Battery cover plate assembly, battery and manufacturing method

Abstract

This application relates to the field of battery technology and discloses a battery cover assembly, a battery, and a manufacturing method thereof. The assembly includes a plate, terminals, a sealing ring, and a fixing ring. The plate has a positioning groove, and a positioning hole penetrating the plate is provided at the bottom of the positioning groove. A connecting plate extends radially from the periphery of the terminal, dividing the terminal into a connecting section and a positioning section. The positioning section is connected to the positioning hole. The sealing ring is fitted onto the positioning section, and the sealing ring is interference-fitted with the positioning hole. The fixing ring is disposed within the positioning groove and has an inner hole. The connecting section penetrates the inner hole of the fixing ring, and a first gap is provided between the connecting plate and the inner hole. Insulating adhesive is disposed within the first gap. The battery cover assembly, battery, and manufacturing method disclosed in this application solve or improve the problem of poor insulation stability between the terminal and the cover.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to battery cover assembly, battery, and manufacturing method. Background Technology

[0002] Battery technology is widely used in electric vehicles, creating significant economic benefits for society. The battery cover is a crucial component of the battery; the terminals are mounted on the cover and are used to connect the battery cells and output electrical energy. Therefore, it is essential to ensure stable insulation between the terminals and the cover.

[0003] In related technologies, a recessed platform is provided on the cover plate, and a terminal hole is opened at the bottom of the recessed platform. The reinforcing member can be positioned on the recessed platform. The terminal and the reinforcing member are placed and positioned in the glue injection device to ensure that there is a glue injection gap between the terminal and the reinforcing member. The glue injection device injects glue into the glue injection gap to insulate the terminal and the reinforcing member. The glue injection device can also wrap the outer periphery of the reinforcing member with glue. A welding part is reserved on the outer periphery of the reinforcing member. The welding part is not wrapped with glue. The reinforcing member is positioned on the recessed platform, and the welding part is welded to the cover plate, thereby positioning the terminal on the cover plate.

[0004] However, when welding the reinforcing parts, the welding position is close to the rubber coating position, and the welding temperature is high, which can easily damage the plastic, reduce the insulation effect between the pole and the reinforcing parts, and result in poor insulation stability between the pole and the cover plate. Summary of the Invention

[0005] This application provides a battery cover assembly, a battery, and a manufacturing method to solve or improve the problem of poor insulation stability between the terminal and the cover.

[0006] In a first aspect, this application provides a battery cover assembly, comprising:

[0007] The plate body is provided with a positioning groove, and the bottom of the positioning groove is provided with a positioning hole that penetrates the plate body;

[0008] A pole post, wherein a connecting plate extends radially from its periphery, the connecting plate dividing the pole post into a connecting section and a positioning section, the positioning section being connected through the positioning hole;

[0009] A sealing ring is fitted onto the positioning section, and the sealing ring is interference-fitted with the positioning hole;

[0010] A fixing ring is disposed in the positioning groove. The fixing ring has an inner hole. The connecting section passes through the inner hole of the fixing ring. A first gap is provided between the connecting plate and the inner hole. Insulating glue is disposed in the first gap.

[0011] Beneficial effects: The sealing ring is fitted onto the positioning section of the pole post, and the positioning section of the pole post passes through the positioning hole, so that the sealing ring is located between the positioning section and the positioning hole. The sealing ring and the positioning hole are interference fit, which can position the connecting section on the positioning hole and can insulate the pole post from the plate. The fixing ring is fixed on the positioning groove. Specifically, the fixing ring can be fixed on the positioning groove by welding, that is, the fixing ring is fixed on the plate. While the connecting section of the pole post passes through the inner hole of the fixing ring, it is ensured that the inner hole of the fixing ring and the connecting plate form a first gap. The plate is placed in the glue injection device, and the glue injection device injects glue into the first gap, so that the first gap is filled with insulating glue. The connecting section of the pole post and the fixing ring are wrapped with glue, connecting the pole post and the fixing ring, and can insulate the pole post and the fixing ring.

[0012] Compared to related technologies, positioning the electrode post on the cover plate requires first positioning the electrode post and retaining ring on a fixture in existing technology, then applying adhesive to fix the electrode post and retaining ring, and finally positioning the electrode post on the cover plate by welding the retaining ring to the cover plate. This application addresses this by setting a positioning section on the electrode post to position it on the plate, then welding the retaining ring to the plate, and finally applying adhesive to both the retaining ring and the electrode post. This welding-first-then-adhesive approach solves the problem of welding affecting the adhesive application and improves the insulation stability between the electrode post and the plate.

