Pole assembly, battery top cover and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a pole assembly, a battery top cover and a battery, the pole assembly comprises a pole, a first insulating part and a pole bolt, the first insulating part is provided with a pole via hole penetrating through the first insulating part along the thickness direction of the first insulating part, the pole penetrates through the pole via hole, and the pole bolt is inserted into the pole via hole. An insertion hole is formed in the pole in the radial direction of the pole, the pole bolt is inserted into the insertion hole to abut against the pole, and the free end of the pole bolt extends towards the outer side of the pole and abuts against the first insulating part. According to the pole assembly provided by the utility model, the pole bolt is inserted into the pole and the first insulating piece and is propped against the pole and the first insulating piece, so that the pole collapse risk caused by high temperature in the battery manufacturing and / or using process is reduced, the exposed area of the pole bolt is increased, the heat dissipation area of the exposed part of the pole is increased, and the heat dissipation efficiency of the battery is improved. Therefore, the high temperature of the pole is reduced, the pole is further prevented from collapsing in the manufacturing and / or using process of the battery, and the safety of the battery is effectively improved.

Description

Technical Field

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

[0002] Currently, with the continuous development of energy storage, lithium-ion batteries have been widely used due to their high capacity and other excellent characteristics. The main structural components of a lithium-ion battery include an aluminum casing and a top cover. The aluminum casing has an opening, and the top cover seals the opening of the aluminum casing, forming a closed energy storage system. Within this closed system are corresponding energy storage structures and materials.

[0003] The existing top cover structure mainly includes a top cover plate, an upper plastic, an electrode post, a lower plastic, and a sealing ring. The electrode post is fixed to the top cover plate by injection molding of the upper plastic, the lower plastic is installed between the electrode post and the top cover plate, and the sealing ring is used to compress and seal the electrode post and the top cover plate to prevent leakage.

[0004] The assembly structure of the electrode post and the upper plastic is as follows: A through-hole is provided on the upper plastic along its thickness direction, through which the electrode post passes. A groove is provided on the outer wall of the electrode post, and a protrusion matching the groove is provided on the inner wall of the through-hole. The protrusion is embedded in the groove, achieving a fixed connection between the electrode post and the upper plastic. However, the protrusion in the groove of the upper plastic embedded in the electrode post will soften and deform under the high temperature of the electrode post during battery manufacturing and / or use. The softened upper plastic will cause the electrode post to collapse downwards along its axial direction when the sealing ring releases its compressive force, leading to instability in the top cover structure and affecting the safety performance of the lithium-ion battery. Utility Model Content

[0005] To address the risk of terminal collapse caused by high temperatures during battery manufacturing and / or use in the existing top cover structure, this invention provides a terminal assembly, a battery top cover, and a battery. By providing a terminal pin that can be inserted into and abuts against the terminal and the first insulating component, the problem of terminal collapse during battery manufacturing and / or use is solved, while also increasing the heat dissipation area of ​​the exposed portion of the terminal, thereby improving battery safety.

[0006] The technical effects to be achieved by this utility model are realized through the following technical aspects:

[0007] In a first aspect, the present invention provides a pole assembly, comprising: a pole, a first insulating member, and a pole pin. A pole through hole is provided on the first insulating member along the thickness direction of the first insulating member, the pole passing through the pole through hole. An insertion hole is provided on the pole along the radial direction of the pole, the pole pin is inserted into the insertion hole and abuts against the pole, and the free end of the pole pin extends outward from the pole and abuts against the first insulating member.

[0008] In some alternative implementations, the first insulating member is provided with a slot, the slot is connected to the socket, the free end of the pole pin is embedded in the slot, and the free end of the pole pin abuts against the bottom and wall of the slot.

[0009] In some alternative implementations, the free end of the pole pin is bent toward the first insulating member to form a limiting block. The first insulating member has a limiting groove, and the limiting block is inserted into the limiting groove, with the limiting block abutting against the bottom and wall of the limiting groove.

