Battery assembly and battery

Abstract

The utility model provides a battery pack and battery, battery pack includes pole, rubber seal ring and ceramic seal ring, pole includes bottom plate and protruding the top surface of bottom plate and with the pole body of bottom plate connection, rubber seal ring, ceramic seal ring and pole body are located the same side of bottom plate, the rubber seal ring is sealed and sleeved outside the pole body root, and the ceramic seal ring is sealed and sleeved outside the pole body root. And the ceramic sealing ring is arranged around the outer side of the rubber sealing ring. Due to the fact that the rubber sealing ring, the ceramic sealing ring and the column body are located on the same side of the bottom plate, the root of the column body is sleeved with the rubber sealing ring in a sealed mode, and the ceramic sealing ring is arranged on the outer side of the rubber sealing ring in a surrounding mode, the ceramic sealing ring can limit the compressed amount of the rubber sealing ring in the height direction of the column body. The compression ratio of the rubber sealing ring is kept at a relatively stable level, so that the sealing stability is improved, the ceramic sealing ring can block electrolyte, the risk that the electrolyte is in contact with the rubber sealing ring is reduced, and the service life of the rubber sealing ring is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery assembly and a battery. Background Art

[0002] The terminal is the component that connects the inside and outside of a power battery. One end of the terminal connects to the battery's external circuitry, and the other end connects to the battery's internal cells, enabling the battery's charge and discharge functions. The primary assembly requirements for the terminal in a power battery are to ensure insulation and sealing between the terminal and the baseplate. Currently, there are two main methods for assembling power battery terminals: threaded assembly and retaining spring assembly. Threaded assembly involves machining threads on the terminal and securing it to the top cover with a nut. This method requires threading and nuts, making the terminal complex, costly, inefficient, and resulting in excessive weight. Retaining spring assembly involves machining an annular retaining spring groove on the terminal. By fitting the retaining spring groove onto the retaining spring groove on the terminal, the terminal is secured to the baseplate and other components, preventing axial movement. This method carries the risk of improperly assembled retaining springs, leading to loosening of the terminal and resulting in a short circuit.

[0003] To address the aforementioned issues, a pole assembly has been designed, comprising a base plate and a pole. The base plate is provided with a pole hole. The pole comprises a bottom plate and a column. A rubber seal is provided at the corner between the bottom plate and the column. The column enters the pole hole, and the base plate presses the rubber seal toward the bottom plate of the pole. However, while this pole assembly can improve pole assembly efficiency, increase pole assembly reliability, simplify the pole structure, and reduce product costs, it still has the following shortcomings:

[0004] During the assembly of the pole assembly, the different abutment forces of the substrate on the rubber sealing ring will lead to different compression rates of the rubber sealing ring, which in turn leads to poor sealing stability of the pole assembly. When the sealing is poor, the rubber sealing ring will come into contact with the electrolyte during use, which will reduce the service life of the rubber sealing ring.

[0005] In view of the above-mentioned shortcomings, it is necessary to design a new pole assembly and battery. Utility Model Content

[0006] Therefore, the technical problem to be solved by the present invention is that in the existing pole assembly, the compression rate of the rubber sealing ring is different due to the different abutment forces of the substrate on the rubber sealing ring during the assembly process, which ultimately leads to poor sealing stability of the pole assembly. When the sealing is poor, the rubber sealing ring will come into contact with the electrolyte during use, which will also reduce the service life of the rubber sealing ring, thereby providing a pole assembly and a battery.

[0007] In order to solve the above technical problems, the technical solutions of the present utility model are as follows:

[0008] A battery assembly includes a pole, a rubber sealing ring and a ceramic sealing ring. The pole includes a base plate and a column protruding from the top surface of the base plate and connected to the base plate. The rubber sealing ring, the ceramic sealing ring and the column are located on the same side of the base plate. The rubber sealing ring is sealingly sleeved on the outside of the root of the column, and its bottom surface is against the top surface of the base plate. The ceramic sealing ring is installed on the base plate and is arranged around the outside of the rubber sealing ring.

[0009] Furthermore, the top surface of the bottom plate is inwardly recessed to form a receiving groove, and the ceramic sealing ring is placed in the receiving groove.

