Housing for accommodating an electric core, battery housing assembly and battery

Abstract

The utility model discloses a kind of shell for containing battery cell, battery shell assembly and battery, shell includes: coaming, coaming is enclosed and forms the accommodation cavity of open mouth, the edge of the coaming one end is equipped with limiting portion, the limiting portion is used to circumferential limit cover plate, the cover plate is used to cover the open mouth.The utility model is used in the shell for containing battery cell, coaming is enclosed and forms the accommodation cavity of open mouth, to contain battery cell;The edge of coaming one end is equipped with limiting portion, when cover plate and shell assembly cover open mouth, circumferential limit is carried out through the limiting portion being equipped on coaming, and located in the edge range of frame body, that is, cover plate will not exceed frame body edge, improves assembly accuracy, can guarantee product appearance and user hand feeling, and will not lead to product volume increase, meet the light and thin trend of consumer product.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a housing, battery case assembly and battery for accommodating battery cells. Background Technology

[0002] With the rapid development of new energy technologies, lithium batteries have become the core power source for consumer electronics products such as smartphones due to their outstanding advantages such as high energy density, long cycle life and low self-discharge rate. Their structural design directly affects the competitiveness of end products.

[0003] In related technologies, lithium batteries typically employ a combined structure of a steel casing and a battery cell, with the battery cell encapsulated within the steel casing. In actual production, the cover plate of the steel casing is assembled and welded to the casing. However, due to factors such as machining tolerances and assembly misalignment, the cover plate can easily extend beyond the casing edge during assembly, resulting in insufficient assembly precision. This problem leads to several drawbacks: firstly, it damages the product's appearance and affects the user's feel; secondly, it increases the product's size, contradicting the trend towards thinner and lighter consumer products. Utility Model Content

[0004] The main purpose of this utility model is to propose a housing for accommodating battery cells, which aims to solve the technical problem that the cover plate easily extends beyond the edge of the housing and the assembly accuracy is insufficient when assembling the cover plate and the housing in existing batteries.

[0005] To achieve the above objectives, this utility model proposes a housing for accommodating battery cells, the housing comprising: A partition panel is provided to form an open receiving cavity. One end edge of the partition panel is provided with a limiting part, which is used to circumferentially limit the cover plate, and the cover plate is used to seal the opening.

[0006] Optionally, the top end of the limiting part is bent inward to form a bent portion, and forms an insertion groove with one end of the surrounding plate for the cover plate to be inserted.

[0007] Optionally, the enclosure is rectangular and has corners, and the end face of the corner is not provided with the limiting part.

[0008] Optionally, the enclosure includes a first side plate, a second side plate, a third side plate, and a fourth side plate connected in sequence, with the first side plate facing the third side plate and the second side plate facing the fourth side plate, and the first side plate, the second side plate, and the third side plate being provided with the limiting portion.

[0009] Optionally, both sides of the enclosure have openings, and both ends of the enclosure are provided with the limiting portion.

[0010] Optionally, the housing further includes a base plate, and the enclosure extends vertically from the edge of the base plate.

[0011] Optionally, the wall thickness of the enclosure is D1, the thickness of the limiting part is D2, and the width of the bending part is D3, wherein D1, D2, and D3 satisfy: D2 < D1, and D2 + D3 ≥ D1.

[0012] This utility model also proposes a battery casing assembly, which includes a casing and a cover plate. The casing is used to house the battery cell, and the cover plate is used to seal the casing. The casing is the casing described above.

[0013] Optionally, the cover plate is welded to the enclosure plate.

[0014] This utility model also proposes a battery comprising a battery cell and a battery casing assembly as described above, wherein the battery cell is disposed in the battery casing assembly.

[0015] This utility model is used in the housing for accommodating battery cells. The surrounding plates form an open accommodating cavity to accommodate the battery cells. A limiting part is provided at one end edge of the surrounding plates. When the cover plate is assembled with the housing to seal the open opening, it is circumferentially limited by the limiting part provided on the surrounding plates and is located within the edge range of the frame. That is, the cover plate will not exceed the edge of the frame, which improves the assembly accuracy, ensures the product appearance and user feel, and does not lead to an increase in product size, which is in line with the trend of thinner and lighter consumer products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the assembly of the housing and cover plate for accommodating the battery cell in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the disassembled housing and cover plate used to house the battery cell in the embodiment; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 1 A schematic diagram of the structure of the housing used to house the battery cell in the embodiment; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the disassembled shell and cover plate used to house the battery cell in one embodiment of the present invention; Explanation of icon numbers: The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0017] The solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0020] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0021] This utility model embodiment provides a housing 100 for accommodating battery cells, referring to... Figure 1 and Figure 2 The housing 100 includes: The enclosure 110 forms an open receiving cavity 110Q. One end edge of the enclosure 110 is provided with a limiting part 111, which is used to circumferentially limit the cover plate 200. The cover plate 200 is used to seal the open cavity.

