High-power and high-energy-density battery composite heat dissipation system

Abstract

This invention provides a high-power and high-energy-density battery composite heat dissipation system, relating to the field of battery thermal management technology. The high-power battery area utilizes a first cooling plate with a non-uniform flow channel (dense at the top, sparse at the bottom) to precisely match the non-uniform heat generation of the battery cells, effectively reducing the temperature difference between the upper and lower parts of the battery and preventing localized overheating. The high-energy-density battery area utilizes a second cooling plate with a shared cooling channel for both air cooling and liquid cooling, resulting in a compact structure and high space utilization. The air cooling mode meets low-load energy-saving operation, while the liquid cooling mode provides powerful heat dissipation with rapid switching and minimal temperature control lag. A semi-circular baffle-type flow regulating valve, combined with an intelligent control algorithm, achieves stepless distribution of coolant between the two areas as needed, balancing power performance and battery life. The overall heat dissipation system addresses both the instantaneous heat dissipation requirements of high-power batteries and the long-term temperature uniformity requirements of high-energy batteries, improving the safety and reliability of the battery system.

Description

Technical Field

[0001] This invention relates to the field of battery thermal management technology, and more specifically to a high-power and high-energy-density battery composite heat dissipation system. Background Technology

[0002] In recent years, new energy commercial vehicles have required a balance between instantaneous high-power output and long driving range, making the coordinated use of high-power-density and high-energy-density batteries the mainstream technological approach. High-power-density batteries discharge at high rates during start-up and hill climbing, resulting in concentrated heat generation and rapid temperature rise; high-energy-density batteries, on the other hand, discharge at low rates for extended periods, leading to slow heat accumulation and requiring high temperature uniformity. The significant differences in the operating characteristics of these two types of batteries make it difficult to accommodate both using traditional uniform heat dissipation structures, resulting in issues such as low matching, insufficient heat dissipation for high-power batteries, and poor temperature uniformity for high-energy batteries. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a high-power and high-energy-density battery composite heat dissipation system, which solves the problems of insufficient heat dissipation of high-power batteries and poor temperature uniformity of high-energy batteries in new energy commercial vehicles.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-power and high-energy-density battery composite heat dissipation system, the heat dissipation system comprising: a first current collector wall, a second current collector wall, a third current collector wall, a first cooling plate, and a second cooling plate;

[0008] The first, second, and third flow collector walls are arranged in parallel, and the first and second cooling plates are arranged perpendicular to the first flow collector wall. The first and second flow collector walls are connected by multiple sets of first cooling plates, and the first and third flow collector walls are connected by multiple sets of second cooling plates.

[0009] High-power-density battery modules are arranged between adjacent first cooling plates, and high-energy-density battery modules are arranged between adjacent second cooling plates.

[0010] The first collecting wall has a first collecting cavity and a second collecting cavity, which are separated by a heat insulation plate; the second collecting wall has a third collecting cavity; the third collecting wall has a fourth collecting cavity; the first cooling plate has multiple liquid cooling medium channels along its length, which are arranged in a non-uniform pattern with denser channels at the top and sparser channels at the bottom; the second cooling plate has cooling channels along its length; the first collecting cavity and the third collecting cavity are connected by the liquid cooling medium channels; the second collecting cavity and the fourth collecting cavity are connected by the cooling channels.

[0011] The first manifold wall is provided with a liquid-cooled inlet and an air-cooled inlet; the liquid-cooled inlet is connected to the first manifold cavity and the second manifold cavity, and the air-cooled inlet is connected to the second manifold cavity; the liquid-cooled inlet is connected to the liquid-cooled medium supply assembly through a liquid-cooled medium flow regulating valve, which is used to regulate the flow distribution ratio of the liquid-cooled medium to the first manifold cavity and the second manifold cavity; the air-cooled inlet is connected to the fan through an air-cooled inlet valve;

