Battery top cover assembly and battery

Abstract

The utility model relates to battery technical field provides a kind of battery top cover assembly and battery, battery top cover assembly includes: top cover body, is equipped with liquid injection hole;Insulator, first side is fixed in top cover body, insulator and the position of liquid injection hole correspond to form liquid guide channel, one end of liquid guide channel is communicated with liquid injection hole, the other end of liquid guide channel extends to the outer wall surface of insulator second side;Liquid guide channel outside forms the step portion extending in the direction away from top cover body, step portion includes the first protrusion on the outer wall surface of insulator second side, and the second protrusion extending from the first protrusion to the direction away from top cover body, support surface is formed on the second protrusion.The battery top cover assembly avoids the situation that battery tab blocks liquid guide channel, can ensure that electrolyte is smoothly injected into battery inside, while in negative pressure air extraction procedure, the vacuum effect in battery inside will not be influenced due to battery tab shielding, to improve the liquid injection efficiency of battery.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery top cover assembly and a battery. Background Technology

[0002] During battery manufacturing, electrolyte needs to be injected into the casing through the injection port on the top cover. To achieve this, the lower plastic casing usually has through-holes corresponding to the injection port on the top cover. However, in some rechargeable battery designs, due to structural limitations and the compactness of the top cover space, the injection port can often only be located above the cell tabs. Meanwhile, to improve the battery's energy density, the internal space of the battery is arranged as compactly as possible. While this design optimizes space utilization, it also introduces new problems: the cell tabs may block the through-holes on the lower plastic casing corresponding to the injection port. In the subsequent negative pressure evacuation process, this blockage will prevent the battery from being properly evacuated, thus affecting the battery's manufacturing quality. Furthermore, some burrs on the tabs may extend into the through-holes and become electrically connected to the top cover, significantly increasing the risk of internal short circuits. Utility Model Content

[0003] This utility model provides a battery top cover assembly and a battery to avoid the problem that the battery cell tabs may block the through hole of the lower plastic corresponding to the liquid injection hole, and that some burrs of the tabs may extend into the through hole and electrically connect with the top cover, increasing the risk of short circuit in the battery.

[0004] In a first aspect, this utility model provides a battery top cover assembly, comprising: The top cover body is equipped with a liquid injection hole; An insulating component is fixed to the top cover body on the first side. A liquid guiding channel is formed on the insulating component at the position corresponding to the liquid injection hole. One end of the liquid guiding channel is connected to the liquid injection hole, and the other end of the liquid guiding channel extends to the outer wall surface of the second side of the insulating component. The outer side of the liquid guiding channel is formed with a stepped portion extending away from the top cover body. The stepped portion includes a first protrusion located on the outer wall surface of the second side of the insulating member, and a second protrusion extending away from the top cover body from the first protrusion. A support surface is formed on the second protrusion.

[0005] According to the present invention, a battery top cover assembly is provided, wherein the insulating member forms a bulge at the position corresponding to the liquid injection hole, the liquid guiding channel is located inside the bulge, and a stepped portion is formed on the outer side of the bulge extending away from the top cover body.

[0006] According to the present invention, a battery top cover assembly includes a liquid guiding channel comprising: The first channel extends at one end to communicate with the injection hole, and at the other end extends to the wall of the bottom surface of the convex bulge and forms a first opening; The second channel extends at one end to communicate with the injection hole, and at the other end extends to the wall of the side of the convex bulge to form a second opening.

[0007] According to the present invention, a battery top cover assembly is provided, wherein the stepped portion is provided in a plurality of manners, and the plurality of stepped portions are arranged in a ring at intervals along the edge of the first opening.

[0008] According to the present invention, a battery top cover assembly further includes: A baffle is formed on the second side of the insulating member, and a gap is provided between the baffle and the second opening, located outside the second opening.

[0009] According to the present invention, a battery top cover assembly is provided, wherein the baffle extends toward or away from the second opening.

[0010] According to the present invention, a battery top cover assembly is provided, wherein an explosion-proof hole is formed on the top cover body, and a vent hole corresponding to the position of the explosion-proof hole is formed on the insulating member, and the battery top cover assembly further includes an explosion-proof sheet disposed in the explosion-proof hole.

