Precise heat dissipation and heat management control system for charging cabinet of battery swap station

Abstract

The invention belongs to the technical field of control cabinets, and particularly relates to an accurate heat dissipation and heat management control system for a charging cabinet of a battery swap station. Comprising the following steps: starting up a heat management unit of a battery swap station, accessing a charging pack / charging requirements, opening a charging cabinet waterway self-circulation two-way valve, enabling the charging cabinet waterway self-circulation two-way valve to be free of faults, opening and feeding back the charging cabinet waterway self-circulation two-way valve, opening a charging cabinet waterway self-circulation water pump, enabling the charging cabinet waterway self-circulation water pump to be free of faults, and starting the number of chargers. Charging of the charging cabinet, the temperature of a charging cabinet power module, the output power of the charging cabinet, a charging cabinet fan, the highest temperature of the charging cabinet module, on / off / adjustment of a waterway radiator fan, the water temperature of the radiator-the water temperature of the charging cabinet and the heat dissipation requirements of other modules are met. According to the accurate heat dissipation and heat management control system for the charging cabinet of the battery swap station, in heat management of the charging cabinet, the relative air volume requirement is determined according to various parameters through air cooling calculation, and therefore accurate heat dissipation control is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of control cabinets, and in particular to a precise heat dissipation and thermal management control system for a charging cabinet in a battery swap station. Background Art

[0002] The existing air-cooled water-cooled air conditioner cannot accurately control the air volume according to the power, temperature and other parameters of the charging cabinet in the air-cooling and heat management of the charging cabinet, which affects the cooling effect and equipment life of the charging cabinet. The cooling method of the cooling fan and the air guide plate is single, and the fan starts up. It takes time, and the output power of the charging cabinet is large at the moment of startup, which can easily reach a dangerous value.

[0003] Disadvantages of existing battery swap station charging cabinets:

[0004] 1. It is impossible to accurately control the temperature by only relying on the set temperature threshold to decide whether to turn on or off the heat dissipation device. When the temperature inside the charging cabinet approaches the threshold, the heat dissipation device may be started and stopped frequently, resulting in large temperature fluctuations, which will affect the stability and life of the charging device.

[0005] 2. When using a liquid cooling system for thermal management of the charging cabinet, it is necessary to regularly check the coolant level, quality and operating status of the circulation system, and replenish or replace the coolant in a timely manner. This places high professional requirements on maintenance personnel, the maintenance workload is large, and improper maintenance may affect the system's heat dissipation effect and service life.

[0006] 3. Fixed temperature thresholds may not be applicable to different charging scenarios, battery types, and environmental conditions. For example, in a cold environment, the heat dissipation requirements of the charging cabinet are low, while in a hot environment or when charging at high power, the heat dissipation requirements are greatly increased. A single threshold cannot meet diverse heat dissipation requirements. Summary of the invention

[0007] In order to overcome the above-mentioned defects of the prior art, the inventors conducted in-depth research and completed the present invention after paying a lot of creative work.

[0008] Specifically, the technical problem to be solved by the present invention is to provide a precise heat dissipation and thermal management control system for a charging cabinet in a battery swap station, so as to solve the technical problems of low temperature control accuracy of the current control cabinet, high maintenance of the liquid cooling system, and poor applicability of the control cabinet.

[0009] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0010] A precise heat dissipation and thermal management control system for charging cabinets in a battery swap station, including the start-up of a thermal management unit in the battery swap station, charging pack access / charging requirements, opening of a charging cabinet water circuit self-circulation two-way valve, no fault in the charging cabinet water circuit self-circulation two-way valve, opening feedback of the charging cabinet water circuit self-circulation two-way valve, opening of the charging cabinet water circuit self-circulation water pump, no fault in the charging cabinet water circuit self-circulation water pump, number of chargers turned on, charging cabinet charging, charging cabinet power module temperature, charging cabinet output power, charging cabinet fan, charging cabinet module maximum temperature, water circuit radiator fan on / off / adjustment, radiator water temperature-charging cabinet water temperature and other module heat dissipation requirements.

[0011] As an improved technical solution, the output end of the thermal management unit of the battery swap station is data connected to the input end of the charging pack access / charging demand, the output end of the charging pack access / charging demand is data connected to the input end of the charging cabinet water circuit self-circulation two-way valve opening, and the fault-free output end of the charging cabinet water circuit self-circulation two-way valve is data connected to the input end of the charging cabinet water circuit self-circulation two-way valve opening.

