CN205211798U - Battery box - Google Patents

Abstract

The utility model provides a battery box. The embedding has the lid in the opening of this battery box's box body, the outer fringe joint of this lid is on box body open -ended internal face, the internal face of box body includes smooth face, and and this smooth facial features bend plane even, be formed with on the internal face of box body, a supporting part for supporting embedding box body division intraoral lid, this supporting part has to be opened the lower surface contact of the tip of intraoral lid and supports the holding surface of lid with the embedding box body, the supporting part is constituted to be done, contained angle between holding surface and bend plane is greater than the contained angle of holding surface and smooth interfacial. Based on this structure, can form the supporting part that supports the lid and use easily on box body open -ended internal face.

Description

Battery case

Technical field

The utility model relates to battery case, and particularly a kind of lid is embedded in the battery case in box opening.

Background technology

Usually, electric motor car, hybrid vehicle are equiped with the battery that electric energy is provided to motor.Battery is by battery inside hold electrodes unit, electrolyte and forming.As battery case, For example, Patent Document 1 discloses by the structure of the closure of openings of box body on a kind of internal face of the box opening by lid being welded on battery case.

As the structure of this lid enclosed box body opening, normally the outer rim shape of lid is identical with the opening shape of box body, and lid is embedded in box opening, and the outer rim of lid is welded on the internal face of box opening.When adopting this structure, weld job can be carried out from the open side of box opening (being upside for the box body that opening is arranged at box body top), thus easy to operate, but need on the internal face of box body, arrange the support portion (from the support portion that the internal face of box body is outstanding) positioned the lid embedded.That is, weld job is carried out under the state needing to support lid at the end face of this support portion.

On the internal face of box body, normally form the horizontal bench around the internal face whole week, such horizontal bench requires that the upper edge of box opening keeps impartial to the distance of table top, thus processes comparatively difficulty.

Patent documentation 1]: Japanese Unexamined Patent Publication 2008-311193 publication

Utility model content

For above-mentioned technical problem, the purpose of this utility model is, provides a kind of battery case easily forming the support portion supporting lid on the opening internal face of box body.

As the technical scheme solved the problems of the technologies described above, the utility model provides a kind of battery case, the opening of the box body of this battery case has been embedded in lid, the outer rim of this lid is bonded on the internal face of described opening, it is characterized in that: the internal face of described box body comprises tabular surface, and the flexure plane to be connected with this tabular surface, the internal face of described box body is formed, for supporting the support portion of the described lid embedded in described opening, this support portion has and contacts with the lower surface of the end of the described lid embedded in described opening and support the supporting surface of described lid, described support portion is configured to, angle between described supporting surface and described flexure plane is greater than the angle between described supporting surface and described tabular surface.

The advantage with the battery case of the present utility model of said structure is, easily can form the support portion for supporting lid at the internal face of box body.Specifically, because support portion is formed, angle between supporting surface and flexure plane is greater than the angle between supporting surface and tabular surface, like this, just do not need the supporting surface formed at the position of flexure plane is become and the supporting surface continuous print horizontal plane (horizontal stand terrace) formed at the position of tabular surface, thus, the dimensional accuracy (height-precision of the upper edge of relative box opening) guaranteeing the supporting surface formed at the position of flexure plane is not needed.So, the difficulty of the processing technology of support portion can be reduced.

In above-mentioned battery case of the present utility model, be preferably, described box body is prolate shape cuboid, the tabular surface of the internal face of described box body comprises, two long limit tabular surfaces that length direction along this box body extends, two minor face tabular surfaces that Width along this box body extends, the flexure plane of the internal face of described box body is, respectively by four flexure planes that adjacent described long limit tabular surface and described minor face tabular surface are connected, described support portion is only formed on the described minor face tabular surface at the length direction two ends of described box body and the described flexure plane of these minor face tabular surface both sides.Adopt this structure, because this support portion is only formed on the minor face tabular surface at box body two ends and the flexure plane of these minor face tabular surface both sides, so the scope that arranges of support portion can be limited in required minimum zone, thus reduce further the difficulty of the processing technology forming support portion on inboard wall of cartridge face.

Accompanying drawing explanation

Fig. 1 is the exploded perspective view of the battery case of execution mode.

Fig. 2 is the sectional view on the II-II line in Fig. 1.

Fig. 3 is the sectional view on the III-III line in Fig. 1.

Embodiment

Below, with reference to accompanying drawing, execution mode of the present utility model is described.

In present embodiment, to adopt the utility model to the battery case of the prismatic battery cell being formed the battery module installed in electric motor car or hybrid vehicle, be described.

At this, described prismatic battery cell is made up of secondary cells such as nickel-cadmium cell, Ni-MH battery, lithium ion batteries.In addition, prismatic battery cell is by battery inside hold electrodes unit, electrolyte and forming.By multiple prismatic battery cell lamination in the thickness direction thereof, and adjacent prismatic battery cell is connected in series and forms above-mentioned battery module.

As shown in Figure 1, battery case 1 possesses box body 2 and the lid 3 of metal (such as aluminium casting).The top of box body 2 is formed with opening 21.On lid 3, be provided with the plus end 31 and negative terminal 32 given prominence to upward from the upper surface of lid 3.The outer rim shape of lid 3 is identical with the shape of opening 21.Embedded in the opening 21 of box body 2 by lid 3, and the outer rim of lid 3 be welded on the internal face of opening 21, the opening 21 of box body 2 just can be closed by lid 3.Below, box body 2 is described in detail.

