A double-sealed battery top cover assembly

Abstract

The present invention discloses a double-sealed battery top cover assembly, including a top cover plate, a positive electrode structure and a negative electrode structure. A first assembly hole and a second assembly hole are provided on the top cover plate. The negative electrode structure includes a copper-aluminum electrode, a first upper insulating member, a first sealing ring and an aluminum electrode. The positive electrode structure includes a first electrode body, a second electrode body, a second upper insulating member and a second sealing ring. The copper-aluminum electrode is assembled at the first assembly hole through the aluminum electrode, the first sealing ring and the first upper insulating member. The first electrode is assembled at the second assembly hole through the second electrode body, the second upper insulating member and the second sealing ring. The first annular groove of the first upper insulating member and the second annular groove of the second upper insulating member are filled with a first high-temperature resistant sealant and a second high-temperature resistant sealant, respectively. Its structural arrangement ensures that one of the seals in the positive electrode structure and the negative electrode structure on the top cover plate has high-temperature resistant characteristics.

Description

Technical Field

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

[0002] The battery top cover assembly is an important component of the battery shell of new energy vehicles. It is mainly used to protect the battery cells and liquid in the shell. The battery top cover assembly is also used to connect to the battery cells in the battery shell and conduct electricity. In the existing technology, when installing the electrode column in the assembly hole of the top cover plate, only one sealing ring is generally used to fit the electrode column in the assembly hole of the top cover plate, and then the electrode column is fixed to the top cover plate by laser welding through auxiliary mounting parts. The sealing ring is made of fluororubber. However, the battery top cover assembly assembled in this way has the following defects:

[0003] 1. New energy vehicle batteries need to undergo a battery short-circuit test before they are manufactured. However, a high temperature of 500°C will be generated during the battery short-circuit test. The high temperature will cause the sealing ring to be burned and damaged, and will also cause the seal to fail.

[0004] 2. The sealing effect of a single sealing ring is poor, especially under long-term temperature changes. The sealing ring ages too quickly, causing the sealing ring to deform, resulting in reduced or even failure of the sealing effect of the pole structure on the top cover. When the seal fails, it is very likely that the battery will leak, causing a safety accident. At the same time, impurities such as dust, dirt, or liquid may also enter the battery casing. This type of battery top cover assembly can no longer meet existing usage requirements.

[0005] Therefore, based on the above defects, a double-sealed battery top cover assembly is urgently needed. Summary of the Invention

[0006] The purpose of the present invention is to provide a double-sealed battery top cover assembly designed to address the deficiencies of the above-mentioned technology.

[0007] The present invention provides a double-sealed battery top cover assembly, comprising:

[0008] A top cover plate, wherein a first assembly hole is provided on the top cover plate;

[0009] A copper-aluminum pole, comprising a copper conductor and an aluminum conductor, the copper conductor comprising a first convex bump and an annular body disposed on the outer periphery of the first convex bump; the aluminum conductor comprising a conducting plate and a continuously or intermittently arranged enclosure portion disposed on the outer periphery of the conducting plate; the conducting plate being fitted onto the top surface of the first convex bump and the two being welded and fixed to each other; the enclosure portion covering the outer periphery of the first convex bump; the enclosure portion being provided with at least one fixing hole; a fixing protrusion being formed on the outer side of the first convex bump at the fixing hole; the fixing protrusion being pressed onto the lower inner wall of the fixing hole so that the first convex bump and the aluminum conductor are combined to form a pole portion;

[0010] a first upper insulating member, the first upper insulating member being attached to the upper surface of the top cover plate in the area having the first assembly hole, the first upper insulating member being provided with a first receiving hole and a first annular through groove provided around the first receiving hole;

[0011] a first sealing ring, the first sealing ring being fitted on the lower surface of the top cover plate in an area having the first assembly hole;

[0012] an aluminum pole, the aluminum pole being located above the first assembly hole;

[0013] In which, the pole portion of the copper-aluminum pole is accommodated in the first accommodating hole after passing through the first sealing ring, and the aluminum pole is fitted on the upper surface of the first upper insulating member so that at least part of the conduction plate and at least part of the aluminum pole are fitted together and welded to each other, the annular body contacts the lower surface of the first sealing ring, and the first annular groove is filled with a first high-temperature resistant sealant. The upper end face and the lower end face of the first high-temperature resistant sealant are respectively sealed with the upper surface of the top cover plate and the lower surface of the aluminum pole.