[0010] Furthermore, the cross section of the bottom plate is square, the receiving groove is annular, the center of the receiving groove coincides with the center of the bottom plate, and the outer ring of the receiving groove is tangent to the side wall of the bottom plate.

[0011] Furthermore, it also includes a substrate, which is provided with a pole hole. The column passes through the pole hole from one side of the substrate and protrudes from the other opposite side of the substrate. The ceramic sealing ring is clamped between the substrate and the bottom plate.

[0012] Furthermore, the surface of the substrate that abuts the ceramic sealing ring and the surface of the substrate that abuts the rubber sealing ring are coplanar and perpendicular to the axis of the column, and the top surface of the ceramic sealing ring is lower than the top surface of the rubber sealing ring.

[0013] Furthermore, the diameter of the pole hole is larger than the diameter of the column, and part of the rubber sealing ring fills the gap between the hole wall of the pole hole and the side wall of the column.

[0014] Furthermore, the rubber sealing ring, the ceramic sealing ring and the pole hole are coaxially arranged.

[0015] Furthermore, it also includes an upper plastic part arranged on the top surface of the substrate and a lower plastic part arranged on the bottom surface of the substrate, the upper plastic part is provided with an upper through hole, the head of the column enters the upper through hole, the lower plastic part is provided with a lower through hole, the bottom plate enters the lower through hole.

[0016] Furthermore, the bottom surface of the upper plastic part is recessed inward to form an annular groove, and the top surface of the base plate protrudes outward to extend to form an annular convex rib, and the groove wall adjacent to the column is radially protruded and extended in the direction away from the column to form a plurality of first engaging teeth, and the convex rib is radially protruded and extended toward the side wall of the column in the direction of the column to form a plurality of second engaging teeth, and the plurality of first engaging teeth and the plurality of second engaging teeth are respectively arranged around the column, the convex rib is engaged with the groove, and the first engaging teeth and the second engaging teeth are engaged with each other.

[0017] The technical solution of this utility model has the following advantages:

[0018] 1. In the battery assembly provided by the present invention, since the rubber sealing ring, the ceramic sealing ring and the column are located on the same side of the base plate, the rubber sealing ring is sealingly sleeved on the outside of the root of the column, and its bottom surface is against the top surface of the base plate, and the ceramic sealing ring is installed on the base plate and is arranged around the outside of the rubber sealing ring. Therefore, the ceramic sealing ring can limit the amount of compression of the rubber sealing ring along the height direction of the column, ensuring that the compression rate of the rubber sealing ring is maintained at a relatively stable level, thereby improving the sealing stability, and the ceramic sealing ring can also block the electrolyte, reduce the risk of contact between the electrolyte and the rubber sealing ring, and extend the service life of the rubber sealing ring. In addition, the ceramic sealing ring and the rubber sealing ring can form a double sealing effect, further improving the sealing effect of the battery assembly.

[0019] 2. The battery assembly provided by the present invention has a base plate with a square cross-section and a circular receiving groove. The center of the receiving groove coincides with the center of the base plate, and the outer ring of the receiving groove is arranged tangent to the side wall of the base plate. When the size of the ceramic sealing ring remains the same, the size of the base plate can be reduced, thereby reducing the material cost of the base plate. Reducing the size of the base plate is also conducive to making room for the arrangement of other components in the battery.

[0020] 3. In the battery assembly provided by the present invention, the surface on the substrate that abuts the ceramic sealing ring and the surface on the substrate that abuts the rubber sealing ring are arranged on the same plane and are both perpendicular to the axis of the column. The top surface of the ceramic sealing ring is lower than the top surface of the rubber sealing ring. Such a design can simplify the design of the substrate and facilitate the processing of the substrate.

[0021] 4. The battery assembly provided by the present invention has a bottom surface of the upper plastic part that is recessed inward to form an annular groove, a top surface of the base plate that protrudes outward to extend to form an annular convex rib, a groove wall adjacent to the column on the groove that radially protrudes and extends away from the column to form a plurality of first engaging teeth, and a side wall of the convex rib that radially protrudes and extends toward the column is provided with a plurality of second engaging teeth, the plurality of first engaging teeth and the plurality of second engaging teeth are respectively arranged around the column, the convex rib is engaged with the groove, and the first engaging teeth and the second engaging teeth are engaged with each other, thereby further improving the airtightness performance of the battery assembly.

