Battery top cover assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery top cover assembly and a battery. The battery top cover assembly comprises a top cover sheet; the base plate and the top cover piece are arranged in a stacked mode, and the side plate is arranged on the side, away from the top cover piece, of the base plate and connected through a clamping assembly; the clamping assembly comprises a first clamping structure and a second clamping structure, one of the base plate and the side plate is provided with the first clamping structure, and the other one of the base plate and the side plate is provided with the second clamping structure; the second clamping structure is provided with a first clamping part which is pre-clamped with the first clamping structure and a second clamping part which is stably clamped with the first clamping structure; the base plate and the side plate can slide relative to each other, so that the first clamping structure is switched from pre-clamping with the first clamping part to stable clamping with the second clamping part. According to the utility model, the clamping structure between the side plate and the substrate is improved, so that the clamping matching is facilitated, the problems that the clamping is not firm and the clamping assembly is tripped or bounced off in the use process can be prevented, and the product reliability is higher.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a battery top cover assembly and a battery. Background Technology

[0002] With the widespread application and promotion of lithium batteries and other battery products in various fields, battery safety has become one of the key factors affecting battery performance. In existing battery products, there is a possibility of reverse insertion of the tabs during use, posing a safety hazard. Once reverse insertion occurs, it will significantly impact the safety performance of the battery product. Currently, existing technologies use methods such as adding reserved space for tab bending or adding side wing plates (e.g., flip-up side wing plate structures) in the top cover assembly to prevent reverse insertion. However, in practical applications, adding reserved space for tab bending requires occupying effective space within the battery. Furthermore, the side wing plate method is prone to problems such as insecure engagement, disengagement, or popping open, affecting battery safety performance, production efficiency, and increasing product defect rates. Utility Model Content

[0003] In view of this, in order to improve at least one of the above-mentioned problems existing in the prior art, the present invention provides a battery top cover assembly and a battery.

[0004] The present invention provides a battery top cover assembly, comprising: a top cover sheet; an insulating component including a substrate and a side plate, wherein the substrate and the top cover sheet are stacked, and the side plate is disposed on the side of the substrate away from the top cover sheet; the side plate and the substrate are connected by a snap-fit ​​assembly; wherein the snap-fit ​​assembly includes a first snap-fit ​​structure and a second snap-fit ​​structure, wherein one of the substrate and the side plate is provided with the first snap-fit ​​structure, and the other is provided with the second snap-fit ​​structure; the second snap-fit ​​structure has a first snap-fit ​​portion that is pre-snap-fitted with the first snap-fit ​​structure and a second snap-fit ​​portion that is securely snap-fitted with the first snap-fit ​​structure; the substrate and the side plate are slidable relative to each other, so that the first snap-fit ​​structure switches from pre-snap-fitted with the first snap-fit ​​portion to securely snap-fitted with the second snap-fit ​​portion.

[0005] In one feasible implementation, the snap-fit ​​assembly further includes at least one support block; in the base plate and side plate, one is fixedly connected to one end of the support block, and the other abuts against the other end of the support block.

[0006] In one feasible implementation, in the state where the first snap-fit ​​structure and the second snap-fit ​​part are securely snapped together, the second snap-fit ​​part has a first contact surface that can abut against the first snap-fit ​​structure; the substrate has a first surface facing the side plate, and the side plate has a second surface facing the substrate; in the third direction, the distance between the first contact surface and the first surface of the substrate is d, the distance between the first contact surface and the second surface of the side plate is b, the height of the support block is a, and the third direction is the thickness direction of the substrate, wherein a > b + d.

[0007] In one feasible implementation, the first snap-fit ​​structure has a receiving cavity, both ends of which penetrate the first snap-fit ​​structure along a first direction, the first direction being the length direction of the substrate; one end of the first snap-fit ​​structure that can abut against the second snap-fit ​​structure is provided with a latch, the latch communicating with the receiving cavity, and both ends of the latch penetrating the first snap-fit ​​structure along the first direction; wherein, in the pre-snap-fit ​​state of the first snap-fit ​​structure and the first snap-fit ​​part, at least a portion of the first snap-fit ​​part extends into the receiving cavity through the latch and is slidably engaged with the receiving cavity; in the stable snap-fit ​​state of the first snap-fit ​​structure and the second snap-fit ​​part, at least a portion of the second snap-fit ​​part cannot extend out of the receiving cavity through the latch and is slidably engaged with the receiving cavity.

[0008] In one feasible implementation, the first snap-fit ​​structure includes two connecting arms arranged opposite each other along a second direction. Each connecting arm is provided with a hook, which is configured to abut against the second snap-fit ​​when the first snap-fit ​​structure and the second snap-fit ​​are securely snapped together. The two hooks are arranged opposite each other along the second direction, and a bayonet is formed between the two hooks. An accommodating cavity is formed between the two connecting arms, and the second direction is the width direction of the substrate.

