WO2020135153A1

WO2020135153A1 - Battery box

Info

Publication number: WO2020135153A1
Application number: PCT/CN2019/125991
Authority: WO
Inventors: 王衡; 季进清; 张文辉; 钱木; 项延火
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2018-12-29
Filing date: 2019-12-17
Publication date: 2020-07-02
Also published as: CN209401682U

Abstract

Disclosed is a battery box, comprising: a heat exchange plate (1); a lower frame (2) including a bounding frame (21) with enclosed circumference arranged on the heat exchange plate (1); and a plurality of first fasteners (3A) arranged along the circumference of the bounding frame (21). The lower surface (211) of the bounding frame (21) comprises a first contact surface (211A) and a first non-contact surface (211B); the upper surface (11) of the heat exchange plate (1) comprises a second contact surface (11A) and a second non-contact surface (11B). The first contact surface (211A) and the second contact surface (11A) are close to the outside of the bounding frame (21), the first contact surface (211A) and the second contact surface (11A) being in contact with each other. The first fasteners (3A) penetrate through the heat exchange plate (1) and the bounding frame (21) at the first contact surface (211A) and the second contact surface (11A) to fix the heat exchange plate (1) with the bounding frame (21). The first non-contact surface (211B) and the second non-contact surface (11B) are close to the inner side of the bounding frame (21), and are separated with each other along the up-and-down direction (Z) to form a first accommodating groove (G1), the first accommodating groove (G1) being an annulus along the circumference of the bounding frame (21). The battery box further includes a first sealing element (4A), the first sealing element (4A) being an annulus along the circumference of the bounding frame (21) and being accommodated in the first accommodating groove (G1) so as to seal the plurality of first fasteners (3A) from the inner side of the bounding frame (21).

Description

battery box

Technical field

This application relates to the field of batteries, and more particularly to a battery box.

Background technique

In the battery field, the battery box includes a lower frame body and a heat exchange plate. The lower frame body includes a surrounding frame, and the surrounding frame and the heat exchange plate form an accommodation space for accommodating the battery module. The battery module includes a plurality of arranged batteries. The battery module is supported on the heat exchange plate. The heat exchange plate supports the battery and performs heat exchange with the battery. The enclosure frame and the heat exchange plate are connected together by fasteners such as screws, bolts or rivets provided along the circumference of the enclosure frame. In order to prevent external moisture from entering the receiving space through the fastener, a compressible sealing strip is usually sandwiched between the flat lower surface of the enclosure and the flat upper surface of the periphery of the heat exchange plate. However, due to the compression characteristics of the sealing strip, the current design is difficult to control a reasonable amount of compression, resulting in the inability to guarantee the sealing effect.

Summary of the invention

In view of the problems in the prior art, the purpose of the present application is to provide a battery box, which can solve the problem that the reasonable compression of the sealing strip in the background art cannot be guaranteed, resulting in the inability to guarantee the sealing effect.

In order to achieve the above object, the present application provides a battery box, which includes: a heat exchange plate; a lower frame body, including a surrounding frame, the surrounding frame is located on the heat exchange plate, and the circumference is closed together with the heat exchange plate to form an upward opening arrangement There is a storage space for the battery module, wherein at least a part of the upper surface of the heat exchange plate within the frame is used to support the battery module and perform heat exchange with the battery of the battery module; a plurality of first fasteners, along The perimeter of the frame is arranged. Wherein, the lower surface of the surrounding frame includes a first contact surface and a first non-contact surface, the upper surface of the heat exchange plate includes a second contact surface and a second non-contact surface, and the first contact surface and the second contact surface are close to the outside of the surrounding frame , The first contact surface is in contact with the second contact surface, the first fastener passes through the heat exchange plate and the surrounding frame at the first contact surface and the second contact surface and fixes the heat exchange plate and the surrounding frame together, the first The non-contact surface and the second non-contact surface are close to the inner side of the enclosure frame and spaced up and down to form a first accommodating groove, the first accommodating groove is formed in a ring shape along the circumference of the enclosure frame, and the battery box further includes a first seal The first sealing member is in a ring shape along the circumference of the surrounding frame. The first sealing member is accommodated in the first accommodating groove to seal the plurality of first fasteners from the inside of the surrounding frame.