[0022] A battery comprises the aforementioned battery assembly.

[0023] The technical solution of this utility model has the following advantages:

[0024] The battery provided by the utility model has all the advantages of the aforementioned battery components. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 is a three-dimensional schematic diagram of a battery assembly in an embodiment of the present utility model;

[0027] Figure 2 is another perspective schematic diagram of a battery assembly in an embodiment of the present utility model;

[0028] Figure 3 Schematic top view of a battery assembly in an embodiment of the present invention;

[0029] Figure 4 For the Figure 3 Schematic diagram of the cross section along line A-A;

[0030] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0031] Figure 6 This is a three-dimensional schematic diagram of the cooperation between the pole, the rubber sealing ring and the ceramic sealing ring in the embodiment of the utility model;

[0032] Figure 7 This is a three-dimensional schematic diagram of an embodiment of the present invention with the upper plastic part on the right side removed;

[0033] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0034] Figure 9 This is a three-dimensional schematic diagram of the upper plastic part in the embodiment of the utility model;

[0035] Figure 10 It is a three-dimensional schematic diagram of the lower plastic part in the embodiment of the present utility model.

[0036] Description of reference numerals:

[0037] 1. Pole; 11. Bottom plate; 111. Receiving groove; 12. Column; 121. Root; 2. Rubber sealing ring; 3. Ceramic sealing ring; 4. Base plate; 41. Pole hole; 42. Rib; 43. Second engaging tooth; 5. Upper plastic part; 50. Upper through hole; 51. Groove; 52. First engaging tooth; 53. Annular rib; 6. Lower plastic part; 61. Lower through hole. DETAILED DESCRIPTION

[0038] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0039] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0042] Example 1

[0043] like Figures 1 to 10 As shown, this embodiment is a battery assembly, including a pole 1, a rubber sealing ring 2 and a ceramic sealing ring 3. The pole 1 includes a bottom plate 11 and a column 12 protruding from the top surface of the bottom plate 11 and connected to the bottom plate 11. The rubber sealing ring 2, the ceramic sealing ring 3 and the column 12 are located on the same side of the bottom plate 11. The rubber sealing ring 2 is sealed and sleeved with the root 121 of the column 12 (as shown in FIG. Figure 5 As shown), the bottom surface of the ceramic sealing ring 3 is against the top surface of the bottom plate 11, and the ceramic sealing ring 3 is mounted on the bottom plate 11 and surrounds the outer side of the rubber sealing ring 2.

[0044] In this embodiment, since the rubber sealing ring 2, the ceramic sealing ring 3 and the column 12 are located on the same side of the base plate 11, the rubber sealing ring 2 is sealed and sleeved outside the root 121 of the column 12, and its bottom surface is against the top surface of the base plate 11. The ceramic sealing ring 3 is installed on the base plate 11 and is arranged around the outside of the rubber sealing ring 2. Therefore, the ceramic sealing ring 3 can limit the amount of compression of the rubber sealing ring 2 along the height direction of the column 12, ensuring that the compression rate of the rubber sealing ring 2 remains at a relatively stable level, thereby improving the sealing stability, and the ceramic sealing ring 3 can also block the electrolyte, reduce the risk of contact between the electrolyte and the rubber sealing ring 2, and extend the service life of the rubber sealing ring 2. In addition, the ceramic sealing ring 3 and the rubber sealing ring 2 can form a double sealing effect, further improving the sealing effect of the battery assembly.

[0045] Furthermore, the top surface of the bottom plate 11 is inwardly recessed to form a receiving groove 111 (such as Figure 6 As shown in FIG, the ceramic sealing ring 3 is placed in the receiving groove 111. In this embodiment, the cross-section of the bottom plate 11 is square, and the receiving groove 111 is annular. The center of the receiving groove 111 coincides with the center of the bottom plate 11, and the outer ring of the receiving groove 111 is arranged tangentially to the side wall of the bottom plate 11. In this way, while the size of the ceramic sealing ring 3 remains the same, the size of the bottom plate 11 can be reduced, thereby reducing the material cost of the bottom plate 11. Reducing the size of the bottom plate 11 also helps to make room for the arrangement of other components in the battery.

