Edge beam structure of battery box body and battery box body thereof

Abstract

The boundary beam structure comprises a plurality of boundary beams which are arranged on the periphery of the battery box body and are sequentially connected in an end-to-end mode, an avoiding notch is formed in the side, away from a battery pack, of the bottom of each boundary beam, a liquid cooling plate is connected to the lower portion of each boundary beam through a plurality of fasteners, and the liquid cooling plate is connected to the lower portion of each boundary beam through a plurality of fasteners. The horizontal projection area of the avoiding notch is larger than the horizontal projection area of the fat edge of the liquid cooling plate, and sealant is filled between the bottom of the edge beam and the liquid cooling plate. The shape of the edge beam avoiding part corresponding to the avoiding notch is a step shape or an oblique line shape, and the joint of the avoiding notch and the edge beam adopts fillet smooth transition. According to the utility model, the avoiding notch for avoiding the fat edge is arranged at the bottom of the edge beam of the battery box body, so that on one hand, the fat edge is allowed to exist in the production of the liquid cooling plate, and the production cost is reduced; on the other hand, the avoiding notch increases an extra glue overflowing space for the sealant, and the situation that the sealant overflows out of the box body and is difficult to clean is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a kind of side beam structure of battery box and battery box thereof. BACKGROUND

[0002] With the safety requirement of power battery being higher and higher, the upper surface edge of the liquid cooling plate at the bottom of the battery box is gradually sprayed with a certain thickness of insulating paint to improve the overall insulation voltage safety performance of the battery box. As shown in the figure, but due to the process of spraying insulating paint, the insulating paint on the edge of the liquid cooling plate 3 is too thick, thereby causing the fat edge 31, which can cause the side beam 1 above it to be difficult to install and unable to absorb the thickness of the fat edge 31. At the same time, in order to ensure the sealing between the side beam 1 and the liquid cooling plate 3, thicker sealant 4 needs to be applied. Figure 1

[0003] Therefore, a new solution is needed to solve the above problems. SUMMARY

[0004] The utility model provides a kind of side beam structure of battery box and battery box thereof, which can solve the fat edge problem caused by the process of spraying insulating paint on the edge of the liquid cooling plate in the prior art.

[0005] The utility model provides a kind of side beam structure of battery box, including the side beam of being sequentially connected in the first and last of being set in the four around of battery box Multiple, the bottom of side beam is away from the side of battery pack and is equipped with the avoidance gap, the liquid cooling plate is connected in the below of side beam by multiple fastener, the horizontal projection area of the avoidance gap is greater than the horizontal projection area of the fat edge of liquid cooling plate, and the sealant is filled between the bottom of side beam and liquid cooling plate.

[0006] Further, the shape of the side beam avoidance portion corresponding to the avoidance gap is step-shaped, and the connection between the avoidance gap and the side beam is smoothly transitioned with a rounded corner.

[0007] Further, the height of the side beam avoidance portion is 2-3mm.

[0008] Further, the shape of the side beam avoidance portion corresponding to the avoidance gap is diagonal, and the connection between the side beam avoidance portion and the side beam is smoothly transitioned with a rounded corner.

[0009] Further, the angle between the side beam avoidance portion and the horizontal plane is 20-40°.

[0010] Further, the horizontal projection length of the side beam avoidance portion is 1 / 5-1 / 3 of the width of the side beam.

[0011] Further, the horizontal projection length of the side beam avoidance portion is 1 / 4 of the width of the side beam.​

[0012] Further, the fastener includes a plurality of sets of cooperating pull rivet nuts and blind rivets.

[0013] The utility model further provides a battery box body, including the edge beam structure of above-mentioned battery box body.

[0014] Compared with the prior art, the utility model discloses an avoiding gap for avoiding the fat edge at the bottom of the edge beam of the battery box body, which allows the existence of fat edges in the production of the liquid cooling plate and reduces the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a partial connection view of the edge beam and the liquid cooling plate in the prior art;

[0016] Figure 2 It is a structural schematic view of the battery box body of the utility model;

[0017] Figure 3 It is a partial connection view of the edge beam and the liquid cooling plate in the first embodiment of the utility model;

[0018] Figure 4 It is Figure 3 It is an enlarged schematic view of the structure at A in the middle;

[0019] Figure 5 It is a partial connection view of the edge beam and the liquid cooling plate in the second embodiment of the utility model;

[0020] Figure 6 It is Figure 5 It is an enlarged schematic view of the structure at B in the middle;

[0021] Reference signs: 1, edge beam;11, edge beam avoiding part;2, avoiding gap;3, liquid cooling plate;31, fat edge;4, sealant. DETAILED DESCRIPTION

[0022] In order to further understand the utility model content, characteristics and efficacy of the utility model, the following examples are given, and the attached drawings are combined. Figures 2 to 6 The detailed description is as follows.

[0023] For example, Figures 2 to 6As shown, the utility model provides a kind of edge beam structure of battery box, including the edge beam 1 of first tail connection in order to multiple settings in the four around of battery box, the bottom of the edge beam 1 is away from the side of battery pack and is equipped with the avoiding gap 2, since fat edge 31 exists in the outside of battery box, avoiding gap 2 is located in the same side of fat edge 31, the lower of the edge beam 1 is connected with liquid cooling plate 3 by multiple fasteners, the horizontal projection area of avoiding gap 2 is greater than the horizontal projection area of fat edge 31 of liquid cooling plate 3, the bottom of the edge beam 1 and liquid cooling plate 3 are filled with sealant 4.

