Insulation, top cover assembly, battery and electrical device

Abstract

This application provides an insulating component, a top cover assembly, a battery, and an electrical device, relating to the field of battery technology. The top cover assembly includes a cover plate, terminals, and a first insulating component. The cover plate is used to cover the battery casing and has mounting holes. The terminals pass through the mounting holes. The first insulating component is disposed on the side of the cover plate facing the battery's core pack, and a barrier groove is provided on the side of the first insulating component facing the cover plate, surrounding the mounting holes. In this application, the vapor formed by the electrolyte and the electrolyte formed by the condensation of the vapor are blocked within the barrier groove, thereby improving the ability of the vapor formed by the electrolyte and the electrolyte formed by the condensation of the vapor to continue to seep into the depth of the assembly gap of the top cover assembly (such as into the mounting holes) along the gap between the cover plate and the first insulating component, thus improving the reliability and stability of the top cover assembly and the entire battery.

Description

Technical Field

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

[0002] The battery mainly consists of a casing, a top cover assembly, a core pack, and an electrolyte. The top cover assembly is connected to the casing, the core pack is located inside the casing and connected to the top cover assembly, and the electrolyte is contained inside the casing.

[0003] In related technologies, during the storage, formation, and subsequent use of batteries, the electrolyte is prone to generating vapor. This vapor can easily seep into the deep gaps in the assembly of the top cover assembly, thereby causing damage to the battery. Summary of the Invention

[0004] Embodiments of this application provide a top cover assembly, a battery, and an electrical device to improve at least some of the above-mentioned technical problems.

[0005] In a first aspect, embodiments of this application provide an insulating component for a top cover assembly. The top cover assembly further includes a cover plate for covering the battery casing. The cover plate has mounting holes for mounting terminals. An insulating component is provided on the side of the cover plate facing the battery core pack. The side of the insulating component facing the cover plate has a barrier groove, which is used to surround the mounting hole. Based on this, the vapor formed by the electrolyte and the electrolyte formed by the condensation of the vapor are blocked in the barrier tank, thereby improving the ability of the vapor formed by the electrolyte and the electrolyte formed by the condensation of the vapor to continue to penetrate into the deep assembly gap of the top cover assembly (such as the mounting hole) along the gap between the cover plate and the insulating component, which can improve the reliability and stability of the top cover assembly and the entire battery.

[0006] In some embodiments, the insulating element is further provided with a return hole that extends through the wall of the barrier groove; Therefore, the electrolyte stored in the barrier tank can flow back into the battery casing through the reflux hole. This prevents the electrolyte stored in the barrier tank for a long time from corroding and damaging the cover plate and / or insulation components, and also increases the total amount of electrolyte inside the casing to improve the battery's charging and discharging efficiency.

[0007] In some embodiments, there are multiple reflux holes, and at least some of the reflux holes are spaced apart circumferentially around the mounting hole; Based on this, multiple reflux holes allow the electrolyte in the barrier tank to flow back into the housing more easily.

[0008] In some implementations, the reflux hole extends to the bottom wall of the barrier groove; Based on this, it is possible to avoid the accumulation of liquid at the bottom of the barrier tank that cannot flow back into the shell.

[0009] In some implementations, the width of the barrier groove tends to decrease along the direction from the opening of the groove to the bottom of the groove. Based on this, the electrolyte in the barrier tank can be easily collected to the bottom of the barrier tank, and the insulating parts can be easily demolded during the manufacturing process.

[0010] In some embodiments, the barrier groove has a first side, a second side, and a bottom surface. The first side is arranged around the mounting hole, the second side is arranged around the outer periphery of the second side, and the bottom surface is connected between the first side and the second side, so that a barrier groove is formed between the first side, the second side, and the bottom surface, and the opening of the barrier groove is formed between the end of the first side away from the bottom surface and the end of the second side away from the bottom surface. Wherein, at least one of the first side and the second side is inclined relative to the bottom surface; Based on this, by setting it at an angle, the width of the barrier groove tends to decrease along the direction from the opening of the barrier groove to the bottom of the groove.

[0011] In some embodiments, the included angle between the first side surface and the bottom surface is A1, where A1 is greater than 90° and less than or equal to 135°; Based on this, the electrolyte in the barrier tank can be smoothly collected at the bottom, so that it can flow back into the shell through the return hole at the bottom.