[0009] In one feasible implementation, the minimum spacing of the latches in the second direction is h1, and the length of the accommodating cavity in the first direction is w1; the maximum width of the first latching part in the second direction is h2, and the length of the first latching part in the first direction is w2; the maximum width of the second latching part in the second direction is d1; and the minimum width of the accommodating cavity in the second direction is h3; wherein, w1≤w2, h2 <d1≤h3,-0.1mm 0.4mm.

[0010] In one feasible implementation, the second snap-fit ​​structure further includes a support and a snap-fit ​​rod, the snap-fit ​​rod extending along a first direction and connected to the support, the snap-fit ​​rod having a first snap-fit ​​portion and a second snap-fit ​​portion disposed along the first direction.

[0011] In one feasible implementation, the first snap-fit ​​portion has a first plane and a second plane that are opposite and parallel to each other in a second direction, and the distance between the first plane and the second plane is h2; the first snap-fit ​​portion is connected to the second snap-fit ​​portion at least one end along the first direction, and the second snap-fit ​​portion has a first abutting surface, which is perpendicular to the third direction; the width of the first abutting surface in the second direction is d1.

[0012] In one feasible implementation, there are two second latching parts, which are respectively connected to the two ends of the first latching part in the first direction.

[0013] The second aspect of this utility model provides a battery, including: the battery top cover assembly of any of the first aspects described above.

[0014] The beneficial effects of the above-mentioned technical solution of this utility model are reflected in:

[0015] The structure and engagement method of the snap-fit ​​assembly between the side plate and the base plate have been improved. This allows the first snap-fit ​​structure and the second snap-fit ​​structure to switch from a pre-snap-fit ​​state to a secure snap-fit ​​state. In the secure snap-fit ​​state, the snap-fit ​​cannot be directly released. This facilitates snap-fit ​​engagement and prevents problems such as loose snap-fit, snap-fit ​​assembly disengagement or pop-out during use. The product has higher reliability and is conducive to improving the safety of battery products and production efficiency. Attached Figure Description

[0016] Figure 1 The diagram shown is a partially exploded view of a battery top cover assembly according to an embodiment of the present invention.

[0017] Figure 2 The diagram shown is a schematic diagram of the bottom structure of an insulating component according to an embodiment of the present invention.

[0018] Figure 3 As shown Figure 1 An enlarged schematic diagram of part A in the diagram.

[0019] Figure 4 The diagram shown is a schematic diagram of a substrate provided in one embodiment of the present invention.

[0020] Figure 5 The diagram shown is a schematic diagram of a side plate provided in one embodiment of the present invention.

[0021] Figure 6 As shown Figure 1 A cross-sectional view along the FF direction.

[0022] Figure 7 As shown Figure 6 An enlarged schematic diagram of part B in the diagram.

[0023] Figure 8 As shown Figure 7 The diagram shows the snap-fit ​​component in a secure snap-fit ​​state.

[0024] Figure 9 The diagram shown is a schematic diagram of the second surface of a side plate according to an embodiment of the present invention.

[0025] Figure 10 As shown Figure 9 A cross-sectional view along the CC direction.

[0026] Figure 11 As shown Figure 9 A cross-sectional view along the DD direction.

[0027] Figure 12 The diagram shown is a schematic diagram of the first surface of a substrate provided in one embodiment of the present invention.

[0028] Figure 13 As shown Figure 12 A cross-sectional view along the EE direction.

[0029] Figure 14 The diagram shown is a schematic diagram of a snap-fit ​​rod provided in one embodiment of the present invention.

[0030] Figure 15 The image shown is a cross-sectional view (pre-connection state) of a battery according to an embodiment of the present invention.

[0031] Figure 16 As shown Figure 15 An enlarged schematic diagram of part G in the diagram.

[0032] Figure 17 The image shown is a cross-sectional view (securely snapped in position) of a battery according to an embodiment of the present invention.

[0033] Figure 18 As shown Figure 17 An enlarged schematic diagram of part H in the diagram.

[0034] Figure 19 The diagram shown is an exploded view of a battery according to an embodiment of the present invention (side plate in the assembly position).

[0035] Figure 20 The diagram shown is an exploded view of a battery according to an embodiment of the present invention (the side plate is in the position before assembly).

[0036] In the above-mentioned figures, arrow F1 indicates the first direction, arrow F2 indicates the second direction, and arrow F3 indicates the third direction.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100 battery top cover assembly;

[0039] 10 Top cover sheet; 20 Insulating component; 21 Substrate; 211 Hollow structure; 213 First surface; 22 Side plate; 221 First opening structure; 222 Second surface;

[0040] 3. Snap-fit ​​assembly, 31. First snap-fit ​​structure, 311. Bayonet, 312. Receiving cavity, 313. Connecting arm, 314. Hook, 315. Support block, 32. Second snap-fit ​​structure, 321. Support, 322. Snap-fit ​​rod, 3221. First snap-fit ​​part, 3222. Second snap-fit ​​part, 3223. First plane, 3224. Second plane, 3225. Third plane, 3226. Fourth plane, 3227. First abutment surface;

[0041] 401 Plastic coating, 402 Sealing ring, 403 Terminal post, 404 Adapter plate, 405 Battery cell, 406 Insulating film, 407 Base plate, 408 Housing, 409 Explosion-proof valve patch, 410 Explosion-proof valve. Detailed Implementation

[0042] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, top, bottom, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the figures). If the specific posture changes, the directional indication will also change accordingly. 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 is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0043] Furthermore, the reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] The following provides some embodiments of the battery top cover assembly and battery in the technical solution of this utility model.