[0010] In some alternative implementations, the pole pin is a plate-like structure, and the free end of the pole pin extends along the length direction of the pole pin.

[0011] In some alternative implementations, the thickness of the limiting block is less than the thickness of the pole pin.

[0012] In some alternative implementations, a groove is provided on the outer side wall of the pole post, and a first protrusion matching the groove is provided on the inner side wall of the pole post through hole, the first protrusion being embedded in the groove.

[0013] In some alternative implementations, the through hole is offset from the groove in the axial direction of the pole post.

[0014] In some alternative implementations, the upper surface and / or end face of the free end of the pole pin are not covered by the first insulating element.

[0015] In some alternative implementations, the insertion hole is a through hole that passes through the pole post, the pole post pin passes through the through hole and abuts against the pole post, and both ends of the pole post pin can form free ends of the pole post pin.

[0016] In some alternative implementations, a cross-section is taken along the radial direction of the insertion hole, and the cross-sectional shape of the pole pin matches the cross-sectional shape of the through hole.

[0017] Secondly, this utility model provides a battery top cover, including a top cover plate, a second insulating member, and the aforementioned terminal assembly. A first terminal mounting hole penetrating the top cover plate is provided along the thickness direction of the top cover plate, and a second terminal mounting hole penetrating the second insulating member is provided along the thickness direction of the second insulating member. The terminal passes through the second terminal mounting hole and the first terminal mounting hole in sequence and is insulatedly connected to the top cover plate through the first insulating member.

[0018] In some alternative implementations, a sealing ring is also included, which is fitted onto the pole post and compressed and adhered between the top cover plate and the pole post.

[0019] Thirdly, this utility model provides a battery, including a battery casing and the aforementioned battery top cover. The battery casing has an electrode assembly inside, and the battery casing has an opening, which is sealed by the battery top cover.

[0020] In summary, this utility model has at least the following advantages:

[0021] 1. The terminal assembly provided by this utility model, by setting a terminal pin to be inserted into the terminal and abutting against the terminal and the first insulating member, allows the first insulating member to support the terminal pin, and the terminal pin to support the terminal, thereby reducing the risk of terminal collapse caused by high temperature during battery manufacturing and / or use. Furthermore, the upper surface and / or end face of the free end of the terminal pin are not covered by the first insulating member, increasing the exposed area of ​​the terminal pin and the heat dissipation area of ​​the exposed part of the terminal, thereby reducing the high temperature of the terminal and further preventing the terminal from collapsing during battery manufacturing and / or use, effectively improving battery safety.

[0022] 2. The battery top cover provided by this utility model adopts the above-mentioned terminal post assembly, which solves the risk of terminal post collapse caused by high temperature during battery manufacturing and / or use, while increasing the heat dissipation area of ​​the exposed part of the terminal post, reducing the high temperature of the terminal post, further preventing the terminal post from collapsing during battery manufacturing and / or use, and effectively improving the safety of the battery.

[0023] 3. The battery provided by this utility model adopts the above-mentioned battery top cover, which reduces the risk of terminal collapse caused by high temperature during battery manufacturing and / or use, and improves the safety and service life of the battery. Attached Figure Description

[0024] Figure 1 An exploded view of a pole assembly provided in an embodiment of this utility model.

[0025] Figure 2This is a schematic diagram of the structure of a pole assembly provided in an embodiment of the present utility model.

[0026] Figure 3 for Figure 2 Sectional view of plane AA.

[0027] Figure 4 An exploded view of a battery top cover provided for an embodiment of this utility model.

[0028] Figure 5 This is an exploded view of a battery top cover from another angle, provided as an embodiment of the present invention.

[0029] Figure 6 This is a schematic diagram of the structure of a battery top cover provided in an embodiment of the present utility model.

[0030] Figure 7 for Figure 6 BB section view.

[0031] Figure 8 for Figure 7 Enlarged view of part A.