[0012] In some embodiments, the included angle between the second side surface and the bottom surface is A2, where A2 is greater than 90° and less than or equal to 135°; Based on this, the electrolyte in the barrier tank can be smoothly collected at the bottom, so that it can flow back into the shell through the return hole at the bottom.

[0013] In some embodiments, the width of the barrier groove is W1, which is greater than or equal to 0.55 mm and less than or equal to 1.1 mm.

[0014] Based on this, by using W1 greater than or equal to 0.55 mm, the barrier groove can be avoided from being too small to store enough electrolyte, and by using W1 less than or equal to 1.1 mm, the barrier groove can be avoided from being too large to reduce the strength of the insulation.

[0015] In some embodiments, the bottom width of the barrier groove is W2, which is greater than or equal to 0.3 mm and less than or equal to 0.5 mm.

[0016] Based on this, by using W2 greater than or equal to 0.3 mm, the barrier groove can be prevented from being too small to store enough electrolyte, and by using W2 less than or equal to 0.5 mm, the barrier groove can be prevented from being too large to reduce the strength of the insulation.

[0017] In some implementations, the depth of the barrier groove is D, which is greater than or equal to 0.35 mm and less than or equal to 0.65 mm.

[0018] Based on this, by using D greater than or equal to 0.35 mm, the barrier groove can be prevented from being too small to store enough electrolyte, while by using D less than or equal to 0.65 mm, the barrier groove can be prevented from being too large to reduce the strength of the insulation.

[0019] In some embodiments, the sidewall of the barrier groove is provided with a barrier portion; Based on this, the electrolyte at the bottom of the barrier tank can be prevented from rising upwards and thus seeping deep into the assembly gap of the top cover assembly.

[0020] In some embodiments, the barrier groove has a first side, a second side, and a bottom surface. The first side is arranged around the mounting hole, the second side is arranged around the outer periphery of the second side, and the bottom surface is connected between the first side and the second side, so that a barrier groove is formed between the first side, the second side, and the bottom surface, and the opening of the barrier groove is formed between the end of the first side away from the bottom surface and the end of the second side away from the bottom surface. The barrier portion protrudes from the first side surface; Based on this, the electrolyte at the bottom of the barrier tank can be prevented from rising upwards and thus seeping deep into the assembly gap of the top cover assembly.

[0021] In some embodiments, the barrier portion protrudes from the end of the first side wall away from the bottom surface; Based on this, the electrolyte at the bottom of the barrier tank can be prevented from rising upwards and thus seeping deep into the assembly gap of the top cover assembly.

[0022] In some embodiments, the insulating member has a first annular surface and a second annular surface, the first annular surface surrounding the outer periphery of the second annular surface, and a groove opening for a barrier groove is spaced between the first annular surface and the second annular surface. Along the depth direction of the barrier groove, the second annular surface protrudes from the side of the first annular surface away from the bottom wall of the barrier groove. Based on this, after the insulating component is assembled into the top cover assembly, the area where the first annular surface of the insulating component is located can be squeezed by the cover plate, so that the area where the first annular surface is located is squeezed to form a barrier part protruding from the inner wall of the barrier groove. Ultimately, this can prevent the electrolyte at the bottom of the barrier groove from rising upward and thus seeping into the depth of the assembly gap of the top cover assembly.

[0023] In some embodiments, the insulating element includes: A sealing portion, the sealing portion being disposed around the mounting hole and at least partially clamped and fixed between the cover plate and the pole post; and, The annular portion is connected to the outer periphery of the sealing portion, and the annular portion is provided with a barrier groove; This prevents electrolyte vapor from seeping into the mounting hole along the gap between the cover plate and the insulation, thus preventing damage to the electrode post and sealing ring.

[0024] In some embodiments, the pole post includes a through-hole and a connecting part, the through-hole being inserted through a mounting hole, and the connecting part being connected around the outer periphery of the through-hole and located on the side of the cover plate facing the core package; The inner circumferential edge of the sealing part is clamped and fixed between the connecting part and the side of the cover plate facing the core package.

[0025] In some embodiments, the insulating element further includes a rib that protrudes from the side of the sealing portion facing the connecting portion, and the rib is arranged around the through portion and abuts against the connecting portion. Based on this, the ribs allow the sealing part to be tightly clamped and fixed between the cover plate and the electrode post, thereby preventing electrolyte vapor from continuing to seep into the mounting hole along the gap between the cover plate and the insulating part, causing damage to the electrode post and the sealing ring.

