Thermal management charging system and charging temperature control method for battery pack

Abstract

This disclosure provides a thermal management charging system and a charging temperature control method for a battery pack. The method includes acquiring charging condition parameters of the battery pack; performing charging liquid thermal adjustment processing on the charging condition parameters and preset condition parameters to obtain a charging cold and heat adjustment value; and sending a charging cold and heat regulation signal to a liquid thermal controller based on the charging cold and heat adjustment value to adjust the charging liquid filling mode of the battery pack. After acquiring the charging condition parameters, the current charging operating state of the battery pack is determined. Then, the charging condition parameters are compared with the preset condition parameters to determine the degree of difference in the real-time changes in the charging state of the battery pack. Finally, based on the degree of difference, the charging liquid filling mode of the battery pack is adjusted so that the charging state of the battery pack is always maintained in the optimal state, improving charging safety and efficiency under all weather conditions.

Description

Technical Field

[0001] This disclosure relates to the field of battery charging technology, and in particular to a thermal management charging system and a charging temperature control method for battery packs. Background Technology

[0002] With the increasing popularity of two-wheeled electric vehicles, users' demand for charging speed is growing, making fast charging technology a key to industry development. However, batteries generate a large amount of heat during fast charging (such as 2C, 3C, or higher rates). If this heat cannot be dissipated in time, the battery temperature will rise sharply, leading to performance degradation, shortened lifespan, and even safety issues such as thermal runaway. Traditional two-wheeled vehicle battery packs mostly use natural cooling or simple air cooling designs, which have low heat dissipation efficiency and cannot support continuous high-rate fast charging.

[0003] Currently, while there are precedents for applying liquid cooling technology to high-power charging piles for electric vehicles—for example, using fully immersion liquid cooling to dissipate heat from the power components and cables inside the charging pile, or coupling the vehicle's air conditioning thermal management system with the charging pile via a quick-connect interface to achieve thermal management during charging—these solutions primarily serve four-wheeled vehicles. Existing patented charging temperature control methods use fan speed control and two fans to achieve charging pile cooling during charging. This means that existing two-wheeled vehicle charging solutions lack real-time monitoring and feedback of the battery pack, resulting in insufficient intelligence in the charging process and an inability to dynamically adjust thermal management strategies based on the actual battery condition. Safety and efficiency issues are particularly prominent in extreme high and low temperature environments. Even existing patented technologies only offer air cooling, making it difficult to achieve rapid charging and cooling of the battery pack. Summary of the Invention

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a thermal management charging system and charging temperature control method for battery packs that effectively improves charging safety and efficiency under all climate conditions.

[0005] The purpose of this disclosure is achieved through the following technical solution: A thermal management charging system for a battery pack includes: a charging device, a temperature regulating device, and a control module. The charging device has a charging cable and a hot circulating fluid inlet / outlet pipe. The charging cable is electrically connected to the charging terminal of the battery pack, and the hot circulating fluid inlet / outlet pipe is connected to the hot circulating fluid inlet / outlet of the battery pack. The temperature regulating device includes a coolant storage tank, a heating fluid storage tank, and a hot circulating fluid recovery tank. The outlet of the coolant storage tank is connected to the coolant inlet of the charging device, the outlet of the heating fluid storage tank is connected to the heating inlet of the charging device, the inlet of the hot circulating fluid recovery tank is connected to the outlet of the charging device, and the recovery outlet of the hot circulating fluid recovery tank is connected to the inlets of the coolant storage tank and the heating fluid storage tank, respectively. The control module's control terminal is used to control the on / off connection between the coolant storage tank, the heating fluid storage tank, and the hot circulating fluid recovery tank.

[0006] In one embodiment, a coolant storage tank injects low-temperature coolant unidirectionally into the charging device, a heating fluid storage tank injects heated coolant unidirectionally into the charging device, a thermal circulation fluid recovery tank unidirectionally recovers the coolant from the charging device, and the thermal circulation fluid recovery tank returns the recovered coolant to the coolant storage tank and the heating fluid storage tank, respectively.

[0007] In one embodiment, one-way inlet filter valves are respectively installed between the hot circulating fluid recovery tank and the coolant storage tank, and between the hot circulating fluid recovery tank and the heating fluid storage tank.

[0008] In one embodiment, there are multiple charging devices and temperature regulating devices, and multiple coolant storage tanks, multiple heating fluid storage tanks, and multiple hot circulating fluid recovery tanks are connected to each other through bidirectional valves.

