Battery direct cooling system and control method

Abstract

The invention relates to the technical field of battery direct cooling, in particular to a battery direct cooling system and a control method. Comprising a direct cooling plate; the direct cooling plate is provided with a refrigerant flow channel and a condensate water flow channel, a refrigerant flows in the refrigerant flow channel, and the refrigerant flow channel is communicated with a refrigerant inlet and a refrigerant outlet in the direct cooling plate; condensate water discharged by the air conditioning system flows in the condensate water runner, and a water inlet structure and a water outlet structure are arranged on the condensate water runner. The battery direct cooling system is simple in structure, condensate water of an air conditioning system can be fully utilized for cooling the battery pack, the cooling energy consumption of the battery pack is reduced to the maximum extent, the heat exchange efficiency is extremely high, the weight is light, the cost advantage is great, the system power consumption can be effectively reduced, the battery temperature is kept optimal, and the service life of the battery pack is prolonged. Therefore, the endurance mileage of the whole vehicle is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery direct cooling, and specifically to a battery direct cooling system and a control method. Background Art

[0002] Power batteries are the power source of new energy vehicles. On the one hand, in order to increase the vehicle's cruising range, the vehicle needs to arrange as many battery cells as possible in a certain space, so the space of the battery pack is very limited. The battery will generate a lot of heat during the operation of the vehicle and accumulate in a relatively small space over time; on the other hand, in order to shorten the charging time of electric vehicles to the greatest extent, the battery is charged at a high rate, causing the heat generated by the battery to soar sharply. If this heat cannot be dissipated in time, the battery temperature will be too high, greatly affecting the battery's power and life. In severe cases, there is also a risk of thermal runaway. Therefore, the battery needs to be cooled. In the relevant technology, the battery heat dissipation methods include air cooling, water cooling and direct cooling. Among them, air cooling heat dissipation is to achieve the effect of heat exchange cooling by flowing cold air through the surface of the battery. Water cooling heat dissipation is generally indirect heat dissipation. The heat generated by the battery is transferred to the cooling system through the cooling system, and then the heat is transferred to the refrigerant in the battery cooler through the battery cooler. Finally, the heat is dissipated to the air by the condenser. The two heat dissipation methods of air cooling and water cooling are less efficient, and direct cooling heat dissipation is direct heat exchange. That is, in the direct cooling system, the compressor drives the refrigerant to condense through the condenser first, and then enters the direct cooling plate after the expansion valve to directly dissipate the heat of the battery. The refrigerant heat exchange is phase change heat exchange, which has the advantages of high heat dissipation efficiency, strong heat exchange capacity and low cost. Therefore, battery direct cooling technology has been quickly put on the agenda.

[0003] However, the direct cooling system mainly uses the principle of latent heat of refrigerant evaporation. The cooler evaporates in the direct cooling plate to quickly take away the heat of the battery and complete the cooling of the battery. At present, the most widely used direct cooling plate for batteries in the market is in the form of profile + welding, mainly with harmonica tube structure design and stamping flow channel plate design. The direct cooling plate for batteries is mainly arranged at the bottom, side and top of the battery cell, including the embedded structure design of the direct cooling plate. As for the direct cooling plate for batteries, the cooling and heating functions of the battery thermal management are mainly realized through the imported refrigerant of the battery. When the battery is cooled, it is mainly cooled by steam compression through the air-conditioning compressor, and heat exchange with the refrigerant in the direct cooling plate of the battery is carried out through throttling expansion by the electronic expansion valve to realize battery cooling. That is, no matter what the case, the refrigerant can only absorb the heat of the battery cell, and then exchange heat with the thermal management system to achieve the cooling effect. The battery pack can only be cooled by electric compressor cooling, and the battery cooling function can be realized by direct cooling. Although the direct cooling method using electric compressors has high cooling efficiency and can be well applied when the vehicle is driving at high speed or fast charging, in normal situations when the battery pack does not generate much heat, if the electric compressor cooling method is directly used, it is a bit excessive and may also cause energy waste. Summary of the invention

[0004] The purpose of this application is to solve the shortcomings of the above-mentioned background technology and provide a battery direct cooling system and control method

[0005] The technical solution of the present application is: a battery direct cooling system, comprising a direct cooling plate; the direct cooling plate is provided with:

[0006] A refrigerant flow channel, wherein the refrigerant flows through the refrigerant flow channel, and the refrigerant flow channel is connected to a refrigerant inlet and a refrigerant outlet on the direct cooling plate;

[0007] The condensed water flow channel has condensed water discharged from the air conditioning system flowing therein, and the condensed water flow channel is provided with a water inlet structure and a water outlet structure.

[0008] According to a battery direct cooling system provided in the present application, the condensing water flow channel includes a plurality of first flow channels; the first flow channel is a straight flow channel extending along a first direction of a direct cooling plate, one end of the first flow channel is connected to a water inlet structure, and the other end is connected to a water outlet structure, and the plurality of first flow channels are evenly spaced on the direct cooling plate along a second direction of the direct cooling plate; the first direction and the second direction are perpendicular to each other.

[0009] According to a battery direct cooling system provided in the present application, the condensation water flow channel includes two groups of first flow channels, and the two groups of first flow channels are arranged on both sides of the first direction center line of the direct cooling plate, and each group includes a plurality of first flow channels arranged at equal intervals along the second direction.

[0010] According to a battery direct cooling system provided in the present application, the water inlet structure includes a water inlet collecting pipe welded to the bottom surface of the direct cooling plate; the water inlet collecting pipe is a straight pipe arranged along the second direction, one side of the water inlet collecting pipe is connected to the water inlet on the direct cooling plate, and the other side is connected to the water inlet end of all the first flow channels.

[0011] According to a battery direct cooling system provided by the present application, the connection point between the water inlet manifold and the water inlet is located between the two groups of first flow channels.

[0012] According to a battery direct cooling system provided in the present application, the water outlet structure includes a water outlet collecting pipe welded to the bottom surface of the direct cooling plate; the water outlet collecting pipe is a straight pipe arranged along the second direction, one side of the water outlet collecting pipe is connected to the water outlet end of all the first flow channels, and a drain outlet for discharging condensed water is provided on the water outlet collecting pipe.

[0013] According to a battery direct cooling system provided in the present application, drainage outlets are provided at both ends of the water outlet manifold.

[0014] According to a battery direct cooling system provided in the present application, the drain port is a hole-shaped structure opened at both ends of the water outlet manifold and higher than the bottom of the water outlet manifold.

[0015] According to a battery direct cooling system provided by the present application, the refrigerant inlet and the refrigerant outlet are located on the same side of the direct cooling plate.

[0016] According to a battery direct cooling system provided in the present application, the refrigerant flow channel includes a second flow channel at one end connected to the refrigerant inlet and through which the internal refrigerant flows from the refrigerant inlet along a first direction, and a return flow channel at one end connected to the other end of the second flow channel and the other end connected to the refrigerant outlet; a plurality of second flow channels arranged at intervals along the second direction and a plurality of return flow channels arranged at intervals along the second direction are arranged on the direct cooling plate.