[0012] The second manifold wall is equipped with a first liquid-cooled outlet. The liquid-cooled medium entering the first manifold cavity flows through the liquid-cooled medium flow channel into the third manifold cavity and finally flows out from the first liquid-cooled outlet, which is equipped with a first liquid-cooled outlet valve. The third manifold wall has a second liquid-cooled outlet and an air-cooled outlet. In liquid-cooled mode, the liquid-cooled medium entering the second manifold cavity flows through the cooling channel into the fourth manifold cavity and finally flows out from the second liquid-cooled outlet, which is equipped with a second liquid-cooled outlet valve. In air-cooled mode, the air-cooled medium entering the second manifold cavity flows through the cooling channel into the fourth manifold cavity and finally exits from the air-cooled outlet, which is equipped with an air-cooled outlet valve.

[0013] Preferably, the liquid cooling medium supply assembly includes: a liquid cooling medium storage container, a power pump, and a flow regulating main valve;

[0014] The liquid cooling medium storage container provides liquid cooling medium to the power pump. The first liquid cooling outlet valve and the second liquid cooling outlet valve are both connected to the liquid cooling medium storage container through heat exchange pipelines. The heat exchange pipelines are equipped with heat exchangers to cool the liquid cooling medium and then recover it into the liquid cooling medium storage container.

[0015] The power pump is connected to the liquid cooling medium flow regulating valve through the main flow regulating valve.

[0016] Preferably, the liquid cooling medium flow regulating valve includes: a rotating cylinder and a baffle;

[0017] The baffle is installed inside the rotating cylinder and is a semi-circular baffle that covers half of the cross-section of the rotating cylinder; the rotating cylinder is connected to the liquid cooling inlet by a sealed bearing and a rotating dynamic seal, the baffle is perpendicularly attached to the heat insulation plate, and the rotating cylinder is driven to rotate by a bearing motor.

[0018] Preferably, the high power density battery module includes multiple high power density single cells arranged in multiple rows and columns. Adjacent rows of high power density single cells are separated by a first cooling plate. Each first cooling plate has multiple parallel straight liquid cooling medium channels. The liquid cooling medium channels in the upper 2 / 3 area of ​​the first cooling plate are densely arranged, while the liquid cooling medium channels in the lower 1 / 3 area of ​​the first cooling plate are sparsely arranged.

[0019] Preferably, the high-energy-density battery module includes multiple high-energy-density single cells arranged in multiple rows and columns. Adjacent rows of high-energy-density single cells are separated by a second cooling plate. Each second cooling plate has a straight cooling channel, which is a shared heat exchange channel for air cooling and liquid cooling.

[0020] Preferably, the heat dissipation system further includes: a first temperature sensor, a second temperature sensor, a current sensor, and a controller;

[0021] The first temperature sensor is installed in the high-power-density battery module to monitor the temperature T1 of the high-power-density battery module in real time; the current sensor is installed on the bus of the high-power-density battery module to monitor the current value I of the bus of the high-power-density battery module; the second temperature sensor is installed in the high-energy-density battery module to monitor the temperature T2 of the high-energy-density battery module in real time; the controller is electrically connected to the first temperature sensor, the second temperature sensor, the liquid cooling medium flow regulating valve, the flow regulating main valve, the air-cooled inlet valve, the first liquid cooling outlet valve, the second liquid cooling outlet valve, and the air-cooled outlet valve, respectively.

[0022] A heat dissipation method for a high-power and high-energy-density battery, the heat dissipation method comprising:

[0023] The temperature T1 of the high power density battery module is monitored in real time by the first temperature sensor, the current value I of the bus of the high power density battery module is monitored in real time by the current sensor, and the temperature T2 of the high energy density battery module is monitored in real time by the second temperature sensor.