[0012] As an improved technical solution, the output end of the charging cabinet water circuit self-circulation two-way valve is data connected to the input end of the charging cabinet water circuit self-circulation two-way valve opening feedback, the output end of the charging cabinet water circuit self-circulation two-way valve opening feedback is data connected to the input end of the charging cabinet water circuit self-circulation water pump opening, and the output end of the charging cabinet water circuit self-circulation water pump opening is data connected to the charging input end of the charging cabinet.

[0013] As an improved technical solution, the fault-free output end of the charging cabinet water circuit self-circulating water pump is data-connected to the input end of the charging cabinet water circuit self-circulating water pump start-up, the output end of the charger start-up number is data-connected to the input end of the charging cabinet water circuit self-circulating water pump start-up, and the charging output end of the charging cabinet is data-connected to the input end of the radiator water temperature-charging cabinet water temperature.

[0014] As an improved technical solution, the charging output end of the charging cabinet is data connected to the input end of the charging cabinet power module temperature, the charging output end of the charging cabinet is data connected to the input end of the charging cabinet output power, and the output ends of the charging cabinet output power and the charging cabinet power module temperature are partially data connected to the input end of the charging cabinet fan.

[0015] As an improved technical solution, the output end of the charging cabinet power module temperature is connected to the input end data of the charging cabinet module maximum temperature, and the output end of the charging cabinet module maximum temperature is connected to the input end data of the water radiator fan on / off / adjustment.

[0016] As an improved technical solution, the output end of the radiator water temperature-charging cabinet water temperature is connected to the input end data of the water circuit radiator fan on / off / adjustment, and the output end of the other module heat dissipation requirements is connected to the input end data of the water circuit radiator fan on / off / adjustment.

[0017] After adopting the above technical solution, the beneficial effects of the present invention are:

[0018] 1. The present invention uses the number of chargers turned on and the charging of the charging cabinet in conjunction with the temperature of the power module of the charging cabinet and the output power of the charging cabinet, and the temperature of the power module of the charging cabinet and the output power of the charging cabinet in conjunction with the fan of the charging cabinet, so that the control parameters of this solution can be dynamically adjusted for different charging scenarios, battery types and environmental conditions. Whether it is a low heat dissipation demand in a cold environment or a high heat dissipation demand in a hot environment or high-power charging, it can be met by flexibly changing the working state of the electronic two-way valve of the water channel radiator ventilation and the water channel self-circulation, overcoming the defect of poor adaptability of traditional fixed threshold control.

[0019] 2. The present invention uses the startup of the thermal management unit of the battery swap station and the charging pack access / charging demand with the opening of the charging cabinet water self-circulation two-way valve and the trouble-free use of the charging cabinet water self-circulation two-way valve, the opening of the charging cabinet water self-circulation two-way valve and the feedback of the charging cabinet water self-circulation two-way valve opening and the opening of the charging cabinet water self-circulation two-way valve and the opening of the charging cabinet water self-circulation pump and the trouble-free use of the charging cabinet water self-circulation pump, so as to achieve the charging cabinet with air cooling and water self-circulation thermal management. Due to the large output power of the charging cabinet, if it only relies on air cooling to dissipate heat, its fan will be in a state of constant working, its energy consumption is high, and the service life of the fan will also be shortened. The present invention adopts the thermal management strategy of air cooling plus water self-circulation, which has good control effect and lower cost than the liquid cooling system. In order to solve the problem of the large output power of the charging cabinet at the moment of startup, when the fan is still in the startup stage, the water self-circulation system will first take away the heat, and then the air volume control and water consultation and control will be carried out according to the actual charging cabinet working conditions and other factors in the later stage.

[0020] 3. The present invention uses the power module temperature of the charging cabinet and the maximum temperature of the charging cabinet module in coordination with the opening / closing / adjustment of the water circuit radiator fan and the heat dissipation requirements of other modules, and the water temperature of the charging box radiator of the charging cabinet - the water temperature of the charging cabinet is used in coordination with the opening / closing / adjustment amount of the water circuit radiator fan, so as to achieve the purpose of adding consideration of factors such as ambient temperature, output power, and PFC module temperature of the charging cabinet into the control logic model, and establishing corresponding compensation mechanisms and adaptive control strategies. The thermal management system can automatically adjust operating parameters according to changes in environmental conditions to ensure good performance under harsh environmental conditions. At the same time, the system logic couples the control results according to all different parameters, so that the thermal management mechanism of the charging cabinet can meet all external environments and different charging cabinet states. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 This is a schematic diagram of the thermal management control system structure of the precise heat dissipation and thermal management control system of the battery swap station charging cabinet of the present invention.