[0017] According to a battery direct cooling system provided in the present application, the first flow channel of the condensation water flow channel is located between two adjacent second flow channels.

[0018] According to a battery direct cooling system provided in the present application, two groups of refrigerant flow channels are arranged on the direct cooling plate, and the two groups of refrigerant flow channels are respectively placed on both sides of the first center line of the direct cooling plate.

[0019] According to a battery direct cooling system provided in the present application, the refrigerant flow channel includes a first baffle flow channel located on both sides of the first direction of the direct cooling plate and a second baffle flow channel located on both sides of the first direction of the fixed structure on the side of the direct cooling plate; the first baffle flow channel and the second baffle flow channel are curved flow channel structures that include both the flow channel along the first direction and the flow channel along the second direction.

[0020] According to a battery direct cooling system provided in the present application, a fixed structure is arranged on the direct cooling plate; the fixed structure includes an intermediate fixed structure located on the first direction center line of the direct cooling plate and a side fixed structure symmetrically arranged with the first direction center line of the direct cooling plate as the center; the intermediate fixed structure includes a plurality of first fixed points equidistantly arranged along the first direction; the side fixed structure includes a group of second fixed points.

[0021] According to a battery direct cooling system provided in the present application, the refrigerant flow channel and the condensed water flow channel are evenly distributed between the middle fixed structure and the side fixed structure.

[0022] The present application also provides a control method, which is used in the above-mentioned battery direct cooling system to cool down the battery, comprising:

[0023] Get the air conditioning mode and battery pack temperature;

[0024] When the passenger compartment is in air conditioning cooling mode and the battery pack temperature is lower than a set value, the condensate flow channel is opened to cool the battery pack with condensate generated by air conditioning cooling, and the refrigerant flow channel is closed;

[0025] When the passenger compartment is in the air-conditioning cooling mode and the battery pack temperature is not less than the set value, the condensate flow channel and the refrigerant flow channel are opened so that the condensate generated by the air-conditioning and the refrigerant work together to cool the battery pack.

[0026] According to a control method provided by the present application, the set value is 35°C.

[0027] The advantages of the present application are as follows: 1. The battery direct cooling system of the present application controls the temperature of the battery pack through a direct cooling plate. The direct cooling plate can not only control the temperature of the battery pack through the refrigerant, but also can control the temperature of the battery pack through the condensed water generated by the air-conditioning system. When the air-conditioning system is in cooling mode and the battery pack does not generate much heat, the condensed water can be used for cooling, which reduces energy consumption to the greatest extent, so that the battery pack temperature is always maintained at an optimal state, thereby improving the driving range of the whole vehicle; when the air-conditioning system is in cooling mode and the battery pack generates a lot of heat, dual regulation can be performed through refrigerant and condensed water, the battery pack temperature can drop quickly, and is always within the optimal temperature range, and the battery pack temperature control and regulation is more efficient;

[0028] 2. The condensed water flow channel designed in this application is a single-circulation flow channel structure. The condensed water enters from one side of the first flow channel and flows out from the other side of the first flow channel. The flow of the condensed water in the first flow channel is a straight line flow with extremely small flow resistance pressure. The condensed water can be quickly filled into the first flow channel, and the battery pack is quickly and evenly cooled on the direct cooling plate, and the heat exchange efficiency with the battery pack is extremely high;

[0029] 3. The condensation water flow channel of the present application is two groups of first flow channels, and the two groups of first flow channels are arranged in blocks according to the battery pack cell arrangement structure. On the one hand, the battery pack can be cooled more evenly, and on the other hand, it is convenient to arrange a fixed structure on the direct cooling plate, making the installation of the entire direct cooling plate easier, and it is convenient for condensation water to enter the first flow channel. After the condensation water flows out of the air conditioning system, it can be evenly dispersed in each first flow channel;

[0030] 4. The water inlet structure of the present application includes a water inlet manifold, which is used to evenly distribute the condensed water discharged from the air-conditioning system into each first flow channel, so that each first flow channel can be evenly filled with condensed water. When the battery pack needs condensed water for cooling, the condensed water can evenly exchange heat with the battery pack to achieve a good temperature uniformity effect;

[0031] 5. The connection point between the water inlet manifold and the water inlet on the direct cooling plate of the present application is located between the two groups of first flow channels. The condensed water flowing out of the water inlet is dispersed to both sides and then enters the first flow channel. This method has an excellent dispersion effect on the condensed water. There will not be a situation where one first flow channel is completely filled with condensed water while another first flow channel has no condensed water flowing in. The method of entering in the middle and dispersing on both sides is more uniform for the distribution of condensed water and has a better cooling effect on the battery pack.

[0032] 6. The present application is also provided with a water outlet manifold, which collects the condensed water in all the first flow channels. The arrangement structure of the water outlet manifold is simple, which is convenient for connection and docking with the first flow channels. The discharge of condensed water from the direct cooling plate is simpler, and will not cause adverse effects on structures such as the battery pack;

[0033] 7. The water outlet manifold of the present application is provided with drainage outlets at both ends, and the condensed water collected by the water outlet manifold will be discharged from both ends. Such a design structure reduces the number of drainage outlets of the water outlet manifold, and can more conveniently control the discharge of condensed water, avoiding interference with other structural components;

[0034] 8. The drain port of the present application is higher than the bottom of the water outlet manifold. Such a design structure can prevent the condensed water from being discharged to the outside immediately after entering the water outlet manifold, but accumulates in the water outlet manifold to a certain extent before being discharged. The condensed water is filled more fully in the first flow channel, and the heat exchange efficiency with the battery pack is higher, and the cooling effect is better;

[0035] 9. The present application arranges the refrigerant inlet and the refrigerant outlet on the same side of the direct cooling plate, which, on the one hand, facilitates the arrangement of the refrigerant inlet and the refrigerant outlet, and makes the refrigerant entry and the refrigerant outflow more convenient. On the other hand, the refrigerant inlet and the refrigerant outlet are arranged on the same side, so that the refrigerant flow channel forms a U-shaped circulation flow structure on the direct cooling plate, which facilitates the refrigerant to more fully and comprehensively exchange heat with the battery pack, has a better cooling effect on the battery pack, and has a better effect on the uniform temperature control of the battery pack;

[0036] 10. The refrigerant flow channel of the present application is a U-shaped reciprocating baffle flow channel structure, which can form a refrigerant flow channel structure in which the refrigerant circulates on the direct cooling plate. In order to achieve an excellent temperature effect, the refrigerant flow channel is evenly distributed on the direct cooling plate, and can be in full and uniform contact with the battery pack to achieve a good temperature control effect;

[0037] 11. The staggered arrangement of the condensing water flow channel and the refrigerant flow channel of the present application can make the cooling structure on the direct cooling plate more uniform. When the refrigerant and condensing water are required to cool down the battery pack in a coordinated manner, the refrigerant and condensing water can cool down the battery pack more evenly, and there will be no large temperature difference in the battery cells, which is more superior for the temperature control of the battery pack.