[0046] It should be noted that in the embodiments below, the first direction is the length direction of the substrate, the second direction is the width direction of the substrate, and the third direction is the thickness direction of the substrate, which will not be repeated below.

[0047] In one embodiment of this utility model, a battery top cover assembly 100 is provided, such as... Figure 1 , Figure 2 and Figure 3 As shown, it includes a top cover sheet 10 and an insulating member 20. The insulating member 20 includes a substrate 21, a side plate 22, and a snap-fit ​​assembly 3. The substrate 21 is located on one side of the top cover sheet 10 and is stacked on top of the top cover sheet 10; the side plate 22 is located on the side of the substrate 21 away from the top cover sheet 10, and the side plate 22 is connected to the substrate 21 by the snap-fit ​​assembly 3. The snap-fit ​​assembly 3 includes a first snap-fit ​​structure 31 and a second snap-fit ​​structure 32 that are adapted to each other. In the substrate 21 and the side plate 22, one of them is provided with the first snap-fit ​​structure 31, and the other is provided with the second snap-fit ​​structure 32. The second snap-fit ​​structure 32 has a first snap-fit ​​portion 3221 and a second snap-fit ​​portion 3222. The first snap-fit ​​portion 3221 can be pre-engaged with the first snap-fit ​​structure 31 (e.g., ...). Figure 15 and Figure 16 (as shown in the diagram), the second snap-fit ​​portion 3222 can be securely snapped into the first snap-fit ​​structure 31 (as shown in the diagram). Figure 17 and Figure 18 (as shown in the diagram); the substrate 21 and the side plate 22 can slide relative to each other (e.g., as shown in the diagram). Figure 2 (Slide along the first direction) to switch the first locking structure 31 from the pre-locking state with the first locking part 3221 to the stable locking state with the second locking part 3222. Of course, it can also be switched from the stable locking state with the second locking part 3222 to the pre-locking state with the first locking part 3221 by sliding in the opposite direction.

[0048] It should be noted that in the pre-locked state, the first locking structure 31 and the first locking part 3221 are engaged but not locked; in the secure locking state, the first locking structure 31 and the second locking part 3222 are engaged, and at this time the first locking structure 31 and the second locking part 3222 are locked, and the locking state cannot be easily released.

[0049] During the assembly process, the separate side plate 22 can be aligned with the base plate 21 first, that is, the first snap-fit ​​part 3221 of the first snap-fit ​​structure 31 and the second snap-fit ​​structure 32 can be aligned. Then, through corresponding operations, the first snap-fit ​​structure 31 and the first snap-fit ​​part 3221 can be pre-attached, so that the side plate 22 and the base plate 21 can be connected first. After that, the side plate 22 and the base plate 21 can be operated to slide relative to each other, so that the first snap-fit ​​structure 31 can be switched to cooperate with the second snap-fit ​​part 3222, thereby forming a stable snap-fit ​​state.

[0050] It is understandable that the snap-fit ​​structure commonly used in existing battery products only includes structures that can be pre-snap, similar to the first snap-fit ​​structure 31 and the first snap-fit ​​part 3221 in this embodiment. During use, the snap-fit ​​structure is prone to problems such as disengagement or popping open due to processing errors.

[0051] The battery top cover assembly 100 in this embodiment improves the structure and engagement method of the snap-fit ​​assembly 3 between the side plate 22 and the base plate 21. This allows the first snap-fit ​​structure 31 and the second snap-fit ​​structure 32 to switch from a pre-snap-fit ​​state to a stable snap-fit ​​state. In the stable snap-fit ​​state, the snap-fit ​​cannot be directly released. This facilitates snap-fit ​​engagement and prevents problems such as loose snap-fit, disengagement, or pop-out of the snap-fit ​​assembly during use. As a result, the product has higher reliability and is conducive to improving the safety and production efficiency of battery products.

[0052] In a further embodiment of this utility model, such as Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the snap-fit ​​assembly 3 also includes a support block 315, which is disposed between the substrate 21 and the side plate 22, and the number of support blocks 315 can be one or more. In the substrate 21 and the side plate 22, one is fixedly connected to one end of the support block 315, and the other abuts against the other end of the support block 315, for example... Figure 8 In the example, the support block 315 extends along a third direction, with one end fixedly connected to the substrate 21 and the other end abutting against the side plate 22. Through the supporting effect of the support block 315, the first snap-fit ​​structure 31 and the second snap-fit ​​part 3222 cannot easily slide relative to each other, thereby ensuring that the first snap-fit ​​structure 31 and the second snap-fit ​​part 3222 remain in a stable snap-fit ​​state.