[0026] In some embodiments, the insulating member further includes an anti-rotation protrusion, which is provided on the side of the sealing portion facing the connection portion. The anti-rotation protrusion is used to at least partially occupy the anti-rotation groove of the connection portion to limit relative rotation between the insulating member and the pole about the axis of the pole. Based on this, the stability and reliability of the installation of poles and insulation components can be improved.

[0027] Secondly, embodiments of this application provide a top cover assembly, including: A cover plate, used to cover the battery casing, has mounting holes for mounting terminals; and, A first insulating element, comprising the insulating element as described in the first aspect; Based on this, the top cover assembly has all the technical effects of the insulating element in the first aspect.

[0028] Thirdly, embodiments of this application provide a battery, comprising: The housing has interconnected cavities and openings; Core package, the core package is disposed in the receiving cavity; and, For example, in the second aspect, the top cover assembly has a cover plate connected to the housing to cover the opening, and the pole post connected to the core package; Based on this, the battery can have all the technical effects of the top cover assembly in the second aspect.

[0029] Fourthly, embodiments of this application provide an electrical device, including a battery as described in the third aspect; Based on this, electrical equipment can possess all the technical effects of batteries in the second aspect. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a top cover assembly provided in an embodiment of this application.

[0032] Figure 2 yes Figure 1 The exploded view of the top cover assembly is shown.

[0033] Figure 3 yes Figure 1 The top view of the top cover assembly shown.

[0034] Figure 4 yes Figure 3 The top cover assembly shown is a cross-sectional view along the AA direction.

[0035] Figure 5 yes Figure 4 A magnified view of the area at point X in the image.

[0036] Figure 6 yes Figure 5 The diagram shows the structure of the first insulating component before it is compressed and deformed.

[0037] Figure 7 yes Figure 4 A magnified view of the area at point Y.

[0038] Figure 8 yes Figure 2 The exploded view of the pole and the first insulating component is shown.

[0039] Explanation of reference numerals in the attached figures: 1. Cover plate; 11. Mounting hole; 12. Mounting groove; 2. Pole post; 21. Through-hole part; 22. Connecting part; 23. Anti-rotation groove; 3a. Insulating component; 3. First insulating component; 31. Barrier groove; 311. Annular portion; 312. First annular surface; 313. Second annular surface; 32. Return hole; 33. First side surface; 34. Second side surface; 35. Bottom surface; 36. Barrier portion; 37. Sealing portion; 38. Rib; 39. Anti-rotation protrusion; 4. Second insulating component; 5. Sealing ring. Detailed Implementation

[0040] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0041] This application provides a top cover assembly, a battery, and an electrical device to improve the safety and reliability of the top cover assembly.

[0042] Before introducing the top cover assembly of the embodiments of this application, we will first give an overall introduction to the technical solution of this application in conjunction with the battery.

[0043] Batteries can be used in electrical equipment.

[0044] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, 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, and 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. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0045] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0046] The vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc., and this application embodiment does not limit this. A battery is installed inside the vehicle. For example, the battery can be located at the bottom, front, or rear of the vehicle, and this application embodiment does not limit this.

[0047] The battery can be a cylindrical battery, a square battery, or a blade battery; this application does not limit the specific type of battery.

[0048] The battery may include a housing, a cell pack, and a top cover assembly. The housing has a receiving cavity and an opening, with the opening communicating with the receiving cavity. The cell pack is disposed in the receiving cavity. The top cover assembly is connected to the housing to close the opening.

[0049] Furthermore, the core package can be inserted into the receiving cavity through the opening, and then the top cover assembly can be connected to the housing to close the opening. At the same time, the top cover assembly can also be electrically connected to the core package for outputting electrical energy.

[0050] Please refer to Figure 1 The top cover assembly may include a cover plate 1, a pole post 2, and a first insulating element 3.

[0051] A cover plate 1 is used to cover the battery casing, and the cover plate 1 has mounting holes 11. A terminal post 2 passes through the mounting holes 11. A first insulating member 3 is disposed on the side of the cover plate 1 facing the battery cell pack. Therefore, the first insulating member 3 can be used for insulation between the cover plate 1 and the cell pack.

[0052] Please continue to refer to this. Figure 2 In some embodiments, the top cover assembly may also include a second insulating element 4 and a sealing ring 5, etc.