In an embodiment, the lower frame further includes an inner beam, the inner beam is located in the surrounding frame, and the lower surface of the inner beam has a third non-contact surface near the laterally opposite sides of the inner beam and a third non-contact surface The third contact surface; the upper surface of the heat exchange plate has a fourth contact surface corresponding to the third contact surface and a fourth non-contact surface corresponding to the third non-contact surface; the battery box further includes a plurality of The second fastener is arranged along the longitudinal direction of the inner beam; the third contact surface and the fourth contact surface are in contact, and the second fastener passes through the heat exchange plate and the inner beam at the third contact surface and the fourth contact surface and will The heat exchange plate and the inner beam are fixed together, the third non-contact surface and the fourth non-contact surface are spaced apart in the up-down direction to form a second accommodating groove, and the battery box further includes a second sealing member, and the second sealing member is accommodated in In the second accommodating groove, the plurality of second fasteners are sealed from both lateral sides of the second inner beam.

In an embodiment, the first seal is a sealing strip.

In an embodiment, the second seal is a sealing strip.

In an embodiment, the first seal is a sealant.

In an embodiment, the second seal is a sealant.

In one embodiment, the first fastener is a self-sealing fastener.

In one embodiment, the second fastener is a self-sealing fastener.

In an embodiment, the battery box further includes a protective plate that protects the heat exchange plate from below; the first fastener also passes through the protective plate, and there is an inner side of the first fastener between the protective plate and the heat exchange plate The third accommodating groove, the battery box further includes a third sealing member, and the third sealing member is filled in the third accommodating groove to perform the first fastener passing through the protective plate, the heat exchange plate and the surrounding frame from the inside seal.

In an embodiment, the outer frame has a protrusion protruding downward on the outer side of the lower surface, the protrusion is radially spaced from the side of the peripheral edge of the heat exchange plate, and the battery box further includes a fourth seal, the fourth seal The piece is filled between the protrusion and the side of the peripheral edge of the heat exchange plate.

The beneficial effects of the present application are as follows: the depth of the first accommodating groove in the up-down direction is determined by the contacted first contact surface and second contact surface and the spaced apart first non-contact surface and second non-contact surface, thereby determining when When the sealing strip is used, the reasonable compression of the sealing strip can be easily determined to ensure the sealing effect; when the sealing strip is not used and the sealant is used, the problem that the reasonable compression of the sealing strip of the background technology cannot be guaranteed can be fundamentally solved , So as to ensure the sealing effect.

BRIEF DESCRIPTION

FIG. 1 is a perspective view of a battery box according to the present application, in which a battery module is shown for clarity.

2 is an assembled perspective view of the battery box according to the present application.

FIG. 3 is a bottom view of FIG. 2, where the area of the dotted line represents the area provided when the second seal is a sealing strip.

4A is a cross-sectional view taken along line A-A of FIG. 3.

4B is a cross-sectional view taken along line B-B of FIG. 3.

4C is a cross-sectional view taken along line C-C of FIG. 3.

FIG. 5 is a bottom view of FIG. 2, wherein the area of the dotted line indicates the area where the sealant is applied when the second seal is a sealant.

6A is a cross-sectional view taken along line D-D of FIG. 5.

6B is a cross-sectional view taken along line E-E of FIG. 5.

6C is a cross-sectional view taken along line F-F of FIG. 5.

7 is a cross-sectional view of a heat exchange plate of a battery box according to the present application. Among them, the reference signs are described as follows:

X left and right direction 22 Internal beams

Front and back direction of Y 221 lower surface

Z up and down direction 221A third contact surface

1 heat exchange plate 221B third non-contact surface

11 Upper surface 23 Containment chamber

11A second contact surface 3A first fastener

11B second non-contact surface 3B second fastener

11C fourth contact surface 4A first seal

11D fourth non-contact surface 4B second seal

12 Sides 4C third seals

13 First board 4D fourth seals

14 Second board 5 Protective board 5

F flow channel 6 insulation mat 6

2 Lower frame 7 battery module 7 battery module

21 Framed frame 71 Battery

211 Lower surface G1 first receiving slot

211A first contact surface G2 second receiving slot

211B first non-contact surface G3 third receiving slot

212 protrusion

detailed description

The drawings illustrate embodiments of the present application, and it will be understood that the disclosed embodiments are merely examples of the present application, and the present application can be implemented in various forms, and therefore, specific details disclosed herein should not be interpreted as limiting Rather, it is only used as a basis for claims and as an expressive basis for teaching one of ordinary skill in the art to implement the application in various ways.

