New energy battery top cover with high safety

Abstract

The utility model discloses a new energy battery top cover with high safety, which consists of a cover plate body, a lower plastic bracket, two pole components, two upper plastic fixing pieces, two sealing rings, two pins, an explosion-proof valve and an explosion-proof valve protection patch, and the sealing rings, the two upper plastic fixing pieces and the two pole components are distributed at two ends of the cover plate body. The top of the pole assembly is higher than the top of the cover plate body. Compared with an existing riveting top cover structure with the pins, riveting aluminum blocks are reduced, the number of structural parts is reduced, the cost is reduced, the pole columns are directly riveted, welded and fixed with the pins, the riveting and welding frequency is reduced, meanwhile, the internal resistance of a battery cell is reduced, the part structure of the top cover is simplified, and the weight of the structural parts is reduced; meanwhile, the space occupancy rate of internal structural parts of the battery is reduced, the overall space utilization rate of the battery is improved, and the battery capacity is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power battery top covers, in particular to a new energy battery top cover with high safety. Background Art

[0002] As the main power source of new energy vehicles, power batteries have become one of the key components of electric vehicles. In the existing technology of square battery top covers, pins are set at the bottom of the top cover, which are bent and fixed to the bottom of the pole by riveting and welding. The pins are perpendicular to the upper end surface of the cover. The current square battery top cover with pins requires both the upper and lower ends of the pole to be fixed by riveting and welding. The resistance of the top cover will be greater, and the eccentric structure of the riveting block and the pole will cause the riveting block to warp, resulting in the risk of over-tolerance of important characteristic dimensions, which reduces the safety of new energy batteries during use. Its structure directly affects the reliability and manufacturing cost of the battery pack.

[0003] Based on the above problems, it is necessary to design a new energy battery top cover with reliable structure, simple manufacturing process and low cost to improve the energy density of new energy batteries and reduce manufacturing costs. Utility Model Content

[0004] In order to solve the problems existing in the above-mentioned existing top cover structure, the utility model provides a new energy battery top cover with high safety which helps to improve the assembly efficiency of the top cover and reduce the production cost, and improve the energy density and safety of the new energy battery.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A new energy battery top cover with high safety is composed of a cover body, a lower plastic bracket, a pole assembly, an upper plastic fixing, a sealing ring, a pin, an explosion-proof valve, and an explosion-proof valve protection patch. The sealing ring, the upper plastic fixing, and the pole assembly are each two in number and are distributed at both ends of the cover body. The top of the pole assembly is higher than the highest point of the upper surface of the cover body.

[0007] Preferably, both ends of the cover body are provided with a first groove and a first through hole located in the first groove; the first bosses at both ends of the lower plastic bracket pass through the first through holes on the back side of the cover body and are assembled with the back side of the cover body.

[0008] Preferably, the pole assembly consists of a conductive block at the top, a second boss at the bottom and a third boss at the bottom. The pole assembly is installed in an upper plastic fixing, and the second boss and the third boss pass through a second through hole on the upper plastic fixing. The back side of the conductive block is attached to the upper plastic fixing, and the inner hole on the sealing ring is combined with the second boss to form a sealing structure.

[0009] Preferably, the pin is engaged with three positioning bosses on the lower plastic bracket through three positioning grooves; the third boss on the pole column assembly passes through the third through hole and the third groove on the pin, and the end of the third boss is in close contact with the end of the fourth boss on the pin; the sealing ring is located between the reverse side of the conductive block of the pole column assembly and the first groove, and the sealing ring is compressed to a required thickness to play a role in sealing the top cover.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: Compared with the existing structure of riveting the top cover with pins, the present utility model reduces the riveted aluminum block, reduces the number of structural parts, and reduces the cost. The pole column is directly riveted and welded to the pin, reducing the number of riveting and welding times. At the same time, it also reduces the internal resistance of the battery cell, simplifies the structure of the top cover parts, reduces the weight of the structural parts, reduces the space occupancy rate of the internal structural parts of the battery, improves the overall space utilization rate of the battery, further increases the battery capacity, and is assembled into a component through stamping, injection molding, riveting, laser welding, which simplifies the process flow and is suitable for large-scale automated production. Especially for the pin, on the basis of the unchanged volume, the contact area after riveting the pin and the pole column is increased through the stamping and flanging process, which can improve the ability of the pole column to withstand the pushing and pulling force in the Z direction and improve the safety of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the outer surface of an embodiment of the present utility model;

[0012] Figure 2 is Figure 1 the cross-sectional structural diagram of A-A in

[0013] Figure 3 is the enlarged schematic diagram of B in 2;

[0014] Figure 4 is the three-dimensional structural exploded diagram of an embodiment of the present utility model;

[0015] Figure 5 is the three-dimensional structural diagram of the cover plate body of an embodiment of the present utility model;

