Double-seal battery top cover assembly

Abstract

The dual-seal battery top cover assembly comprises a top cover plate, a positive electrode structure and a negative electrode structure, a first assembly hole and a second assembly hole are formed in the top cover plate, and the negative electrode structure comprises a copper-aluminum pole, a first upper insulating part, a first sealing ring and an aluminum pole; the positive pole structure comprises a first pole body, a second pole body, a second upper insulating part and a second sealing ring, the copper-aluminum pole is assembled at the first assembly hole through the aluminum pole, the first sealing ring and the first upper insulating part, and the first pole is assembled at the second assembly hole through the second pole body, the second upper insulating part and the second sealing ring; the first annular through groove of the first upper insulating part and the second annular through groove of the second upper insulating part are respectively filled with a first high-temperature-resistant sealant and a second high-temperature-resistant sealant, so that one sealing part in the positive electrode structure and the negative electrode structure on the top cover plate has the characteristic of high temperature resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of pole structures for new energy vehicle batteries, and in particular to a battery top cover assembly with double seals. Background Art

[0002] The battery top cover assembly is an important component of the outer shell of a new energy vehicle battery. Its main function is to protect the battery cells and liquid inside the outer shell, and the battery top cover assembly is also used to connect and conduct electricity with the battery cells inside the battery outer shell. In the prior art, when installing the electrode post in the assembly hole of the top cover plate, generally only one sealing ring is used to fit the electrode post in the assembly hole of the top cover plate, and then the pole post is fixed on the top cover plate by an auxiliary installation part in a laser welding manner. The sealing ring is made of fluororubber material. However, the battery top cover assembly assembled in this way has the following defects: 1. Before the new energy vehicle battery is manufactured and shipped from the factory, a battery short-circuit test needs to be carried out. However, during the battery short-circuit test, a high temperature of 500 °C will be generated. However, the generation of high temperature will cause the sealing ring to be burned and damaged, and also cause the sealing to fail; 2. The sealing effect of a single sealing ring is poor. Especially under long-term temperature changes, the sealing ring ages too fast, resulting in deformation of the sealing ring, and thus reducing or even failing the sealing effect of the pole post structure on the top cover plate. When the sealing fails, it is very likely that the battery leaks liquid, thus triggering a safety accident. At the same time, it is also possible for impurities such as dust or dust or liquid to enter the battery case. Such a battery top cover assembly can no longer meet the existing usage requirements.

[0003] Therefore, based on the above defects, there is an urgent need for a battery top cover assembly with double seals. Summary of the Invention

[0004] The purpose of the present invention is to design a battery top cover assembly with double seals to solve the above-mentioned technical deficiencies.

[0005] A battery top cover assembly with double seals designed by the present invention includes: A top cover plate, on which a first assembly hole is provided; A copper-aluminum pole post, which includes a copper conductor and an aluminum conductor. The copper conductor includes a first convex hull and an annular body provided on the outer peripheral side of the first convex hull. The aluminum conductor includes a connection plate and a surrounding part provided on the outer periphery of the connection plate and arranged continuously or at intervals. The connection plate is attached to the top surface of the first convex hull and the two are welded and fixed to each other. The surrounding part covers the outer periphery of the first convex hull. The surrounding part is provided with at least one fixing hole, and a fixing convex is formed on the outer side of the first convex hull at the position of the fixing hole. The fixing convex presses on the lower inner wall of the fixing hole so that the first convex hull and the aluminum conductor are combined with each other to form a pole post part; The first upper insulating part, which is adhesively arranged on the upper surface of the top cover plate in the area with the first assembly hole, is provided with a first accommodating hole and a first annular through groove arranged around the first accommodating hole; The first sealing ring, which is adhesively arranged on the lower surface of the top cover plate in the area with the first assembly hole; The aluminum pole column, which is located above the first assembly hole; Wherein, the pole column part of the copper-aluminum pole column is accommodated in the first accommodating hole after passing through the first sealing ring. The aluminum pole column is adhesively arranged on the upper surface of the first upper insulating part, so that at least part of the conducting plate is in contact with and welded to at least part of the aluminum pole column. The annular body abuts against the lower surface of the first sealing ring, and the first annular through groove is filled with a first high-temperature resistant sealant. The upper and lower end surfaces of the first high-temperature resistant sealant are hermetically joined to the upper surface of the top cover plate and the lower surface of the aluminum pole column respectively.