[0053] The second insulating element 4 is at least partially disposed on the side of the cover plate 1 away from the core package, and the second insulating element 4 is also at least partially disposed between the pole post 2 and the cover plate 1 for insulation between the top cover and the pole post 2.

[0054] For example, the cover plate 1 is also provided with a mounting groove 12. The opening of the mounting groove 12 is located on the side of the cover plate 1 away from the battery core pack. The mounting hole 11 is provided through the bottom wall of the mounting groove 12. The second insulating member 4 is at least partially provided in the mounting groove 12 and is arranged around the pole post 2.

[0055] The sealing ring 5 is used to seal the gap between the hole wall of the mounting hole 11 and the pole post 2.

[0056] It should be noted that the sealing ring 5 can be at least partially disposed between the hole wall of the mounting hole 11 and the pole post 2, or at least partially sandwiched between the first insulating member 3 and the bottom wall of the mounting groove 12, or at least partially sandwiched between the second insulating member 4 and the pole post 2. This application embodiment does not limit this.

[0057] The above is an overall introduction to the top cover assembly.

[0058] During battery storage, formation, and subsequent use, the electrolyte can easily generate vapor. This vapor can easily seep into the deep gaps in the assembly of the top cover assembly (such as the mounting holes 11 and mounting grooves 12), thereby damaging the battery.

[0059] Specifically, electrolyte vapor that seeps deep into the assembly gaps can easily condense at technical components such as the cover plate 1 and the terminal post 2 to form an electrolyte film. On the one hand, these electrolyte films are corrosive and can easily corrode the cover plate 1, the sealing ring 5, etc., leading to a decrease in the strength of the top cover assembly. On the other hand, under high pressure, the electrolyte film may become a conductive medium, thereby increasing the risk of creepage or micro-short circuits inside the cover plate 1 (such as between the positive and negative terminal posts 2), seriously affecting the safety performance and long-term reliability of the battery.

[0060] Based on this, in some embodiments, the first insulating member 3 is further provided with a barrier groove 31, which surrounds the mounting hole 11.

[0061] Thus, the barrier groove 31 can block the vapor formed by the electrolyte and the electrolyte formed by the condensation of the vapor within the barrier groove 31, thereby improving the ability of the vapor formed by the electrolyte and the electrolyte formed by the condensation of the vapor to continue to seep into the depth of the assembly gap of the top cover assembly (such as the mounting hole 11) along the gap between the cover plate 1 and the first insulating member 3, thereby improving the reliability and stability of the top cover assembly and the entire battery.

[0062] Please continue to refer to this. Figure 3 , Figure 4 and Figure 5 In some embodiments, the first insulating member 3 is further provided with a return hole 32, which is disposed through the wall of the barrier groove 31.

[0063] Furthermore, the electrolyte stored in the barrier tank 31 can flow back into the battery casing through the return hole 32. In this way, on the one hand, the electrolyte stored in the barrier tank 31 for a long time can be prevented from corroding and damaging the cover plate 1 and / or the first insulating component 3, and on the other hand, the total amount of electrolyte inside the casing can be increased to improve the charging and discharging efficiency of the battery.

[0064] In some embodiments, there are multiple reflux holes 32, and at least some of the reflux holes 32 are arranged circumferentially around the mounting hole 11; thus, through multiple reflux holes 32, the electrolyte at each location of the barrier tank 31 can be more easily returned to the housing.

[0065] In some embodiments, the return hole 32 is disposed through the bottom wall of the barrier groove 31; thereby, it can prevent the liquid at the bottom of the barrier groove 31 from accumulating and failing to flow back into the housing.

[0066] In some embodiments, the width of the barrier groove 31 tends to decrease along the direction from the opening of the groove to the bottom of the groove; thus, the electrolyte in the barrier groove 31 can easily collect to the bottom of the groove and then flow back into the housing through the return hole 32 that extends to the bottom wall of the barrier groove 31, thereby reducing the accumulation of liquid in the barrier groove 31. In addition, since the width of the groove opening is greater than the width of the groove bottom, the first insulating member 3 also has the advantage of being easy to demold during the manufacturing process.

[0067] Of course, in some other embodiments, the width of the barrier groove 31 may remain unchanged or increase along the direction from the opening of the barrier groove 31 to the bottom of the groove. This application embodiment does not limit this. The following mainly describes the example of the width of the barrier groove 31 decreasing along the direction from the opening of the barrier groove 31 to the bottom of the groove.

