Air-cooling and liquid-cooling collaborative heat dissipation system and method for lithium ion power battery

Abstract

The invention discloses a lithium ion power battery air cooling and liquid cooling collaborative heat dissipation system and method, the system comprises a cooling assembly, the cooling assembly has a first working mode, and the cooling assembly comprises an air cooling mechanism and a liquid cooling mechanism; wherein when the cooling assembly executes the first working mode, the air cooling mechanism and the liquid cooling mechanism operate at the same time, so as to cool each surface of each battery monomer of the battery pack; the liquid cooling mechanism comprises at least one liquid cooling mounting plate, and the battery monomers are jointly mounted on one liquid cooling mounting plate to form a battery pack; wherein the air cooling mechanism and the liquid cooling mounting plate are respectively positioned on different surfaces of each battery monomer. Therefore, all surfaces of each single battery can be efficiently cooled, and the cooling effect of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery heat dissipation, in particular to a lithium ion power battery air-cooled liquid-cooled collaborative heat dissipation system and method. BACKGROUND

[0002] With the requirement of energy saving and emission reduction, new energy vehicles are applied more and more, and the production and sales volume increases year by year. As the power source of new energy vehicles, lithium ion power batteries directly affect the driving range, power performance and other performances of vehicles. However, when the lithium battery is charged and discharged, heat is generated, which causes the temperature of the battery to rise. When the lithium ion power battery works, the temperature exceeds 40°, which causes the charging and discharging performance to be poor, and in serious cases, causes thermal runaway, resulting in serious safety accidents such as battery smoke, fire and even explosion.

[0003] The current lithium ion power battery heat dissipation mode is usually a single mode, such as air-cooled heat dissipation, liquid-cooled heat dissipation, phase change cooling heat dissipation, etc. At the same time, the existing heat dissipation system is complex and the overall volume of the heat dissipation structure is large, which is easy to cause space conflict and weight increase, not only inconvenient to assemble with the battery, but also not conducive to arrangement in the whole vehicle. Secondly, if the overall volume of the heat dissipation structure is reduced, the heat dissipation effect will be insufficient. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application provides a lithium ion power battery air-cooled liquid-cooled collaborative heat dissipation system and method to solve the problems in the prior art.

[0005] To achieve the above purpose, the present application provides the following technical scheme:

[0006] A lithium ion power battery air-cooled liquid-cooled collaborative heat dissipation system, comprising:

[0007] The cooling assembly has a first working mode, and the cooling assembly comprises an air-cooled mechanism and a liquid-cooled mechanism; wherein when the cooling assembly executes the first working mode, the air-cooled mechanism and the liquid-cooled mechanism operate at the same time to cool each surface of each battery monomer of the battery pack;

[0008] The liquid-cooled mechanism comprises at least one liquid-cooled mounting plate, and each battery monomer is commonly mounted on one liquid-cooled mounting plate to form the battery pack; wherein the air-cooled mechanism and the liquid-cooled mounting plate are located on different surfaces of each battery monomer, respectively.

[0009] In one embodiment, the liquid-cooled mounting plate is provided with at least one liquid inlet and at least one liquid outlet, and a plurality of liquid cooling flow channels are arranged in the liquid-cooled mounting plate, and the liquid inlet is communicated with the liquid outlet through the plurality of liquid cooling flow channels; wherein the liquid inlet and the liquid outlet are arranged on two opposite surfaces of the liquid-cooled mounting plate, respectively.

[0010] In one of the embodiments, when the liquid cooling flow channels are multiple, the multiple liquid cooling flow channels include at least one outer flow channel and multiple inner flow channels, and two ends of the multiple inner flow channels are respectively communicated with the liquid inlet and the liquid outlet through the outer flow channel.

[0011] In one of the embodiments, the outer flow channel is connected at its head and tail to form a rectangular flow channel.

[0012] The multiple inner flow channels are arranged in the square of the rectangular flow channel formed by the outer flow channel, and the multiple inner flow channels collectively form a lantern-shaped liquid cooling area; wherein in two adjacent inner flow channels, the curvature of the inner flow channel far from the center position is greater than the curvature of the inner flow channel close to the center position.

[0013] In one of the embodiments, the battery monomers are arranged at intervals on the liquid cooling mounting plate, and an air cooling channel is formed between two adjacent battery monomers.

[0014] The air cooling mechanism includes the air cooling channel and at least two heat dissipation fans arranged at least one end of the air cooling channel.

[0015] In one of the embodiments, the liquid cooling mounting plate is provided in multiple, and the multiple liquid cooling mounting plates include a bottom liquid cooling plate connected with each battery monomer and a side liquid cooling plate on both sides of the battery pack, and the bottom liquid cooling plate is attached to one side of each battery monomer, and the side liquid cooling plate is attached to one side of the adjacent battery monomer.

[0016] The two heat dissipation fans are located at the front side of the battery pack, and a first air cooling area is formed between the heat dissipation fans and the battery pack.

[0017] The rear side and / or the upper side of the battery pack has a second air cooling area, and the second air cooling area is communicated with the first air cooling area through the air cooling channel.

[0018] When the air cooling mechanism and the liquid cooling mechanism work at the same time, the liquid cooling mounting plate, the air cooling channel, the first air cooling area and the second air cooling area collectively perform cooling treatment on each side of each battery monomer.

[0019] In one of the embodiments, it further includes a liquid cooling circuit connected in series with the liquid inlet and the liquid outlet of each liquid cooling mounting plate.

[0020] The liquid cooling circuit includes a liquid cooling pump, a cooling liquid tank and an intercooler, and the intercooler, the cooling liquid tank and the liquid cooling pump are arranged in series; wherein the intercooler is connected with the liquid outlet, and the liquid cooling pump is connected with the liquid inlet to form a circulating liquid cooling flow path for liquid cooling of each battery monomer.

[0021] In one of the embodiments, the cooling assembly further has a second working mode, when the cooling assembly executes the second working mode, the air cooling mechanism and the liquid cooling mechanism are alternately operated to alternately perform air cooling and liquid cooling on each of the battery monomers.

[0022] In one of the embodiments, the cooling assembly further has a third working mode, when the cooling assembly executes the third working mode, the air cooling mechanism is operated alone to perform air cooling on each of the battery monomers.

[0023] And / or, the cooling assembly further has a fourth working mode, when the cooling assembly executes the fourth working mode, the liquid cooling mechanism is operated alone to perform liquid cooling on each of the battery monomers.

