Battery shell and battery
By designing a first corner on the lithium battery casing to rupture when the air pressure or temperature reaches a critical value, the problem of high installation accuracy of explosion-proof valves is solved, production costs are reduced and efficiency is improved.
Patent Information
- Application Number
- CN202423121690.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-17
AI Technical Summary
The high installation precision required for existing lithium battery explosion-proof valves leads to low production efficiency and high costs.
Design a battery casing with a first corner and a thickness of h1, where 0.5 ≤ h1/h2 ≤ 0.8, designed to rupture when the air pressure or temperature reaches a critical value, simplifying the production process and reducing the precision requirements of the parts.
This approach achieves the goal of reducing production costs, increasing production efficiency, and decreasing defect rates while ensuring battery safety.
Smart Images
Figure CN223911725U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to new energy technology field, concretely provides a battery shell and battery. BACKGROUND
[0002] With the improvement of people's living standards and the enhancement of environmental protection consciousness, new energy has been developing rapidly, which includes lithium batteries.
[0003] The traditional lithium battery includes a shell, an explosion-proof valve arranged on the shell, the explosion-proof valve is used to break when the air pressure or temperature in the shell reaches a critical value to discharge the gas inside, ensuring the safety of the battery. The existing explosion-proof valve usually needs to be embedded in the through hole of the shell, and then the gap between the edge of the explosion-proof valve and the inner periphery of the through hole is welded to realize the stable connection of the two. However, the cooperation gap between the explosion-proof valve and the through hole needs to be very accurate, which leads to high requirements on the size accuracy of the parts, and thus a lot of defective products are produced, resulting in high production cost.
[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. SUMMARY
[0005] The utility model aims at solving the above technical problems, that is, solving the problem of low production efficiency caused by high installation precision of the existing explosion-proof valve.
[0006] In a first aspect, the utility model provides a battery shell, which comprises a shell, the shell is provided with a first corner, the thickness of the first corner is h1, the wall thickness of the shell is h2, wherein 0.5≤h1 / h2≤0.8.
[0007] In the case of adopting the above technical scheme, the thickness of the first corner is limited, so that the shell breaks when the air pressure reaches the critical value or the temperature reaches the critical value, and the gas inside the shell is discharged in time, ensuring the safety of the battery, and the structure and production process are simple, the explosion-proof valve does not need to be installed into the through hole, the precision requirement of the parts is not high, the defective product rate is low, the production cost is reduced and the production efficiency is improved.
[0008] In the preferred technical scheme of the above battery shell, the first corner is provided with two, three or four.
[0009] In the preferred technical scheme of the above battery shell, the shell further comprises a second corner, the thickness of the second corner is h3, wherein 0.8≤h3 / h2≤1.
[0010] In the preferred technical scheme of the above battery shell, the second corner is provided with two or three.
[0011] In the preferred technical solution of the battery shell, the first angle has an area S, and the shell has a volume V, wherein 1000≤V / S≤10000.
[0012] In the preferred technical solution of the battery shell, the first angle has a radius R, wherein 2mm≤R≤15mm.
[0013] In the preferred technical solution of the battery shell, the battery shell further comprises a cover plate, the shell is provided with an opening, and the cover plate covers the opening.
[0014] In the preferred technical solution of the battery shell, the shell is provided with two, and the battery shell further comprises a partition plate, which is arranged between the two shells.
[0015] In the preferred technical solution of the battery shell, the shell is provided with a protruding portion, the protruding portion is fixedly connected with the edge of the partition plate, and the shell and the protruding portion are integrally formed.
[0016] In a second aspect, the utility model also provides a battery, the battery includes the battery shell. BRIEF DESCRIPTION OF DRAWINGS
[0017] The preferred embodiments of the utility model will be described below with reference to the drawings, in which:
[0018] Figure 1 is the perspective view of the shell of the battery shell of the utility model;
[0019] Figure 2 is Figure 1 the perspective view of another angle of the shell of the utility model;
[0020] Figure 3 is Figure 1 the top view of the shell of the utility model;
[0021] Figure 4 is Figure 3 the partial sectional view of the shell of the utility model along A-A line;
[0022] Figure 5 is the perspective view of the shell of the battery shell of the utility model;
[0023] Figure 6 is Figure 5 the partial enlarged view of B part of the shell;
[0024] Figure 7 is the explosion view of the first embodiment of the battery of the utility model;
[0025] Figure 8is the explosion drawing of the second embodiment of the battery of the utility model;
[0026] Figure 9 is Figure 8 the utility model discloses a battery's perspective view as shown.
