Shell and battery monomer with same
By setting a flow channel on the inner wall of the housing accommodating chamber of the battery cell, the problems of low infiltration efficiency and overflow of the electrolyte are solved, and a more efficient liquid injection process and better safety are achieved.
Patent Information
- Application Number
- CN202420334531.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-22
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-02-22
AI Technical Summary
When the existing battery cell is injected, due to the long electrode sheet and the slow flow rate of the electrolyte, the electrolyte is infiltrated with the low efficiency of the electrode sheet, and the electrolyte may overflow and contaminate the surrounding environment.
A flow guide groove is provided on the inner wall of the housing cavity, and the electrolyte can flow along the flow guide groove to the bottom of the housing, thereby improving the flow rate and wetting efficiency of the electrolyte and preventing the electrolyte from overflowing.
By setting up a flow diversion tank, the efficiency of the infiltrating electrode sheet of the electrolyte is significantly improved, the problem of electrolyte overflow is avoided, and the liquid injection efficiency and safety of the battery cell are improved.
Smart Images
Figure CN222530776U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery monomer assembly manufacturing, in particular to a shell and a battery monomer having the same. Background Art
[0002] In the existing battery cell, when liquid is injected from the injection port into the containing cavity in the shell, it takes a long time for the electrolyte to flow to the bottom of the electrode piece due to the long electrode piece and the slow flow rate of the electrolyte in the containing cavity, which affects the efficiency of the electrolyte infiltrating the electrode piece. At the same time, when a large amount of electrolyte is injected, the electrolyte will overflow from the injection port, causing pollution around the injection port. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a shell, which can improve the efficiency of wetting the pole piece.
[0004] The utility model also provides a battery monomer having the shell.
[0005] According to the shell of the embodiment of the utility model, a accommodating cavity is formed in the shell, and the accommodating cavity has a first wall and a second wall arranged opposite to each other in a first direction, a liquid injection port penetrating the first wall is formed on the shell, and a guide groove extending along the first direction is formed on the inner wall of the accommodating cavity.
[0006] According to the shell of the utility model, a guide groove is arranged on the inner wall of the accommodating cavity, and the electrolyte can flow along the guide groove to the bottom of the shell, thereby improving the flow speed of the electrolyte in the accommodating cavity, thereby improving the efficiency of the electrolyte infiltrating the electrode, and at the same time, it can effectively solve the problem of electrolyte overflow from the injection port.
[0007] According to some embodiments of the present utility model, the guide groove is formed by being recessed from the inner wall of the accommodating cavity toward the outer side of the shell.
[0008] According to some embodiments of the present invention, in the direction from the inner wall of the accommodating cavity toward the outer side of the shell, the depth of the guide groove is 0.15mm-0.5mm, and / or the depth of the guide groove is half of the thickness of the shell wall.
[0009] According to some embodiments of the utility model, in the width direction of the guide groove, the inner wall of the guide groove extends along an arc; or, the guide groove has a first side wall and a second side wall arranged relatively to each other in the width direction of the guide groove, and in the direction from the opening of the guide groove toward the bottom, the first side wall and the second side wall extend toward each other along a straight line.
[0010] According to some embodiments of the present invention, in the first direction, the length of the guide groove is greater than or equal to half of the length of the shell.
[0011] According to some embodiments of the present invention, a plurality of guide grooves are provided, and the plurality of guide grooves are arranged in sequence along the circumference of the first wall.
[0012] According to some optional embodiments of the present invention, the distance between two adjacent guide grooves is greater than or equal to 1 mm.
[0013] According to some embodiments of the present invention, in the circumferential direction of the first wall, at least two adjacent guide grooves are arranged at intervals, and / or at least two adjacent guide grooves have side walls connected.
[0014] According to some embodiments of the present invention, the wall thickness of the shell is 0.3mm-1mm.
[0015] A battery cell according to an embodiment of the second aspect of the utility model includes a housing according to the first aspect of the utility model.
[0016] According to the battery cell of the utility model, by setting the shell of the above-mentioned first aspect embodiment, a guide groove is set on the inner wall of the accommodating cavity, and the electrolyte can flow along the guide groove to the bottom of the shell, thereby improving the flow speed of the electrolyte in the accommodating cavity, thereby improving the efficiency of the electrolyte infiltrating the electrode plate, and at the same time, it can effectively solve the problem of electrolyte overflow from the injection port.
[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic diagram of an angle of an embodiment of a housing according to an embodiment of the first aspect of the utility model;
[0019] Figure 2 yes Figure 1 A schematic diagram of another angle of the housing shown in FIG.
[0020] Figure 3 yes Figure 1 A schematic diagram of another embodiment of a housing is shown in FIG.
[0021] Reference numerals:
[0022] 100. Shell;
[0023] 10. Accommodating cavity;
[0024] 20. Guide groove; 21. First side wall; 22. Second side wall. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0026] Please refer to the following Figure 1-Figure 3 A housing 100 according to an embodiment of the present invention is described.