[0024] A lithium ion power battery air cooling and liquid cooling collaborative cooling method, adopts the lithium ion power battery air cooling and liquid cooling collaborative cooling system in any one of the above, comprising:

[0025] Obtaining monitoring data, determining a target cooling mode of the cooling assembly based on the monitoring data, wherein the monitoring data includes battery temperature, and the target cooling mode includes one of a first working mode, a second working mode, a third working mode and a fourth working mode.

[0026] According to the monitoring data and the target cooling mode of the cooling assembly, determining a target cooling parameter of the cooling assembly, wherein the target cooling parameter includes the rotating speed of the cooling fan and the flow of the cooling liquid.

[0027] Controlling the air cooling mechanism and / or the liquid cooling mechanism to operate in the target cooling mode and the target cooling parameter.

[0028] Compared with the prior art, the present application has the beneficial effects that:

[0029] By setting the cooling assembly, the cooling assembly includes the air cooling mechanism and the liquid cooling mechanism, and the cooling assembly has a first working mode, when the cooling assembly executes the first working mode, the air cooling mechanism and the liquid cooling mechanism are controlled to work at the same time, thereby realizing air cooling and liquid cooling collaborative cooling processing on each face of each battery monomer of the battery pack, that is, by the collaborative work of the air cooling mechanism and the liquid cooling mechanism, the air cooling mechanism and the liquid cooling installation plate are arranged on different faces of each battery monomer, thereby realizing efficient heat dissipation and cooling processing on all faces of each battery monomer, and improving the heat dissipation and cooling effect of the battery pack.

[0030] And the liquid cooling mechanism comprises at least one liquid cooling mounting plate, by mounting each battery monomer on one liquid cooling mounting plate to form a battery pack, that is, the battery pack formed by combining the liquid cooling mounting plate with the battery monomer, unexpectedly, not only can the battery pack and the liquid cooling mechanism be maximally spatially optimized and arranged, and the complexity of the overall integration is simplified, but also the heat dissipation effect can be greatly improved while the overall size is reduced. By combining the liquid cooling mechanism with the battery monomer, not only can the space occupied by the liquid cooling mechanism be saved, but also the complexity of the overall heat dissipation system and the battery pack integration and the overall volume can be effectively simplified, the space conflict is avoided, and the overall weight is reduced, so as to facilitate the arrangement in the whole vehicle, and in the limited space, the heat dissipation capacity of the heat dissipation system to each battery monomer is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 A working principle schematic diagram of a lithium ion power battery air-cooled and liquid-cooled collaborative heat dissipation system provided in one of the embodiments of the application is shown in the figure.

[0032] Figure 2 A three-dimensional structure schematic diagram of a lithium ion power battery air-cooled and liquid-cooled collaborative heat dissipation system provided in one of the embodiments of the application is shown in the figure. Figure 1

[0033] Figure 3 A connection structure schematic diagram of a battery pack and a limiting mechanism provided in one of the embodiments is shown in the figure.

[0034] Figure 4 A connection structure schematic diagram of a battery monomer and a liquid cooling mounting plate in the figure. Figure 3

[0035] Figure 5 A sectional structure schematic diagram of a bottom liquid cooling plate in the figure. Figure 4

[0036] A sectional structure schematic diagram of a side liquid cooling plate in the figure. Figure 6 Figure 4

[0037] In the figure: 1, battery monomer; 21, heat dissipation fan; 31, liquid cooling mounting plate; 311, liquid inlet; 312, liquid outlet; 313, outer flow channel; 314, inner flow channel; 315, bottom liquid cooling plate; 316, side liquid cooling plate; 32, liquid cooling pump; 33, cooling liquid tank; 34, intercooler; 4, shell; 41, porous heat dissipation plate; 51, first side plate; 52, second side plate; 53, top limiting strip. DETAILED DESCRIPTION

[0038] ​​​​With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of the present application.

[0039] As shown in the accompanying drawings, Figures 1 to 6 The present application provides a wind-cooling and liquid-cooling collaborative heat dissipation system for a lithium-ion power battery, comprising:

[0040] The cooling assembly has a first working mode, and comprises a wind-cooling mechanism and a liquid-cooling mechanism. When the cooling assembly executes the first working mode, the wind-cooling mechanism and the liquid-cooling mechanism operate simultaneously to perform cooling treatment on each face of each battery monomer 1 of the battery pack.

[0041] The liquid-cooling mechanism comprises at least one liquid-cooling mounting plate 31, and each battery monomer 1 is commonly mounted on one liquid-cooling mounting plate 31 to form the battery pack. The wind-cooling mechanism and the liquid-cooling mounting plate 31 are respectively located on different faces of each battery monomer 1.

[0042] In the present embodiment, the cooling assembly is provided, the cooling assembly comprises a wind-cooling mechanism and a liquid-cooling mechanism, and the cooling assembly has a first working mode. When the cooling assembly executes the first working mode, the wind-cooling mechanism and the liquid-cooling mechanism operate simultaneously to perform wind-cooling and liquid-cooling collaborative cooling treatment on each face of each battery monomer 1 of the battery pack. That is, by the collaborative operation of the wind-cooling mechanism and the liquid-cooling mechanism, the wind-cooling mechanism and the liquid-cooling mounting plate 31 are arranged on different faces of each battery monomer 1, so that efficient heat dissipation and cooling treatment can be performed on all faces of each battery monomer 1, and the heat dissipation and cooling effect of the battery pack is improved.

[0043] Further, the liquid-cooling mechanism comprises at least one liquid-cooling mounting plate 31. Each battery monomer 1 is commonly mounted on one liquid-cooling mounting plate 31 to form the battery pack. That is, by combining the liquid-cooling mounting plate 31 and the battery monomer 1 to form the battery pack, the battery pack and the liquid-cooling mechanism can be unexpectedly maximally optimized in space layout and the complexity of overall integration can be simplified. The overall heat dissipation system and the battery pack can be effectively integrated with reduced complexity and overall volume, so that space conflicts are avoided and the overall weight is reduced, facilitating arrangement in a whole vehicle and achieving high-fold improvement of the heat dissipation capacity of the heat dissipation system for each battery monomer 1 in a limited space.

[0044] As shown in the accompanying drawings, Figures 1 to 6As shown, in one embodiment, the liquid-cooled mounting plate 31 is provided with at least one liquid inlet 311 and at least one liquid outlet 312, and the liquid-cooled mounting plate 31 is provided with a plurality of liquid-cooled flow channels, and the liquid inlet 311 is connected to the liquid outlet 312 through the plurality of liquid-cooled flow channels; wherein, the liquid inlet 311 and the liquid outlet 312 are respectively provided on two opposite surfaces of the liquid-cooled mounting plate 31.