In addition, expressions such as up, down, left, right, front, and back that are used to indicate the directions of operations and configurations of the components in the embodiment are not absolute but relative, and although the components are shown in the figures These indications are appropriate when the position is changed, but when these positions change, these directions should have different interpretations to correspond to the changes.

The battery box according to the present application includes a heat exchange plate 1, a lower frame 2, a plurality of first fasteners 3A, and a first seal 4A. The battery case also includes a plurality of second fasteners 3B and a plurality of second seals 4B. The battery box further includes a third sealing member 4C, a fourth sealing member 4D, a protective plate 5 and a heat insulation pad 6. The protective plate 5 protects the heat exchange plate 1 from below, as shown in FIG. 1. The protective plate 5 protects the heat exchange plate 5 from being damaged by external force and fails due to external force impact (for example, flying stone). The material of the protective plate 5 is preferably a material with strong impact resistance, such as aluminum alloy, stainless steel, high-strength steel, hot-dip galvanized bidirectional DP high-strength alloy steel, and the like. The heat insulation pad 6 is disposed between the heat exchange plate 1 and the protective plate 5, as shown in FIG. By the arrangement of the heat insulation pad 6, at least the heat transfer in the downward direction of the heat exchange plate 1 is blocked, and then the battery 71 of the battery module 7 is kept warm. The material of the heat insulation pad 6 may be heat insulation cotton or foam.

At least a part of the upper surface 11 of the heat exchange plate 1 within the enclosure 21 is used to support the battery module 7 and perform heat exchange with the battery 71 of the battery module 7. The battery 71 may generally include a case and an electrode assembly and an electrolyte housed in the case. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The battery 71 may be a can-type (or hard case) battery, as shown in FIG. 1, accordingly, the case includes a top cover and a case assembled with the top cover; or the battery 71 may be a pouch-type (or soft pack) battery, the case The body is made of an encapsulating film (for example, aluminum plastic film).

The heat exchange plate 1 includes a first plate 13 and a second plate 14; the second plate 14 is combined with the first plate 13 from below and forms a flow path F for the heat exchange medium to flow, as shown in FIG. The first plate 13 and/or the second plate 14 may be stamped and formed. In order to improve the effect of heat exchange, the heat exchange plate 1 is a material with high thermal conductivity, preferably a metal material, and more preferably an aluminum alloy material.

The lower frame 2 includes a surrounding frame 21 and an inner beam 22. Both the frame 21 and the inner beam 22 can be made of metal, such as aluminum alloy, and die castings or extruded profiles can be used. In order to reduce weight, the enclosure 21 and the inner beam 22 may have a cavity (that is, the enclosure 21 and the inner beam 22 each have a receiving cavity 23), that is, they are profiles with a cavity. Note that the longitudinal direction of the enclosure frame 21 and the inner beam 22 may be the X direction and the lateral direction may be the Y direction, or the longitudinal direction may be the Y direction and the lateral direction may be the X direction, but in this article, the lateral and longitudinal directions are the beam structure itself The direction of, that is, the local coordinate system, and the XYZ direction of the battery box in FIG. 1 are the overall coordinate system, and there is no strict correspondence between the two coordinate systems.

The inner beam 22 is located in the enclosure 21. The inner beams 22 may be provided individually, and both ends of the single inner beam 22 are respectively connected to opposite inner sides of the enclosure 21. Of course, the inner beams 22 can be provided in multiples. One end of the inner beam 22 is connected to the opposite inner side of the enclosure 21, and the other end of the inner beam 22 is connected to the other inner beam 22 and the other end is connected to the enclosure 21 Inside. Some internal beams 22 may serve to support the battery module 7, as shown in FIG.

Based on the correlation between the components, fasteners, and seals of the lower frame 2, the surrounding frame 21, a plurality of first fasteners 3A, first seals 4A, third seals 4C, and fourth seals 4D The internal beam 22, the second fastener 3B, and the second seal 4B will be described together.

First, the case 21, the plurality of first fasteners 3A, the first seal 4A, the third seal 4C, and the fourth seal 4D will be described.

