A thermoplastic composite battery box with integrated liquid cooling function

Abstract

The present invention relates to the technical field of thermoplastic composite battery cases, and in particular to a thermoplastic composite battery case with integrated liquid cooling function. Technical solution: A thermoplastic composite battery case with integrated liquid cooling function, comprising a thermoplastic case assembly, a sealing plate, and reinforcing ribs; a sealing plate is provided on the upper end surface of the thermoplastic case assembly; the thermoplastic case assembly comprises a thermoplastic outer shell of an energy storage battery, a cooling trough, a case frame, a water channel, a first water trough, a second water trough, a coolant inlet and outlet pipe, a water channel diversion support raised strip, a hoisting hole, and a positioning column. The thermoplastic case assembly is made of a glass fiber modified and reinforced thermoplastic resin material through a one-time compression molding process using an LFT-D-CM mixed molding process. The present invention separates the thermoplastic case assembly from the energy storage battery pack through a sealing plate, and directly uses the integrally formed thermoplastic case assembly as a liquid cooling container for heat dissipation, thereby reducing the setting of additional metal heat dissipation modules, reducing costs and processing difficulties.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermoplastic composite battery cases, and in particular relates to a thermoplastic composite battery case with an integrated liquid cooling function. Background Art

[0002] Existing lower box solutions for liquid-cooled energy storage batteries are almost all made of a metal box frame and a metal liquid cooling plate connected by welding or bolts, or made of a metal liquid cooling plate as the bottom and then welded with additional fixing and connection points. The metal liquid cooling plate is made of aluminum alloy, and the metal frame is mainly made of aluminum alloy. The metal box is heavy, and the carbon emissions from the production and subsequent processing of aluminum alloy are very high, which is not in line with the technical trend of energy conservation, environmental protection, and reducing carbon emissions. At the same time, in order to prevent condensation on the back (or bottom) of the low-temperature liquid cooling plate during the battery cooling process, it is necessary to spray an additional insulation coating on the bottom of the box or liquid cooling plate or design an additional insulation structure, which further increases costs and carbon emissions.

[0003] Therefore, for the above-mentioned existing energy storage battery box, since an additional liquid cooling plate is required for battery cooling and heating, resulting in high production costs and poor thermal insulation performance, a thermoplastic composite battery box with integrated liquid cooling function can be designed. Summary of the invention

[0004] In order to overcome the problems of existing energy storage battery boxes, an additional liquid cooling plate is required for battery cooling and heating, resulting in high production costs and poor thermal insulation performance.

[0005] The technical solution of the present invention is: a thermoplastic composite battery case with integrated liquid cooling function, including a thermoplastic case assembly, a sealing plate, and reinforcing ribs; a sealing plate is arranged on the upper end surface of the thermoplastic case assembly; the thermoplastic case assembly includes a thermoplastic shell of an energy storage battery, a cooling groove, a case frame, a water channel, a first water groove, a second water groove, a coolant inlet and outlet pipe, a water channel diversion support raised strip, a lifting hole, and a positioning column; the sealing plate includes an aluminum alloy heat-conducting sealing plate, a sealing bolt positioning hole, and a positioning notch; the thermoplastic case assembly as a whole is made of a glass fiber modified and reinforced thermoplastic resin material through a one-time compression molding process using an LFT-D-CM hybrid compression molding process.

[0006] Preferably, the thermoplastic box assembly is separated from the energy storage battery pack by a sealing plate, and the one-piece thermoplastic box assembly is directly used as a liquid cooling container for heat dissipation, thereby reducing the setting of additional metal heat dissipation modules, reducing costs and processing difficulties, and solving the problem of high production costs and poor thermal insulation performance of existing energy storage battery boxes due to the need for additional liquid cooling plates for battery cooling and heating.

[0007] Preferably, a cooling groove is provided inside the upper end surface of the thermoplastic shell of the energy storage battery; a water channel is provided inside the cooling groove; a first water groove and a second water groove are provided at the head and tail ends of the water channel respectively, and the first water groove and the second water groove are connected with the head and tail ends of the water channel; a coolant inlet and outlet water pipe is provided on one side of the thermoplastic shell of the energy storage battery, and the coolant inlet and outlet water pipe are connected with the first water groove and the second water groove respectively; a lifting hole is provided on the front end surface of the thermoplastic shell of the energy storage battery, and there are two lifting holes, and the lifting hole is integrally formed with the thermoplastic shell of the energy storage battery.