[0045] In this embodiment, by providing a plurality of liquid cooling channels within the liquid cooling mounting plate 31, and by providing liquid inlet 311 and liquid outlet 312 on two opposite sides of the liquid cooling mounting plate 31 respectively, that is, by connecting the liquid inlet 311 and liquid outlet 312 on two opposite sides of the liquid cooling mounting plate 31 through the liquid cooling channels, the cooling effect of the liquid cooling mounting plate 31 in efficiently dissipating heat from the battery pack is further improved.

[0046] The inlet 311 and outlet 312 are respectively located at both ends of the "lantern"-shaped liquid cooling zone of the liquid-cooled mounting plate 31 to ensure that the coolant can form a uniform and efficient flow path inside the liquid-cooled plate. The inlet 311 is connected to the external coolant supply equipment (i.e., the liquid cooling circuit) via a high-temperature resistant, corrosion-resistant, and highly flexible pipe, while the outlet 312 is connected to the intercooler 34. The coolant flows from the inlet 311 into the carefully designed complex flow channels inside the liquid-cooled mounting plate 31. These channels are optimized to ensure that the coolant fully contacts the inner surface of the liquid-cooled mounting plate 31, thereby maximizing the absorption of heat dissipated from the individual cells onto the liquid-cooled mounting plate 31. After absorbing heat, the coolant flows out from the outlet 312 and enters the external liquid cooling circuit. In the liquid cooling circuit, the coolant is cooled by various cooling methods (such as air cooling, water cooling, etc.) and after it is restored to a suitable temperature, it flows back to the liquid cooling mounting plate 31 through the liquid inlet 311, forming a continuous and efficient circulating heat dissipation process.

[0047] To precisely control the circulation and heat dissipation of the coolant, a series of high-precision control and monitoring devices were installed on the coolant circulation pipes of the liquid cooling circuit. This allows for precise adjustment of the coolant flow rate based on the real-time heat generation of the battery and the system's heat dissipation requirements, ensuring adequate heat dissipation under various operating conditions. A temperature monitor continuously monitors the coolant temperature and feeds the data back to the control system, enabling timely adjustments to the operating status of the cooling devices in the liquid cooling circuit to ensure the coolant remains within its optimal operating temperature range.

[0048] like Figures 5 to 6 As shown, in one embodiment, when there are multiple liquid cooling channels, the multiple liquid cooling channels include at least one outer channel 313 and multiple inner channels 314. The two ends of the multiple inner channels 314 are connected to the liquid inlet 311 and the liquid outlet 312 respectively through the outer channel 313.

[0049] In this embodiment, by setting multiple inner flow channels 314, and both ends of the multiple inner flow channels 314 are connected to the liquid inlet 311 and the liquid outlet 312 respectively through the outer flow channels 313, that is, by using multiple inner flow channels 314 and at least one outer flow channel 313 in combination, the cooling effect of the liquid cooling mounting plate 31 for efficient heat dissipation of the battery pack can be further improved in a limited space.

[0050] Specifically, the outer flow channel 313 is rectangular in shape, that is, the outer flow channel 313 is connected end to end to form a rectangular flow channel, and multiple inner flow channels 314 are arranged in the rectangular flow channel formed by the outer flow channel 313; wherein, the liquid inlet 311 and the liquid outlet 312 are located at the two ends of the multiple inner flow channels 314 respectively.

[0051] like Figures 5 to 6 As shown, in one embodiment, the outer channels 313 are connected end to end to form a rectangular channel;

[0052] Multiple inner flow channels 314 are spaced apart within the rectangular flow channel formed by the outer flow channel 313, and the multiple inner flow channels 314 together form a lantern-shaped liquid cooling area; wherein, in two adjacent inner flow channels 314, the curvature of the inner flow channel 314 farther from the center is greater than the curvature of the inner flow channel 314 closer to the center.

[0053] In this embodiment, by setting the outer flow channel 313 as a rectangular flow channel and arranging multiple inner flow channels 314 at intervals within the rectangular flow channel frame, the internal structure of the liquid-cooled mounting plate 31 is optimized to improve the heat dissipation and cooling effect of the liquid-cooled mounting plate 31 on the battery. Furthermore, by combining multiple inner flow channels 314 to form a lantern-shaped liquid cooling area, and with the curvature of the inner flow channel 314 furthest from the center being greater than that of the inner flow channel 314 closer to the center, unexpectedly, this arrangement not only makes the liquid cooling flow channel meet the requirements of fluid dynamics but also further improves the heat dissipation effect while reducing fluid flow resistance, ensuring stable battery performance.

[0054] Its unique "lantern"-shaped liquid cooling channel design provides a larger surface area compared to traditional flat plates, giving it a natural advantage in heat exchange with the surrounding environment and the battery, significantly improving heat exchange efficiency. During installation, the liquid cooling mounting plate 31 is tightly fitted around the critical heat-generating areas of the individual battery cells, such as the sides, bottom, or combinations of multiple surfaces, to achieve the most direct and efficient heat conduction. The liquid cooling mounting plate 31 is made of aluminum alloy with ultra-high thermal conductivity. This material not only has excellent thermal conductivity but also good corrosion resistance and mechanical strength, enabling long-term stable operation in complex working environments.

[0055] likeFigures 3 to 4 As shown, in one embodiment, each battery monomer 1 is installed on the liquid cooling mounting plate 31 in a spaced manner, and a wind cooling channel is formed between adjacent two battery monomers 1;

[0056] The wind cooling mechanism includes the wind cooling channel and at least two heat dissipation fans 21 arranged at least one end of the wind cooling channel.

[0057] In this embodiment, by installing each battery monomer 1 on the liquid cooling mounting plate 31 in a spaced manner, a wind cooling channel is formed between adjacent two battery monomers 1, and at least two heat dissipation fans 21 are arranged at at least one end of the wind cooling channel, thereby realizing efficient wind cooling effect of each battery monomer 1.

[0058] The spacing between adjacent two battery monomers 1 is 20mm-60mm, preferably 40mm, so as to enhance the heat dissipation effect between the battery monomers 1. The battery pack can be composed of eight battery monomers 1 arranged side by side. By arranging in a spaced manner, on the one hand, it ensures that air can flow freely between the battery monomers 1, forming an efficient wind cooling channel; on the other hand, it also reserves sufficient and appropriate space for the installation of subsequent heat dissipation components such as the liquid cooling mounting plate 31, thereby ensuring that each part of the entire heat dissipation system can work in coordination.

