Double-layer four-liquid cooling plate parallel liquid cooling mechanism of power battery

Abstract

The utility model relates to the technical field of all-terrain vehicle batteries, and particularly discloses a double-layer four-liquid-cooling-plate parallel liquid cooling mechanism of a power battery, which comprises a battery module mechanism, a liquid cooling plate mechanism arranged at the lower end of the battery module mechanism and connected with a water inlet pipe assembly, the water inlet pipe assembly is connected with a water outlet assembly, and the water outlet assembly is connected with a water pump. The liquid cooling plate mechanism is further connected with a water outlet pipe assembly, the water outlet pipe assembly is connected with a water outlet assembly, and the battery module mechanism is further connected with a two-layer support plate; according to the utility model, a double-layer four-liquid-cooling-plate parallel liquid cooling system mechanism is adopted, and the eight modules are divided into an upper layer and a lower layer by using the four liquid cooling plates, so that the battery cells can be uniformly cooled / heated at the same time, the temperature difference between the battery cells is reduced, and the temperature consistency of the battery cells is ensured; the water inlet pipe assembly designed by the double-layer four-liquid-cooling-plate parallel liquid cooling system mechanism can realize shunting and converging of the cooling liquid when the power battery is required to be cooled / heated, and ensures parallel work of the four liquid cooling plates.

Description

Technical Field

[0001] This utility model belongs to the field of all-terrain vehicle battery technology, specifically relating to a double-layer four-liquid-cooling plate parallel liquid cooling mechanism for a power battery. Background Technology

[0002] All-terrain vehicles (ATVs), as special vehicles integrating practicality, entertainment, and sports, can travel on various complex road surfaces such as beaches, grasslands, mountain roads, and tourist sites. Due to their adaptability to different terrains and high flexibility, they have a wide range of applications, currently mainly used in outdoor operations (agriculture, animal husbandry, forestry, hunting, landscaping, exploration, industry, construction, etc.), sports and leisure, fire patrols, military defense, and many other fields.

[0003] During the production of traditional internal combustion engine all-terrain vehicles, the engine emits pollutants such as carbon monoxide, hydrocarbons, nitrogen oxides, and lead, which seriously pollute the environment and human health. With the popularization and deep understanding of the concept of new energy, the electrification of traditional all-terrain vehicles has become a trend. Currently, the power batteries of pure electric all-terrain vehicles on the market generally use lead-acid batteries or low-capacity naturally cooled lithium batteries, and the temperature control effect of their battery liquid cooling systems is not ideal. Utility Model Content

[0004] The purpose of this invention is to provide a parallel liquid cooling mechanism with two layers and four liquid cooling plates for a power battery, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A parallel liquid cooling mechanism with two layers and four liquid cooling plates for a power battery, comprising:

[0007] The battery module structure includes a liquid cooling plate mechanism at its lower end. This mechanism divides the battery module structure into upper and lower layers, with two liquid cooling plates in each layer. Each liquid cooling plate provides liquid cooling and heating for two battery modules. The four liquid cooling plates are arranged in a double-layer parallel configuration, enabling simultaneous and uniform cooling / heating of all eight modules in the battery pack. This avoids large temperature differences between the internal battery cells, ensuring consistent battery temperature and preventing safety accidents. The liquid cooling plate mechanism is connected to a water inlet pipe assembly, which in turn is connected to a water outlet assembly. The liquid cooling plate mechanism is also connected to a water outlet... The water outlet assembly is connected to the water outlet assembly. When the battery cells of the power battery pack need to be heated / cooled, the coolant enters through the water inlet assembly and is simultaneously and in parallel distributed to the four liquid cooling plates on the upper and lower layers through the water inlet assembly, realizing the simultaneous cooling / heating of eight battery modules. Then it enters the water outlet assembly and finally flows out through the water outlet assembly. This can minimize the temperature difference between the cells, ensure the temperature consistency of the power battery system, and avoid excessive local temperature differences that may trigger the temperature protection of the power battery pack, limiting the power of the vehicle or causing thermal runaway. The battery module mechanism is also connected to a second-layer support plate.