Box body 2 is the prolate shape cuboid container of opened upper end (top has opening 21), that is, the size of the long side direction of box body 2 is much larger than the size of short side direction.Below, the long side direction of box body 2 is called length direction; Short side direction is called Width.

Box body 2 has, base plate 22, two the long limit flat wall portion 23 erected from two long limits of this base plate 22 respectively, two minor face flat wall portion 24 erected from two minor faces of this base plate 22 respectively and respectively by four curved wall portion 25 that adjacent long limit flat wall portion 23 is connected with minor face flat wall portion 24.

So, the internal face of box body 2 by the respective inner face of two long limit flat wall portion 23 (namely, long limit tabular surface 26 along the length direction of box body 2 extends), the respective inner face (that is, along the minor face tabular surface 27 that the Width of box body 2 extends) of two minor face flat wall portion 24 and respective inner face (flexure plane 28) composition of four curved wall portion 25.Wherein, adjacent long limit tabular surface 26 and minor face tabular surface 27 are connected by each flexure plane 28, and form continuous print face.

In present embodiment, the internal face of box body 2 is formed with two support portions 4 supporting lid 3.Specifically, two support portions 4 respectively in being formed on the internal face at length direction two ends of box body 2 step-likely, that is, on the flexure plane 28 of each minor face tabular surface 27 and both sides thereof.

Specifically, support portion 4 is by the curved wall portion 25 of each minor face flat wall portion 24 and both sides thereof being processed into, and the wall thickness of the part from the assigned position near the opening 21 of box body 2 to the assigned position below it is formed less times greater than the wall thickness of other parts.At this, corresponding with the thickness of lid 3 from the length of upper edge to the assigned position near described opening 21 of box body 2.

The end face (table top of step) of support portion 4 is made up of the end face 41 be connected and end face 42.As shown in Figure 2, end face 41 extends in the horizontal direction from minor face tabular surface 27 in box body 2, and the angle between end face 41 and minor face tabular surface 27 is 90 °.In addition, as shown in Figure 3, towards box body inclined downward while end face 42 extends inside box body from flexure plane 28, at this, the angle between end face 42 and flexure plane 28 is such as 120 °.So, support portion 4 is configured to, and end face 42 is greater than the angle of angle formed by end face 41 and minor face tabular surface 27 with the angle of angle formed by flexure plane 28.

When lid 3 embeds in the opening 21 of box body 2, the lower surface at the both ends of the length direction of lid 3 contacts with end face 42 with the end face 41 of support portion 4 (dotted line with reference to Fig. 2 and Fig. 3) respectively, the support in portion 4 thus lid 3 is supported.In this case, the direction (upside) opened wide from the opening 21 of box body 2 is welded, and be welded on the internal face of opening 21 by the outer rim whole week of lid 3, the opening 21 of box body 2 is just closed by lid 3.

As mentioned above, in present embodiment, support portion 4 is only formed on the minor face tabular surface 27 at the length direction two ends of box body 2 and the flexure plane 28 of both sides thereof, and is not formed on two long limit tabular surfaces 26.Thus, with formed compared with the consistent support portion of level height on the internal face whole week of box body 2, the scope that arranges of support portion 4 is limited in required minimum zone, thus, significantly reduce the difficulty of the processing technology forming support portion 4 on the internal face of box body 2.

In addition, in the present embodiment, support portion 4 is configured to, and the angle between end face 42 and flexure plane 28 is greater than the angle between end face 41 and minor face tabular surface 27.Like this, just do not need the end face 42 formed at the position of flexure plane 28 is become and the end face 41 continuous print horizontal plane formed at the position of tabular surface 27, thus, the dimensional accuracy (height-precision of the upper edge of the opening 21 of relative box body 2) guaranteeing the end face 42 formed at the position of flexure plane 28 is not needed.Thereby, it is possible to reduce the difficulty of the processing technology of support portion 4.In addition, comparatively downward-sloping end face 42 can also be utilized to make up the height tolerance of the support portion 4 being formed in box body 2 two ends, regulate the positioning height of lid 3 at opening 21 place of box body 2.

Above, for above-mentioned execution mode, the utility model is illustrated, but the utility model is not by above-mentioned execution mode is limited, and can suitably change.Such as, the angle between the end face 41 of support portion 4 and minor face tabular surface 27 is not limited to 90 °, and the angle between the end face 42 of support portion 4 and flexure plane 28 is also not limited to 120 °.

Claims (2)

1. a battery case, has been embedded in lid at the opening of box body, and the outer rim of this lid is bonded on the internal face of described opening, it is characterized in that:

The flexure plane that the internal face of described box body comprises tabular surface and is connected with this tabular surface,

The internal face of described box body is formed, and for supporting the support portion of the described lid embedded in described opening, this support portion has and contacts with the lower surface of the end of the described lid embedded in described opening and support the supporting surface of described lid,

Described support portion is configured to, and the angle between described supporting surface and described flexure plane is greater than the angle between described supporting surface and described tabular surface.

2. battery case as claimed in claim 1, is characterized in that:

Described box body is prolate shape cuboid,

The tabular surface of the internal face of described box body comprises, two long limit tabular surfaces that the length direction along this box body extends, two the minor face tabular surfaces extended along the Width of this box body,

The flexure plane of the internal face of described box body is, respectively by four flexure planes that adjacent described long limit tabular surface and described minor face tabular surface are connected,

Described support portion is only formed on the described minor face tabular surface at the length direction two ends of described box body and the described flexure plane of these minor face tabular surface both sides.