[0024] The utility model discloses a kind of avoiding fat edge's avoiding gap in the bottom of the edge beam of battery box, one aspect allows fat edge in liquid cooling plate production, reduce production cost;The other aspect, the avoiding gap gives sealant additional overflow space, avoid glue overflow to the outside of box, difficult to clean.

[0025] As the embodiment one of the utility model, Figure 3 And 4 As shown, the shape of the edge beam avoiding portion 11 corresponding to the position of avoiding gap 2 is step-shaped, the connection between avoiding gap 2 and edge beam 1 is smoothly transitioned with round corner, wherein the middle corner of step-shaped is also smoothly transitioned with round corner, to avoid stress concentration, the height of edge beam avoiding portion 11 is 2-3mm, since the thickness of fat edge 31 of liquid cooling plate 3 is generally not more than 2mm, therefore the height of edge beam avoiding portion 11 can meet the above requirements, and no interference is generated.

[0026] As the embodiment two of the utility model, Figure 5 And 6 As shown, the shape of the edge beam avoiding portion 11 corresponding to the position of avoiding gap 2 is oblique line-shaped, the connection between edge beam avoiding portion 11 and edge beam 1 is smoothly transitioned with round corner, to avoid stress concentration.

[0027] In the embodiment two, as shown, Figure 6 The angle between edge beam avoiding portion 11 and horizontal plane is 30°, other values between 20-40° can also be adopted, to avoid affecting the structural strength of edge beam 1 by using suitable angle.

[0028] In the embodiment two, as shown, Figure 4 And 6As shown, since the fat edge 31 of the liquid cooling plate 3 is only distributed on the outer side of the edge beam 1, the horizontal projection length of the fat edge 31 is generally 1 / 5-1 / 3 of the width of the edge beam 1, and the shape is approximately a right triangle, the thickness of the fat edge 31 gradually decreases along the direction close to the battery pack, and the thickness of the insulating paint at a position exceeding 1 / 3 of the width of the edge beam 1 can be ignored, which will not affect the installation of the edge beam 1, wherein the horizontal projection length of the edge beam avoiding portion 11 is 1 / 4 of the width of the edge beam 1, and the ratio can also be other values between 1 / 5-1 / 3, so as to avoid the avoiding gap 2 being too large, thereby affecting the structural strength of the edge beam 1.

[0029] In the embodiment, as shown in the drawings, Figure 2 As shown, the fastener includes a plurality of sets of cooperating pull rivet nuts and core-pulling rivets (not shown in the drawings), which are cooperated to fix and connect the edge beam 1 and the liquid cooling plate 3 together, and then the sealing glue 4 is used to ensure the sealing between the edge beam 1 and the liquid cooling plate 3, so as to ensure the sealing of the whole battery box body, and in addition, the edge avoiding gap 2 also provides an overflow space for the sealing glue 4, so as to avoid the glue overflow outside the box body and be difficult to clean.

[0030] The utility model also provides a battery box body comprising the edge beam structure of the above battery box body.

[0031] The above-mentioned utility model only expresses the implementation mode of the embodiment of the utility model, and therefore cannot be understood as the limitation of the scope of the utility model patent, and is not any form of limitation on the structure of the embodiment of the utility model. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the embodiment of the utility model, a number of changes and improvements can be made, which belong to the protection scope of the embodiment of the utility model.

Claims

1. A side beam structure of a battery case, characterized by: The application relates to a battery box body edge beam structure, which comprises a plurality of edge beams (1) arranged around a battery box body and sequentially connected in a head-to-tail mode, a avoiding gap (2) is formed in the bottom of the edge beam (1) away from the side of the battery pack, a liquid cooling plate (3) is connected to the lower side of the edge beam (1) through a plurality of fasteners, the horizontal projection area of the avoiding gap (2) is larger than that of the fat edge (31) of the liquid cooling plate (3), and sealing glue (4) is filled between the bottom of the edge beam (1) and the liquid cooling plate (3).

2. The edge beam structure of a battery case according to claim 1, characterized by: The shape of the edge beam avoiding part (11) corresponding to the avoiding gap (2) is step-shaped, and the connection between the avoiding gap (2) and the edge beam (1) is smoothly transitioned through a round corner.

3. The edge beam structure of a battery case according to claim 2, characterized by: The height of the edge beam avoiding part (11) is 2-3 mm.

4. The edge beam structure of a battery case according to claim 1, wherein: The shape of the edge beam avoiding part (11) corresponding to the avoiding gap (2) is oblique line-shaped, and the connection between the edge beam avoiding part (11) and the edge beam (1) is smoothly transitioned through a round corner.

5. The cell case's beam structure according to claim 4, characterized in that: The included angle between the edge beam avoiding part (11) and the horizontal plane is 20-40 degrees.

6. The edge beam structure of a battery case according to any one of claims 1 to 5, characterized by: The horizontal projection length of the edge beam avoiding part (11) is 1 / 5-1 / 3 of the width of the edge beam (1).

7. The cell case's beam structure according to claim 6, characterized in that: The horizontal projection length of the edge beam avoiding part (11) is 1 / 4 of the width of the edge beam (1).

8. The edge beam structure of a battery case according to claim 1, wherein: The fastener comprises a plurality of groups of pull-rivet nuts and core-pulling rivets matched with each other.

9. A battery pack, characterized by: The application further discloses a battery box body comprising the edge beam structure.

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