Top cover assembly, battery and electric equipment

Abstract

The utility model relates to a top cover assembly, a battery and electric equipment, and relates to the technical field of batteries, the top cover assembly comprises a cover plate, a pole, a support ring and a sealing ring, the pole is assembled on the cover plate; the support ring is sleeved on the outer side of the pole; a reserved gap is formed between a part of the inner wall of the supporting ring and the outer wall of the pole; the supporting ring is sleeved with the sealing ring, and at least part of the inner wall of the sealing ring abuts against the outer wall of the supporting ring. According to the top cover assembly, the battery and the electric equipment provided by the embodiment of the invention, the problem that the sealing ring is easy to extrude and break the pole column can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a top cover assembly, a battery, and an electrical device. Background Technology

[0002] In battery structure, a sealing ring is fitted onto the terminal post to prevent electrolyte leakage. Because there is no space between the sealing ring and the terminal post, when the sealing ring is compressed by external force, it can only deform outwards. This causes the compressive force to concentrate inside the sealing ring, resulting in a large compressive force on the terminal post, making it prone to breakage. Utility Model Content

[0003] To address the aforementioned technical problems, embodiments of this application provide a top cover assembly, a battery, and an electrical device that can improve the problem of the sealing ring easily squeezing and breaking the terminal post.

[0004] In a first aspect, a top cover assembly is provided, comprising:

[0005] Cover plate;

[0006] The pole is fitted onto the cover plate;

[0007] A support ring is fitted onto the outside of the pole post; wherein a reserved gap exists between a portion of the inner wall of the support ring and the outer wall of the pole post;

[0008] A sealing ring is fitted onto the outside of the support ring, and at least a portion of the inner wall of the sealing ring abuts against the outer wall of the support ring.

[0009] According to a first aspect of this application, the support ring has a weak portion, the strength of which is less than the strength of other parts of the support ring; wherein the weak portion is designed to deform or break when the sealing ring exerts a pressure on the support ring to a preset pressure threshold.

[0010] According to a first aspect of this application, the weak portion includes a perforated hole; or,

[0011] The thickness of the weak part is less than the thickness of the other parts of the support ring.

[0012] According to a first aspect of this application, the support ring includes a plurality of wave segments connected end to end, and the connection portion of two adjacent wave segments forms the weak part.

[0013] According to a first aspect of this application, after the weak part deforms or breaks, a portion of two adjacent wave segments overlaps, and multiple wave segments deform to form an isolation layer that covers the outside of the pole post.

[0014] According to a first aspect of this application, the isolation layer includes an overlapping portion and a connecting portion, wherein the thickness of the overlapping portion is equal to the thickness of the connecting portion; wherein the overlapping portion represents the portion that overlaps after deformation of two adjacent wave segments; and the connecting portion represents the portion that does not overlap after deformation of two adjacent wave segments.

[0015] According to a first aspect of this application, the isolation layer includes a first layer and a second layer, the first layer covering the outside of the pole post and the second layer covering the outside of the first layer.

[0016] According to a first aspect of this application, the outermost inner diameter of the support ring is A, and the innermost inner diameter of the support ring is B, wherein A and B satisfy: 0.5mm≤AB≤5mm.

[0017] Secondly, a battery is also provided, comprising:

[0018] The housing has a receiving cavity with an opening;

[0019] The battery cell is disposed within the receiving cavity;

[0020] As described in the previous embodiment, the top cover assembly is disposed on the top of the housing, and the top cover assembly is used to close the opening, and the electrode post is connected to the battery cell.

[0021] Thirdly, an electrical appliance is also provided, including:

[0022] The battery as described in the previous embodiment.

[0023] The top cover assembly provided in this application embodiment provides a deformation space for a portion of the inner wall of the support ring by sleeved between the pole post and the sealing ring and by utilizing the reserved gap between a portion of the inner wall of the support ring and the outer wall of the pole post. In this way, the reserved gap can buffer the pressure of the sealing ring on the support ring, reduce the compressive force exerted by the sealing ring on the pole post, and effectively improve the problem that the sealing ring is easily squeezed and broken by external force. Attached Figure Description

[0024] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0025] Figure 1 This is a schematic diagram of the structure of a top cover assembly provided for an exemplary embodiment of this application.