[0006] According to the above-mentioned battery top cover assembly with double seals, it further includes a first pole column body, a second pole column body, a second upper insulating part and a second sealing ring; the first pole column body includes a second convex bump and a limiting body located on the outer periphery of the second convex bump. The second upper insulating part is adhesively arranged on the upper surface of the top cover plate in the area with the second assembly hole, and is provided with a second accommodating hole and a second annular through groove arranged around the second accommodating hole. The second sealing ring is adhesively arranged on the lower surface of the top cover plate in the area with the second assembly hole, and the inner hole of the second sealing ring corresponds to the second assembly hole; the second convex bump and the limiting body are combined to form an integral first pole column body, and both the first pole column body and the second pole column body are made of aluminum material; the second convex bump passes through the second assembly hole, the second accommodating hole and the inner hole of the second sealing ring, and the upper surface of the limiting body is adhesively arranged on the lower surface of the second sealing ring. The second pole column body is in contact with the upper surface of the second upper insulating part and the top surface of the second convex bump, and at least part of the second pole column body is welded to the top surface of the second convex bump. The second annular through groove is filled with a second high-temperature resistant sealant, and the upper and lower surfaces of the second high-temperature resistant sealant are hermetically joined to the top cover plate and the second pole column body respectively.

[0007] According to the double-sealed battery top cover assembly described above, the first upper insulating member and the second upper insulating member include an inner ring body and an outer ring body disposed around the inner ring body. The inner peripheral wall of the outer ring body and the outer peripheral wall of the inner ring body are connected by a connecting body. A first annular through groove is formed between the inner peripheral wall of the outer ring body and the outer peripheral wall of the inner ring body in the first upper insulating member, and a first receiving hole corresponding to the position of the first assembly hole is formed on the inner ring body of the first upper insulating member. A second annular through groove is formed between the inner peripheral wall of the outer ring body and the outer peripheral wall of the inner ring body in the second upper insulating member, and a second receiving hole corresponding to the position of the second assembly hole is formed on the inner ring body of the second upper insulating member.

[0008] According to the double-sealed battery top cover assembly described above, at least one injection hole is provided on both the aluminum pole column and the second pole column body. The injection hole of the aluminum pole column is correspondingly arranged at a partial position of the first annular through groove, and the injection hole of the second pole column body is correspondingly arranged at a partial position of the second annular through groove. The first high-temperature sealant completely fills the first annular through groove and cures after passing through the injection hole of the aluminum pole column in a fluid state, and the second high-temperature sealant completely fills the second annular through groove and cures after passing through the injection hole of the second pole column body in a fluid state.

[0009] According to the double-sealed battery top cover assembly described above, both the aluminum pole column and the second pole column body include a first aluminum sheet and a second aluminum sheet that are stacked and welded together. Injection holes corresponding to each other are provided on both the first aluminum sheet and the second aluminum sheet. The first aluminum sheet of the aluminum pole column is welded and fixed to the conducting plate, and the first aluminum sheet of the second pole column body is welded and fixed to the top of the second convex bump. A conducting convex is provided on the upper surface of the second aluminum sheet, and injection holes corresponding to each other are provided on both the first aluminum sheet and the second aluminum sheet.

[0010] According to the double-sealed battery top cover assembly described above, continuous or discontinuous convex ribs are formed on the upper surface of the area of the top cover plate having the first assembly hole and the second assembly hole. The inner wall of each convex rib encloses a positioning space on the upper surface of the top cover plate, and the first upper insulating member and the second upper insulating member are respectively fitted into the positioning spaces.

[0011] According to the double-sealed battery top cover assembly described above, a continuous or discontinuous positioning convex is formed on the upper surface edge of the outer ring body. The inner wall of the positioning convex abuts against the outer peripheral wall of the second pole column body. A continuous or discontinuous protruding portion is formed on the outer wall of the positioning convex, and the lower surface of the protruding portion abuts against the upper end surface of the convex rib.

[0012] According to a double-sealed battery top cover assembly described above, an extension ring is formed by extending the inner side of the inner ring body, and an annular filler is formed by extending the lower surface of the extension ring. The annular filler of the first upper insulating member is placed between the outer wall of the aluminum conductor and the inner wall of the first assembly hole, and the annular filler of the second upper insulating member is placed between the inner wall of the second assembly hole and the outer peripheral wall of the second convex. At least one cover piece is formed on the inner wall of the extension ring of the first upper insulating member, and the cover piece is correspondingly located in the fixing hole to cover the fixing convex.

[0013] According to a double-sealed battery top cover assembly described above, connecting ears are formed on opposite sides of the limiting body and opposite sides of the annular body.

[0014] According to a double-sealed battery top cover assembly described above, a lower insulating member is further included. The lower insulating member is attached to the lower surface of the top cover plate. Clamping protrusions are further formed on opposite sides of the limiting body and opposite sides of the annular body. There is a difference in position between the clamping protrusions and the corresponding connecting ears, so that the clamping protrusions are clamped in the clamping grooves of the lower insulating member, and the limiting body and the annular body also abut against the lower surface of the lower insulating member.

