Cover plate assembly and battery cell module

Abstract

The utility model discloses a cover plate assembly and a battery cell module, the cover plate assembly comprises a cover plate main body, a pole and a fixing assembly, the cover plate main body is provided with a first through hole, the pole comprises a pole plate body and a pole main body, the first end of the pole main body is connected with the pole plate body, the second end of the pole main body penetrates through the first through hole, and the fixing assembly is arranged on the pole plate body. The cover plate body extends to one side, far away from the pole plate body, of the cover plate body; the part of the pole main body on one side, far away from the pole plate body, of the cover plate main body is fixed through a fixing assembly; the fixing assembly is made of solid metal. The first through hole with the hole diameter larger than that of the pole main body is formed, so that the pole main body penetrates through the first through hole, the pole main body and the cover plate main body are locked through the fixing assembly on the side, away from the pole plate body, of the pole main body, and the fixing assembly made of metal is higher in structural strength and easy to fix and install; and auxiliary structures such as a riveting die are not needed, so that the assembly difficulty and cost of the cover plate assembly are reduced.

Description

Technical Field

[0001] This application relates to the field of power electronic equipment technology, and in particular to a cover plate assembly and a battery cell module. Background Technology

[0002] In the battery market, cover plate assemblies are used to isolate the internal environment of the battery cell and to provide good support for the battery cell's terminals. Current cover plate assemblies require multiple layers of coating or plastic layers to maintain insulation from the cover plate body, resulting in a complex structure. Whether riveted or injection molded, the structure requires many structural components, leading to high costs and complex assembly.

[0003] Therefore, how to reduce the production cost and assembly difficulty of cover plate components is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a cover plate assembly and a cell module to reduce the production cost and assembly difficulty of the cover plate assembly.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A cover plate assembly, comprising:

[0007] The cover plate body has a first through hole.

[0008] The electrode post includes an electrode post plate and an electrode post body;

[0009] Wherein, the first end of the pole body is connected to the pole plate, the second end of the pole body passes through the first through hole and extends to the side of the cover plate body away from the pole plate; the portion of the pole body located on the side of the cover plate body away from the pole plate is fixed to the cover plate body by a fixing component; the fixing component is made of solid metal.

[0010] Preferably, in the above-mentioned cover plate assembly, the fixing component includes a first fixing member and a second fixing member, the first fixing member and the second fixing member forming a fixing ring; the fixing ring and the pole plate fix the pole from opposite sides of the cover plate body.

[0011] Preferably, in the above-mentioned cover plate assembly, the pole body includes a connecting section and a locking section arranged along its axial direction, the outer diameter of the locking section is larger than that of the connecting section, and the locking section is located on both sides opposite to the pole plate body on the cover plate body; the connecting section passes through the first through hole, and the fixing ring locks the pole body and the cover plate body in the axial direction of the pole body.

[0012] Preferably, in the above-mentioned cover plate assembly, the fixing ring is embedded in the pole body.

[0013] Preferably, the cover plate assembly further includes a first insulating member for insulating the fixing ring and the pole body, the first insulating member being a sealing ring, the sealing ring being disposed radially between the connecting section and the first through hole.

[0014] Preferably, the cover plate assembly further includes a second insulating member for insulating the fixing ring from the cover plate body. The second insulating member is a plastic layer, which is fixed to the side of the cover plate body facing the pole plate and is placed between the pole plate body and the cover plate body.

[0015] Preferably, in the above-mentioned cover plate assembly, the sealing ring is a variable cross-section structure along its axial direction, and includes a thicker filling section and a thinner recessed section, with the fixing ring surrounding the outer wall of the recessed section;

[0016] The two ends of the filling section in the axial direction are respectively clamped by the fixing ring and the pole plate, and the two ends of the fixing ring in the axial direction are respectively clamped by the filling section and the locking section.

[0017] Preferably, in the above-mentioned cover plate assembly, a second through hole is further provided on the cover plate body, and the pole post is respectively installed in the first through hole and the second through hole.

[0018] Preferably, in the above-mentioned cover plate assembly, the fixing ring is fixedly provided with an insulating gasket or sprayed with an insulating coating on the side facing the locking section.

[0019] A battery cell module includes the cover plate assembly described in any of the above embodiments.