[0014] According to the double-sealed battery top cover assembly described above, it also includes a first pole body, a second pole body, a second upper insulating member and a second sealing ring; the first pole body includes a second convex bump and a limiter located on the outer periphery of the second convex bump, the second upper insulating member is fitted on the upper surface of the area with the second assembly hole on the top cover plate, the second upper insulating member is provided with a second accommodating hole and a second annular through groove arranged around the second accommodating hole, the second sealing ring is fitted on the lower surface of the area with the second assembly hole on the top cover plate, and the inner hole of the second sealing ring is arranged corresponding to the second assembly hole; the second convex bump is provided with a second annular groove around the second accommodating hole, and the second sealing ring is fitted on the lower surface of the area with the second assembly hole on the top cover plate, and the inner hole of the second sealing ring is provided corresponding to the second assembly hole; the second convex bump is provided with a second annular groove around the second annular groove The limiting bodies are combined with each other to form a first pole body of an integrated structure, and the first pole body and the second pole body are both made of aluminum; the second bulge is passed through the second assembly hole, the second accommodating hole and the inner hole of the second sealing ring, the upper surface of the limiting body is fitted with the lower surface of the second sealing ring, the second pole body is fitted with the upper surface of the second upper insulating member and the top surface of the second bulge, and at least part of the second pole body is welded and fixed to the top surface of the second bulge, the second annular groove is filled with a second high-temperature resistant sealant, and the upper surface and lower surface of the second high-temperature resistant sealant are respectively sealed with the top cover plate and the second pole body.

[0015] 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 arranged around the inner ring body, and the inner circumferential wall of the outer ring body is connected to the outer circumferential wall of the inner ring body by a connector; a first annular through groove is formed between the inner circumferential wall of the outer ring body in the first upper insulating member and the outer circumferential wall of the inner ring body, and a first accommodating 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 circumferential wall of the outer ring body in the second upper insulating member and the outer circumferential wall of the inner ring body, and a second accommodating hole corresponding to the position of the second assembly hole is formed on the inner ring body of the second upper insulating member.

[0016] According to the double-sealed battery top cover assembly described above, at least one injection hole is provided on the aluminum pole and the second pole body. The injection hole of the aluminum pole is arranged corresponding to the local position of the first annular groove, and the injection hole of the second pole body is arranged corresponding to the local position of the second annular groove. The first high-temperature resistant sealant is completely filled into the first annular groove and solidified after passing through the injection hole of the aluminum pole in a fluid state. The second high-temperature resistant sealant is completely filled into the second annular groove and solidified after passing through the injection hole of the second pole body in a fluid state.

[0017] According to the double-sealed battery top cover assembly described above, the aluminum pole and the second pole body both include a first aluminum sheet and a second aluminum sheet stacked on each other and welded to each other, and injection holes corresponding to each other are provided on the first aluminum sheet and the second aluminum sheet; the first aluminum sheet of the aluminum pole is welded to the conductive plate, and the first aluminum sheet of the second pole body is welded to the top of the second convex bump, a conductive convex is provided on the upper surface of the second aluminum sheet, and injection holes corresponding to each other are provided on the first aluminum sheet and the second aluminum sheet.

[0018] According to the double-sealed battery top cover assembly described above, the upper surface of the area having the first assembly hole and the second assembly hole on the top cover plate is formed with continuous or discontinuous ribs, and the inner wall of each rib is surrounded on the upper surface of the top cover plate to form a positioning space, and the first upper insulating member and the second upper insulating member are respectively fitted in each positioning space.

[0019] According to the double-sealed battery top cover assembly described above, the upper surface edge of the outer ring body is formed with a continuously or intermittently arranged positioning protrusion, and the inner wall of the positioning protrusion abuts against the outer peripheral wall of the second pole body; the outer wall of the positioning protrusion is formed with a continuously or intermittently arranged protrusion, and the lower surface of the protrusion abuts against the upper end face of the rib.

[0020] According to the double-sealed battery top cover assembly described above, an extension ring is extended on the inner side of the inner ring body, and an annular filling body is extended downward on the lower surface of the extension ring. The annular filling body 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 filling body 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 bump. At least one cover plate is formed on the inner wall of the extension ring of the first upper insulating member, and the cover plate is correspondingly located in the fixing hole to cover the fixing convex.

[0021] According to the 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.