[0032] Marked in the image:

[0033] 1. Pole post;

[0034] 11. Insertion hole; 12. Groove; 13. Column; 14. Base plate;

[0035] 2. First insulating component;

[0036] 21. Through hole for pole post; 22. Slot; 23. Limiting groove; 24. First protrusion; 25. Second protrusion;

[0037] 3. Pole post pin;

[0038] 31. Limit block;

[0039] 4. Top cover plate;

[0040] 41. First pole post mounting hole; 42. First recessed groove; 43. Explosion-proof valve mounting hole;

[0041] 5. Second insulating component;

[0042] 51. Second pole post mounting hole; 52. Protrusion; 53. Second recessed groove;

[0043] 6. Sealing ring;

[0044] 7. Explosion-proof valve patch;

[0045] 8. Explosion-proof valve. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0047] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0048] Example 1:

[0049] To address the risk of terminal collapse caused by high temperatures during battery manufacturing and / or use in existing top cover structures, this embodiment provides a terminal assembly, a battery top cover, and a battery. By providing a terminal pin that can be inserted into and abuts against the terminal and the first insulating component, the problem of terminal collapse during battery manufacturing and / or use is solved, while also increasing the heat dissipation area of ​​the exposed portion of the terminal, thereby improving battery safety.

[0050] Please see Figures 1-3 The present embodiment discloses an electrode assembly, including: an electrode 1, a first insulating member 2, and an electrode pin 3. An electrode through hole 21 is provided on the first insulating member 2 along the thickness direction of the first insulating member 2, through the electrode 1. The electrode 1 passes through the electrode through hole 21. An insertion hole 11 is provided on the electrode 1 along the radial direction of the electrode 1. The electrode pin 3 is inserted into the insertion hole 11 and abuts against the electrode 1. The free end of the electrode pin 3 extends outward from the electrode 1 and abuts against the first insulating member 2.

[0051] The terminal assembly provided in this embodiment, by setting the terminal pin 3 to be inserted into the terminal 1 and the first insulating member 2 and abutting against the terminal 1 and the first insulating member 2, when the high temperature of the terminal 1 during battery manufacturing and / or use causes the first protrusion 24 of the first insulating member 2 to soften and deform, the terminal pin 3 can be kept fixed by the support of the remaining part of the first insulating member 2, thereby preventing the terminal 1 from collapsing. In addition, by ensuring that the upper surface and / or end face of the free end of the terminal pin 3 is not covered by the first insulating member 2, the exposed area of ​​the terminal pin 3 is increased, and the heat dissipation area of ​​the exposed part of the terminal 1 is increased, thereby reducing the high temperature of the terminal 1 and further preventing the terminal 1 from collapsing during battery manufacturing and / or use, effectively improving the safety of the battery.

[0052] In this preferred embodiment, the electrode post 1 passes through the electrode post through hole 21 and extends out of the first insulating member 2. That is, after the electrode post 1 passes through the electrode post through hole 21, its top extends out of the upper surface of the first insulating member 2 so that the battery can be connected to the power device or other batteries.

[0053] In addition, in this embodiment, it should be noted that the free end of the pole pin 3 is defined as follows: a part of the pole pin 3 is inserted into the socket 11 and abuts against the pole 1, and the end of the pole pin 3 away from the pole 1 forms the free end of the pole pin 3.

[0054] While the free end of the pole pin 3 abuts against the first insulating member 2, the upper surface and / or end face of the free end of the pole pin 3 are not covered by the first insulating member 2.

[0055] The upper surface of the free end of the pole pin 3 is not covered by the first insulating member 2, allowing the free end of the pole pin 3 to abut against the upper surface of the first insulating member 2. The end face of the free end of the pole pin 3 is not covered by the first insulating member 2, allowing the end face of the free end of the pole pin 3 to extend to the outside of the first insulating member 2.

[0056] In this embodiment, the fixed connection structure between the pole post 1 and the first insulating member 2 is as follows: a groove 12 is provided on the outer side wall of the pole post 1, and a first protrusion 24 matching the groove 12 is provided on the inner side wall of the pole post through hole 21. The first protrusion 24 is embedded in the groove 12.