[0008] Preferably, the battery module structure includes battery module one, battery module two, battery module three, battery module four, battery module five, battery module six, battery module seven, and battery module eight. Battery module one, battery module two, battery module four, and battery module three are located at the top, and battery module six, battery module five, battery module eight, and battery module seven are located at the bottom, thus dividing the battery module structure into upper and lower layers. Each layer of battery modules has a liquid cooling plate at its lower end. Module fixing bolts are installed on the battery module structure to install adjacent battery modules.

[0009] Preferably, the liquid cooling plate mechanism includes a first liquid cooling plate, a second liquid cooling plate, a third liquid cooling plate, and a fourth liquid cooling plate. The first liquid cooling plate is located at the lower ends of the second and fourth battery modules, the second liquid cooling plate is located at the lower ends of the fourth and third battery modules, the third liquid cooling plate is located at the lower ends of the sixth and fifth battery modules, and the fourth liquid cooling plate is located at the lower ends of the eighth and seventh battery modules. This allows one set of liquid cooling plates to provide liquid cooling and liquid heating for two sets of battery modules, ensuring the consistency of battery temperature and thus preventing safety accidents.

[0010] Preferably, both the inlet assembly and the outlet assembly include a first straight pipe, a sealing ring, a second straight pipe, a 90-degree straight connector, and a connecting flange. The first straight pipe is connected to the second straight pipe via the 90-degree straight connector. The outer end of the first straight pipe is connected to the connecting flange for easy connection with the connector. The inner side of the connecting flange is connected to the sealing ring to achieve sealing between the battery pack thermal piping system and the battery pack housing. The inlet assembly is constructed using a rigid pipe welding process, whereby the various components are welded together and then connected to the battery pack housing via the connecting flange and fixing bolts.

[0011] Preferably, the water inlet pipe assembly includes a set of pipes, a set of inlets, and four sets of outlets. The four sets of outlets are respectively connected to four sets of liquid cooling plates, which facilitates the simultaneous injection of coolant into the four sets of liquid cooling plates, thereby realizing dual-layer parallel liquid cooling / liquid heating. The dual-layer parallel liquid cooling system mechanism for power batteries provided in this application has a simple structure and can solve the cooling / heating problem of large-scale integrated power battery systems, ensuring the stability of the power battery system.

[0012] Preferably, the first liquid cooling plate, the second liquid cooling plate, the third liquid cooling plate, and the fourth liquid cooling plate each include four sets of U-shaped flow channels, which facilitates the uniform entry of coolant into the flow channels inside the liquid cooling plate, enabling efficient and uniform cooling / heating of the battery cells, effectively controlling the temperature difference between the battery cells, and ensuring the consistency of the battery cell operating temperature.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The power battery of the pure electric all-terrain vehicle adopts a double-layer four-liquid-plate parallel liquid cooling system. The eight modules are arranged in two layers with four liquid cooling plates, which can cool / heat the cells at the same time and evenly, reduce the temperature difference between cells, and ensure the consistency of cell temperature.

[0015] 2. The water inlet pipe assembly of the double-layer four-liquid-cooling-plate parallel liquid cooling system can realize the diversion and convergence of coolant when the power battery needs cooling / heating, and ensure that the four liquid cooling plates work in parallel.

[0016] 3. The liquid cooling plate adopts aluminum alloy stamping and welding process, which has a simple structure and can significantly reduce production costs. At the same time, the liquid cooling plate adopts a four-group U-shaped loop flow channel design, which can effectively control the temperature consistency of the battery cells. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the water inlet assembly of this utility model;

[0019] Figure 3This is an enlarged schematic diagram of the water inlet pipe assembly of this utility model;

[0020] Figure 4 This is a partial cross-sectional view of the liquid cooling plate of this utility model;

[0021] In the diagram: 1. Inlet assembly; 2. Liquid cooling plate three; 3. Inlet pipe assembly; 4. Liquid cooling plate one; 5. Battery module one; 6. Battery module two; 7. Battery module four; 8. Battery module three; 9. Module fixing bolts; 10. Battery module eight; 11. Battery module seven; 12. Liquid cooling plate two; 13. Liquid cooling plate four; 14. Outlet pipe assembly; 15. Second-layer support plate; 16. Battery module six; 17. Battery module five; 18. Outlet assembly;

