High-strength liquid-cooled battery pack box tray capable of preserving heat and equalizing temperature

Abstract

A high-strength liquid-cooled battery pack box tray capable of preserving heat and equalizing temperature comprises a bottom plate, edge beams are arranged on the two side wall faces of the bottom plate respectively, a rear beam is arranged on the bottom plate, a front beam is arranged on the bottom plate, the bottom faces of the front beam and the rear beam are arranged on the upper surface of an assembly formed by connecting the edge beams and the bottom plate into a whole, a front panel is arranged in front of the front beam, and a heat insulation piece is arranged at the lower end of the bottom plate. A liquid cooling plate is arranged at the lower end of the heat-insulating part; the device is simple in structure, novel in conception, convenient to use and high in practicability; the battery pack box body tray effectively solves the problems that an existing battery pack box body tray is poor in effect of maintaining temperature consistency of single batteries and poor in structural strength.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage auxiliary equipment, in particular to a high-strength liquid-cooled battery pack box tray that is heat-insulated and temperature-uniform. Background Art

[0002] As a new type of green energy that replaces traditional non-renewable fossil energy, lithium batteries are increasingly widely used in new energy storage systems and are increasingly valued. As one of the core energy storage units of the energy storage system, the service life, safety (mechanical, electrical, and thermal aspects), and charge and discharge performance of the battery pack system have gradually become one of the key technical indicators. Therefore, the cooling method of the battery cells in the battery pack is gradually changing from air cooling to liquid cooling to improve the cooling efficiency. The current air-cooled battery pack has the disadvantages of low cooling and heat exchange efficiency, uneven liquid cooling heat exchange, end plate effect of the battery cell, and low space utilization due to the internal reserved air duct, which makes it difficult to meet the high-rate charging and discharging rate requirements of large-scale energy storage systems.

[0003] Due to the poor temperature consistency of current battery cells, which leads to shortened service life, swelling and even leakage and other safety issues, an additional insulation layer structure is needed on the outside of the box. However, the insulation layer of existing box pallets is mostly located at the bottom layer and exposed to the outside. During use, there is a problem that the insulation layer is worn and damaged, resulting in insulation failure. In addition, the integrity of the various structural parts of the existing box pallet is poor, resulting in poor overall structural strength, and the protection effect on the battery pack inside is poor. Utility Model Content

[0004] In view of the above situation, in order to make up for the shortcomings of the prior art, the purpose of the utility model is to provide a high-strength liquid-cooled battery pack box tray with thermal insulation and uniform temperature, which effectively solves the problems of poor temperature consistency of battery cells and poor structural strength of the existing battery pack box tray.

[0005] The technical solution is that the utility model comprises a bottom plate, side beams are respectively arranged on the left and right side walls of the bottom plate, a rear beam is arranged on the rear side of the bottom plate, a front beam is arranged on the front side of the bottom plate, the bottom surfaces of the front beam and the rear beam are respectively placed on the upper surface of the component which is connected as a whole by the side beams and the bottom plate, a front panel is arranged in front of the front beam, the front beam, the rear beam, the side beam, the front panel and the bottom plate are welded and connected as a whole, the overall strength is high and good sealing can be guaranteed, a liquid cooling plate is arranged at the lower end of the bottom plate, the bottom plate and the liquid cooling plate are separated by a heat insulation component so that the bottom plate and the liquid cooling plate are not in direct contact.

[0006] Compared with the prior art, the beneficial effects of the utility model are:

[0007] It can support and protect the battery pack. The side beams, rear beams, middle beams and front beams are welded together to form a whole. The whole bears the weight of the internal battery module and cells together, and has the advantage of high strength.

[0008] The bottom plate, front beam, side beam, rear beam, etc. are welded together to further increase the sealing and strength;

[0009] The heat insulation components are placed between the bottom plate and the liquid cooling plate, which effectively eliminates the problems of wear and tear caused by external factors and the impact of the environment on the heat insulation components.

[0010] The heat insulation components further improve the heat preservation effect, and have the functions of vibration reduction and internal heat insulation. When the liquid cooling plate cools the battery, it prevents the temperature of each area from being inconsistent, so that the battery cells can be evenly heated and insulated to maintain the optimal life of the battery system.