[0057] Preferably, the first insulating member 2 is a plastic part, which is formed by injection molding to fix it to the pole post 1.

[0058] The groove 12 is an annular groove provided around the outer side wall of the pole post 1, and the first protrusion 24 is an annular protrusion provided around the inner side wall of the pole post through hole 21. The annular protrusion is embedded in the annular groove so that the connection between the pole post 1 and the first insulating member 2 is more secure.

[0059] In this preferred embodiment, the insertion hole 11 is offset from the groove 12 in the axial direction of the pole post 1, which can prevent the pole post pin 3 from passing through the first protrusion 24. Even if the first protrusion 24 softens and deforms under the high temperature of the pole post 1, the pole post pin 3 can still be fixed by the support of the rest of the first insulating member 2, preventing the pole post 1 from collapsing during battery manufacturing and / or use, thereby making the connection between the pole post 1 and the first insulating member 2 more secure.

[0060] As a further preferred embodiment, the insertion hole 11 is located above the groove 12, so that more of the first insulating member 2 can support the pole pin 3 below the pole pin 3.

[0061] In this embodiment, the pole pin 3 can be made of a metal material with high structural strength, such as steel.

[0062] In this embodiment, the insertion hole 11 is a through hole penetrating the terminal post 1. The terminal post pin 3 passes through the through hole and abuts against the terminal post 1. Both ends of the terminal post pin 3 can form free ends. The terminal post pin 3 can be inserted from either side of the terminal post 1 and abut against the terminal post 1 through the through hole. Both ends of the terminal post pin 3 extend outwards from the terminal post 1 and abut against the first insulating member 2, so that the first insulating member 2 can better support the terminal post pin 3. The terminal post pin 3 can better support the terminal post 1, further preventing the terminal post 1 from collapsing during battery manufacturing and / or use.

[0063] Preferably, the cross-section of the terminal pin 3 is made along the radial direction of the insertion hole 11, and the cross-sectional shape of the terminal pin 3 matches the cross-sectional shape of the insertion hole 11, so that the terminal pin 3 fits against the terminal 1 after being inserted into the insertion hole 11, thereby allowing the terminal pin 3 to better support the terminal 1 and further preventing the terminal 1 from collapsing during battery manufacturing and / or use.

[0064] In some optional embodiments, the cross-sectional shape of the socket 11 may be circular, square, trapezoidal, etc., and the cross-sectional shape of the pole pin 3 matches the cross-sectional shape of the socket 11.

[0065] To maximize the exposed area of ​​the pole pin 3, the optimal cross-sectional shape of the socket 11 is square or trapezoidal. Similarly, the optimal cross-sectional shape of the pole pin 3 is square or trapezoidal.

[0066] In addition, in this embodiment, in order to better limit and fix the pole pin 3, a slot 22 is provided on the first insulating member 2. The slot 22 is connected to the insertion hole 11. The free end of the pole pin 3 is embedded in the slot 22. The free end of the pole pin 3 abuts against the bottom and wall of the slot 22, thereby preventing the pole pin 3 from rotating in the circumferential direction of the pole 1.

[0067] Preferably, the slot 22 is disposed on the upper surface of the first insulating member 2 and is arranged radially along the pole post through hole 21. The pole post pin 3 can be inserted into the slot 22 and the insertion hole 11 radially along the pole post 1. At this time, the upper surface and end face of the free end of the pole post pin 3 are not covered by the first insulating member 2, thereby increasing the exposed area of ​​the pole post pin 3.

[0068] Preferably, the slot 22 is disposed on the upper surface of the first insulating member 2 and is disposed on opposite sides of the pole through hole 21 along the radial direction of the pole 1. The pole pin 3 can be inserted into the slot 22 and the insertion hole 11 from either side of the pole 1 along the radial direction of the pole 1. At this time, the upper surface and end face of the opposite ends of the pole pin 3 are not covered by the first insulating member 2, thereby increasing the exposed area of ​​the pole pin 3.