[0013] In one alternative embodiment, the sealing ring extends radially from the end face near the connecting plate to form an abutment portion, the two sides of which abut against the bottom of the connecting plate and the positioning groove, respectively.

[0014] In one alternative embodiment, an abutment plate extends radially from one end face of the fixing ring away from the positioning groove toward the inner hole, and a second gap is provided between the abutment plate and the connecting plate, the first gap communicating with the second gap, and the insulating adhesive being disposed within the second gap.

[0015] In one alternative embodiment, the end face of the retaining ring away from the abutment plate extends radially away from the inner hole to form a positioning plate, and the positioning plate is fixedly connected to the positioning groove.

[0016] In one alternative embodiment, the retaining ring has a through hole extending radially therethrough, one end of which communicates with the first gap.

[0017] In one optional embodiment, the sealing ring has an L-shaped longitudinal section, and the longitudinal section of the sealing ring is parallel to the axial direction of the pole post.

[0018] In one optional embodiment, the circumference of the fixing ring is provided with reinforcing ribs, and the positioning plate and the reinforcing ribs are spaced apart along the axial direction of the fixing ring.

[0019] In one optional embodiment, the positioning groove, the positioning hole, the pole post, the inner hole, the fixing ring, and the positioning plate are coaxially arranged.

[0020] In an alternative embodiment, an insulating plate is further included, one side of which is adapted to be disposed at one end of the battery, and the other side of which is disposed on the plate body and located between the battery and the plate body.

[0021] In one optional embodiment, the insulating plate has a groove, the plate body has a mounting hole corresponding to the groove, and the insulating plate has a through hole, which corresponds to the positioning hole.

[0022] It also includes an explosion-proof valve, which is installed on the plate and located between the plate and the insulating plate, and the explosion-proof valve blocks the mounting hole and the groove opening.

[0023] In one alternative embodiment, a protective film is also included, which covers the mounting hole.

[0024] In one alternative embodiment, the bottom of the groove is provided with a plurality of vent holes.

[0025] In one alternative embodiment, the connecting plate has at least one notch on its periphery, and the notch communicates with the first gap.

[0026] Secondly, this application also provides a method for manufacturing a battery cover assembly, applicable to a battery cover assembly, the method comprising:

[0027] S1, Place the sealing ring on the positioning section;

[0028] S2, The sealing ring is placed inside the positioning hole and is interference-fitted with the positioning hole;

[0029] S3, fix the retaining ring in the positioning groove, and set the inner hole of the retaining ring and the positioning hole coaxially;

[0030] S4, the board is placed in the glue injection device, and the glue injection device injects glue into the first gap.

[0031] Thirdly, this application also provides a battery, including: a battery cover assembly. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this application, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of a battery cover assembly according to an embodiment of this application;

[0034] Figure 2 This is an exploded view of a battery cover assembly according to an embodiment of this application;

[0035] Figure 3 for Figure 1 Top view;

[0036] Figure 4 for Figure 3 A sectional view along the middle AA;

[0037] Figure 5 for Figure 4 A magnified view of part B in the image;

[0038] Figure 6 This is a schematic diagram of the structure of the electrode post in a battery cover assembly according to an embodiment of this application;

[0039] Figure 7 This is a flowchart illustrating a method for manufacturing a battery cover assembly according to an embodiment of this application.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Plate body; 101. Positioning groove; 102. Positioning hole; 103. Mounting hole; 2. Pole post; 201. Connecting plate; 202. Connecting section; 203. Positioning section; 204. Body; 205. Connecting cylinder; 3. Sealing ring; 301. Abutting part; 302. Sealing ring; 4. Fixing ring; 401. Inner hole; 402. Abutting plate; 403. Positioning plate; 404. Perforation; 5. First gap; 6. Second gap; 7. Insulating plate; 701. Groove; 702. Through hole; 703. Vent hole; 8. Explosion-proof valve; 9. Protective film; 10. Colloidal insulating sleeve. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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, 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.