[0026] Figure 2 An exploded view of a top cover assembly provided for an exemplary embodiment of this application.

[0027] Figure 3 A partial cross-sectional view of a top cover assembly provided for an exemplary embodiment of this application.

[0028] Figure 4 A schematic diagram of the support ring provided in an exemplary embodiment of this application from a first perspective.

[0029] Figure 5 A schematic diagram of the support ring provided in an exemplary embodiment of this application from a second perspective.

[0030] Figure 6 A schematic diagram of the structure of a weak part after deformation or fracture, provided as an exemplary embodiment of this application, from a first-view perspective.

[0031] Figure 7 A schematic diagram of the structure of a weak part after deformation or fracture, provided as an exemplary embodiment of this application, from a second perspective.

[0032] Reference numerals: 100-Top cover assembly; 110-Cover plate; 120-Position post; 130-Support ring; 131-Weak section; 132-Wave section; 133-Isolation layer; 1331-Overlapping section; 1332-Connecting section; 1333-First layer; 1334-Second layer; 140-Sealing ring; 150-Insulating component. Detailed Implementation

[0033] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0034] Figure 1 This is a schematic diagram of the structure of a top cover assembly provided for an exemplary embodiment of this application. Figure 2 An exploded view of a top cover assembly provided for an exemplary embodiment of this application. Figure 3 A partial cross-sectional view of a top cover assembly provided for an exemplary embodiment of this application. Figures 1 to 3 As shown, the top cover assembly 100 provided in this application embodiment includes a cover plate 110, a pole post 120, a support ring 130, and a sealing ring 140. The pole post 120 is assembled on the cover plate 110 and can be used to connect external electrical components. The support ring 130 is sleeved on the outside of the pole post 120, and the sealing ring 140 is sleeved on the outside of the support ring 130. That is, the support ring 130 is sleeved between the sealing ring 140 and the pole post 120.

[0035] It should be noted that a reserved gap exists between a portion of the inner wall of the support ring 130 and the outer wall of the electrode post 120, and at least a portion of the inner wall of the sealing ring 140 abuts against the outer wall of the support ring 130. Under normal application conditions, the sealing ring 140 and the support ring 130 cooperate with each other, and the sealing ring 140 is used to prevent electrolyte leakage; when the sealing ring 140 is compressed by external force, the inner wall of the sealing ring 140 exerts a pressure against the outer wall of the support ring 130, and the reserved gap can provide deformation space for at least a portion of the inner wall of the support ring 130.

[0036] In other words, compared to the related technology where the inner wall of the sealing ring 140 directly presses against the pole post 120 when the sealing ring 140 is compressed by external force, the top cover assembly 100 provided in this application embodiment provides deformation space for a portion of the inner wall of the support ring 130 by sleeved between the pole post 120 and the sealing ring 140 and by utilizing the reserved gap between a portion of the inner wall of the support ring 130 and the outer wall of the pole post 120. In this way, the reserved gap can buffer the pressing action of the sealing ring 140 against the support ring 130, reduce the compressive force exerted by the sealing ring 140 on the pole post 120, and effectively improve the problem that the sealing ring 140 is easily squeezed and broken by external force.

[0037] It should be understood that the dimension of the reserved gap along the radial direction of the support ring 130 can be set according to the actual situation.

[0038] In one embodiment, the entire inner wall of the sealing ring 140 may abut against the outer wall of the support ring 130.

[0039] In one embodiment, a portion of the inner wall of the sealing ring 140 may abut against the outer wall of the support ring 130, while a gap may be formed between another portion of the inner wall of the sealing ring 140 and the outer wall of the support ring 130. This gap can also serve a similar function to the aforementioned reserved gap, buffering the compression effect on a portion of the inner wall of the sealing ring 140, reducing the compressive force exerted on the support ring 130 by the sealing ring 140, thereby further reducing the compressive force exerted on the pole post 120 by the sealing ring 140, and improving the problem that the sealing ring 140 is easily squeezed and broken by external force.