[0022] 101. Straight pipe one; 102. Sealing ring; 103. Straight pipe two; 104. 90-degree straight pipe; 105. Connecting flange. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example:

[0025] Please see Figures 1-4 As shown, a parallel liquid cooling mechanism with two layers of four liquid cooling plates for a power battery includes:

[0026] The battery module structure includes a liquid cooling plate mechanism at its lower end. This mechanism divides the battery module structure into upper and lower layers, with two liquid cooling plates on each layer. Each liquid cooling plate provides liquid cooling and heating for two battery modules. The four liquid cooling plates are arranged in a double-layer parallel configuration, enabling simultaneous and uniform cooling / heating of all eight modules in the battery pack. This avoids large temperature differences between the internal cells, ensuring consistent battery temperature and preventing safety accidents. The liquid cooling plate mechanism is connected to a water inlet pipe assembly 3, which in turn is connected to a water outlet assembly 18. The liquid cooling plate mechanism is also connected to a water outlet pipe assembly 14, which discharges water... The pipe assembly 14 is connected to the outlet assembly 18. When the power battery pack cells need to be heated / cooled, the coolant enters through the inlet assembly 1 and is simultaneously distributed to the four liquid cooling plates on the upper and lower layers through the inlet pipe assembly 3, so as to achieve simultaneous cooling / heating of eight battery modules. Then it enters the outlet pipe assembly 14 and finally flows out through the outlet assembly 18. This can minimize the temperature difference between the cells, ensure the temperature consistency of the power battery system, and avoid excessive local temperature difference that may trigger the temperature protection of the power battery pack to limit the power of the vehicle or cause thermal runaway. The battery module mechanism is also connected to the second-layer support plate 15.

[0027] The purpose of this application is to establish a double-layer, four-liquid-plate parallel liquid cooling system for power batteries, which can effectively control the charging and discharging temperature of the cells, allowing them to operate within a comfortable charging and discharging range (battery application environment temperature controlled between 5 and 30°C). It features large capacity, high density, long range, short charging time, long service life, and no pollution, and can meet the power requirements for driving on various complex road surfaces such as beaches, grasslands, mountain roads, and tourist sites.

[0028] refer to Figures 1-4 As shown, the battery module structure includes battery module 5, battery module 6, battery module 8, battery module 4, battery module 5, battery module 6, battery module 7, and battery module 8. Battery modules 5, 6, 7, and 8 are located at the top, while battery modules 6, 17, 8, and 7 are located at the bottom, thus dividing the battery module structure into upper and lower layers. Each layer of battery modules has a liquid cooling plate at its lower end. Module fixing bolts 9 are installed on the battery module structure to install adjacent battery modules.

[0029] refer to Figures 1-4As shown, the liquid cooling plate mechanism includes liquid cooling plate 4, liquid cooling plate 12, liquid cooling plate 2, and liquid cooling plate 4 13. Liquid cooling plate 4 is located at the lower end of battery module 6 and battery module 7, liquid cooling plate 2 12 is located at the lower end of battery module 7 and battery module 3 8, liquid cooling plate 2 is located at the lower end of battery module 6 and battery module 5 17, and liquid cooling plate 4 13 is located at the lower end of battery module 8 10 and battery module 7 11. This enables one set of liquid cooling plates to provide liquid cooling and liquid heating for two sets of battery modules, ensuring the consistency of battery temperature and thus avoiding safety accidents.

[0030] refer to Figures 1-4 As shown, both the inlet assembly 1 and the outlet assembly 18 include a straight pipe 101, a sealing ring 102, a straight pipe 2 103, a 90-degree straight pipe 104, and a connecting flange 105. The straight pipe 101 is connected to the straight pipe 2 103 through the 90-degree straight pipe 104. The outer end of the straight pipe 101 is connected to the connecting flange 105 for easy connection with the connector. The inner side of the connecting flange 105 is connected to the sealing ring 102 to achieve the sealing between the battery pack thermal piping system mechanism and the battery pack housing. The inlet assembly 1 adopts a hard pipe welding process, and after welding the various components, it is connected to the battery pack housing through the connecting flange 105 and fixing bolts.