[0046] Furthermore, it also includes a base plate 4, which is in the shape of a flat plate and has an overall rectangular parallelepiped structure. The base plate 4 is provided with a pole hole 41 with a circular cross-section. The column 12 passes through the pole hole 41 from one side of the base plate 4 and protrudes from the other opposite side of the base plate 4. The ceramic sealing ring 3 is sandwiched between the base plate 4 and the bottom plate 11. During the assembly process, the base plate 4 is pressed and moved toward the bottom plate 11. Due to the presence of the ceramic sealing ring 3, after the base plate 4 moves a preset distance, it will be resisted by the ceramic sealing ring 3 and cannot continue to move toward the bottom plate 11. In this way, the high consistency of the ceramic sealing ring 3 can ensure the consistency of the compression rate of the rubber sealing ring 2, ultimately improving the sealing stability of the battery assembly.

[0047] Preferably, the surface of the substrate 4 that abuts the ceramic sealing ring 3 and the surface of the substrate 4 that abuts the rubber sealing ring 2 are coplanar and both are perpendicular to the axis of the column 12. This simplifies the design of the substrate 4 and facilitates its processing. When the surface of the substrate 4 that abuts the ceramic sealing ring 3 and the surface of the substrate 4 that abuts the rubber sealing ring 2 are coplanar and both are perpendicular to the axis of the column 12, the top surface of the ceramic sealing ring 3 is designed to be lower than the top surface of the rubber sealing ring 2, so that the substrate 4 can press the rubber sealing ring 2 toward the bottom plate 11. Of course, the top surface of the ceramic sealing ring 3 can also be higher than the top surface of the rubber sealing ring 2. In this case, the surface of the substrate 4 that abuts the ceramic sealing ring 3 will be higher than the surface of the substrate 4 that abuts the rubber sealing ring 2, so that the substrate 4 can press the rubber sealing ring 2 toward the bottom plate 11.

[0048] Furthermore, the diameter of the pole hole 41 is larger than the diameter of the column 12, so as to ensure that part of the rubber sealing ring 2 enters the gap between the hole wall of the pole hole 41 and the side wall of the column 12 and fills the gap. In addition, preferably, the rubber sealing ring 2, the ceramic sealing ring 3 and the pole hole 41 are coaxially arranged.

[0049] Furthermore, it also includes an upper plastic part 5 provided on the top surface of the substrate 4, and an upper through hole 50 is provided on the upper plastic part 5, and the head of the column 12 (the head is the end opposite to the root 121) enters the upper through hole 50 (such as Figure 9 In this embodiment, the head protrudes from the top surface of the base plate 41. Specifically, the bottom surface of the upper plastic part 5 is inwardly recessed toward the base plate 4 to form an annular groove 51 (as shown in FIG. Figure 9 As shown), the base plate 4 is provided with an annular rib 42 protruding outwards toward the top surface of the upper plastic part 5 (as shown). Figure 5 As shown), the rib 42 is engaged with the groove 51. Preferably, the groove 51 is radially extended from the groove wall adjacent to the column 12 in the direction away from the column 12 to form a plurality of first engaging teeth 52 (as shown). Figure 9As shown), a plurality of first engaging teeth 52 are arranged around the column 12, and correspondingly, a plurality of second engaging teeth 43 (as shown) are provided on the side wall of the rib 42 facing the column 12 and extending radially toward the column 12. Figure 8 As shown), a plurality of second engaging teeth 43 are arranged around the column 12. When the upper plastic part 5 and the base plate 4 are assembled together, the first engaging teeth 52 and the second engaging teeth 43 engage with each other, further improving the airtightness of the battery assembly. In addition, the bottom surface of the upper plastic part 5 is provided with an annular rib 53 extending toward the base plate 4 (as shown). Figure 5 As shown), the annular rib 53 fills the gap between the pole hole 41 and the column 12, and is against the top surface of the rubber sealing ring 2, so that the entire rubber sealing ring 2 is in a relatively closed environment, further shortening its aging rate and improving the service life of the rubber sealing ring 2.