[0022] Specifically, the enclosure 110 may include two long side plates and two short side plates, which are connected in sequence to form a rectangular, open accommodating cavity 110Q. Of course, it can also be designed into other shapes, such as circular, trapezoidal, or hexagonal, depending on actual needs. The cover 200 matches the shape of the openness and, when placed on the enclosure 110, seals the openness of the accommodating cavity 110Q, forming a complete battery casing structure together with the housing 100, protecting and sealing the internal battery cells. In actual manufacturing, the enclosure 110 of the housing 100 can be made of a high-strength metal material, such as stainless steel, and processed into a cavity structure with a specific shape and size through stamping, forming, and other processes to ensure sufficient strength and rigidity to withstand external impacts and internal pressure. The cover 200 also uses a suitable metal material and is tightly connected to the enclosure 110 through welding, riveting, or other methods to ensure the sealing of the accommodating cavity 110Q.

[0023] A limiting part 111 is disposed on one end edge of the enclosure 110. Its function is to circumferentially limit the cover 200, ensuring that the cover 200 is located within the edge range of the enclosure 110 after assembly with the housing 100. The number of limiting parts 111 can be one or more, and this embodiment does not limit this. The limiting part 111 can be a protrusion structure, a groove structure, or other structural form with limiting function disposed on one end edge of the enclosure 110. For example, the limiting part 111 is a protrusion strip disposed along one end edge of the enclosure 110. The height and width of the protrusion strip are precisely designed to cooperate with the corresponding part of the edge of the cover 200, limiting the movement range of the cover 200; or the limiting part 111 is a groove on one end edge of the enclosure 110, and the edge of the cover 200 can be embedded in the groove, thereby achieving precise positioning.

[0024] During the assembly of the battery casing, the battery cell is placed within the accommodating cavity 110Q formed by the surrounding plate 110 of the casing 100, and then the cover plate 200 is closed onto the surrounding plate 110. At this time, the limiting portion 111 at the edge of the surrounding plate 110 provides a limiting function, cooperating with the edge of the cover plate 200. Taking the limiting portion 111 in the form of a protruding strip as an example, during the closing process, the edge of the cover plate 200 will contact the protruding strip, and the protruding strip will prevent the cover plate 200 from moving outward, thereby precisely limiting the cover plate 200 within the edge range of the surrounding plate 110; if the limiting portion 111 is a groove structure, after the edge of the cover plate 200 is embedded in the groove, the inner wall of the groove constrains the cover plate 200, ensuring that the cover plate 200 does not exceed the edge of the surrounding plate 110.

[0025] In this embodiment, the limiting part 111 provides a clear positioning reference for the installation of the cover plate 200, effectively offsetting the deviations generated during processing and assembly. This allows the cover plate 200 to be accurately installed within the edge range of the enclosure 110, greatly improving the assembly accuracy between the housing 100 and the cover plate 200. Because the cover plate 200 is accurately positioned, the overall outer surface of the battery case structure is flat and regular, avoiding irregular edges caused by the protrusion of the cover plate 200. This not only improves the product's appearance and enhances the user's grip, but also does not increase the product's size, conforming to the trend of thinner and lighter consumer products.

[0026] In some embodiments, refer to Figures 3 to 5 The top of the limiting part 111 is bent inward to form a bending part 112, which forms an insertion groove 110C with one end of the surrounding plate 110 for the cover plate 200 to be inserted. The dimensions of the insertion groove 110C are precisely designed according to the thickness and width of the edge of the cover plate 200 to ensure that the cover plate 200 can be tightly inserted therein. The bending angle of the bending part 112 is optimized, such as 90°, to ensure that sufficient limiting force is provided to the cover plate 200 while facilitating the insertion operation of the cover plate 200. When the cover plate 200 is inserted into the insertion slot 110C, one end of the surrounding plate 110 provides support for the cover plate 200 from below, the limiting part 111 constrains the cover plate 200 from the side, and the bending part 112 limits the edge of the cover plate 200 from above, thereby realizing the three-dimensional limiting of the cover plate 200. Compared with the traditional limiting structure, it can more effectively prevent the cover plate 200 from shifting during the assembly process, which helps to improve the assembly stability and accuracy between the cover plate 200 and the housing 100.