[0024] When the high-energy-density battery module operates alone, air cooling is used first. The controller controls the opening of the air-cooling inlet valve and the air-cooling outlet valve, and adjusts the fan power according to T2. The fan power is linearly positively correlated with T2. If T2 continues to rise and exceeds the threshold, liquid cooling is switched. The controller controls the air-cooling inlet valve and the air-cooling outlet valve to close, the second liquid-cooling outlet valve to open, the liquid-cooling medium flow regulating valve to be adjusted to only communicate with the second manifold, and the opening degree of the flow regulating main valve is adjusted according to T2. The opening degree of the flow regulating main valve is linearly positively correlated with T2.

[0025] When high-power-density battery modules and high-energy-density battery modules operate simultaneously, the controller opens the first and second liquid-cooled outlet valves, opens the main flow regulating valve to its maximum, and controls the rotation angle of the baffle of the liquid-cooled medium flow regulating valve through the following formula. :

[0026] ;

[0027] ;

[0028] ;

[0029] ;

[0030] in, This represents the real-time heat dissipation requirements of high-power-density battery modules.

[0031] This represents the real-time heat dissipation requirements of high-energy-density battery modules.

[0032] Real-time discharge rate for high power density battery modules;

[0033] The temperature of high power density battery modules;

[0034] The preset target operating temperature for high power density battery modules;

[0035] The temperature of high energy density battery modules;

[0036] The preset target operating temperature for high energy density battery modules;

[0037] , , For calibration correction factors;

[0038] This refers to the current value of the busbar of a high-power-density battery module.

[0039] This refers to the rated capacity of a high power density battery module.

[0040] (III) Beneficial Effects

[0041] This invention provides a high-power and high-energy-density battery composite heat dissipation system. Compared with the prior art, it has the following advantages:

[0042] In this invention, the first cooling plate used in the high-power battery area employs a non-uniform flow channel with a denser upper section and a sparser lower section to precisely match the non-uniform heat generation of the battery cells, effectively reducing the temperature difference between the upper and lower parts of the battery and preventing localized overheating. The second cooling plate used in the high-energy battery area utilizes a shared cooling channel for both air cooling and liquid cooling, resulting in a compact structure and high space utilization. The air cooling mode meets the energy-saving operation under low load, while the liquid cooling mode provides powerful heat dissipation with rapid switching and minimal temperature control lag. The cooling channel has no internal partitions, resulting in low flow resistance and uniform heat exchange, avoiding the drawbacks of traditional independent flow channels, such as large volume and slow switching. A semi-circular baffle-type flow regulating valve, combined with an intelligent control algorithm, enables stepless distribution of coolant between the two areas, balancing power performance and battery life. The overall heat dissipation system takes into account both the instantaneous heat dissipation requirements of high power and the long-term uniform temperature requirements of high energy, improving the safety and reliability of the battery system. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a flow diagram of the liquid cooling medium used for cooling high power density battery modules in Embodiment 1 of the present invention.

[0045] Figure 2 This is a flow diagram of the liquid cooling medium used for cooling high-energy-density battery modules in Embodiment 1 of the present invention.

[0046] Figure 3 This is a flow diagram of the air-cooling medium used for cooling high-energy-density battery modules in Embodiment 1 of the present invention.

[0047] Figure 4 This is a schematic diagram of the liquid cooling medium flow regulating valve in Embodiment 1 of the present invention.

[0048] Figure 5 This is a schematic diagram of the structure of the first cooling plate in Embodiment 1 of the present invention.

[0049] Figure 6 This is a schematic diagram of the structure of the second cooling plate in Embodiment 1 of the present invention.

[0050] Figure 7 This is a temperature visualization diagram of the high power density battery module in operation according to Embodiment 1 of the present invention.

[0051] Figure 8 This is a schematic diagram of the structure of the first cooling plate in Embodiment 2 of the present invention.

[0052] Figure 9 This is a temperature visualization diagram of the high power density battery module in operation according to Embodiment 2 of the present invention. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] This application provides a high-power and high-energy-density battery composite heat dissipation system, which solves the problems of insufficient heat dissipation of high-power batteries and poor temperature uniformity of high-energy batteries in new energy commercial vehicles.

