Electrode terminal assembly for battery cell top cover and battery cell top cover assembly

Abstract

The utility model belongs to the technical field of energy storage devices, and particularly relates to an electrode terminal assembly for a battery cell top cover and a battery cell top cover assembly, and the battery cell top cover assembly comprises a cover plate provided with a first electrode lead-out hole and a second electrode lead-out hole, the first electrode terminal assembly is arranged on the first electrode lead-out hole of the cover plate; and the second electrode terminal assembly is arranged on the second electrode lead-out hole of the cover plate. According to the electrode terminal assembly for the battery cell top cover and the battery cell top cover assembly provided by the utility model, parts in the assembly are few, the structure of a cell cover plate assembly is simplified, the space utilization rate of a lithium cell is improved, and the energy density of the cell is further improved; and due to the reduction of parts and interfaces, failure points are effectively reduced, so that the yield of the battery cell is improved, the failure probability of the battery cell is reduced, and the reliability of a battery system is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage devices, and in particular relates to an electrode terminal assembly for a battery cell top cover, and a battery cell top cover assembly comprising the electrode terminal assembly. Background Art

[0002] New energy battery structural parts are continuously iterating, including the battery cell top cover and shell, which are the core components to protect the safety of lithium batteries. They play the role of supporting, protecting and transmitting energy. They need to have high dimensional accuracy, high surface quality, high performance requirements and other characteristics. They play the role of transmitting energy, carrying electrolyte, protecting safety, fixing and supporting batteries, etc., and according to different application environments, they have specific functions such as connectivity, shock resistance, heat dissipation, corrosion resistance, anti-interference, and anti-static.

[0003] The top cover structure of a lithium battery is complex and precise, and is responsible for energy transmission and explosion-proof and pressure relief. It is composed of more than 10 components. The existing top cover structure is mainly composed of a cover plate, positive and negative poles, a liquid injection hole, a flip plate, an explosion-proof plate (valve) and other structures. For example, the top cover assembly of a secondary battery disclosed in Chinese patent document CN109817853A has a complex and precise structure, numerous parts and interfaces, resulting in many overall failure points of the battery cell, low yield, high production cost, and short life of the top cover. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present utility model is to provide a highly integrated electrode terminal assembly for a battery cell top cover, and a battery cell top cover assembly including the electrode terminal assembly, so as to solve the technical problems that the existing top cover structure has too many components, resulting in low yield and short top cover life.

[0005] To achieve the above purpose, the solution adopted by the utility model is as follows:

[0006] In a first aspect, the utility model provides an electrode terminal assembly for a battery cell top cover, which is arranged on a cover plate having a first electrode lead-out hole and a second electrode lead-out hole, and the electrode terminal assembly for the battery cell top cover comprises:

[0007] A first insulating member and a second insulating member, wherein the first insulating member and the second insulating member respectively penetrate the first electrode lead-out hole and the second electrode lead-out hole of the cover plate and extend toward the other side of the cover plate; a first sealing member and a second sealing member are respectively disposed between the first insulating member, the second insulating member and the first electrode lead-out hole and the second electrode lead-out hole;

[0008] A first cell pole, comprising a first cell pole plate and a first cell pole liner connected to one side of the first cell pole plate, wherein the first cell pole liner comprises a riveting fixing portion and a connecting column connected to the first cell pole plate; the first cell pole is inserted into the first electrode lead-out hole on the cover plate through a first insulating member and is riveted and fixedly connected to the cover plate through the riveting fixing portion on the first cell pole liner;

[0009] The second battery cell pole comprises an integrally formed second battery cell pole plate and a second battery cell pole lining located on one side of the battery cell pole plate, wherein the second battery cell pole lining comprises a riveted fixing portion; the second battery cell pole is inserted into the second electrode lead-out hole on the cover plate through a second insulating member and is riveted and fixedly connected to the cover plate through the riveted fixing portion on the second battery cell pole lining.

[0010] Preferably, the insulating member is made of plastic and is integrally injection-molded on the first electrode lead-out hole of the cover plate.

[0011] Preferably, the material of the battery cell pole is selected from any one of silver, copper, gold, aluminum, nickel and iron, preferably aluminum.

[0012] Preferably, the first insulating member and the second insulating member respectively include a base and a boss located on the base, the base is clamped on one side of the cover plate, the boss passes through the first or second electrode lead-out hole of the cover plate and extends toward the other side of the cover plate, the base and the boss have a penetrating step hole, and the large-size hole of the step hole is located on one side of the boss.