[0068] The barrier groove 31 can be a V-shaped groove, a U-shaped groove, or any other groove of any shape. This application embodiment does not limit this.

[0069] In some embodiments, the barrier groove 31 has a first side 33, a second side 34, and a bottom surface 35. The first side 33 is disposed around the mounting hole 11, the second side 34 is disposed around the outer periphery of the second side 34, and the bottom surface 35 is connected between the first side 33 and the second side 34, so that the barrier groove 31 is formed between the first side 33, the second side 34, and the bottom surface 35, and the opening of the barrier groove 31 is formed between the end of the first side 33 away from the bottom surface 35 and the end of the second side 34 away from the bottom surface 35.

[0070] In this way, the barrier groove 31 can be arranged around the mounting hole 11 so that the vapor formed by the electrolyte and / or the electrolyte formed by the condensation of the vapor can be blocked from seeping into the mounting hole 11 through the gap between the first insulating member 3 and the cover plate 1 on the outer periphery of the mounting hole 11.

[0071] In some embodiments, the reflux hole 32 extends to the bottom surface 35 so that the reflux hole 32 extends to the bottom wall of the barrier groove 31.

[0072] In some embodiments, at least one of the first side surface 33 and the second side surface 34 is inclined relative to the bottom surface 35.

[0073] In this way, by setting it at an angle, the width of the barrier tank 31 tends to decrease along the direction from the opening of the barrier tank 31 to the bottom of the tank, which facilitates the collection of electrolyte in the barrier tank 31 to the bottom of the barrier tank 31 (i.e., the bottom surface 35), and then the electrolyte flows back into the housing through the return hole 32 that extends to the bottom surface 35, thereby reducing the accumulation of liquid in the barrier tank 31.

[0074] In some embodiments, the included angle between the first side surface 33 and the bottom surface 35 is A1, where A1 is greater than 90° and less than or equal to 135°.

[0075] Thus, on the one hand, by making A1 greater than 90°, the width of the barrier groove 31 tends to decrease along the direction from the opening of the groove to the bottom of the groove; on the other hand, by making A1 less than or equal to 135°, the inclination of the first side surface 33 relative to the bottom surface 35 is prevented from being too small, which would prevent the electrolyte attached to the first side surface 33 from smoothly collecting into droplets and flowing to the bottom surface 35. Therefore, this embodiment of the application allows the electrolyte in the barrier groove 31 to smoothly collect at the bottom surface 35, so that it can flow back into the housing through the return hole 32 at the bottom surface 35.

[0076] For example, A1 can be 91°, 95°, 98.3°, 99°, 100°, 105°, 111°, 117.3°, 120°, 124°, 128.5°, 130°, 132°, 134.7° or 135°, and the embodiments of this application do not limit this.

[0077] In some embodiments, the included angle between the second side surface 34 and the bottom surface 35 is A2, which is greater than 90° and less than or equal to 135°.

[0078] Thus, on the one hand, by making A2 greater than 90°, the width of the barrier groove 31 tends to decrease along the direction from the opening of the groove to the bottom of the groove; on the other hand, by making A2 less than or equal to 135°, the inclination of the first side surface 33 relative to the bottom surface 35 is prevented from being too small, which would prevent the electrolyte attached to the first side surface 33 from smoothly collecting into droplets and flowing to the bottom surface 35. Therefore, this embodiment of the application allows the electrolyte in the barrier groove 31 to smoothly collect at the bottom surface 35, so that it can flow back into the housing through the return hole 32 at the bottom surface 35.

[0079] For example, A2 can be 91°, 95°, 98.3°, 99°, 100°, 105°, 111°, 117.3°, 120°, 124°, 128.5°, 130°, 132°, 134.7° or 135°, and the embodiments of this application do not limit this.

[0080] In some embodiments, the width of the opening of the barrier groove 31 is W1, which is greater than or equal to 0.55 mm and less than or equal to 1.1 mm.

[0081] Thus, by making W1 greater than or equal to 0.55 mm, the barrier groove 31 can be prevented from being too small to store enough electrolyte, and by making W1 less than or equal to 1.1 mm, the barrier groove 31 can be prevented from being too large to reduce the strength of the first insulating member 3.

[0082] For example, W1 can be 0.55 mm, 0.6 mm, 0.63 mm, 0.7 mm, 0.84 mm, 0.9 mm, 1 mm, 1.04 mm, or 1.1 mm, and this application embodiment does not limit it.

