, and the card slot 200 is used for the outer flange 302 of the cover 300 to be inserted.

[0049] Specifically, the outer side of the cover 300 is provided with a flange 302, and the flange 302 includes a locking portion 304 locked in the slot 200 and a welding portion E exposed outside the slot 200 for welding to the housing 100. During welding, the welding portion E is welded to the outer surface of the housing 100, so that the cover 300 is firmly fixed on the housing 100. In this process, the slot 200 provides an accurate positioning, so that the flange 302 of the cover 300 can be stably embedded in the slot 200, ensuring that the cover 300 is not easy to move during the welding process. This helps to ensure the accuracy and firmness of the welding.

[0050] At the same time, during the welding process, due to the high temperature, the solder will melt and fill the gap between the welding part E and the shell 100, and a certain amount of welding slag will also be generated. These welding slags may fall due to gravity or the heat flow generated during the welding process. If there is no card slot 200, the welding slag may fall directly into the concave cavity 102 and contact the battery cell, causing damage to the battery cell or packaging failure. Therefore, in this embodiment, the card slot 200 is designed on the inner wall of the concave cavity 102, and its depth and width are carefully designed to effectively receive the welding slag. During the welding process, the welding slag will first contact the inner wall of the card slot 200, and stay in the card slot 200 under the action of gravity, and will not continue to fall into the concave cavity 102. In this way, the welding slag is isolated in the card slot 200, avoiding direct contact with the battery cell.

[0051] In the specific welding process, the operator or the mechanical back wall aligns the flange 302 of the cover 300 with the slot 200 of the shell 100, and gently presses the cover 300 so that the locking portion 304 is completely embedded in the slot 200, ensuring that the cover 300 and the shell 100 are tightly matched. Finally, the welding equipment is used to weld the welding portion E of the cover 300. The welding slag generated during the welding process will fall due to gravity, but due to the existence of the slot 200, the welding slag will be trapped by the inner wall of the slot 200 and cannot enter the concave cavity 102. Through this design, the slot 200 can not only improve the welding firmness between the cover 300 and the shell 100, but also effectively prevent the welding slag from entering the interior of the concave cavity 102 and piercing the packaged battery cell, thereby improving the overall safety and reliability of the battery shell.

[0052] In the technical solution of this embodiment, the shell 100 is formed with a cavity 102, and the cavity 102 has an open cavity 104, and the battery cell can be taken in and put into the cavity 102 through the cavity 104. A card slot 200 is provided on the inner side wall of the cavity 102 for the flange 302 of the cover 300 to be inserted into; in the process of packaging the battery cell, after the flange 302 of the cover 300 is aligned with the card slot 200 of the shell 100, the cover 300 is gently pressed to make its card portion 304 completely It is embedded in the card slot 200, and finally the welding part E of the cover body 300 is welded using welding equipment. Under the action of high temperature, the solder will melt and fill the gap between the welding part E and the shell 100, and some welding slag will be generated at the same time. Since the inner wall of the concave cavity 102 is provided with a card slot 200, the welding slag will be intercepted by the inner wall of the card slot 200, and then the welding slag can be effectively prevented from entering the interior of the concave cavity 102, scalding or piercing the packaged battery cells, thereby improving the overall safety and reliability of the battery casing.

[0053] Continue reading Figure 1 In this embodiment, a cavity F is formed between the outer wall of the locking portion 304 and the inner wall of the locking slot 200 .

[0054] In the embodiment of the utility model, the inner wall of the concave cavity 102 of the housing 100 is provided with a slot 200, and the outer side of the cover 300 is provided with a flange 302. The flange 302 includes a locking portion 304 locked in the slot 200 and a welding portion E exposed outside the slot 200 for welding to the housing 100, that is, when the cover 300 is installed on the housing 100, the outer side wall of the locking portion 304 and the inner side wall of the slot 200 enclose a cavity F, and the cavity F is mainly used to accommodate welding slag generated during the welding process of the welding portion E and the housing 100 and falling into the slot 200.

[0055] The portion of the flange 302 of the cover 300 that is close to the inner side of the cover 300 is called the locking portion 304. The size and shape of the locking portion 304 match the slot 200 to ensure that it can be stably embedded in the slot 200. The slot 200 is provided on the inner side wall of the concave cavity 102 of the housing 100. The depth and width of the slot 200 are precisely designed to accommodate the locking portion 304 of the flange 302 of the cover 300. When the locking portion 304 is embedded in the slot 200, an annular cavity F is formed between the outer side wall of the locking portion 304 and the inner side wall of the slot 200.