[0013] In a second aspect, the utility model also provides a battery cell top cover assembly, comprising a cover plate provided with a first electrode lead-out hole and a second electrode lead-out hole, and also comprising an electrode terminal assembly for a battery cell top cover as described above installed in the first electrode lead-out hole and the second electrode lead-out hole of the cover plate.

[0014] Preferably, a pressure relief hole and a liquid injection hole are further provided on the cover plate, and the liquid injection hole is located beside the pressure relief hole.

[0015] Preferably, it also includes a pressure relief member installed in the pressure relief hole, which is used to release the pressure inside the battery when the internal pressure or temperature of the battery reaches a threshold value; the pressure relief member includes an explosion-proof plate covering the pressure relief hole of the cover plate and a dust cover plate covering the explosion-proof plate.

[0016] Preferably, it also includes a core positioning block, which is located on the side of the cover plate facing the core, and the top of the battery core rests on the core positioning block; the core positioning block is three plastic parts, which are respectively arranged on one side of the first electrode lead-out hole, one side of the second electrode lead-out hole and at the pressure relief hole, and are integrally injection-molded on the cover plate with the insulating part in the electrode terminal assembly for the battery cell top cover.

[0017] Beneficial Effects

[0018] The utility model provides an electrode terminal assembly for a battery cell top cover and a battery cell top cover assembly, wherein the assembly has fewer parts, simplifies the structure of the cell cover assembly, improves the space utilization of the lithium battery cell, and further improves the energy density of the battery cell; due to the reduction in parts and interfaces, the failure points are effectively reduced, thereby improving the yield rate of the battery cell, reducing the probability of battery cell failure, and ensuring the reliability of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the battery cell top cover assembly involved in the utility model.

[0020] Figure 2 It is a schematic diagram of the three-dimensional disassembled structure of the battery cell top cover assembly involved in the utility model.

[0021] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the back side of the assembled battery cell top cover assembly before riveting.

[0022] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the back side of the assembled battery cell top cover assembly after riveting.

[0023] Figure 5 for Figure 1 Schematic diagram of the planar structure of the back side of the assembled battery cell top cover assembly before riveting.

[0024] Figure 6 for Figure 1 Schematic diagram of the planar structure of the back side of the assembled battery cell top cover assembly after riveting.

[0025] Figure 7 It is a cross-sectional view of a single electrode of the battery cell top cover assembly involved in the utility model after assembly.

[0026] Figure 8 The utility model is a schematic diagram of the structure of the cover plate in the battery cell top cover assembly.

[0027] Fig. 9The utility model is a schematic structural diagram of a first insulating member and a second insulating member in a battery cell top cover assembly.

[0028] Fig.10 It is a structural schematic diagram of a first sealing member and a second sealing member in a battery cell top cover assembly involved in the utility model.

[0029] Fig.11 It is a structural schematic diagram of the first battery cell pole in the battery cell top cover assembly involved in the utility model.

[0030] Fig.12 It is a structural schematic diagram of the second battery cell pole in the battery cell top cover assembly involved in the utility model.

[0031] Fig.13 The utility model is a schematic structural diagram of the explosion-proof plate of the battery cell top cover assembly.

[0032] Fig.14 The utility model is a schematic structural diagram of a dustproof cover plate of a battery cell top cover assembly.

[0033] In the figure,

[0034] 2-cover plate, 21-first electrode lead-out hole, 22-second electrode lead-out hole, 23-pressure relief hole, 24-liquid injection hole,

[0035] 1-first electrode terminal assembly, 11-first insulating member, 111-first base, 112-first boss, 113-first step hole, 12-first cell pole, 121-first cell pole plate, 122-first cell pole lining, 122a-first riveting fixing portion, 13-first sealing member,

[0036] 3-second electrode terminal assembly, 31-second insulating member, 311-second base, 312-second boss, 313-second step hole, 32-second cell pole, 321-second cell pole plate, 322-second cell pole lining, 322a-second riveting fixing portion, 33-second sealing member,

[0037] 4-pressure relief piece, 41-explosion-proof disk, 42-dust cover,

[0038] 5- Core positioning block. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] 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 present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] To this end, the following solutions are proposed:

[0046] <Battery cell top cover assembly>

[0047] See also Figure 1 , Figure 2 The utility model provides a battery cell top cover assembly, including a cover plate 2, on which a first electrode lead-out hole 21 and a second electrode lead-out hole 22 are provided, and also includes a first electrode terminal assembly 1 installed in the first electrode lead-out hole 21 of the cover plate 2 and a second electrode terminal assembly 3 installed in the second electrode lead-out hole 22 of the cover plate 2.