[0038] 12. According to the layout structure of the battery pack, the present application designs two groups of refrigerant flows. The two groups of refrigerant flow channels are placed on both sides of the first center line of the direct cooling plate, which can fully and evenly contact the battery pack to ensure that the temperature control of the battery pack is efficient and balanced. The direct cooling plate can be provided with a fixed structure between the two groups of refrigerant flow channels to facilitate the installation of the direct cooling plate;

[0039] 13. The refrigerant flow channel of the present application includes a baffle flow channel. The baffle flow channel is designed to fill the direct cooling plate more evenly, so that the area through which the refrigerant can flow is larger, and the refrigerant flow channel can be more evenly in full contact with the battery pack, so that the temperature regulation of the battery pack is more efficient and balanced;

[0040] 14. The present application sets a middle fixing structure and a side fixing structure on the direct cooling plate. The middle fixing structure is located in the middle of the direct cooling plate, and the side fixing structure is arranged symmetrically with respect to the center line of the first direction. This can make the fixation of the direct cooling plate more stable, with good force performance, and the direct cooling plate will not have the problem of shaking, and the structural safety is greatly improved;

[0041] 15. The present application evenly distributes the refrigerant flow channel and the condensed water flow channel in the middle fixed structure and the side fixed structure, which can fully utilize the area other than the middle fixed structure and the side fixed structure on the direct cooling plate to ensure that it can be evenly contacted with the battery pack and efficiently and evenly regulate the temperature of the battery pack;

[0042] 16. The present application also provides a control method. The control method of the present application can select a suitable cooling control method for the battery pack based on the temperature of the battery pack and whether the air conditioner is in cooling mode. When the heat generated by the battery pack is not large, condensed water is selected to cool the battery pack to minimize energy consumption. When the heat generated by the battery pack is large, condensed water and refrigerant work together to cool the battery pack. The control method of the present application is simple, has a good cooling effect on the battery pack, and can save energy consumption to the greatest extent.

[0043] The battery direct cooling system of the present application has a simple structure, can make full use of the condensed water of the air-conditioning system to cool the battery pack, minimizes the energy consumption of cooling the battery pack, has extremely high heat exchange efficiency, is light in weight, and has great cost advantages. It can effectively reduce system power consumption and keep the battery temperature at the optimal level, thereby improving the vehicle's range. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 : Front view of the battery pack assembly of the present application;

[0045] Figure 2 : A top view of the battery pack assembly of the present application;

[0046] Figure 3 : Top view of the direct cooling plate of the present application;

[0047] Figure 4 : Bottom view of the main structure of the direct cooling plate of this application;

[0048] Figure 5 : Cross-sectional view of the direct cooling plate of the present application;

[0049] Figure 6 : Schematic diagram of the flow of refrigerant and condensed water in the direct cooling plate of the present application;

[0050] Figure 7 : Schematic diagram of the direct cooling plate interface structure of the present application;

[0051] Figure 8 : A partial enlarged schematic diagram of the water outlet manifold of the present application;

[0052] Among them: 1—direct cooling plate;

[0053] 101—first flow channel; 102—second flow channel; 103—return flow channel; 104—refrigerant inlet; 105—refrigerant outlet; 106—water inlet manifold; 107—water outlet manifold; 108—water inlet; 109—drain outlet; 110—first fixed point; 111—second fixed point; 112—first baffle flow channel; 113—second baffle flow channel;

[0054] 2—battery pack crossbeam; 3—battery pack lower guard plate; 4—battery pack upper guard plate. DETAILED DESCRIPTION

[0055] The embodiments of the present application are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0056] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0059] The present application relates to a battery direct cooling system. The battery direct cooling system of the present application cools the battery pack by setting a direct cooling plate structure and utilizing the refrigerant flow channel and condensed water flow channel on the direct cooling plate. The refrigerant flows in the refrigerant flow channel, which is a conventional temperature control method for the battery pack. The condensed water discharged by the air conditioning system flows in the condensed water flow channel. The condensed water generated by the air conditioning system of conventional vehicles is directly discharged and is not further utilized. The present application recycles this part of condensed water. When the air conditioning system is in cooling mode, the temperature of the condensed water generated is lower than the current external ambient temperature, or may be lower than the battery pack temperature. Therefore, this part of condensed water can be cooled and heat exchanged with the battery pack. Based on this consideration, the present application integrates a condensed water flow channel in the direct cooling plate, so that the condensed water generated by the air conditioning system in cooling mode flows in the condensed water. The condensed water can fully and evenly exchange heat with the battery pack in the direct cooling plate, so that the battery pack can achieve a cooling effect. Since the direct cooling plate of the present application integrates refrigerant flow channels and condensed water flow channels, the direct cooling plate can use condensed water for cooling when the heat generation of the battery pack is not large. When the heat generation is large, the refrigerant and condensed water can be used to work together to cool the battery pack, thereby achieving high efficiency and energy-saving effects.

[0060] Specifically, Figures 1 to 8 As shown, a battery direct cooling system of the present application includes a direct cooling plate 1. The direct cooling plate 1 of the present application is a plate-like structure that is directly and tightly attached to the lower end surface of the battery pack. The entire battery system structure also includes a battery pack crossbeam 2, a battery pack lower guard plate 3 and a battery plate upper guard plate 4. The battery pack upper guard plate 4 and the battery pack lower guard plate 3 are respectively arranged on the upper and lower sides of the battery pack. The battery pack crossbeam 2 fixes the entire battery system to the vehicle body. The direct cooling plate 1 is a structure for regulating the temperature of the battery pack.

[0061] like Figures 3 to 7As shown, the direct cooling plate 1 of the present application is provided with a refrigerant flow channel and a condensed water flow channel, and a refrigerant flows through the refrigerant flow channel, and the refrigerant flow channel is connected with the refrigerant inlet 104 and the refrigerant outlet 105 on the direct cooling plate 1. The refrigerant enters the refrigerant flow channel from the refrigeration inlet 104 and flows out from the refrigerant outlet 105, and the refrigerant flows in the thermal management system of the entire vehicle. When the refrigerant is needed to adjust the temperature of the battery pack, the refrigerant flows through the heat exchange structure or heating structure in the thermal management system, and the temperature of the refrigerant rises, and then flows through the battery pack, and the battery pack exchanges heat with the heated refrigerant, and the temperature of the refrigerant decreases, and circulates until the temperature of the battery pack reaches a suitable temperature range; when the battery pack needs the refrigerant to cool down, the refrigerant is cooled down in the heat exchange system of the thermal management system, and the cooled refrigerant flows through the battery pack to exchange heat with the battery pack, and the temperature of the battery pack decreases, and the refrigerant circulates to meet the cooling requirements of the battery pack. The adjustment mode of using refrigerant to control the temperature of the battery pack belongs to the conventional technical structure.