[0069] In some optional embodiments, the slot 22 is disposed in the first insulating member 2 and arranged radially along the pole post through hole 21. The pole post pin 3 can be inserted into the slot 22 and the insertion hole 11 radially along the pole post 1. At this time, the end face of the free end of the pole post pin 3 is not covered by the first insulating member 2, thereby increasing the exposed area of ​​the pole post pin 3.

[0070] Preferably, the slot 22 is disposed in the first insulating member 2 and is disposed on opposite sides of the pole through hole 21 along the radial direction of the pole through hole 21. The pole pin 3 can be inserted into the slot 22 and the insertion hole 11 from either side of the pole 1 along the radial direction of the pole 1. At this time, the end faces of both ends of the pole pin 3 are not covered by the first insulating member 2, thereby increasing the exposed area of ​​the pole pin 3.

[0071] In this preferred embodiment, a cross-section is taken along the radial direction of the slot 22, and the cross-sectional shape of the free end of the pole pin 3 matches the cross-sectional shape of the slot 22, thereby better preventing the pole pin 3 from rotating in the circumferential direction of the pole 1.

[0072] Preferably, the cross-sectional shape of the slot 22 can be circular, square, trapezoidal, etc., and the cross-sectional shape of the free end of the pole pin 3 matches the cross-sectional shape of the slot 22.

[0073] To maximize the exposed area of ​​the pole pin 3, the optimal cross-sectional shape of the slot 22 is square or trapezoidal. Similarly, the optimal cross-sectional shape of the free end of the pole pin 3 is square or trapezoidal.

[0074] In this embodiment, the fixing structure between the pole pin 3 and the pole 1 and / or the first insulating member 2 is as follows: after the pole pin 3 is inserted into the socket 11, the part of the pole pin 3 inserted into the socket 11 is fixed by through welding to the pole 1, thereby preventing the pole pin 3 from shifting in the radial direction of the pole 1.

[0075] In some optional embodiments, the free end of the pole pin 3 is bent toward the first insulating member 2 to form a limiting block 31. The first insulating member 2 is provided with a limiting groove 23. The limiting block 31 is inserted into the limiting groove 23. The limiting block 31 abuts against the bottom and wall of the limiting groove 23, thereby preventing the pole pin 3 from rotating in the circumferential direction of the pole 1, and also preventing the pole pin 3 from moving in the radial direction of the pole 1 along the insertion hole 11.

[0076] In some optional embodiments, the limiting groove 23 is formed at the end of the first insulating member 2 away from the pole post 1, the limiting block 31 is inserted into the limiting groove 23, the limiting block 31 abuts against the bottom and wall of the limiting groove 23, the end face of the free end of the pole post pin 3 is not covered by the first insulating member 2, thereby increasing the exposed area of ​​the pole post pin 3 and further increasing the heat dissipation area of ​​the exposed part of the pole post 1.

[0077] Preferably, the limiting groove 23 is formed at the opposite ends of the first insulating member 2 away from the pole post 1. The two ends of the pole post pin 3 are bent towards the first insulating member 2 to form limiting blocks 31. The limiting blocks 31 are inserted into the limiting groove 23 and abut against the bottom and wall of the limiting groove 23. This prevents the pole post pin 3 from rotating in the circumferential direction of the pole post 1, and also prevents the pole post pin 3 from moving in the radial direction of the insertion hole 11 along the pole post 1.

[0078] In this embodiment, by simultaneously providing slot 22 and limiting groove 23, and setting the limiting groove 23 at both ends of slot 22 away from pole post 1, the stability of pole post pin 3 installation is further ensured.

[0079] In this preferred embodiment, a cross section is made along the radial direction of the limiting groove 23. The cross-sectional shape of the limiting block 31 matches the cross-sectional shape of the limiting groove 23, thereby better preventing the pole pin 3 from rotating in the circumferential direction of the pole 1, and also better preventing the pole pin 3 from moving in the radial direction of the insertion hole 11 along the pole 1.