[0048] Specifically, in the battery cell top cover assembly provided by the present invention, the first electrode terminal assembly 1 (i.e., the negative electrode terminal assembly) is arranged on the first electrode lead-out hole 21 of the cover plate 2, wherein the first electrode terminal assembly 1 includes: a first insulating member 11, a first battery cell pole 12 and a first sealing member 13.

[0049] Furthermore, combined with Figure 1 , Figure 2 , Figure 7 and Fig. 9 As shown, in the battery cell top cover assembly provided by the utility model, in the first electrode terminal assembly 1, the first insulating member 11 is made of plastic material, integrally injection-molded on the first electrode lead-out hole 21 of the cover plate 2, and includes a first base 111 and a first boss 112 located on the first base 111, and the first base 111 is clamped on one side of the cover plate 2 (i.e. Figure 1 and Figure 2 The first boss 112 passes through the first electrode lead-out hole 21 of the cover plate 2 and extends to the other side of the cover plate 2 (i.e. Figure 1 and Figure 2 The first base 111 and the first boss 112 have a first step hole 113 that penetrates through them. The large-sized hole of the first step hole 113 is located on one side of the first boss 112.

[0050] Combination Figure 1 , Figure 2 , Figure 7 and Fig.11 As shown, in the battery cell top cover assembly provided by the utility model, in the first electrode terminal assembly 1, the first cell pole 12 includes a first cell pole plate 121 and a first cell pole liner 122 connected to one side of the first cell pole plate 121, the first cell pole plate 121 covers the large-sized hole of the first step hole 113 of the first insulating member 11, and the first cell pole liner 122 includes a first riveted fixing portion 122a passing through the first step hole 113 of the first insulating member 11.

[0051] In some embodiments, the material of the first battery cell pole plate 121 of the first battery cell pole 12 is selected from any one of silver, copper, gold, aluminum, nickel and iron, preferably aluminum.

[0052] In some embodiments, the material of the first battery cell pole lining 122 of the first battery cell pole 12 is selected from any one of silver, copper, gold, aluminum, nickel and iron, preferably copper.

[0053] As an embodiment of the present invention, the connection method of the first battery cell pole plate 121 and the first battery cell pole liner 122 includes, for example, any one of riveting, ultrasonic welding and explosion welding.

[0054] Combination Figure 1 , Figure 2 , Figure 7 and Fig.10 As shown, in the battery cell top cover assembly provided by the utility model, in the first electrode terminal assembly 1, the first sealing member 13 is located in the annular space between the side wall of the first cell pole liner 122 of the first cell pole 12 and the inner wall of the first step hole 113 of the first insulating member 11, and is sleeved on the periphery of the first cell pole liner 122 of the first cell pole 12, and is used to seal the gap between the first cell pole 12 and the first insulating member 11, thereby ensuring the sealing of the battery cell top cover.

[0055] On the other hand, in the battery cell top cover assembly provided by the present invention, the second electrode terminal assembly 3 (i.e., the positive electrode terminal assembly) is arranged on the second electrode lead-out hole 22 of the cover plate 2, wherein the second electrode terminal assembly 3 includes: a second insulating member 31, a second battery cell pole 32 and a second sealing member 33.

[0056] Furthermore, combined with Figure 1 , Figure 2 , Figure 7 and Fig. 9 As shown, in the battery cell top cover assembly provided by the utility model, in the second electrode terminal assembly 3, the second insulating member 31 is made of plastic material, integrally injection-molded on the second electrode lead-out hole 22 of the cover plate 2, and includes a second base 311 and a second boss 312 located on the second base 311, and the second base 311 is clamped on one side of the cover plate 2 (i.e. Figure 1 and Figure 2 The second boss 312 passes through the second electrode lead-out hole 22 of the cover plate 2 and extends to the other side of the cover plate 2 (i.e. Figure 1 and Figure 2The second base 311 and the second boss 312 have a penetrating second step hole 313 , and the large-sized hole of the second step hole 313 is located on one side of the second boss 312 .