[0062] Condensed water discharged from the air conditioning system flows in the condensed water flow channel, and a water inlet structure and a water outlet structure are provided on the condensed water flow channel. Condensed water flows in the condensed water flow channel, which is different from the refrigerant flowing in the refrigerant flow channel. Condensed water is generated by the vehicle air conditioning system in cooling mode. The condensed water flow channel can only be used as a heat source for cooling the battery pack. When the battery pack does not generate much heat and the air conditioning is in cooling mode, the condensed water flow channel is started to allow the condensed water generated by the air conditioning system to flow in the condensed water flow channel, and the condensed water is used to absorb the heat of the battery pack, so that the battery pack can achieve a cooling effect. In the case where the battery pack generates a lot of heat, such as during charging conditions and high-speed driving conditions, the refrigerant flow channel and the condensed water flow channel can be turned on to cool the battery pack in coordination.

[0063] The design of the condensate flow channel is only to facilitate the use of the condensate generated by the air-conditioning system in the cooling mode, to save energy to the greatest extent and reduce energy consumption. The condensate flow channel and the refrigerant flow channel are both hollow flow channel structures arranged on the direct cooling plate 1. The condensate flow channel and the refrigerant flow channel are flow channels protruding from both sides of the direct cooling plate 1, or they can be flow channels protruding from one side of the direct cooling plate 1. In actual production, the direct cooling plate 1 can be split into two plate-like structures, and grooves corresponding to the condensate flow channel and the refrigerant flow channel are set on each plate-like structure. Then, the two plate-like structures are assembled together so that the grooves on the two plate-like structures correspond to each other, that is, a hollow flow channel with a circular cross-section can be formed to facilitate the flow of refrigerant and condensate.

[0064] The refrigerant flow channel of the present application can be used for both temperature control of the battery pack and temperature control of the battery pack. The condensed water flow of the present application is only used for the temperature control of the battery pack. Therefore, the present application only discusses the temperature control of the battery pack, and the temperature control method is not within the scope of the present application.

[0065] Specifically, when the battery direct cooling system of the present application is actually applied, the following method can be used for operation: S1, obtaining the air conditioning mode and the battery pack temperature;

[0066] The working mode of the air conditioning system can be directly obtained through the vehicle control system. The battery pack temperature can be obtained in real time through the vehicle's thermal management system. The battery pack has temperature sensors for monitoring the temperature of the battery cells. These temperature sensors can be used to monitor the working temperature of the battery pack.

[0067] S2, controlling the refrigerant flow channel and the condensed water flow channel based on the air conditioning mode and the battery pack temperature;

[0068] When the passenger compartment is in the air conditioning cooling mode and the battery pack temperature is lower than the set value, the condensate flow channel is opened to cool the battery pack with the condensate generated by the air conditioning cooling, and the refrigerant flow channel is closed; at this time, the battery pack generates less heat, and the condensate generated in the cooling mode of the air conditioning system is introduced into the condensate flow channel, so that the condensate flows through the condensate flow channel to exchange heat with the battery pack, and the heat of the battery pack is taken away by the condensate, thereby achieving the effect of cooling the battery pack;

[0069] When the passenger compartment is in the air-conditioning cooling mode and the battery pack temperature is not less than the set value, the condensate flow channel and the refrigerant flow channel are opened, so that the condensate generated by the air conditioner and the refrigerant work together to cool the battery pack; at this time, the heat generated by the battery pack is relatively large, and simply cooling with condensate water cannot meet the requirements of quickly controlling the battery pack temperature. The refrigerant flow channel needs to be opened for coordinated temperature control, and the refrigerant flow channel and the condensate flow channel work together to cool the battery pack.

[0070] When the battery pack temperature drops to a suitable temperature range, the control of the refrigerant flow channel and the condensed water flow channel can be stopped to maintain the battery pack within the appropriate temperature range, so that the battery pack temperature remains at the optimal state and the vehicle's range is improved.

[0071] In some embodiments of the present application, the present embodiment optimizes the above-mentioned condensate flow channel, such as Figures 3 to 7 As shown, the condensate flow channel of this embodiment includes a plurality of first flow channels 101, which are straight flow channels extending along the first direction of the direct cooling plate 1, one end of the first flow channel 101 is connected to the water inlet structure, and the other end is connected to the water outlet structure, and the plurality of first flow channels 101 are evenly spaced and arranged on the direct cooling plate 1 along the second direction of the direct cooling plate 1. Figure 3 As shown, the first direction of this embodiment is Figure 3 The up and down directions in the Figure 3 In the left and right directions, the first direction and the second direction are perpendicular to each other.

[0072] The first flow channel 101 is arranged to extend along the first direction of the direct cooling plate 1, extending from one end close to the first direction of the direct cooling plate 1 to the other end close to the first direction of the direct cooling plate 1, that is, fully covering the direct cooling plate 1 along the first direction; the condensation water flow channel includes a plurality of first flow channels 101, and the plurality of first flow channels 101 are arranged evenly spaced along the second direction, so that the first flow channels 101 can cover the direct cooling plate 1 as much as possible in the second direction, forming an area on the direct cooling plate 1 for condensation water to flow and cool. The first flow channels 101 are arranged evenly spaced along the second direction, and the first flow channels 101 are evenly distributed on the direct cooling plate 1, so the contact with the battery pack is also uniform, and the cooling process of the battery pack by the condensation water is also uniform, and there will be no situation where the temperature of some battery cells is high and the temperature of some battery cells is low. When the condensation water is cooled, it can be ensured that the condensation water is balanced for each group of battery cells.

[0073] In a further embodiment of the present application, the present embodiment further optimizes the above-mentioned condensate flow channel. Specifically, Figures 3 to 6 As shown, the condensing water flow channels of this embodiment include two groups of first flow channels 101, which are disposed on both sides of the first direction center line of the direct cooling plate 1, and each group includes a plurality of first flow channels 101 equidistantly arranged along the second direction.

[0074] The present embodiment designs the condensation water flow channel as two groups of first flow channels 101 for two purposes. On the one hand, it is to reserve the position in the middle of the direct cooling plate 1 as the fixed point arrangement position of the direct cooling plate 1. On the other hand, by dividing the condensation water flow channel into two groups, it is convenient for the condensation water to evenly enter all the first flow channels 101. In practical application, considering that the condensation water generated by the air-conditioning system during refrigeration does not have any pressurizing equipment, it flows in the first flow channel 101 by gravity. If the structural design of the first flow channel 101 is unreasonable, there may be some first flow channels 101 with condensation water flowing through, while some first flow channels 101 do not have condensation water flowing through. This will cause the first flow channel 101 through which condensation water flows to exchange heat with the corresponding battery cell, while the first flow channel 101 without condensation water flowing cannot exchange heat with the battery cell, and the temperature difference of the battery cell in the battery pack increases, resulting in imbalance.