[0027] List of reference signs:
[0028] 100, shell;1, bottom wall;2, first side wall;3, second side wall;4, protruding part;5, first angle;6, second angle;200, cover plate;300, battery cell;400, partition. DETAILED DESCRIPTION
[0029] The preferred embodiments of the utility model will be described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.
[0030] It should be noted that in the description of the utility model, the terms "inner", "outer", "upper", "lower", "top", "bottom", "left", "right", "front", "back" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0031] In addition, it should also be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0032] In one embodiment, as Figures 1 to 6 shown, the battery shell of the utility model comprises a shell 100, the shell 100 is provided with a first angle 5, the thickness of the first angle 5 is h1, the wall thickness of the shell 100 is h2, wherein 0.5≤h1 / h2≤0.8.
[0033] Preferably, the shell 100 can be a cuboid, also can be a cylinder or other geometric body;Specifically, the shell 100 can be an aluminum shell, also can be a steel shell or other materials, etc.,Here is not limited specifically.
[0034] More preferably, the shell 100 comprises a bottom wall 1, two first side walls 2 arranged on the bottom wall 1 and opposite in the width direction, two second side walls 3 arranged on the bottom wall 1 and opposite in the length direction, the two first side walls 2 and the two second side walls 3 are arranged alternately around the four sides of the bottom wall 1 in sequence, and the first side wall 2 is arranged between the two second side walls 3. Preferably, the bottom wall 1, the first side wall 2 and the second side wall 3 are integrally formed, such as stamping forming and the like.
[0035] More preferably, the wall thicknesses of the bottom wall 1, the first side wall 2 and the second side wall 3 are the same, all being h2, thereby facilitating the integrated processing and forming thereof, simplifying the process steps, and improving the production efficiency.
[0036] Further preferably, the shell 100 comprises a first corner 5 arranged between the bottom wall 1, the first side wall 2 and the second side wall 3 to realize the stable connection of the three.
[0037] Furthermore, the first corner 5 can be arranged one, two, three or four, and the more the number of the first corner 5 arranged, the more timely the rupture can be, thereby ensuring the safety of the battery use.
[0038] Further, the thickness of the first corner 5 is h1, and 0.5≤h1 / h2≤0.8, specifically, the ratio of h1 / h2 can be 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.6, 0.7, 0.8, etc., and the specific value thereof can be set as needed, which is not limited here.
[0039] It should be noted that by thinning the thickness of the first corner 5 and limiting the thickness as described above, the shell 100 can smoothly rupture when the pressure or temperature inside the shell 100 reaches a critical value, and the gas inside the shell 100 can be discharged in time, thereby playing a role similar to an explosion-proof valve, ensuring the safety of the battery use, and the production process is simple, and the parts do not have high dimensional accuracy requirements, thereby reducing the production cost.
[0040] In an embodiment, the first corner 5 is provided with two, three or four.
[0041] Preferably, the first corner 5 can be arranged two, and the two first corners 5 are arranged at the two ends in the width direction or the length direction of the shell 100, or the two first corners 5 are arranged at the two ends of the diagonal line of the bottom wall 1 of the shell 100, thereby meeting the explosion-proof requirements of different areas and improving the safety of use.
[0042] More preferably, the first corner 5 can be arranged three, and the three first corners 5 are arranged in sequence, thereby meeting the explosion-proof requirements of the three end corners inside the shell 100 and enhancing the safety of use.
[0043] More preferably, four first corners 5 are provided, i.e. the four end corners of the shell 100 are all first corners 5, so that the overall explosion-proof requirement of the shell 100 can be met, and the safety of the shell 100 is the highest.
[0044] It should be noted that the specific number and arrangement position of the first corners 5 can be set as needed, which is not limited here.
[0045] In an embodiment, the shell 100 further comprises a second corner 6, and the thickness of the second corner 6 is h3, wherein 0.8≤h3 / h2≤1, as shown in the following formula. Figure 5
[0046] Preferably, the second corner 6 is arranged between the bottom wall 1, the first side wall 2 and the third side wall 3, and the first corner 5 and the second corner 6 constitute all the end corners of the shell 100. The second corner 6 is used to enhance the structural strength of the shell 100 and prolong the service life of the shell 100.
[0047] More preferably, the thickness of the second corner 6 is greater than the thickness of the first corner 5, so that when the air pressure or temperature in the shell 100 reaches a critical value, the first corner 5 is broken first and the second corner 6 is not broken, so that not only the safety of use is ensured through the first corner 5, but also the stability of the structure is ensured through the second corner 6.