[0057] Combination Figure 1 , Figure 2 , Figure 7 and Fig.12 As shown, in the battery cell top cover assembly provided by the utility model, in the second electrode terminal assembly 3, the second cell pole 32 includes an integrally formed second cell pole plate 321 and a second cell pole lining 322 located on one side of the second cell pole plate 321, the second cell pole plate 321 covers the large-sized hole of the second step hole 313 of the second insulating member 31, and the second cell pole lining 322 includes a second riveted fixing portion 322a passing through the second step hole 313 of the second insulating member 31.

[0058] In some embodiments, the material of the second battery cell pole 32 is selected from any one of silver, copper, gold, aluminum, nickel and iron, preferably aluminum.

[0059] Combination Figure 1 , Figure 2 , Figure 7 and Fig.10 As shown, in the battery cell top cover assembly provided by the utility model, in the second electrode terminal assembly 3, the second sealing member 33 is located in the annular space between the side wall of the second cell pole liner 322 of the second cell pole 32 and the inner wall of the second step hole 313 of the second insulating member 31, and is sleeved on the outer periphery of the second cell pole liner 322 of the second cell pole 32, and is used to seal the gap between the second cell pole 32 and the second insulating member 31, thereby ensuring the sealing of the battery cell top cover.

[0060] Combination Figure 1 , Figure 2 and combination Figure 8 As shown, in the battery cell top cover assembly provided by the utility model, a pressure relief hole 23 and a liquid injection hole 24 are further provided on the cover plate 2, and a pressure relief member 4 is provided on the pressure relief hole 23, and the pressure relief member 4 includes an explosion-proof sheet 41 (such as Fig.13 ) and a dust cover plate 42 (as shown) covering the explosion-proof disk 41. Fig.14 shown).

[0061] In a battery cell top cover assembly provided by the utility model, it also includes a core positioning block 5, which is located on the side of the cover plate 2 facing the core, and the top of the battery core rests on the core positioning block 5; the core positioning block 5 is three plastic parts, which are respectively arranged on one side of the first electrode lead-out hole 21, one side of the second electrode lead-out hole 22 and at the pressure relief hole 23, and are integrally injection-molded on the cover plate 2 with the first insulating part 11 in the first electrode terminal assembly 1 and the second insulating part 31 in the second electrode terminal assembly 3.

[0062] The assembly process of the battery cell top cover assembly provided by the utility model comprises the following steps:

[0063] Step (1), first Figure 8 A first electrode lead-out hole 21 , a second electrode lead-out hole 22 , a pressure relief hole 23 and a liquid injection hole 24 are made on the cover plate 1 of the structure shown.

[0064] Step (2), plastic parts are integrally molded on the first electrode lead-out hole 21 by injection molding. Fig. 9 The first insulating member 11 of the structure shown in the figure is integrally formed by injection molding on the second electrode lead-out hole 22. Fig. 9 The second insulating member 31 of the structure shown in the figure is also integrally molded and injection molded as shown in the figure. Figure 1 and Figure 2 The winding core positioning block 5 of the structure shown.

[0065] Step (3), using any one of riveting, ultrasonic welding and explosion welding to weld the Fig.11 The first cell pole liner 122 of the structure shown is welded to Fig.11 The first cell pole plate 121 of the structure shown in the figure forms the first cell pole 12, and then Fig.10 The first seal 13 of the structure shown in the figure is sleeved on the outer periphery of the first cell pole liner 122, and then the first cell pole 12 is sealed as shown in the figure. Figure 2 The cover is placed in the first step hole 113 of the first insulating member 11 in the direction shown, and the first sealing member 13 located at the outer periphery of the first cell pole liner 122 is fixed to the inner wall of the first step hole 113 of the first insulating member 11, and the first riveting fixing portion 122a of the first cell pole liner 122 of the first cell pole 12 extends out of the back side of the cover plate 1, forming a Figure 3 The three-dimensional structural schematic diagram of the back side of the assembled battery cell top cover assembly before riveting is shown.