[0015] The beneficial effects of a double-sealed battery top cover assembly described in the present invention are as follows: 1. The copper-aluminum pole column and the aluminum pole column are assembled at the first assembly hole of the top cover plate through the first sealing ring and the first high-temperature resistant sealant. The first pole column and the second pole column are assembled at the second assembly hole of the top cover plate through the second sealing ring and the second high-temperature resistant sealant. Thus, both the copper-aluminum pole column and the aluminum pole column are hermetically installed with the top cover plate, and the first pole column and the second pole column are also hermetically installed with the top cover plate. Furthermore, double-sealed installation is achieved, making the seal more reliable. At the same time, both the first high-temperature resistant sealant and the second high-temperature resistant sealant are high-temperature resistant A / B adhesives, and the high-temperature resistant A / B adhesive has the characteristic of withstanding high temperatures. Therefore, when a short-circuit test is performed on a battery with the battery top cover assembly of the present invention, neither the first high-temperature resistant sealant nor the second high-temperature resistant sealant will show a burning phenomenon, ensuring no leakage under the short-circuit test.

[0016] 2. Both the aluminum pole column and the second pole column body are composed of the first aluminum sheet and the second aluminum sheet welded and fixed to each other, and the thicknesses of the first aluminum sheet and the second aluminum sheet are relatively small. Therefore, a stamping machine with a relatively small tonnage can be used to stamp and form the first aluminum sheet and the second aluminum sheet, making the forming of the first aluminum sheet and the second aluminum sheet more convenient and reducing the production difficulty.

[0017] 3. The copper conductor and the aluminum conductor are fixed by welding and riveting, making the fixed connection between the copper conductor and the aluminum conductor more reliable and improving the connection stability between the two.

[0018] 4. The first pole body and the second pole body are fixed by welding, which improves the fixing firmness between the first pole body and the second pole body and meets the connection strength requirements of the welded positive pole column structure. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the battery top cover assembly.

[0020] Figure 2 It is a full cross-sectional view of the battery top cover assembly.

[0021] Figure 3 It is a partial structural cross-sectional view (one) of the battery top cover assembly.

[0022] Figure 4 It is a partial structural cross-sectional view (two) of the battery top cover assembly.

[0023] Figure 5 It is a schematic structural diagram of the negative electrode structure of the battery top cover assembly.

[0024] Figure 6 It is a schematic structural diagram of the positive electrode structure of the battery top cover assembly.

[0025] Figure 7 It is an exploded view of the battery top cover assembly.

[0026] Figure 8 It is a three-dimensional view of the front of the battery top cover assembly.

[0027] Figure 9 It is a three-dimensional view of the back of the battery top cover assembly.

[0028] Figure 10 It is a schematic structural diagram (one) of the copper conductor.

[0029] Figure 11 It is a schematic structural diagram of the aluminum conductor.

[0030] Figure 12 It is a schematic structural diagram of the first pole body.

[0031] Figure 13 It is an exploded view of the first upper insulating part.

[0032] Figure 14 It is a schematic structural diagram of the first upper insulating part.

[0033] Figure 15 It is an exploded view of the second upper insulating part.

[0034] Figure 16 It is a schematic structural diagram of the second upper insulating part.

[0035] Figure 17 It is a schematic structural diagram (two) of the copper conductor.

[0036] Reference numerals in the drawings: 1, top cover plate; 11, first assembly hole; 12, second assembly hole; 13, rib; 14, positioning space; 15, bevel; 2, lower insulating part; 21, limiting groove; 22, clamping groove; 23, limiting convex part; 24, concave; 100, negative electrode structure; 110, copper-aluminum pole column; 120, aluminum pole column; 130, first upper insulating part; 140, first sealing ring; 150, first high-temperature resistant sealant; 111, copper conductor; 112, aluminum conductor; 113, first convex hull; 114, annular body; 115, connecting plate; 116, enclosing part; 117, fixing hole; 118, fixing convex; 119, clamping convex; 121, first aluminum sheet; 122, second aluminum sheet; 123, conductive convex; 124, injection hole; 200, positive electrode structure; 210, first pole column body; 220, second pole column body; 230, second upper insulating part; 240, second sealing ring; 250, second high-temperature resistant sealant; 211, second convex hull; 212, limiting body; 213, cavity; 214, connecting ear; 235, second annular through groove; 131, outer ring body; 132, inner ring body; 133, positioning convex; 134, protruding part; 135, first annular through groove; 136, extension ring; 137, annular filling body; 138, cover plate; 139, first accommodating hole; 141, connecting body; 231, second accommodating hole. Detailed implementation mode

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0038] Embodiment: Figures 1 - 17 As shown, a double-sealed battery top cover assembly described in this embodiment includes a top cover plate 1, a positive electrode structure 200, and a negative electrode structure 100. First assembly holes 11 and second assembly holes 12 for the positive electrode structure 200 and the negative electrode structure 100 to be adaptively installed are provided on the top cover plate 1. The negative electrode structure 100 includes a copper-aluminum pole column 110, a first upper insulating part 130, a first sealing ring 140, and an aluminum pole column 120. The positive electrode structure 200 includes a first pole column body 210, a second pole column body 220, a second upper insulating part 230, and a second sealing ring 240.