[0011] According to the present invention, a battery top cover assembly further includes: an explosion-proof film; The explosion-proof membrane is disposed at one end outside the explosion-proof hole, and the explosion-proof sheet is disposed at one end inside the explosion-proof hole, forming an explosion-proof cavity between the explosion-proof sheet and the explosion-proof membrane.

[0012] According to the present invention, a battery top cover assembly is provided, wherein the insulating component includes: a first insulating component and a second insulating component; the first insulating component and the second insulating component are spliced ​​together and fixed to the top cover body; The battery top cover assembly further includes: a first terminal and a second terminal; the first terminal passes through the top cover body and the first insulating member, and the second terminal passes through the top cover body and the second insulating member; The first insulating member and / or the second insulating member have the liquid guiding channel formed therein, and the stepped portion is provided accordingly.

[0013] Secondly, this utility model also provides a battery, comprising: Battery casing; The aforementioned battery top cover assembly is fixed to the opening of the battery casing; A battery electrode assembly is located inside the battery housing and has battery tabs extending to the insulating member. The stepped portion is supported between the liquid guiding channel of the insulating member and the battery tabs, and the supporting surface abuts against the battery electrode assembly.

[0014] The battery top cover assembly and battery provided by this utility model, by setting a flow guiding channel and a stepped portion on the insulating component, and utilizing the stepped portion including a first protrusion and a second protrusion, allows the supporting surface on the second protrusion to support and engage, spatially isolating the liquid guiding channel from the battery tabs, thus avoiding the battery tabs blocking the liquid guiding channel. Even if the injection hole is positioned on the upper side of the battery tabs, it can ensure that the electrolyte is smoothly injected into the battery. At the same time, during the negative pressure evacuation process, the evacuation effect inside the battery will not be affected by the battery tabs blocking it, thereby improving the liquid injection efficiency and evacuation reliability of the battery. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the front of the battery top cover assembly provided by this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the back of the battery top cover assembly provided by this utility model.

[0018] Figure 3 This is a disassembly diagram of the battery top cover assembly provided by this utility model.

[0019] Figure 4 This is an enlarged schematic diagram of the stepped portion of the battery top cover assembly provided by this utility model.

[0020] Figure 5 This is a front view of the battery top cover assembly provided by this utility model.

[0021] Figure 6 yes Figure 5 A partial structural diagram of section AA in the middle.

[0022] Figure 7 This is a three-dimensional structural diagram of the battery provided by this utility model.

[0023] Figure label: 1. Battery top cover assembly; 11. Top cover body; 111. Liquid injection hole; 12. Insulating component; 121. First channel; 122. Second channel; 123. First insulating component; 124. Second insulating component; 125. Top plastic; 126. Sealing ring; 13. Stepped section; 131. First protrusion; 132. Second protrusion; 14. Baffle; 15. Protrusion; 16. Explosion-proof sheet; 17. Explosion-proof membrane; 18. First pole; 19. Second pole; 2. Battery casing. Detailed Implementation

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0026] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0028] The following is combined with Figures 1-7 This invention describes the battery top cover assembly 1 and the battery provided by this utility model.

[0029] This application provides a battery top cover assembly 1. For example... Figures 1 to 4 As shown, the battery top cover assembly 1 includes a top cover body 11 and an insulating member 12. The first side of the insulating member 12 is fixed to the top cover body 11. A liquid guiding channel is formed on the insulating member 12 at a position corresponding to the liquid injection hole 111 (generally located inside the insulating member 12 or on the surface of the second side). One end of the liquid guiding channel communicates with the liquid injection hole 111, and the other end of the liquid guiding channel extends to the outer wall surface of the second side (opposite to the first side) of the insulating member 12. A stepped portion 13 is formed on the outer side of the liquid guiding channel, extending away from the top cover body 11. The stepped portion 13 includes a first protrusion 131 located on the outer wall surface of the second side of the insulating member 12, and a second protrusion 132 extending from the first protrusion 131 away from the top cover body 11. A support surface is formed on the second protrusion 132.