[0031] refer to Figures 1-4 As shown, the water inlet pipe assembly 3 includes a set of pipes, a set of inlets, and four sets of outlets. The four sets of outlets are respectively connected to four sets of liquid cooling plates, which facilitates the simultaneous injection of coolant into the four sets of liquid cooling plates, thereby realizing dual-layer parallel liquid cooling / liquid heating. The dual-layer parallel liquid cooling system mechanism for power batteries provided in this application has a simple structure and can solve the cooling / heating problem of large-scale integrated power battery systems, ensuring the stability of the power battery system.

[0032] refer to Figures 1-4 As shown, liquid cooling plate 1 (4), liquid cooling plate 2 (12), liquid cooling plate 3 (2), and liquid cooling plate 4 (13) all include four sets of U-shaped flow channels. That is, the liquid enters through one inlet and then flows through four sets of U-shaped flow channels. This is conducive to the uniform entry of coolant into the flow channels inside the liquid cooling plate, which can efficiently and uniformly cool / heat the battery cells. It can effectively control the temperature difference between the battery cells and ensure the consistency of the battery cell operating temperature. In addition, the liquid cooling plate adopts aluminum alloy stamping and welding process, which has a simple structure and can significantly reduce production costs.

[0033] Pure electric all-terrain vehicles using lithium-ion battery packs can solve the environmental pollution problems caused by emissions from traditional internal combustion engine all-terrain vehicles, as well as the problems of low specific energy, short driving range, long charging time, and short cycle life of lead-acid batteries.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-layer four-liquid-cooled-plate parallel liquid cooling mechanism of a power battery, characterized in that, The battery module mechanism is provided with a liquid cooling plate mechanism at the lower end, the liquid cooling plate mechanism is connected with a water inlet pipe assembly (3), the water inlet pipe assembly (3) is connected with the water outlet assembly (18), the liquid cooling plate mechanism is also connected with a water outlet pipe assembly (14), the water outlet pipe assembly (14) is connected with the water outlet assembly (18), and the battery module mechanism is also connected with a two-layer support plate (15). The battery module mechanism includes battery module one (5), battery module two (6), battery module three (8), battery module four (7), battery module five (17), battery module six (16), battery module seven (11) and battery module eight (10), the battery module one (5), the battery module two (6), the battery module four (7) and the battery module three (8) are located above, the battery module six (16), battery module five (17), the battery module eight (10) and the battery module seven (11) are located below, and the battery module mechanism is provided with a module fixing bolt (9) on the upper end.

2. The double-layer four-liquid-cooling-plate parallel liquid cooling mechanism of a power battery according to claim 1, characterized in that: The liquid cooling plate mechanism includes liquid cooling plate one (4), liquid cooling plate two (12), liquid cooling plate three (2) and liquid cooling plate four (13), the liquid cooling plate one (4) is located at the lower end of the battery module two (6) and the battery module four (7), the liquid cooling plate two (12) is located at the lower end of the battery module four (7) and the battery module three (8), the liquid cooling plate three (2) is located at the lower end of the battery module six (16) and the battery module five (17), and the liquid cooling plate four (13) is located at the lower end of the battery module eight (10) and the battery module seven (11).

3. The double-layer four-liquid-cooling-plate parallel liquid cooling mechanism of a power battery according to claim 2, characterized in that: The water inlet assembly (1) and the water outlet assembly (18) each include a straight pipe one (101), a sealing ring (102), a straight pipe two (103), a 90-degree straight-through (104) and a connection flange (105), the straight pipe one (101) is connected with the straight pipe two (103) through the 90-degree straight-through (104), the outer end of the straight pipe one (101) is connected with the connection flange (105), and the inner side of the connection flange (105) is connected with the sealing ring (102).

4. The double-layer four-liquid-cooling-plate parallel liquid cooling mechanism of a power battery according to claim 3, characterized in that: The water inlet pipe assembly (3) includes a group of pipes, a group of inlets and four groups of outlets.

5. The double-layer four-liquid-cooling-plate parallel liquid cooling mechanism of a power battery according to claim 4, characterized in that: The liquid cooling plate one (4), the liquid cooling plate two (12), the liquid cooling plate three (2) and the liquid cooling plate four (13) each include four groups of U-shaped flow channels.

6. The double-layer four-liquid-cooling-plate parallel liquid cooling mechanism of a power battery according to claim 5, characterized in that: ​

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