[0048] More preferably, the thickness of the second corner 6 is h3, and 0.8≤h3 / h2≤1. Specifically, the ratio of h3 / h2 can be 0.8, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.9, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, 1, etc. The specific ratio value can be set as needed, which is not limited here.
[0049] It should be noted that the thickness of the second corner 6 is limited as described above, so that the thickness of the second corner 6 is greater than the first corner 5, so that the first corner 5 functions as an explosion-proof valve, and the structural strength of the shell 100 can be improved through the second corner 6, prolonging the service life thereof.
[0050] In an embodiment, the second corner 6 is provided with two or three.
[0051] Preferably, two second corners 6 can be provided, such as being arranged at the two ends in the length direction of the shell 100 or the two ends in the width direction, or being arranged at the two ends of the diagonal line of the bottom wall 1, so that the requirement of the enhanced structure in different areas can be met, and the overall structure is more stable.
[0052] More preferably, three second corners 6 are provided, and the three second corners 6 are arranged adjacent to each other in sequence, thereby enhancing the structural strength at the three end corners of the outer shell 100 and further enhancing the structural stability of the outer shell 100.
[0053] In one embodiment, the area of the first corner 5 is S, and the volume of the outer shell 100 is V, where 1000 ≤ V / S ≤ 10000. Figure 5 and Figure 6 As shown.
[0054] Preferably, the first corner 5 is an arc surface, thereby connecting the bottom wall 1, the first side wall 2 and the second side wall 3, so that the three are stably connected.
[0055] More preferably, the area S of the first angle 5 is the area of the outer surface of the arc, such as... Figure 6 The area of the diagonal line region is the explosion-proof area to meet the explosion-proof requirements of the enclosure 100.
[0056] More preferably, the volume V of the outer casing 100 is the product of its length, width, and height, which represents the volume occupied by the outer casing 100, and can also represent the volume of the battery cell it contains.
[0057] More preferably, 1000≤V / S≤10000. Specifically, V / S can be 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, 10000, etc. The specific ratio can be set as needed and is not specifically limited here.
[0058] It should be noted that the area S of the first corner 5 mentioned above is in square millimeters, and the volume V of the outer shell 100 mentioned above is in cubic millimeters.
[0059] In one embodiment, the radius of the first angle 5 is R, where 2mm ≤ R ≤ 15mm.
[0060] Preferably, the first corner 5 is arc-shaped, and the radius of the first corner 5 is R, where 2mm≤R≤15mm. Specifically, R can be 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, etc. Users can choose to set it according to their needs, and no specific limitation is made here.
[0061] It should be noted that the size of the radius R of the first angle 5 is limited, so that the connection of the bottom wall 1, the first side wall 2 and the second side wall 3 can be realized, and the shell 100 can be smoothly broken when the air pressure or temperature in the shell 100 reaches the critical value, thereby ensuring the normal operation of the explosion-proof function.
[0062] In an embodiment, the battery shell further comprises a cover plate 200, the shell 100 is provided with an opening, and the cover plate 200 covers the opening, as shown in Figure 7 .
[0063] Preferably, the opening is arranged opposite to the bottom wall 1 of the shell 100, and the opening is in communication with the internal space of the shell 100, so that the battery cell 300 can be conveniently placed into the shell 100 through the opening.
[0064] More preferably, the shape of the cover plate 200 is matched with the shape of the opening, so that the cover plate 200 can block the opening.
[0065] Further preferably, the shell 100 is provided with a protruding portion 4 surrounding the opening, and the protruding portion 4 is fixedly connected with the end of the first side wall 2 and the second side wall 3 away from the bottom wall 1, respectively, and the protruding portion 4 is used for fixedly connecting with the cover plate 200, such as welding, so as to realize the fixed connection of the cover plate 200 and the shell 100, and block the opening.
[0066] In an embodiment, the shell 100 is provided with two, and the battery shell further comprises a partition plate 400, and the partition plate 400 is arranged between the two shells 100, as shown in Figure 8 and Figure 9 .
[0067] Preferably, the two shells 100 are arranged opposite to each other, so that the openings of the two shells 100 are opposite to each other, thereby forming a closed space for accommodating the battery cell 300.
[0068] More preferably, the shape of the partition plate 400 is matched with the shape of the shell 100, so as to block the opening of the shell 100, and the partition plate 400 is arranged between the two shells 100 and opposite to the openings of the two shells 100, so as to simultaneously block the openings of the two shells 100, and form a closed cavity between the shell 100 and the partition plate 400 for accommodating the battery cell 300.
[0069] In an embodiment, the shell 100 is provided with a protruding portion 4, the protruding portion 4 is fixedly connected with the edge of the partition plate 400, and the shell 100 is integrally formed with the protruding portion 4.