[0040] like Figure 2 and Figure 3 As shown, the top cover assembly 100 may also include an insulating element 150, which is located outside the terminal post 120 and is used to isolate the terminal post 120 from the cover plate 110. The insulating element 150 can prevent current conduction between the terminal post 120 and the cover plate 110, thereby improving the battery's performance.

[0041] Figure 4A schematic diagram of the support ring provided as an exemplary embodiment of this application from a first-view perspective. Figure 4 As shown, the support ring 130 is provided with a weak part 131, and the strength of the weak part 131 is less than the strength of other parts of the support ring 130 (which can be understood as the other parts of the support ring 130 other than the weak part 131).

[0042] It should be understood that as the pressure exerted by the sealing ring 140 on the support ring 130 increases, the weak part 131 will deform or break earlier than other parts of the support ring 130. Specifically, in practical applications, when the pressure exerted by the sealing ring 140 on the support ring 130 reaches a preset pressure threshold, the weak part 131 deforms or breaks. During the deformation or breakage process, the weak part 131 can absorb energy, that is, it can buffer the pressure exerted by the sealing ring 140, reduce the compressive force exerted by the sealing ring 140 on the support ring 130, and thus reduce the compressive force exerted by the sealing ring 140 on the pole post 120.

[0043] It should be understood that the preset pressure threshold is related to the material of the support ring 130 and the strength of the weak part 131. The preset pressure threshold can be determined according to the actual situation. This application embodiment does not specifically limit the preset pressure threshold.

[0044] In one embodiment, the number of weak parts 131 can be one, two, multiple, etc.

[0045] In one embodiment, there are multiple weak parts 131, which are distributed at intervals along the circumference of the support ring 130. The multiple weak parts 131 can play a buffering and energy absorption role in different directions.

[0046] In one embodiment, the weak portion 131 includes a hollow hole. That is, by providing a hollow hole in a portion of the support ring 130, the strength of that portion is less than the strength of other portions of the support ring 130, thus forming the aforementioned weak portion 131.

[0047] It should be noted that the number of perforations at the same weak point 131 can be one, two, or more.

[0048] In one embodiment, the thickness of the weak portion 131 is less than the thickness of the other portions of the support ring 130. In this way, during the continuous pressure applied to the support ring 130 by the sealing ring 140, it can be ensured that the weak portion 131 can break or deform before the other portions.

[0049] In one embodiment, during the manufacturing process of the support ring 130, a portion of the support ring 130 may be made of a material with lower strength, while other portions may be made of a material with higher strength. The portion corresponding to the material with lower strength may form the aforementioned weak portion 131.

[0050] like Figure 4 As shown, the support ring 130 includes multiple wave segments 132 connected end to end, with the connection point of two adjacent wave segments 132 forming a weak section 131. It should be understood that, on the one hand, the support ring 130 composed of multiple wave segments 132 ensures that the inner walls of different parts of the support ring 130 in the circumferential direction can form reserved gaps with the outer wall of the pole post 120. These reserved gaps in different directions can buffer the compression effect of the sealing ring 140 in different directions. On the other hand, the weak sections 131 between the multiple wave segments 132 are distributed along the circumference of the support ring 130, and these weak sections 131 can buffer and absorb energy in different directions.

[0051] It should be understood that the number of peaks and troughs included in each wave segment 132 can be set according to the actual situation, and this application does not make specific limitations on this.

[0052] In one embodiment, the lengths of the plurality of wave segments 132 may be equal or unequal.