[0075] This embodiment optimizes the water structure to solve the above problems. Figure 4 As shown, the water inlet structure includes a water inlet manifold 106 welded to the bottom surface of the direct cooling plate 1. The water inlet manifold 106 is a straight pipe arranged along the second direction. One side of the water inlet manifold 106 is connected to the water inlet 108 on the direct cooling plate 1, and the other side is connected to the water inlet end of all the first flow channels 101. The connection point between the water inlet manifold 106 and the water inlet 108 is between the two groups of first flow channels 101.

[0076] The water inlet manifold 106 is a pipe structure connecting the water inlet 108 and the inlets of all the first flow channels 101. The water inlet manifold 106 collects the condensed water flowing out of the water inlet 108 and then evenly distributes it to all the first flow channels 101, thereby balancing the condensed water flowing in all the first flow channels 101 to the greatest extent, so that the condensed water in all the first flow channels 101 is uniform.

[0077] The water inlet manifold 106 is a pipe structure welded to the bottom surface of the direct cooling plate 1 by a brazing process. This embodiment provides a size structure of the water inlet manifold 106. The total height of the water inlet manifold 106 is 8 mm, the width is 18 mm, and the length is set according to the number of the first flow channels 101. Of course, it is not limited to the above-mentioned size data, as long as it meets the actual needs.

[0078] like Figure 7 As shown, the top surface of the direct cooling plate 1 is provided with an interface structure, which is arranged at a position close to one end of the inlet of the first flow channel 101. A water inlet 108 is provided on the interface structure, and the water inlet 108 is connected to the condensed water discharge port of the air-conditioning system. The water inlet manifold 106 is located between the water inlet 108 and one end of the inlet of the first flow channel 101. The direct cooling plate 1 is located at the bottom of the entire vehicle body structure. The condensed water generated by the air-conditioning system enters the direct cooling plate 1 from the water inlet 108 under the action of gravity, and then flows into the water inlet manifold 106 at the bottom of the direct cooling plate 1. The condensed water enters the water inlet manifold 106 from the middle of the water inlet manifold 106, and then flows to both sides along the second direction, and then is distributed to each first flow channel 101 one by one, and flows evenly in the first flow channel 101, achieving a good cooling effect.

[0079] In a preferred embodiment of the present application, the above-mentioned water outlet structure is optimized. Figure 4 As shown, the water outlet structure of this embodiment includes a water outlet manifold 107 welded to the bottom surface of the direct cooling plate 1, and the water outlet manifold 107 is a straight pipe arranged along the second direction. The pipeline structure of the water outlet manifold 107 is similar to that of the water inlet manifold 106, and both are pipeline structures welded to the bottom surface of the direct cooling plate 1 by a brazing process. The specifications and dimensions of the two are the same. The water inlet manifold 106 and the water outlet manifold 107 are arranged parallel to each other and are placed on both sides of the first flow channel 101.

[0080] One side of the water outlet manifold 107 is connected to the water outlet end of all the first flow channels 101, and a drain port 109 for discharging condensed water is provided on the water outlet manifold 107. In actual application, the condensed water generated by the air conditioning system enters the direct cooling plate 1 from the water inlet 108 under the action of gravity, and then flows into the water inlet manifold 106 at the bottom of the direct cooling plate 1. The condensed water enters the water inlet manifold 106 from the middle of the water inlet manifold 106, and then flows to both sides along the second direction, and then is distributed to each first flow channel 101 one by one, and flows evenly in the first flow channel 101. The condensed water of the first flow channel 101 enters the water outlet manifold 107 after passing through the first flow channel 101, and the condensed water is collected in the water outlet manifold 107, and finally discharged from the drain port 109 to the outside of the direct cooling plate 1. The water outlet manifold 107 has a function of collecting, summarizing and discharging.

[0081] In order to allow the condensed water in the first flow channel 101 to fully exchange heat with the battery pack, the present embodiment designs the drain ports 109 at the second ends of the water outlet manifold 107. That is, such a design structure allows the condensed water to finally gather in the water outlet manifold 107 after flowing out of the first flow channel 101. The condensed water gathered in the water outlet manifold 107 will not flow out from the drain port 109 immediately, but will flow to both sides along the water outlet manifold 107 until it flows out from the drain ports 109 on both sides. This is equivalent to increasing the residence time of the condensed water in the water outlet manifold 107, so that the condensed water stays longer in the first flow channel 101, and the heat exchange with the battery pack is more complete, thereby making the most of the condensed water to cool the battery pack.

[0082] Furthermore, the drain port 109 of the present embodiment is a hole-shaped structure opened at both ends of the water outlet manifold 107 and higher than the bottom of the water outlet manifold 107. That is, after the condensed water flows out from the first flow channel 101 and finally gathers in the water outlet manifold 107, it will gradually gather in the water manifold 107, and will not flow out from the drain port 109 until the surface of the gathered condensed water exceeds the height of the drain port 109, further increasing the time for the condensed water to gather in the water manifold 107, and the condensed water flows more fully in the first flow channel 101, and the heat exchange effect with the battery pack is better.

[0083] In actual control, when the passenger compartment is in the air conditioning cooling mode and the battery pack temperature needs to be cooled, the condensed water generated by the air conditioning system in the cooling mode first enters the direct cooling plate 1 from the water inlet 108, and then flows into the water inlet manifold 106 under the action of gravity. The condensed water flowing out of the water inlet 108 enters the water inlet manifold 106 from the middle of the water inlet manifold 106, and then flows to both sides along the second direction. The condensed water is evenly distributed to all the first flow channels 101 through the distribution of the water inlet manifold 106. , flows along the first direction in the first flow channel 101, exchanges heat with the battery pack, and reduces the temperature of the battery pack; finally flows out from the first flow channel 101 and enters the water outlet manifold 107. The condensed water entering the water outlet manifold 107 is first collected in the water outlet manifold 107, and the water level in the water outlet manifold 107 gradually rises until it exceeds the height of the drain port 109, and then is discharged from the drain ports 109 at both ends of the water outlet manifold 107 to the outside of the direct cooling plate 1, completing the cooling process of the battery pack by the condensed water.

[0084] The above is the complete flow process of the condensed water in the direct cooling plate 1 of this embodiment. The condensed water flows evenly in the direct cooling plate 1 through the first flow channel 101, exchanges heat with the battery pack, and reduces the temperature of the battery pack. This operation method can make full use of the condensed water with lower temperature to cool the battery pack, save energy to the greatest extent, and reduce the energy consumption of battery pack temperature regulation.