[0080] Preferably, the cross-sectional shape of the limiting groove 23 can be square, trapezoidal, etc., and the cross-sectional shape of the limiting block 31 matches the cross-sectional shape of the limiting groove 23.

[0081] To maximize the exposed area of ​​the pole pin 3, the optimal cross-sectional shape of the limiting groove 23 is square or trapezoidal. Similarly, the optimal cross-sectional shape of the limiting block 31 is square or trapezoidal, so as to maximize the exposed area of ​​the pole pin 3, further increase the heat dissipation area of ​​the exposed part of the pole 1, and achieve better heat dissipation effect.

[0082] In some optional embodiments, the pole pin 3 has a plate-like structure, with its free end extending along its length. This allows for the application of less force to the free end of the pole pin 3, causing it to bend closer to the first insulating member 2 to form a limiting block 31. The thickness of the limiting block 31 is less than the thickness of the pole pin 3, which improves the strength of the pole pin 3 and better supports the pole 1. Furthermore, the smaller thickness of the limiting block 31 allows for the application of less force to the free end of the pole pin 3, causing it to bend closer to the first insulating member 2 to form the limiting block 31.

[0083] In some optional embodiments, the assembly structure between the pole pin 3, the first insulating member 2, and the pole 1 is as follows: first, a socket hole 11 is provided on the pole 1 along the radial direction of the pole 1; then, the first insulating member 2 is formed by injection molding and fixed to the pole 1; a pole through hole 21 is formed on the first insulating member 2 along the thickness direction of the first insulating member 2; a slot 22 is reserved on the upper surface of the first insulating member 2 along the radial direction of the pole through hole 21; and a limiting groove 23 is reserved at the opposite ends of the first insulating member 2 away from the pole 1. The pole pin 3 is inserted into the socket hole 11 of the pole 1 for fixation; the two ends of the pole pin 3 are embedded in the slot 22; then, pressure is applied to the two ends of the pole pin 3 to bend it and form a limiting block 31; the limiting block 31 is inserted into the limiting groove 23. This increases the exposed area of ​​the pole pin 3 and prevents the pole pin 3 from shifting radially in the pole 1.

[0084] In some alternative embodiments, the assembly structure between the pole pin 3, the first insulating member 2, and the pole 1 is as follows: first, a socket 11 is provided on the pole 1 along the radial direction of the pole 1; the pole pin 3 is inserted into the socket 11 of the pole 1 for fixation before the first insulating member 2 is injection molded; then, pressure is applied to the opposite ends of the pole pin 3 to bend it and form a limiting block 31; finally, the first insulating member 2 is formed by injection molding, and a slot 22 is formed under the action of the pole pin 3; and a limiting groove 23 is formed under the action of the limiting block 31. This increases the exposed area of ​​the pole pin 3 and prevents the pole pin 3 from shifting radially in the pole 1.

[0085] Example 2:

[0086] This embodiment provides a battery top cover; please refer to [link / reference]. Figures 4-8 This embodiment discloses a battery top cover, including: a top cover plate 4, a second insulating member 5, a sealing ring 6, and the terminal assembly described in Embodiment 1 above. A first terminal mounting hole 41 is provided on the top cover plate 4 along the thickness direction of the top cover plate 4, and a second terminal mounting hole 51 is provided on the second insulating member 5 along the thickness direction of the second insulating member 5. The terminal 1 passes through the second terminal mounting hole 51 and the first terminal mounting hole 41 in sequence and is insulatedly connected to the top cover plate 4 through the first insulating member 2. The sealing ring 6 is sleeved on the terminal 1, and the sealing ring 6 is compressed and adhered between the lower surface of the top cover plate 4 and the terminal 1 to achieve a seal between the top cover plate 4 and the terminal 1, thereby preventing electrolyte leakage between the top cover plate 4 and the terminal 1.

[0087] Specifically, after the pole post 1 passes through the second pole post mounting hole 51, the sealing ring 6, and the first pole post mounting hole 41 in sequence, it is insulated and connected to the top cover plate 4 through the first insulating component 2.