[0055] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0056] Example 1:

[0057] like Figures 1-6 As shown, the present invention provides a high-power and high-energy-density battery composite heat dissipation system, the heat dissipation system comprising: a first current collector wall 10, a second current collector wall 20, a third current collector wall 30, a first cooling plate 40, and a second cooling plate 50;

[0058] The first flow collecting wall 10, the second flow collecting wall 20 and the third flow collecting wall 30 are arranged in parallel, and the first cooling plate 40 and the second cooling plate 50 are arranged perpendicular to the first flow collecting wall 10; the first flow collecting wall 10 and the second flow collecting wall 20 are connected by multiple sets of first cooling plates 40, and the first flow collecting wall 10 and the third flow collecting wall 30 are connected by multiple sets of second cooling plates 50.

[0059] The adjacent first cooling plates 40 are used to arrange high power density battery modules 01, and the adjacent second cooling plates 50 are used to arrange high energy density battery modules 02.

[0060] The first collecting wall 10 has a first collecting cavity 11 and a second collecting cavity 12, which are separated by a heat insulation plate 13; the second collecting wall 20 has a third collecting cavity 21; the third collecting wall 30 has a fourth collecting cavity 31; the first cooling plate 40 has multiple liquid cooling medium channels 41 along its length, which are arranged in a non-uniform pattern with denser channels at the top and sparser channels at the bottom; the second cooling plate 50 has a cooling channel 51 along its length; the first collecting cavity 11 and the third collecting cavity 21 are connected by the liquid cooling medium channels 41; the second collecting cavity 12 and the fourth collecting cavity 31 are connected by the cooling channel 51.

[0061] The first manifold 10 is provided with a liquid-cooled inlet and an air-cooled inlet; the liquid-cooled inlet is connected to the first manifold 11 and the second manifold 12, and the air-cooled inlet is connected to the second manifold 12; the liquid-cooled inlet is connected to the liquid-cooled medium supply assembly through a liquid-cooled medium flow regulating valve 14, which is used to regulate the flow distribution ratio of the liquid-cooled medium to the first manifold 11 and the second manifold 12; the air-cooled inlet is connected to the fan through an air-cooled inlet valve;

[0062] The second manifold wall 20 is provided with a first liquid-cooled outlet. The liquid-cooled medium entering the first manifold cavity 11 enters the third manifold cavity 12 through the liquid-cooled medium flow channel 41 and finally flows out from the first liquid-cooled outlet. The first liquid-cooled outlet is provided with a first liquid-cooled outlet valve. The third manifold wall 30 has a second liquid-cooled outlet and an air-cooled outlet. In liquid-cooling mode, the liquid-cooled medium entering the second manifold cavity 12 enters the fourth manifold cavity 31 through the cooling channel 51 and finally flows out from the second liquid-cooled outlet. The second liquid-cooled outlet is provided with a second liquid-cooled outlet valve. In air-cooling mode, the air-cooled medium entering the second manifold cavity 12 enters the fourth manifold cavity 31 through the cooling channel 51 and finally exits from the air-cooled outlet. The air-cooled outlet is provided with an air-cooled outlet valve.

[0063] The liquid cooling medium supply assembly includes: a liquid cooling medium storage container, a power pump, and a flow regulating main valve;

[0064] The liquid cooling medium storage container provides liquid cooling medium to the power pump. The first liquid cooling outlet valve and the second liquid cooling outlet valve are both connected to the liquid cooling medium storage container through heat exchange pipelines. The heat exchange pipelines are equipped with heat exchangers to cool the liquid cooling medium and then recover it into the liquid cooling medium storage container.

[0065] The power pump is connected to the liquid cooling medium flow regulating valve 14 via the main flow regulating valve.