[0023] Figure 2 This is a schematic diagram of the relative air volume calculation of the output power of the charging cabinet of the battery swap station charging cabinet precise heat dissipation and thermal management control system of the present invention.

[0024] Figure 3 Schematic diagram of relative air volume calculation of the ambient temperature of the charging cabinet of the battery swap station charging cabinet precise heat dissipation and thermal management control system of the present invention.

[0025] Figure 4 This is a schematic diagram of the number of chargers turned on and the relative water pump flow requirements of the precise heat dissipation and thermal management control system of the battery swap station charging cabinet of the present invention.

[0026] Figure 5 This is a schematic diagram of the relative air volume requirement of the outlet water temperature-total target battery water temperature difference of the precise heat dissipation and thermal management control system of the battery swap station charging cabinet of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0030] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] like Figure 1 and Figure 5 Commonly shown:

[0032] Example 1

[0033] The present embodiment provides a precise heat dissipation and thermal management control system for charging cabinets in a battery swap station, which includes starting up the thermal management unit of the battery swap station, charging pack access / charging requirements, opening of the charging cabinet water circuit self-circulation two-way valve, no fault in the charging cabinet water circuit self-circulation two-way valve, opening feedback of the charging cabinet water circuit self-circulation two-way valve, opening of the charging cabinet water circuit self-circulation water pump, no fault in the charging cabinet water circuit self-circulation water pump, number of chargers turned on, charging cabinet charging, charging cabinet power module temperature, charging cabinet output power, charging cabinet fan, maximum charging cabinet module temperature, water circuit radiator fan on / off / adjustment, radiator water temperature - charging cabinet water temperature and other module heat dissipation requirements.

[0034] The output end of the thermal management unit of the battery swap station is data-connected to the input end of the charging pack access / charging demand, the output end of the charging pack access / charging demand is data-connected to the input end of the charging cabinet water circuit self-circulation two-way valve opening, and the fault-free output end of the charging cabinet water circuit self-circulation two-way valve is data-connected to the input end of the charging cabinet water circuit self-circulation two-way valve opening.

[0035] The output end of the charging cabinet water circuit self-circulation two-way valve opening feedback is data connected to the input end of the charging cabinet water circuit self-circulation two-way valve opening feedback, the output end of the charging cabinet water circuit self-circulation two-way valve opening feedback is data connected to the input end of the charging cabinet water circuit self-circulation water pump opening, and the output end of the charging cabinet water circuit self-circulation water pump opening is data connected to the charging input end of the charging cabinet.

[0036] In this embodiment, Figure 4The figure shows the flow requirements of the water circuit self-circulation of different charging cabinets according to the number of chargers turned on in the charging cabinet. The speed of the water pump is adjusted according to the flow requirements. When one or more charging packs are connected (or there is a need for charging), the two-way valve of the water circuit self-circulation will be opened first, and then the water pump will be turned on according to the flow requirements after receiving the feedback of the successful opening of the two-way valve. The speed of the water pump will be adjusted in real time according to the different flow requirements of the number of chargers turned on.

[0037] Example 2

[0038] The fault-free output end of the charging cabinet water circuit self-circulating water pump is data-connected to the input end of the charging cabinet water circuit self-circulating water pump start-up, the output end of the charger start-up number is data-connected to the input end of the charging cabinet water circuit self-circulating water pump start-up, and the charging output end of the charging cabinet is data-connected to the input end of the radiator water temperature-charging cabinet water temperature.

[0039] The charging output end of the charging cabinet is data connected to the input end of the charging cabinet power module temperature, the charging output end of the charging cabinet is data connected to the input end of the charging cabinet output power, and the output ends of the charging cabinet output power and the charging cabinet power module temperature are partially data connected to the input end of the charging cabinet fan.