[0008] Preferably, the upper end surface of the water channel is provided with a water channel diversion support protrusion strip, and the water channel diversion support protrusion strip is integrally formed with the thermoplastic shell of the energy storage battery.

[0009] Preferably, positioning posts are integrally formed on both sides of the upper end surface of the thermoplastic shell of the energy storage battery; and a box frame is integrally formed with thermoplastic around the outer periphery of the upper end surface of the thermoplastic shell of the energy storage battery.

[0010] Preferably, an aluminum alloy heat-conducting sealing plate is provided above the cooling groove; a positioning notch is provided on one side of the aluminum alloy heat-conducting sealing plate, and the positioning notch is positioned and spliced ​​with the positioning column.

[0011] Preferably, sealing bolt positioning holes are evenly distributed inside the aluminum alloy thermal conductive sealing plate, the sealing bolt positioning holes are integrally formed with the aluminum alloy thermal conductive sealing plate, and the aluminum alloy thermal conductive sealing plate is sealed and fixed to the cooling groove by waterproof sealing bolts passing through the sealing bolt positioning holes, and the aluminum alloy thermal conductive sealing plate and the cooling groove are adhesively and sealedly connected by waterproof sealant.

[0012] Preferably, the lower end surface of the thermoplastic shell of the energy storage battery is provided with reinforcing ribs, and the reinforcing ribs are integrally formed with the thermoplastic shell of the energy storage battery.

[0013] Beneficial effects of the present invention: 1. The existing energy storage battery box has the problem of high production cost and poor thermal insulation performance due to the need for an additional liquid cooling plate when cooling and heating the battery; the thermoplastic box assembly is separated from the energy storage battery pack by a sealing plate, and the one-piece thermoplastic box assembly is directly used as a liquid cooling container for heat dissipation, thereby reducing the setting of additional metal heat dissipation modules, reducing costs and processing difficulties; the coolant flowing inside the water channel is exchanged through the coolant inlet and outlet pipes, and the coolant takes away the heat emitted by the energy storage battery absorbed by the aluminum alloy heat conductive sealing plate when circulating inside the water channel; the problem of high production cost and poor thermal insulation performance due to the need for an additional liquid cooling plate when cooling and heating the battery in the existing energy storage battery box is solved; 2. Compared with the existing metal lower box solutions on the market, the present invention does not have a separate liquid cooling metal plate, but integrates the liquid cooling function with the box structure, thereby reducing the weight and cost of the energy storage battery box; 3. The glass fiber modified and reinforced thermoplastic resin composite material of the present invention has a low thermal conductivity coefficient, so that the box material has a certain thermal insulation performance, and there is no need to design an additional structure to prevent condensation, thereby reducing the weight and cost of the energy storage battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shown is a schematic diagram of the overall three-dimensional structure of a thermoplastic composite battery box with integrated liquid cooling function of the present invention; Figure 2 Shown is a schematic diagram of the overall bottom-up stereoscopic structure of a thermoplastic composite battery box with integrated liquid cooling function of the present invention; Figure 3 Shown is a schematic diagram of the three-dimensional structure of a thermoplastic case assembly of a thermoplastic composite battery case with integrated liquid cooling function of the present invention; Figure 4 Shown is a schematic diagram of the three-dimensional structure of a sealing plate of a thermoplastic composite battery box with integrated liquid cooling function of the present invention; Figure 5 Shown is a bottom-up stereoscopic structural schematic diagram of a sealing plate of a thermoplastic composite battery box with integrated liquid cooling function according to the present invention; Figure 6 Shown is a schematic diagram of the three-dimensional structure of the coolant inlet and outlet pipes of a thermoplastic composite battery box with integrated liquid cooling function of the present invention.