[0020] As can be seen from the above technical solution, the cover plate assembly provided in this disclosure has a first through hole in the cover plate body for the electrode body on the electrode post to pass through. At the same time, the outer diameter of the area where the electrode body passes through the first through hole is smaller than the inner diameter of the first through hole, so that the electrode body and the cover plate body are kept separated, and the electrode body and the cover plate are kept insulated by the setting of the insulating component. Specifically, the electrode post includes an electrode plate and an electrode body. The first end of the electrode body is fixedly connected to the electrode plate, while the second end of the electrode body passes through the first through hole and extends to the side of the cover plate body away from the electrode plate. The area where the electrode body passes through the first through hole provides a fixed position, so that the electrode body and the cover plate body can be fixed by the fixing component. The structure of the electrode body passing through and fixed on the cover plate body provides a larger installation space, realizes convenient assembly of the electrode post on the cover plate body, and has low material and assembly costs. At the same time, the fixing component is made of metal to improve the connection strength between the electrode post and the cover plate body and ensure the structural stability of the cover plate assembly. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 An exploded view of the cover plate assembly provided in this disclosure;

[0023] Figure 2 This is a schematic diagram of the cover plate assembly.

[0024] Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure;

[0025] Figure 4 for Figure 3 Detailed view of the installation location of the center pole.

[0026] Among them, 10-cover plate body; 110-first through hole; 120-second through hole; 20-pole post; 210-pole post plate body; 220-connecting section; 230-locking section; 240-pole post body; 310-plastic layer; 320-sealing ring; 3210-filling section; 3220-recessed section; 4-fixing component; 40-fixing ring; 410-first fixing member; 420-second fixing member; 50-insulating spray coating. Detailed Implementation

[0027] The core of this application is to disclose a cover plate assembly and a battery cell module, so as to reduce the production cost and assembly difficulty of the cover plate assembly.

[0028] To enable those skilled in the art to better understand the present application, embodiments of the present application will be described below with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model described in the claims. Additionally, the complete content of the structures represented in the following embodiments is not limited to those necessary for the solution of the utility model described in the claims.

[0029] like Figure 1 and Figure 2 As shown, this disclosure provides a cover plate assembly, which mainly includes a cover plate body 10, an electrode post 20, a fixing component 4, and an insulating component. The cover plate body 10 has a first through hole 110 for a portion of the electrode post 20 to pass through. Specifically, the electrode post 20 includes an electrode post plate 210 and an electrode post body 240. The electrode post plate 210 is a plate structure to support the electrode post body 240, while the electrode post body 240 is a columnar structure. The outer diameter of the electrode post body 240 is smaller than the inner diameter of the first through hole 110, so that the electrode post body 240 on the electrode post 20 can pass through the first through hole 110 for installation, while keeping the area of ​​the electrode post body 240 passing through the first through hole 110 spaced apart from the inner wall of the first through hole 110 for insulation.

[0030] Specifically, the first end of the pole body 240 is fixedly connected to the pole plate 210 to maintain the structural stability of the pole body 240, while the second end of the pole body 240 is provided through the first through hole 110. Simultaneously, the pole body 240 extends through the first through hole 110 to the side of the cover plate body 10 away from the pole plate 210, providing a fixing space for the pole 20. The portion of the pole body 240 that passes through the cover plate body 10 and is away from the pole plate 210 is fixedly connected to the cover plate body 10 via a fixing component 4. This structure, through the through-and-extend structure of the pole body 240, provides sufficient fixing space for the fixing component 4. During the installation of the cover plate assembly, the pole 20 is positioned through the pole body 240 passing through the first through hole 110 and can be fixed on one side of the cover plate body 10 via the fixing component. The assembly process is simple and provides sufficient operating space. It should also be noted that in this disclosure, the fixing component 4 is made of solid metal to have sufficient connection strength, so as to ensure a stable connection structure between the pole post 20 and the cover plate body 10 on one side of the cover plate body 10.

[0031] As for the fixing component 4, it is used to lock the pole body 240. Specifically, the fixing component 4 includes at least a first fixing member 410 and a second fixing member 420. The first fixing member 410 and the second fixing member 420 are separately arranged and can be enclosed to form a fixing ring 40. It should be noted that in some embodiments of this disclosure, the first fixing member 410 and the second fixing member 420 are both semi-circular structures.