[0043] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] Battery technology is widely used in electric vehicles, creating significant economic benefits for society. The battery cover is a crucial component of the battery; the terminals are mounted on the cover and are used to connect the battery cells and output electrical energy. Therefore, it is essential to ensure stable insulation between the terminals and the cover.

[0045] In related technologies, a recessed platform is provided on the cover plate, and a terminal hole is opened at the bottom of the recessed platform. The reinforcing member can be positioned on the recessed platform. The terminal and the reinforcing member are placed and positioned in the glue injection device to ensure that there is a glue injection gap between the terminal and the reinforcing member. The glue injection device injects glue into the glue injection gap to insulate the terminal and the reinforcing member. The glue injection device can also wrap the outer periphery of the reinforcing member with glue. A welding part is reserved on the outer periphery of the reinforcing member. The welding part is not wrapped with glue. The reinforcing member is positioned on the recessed platform, and the welding part is welded to the cover plate, thereby positioning the terminal on the cover plate.

[0046] However, when welding the reinforcing member, the welding position is close to the overmolding position, and the high welding temperature can easily damage the plastic, reducing the insulation effect between the terminal and the reinforcing member, resulting in poor insulation stability between the terminal and the cover plate. Therefore, this application provides a battery cover plate assembly, a battery, and a manufacturing method to solve or improve the problem of poor insulation stability between the terminal and the cover plate.

[0047] The following is combined with Figures 1 to 7 This describes an embodiment of the present application.

[0048] According to embodiments of this application, in one aspect, a battery cover assembly is provided, including: a plate 1, a terminal post 2, a sealing ring 3, and a fixing ring 4, specifically, as shown in... Figure 2 , Figure 5 and Figure 6 As shown, the plate 1 is provided with a positioning groove 101, and the bottom of the positioning groove 101 is provided with a positioning hole 102 that penetrates the plate 1; a connecting plate 201 extends radially from the periphery of the pole post 2, and the connecting plate 201 divides the pole post 2 into a connecting section 202 and a positioning section 203, and the positioning section 203 is connected to the positioning hole 102; a sealing ring 3 is sleeved on the positioning section 203, and the sealing ring 3 is press-fitted with the positioning hole 102; a fixing ring 4 is provided in the positioning groove 101, and the fixing ring 4 has an inner hole 401, the connecting section 202 penetrates the inner hole 401 of the fixing ring 4, and a first gap 5 is provided between the connecting plate 201 and the inner hole 401, and insulating glue is provided in the first gap 5.

[0049] In this embodiment, such as Figure 2 , Figure 5 and Figure 6As shown, the sealing ring 3 has an insulating function and can be made of rubber. The sealing ring 3 is sleeved on the positioning section 203 of the pole post 2, and the positioning section 203 of the pole post 2 passes through the positioning hole 102, so that the sealing ring 3 is located between the positioning section 203 and the positioning hole 102. The sealing ring 3 and the positioning hole 102 are interference-fitted, which can position the connecting section 202 on the positioning hole 102 and can insulate the pole post 2 from the plate 1. The fixing ring 4 is fixed on the positioning groove 101. Specifically, the fixing ring 4 can be fixed by welding. The fixing ring 4 is fixed on the positioning groove 101, that is, the fixing ring 4 is fixed on the plate 1. The connecting section 202 of the pole post 2 passes through the inner hole 401 of the fixing ring 4, while ensuring that the inner hole 401 of the fixing ring 4 and the connecting plate 201 form a first gap 5. The plate is placed in the glue injection device, and the glue injection device injects glue into the first gap 5, so that the first gap 5 is filled with insulating glue. The connecting section 202 of the pole post 2 and the fixing ring 4 are wrapped with glue, connecting the pole post 2 and the fixing ring 4, and is able to insulate the pole post 2 and the fixing ring 4.

[0050] Compared to related technologies, positioning the pole post 2 on the cover plate requires first positioning the pole post 2 and the fixing ring 4 on a fixture in the prior art, then applying adhesive to fix the pole post 2 and the fixing ring 4, and finally positioning the pole post 2 on the cover plate by welding the fixing ring 4 to the cover plate. This application addresses this by providing a positioning section 203 on the pole post 2 to position it on the plate body 1, then welding the fixing ring 4 to the plate body 1, and finally applying adhesive to both the fixing ring 4 and the pole post 2. This welding-first-then-applying approach solves the problem of welding affecting the applicator and improves the insulation stability between the pole post 2 and the plate body 1.

