Novel power battery cover plate structure
By designing concave-structured poles and insulating components, and combining improvements to injection molding parts, the problem of difficulty in reducing the thickness of poles in existing power battery covers has been solved, achieving improved conductivity, enhanced sealing, and convenient material recycling.
Patent Information
- Application Number
- CN202422944309.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The existing power battery cover has a relatively thick electrode post, resulting in low conductivity, high resistance, difficulty in controlling material costs, unstable insulation and sealing effects, and difficulty in recycling the copper-aluminum composite material of the negative electrode post.
The pole adopts a concave structure, combined with the design of insulating and injection-molded parts, eliminating the protruding part at the top of the pole. By inserting an insulating part between the cover plate and the pole, and performing injection molding sealing at the bottom of the pole, the insulation and sealing processes are separated. A stable seal is achieved using a soft sealing ring and a stepped mounting platform.
The thickness of the electrode post can be adjusted to be thinner according to needs, which improves conductivity, reduces material costs, enhances sealing, and facilitates the recycling of copper and aluminum materials.
Smart Images
Figure CN223539736U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery cover technology, specifically to a novel power battery cover structure. Background Technology
[0002] The convex structure of most existing power battery cover plates leads to a series of unavoidable structural problems: First, the outer periphery of the protruding part of the terminal is usually quite thick and difficult to thin in order to be fixed to the cover plate through plastic coating, which makes it impossible to effectively improve conductivity, resulting in high resistance and making it difficult to effectively reduce material costs and control manufacturing costs; Second, the plastic injection molding method for the outer periphery of the terminal is usually not stable in terms of insulation and sealing, making leakage of power batteries inevitable; Third, in particular, the negative terminal is usually made of copper-aluminum composite material. During the machining process of the negative terminal into a convex structure, copper and aluminum waste inevitably mix and accumulate, which is not conducive to the manufacturer's classification and recycling, increasing the difficulty of material recycling.
[0003] In conclusion, the existing power battery cover structure still needs further improvement to meet actual usage requirements. Utility Model Content
[0004] This utility model provides a novel power battery cover structure, which mainly solves the problem that the existing battery terminals are too thick and difficult to thin, resulting in difficulty in controlling and adjusting the resistance. The main technical solution adopted is as follows:
[0005] A novel power battery cover structure includes a cover plate, an insulating component, a sealing ring, a terminal post, and an injection molded part. The cover plate has a locating hole and a locating groove formed on the outer periphery of the locating hole for the sealing ring and the insulating component to be fitted onto it. The locating groove is formed on the upper surface of the cover plate, and the insulating component is located on the outer periphery of the sealing ring. The terminal post has a recessed cover portion on its lower side, and a retaining cavity is formed inside the recessed cover portion. The terminal post is inserted into the insulating component, and the recessed cover portion covers the sealing ring, allowing the retaining cavity to communicate with the locating hole. The insulating component is located between the cover plate and the terminal post and is sealed to the outer wall of the terminal post. The injection molded part is located on the lower side of the cover plate. A first mounting platform and a second mounting platform with axial spacing are formed on the outer periphery of the injection molded part. The injection molded part passes through the locating hole to axially limit the terminal post onto the cover plate via the first and second mounting platforms.
[0006] Preferably, the first mounting platform is located above the second mounting platform; the first mounting platform is used to limit and press the sealing ring and the insulating component against the limiting groove, and the second mounting platform is used to cooperate with the first mounting platform to axially limit the pole post on the cover plate.
[0007] Preferably, both the first mounting platform and the second mounting platform are arranged in a "stepped" shape.
[0008] Preferably, the injection molded part is arranged in an "I" shape.
[0009] Preferably, the inner circumference of the insulating member is provided with an annular guide portion, and the first mounting platform abuts against the concave cover portion to limit and constrain the insulating member within the limiting groove by acting on the annular guide portion.
[0010] Preferably, the sealing ring is configured as a soft sealing ring; when the sealing ring is pressed against the first mounting platform, the deformation of the sealing ring is flush with the height of the insulating component.
[0011] Preferably, the first mounting platform has a first stepped surface and a second stepped surface; the first stepped surface and the second stepped surface act on the sealing ring respectively.
[0012] Preferably, the sealing ring has a first contact surface and a second contact surface that correspond to and interact with the first stepped surface and the second stepped surface, respectively.
[0013] Preferably, the horizontal height of the first phase contact surface is higher than the horizontal height of the second phase contact surface.
[0014] Preferably, it also includes a lower plastic, wherein when the injection molding part axially limits the pole post on the cover plate, the injection molding part limits and constrains the lower plastic to the lower side of the cover plate.
