Battery shell and battery
The battery shell uses a high-temperature-resistant insulation component within a recessed design to maintain insulation and safety by preventing short circuits and leakage, addressing the melting issue of plastic insulation at high temperatures.
Patent Information
- Application Number
- CN202421922148.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-09
AI Technical Summary
The existing battery case has a low melting point under high temperature conditions, resulting in failure of insulation function, which can easily cause short circuits and poor safety.
A combination of high-temperature resistant insulating parts and plastic insulating parts is adopted. The plastic insulating parts is equipped with a mounting groove to accommodate high-temperature resistant insulating parts to ensure that the insulation function can still be maintained at high temperatures.
It improves the insulation performance of the battery under high temperature conditions, reduces the risk of short circuit, enhances battery safety, and expands the scope of application.
Smart Images
Figure CN223109182U_ABST
Abstract
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] The battery casing has the functions of insulation, sealing, current conduction, pressure relief and fuse protection. The current conduction is achieved by welding the poles on the battery casing to the pole ears of the battery cell pole group, thereby realizing the current conduction function. The insulation function is achieved by arranging plastic parts outside the poles to avoid contact between the poles and the casing, thereby realizing the insulation function.
[0003] Among them, the insulation of the pole is achieved by sleeved plastic parts on the outside of the pole, which has a major disadvantage. After the battery is used in a long cycle, the internal temperature will gradually increase, causing the internal heat to be gradually transferred to the plastic parts. Since the melting point of the plastic parts is low and cannot withstand excessively high temperatures, the plastic parts will melt at high temperatures, causing the plastic parts to lose their insulation function on the pole, exposing the pole, causing the pole to come into direct contact with the shell, thereby causing a short circuit, and the safety is poor.
[0004] Therefore, there is an urgent need for a battery casing and a battery to solve the above problems. Utility Model Content
[0005] The utility model aims to provide a battery casing and a battery, which have good insulation and high safety in a high temperature environment.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] In one aspect, a battery housing is provided, the battery housing comprising:
[0008] A shell, wherein a storage space is provided in the shell, the storage space is used to accommodate the electrode group, and a mounting through hole communicating with the storage space is opened on the shell;
[0009] A pole, the pole being inserted into the mounting through hole;
[0010] An insulating component, the insulating component includes a high-temperature resistant insulating part and a plastic insulating part, the plastic insulating part is sleeved on the pole and clamped between the surface of the shell facing away from the outside of the pole group and the pole, the plastic insulating part is provided with a first mounting groove on one side of the shell facing the shell, and the high-temperature resistant insulating part is accommodated in the first mounting groove.
[0011] Optionally, a depth dimension of the first mounting groove along the first direction is h, a height dimension of the high temperature resistant insulating member along the first direction is W, and 0.3 mm ≤ W ≤ h is satisfied.
[0012] Optionally, a thickness dimension of the plastic insulating component along the first direction is H, and satisfies 0.3≤(Hh) / H≤0.5.
[0013] Optionally, the pole includes a column portion, a first limiting portion and a second limiting portion, the column portion is inserted into the mounting through hole, the first limiting portion is arranged on a side of the column portion away from the pole group, and the second limiting portion is arranged on the other side of the column portion toward the pole group, and the plastic insulating part is sleeved on the column portion and is clamped between the surface of the shell away from the outside of the pole group and the first limiting portion.
[0014] Optionally, a width dimension of the plastic insulating component along the second direction is D, an overlapping width dimension of the first limiting portion and the plastic insulating component along the second direction is d, and d≥0.5D is satisfied.
[0015] Optionally, the battery housing further comprises an insulating seal, which is sleeved on the column portion and is used to seal the column portion and a gap between the second limiting portion and the shell.
[0016] Optionally, the insulating seal includes a seal body and a sealing flange, the sealing flange is arranged on a side of the seal body close to the second limiting portion and extends in a direction away from the central axis of the pole, the seal body is sleeved on the column portion, and the sealing flange is clamped between the shell and the second limiting portion.
[0017] Optionally, a second mounting groove is formed on the column portion, and the sealing element body is accommodated in the second mounting groove.
[0018] Optionally, the cross-section of the high temperature resistant insulating component is trapezoidal, and the first mounting groove is a dovetail groove that matches the high temperature resistant insulating component.
[0019] On the other hand, a battery is provided, comprising the battery casing as described in any one of the above items.
[0020] Beneficial effects of the utility model:
[0021] The utility model provides a battery shell, which is provided with a first mounting groove on a plastic insulating member located between a surface of a shell away from the outer side of a pole group and a pole, and a high temperature resistant insulating member is accommodated in the first mounting groove. On the one hand, the high temperature resistant insulating member can be protected by the plastic insulating member with a certain elasticity to avoid damage to the high temperature resistant insulating member when the battery shell is assembled. On the other hand, under high temperature conditions, when the plastic insulating member melts, the high temperature resistant insulating member can still ensure the insulation function of the pole, thereby reducing the risk of short circuit due to poor insulation and improving safety.
