Water-cooling plate fixing structure of liquid-cooled battery

Abstract

The utility model relates to a water-cooling plate fixing structure of a liquid-cooled battery. The water-cooling plate fixing structure comprises a water-cooling plate, at least two positioning grooves are formed in the water cooling plate; the positioning groove is matched with a positioning column arranged on the box body base for limiting; the end face, provided with the liquid flow channel, of the water cooling plate in a protruding mode is arranged opposite to the box base. Supporting foam is arranged between the water cooling plate and the box body base; one end surface, deviating from the box body base, of the water cooling plate is propped against a battery cell module; and the battery cell module is fixedly connected with the box body base so as to extrude and support the foam. The water-cooling plate is positioned through the two positioning columns, the bottom of the water-cooling plate is supported by the plurality of elastic supporting foams, upward elastic force is applied to the water-cooling plate, the battery cell module is fixed on the box body base through the long bolts, downward pressure is applied to the water-cooling plate, and the water-cooling plate is fixed through friction force. Therefore, thermal expansion and cold contraction stress accumulation during heating or cooling is released, and safety and reliability are guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of battery water cooling plates, in particular to a water cooling plate fixing structure of a liquid-cooled battery. Background Art

[0002] The existing cold plate fixing method usually adopts a rigid connection, that is, multiple bolts are set around the circumference of the water-cooled plate to fix it with the base, and a thermal pad is set between the water-cooled plate and the battery module. This type of rigid connection is prone to abnormal noise due to the accumulation of stress during heating / cooling due to thermal expansion and contraction, which cannot be released. There is a certain risk in long-term use. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the utility model provides a water cooling plate fixing structure of a liquid-cooled battery.

[0004] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0005] A water-cooling plate fixing structure for a liquid-cooled battery comprises a water-cooling plate; at least two positioning grooves are arranged on the water-cooling plate; the positioning grooves cooperate with positioning columns arranged on a box base to limit the position; an end face of the water-cooling plate protruding and forming a liquid flow channel is arranged relative to the box base; a supporting foam is arranged between the water-cooling plate and the box base; an end face of the water-cooling plate facing away from the box base is abutted against a battery cell module; the battery cell module is fixedly connected to the box base to squeeze the supporting foam.

[0006] Furthermore, the water cooling plate is provided with two positioning grooves located at opposite ends of the water cooling plate.

[0007] Furthermore, the positioning groove is semicircular or circular.

[0008] Furthermore, the supporting foam is arranged between adjacent liquid flow channels.

[0009] Furthermore, a foam limiting groove for accommodating supporting foam is provided on the box base; the foam limiting groove is located at the end of the water cooling plate.

[0010] Furthermore, a relatively flat end surface of the water cooling plate is arranged opposite to the battery cell module; and a thermal conductive pad is arranged between the battery cell module and the water cooling plate.

[0011] Furthermore, the battery core module is fixedly connected to the box base via a long screw.

[0012] Furthermore, the thickness of the supporting foam is greater than the height of the liquid flow channel protrusion.

[0013] The beneficial effects of the present utility model are as follows: The water-cooling plate is positioned by two positioning posts (one on each side, left and right). The bottom of the water-cooling plate is supported by multiple elastic support foams, which give an upward elastic force to the water-cooling plate. The battery cell module is fixed to the box base by long bolts, which gives a downward pressure to the water-cooling plate, and static friction is used for fixation (the water-cooling plate does not have direct contact with the box base), so that the thermal expansion and contraction stress accumulation during heating or cooling can be released, ensuring safety and reliability. When the battery pack vibrates, the water-cooling plate and the battery cell module are always kept in a tightly fitting state, and the service life of the elastic support foam is longer than that of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0015] Figure 1 is an exploded view of the structure of the present utility model;

[0016] Figure 2 is a three-dimensional view of the water-cooling plate of the present utility model;

[0017] DESCRIPTION OF THE REFERENCE NUMERALS:

[0018] 100, water-cooling plate; 110, positioning groove; 120, liquid flow channel; 130, support foam; 200, box base; 210, positioning post; 220, foam limit groove; 300, battery cell module; 310, long screw; 320, heat-conducting pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0020] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] Such as Figure 1-2As shown, a water-cooling plate fixing structure of a liquid-cooled battery comprises a water-cooling plate 100, wherein at least two positioning grooves 110 are provided on the water-cooling plate 100; the positioning grooves 110 are limitedly matched with the positioning posts 210 provided on the same base; the limiting posts are mainly used to pre-position the position of the water-cooling plate 100 to ensure the accuracy of its installation position, and are not used for fixing; therefore, the cooperation between the positioning grooves 110 and the positioning posts 210 is usually an interference fit; the positioning grooves 110 can be set as semicircular or circular; the positioning grooves 110 are preferably set at a position close to the edge of the water-cooling plate 100, so as to reduce the occupation of space and ensure that the liquid flow channel 120 has sufficient space. At the same time, the positioning grooves 110 are set close to the edge to facilitate quick installation and reduce the time for matching the positioning grooves 110 and the positioning posts 210; the convex part of the water-cooling plate 100 One end surface of the water cooling plate 100 with the liquid flow channel 120 formed thereon is arranged relative to the box base 200, and one end surface of the corresponding water cooling plate 100 which is away from the box base 200 abuts against the battery module 300, and the end surface of the water cooling plate 100 abutting against the battery module 300 is a relatively flat end surface, so that it has a larger contact area with the battery module 300, and better heat transfer is achieved; a supporting foam 130 is arranged between the water cooling plate 100 and the box base 200, and the battery module 300 is fixedly connected to the box base 200 to squeeze the supporting foam 130, and the water cooling plate 100 is fixed by friction. The advantage of such fixing is that abnormal noise caused by stress accumulation during thermal expansion and contraction when the water cooling plate 100 is heated / cooled can be avoided, and at the same time, the structure fixed by friction can better release stress and ensure the stability of the connection of the water cooling plate 100;