[0015] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:
[0016] (1) This utility model provides a novel power battery cover structure, solving the problem that the existing battery terminals are too thick and difficult to thin, resulting in difficulty in controlling and adjusting the resistance. The technical solution of this utility model abandons the existing convex terminal structure and directly eliminates the protruding part at the upper end of the convex terminal, adopting a concave terminal structure. This eliminates the need for insulation sealing through plastic wrapping at the upper outer periphery of the terminal. Instead, an insulating component is directly sleeved between the cover plate and the terminal, resulting in more stable insulation. Furthermore, the sealing is achieved by injection molding in the concave cover at the lower end of the terminal, replacing the existing method of plastic wrapping at the upper outer periphery of the terminal. This separates insulation and sealing, allowing the overall thickness of the terminal to be adjusted to a thinner thickness to control conductivity efficiency, resulting in stronger product performance. It also reduces material costs, making it more competitive in the market.
[0017] (2) The negative electrode post is usually a composite structure of aluminum on top and copper on the bottom. That is, the lower part of the electrode post in this technical solution is a concave cover made of copper material, and the upper part is made of aluminum material. Therefore, in the actual processing, only the concave cover with a cavity needs to be processed to complete the production of the electrode post. In this way, the copper material will not mix with the aluminum material, and it is easier for the manufacturer to recycle the material.
[0018] (3) In this technical solution, the sealing ring is configured as a soft sealing ring, so that the sealing ring can be deformed and compressed when subjected to force to ensure sealing performance.
[0019] (4) In this technical solution, the first and second stepped surfaces on the first mounting platform both act on the sealing ring and interact with the first and second phase contact surfaces on the sealing ring. In this way, the entire sealing ring can be subjected to force and deformed, resulting in stronger sealing performance. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a structural schematic diagram of an existing power battery cover.
[0022] Figure 2 for Figure 1 A magnified view of part A shown;
[0023] Figure 3 This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0024] Figure 4 This is an exploded view of the overall embodiment of this utility model;
[0025] Figure 5 This is an exploded sectional view of an embodiment of the present utility model;
[0026] Figure 6 This is a schematic cross-sectional view of an embodiment of the present utility model.
[0027] Figure 7 for Figure 6 A magnified view of part B shown.
[0028] The annotations in the attached figures are explained as follows:
[0029] 1. Cover plate; 11. Limiting hole; 12. Limiting groove;
[0030] 2. Insulating components; 21. Annular guide section;
[0031] 3. Sealing ring; 31. First phase contact surface; 32. Second phase contact surface;
[0032] 4. Pole post; 41. Recessed cap; 42. Locking cavity;
[0033] 5. Injection molded part; 51. First mounting platform; 511. First stepped surface; 512. Second stepped surface; 52. Second mounting platform;
[0034] 6. Lower plastic. Detailed Implementation
[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0036] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.
[0037] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.
[0038] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.
[0039] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".
[0040] Please see Figures 1 to 7 .
[0041] This embodiment provides a novel power battery cover structure, solving the problem that the existing battery terminal post 4 is too thick and difficult to thin, resulting in difficulty in controlling and adjusting the resistance; see [link to previous document]. Figure 1 and Figure 2 The existing power battery cover structure uses a convex structure for the terminal post 4. In order to form an injection molded part 5 to be fixed to the cover plate 1 through a plastic coating process, the outer periphery of the protruding part of the terminal post 4 usually needs to maintain a certain thickness. Otherwise, the plastic coating process cannot be completed. Therefore, the thickness of the protruding part cannot be reduced, and the conductivity efficiency cannot be effectively improved, resulting in high resistance. Furthermore, the insulation and sealing effect of the injection molded part 5 on the outer periphery of the upper end of the terminal post 4 is usually not stable enough, and leakage of the power battery is inevitable. In particular, the injection molded part 5 is on the outside and is easily damaged. Moreover, especially the negative terminal post 4, which is usually made of copper-aluminum composite material, that is, the upper part of the protruding structure of the terminal post 4 is made of aluminum and the lower part is made of copper. During the machining process to form a convex structure, the lower part of the copper material is inevitably machined. It is difficult to avoid copper waste mixing with aluminum waste and accumulating in the discharge, making material recycling extremely difficult.
[0042] In this embodiment, see Figures 3 to 7 The power battery cover structure mainly includes: cover plate 1, insulating component 2, sealing ring 3, terminal post 4, and injection molded component 5; among which,
[0043] The cover plate 1 is rectangular and has two limiting holes 11 formed at its left and right ends for placing the positive terminal 4 and the negative terminal 4 respectively. The outer periphery of the two limiting holes 11 is recessed with limiting grooves 12 for placing the sealing ring 3 and the insulating part 2. The limiting grooves 12 are formed on the upper end plate surface of the cover plate 1, and the insulating part 2 is located on the outer periphery of the sealing ring 3.