[0053] Furthermore, such as Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13As shown, in the third direction, the substrate 21 has a first surface 213 facing the side plate 22, and the side plate 22 has a second surface 222 facing the substrate 21. The second latching portion 3222 has a first abutting surface 3227. When the first latching structure 31 and the second latching portion are securely latched, the first abutting surface 3227 of the second latching portion 3222 abuts against the first latching structure 31. In the third direction, the distance between the first abutting surface 3227 and the first surface 213 of the substrate 21 is d, the distance between the first abutting surface 3227 and the second surface 222 of the side plate 22 is b, and the height of the support block 315 in the third direction is a. The three satisfy the relationship a > b + d. When the first snap-fit ​​structure 31 and the second snap-fit ​​part 3222 are in a stable snap-fit ​​state, the support block 315 generates a thrust in the first direction on the side plate 22 and the base plate 21, so that the first abutting surface 3227 and the first snap-fit ​​structure 31 are in a pressed state, thereby increasing the friction of the first abutting surface 3227, and thus making the snap-fit ​​between the first snap-fit ​​structure 31 and the second snap-fit ​​part 3222 more secure.

[0054] The difference between a and b+d can be reasonably set according to the actual assembly requirements, so that a is slightly larger than b+d. In the stable snap-fit ​​state, the side plate 22 is in a slightly deformed state, that is, it is deformed inward towards the substrate 21, so that the first snap-fit ​​structure 31 and the second snap-fit ​​part 3222 always remain in contact and do not easily slide relative to each other, while not affecting the normal assembly of the battery top cover assembly 100 in the battery.

[0055] In a further embodiment of this utility model, such as Figure 4 , Figure 8 , Figure 12 , Figure 13 As shown, the first snap-fit ​​structure 31 has a receiving cavity 312 for accommodating the second snap-fit ​​structure 32. The receiving cavity 312 extends through the first snap-fit ​​structure 31 at both ends along a first direction to provide space for the sliding of the second snap-fit ​​structure 32 relative to the first snap-fit ​​structure 31. The end of the first snap-fit ​​structure 31 that can abut against the second snap-fit ​​structure 32 is provided with a latch 311, and the latch 311 communicates with the receiving cavity 312. That is, the end of the receiving cavity 312 near the second snap-fit ​​structure 32 has a latch 311 to allow the second snap-fit ​​structure 32 to enter and exit the receiving cavity 312.

[0056] In the pre-engaged state between the first engaging structure 31 and the first engaging part 3221, at least a portion of the first engaging part 3221 extends into the receiving cavity 312 through the latch 311 and forms a sliding fit with the receiving cavity 312, allowing for relative sliding in the first direction. In the firmly engaged state between the first engaging structure 31 and the second engaging part 3222, at least a portion of the second engaging part 3222 cannot extend into the receiving cavity 312 through the latch 311, thus forming a firmly engaged state. Furthermore, the second engaging part 3222 slides within the receiving cavity 312, enabling relative sliding in the first direction. Preferably, an abutment surface can be provided on the second engaging part 3222 to abut against the first engaging structure 31, preventing at least a portion of the second engaging part 3222 from extending out of the latch 311, thereby preventing disengagement.

[0057] Furthermore, such as Figure 8 and Figure 13 As shown, the first locking structure 31 specifically includes two connecting arms 313, which are arranged opposite each other in the second direction. Each connecting arm 313 is provided with a hook portion 314, which are also arranged opposite each other in the second direction. When the first locking structure 31 engages with the second locking portion 3222, the two hook portions 314 abut against the second locking portion 3222, thereby forming a secure locking state between the second locking portion 3222 and the first locking structure 31. The gap between the two oppositely arranged hook portions 314 forms a notch 311, and the two oppositely arranged connecting arms 313 form a receiving cavity 312. During assembly, the second locking portion 3222 extends from the notch 311 into the receiving cavity 312 and abuts against the two hook portions 314, thus forming a secure locking state.

[0058] In a further embodiment of this utility model, such as Figure 3 and Figures 6 to 8 As shown, in the second direction, the minimum spacing of the latches 311 is h1, the maximum width of the first latching portion 3221 is h2, the maximum width of the second latching portion 3222 is d1, and the minimum width of the receiving cavity 312 is h3; in the first direction, the length of the receiving cavity 312 is w1, and the length of the first latching portion 3221 is w2. These dimensions satisfy the following relationship: in the first direction, w1 ≤ w2; in the second direction, h2 ≤ d1. <d1≤h3,-0.1mm 0.4mm.