[0056] This cavity F exists continuously in the entire joint area of ​​the cover body 300 and the shell 100. This cavity F is mainly used to accommodate welding slag. Specifically, during the welding process, the welding slag generated by welding will fall due to gravity. Due to the existence of the slot 200 and the cavity F, the welding slag will preferentially fall into the cavity F instead of directly entering the concave cavity 102, which effectively prevents the welding slag from directly contacting the battery cell, thereby preventing the battery cell from being punctured, scalded or damaged.

[0057] In addition, the existence of the cavity F plays a buffering role to a certain extent. Specifically, during the welding process, the metal material will expand when heated and shrink after cooling, which is prone to stress concentration. The cavity F can also buffer these stresses and avoid cracks or other damage at the welded joint.

[0058] Continue reading Figure 2 In this embodiment, the concave cavity 102 has an inner bottom wall 102a which is spaced apart and arranged opposite to the cavity opening 104;

[0059] The outer wall of the locking portion 304 extends along the axial direction of the cover body 300 from the first end toward the side where the inner bottom wall 102 a is located in a trend of gradually decreasing distance to the central axis of the cover body 300 .

[0060] In this embodiment, the outer side wall of the locking portion 304 extends along the axial direction of the cover body 300, and the distance from the first end of the cover body 300 to the central axis of the cover body 300 gradually decreases toward the side where the inner bottom wall 102a is located. This design allows the locking portion 304 to have an inclined surface, so that the cover body 300 can slide into the slot 200 more easily. The outer side wall of the locking portion 304 is set to have an inclined surface, so that it can better slide in contact with the cavity 104, so as to be smoothly locked into the slot 200. The design of the inclined surface helps to reduce sliding resistance and improve installation efficiency.

[0061] Of course, in addition to the inclined surface, the locking portion 304 can also be configured to have a curved surface. The curved surface design can not only improve the smoothness of the edge of the cover 300 sliding into the slot 200, but also form a more uniform force distribution between the locking portion 304 and the slot 200, thereby increasing the structural stability.

[0062] In this embodiment, whether it is the inclined surface of the locking portion 304 or the curved surface of the locking portion 304, it can improve the smoothness of the edge of the cover body 300 sliding into the slot 200. Such a design can provide a better guiding effect during the installation of the cover body 300, so that the cover body 300 can be smoothly and accurately inserted into the slot 200.

[0063] In addition to the above embodiment, the locking portion 304 of the edge of the cover 300 is set to be inclined or light arc surface to improve the smoothness of the card slot 200, the edge of the cavity 104 can also be set to have an inclined or light arc surface. Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of the cover body 300 in one embodiment of the utility model. Figure 3 Schematic diagram of the structure of the housing 100 in one embodiment of the present invention.

[0064] In this embodiment, the outer side wall of the locking portion 304 is a first smooth arc surface 300a;

[0065] The inner wall of the concave cavity 102 is formed with a second smooth arc surface 104a at the cavity opening 104, and the second smooth arc surface 104a extends toward the side where the inner bottom wall 102a is located along the axial direction of the shell 100 with a trend of gradually decreasing distance from the central axis of the shell 100, and the second smooth arc surface 104a is used to cooperate with the first smooth arc surface 300a to guide the locking portion 304 to slide into the slot 200.

[0066] In this embodiment, the locking portion 304 at the edge of the cover 300 and the cavity opening 104 of the cavity 102 are designed to have smooth curved surfaces to improve the smoothness and installation efficiency of the cover 300 being locked into the slot 200. Specifically, the outer wall of the locking portion 304 is a first smooth curved surface 300a, and the inner wall of the cavity 102 is formed with a second smooth curved surface 104a at the cavity opening 104. The two cooperate with each other to ensure that the cover 300 can slide smoothly into the slot 200.

[0067] During the assembly process, according to the specific dimensions of the battery cell and the housing 100, the outer wall of the locking portion 304 of the cover 300 is designed to be a first smooth arc surface 300a, ensuring that it can gradually extend from the first end to the central axis of the cover 300 along the axial direction of the cover 300. At the same time, the cavity opening 104 of the inner wall of the concave cavity 102 is designed to be a second smooth arc surface 104a, ensuring that it gradually extends along the axial direction of the housing 100 toward the central axis of the housing 100.