[0083] In some embodiments, the bottom width of the barrier groove 31 is W2, which is greater than or equal to 0.3 mm and less than or equal to 0.5 mm.

[0084] Thus, by making W2 greater than or equal to 0.3 mm, the barrier groove 31 can be prevented from being too small to store enough electrolyte, and by making W2 less than or equal to 0.5 mm, the barrier groove 31 can be prevented from being too large to reduce the strength of the first insulating member 3.

[0085] For example, W2 can be 0.3 mm, 0.32 mm, 0.35 mm, 0.38 mm, 0.4 mm, 0.45 mm, 0.493 mm, or 0.5 mm, and this application embodiment does not limit it.

[0086] In some embodiments, the depth of the barrier groove 31 is D, which is greater than or equal to 0.35 mm and less than or equal to 0.65 mm.

[0087] Thus, by ensuring that D is greater than or equal to 0.35 mm, the barrier groove 31 is prevented from being too small to store enough electrolyte, and by ensuring that D is less than or equal to 0.65 mm, the barrier groove 31 is prevented from being too large to reduce the strength of the first insulating member 3.

[0088] For example, D can be 0.35 mm, 0.38 mm, 0.4 mm, 0.45 mm, 0.493 mm, 0.5 mm, 0.53 mm, 0.58 mm, 0.6 mm, or 0.65 mm, and this application embodiment does not limit this.

[0089] In some embodiments, the barrier groove 31 has a barrier portion 36 protruding from its sidewall; thereby, the electrolyte at the bottom of the barrier groove 31 can be prevented from rising upward and thus seeping into the depth of the assembly gap of the top cover assembly.

[0090] In some embodiments, the barrier portion 36 protrudes from the first side surface 33. Therefore, compared to the barrier portion 36 protruding from the second side surface 34, in this embodiment, the barrier portion 36 does not obstruct the flow of electrolyte from the second side surface 34 to the bottom surface 35 of the barrier tank 31, and can also prevent the electrolyte from the bottom surface 35 of the barrier tank 31 from rising upward and seeping into the mounting hole 11 and other locations.

[0091] In some embodiments, the barrier portion 36 protrudes from the end of the first side surface 33 away from the bottom surface 35; thereby, it can prevent the electrolyte at the bottom surface 35 of the barrier groove 31 from rising upward and seeping into the mounting hole 11 and other locations.

[0092] In some embodiments, the barrier portion 36 may be formed by compressing the first insulating member 3.

[0093] Please continue to refer to this. Figure 6 For example, the first insulating member 3 has a first annular surface 312 and a second annular surface 313. The first annular surface 312 surrounds the outer periphery of the second annular surface 313, and a groove opening of a barrier groove 31 is spaced between the first annular surface 312 and the second annular surface 313. Along the groove depth direction of the barrier groove 31, the second annular surface 313 protrudes from the side of the first annular surface 312 away from the bottom wall of the barrier groove 31.

[0094] Furthermore, after the first insulating component 3 is assembled to the top cover assembly, the area where the first annular surface 312 of the first insulating component 3 is located can be squeezed by the cover plate 1, so that the area where the first annular surface 312 is located is squeezed to form a barrier part 36 protruding from the inner wall of the barrier groove 31. Ultimately, this can prevent the electrolyte at the bottom of the barrier groove 31 from rising upward and thus seeping into the depth of the assembly gap of the top cover assembly.

[0095] Of course, in some other embodiments, the first insulating member 3 may have the blocking portion 36 in a non-deformed state. For example, the blocking portion 36 may be directly formed on the inner wall of the blocking groove 31 by injection molding, and this application embodiment does not limit this.

[0096] In some embodiments, the first insulating member 3 includes a sealing portion 37, which is disposed around the mounting hole 11 and is at least partially clamped and fixed between the cover plate 1 and the pole post 2. An annular portion 311 is connected to the outer peripheral side of the sealing portion 37 and is provided with a barrier groove 31.

[0097] Furthermore, this prevents electrolyte vapor from seeping into the mounting hole 11 along the gap between the cover plate 1 and the first insulating member 3, thus preventing damage to the electrode post 2 and the sealing ring 5. It can also be understood that, through the cooperation between the sealing part 37 and the barrier groove 31, the electrolyte vapor and electrolyte blocked by the sealing part 37 can be stored in the barrier groove 31.