[0022] According to the double-sealed battery top cover assembly described above, it also includes a lower insulating member, which is fitted on the lower surface of the top cover plate. The opposite sides of the limiting body and the opposite sides of the annular body are also formed with locking protrusions. There is a position difference between the locking protrusions and the corresponding connecting ears, so that the locking protrusions are locked in the locking grooves of the lower insulating member. The limiting body and the annular body also abut against the lower surface of the lower insulating member.

[0023] The double-sealed battery top cover assembly described in the present invention has the following beneficial effects:

[0024] 1. The copper-aluminum pole and the aluminum pole are assembled at the first assembly hole of the top cover plate through the first sealing ring and the first high-temperature resistant sealant, and the first pole and the second pole are assembled at the second assembly hole of the top cover plate through the second sealing ring and the second high-temperature resistant sealant, so that the copper-aluminum pole and the aluminum pole are both sealed and installed between the top cover plate, and the first pole and the second pole are also sealed and installed between the top cover plate, thereby realizing double sealing installation, making the sealing more reliable. At the same time, the first high-temperature resistant sealant and the second high-temperature resistant sealant both adopt high-temperature resistant A / B glue, which has the characteristic of withstanding high temperatures. Therefore, when a short-circuit test is performed on a battery having the battery top cover assembly of the present invention, neither the first high-temperature resistant sealant nor the second high-temperature resistant sealant will burn, ensuring that no leakage occurs under the short-circuit test.

[0025] 2. The aluminum pole and the second pole body are both composed of a first aluminum sheet and a second aluminum sheet welded together, and the thickness of the first aluminum sheet and the second aluminum sheet is relatively small. Therefore, a smaller tonnage punching machine 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.

[0026] 3. The copper conductor and the aluminum conductor are fixed by welding and riveting, which makes the fixed connection between the copper conductor and the aluminum conductor more reliable and improves the connection stability between the two.

[0027] 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 structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of the battery top cover assembly.

[0029] Figure 2 This is a full cross-sectional view of the battery top cover assembly.

[0030] Figure 3 This is a partial structural cross-sectional view of the battery top cover assembly (1).

[0031] Figure 4 This is a partial structural cross-sectional view of the battery top cover assembly (2).

[0032] Figure 5 It is a structural schematic diagram of the negative electrode structure of the battery top cover assembly.

[0033] Figure 6 It is a structural schematic diagram of the positive electrode structure of the battery top cover assembly.

[0034] Figure 7 is an exploded view of the battery top cover assembly.

[0035] Figure 8 It is a three-dimensional view of the front of the battery top cover assembly.

[0036] Figure 9 This is a perspective view of the back of the battery top cover assembly.

[0037] Figure 10 It is a schematic diagram of the structure of a copper conductor (I).

[0038] Figure 11 It is a structural diagram of an aluminum conductor.

[0039] Figure 12 It is a structural diagram of the first pole.

[0040] Figure 13 is an exploded view of the first upper insulating member.

[0041] Figure 14 Schematic diagram of the structure of the first upper insulating member.

[0042] Figure 15 is an exploded view of the second upper insulating member.

[0043] Figure 16 Schematic diagram of the structure of the second upper insulating member.

[0044] Figure 17 It is a schematic diagram of the structure of a copper conductor (II).

[0045] Reference numerals: 1, top cover plate; 11, first assembly hole; 12, second assembly hole; 13, convex rib; 14, positioning space; 15, bevel;

[0046] 2. Lower insulating member; 21. Position limiting groove; 22. Positioning groove; 23. Position limiting convex portion; 24. Inner concave;

[0047] 100, negative electrode structure; 110, copper-aluminum pole; 120, aluminum pole; 130, first upper insulator; 140, first sealing ring; 150, first high-temperature-resistant sealant; 111, copper conductor; 112, aluminum conductor; 113, first convex bump; 114, annular body; 115, conducting plate; 116, retaining portion; 117, fixing hole; 118, fixing protrusion; 119, locking protrusion; 121, first aluminum sheet; 122, second aluminum sheet; 123, conductive protrusion; 124, injection hole;

[0048] 200, positive electrode structure; 210, first pole column; 220, second pole column; 230, second upper insulating member; 240, second sealing ring; 250, second high-temperature resistant sealant; 211, second convex bump; 212, stopper; 213, cavity; 214, connecting ear; 235, second annular groove;

[0049] 131. Outer ring body; 132. Inner ring body; 133. Positioning protrusion; 134. Protrusion; 135. First annular groove; 136. Extension ring; 137. Annular filling body; 138. Cover plate; 139. First receiving hole; 141. Connector; 231. Second receiving hole. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention are within the scope of protection of the present invention.