In the examples of FIGS. 4A, 4B, 6A, and 6B, the upper surface 11 of the heat exchange plate 1 includes a second contact surface 11A and a second non-contact surface 11B. The surrounding frame 21 is located on the heat exchange plate 1, and the peripheral circle closes together with the heat exchange plate 1 to form an upwardly opened storage space provided with the battery module 7. The surrounding frame 21 may be integrally formed or fixedly connected by a plurality of beams. The lower surface 211 of the surrounding frame 21 includes a first contact surface 211A and a first non-contact surface 211B. A plurality of first fasteners 3A are arranged along the circumference of the enclosure 21. The first contact surface 211A and the second contact surface 11A are close to the outside of the enclosure 21, the first contact surface 211A is in contact with the second contact surface 11A, and the first fastener 3A passes through the first contact surface 211A and the second contact surface 11A Pass the heat exchange plate 1 and the enclosure 21 and fix the heat exchange plate 1 and the enclosure 21 together. The first non-contact surface 211B and the second non-contact surface 11B are close to the inside of the enclosure 21 and spaced in the up-down direction Z to form a first accommodating groove G1, and the first accommodating groove G1 has a ring shape along the circumference of the enclosure 21 . The first seal 4A has a ring shape along the circumference of the surrounding frame 21. The first seal 4A is accommodated in the first accommodating groove G1 to seal the plurality of first fasteners 3A from the inside of the surrounding frame 21. Thus, by providing a ring-shaped first seal 4A along the circumference of the enclosure 21, it is possible to seal the inside of the battery box on the plurality of first fasteners 3A arranged along the circumference of the enclosure 21 to avoid external moisture Enter the storage space through the first fastener 3A.

The first contact surface 211A and the second contact surface 11A are close to the outside of the surrounding frame 21, the first contact surface 211A is in contact with the second contact surface 11A, and the first non-contact surface 211B and the second non-contact surface 11B are close to the inside of the surrounding frame 21 and Spaced in the up-down direction Z to form a first accommodating groove G1, the first accommodating groove G1 is formed in a ring shape along the circumference of the enclosure 21, and the first fastener 3A is at the first contact surface 211A and the second contact surface 11A Passing through the heat exchange plate 1 and the surrounding frame 21 and fixing the heat exchange plate 1 and the surrounding frame 21 together, so that the first contact surface 211A and the second contact surface 11A through the contact and the spaced first non-contact surface 211B and The second non-contact surface 11B determines the depth of the first accommodating groove G1 in the up-down direction Z, so that when the sealing strip is used, the reasonable compression amount of the sealing strip can be easily determined, thereby ensuring the sealing effect; when the sealing strip is not used When the sealant is used, the problem that the reasonable compression amount of the sealing strip of the background technology cannot be guaranteed can be fundamentally solved, thereby ensuring the sealing effect. In the examples of FIGS. 4A and 6A, the first non-contact surface 211B of the surrounding frame 21 is a plane; the second non-contact surface 11B of the heat exchange plate 1 is recessed downward relative to the first non-contact surface 211B of the surrounding frame 21.

In the examples of FIGS. 4B and 6B, the second non-contact surface 11B of the heat exchange plate 1 is a plane; the first non-contact surface 211B of the enclosure 21 is concave upward relative to the second non-contact surface 11B of the heat exchange plate 1.

In the examples of FIGS. 4A, 4B, 6A, and 6B, the first fastener 3A may be a commonly used screw or rivet. Preferably, the first fastener 3A is a self-sealing fastener. The advantage of a self-sealing fastener is that it can be directly sealed at a portion close to the outside of the battery box, while conventional screws or rivets cannot achieve direct sealing. Thus, the self-sealing fastener and the first seal 4A cooperate to form a double seal. The self-sealing fastener may be a combination of riveting bolts and riveting nuts or a combination of riveting nuts and riveting bolts. Or the self-sealing fasteners are flow drill screws (FDS, Flow Drill). Flow drill screws can eliminate the need for pre-drilling holes, which can improve work efficiency and basically do not produce drill cuttings. The flow drill screw passes through the heat exchange plate 1 and extends into the receiving cavity 23 of the enclosure frame 21, thereby hiding the tip of the flow drill screw in the enclosure frame 21, thereby making the appearance of the battery box beautiful and avoiding any harm to the operator accidental damage.

In FIGS. 4B and 6B, the first fastener 3A also passes through the protective plate 5, and there is a third accommodating groove G3 between the protective plate 5 and the heat exchange plate 1 inside the first fastener 3A. The three seals 4C are filled in the third accommodating groove G3 to seal the first fastener 3A passing through the protective plate 5, the heat exchange plate 1, and the enclosure 21 from the inside.