[0059] As shown in the drawings, Figures 3 to 4 In one embodiment, the liquid cooling mounting plate 31 is provided with multiple liquid cooling mounting plates 31, which include a bottom liquid cooling plate 315 connected with each battery monomer 1 and a side liquid cooling plate 316 located at both sides of the battery pack, and the bottom liquid cooling plate 315 is attached to one side of each battery monomer 1, and the side liquid cooling plate 316 is attached to one side of the adjacent battery monomer 1;

[0060] The two heat dissipation fans 21 are located at the front side of the battery pack, and a first wind cooling area is formed between the heat dissipation fan 21 and the battery pack;

[0061] The rear side and / or the upper side of the battery pack has a second wind cooling area, and the second wind cooling area is in communication with the first wind cooling area through the wind cooling channel;

[0062] When the wind cooling mechanism and the liquid cooling mechanism work at the same time, the liquid cooling mounting plate 31, the wind cooling channel, the first wind cooling area and the second wind cooling area jointly cool each side of each battery monomer 1.

[0063] In the present embodiment, by arranging multiple liquid cooling mounting plates 31 in contact with one or more surfaces of each battery cell, efficient cooling of each battery cell 1 is achieved. The remaining surfaces of each battery cell 1 are provided with air cooling channels, first air cooling zones and second air cooling zones, so that air cooling of the individual battery cells is achieved by the air cooling fan 21. The design of the air cooling channels, first air cooling zones and second air cooling zones can guide air to flow evenly over the surface of the battery pack, carrying away the heat generated by the battery.

[0064] The air cooling fan 21 has the characteristics of large air volume, low noise and high reliability, and can provide sufficient air flow power. When the air cooling fan 21 is started, it generates strong suction to suck cold air from the outside into the housing 4. The cold air flows between the battery cells 1 in the housing 4 and fully contacts the battery cells 1 and the "lantern" shaped liquid cooling plate, carrying away part of the heat. In this process, the air cooling mechanism and the liquid cooling mechanism cooperate to form a synergistic cooling effect. Air cooling can accelerate the air convection on the surface of the liquid cooling mounting plate 31, so that the heat on the liquid cooling mounting plate 31 can be dissipated more quickly to the surrounding air, strengthening the cooling effect of the liquid cooling mounting plate 31; at the same time, the cold air also directly cools the surface of the battery cell 1, further improving the cooling efficiency of the entire system. The heated air is discharged from the system, completing a complete air cooling cycle.

[0065] As shown in Figures 1 to 2 one of the embodiments, a liquid cooling circuit is further provided in series with the liquid inlet 311 and the liquid outlet 312 of each liquid cooling mounting plate 31.

[0066] The liquid cooling circuit includes a liquid cooling pump 32, a cooling liquid tank 33 and an intercooler 34, which are arranged in series. The intercooler 34 is connected to the liquid outlet 312, and the liquid cooling pump 32 is connected to the liquid inlet 311, so as to form a circulating liquid cooling flow path for liquid cooling of the battery cells 1.

[0067] In the present embodiment, the liquid cooling circuit is arranged in series with the liquid inlet 311 and the liquid outlet 312 of the liquid cooling mounting plate 31, so as to perform circulating liquid cooling of the battery cells 1.

[0068] Specifically, when liquid cooling is used, the liquid cooling pump 32 is started to pump the cooling liquid from the cooling liquid tank 33, through the liquid cooling pipeline, into the liquid cooling flow path. Since the liquid cooling mounting plate 31 is in contact with the battery cell 1, the cooling liquid flowing through the liquid cooling flow path can quickly absorb the heat generated by the battery, so as to carry away the heat of the battery and flow out from the liquid outlet 312. The heat-exchanged liquid flows into the outlet pipe through the liquid outlet 312, and then enters the intercooler 34. The intercooler 34 sends the heat-exchanged liquid into the cooling liquid tank 33, so as to circulate and flow repeatedly, so as to cool the battery cells 1.

[0069] In one of the embodiments, the cooling assembly further has a second working mode, when the cooling assembly executes the second working mode, the air cooling mechanism and the liquid cooling mechanism are alternately operated to alternately perform air cooling and liquid cooling on each battery monomer 1.

[0070] In the embodiment, by setting the second working mode, the air cooling mechanism and the liquid cooling mechanism are alternately operated to alternately perform air cooling and liquid cooling on each battery monomer 1, so as to achieve the effect of balanced cooling.

[0071] In one of the embodiments, the cooling assembly further has a third working mode, when the cooling assembly executes the third working mode, the air cooling mechanism is operated alone to perform air cooling on each battery monomer 1.

[0072] And / or, the cooling assembly further has a fourth working mode, when the cooling assembly executes the fourth working mode, the liquid cooling mechanism is operated alone to perform liquid cooling on each battery monomer 1.

[0073] In the embodiment, by setting the third working mode and the fourth working mode, the liquid cooling mechanism or the air cooling mechanism is operated alone to perform liquid cooling or air cooling on each battery monomer 1, so as to meet the actual working requirements.

[0074] As shown in Figures 1 to 4 In one of the embodiments, the battery pack is installed in the shell 4 through the limiting mechanism, and is located at the middle position of the shell 4, that is, there is a preset distance between the four walls of the battery pack and the four inner walls of the shell 4, so as to form an air cooling heat dissipation area, and the air cooling heat dissipation area includes a first air cooling area and a second air cooling area.

[0075] As shown in Figures 1 to 4 In one of the embodiments, the shell 4 includes a plurality of porous heat dissipation plates 41, two porous heat dissipation plates 41 are arranged at two ends of the air cooling channel respectively, and at least one porous heat dissipation plate 41 is provided with a heat dissipation fan 21 to perform air cooling heat dissipation on the battery monomer 1. In addition, the shell 4 further includes a bottom plate, and the porous heat dissipation plate 41 is connected with the bottom plate by laser welding.

[0076] By installing two porous heat dissipation plates 41 on the shell 4 respectively at both ends of the air cooling channel, the porous heat dissipation plates 41 can also effectively intercept impurities and prevent them from entering the system interior, thereby avoiding damage to the battery and cooling components and ensuring a clean environment inside the system. At the same time, the structural design of the porous heat dissipation plates 41 also takes into account the principle of aerodynamics, which can optimize the uniformity of air inflow, so that cold air can enter the air cooling channel and the first and second air cooling areas more smoothly and uniformly, improving the uniformity and stability of the air cooling effect. The porous heat dissipation plates 41 can guide the heated air in the system to be discharged smoothly. The shape, size, and vent design of the porous heat dissipation plates 41 have been carefully optimized to ensure that hot air can flow out smoothly while minimizing air backflow and resistance, thereby improving air circulation efficiency.

[0077] As needed, the porous heat dissipation plates 41 can also be equipped with multiple layers of fine filter screen structures to further improve the effect of intercepting dust, particulate pollutants, and other impurities in the air, preventing them from entering the shell 4 interior, thereby avoiding damage to the battery monomers 1 and cooling components and ensuring a clean environment inside the shell 4.