[0030] In this embodiment, the top cover body 11 is the main supporting structure of the battery top cover, serving to seal and protect the battery interior. The insulating member 12 is fixed to the top cover body 11, and its main function is to achieve electrical insulation and prevent current leakage inside the battery. One end of the liquid guiding channel on the insulating member 12 is connected to the liquid injection hole 111, and the other end extends to the outer wall surface of the second side of the insulating member 12, allowing the electrolyte to smoothly enter the battery interior through the liquid guiding channel. A stepped portion 13 is formed on the outer side of the liquid guiding channel, extending away from the top cover body 11. The stepped portion 13 consists of two parts: a first protrusion 131 and a second protrusion 132. The first protrusion 131 is located on the outer wall surface of the second side of the insulating member 12, providing initial support and positioning; the second protrusion 132 extends from the first protrusion 131 away from the top cover body 11, and a supporting surface is formed on the second protrusion 132. The supporting surface directly cooperates to support the battery tabs, thereby spatially isolating the liquid guiding channel from the battery tabs.

[0031] During the electrolyte injection process, because the electrolyte channel and the battery tabs are spatially isolated, the electrolyte can flow smoothly into the battery through the electrolyte channel without being interfered with by the battery tabs, which greatly improves the electrolyte injection efficiency.

[0032] During the negative pressure vacuuming process, the battery tabs do not block the liquid conduction channels, allowing air inside the battery to be discharged smoothly. This ensures the vacuuming effect inside the battery, prevents residual air inside the battery, reduces oxidation reactions inside the battery, and extends the battery's lifespan.

[0033] The battery top cover assembly 1 provided by this utility model provides a flow channel and a stepped portion 13 on the insulating member 12. The stepped portion 13, including a first protrusion 131 and a second protrusion 132, allows the supporting surface on the second protrusion 132 to provide support and fit, spatially isolating the liquid channel from the battery tabs and preventing the battery tabs from blocking the liquid channel. Even if the injection hole 111 is positioned above the battery tabs, it ensures smooth electrolyte injection into the battery. Furthermore, during the negative pressure evacuation process, the battery tabs do not obstruct the vacuuming effect inside the battery, thus improving the battery's injection efficiency and evacuation reliability. Moreover, the stepped portion 13 allows the liquid channel to be separated from the battery tabs, preventing short circuits between the battery tabs and the top cover body 11 caused by burrs.

[0034] Under normal circumstances, such as Figures 1 to 4 As shown, a protrusion 15 is formed at the position corresponding to the injection hole 111 of the insulating component 12. The protrusion 15 is integrally formed with the insulating component 12. Its main function is to provide a dedicated space for the liquid guiding channel, so that the liquid guiding channel can be better integrated inside the insulating component 12. At the same time, it can also play a certain protective role, preventing the liquid guiding channel from being damaged by external mechanical forces during the liquid injection process.

[0035] The electrolyte channel is located inside the protrusion 15, forming a relatively independent space between the electrolyte channel and the other parts of the insulating component 12, which facilitates the smooth flow of electrolyte. One end of the electrolyte channel is connected to the injection hole 111. After the electrolyte enters the electrolyte channel through the injection hole 111, it can flow smoothly into the battery along the electrolyte channel. A stepped portion 13 extending away from the top cover body 11 is formed on the outer side of the protrusion 15. The first protrusion 131 is located on the outer wall surface of the protrusion 15, playing a preliminary supporting and positioning role; the second protrusion 132 extends from the first protrusion 131 away from the top cover body 11, and a supporting surface is formed on the second protrusion 132.

[0036] When the battery tab comes into contact with the insulating part 12, the protrusion 15 and the supporting surface of the step part 13 can effectively support the battery tab, thereby spatially isolating the liquid channel from the battery tab. This can effectively prevent the battery tab from blocking the liquid channel during the liquid injection process and ensure that the electrolyte can be smoothly injected into the battery.

[0037] Meanwhile, since the convex bulge 15 and the stepped portion 13 isolate the battery tab from the liquid channel, the battery tab will not block the liquid channel, thus ensuring that the air inside the battery can be smoothly discharged and improving the vacuuming effect inside the battery.

[0038] In some embodiments, such as Figures 1 to 4 As shown, the electrolyte channel includes a first channel 121 and a second channel 122. One end of the first channel 121 extends to communicate with the injection hole 111, and the other end extends to the wall of the bottom surface of the convex 15, forming a first opening. This allows the electrolyte to enter the first channel 121 through the injection hole 111 and flow into the battery through the first opening. One end of the second channel 122 extends to communicate with the injection hole 111, and the other end extends to the wall of the side surface of the convex 15, forming a second opening. This provides another flow path for the electrolyte, further increasing the number of channels for the electrolyte to enter the battery. The existence of the second channel 122 not only increases the flow path of the electrolyte but also provides a backup path in certain situations. For example, when the first channel 121 cannot function properly for some reason (such as blockage by electrolyte impurities), the second channel 122 can continue to ensure the flow of electrolyte, thereby improving the reliability of battery electrolyte filling.