[0085] In other embodiments of the present application, the present embodiment optimizes the above-mentioned refrigerant flow channel structure. As described above, the present embodiment is provided with an interface structure on the direct cooling plate 1, and the interface structure is located on one side of the inlet end of the first flow channel 101. The interface structure is also provided with a refrigerant inlet 104 and a refrigerant outlet 105, that is, the refrigerant inlet 104 and the refrigerant outlet 105 of the present embodiment are on the same side of the direct cooling plate 1. The refrigerant enters the refrigerant flow channel from the refrigerant inlet 104 and flows out from the refrigerant outlet 105. In other words, the circulation flow of the refrigerant in the refrigerant flow channel is not a straight line flow in one direction only, but there is a U-shaped return flow. Compared with the straight-line flow structure of condensed water, the refrigerant flow channel of the present embodiment adopts a U-shaped flow channel structure. The U-shaped flow channel structure increases the flow distance of the refrigerant under the same area, and the residence time of the refrigerant in the direct cooling plate 1 is greatly increased. The heat exchange efficiency between the refrigerant and the battery pack is higher, and the temperature control effect of the battery pack is better.

[0086] In a further embodiment of the present application, the above-mentioned refrigerant flow channel is further optimized. Specifically, Figures 3 to 7As shown, the refrigerant flow channel of this embodiment includes a second flow channel 102 whose one end is connected to the refrigerant inlet 104 and the internal refrigerant flows from the refrigerant inlet 104 along the first direction, and a return flow channel 103 whose one end is connected to the other end of the second flow channel 102 and the other end is connected to the refrigerant outlet 105. A plurality of second flow channels 102 arranged at intervals along the second direction and a plurality of return flow channels 103 arranged at intervals along the second direction are provided on the direct cooling plate 1.

[0087] That is, the refrigerant flow channel of this embodiment includes a second flow channel 102 and a return flow channel 103. The second flow channel 102 is a straight flow channel structure similar to the first flow channel 101, and the refrigerant flows in the first direction in the second flow channel 102. In this embodiment, multiple second flow channels 102 are not evenly arranged on the direct cooling plate 1. The refrigerant is evenly distributed to each second flow channel 102 directly through the refrigerant inlet 104. Because the thermal management system connected to the second flow channel 102 has a power device that provides a driving effect on the flow of the refrigerant, such as a compressor and other structures, the flow of the refrigerant in the refrigerant flow channel has a certain pressure and can be automatically evenly distributed to the second flow channel 102. The second flow channel 102 is the main flow channel for heat exchange between the refrigerant and the battery pack. Therefore, in this embodiment, multiple second flow channels 102 are evenly arranged on the direct cooling plate 1.

[0088] The return channel 103 is a structure connecting the second channel 102 and the refrigerant outlet. The return channel 103 is designed on both sides of the second direction of the direct cooling plate 1. There are multiple return channels 103, but the number is less than the number of the second channels 102. The refrigerant in the second channel 102 is collected in the multiple return channels 103 and finally flows out from the refrigerant outlet 105. The refrigerant circulates in the refrigerant channel.

[0089] In order to make the heat exchange effect between the battery pack and the cooling channel more uniform, in this embodiment, multiple second channels 102 are evenly arranged on the direct cooling plate 1, and the multiple second channels 102 are arranged at intervals along the second direction. The specific arrangement structure is as follows: Figures 3 to 5 As shown, two groups of refrigerant flow channels are provided on the direct cooling plate 1, and the two groups of refrigerant flow channels are disposed on both sides of the first center line of the direct cooling plate 1. Each group of refrigerant flow channels includes a plurality of second flow channels 102 and a plurality of return flow channels 103, and the return flow channels 103 are located on the side of the second flow channels 102 of the same group away from the first center line of the direct cooling plate 1, and a plurality of second flow channels 102 are evenly arranged in the area between the first center line of the direct cooling plate 1 and the return flow channels 103, and a plurality of second flow channels 102 are evenly spaced along the second direction. In this way, it is possible to ensure that the second flow channels 102 are in uniform contact with the battery pack to the greatest extent, and obtain a balanced thermal management effect.

[0090] The second flow channel 102 is a straight pipe structure, and the return flow channel 103 includes a straight portion and some curved curved portions connecting the second flow channel 102. For some areas on the direct cooling plate 1 where the second flow channel 102 cannot be directly arranged, this embodiment also provides a baffle flow channel. Figures 3 to 6 As shown, the refrigerant flow channel of this embodiment includes a first baffle flow channel 112 located on both sides of the first direction of the direct cooling plate 1 and a second baffle flow channel 113 located on both sides of the first direction of the side fixed structure of the direct cooling plate 1. The first baffle flow channel 112 and the second baffle flow channel 113 are curved flow channel structures that include both the flow channel along the first direction and the flow channel along the second direction.

[0091] The first baffle channel 112 is used to form a refrigerant flow area in the first direction on both sides of the second channel 102, and the second baffle channel 113 is used to form a refrigerant flow area on both sides of the fixed structure on the side of the direct cooling plate 1. The areas on the first direction on both sides of the second channel 102 and on both sides of the fixed structure on the side of the direct cooling plate 1 are small and irregular areas. These areas are filled by the first baffle channel 112 and the second baffle channel 113, so that the refrigerant can flow through the positions where the flow area cannot be formed by the straight channel, and the battery packs at these positions can also exchange heat with the refrigerant, ensuring that the battery pack can be evenly temperature-regulated without a large temperature difference in the battery cells.

[0092] During actual control, the refrigerant enters the refrigerant flow channel in the direct cooling plate 1 from the refrigerant inlet 104 on the interface structure of the direct cooling plate 1, and is first evenly distributed to each second flow channel 102, and the refrigerant flows evenly in the second flow channel 102 along the first direction, part of the refrigerant enters the second baffle flow channel 113 through the second flow channel 102, and flows in the second baffle flow channel 113, and another part of the refrigerant enters the first baffle flow channel 112 through the second flow channel 102, and finally all the refrigerant is collected in the return flow channel 103, and the refrigerant collected in the return flow channel 103 flows out of the direct cooling plate 1 from the refrigerant outlet 105, completing a refrigerant circulation in the direct cooling plate 1, and the refrigerant will exchange heat with the battery pack during the flow in the second flow channel 102, the first baffle flow channel 112, the second baffle flow channel 113 and the return flow channel 103, so as to achieve the purpose of thermal management of the battery pack; it circulates in sequence until the temperature of the battery pack reaches the set requirement.

[0093] In actual application, the structure of the refrigerant flow channel is not limited to the above-mentioned structural form. As long as the refrigerant flow channel can be evenly filled on the direct cooling plate 1, the refrigerant flow area on the direct cooling plate 1 can fully and evenly cover the battery pack, so that the battery pack can perform uniform heat exchange, the demand can be met.