[0078] As shown in Figures 1 to 4 one embodiment, the limiting mechanism includes two first side plates 51, two second side plates 52, and a top limiting bar 53. The two first side plates 51 are arranged in the front-rear direction of the battery pack, i.e., at both ends of the air cooling channel. The two first side plates 51 are connected to the bottom liquid cooling plate 315 and the bottom plate, respectively. The two second side plates 52 are connected to the bottom plate and the side liquid cooling plates 316 on both sides of the battery pack. The top of the shell 4 is empty, and the top limiting bar 53 is installed on the top of the shell 4, with both ends of the top limiting bar 53 connected to the side plates on both sides of the shell 4. This achieves stable connection of each face of the battery pack and fast and stable installation in the shell 4. The limiting mechanism is connected to the bottom plate by bolts, and the two top limiting bars 53 install the battery pack, the side liquid cooling plates 316 at both ends, and the upper part of the second side plates 52 by fasteners, thereby achieving stable installation of the entire battery pack.

[0079] The application can quickly and effectively take away the heat generated by the battery by combining the double heat dissipation modes of air cooling and liquid cooling. The air cooling mechanism and the liquid cooling mechanism work cooperatively. When the battery pack temperature is not high, the air cooling mechanism works alone, which is conducive to reducing the use cost. The air cooling mechanism and the liquid cooling mechanism work independently and cooperatively. When one of them (air cooling mechanism or liquid cooling mechanism) fails, the other (air cooling mechanism or liquid cooling mechanism) can still guarantee the heat dissipation demand of the battery pack to a certain extent, improving the reliability and stability of the whole heat dissipation system. At the same time, by designing the "lantern" shaped liquid cooling plate, the temperature fluctuation of the battery pack can be controlled within a small range, which not only meets the requirements of fluid dynamics and reduces the fluid flow resistance, but also significantly improves the heat dissipation efficiency, further improves the heat dissipation effect, and guarantees the stability of the battery performance. The heat dissipation components of the liquid cooling mechanism can be flexibly arranged according to the needs, which is beneficial to the optimization of the internal space of the equipment and makes the appearance of the equipment more simple and beautiful. The heat dissipation system can be applied to different types and specifications of battery packs, which can meet the needs of various application scenarios such as new energy vehicles and energy storage systems, and has wide application prospect.

[0080] A lithium ion power battery air-cooled liquid-cooled collaborative heat dissipation method adopts a lithium ion power battery air-cooled liquid-cooled collaborative heat dissipation system according to any one of the above, comprising:

[0081] S1, obtaining monitoring data, and determining a target heat dissipation mode of the cooling assembly based on the monitoring data; wherein the monitoring data includes battery temperature, and the target heat dissipation mode includes one of a first working mode, a second working mode, a third working mode and a fourth working mode;

[0082] It should be noted that the surface temperature of the battery and the temperature, flow data of the cooling liquid are collected in real time and accurately by the plurality of monitoring components distributed on the surface of the battery monomer and the cooling liquid circulation path. The monitoring components include temperature sensors, humidity sensors, flow sensors and flow rate sensors, etc. These sensors have the characteristics of high sensitivity, high precision and fast response, and can capture the small changes in temperature in time. The following data is collected in real time using the monitoring components to obtain the monitoring data,

[0083] Based on the collected monitoring data, the preset complex algorithm model is used for analysis and processing. Considering the working state of the battery monomer 1, the environmental temperature, the cooling liquid flow and the temperature and other factors, the speed of the fan and the flow of the cooling liquid can be intelligently adjusted according to the actual situation. When the battery temperature is at a low level, the speed of the cooling fan 21 and the flow of the cooling liquid delivered to the liquid cooling mounting plate 31 are automatically reduced to reduce energy consumption and realize energy-saving operation; when the battery temperature rises and approaches or exceeds the set warning temperature, the system quickly increases the speed of the cooling fan 21 and the flow of the cooling liquid delivered to the liquid cooling mounting plate 31 to enhance the cooling intensity, so that the battery always works in the appropriate temperature range, and the performance and service life of the battery are not affected due to overheating. According to the needs, the working state (SOC, current I, voltage V) of the battery can also be obtained through the SOC estimation module and the current sensor, and / or the working state of the battery such as current, voltage and state of charge can be obtained through the BMS (battery management system).

[0084] The monitoring data includes:

[0085] The battery temperature T b (unit: ℃), which can be the average temperature of each battery monomer 1, or the battery temperature T b monitored at a preset position; b The preset position is the upper part of the battery monomer 1 located in the middle of the battery pack, close to the positive electrode (the temperature here is the highest when working), and the temperature sensor can be a hot-wire temperature sensor to measure the temperature of the battery.

[0086] The speed R f of the cooling fan (unit: RPM);

[0087] The flow Q in of the cooling liquid at the liquid inlet 311 (unit: L / min), and the flow rate V in of the cooling liquid at the liquid inlet 311 (unit: m / s);

[0088] The flow Q out of the cooling liquid at the liquid outlet 312 (unit: L / min), and the flow rate V out of the cooling liquid at the liquid outlet 312 (unit: m / s);

[0089] The environmental temperature T e (unit: ℃), which can be the environmental temperature inside the shell 4 or the environmental temperature outside the shell 4, and is set according to actual needs;

[0090] The environmental humidity H e (unit: %), which can be the environmental temperature inside the shell 4 or the environmental temperature outside the shell 4, and is taken as the higher humidity;

[0091] The thermal load P is calculated according to the battery current and the battery voltage.

[0092] It should be noted that after obtaining the monitoring data, the Kalman filtering algorithm can be used to process the sensor noise to smooth the monitoring data. The formula is as follows:

[0093]

[0094] Wherein, is the filtered state estimation, is the predicted state, z k is the measurement value, K k is the Kalman gain, and H is the observation matrix.

[0095] Based on the battery temperature T b , the ambient temperature T e , the ambient humidity H e and the thermal load P, a decision tree is constructed, and the target heat dissipation mode of the cooling assembly is determined according to the decision tree and the monitoring data; wherein the rules of the decision tree are defined as follows:

[0096] If T b <40℃, T e <30℃, H e <70%, and P<50%; the third working mode is executed, that is, the air cooling is operated alone, that is, the liquid cooling pump is closed, and the cooling fan is operated,

[0097] If 40℃≤T b <50℃, or H e ≥70%, or T e ≥30℃; the fourth working mode is executed, that is, the liquid cooling is operated alone, that is, the cooling fan is closed, and the liquid cooling pump is operated;

[0098] If 40℃≤T b <50℃, and the battery temperature fluctuation rate ΔT b >2℃ / min; the second working mode is executed, that is, the air cooling and the liquid cooling are alternately operated, that is, the start and stop of the cooling fan and the liquid cooling pump are switched at a preset time interval (such as 10 minutes).