[0040] In this embodiment, in the thermal management of the charging cabinet, the air cooling calculation determines the relative air volume requirement based on multiple parameters to achieve precise heat dissipation control. When the cooling demand of the charging cabinet is no heat dissipation demand, it means that the charging cabinet does not need heat dissipation at this time, and the relative air volume requirement is 0 accordingly. This situation may occur in scenarios where the charging cabinet is in low-power operation or the ambient temperature is low and the heat dissipation pressure is small. When the cooling demand of the charging cabinet is in demand, the calculation of the relative air volume demand is more complicated, and it needs to be considered from two dimensions, and finally the larger value of the two is taken as the total relative air volume demand.

[0041] First, if Figure 2 The relative air volume is calculated based on the output power of the charging cabinet as shown. The total output power is obtained by summing up the power values ​​of all charging cabinets. The total relative air volume requirement is queried by the software based on the total output power combined with the ambient temperature. In order to avoid failure to receive power data due to certain reasons (such as communication failure), in the air cooling calculation model, first determine whether the battery pack in the charger is successfully connected, and then determine the power of the charger. If neither is received, a communication failure will be reported.

[0042] Secondly, if Figure 3As shown, the relative air volume is calculated based on the temperature of the charging cabinet power module. The charging station control end will send the charging cabinet PFC module temperature 1, 2, 3 and the charging cabinet DC module temperature 1, 2, 3. The maximum value Tmax of these six temperature values ​​will be selected in the air cooling calculation model. If a certain temperature data is invalid, the default is -40℃, and this temperature value is the alarm value. The unit will issue a temperature alarm and feedback to the charging station control end. Then query the total relative air volume demand based on the charging cabinet temperature and ambient temperature. This method can promptly respond to changes in heat dissipation requirements caused by the increase in temperature of different power modules.

[0043] Finally, the total relative air volume demand takes the maximum value of the relative air volume demands calculated from the above two different dimensions to ensure that the air volume is sufficient to meet the heat dissipation requirements of the charging cabinet and ensure the stable operation of the equipment in the charging cabinet.

[0044] The air volume under different parameters in the air cooling calculation of the charging cabinet is actually calibrated according to the actual needs in the actual environment. For example, during the R&D stage, the unit will calibrate the heat dissipation requirements and the heat dissipation air volume requirements for the different heat dissipation requirements of the charging cabinet under different ambient temperatures in the experiment. This is to meet the different air volume outputs of the fan under various coupling conditions of the ambient temperature, the DC module temperature of the charging cabinet, and the PFC module temperature of the charging cabinet at -20 to 30 degrees.

[0045] Example 3

[0046] The output end of the charging cabinet power module temperature is data-connected to the input end of the charging cabinet module maximum temperature, and the output end of the charging cabinet module maximum temperature is data-connected to the input end of the water channel radiator fan opening / closing / adjusting.

[0047] The output end of the radiator water temperature-charging cabinet water temperature is connected to the input end data of the water circuit radiator fan on / off / adjustment, and the output end of the other module heat dissipation requirements is connected to the input end data of the water circuit radiator fan on / off / adjustment.

[0048] In this embodiment, the air volume requirement of the self-circulation of the water circuit of the charging cabinet mainly comes from the heat dissipation of the water circuit heat exchange medium. The temperature brought out of the water circuit in the charging cabinet is dissipated by the fan, and the air volume requirement of the self-circulation of the water circuit of the charging cabinet is also determined based on relevant parameters to achieve precise control of the air volume of the water circuit and further optimize the thermal management effect.

[0049] When the charger water circuit self-circulation mode is off, the charging cabinet water circuit self-circulation air volume demand is 0. This is because in this mode, the water circuit is either not running or does not require additional water circuit self-circulation air volume assistance, so the air volume demand is zero.

[0050] When the charger water circuit self-circulation mode is not closed mode, the water circuit self-circulation air volume is related to the outlet water temperature and the total target water temperature of the battery circuit. For example, when the outlet water temperature of the water circuit radiator minus the total target water temperature of the charging cabinet water circuit is -5°C, the relative air volume requirement is 0; when the temperature difference is 25°C, the relative air volume requirement is 100. In this way, by adjusting the air volume according to the water temperature difference, the heat dissipation efficiency of the water circuit can be more accurately controlled to keep the water temperature within the appropriate range, and the auxiliary means of water circuit self-circulation can be quickly used to quickly cool the charging cabinet.

