Extrusion plastic aluminum row structure in new energy battery pack

Abstract

The utility model relates to the technical field of new energy battery packs, in particular to an extruded aluminum bar structure in a new energy battery pack, which comprises an extruded aluminum bar structure main body, an aluminum bar is arranged on the extruded aluminum bar structure main body, two ends of the aluminum bar are respectively and symmetrically connected with aluminum bar terminals, and the aluminum bar and the aluminum bar terminals are formed by extrusion molding and vertical bending. Two surfaces of the aluminum bar terminal are respectively welded with a nickel sheet, the aluminum bar terminal and the nickel sheets are punched, a PI film is formed outside the aluminum bar through high-temperature spraying, and an EVA heat-shrinkable sleeve is coated outside the aluminum bar. The extruded aluminum bar structure in the new energy battery pack adopts the extruded aluminum bar to replace a copper bar, so that the weight is effectively reduced while the high-voltage connection stability is ensured, the production cost is reduced, and the problem that the traditional copper bar is high in production cost is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery package technical field, concretely is a new energy battery package inside extruded aluminium row structure. BACKGROUND

[0002] With the development of new energy automobile industry, the power battery used by new energy automobile is gradually replacing the traditional energy consumption mode and entering our life. The power battery system is huge and complex, which is composed of single battery cell in series and parallel connection mode, and a whole set of battery system is composed of a plurality of good module. The high voltage connection in the battery pack usually adopts the form that the copper bar and the module are connected together through bolts, but with the change of new energy battery structure, the volume becomes larger and larger, and the outlet position of high voltage and low voltage also changes from one side to two sides, one end of which is high voltage and the other end is low voltage, which improves the safety performance. Therefore, the connection of copper bar needs to be connected from the head end to the tail end of the battery pack after the same side arrangement, the whole distance is large, the length of copper bar connection is long, which brings difficulties to production and transportation, and the cost of production is also higher than that of conventional copper bar.

[0003] Therefore, it is necessary to design a high voltage extruded aluminium row for connecting power battery module and other high voltage contact, which has simple structure, convenient installation, excellent safety performance after connection and price advantage. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a new energy battery package inside extruded aluminium row structure to solve the problem that the outlet position of high voltage and low voltage of new energy battery package in the market changes from one side to two sides, the distance of copper bar is large, which brings difficulties to production and transportation, and the cost of production is also higher than that of conventional copper bar.

[0005] In order to realize the above purpose, the utility model provides the following technical scheme: a new energy battery package inside extruded aluminium row structure, including extruded aluminium row structure main part, the extruded aluminium row structure main part is equipped with aluminium row, and the both ends of aluminium row are respectively connected with aluminium row terminal symmetrically, the aluminium row and aluminium row terminal all are through extruded vertical bending forming, and the both sides of aluminium row terminal are respectively welded with nickel sheet, and the aluminium row terminal and nickel sheet are punched, the outside of aluminium row is composed of PI film through high temperature spraying, and the outside of aluminium row is also covered with EVA heat shrink sleeve.

[0006] Preferably, the welding mode between the nickel sheet and the aluminium row adopts high molecular diffusion welding, and the welding of the nickel sheet satisfies the drawing force > 30N.

[0007] Preferably, the aluminium row is a hard state structure, and the cross-sectional dimension of the aluminium row is 17mm*3mm.

[0008] Preferably, the working temperature range of the PI film is between -250 DEG C and 400 DEG C.

[0009] Preferably, the voltage level of the EVA heat shrink sleeve is 900V DC, and the leakage current is less than 1mA under the condition of 3000V DC, 60s.

[0010] Preferably, the aluminum bar terminal and the aluminum bar also adopt polymer diffusion welding, and the welding between the aluminum bar terminal and the aluminum bar meets the pulling force > 1500N, the welding width between the aluminum bar terminal and the aluminum bar ranges from 21 to 30mm, and the welding overlap size between the aluminum bar terminal and the aluminum bar is 15-50mm.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1、 this new energy battery pack extruded aluminum row structure adopts extruded aluminum row instead of copper row, guarantees high pressure connection stability, effectively reduces weight, and reduces production cost, solves the problem of high production cost of traditional copper row.