[0039] I. Assembly of the negative electrode structure 100: As Figure 2 ,Figure 3 , Figure 5 , Figure 7 , Figure 8 and Figure 17 As shown in Figure 5 , Figure 7 , Figure 8 and Figure 17 , the copper-aluminum pole column 110 includes a copper conductor 111 and an aluminum conductor 112. The copper conductor 111 includes a first convex hull 113 and an annular body 114 disposed on the outer peripheral side of the first convex hull 113. The aluminum conductor 112 includes a conducting plate 115 and a surrounding portion 116 disposed on the outer periphery of the conducting plate 115 and arranged continuously or at intervals. The continuously arranged surrounding portion 116 is a surrounding portion 116 with an annular structure, and the intermittently arranged surrounding portion 116 is a plurality of surrounding portions 116 spaced apart from each other and arranged in an annular pattern. The conducting plate 115 is fitted and disposed on the top surface of the first convex hull 113 and the two are welded and fixed to each other. The surrounding portion 116 covers the outer periphery of the first convex hull 113. The surrounding portion 116 is provided with at least one fixing hole 117. In order to make the fixed connection between the aluminum conductor 112 and the copper conductor 111 more stable, generally a plurality of fixing holes 117 are provided. On the outer side of the first convex hull 113 at each fixing hole 117, a fixing protrusion 118 is formed by riveting. The fixing protrusion 118 is pressed against the lower inner wall of the fixing hole 117 so that the first convex hull 113 and the aluminum conductor 112 are combined with each other to form a pole column portion.

[0040] The first upper insulating member 130 is fitted and disposed on the upper surface of the top cover plate 1 in the area having the first assembly hole 11. The first upper insulating member 130 is provided with a first receiving hole 139 and a first annular through groove 135 disposed around the first receiving hole 139. The first upper insulating member 130 is made of a plastic material, and the outer shape of the first upper insulating member 130 may be square or circular, but in this embodiment, a square shape is preferably adopted.

[0041] The first sealing ring 140 is fitted and disposed on the lower surface of the top cover plate 1 in the area having the first assembly hole 11. The first sealing ring 140 is made of a fluororubber material.

[0042] The aluminum pole column 120 is located above the first assembly hole 11. The outer shape of the aluminum pole column 120 may be square or circular, but in this embodiment, a square shape is preferably adopted.

[0043] When the negative electrode structure 100 is assembled in the first assembly hole 11, the pole column part of the copper-aluminum pole column 110 passes through the first sealing ring 140 and is received in the first receiving hole 139. The aluminum pole column 120 is disposed in a fitting manner on the upper surface of the first upper insulating member 130, so that at least a part of the conducting plate 115 and at least a part of the aluminum pole column 120 are in contact with each other and are fixed by welding. The annular body 114 abuts against the lower surface of the first sealing ring 140. The first annular through groove 135 is filled with a first high-temperature resistant sealing adhesive 150. The upper surface and the lower surface of the first high-temperature resistant sealing adhesive 150 are hermetically joined to the upper surface of the top cover plate 1 and the lower surface of the aluminum pole column 120 respectively.

[0044] II. Assembly of the positive electrode structure 200: As Figure 2 , Figure 4 , Figures 6 - 8 shown, the first pole column body 210 includes a second convex hull 211 and a limiting body 212 located on the outer periphery of the second convex hull 211. The second upper insulating member 230 is disposed in a fitting manner on the upper surface of the area of the top cover plate 1 having the second assembly hole 12. The second upper insulating member 230 is provided with a second receiving hole 231 and a second annular through groove 235 disposed around the second receiving hole 231. The second sealing ring 240 is disposed in a fitting manner on the lower surface of the area of the top cover plate 1 having the second assembly hole 12. The inner hole of the second sealing ring 240 is correspondingly disposed with the second assembly hole 12. The second upper insulating member 230 is made of a plastic material, and the outer shape of the second upper insulating member 230 may be square or circular, but preferably square in this embodiment. The second sealing ring 240 is made of a fluororubber material. The outer shape of the second pole column body 220 may be square or circular, but preferably square in this embodiment.

[0045] When the positive electrode structure 200 is assembled in the second assembly hole 12, the second convex hull 211 and the limiting body 212 are combined with each other to form the first pole column body 210 of an integral structure, and both the first pole column body 210 and the second pole column body 220 are made of aluminum material. The second convex hull 211 is inserted through the second assembly hole 12, the second receiving hole 231 and the inner hole of the second sealing ring 240. The upper surface of the limiting body 212 is disposed in a fitting manner with the lower surface of the second sealing ring 240. The second pole column body 220 is in contact with the upper surface of the second upper insulating member 230 and the top surface of the second convex hull 211, and at least a part of the second pole column body 220 is fixed by welding to the top surface of the second convex hull 211. The second annular through groove 235 is filled with a second high-temperature resistant sealing adhesive 250, and the upper surface and the lower surface of the second high-temperature resistant sealing adhesive 250 are hermetically joined to the top cover plate 1 and the second pole column body 220 respectively.

