CN201252123Y

CN201252123Y - Lithium ion battery box

Info

Publication number: CN201252123Y
Application number: CNU2008200857908U
Authority: CN
Inventors: 王清泉; 郑利峰; 何亚飞
Original assignee: Wanxiang Group Corp; Wanxiang Electric Vehicle Co Ltd
Current assignee: Wanxiang Group Corp; Wanxiang Electric Vehicle Co Ltd
Priority date: 2008-04-14
Filing date: 2008-04-14
Publication date: 2009-06-03
Anticipated expiration: 2018-04-14

Abstract

The utility model discloses a lithium ion battery box, wherein a box body is composed of two half box bodies which are mutually matched and can be separated, split joint surfaces of the two half box bodies take convex and concave cross shapes, convex gears are arranged on edges of two split joint surfaces, a box cover and a bottom cover are clamped on the upper end and the lower end of the box body, when a battery is abused, the battery box is rapidly deformed and tooth-shaped structures can be propped up due to external force or after an electric core is bulged to certain pressure, simultaneously, an upper cover and a lower cover can be melted and propped up due to heat, and explosion hidden danger can be effectively avoided. The lithium ion battery box has the advantages that the structure is simple, the production and assembly are convenient, the heat dissipation is rapid, the safety is high, and the like.

Description

Lithium ion battery box

Technical field

The utility model relates to the structure of battery case, specifically is a kind of lithium-ion-power cell box.

Background technology

Current, the lithium-ion-power cell that is applied to electric automobile can be divided into two kinds, and a kind of is the stiff case lithium ion battery, and a kind of is flexible packing lithium ion battery.The stiff case lithium ion battery adopts metal shell or all-plastic shell, and electric core is assemblied in the shell of sealing, and pressure sharply raise when abuse took place, and the potential safety hazard of blasting is arranged; And flexible packing lithium ion battery does not have hidden peril of explosion owing to adopt the aluminum-plastic composite membrane packing, and therefore, the flexible package cell can be accomplished more high power capacity, is more suitable for being applied to occasions such as electric automobile.

Therefore but the shortcoming of flexible packing lithium ion battery is an insufficient strength, scraps because of being subjected to extraneous sticker to stab or scratch easily, need be the electric core battery case of packing into.Because flexible packing lithium ion battery pack with aluminum-plastic composite membrane, therefore do not exist leakage problem, battery case only need play support, protect and make things convenient for battery strings, be connected in parallel.

Someone has applied for Chinese patent 03246222.0 (name is called a kind of power-type lithium ion battery plastic casing), it includes housing, loam cake and vent valve, the outer surface of housing is distributed with horizontal and vertical projection housing outer surface is surrounded several square pits, when battery parallel connection or series connection, between the housing of battery, form several air chambers, on cover the positive terminal, negative terminal and the vent valve that have hole and battery and match.Because housing is provided with projection, has increased the surface area of housing, has improved its intensity and heat dispersion, has avoided the shortcoming of housing easy deformation.But use and Transportation Engineering in the electric in-core of the release portion pressure because battery case is difficult for splitting when being squeezed is short-circuited accident and the deficiency that causes exploding easily.

Summary of the invention

The utility model has mainly solved to be difficult for splitting when the battery case that exists in the prior art is squeezed and has discharged electric in-core portion's pressure and potential safety hazard such as set off an explosion, and a kind of simple in structure, production and easy to assembly, rapid heat dissipation, safe lithium ion battery box are provided for this reason.

Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of lithium ion battery box, it includes box body, the box body upper end is connected with lid, and the box body lower end is connected with bottom, and described lid and bottom link to each other with box body by snap fastener; Be embedded with copper stud on the described lid; Described box body is worked in coordination by two and half detachable box body is formed, and this two and half box bodys Mosaic face is the convex-concave cross-like, and the edge of Mosaic face is provided with double wedge.By the dentalation on its edge, make box body of the fixing formation of two and half box body interlocks.This structure is when battery is abused, for example acupuncture, push, overcharge etc. is simulated under the abuse conditions, battery is subjected to the plastic-aluminum combined film rupture to the certain pressure of external force or flatulence, make that battery case is out of shape rapidly, dentalation can be strutted, the upper and lower covers melted by heat is strutted, energy is released, and can effectively avoid hidden peril of explosion.