[0098] For example, the pole post 2 includes a through portion 21 and a connecting portion 22. The through portion 21 passes through the mounting hole 11. The connecting portion 22 surrounds and connects to the outer periphery of the through portion 21 and is located on the side of the cover plate 1 facing the core package. The inner periphery edge of the sealing portion 37 is clamped and fixed between the connecting portion 22 and the side of the cover plate 1 facing the core package, thereby clamping and fixing the sealing portion 37 between the cover plate 1 and the pole post 2.

[0099] Please continue to refer to this. Figure 7 In some embodiments, the first insulating member 3 further includes a rib 38, which protrudes from the side of the sealing part 37 facing the connecting part 22. The rib 38 is arranged around the through part 21 and abuts against the connecting part 22. Furthermore, the rib 38 allows the sealing part 37 to be tightly clamped and fixed between the cover plate 1 and the electrode post 2, thereby preventing electrolyte vapor from continuing to seep into the mounting hole 11 along the gap between the cover plate 1 and the first insulating member 3 and causing damage to the electrode post 2 and the sealing ring 5.

[0100] Please continue to refer to this. Figure 8 In some embodiments, the first insulating member 3 further includes an anti-rotation protrusion 39, which protrudes from the sealing part 37 on the side facing the connecting part 22. The connecting part 22 is provided with an anti-rotation groove 23, and the anti-rotation protrusion 39 is at least partially disposed in the anti-rotation groove 23 to restrict the relative rotation of the first insulating member 3 and the pole post 2 around the axis of the pole post 2; thereby improving the stability and reliability of the installation of the pole post 2 and the first insulating member 3.

[0101] The number of anti-rotation protrusions 39 can be one or at least two, and this application embodiment does not limit this.

[0102] For example, there are two anti-rotation protrusions 39, with protrusions in two directions distributed on opposite sides of the pole post 2.

[0103] This application embodiment also provides an insulating component for a top cover assembly. The top cover assembly further includes a cover plate 1, which is used to cover the battery casing. The cover plate 1 has a mounting hole 11 for mounting a terminal post 2. An insulating component 3a is disposed on the side of the cover plate 1 facing the battery core pack. The side of the insulating component 3a facing the cover plate 1 has a blocking groove 31, which is used to surround the mounting hole 11.

[0104] Thus, the barrier groove 31 can block the vapor formed by the electrolyte and the electrolyte formed by the condensation of the vapor within the barrier groove 31, thereby improving the ability of the vapor formed by the electrolyte and the electrolyte formed by the condensation of the vapor to continue to seep into the depth of the assembly gap of the top cover assembly (such as the mounting hole 11) along the gap between the cover plate 1 and the insulating component 3a, thereby improving the reliability and stability of the top cover assembly and the entire battery.

[0105] In some embodiments, the specific structure of the insulating member 3a can be referred to the specific structure of the first insulating member 3 described above, and will not be repeated here in the embodiments of this application.

[0106] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An insulating component for a top cover assembly, characterized in that, The top cover assembly also includes a cover plate (1) for covering the battery casing, the cover plate (1) having mounting holes (11) for mounting terminals (2); wherein, The insulating member (3a) is provided on the side of the cover plate (1) facing the battery core pack. The insulating member (3a) is provided with a barrier groove (31) on the side facing the cover plate (1). The barrier groove (31) is provided around the mounting hole (11).

2. The insulating component according to claim 1, characterized in that, The insulating component (3a) is also provided with a return hole (32), which extends through the wall of the barrier groove (31).

3. The insulating component according to claim 2, characterized in that, The number of the return holes (32) is multiple, and at least some of the return holes (32) are arranged circumferentially around the mounting hole (11).

4. The insulating element according to claim 2 or 3, characterized in that, The reflux hole (32) extends through the bottom wall of the barrier groove (31).

5. The insulating member according to any one of claims 1 to 4, characterized in that, Along the direction from the opening of the barrier groove (31) to the bottom of the groove, the width of the barrier groove (31) tends to decrease.

6. The insulating member according to any one of claims 1 to 5, characterized in that, The barrier groove (31) has a first side (33), a second side (34) and a bottom surface (35). The first side (33) is arranged around the mounting hole (11), and the second side (34) is arranged around the outer periphery of the second side (34). The bottom surface (35) is connected between the first side (33) and the second side (34) so ​​that the barrier groove (31) is formed between the first side (33), the second side (34) and the bottom surface (35). The opening of the barrier groove (31) is formed between the end of the first side (33) away from the bottom surface (35) and the end of the second side (34) away from the bottom surface (35). At least one of the first side surface (33) and the second side surface (34) is inclined relative to the bottom surface (35).