[0070] Preferably, the protruding portion 4 is arranged around the opening of the shell 100, and the protruding portion 4 is fixedly connected with the end of the first side wall 2 and the second side wall 3 away from the bottom wall 1, respectively, so as to facilitate the overall fixed connection with the partition plate 400.
[0071] More preferably, the protrusion 4 is integrally formed with the shell 100, thereby simplifying the production process and improving the production efficiency.
[0072] Still more preferably, the protrusion 4 abuts against and is fixedly connected with the edge of the partition plate 400, such as welding, thereby improving the structural strength and realizing the sealing of the two.
[0073] In one embodiment, the utility model also provides a battery, the battery includes the battery shell above-mentioned.
[0074] As shown in the figure, Figure 7 In the embodiment, the battery includes a shell 100, a cover plate 200 and a battery cell 300, the shell 100 has an opening and a protrusion 4 arranged around the opening, the cover plate 200 covers the opening and is fixedly connected with the protrusion 4, such as welding, thereby not only realizing the stable connection of the two, but also realizing the sealing of the two, preventing the leakage of electrolyte in the shell 100. The battery cell 300 is in the closed cavity between the shell 100 and the cover plate 200.
[0075] As shown in the figure, Figure 8 And Figure 9 In the embodiment, the battery includes two shells 100, a partition plate 400 between the two shells 100 and a battery cell 300 arranged between the shell 100 and the partition plate 400. The shell 100 has an opening and a protrusion 4 arranged around the opening, the partition plate 400 is opposite to the openings of the two shells 100 and simultaneously blocks the openings of the two shells 100, so as to form a closed cavity between the shell 100 and the partition plate 400, the battery cell 300 is provided with two and is respectively accommodated in the two cavities, the protrusion 4 abuts against and is fixedly connected with the partition plate 4, such as welding, thereby not only realizing the stable connection of the three, but also realizing the sealing of the three, preventing the leakage of electrolyte in the cavity.
[0076] Those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means to be within the scope of the application and form different embodiments. For example, in the claims of the application, any one of the claimed embodiments can be used in any combination.
[0077] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without departing from the principles of the utility model, and the technical scheme after the changes or replacements will fall within the protection scope of the utility model.
Claims
1. A battery case characterized by comprising: The battery shell comprises a shell, the shell is provided with a first corner, the thickness of the first corner is h1, the wall thickness of the shell is h2, wherein 0.5≤h1 / h2≤0.
8.
2. The battery case according to claim 1, wherein The first corner is provided with two, three or four.
3. The battery case of claim 1, wherein, The shell further comprises a second corner, the thickness of the second corner is h3, wherein 0.8≤h3 / h2≤1.
4. The battery case according to claim 3, characterized by The second corner is provided with two or three.
5. The battery case of claim 1, wherein, The area of the first corner is S, the volume of the shell is V, wherein 1000≤V / S≤10000.
6. The battery case of claim 1, wherein, The radius of the first corner is R, wherein 2mm≤R≤15mm.
7. The battery case of claim 1, wherein, The battery shell further comprises a cover plate, the shell is provided with an opening, and the cover plate covers the opening.
8. The battery case of claim 1, wherein, The shell is provided with two, the battery shell further comprises a partition plate, and the partition plate is arranged between the two shells.
9. The battery case of claim 8, wherein, The shell is provided with a protruding portion, the protruding portion is fixedly connected with the edge of the partition plate, and the shell and the protruding portion are integrally formed.
10. A battery, characterized by The battery shell comprises a shell, the shell is provided with a first corner, the thickness of the first corner is h1, the wall thickness of the shell is h2, wherein 0.5≤h1 / h2≤0.
8. The first corner is provided with two, three or four. The shell further comprises a second corner, the thickness of the second corner is h3, wherein 0.8≤h3 / h2≤1. The second corner is provided with two or three. The area of the first corner is S, the volume of the shell is V, wherein 1000≤V / S≤10000. The radius of the first corner is R, wherein 2mm≤R≤15mm. The battery shell further comprises a cover plate, the shell is provided with an opening, and the cover plate covers the opening. The shell is provided with two, the battery shell further comprises a partition plate, and the partition plate is arranged between the two shells. The shell is provided with a protruding portion, the protruding portion is fixedly connected with the edge of the partition plate, and the shell and the protruding portion are integrally formed. The battery shell comprises a shell, the shell is provided with a first corner, the thickness of the first corner is h1, the wall thickness of the shell is h2, wherein 0.5≤h1 / h2≤0.8.