As preferably, described copper stud surface is provided with screw thread, includes copper protruding plate on the copper stud, this copper protruding plate one end is outer copper stud, be used for parallel connection or series connection between the battery cell, the other end promptly is embedded in the interior copper stud that is in the lid, is connected and fixed by nut and the positive and negative lug of electric core.By copper stud battery and battery are together in series or parallel, easy to assembly, security performance is also than higher.

As preferably, described snap fastener comprises the grab that is arranged on the outside protrusion on lid and the bottom madial wall, and the box body upper/lower terminal is provided with the draw-in groove that matches with grab.Described grab shape can be triangle, semicircle, trapezoidal or irregular arc, and the contact-making surface of this grab and box body is an inclined-plane, so that snap in the draw-in groove of box body.

As preferably, that described lid and bottom adopt is fire-retardant, the macromolecular material of insulation and antistatic is made, and box body adopts metal material to make, and surface treatment has anti-corrosion and insulating barrier, can effectively prevent the metal case corrosion and have insulation function.Described flame retarded polymeric material has advantages such as intensity is good, insulation, antistatic; Box body adopts metal material, has advantages such as intensity height, rapid heat dissipation.

As preferably, described copper protruding plate embeds in the lid, and its upper and lower surface is higher than that lid is outer, inner surface 0.2mm～2mm.Adopt this kind structure, make between metal joining strips and the outer copper stud or connect closelyr between lug and the interior copper stud, bigger contact area is provided simultaneously, reduce contact resistance.

As preferably, also be provided with striped on the described copper protruding plate external peripheral surface, this striped is trapezoidal wavy, the perpendicular dentation or the sawtooth etc. that intersects.Adopt this kind structure, its objective is the contact area between increase and the plastics, copper stud and lid skid when preventing nutting.

As preferably, be equipped with reinforcement in described lid and the bottom, the surface of this reinforcement is an inclined-plane.Adopt this kind structure, both made things convenient for snapping in of box body, can guarantee that again box body is not yielding when being subjected to the sidewall extruding, play the effect of electric core in the protection box.

As preferably, described lid surfaces externally and internally is provided with corresponding both positive and negative polarity sign.Adopt this kind structure, both positive and negative polarity connects anti-when avoiding battery to connect.

Double wedge shape on the described box body can be for falling trapezoidal or falling zigzag.Adopt two half box bodys that match and rely on dentalation engaged fixing, constitute a box body, be not easy to split.

The beneficial effects of the utility model are: adopt two to work in coordination and box body that detachable half box body is formed, the box body upper/lower terminal is connected with lid and bottom, when battery the time is subjected to external force or electric core flatulence to make that battery case is out of shape rapidly, dentalation can be strutted to the certain pressure at abuse, upper and lower covers can melted by heat be strutted simultaneously, can effectively avoid hidden peril of explosion.The utlity model has advantages such as simple in structure, production and easy to assembly, rapid heat dissipation, fail safe height.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is copper stud 11 structural representations.

Fig. 3 is lid 1 structural representation.

Fig. 4 is lid 1 an internal structure schematic diagram.

Fig. 5 is bottom 3 structural representations.

Fig. 6 is box body 2 structural representations.

Embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment 1: consult Fig. 1, Fig. 3 and Fig. 4, and lithium ion battery box described in the utility model, it includes the plastic box cover 1 of a rectangle, is embedded with copper stud 11 on the lid 1.The inside and outside surface of lid 1 is provided with both positive and negative polarity sign 12, and 1 liang of long limit of lid madial wall is provided with four grabs 13, is positioned at center, long limit on the lid inner surface and is provided with reinforcement 14.

Consult Fig. 2, described copper stud 11 comprises copper protruding plate 112 and is positioned at the outer copper stud 111 and the copper stud 114 at copper protruding plate two that the diameter of outer copper stud 111 and interior copper stud 114 is less than the diameter of copper protruding plate 112; The surface of outer copper stud 111 and interior copper stud 114 is equipped with screw thread, and the external peripheral surface of copper protruding plate 112 is provided with striped 113; Copper stud 11 embeds in the lid 1 when die sinking prepares.Copper protruding plate 112 external peripheral surfaces and lid 1 fit tightly, and the upper and lower surface of copper protruding plate 112 is higher than outer, the inner surface 0.2mm～2mm of lid 1 respectively.