[0099] If T b ≥50℃, or P≥80%, the first working mode is executed, that is, the air cooling and the liquid cooling are operated simultaneously, that is, the cooling fan and the liquid cooling pump are operated simultaneously;

[0100] where P is the thermal load of the battery system, representing the current working load of the battery, reflecting the operation intensity or energy output level of the battery. is a normalized index to determine whether the operation state of the battery needs a high-intensity cooling mode (such as simultaneous operation of air cooling and liquid cooling). The thermal load P is usually estimated by the electrical power output of the battery, representing the proportion of the current working intensity of the battery relative to its rated power. The calculation steps are as follows:

[0101] Obtain the battery operation parameters:

[0102] Battery current output power P elec (unit: W), which can be calculated by voltage V and current I: P elec = V·I;

[0103] Battery rated power P rated (unit: W), which is the maximum output power of the battery at the design stage, and can be provided by the manufacturer.

[0104] Calculate the thermal load percentage:

[0105] Battery temperature fluctuation rate ΔT b is calculated by the following formula:

[0106] where Δt is the sampling time interval (for example, 1 minute), T b (t) represents the battery temperature at the current time (t), which is collected in real time by the temperature sensor, T b (t-Δt) represents the battery temperature at the last time (t-Δt), which is obtained from historical data.

[0107] Alternatively, a machine learning model (such as K-nearest neighbors or neural network) can also be used to optimize mode selection as needed. The input features include normalized T b ′, T e ′, H e ′, P′, and the output is the probability distribution of the four modes. The training data can be based on historical operation data, combined with the Step-KTO optimization algorithm, and the loss function is: T Step-KTO =∑ i λ D ·log(P(Mode i |X))

[0108] where λ D is the weight, P(Mode i |X) is the predicted probability of mode i, and X is the input feature vector.

[0109] S2, according to the monitoring data and the target cooling mode of the cooling assembly, determine the target cooling parameters of the cooling assembly;

[0110] S21, if the target heat dissipation mode is the third working mode, a dynamic air cooling regulation curve is constructed, and the air cooling mechanism is controlled to operate based on the dynamic air cooling regulation curve;

[0111] Specifically, the dynamic air cooling regulation curve can be obtained according to the battery temperature T b , the battery target temperature T t , the maximum battery temperature difference ΔT c , the ambient temperature T e , the speed base coefficient a (default value 1000) and the dynamic weight coefficients K1, K2 and K3; wherein K1, K2 and K3 are obtained by dynamically adjusting according to the maximum battery temperature difference ΔT c , the ambient temperature T e and the temperature rise rate, and K1+K2+K3=1, for example:

[0112]

[0113] wherein, is an exponential compensation term of the ambient temperature; for example, when the ambient temperature is higher than 25℃, increases, increasing the fan speed; when it is lower than 25℃, decreases, reducing the fan speed, the maximum battery temperature difference ΔT c is the difference between the maximum battery temperature T b and the minimum battery temperature T b of each battery monomer 1.

[0114] By setting the third working mode, the air cooling mechanism is controlled to operate alone, so as to directly dissipate heat to the environment through the cooling fan in a low heat load scenario, reduce energy consumption and operating cost, and achieve high efficiency, energy saving, simple structure, convenient maintenance, and low installation and maintenance cost. At the same time, the speed of the cooling fan can also be quickly adjusted through the PWM signal, with a short response time (usually <1 second), which can achieve fast response and is suitable for responding to instantaneous heat load changes. Moreover, in a low temperature and low humidity environment, the air cooling can operate efficiently, with good environmental adaptability. It can effectively remove a small amount of heat generated by the battery or device during low-power operation (such as low-speed driving of an electric vehicle), and maintain the temperature within a safe range.

[0115] S22, if the target heat dissipation mode is the fourth working mode, an adaptive PID control model is constructed, and the liquid cooling mechanism is controlled to operate based on the adaptive PID control model;

[0116] Specifically, the adaptive PID control model can be obtained according to the battery real-time temperature deviation e(t), the battery temperature rise rate temperature rise rate gain coefficient; the PID controller is used to dynamically adjust the parameters; for example:

[0117]

[0118] wherein e(t) = T b -T t , T t is the target battery temperature, u(t) is the control quantity (for example: coolant flow Q * ), K p , K i , K d is the proportional, integral, and derivative gain, is the error change rate, and ∫e(t)dt is the error integral.

[0119] By setting the fourth working mode, the liquid cooling mechanism is controlled to run alone, and the heat is absorbed and transferred by the coolant, and the heat dissipation capacity is much higher than air cooling, which can realize the effect of efficient heat dissipation, and is suitable for medium and high heat load; and the liquid cooling mechanism adopts closed circulation, avoids direct contact of cold air with the surface of the battery, reduces the risk of condensation, the liquid cooling plate is close to the surface of the battery, the heat is evenly distributed, and local overheating is prevented, and the battery life is improved. In high temperature or high humidity environment, liquid cooling can still run efficiently, not limited by air circulation, and has strong environmental adaptability. It can quickly remove the heat of the battery or equipment when running at medium power (such as fast charging of electric vehicles), and maintain the temperature within a safe range. Through closed coolant circulation, condensate is prevented from being generated in high humidity environment, and the battery is protected from corrosion or short circuit. When the ambient temperature is high, the liquid cooling maintains efficient heat dissipation through coolant circulation, makes up for the insufficient efficiency of air cooling, and is well adapted to high temperature environment.

[0120] S23, if the target heat dissipation mode is the second working mode, the air cooling mechanism and the liquid cooling mechanism are controlled to alternately run based on a preset rule to alternately air cool and liquid cool the battery pack.

[0121] wherein the preset rule can be obtained based on historical data or user customization, and the preset rule includes a preset running time of the air cooling mechanism, a preset running speed of the air cooling mechanism, a preset running time of the liquid cooling mechanism, a preset running speed of the liquid cooling mechanism, and an interval time length of switching between the air cooling mechanism and the liquid cooling mechanism.