[0044] The pole post 4 is made of copper-aluminum composite material. Its upper side is an aluminum cylinder, and a copper concave cover 41 is formed on the lower side of the cylinder. A retaining cavity 42 is formed inside the concave cover 41. The pole post 4 can be inserted into the insulating internal parts, and the concave cover 41 covers the sealing ring 3, so that the retaining cavity 42 is in communication with the limiting hole 11. In this embodiment, during actual processing, the concave cover 41 can be formed by scraping the bottom of the pole post 4 with a drill bit or boring tool. The whole structure is concave, and since it no longer uses a convex structure, the outer periphery of the pole post 4 does not need to be machined. Therefore, the concave cover 41 will only generate copper scrap and will not generate aluminum scrap.
[0045] Insulating component 2 is located between cover plate 1 and pole post 4, and is sealed to the outer wall of pole post 4; the insulation of the existing structure mainly relies on, for example, Figure 2As shown, insulation and sealing are achieved by forming an injection molded part 5 on the outer periphery of the upper end of the plastic-coated pole 4. This insulation has certain requirements for the injection molding process. If the injection is not completely filled during the injection process, the insulation and sealing effect will be poor. Therefore, in this embodiment, a sleeve-shaped insulating part 2 is directly used instead. The insulation can be maintained by simply sealing and pressing the insulating part 2 tightly.
[0046] Injection molded part 5, see Figure 7 It is arranged in an "I" shape and is located on the underside of cover plate 1; see Figure 1 and Figure 2 In the existing structure, the injection-molded part 5 is located on the upper side of the cover plate 1, i.e., the outer periphery of the pole post 4, through a plastic coating method, and the injection-molded part 5 serves the functions of insulation and sealing; while in this embodiment, see Figure 7 The injection molded part 5 is placed on the lower periphery of the cover plate 1 by injection molding from bottom to top. The outer periphery of the injection molded part 5 is provided by a first mounting platform 51 and a second mounting platform 52 with an axial spacing. The injection molded part 5 passes through the limiting hole 11 so as to axially limit the pole post 4 on the cover plate through the first mounting platform 51 and the second mounting platform 52.
[0047] In this embodiment, see Figure 5 The first mounting platform 51 is located above the second mounting platform 52, and both the first mounting platform 51 and the second mounting platform 52 are arranged in a stepped manner; see also Figure 6 and Figure 7 When the injection molded part 5 is located on the cover plate 1, the first mounting platform 51 is used to limit and press the sealing ring 3 and the insulating part 2 into the limiting groove 12. The second mounting platform 52 is used to cooperate with the first mounting platform 51 to axially limit the pole post 4 and the lower plastic 6 on the cover plate. The lower plastic 6 is mainly located on the lower side of the cover plate.
[0048] In this embodiment, see Figures 5 to 7 An annular guide portion 21 is provided on the inner circumference of the insulating component 2. The first mounting platform 51 abuts against the concave cover portion 41 to limit and constrain the insulating component 2 within the limiting groove 12 by acting on the annular guide portion 21. At the same time, the first mounting platform 51 also abuts against the sealing ring 3 to constrain it within the limiting groove 12. The sealing ring 3 is configured as a soft sealing ring 3. When the sealing ring 3 is abutted by the first mounting platform 51, the deformation of the sealing ring 3 is flush with the height of the annular guide portion 21.
[0049] In this embodiment, see Figure 5 The sealing ring 3 has an "L" shaped cross section and has a first phase contact surface 31 and a second phase contact surface 32. The horizontal height of the first phase contact surface 31 is higher than the horizontal height of the second phase contact surface 32, and the first phase contact surface 31 is located on the outer periphery of the second phase contact surface 32.
[0050] In this embodiment, see Figure 5The first mounting platform 51 has a first stepped surface 511 and a second stepped surface 512; see also Figure 7 The first stepped surface 511 can abut against the concave cover 41 and indirectly act on the first contact surface 31 of the sealing ring 3, while the second stepped surface 512 can directly abut against the second contact surface 32 of the sealing ring 3, so that the entire sealing ring 3 can be compressed and deformed to achieve a sealing effect.