[0066] like Figure 4 As shown, the liquid cooling medium flow regulating valve 14 includes: a rotating cylinder 15 and a baffle 16;

[0067] The baffle 16 is installed inside the rotating cylinder 15 and is a semi-circular baffle that blocks half of the cross-section of the rotating cylinder 15. The rotating cylinder 15 is connected to the liquid cooling inlet through a sealed bearing 17 and a rotating dynamic seal. The baffle 16 is perpendicularly attached to the heat insulation plate 13. The rotating cylinder 15 is driven to rotate by a bearing motor to achieve stepless control of the liquid cooling medium flow distribution ratio.

[0068] like Figures 1-3 As shown, the high power density battery module 01 includes 28 high power density single cells arranged in 14 rows and 2 columns. Adjacent rows of high power density single cells are separated by a first cooling plate 40. Each first cooling plate 40 has 11 parallel straight liquid cooling medium channels 41. The cross-section of the liquid cooling medium channels 41 is rectangular, with a height of 5mm and a width of 1.2mm. The liquid cooling medium channels 41 in the upper 2 / 3 area of ​​the first cooling plate 40 are densely arranged, while the liquid cooling medium channels 41 in the lower 1 / 3 area of ​​the first cooling plate 40 are sparsely arranged.

[0069] like Figures 1-3 As shown, the high-energy-density battery module 02 includes 56 high-energy-density single cells arranged in 14 rows and 4 columns. Adjacent rows of high-energy-density single cells are separated by a second cooling plate 50. Each second cooling plate 50 has a straight cooling channel 51. The cross-section of the cooling channel 51 is rectangular, with a height of 108 mm and a width of 1.2 mm. The cooling channel 51 is a shared heat exchange channel for air cooling and liquid cooling. When the battery is discharged at a low rate and the temperature is low, the system uses forced air cooling. When the discharge rate or temperature rises to exceed the threshold, it automatically switches to liquid cooling. The inlets and outlets of air cooling and liquid cooling are different, but the heat exchange medium flows through the same cavity.

[0070] The heat dissipation system also includes: a first temperature sensor, a second temperature sensor, a current sensor, and a controller;

[0071] The first temperature sensor is installed in the high power density battery module 01 to monitor the temperature T1 of the high power density battery module 01 in real time; the current sensor is installed on the bus of the high power density battery module 01 to monitor the current value I of the bus of the high power density battery module 01; the second temperature sensor is installed in the high energy density battery module 02 to monitor the temperature T2 of the high energy density battery module 02 in real time; the controller is electrically connected to the first temperature sensor, the second temperature sensor, the liquid cooling medium flow regulating valve 14, the flow regulating main valve, the air cooling inlet valve, the first liquid cooling outlet valve, the second liquid cooling outlet valve, and the air cooling outlet valve, respectively.

[0072] This invention provides a heat dissipation method for a high-power and high-energy-density battery, the heat dissipation method comprising:

[0073] The temperature T1 of the high power density battery module 01 is monitored in real time by the first temperature sensor, the current value I of the bus of the high power density battery module 01 is monitored in real time by the current sensor, and the temperature T2 of the high energy density battery module 02 is monitored in real time by the second temperature sensor.

[0074] When the high-energy-density battery module 02 operates alone, air cooling is used first. The controller controls the opening of the air-cooling inlet valve and the air-cooling outlet valve, and adjusts the fan power according to T2. The fan power is linearly positively correlated with T2. If T2 continues to rise and exceeds the threshold, it switches to liquid cooling. The controller controls the air-cooling inlet valve and the air-cooling outlet valve to close, the second liquid cooling outlet valve to open, the liquid cooling medium flow regulating valve 14 to be adjusted to only connect with the second manifold 12, and the opening degree of the flow regulating main valve is adjusted according to T2. The opening degree of the flow regulating main valve is linearly positively correlated with T2.

[0075] When high-power-density battery module 01 and high-energy-density battery module 02 are working simultaneously, the controller controls the opening of the first liquid-cooled outlet valve and the second liquid-cooled outlet valve, and the main flow regulating valve to open to the maximum. It also controls the rotation angle of the baffle 16 of the liquid-cooled medium flow regulating valve 14 using the following formula. :

[0076] ;

[0077] ;

[0078] ;

[0079] ;

[0080] in, This represents the real-time heat dissipation requirements of the high-power-density battery module 01.