[0046] As Figures 2 - 8As shown, preferably, at least one injection hole 124 is provided on both the aluminum pole column 120 and the second pole column body 220. The injection hole 124 of the aluminum pole column 120 is correspondingly arranged at a partial position of the first annular through groove 135, and the injection hole 124 of the second pole column body 220 is correspondingly arranged at a partial position of the second annular through groove 235. The first high-temperature resistant sealant 150 is completely filled into the first annular through groove 135 and cured after passing through the injection hole 124 of the aluminum pole column 120 in a fluid state, and the second high-temperature resistant sealant 250 is completely filled into the second annular through groove 235 and cured after passing through the injection hole 124 of the second pole column body 220 in a fluid state. The injection hole 124 can be multiple, so that the efficiency of injecting the fluid-like first high-temperature resistant sealant 150 and the second high-temperature resistant sealant 250 is higher. Generally, both the first high-temperature resistant sealant 150 and the second high-temperature resistant sealant 250 adopt high-temperature resistant A / B glue dedicated to the automotive manufacturing industry. The cured high-temperature resistant A / B glue has the characteristic of withstanding high temperature. Therefore, when a short-circuit test is performed on the battery with the battery top cover assembly of the present invention, neither the first high-temperature resistant sealant 150 nor the second high-temperature resistant sealant 250 will show a burning phenomenon, ensuring no liquid leakage under the short-circuit test.

[0047] In this embodiment, as Figures 2 - 6 、 Figures 13 - 16 shown, the first upper insulating member 130 and the second upper insulating member 230 include an inner ring body 132 and an outer ring body 131 arranged around the inner ring body 132. The inner peripheral wall of the outer ring body 131 is connected to the outer peripheral wall of the inner ring body 132 through a connecting body 141; a first annular through groove 135 is formed between the inner peripheral wall of the outer ring body 131 and the outer peripheral wall of the inner ring body 132 in the first upper insulating member 130, and a first receiving hole 139 corresponding to the position of the first assembly hole 11 is formed on the inner ring body 132 of the first upper insulating member 130; a second annular through groove 235 is formed between the inner peripheral wall of the outer ring body 131 and the outer peripheral wall of the inner ring body 132 in the second upper insulating member 230, and a second receiving hole 231 corresponding to the position of the second assembly hole 12 is formed on the inner ring body 132 of the second upper insulating member 230; wherein the inner ring body 132, the outer ring body 131 and the connecting body 141 are all made of plastic material and are integrally combined with each other. In order to make the connection strength between the inner ring body 132 and the outer ring body 131 better, the number of the connecting bodies 141 can be set to be multiple and arranged at intervals.

[0048] Preferably, a positioning projection 133 that is continuously or discontinuously provided is formed on the upper surface edge of the outer ring body 131. The continuously provided positioning projection 133 is a positioning projection 133 having an annular structure, and the discontinuously provided positioning projection 133 is a plurality of positioning projections 133 that are spaced apart from each other and arranged in an annular shape. The inner wall of the positioning projection 133 abuts against the outer peripheral wall of the second pole body 220; the structural arrangement mainly positions the second pole body 220 and the aluminum pole 120.

[0049] Further preferably, a protruding portion 134 that is continuously or discontinuously provided is formed on the outer wall of the positioning projection 133. The lower surface of the protruding portion 134 abuts against the upper end surface of the rib 13. The continuously provided protruding portion 134 is a protruding portion 134 having an annular structure, and the discontinuously provided protruding portion 134 is a plurality of protruding portions 134 that are spaced apart from each other and arranged in an annular shape. The structural arrangement covers the rib 13 to protect the rib 13.

[0050] Preferably, an extension ring 136 is formed by extending the inner side of the inner ring body 132. An annular filling body 137 extends downward from the lower surface of the extension ring 136. The annular filling body 137 of the first upper insulating member 130 is placed between the outer wall of the aluminum conductor 112 and the inner wall of the first fitting hole 11. The annular filling body 137 of the second upper insulating member 230 is placed between the inner wall of the second fitting hole 12 and the outer peripheral wall of the second convex portion 211. At least one cover piece 138 is formed on the inner wall of the extension ring 136 of the first upper insulating member 130. The cover piece 138 is correspondingly located in the fixing hole 117 to cover the fixing projection 118. The structural arrangement makes the positioning of the upper insulating member more reliable and improves the compactness and stability after the pole is installed.