[0094] In some embodiments of the present application, the above-mentioned refrigerant flow channel and condensed water flow channel arrangement structure are optimized. Figures 3 to 6 As shown, the refrigerant flow channel and the condensing water flow channel of this embodiment are arranged alternately on the direct cooling plate 1. The first flow channel 101 of the condensing water flow channel is between two adjacent second flow channels 102, that is, the coverage area of ​​the refrigerant flow channel includes the coverage area of ​​the condensing water flow channel. Both the refrigerant flow channel and the condensing water flow channel are arranged in the main area where the battery pack contacts the direct cooling plate 1. The first flow channel 101 of the condensing water flow channel is between two adjacent second flow channels 102. On the one hand, it can save the space occupied by the refrigerant flow channel and the condensing water flow channel, making the flow channel arrangement more sophisticated. On the other hand, it can coordinate the refrigerant flow channel and the condensing water flow channel to cool the battery pack. The area where the refrigerant flow channel and the condensing water flow channel overlap is the best for cooling the battery pack.

[0095] When the passenger compartment is in the air-conditioning cooling mode and the battery pack temperature is not less than the set value, the heat generated by the battery pack is relatively large, and condensation water cooling and refrigerant cooling need to be enabled simultaneously. The refrigerant enters the second flow channel 102 to exchange heat with the battery pack, and the condensed water enters the first flow channel 101 to exchange heat with the battery pack. The flow direction of the condensed water in the first flow channel 101 is consistent with the flow direction of the refrigerant in the second flow channel 102, both flowing along the first direction from the side of the water inlet manifold 107 to the side of the water outlet manifold 107. The refrigerant and condensed water work together to cool the battery pack, so that the battery pack is quickly within a suitable temperature range.

[0096] The dimensions of the refrigerant flow channel and the condensed water flow channel of this embodiment are the same, both of which are flow channel structures with a height of 2.8 mm and a width of 5 mm, and their length is related to the structure of the direct cooling plate 1. Of course, in actual application, it is not limited to the above dimensions, as long as it can achieve the effect of balanced cooling of the battery pack.

[0097] In other embodiments of the present application, the structure of the direct cooling plate 1 is optimized. Specifically, Figures 3 to 6 As shown, a fixed structure is provided on the direct cooling plate 1 of the present embodiment, and the fixed structure includes an intermediate fixed structure located on the first direction center line of the direct cooling plate 1 and a side fixed structure symmetrically arranged around the first direction center line of the direct cooling plate 1, the intermediate fixed structure includes a plurality of first fixed points 110 equidistantly arranged along the first direction, and the side fixed structure includes a group of second fixed points 111.

[0098] The fixing structure is a structure used to fix the direct cooling plate 1 to the bottom of the battery pack, usually a bolt or a welding structure. The direct cooling plate 1 of this embodiment is made of aluminum alloy material, and the above-mentioned refrigerant flow channel and condensed water flow channel are formed by a stamping process. The direct cooling plate 1 is made of aluminum alloy material with good heat conduction effect, which is convenient for heat exchange with the battery pack. At the same time, the direct cooling plate 1 made of aluminum alloy has low processing difficulty and low cost. In order to conveniently fix the direct cooling plate 1 made of aluminum alloy to the bottom of the battery pack, this embodiment fixes the direct cooling plate 1 through the first fixed point 110 in the middle and the second fixed points 111 on both sides. The multiple first fixed points 110 of the middle fixed structure are arranged equidistantly along the first direction, and the second fixed points on both sides are arranged symmetrically about the center line of the first direction. Therefore, the fixing structure on the direct cooling plate 1 forms a cross-shaped connection structure. The fixed connection of the direct cooling plate 1 is stable and not prone to shaking and other problems. The direct cooling plate 1 is in full and close contact with the battery pack.

[0099] The present application also relates to a control method, which is used to control the above-mentioned battery direct cooling system. Specifically: the real-time temperature of the battery pack is collected by the temperature sensor on the battery pack, and the current working mode of the air-conditioning system is obtained by the thermal management system; when the passenger compartment is in the air-conditioning cooling mode and the battery pack temperature is less than the set value, the heat generated by the battery pack is small, and there is no need to cool the battery pack by the refrigerant. At this time, the air-conditioning system is in the passenger compartment cooling mode, and the air-conditioning system will generate condensed water, which can be used to cool the battery pack. The condensed water generated by the air-conditioning system enters the direct cooling plate 1 through the water inlet 108, and flows into the water inlet manifold 106 under the action of gravity, and flows from the water inlet 10 The outflowing condensed water enters the water inlet manifold 106 from the middle of the water inlet manifold 106, and then flows to both sides along the second direction. The condensed water is evenly distributed to all the first flow channels 101 through the distribution of the water inlet manifold 106, flows along the first direction in the first flow channel 101, exchanges heat with the battery pack, and reduces the temperature of the battery pack; finally, it flows out from the first flow channel 101 and enters the water outlet manifold 107. The condensed water entering the water outlet manifold 107 is first collected in the water outlet manifold 107, and the water level in the water outlet manifold 107 gradually rises until it exceeds the height of the drain port 109, and then is discharged from the drain ports 109 at both ends of the water outlet manifold 107 to the outside of the direct cooling plate 1, completing the cooling process of the battery pack by the condensed water;

[0100] When the passenger compartment is in the air conditioning cooling mode and the battery pack temperature is not less than the set value, the heat generated by the battery pack is relatively large, and the cooling of the battery pack by condensed water cannot meet the demand for rapid adjustment. Therefore, it is necessary to open the refrigerant flow channel to cool the battery pack. Both the condensed water flow channel and the refrigerant flow channel are opened. For the condensed water flow channel, the condensed water generated by the air conditioning system enters the direct cooling plate 1 through the water inlet 108, and flows into the water inlet manifold 106 under the action of gravity. The condensed water flowing out of the water inlet 108 enters the inlet from the middle of the water inlet manifold 106. The condensed water flows into the water collecting pipe 106, and then flows to both sides along the second direction. The condensed water is evenly distributed to all the first flow channels 101 through the distribution of the water inlet collecting pipe 106, flows along the first direction in the first flow channel 101, exchanges heat with the battery pack, and reduces the temperature of the battery pack; finally, it flows out from the first flow channel 101 and enters the water outlet collecting pipe 107. The condensed water entering the water outlet collecting pipe 107 is first collected in the water outlet collecting pipe 107, and the water level in the water outlet collecting pipe 107 gradually rises until it exceeds the height of the drain port 109, and then flows out from both sides of the water outlet collecting pipe 107. The drain port 109 at the end is discharged to the outside of the direct cooling plate 1, completing the cooling process of the battery pack by the condensed water; for the refrigerant flow channel, the refrigerant enters the refrigerant flow channel in the direct cooling plate 1 from the refrigerant inlet 104 on the interface structure of the direct cooling plate 1, and is first evenly distributed to each second flow channel 102. The refrigerant flows evenly in the second flow channel 102 along the first direction. Part of the refrigerant enters the second baffle flow channel 113 through the second flow channel 102 and flows in the second baffle flow channel 113. The other part of the refrigerant enters the first baffle flow channel through the second flow channel 102. Channel 112, and finally all the refrigerant is collected in the return flow channel 103, and the refrigerant collected in the return flow channel 103 flows out of the direct cooling plate 1 from the refrigerant outlet 105, completing a refrigerant circulation in the direct cooling plate 1. During the flow of the refrigerant in the second flow channel 102, the first baffle flow channel 112, the second baffle flow channel 113 and the return flow channel 103, heat exchange occurs with the battery pack to cool the battery pack, and the refrigerant circulates in sequence. During this process, the condensed water and refrigerant system cool the battery pack; until the temperature of the battery pack reaches the set requirement.