[0081] This represents the real-time heat dissipation requirements of the high-energy-density battery module 02.

[0082] The real-time discharge rate of high power density battery module 01;

[0083] The temperature of the high power density battery module 01;

[0084] The preset target operating temperature for the high power density battery module 01;

[0085] The temperature of the high-energy-density battery module 02;

[0086] The preset target operating temperature for the high energy density battery module 02;

[0087] , , For calibration correction factors;

[0088] This refers to the current value of the 01 busbar of the high power density battery module.

[0089] The rated capacity of high power density battery module 01;

[0090] When the liquid cooling medium flow regulating valve 14 is only connected to the second manifold 12 ;

[0091] The function of opening the main flow control valve to its maximum is to ensure that there is a sufficient amount of liquid cooling medium flowing through the liquid cooling medium flow control valve 14, keeping the liquid cooling medium flow control valve 14 full of liquid cooling medium, and ensuring that the flow distribution ratio of the liquid cooling medium is accurate.

[0092] Example 2:

[0093] like Figure 7 As shown, based on Example 1, when the high power density battery module 01 is working, it takes... The inlet velocity of the liquid cooling medium entering the first collector cavity 11 from the liquid cooling inlet is 0.5 m / s, the static pressure at the first liquid cooling outlet is 0 Pa, and the outlet velocity is 0.6 m / s. The velocity consistency of all flow channels is high, with no local high-speed impact or low-speed stagnation zone, and the flow distribution is balanced. Except for the electrode post, the highest temperature of the high power density battery module 01 is 26.2℃, the lowest temperature is 24.2℃, and the maximum temperature difference is about 2℃.

[0094] Example 3:

[0095] like Figure 8 , Figure 9 As shown, the difference from Embodiment 2 is that the liquid cooling medium channels 41 opened on the first cooling plate 40 are evenly arranged in space. Excluding the electrode posts, the highest temperature of the high power density battery module 01 is 27.2°C, the lowest temperature is 23.3°C, and the maximum temperature difference is about 4°C.

[0096] It can be seen that the first cooling plate 40, which adopts a dense arrangement of liquid cooling medium channels 41 in the upper 2 / 3 area and a sparse arrangement of liquid cooling medium channels 41 in the lower 1 / 3 area, can more accurately match the non-uniform heat generation of the battery cell, has stronger heat dissipation, effectively reduces the temperature difference between the upper and lower parts of the battery cell, and greatly improves temperature uniformity.

[0097] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0098] 1. In this embodiment of the invention, the first cooling plate used in the high-power battery area uses a non-uniform flow channel with a dense upper section and a sparse lower section to accurately match the non-uniform heat generation of the battery cell, effectively reducing the temperature difference between the upper and lower parts of the battery and preventing local overheating.

[0099] 2. In this embodiment of the invention, the second cooling plate used in the high-energy battery area has a compact structure and high space utilization through a cooling channel that integrates air cooling and liquid cooling. The air cooling mode meets the requirements of low-load energy-saving operation, while the liquid cooling mode provides strong heat dissipation, with rapid switching and small temperature control lag.

[0100] 3. In this embodiment of the invention, the cooling channel has no internal partitions, resulting in low flow resistance and uniform heat exchange, thus avoiding the drawbacks of traditional independent flow channels, such as large volume and slow switching.

[0101] 4. In this embodiment of the invention, the semi-circular baffle-type flow regulating valve, in conjunction with an intelligent control algorithm, enables stepless distribution of coolant between the two zones as needed, balancing power performance and battery life.

[0102] 5. In this embodiment of the invention, the heat dissipation system as a whole takes into account both the instantaneous heat dissipation requirements of high power and the long-term uniform temperature requirements of high energy, thereby improving the safety and reliability of the battery system.