[0051] like Figure 5 As shown in the figure, when other modules of the battery swap station have cooling requirements, the determination of the air volume of the charging cabinet water circuit is more complicated (the main reason is that other modules also use this radiator for water circuit heat dissipation), so it needs to be considered from two aspects. First, the radiator air volume is related to the maximum temperature of all charging cabinet power module groups. For example, when the ambient temperature is -20℃, the air volume is 0 when the maximum temperature of the power module group is low. When the maximum temperature of the power module group rises to a certain extent, such as 80℃, the water circuit air volume increases accordingly. Second, the water circuit air volume is also related to (radiator water outlet temperature). Under different ambient temperatures and temperature difference conditions, the air volume has different values. The total air volume requirement of the charger circuit is the sum of the air volumes obtained from these two aspects according to their respective tables. This dual-factor method of determining the air volume can more comprehensively consider the heat dissipation requirements of the charger under different working conditions and ensure effective heat dissipation in other water circuits and chargers.

[0052] It should be understood that the purpose of these embodiments is only to illustrate the present invention and is not intended to limit the protection scope of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art can make various changes, modifications and / or variations to the present invention, and all of these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A precise heat dissipation and thermal management control system for charging cabinets in a battery swap station, including the start-up of the thermal management unit of the battery swap station, charging pack access / charging requirements, opening of the charging cabinet water circuit self-circulation two-way valve, no fault of the charging cabinet water circuit self-circulation two-way valve, opening feedback of the charging cabinet water circuit self-circulation two-way valve, opening of the charging cabinet water circuit self-circulation water pump, no fault of the charging cabinet water circuit self-circulation water pump, the number of chargers turned on, charging cabinet charging, charging cabinet power module temperature, charging cabinet output power, charging cabinet fan, charging cabinet module maximum temperature, water circuit radiator fan on / off / adjustment, radiator water temperature - charging cabinet water temperature and other module heat dissipation requirements.

2. According to the precise heat dissipation and thermal management control system of the battery swap station charging cabinet of claim 1, it is characterized by: The output end of the thermal management unit of the battery swap station is data-connected to the input end of the charging pack access / charging demand, the output end of the charging pack access / charging demand is data-connected to the input end of the charging cabinet water circuit self-circulation two-way valve opening, and the fault-free output end of the charging cabinet water circuit self-circulation two-way valve is data-connected to the input end of the charging cabinet water circuit self-circulation two-way valve opening.

3. According to the precise heat dissipation and thermal management control system of the battery swap station charging cabinet of claim 1, it is characterized by: The output end of the charging cabinet water circuit self-circulation two-way valve opening feedback is data connected to the input end of the charging cabinet water circuit self-circulation two-way valve opening feedback, the output end of the charging cabinet water circuit self-circulation two-way valve opening feedback is data connected to the input end of the charging cabinet water circuit self-circulation water pump opening, and the output end of the charging cabinet water circuit self-circulation water pump opening is data connected to the charging input end of the charging cabinet.

4. According to claim 1, the precise heat dissipation and thermal management control system for the charging cabinet of the battery swap station is characterized in that: The fault-free output end of the charging cabinet water circuit self-circulating water pump is data-connected to the input end of the charging cabinet water circuit self-circulating water pump start-up, the output end of the charger start-up number is data-connected to the input end of the charging cabinet water circuit self-circulating water pump start-up, and the charging output end of the charging cabinet is data-connected to the input end of the radiator water temperature-charging cabinet water temperature.

5. According to claim 1, the precise heat dissipation and thermal management control system for the charging cabinet of the battery swap station is characterized in that: The charging output end of the charging cabinet is data connected to the input end of the charging cabinet power module temperature, the charging output end of the charging cabinet is data connected to the input end of the charging cabinet output power, and the output ends of the charging cabinet output power and the charging cabinet power module temperature are partially data connected to the input end of the charging cabinet fan.

6. According to claim 1, the precise heat dissipation and thermal management control system for the charging cabinet of the battery swap station is characterized in that: The output end of the charging cabinet power module temperature is data-connected to the input end of the charging cabinet module maximum temperature, and the output end of the charging cabinet module maximum temperature is data-connected to the input end of the water channel radiator fan opening / closing / adjusting.

7. According to claim 1, the precise heat dissipation and thermal management control system for the charging cabinet of the battery swap station is characterized in that: The output end of the radiator water temperature-charging cabinet water temperature is connected to the input end data of the water circuit radiator fan on / off / adjustment, and the output end of the other module heat dissipation requirements is connected to the input end data of the water circuit radiator fan on / off / adjustment.

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