[0059] Through the above relationship w1 ≤ w2, that is, the length of the accommodating cavity 312 in the first direction is less than or equal to the length of the first engaging portion 3221 in the first direction, so that when the first engaging portion 3221 extends into the accommodating cavity 312 through the bayonet 311, the sizes of the two are adapted to each other to avoid mutual interference. Through the above relationship h2 < d1 ≤ h3, the accommodating cavity 312 can have sufficient space to accommodate the first engaging portion 3221 and the second engaging portion 3222. Through the above relationship -0.1 mm < h2 - h1 < 0.1 mm, the gap between the width of the first engaging portion 3221 and the width of the bayonet 311 is only within the range of 0.1 mm. The first engaging portion 3221 can normally pass through the bayonet 311 and enter the accommodating cavity 312. Even when h2 is less than h1, the gap is only within the range of 0.1 mm. By applying an external force to squeeze the two hook portions 314 and the connecting arm 313 to cause slight elastic deformation, the first engaging portion 3221 can enter the accommodating cavity 312 from the bayonet 311. And through the above relationship d1 - h1 > 0.4 mm, the width of the second engaging portion 3222 is greater than the width of the bayonet 311. After the second engaging portion 3222 enters the accommodating cavity 312, the second engaging portion 3222 cannot pass through the bayonet 311 and extend out of the accommodating cavity 312, so that the second engaging portion 3222 and the first engaging structure 31 form a stable engaging state, preventing the occurrence of a tripping phenomenon.

[0060] In a further embodiment of the present utility model, as Figures 5 to 11 and Figure 14 shown, the first engaging portion 3221 has a first plane 3223 and a second plane 3224 oppositely arranged in the second direction. The first plane 3223 is parallel to the second plane 3224, and the distance between the first plane 3223 and the second plane 3224 in the second direction is h2. When the first engaging portion 3221 is engaged with the first engaging structure 31, the first plane 3223 and the second plane 3224 are respectively opposite to both ends of the bayonet 311, so that the width of the first engaging portion 3221 in the second direction is always adapted to the width of the bayonet 311, facilitating the first engaging portion 3221 to smoothly pass through the bayonet 311 and enter the accommodating cavity 312.

[0061] Correspondingly, at least one end of the first engaging portion 3221 in the first direction is connected with a second engaging portion 3222. The second engaging portion 3222 has a first abutting surface 3227 perpendicular to the third direction, and the width of the first abutting surface 3227 in the second direction is d1. By providing the first abutting surface 3227, when the second engaging portion 3222 cooperates with the first engaging structure 31, the second engaging portion 3222 abuts against the first engaging structure 31 through the first abutting surface 3227, so that the second engaging portion 3222 and the first engaging structure 31 form a stable engaging state.

[0062] In a further embodiment of this utility model, such as Figure 5 and Figure 9 As shown, each second latching structure 32 includes two second latching portions 3222, and the two second latching portions 3222 are respectively connected to the two ends of the first latching portion 3221 in the first direction. When the first latching portion 3221 and the first latching structure 31 form a pre-latching state, the second latching structure 32 can be slid forward or backward along the first direction to switch to a stable latching state between the first latching structure 31 and the second latching portion 3222.

[0063] Furthermore, such as Figure 5 and Figure 9 As shown, the second snap-fit ​​structure 32 also includes a support 321 and a snap-fit ​​rod 322. The support 321 is fixedly connected to the side plate 22 or the base plate 21; the snap-fit ​​rod 322 extends along a first direction and is connected to the support 321, and the snap-fit ​​rod 322 has a first snap-fit ​​portion 3221 and a second snap-fit ​​portion 3222 provided along the first direction. By providing the support 321, the snap-fit ​​rod 322 can be more firmly fixed, and at the same time, it can also provide space for the snap-fit ​​rod 322 to engage with the first snap-fit ​​structure 31.

[0064] The following provides an example of a specific implementation of the battery top cover assembly 100 of this utility model.

[0065] like Figures 1 to 14 In the example shown, the battery top cover assembly 100 includes a top cover sheet 10 and an insulating member 20. The insulating member 20 includes a substrate 21, two side plates 22, and a plurality of snap-fit ​​components 3. The substrate 21 and the top cover sheet 10 are stacked together. The two side plates 22 are each disposed on the side of the substrate 21 away from the top cover sheet 10 and are spaced apart in a first direction. In a third direction, the substrate 21 has a first surface 213 facing the side plate 22, and the side plate 22 has a second surface 222 facing the substrate 21. A plurality of snap-fit ​​components 3 are provided between each side plate 22 and the substrate 21, that is, a snap-fit ​​component 3 is provided between the first surface 213 and the second surface 222, so that a snap-fit ​​engagement is formed between the side plate 22 and the substrate 21 through the snap-fit ​​components 3.