[0009] The battery pack is supplied with coolant suitable for charging through coolant and heating fluid storage tanks, which keep the coolant temperature inside the battery pack at a safe level. Moreover, when charging in extreme environments, the coolant and heating fluid storage tanks can quickly replace the coolant, keeping the charging environment of the battery pack stable at all times, thereby improving the charging efficiency of the battery pack and also enhancing the charging safety of the battery pack.

[0010] A charging temperature control method, applied to the thermal management charging system for a battery pack described in any of the above embodiments, the charging temperature control method comprising: Obtain the charging status parameters of the battery pack; The charging operating parameters are compared with the preset operating parameters by the charging liquid thermal adjustment process to obtain the charging cold and heat adjustment value. Based on the difference between charging temperature and heat, a charging temperature and heat regulation signal is sent to the liquid thermal controller to adjust the charging and liquid filling mode of the battery pack.

[0011] In one embodiment, obtaining the charging condition parameters of the battery pack includes: obtaining the charging access temperature of the battery pack.

[0012] In one embodiment, the charging operating condition parameters and preset operating condition parameters are subjected to charging liquid thermal adjustment processing to obtain the charging cold and heat adjustment value, including: calculating the adjustment between the charging access temperature and the preset charging temperature to obtain the charging temperature difference.

[0013] In one embodiment, the preset charging temperature is 0°C to 45°C.

[0014] In one embodiment, a charging cooling and heating control signal is sent to the liquid thermal controller based on the charging cooling and heating difference value to adjust the charging liquid filling mode of the battery pack, including: detecting whether the charging temperature difference matches the preset temperature difference; when the charging temperature difference matches the preset temperature difference, a cooling and heating-free charging signal is sent to the liquid thermal controller to enable the battery pack to start the charging mode.

[0015] In one embodiment, the method detects whether the charging temperature difference matches the preset temperature difference, and then further includes: when the charging temperature difference is greater than the preset temperature difference, sending a charging cold start signal to the liquid thermal controller to cause the coolant storage tank to deliver coolant to the battery pack and start the cooling pre-cooling mode.

[0016] In one embodiment, when the charging temperature difference is less than a preset temperature difference, a charging start signal is sent to the liquid thermal controller to cause the heating liquid storage tank to deliver heated coolant to the battery pack and start the heating preheating mode.

[0017] Compared with the prior art, this disclosure has at least the following advantages: After collecting charging condition parameters, the current charging status of the battery pack is determined. Then, the charging condition parameters are compared with preset condition parameters to determine the degree of difference in the real-time changes in the charging status of the battery pack. Finally, based on the degree of difference, the charging and electrolyte filling mode of the battery pack is adjusted to provide feedback regulation of the charging environment of the battery pack, so that the charging status of the battery pack is always maintained in the optimal state, thereby improving charging safety and efficiency under all weather conditions. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a flowchart of a charging temperature control method in one embodiment; Figure 2 A schematic diagram of a thermal management charging system for a battery pack; Figure 3 This is a flowchart of a charging temperature control method in another embodiment. Detailed Implementation

[0020] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Please see Figure 1 This is a flowchart of a charging temperature control method according to an embodiment of this disclosure. Please refer to it as well. Figure 2The thermal management charging system 2 for battery pack 1 using the above-mentioned charging temperature control method includes: a charging device 201 and a temperature regulating device 3. The charging device 201 has a charging cable 104 and a hot circulating fluid inlet / outlet pipe. The charging cable 104 is used to electrically connect to the charging end of the battery pack 1. The hot circulating fluid inlet / outlet pipe is connected to the hot circulating fluid inlet / outlet of the battery pack 1. The temperature regulating device 3 includes a coolant storage tank 202, a heating fluid storage tank 204, and a hot circulating fluid recovery tank 203. The outlet of the coolant storage tank 202 is connected to the cooling inlet of the charging device 201. The outlet of the heating fluid storage tank 204 is connected to the heating inlet of the charging device 201. The inlet of the hot circulating fluid recovery tank 203 is connected to the outlet of the charging device 201. The recovery outlet of the hot circulating fluid recovery tank 203 is connected to the inlet of the coolant storage tank 202 and the inlet of the heating fluid storage tank 204, respectively. The charging temperature control method includes some or all of the following steps.

[0024] S100: Obtain the charging condition parameters of battery pack 1.

[0025] In this embodiment, the charging condition parameter refers to the current charging operating state of battery pack 1, that is, the charging operating data of battery pack 1, which corresponds to the real-time charging operating status of battery pack 1. By collecting the charging condition parameter, it is easy to determine the charging status of battery pack 1 during the current charging process.