[0027] In some embodiments, refer to Figure 2 The enclosure 110 is rectangular and has corners, with no limiting parts 111 at the corner ends. Specifically, the four corners of the rectangular enclosure 110 have flat end faces without any protrusions, grooves, or other limiting structures. During assembly, the cover 200 is positioned and limited primarily by the limiting parts 111 located at the other parts besides the corner ends. This design optimizes the structure of the enclosure 110 and simplifies the manufacturing process while ensuring the circumferential limiting accuracy of the cover 200.

[0028] In some embodiments, refer to Figure 1 and Figure 2 The enclosure 110 includes a first side plate 1101, a second side plate 1102, a third side plate 1103 and a fourth side plate 1104 connected in sequence. The first side plate 1101 and the third side plate 1103 are opposite to each other, and the second side plate 1102 and the fourth side plate 1104 are opposite to each other. The first side plate 1101, the second side plate 1102 and the third side plate 1103 are provided with limiting parts 111.

[0029] The enclosure 110 is composed of a first side plate 1101, a second side plate 1102, a third side plate 1103, and a fourth side plate 1104 arranged in a rectangular layout. The four side plates are connected end to end to form a receiving cavity 110Q for accommodating components such as battery cells. Alternatively, the third side plate 1103 may be positioned opposite and spaced apart from the first side plate 1101 in the width direction of the enclosure 110; and the fourth side plate 1104 may be positioned spaced apart from the second side plate 1102 in the length direction of the enclosure 110. Each of the first side plate 1101, second side plate 1102, and third side plate 1103 has a limiting portion 111. The top end of each limiting portion 111 is bent inward to form a bent portion 112. The bent portion 112 and the enclosure 110 together form an insertion groove 110C for the cover plate 200 to be inserted. During assembly, the cover plate 200 is introduced from the side where the fourth side plate 1104 of the infinite positioning part 111 is located, and moves along the length direction (or the width direction) of the surrounding plate 110. As the cover plate 200 is pushed forward, its opposite side edges are first inserted into the insertion grooves 110C on the first side plate 1101 and the third side plate 1103. After being pushed into place, the third side edge of the cover plate 200 is finally inserted into the insertion groove 110C on the second side plate 1102. In this way, by utilizing the cooperative limiting effect of the upper positioning parts 111 of the three side plates, the cover plate 200 is precisely fixed within the edge range of the surrounding plate 110.

[0030] The battery casing structure can adopt a double cover plate 200 design, with the two cover plates 200 respectively assembled at opposite ends in the thickness direction of the casing 100, thereby: In some embodiments, refer to Figure 1 and Figure 2 The enclosure 110 has openings on both sides, and limiting parts 111 are provided at both ends of the enclosure 110. Specifically, cover plates 200 can be installed on both sides of the enclosure 110 to cover the corresponding openings. At the same time, the limiting parts 111 at both ends of the enclosure 110 can respectively limit the circumferential movement of their corresponding cover plates 200, so as to achieve a precise fit between the cover plates 200 and the enclosure 110.

[0031] Alternatively, the battery casing structure can also adopt a single cover plate 200 design, which is fitted to one end of the casing 100 in the thickness direction, thereby: In some embodiments, refer to Figure 6 The shell 100 also includes a base plate 120, and a surrounding plate 110 extending vertically from the edge of the base plate 120. Specifically, the base plate 120 serves as the basic component of the shell 100, providing a stable support surface for the entire shell 100. The surrounding plate 110 is formed by extending upward from the edge of the base plate 120 through processes such as stamping and stretching, making the surrounding plate 110 and the base plate 120 a complete integrated structure. A cover plate 200 is installed on one side of the surrounding plate 110 to seal the opening.

[0032] In some embodiments, refer to Figure 5 The wall thickness of the enclosure 110 is D1, the thickness of the limiting part 111 is D2, and the width of the bending part 112 is D3. D1, D2, and D3 satisfy: D2 < D1, and D2 + D3 ≥ D1. During the manufacturing process, the dimensions of the enclosure 110, the limiting part 111, and the bending part 112 are precisely controlled through injection molding, stamping, and other processes to ensure that the relationship D2 < D1 and D2 + D3 ≥ D1 is achieved. The difference in size between D2 and D1 ensures that the limiting part 111131, while fulfilling its limiting function, does not increase the local thickness of the enclosure 110, and also allows the enclosure 110 to bear the load of the cover plate 200 for subsequent welding. Furthermore, the setting of D2 + D3 ≥ D1 allows the bending part 112 to effectively cover the edge of the cover plate 200, ensuring stable limiting of the cover plate 200.