[0032] A retaining ring 40 clamps the electrode post body 240 from its outer periphery and is fixed by welding to form a ring structure, thereby locking the electrode post 20 to the cover plate body 10. Simultaneously, the retaining ring 40 and the electrode post plate 210 are located on opposite sides of the cover plate body 10, respectively, to fix the electrode post 20 to the cover plate body 10 through a clamping structure on both sides. It should be noted that the first fixing member 410 and the second fixing member 420 reduce the installation difficulty of the retaining ring 40 while maintaining its locking effect. Furthermore, the first fixing member 410 and the second fixing member 420 can be made of aluminum to reduce weight and facilitate spot welding.

[0033] Furthermore, the cover plate assembly also includes a first insulating component and a second insulating component. The first insulating component insulates the fixing ring 40 and the pole body 240. Since the fixing ring 40 is sleeved on the outer periphery of the pole body 240, the first insulating component can be disposed on the radial outer wall of the pole body 240 to achieve insulation between the fixing ring 40 and the pole body 240. The second insulating component insulates the fixing ring 40 and the cover plate body 10. It is disposed between the fixing ring 40 and the cover plate body 10 in the axial direction of the fixing ring 40 to achieve insulation. It should be noted that the insulating component can be an integral structural component or multiple separate components assembled individually to the location requiring insulation.

[0034] To further optimize the above technical solutions, such as Figure 3 and Figure 4 As shown, in some embodiments of this disclosure, the pole body 240 has a variable cross-section structure along its axial direction, and a connecting section 220 and a locking section 230 are provided along the axial direction. It should be noted that the outer diameters of the pole plate 210 and the locking section 230 are larger than the outer diameter of the connecting section 220, so that the pole 20 presents a dumbbell-like structure with convex ends and a concave middle area. It should also be noted that in one embodiment of this disclosure, the outer diameter of the pole plate 210 is larger than the inner diameter of the first through hole 110, so that it cannot pass through the first through hole 110 on the cover plate body 10. The outer diameters of the connecting section 220 and the locking section 230 are both smaller than the first through hole 110, so that they can pass through the first through hole 110 during assembly. While both the connecting section 220 and the locking section 230 pass through the first through hole 110, only the connecting section 220 is located within the first through hole 110.

[0035] It should be noted that the outer diameter of the pole plate 210 can be equal to or smaller than the first through hole 110. However, during the assembly process, the operator needs to determine the depth of the pole 20 through the first through hole 110 so that the pole plate 210 and the locking section 230 are located on opposite sides of the cover plate body 10, in order to meet the assembly requirements of the pole 20 on the cover plate body 10. Compared with the pole plate 210 whose outer diameter is larger than the inner diameter of the first through hole 110, the assembly is slightly more complicated, but it saves some material costs.

[0036] Based on the above structure, by utilizing the variable cross-section structure of the pole body 240 in its axial direction, the fixing ring 40 and part of the insulating component can fill the area of ​​the connecting section 220 in the axial direction, and abut against the pole plate 210 and the locking section 230 from both sides respectively, so as to achieve a fixed connection between the cover plate body 10 and the pole 20. It should be noted that the fixing process of the above structure does not require the use of riveting components. It mainly relies on the recessed structure of the connecting section 220 relative to the pole plate 210 and the locking section 230, and the locking of the axial degree of freedom is achieved by the cooperation of the insulating component of the fixing ring 40. The insulating component that is first assembled with the pole 20 can fill the area between the first through hole 110 and the connecting section 220, while the subsequently installed fixing ring 40 fills the axial area of ​​the insulating component, and cooperates with the insulating component to abut against the pole plate 210 and the locking section 230 in the axial direction of the pole 20 to achieve the assembly of the cover plate body 10 and the pole 20.

[0037] It should be noted that, based on the above embodiments, the fixing ring 40 can be embedded in the pole body 240 for setting, that is, the fixing ring 40 can be locked in the connecting section 220 of the pole body 240 in the concave area, so as to form a concave structure relative to the pole plate 210 and the locking section 230, thereby improving the structural compactness of the cover plate assembly; at the same time, a groove can also be made on the connecting section 220 so that the fixing ring 40 is completely embedded in the connecting section 220 to maintain the locking effect.