[0088] In some alternative embodiments, the mounting structure between the first insulating member 2 and the top cover plate 4, the second insulating member 5 and the top cover plate 4, and the pole post 1 and the second insulating member 5 has been optimized.

[0089] Specifically, the mounting structure between the first insulating element 2 and the top cover plate 4 is as follows:

[0090] A second protrusion 25 extends from the lower surface of the first insulating member 2 around the pole through hole 21 toward the first pole mounting hole 41. The second protrusion 25 is embedded in the first pole mounting hole 41 and abuts against the inner wall of the first pole mounting hole 41, thereby preventing the first insulating member 2 from moving radially in the pole through hole 21.

[0091] In addition, multiple limiting protrusions (not shown in the figure) extend from the lower surface of the first insulating member 2 toward the top cover plate 4. The multiple limiting protrusions are evenly distributed around the pole post through hole 21. Multiple limiting grooves (not shown in the figure) that match the limiting protrusions are provided on the upper surface of the top cover plate 4. The multiple limiting grooves are evenly distributed around the first pole post mounting hole 41. The limiting protrusions are embedded in the limiting grooves, thereby limiting the first insulating member 2 and preventing the first insulating member 2 from rotating in the circumferential direction of the pole post through hole 21.

[0092] The mounting structure between the second insulating component 5 and the top cover plate 4 is as follows:

[0093] A first recessed groove 42 is provided on the lower surface of the top cover plate 4, and a first terminal mounting hole 41 is located in the first recessed groove 42. A protrusion 52 is provided on the upper surface of the second insulating member 5, and a second terminal mounting hole 51 is located in the protrusion 52. The protrusion 52 can be embedded in the first recessed groove 42, thereby reducing the thickness of the battery top cover.

[0094] The mounting structure between pole post 1 and second insulating component 5 is as follows;

[0095] A second recessed groove 53 is provided on the lower surface of the second insulating member 5. The second recessed groove 53 is disposed opposite to the protrusion 52. The pole post 1 includes a column body 13 and a base plate 14. The base plate 14 is integrally formed with the bottom surface of the column body 13. The shape of the second recessed groove 53 matches that of the base plate 14. After the column body 13 passes through the second pole post mounting hole 51, the base plate 14 is embedded in the second recessed groove 53 to limit the pole post 1, thereby preventing the pole post 1 from moving upward along the axial direction of the pole post 1.

[0096] In this embodiment, two pole post assemblies are provided. The two pole post assemblies have the same structure and are symmetrically installed at both ends of the top cover plate 4. Specifically, the two pole post assemblies are a positive pole post assembly and a negative pole post assembly. Therefore, two first pole post mounting holes 41 are also provided. The two first pole post mounting holes 41 have the same structure and are symmetrically distributed at both ends of the top cover plate 4. Similarly, two second insulating members 5 are provided. The two second insulating members 5 have the same or different structures. Each second insulating member 5 is provided with a second pole post mounting hole 51, thereby realizing the installation of the two pole post assemblies.

[0097] In this embodiment, the battery top cover also includes an explosion-proof valve patch 7 and an explosion-proof valve 8. An explosion-proof valve mounting hole 43 is provided on the top cover plate 4 along the thickness direction of the top cover plate 4, penetrating the top cover plate 4. The explosion-proof valve patch 7 is installed on the upper surface of the top cover plate 4 and covers the explosion-proof valve mounting hole 43. The explosion-proof valve 8 is installed on the lower surface of the top cover plate 4 and covers the explosion-proof valve mounting hole 43.

[0098] The battery top cover provided in this embodiment adopts the terminal assembly described in Embodiment 1 above. While solving the risk of terminal 1 collapse caused by high temperature during battery manufacturing and / or use, it increases the heat dissipation area of ​​the exposed part of terminal 1, reduces the high temperature of terminal 1, and further prevents terminal 1 from collapsing during battery manufacturing and / or use, effectively improving battery safety.