[0103] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0104] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-power and high-energy-density battery composite heat dissipation system, characterized in that, The heat dissipation system includes: a first collector wall (10), a second collector wall (20), a third collector wall (30), a first cooling plate (40), and a second cooling plate (50); The first flow collecting wall (10), the second flow collecting wall (20) and the third flow collecting wall (30) are arranged in parallel, and the first cooling plate (40) and the second cooling plate (50) are arranged perpendicular to the first flow collecting wall (10); the first flow collecting wall (10) and the second flow collecting wall (20) are connected by multiple sets of first cooling plates (40), and the first flow collecting wall (10) and the third flow collecting wall (30) are connected by multiple sets of second cooling plates (50); High power density battery modules (01) are arranged between adjacent first cooling plates (40), and high energy density battery modules (02) are arranged between adjacent second cooling plates (50). The first collecting wall (10) has a first collecting cavity (11) and a second collecting cavity (12) inside, and the first collecting cavity (11) and the second collecting cavity (12) are separated by a heat insulation plate (13); the second collecting wall (20) has a third collecting cavity (21) inside; the third collecting wall (30) has a fourth collecting cavity (31) inside; the first cooling plate (40) has multiple liquid cooling medium channels (41) along its length, and the spatial arrangement of the liquid cooling medium channels (41) is a non-uniform arrangement with denser upper sections and sparser lower sections; the second cooling plate (50) has a cooling channel (51) along its length; the first collecting cavity (11) and the third collecting cavity (21) are connected through the liquid cooling medium channels (41); the second collecting cavity (12) and the fourth collecting cavity (31) are connected through the cooling channel (51); The first manifold wall (10) is provided with a liquid cooling inlet and an air cooling inlet; the liquid cooling inlet is connected to the first manifold cavity (11) and the second manifold cavity (12), and the air cooling inlet is connected to the second manifold cavity (12); the liquid cooling inlet is connected to the liquid cooling medium supply assembly through a liquid cooling medium flow regulating valve (14), which is used to regulate the flow distribution ratio of the liquid cooling medium to the first manifold cavity (11) and the second manifold cavity (12); the air cooling inlet is connected to the fan through an air cooling inlet valve; The second manifold wall (20) is provided with a first liquid cooling outlet. The liquid cooling medium entering the first manifold cavity (11) enters the third manifold cavity (12) through the liquid cooling medium flow channel (41) and finally flows out from the first liquid cooling outlet. The first liquid cooling outlet is provided with a first liquid cooling outlet valve. The third manifold wall (30) is provided with a second liquid cooling outlet and an air cooling outlet. In liquid cooling mode, the liquid cooling medium entering the second manifold cavity (12) enters the fourth manifold cavity (31) through the cooling channel (51) and finally flows out from the second liquid cooling outlet. The second liquid cooling outlet is provided with a second liquid cooling outlet valve. In air cooling mode, the air cooling medium entering the second manifold cavity (12) enters the fourth manifold cavity (31) through the cooling channel (51) and finally discharges from the air cooling outlet. The air cooling outlet is provided with an air cooling outlet valve.

2. The high-power and high-energy-density battery composite heat dissipation system as described in claim 1, characterized in that, The liquid cooling medium supply assembly includes: a liquid cooling medium storage container, a power pump, and a flow regulating main valve; The liquid cooling medium storage container provides liquid cooling medium to the power pump. The first liquid cooling outlet valve and the second liquid cooling outlet valve are both connected to the liquid cooling medium storage container through heat exchange pipelines. The heat exchange pipelines are equipped with heat exchangers to cool the liquid cooling medium and then recover it into the liquid cooling medium storage container. The power pump is connected to the liquid cooling medium flow regulating valve (14) through the flow regulating main valve.

3. The high-power and high-energy-density battery composite heat dissipation system as described in claim 1, characterized in that, The liquid cooling medium flow regulating valve (14) includes: a rotating cylinder (15) and a baffle (16). The baffle (16) is set inside the rotating cylinder (15) and is a semi-circular baffle that blocks half of the cross section of the rotating cylinder (15); the rotating cylinder (15) is connected to the liquid cooling inlet through a sealed bearing (17) with a rotating dynamic seal, the baffle (16) is perpendicularly attached to the heat insulation plate (13), and the rotating cylinder (15) is driven to rotate by a bearing motor.