[0038] Furthermore, in the cover plate assembly provided in this disclosure, the insulating component needs to insulate the side of the pole plate 210 facing the cover plate body 10, the area between the connecting section 220 and the inner wall of the first through hole 110, and the side of the locking section 230 facing the cover plate body 10, in order to ensure the smooth use of the pole 20. The insulating component that achieves the above insulation requirements can adopt an integral structure, which can be sleeved on the outer wall surface of the entire pole 20 to insulate the pole 20 from the cover plate body 10. Similarly, the insulating component can also adopt a split structure to meet the insulation requirements, so as to facilitate production and assembly. Taking the split structure insulating component as an example, in some embodiments of this disclosure, the first insulating component is a sealing ring 320 structure, and the second insulating component is... The structure is configured as an integral plastic layer 310, wherein the plastic layer 310 is a plate-shaped structure of insulating plastic material and is fixed to the side of the cover plate body 10 facing the pole plate 210. The plastic layer 310 is padded on most of the area of ​​one side of the cover plate body 10. When the pole body 240 is assembled through the first through hole 110, the side of the pole plate 210 facing the cover plate body 10 contacts and presses against the plastic layer 310 to achieve flexible and insulating assembly. The sealing ring 320 is sleeved on the outer wall of the connecting section 220. On the one hand, it fills the area between the connecting section 220 and the first through hole 110 to achieve circumferential positioning of the pole 20, while maintaining the insulation between the connecting section 220 and the first through hole 110.

[0039] Based on the above structure, the sealing ring 320 can abut against the pole plate 210 and the locking section 230 at its two axial ends respectively. On the one hand, it can be stably set at the position of the connecting section 220 on the pole 20, and provide a larger assembly space for the fixing ring 40. That is, the sealing ring 320 is locked in position with the connecting section 220 in both the circumferential and radial directions of the pole 20. At this time, it is only necessary to cut a groove in a part of the outer wall of the sealing ring 320 so that the fixing ring 40 can be embedded, thereby realizing the insulating assembly of the cover plate body 10 and the pole 20.

[0040] It should be noted that the above structure sets the insulating components as a separate plastic layer 310 and a sealing ring 320. The plastic layer 310 can be directly assembled to one side of the cover plate body 10. The cover plate body 10 and the plastic layer 310 can have one or more through holes and be assembled into an integral structure by fasteners such as bolts. The two can be pre-assembled as a component structure to reduce the difficulty of subsequent assembly. The sealing ring 320 is also pre-installed with the pole post 20. It is sleeved on the outer wall area of ​​the connecting section 220 on the pole post 20 and passes through the first through hole 110 simultaneously with the pole post 20 to contact the inner wall of the first through hole 110. At the same time, after the fixing ring 40 is installed, the pole post 20 and the cover plate body 10 are locked together, making the assembly operation convenient.

[0041] To further optimize the above technical solution, in some embodiments of this disclosure, the sealing ring 320 is specifically configured as a variable cross-section structure along its axial direction, and for ease of production and assembly, it can be configured with a stepped structure. Specifically, the sealing ring 320 includes a filling section 3210 and a recessed section 3220 arranged along its axial direction, and the wall thickness of the filling section 3210 is greater than that of the recessed section 3220. Correspondingly, the fixing ring 40 is sleeved around the outer wall of the recessed section 3220, and can be locked by abutting against the filling section 3210 on one side in the axial direction. Furthermore, during the locking connection process of the above structure, due to the stepped structure of the sealing ring 320, the two ends of the filling section 3210 in the axial direction respectively abut against the fixing ring 40 and the pole plate 210 to achieve a first-level clamping, while the two ends of the fixing ring 40 in the axial direction are respectively clamped and fixed by the filling section 3210 and the locking section 230 to achieve a second-level clamping, thereby locking the axial degree of freedom of the pole 20 and maintaining a stable connection with the cover plate body 10.

[0042] Furthermore, based on the above embodiments, the side of the retaining ring 40 facing the locking section 230 also needs to be insulated to prevent a short circuit between the retaining ring 40 and the pole post 20. This can be achieved by using a separate insulating gasket to maintain the isolation between the retaining ring 40 and the locking section 230. The insulating gasket can be fixedly installed on one side of the retaining ring 40 or on the side of the locking section 230 facing the retaining ring 40. Similarly, the sealing ring 320 can also be provided with an additional variable cross-section structure to fill the area between the retaining ring 40 and the locking section 230, thereby maintaining the insulating isolation between the retaining ring 40 and the locking section 230. Furthermore, as... Figure 4 As shown, in some embodiments of this disclosure, the side of the retaining ring 40 facing the locking section 230 may also be sprayed with an insulating coating 50 during the assembly process to provide insulation barrier. This is simple to operate and can further reduce the assembly difficulty of the cover plate assembly.