Consult Fig. 5, the plastic bottom cover 3 of a rectangle, 3 liang of long limits of bottom madial wall is provided with four grabs 31, is positioned at center, long limit on bottom 3 inner surfaces and is provided with reinforcement 32.

Consult Fig. 6, by the box body 2 that metal material is made, it is made up of two half box bodys 21 of working in coordination, and these two and half box bodys, 21 Mosaic faces are the convex-concave cross-like, and the edge of Mosaic face is provided with down trapezoidal double wedge 22 structure interlocks and fixes.The upper/lower terminal of box body 2 be provided with lid 1 and bottom 3 on the draw-in groove 23 that matches of grab.

When assembling electric core, earlier with about two half box bodys 21 that match fix by falling trapezoidal double wedge 22 structure interlocks, at the bottom of the box of packing into 3; Behind 114 pairs of good both positive and negative polarities of interior copper stud with battery case lid 1, be inserted in the cell polar ear that has openning hole then, assemble and use behind copper backing and the spring shim nut screwing clamping to fix; The above-mentioned electric core that installs lid 1 is packed in the box body 2 of being with bottom, knock lid 1 and make buckle 13 on the lid 1 snap in fixing getting final product in the draw-in groove 23 of box body 2; Can connect the outer copper stud 111 of battery case by metal joining strips at last, string or and be unified into the battery pack of required voltage or capacity.After battery case is assembled into battery pack, the space that is equivalent to 2 times of lid wall thickness is arranged between the box body 2, make things convenient for ventilation and heat, so this battery case has and makes simple, easy to assembly, rapid heat dissipation and safe advantage.

Claims

1. lithium ion battery box, it includes box body (2), and box body (2) upper end is connected with lid (1), and box body (2) lower end is connected with bottom (3), it is characterized in that: described lid (1) and bottom (3) link to each other with box body (2) by snap fastener; Be embedded with copper stud (11) on the described lid (1); Described box body (2) is worked in coordination by two and detachable half box body (21) is formed, and this two and half box body (21) Mosaic face is the convex-concave cross-like.

2. lithium ion battery box according to claim 1 is characterized in that: the edge of described half box body (21) Mosaic face is provided with double wedge (22).

3. lithium ion battery box according to claim 1, it is characterized in that: described copper stud (11) surface is provided with screw thread, include copper protruding plate (112) on the copper stud (11), this copper protruding plate one end is outer copper stud (111), be used for the in parallel or series connection between the battery cell, the other end promptly is embedded in and is interior copper stud (114) in the lid (1), and is connected and fixed by nut and the positive and negative lug of electric core.

4. lithium ion battery box according to claim 1, it is characterized in that: described snap fastener comprises grab (13) and (31) that are arranged on the outside protrusion on lid (1) and bottom (3) madial wall, and box body (2) upper/lower terminal is provided with the draw-in groove (23) that matches with grab.

5. lithium ion battery box according to claim 1, it is characterized in that: described lid (1) and bottom (3) adopt the macromolecular material of fire-retardant, insulation and antistatic to make, box body (2) adopts metal material to make, and surface treatment has anti-corrosion and insulating barrier.

6. lithium ion battery box according to claim 3 is characterized in that: described copper protruding plate (112) embeds in the lid (1), and its upper and lower surface is protruded outside the lid respectively, inner surface 0.2mm～2mm.

7. lithium ion battery box according to claim 6 is characterized in that: also be provided with striped (113) on described copper protruding plate (112) external peripheral surface, this striped (113) can be vertical bar shape or crossbanding.

8. lithium ion battery box according to claim 1 is characterized in that: be equipped with reinforcement (14) and (32) in described lid (1) and the bottom (3), the surface of this reinforcement (14) and (32) is an inclined-plane.

9. lithium ion battery box according to claim 1 is characterized in that: described lid (1) surfaces externally and internally is provided with corresponding both positive and negative polarity sign (12).

10. lithium ion battery box according to claim 2 is characterized in that: described box body double wedge (22) can be for falling trapezoidal or falling zigzag.