[0051] Example:

[0052] 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. The top cover plate 1 is provided with a first assembly hole 11 and a second assembly hole 12 for the positive electrode structure 200 and the negative electrode structure 100 to be adapted and installed respectively. The negative electrode structure 100 includes a copper-aluminum electrode 110, a first upper insulating member 130, a first sealing ring 140 and an aluminum electrode 120. The positive electrode structure 200 includes a first electrode body 210, a second electrode body 220, a second upper insulating member 230 and a second sealing ring 240.

[0053] 1. Assembly of the negative electrode structure 100:

[0054] like Figure 2 、 Figure 3 、 Figure 5 、 Figure 7 、 Figure 8 and Figure 17As shown, the copper-aluminum pole 110 includes a copper conductor 111 and an aluminum conductor 112, the copper conductor 111 includes a first convex 113 and a ring body 114 arranged on the outer periphery of the first convex 113, the aluminum conductor 112 includes a conducting plate 115, and a continuous or spaced enclosure 116 arranged on the outer periphery of the conducting plate 115. The continuously arranged enclosure 116 is an annular structure enclosure 116, and the intermittently arranged enclosure 116 is a plurality of enclosures 116 spaced from each other and arranged in an annular shape. The conducting plate 115 is fitted on the first convex 113. The top surface, and the two are welded and fixed to each other, the enclosure 116 is covered on the outer periphery of the first convex bulge 113, and the enclosure 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, the fixing holes 117 are generally provided in plurality, and the outer side of each fixing hole 117 on the first convex bulge 113 is riveted to form a fixing bulge 118, and the fixing bulge 118 is pressed on the lower inner wall of the fixing hole 117, so that the first convex bulge 113 and the aluminum conductor 112 are combined with each other to form a pole part.

[0055] The first upper insulating member 130 is fitted onto 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 accommodating hole 139 and a first annular through groove 135 arranged around the first accommodating hole 139. The first upper insulating member 130 is made of plastic material, and the shape of the first upper insulating member 130 can be square or round, but in this embodiment, a square shape is preferably used.

[0056] The first sealing ring 140 is fitted 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 fluororubber.

[0057] The aluminum pole 120 is located above the first assembly hole 11 ; the aluminum pole 120 may be square or circular in shape, but a square shape is preferred in this embodiment.

[0058] When the negative electrode structure 100 is assembled in the first assembly hole 11, the pole portion of the copper-aluminum pole 110 passes through the first sealing ring 140 and is accommodated in the first accommodating hole 139. The aluminum pole 120 is fitted on the upper surface of the first upper insulating member 130 so that at least part of the conducting plate 115 and at least part of the aluminum pole 120 are fitted together and welded to each other. The annular body 114 contacts the lower surface of the first sealing ring 140. The first annular groove 135 is filled with a first high-temperature resistant sealant 150. The upper end face and lower end face of the first high-temperature resistant sealant 150 are sealed and engaged with the upper surface of the top cover plate 1 and the lower surface of the aluminum pole 120, respectively.

[0059] 2. Assembly of the positive electrode structure 200:

[0060] like Figure 2 、 Figure 4 、 Figure 6-Figure 8 As shown, the first pole body 210 includes a second convex hump 211 and a limiting body 212 located on the outer periphery of the second convex hump 211. The second upper insulating member 230 is fitted on the upper surface of the area on the top cover plate 1 having the second assembly hole 12. The second upper insulating member 230 is provided with a second accommodating hole 231 and a second annular through groove 235 provided around the second accommodating hole 231. The second sealing ring 240 is fitted on the lower surface of the area on the top cover plate 1 having the second assembly hole 12. The inner hole of the second sealing ring 240 is provided corresponding to the second assembly hole 12. The second upper insulating member 230 is made of plastic material, and the shape of the second upper insulating member 230 can be square or round, but in this embodiment, a square shape is preferably used. The second sealing ring 240 is made of fluororubber material. The shape of the second pole body 220 can be square or round, but in this embodiment, a square shape is preferably used.