[0027] Reference Figure 1 and Figure 2 According to the housing 100 of the embodiment of the present utility model, a housing cavity 10 is formed in the housing 100, and the housing cavity 10 has a first direction (such as Figure 1 The shell 100 has a first wall and a second wall that are relatively arranged in the up and down direction (as shown in the figure), a liquid injection port penetrating the first wall is formed on the shell 100, and a guide groove 20 extending along the first direction is formed on the inner wall of the accommodating cavity 10.
[0028] For example, Figure 1 and Figure 2 As shown, the top wall of the accommodating cavity 10 is the first wall, the bottom wall of the accommodating cavity 10 is the second wall, the injection port penetrates the first wall along the up-down direction, the guide groove 20 extends along the up-down direction, and the injection direction is the up-down direction.
[0029] The housing 100 of the utility model is provided with a guide groove 20 on the inner wall of the accommodating cavity 10. The extension direction of the guide groove 20 is parallel to the injection direction. When the electrolyte is injected into the housing 100 from the injection port, the electrolyte can flow along the guide groove 20 to the bottom of the housing 100, thereby increasing the flow speed of the electrolyte in the accommodating cavity 10, thereby increasing the efficiency of the electrolyte infiltrating the electrode. At the same time, the guide groove 20 can increase the flow cross-section of the electrolyte and increase the flow rate of the electrolyte. Even if too much electrolyte is injected, it will not overflow from the injection port, thereby effectively solving the problem of electrolyte overflow. In addition, when the battery cell has thermal runaway, the gas in the housing 100 can flow along the guide groove 20, thereby preventing the gas from being unable to be discharged from the accommodating cavity 10, causing the thermal runaway of the battery cell to be further aggravated, thereby improving the safety of the battery cell.
[0030] According to the shell 100 of the embodiment of the utility model, a guide groove 20 is arranged on the inner wall of the accommodating cavity 10, and the electrolyte can flow along the guide groove 20 to the bottom of the shell 100, thereby improving the flow speed of the electrolyte in the accommodating cavity 10, thereby improving the efficiency of the electrolyte infiltrating the electrode, and at the same time, it can effectively solve the problem of electrolyte overflow from the injection port.
[0031] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 The guide groove 20 is formed by being recessed from the inner wall of the accommodating cavity 10 toward the outer side of the housing 100. Thus, the guide groove 20 is formed on the inner wall of the accommodating cavity 10, and no additional guide groove 20 is required. This structure is reasonably arranged, which facilitates the flow of electrolyte in the guide groove 20. At the same time, the guide groove 20 can increase the flow cross section of the electrolyte, thereby improving the flow rate of the electrolyte in the accommodating cavity 10.
[0032] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , in the direction from the inner wall of the accommodating cavity 10 toward the outer side of the housing 100, the depth of the guide groove 20 is 0.15mm-0.5mm. Thus, limiting the depth of the guide groove 20 can prevent the guide groove 20 from being too deep to affect the strength of the housing 100, and can also prevent the guide groove 20 from being too shallow to affect the guide effect of the guide groove 20.
[0033] For example, Figure 1 and Figure 2 As shown, the depth of the guide groove 20 can be: 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm or 0.5mm.
[0034] Furthermore, if Figure 1 and Figure 2 As shown, the depth of the guide groove 20 is half of the wall thickness of the housing 100. Thus, the guide effect of the guide groove 20 can be ensured, and the strength of the housing 100 can be prevented from being affected by the excessive depth of the guide groove 20.
[0035] According to some embodiments of the present invention, referring to Figure 2 In the width direction of the flow guide groove 20, the inner wall of the flow guide groove 20 extends along an arc. Therefore, the inner wall of the flow guide groove 20 extending along the arc is smooth, which can facilitate the flow of the electrolyte, thereby improving the efficiency of the electrolyte infiltrating the electrode. Figure 2 As shown, the inner wall of the guide groove 20 is a semicircular arc.
[0036] Furthermore, if Figure 3 As shown, the guide groove 20 has a first side wall 21 and a second side wall 22 arranged opposite to each other in the width direction of the guide groove 20, and the first side wall 21 and the second side wall 22 extend toward each other along a straight line in the direction from the opening of the guide groove 20 toward the bottom. Thus, the first side wall 21 and the second side wall 22 define the guide groove 20, which can facilitate the flow of electrolyte in the guide groove 20. At the same time, the first side wall 21 and the second side wall 22 extending in a straight line have a simple structure and are easy to process, thereby improving the processing efficiency.
[0037] For example, Figure 3 As shown, the first side wall 21 and the second side wall 22 extend obliquely, extend toward each other and are connected, and form a V-shaped guide groove 20 .
[0038] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , in the first direction (such as Figure 1 The length of the guide groove 20 is greater than or equal to one half of the length of the housing 100. Thus, limiting the length of the guide groove 20 can prevent the guide groove 20 from being too long and affecting the strength of the housing 100, and can also prevent the guide groove 20 from being too short and affecting the diversion effect.