7. The insulating component according to claim 6, characterized in that, The included angle between the first side surface (33) and the bottom surface (35) is A1, where A1 is greater than 90° and less than or equal to 135°; and / or, The included angle between the second side surface (34) and the bottom surface (35) is A2, which is greater than 90° and less than or equal to 135°.

8. The insulating element according to any one of claims 1 to 7, characterized in that, The width of the opening of the barrier groove (31) is W1, where W1 is greater than or equal to 0.55 mm and less than or equal to 1.1 mm; and / or, The bottom width of the barrier groove (31) is W2, where W2 is greater than or equal to 0.3 mm and less than or equal to 0.5 mm; and / or, The depth of the barrier groove (31) is D, which is greater than or equal to 0.35 mm and less than or equal to 0.65 mm.

9. The insulating element according to any one of claims 1 to 8, characterized in that, The barrier groove (31) has a barrier part (36) protruding from its side wall.

10. The insulating element according to claim 9, characterized in that, The barrier groove (31) has a first side (33), a second side (34) and a bottom surface (35). The first side (33) is arranged around the mounting hole (11), and the second side (34) is arranged around the outer periphery of the second side (34). The bottom surface (35) is connected between the first side (33) and the second side (34) so ​​that the barrier groove (31) is formed between the first side (33), the second side (34) and the bottom surface (35). The opening of the barrier groove (31) is formed between the end of the first side (33) away from the bottom surface (35) and the end of the second side (34) away from the bottom surface (35). The barrier portion (36) protrudes from the first side surface (33).

11. The insulating element according to claim 10, characterized in that, The barrier portion (36) protrudes from the end of the first side surface (33) away from the bottom surface (35).

12. The insulating element according to any one of claims 1 to 8, characterized in that, The insulating member (3a) has a first annular surface (312) and a second annular surface (313), the first annular surface (312) surrounds the outer periphery of the second annular surface (313), and the opening of the barrier groove (31) is spaced between the first annular surface (312) and the second annular surface (313). Along the depth direction of the barrier groove (31), the second annular surface (313) protrudes from the side of the first annular surface (312) away from the bottom wall of the barrier groove (31).

13. The insulating element according to any one of claims 1 to 12, characterized in that, Insulating element (3a) includes: A sealing part (37) is provided around the mounting hole (11) and is at least partially clamped and fixed between the cover plate (1) and the pole post (2); and, The annular portion (311) is connected to the outer periphery of the sealing portion (37), and the annular portion (311) is provided with the barrier groove (31).

14. The insulating element according to claim 13, characterized in that, The pole post (2) includes a through part (21) and a connecting part (22). The through part (21) passes through the mounting hole (11), and the connecting part (22) is connected around the outer periphery of the through part (21) and is located on the side of the cover plate (1) facing the core package. The inner circumferential edge of the sealing part (37) is used to clamp and fix it between the connecting part (22) and the cover plate (1) on the side facing the core package.

15. The insulating element according to claim 14, characterized in that, The insulating component (3a) further includes a rib (38), which protrudes from the sealing portion (37) on the side facing the connecting portion (22). The rib (38) surrounds the through portion (21) and abuts against the connecting portion (22).

16. The insulating element according to claim 14 or 15, characterized in that, The insulating component (3a) further includes an anti-rotation protrusion (39), which protrudes from the sealing portion (37) on the side facing the connecting portion (22). The anti-rotation protrusion (39) is at least partially disposed in the anti-rotation groove (23) of the connecting portion (22) to restrict the relative rotation of the insulating component (3a) and the pole post (2) about the axis of the pole post (2).

17. A top cover assembly, characterized in that, include: Cover plate (1), the cover plate (1) being used to cover the battery casing, the cover plate (1) having mounting holes (11) for mounting terminals (2); and, The first insulating element (3) includes the insulating element (3a) as described in any one of claims 1 to 16.

18. A battery, characterized in that, include: A housing having interconnected cavities and openings; A core package, wherein the core package is disposed in the receiving cavity; and, The top cover assembly as claimed in claim 17, wherein the cover plate (1) is connected to the housing to cover the opening, and the pole post (2) is connected to the core package.

19. An electrical appliance, characterized in that, Includes the battery as described in claim 18.

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