[0051] Specifically, such as Figure 2 As shown, after coating, a gel insulating sleeve 10 is formed.

[0052] In some embodiments, the pole post 2 includes a body 204 and a connecting cylinder 205, such as Figure 5 and Figure 6 As shown, the main body 204 is inserted and fixed inside the connecting cylinder 205. The edge of the opening of the connecting cylinder 205 extends radially away from the main body 204 to form a connecting plate 201. The connecting cylinder 205 is the positioning section 203 of the pole post 2.

[0053] In some embodiments, such as Figure 2 and Figure 3 As shown, plate 1 is a cuboid with a radius of 2.9 mm at its four corners. The bottom and sides of plate 1 are connected by an arc-shaped surface with a radius of 0.5 mm. The length of the arc-shaped surface accounts for 70% of the length of the side surface.

[0054] In one embodiment, such as Figure 5As shown, the sealing ring 3 extends radially from the end face near the connecting plate 201 to form an abutment portion 301, and the two sides of the abutment portion 301 abut against the bottom of the connecting plate 201 and the positioning groove 101, respectively.

[0055] In this embodiment, such as Figure 5 As shown, the abutment portion 301 can isolate the connecting plate 201 and the positioning groove 101.

[0056] In one embodiment, such as Figure 5 As shown, the end face of the fixing ring 4 away from the positioning groove 101 extends radially toward the inner hole 401 to form an abutment plate 402. A second gap 6 is provided between the abutment plate 402 and the connecting plate 201. The first gap 5 communicates with the second gap 6. Insulating glue is provided in the second gap 6. The abutment part 301 is flexible.

[0057] In this embodiment, such as Figure 5 As shown, the plate 1 is placed in the glue injection device, and the glue injection device presses the pole 2 downward along the axial direction, so that the connecting plate 201 squeezes the abutment part 301. Since the abutment part 301 is flexible, it can be compressed, so that a second gap 6 is formed between the connecting plate 201 and the abutment plate 402. The second gap 6 is connected to the first gap 5. Therefore, during glue injection, the insulating glue can fill the first gap 5 and the second gap 6, fixing the pole 2 and the fixing ring 4 together. The insulating glue has an insulating function. Through the insulating glue and the sealing ring 3, the pole 2 is insulated from the plate 1 and the fixing ring 4.

[0058] In some embodiments, such as Figure 2 As shown, two positioning holes 102 are provided on the plate 1 to position the positive terminal and the negative terminal respectively. When the positive terminal is coated with glue, PPS (polyphenylene sulfide) is used for coating. The PPS material is wrapped on the surface of the positive terminal and the fixing ring 4 through the injection molding process, and filled into the first gap 5 and the second gap 6. It is widely used for insulation protection of precision components such as motor stator cores and connectors.

[0059] When encapsulating the negative electrode post, LCP (liquid crystal polymer) encapsulation is used. The LCP material is wrapped around the surface of the negative electrode post and the fixing ring 4 through injection molding process, and also filled into the first gap 5 and the second gap 6. It is widely used for insulation protection of precision components such as motor stator cores and connectors.

[0060] In some embodiments, such as Figure 2 , Figure 5 and Figure 6As shown, the abutment portion 301 has an annular plate structure, and its thickness along the axial direction of the pole post 2 is 12mm to 14mm. Specifically, the thickness of the abutment portion 301 along the axial direction of the pole post 2 is 13mm, and the compression amount in the glue injection device is 7mm. Therefore, the second gap 6 between the abutment plate 402 and the connecting plate 201 is at least 6mm in the axial direction of the pole post 2, allowing the insulating glue to easily enter the second gap 6. Simultaneously, the compression of the abutment portion 301 increases the pressure between the abutment portion 301 and the connecting plate 201 and the bottom of the positioning groove 101, thereby improving the sealing performance between the pole post 2 and the positioning hole 102.

[0061] In one embodiment, such as Figure 5 As shown, the end face of the fixing ring 4 away from the abutment plate 402 extends radially away from the inner hole 401 to form a positioning plate 403, and the positioning plate 403 is fixedly connected to the positioning groove 101.