[0066] Step (4), plastic parts are integrally molded on the second electrode lead-out hole 22 by injection molding. Fig. 9 The second insulating member 31 of the structure shown in the figure is formed by metal injection molding. Fig.12 The second cell pole 32 of the structure shown in FIG. Fig.10The second sealing member 33 of the structure shown in the figure is sleeved on the outer periphery of the second cell pole liner 322 of the second cell pole 32, and then the second cell pole 32 is sealed as shown in the figure. Figure 2 The second step hole 313 of the second insulating member 31 is covered in the direction shown, and the second sealing member 33 located at the outer periphery of the second cell pole liner 322 is fixed to the inner wall of the second step hole 313 of the second insulating member 31, and the second riveting fixing portion 322a of the second cell pole liner 322 of the second cell pole 32 extends out of the back side of the cover plate 1, forming a Figure 3 The three-dimensional structural schematic diagram of the back side of the assembled battery cell top cover assembly before riveting is shown.

[0067] Step (5), simultaneously rivet the first rivet fixing portion 122a of the first cell pole liner 122 of the first cell pole 12 and the second rivet fixing portion 322a of the second cell pole liner 322 of the second cell pole 32 to form a Figure 4 The back side of the assembled battery cell top cover assembly is a schematic diagram of the three-dimensional structure after riveting.

[0068] During the riveting process, since the first riveting fixing portion 122a of the first cell pole liner 122 of the first cell pole 12 is pressed against the inner wall of the first step hole 113 of the first insulating member 11, the first sealing member 13 between the side wall of the first cell pole liner 122 of the first cell pole 12 and the inner wall of the first step hole 113 of the first insulating member 11 is further squeezed, thereby further improving the sealing between the first cell pole 12 and the first insulating member 11.

[0069] Similarly, during the riveting process, since the second riveting fixing portion 322a of the second cell pole liner 322 of the second cell pole 32 is squeezed toward the inner wall of the second step hole 313 of the second insulating member 31, the second sealing member 33 between the side wall of the second cell pole liner 322 of the second cell pole 32 and the inner wall of the second step hole 313 of the second insulating member 31 is further squeezed, thereby further improving the sealing between the second cell pole 32 and the second insulating member 31.

[0070] Figure 5 and Figure 6 They are Figure 1 Schematic diagram of the planar structure of the components of the battery cell top cover assembly on the back side after assembly before and after riveting.

[0071] In the battery cell top cover assembly provided by the utility model, as an embodiment, the first electrode terminal assembly 1 installed in the first electrode lead-out hole 21 of the cover plate 2 can be used as the positive electrode terminal assembly, and the second electrode terminal assembly 3 installed in the second electrode lead-out hole 22 of the cover plate 2 can be used as the negative electrode terminal assembly; as another embodiment, the first electrode terminal assembly 1 installed in the first electrode lead-out hole 21 of the cover plate 2 can be used as the negative electrode terminal assembly, and the second electrode terminal assembly 3 installed in the second electrode lead-out hole 22 of the cover plate 2 can be used as the positive electrode terminal assembly.

[0072] Compared with the existing electrode terminal assemblies, the two electrode terminal assemblies provided by the utility model, and the battery cell top cover assembly including the two electrode terminal assemblies, have fewer parts in the assembly, simplify the structure of the battery cell cover assembly, improve the space utilization rate of the lithium battery cell, and further improve the energy density of the battery cell; due to the reduction of parts and interfaces, the failure points are effectively reduced, thereby improving the yield rate of the battery cell, reducing the probability of battery cell failure, and ensuring the reliability of the battery system.

[0073] <Battery Cells and Battery Packs>

[0074] According to the prior art, a battery cell used to form a battery pack for a new energy vehicle generally includes a top cover assembly, a shell and an electrode assembly. In the present utility model, the top cover assembly of the battery cell adopts the battery cell top cover assembly provided by the present utility model, and the electrode lead of the positive electrode sheet or the negative electrode sheet in the electrode assembly is connected to the first cell column lining 122 of the first electrode terminal assembly 1 located on the first electrode lead-out hole 21 of the cover plate 2 in the battery cell top cover assembly provided by the present utility model, or is connected to the battery cell top cover assembly provided by the present utility model The third cell pole liner 322 of the second cell pole 32 of the second electrode terminal assembly 3 located on the second electrode lead-out hole 22 of the cover plate 2 in the cell top cover assembly is connected, and then the first cell pole plate 121 of the first cell pole 12 of the first electrode terminal assembly 1 in the above-mentioned battery cell top cover assembly provided by the utility model is connected to an external power source, or the second cell pole plate 321 of the second cell pole 32 of the second electrode terminal assembly 3 in the above-mentioned battery cell top cover assembly provided by the utility model is connected to an external power source, so as to energize the battery cell. During assembly or use, the (supplemented) electrolyte can be injected through the injection hole 24 located on the cover plate 2 in the above-mentioned battery cell top cover assembly provided by the utility model.