[0061] When the positive electrode structure 200 is assembled in the second assembly hole 12, the second convex bulge 211 and the limiting body 212 are combined with each other to form a first pole body 210 of an integrated structure, and the first pole body 210 and the second pole body 220 are both made of aluminum; the second convex bulge 211 is inserted into the second assembly hole 12, the second accommodating hole 231 and the inner hole of the second sealing ring 240, the upper surface of the limiting body 212 is fitted with the lower surface of the second sealing ring 240, the second pole body 220 is fitted with the upper surface of the second upper insulating member 230 and the top surface of the second convex bulge 211, and at least part of the second pole body 220 is welded and fixed to the top surface of the second convex bulge 211, the second annular groove 235 is filled with a second high-temperature resistant sealant 250, and the upper surface and lower surface of the second high-temperature resistant sealant 250 are respectively sealed with the top cover plate 1 and the second pole body 220.

[0062] like Figure 2-Figure 8As shown, preferably, at least one injection hole 124 is provided on the aluminum pole 120 and the second pole body 220. The injection hole 124 of the aluminum pole 120 is arranged corresponding to the local position of the first annular groove 135, and the injection hole 124 of the second pole body 220 is arranged corresponding to the local position of the second annular groove 235. The first high-temperature resistant sealant 150 is completely filled into the first annular groove 135 and solidified after passing through the injection hole 124 of the aluminum pole 120 in a fluid state. The second high-temperature resistant sealant 250 is completely filled into the second annular groove 235 and solidified after passing through the injection hole 124 of the second pole body 220 in a fluid state. There can be multiple injection holes 124, which makes it more efficient to inject the fluid-like first high-temperature resistant sealant 150 and the second high-temperature resistant sealant 250. Generally, the first high-temperature resistant sealant 150 and the second high-temperature resistant sealant 250 are made of high-temperature resistant A / B glue specially used in the automobile manufacturing industry. The cured high-temperature resistant A / B glue has the characteristic of withstanding high temperatures. Therefore, when a short-circuit test is performed on a battery having the battery top cover assembly of the present invention, the first high-temperature resistant sealant 150 and the second high-temperature resistant sealant 250 will not burn, ensuring that no leakage occurs during the short-circuit test.

[0063] In this embodiment, Figure 2-Figure 6 、 Figure 13-16 As 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, and the inner peripheral wall of the outer ring body 131 and the outer peripheral wall of the inner ring body 132 are connected by a connecting body 141; a first annular through groove 135 is formed between the inner peripheral wall of the outer ring body 131 in the first upper insulating member 130 and the outer peripheral wall of the inner ring body 132, 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; the second upper insulating member 130 includes a plurality of inner ring bodies 131 and 132, and a plurality of outer ring bodies 131 and 132 are connected to each other through a connecting body 141; A second annular through groove 235 is formed between the inner circumferential wall of the outer ring body 131 in the part 230 and the outer circumferential wall of the inner ring body 132, and a second accommodating 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 part 230; wherein the inner ring body 132, the outer ring body 131 and the connecting body 141 are all made of plastic material, and the three are combined with each other into an integrated structure. In order to make the connection strength between the inner ring body 132 and the outer ring body 131 better, the number of connecting bodies 141 can be set to multiple and distributed at intervals.

[0064] Preferably, the upper surface edge of the outer ring body 131 forms a continuous or discontinuous positioning protrusion 133, the continuously arranged positioning protrusion 133 is a positioning protrusion 133 with an annular structure, and the discontinuously arranged positioning protrusion 133 is a plurality of positioning protrusions 133 spaced apart from each other and arranged in a ring shape, and the inner wall of the positioning protrusion 133 abuts against the outer peripheral wall of the second pole body 220; its structural setting is mainly used to position the second pole body 220 and the aluminum pole 120.

[0065] Further preferably, the outer wall of the positioning protrusion 133 is formed with a continuous or intermittent protrusion 134, the lower surface of the protrusion 134 abuts against the upper end surface of the rib 13, the continuously arranged protrusion 134 is a protrusion 134 with an annular structure, and the intermittently arranged protrusion 134 is a plurality of protrusions 134 spaced from each other and arranged in a ring shape, and its structural arrangement covers the rib 13 to protect the rib 13.

[0066] Preferably, the inner side of the inner ring body 132 extends to form an extension ring 136, 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 hump 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 convexity 118. Its structural setting makes the positioning of the upper insulating member more reliable, thereby improving the compactness and stability of the pole after installation.