4. The high-power and high-energy-density battery composite heat dissipation system as described in claim 1, characterized in that, The high power density battery module (01) includes multiple high power density single cells arranged in multiple rows and columns. Adjacent rows of high power density single cells are separated by a first cooling plate (40). Each first cooling plate (40) has multiple parallel straight liquid cooling medium channels (41). The liquid cooling medium channels (41) in the upper 2 / 3 area of ​​the first cooling plate (40) are densely arranged, while the liquid cooling medium channels (41) in the lower 1 / 3 area of ​​the first cooling plate (40) are sparsely arranged.

5. The high-power and high-energy-density battery composite heat dissipation system as described in claim 1, characterized in that, The high energy density battery module (02) includes multiple high energy density single cells arranged in multiple rows and columns. Adjacent rows of high energy density single cells are separated by a second cooling plate (50). Each second cooling plate (50) has a straight cooling channel (51) which is a shared heat exchange channel for air cooling and liquid cooling.

6. The high-power and high-energy-density battery composite heat dissipation system as described in claim 1, characterized in that, The heat dissipation system also includes: a first temperature sensor, a second temperature sensor, a current sensor, and a controller; The first temperature sensor is installed in the high power density battery module (01) to monitor the temperature T1 of the high power density battery module (01) in real time; the current sensor is installed on the bus of the high power density battery module (01) to monitor the current value I of the bus of the high power density battery module (01); the second temperature sensor is installed in the high energy density battery module (02) to monitor the temperature T2 of the high energy density battery module (02) in real time; the controller is electrically connected to the first temperature sensor, the second temperature sensor, the liquid cooling medium flow regulating valve (14), the flow regulating main valve, the air cooling inlet valve, the first liquid cooling outlet valve, the second liquid cooling outlet valve and the air cooling outlet valve respectively.

7. A method for heat dissipation of a high-power and high-energy-density battery, characterized in that, The heat dissipation method includes: The temperature T1 of the high power density battery module (01) is monitored in real time by the first temperature sensor, the current value I of the bus of the high power density battery module (01) is monitored in real time by the current sensor, and the temperature T2 of the high energy density battery module (02) is monitored in real time by the second temperature sensor. When the high-energy-density battery module (02) works alone, air cooling is used first. The controller controls the opening of the air cooling inlet valve and the air cooling outlet valve, and adjusts the fan power according to T2. The fan power is linearly positively correlated with T2. If T2 continues to rise and exceeds the threshold, it switches to liquid cooling. The controller controls the air cooling inlet valve and the air cooling outlet valve to close, the second liquid cooling outlet valve to open, the liquid cooling medium flow regulating valve (14) to be adjusted to only be connected to the second collection chamber (12), and the opening degree of the flow regulating main valve is adjusted according to T2. The opening degree of the flow regulating main valve is linearly positively correlated with T2. When the high power density battery module (01) and the high energy density battery module (02) are working simultaneously, the controller controls the first liquid cooling outlet valve and the second liquid cooling outlet valve to open, the flow regulating main valve to open to the maximum, and controls the rotation angle of the baffle (16) of the liquid cooling medium flow regulating valve (14) through the following formula. : ; ; ; ; in, The real-time heat dissipation requirement value for the high power density battery module (01); The real-time heat dissipation requirement value for the high energy density battery module (02); The real-time discharge rate of the high power density battery module (01); The temperature of the high power density battery module (01); The preset target operating temperature for the high power density battery module (01); The temperature of the high energy density battery module (02); The preset target operating temperature for the high energy density battery module (02); , , For calibration correction factors; The current value of the busbar of the high power density battery module (01); The rated capacity of the high power density battery module (01).

Images