[0039] Because the convex bulge 15 has a stepped portion 13, the stepped portion 13 supports the battery tab and can prevent the first opening from being blocked. Due to the supporting effect of the stepped portion 13, the battery tab is positioned on the supporting surface of the stepped portion 13, away from the first opening. Even if the liquid injection hole 111 is positioned on the upper side of the battery tab, the battery tab will not come into contact with the first opening, thereby avoiding the situation where the first opening is blocked.

[0040] It should be noted that, depending on the formation of the first opening, multiple steps 13 can be provided, which can provide more support points and thus more effectively isolate the battery tabs from the liquid channel.

[0041] For example, when the first opening is circular, multiple stepped portions 13 are arranged in a ring at intervals along the edge of the first opening, so that the stepped portions 13 are evenly distributed around the first opening to form a complete support ring. This design not only increases the stability of the support, but also ensures that the battery tabs will not come into contact with the first opening in any direction, thereby further avoiding the risk of blockage.

[0042] Furthermore, the design of multiple steps 13 increases the redundancy of the structure. Even if one step 13 loses its function for some reason (such as mechanical damage or deformation), the other steps 13 can still continue to provide support, thereby ensuring the reliability of the entire battery top cover assembly 1.

[0043] In some embodiments, such as Figures 1 to 4 As shown, the battery top cover assembly 1 also includes a baffle 14. The baffle 14 is formed on the second side of the insulating member 12, and a gap is provided between the baffle 14 and the second opening, located outside the second opening. The baffle 14 can block the electrolyte flowing out from the second channel 122 (side hole), preventing the electrolyte from impacting the battery tabs, etc. It ensures that the electrolyte can flow out from the second channel 122, but the baffle 14 can play a certain role in blocking and buffering the flowing electrolyte.

[0044] The shape and size of the baffle 14 can be optimized according to the size of the second opening and the flow characteristics of the electrolyte to achieve the best buffering effect. For example, the baffle 14 can be a planar structure or a curved surface structure with a certain curvature. The curved surface structure of the baffle 14 can better guide the flow direction of the electrolyte and reduce electrolyte splashing and impact.

[0045] In addition, the baffle 14 not only blocks the electrolyte but also guides its flow direction. By properly setting the shape and position of the baffle 14, the electrolyte can be distributed more evenly inside the battery, further optimizing the electrolyte injection process.

[0046] For example, such as Figure 4 As shown, in this embodiment, the baffle 14 extends towards or away from the second opening. If the baffle 14 extends towards the second opening, it can more directly block and buffer the impact force of the electrolyte, but it is necessary to ensure that there is a sufficient gap between the baffle 14 and the second opening so that the electrolyte can flow out smoothly. If the baffle 14 extends away from the second opening, it can more effectively guide the flow direction of the electrolyte, making it more evenly distributed inside the battery.

[0047] In some embodiments, such as Figures 1 to 6 As shown, an explosion-proof hole is formed on the top cover body 11, and a vent hole corresponding to the position of the explosion-proof hole is formed on the insulating member 12. The battery top cover assembly 1 also includes an explosion-proof sheet 16 disposed in the explosion-proof hole.

[0048] In this embodiment, the rupture hole provides a pressure relief channel when the internal pressure of the battery is too high. A vent is provided on the insulating component 12, corresponding to the location of the rupture hole. The vent allows gas to escape when the rupture disc 16 ruptures, while preventing gas leakage under normal conditions. The rupture disc 16 is a thin sheet structure, typically made of a metal material such as aluminum, and is installed inside the rupture hole. When the internal pressure of the battery exceeds a certain value, the rupture disc 16 ruptures, releasing the internal pressure and preventing the battery from exploding. The rupture pressure of the rupture disc 16 needs to be precisely controlled to ensure reliable rupture and pressure relief when the pressure reaches a critical value.