[0099] Example 3:

[0100] This embodiment provides a battery, which includes a battery casing and a battery top cover as described in Embodiment 2 above. The battery casing has an electrode assembly inside and an opening on the battery casing, and the battery top cover seals the opening.

[0101] Since the battery is made using the battery top cover described in Example 2, the risk of the terminal post 1 collapsing due to high temperature during the manufacturing and / or use of the battery is reduced, effectively improving the safety of the battery.

[0102] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0103] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing 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 this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0104] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0105] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0106] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A pole assembly, characterized in that, include: The device comprises a pole (1), a first insulating member (2), and a pole pin (3). A pole through hole (21) is provided on the first insulating member (2) along the thickness direction of the first insulating member (2). The pole (1) passes through the pole through hole (21). An insertion hole (11) is provided on the pole (1) along the radial direction of the pole (1). The pole pin (3) is inserted into the insertion hole (11) and abuts against the pole (1). The free end of the pole pin (3) extends outward from the pole (1) and abuts against the first insulating member (2).

2. The pole assembly according to claim 1, characterized in that, The first insulating member (2) is provided with a slot (22), the slot (22) is connected to the socket (11), the free end of the pole pin (3) is embedded in the slot (22), and the free end of the pole pin (3) abuts against the bottom and wall of the slot (22).

3. The pole assembly according to claim 1, characterized in that, The free end of the pole pin (3) is bent toward the first insulating member (2) to form a limiting block (31). The first insulating member (2) is provided with a limiting groove (23). The limiting block (31) is inserted into the limiting groove (23). The limiting block (31) abuts against the bottom and wall of the limiting groove (23).

4. The pole assembly according to claim 3, characterized in that, The pole pin (3) has a plate-like structure, and the free end of the pole pin (3) extends along the length direction of the pole pin (3).

5. The pole assembly according to claim 4, characterized in that, The thickness of the limiting block (31) is less than the thickness of the pole pin (3).

6. The pole assembly according to claim 1, characterized in that, A groove (12) is provided on the outer side wall of the pole post (1), and a first protrusion (24) matching the groove (12) is provided on the inner side wall of the pole post through hole (21), and the first protrusion (24) is embedded in the groove (12).

7. The pole assembly according to claim 6, characterized in that, The insertion hole (11) is offset from the groove (12) in the axial direction of the pole post (1).

8. The pole assembly according to any one of claims 1-7, characterized in that, The upper surface and / or end face of the free end of the pole pin (3) are not covered by the first insulating member (2).

9. The pole assembly according to any one of claims 1-7, characterized in that, The insertion hole (11) is a through hole that passes through the pole post (1). The pole post pin (3) passes through the through hole and abuts against the pole post (1). Both ends of the pole post pin (3) can form the free ends of the pole post pin (3).

10. The pole assembly according to any one of claims 1-7, characterized in that, A cross-section is taken along the radial direction of the socket (11), and the cross-sectional shape of the pole pin (3) matches the cross-sectional shape of the socket (11).

11. A battery top cover, characterized in that, The assembly includes a top cover plate (4), a second insulating member (5), and a pole assembly as described in any one of claims 1-10. A first pole mounting hole (41) is provided on the top cover plate (4) along the thickness direction of the top cover plate (4), and a second pole mounting hole (51) is provided on the second insulating member (5) along the thickness direction of the second insulating member (5). The pole (1) passes through the second pole mounting hole (51) and the first pole mounting hole (41) in sequence and is insulatedly connected to the top cover plate (4) through the first insulating member (2).

12. The battery top cover according to claim 11, characterized in that, It also includes a sealing ring (6), which is sleeved on the pole post (1) and compressed and adhered between the top cover plate (4) and the pole post (1).

13. A battery, characterized in that, The battery includes a battery housing and a battery top cover as described in any one of claims 11-12, wherein the battery housing has an electrode assembly inside, the battery housing has an opening, and the battery top cover seals the opening.

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