[0039] For example, Figure 1 and Figure 2 As shown, the length of the guide groove 20 can be one half, two thirds or five sixths of the length of the housing 100 .
[0040] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , multiple flow guide grooves 20 are provided, that is, the number of flow guide grooves 20 can be two, three or four or more, and multiple flow guide grooves 20 are arranged in sequence along the circumference of the first wall. Thus, multiple flow guide grooves 20 can increase the flow cross-section of the electrolyte, thereby further improving the flow rate of the electrolyte in the accommodation cavity 10. At the same time, multiple flow guide grooves 20 are arranged in sequence, and this structural arrangement is reasonable, which facilitates the flow of the electrolyte in the flow guide grooves 20.
[0041] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 2 , the distance between two adjacent guide grooves 20 is greater than or equal to 1 mm. Thus, the width of the guide groove 20 can be ensured, and the adjacent guide grooves 20 can be prevented from influencing each other, thereby ensuring the guiding effect of the guide groove 20.
[0042] For example, Figure 1 and Figure 2 As shown, the distance between two adjacent guide grooves 20 may be 1 mm, 2 mm, 3 mm, 4 mm or 5 mm.
[0043] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 In the circumferential direction of the first wall, at least two adjacent guide grooves 20 are arranged at intervals. Therefore, this structural arrangement is reasonable, which facilitates the electrolyte to flow in the guide grooves 20, thereby ensuring the efficiency of the electrolyte infiltrating the electrode sheet.
[0044] Furthermore, if Figure 1 and Figure 2 As shown, the side walls of at least two adjacent guide grooves 20 are connected, that is, the side walls of two, three, four or more adjacent guide grooves 20 are connected. Thus, the guide grooves 20 with connected side walls can be processed at one time, thereby improving processing efficiency and saving processing time.
[0045] According to some embodiments of the present invention, referring to Figure 1 and Figure 2 , the wall thickness of the housing 100 is 0.3mm-1mm. Thus, it is possible to prevent the housing 100 from being too thin to affect the depth of the guide groove 20, thereby ensuring the guide effect of the guide groove 20, and at the same time, it is possible to prevent the housing 100 from being too thin to affect the strength of the housing 100. In addition, it is possible to prevent the housing 100 from being too thick to affect the volume of the accommodating cavity 10, thereby ensuring the space in the accommodating cavity 10.
[0046] According to the battery cell of the second embodiment of the utility model, Figure 1 and Figure 2 , including the shell 100 of the first aspect of this embodiment.
[0047] According to the battery cell of the embodiment of the utility model, by setting the shell 100 of the above-mentioned first aspect embodiment, a guide groove 20 is set on the inner wall of the accommodating cavity 10, and the electrolyte can flow along the guide groove 20 to the bottom of the shell 100, thereby improving the flow speed of the electrolyte in the accommodating cavity 10, thereby improving the efficiency of the electrolyte infiltrating the electrode, and at the same time, it can effectively solve the problem of electrolyte overflow from the injection port.
[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0050] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0052] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A housing, characterized in that: A accommodating cavity is formed in the shell, and the accommodating cavity has a first wall and a second wall arranged opposite to each other in a first direction. A liquid injection port penetrating the first wall is formed on the shell, and a guide groove extending along the first direction is formed on the inner wall of the accommodating cavity.
2. The housing according to claim 1, characterized in that The guide groove is formed by being recessed from the inner wall of the accommodating cavity toward the outer side of the shell.
3. The housing according to claim 1, characterized in that In the direction from the inner wall of the accommodating cavity toward the outer side of the shell, the depth of the guide groove is 0.15mm-0.5mm, And / or, the depth of the guide groove is half of the thickness of the shell wall.
4. The housing according to claim 1, characterized in that In the width direction of the guide groove, the inner wall of the guide groove extends along an arc line; or, The guide groove has a first side wall and a second side wall which are arranged opposite to each other in the width direction of the guide groove. In a direction from the opening of the guide groove toward the bottom, the first side wall and the second side wall extend toward each other along a straight line.
5. The housing according to claim 1, characterized in that In the first direction, the length of the guide groove is greater than or equal to half of the length of the shell.
6. The housing according to any one of claims 1 to 5, characterized in that: A plurality of guide grooves are provided, and the plurality of guide grooves are arranged in sequence along the circumferential direction of the first wall.
7. The housing according to claim 6, characterized in that The distance between two adjacent guide grooves is greater than or equal to 1 mm.
8. The housing according to claim 6, characterized in that In the circumferential direction of the first wall, at least two adjacent guide grooves are arranged at intervals, and / or at least two adjacent guide grooves have side walls connected.
9. The housing according to claim 1, characterized in that: The wall thickness of the shell is 0.3mm-1mm.
10. A battery cell, characterized in that: Comprising a housing according to any one of claims 1-9.