[0066] Each set of snap-fit ​​components 3 includes a first snap-fit ​​structure 31, a second snap-fit ​​structure 32, and a support block 315 that are mutually compatible. For example... Figure 8 and Figure 13As shown, both the first snap-fit ​​structure 31 and the support block 315 are connected to the first surface 213 of the substrate 21. Specifically, the first snap-fit ​​structure 31 includes two connecting arms 313, which are arranged opposite each other in a second direction. Each connecting arm 313 has a hook 314 at its end away from the first surface 213. The two hooks 314 are arranged opposite each other in the second direction and extend towards each other along the second direction. The gap between the two oppositely arranged hooks 314 forms a latch 311, and the two oppositely arranged connecting arms 313 form a receiving cavity 312, with the latch 311 communicating with the receiving cavity 312.

[0067] like Figure 5 and Figure 9 As shown, the second snap-fit ​​structure 32 is connected to the second surface 222 of the side plate 22. The second snap-fit ​​structure 32 specifically includes a support 321 and a snap-fit ​​rod 322. The support 321 is a frame-shaped structure and is fixedly connected to the second surface 222 of the side plate 22; the snap-fit ​​rod 322 extends along a first direction and is connected to the side of the support 321 away from the side plate 22, so that the internal space of the support 321 creates a gap at one end between the snap-fit ​​rod 322 and the second surface 222 of the side plate 22. A first opening structure 221, extending along a third direction, is provided on the side plate 22 at a position corresponding to the support 321. The design of the first opening structure 221 is to avoid the first snap-fit ​​structure 31.

[0068] The locking lever 322 has a first locking portion 3221 and a second locking portion 3222 provided along a first direction. For example... Figures 5 to 11 as well as Figure 14 As shown, there are two second latching portions 3222, and the two second latching portions 3222 are respectively connected to the two ends of the first latching portion 3221 in the first direction. The first latching portion 3221 has a first plane 3223 and a second plane 3224 that are arranged opposite to each other and parallel to each other in the second direction. The first plane 3223 and the second plane 3224 are both perpendicular to the second direction, and the distance between the first plane 3223 and the second plane 3224 in the second direction is h2. Correspondingly, each second latching portion 3222 has a first abutting surface 3227 formed on the side facing the support 321. The first abutting surface 3227 is perpendicular to the third direction, and the width of the first abutting surface 3227 in the second direction is d1, that is, the width of the second latching portion 3222 in the second direction is d1.

[0069] Specifically, such as Figures 5 to 11 as well as Figure 14In the example, the side of the latching rod 322 away from the side plate 22 has an arc structure with a radius of d1. The cross-section of the first latching part 3221 is racetrack-shaped, with a first plane 3223, a second plane 3224, and two inferior arc surfaces that connect the first plane 3223 and the second plane 3224 and are also opposite to each other. The second latching part 3222 includes two interconnected parts. The cross-section of the first part is semi-circular, with a first abutment surface 3227 and a semi-circular arc surface connected thereto. The second part is connected to the first abutment surface 3227 and to the first latching part 3221. The second part has a third plane 3225 that is flush with the first plane 3223 and a fourth plane 3226 that is flush with the second plane 3224. The inferior arc surface of the first latching part 3221 and the semi-circular arc surface of the second latching part 3222 form the arc structure of the latching rod 322, which can play a guiding role during the process of the latching rod 322 being latched into the receiving cavity 312.

[0070] like Figure 3 and Figures 6 to 8 As shown, in the first direction, the length of the accommodating cavity 312 is w1, and the length of the first latching portion 3221 is w2; in the second direction, the minimum spacing of the latches 311 (i.e., the distance between the two hooks 314) is h1, the width of the first latching portion 3221 (i.e., the distance between the first plane 3223 and the second plane 3224) is h2, the maximum width of the second latching portion 3222 (i.e., the distance between the two ends of the first abutting surface 3227) is d1, and the minimum width of the accommodating cavity 312 (i.e., the distance between the two connecting arms 313) is h3; in the third direction, the distance between the first abutting surface 3227 and the first surface 213 of the substrate 21 is d, the distance between the first abutting surface 3227 and the second surface 222 of the side plate 22 is b, and the height of the support block 315 in the third direction is a. The above dimensions satisfy the following relationship: in the first direction, w1 ≤ w2; and in the second direction, h2 <d1≤h3,-0.1mm 0.4mm; additionally, in the third direction, a>b+d.

[0071] During assembly, such as Figure 15 and Figure 16 As shown, by squeezing the side plate 22, the first engaging portion 3221 of the engaging rod 322 can pass through the slot 311 and enter the receiving cavity 312, forming a pre-engagement with the first engaging structure 31; due to the dimensional relationship between w1 and w2, the second engaging portion 3222 will not contact the hook portion 314 during the process of the first engaging portion 3221 entering the receiving cavity 312; and due to the dimensional relationship between d1, h1, and h2, the first engaging portion 3221 can smoothly pass through the slot 311 and enter the receiving cavity 312. Afterwards, as... Figure 17 and Figure 18As shown, by sliding the side plate 22 relative to the substrate 21 in the first direction, the locking rod 322 slides to the second locking part 3222, which enters the receiving cavity 312 and forms a locking engagement with the first locking structure 31. At this time, since the end of the support block 315 away from the substrate 21 abuts against the second surface 222 of the side plate 22, a thrust is generated between the substrate 21 and the side plate 22 in opposite directions in the third direction. This causes the first abutting surface 3227 of the second locking part 3222 to abut and press against the hook part 314 of the first locking structure 31. Due to the dimensional relationship between a, b, and d, the side plate 22 and / or the substrate 21 are in a state of slight elastic deformation, thereby ensuring that the second locking part 3222 and the first locking structure 31 are in a stable locking state. When disassembly is required, the above steps can be reversed, which will not be described in detail here.