[0026] S200: Perform charging liquid thermal adjustment processing on the charging operating condition parameters and preset operating condition parameters to obtain the charging cold and heat adjustment value.

[0027] In this embodiment, the charging condition parameters refer to the current charging operating state of battery pack 1, that is, the charging operating data of battery pack 1, which corresponds to the real-time charging operating status of battery pack 1. Collecting the charging condition parameters facilitates determining the charging status of battery pack 1 during the current charging process. The preset operating condition parameters represent the standard charging operating state of battery pack 1, that is, the preset operating condition parameters are the reference charging operating data of battery pack 1, which corresponds to the specified charging operating state of battery pack 1. Through the charging liquid thermal adjustment processing between the charging condition parameters and the preset operating condition parameters, the degree of difference in the real-time changes in the charging state of battery pack 1 is easily determined.

[0028] S300: Sends a charging cooling and heating control signal to the liquid thermal controller based on the charging cooling and heating difference value to adjust the charging liquid filling mode of battery pack 1.

[0029] In this embodiment, the charging thermal adjustment value is obtained based on the charging condition parameters and preset condition parameters. The charging condition parameters are the current charging operating state of battery pack 1, that is, the charging operating data of battery pack 1, and thus correspond to the real-time charging operating status of battery pack 1. By collecting the charging condition parameters, it is easy to determine the charging status of battery pack 1 during the current charging process. The preset condition parameters are the standard charging operating state of battery pack 1, that is, the preset condition parameters are the reference charging operating data of battery pack 1, and thus correspond to the specified charging operating state of battery pack 1. Through the charging thermal adjustment processing of the charging condition parameters and preset condition parameters, it is easy to determine the degree of difference in the real-time changes of the charging state of battery pack 1. After obtaining the charging temperature difference value, the degree of difference between the current charging state of battery pack 1 and the standard safe charging state can be determined. By sending a charging temperature control signal to the liquid thermal controller, the charging liquid filling mode of battery pack 1 is adjusted to provide feedback adjustment of the cooling and heating method required for charging battery pack 1, ensuring that the charging state of battery pack 1 is always maintained in the optimal state, thereby effectively improving the charging safety and efficiency of battery pack 1 under all climate conditions.

[0030] In this embodiment, after collecting the charging condition parameters, the current charging state of the battery pack 1 is determined. Then, the charging condition parameters are compared with the preset condition parameters to determine the degree of difference in the real-time changes in the charging state of the battery pack 1. Finally, based on the degree of difference, the charging and electrolyte filling mode of the battery pack 1 is adjusted to provide feedback adjustment to the charging environment of the battery pack 1, so that the charging state of the battery pack 1 is always maintained in the optimal state, thereby improving charging safety and efficiency under all weather conditions.

[0031] In another embodiment, the charging device 201 is a charging pile or charging cabinet. The charging device 201 collects operating condition data through a communication module in the battery pack 1. For example, the battery pack 1 has a built-in IoT / Bluetooth / 4G communication module.

[0032] In one embodiment, acquiring the charging condition parameters of battery pack 1 includes acquiring the charging access temperature of battery pack 1. In this embodiment, the charging condition parameters refer to the current charging operating state of battery pack 1, that is, the charging operating data of battery pack 1, which corresponds to the real-time charging operating status of battery pack 1. Acquiring the charging condition parameters facilitates determining the charging status of battery pack 1 during the current charging process. The charging condition parameters include the charging access temperature of battery pack 1, which is the internal coolant temperature of battery pack 1 when it is connected to the charging device 201 for charging; that is, the initial temperature of the internal coolant of battery pack 1 during the charging process. Acquiring the charging access temperature facilitates determining the temperature of battery pack 1 at the start of charging.