[0022] The present utility model also provides a battery. By applying the above-mentioned battery housing, the battery still has good insulation performance under high-temperature conditions, which not only enhances the safety of the battery but also expands the applicable range of the battery. Description of the Drawings
[0023] Figure 1 is a structural exploded view of the battery housing provided by the present utility model;
[0024] Figure 2 is a partial structural sectional view of the battery housing provided by the present utility model;
[0025] Figure 3 is Figure 2 an enlarged view of the structure of part A in
[0026] Figure 4 a schematic structural view of the pole column in the battery housing provided by the present utility model;
[0027] Figure 5 a schematic structural view of the plastic insulating part in the battery housing provided by the present utility model.
[0028] In the figure:
[0029] 1. Housing; 11. Installation through-hole;
[0030] 2. Pole column; 21. Column part; 22. First limiting part; 23. Second limiting part; 24. Second installation groove;
[0031] 3. Insulation assembly; 31. High-temperature resistant insulating part; 32. Plastic insulating part; 321. First installation groove;
[0032] 4. Insulation seal; 41. Seal body; 42. Sealing flange. Detailed Description of the Preferred Embodiments
[0033] The present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and not for limiting the present utility model. In addition, it should be noted that for the sake of description, only parts related to the present utility model are shown in the drawings rather than all the structures.
[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.
[0036] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.
[0037] The battery housing has the functions of insulation, sealing, current conduction, pressure relief, and fuse protection. The current conduction function is achieved by welding the pole column on the battery housing to the tab of the battery cell group, so as to realize the current conduction function. The insulation function is realized by sleeving a plastic part on the pole column to avoid contact between the pole column and the housing, thus realizing the insulation function.
[0038] Among them, the battery housing realizes the insulation of the pole column by sleeving a plastic part outside the pole column, which has a major drawback. When the battery is used in long-term cycles, the temperature inside it will gradually increase, resulting in the internal heat being gradually transferred to the plastic part. Since the melting point of the plastic part is relatively low and it cannot withstand high temperatures, the plastic part will melt at high temperatures, causing the plastic part to lose its insulation function for the pole column, exposing the pole column and causing the pole column to come into contact with the housing, thereby triggering a short circuit and having poor safety.
[0039] Therefore, in order to improve the insulation of the battery housing under high-temperature conditions and ensure the safety of the battery housing during use, this embodiment provides a battery housing.
[0040] As Figures 1 to 5 shown, the battery housing includes a housing 1, a terminal post 2, and an insulation assembly 3. A storage space is provided inside the housing 1 for accommodating the electrode group. An installation through-hole 11 communicating with the storage space is provided on the housing 1. The terminal post 2 is inserted into the installation through-hole 11. The insulation assembly 3 includes a high-temperature resistant insulation member 31 and a plastic insulation member 32. The plastic insulation member 32 is sleeved on the terminal post 2 and is clamped between the surface of the housing 1 facing away from the outside of the electrode group and the terminal post 2. A first installation groove 321 is provided on the side of the plastic insulation member 32 facing the housing 1, and the high-temperature resistant insulation member 31 is accommodated in the first installation groove 321.
[0041] By providing a first installation groove 321 on the plastic insulation member 32 between the surface of the housing 1 facing away from the outside of the electrode group and the terminal post 2 and accommodating the high-temperature resistant insulation member 31 in the first installation groove 321, on the one hand, the high-temperature resistant insulation member 31 can be protected by the plastic insulation member 32 with certain elasticity to avoid damaging the high-temperature resistant insulation member 31 during the assembly of the battery housing. On the other hand, under high-temperature conditions, when the plastic insulation member 32 melts, the high-temperature resistant insulation member 31 can still ensure the insulation function of the terminal post 2, thereby reducing the risk of short circuit due to poor insulation and improving safety.
[0042] The battery housing can be applied to various different types of batteries, such as cylindrical batteries, blade batteries, or square shell batteries. In this embodiment, the battery housing is applied to a cylindrical battery, and its shape is circular. The high-temperature resistant insulation member 31 can be made of ceramic material or a special silicone with the brand number MKC-65P.
[0043] Optionally, as Figure 3 、 Figure 5 shown, the depth dimension of the first installation groove 321 in the first direction is h, and the height dimension of the high-temperature resistant insulation member 31 in the first direction is W, and 0.3 mm ≤ W ≤ h is satisfied. By limiting the height dimension W of the high-temperature resistant insulation member 31 to satisfy 0.3 mm ≤ W ≤ h, on the one hand, the minimum height of the high-temperature resistant insulation member 31 is limited, so that the high-temperature resistant insulation member 31 has better insulation performance. On the other hand, the maximum height of the high-temperature resistant insulation member 31 is limited, so that the high-temperature resistant insulation member 31 can be accommodated in the first installation groove 321, facilitating the assembly of the plastic insulation member 32 and the high-temperature resistant insulation member 31.