[0011] The cable management slot can organize the connecting cables on the battery to prevent the layout from being messy;

[0012] One-time stamping of the front panel can avoid repeated machining, and has the advantages of high processing efficiency and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the main axonometric drawing of the utility model.

[0014] Figure 2 It is a top axonometric drawing of the utility model.

[0015] Figure 3 It is an exploded view of the utility model after the reinforcing ribs are removed.

[0016] Figure 4 It is an exploded view of the utility model.

[0017] Figure 5 It is an axonometric drawing of the bottom plate in the utility model. DETAILED DESCRIPTION

[0018] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0019] Depend on Figures 1 to 5 It is given, including a bottom plate 1, side beams 2 are respectively arranged on the left and right side walls of the bottom plate 1, a rear beam 3 is arranged on the rear side of the bottom plate 1, and a front beam 4 is arranged on the front side of the bottom plate 1. The bottom surfaces of the front beam 4 and the rear beam 3 are respectively placed on the upper surface of the component which is connected as a whole by the side beam 2 and the bottom plate 1, and a front panel 5 is arranged in front of the front beam 4. The front beam 4, the rear beam 3, the side beam 2, the front panel 5 and the bottom plate 1 are welded and connected as a whole, and the overall strength is high and good sealing can be guaranteed. A liquid cooling plate 7 is arranged at the lower end of the bottom plate 1, and the bottom plate 1 and the liquid cooling plate 7 are separated by a heat insulation component 6 so that the bottom plate 1 and the liquid cooling plate 7 are not in direct contact.

[0020] For the purpose of supporting, a middle beam 8 located between the front beam 4 and the rear beam 3 is provided at the upper end of the base plate 1 .

[0021] In order to increase the structural strength, various forms of supporting reinforcement ribs 9 may be added to the bottom plate 1 and the side beam 2 according to actual needs.

[0022] In order to facilitate the connection of lines, a plurality of wire management grooves 10 are provided on the front panel 5 .

[0023] In order to ensure the consistency of overall strength, the side beams 2, front beams 4, rear beams 3 and middle beams 8 can be connected to the bottom plate 1 by stir friction welding, CMT welding, wire welding, laser seaming, structural adhesive bonding, etc. to form a whole with a certain strength.

[0024] In order to reduce the cost, the front panel 5 is formed in one step by using a stamping plate.

[0025] In order to facilitate tight sealing, the contours of the two ends of the rear beam 3 are adapted to and matched with the contours of the surfaces of the two side beams 2 .

[0026] In order to achieve a better cooling effect, the liquid cooling plate 7 is divided into a stamped flow channel plate and an upper flat plate. The flow channel plate and the upper flat plate are brazed into a whole, and the flow channel design is flexible.

[0027] In order to ensure the heat insulation effect, the heat insulation component 6 can be made of low thermal conductivity materials such as aerogel, foam, insulation felt, epoxy resin foam layer, etc.

[0028] In order to facilitate quick installation by operators, a plurality of positioning holes are provided on the front beam 4 , the rear beam 3 and the middle beam 8 .

[0029] When the utility model is used, the battery pack to be used is first placed on the bottom plate 1, and then the lines connected to the battery are passed through the wire management groove 10 and combed, and then the top cover corresponding to the bottom plate 1 is fixed. When in use, since the heat insulation and heat preservation member 6 is located between the bottom plate 1 and the liquid cooling plate 7, the heat insulation and heat preservation member 6 will not be worn or damaged, and the battery can be continuously insulated and heat-preserved, preventing the liquid cooling plate 7 from causing poor temperature consistency of the battery monomer when cooling the battery, thereby shortening the life or causing expansion and leakage problems, thereby increasing the use of the battery pack The bottom plate 1 has a simple structure and can be a flat plate or a profile plate with a reinforced support structure. It can be welded to the side beam 2 in a straight line without difficult welding contact areas, which can ensure welding strength and sealing while improving production efficiency and saving costs. The side beam 2, rear beam 3, middle beam 8, and front beam 4 are welded to form a whole. The side beam 2 and rear beam 3 are extruded aluminum profiles with high strength. The whole body bears the weight of the internal battery module and battery core together, and has the advantage of high strength. The bottom bottom plate 1 is welded as a whole to further increase the sealing and strength, and improve the stability of the entire box pallet when it moves at high speed or is bumped;