[0033] This utility model embodiment also proposes a battery casing assembly, see reference Figure 1 The battery casing assembly includes a casing 100 and a cover plate 200. The casing 100 is used to house the battery cells, and the cover plate 200 is used to seal the casing 100. The casing 100 is the casing 100 described in the foregoing embodiments. The specific structure of the casing 100 is as described in the above embodiments. Since this battery casing assembly adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0034] In some embodiments, the cover plate 200 is welded to the surrounding plate 110. Specifically, welding processes such as laser welding and resistance welding can be used to connect and fix the cover plate 200 and the surrounding plate 110. Before welding, the cover plate 200 is precisely positioned using the limiting part 111 on the surrounding plate 110 to ensure accurate relative positioning between the cover plate 200 and the surrounding plate 110. During the welding process, welding parameters, such as laser power, welding time, and current intensity, are precisely controlled according to the material characteristics of the cover plate 200 and the surrounding plate 110 to ensure a firm bond at the welded parts. This ensures connection strength while preventing material deformation or damage due to excessive welding heat.

[0035] This utility model embodiment also proposes a battery, which includes a battery cell and a battery casing assembly as described in the foregoing embodiments, with the battery cell disposed within the battery casing assembly. The specific structure of the battery casing assembly is as described in the foregoing embodiments. Since this battery adopts all the technical solutions of all the foregoing embodiments, it possesses at least all the technical effects brought about by the technical solutions of the foregoing embodiments, and will not be elaborated upon here. The battery may be a lithium battery.

[0036] The above description is only a part or preferred embodiment of this utility model. Neither the text nor the drawings should limit the scope of protection of this utility model. All equivalent structural transformations made using the content of this utility model specification and drawings under the overall concept of this utility model, or direct / indirect applications in other related technical fields, are included within the scope of protection of this utility model.

Claims

1. A housing (100) for accommodating a battery cell, characterized in that, The housing (100) includes: A partition (110) is provided to enclose an open receiving cavity (110Q). A limiting part (111) is provided at one end edge of the partition (110). The limiting part (111) is used to circumferentially limit the cover plate (200). The cover plate (200) is used to seal the open cavity.

2. The housing (100) according to claim 1, characterized in that, The top end of the limiting part (111) is bent inward to form a bent part (112), and forms an insertion groove (110C) with one end of the surrounding plate (110) for the cover plate (200) to be inserted.

3. The housing (100) according to claim 2, characterized in that, The enclosure (110) is rectangular and has corners, and the end face of the corner is not provided with the limiting part (111).

4. The housing (100) according to claim 3, characterized in that, The enclosure (110) includes a first side plate (1101), a second side plate (1102), a third side plate (1103), and a fourth side plate (1104) connected in sequence. The first side plate (1101) is opposite to the third side plate (1103), and the second side plate (1102) is opposite to the fourth side plate (1104). The first side plate (1101), the second side plate (1102), and the third side plate (1103) are provided with the limiting part (111).

5. The housing (100) according to claim 2, characterized in that, Both sides of the enclosure (110) are open, and both ends of the enclosure (110) are provided with the limiting part (111).

6. The housing (100) according to claim 2, characterized in that, The housing (100) also includes a base plate (120), and the enclosure (110) extends vertically from the edge of the base plate (120).

7. The housing (100) according to any one of claims 2 to 6, characterized in that, The wall thickness of the enclosure (110) is D1, the thickness of the limiting part (111) is D2, and the width of the bending part (112) is D3. D1, D2 and D3 satisfy: D2 < D1, and D2 + D3 ≥ D1.

8. A battery casing assembly, comprising a casing (100) and a cover plate (200), the casing (100) for accommodating a battery cell, and the cover plate (200) for sealing the casing (100), characterized in that, The housing (100) is the housing (100) as described in any one of claims 1 to 7.

9. The battery casing assembly according to claim 8, characterized in that, The cover plate (200) is welded to the enclosure plate (110).

10. A battery, characterized in that, It includes a battery cell and a battery housing assembly as described in claim 8 or 9, wherein the battery cell is disposed in the battery housing assembly.

Images