In the examples of FIGS. 4A and 4B, the first seal 4A is a sealing strip. The sealing strip may be silicone rubber. In the examples of FIGS. 6A and 6B, the first seal 4A is a sealant. The sealant can be structural glue.

In FIGS. 4B and 6B, the third seal 4C is a sealing strip. In FIGS. 4B and 6B, the third seal 4C is a sealant. The sealant is structural adhesive.

In FIGS. 4B and 6B, the enclosure 21 has a protrusion 212 protruding downward on the outer side of the lower surface 211, the protrusion 212 is radially spaced from the side surface 12 of the peripheral edge of the heat exchange plate 1, the fourth seal 4D is filled between the protrusion 212 and the side surface 12 of the peripheral edge of the heat exchange plate 1. As mentioned above, the heat exchange plate 1 includes the first plate 13 and the second plate 14, and the contact gap between the two is exposed at the side 12 of the peripheral edge of the heat exchange plate 1, which is susceptible to the invasion of external water vapor. 4D, to prevent external water vapor from entering between the first plate 13 and the second plate 14 through the peripheral side surface 12 to reach the first fastener 3A, which will reduce the performance of the first fastener 3A in the long term. In addition, the arrangement of the fourth sealing member 4D is also helpful to improve the appearance of the battery box.

In FIGS. 4B and 6B, the fourth seal 4D is a sealing strip. The sealing strip may be silicone rubber. In FIGS. 4B and 6B, the fourth seal 4D is a sealant. The sealant can be structural glue.

Next, the case of the inner beam 22, the second fastener 3B, and the second seal 4B will be described.

In the examples of FIGS. 4C, 4D, 6C, and 6D, the lower surface 221 of the inner beam 22 has a third non-contact surface 221B close to the laterally opposite sides of the inner beam 22 and a third non-contact surface 221B. The third contact surface 221A between them; the upper surface 11 of the heat exchange plate 1 has a fourth contact surface 11C corresponding to the third contact surface 221A and a fourth non-contact surface 11D corresponding to the third non-contact surface 221B. A plurality of second fasteners 3B are arranged along the longitudinal direction of the inner beam 22; the third contact surface 221A contacts the fourth contact surface 11C, and the second fastener 3B passes through the third contact surface 221A and the fourth contact surface 11C The heat exchange plate 1 and the inner beam 22 fix the heat exchange plate 1 and the inner beam 22 together. The third non-contact surface 221B and the fourth non-contact surface 11D are spaced apart in the up-down direction Z to form a second accommodating groove G2. The second seal 4B is accommodated in the second accommodating groove G2 to seal the plurality of second fasteners 3B from the laterally outer sides of the second inner beam 22. By providing the second seals 4B from both lateral outer sides of the second inner beam 22, a plurality of second fasteners 3B arranged along the lateral outer sides of the second inner beam 22 can be sealed to prevent external moisture from passing through the second The seal 4B enters the receiving space on both lateral sides of the second inner beam 22.

As before, the third contact surface 221A and the fourth contact surface 11C are in contact, the third non-contact surface 221B and the fourth non-contact surface 11D are spaced apart in the up-down direction Z to form a second accommodating groove G2, and the second fastening The piece 3B passes through the heat exchange plate 1 and the inner beam 22 at the third contact surface 221A and the fourth contact surface 11C and fixes the heat exchange plate 1 and the inner beam 22 together, thereby passing the third contact surface 221A and the first The four contact surfaces 11C and the spaced apart third non-contact surface 221B and fourth non-contact surface 11D determine the depth of the second accommodating groove G2 in the up-down direction Z, whereby the seal strip can be determined very easily when the seal strip is used Reasonable compression amount to ensure the sealing effect; when the sealing strip is not used but the sealant is used, the problem that the reasonable compression amount of the sealing strip of the background technology cannot be guaranteed can be fundamentally solved, thereby ensuring the sealing effect.

In the examples of FIGS. 4C and 6C, the fourth non-contact surface 11D of the heat exchange plate 1 is a plane; the third non-contact surface 221B of the inner beam 22 is concave upward relative to the fourth non-contact surface 11D of the heat exchange plate 1.

In the examples of FIGS. 4D and 6D, the third non-contact surface 221B of the inner beam 22 is flat; the fourth non-contact surface 11D of the heat exchange plate 1 is recessed downward relative to the third non-contact surface 221B of the inner beam 22.