[0122] Through the second working mode, the air cooling mechanism and the liquid cooling mechanism are alternately operated, which flexibly responds to temperature fluctuations, optimizes heat dissipation efficiency and energy consumption, and realizes dynamic thermal management effect, avoids long-time high-load operation of a single mechanism (air cooling mechanism or liquid cooling mechanism), reduces mechanical wear and maintenance frequency, and prolongs the service life of the equipment; under dynamic working conditions, the total energy consumption can be reduced (such as switching to air cooling after 10 minutes of liquid cooling), which is more energy-saving than simultaneous operation, and the energy consumption and efficiency are balanced; through dynamic switching, the system stability is maintained, and the adaptability to the environment is optimized; the problem of thermal management caused by rapid change of battery temperature (such as frequent start-stop of electric vehicles) is solved, the temperature is kept stable, and the temperature fluctuation is effectively managed. Through alternate operation, the heat dissipation fan or the liquid cooling pump is prevented from running for a long time under high load, so as to realize equipment overload protection and prolong the service life of the equipment. Under medium heat load and dynamic working conditions, the unnecessary running time of the liquid cooling pump is reduced, and the energy consumption is reduced.

[0123] S23, if the target heat dissipation mode is the first working mode, the speed of the heat dissipation fan and the flow of the cooling liquid are calculated according to the preset algorithm, a PID controller is used to calculate the correction amount of the speed of the heat dissipation fan 21 and the flow of the cooling liquid, and the speed of the heat dissipation fan and the flow of the cooling liquid are dynamically adjusted based on the corresponding correction amount to obtain the target speed of the heat dissipation fan and the target flow of the inlet, and the target speed of the heat dissipation fan and the target flow of the inlet are used as the target heat dissipation parameters of the cooling assembly. For example:

[0124] S231, the speed of the heat dissipation fan is calculated

[0125] Wherein, ΔT=T b -T e , the difference between the battery temperature and the ambient temperature.

[0126] ΔT max is the maximum temperature difference threshold, which represents the maximum temperature difference allowed, and is set according to the actual heat dissipation demand (such as through thermal simulation analysis or experimental test to determine the temperature difference demand of the battery under maximum heat load), such as ΔT max = 30℃, to ensure that the battery temperature T b does not exceed the safety range (for example, 60℃).

[0127] R f,min is the minimum speed, R f,max is the maximum speed, (such as R f,min = 1000RPM, R f,max = 5000RPM).

[0128] S232, the flow Q of the cooling liquid is calculated * :

[0129] Among them, Q heat The heat load is expressed in W, ρ is the coolant density, and c is the heat load. p T represents the specific heat capacity of the coolant. out -T in The temperature difference between the inlet 311 and the outlet 312. Heat load Q. heat This represents the actual heat generated during battery operation, calculated through heat balance or energy conversion efficiency.

[0130] Q heat =Q Joule +Q chem ;

[0131] Q Joule =I 2 ·R int ;

[0132] Q chem ≈(1-η)·P elec Among them, P elec =V·I, where η is the battery energy conversion efficiency (provided by the manufacturer or determined experimentally).

[0133] That is: Q heat =I 2 ·R int +(1-η)·V·I;

[0134] Among them, R int I is the battery internal resistance (unit: Ω, obtainable from battery specifications), I is the battery current (unit: A), and Q is the battery current. Joule For Joule heating, Q chem It is the heat of electrochemical reaction.

[0135] S233. Use a PID controller to dynamically adjust parameters.

[0136] Where, e(t) = T b -T t u(t) is the correction value, K p K i K d For proportional, integral, and differential gains.

[0137] S234. Based on the corresponding correction amounts, the speed of the cooling fan 21 and the coolant flow rate are dynamically adjusted, such as the target speed of the cooling fan. The target flow rate Q of the total coolant flow rate entering the liquid cooling mounting plate 31 t =Q * +u(t);

[0138] By setting the first working mode, combining the air cooling mechanism and the liquid cooling mechanism, the strongest cooling capacity is provided to quickly remove a large amount of heat, quickly reduce the temperature when the battery temperature is too high or the heat load is extremely high, and prevent thermal runaway. Through the cooperative work of the double systems, the redundant cooling capacity is provided to enhance the stability and reliability of the system under extreme working conditions. The air cooling can assist the liquid cooling mechanism to quickly dry the moisture (such as high environmental humidity), reduce the condensation risk; solve the heat dissipation demand during high-power operation (such as high load of fuel cell engine or rapid charging of electric vehicle), and maintain the temperature in the safe range (<45℃). When the battery temperature approaches the dangerous threshold (for example, 60℃), the temperature is quickly reduced to prevent thermal runaway or performance degradation. In a high-temperature and high-humidity environment or under extreme load, reliable cooling support is provided to adapt to complex working conditions. Through air cooling assistance, the condensate that may occur is quickly evaporated to protect the equipment from moisture damage.

[0139] S3, controlling the air cooling mechanism and / or the liquid cooling mechanism to operate in a target cooling mode and target cooling parameters.

[0140] According to the need, the liquid cooling circuit is also provided with an electromagnetic valve, and the target rotation speed R t and the target flow rate Q t of the cooling fan 21 of the calculated target cooling parameters are respectively sent to the controller of the cooling fan 21 and the controller of the liquid cooling pump 32 or the electromagnetic valve, and the rotation speed of the cooling fan 21 can be controlled through a PWM (pulse width modulation) signal, and the power of the liquid cooling pump 32 or the opening degree of the electromagnetic valve is adjusted through a frequency converter, so as to realize dynamic adjustment of the air cooling mechanism and / or the liquid cooling mechanism.

[0141] According to the need, the cooling method of the application can also determine the target cooling mode of the cooling assembly only according to the battery temperature data measured by the temperature sensor. Specifically: when the battery temperature data measured by the temperature sensor shows that the battery temperature is lower than 40℃, the air cooling motor drives the cooling fan 21 to operate, and the air cooling is started; when the measured battery temperature is 40℃-50℃, the liquid cooling pump 32 of the liquid cooling circuit is started to pump the liquid in the cooling liquid tank 33 into the liquid cooling channel through the liquid cooling pipe to perform liquid cooling on the battery pack; when the display temperature exceeds 50℃, the air cooling mechanism and the liquid cooling mechanism work simultaneously to perform double cooling on the battery pack.

[0142] The liquid cooling circuit is also provided with a heating unit, and the inlet temperature T in of the cooling liquid is accurately controlled by the heating unit to ensure that the surface temperature of the battery is higher than the dew point temperature T dew . T in > T dew + ΔT safe , wherein ΔT safe is a safety margin.

[0143] The dew point temperature can be calculated by the ambient temperature T e and the humidity H e . For example:

[0144] If T e = 30℃, H e = 80%, ΔT safe = 5℃, then:

[0145] The liquid cooling mechanism keeps T b ≥ 30℃, avoiding the surface temperature below T dew , so as to prevent condensation.