[0051] In this embodiment, as Figures 2 - 7As shown, the aluminum pole column 120 and the second pole column body 220 both include a first aluminum sheet 121 and a second aluminum sheet 122 that are stacked and welded together. Injection holes 124 corresponding to each other are provided on both the first aluminum sheet 121 and the second aluminum sheet 122. The first aluminum sheet 121 of the aluminum pole column 120 is welded and fixed to the connection plate 115, and the first aluminum sheet 121 of the second pole column body 220 is welded and fixed to the top of the second convex hull 211. A conductive convex 123 is provided on the upper surface of the second aluminum sheet 122, and injection holes 124 corresponding to each other are provided on both the first aluminum sheet 121 and the second aluminum sheet 122. Among them, the welding methods between the first aluminum sheet 121 and the second aluminum sheet 122, between the first aluminum sheet 121 and the top of the second convex hull 211, and between the first aluminum sheet 121 and the top surface of the connection plate 115 of the aluminum conductor 112 all adopt ultrasonic welding or laser welding. When welding the aluminum pole column 120 on the aluminum conductor 112, first stack the first aluminum sheet 121 on the top surface of the connection plate 115 of the aluminum conductor 112, and then apply welding energy to the first aluminum sheet 121 to perform ultrasonic or laser energy penetration welding, so that the connection plate 115 is welded and fixed to the first aluminum sheet 121. Finally, stack the second aluminum sheet 122 on the top surface of the first aluminum sheet 121. At this time, apply welding energy to the second aluminum sheet 122 to perform ultrasonic or laser energy penetration welding, so that the first aluminum sheet 121 is welded and fixed to the second aluminum sheet 122. When welding the second pole column body 220 on the second convex hull 211, first stack the first aluminum sheet 121 on the top surface of the second convex hull 211, and then apply welding energy to the first aluminum sheet 121 to perform ultrasonic or laser energy penetration welding, so that the second convex hull 211 is welded and fixed to the first aluminum sheet 121. Finally, stack the second aluminum sheet 122 on the top surface of the first aluminum sheet 121. At this time, apply welding energy to the second aluminum sheet 122 to perform ultrasonic or laser energy penetration welding, so that the first aluminum sheet 121 is welded and fixed to the second aluminum sheet 122.

[0052] Furthermore, a conductive convex 123 is provided on the upper surface of the second aluminum sheet 122. The provision of the conductive convex 123 facilitates the conductive connection of the electronic control system of the battery.

[0053] In this embodiment, as Figure 7 and Figure 8As shown, on the upper surface of the area of the top cover plate 1 having the first assembly hole 11 and the second assembly hole 12, continuous or discontinuous ribbed protrusions 13 are formed. The continuously arranged ribbed protrusions 13 are in a circular ring structure, and the discontinuously arranged ribbed protrusions 13 are multiple ribbed protrusions 13 spaced apart from each other and arranged in a circular ring. The inner wall of each ribbed protrusion 13 encloses a positioning space 14 on the upper surface of the top cover plate 1. The first upper insulating member 130 and the second upper insulating member 230 are respectively fitted into each positioning space 14. Among them, the ribbed protrusions 13 can strengthen the strength of the top cover plate 1, so that the deformation of the top cover plate 1 of the new energy vehicle battery equipped with the battery top cover assembly of the present invention is smaller after inflation. At the same time, each ribbed protrusion 13 positions the first upper insulating member 130 and the second upper insulating member 230 respectively.

[0054] In this embodiment, as Figures 5 - 7 , Figure 9 , Figure 10 and Figure 12 shown, on the opposite sides of the limiting body 212 and the opposite sides of the annular body 114, connecting ears 214 are integrally formed. The connecting ears 214 are mainly welded and fixed to the pole ears of the battery cell. The structural setting makes it more convenient to weld the connecting ears 214 to the pole ears of the battery cell, simplifies the pole ear welding process, and improves the working efficiency of assembling the battery top cover assembly to the battery.

[0055] In this embodiment, as Figure 9 shown, it further includes a lower insulating member 2. The lower insulating member 2 is attached to the lower surface of the top cover plate 1. On the opposite sides of the limiting body 212 and the opposite sides of the annular body 114, clamping protrusions 119 are further formed. There is a difference in position between the clamping protrusions 119 and the corresponding connecting ears 214, so that the clamping protrusions 119 are clamped in the clamping grooves 22 of the lower insulating member 2. The limiting body 212 and the annular body 114 also abut against the lower surface of the lower insulating member 2. The structural setting makes the limiting body 212 and the annular body 114 more reliably insulated from the top cover plate 1. At the same time, the clamping protrusions 119 are clamped in the clamping grooves 22 of the lower insulating member 2, making the first pole column body 210 more stably installed on the top cover plate 1. The clamping protrusions 119 are radially arranged on both the limiting body 212 and the annular body 114, and the limiting body 212 and the annular body 114 are respectively placed in the respective limiting grooves 21 on the lower surface of the lower insulating member 2. On the opposite inner walls of the limiting grooves 21, limiting protrusions 23 are provided. The outer part of the limiting body 212 sinks into the concave 24 of the limiting protrusion 23, and on the other opposite inner walls of the limiting grooves 21, clamping grooves 22 are provided.