[0013] 2、 this new energy battery pack extruded aluminum row structure is welded with nickel sheet through high polymer diffusion at both ends of the aluminum row, avoids the problem that the traditional aluminum foil cannot guarantee the torsion force of bolt fastening and is easy to break at the laminated bending part through the overcurrent mode of welding nickel sheet by multiple pieces of stacking.

[0014] 3、 this new energy battery pack extruded aluminum row structure effectively avoids the problem that the electromagnetic pulse welding process between the aluminum row and the copper row cannot electrochemically react. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the utility model of a new energy battery pack extruded aluminum row structure;

[0016] Figure 2 It is a new energy battery pack extruded aluminum row structure Figure 1 It is an enlarged structure schematic view of A place in the utility model;

[0017] Figure 3 It is an aluminum row and nickel sheet connection top view of the utility model of a new energy battery pack extruded aluminum row structure;

[0018] Figure 4 It is an aluminum row and nickel sheet connection three-dimensional structure schematic view of the utility model of a new energy battery pack extruded aluminum row structure;

[0019] Figure 5 It is an aluminum row and nickel sheet connection three-dimensional structure schematic view of the utility model of a new energy battery pack extruded aluminum row structure;

[0020] In the figure: 1, extruded aluminum row structure main body; 2, nickel sheet; 3, aluminum row; 301, PI film; 302, EVA heat shrink sleeve; 4, aluminum row wiring end. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figures 1-5The utility model provides a technical scheme: a new energy battery pack inner extruded aluminum row structure, including extruded aluminum row structure main body 1, be equipped with aluminum row 3 on extruded aluminum row structure main body 1, aluminum row 3 is hard state structure, and the cross section size of aluminum row 3 is 17mm * 3mm, this structure aluminum row 3 is hard state aluminum row and not aluminum foil, avoid the problem that traditional aluminum foil through the overcurrent mode of welding nickel piece of multiple pieces superimposed cannot guarantee the torsion of bolt fastening and the easy fracture of laminated bending, aluminum row 3 is horizontal and vertical, not easy to bend, make the assembly operation more simple, and aluminum row 3 is safe and reliable, and aluminum row 3 both ends are connected with aluminum row terminal 4 respectively, and aluminum row 3 and aluminum row terminal 4 all are through extruded vertical bending forming, and aluminum row terminal 4 and aluminum row 3 also adopt high polymer diffusion welding, and the welding between aluminum row terminal 4 and aluminum row 3 satisfies pull -out force > 1500N, and the welding width range between aluminum row terminal 4 and aluminum row 3 is 21-30mm, and the welding overlap size between aluminum row terminal 4 and aluminum row 3 is 15-50mm, this structure makes the stable connection between aluminum row terminal 4 and aluminum row 3, ensures the conductivity, and aluminum row terminal 4 both sides still weld with nickel piece 2 respectively, and aluminum row terminal 4 and nickel piece 2 are punched, and the electric connection treatment is handled through punching, and the outside of aluminum row 3 is formed PI film 301 through high temperature spraying, and the working temperature range of PI film 301 is between -250 DEG C and 400 DEG C, this structure PI film 301 has strong electrical insulation performance, has more excellent tensile and extrusion resistance, can satisfy the electrical insulation demand of extruded aluminum row structure main body 1, and the outside of aluminum row 3 also is covered with EVA heat shrink sleeve 302, and the voltage grade of EVA heat shrink sleeve 302 is 900V DC, satisfies 3000VDC, and the leakage current is <1mA under 60s condition, this structure can make EVA heat shrink sleeve 302 coat the area except nickel piece 2 on extruded aluminum row structure main body 1, protects extruded aluminum row structure main body 1, and the welding mode between nickel piece 2 and aluminum row 3 adopts high polymer diffusion welding, and the welding of nickel piece 2 satisfies pull -out force > 30N, this structure nickel piece 2 has good conductivity and corrosion resistance, makes aluminum row 3 can be connected with nickel piece 2, ensures the normal work of battery, and aluminum row 3 and aluminum row terminal 4 adopt AL T6101-T61 or AL T6101-T62, and the hardness of distribution is about 60, is close to 60% of copper, is not easy to break, and aluminum row 3 has the advantages of light weight and low cost compared with copper row, considering the use amount, under the condition of same current:

[0023] Set M aluminum = rho aluminum S aluminum L, M copper = rho copper S copper L

[0024] Then M copper / M aluminum = rho copper S copper L / rho aluminum S aluminum L

[0025] Since the conductivity of aluminum / copper is about 0.58, S aluminum = S copper / 0.58

[0026] ∴ Mcopper / Maluminum = 0.58pcopper / paluminum ≈ 1.9

[0027] Under the premise of passing the same current, the weight of copper used is approximately 1.91 times the weight of aluminum, and the use of aluminum can reduce the weight, and for the same reason, the price of each Kg of copper is nearly 3.5 times more expensive than aluminum, so, simply from the comparison of material prices, the price of a single copper row in the battery pack is approximately 6.65 times more expensive than an aluminum row.

[0028] Working principle: when using the new energy battery pack inner extruded aluminum row structure, first, the aluminum material is processed into a size of 17mm*3mm by extrusion, then the aluminum material is formed with a PI film 301 on the surface by high temperature spraying, after the PI film 301 solidifies, the aluminum strip with the PI film 301 is coiled on the roller, and the 3D bending machine is extruded and vertically bent to form the aluminum row 3 and the aluminum row terminal 4, then the aluminum row terminal 4 is fixed to both ends of the aluminum row 3 by high polymer diffusion welding, and the nickel sheet 2 is welded on both sides of the aluminum row terminal 4 by high polymer diffusion welding, and the nickel sheet 2 is punched and trimmed, then the EVA heat shrink sleeve 302 is sleeved on the aluminum row 3 and the aluminum row terminal 4, and the extruded aluminum row structure body 1 is made, and when testing the extruded aluminum row structure body 1, the nickel sheet 2 part at both ends of the extruded aluminum row structure body 1 is contacted with the module installation surface, and then two M6*12 hexagonal flange bolts are fastened, the fastening force is 10N, the charging and discharging test is carried out according to the test process, and whether the extruded aluminum row structure body 1 can meet the overcurrent requirement in the battery pack is verified, so a series of work is completed.

[0029] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A new energy battery pack extruded aluminum bar structure, comprising an extruded aluminum bar structure body (1), characterized in that: The extruded aluminum row structure body (1) is provided with an aluminum row (3), and the two ends of the aluminum row (3) are symmetrically connected with aluminum row connecting terminals (4), the aluminum row (3) and the aluminum row connecting terminal (4) are both formed by extruded vertical bending, the two surfaces of the aluminum row connecting terminal (4) are respectively welded with nickel sheets (2), and the aluminum row connecting terminal (4) and the nickel sheet (2) are punched, the outside of the aluminum row (3) is formed with a PI film (301) by high-temperature spraying, and the outside of the aluminum row (3) is further coated with an EVA heat-shrinkable sleeve (302).

2. The extruded aluminum busbar structure in a new energy battery pack according to claim 1, characterized in that: The welding mode between the nickel sheet (2) and the aluminum row (3) adopts high-molecular diffusion welding, and the welding of the nickel sheet (2) satisfies the pulling force > 30N.

3. The extruded aluminum busbar structure inside a new energy battery pack according to claim 1, characterized in that: The aluminum row (3) is a hard structure, and the cross-sectional size of the aluminum row (3) is 17mm*3mm.

4. The extruded aluminum busbar structure inside a new energy battery pack according to claim 1, characterized in that: The working temperature range of the PI film (301) is between -250℃ and 400℃.

5. The extruded aluminum busbar structure inside a new energy battery pack according to claim 1, characterized in that: The voltage level of the EVA heat-shrinkable sleeve (302) is 900V DC, which satisfies 3000V DC, and the leakage current is <1mA under the condition of 60s.

6. The extruded aluminum busbar structure inside a new energy battery pack according to claim 1, characterized in that: The aluminum row connecting terminal (4) and the aluminum row (3) also adopt high-molecular diffusion welding, the welding between the aluminum row connecting terminal (4) and the aluminum row (3) satisfies the pulling force > 1500N, the welding width between the aluminum row connecting terminal (4) and the aluminum row (3) ranges from 21-30mm, and the welding overlap size between the aluminum row connecting terminal (4) and the aluminum row (3) ranges from 15-50mm.

Images