[0062] In this embodiment, such as Figure 2 and Figure 5 As shown, the positioning plate 403 is connected to the positioning groove 101, which can position the fixing ring 4. Then, the positioning plate 403 is fixed to the plate body 1 by welding, which improves the connection strength between the fixing ring 4 and the plate body 1. Furthermore, the fixing ring 4 is welded to the plate body 1 first, and then the adhesive is applied. This is the opposite of the process steps of applying adhesive first and then welding in related technologies. This can prevent the welding of the fixing ring 4 from affecting the insulating adhesive, avoid the insulating adhesive from melting due to heat, and avoid affecting the insulation stability between the pole 2 and the plate body 1.

[0063] In one embodiment, the retaining ring 4 has a through hole 404 extending radially through it, and one end of the through hole 404 is connected to the first gap 5.

[0064] In this embodiment, during the glue injection process, the insulating glue penetrates through the perforation 404 and fills the first gap 5 and the second gap 6, connecting the fixing ring 4 and the pole post 2.

[0065] In one embodiment, such as Figure 5 As shown, the longitudinal section of the sealing ring 3 is L-shaped, and the longitudinal section of the sealing ring 3 is parallel to the axial direction of the pole post 2.

[0066] In this embodiment, such as Figure 5 As shown, the sealing ring 3 includes an abutment portion 301 perpendicular to the axial direction of the pole post 2 and a sealing ring 302 arranged along the axial direction of the pole post 2. The outer wall of the sealing ring 302 is press-fitted with the positioning hole 102. The sealing ring 302 is sleeved on the positioning section 203 and press-fitted with the positioning section 203, which can position the pole post 2 on the positioning hole 102 and can make the pole post 2 insulated from the plate 1.

[0067] In one embodiment, the circumference of the fixing ring 4 is provided with reinforcing ribs, and the positioning plate 403 and the reinforcing ribs are spaced apart along the axial direction of the fixing ring 4.

[0068] In this embodiment, the reinforcing rib is a ring plate structure, and the reinforcing rib and the positioning plate 403 are spaced apart. The reinforcing rib can improve the strength of the fixing ring 4, and during the glue injection, the insulating glue is filled between the reinforcing rib and the positioning plate 403, which can improve the strength of the insulating glue adhering to the fixing ring 4.

[0069] In one embodiment, such as Figure 2 As shown, the positioning groove 101, positioning hole 102, pole post 2, inner hole 401, fixing ring 4 and positioning plate 403 are coaxially arranged.

[0070] In this embodiment, the installation of the positioning plate 403 and the pole post 2 is facilitated.

[0071] In one embodiment, such as Figure 2 As shown, it also includes an insulating plate 7, one side of which is adapted to be disposed at one end of the battery, and the other side of which is disposed on the plate body 1 and located between the battery and the plate body 1.

[0072] In this embodiment, the insulating plate 7 is disposed at one end of the battery, which can insulate the battery and the plate body 1.

[0073] In some embodiments, the insulating board 7 is produced by injection molding. After the insulating board 7 is positioned with the board body 1, it is fixed to the board body 1 by ultrasonic heat fusion.

[0074] In one embodiment, such as Figure 2 As shown, the insulating plate 7 has a groove 701, and the plate body 1 has a mounting hole 103 corresponding to the groove 701. The insulating plate 7 has a through hole 702, which corresponds to the positioning hole 102.

[0075] It also includes an explosion-proof valve 8, which is installed on the plate 1 and located between the plate 1 and the insulating plate 7. The explosion-proof valve 8 blocks the mounting hole 103 and the groove 701.

[0076] In some embodiments, such as Figure 2 As shown, the explosion-proof valve 8 is installed on the corresponding mounting hole 103 of the plate body 1, and the explosion-proof valve 8 and the plate body 1 are fixed by laser welding, so that the airtightness of the explosion-proof valve 8 and the mounting hole 103 and the burst value of the explosion-proof valve 8 meet the industry requirements.

[0077] In some embodiments, such as Figure 2As shown, the explosion-proof valve 8 protrudes upward along the axial direction of the pole post 2 to form a protrusion. The edge of the protrusion forms a fixing plate, which is parallel to the plate body 1. The protrusion is located in the mounting hole 103. The fixing plate is sandwiched between the plate body 1 and the insulating plate 7. The thickness of the protrusion is thinner than that of the fixing plate, and it can withstand less pressure. When the battery runs out of control, the protrusion can be broken by the air pressure to release the high-pressure gas in the battery and prevent the battery casing from exploding.