[0075] In a battery cell top cover assembly provided by the present invention, the pressure relief member 4 located on the pressure relief hole 23 of the cover plate 2 is used to release the pressure inside the battery cell when the internal pressure or temperature of the battery cell reaches a threshold value. The explosion-proof piece 41 of the pressure relief member 4 can also be an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, etc.

Claims

1. An electrode terminal assembly for a battery cell top cover, arranged on a cover plate with a first electrode lead-out hole and a second electrode lead-out hole, characterized in that: The electrode terminal assembly for the battery cell top cover comprises: A first insulating member and a second insulating member, wherein the first insulating member and the second insulating member respectively penetrate the first electrode lead-out hole and the second electrode lead-out hole of the cover plate and extend toward the other side of the cover plate; a first sealing member and a second sealing member are respectively disposed between the first insulating member, the second insulating member and the first electrode lead-out hole and the second electrode lead-out hole; A first cell pole, comprising a first cell pole plate and a first cell pole liner connected to one side of the first cell pole plate, wherein the first cell pole liner comprises a riveting fixing portion and a connecting column connected to the first cell pole plate; the first cell pole is inserted into the first electrode lead-out hole on the cover plate through a first insulating member and is riveted and fixedly connected to the cover plate through the riveting fixing portion on the first cell pole liner; The second battery cell pole comprises an integrally formed second battery cell pole plate and a second battery cell pole lining located on one side of the battery cell pole plate, wherein the second battery cell pole lining comprises a riveted fixing portion; the second battery cell pole is inserted into the second electrode lead-out hole on the cover plate through a second insulating member and is riveted and fixedly connected to the cover plate through the riveted fixing portion on the second battery cell pole lining.

2. The electrode terminal assembly for a battery cell top cover according to claim 1, characterized in that: The insulating member is made of plastic and is integrally injection-molded on the first electrode lead-out hole of the cover plate.

3. The electrode terminal assembly for a battery cell top cover according to claim 1, characterized in that: The material of the cell pole plates in the first cell pole and the second cell pole is selected from any one of silver, copper, gold, aluminum, nickel and iron.

4. The electrode terminal assembly for a battery cell top cover according to claim 1, characterized in that: The material of the inner lining of the first battery cell pole and the second battery cell pole is selected from any one of silver, copper, gold, aluminum, nickel and iron.

5. The electrode terminal assembly for a battery cell top cover according to claim 1, characterized in that: The connection method of the first battery cell pole plate and the first battery cell pole liner is selected from any one of riveting, ultrasonic welding and explosion welding.

6. The electrode terminal assembly for a battery cell top cover according to claim 1, characterized in that: The first insulating member and the second insulating member respectively include a base and a boss located on the base, the base is clamped on one side of the cover plate, the boss passes through the first or second electrode lead-out hole of the cover plate and extends toward the other side of the cover plate, the base and the boss have a penetrating step hole, and the large-size hole of the step hole is located on one side of the boss.

7. A battery cell top cover assembly, comprising a cover plate provided with a first electrode lead-out hole and a second electrode lead-out hole, characterized in that: It also includes an electrode terminal assembly for a battery cell top cover as described in any one of claims 1 to 6 that can be installed in the first electrode lead-out hole and the second electrode lead-out hole of the cover plate.

8. The battery cell top cover assembly according to claim 7, characterized in that: The cover plate is also provided with a pressure relief hole and a liquid injection hole, and the liquid injection hole is located beside the pressure relief hole.

9. The battery cell top cover assembly according to claim 8, characterized in that: It also includes a pressure relief member installed in the pressure relief hole, which is used to release the pressure inside the battery when the internal pressure or temperature of the battery reaches a threshold value; the pressure relief member includes an explosion-proof plate covering the pressure relief hole of the cover plate and a dust cover plate covering the explosion-proof plate.

10. The battery cell top cover assembly according to claim 9, characterized in that: It also includes a core positioning block, which is located on the side of the cover plate facing the core, and the top of the battery core rests on the core positioning block; the core positioning block is three plastic parts, which are respectively arranged on one side of the first electrode lead-out hole, one side of the second electrode lead-out hole and at the pressure relief hole, and are integrally injection-molded on the cover plate with the insulating part in the electrode terminal assembly for the battery cell top cover.

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