[0051] Working principle and usage process of this utility model:
[0052] This utility model exemplifies one method of installing a battery cover structure; see [link to relevant documentation]. Figures 4 to 7 First, the sealing ring 3 and the insulating component 2 are placed and installed in the limiting groove 12 on the outer periphery of the limiting hole 11, so as to achieve the pre-positioning of the sealing ring 3 and the insulating component 2. Then, the pole post 4 is inserted into the insulating component 2 until the concave cover part 41 at the lower end of the pole post 4 abuts against the first phase contact surface 31 of the sealing ring 3. Next, the lower plastic 6 is placed on the lower side of the cover plate and the injection molded part 5 is formed by injection molding process, so that the first stepped surface 511 of the first mounting platform 51 acts on the concave cover part 41 and the second stepped surface 512 acts on the second phase contact surface 32 of the sealing ring 3, driving the pole post 4 to move and tighten in the direction of the limiting hole 11, so that the concave cover part 41 at the lower end of the pole post 4 is pressed against the annular guide part 21 of the insulating component 2, and the entire sealing ring 3 begins to deform in conjunction to complete the insulation and sealing effect. Among them, the second mounting platform 52 can cooperate with the first mounting platform 51 to limit the axial displacement of the pole post 4, the sealing ring 3, and the insulating component 2. Therefore, this utility model abandons the existing convex electrode post 4 structure and directly eliminates the protruding upper part of the convex electrode post 4, adopting a concave electrode post 4 structure. This eliminates the need for plastic coating for insulation and sealing of the upper outer periphery of the electrode post 4. Instead, an insulating component 2 is directly sleeved between the cover plate 1 and the electrode post 4, resulting in more stable insulation. Furthermore, the sealing is achieved by injection molding in the concave cover part 41 at the lower end of the electrode post 4, replacing the existing plastic coating method for the upper outer periphery of the electrode post 4. This separates insulation and sealing, allowing the overall thickness of the electrode post 4 to be adjusted to a thinner thickness to control conductivity efficiency, resulting in stronger product performance. It also reduces material usage to control costs, making it more competitive in the market.
[0053] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.
Claims
1. A novel power battery cover structure, characterized in that: The power battery cover structure includes a cover plate, insulating components, sealing rings, terminals, and injection-molded parts; among which, The cover plate has a limiting hole formed therein, and a limiting groove is recessed at the outer periphery of the limiting hole for the sealing ring and the insulating component to be sleeved and placed. The limiting groove is formed on the upper end plate surface of the cover plate, and the insulating component is located on the outer periphery of the sealing ring. The electrode post has a recessed cover on its lower side, and a retaining cavity is formed inside the recessed cover; the electrode post is inserted into an insulating component, and the recessed cover covers the sealing ring, so that the retaining cavity is in communication with the limiting hole; An insulating component is located between the cover plate and the pole post, and is sealed to the outer wall of the pole post. The injection molded part is located on the underside of the cover plate; the outer periphery of the injection molded part has a first mounting platform and a second mounting platform with an axial spacing; the injection molded part passes through the limiting hole to axially limit the pole post on the cover plate through the first mounting platform and the second mounting platform.
2. The novel power battery cover structure as described in claim 1, characterized in that: The first mounting platform is located above the second mounting platform; the first mounting platform is used to limit and abut the sealing ring and the insulating component in the limiting groove, and the second mounting platform is used to cooperate with the first mounting platform to axially limit the pole post on the cover plate.
3. The novel power battery cover structure as described in claim 1, characterized in that: The injection molded part is arranged in an "I" shape.
4. The novel power battery cover structure as described in claim 1, characterized in that: Both the first mounting platform and the second mounting platform are arranged in a "stepped" shape.
5. The novel power battery cover structure as described in claim 2, characterized in that: The inner circumference of the insulating component is provided with an annular guide portion, and the first mounting platform abuts against the concave cover portion to limit and constrain the insulating component within the limiting groove by acting on the annular guide portion.
6. The novel power battery cover structure as described in claim 5, characterized in that: The sealing ring is configured as a soft sealing ring; when the sealing ring is pressed against the first mounting platform, the deformation of the sealing ring is flush with the height of the annular guide portion.
7. The novel power battery cover structure as described in claim 5, characterized in that: The first mounting platform has a first stepped surface and a second stepped surface; the first stepped surface and the second stepped surface act on the sealing ring respectively.
8. The novel power battery cover structure as described in claim 7, characterized in that: The sealing ring has a first contact surface and a second contact surface that correspond to and interact with the first stepped surface and the second stepped surface, respectively.
9. A novel power battery cover structure as described in claim 8, characterized in that: The horizontal height of the first phase contact surface is higher than the horizontal height of the second phase contact surface.
10. A novel power battery cover structure as described in claim 1, characterized in that: It also includes a lower plastic, which, when the injection molding part axially limits the pole post to the cover plate, simultaneously limits and constrains the lower plastic to the lower side of the cover plate.