[0078] In some embodiments, the retaining ring 4 is fixed to the plate 1 by laser welding.

[0079] In one embodiment, such as Figure 2 As shown, a protective film 9 is also included, which covers the mounting hole 103.

[0080] In this embodiment, the protective film 9 is attached to the plate 1 above the explosion-proof valve 8 and seals the mounting hole 103. The function of the protective film 9 is to prevent foreign objects from contaminating the explosion-proof valve 8 or external forces from impacting it.

[0081] Specifically, the protective film 9 is made of high-molecular polyester material, which has the functions of preventing scratches and wear, dust and pollution, chemical corrosion and oxidation, and static electricity.

[0082] In one embodiment, such as Figure 2 As shown, the bottom of the groove 701 has multiple vent holes 703.

[0083] In this embodiment, for releasing the heat generated in the battery, the explosion-proof valve 8 is located between the plate 1 and the insulating plate 7 and respectively blocks the mounting hole 103 and the groove 701. The groove 701 has a buffer space, and the heat generated by the battery can be accumulated in the groove 701. The space in the groove 701 can buffer the gas, and under normal battery operation, it can prevent the gas from causing excessive pressure on the explosion-proof valve 8.

[0084] In one embodiment, the connecting plate 201 has at least one notch on its periphery, and the notch communicates with the first gap 5.

[0085] In this embodiment, during the glue injection process in the glue injection device, the insulating glue is injected into the notch from the first gap 5, which has an obstructive effect on the rotation of the pole post 2 along its axial direction, and can prevent the pole post 2 from rotating along its axial direction, thereby positioning the pole post 2 in the rotation direction.

[0086] In some embodiments, the notch is set as a fan-shaped notch with an opening angle of 10 degrees. After the pole post 2 is coated with rubber, the torque is greater and the connection with the fixing ring 4 is more secure.

[0087] In some embodiments, the connecting plate 201 has three notches on its periphery, and the three notches are spaced at equal angles to improve the stability of the pole post 2 on the rotation surface perpendicular to its axis.

[0088] According to an embodiment of this application, another aspect provides a method for manufacturing a battery cover assembly, applied to a battery cover assembly, such as... Figure 7 As shown, the manufacturing method includes:

[0089] S1, the sealing ring 3 is fitted onto the positioning section 203.

[0090] S2, the sealing ring 3 is placed inside the positioning hole 102 and is interference-fitted with the positioning hole 102.

[0091] S3, fix the fixing ring 4 in the positioning groove 101, and the inner hole 401 of the fixing ring 4 is coaxial with the positioning hole 102.

[0092] S4, the plate 1 is placed in the glue injection device, and the glue injection device injects glue into the first gap 5 to form the battery cover assembly.

[0093] A sealing ring 3 is fitted onto the positioning section 203 of the pole post 2, and then the positioning section 203 of the pole post 2 passes through the positioning hole 102, so that the sealing ring 3 is located between the positioning section 203 and the positioning hole 102. The sealing ring 3 and the positioning hole 102 are interference-fitted, which can position the connecting section 202 on the positioning hole 102 and can insulate the pole post 2 from the plate 1. A fixing ring 4 is fixed on the positioning groove 101. The inner hole 401 of the fixing ring 4 is coaxial with the positioning hole 102. Specifically, the fixing ring 4 can be fixed on the positioning groove 101 by welding, that is, the fixing ring 4 is fixed on the plate 1. While the connecting section 202 of the pole post 2 passes through the inner hole 401 of the fixing ring 4, a first gap 5 is formed between the inner hole 401 of the fixing ring 4 and the connecting plate 201. The plate is placed in the glue injection device, which presses the pole 2 downward along the axis, causing the connecting plate 201 to press the abutment part 301. The abutment part 301 is flexible and can be compressed, forming a second gap 6 between the connecting plate 201 and the abutment plate 402. The second gap 6 is connected to the first gap 5. Therefore, during glue injection, the insulating glue can fill the first gap 5 and the second gap 6, fixing the pole 2 and the fixing ring 4 together. The insulating glue has an insulating function, and through the insulating glue and the sealing ring 3, the pole 2 is insulated from the plate 1 and the fixing ring 4.

[0094] Thirdly, this application also provides a battery, including: a battery cover assembly.