[0053] Figure 5 A schematic diagram of the support ring provided as an exemplary embodiment of this application from a second perspective. Figure 5 As shown, the outermost inner diameter of the support ring 130 is A, and the innermost inner diameter of the support ring 130 is B. It should be understood that if the difference between the inner diameter A and the inner diameter B is too large, the reserved gap will occupy a large space, affecting the space utilization of the top cover assembly 100; if the difference between the inner diameter A and the inner diameter B is too small, the reserved gap will be too small, affecting the buffering effect of the reserved gap on the compressive force of the sealing ring 140.

[0054] Therefore, in this embodiment, the difference between the inner diameter A and the inner diameter B is limited to the following range: 0.5mm≤AB≤5mm. This ensures that the reserved gap provides a good buffering effect while reducing the impact of the reserved gap on the space utilization of the top cover assembly 100.

[0055] Figure 6 A schematic diagram of the structure of a weak part after deformation or fracture, provided as an exemplary embodiment of this application, from a first-view perspective. Figure 7 This is a schematic diagram of the structure from a second perspective after the weak part has deformed or fractured, as provided in an exemplary embodiment of this application. Figure 6 and Figure 7 As shown, when the support ring 130 includes multiple wave segments 132, when the sealing ring 140 is subjected to external pressure, the sealing ring 140 applies a compressive force to the support ring 130, causing the weak part 131 to deform or break, and the wave segments 132 will also deform accordingly.

[0056] Specifically, after the weak part 131 deforms or breaks, a portion of two adjacent wave segments 132 overlaps, and multiple wave segments 132 deform to form an isolation layer 133, which covers the outer side of the pole post 120. In this way, the isolation layer 133 effectively protects the pole post 120, preventing the inner wall of the sealing ring 140 from directly acting on the pole post 120. Furthermore, since the isolation layer 133 completely covers the outer periphery of the pole post 120, the force applied by the sealing ring 140 to the pole post 120 through the isolation layer 133 is more uniform, and stress concentration is less likely to occur on the outer wall of the pole post 120. At the same time, the force on the side of the sealing ring 140 near the pole post 120 is more uniform, and the deformation tends to be consistent.

[0057] like Figure 6 As shown, the isolation layer 133 includes an overlapping portion 1331 and a connecting portion 1332. The overlapping portion 1331 can be understood as the part that overlaps with each other after two adjacent wave segments 132 are deformed; the connecting portion 1332 can be understood as the part that does not overlap after two adjacent wave segments 132 are deformed.

[0058] Specifically, after multiple wave segments 132 deform, the thickness of the overlapping portion 1331 is equal to the thickness of the connecting portion 1332. In this way, along the circumference of the pole post 120, the compressive force applied by the sealing ring 140 to the outer wall of the pole post 120 through the overlapping portion 1331 is basically the same as the compressive force applied by the sealing ring 140 to the outer wall of the pole post 120 through the connecting portion 1332. This makes the compressive force on the outer wall of the pole post 120 more uniform, and stress concentration is less likely to occur on the outer wall of the pole post 120.

[0059] In practical applications, before the wave segment 132 deforms, the thickness of the corresponding overlapping part 1331 in the same wave segment 132 is usually set to half the thickness of the corresponding connecting part 1332. In this way, it can be ensured that the thickness of the overlapping part 1331 after the wave segment 132 deforms is equal to the thickness of the connecting part 1332.

[0060] It should be understood that the length of the overlapping portion 1331 and the length of the connecting portion 1332 can be set according to the situation. In this application embodiment, the length of the overlapping portion 1331 and the length of the connecting portion 1332 are not specifically limited.

[0061] like Figure 7 As shown, the isolation layer 133 includes a first layer 1333 and a second layer 1334. The first layer 1333 covers the outside of the pole post 120, and the second layer 1334 covers the outside of the first layer 1333. The inner wall of the sealing ring 140 and the outer wall of the second layer 1334 cooperate with each other.

[0062] It should be understood that the compressive force of the sealing ring 140 gradually decreases as it is transmitted from the second layer 1334 to the first layer 1333 and then from the first layer 1333 to the outer wall of the pole post 120. In other words, compared to the single-layer structure of the isolation layer 133, the double-layer structure of the isolation layer 133 can further reduce the compressive force of the sealing ring 140 on the pole post 120, and further weaken the compressive effect on the pole post 120.