[0072] More preferably, such as Figure 19 and Figure 20 In the example shown, in the first direction, an explosion-proof valve 410 is provided near the center of the top cover plate 10, and each side of the explosion-proof valve 410 has a pole hole. In contrast, as... Figure 2 and Figure 4 In the example shown, the substrate 21 has an explosion-proof hole and a hollow structure 211 at the position corresponding to the explosion-proof valve 410. The hollow structure 211 is arranged circumferentially around the explosion-proof hole to reserve expansion space for the injection molding process, thereby reducing stress. In the first direction, each side of the explosion-proof hole has a pole hole, two sets of first snap-fit ​​structures 31, and two sets of support blocks 315. Correspondingly, each side plate 22 has two sets of second snap-fit ​​structures 32, and a groove structure adapted to the explosion-proof hole is provided at the end of the side plate 22 near the explosion-proof hole.

[0073] When assembled into a battery, such as Figure 19 and Figure 20 As shown, the side plate 22 away from the substrate 21 is correspondingly positioned to the battery cell 405. The electrode posts 403 are inserted into the electrode post holes on both sides of the explosion-proof hole and protrude from the side of the top cover plate 10 away from the substrate 21. The side of the explosion-proof valve 410 away from the substrate 21 is also provided with an explosion-proof valve patch 409 for covering the explosion-proof valve 410. In addition, the electrode post holes of the top cover plate 10 are also provided with upper plastic 401 and sealing ring 402.

[0074] The battery top cover assembly 100 in this embodiment improves the structure and engagement method of the snap-fit ​​assembly 3 between the side plate 22 and the base plate 21. This allows the first snap-fit ​​structure 31 and the second snap-fit ​​structure 32 to switch from a pre-snap-fit ​​state to a stable snap-fit ​​state. In the stable snap-fit ​​state, the snap-fit ​​cannot be directly released. This facilitates snap-fit ​​engagement and prevents problems such as loose snap-fit, disengagement, or pop-out of the snap-fit ​​assembly during use. As a result, the product has higher reliability and is conducive to improving the safety and production efficiency of battery products.

[0075] A second aspect of the present invention also provides a battery, including the battery top cover assembly 100 of any of the embodiments of the first aspect described above.

[0076] Furthermore, such as Figure 19 and Figure 20 As shown, the battery also includes a cell 405, an adapter plate 404, a terminal post 403, an insulating film 406, a bottom support plate 407, and a housing 408. The tab side of the cell 405 is correspondingly arranged with the side plate 22 of the battery top cover assembly 100. After assembly, the tab of the cell 405 is bent and inserted between the base plate 21 of the insulating component 20 and the side plate 22; the terminal post 403 is inserted into the terminal post hole, and the tab is connected to the terminal post 403 through the adapter plate 404. The outer surface of the cell 405 is covered with an insulating film 406. The covered cell 405 is installed in the housing 408. The battery top cover assembly 100 is located at one end of the housing 408, and the bottom support plate 407 is located at the end of the cell 405 away from the battery top cover assembly 100.

[0077] The battery in this embodiment also has all the beneficial effects of the battery top cover assembly in any of the first aspects described above, which will not be repeated here.

[0078] In addition, one embodiment of this utility model also provides an electrical device including the battery described in any of the second aspects above, for supplying power to the electrical device via the battery. The electrical device has all the beneficial effects of the battery in any of the above embodiments, which will not be repeated here.

[0079] The basic principles of this utility model have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this utility model are merely examples and not limitations, and should not be considered as essential features of each embodiment of this utility model. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the utility model from being implemented using the aforementioned specific details.

[0080] The block diagrams of the devices, apparatuses, equipment, and systems involved in this utility model 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, equipment, 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. It should also be noted that in the devices and equipment of this utility model, the components can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered equivalent solutions of this utility model.

[0081] The above description has been given for illustrative and descriptive purposes. 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. The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. 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 the present invention. Therefore, the present invention is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features of the present invention.