[0068] Align the first smooth curved surface 300a of the cover 300 with the second smooth curved surface 104a at the cavity 104 of the shell 100, and gently apply pressure to make the cover 300 slide along the second smooth curved surface 104a. During the sliding process, the first smooth curved surface 300a and the second smooth curved surface 104a cooperate with each other to guide the locking portion 304 of the cover 300 to slide smoothly into the slot 200. After the cover 300 is locked into the slot 200, the welding portion E of the cover 300 is welded using welding equipment to ensure that a firm connection is formed between the welding portion E and the shell 100. During the welding process, the cavity F in the slot 200 will receive welding slag to prevent it from entering the concave cavity 102.

[0069] Thus, in this embodiment, by designing the outer side wall of the locking portion 304 as the first smooth arc surface 300a, and forming the second smooth arc surface 104a at the cavity 104, the smoothness of the edge of the cover 300 sliding into the slot 200 can be significantly improved, and the installation efficiency and structural stability can be improved. This design can not only reduce friction and wear during the installation process, but also enhance the sealing performance of the cover 300 and the housing 100, thereby providing more reliable protection for the battery cell.

[0070] When packaging the battery cell, considering the sealing performance, it is necessary to weld the edge of the cover 300 and the inner wall of the cavity 104 in a whole circle, regardless of whether the shell 100 is square or cylindrical. In order to receive the welding slag, the card slot 200 needs to be set to a corresponding shape. Taking the shell 100 as a cylindrical shape, for example, the card slot 200 needs to be set as an annular buckle. Specifically, the card slot 200 is an annular groove arranged around the inner wall of the cavity 102.

[0071] In this embodiment, the slot 200 is designed as an annular groove surrounding the inner wall of the cavity 102 to ensure full sealing and stability when packaging the battery cell. Regardless of whether the housing 100 is square or cylindrical, in order to receive welding slag and ensure sealing, the slot 200 needs to be designed into a corresponding shape.

[0072] Taking the cylindrical housing 100 as an example, the card slot 200 is designed as an annular groove surrounding the inner wall of the cavity 102. For a square housing 100, the card slot 200 is designed as a closed annular groove surrounding all sides. The annular grooves are evenly distributed on the inner wall of the cavity 102, ensuring that the cover 300 can be in full contact with the inner wall of the cavity 102 during the packaging process, thereby improving the sealing effect.

[0073] In this embodiment, in response to the situation where the edge of the cover body 300 is welded to the inner wall of the cavity opening 104 in a full circle, the slot 200 is designed to be an annular groove surrounding the inner wall of the cavity 102. Regardless of whether the shell 100 is square or cylindrical, it can effectively absorb the welding slag generated during the welding process and prevent it from entering the interior of the cavity 102.

[0074] See also Figure 4 , Figure 4 It is a schematic structural diagram of a battery housing in one embodiment of the utility model.

[0075] In this embodiment, the card slot 200 has a slot opening 202, a first slot wall 204, a second slot wall 206 and a third slot wall 208. The first slot wall 204 is disposed opposite to the slot opening 202, and the second slot wall 206 and the third slot wall 208 are disposed opposite to each other and extend from the slot opening 202 to the first slot wall 204 respectively.

[0076] At least one of the second groove wall 206 and the third groove wall 208 is provided with a first adhesive layer 211 .

[0077] In this embodiment, the slot 200 is composed of a first slot wall 204, a second slot wall 206 and a third slot wall 208, and a notch 202 is configured on the side opposite to the first slot wall 204, and the notch 202 can be used for the latching portion 304 at the edge of the cover body 300 to enter the slot 200. As for how the slot 200 in this embodiment is formed, there are many ways, for example, the slot 200 can be manufactured together with the housing 100 by an integral molding method. This method can ensure the integrity and strength of the structure. Of course, the slot 200 can also be formed by subsequent processing, such as mechanical processing or mold molding. This method is highly flexible and the size and shape of the slot 200 can be adjusted according to actual needs.

[0078] In this embodiment, the slot 200 is not only used for the insertion of the locking portion 304 in the edge of the cover body 300, but also for the installation of the first adhesive layer 211. The first adhesive layer 211 in this embodiment can provide additional support after the cover body 300 is inserted into the slot 200, ensuring that the cover body 300 is more stable and preventing the edge of the cover body 300 from sliding in the slot 200. In addition, the first adhesive layer 211 can increase the sealing between the slot 200 and the cover body 300 and reduce the risk of liquid leakage.

[0079] There are at least two ways to install the first adhesive layer 211. For example, one is single-sided installation, such as installing the first adhesive layer 211 on the second groove wall 206 or the third groove wall 208. This method is simple to install and can effectively improve the stability and sealing of the cover 300. Of course, in other embodiments, double-sided installation can also be adopted, specifically, the first adhesive layer 211 is installed on both the second groove wall 206 and the third groove wall 208.