[0056] Finally, the external shapes of the continuously or intermittently provided ribs 13 and the outer ring body 131, and the continuously or intermittently provided positioning protrusions 133 are all square. After the first upper insulating member 130 is positioned in a positioning space 14 and the aluminum pole column 120 is positioned in the space formed by enclosing a positioning protrusion 133, the bevel angle 15 of the aluminum pole column 120 is correspondingly and cooperatively arranged with the bevel angle 15 of the space formed by enclosing a positioning protrusion 133. The bevel angle 15 of a positioning space 14 is correspondingly and cooperatively arranged with the bevel angle 15 on the outer ring body 131 of the first upper insulating member 130. After the second upper insulating member 230 is positioned in another positioning space 14 and the second pole column body 220 is positioned in the space formed by enclosing another positioning protrusion 133, the bevel angle 15 of the second pole column body 220 is correspondingly and cooperatively arranged with the bevel angle 15 of the space formed by enclosing another positioning protrusion 133. The bevel angle 15 of another positioning space 14 is correspondingly and cooperatively arranged with the bevel angle 15 on the outer ring body 131 of the second upper insulating member 230. The above structure can prevent the pole column and the upper insulating member after assembly from rotating. Cavities 213 are provided on both the first convex package 113 of the copper conductor 111 and the second convex package 211 of the first pole column body 210.

Claims

1. A double-sealed battery top cover assembly, characterized in that, Comprising: A top cover plate (1) provided with a first assembly hole (11) thereon; A copper-aluminum pole column (110), the copper-aluminum pole column (110) comprising a copper conductor (111) and an aluminum conductor (112), the copper conductor (111) comprising a first convex hull (113) and an annular body (114) disposed on the outer peripheral side of the first convex hull (113), the aluminum conductor (112) comprising a conducting connection plate (115) and a surrounding portion (116) disposed on the outer periphery of the conducting connection plate (115) and arranged continuously or at intervals, the conducting connection plate (115) being fitted on the top surface of the first convex hull (113) and the two being welded and fixed to each other, the surrounding portion (116) covering the outer periphery of the first convex hull (113), the surrounding portion (116) being provided with at least one fixing hole (117), and a fixing protrusion (118) being formed on the outer side portion of the first convex hull (113) at the position of the fixing hole (117), the fixing protrusion (118) being pressed against the lower inner wall of the fixing hole (117) so that the first convex hull (113) and the aluminum conductor (112) are combined with each other to form a pole column portion; A first upper insulating member (130), the first upper insulating member (130) being fitted on the upper surface of the top cover plate (1) in the area having the first assembly hole (11), the first upper insulating member (130) being provided with a first receiving hole (139) and a first annular through groove (135) arranged around the first receiving hole (139); A first sealing ring (140), the first sealing ring (140) being fitted on the lower surface of the top cover plate (1) in the area having the first assembly hole (11); An aluminum pole column (120), the aluminum pole column (120) being located above the first assembly hole (11); Wherein, the pole column portion of the copper-aluminum pole column (110) passes through the first sealing ring (140) and is received in the first receiving hole (139), the aluminum pole column (120) is fitted on the upper surface of the first upper insulating member (130) so that at least a part of the conducting connection plate (115) and at least a part of the aluminum pole column (120) are in contact with each other and welded and fixed to each other, the annular body (114) abuts against the lower surface of the first sealing ring (140), and the first annular through groove (135) is filled with a first high-temperature resistant sealant (150), and the upper end surface and the lower end surface of the first high-temperature resistant sealant (150) are hermetically joined to the upper surface of the top cover plate (1) and the lower surface of the aluminum pole column (120), respectively.

2. The double-sealed battery top cover assembly according to claim 1, wherein, Further comprising a first pole column body (210), a second pole column body (220), a second upper insulating member (230) and a second sealing ring (240); The first pole body (210) includes a second convex hull (211) and a limiting body (212) located on the outer periphery of the second convex hull (211). The second upper insulating member (230) is adhesively disposed on the upper surface of the area of the top cover plate (1) having the second assembly hole (12). The second upper insulating member (230) is provided with a second receiving hole (231) and a second annular through groove (235) disposed around the second receiving hole (231). The second sealing ring (240) is adhesively disposed on the lower surface of the area of the top cover plate (1) having the second assembly hole (12). The inner hole of the second sealing ring (240) is correspondingly disposed with the second assembly hole (12); the second convex hull (211) and the limiting body (212) are combined with each other to form the first pole body (210) of an integral structure, and both the first pole body (210) and the second pole body (220) are made of aluminum material; The second convex hull (211) is inserted into the second assembly hole (12), the second receiving hole (231), and the inner hole of the second sealing ring (240). The upper surface of the limiting body (212) is adhesively disposed with the lower surface of the second sealing ring (240). The second pole body (220) is adhesively disposed with the upper surface of the second upper insulating member (230) and the top surface of the second convex hull (211), and at least a part of the second pole body (220) is fixedly welded to the top surface of the second convex hull (211). The second annular through groove (235) is filled with a second high-temperature resistant sealant (250), and the upper surface and the lower surface of the second high-temperature resistant sealant (250) are hermetically joined to the top cover plate (1) and the second pole body (220) respectively.