[0016] Figure 6 is the reverse three-dimensional structural diagram of the cover plate body and the lower plastic bracket of an embodiment of the present utility model;

[0017] Figure 7 is the reverse three-dimensional structural diagram of the pole column assembly and its combination with the upper plastic fixing part and the sealing ring of an embodiment of the present utility model;

[0018] Figure 8 is the reverse three-dimensional structural diagram of the pole column assembly combined with the cover plate body and the lower plastic bracket of an embodiment of the present utility model;

[0019] Figure 9This is a schematic diagram of the structure of the pin and its cross section of an embodiment of the utility model;

[0020] Figure 10 It is a schematic diagram of the reverse three-dimensional structure of the pole assembly, cover body, lower plastic bracket and pin assembly of the embodiment of the utility model.

[0021] In the figure: 1. cover body, 101. first groove, 102. first through hole, 2. lower plastic bracket, 201. first boss, 202. second through hole, 203. positioning boss, 3. pole assembly, 301. conductive block, 302. second boss, 303. third boss, 4. upper plastic fixing part, 401. second groove, 402. second through hole, 5. sealing ring, 501. inner hole, 6. pin, 601. fourth boss, 602. positioning groove, 603. third through hole, 604. third groove, 7. explosion-proof valve, 8. explosion-proof valve protection patch. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] like Figures 1 to 10 As shown, the embodiment of the utility model is composed of a cover body 1, a lower plastic bracket 2, a pole assembly 3, an upper plastic fixing part 4, a sealing ring 5, a pin 6, an explosion-proof valve 7, and an explosion-proof valve protection patch 8. The sealing ring 5, the upper plastic fixing part 4, and the pole assembly 3 are each two in number, distributed at both ends of the cover body 1, and the top of the pole assembly 3 is higher than the highest point of the upper surface of the cover body 1; the upper plastic fixing part 4 serves to achieve insulation or semi-conduction function between the pole assembly 3 and the cover body 1, and the lower plastic bracket 2 is installed at the bottom of the cover body 1 to isolate the battery top cover from the battery cell.

[0025] Both ends of the cover body 1 are provided with a first groove 101 and a first through hole 102 in the first groove 101 ; the first bosses 201 at both ends of the lower plastic bracket 2 pass through the first through holes 102 on the back side of the cover body 1 and are assembled with the back side of the cover body 1 .

[0026] The pole column assembly 3 is composed of a conductive block 301 at the top, a second boss 302 at the bottom, and a third boss 303 at the bottom. The pole column assembly 3 is installed in the upper plastic fixing member 4, and the second boss 302 and the third boss 303 pass through the second through hole 402 on the upper plastic fixing member 4. The reverse side of the conductive block 301 is attached to the upper plastic fixing member 4. The inner hole 501 on the sealing ring 5 is combined with the second boss 302 to form a sealing structure.

[0027] The pin 6 is matched with three positioning bosses 203 on the lower plastic bracket 2 through three positioning grooves 602. The third boss 303 on the pole column assembly 3 passes through the third through hole 603 and the third groove 604 on the pin 6, and then is fixed by riveting and welding. The end of the third boss 303 and the end of the fourth boss 601 on the pin 6 are closely attached. The sealing ring 5 is placed between the reverse side of the conductive block 301 of the pole column assembly and the first groove 101, and the sealing ring 5 is compressed to a required thickness to play a role in sealing the top cover.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new energy battery top cover with high safety, characterized in that: It consists of a cover body, a lower plastic bracket, a pole assembly, an upper plastic fixing, a sealing ring, a pin, an explosion-proof valve, and an explosion-proof valve protection patch. The number of the sealing ring, the upper plastic fixing, and the pole assembly is two, distributed at both ends of the cover body, and the top of the pole assembly is higher than the highest point of the upper surface of the cover body; the pin cooperates with the three positioning bosses on the lower plastic bracket through three positioning grooves; the third boss on the pole assembly passes through the third through hole and the third groove on the pin, and the end of the third boss is tightly fitted with the end of the fourth boss on the pin; the sealing ring is placed between the reverse side of the conductive block of the pole assembly and the first groove, so that the sealing ring is compressed to a certain required thickness, thereby playing the role of sealing the top cover.

2. The high-safety new energy battery top cover according to claim 1, characterized in that: Both ends of the cover body are provided with a first groove and a first through hole in the first groove; the first bosses at both ends of the lower plastic bracket pass through the first through holes on the back side of the cover body and are assembled with the back side of the cover body.

3. A new energy battery top cover with high safety according to claim 1, characterized in that: The pole assembly consists of a conductive block at the top, a second boss at the bottom and a third boss at the bottom. The pole assembly is installed in the upper plastic fixing, and the second boss and the third boss pass through the second through hole on the upper plastic fixing. The back side of the conductive block is attached to the upper plastic fixing, and the inner hole on the sealing ring is combined with the second boss to form a sealing structure.

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