[0080] By designing the card slot 200 in this embodiment to have a structure with a notch 202, a first slot wall 204, a second slot wall 206 and a third slot wall 208, and providing a first adhesive layer 211 on the second slot wall 206 or the second and third slot walls 208, the stability of the cover 300 and the sealing performance of the battery housing can be significantly improved. The design of the card slot 200 can not only effectively receive the welding slag generated during the welding process and prevent it from entering the concave cavity 102, but also can ensure a stable connection between the cover 300 and the card slot 200 with the cooperation of the first adhesive layer 211.

[0081] Continue reading Figure 4 In this embodiment, the first groove wall 204 is provided with a second adhesive layer 212 .

[0082] In this embodiment, in order to further improve the stability of the cover body 300 and the card slot 200 and the sealing performance of the battery housing, in addition to setting the first glue layer 211 on the second slot wall 206 or the third slot wall 208, a second glue layer 212 is also set on the first slot wall 204. The first glue layer 211 and the second glue layer 212 cooperate to form an auxiliary layer, which plays a role of multiple protection and stability. Specifically, the first glue layer 211 is set on the second slot wall 206 and / or the third slot wall 208. The first glue layer 211 can be made of a soft material, such as silica gel, which has good elasticity and buffering performance. The second glue layer 212 is set on the first slot wall 204 and cooperates with the first glue layer 211 to form a complete auxiliary layer. This auxiliary layer can provide additional support, so that the cover body 300 is firmly connected to the card slot 200, preventing the cover body 300 from sliding or loosening during use.

[0083] The auxiliary layer can fill the gap between the cover 300 and the card slot 200, improve the sealing effect, reduce the risk of leakage, and ensure the reliability of the battery shell. When the battery is subjected to external impact, the first adhesive layer 211 and the second adhesive layer 212 can act as soft layers to provide a buffer, reduce battery deformation and damage, and protect the safety of the battery cell.

[0084] Furthermore, the first adhesive layer 211 is a polypropylene layer;

[0085] And / or, the second adhesive layer 212 is a silicone layer.

[0086] In this embodiment, the material selection of the adhesive layer is further improved to enhance the stability and sealing performance of the battery housing. Specifically, the first adhesive layer 211 is a polypropylene layer, and the second adhesive layer 212 is a silicone layer. In this embodiment, the first adhesive layer 211 is a polypropylene layer, and polypropylene is a material with excellent chemical stability, heat resistance and good mechanical properties. As the first adhesive layer 211, polypropylene can provide sufficient elasticity and support during the installation process to ensure the stable connection between the cover 300 and the card slot 200.

[0087] The second adhesive layer 212 is made of silicone because it has excellent elasticity, heat resistance and chemical stability, and can maintain its performance in a wide temperature range. As the second adhesive layer 212, the silicone layer can provide better sealing and buffering effects, protecting the battery from deformation and damage when subjected to external impact.

[0088] See also Figure 5 , Figure 5 It is a structural schematic diagram of a cover body in one embodiment of the utility model.

[0089] In this embodiment, the cover 300 includes:

[0090] A cover plate 310, wherein a flange 302 is formed on the outer side of the cover plate 310;

[0091] A sealing ring 312, which is disposed on a side of the cover plate 310 facing the cavity 102;

[0092] The fixing member 313 is disposed on a side of the sealing ring 312 facing away from the cover plate 310 and is located in the concave cavity 102;

[0093] The pole 311 has a sealing ring 312 and a fixing member 313 inserted into one end of the pole 311 in sequence, and one end of the pole 311 extends into the concave cavity 102 formed by the cover plate 310 and the shell for electrically connecting the battery cell, and the other end of the pole 311 protrudes from the side of the cover plate 310 facing away from the concave cavity 102.

[0094] In this embodiment, the cover plate 310 is the main structural part of the cover body 300, which is responsible for closing the opening of the battery housing and providing mechanical protection and sealing. A flange 302 is formed on the outer side of the cover plate 310 for cooperating with the slot 200 of the housing 100 to achieve a stable connection. In this embodiment, the cover plate 310 is generally made of metal materials, such as aluminum alloy or stainless steel, which have high strength, corrosion resistance and good conductivity, and can provide reliable protection and electrical connection for the battery cell.

[0095] The pole 311 is provided on the cover plate 310 and is mainly used to realize the electrical connection between the battery cell and the external circuit. The pole 311 is usually made of a highly conductive metal material, such as copper or silver-plated copper, to ensure low resistance and high current carrying capacity.