[0015] The markings in the attached drawings are: 1. Thermoplastic box assembly; 2. Sealing plate; 3. Reinforcing ribs; 101. Thermoplastic shell of energy storage battery; 102. Cooling groove; 103. Box frame; 104. Water channel; 105. First water groove; 106. Second water groove; 107. Coolant inlet and outlet pipes; 108. Water channel diversion support raised strip; 109. Lifting hole; 110. Positioning column; 201. Aluminum alloy thermal conductive sealing plate; 202. Sealing bolt positioning hole; 203. Positioning notch. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] See also Figure 1-6The present invention provides an embodiment: a thermoplastic composite battery box with integrated liquid cooling function, including a thermoplastic box assembly 1, a sealing plate 2, and a reinforcing rib 3; the upper end surface of the thermoplastic box assembly 1 is provided with a sealing plate 2; the thermoplastic box assembly 1 includes a thermoplastic shell 101 of an energy storage battery, a cooling groove 102, a box frame 103, a water channel 104, a first water groove 105, a second water groove 106, a coolant inlet and outlet pipe 107, a water channel diversion support protrusion strip 108, a hoisting hole 109, and a positioning column 110; the sealing plate 2 includes an aluminum alloy heat-conducting sealing plate 201, a sealing bolt positioning hole 202, and a positioning notch 203; the thermoplastic box assembly 1 is made of a glass fiber modified and reinforced thermoplastic resin material through a one-time compression molding process using an LFT-D-CM hybrid compression molding process.

[0018] See also Figure 1-6 In this embodiment, a cooling groove 102 is provided inside the upper end surface of the energy storage battery thermoplastic shell 101; a water channel 104 is provided inside the cooling groove 102; a first water groove 105 and a second water groove 106 are provided at both ends of the water channel 104, and the first water groove 105 and the second water groove 106 are connected to both ends of the water channel 104; a coolant inlet and outlet pipe 107 is provided on one side of the energy storage battery thermoplastic shell 101, and the coolant inlet and outlet pipe 107 is connected to the first water groove 105 and the second water groove 106 respectively; a hoisting hole 109 is provided on the front end surface of the energy storage battery thermoplastic shell 101, and two hoisting holes 109 are provided, and the hoisting hole 109 is integrally formed with the energy storage battery thermoplastic shell 101.

[0019] See also Figure 1-6 In this embodiment, the upper end surface of the water channel 104 is provided with a water channel diversion support protrusion strip 108, and the water channel diversion support protrusion strip 108 is integrally formed with the energy storage battery thermoplastic shell 101; both sides of the upper end surface of the energy storage battery thermoplastic shell 101 are integrally formed with positioning columns 110; the upper end surface of the energy storage battery thermoplastic shell 101 is thermoplastically integrally formed with a box frame 103 around the outer periphery of the upper end surface of the energy storage battery thermoplastic shell 101; an aluminum alloy heat conductive sealing plate 201 is provided above the cooling groove 102; a positioning notch 203 is provided on one side of the aluminum alloy heat conductive sealing plate 201, and the positioning notch 203 is positioned with the positioning column 110. The aluminum alloy heat-conducting sealing plate 201 is evenly distributed with sealing bolt positioning holes 202, and the sealing bolt positioning holes 202 are integrally formed with the aluminum alloy heat-conducting sealing plate 201. The aluminum alloy heat-conducting sealing plate 201 is sealed and fixed to the cooling groove 102 by passing waterproof sealing bolts through the sealing bolt positioning holes 202, and the aluminum alloy heat-conducting sealing plate 201 and the cooling groove 102 are sealed and connected by waterproof sealing adhesive; the lower end surface of the energy storage battery thermoplastic shell 101 is provided with reinforcing ribs 3, and the reinforcing ribs 3 are integrally formed with the energy storage battery thermoplastic shell 101.

[0020] During operation, the thermoplastic box assembly 1 is separated from the energy storage battery pack by the sealing plate 2, and the integrally formed thermoplastic box assembly 1 is directly used as a liquid cooling container for heat dissipation, thereby reducing the setting of an additional metal heat dissipation module, reducing costs and processing difficulties; the coolant flowing inside the water channel 104 is exchanged through the coolant inlet and outlet pipes 107, and the coolant takes away the heat emitted by the energy storage battery absorbed by the aluminum alloy heat conductive sealing plate 201 when circulating inside the water channel 104; the problem of high production cost and poor thermal insulation performance of the existing energy storage battery box due to the need for an additional liquid cooling plate when cooling and heating the battery is solved; Compared with the existing metal lower box solutions on the market, the present invention does not have a separate liquid cooling metal plate, but integrates the liquid cooling function with the box structure; the weight and cost of the energy storage battery box are reduced; the glass fiber modified and reinforced thermoplastic resin composite material itself has a low thermal conductivity coefficient, so that the box material has a certain thermal insulation performance, and there is no need to additionally design a structure to prevent condensation, thereby reducing the weight and cost of the energy storage battery box.