[0030] In addition, the heat insulating component 6 between the liquid cooling plate 7 and the base plate 1 ensures that the bottom of the liquid cooling plate 7 is not in direct contact with the large heat transfer surface of the base plate 1, which plays a role in heat preservation and uniform temperature and eliminates the problem of wear and tear of the insulation layer. The improved flatness of the liquid cooling base plate 1 is conducive to ensuring that the upper surface of the liquid cooling plate 7 is in full contact with the battery cell, reducing the problem of high contact thermal resistance caused by uneven application of thermal conductive glue, and avoiding the failure of the heat insulating component 6 due to long-term wear. The heat insulating component 6 supports the liquid cooling plate 7, reduces the flatness error of the liquid cooling plate 7 and improves the load-bearing capacity of the liquid cooling plate 7. At the same time, the cooling flow channel surface of the liquid cooling plate 7 is not in direct contact with the large upper surface of the base plate 1, which plays a role in vibration reduction and internal heat insulation, and the positioning holes can facilitate operators to install quickly.

[0031] Compared with the prior art, the beneficial effects of the utility model are as follows: the bottom plate, thermal insulation parts, liquid cooling plate, etc. are provided to support and protect the battery pack; the side beams, rear beam, middle beam, and front beam are welded to each other into a whole, and the whole bears the weight of the internal battery module and battery cells, etc., and has the advantage of high strength. The bottom plate is welded as a whole to further increase the sealing and enhance the strength. At the same time, since the thermal insulation parts are located between the bottom plate and the liquid cooling plate, the wear and damage caused by external factors and the influence of the environment on the thermal insulation parts are effectively eliminated, and the insulation effect is further improved. It also has the functions of vibration reduction and buffering and internal thermal insulation, so that the battery cells can be evenly heated and insulated to maintain the optimal life of the battery system. This structure is simple, novel in conception, easy to use, and highly practical.

Claims

1. A high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature, comprising a bottom plate (1), characterized in that: Side beams (2) are respectively arranged on the left and right side walls of the bottom plate (1); a rear beam (3) is arranged on the rear side of the bottom plate (1); a front beam (4) is arranged on the front side of the bottom plate (1); the bottom surfaces of the front beam (4) and the rear beam (3) are respectively placed on the upper surface of a component which is connected as a whole by the side beams (2) and the bottom plate (1); a front panel (5) is arranged in front of the front beam (4); the front beam (4), the rear beam (3), the side beam (2), the front panel (5) and the bottom plate (1) are welded together to form a whole, the whole has high strength and can ensure sealing; a liquid cooling plate (7) is arranged at the lower end of the bottom plate (1); the bottom plate (1) and the liquid cooling plate (7) are separated by a heat insulation component (6) so that the bottom plate (1) and the liquid cooling plate (7) are not in direct contact.

2. A high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature according to claim 1, characterized in that: The upper end of the bottom plate (1) is provided with a middle beam (8) located between the front beam (4) and the rear beam (3).

3. A high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature according to claim 1, characterized in that: Support reinforcing ribs (9) can be added to the bottom plate (1) and the side beam (2) according to actual needs.

4. A high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature according to claim 1, characterized in that: The front panel (5) is provided with a plurality of wire management slots (10).

5. The high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature according to claim 1, characterized in that: The side beams (2), front beams (4), rear beams (3) and middle beams (8) can be connected to the bottom plate (1) by means of friction stir welding, CMT welding, wire welding, laser seaming, or structural adhesive bonding to form a whole having a certain strength.

6. A high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature according to claim 1, characterized in that: The front panel (5) is formed in one step by using a stamping plate.

7. The high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature according to claim 1, characterized in that: The contours at both ends of the rear beam (3) are adapted to and matched with the contours of the surfaces of the two side beams (2).

8. The high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature according to claim 1, characterized in that: The liquid cooling plate (7) is divided into a stamped flow channel plate and an upper flat plate, and the flow channel plate and the upper flat plate are brazed into a whole.

9. The high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature according to claim 1, characterized in that: The thermal insulation component (6) may be made of aerogel, foam, thermal insulation felt, epoxy resin foam layer and low thermal conductivity material.

10. The high-strength liquid-cooled battery pack box tray with heat preservation and uniform temperature according to claim 1, characterized in that: The front beam (4), the rear beam (3) and the middle beam (8) are all provided with a plurality of positioning holes.

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