[0049] In this embodiment, through the cooperation of explosion-proof holes, vent holes and explosion-proof sheet 16, the battery top cover assembly 1 can provide additional safety protection while ensuring normal function, and is suitable for battery application scenarios that require high safety and reliability.

[0050] Furthermore, such as Figure 5 and Figure 6 As shown, the battery top cover assembly 1 also includes: an explosion-proof membrane 17; the explosion-proof membrane 17 is disposed at one end outside the explosion-proof hole, the explosion-proof sheet 16 is disposed at one end inside the explosion-proof hole, and an explosion-proof cavity is formed between the explosion-proof sheet 16 and the explosion-proof membrane 17.

[0051] In this embodiment, the explosion-proof membrane 17 prevents foreign objects from puncturing the explosion-proof sheet 16. Simultaneously, the explosion-proof membrane 17 also prevents foreign objects, dust, and other contaminants from entering the explosion-proof vent, thus enhancing the explosion-proof capability. When the explosion-proof sheet 16 bursts, the presence of the explosion-proof cavity acts as a buffer, improving the battery's safety. The cooperation between the explosion-proof membrane 17 and the explosion-proof sheet 16 allows for rapid pressure relief when the internal pressure of the battery is excessively high, reducing the risk of explosion and improving battery safety.

[0052] Based on the above embodiments, in some embodiments, such as Figures 1 to 6 As shown, the insulating component 12 includes: a first insulating component 123 and a second insulating component 124; the first insulating component 123 and the second insulating component 124 are spliced ​​together and fixed to the top cover body 11, and the first insulating component 123 and the second insulating component 124 form a complete insulating component 12 structure, which can be connected by mechanical means (such as buckles, screws, etc.) or by adhesive.

[0053] The battery top cover assembly 1 also includes a first terminal 18 and a second terminal 19. The ends of the first terminal 18 and the second terminal 19 are fixed by corresponding upper plastic components, which provide additional insulation protection. The first terminal 18 is inserted through and fixed to the top cover body 11 and the first insulating member 123 via a sealing ring 126. The function of the sealing ring 126 is to prevent electrolyte leakage and ensure electrical insulation between the terminal and the top cover body 11. The second terminal 19 is also inserted through and fixed to the top cover body 11 and the first insulating member 123 via the sealing ring 126. Similar to the first terminal 18, this ensures that the second terminal 19 is securely fixed and reliably sealed.

[0054] Liquid guiding channels are formed in the first insulating member 123 and / or the second insulating member 124, and corresponding step portions 13 are provided. The step portions 13 support the battery tabs and prevent the battery tabs from directly contacting the liquid guiding channels, thereby preventing the liquid guiding channels from being blocked. Depending on the specific arrangement, multiple step portions 13 can be designed and distributed along the opening position of the liquid guiding channels.

[0055] This application also provides a battery, such as... Figures 1 to 7 As shown, the battery includes: a battery casing 2, a battery top cover assembly 1, and a battery electrode assembly. The battery top cover assembly 1 is fixed to the opening of the battery casing 2; the battery top cover assembly 1 includes a top cover body 11 and an insulating member 12. The first side of the insulating member 12 is fixed to the top cover body 11, and a liquid guiding channel is formed at the position of the insulating member 12 corresponding to the liquid injection hole 111. One end of the liquid guiding channel extends to communicate with the liquid injection hole 111, and the other end of the liquid guiding channel extends to the outer wall surface of the second side (opposite to the first side) of the insulating member 12; a stepped portion 13 is formed on the outer side of the liquid guiding channel, extending away from the top cover body 11. The stepped portion 13 includes a first protrusion 131 located on the outer wall surface of the second side of the insulating member 12, and a second protrusion 132 extending from the first protrusion 131 away from the top cover body 11. A support surface is formed on the second protrusion 132. The battery electrode assembly is located inside the battery housing 2 and has battery tabs extending to the insulating member 12. The stepped portion 13 is supported between the liquid guiding channel of the insulating member 12 and the battery tabs, and the supporting surface abuts against the battery electrode assembly.

[0056] During the electrolyte injection process, because the electrolyte channel and the battery tabs are spatially isolated, the electrolyte can flow smoothly into the battery through the electrolyte channel without being interfered with by the battery tabs, which greatly improves the electrolyte injection efficiency.