[0096] The sealing ring 312 is sleeved on one end of the pole 311 and is located in the concave cavity 102, and is used to seal the gap between the pole 311 and the cover plate 310 to prevent electrolyte leakage. The fixing member 313 is provided on one end of the pole 311 on which the sealing ring 312 is sleeved, and is in contact with the sealing ring 312, and is used to fix the pole 311 and the sealing ring 312 to the cover plate 310, thereby ensuring the stable position of each component and the sealing effect.

[0097] In this embodiment, the stability and sealing performance of the cover 300 can be ensured by properly designing and installing the cover plate 310, the pole 311, the sealing ring 312 and the fixing member 313. The various components cooperate with each other to form a complete cover 300 structure, providing reliable protection and electrical connection for the battery cell.

[0098] The utility model further proposes a battery, comprising a battery cell and a battery housing of the aforementioned embodiment. The specific structure of the battery housing refers to the aforementioned embodiment. Since the battery adopts all the technical solutions of all the aforementioned embodiments, it at least has all the technical effects brought by the technical solutions of the aforementioned embodiments, which will not be described one by one here. The battery cell is placed in the concave cavity 102 of the battery housing.

[0099] The battery in this embodiment uses the battery housing of the above-mentioned embodiment. During the welding process, the slot 200 can effectively receive the welding slag, preventing the welding slag from entering the cavity 102 and contacting the battery cell, avoiding damage to the battery cell, and improving the reliability and service life of the battery. In addition, the glue layer in the slot 200 can provide buffer protection when the battery is subjected to external impact, reduce deformation and damage of the battery cell, and further improve the safety of the battery.

[0100] The above description is only a partial or preferred embodiment of the present invention. Neither the text nor the drawings can limit the scope of protection of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the overall concept of the present invention, or direct / indirect application in other related technical fields are included in the scope of protection of the present invention.

Claims

1. A battery casing, characterized in that: include: A housing, wherein the housing is formed with a concave cavity, wherein the concave cavity has an open cavity opening, and the cavity opening is used to allow the power core to be taken in and placed in the concave cavity; A cover body, the cover body is connected to the shell body to cover the cavity; The inner wall of the cavity is provided with a slot, the outer side of the cover is provided with a flange, and the flange includes a locking portion locked in the slot and a welding portion exposed outside the slot for welding to the shell.

2. The battery housing according to claim 1, characterized in that: The outer side wall of the locking portion and the inner side wall of the locking slot enclose a cavity.

3. The battery housing according to claim 1, characterized in that: The concave cavity has an inner bottom wall arranged opposite to the cavity opening with a spacing; The outer side wall of the locking portion extends from the first end portion along the axial direction of the cover body toward the side where the inner bottom wall is located in a trend of gradually decreasing distance to the central axis of the cover body.

4. The battery housing according to claim 3, characterized in that: The outer side wall of the locking portion is a first smooth arc surface; The inner side wall of the concave cavity forms a second smooth arc surface at the cavity mouth, and the second smooth arc surface extends toward the side where the inner bottom wall is located along the axial direction of the shell with a trend of gradually decreasing distance from the central axis of the shell, and the second smooth arc surface is used to cooperate with the first smooth arc surface to guide the locking portion to slide into the locking groove.

5. The battery casing according to any one of claims 1 to 4, characterized in that: The clamping groove is an annular groove arranged around the inner side wall of the cavity.

6. The battery casing according to any one of claims 1 to 4, characterized in that: The card slot has a slot opening, a first slot wall, a second slot wall and a third slot wall. The first slot wall is arranged opposite to the slot opening, and the second slot wall and the third slot wall are arranged opposite to each other and extend from the slot opening to the first slot wall respectively.

7. The battery housing according to claim 6, characterized in that: At least one of the second groove wall and the third groove wall is provided with a first adhesive layer.

8. The battery casing according to claim 7, characterized in that: The first groove wall is provided with a second adhesive layer.

9. The battery casing according to any one of claims 1 to 4, characterized in that: The cover body comprises: A cover plate, wherein a flange is formed on the outer side of the cover plate; A sealing ring, the sealing ring being arranged on a side of the cover plate facing the concave cavity; A fixing member, arranged on a side of the sealing ring facing away from the cover plate and located in the concave cavity; A pole, one end of which is penetrated by the sealing ring and the fixing member in sequence, and one end of which extends into a concave cavity formed by the cover plate and the shell for electrically connecting to the battery cell, and the other end of which protrudes from a side of the cover plate facing away from the concave cavity.

10. A battery, characterized in that: It comprises a battery cell and a battery casing according to any one of claims 1 to 9, wherein the battery cell is placed in the concave cavity of the battery casing.

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