[0067] In this embodiment, Figure 2-Figure 7As shown, the aluminum pole 120 and the second pole body 220 both include a first aluminum sheet 121 and a second aluminum sheet 122 stacked and welded together, and corresponding injection holes 124 are provided on the first aluminum sheet 121 and the second aluminum sheet 122; the first aluminum sheet 121 of the aluminum pole 120 is welded to the conductive plate 115, and the first aluminum sheet 121 of the second pole body 220 is welded to the top of the second convex bump 211, and a conductive convex 123 is provided on the upper surface of the second aluminum sheet 122, and corresponding injection holes 124 are provided on the first aluminum sheet 121 and the second aluminum sheet 122. Among them, the welding method 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 conductive plate 115 of the aluminum conductor 112 is ultrasonic welding or laser welding. When welding the aluminum pole 120 on the aluminum conductor 112, the first aluminum sheet 121 is first stacked on the top surface of the conductive plate 115 of the aluminum conductor 112, and then the welding energy is applied to the first aluminum sheet 121, so as to perform ultrasonic or laser energy penetration welding, so that the conductive plate 115 and the first aluminum sheet 121 are welded and fixed. Finally, the second aluminum sheet 122 is stacked on the top surface of the first aluminum sheet 121. At this time, the welding energy acts on the second aluminum sheet 12 2, thereby performing deep penetration welding of ultrasonic or laser energy, so that the first aluminum sheet 121 and the second aluminum sheet 122 are welded and fixed; when welding the second pole body 220 on the second convex hump 211, first stack the first aluminum sheet 121 on the top surface of the second convex hump 211, and then the welding energy acts on the first aluminum sheet 121, thereby performing deep penetration welding of ultrasonic or laser energy, so that the second convex hump 211 and the first aluminum sheet 121 are welded and fixed, and finally the second aluminum sheet 122 is stacked on the top surface of the first aluminum sheet 121, and at this time the welding energy acts on the second aluminum sheet 122, thereby performing deep penetration welding of ultrasonic or laser energy, so that the first aluminum sheet 121 and the second aluminum sheet 122 are welded and fixed.

[0068] Furthermore, a conductive protrusion 123 is provided on the upper surface of the second aluminum sheet 122 . The provision of the conductive protrusion 123 facilitates conductive connection of the battery's electronic control system.

[0069] In this embodiment, Figure 7 and Figure 8As shown, the upper surface of the area having the first assembly hole 11 and the second assembly hole 12 on the top cover plate 1 is formed with continuous or discontinuous ribs 13. The continuously arranged ribs 13 are ribs 13 with an annular structure, and the discontinuously arranged ribs 13 are multiple ribs 13 spaced apart from each other and arranged in an annular shape. The inner wall of each rib 13 is formed on the upper surface of the top cover plate 1 to form a positioning space 14, and the first upper insulating member 130 and the second upper insulating member 230 are respectively fitted in each positioning space 14; wherein, the ribs 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 small after inflation, and at the same time, each rib 13 positions the first upper insulating member 130 and the second upper insulating member 230 respectively.

[0070] In this embodiment, Figure 5-Figure 7 、 Figure 9 、 Figure 10 and Figure 12 As shown, connecting ears 214 are integrally formed on the opposite sides of the limiting body 212 and the opposite sides of the annular body 114. The connecting ears 214 are mainly welded and fixed to the pole ears of the battery cell. Its structural setting makes it easier to weld the connecting ears 214 to the pole ears of the battery cell, simplifies the pole ear welding process, and improves the work efficiency of assembling the battery top cover assembly to the battery.

[0071] In this embodiment, Figure 9 As shown, it also includes a lower insulating member 2, which is fitted on the lower surface of the top cover plate 1. The opposite sides of the limiting body 212 and the opposite sides of the annular body 114 are further formed with locking protrusions 119. There is a position difference between the locking protrusions 119 and the corresponding connecting ears 214, so that the locking protrusions 119 are locked in the locking 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; its structural arrangement ensures that the limiting body 212 and the annular body 114 are more reliably insulated from the top cover plate 1. At the same time, the locking protrusion 119 is locked in the locking groove 22 of the lower insulating member 2, so that the first pole body 210 is more stably installed on the top cover plate 1. The locking protrusion 119 is radially arranged on the limiting body 212 and the annular body 114, and the limiting body 212 and the annular body 114 are respectively placed in the limiting grooves 21 on the lower surface of the lower insulating member 2. The limiting groove 21 has two opposite inner walls provided with limiting protrusions 23. The outer side of the limiting body 212 is sunken into the inner recess 24 of the limiting protrusion 23. The other two opposite inner walls in the limiting groove 21 are provided with locking grooves 22.