[0095] It should be noted that the battery includes the battery cover assembly provided in the embodiments of this application, and therefore includes all the advantages of the battery cover assembly mentioned above, so it will not be described again.

[0096] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended application.

Claims

1. A battery cover plate assembly, characterized by, include: The plate (1) is provided with a positioning groove (101), and the bottom of the positioning groove (101) is provided with a positioning hole (102) that passes through the plate (1). A pole post (2) has a connecting plate (201) extending radially from its periphery. The connecting plate (201) divides the pole post (2) into a connecting section (202) and a positioning section (203). The positioning section (203) is connected through the positioning hole (102). A sealing ring (3) is fitted onto the positioning section (203), and the sealing ring (3) is interference-fitted with the positioning hole (102); A fixing ring (4) is disposed in the positioning groove (101). The fixing ring (4) has an inner hole (401). The connecting section (202) passes through the inner hole (401) of the fixing ring (4). A first gap (5) is provided between the connecting plate (201) and the inner hole (401). Insulating glue is provided in the first gap (5). An abutment plate (402) extends radially from one end face of the fixing ring (4) away from the positioning groove (101) toward the inner hole (401). A second gap (6) is provided between the abutment plate (402) and the connecting plate (201). The first gap (5) communicates with the second gap (6). The insulating adhesive is provided in the second gap (6).

2. The battery cover plate assembly of claim 1, wherein, The sealing ring (3) extends radially from the end face of the connecting plate (201) to form an abutment portion (301), and the two sides of the abutment portion (301) abut against the bottom of the connecting plate (201) and the positioning groove (101) respectively.

3. The battery cover plate assembly of claim 1, wherein, The fixing ring (4) extends a positioning plate (403) radially away from the inner hole (401) from one end face away from the abutment plate (402), and the positioning plate (403) is fixedly connected to the positioning groove (101).

4. The battery cover assembly according to claim 3, characterized in that, The fixing ring (4) has a through hole (404) that runs through it radially, and one end of the through hole (404) is connected to the first gap (5).

5. The battery cover plate assembly of claim 2, wherein, The longitudinal section of the sealing ring (3) is L-shaped, and the longitudinal section of the sealing ring (3) is parallel to the axial direction of the pole post (2).

6. The battery cover plate assembly of claim 3, wherein, The fixing ring (4) is provided with reinforcing ribs on its periphery, and the positioning plate (403) and the reinforcing ribs are spaced apart along the axial direction of the fixing ring (4).

7. The battery cover plate assembly of claim 3, wherein, The positioning groove (101), the positioning hole (102), the pole post (2), the inner hole (401), the fixing ring (4), and the positioning plate (403) are coaxially arranged.

8. The battery cover plate assembly of claim 1, wherein, It also includes an insulating plate (7), one side of which is adapted to be disposed at one end of the battery, and the other side of which is disposed on the plate body (1) and located between the battery and the plate body (1).

9. The battery cover plate assembly of claim 8, wherein, The insulating plate (7) has a groove (701) and the plate body (1) has a mounting hole (103) corresponding to the groove (701). The insulating plate (7) has a through hole (702) and the through hole (702) corresponds to the positioning hole (102). It also includes an explosion-proof valve (8), which is installed on the plate (1) and located between the plate (1) and the insulating plate (7). The explosion-proof valve (8) blocks the mounting hole (103) and the groove (701).

10. The battery cover plate assembly of claim 9, wherein, It also includes a protective film (9) which covers the mounting hole (103).

11. The battery cover plate assembly of claim 9, wherein, The bottom of the groove (701) is provided with multiple ventilation holes (703).

12. The battery cover plate assembly of any one of claims 1 to 11, wherein, The connecting plate (201) has at least one notch on its periphery, and the notch communicates with the first gap (5).

13. A method of making a battery cover plate assembly, the method comprising: The method of manufacturing the battery cover assembly according to any one of claims 1 to 12 includes: S1, Place the sealing ring on the positioning section; S2, The sealing ring is placed inside the positioning hole and is interference-fitted with the positioning hole; S3, fix the retaining ring in the positioning groove, and set the inner hole of the retaining ring and the positioning hole coaxially; S4, the board is placed in the glue injection device, and the glue injection device injects glue into the first gap.

14. A battery, characterized by include: The battery cover assembly according to any one of claims 1 to 12.

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