[0146] According to the needs, the system is also provided with a fault warning module. This module monitors the key parameters of the system in real time, and once it detects temperature abnormalities, cooling liquid leakage, cooling fan 21 failure or other key parameters exceeding the normal range, etc., it immediately issues an alarm and prompts the maintenance personnel through various ways (such as audible and visual alarm, SMS notification, network push, etc.) to check and handle in a timely manner. At the same time, the system can also record the relevant data before and after the fault occurs, providing detailed reference for fault analysis and elimination, so as to quickly restore the normal operation of the system.

[0147] The foregoing description of specific exemplary embodiments of the application is intended to be illustrative only and is not intended to limit the application to the precise forms described. Many modifications and variations are possible in light of the above teachings without departing from the spirit or essential characteristics of the application. To the extent that the application seeks to claim any of the specific embodiments described herein, it is intended to encompass modifications and variations of those described specific embodiments that are within the scope of the present application. The specific features, structures, materials or characteristics described are for illustrative purposes only and are not intended to limit the scope of the application. The exemplary embodiments are selected and described for the purpose of explaining the particular principles of the application and its practical application, so that those skilled in the art can understand the principles of the application and its practical application after reading the specification, and can make modifications, substitutions, variations and various different selections and changes to the embodiments without creative contribution, as long as they are within the scope of the claims of the present application.

Claims

1. A lithium-ion power battery air-cooled and liquid-cooled combined heat dissipation system, characterized in that, include: A cooling component has a first working mode, the cooling component includes an air cooling mechanism and a liquid cooling mechanism; wherein, when the cooling component executes the first working mode, the air cooling mechanism and the liquid cooling mechanism operate simultaneously to cool down each surface of each battery cell in the battery pack. The liquid cooling mechanism includes at least one liquid cooling mounting plate, and all the battery cells are mounted together on the liquid cooling mounting plate to form the battery pack; wherein the air cooling mechanism and the liquid cooling mounting plate are located on different surfaces of each battery cell.

2. The lithium-ion power battery air-cooled and liquid-cooled combined heat dissipation system according to claim 1, characterized in that, The liquid-cooled mounting plate is provided with at least one liquid inlet and at least one liquid outlet, and the liquid-cooled mounting plate is provided with a plurality of liquid-cooled flow channels. The liquid inlet is connected to the liquid outlet through the plurality of liquid-cooled flow channels. The liquid inlet and the liquid outlet are respectively provided on two opposite surfaces of the liquid-cooled mounting plate.

3. The lithium-ion power battery air-cooled and liquid-cooled combined heat dissipation system according to claim 2, characterized in that, When there are multiple liquid cooling channels, each liquid cooling channel includes at least one outer channel and multiple inner channels. The two ends of each inner channel are connected to the liquid inlet and the liquid outlet respectively through the outer channel.

4. The lithium-ion power battery air-cooled and liquid-cooled combined heat dissipation system according to claim 3, characterized in that, The outer flow channels are connected end to end to form a rectangular flow channel; Multiple inner flow channels are spaced apart within the rectangular flow channel frame formed by the outer flow channel, and the multiple inner flow channels together form a lantern-shaped liquid cooling zone; wherein, in two adjacent inner flow channels, the curvature of the inner flow channel farther from the center is greater than the curvature of the inner flow channel closer to the center.

5. A lithium-ion power battery air-cooled and liquid-cooled combined heat dissipation system according to claim 1, characterized in that, Each of the battery cells is mounted at intervals on the liquid-cooled mounting plate, and an air-cooling channel is formed between two adjacent battery cells. The air-cooling mechanism includes the air-cooling channel and at least two cooling fans disposed at at least one end of the air-cooling channel.

6. A lithium-ion power battery air-cooled and liquid-cooled combined heat dissipation system according to claim 5, characterized in that, The liquid cooling mounting plate is provided in multiple parts, each liquid cooling mounting plate including a bottom liquid cooling plate connected to each battery cell and side liquid cooling plates located on both sides of the battery pack, wherein the bottom liquid cooling plate is in contact with one side of each battery cell, and the side liquid cooling plate is in contact with one side of the adjacent battery cell. The two cooling fans are located on the front side of the battery pack, and a first air-cooling zone is formed between the cooling fans and the battery pack; The battery pack has a second air-cooling zone on its rear side and / or top, and the second air-cooling zone is connected to the first air-cooling zone through the air-cooling channel; When the air-cooling mechanism and the liquid-cooling mechanism work simultaneously, the liquid-cooled mounting plate, the air-cooling channel, the first air-cooling zone, and the second air-cooling zone work together to cool down each surface of each battery cell.

7. A lithium-ion power battery air-cooled and liquid-cooled combined heat dissipation system according to claim 1, characterized in that, It also includes a liquid cooling circuit connected in series with the liquid inlet and liquid outlet of each of the liquid cooling mounting plates; The liquid cooling circuit includes a liquid cooling pump, a coolant tank, and an intercooler, which are connected in series. The intercooler is connected to the liquid outlet, and the liquid cooling pump is connected to the liquid inlet to form a circulating liquid cooling flow path for liquid cooling of each battery cell.

8. A lithium-ion power battery air-cooled and liquid-cooled combined heat dissipation system according to claim 1, characterized in that, The cooling component also has a second working mode. When the cooling component performs the second working mode, the air cooling mechanism and the liquid cooling mechanism operate alternately to alternately perform air cooling and liquid cooling on each of the battery cells.

9. A lithium-ion power battery air-cooled and liquid-cooled combined heat dissipation system according to claim 1, characterized in that, The cooling component also has a third working mode. When the cooling component executes the third working mode, the air-cooling mechanism operates independently to perform air-cooling cooling on each of the battery cells. And / or, the cooling component also has a fourth operating mode, in which the liquid cooling mechanism operates independently to liquid cool each of the battery cells when the cooling component performs the fourth operating mode.

10. A method for combined air-cooling and liquid-cooling heat dissipation of a lithium-ion power battery according to claim 1, wherein a combined air-cooling and liquid-cooling heat dissipation system for a lithium-ion power battery as described in any one of claims 1-9 is characterized in that, include: Acquire monitoring data and determine the target heat dissipation mode of the cooling component based on the monitoring data; wherein the monitoring data includes battery temperature, and the target heat dissipation mode includes one of a first working mode, a second working mode, a third working mode, and a fourth working mode; Based on the monitoring data and the target heat dissipation mode of the cooling component, the target heat dissipation parameters of the cooling component are determined; wherein, the target heat dissipation parameters include the speed of the cooling fan and the flow rate of the coolant. Control the air-cooling mechanism and / or the liquid-cooling mechanism to operate in the target heat dissipation mode and the target heat dissipation parameters.

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