[0044] Furthermore, as Figure 3 、 Figure 5As shown, the thickness dimension of the plastic insulating member 32 along the first direction is H, and satisfies 0.3≤(Hh) / H≤0.5. By limiting the proportional relationship between the thickness dimension H of the plastic insulating member 32 along the first direction and the depth dimension h of the first mounting groove 321 along the first direction, on the one hand, it is ensured that the remaining material of the plastic insulating member 32 after the first mounting groove 321 is opened has sufficient thickness, thereby ensuring the protection of the plastic insulating member 32 to the high temperature resistant insulating member 31, and on the other hand, it is prevented that the size of the plastic insulating member 32 is too large, thereby increasing the external dimensions of the battery shell, resulting in an increase in the overall size of the battery.
[0045] Alternatively, if Figure 1 , Figure 4 As shown, the pole 2 includes a column portion 21, a first limiting portion 22 and a second limiting portion 23, the column portion 21 is inserted into the mounting through hole 11, the first limiting portion 22 is arranged on the side of the column portion 21 away from the pole group, and the second limiting portion 23 is arranged on the other side of the column portion 21 facing the pole group, and the plastic insulating member 32 is sleeved on the column portion 21 and is sandwiched between the surface of the housing 1 away from the outside of the pole group and the first limiting portion 22. By inserting the column portion 21 into the mounting through hole 11, and arranging the first limiting portion 22 on the side of the column portion 21 away from the pole group, and arranging the second limiting portion 23 on the other side of the column portion 21 facing the pole group, the first limiting portion 22 and the second limiting portion 23 are respectively located on the inner and outer sides of the housing 1, thereby limiting the pole 2.
[0046] In this embodiment, the pole 2 is manufactured by an integrated molding process so as to simultaneously obtain the column portion 21, the first limiting portion 22 and the second limiting portion 23. In other embodiments, a welding process may also be used to weld the first limiting portion 22 and the second limiting portion 23 to both sides of the column portion 21.
[0047] Alternatively, if Figure 3 As shown, the width dimension of the plastic insulating member 32 along the second direction is D, and the overlapping width dimension of the first limiting portion 22 and the plastic insulating member 32 along the second direction is d, and d≥0.5D is satisfied. By limiting the overlapping width dimension d of the first limiting portion 22 and the plastic insulating member 32 along the second direction so that d≥0.5D is satisfied, it is ensured that there is a sufficient contact area between the first limiting portion 22 and the plastic insulating member 32, so as to ensure the fixing effect of the first limiting portion 22 on the plastic insulating member 32, and avoid the plastic insulating member 32 from being dislocated from the first limiting portion 22, thereby causing a short circuit problem caused by poor insulation.
[0048] Alternatively, if Figure 3As shown, the battery housing further includes an insulating seal 4. The insulating seal 4 is sleeved on the columnar portion 21 and is used to seal the gaps between the columnar portion 21 and the second limiting portion 23 and the housing 1. Since the battery interior is filled with electrolyte, by providing the insulating seal 4 sleeved on the columnar portion 21 on the battery housing, on the one hand, it achieves a sealing effect to prevent electrolyte leakage from the battery housing, and on the other hand, it cooperates with the insulating component 3 to enhance the insulation effect.
[0049] Furthermore, as Figure 3 shown, the insulating seal 4 includes a seal body 41 and a sealing flange 42. The sealing flange 42 is provided on the side of the seal body 41 close to the second limiting portion 23 and extends in a direction away from the central axis of the pole column 2. The seal body 41 is sleeved on the columnar portion 21, and the sealing flange 42 is clamped between the housing 1 and the second limiting portion 23. By sleeving the seal body 41 on the columnar portion 21, the gap between the columnar portion 21 and the housing 1 is filled to achieve sealing. On the side of the seal body 41 close to the second limiting portion 23, the sealing flange 42 is formed by extending in a direction away from the central axis of the pole column 2, and the sealing flange 42 is clamped between the housing 1 and the second limiting portion 23, so as to fill the gap between the second limiting portion 23 and the housing 1 to achieve sealing. Thus, the seal body 41 and the sealing flange 42 cooperate with each other to increase the sealing area and improve the sealing effect.