[0101] The set temperature of the present application is 35°C, but is not limited to this temperature and can be set according to the actual temperature requirements of the battery pack.

[0102] In addition, the present application also provides a computer-readable storage medium on which a program product capable of implementing the control method of the battery direct cooling system described above in this specification is stored. In some possible implementations, various aspects of the present application can also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps described in the above "Exemplary Method" section of this specification according to various exemplary embodiments of the present application. A portable compact disk read-only memory (CD-ROM) can be used and includes program code, and can be run on a terminal device, such as a personal computer. However, the program product of the present application is not limited to this. In this document, a readable storage medium can be any tangible medium containing or storing a program, which can be used by or in combination with an instruction execution system, apparatus or device.

[0103] The program product may use any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0104] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0105] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0106] Program code for performing the operations of the present application may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0107] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the example implementation methods described here can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the implementation methods of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation methods of the present application.

[0108] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A battery direct cooling system, characterized in that: It comprises a direct cooling plate (1); the direct cooling plate (1) is provided with: A refrigerant flow channel, wherein refrigerant flows through the refrigerant flow channel, and the refrigerant flow channel is connected to a refrigerant inlet (104) and a refrigerant outlet (105) on the direct cooling plate (1); The condensed water flow channel has condensed water discharged from the air conditioning system flowing therein, and the condensed water flow channel is provided with a water inlet structure and a water outlet structure.

2. A battery direct cooling system as claimed in claim 1, characterized in that: The condensing water flow channel comprises a plurality of first flow channels (101); the first flow channels (101) are straight flow channels extending along a first direction of the direct cooling plate (1); one end of the first flow channel (101) is connected to a water inlet structure, and the other end is connected to a water outlet structure; the plurality of first flow channels (101) are evenly spaced and arranged on the direct cooling plate (1) along a second direction of the direct cooling plate (1); the first direction and the second direction are perpendicular to each other.

3. A battery direct cooling system as claimed in claim 2, characterized in that: The condensing water flow channel comprises two groups of first flow channels (101), the two groups of first flow channels (101) are arranged on both sides of the first direction center line of the direct cooling plate (1), and each group comprises a plurality of first flow channels (101) arranged at equal intervals along the second direction.

4. A battery direct cooling system as claimed in claim 3, characterized in that: The water inlet structure comprises a water inlet manifold (106) welded to the bottom surface of the direct cooling plate (1); the water inlet manifold (106) is a straight pipe arranged along the second direction, one side of the water inlet manifold (106) is connected to the water inlet (108) on the direct cooling plate (1), and the other side is connected to the water inlet ends of all the first flow channels (101).

5. A battery direct cooling system as claimed in claim 4, characterized in that: The point where the water inlet manifold (106) communicates with the water inlet (108) is located between the two groups of first flow channels (101).

6. A battery direct cooling system as claimed in claim 3, characterized in that: The water outlet structure comprises a water outlet manifold (107) welded to the bottom surface of the direct cooling plate (1); the water outlet manifold (107) is a straight pipe arranged along the second direction, one side of the water outlet manifold (107) is connected to the water outlet ends of all the first flow channels (101), and a drain port (109) for discharging condensed water is provided on the water outlet manifold (107).

7. A battery direct cooling system as claimed in claim 6, characterized in that: Drainage outlets (109) are provided at both ends of the water outlet manifold (107).

8. A battery direct cooling system as claimed in claim 7, characterized in that: The water outlet (109) is a hole-shaped structure opened at both ends of the water outlet manifold (107) and higher than the bottom of the water outlet manifold (107).

9. A battery direct cooling system as claimed in claim 1, characterized in that: The refrigerant inlet (104) and the refrigerant outlet (105) are located on the same side of the direct cooling plate (1).

10. A battery direct cooling system as claimed in claim 9, characterized in that: The refrigerant flow channel comprises a second flow channel (102) whose one end is connected to the refrigerant inlet (104) and the internal refrigerant flows from the refrigerant inlet (104) along a first direction, and a return flow channel (103) whose one end is connected to the other end of the second flow channel (102) and the other end is connected to the refrigerant outlet (105); the direct cooling plate (1) is provided with a plurality of second flow channels (102) arranged at intervals along the second direction and a plurality of return flow channels (103) arranged at intervals along the second direction.

11. A battery direct cooling system as claimed in claim 10, characterized in that: The first flow channel (101) of the condensed water flow channel is located between two adjacent second flow channels (102).

12. A battery direct cooling system as claimed in claim 10, characterized in that: The direct cooling plate (1) is provided with two groups of refrigerant flow channels, and the two groups of refrigerant flow channels are respectively arranged on both sides of the first center line of the direct cooling plate (1).

13. A battery direct cooling system as claimed in claim 10, characterized in that: The refrigerant flow channel comprises a first baffle flow channel located on both sides of the first direction of the direct cooling plate (1) and a second baffle flow channel located on both sides of the first direction of the fixed structure on the side of the direct cooling plate (1); the first baffle flow channel and the second baffle flow channel are curved flow channel structures including both the flow channel along the first direction and the flow channel along the second direction.

14. A battery direct cooling system as claimed in claim 1, characterized in that: The direct cooling plate (1) is provided with a fixing structure; the fixing structure comprises an intermediate fixing structure located on the first direction center line of the direct cooling plate (1) and a side fixing structure symmetrically arranged with the first direction center line of the direct cooling plate (1) as the center; the intermediate fixing structure comprises a plurality of first fixing points (110) arranged at equal intervals along the first direction; and the side fixing structure comprises a group of second fixing points (111).

15. A battery direct cooling system as claimed in claim 14, characterized in that: The refrigerant flow channel and the condensed water flow channel are evenly distributed between the middle fixing structure and the side fixing structure.

16. A control method, characterized in that: The control method is used to cool down the battery using a battery direct cooling system as claimed in any one of claims 1 to 15, comprising: Get the air conditioning mode and battery pack temperature; When the passenger compartment is in air conditioning cooling mode and the battery pack temperature is lower than a set value, the condensate flow channel is opened to cool the battery pack with condensate generated by air conditioning cooling, and the refrigerant flow channel is closed; When the passenger compartment is in the air-conditioning cooling mode and the battery pack temperature is not less than the set value, the condensate flow channel and the refrigerant flow channel are opened so that the condensate generated by the air-conditioning and the refrigerant work together to cool the battery pack.

17. A control method according to claim 16, characterized in that: The set point is 35°C.

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