[0082] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications or equivalent substitutions made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A battery top cover assembly, characterized in that, include: Top cover plate (10); An insulating component (20) includes a substrate (21) and a side plate (22), wherein the substrate (21) and the top cover plate (10) are stacked together, and the side plate (22) is disposed on the side of the substrate (21) away from the top cover plate (10); the side plate (22) and the substrate (21) are connected by a snap-fit ​​assembly (3); The snap-fit ​​assembly (3) includes a first snap-fit ​​structure (31) and a second snap-fit ​​structure (32). In the substrate (21) and the side plate (22), one is provided with the first snap-fit ​​structure (31) and the other is provided with the second snap-fit ​​structure (32). The second snap-fit ​​structure (32) has a first snap-fit ​​portion (3221) that is pre-snap-fitted with the first snap-fit ​​structure (31) and a second snap-fit ​​portion (3222) that is securely snap-fitted with the first snap-fit ​​structure (31); the substrate (21) and the side plate (22) can slide relative to each other so that the first snap-fit ​​structure (31) switches from being pre-snap-fitted with the first snap-fit ​​portion (3221) to being securely snap-fitted with the second snap-fit ​​portion (3222).

2. The battery top cover assembly according to claim 1, characterized in that, The snap-fit ​​assembly (3) also includes at least one support block (315); In the base plate (21) and the side plate (22), one is fixedly connected to one end of the support block (315), and the other abuts against the other end of the support block (315).

3. The battery top cover assembly according to claim 2, characterized in that, In the state where the first snap-fit ​​structure (31) and the second snap-fit ​​part (3222) are securely snapped together, the second snap-fit ​​part (3222) has a first abutting surface (3227) that can abut against the first snap-fit ​​structure (31); the substrate (21) has a first surface (213) facing the side plate (22), and the side plate (22) has a second surface (222) facing the substrate (21); in the third direction, the distance between the first abutting surface (3227) and the first surface (213) of the substrate (21) is d, the distance between the first abutting surface (3227) and the second surface (222) of the side plate (22) is b, the height of the support block (315) is a, and the third direction is the thickness direction of the substrate (21), wherein a > b + d.

4. The battery top cover assembly according to any one of claims 1 to 3, characterized in that, The first snap-fit ​​structure (31) has a receiving cavity (312), and both ends of the receiving cavity (312) along the first direction pass through the first snap-fit ​​structure (31), the first direction being the length direction of the substrate (21); the first snap-fit ​​structure (31) is provided with a slot (311) at one end that can abut against the second snap-fit ​​structure (31), the slot (311) communicating with the receiving cavity (312), and both ends of the slot (311) along the first direction passing through the first snap-fit ​​structure (31); In the pre-engaged state between the first engaging structure (31) and the first engaging part (3221), at least a portion of the first engaging part (3221) extends into the receiving cavity (312) through the slot (311) and is slidably engaged with the receiving cavity (312); in the stable engaged state between the first engaging structure (31) and the second engaging part (3222), at least a portion of the second engaging part (3222) cannot extend out of the receiving cavity (312) through the slot (311) and is slidably engaged with the receiving cavity (312).

5. The battery top cover assembly according to claim 4, characterized in that, The first snap-fit ​​structure (31) includes two connecting arms (313) arranged opposite to each other along a second direction. Each of the two connecting arms (313) is provided with a hook (314). The hook (314) is configured to abut against the second snap-fit ​​part (3222) when the first snap-fit ​​structure (31) and the second snap-fit ​​part (3222) are securely snapped together. The two hooks (314) are arranged opposite to each other along the second direction, and a bayonet (311) is formed between the two hooks (314). The receiving cavity (312) is formed between the two connecting arms (313). The second direction is the width direction of the substrate (21).

6. The battery top cover assembly according to claim 4, characterized in that, The minimum spacing of the bayonet (311) in the second direction is h1, and the length of the accommodating cavity (312) in the first direction is w1; The first latching part (3221) has a maximum width of h2 in the second direction and a length of w2 in the first direction. The maximum width of the second latching part (3222) in the second direction is d1; The minimum width of the accommodating cavity (312) in the second direction is h3; Where w1≤w2, h2 <d1≤h3,-0.1mm 0.4mm.

7. The battery top cover assembly according to claim 4, characterized in that, The second snap-fit ​​structure (32) further includes a support (321) and a snap-fit ​​rod (322), the snap-fit ​​rod (322) extends along a first direction and is connected to the support (321), the snap-fit ​​rod (322) has a first snap-fit ​​portion (3221) and a second snap-fit ​​portion (3222) arranged along the first direction.

8. The battery top cover assembly according to claim 7, characterized in that, The first snap-fit ​​portion (3221) has a first plane (3223) and a second plane (3224) that are opposite to and parallel to each other in a second direction, and the distance between the first plane (3223) and the second plane (3224) is h2; The first latching portion (3221) is connected to the second latching portion (3222) at least one end along the first direction. The second latching portion (3222) has a first abutting surface (3227), which is perpendicular to the third direction. The width of the first abutting surface (3227) in the second direction is d1.

9. The battery top cover assembly according to any one of claims 1 to 3, characterized in that, There are two second latching parts (3222), and the two second latching parts (3222) are respectively connected to the two ends of the first latching part (3221) in the first direction.

10. A battery, characterized in that, include: The battery top cover assembly as claimed in any one of claims 1 to 9.

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