[0072] Finally, the continuously or discontinuously arranged ribs 13, the outer shape of the outer ring body 131 and the continuously or discontinuously arranged positioning protrusions 133 are all arranged in a square shape, so that after the first upper insulating member 130 is positioned in a positioning space 14 and the aluminum pole 120 is positioned in a space formed by a positioning protrusion 133, the bevel 15 of the aluminum pole 120 corresponds to the bevel 15 of the space formed by the positioning protrusion 133, and the bevel 15 of the positioning space 14 corresponds to the bevel 15 on the outer ring body 131 of the first upper insulating member 130. The second upper insulating member 230 is positioned in another After positioning in the positioning space 14 and the second pole body 220 is positioned in the space formed by another positioning protrusion 133, the bevel 15 of the second pole body 220 is correspondingly matched with the bevel 15 of the space formed by another positioning protrusion 133, and the bevel 15 of the other positioning space 14 is correspondingly matched with the bevel 15 on the outer ring body 131 of the second upper insulating member 230. The above-mentioned structure can prevent the assembled pole and the upper insulating member from rotating, and a cavity 213 is provided on the first convex bulge 113 of the copper conductor 111 and the second convex bulge 211 of the first pole body 210.

Claims

1. A double-sealed battery top cover assembly, characterized in that: include: A top cover plate (1), wherein a first assembly hole (11) is provided on the top cover plate (1); A copper-aluminum pole (110) comprising a copper conductor (111) and an aluminum conductor (112), wherein the copper conductor (111) comprises a first convex bump (113) and a ring body (114) arranged on the outer periphery of the first convex bump (113), and the aluminum conductor (112) comprises a conducting plate (115) and a continuous or spaced enclosure (116) arranged on the outer periphery of the conducting plate (115), wherein the conducting plate (115) is arranged in contact with the first convex bump (113). 3), and the two are welded and fixed to each other, the enclosure portion (116) covers the outer periphery of the first convex bulge (113), the enclosure portion (116) is provided with at least one fixing hole (117), and the outer portion of the first convex bulge (113) located at the fixing hole (117) is formed with a fixing bulge (118), and the fixing bulge (118) is pressed on the lower inner wall of the fixing hole (117), so that the first convex bulge (113) and the aluminum conductor (112) are combined with each other to form a pole portion; a first upper insulating member (130), the first upper insulating member (130) being arranged in contact with an upper surface of the top cover plate (1) in an area having a 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 an area having a first assembly hole (11); an aluminum pole (120), the aluminum pole (120) being located above the first assembly hole (11); The pole portion of the copper-aluminum pole (110) passes through the first sealing ring (140) and is accommodated in the first accommodating hole (139); the aluminum pole (120) is arranged in contact with the upper surface of the first upper insulating member (130), so that at least a portion of the conductive plate (115) and at least a portion of the aluminum pole (120) are mutually attached and welded and fixed to each other; the annular body (114) contacts the lower surface of the first sealing ring (140); the first annular groove (135) is filled with a first high-temperature resistant sealant (150); the upper end surface and the lower end surface of the first high-temperature resistant sealant (150) are respectively sealed and engaged with the upper surface of the top cover plate (1) and the lower surface of the aluminum pole (120); It also includes a first pole column (210), a second pole column (220), a second upper insulating member (230), and a second sealing ring (240); The first pole column (210) includes a second convex bump (211) and a limiting body (212) located on the periphery of the second convex bump (211); the second upper insulating member (230) is fitted on the upper surface of the area having the second assembly hole (12) on the top cover plate (1); the second upper insulating member (230) is provided with a second accommodating hole (231) and a second annular through groove (235) arranged around the second accommodating hole (231); the second sealing ring (240) is fitted on the lower surface of the area having the second assembly hole (12) on the top cover plate (1); the inner hole of the second sealing ring (240) is arranged corresponding to the second assembly hole (12); the second convex bump (211) and the limiting body (212) are combined with each other to form a first pole column (210) of an integrated structure, and the first pole column (210) and the second pole column (220) are both made of aluminum; The second convex bump (211) is inserted into the second assembly hole (12), the second accommodating hole (231) and the inner hole of the second sealing ring (240); the upper surface of the limiting body (212) is fitted with the lower surface of the second sealing ring (240); the second pole body (220) is fitted with the upper surface of the second upper insulating member (230) and the top surface of the second convex bump (211); at least a portion of the second pole body (220) is welded and fixed to the top surface of the second convex bump (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 sealed and joined to the top cover plate (1) and the second pole body (220) respectively.