[0043] It should be noted that in some embodiments of this disclosure, the recessed section 3220 of the sealing ring 320 is spaced apart from the locking section 230 on the side facing the locking section 230, and the recessed section 3220 is flush with the side of the fixing ring 40 facing the locking section 230, so that there is a certain assembly floating space between the sealing ring 320 and the pole post 20, thereby increasing the ease of assembly. At the same time, the recessed section 3220 with one side flush with the fixing ring 40 can also form a reference plane. On this basis, an insulating gasket or an insulating spray coating 50 can be applied to form an insulating layer of uniform thickness, thereby improving the sealing and insulation effect of the cover plate assembly. In addition, it should be noted that in the cover plate assembly provided in this disclosure, a second through hole 120 is also provided on the cover plate body 10. A pole post 20 is installed at the positions of the first through hole 110 and the second through hole 120 respectively to meet the usage requirements. The installation structure of the pole post 20 at the second through hole 120 is the same as the installation structure of the pole post 20 at the first through hole 110 in the aforementioned embodiments, and will not be described again here.

[0044] Furthermore, this disclosure also provides a battery cell module, which includes the cover plate assembly provided in any of the above embodiments. It should be noted that, since the cover plate assembly has the aforementioned technical effects, the battery cell module also possesses the aforementioned technical effects, and will not be described again here.

[0045] The terms "first," "second," "left side," and "right side," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units may not be defined in the listed steps or units, but may include steps or units not listed.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cover plate assembly, characterized in that, include: The cover plate body (10) has a first through hole (110). The pole (20) includes a pole plate (210) and a pole body (240). Wherein, the first end of the pole body (240) is connected to the pole plate (210), and the second end of the pole body (240) passes through the first through hole (110) and extends to the side of the cover plate body (10) away from the pole plate (210); the part of the pole body (240) located on the side of the cover plate body (10) away from the pole plate (210) is fixed to the cover plate body (10) by a fixing component (4); the fixing component (4) is made of solid metal.

2. The cover plate assembly as claimed in claim 1, characterized in that, The fixing component (4) includes a first fixing member (410) and a second fixing member (420), the first fixing member (410) and the second fixing member (420) forming a fixing ring (40); the fixing ring (40) and the pole plate (210) fix the pole (20) from the opposite sides of the cover plate body (10).

3. The cover plate assembly as claimed in claim 2, characterized in that, The pole body (240) includes a connecting section (220) and a locking section (230) arranged along its axial direction. The outer diameter of the locking section (230) is larger than that of the connecting section (220), and it is located on both sides opposite to the cover plate body (10) and the pole plate body (210). The connecting section (220) passes through the first through hole (110), and the fixing ring (40) locks the pole body (240) and the cover plate body (10) in the axial direction of the pole body (240).

4. The cover plate assembly as claimed in claim 3, characterized in that, The fixing ring (40) is embedded in the pole body (240).

5. The cover plate assembly as claimed in claim 3, characterized in that, It also includes a first insulating element for insulating the fixing ring (40) and the pole body (240), the first insulating element being a sealing ring (320), the sealing ring (320) being disposed radially between the connecting section (220) and the first through hole (110).

6. The cover plate assembly of claim 5, wherein, It also includes a second insulating element for insulating the fixing ring (40) and the cover plate body (10), the second insulating element being a plastic layer (310), the plastic layer (310) being fixed to the side of the cover plate body (10) facing the pole plate body (210) and being placed between the pole plate body (210) and the cover plate body (10).

7. The cover plate assembly as claimed in claim 5, characterized in that, The sealing ring (320) is a variable cross-section structure along its axial direction, and includes a thicker filling section (3210) and a thinner recessed section (3220). The fixing ring (40) is arranged around the outer wall of the recessed section (3220). The two ends of the filling section (3210) in the axial direction are respectively clamped by the fixing ring (40) and the pole plate (210), and the two ends of the fixing ring (40) in the axial direction are respectively clamped by the filling section (3210) and the locking section (230).

8. The cover plate assembly as claimed in claim 1, characterized in that, The cover plate body (10) is also provided with a second through hole (120), and the pole post (20) is installed in the first through hole (110) and the second through hole (120).

9. The cover plate assembly as claimed in claim 3, characterized in that, The fixing ring (40) is fixedly provided with an insulating gasket or sprayed with an insulating coating (50) on the side facing the locking section (230).

10. A battery cell module, characterized in that, Includes the cover plate assembly as described in any one of claims 1-9.

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