3. The double-sealed battery top cover assembly according to claim 2, wherein, The first upper insulating member (130) and the second upper insulating member (230) include an inner ring body (132) and an outer ring body (131) disposed around the inner ring body (132). The inner peripheral wall of the outer ring body (131) is connected to the outer peripheral wall of the inner ring body (132) through a connecting body (141); A first annular through groove (135) is formed between the inner peripheral wall of the outer ring body (131) and the outer peripheral wall of the inner ring body (132) in the first upper insulating member (130). A first receiving hole (139) corresponding to the position of the first assembly hole (11) is formed on the inner ring body (132) of the first upper insulating member (130); a second annular through groove (235) is formed between the inner peripheral wall of the outer ring body (131) and the outer peripheral wall of the inner ring body (132) in the second upper insulating member (230). A second receiving hole (231) corresponding to the position of the second assembly hole (12) is formed on the inner ring body (132) of the second upper insulating member (230).

4. A double-sealed battery top cover assembly according to claim 2, characterized in that, At least one injection hole (124) is provided on both the aluminum pole column (120) and the second pole column body (220). The injection hole (124) of the aluminum pole column (120) is correspondingly arranged at a partial position of the first annular through groove (135), and the injection hole (124) of the second pole column body (220) is correspondingly arranged at a partial position of the second annular through groove (235). The first high-temperature resistant sealant (150) is completely filled into the first annular through groove (135) and cured after passing through the injection hole (124) of the aluminum pole column (120) in a fluid state, and the second high-temperature resistant sealant (250) is completely filled into the second annular through groove (235) and cured after passing through the injection hole (124) of the second pole column body (220) in a fluid state.

5. The double-sealed battery top cover assembly according to claim 4, characterized in that, Both the aluminum pole column (120) and the second pole column body (220) include a first aluminum sheet (121) and a second aluminum sheet (122) that are stacked and welded together. Injection holes (124) corresponding to each other are provided on both the first aluminum sheet (121) and the second aluminum sheet (122); the first aluminum sheet (121) of the aluminum pole column (120) is welded and fixed to the connection plate (115), and the first aluminum sheet (121) of the second pole column body (220) is welded and fixed to the top of the second convex hull (211). A conductive convex (123) is provided on the upper surface of the second aluminum sheet (122), and injection holes (124) corresponding to each other are provided on both the first aluminum sheet (121) and the second aluminum sheet (122).

6. The double-sealed battery top cover assembly according to claim 3, wherein, On the upper surface of the area of the top cover plate (1) having the first assembly hole (11) and the second assembly hole (12), continuous or discontinuous convex ribs (13) are formed. The inner wall of each convex rib (13) encloses a positioning space (14) on the upper surface of the top cover plate (1), and the first upper insulating member (130) and the second upper insulating member (230) are respectively fitted into each positioning space (14).

7. A dual-sealed battery top cover assembly according to claim 6, characterized in that, On the upper surface edge of the outer ring body (131), continuous or discontinuous positioning protrusions (133) are formed. The inner wall of the positioning protrusion (133) abuts against the outer peripheral wall of the second pole column body (220); on the outer wall of the positioning protrusion (133), continuous or discontinuous protrusions (134) are formed, and the lower surface of the protrusion (134) abuts against the upper end surface of the convex rib (13).

8. A double-sealed battery top cover assembly according to claim 7, characterized in that, An extension ring (136) extends inwardly from the inner side of the inner ring body (132), and an annular filling body (137) extends downward from the lower surface of the extension ring (136). The annular filling body (137) of the first upper insulating member (130) is placed between the outer wall of the aluminum conductor (112) and the inner wall of the first assembly hole (11), and the annular filling body (137) of the second upper insulating member (230) is placed between the inner wall of the second assembly hole (12) and the outer peripheral wall of the second convex hull (211). At least one cover plate (138) is formed on the inner wall of the extension ring (136) of the first upper insulating member (130), and the cover plate (138) is correspondingly located in the fixing hole (117) to cover the fixing convex (118).

9. A double-sealed battery top cover assembly according to any one of claims 2-8, characterized in that, Connection ears (214) are formed on opposite sides of both the limiting body (212) and the annular body (114).

10. A double-sealed battery top cover assembly according to claim 9, characterized in that, It further includes a lower insulating member (2), the lower insulating member (2) is adhesively disposed on the lower surface of the top cover plate (1), and engaging protrusions (119) are further formed on opposite sides of the limiting body (212) and opposite sides of the annular body (114). There is a positional difference between the engaging protrusion (119) and the corresponding connecting ear (214), so that the engaging protrusion (119) is engaged in the engaging groove (22) of the lower insulating member (2), and the limiting body (212) and the annular body (114) also abut against the lower surface of the lower insulating member (2).

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