2. A double-sealed battery top cover assembly according to claim 1, characterized in that: The first upper insulating member (130) and the second upper insulating member (230) comprise an inner ring body (132) and an outer ring body (131) arranged around the inner ring body (132), wherein the inner peripheral wall of the outer ring body (131) and the outer peripheral wall of the inner ring body (132) are connected via a connecting body (141); A first annular through groove (135) is formed between the inner circumferential wall of the outer ring body (131) in the first upper insulating member (130) and the outer circumferential wall of the inner ring body (132), and a first accommodating 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 circumferential wall of the outer ring body (131) in the second upper insulating member (230) and the outer circumferential wall of the inner ring body (132), and a second accommodating 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).

3. A double-sealed battery top cover assembly according to claim 1, characterized in that: At least one injection hole (124) is provided on each of the aluminum pole (120) and the second pole body (220). The injection hole (124) of the aluminum pole (120) is provided corresponding to a local position of the first annular through groove (135), and the injection hole (124) of the second pole body (220) is provided corresponding to a local 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 solidified after passing through the injection hole (124) of the aluminum pole (120) in a fluid state. The second high-temperature resistant sealant (250) is completely filled into the second annular through groove (235) and solidified after passing through the injection hole (124) of the second pole body (220) in a fluid state.

4. A double-sealed battery top cover assembly according to claim 3, characterized in that: The aluminum pole (120) and the second pole body (220) both comprise a first aluminum sheet (121) and a second aluminum sheet (122) that are stacked and welded together, and injection holes (124) corresponding to each other are provided on the first aluminum sheet (121) and the second aluminum sheet (122); the first aluminum sheet (121) of the aluminum pole (120) is welded together with the conductive plate (115), and the first aluminum sheet (121) of the second pole body (220) is welded together with the top of the second convex bump (211), and the upper surface of the second aluminum sheet (122) is provided with a conductive bump (123), and the first aluminum sheet (121) and the second aluminum sheet (122) are provided with injection holes (124) corresponding to each other.

5. A double-sealed battery top cover assembly according to claim 2, characterized in that: The upper surface of the region having the first assembly hole (11) and the second assembly hole (12) on the top cover plate (1) is formed with continuous or discontinuous convex ribs (13), and the inner wall of each convex rib (13) is surrounded on the upper surface of the top cover plate (1) to form a positioning space (14), and the first upper insulating member (130) and the second upper insulating member (230) are respectively fitted in each positioning space (14).

6. A double-sealed battery top cover assembly according to claim 5, characterized in that: The upper surface edge of the outer ring body (131) is formed with a continuously or discontinuously arranged positioning protrusion (133), and the inner wall of the positioning protrusion (133) abuts against the outer peripheral wall of the second pole body (220); the outer wall of the positioning protrusion (133) is formed with a continuously or discontinuously arranged protrusion (134), and the lower surface of the protrusion (134) abuts against the upper end surface of the rib (13).

7. A double-sealed battery top cover assembly according to claim 6, characterized in that: An extension ring (136) is extended from the inner side of the inner ring body (132), and an annular filling body (137) is extended 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). 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 bulge (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 bulge (118).

8. A double-sealed battery top cover assembly according to any one of claims 2 to 7, characterized in that: Connecting ears (214) are formed on opposite sides of the limiting body (212) and opposite sides of the annular body (114).

9. A double-sealed battery top cover assembly according to claim 8, characterized in that: The lower insulating member (2) is also included. The lower insulating member (2) is fitted on the lower surface of the top cover plate (1). The opposite sides of the limiting body (212) and the opposite sides of the annular body (114) are also formed with locking protrusions (119). There is a position difference between the locking protrusions (119) and the corresponding connecting ears (214), so that the locking protrusions (119) are locked in the locking grooves (22) of the lower insulating member (2). The limiting body (212) and the annular body (114) are also in contact with the lower surface of the lower insulating member (2).

Images