[0023] In one embodiment, the water-cooling plate 100 is provided with two positioning grooves 110 located at two ends of the water-cooling plate 100. The two positioning grooves 110 can effectively limit the displacement of the water-cooling plate 100 on the horizontal plane, and the use of fewer positioning columns 210 can facilitate installation;

[0024] In one embodiment, the support foam 130 is arranged between adjacent liquid flow channels 120; the support foam 130 is limited by the adjacent liquid flow channels 120, so that the support foam 130 has good stability during operation, and even if it is bumped, it will not be easily displaced; therefore, in one embodiment, the support foam 130 can be directly arranged between the box base 200 and the water-cooled plate 100 by extrusion, and the support foam 130 is not fixed to the water-cooled plate 100 or the box base 200 by adhesive, but is completely fixed by friction; in another embodiment, the support foam 130 can be bonded and fixed to the water-cooled plate 100 and / or the box base 200 by an adhesive layer, so as to further increase the stability of the connection;

[0025] In one embodiment, the supporting foam 130 is in the shape of an elongated strip and is arranged between adjacent liquid flow channels 120; in another embodiment, the supporting foam 130 is in the shape of a rectangular block, and a foam limiting groove 220 for accommodating the supporting foam 130 is provided on the box base 200, and the foam limiting groove 220 is located at the end of the water-cooled plate 100. Since the spacing between the liquid flow channels 120 at the end of the water-cooled plate 100 is small and it is not suitable to arrange a longer supporting foam 130, the block-shaped supporting foam 130 arranged at intervals has a better supporting effect, and in order to ensure the stability of the supporting foam 130 here, the space of the box base 200 is reasonably used to set the foam limiting groove 220 to limit the supporting foam 130, thereby increasing the stability of the supporting foam 130; the foam limiting groove 220 is arranged at the end of the water-cooled plate 100, which is convenient for production and processing; in one embodiment, the supporting foam 130 can also be in the shape of an elongated strip and a rectangular block and used at the same time;

[0026] In one embodiment, a relatively flat end surface of the water-cooling plate 100 is arranged relative to the battery module 300; a thermal pad 320 is arranged between the battery module 300 and the water-cooling plate 100, and the thermal pad 320 increases the thermal conductivity between the water-cooling plate 100 and the battery module 300. At the same time, the thermal pad 320 can effectively offset the uneven area between the battery module 300 and the water-cooling plate 100, increase the abutment fit between the two, and make them have a larger fitting surface;

[0027] In one embodiment, the battery module 300 is fixedly connected to the box base 200 through a long screw 310; a plurality of the long screws 310 are provided; the long screws 310 can be provided to penetrate the battery module 300 or can be provided in a plurality of circumferential directions of the battery module 300 and fixedly connected to the box base 200;

[0028] In one embodiment, the thickness of the supporting foam 130 is greater than the height of the protrusion of the liquid flow channel 120. By increasing the thickness of the supporting foam 130, it can be ensured that after the supporting foam 130 is compressed, a certain gap is maintained between the bottom of the water cooling plate 100 and the box base 200, so that it has better drop resistance. The supporting foam 130 can also be used for shock absorption.

[0029] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A fixed structure for a water-cooling plate of a liquid-cooled battery, characterized in that: The invention comprises a water cooling plate (100); at least two positioning grooves (110) are provided on the water cooling plate (100); the positioning grooves (110) cooperate with positioning columns (210) provided on a box base (200) to limit positions; an end surface of the water cooling plate (100) protruding and formed with a liquid flow channel (120) is arranged relative to the box base (200); a supporting foam (130) is provided between the water cooling plate (100) and the box base (200); an end surface of the water cooling plate (100) facing away from the box base (200) is abutted against a battery cell module (300); and the battery cell module (300) is fixedly connected to the box base (200) to squeeze the supporting foam (130).

2. The fixed structure of the water-cooling plate of a liquid-cooled battery according to claim 1, characterized in that: The water cooling plate (100) is provided with two positioning grooves (110) located at opposite ends of the water cooling plate (100).

3. The fixed structure of the water-cooling plate of a liquid-cooled battery according to claim 2, wherein: The positioning groove (110) is semicircular or circular.

4. The water-cooling plate fixing structure of a liquid-cooled battery according to claim 1, characterized in that: The supporting foam (130) is arranged between adjacent liquid flow channels (120).

5. The fixed structure of the water-cooling plate of a liquid-cooled battery according to claim 1, characterized in that: The box base (200) is provided with a foam limiting groove (220) for accommodating the supporting foam (130); the foam limiting groove (220) is located at the end of the water cooling plate (100).

6. The fixed structure of the water-cooling plate of a liquid-cooled battery according to claim 1, characterized in that: A relatively flat end surface of the water cooling plate (100) is arranged opposite to the battery cell module (300); and a thermal conductive pad (320) is arranged between the battery cell module (300) and the water cooling plate (100).

7. The fixed structure of the water cooling plate of a liquid-cooled battery according to claim 1, wherein: The battery core module (300) is fixedly connected to the box base (200) via a long screw (310).

8. The fixed structure of the water-cooling plate of a liquid-cooled battery according to claim 4, characterized in that: The thickness of the supporting foam (130) is greater than the height of the protrusion of the liquid flow channel (120).

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