In the examples of FIGS. 4C and 4D, the second seal 4B is a sealing strip. The sealing strip may be silicone rubber. In the examples of FIGS. 6C and 6D, the second seal 4B is a sealant. The sealant can be structural glue. Filling with sealant When the amount of sealant is sufficient, at least the first accommodating groove G1, the second accommodating groove G2 and the third accommodating groove G3 are completely filled without a gap, which is better than the sealing of the sealing strip better result.

In the examples of FIGS. 4C, 4D, 6C, and 6D, the second fastener 3B may be a commonly used screw. Preferably, the second fastener 3B is a self-sealing fastener. As before, the advantage of self-sealing fasteners is that they can be directly sealed at the location near the outside of the battery box, while conventional screws or rivets cannot achieve direct sealing. As a result, the self-sealing fastener and the second seal 4B cooperate to form a double seal. Similarly, the self-sealing fastener is a combination of a riveting bolt and a riveting nut or a combination of a riveting nut and a riveting bolt. Alternatively, the self-sealing fasteners are flow drill screws. Flow drilling screws can eliminate the need for pre-drilling holes, which can improve work efficiency and basically do not generate drill cuttings. Flow drill screws pass through the heat exchange plate 1 and extend into the receiving cavity 23 of the inner beam 22. Similarly, the flow drill screw passes through the heat exchange plate 1 and extends into the receiving cavity 23 of the inner beam 22, thereby hiding the tip of the flow drill screw in the inner beam 22, thereby making the appearance of the battery box beautiful and avoiding The operator caused accidental injury.

Finally, briefly explain the operation process. When the first seal 4A, the second seal 4B, the third seal 4C, and the fourth seal 4D are sealing strips, first turn the lower frame 2 upside down and place the first seal 4A in the first container In the portion corresponding to the first non-contact surface 211B of the enclosure 21 of the groove G1, the second seal 4B is placed on the portion of the third non-contact surface 221B of the inner beam 22 constituting the second accommodating groove G2 with reference to FIG. 3. After that, the heat exchange plate 1 is placed, and then the third seal 4C is placed on the heat exchange plate 1 corresponding to the position of the third accommodating groove G3, the insulation pad 6 and the protective plate 5 are placed, and then the first fastener 3A and The second fastener 3B fixes the protective plate 5, the heat insulation pad 6, the heat exchange plate 1 and the lower frame 2 together, and finally a fourth seal 4D is provided.

When the first seal 4A, the second seal 4B, the third seal 4C, and the fourth seal 4D are sealants, first turn the lower frame 2 upside down and apply the uncured sealant that can flow under pressure The second contact surface 11A of the heat exchange plate 1 (for the first seal 4A) and the fourth contact surface 11C (refer to the area of FIG. 5 for the second seal 4B), after which the heat exchange plate 1 is placed, and then the sealant The position corresponding to the third accommodating groove G3 is coated on the back surface of the heat exchange plate 1 (backing to the second contact surface 11A and adjacent to the third accommodating groove G3, for the third sealing member 4C), and the insulation pad 6 is placed And the protective plate 5, and then install the first fastener 3A and the second fastener 3B to fix the protective plate 5, the insulation pad 6, the heat exchange plate 1 and the lower frame 2 together, during the fixing process, different parts (The second contact surface 11A of the heat exchange plate 1 is in contact with the first contact surface 211A of the enclosure 21, the fourth contact surface 11C of the heat exchange plate 1 is in contact with the third contact surface 221A of the inner beam 22, and the heat exchange plate 1 The surface of the second contact surface 11A and the surface adjacent to the third accommodating groove G3 is in contact with the surface corresponding to the protective plate 5), the sealant flows under pressure, so as to flow to the corresponding first accommodating groove G1, the second In the accommodating groove G2 and the third accommodating groove G3, finally sealant is applied to the portion of the fourth seal 4D, and the seal is completed after the sealant is cured.

The above detailed description describes various exemplary embodiments, but this document is not intended to be limited to the explicitly disclosed combinations. Therefore, unless stated otherwise, the various features disclosed herein may be combined together to form multiple additional combinations not shown for simplicity.