[0050] Even further, as Figure 3 、 Figure 4 shown, a second installation groove 24 is formed on the columnar portion 21, and the seal body 41 is received in the second installation groove 24. By forming the second installation groove 24 on the columnar portion 21, on the one hand, after the seal body 41 is received in the second installation groove 24, the seal body 41 and the columnar portion 21 overlap in space, thereby reducing the occupied space, shrinking the external dimensions of the battery housing, and improving the structural compactness. On the other hand, the second installation groove 24 is used to limit the seal body 41, thereby preventing the insulating seal 4 from being misaligned after assembly, resulting in poor sealing and leakage.
[0051] Optionally, as Figure 3 shown, the cross-section of the high-temperature resistant insulating member 31 is trapezoidal, and the first installation groove 321 is a dovetail groove matching the high-temperature resistant insulating member 31. By adopting the high-temperature resistant insulating member 31 with a trapezoidal cross-section and the dovetail groove type first installation groove 321, after the high-temperature resistant insulating member 31 is inserted into the first installation groove 321, it is limited by the structure to prevent the high-temperature resistant insulating member 31 from coming out of the first installation groove 321. When assembling the battery housing, the high-temperature resistant insulating member 31 and the plastic insulating member 32 can be assembled first and then participate in the overall assembly of the battery housing, thereby improving the assembly convenience.
[0052] Among them, the shape of the first installation groove 321 and the high-temperature resistant insulating member 31 are adapted to each other. In other embodiments, the first installation groove 321 may be a rectangular groove, and the cross-section of the high-temperature resistant insulating member 31 may be rectangular, etc. Therefore, the shapes of the first installation groove 321 and the high-temperature resistant insulating member 31 can be adjusted according to requirements.
[0053] In this embodiment, a battery is also provided. The battery includes the above-mentioned battery housing. By applying the above-mentioned battery housing, the battery still has good insulation performance under high-temperature conditions, which not only enhances the safety of the battery but also improves the applicable range of the battery.
[0054] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present utility model, and are not intended to limit the implementation manners of the present utility model. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present utility model. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.
Claims
1. Battery housing, characterized in that, The battery housing includes: A housing (1) having a storage space therein for accommodating a pole group, and an installation through-hole (11) communicating with the storage space is formed on the housing (1); A pole (2) inserted into the installation through-hole (11); An insulating assembly (3) including a high-temperature resistant insulating member (31) and a plastic insulating member (32). The plastic insulating member (32) is sleeved on the pole (2) and is clamped between the surface of the housing (1) facing away from the outside of the pole group and the pole (2). A first installation groove (321) is formed on one side of the plastic insulating member (32) facing the housing (1), and the high-temperature resistant insulating member (31) is accommodated in the first installation groove (321).
2. The battery housing according to claim 1, characterized in that, The depth dimension of the first installation groove (321) in the first direction is h, and the height dimension of the high-temperature resistant insulating member (31) in the first direction is W, and 0.3 mm ≤ W ≤ h is satisfied.
3. The battery housing according to claim 2, characterized in that, The thickness dimension of the plastic insulating member (32) in the first direction is H, and 0.3 ≤ (H - h) / H ≤ 0.5 is satisfied.
4. The battery housing according to claim 1, characterized in that, The pole (2) includes a column body portion (21), a first limiting portion (22), and a second limiting portion (23). The column body portion (21) is inserted into the installation through-hole (11). The first limiting portion (22) is provided on the side of the column body portion (21) facing away from the pole group, and the second limiting portion (23) is provided on the side of the column body portion (21) facing the pole group. The plastic insulating member (32) is sleeved on the column body portion (21) and is clamped between the surface of the housing (1) facing away from the outside of the pole group and the first limiting portion (22).
5. The battery housing according to claim 4, characterized in that, The width dimension of the plastic insulating member (32) in the second direction is D, and the overlapping width dimension of the first limiting portion (22) and the plastic insulating member (32) in the second direction is d, and d ≥ 0.5D is satisfied.
6. The battery housing according to claim 4, wherein, The battery housing further includes an insulating seal (4) sleeved on the column body portion (21) and used for sealing the gap between the column body portion (21), the second limiting portion (23), and the housing (1).
7. The battery housing according to claim 6, characterized in that, The insulating seal (4) includes a seal body (41) and a seal flange (42). The seal flange (42) is provided on the side of the seal body (41) close to the second limiting portion (23) and extends in a direction away from the central axis of the pole (2). The seal body (41) is sleeved on the column body portion (21), and the seal flange (42) is clamped between the housing (1) and the second limiting portion (23).
8. The battery housing according to claim 7, wherein, A second installation groove (24) is formed on the column body portion (21), and the seal body (41) is accommodated in the second installation groove (24).
9. The battery housing according to claim 1, characterized in that, The cross-section of the high-temperature resistant insulating member (31) is trapezoidal, and the first installation groove (321) is a dovetail groove matching the high-temperature resistant insulating member (31).
10. A battery, characterized in that, The battery includes the battery housing according to any one of claims 1-9.