[0021] Through the above steps, the thermoplastic box assembly 1 is separated from the energy storage battery pack through the sealing plate 2, and the one-piece thermoplastic box assembly 1 is directly used as a liquid cooling container for heat dissipation, thereby reducing the setting of additional metal heat dissipation modules, reducing costs and processing difficulties, and avoiding the existing energy storage battery box. The problem of high production cost and poor thermal insulation performance due to the need for additional liquid cooling plates when cooling and heating the battery is avoided.

[0022] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A thermoplastic composite battery case with integrated liquid cooling function, comprising a thermoplastic case component (1), characterized in that: The invention also comprises a sealing plate (2) and reinforcing ribs (3); the sealing plate (2) is arranged on the upper end surface of the thermoplastic box assembly (1); the thermoplastic box assembly (1) comprises a thermoplastic shell (101) of an energy storage battery, a cooling groove (102), a box frame (103), a water channel (104), a first water groove (105), a second water groove (106), a cooling liquid inlet and outlet pipe (107), a water channel diversion support protruding strip (108), a lifting hole (109), and a positioning column (110); the sealing plate (2) comprises an aluminum alloy heat-conducting sealing plate (201), a sealing bolt positioning hole (202), and a positioning notch (203); the thermoplastic box assembly (1) is made of a glass fiber modified and reinforced thermoplastic resin material through a one-time compression molding process using an LFT-D-CM hybrid compression molding process.

2. The thermoplastic composite battery box with integrated liquid cooling function according to claim 1, characterized in that: A cooling groove (102) is provided inside the upper end surface of the energy storage battery thermoplastic shell (101); a water channel (104) is provided inside the cooling groove (102); a first water groove (105) and a second water groove (106) are provided at the head and tail ends of the water channel (104), respectively, and the first water groove (105) and the second water groove (106) are connected to the head and tail ends of the water channel (104); a cooling liquid inlet and outlet pipe (107) is provided on one side of the energy storage battery thermoplastic shell (101), and the cooling liquid inlet and outlet pipe (107) is connected to the first water groove (105) and the second water groove (106) respectively; a hoisting hole (109) is provided on the front end surface of the energy storage battery thermoplastic shell (101), and two hoisting holes (109) are provided, and the hoisting holes (109) and the energy storage battery thermoplastic shell (101) are integrally formed.

3. The thermoplastic composite battery box with integrated liquid cooling function according to claim 2, characterized in that: The upper end surface of the water channel (104) is provided with a water channel flow diversion support protruding strip (108), and the water channel flow diversion support protruding strip (108) and the energy storage battery thermoplastic shell (101) are integrally formed.

4. The thermoplastic composite battery box with integrated liquid cooling function according to claim 1, characterized in that: Positioning posts (110) are integrally formed on both sides of the upper end surface of the energy storage battery thermoplastic shell (101); and a box frame (103) is integrally formed around the outer periphery of the upper end surface of the energy storage battery thermoplastic shell (101).

5. The thermoplastic composite battery box with integrated liquid cooling function according to claim 2, characterized in that: An aluminum alloy heat-conducting sealing plate (201) is arranged above the cooling groove (102); a positioning notch (203) is arranged on one side of the aluminum alloy heat-conducting sealing plate (201), and the positioning notch (203) is positioned, spliced ​​and connected to the positioning column (110).

6. The thermoplastic composite battery box with integrated liquid cooling function according to claim 5, characterized in that: The aluminum alloy heat-conducting sealing plate (201) is evenly distributed with sealing bolt positioning holes (202), the sealing bolt positioning holes (202) and the aluminum alloy heat-conducting sealing plate (201) are integrally formed, and the aluminum alloy heat-conducting sealing plate (201) is sealed and fixed to the cooling groove (102) by waterproof sealing bolts passing through the sealing bolt positioning holes (202), and the aluminum alloy heat-conducting sealing plate (201) and the cooling groove (102) are bonded and sealed by waterproof sealant.

7. The thermoplastic composite battery box with integrated liquid cooling function according to claim 1, characterized in that: A reinforcing rib (3) is provided on the lower end surface of the energy storage battery thermoplastic shell (101), and the reinforcing rib (3) and the energy storage battery thermoplastic shell (101) are integrally formed.

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