[0057] During the negative pressure vacuuming process, the battery tabs do not block the liquid conduction channels, allowing air inside the battery to be discharged smoothly. This ensures the vacuuming effect inside the battery, prevents residual air inside the battery, reduces oxidation reactions inside the battery, and extends the battery's lifespan.

[0058] The battery provided by this utility model, by providing a flow channel and a stepped portion 13 on the insulating member 12, utilizes the stepped portion 13, including a first protrusion 131 and a second protrusion 132, to allow the supporting surface on the second protrusion 132 to provide support and fit, spatially isolating the liquid channel from the battery tab, thus avoiding the battery tab blocking the liquid channel. Even if the injection hole 111 is positioned on the upper side of the battery tab, it can ensure that the electrolyte is smoothly injected into the battery. At the same time, during the negative pressure evacuation process, the evacuation effect inside the battery will not be affected by the battery tab blocking it, thereby improving the liquid injection efficiency and evacuation reliability of the battery. Moreover, with the support of the stepped portion 13, the liquid channel can be separated from the battery tab, which can prevent short circuits between the battery tab and the top cover body 11 caused by burrs.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery top cover assembly, characterized in that, include: The top cover body is equipped with a liquid injection hole; An insulating component is fixed to the top cover body on the first side. A liquid guiding channel is formed on the insulating component at the position corresponding to the liquid injection hole. One end of the liquid guiding channel is connected to the liquid injection hole, and the other end of the liquid guiding channel extends to the outer wall surface of the second side of the insulating component. The outer side of the liquid guiding channel is formed with a stepped portion extending away from the top cover body. The stepped portion includes a first protrusion located on the outer wall surface of the second side of the insulating member, and a second protrusion extending away from the top cover body from the first protrusion. A support surface is formed on the second protrusion.

2. The battery top cover assembly according to claim 1, characterized in that, The insulating component forms a bulge at the position corresponding to the injection hole, the liquid guiding channel is located inside the bulge, and a stepped portion is formed on the outer side of the bulge, extending away from the top cover body.

3. The battery top cover assembly according to claim 2, characterized in that, The liquid guiding channel includes: The first channel extends at one end to communicate with the injection hole, and at the other end extends to the wall of the bottom surface of the convex bulge and forms a first opening; The second channel extends at one end to communicate with the injection hole, and at the other end extends to the wall of the side of the convex bulge to form a second opening.

4. The battery top cover assembly according to claim 3, characterized in that, The stepped portion is provided in multiple ways, and the multiple stepped portions are arranged in a ring at intervals along the edge of the first opening.

5. The battery top cover assembly according to claim 3, characterized in that, The battery top cover assembly also includes: A baffle is formed on the second side of the insulating member, and a gap is provided between the baffle and the second opening, located outside the second opening.

6. The battery top cover assembly according to claim 5, characterized in that, The baffle extends toward or away from the second opening.

7. The battery top cover assembly according to claim 1, characterized in that, The top cover body has an explosion-proof hole that penetrates the top cover body, and the insulating component has a vent hole corresponding to the position of the explosion-proof hole. The battery top cover assembly also includes an explosion-proof sheet disposed in the explosion-proof hole.

8. The battery top cover assembly according to claim 7, characterized in that, The battery top cover assembly also includes: an explosion-proof film; The explosion-proof membrane is disposed at one end outside the explosion-proof hole, and the explosion-proof sheet is disposed at one end inside the explosion-proof hole, forming an explosion-proof cavity between the explosion-proof sheet and the explosion-proof membrane.

9. The battery top cover assembly according to any one of claims 1-8, characterized in that, The insulating component includes: a first insulating component and a second insulating component; the first insulating component and the second insulating component are spliced ​​together and fixed to the top cover body; The battery top cover assembly further includes: a first terminal and a second terminal; the first terminal passes through the top cover body and the first insulating member, and the second terminal passes through the top cover body and the second insulating member; The first insulating member and / or the second insulating member have the liquid guiding channel formed therein, and the stepped portion is provided accordingly.

10. A battery, characterized in that, include: Battery casing; The battery top cover assembly as described in any one of claims 1-9 is fixed to the opening of the battery housing; A battery electrode assembly is located inside the battery housing and has battery tabs extending to the insulating member. The stepped portion is supported between the liquid guiding channel of the insulating member and the battery tabs, and the supporting surface abuts against the battery electrode assembly.

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