[0063] This application embodiment also provides a battery, which may include a casing, a battery cell, and a top cover assembly 100. The casing has a receiving cavity with an opening, the battery cell is disposed in the receiving cavity, the top cover assembly 100 is disposed on the top of the casing, the top cover assembly 100 is used to close the opening, the top cover assembly 100 plays a protective role for the battery cell, and the terminal post 120 is connected to the battery cell.

[0064] The battery provided in this application embodiment includes the top cover assembly 100 as described above, which has all the functions of the top cover assembly 100, and its beneficial effects can be referred to the beneficial effects of the aforementioned top cover assembly 100.

[0065] This application also provides an electrical device that includes the battery described in the previous embodiment and has all the functions of the battery. The beneficial effects of this electrical device can be referenced from the beneficial effects of the aforementioned battery.

[0066] In one embodiment, the aforementioned electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, power tools, energy storage devices, amusement equipment, elevators, and lifting equipment, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, or electric airplane toys, etc.; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.; energy storage devices can be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment can be carousels, drop towers, etc. This application does not impose any special limitations on the aforementioned electrical equipment.

[0067] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0068] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0069] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0070] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0071] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A cap assembly, characterized by, The top cover assembly comprises: a cover plate (110); a pole column (120) assembled on the cover plate (110); a support ring (130) sleeved on the outside of the pole column (120); wherein a pre-reserved gap exists between the inner wall of a part of the support ring (130) and the outer wall of the pole column (120); a sealing ring (140) sleeved on the outside of the support ring (130), and at least part of the inner wall of the sealing ring (140) abuts against the outer wall of the support ring (130).

2. The roof assembly of claim 1, wherein, The support ring (130) is provided with a weak part (131), the strength of the weak part (131) is less than the strength of other parts of the support ring (130); wherein the weak part (131) is used for deforming or breaking when the pressing force of the sealing ring (140) on the support ring (130) reaches a preset pressure threshold.

3. The roof assembly of claim 2, wherein, The weak part (131) comprises a hollow hole; or The thickness of the weak part (131) is less than the thickness of other parts of the support ring (130).

4. The roof assembly of claim 2, wherein, The support ring (130) comprises a plurality of wave segments (132), the plurality of wave segments (132) are connected in a head-to-tail manner, and the connecting part of two adjacent wave segments (132) forms the weak part (131).

5. The roof assembly of claim 4, wherein, After the weak part (131) deforms or breaks, part of two adjacent wave segments (132) overlaps, and a plurality of wave segments (132) deform to form an isolation layer (133) covering the outside of the pole column (120).

6. The roof assembly of claim 5, wherein, The isolation layer (133) comprises an overlapping part (1331) and a connecting part (1332), the thickness of the overlapping part (1331) is equal to the thickness of the connecting part (1332); wherein the overlapping part (1331) represents the overlapping part after the deformation of two adjacent wave segments (132); and the connecting part (1332) represents the non-overlapping part after the deformation of two adjacent wave segments (132).

7. The roof assembly of claim 5, wherein, The isolation layer (133) comprises a first layer (1333) and a second layer (1334), the first layer (1333) covers the outside of the pole column (120), and the second layer (1334) covers the outside of the first layer (1333).

8. The roof assembly of claim 4, wherein, The inner diameter of the outermost side of the support ring (130) is A, the inner diameter of the innermost side of the support ring (130) is B, and the A and the B satisfy: 0.5mm≤A-B≤5mm.

9. A battery, characterized by The battery comprises: a shell provided with a containing cavity, the containing cavity having an opening; an electric core arranged in the containing cavity; the top cover assembly according to any one of claims 1 to 8 is arranged at the top of the shell, the top cover assembly is used for closing the opening, and the pole column (120) is connected with the electric core.

10. An electric device, characterized by The battery comprises: the battery according to claim 9.

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