Claims

A battery box is characterized by comprising:

Heat exchange plate (1);

The lower frame (2) includes a surrounding frame (21), the surrounding frame (21) is located on the heat exchange plate (1), and the peripheral circle is closed together with the heat exchange plate (1) to form an upward opening of the battery module (7) ) Storage space, wherein at least a part of the upper surface (11) of the heat exchange plate (1) within the enclosure (21) is used to support the battery module (7) and the battery of the battery module (7) ( 71) Heat exchange;

A plurality of first fasteners (3A) are arranged along the circumference of the enclosure frame (21),

among them,

The lower surface (211) of the enclosure (21) includes a first contact surface (211A) and a first non-contact surface (211B),

The upper surface (11) of the heat exchange plate (1) includes a second contact surface (11A) and a second non-contact surface (11B),

The first contact surface (211A) and the second contact surface (11A) are close to the outside of the enclosure (21), the first contact surface (211A) is in contact with the second contact surface (11A), and the first fastener (3A) is located at A contact surface (211A) and a second contact surface (11A) pass through the heat exchange plate (1) and the surrounding frame (21) and fix the heat exchange plate (1) and the surrounding frame (21) together,

The first non-contact surface (211B) and the second non-contact surface (11B) are close to the inner side of the enclosure (21) and spaced in the vertical direction (Z) to form a first accommodating groove (G1), the first accommodating groove (G1) has a ring shape along the circumference of the enclosure (21),

The battery box further includes a first sealing member (4A), the first sealing member (4A) is formed in a ring shape along the circumference of the surrounding frame (21), and the first sealing member (4A) is received in the first accommodating groove (G1), A plurality of first fasteners (3A) are sealed from the inside of the enclosure (21).
The battery box according to claim 1, wherein:

The lower frame body (2) further includes an inner beam (22), the inner beam (22) is located in the surrounding frame (21),

The lower surface (221) of the inner beam (22) has a third non-contact surface (221B) close to the laterally opposite sides of the inner beam (22) and a third contact surface between the third non-contact surface (221B) (221A);

The upper surface (11) of the heat exchange plate (1) has a fourth contact surface (11C) corresponding to the third contact surface (221A) and a fourth non-contact surface (11D) corresponding to the third non-contact surface (221B) ;

The battery box further includes a plurality of second fasteners (3B) arranged along the longitudinal direction of the inner beam (22);

The third contact surface (221A) and the fourth contact surface (11C) are in contact, and the second fastener (3B) passes through the heat exchange plate (1) at the third contact surface (221A) and the fourth contact surface (11C) And the internal beam (22) and fix the heat exchange plate (1) and the internal beam (22) together,

The third non-contact surface (221B) and the fourth non-contact surface (11D) are spaced in the up-down direction (Z) to form a second accommodating groove (G2),

The battery box further includes a second seal (4B), the second seal (4B) is received in the second accommodating groove (G2), so as to face the plurality of first Two fasteners (3B) are sealed.
The battery case according to claim 1, wherein the first sealing member (4A) is a sealing strip or a sealant.
The battery box according to claim 2, characterized in that the second sealing member (4B) is a sealing strip or a sealant.
The battery case according to claim 1, wherein the first fastener (3A) is a self-sealing fastener.
The battery case according to claim 2, characterized in that the second fastener (3B) is a self-sealing fastener.
The battery box according to claim 5 or 6, wherein the self-sealing fastener is a combination of a riveting bolt and a riveting nut, a combination of a riveting nut and a riveting bolt, or a flow drilling screw.
The battery box according to claim 2, characterized in that both the surrounding frame (21) and the inner beam (22) have a receiving cavity (23).
The battery box according to claim 1, wherein:

The battery box also includes a protective plate (5) that protects the heat exchange plate (1) from below;

The first fastener (3A) also passes through the protective plate (5), and there is a third accommodating groove (inside of the first fastener (3A) between the protective plate (5) and the heat exchange plate (1) G3),

The battery box further includes a third seal (4C), which is filled in the third accommodating groove (G3) to pass through the protective plate (5), the heat exchange plate (1), and the enclosure The first fastener (3A) of (21) is sealed from the inside.
The battery box according to claim 1, characterized in that the enclosure (21) has a protrusion (212) protruding downward on the outside of its lower surface (211), the protrusion (212) and the heat exchange plate (1 ), the side surfaces (12) of the peripheral edge are spaced apart in the radial direction, and the battery box further includes a fourth seal (4D), which is filled between the protrusion (212) and the peripheral edge of the heat exchange plate (1) Between the sides (12).