[0050] Furthermore, it also includes a lower plastic part 6 provided on the bottom surface of the substrate 4, and a lower through hole 61 is provided on the lower plastic part 6, and the bottom plate 11 enters the lower through hole 61 (such as Figure 10 As shown in FIG, in this embodiment, the bottom plate 11 protrudes from the bottom surface of the lower plastic part 6.

[0051] In this embodiment, a battery assembly includes a substrate 4 , two upper plastic parts 5 , two lower plastic parts 6 , and two poles 1 . Accordingly, two pole holes 41 are formed on one substrate 4 .

[0052] Example 2

[0053] A battery comprising the battery assembly of embodiment 1 (such as Figures 1 to 10 The battery in this embodiment is a power battery for a new energy vehicle, and of course it can also be other power batteries.

[0054] The battery provided in this embodiment has all the advantages of the battery assembly in Example 1.

[0055] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A battery assembly, characterized in that: The invention comprises a pole (1), a rubber sealing ring (2) and a ceramic sealing ring (3); the pole (1) comprises a base plate (11) and a column (12) protruding from the top surface of the base plate (11) and connected to the base plate (11); the rubber sealing ring (2), the ceramic sealing ring (3) and the column (12) are located on the same side of the base plate (11); the rubber sealing ring (2) is sealingly sleeved outside the root (121) of the column (12), and its bottom surface abuts against the top surface of the base plate (11); the ceramic sealing ring (3) is mounted on the base plate (11) and is arranged around the outside of the rubber sealing ring (2).

2. The battery assembly according to claim 1, wherein: The top surface of the bottom plate (11) is inwardly recessed to form a receiving groove (111), and the ceramic sealing ring (3) is placed in the receiving groove (111).

3. The battery assembly according to claim 2, wherein: The cross section of the bottom plate (11) is square, the receiving groove (111) is annular, the center of the receiving groove (111) coincides with the center of the bottom plate (11), and the outer ring of the receiving groove (111) is tangent to the side wall of the bottom plate (11).

4. The battery assembly according to claim 1, wherein: The invention also includes a base plate (4), wherein a pole hole (41) is provided on the base plate (4), the column (12) passes through the pole hole (41) from one side of the base plate (4) and protrudes from the other opposite side of the base plate (4), and the ceramic sealing ring (3) is sandwiched between the base plate (4) and the bottom plate (11).

5. The battery assembly according to claim 4, characterized in that The surface of the substrate (4) that contacts the ceramic sealing ring (3) and the surface of the substrate (4) that contacts the rubber sealing ring (2) are coplanar and perpendicular to the axis of the column (12). The top surface of the ceramic sealing ring (3) is lower than the top surface of the rubber sealing ring (2).

6. The battery assembly according to claim 4, characterized in that The diameter of the pole hole (41) is greater than the diameter of the column (12), and part of the rubber sealing ring (2) enters and fills the gap between the hole wall of the pole hole (41) and the side wall of the column (12).

7. The battery assembly according to claim 4, characterized in that The rubber sealing ring (2), the ceramic sealing ring (3) and the pole hole (41) are coaxially arranged.

8. The battery assembly according to any one of claims 4 to 7, characterized in that: The invention also includes an upper plastic part (5) provided on the top surface of the substrate (4) and a lower plastic part (6) provided on the bottom surface of the substrate (4), wherein the upper plastic part (5) is provided with an upper through hole (50), and the head of the column (12) enters the upper through hole (50), and the lower plastic part (6) is provided with a lower through hole (61), and the bottom plate (11) enters the lower through hole (61).

9. The battery assembly according to claim 8, characterized in that The bottom surface of the upper plastic part (5) is recessed inward to form an annular groove (51), and the top surface of the base plate (4) protrudes outward to form an annular convex rib (42). The groove (51) is adjacent to the groove wall of the column (12), and radially protrudes and extends in a direction away from the column (12) to form a plurality of first engaging teeth (52). The convex rib (42) is radially protruded and extended in the direction of the column (12) toward the side wall of the column (12) to form a plurality of second engaging teeth (43). The plurality of first engaging teeth (52) and the plurality of second engaging teeth (43) are respectively arranged around the column (12), the convex rib (42) is engaged with the groove (51), and the first engaging teeth (52) and the second engaging teeth (43) are engaged with each other.

10. A battery, characterized in that: A battery assembly comprising the battery assembly according to any one of claims 1 to 9.

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