[0033] Furthermore, the charging condition parameters and preset operating condition parameters are subjected to charging fluid thermal adjustment processing to obtain the charging thermal adjustment value, including: calculating the adjustment between the charging access temperature and the preset charging temperature to obtain the charging temperature difference. In this embodiment, the charging condition parameters are the current charging operating state of battery pack 1, that is, the charging condition parameters are the charging operating data of battery pack 1, and that is, the charging condition parameters correspond to the real-time charging operating status of battery pack 1. By collecting the charging condition parameters, it is easy to determine the charging status of battery pack 1 during the current charging process. The preset operating condition parameters are the standard charging operating state of battery pack 1, that is, the preset operating condition parameters are the reference charging operating data of battery pack 1, and that is, the preset operating condition parameters correspond to the specified charging operating status of battery pack 1. Through the charging fluid thermal adjustment processing of the charging condition parameters and preset parameters, it is easy to determine the degree of difference in the real-time changes of the charging state of battery pack 1. The charging parameters include the charging access temperature of battery pack 1, which is the temperature of the internal coolant of battery pack 1 when it is connected to the charging device 201 for charging; that is, the initial temperature of the internal coolant of battery pack 1 during the charging process. Collecting the charging access temperature facilitates determining the temperature of the internal coolant of battery pack 1 at the start of charging. Adjusting the charging access temperature against the preset charging temperature helps determine the degree of difference in the initial charging temperature of battery pack 1. The preset charging temperature is the safe charging temperature, specifically ranging from 0℃ to 45℃.

[0034] Furthermore, based on the charging temperature adjustment value, a charging temperature control signal is sent to the liquid thermal controller to adjust the charging liquid filling mode of battery pack 1. This includes: detecting whether the charging temperature difference matches the preset temperature difference; when the charging temperature difference matches the preset temperature difference, sending a charging signal without temperature adjustment to the liquid thermal controller to enable battery pack 1 to start the charging mode. In this embodiment, the charging temperature adjustment value is obtained based on the charging condition parameters and preset condition parameters. The charging condition parameters are the current charging operating state of battery pack 1, that is, the charging operating data of battery pack 1, which corresponds to the real-time charging operating status of battery pack 1. By collecting the charging condition parameters, it is easy to determine the charging status of battery pack 1 during the current charging process. The preset condition parameters are the standard charging operating state of battery pack 1, that is, the preset condition parameters are the reference charging operating data of battery pack 1, which corresponds to the specified charging operating state of battery pack 1. Through the charging liquid thermal adjustment processing of the charging condition parameters and preset condition parameters, it is easy to determine the degree of difference in the real-time changes of the charging state of battery pack 1. After obtaining the charging temperature adjustment value, the degree of difference between the current charging state of battery pack 1 and the standard safe charging state is determined. By sending a charging temperature control signal to the liquid thermal controller, the charging liquid filling mode of battery pack 1 is adjusted to provide feedback regulation of the cooling and heating methods required for charging battery pack 1, ensuring that the charging state of battery pack 1 is always maintained in the optimal state, thereby effectively improving the charging safety and efficiency of battery pack 1 under all-weather conditions. The charging condition parameters include the charging access temperature of battery pack 1, which is the temperature of battery pack 1 when it is connected to the charging device 201 for charging, that is, the initial temperature of battery pack 1 during the charging process. By collecting the charging access temperature, it is easy to determine the temperature of battery pack 1 at the beginning of charging. The adjustment operation between the charging access temperature and the preset charging temperature is easy to determine the degree of difference in the initial charging temperature of battery pack 1. The matching of the charging temperature difference with the preset temperature difference indicates that the initial charging temperature of battery pack 1 is within the safe temperature range. At this time, a cold / hot charging signal is sent to the liquid thermal controller to start the charging mode of battery pack 1 and start safe charging of battery pack 1.

[0035] In another embodiment, after detecting whether the charging temperature difference matches a preset temperature difference, the method further includes: when the charging temperature difference is greater than the preset temperature difference, sending a charging cold start signal to the liquid thermal controller to cause the coolant storage tank 202 to deliver coolant to the battery pack 1 and activate the cooling pre-cooling mode. In this embodiment, the charging temperature difference being greater than the preset temperature difference indicates that the initial charging temperature of the battery pack 1 exceeds the safe temperature, i.e., the initial charging temperature of the battery pack 1 is too high. At this time, sending a charging cold start signal to the liquid thermal controller opens the outlet of the coolant storage tank 202, facilitating the replacement of the battery pack 1 with coolant at a safe temperature to replace the original high-temperature coolant, so that the charging temperature of the battery pack 1 drops rapidly to a safe temperature.

[0036] In another embodiment, when the charging temperature difference is less than a preset temperature difference, a charging start signal is sent to the liquid thermal controller to cause the heating fluid storage tank 204 to deliver heated coolant to the battery pack 1, thus initiating the heating preheating mode. In this embodiment, the charging temperature difference being less than the preset temperature difference indicates that the initial charging temperature of the battery pack 1 is lower than the safe temperature, meaning the initial charging temperature of the battery pack 1 is too low. At this time, a charging start signal is sent to the liquid thermal controller to open the outlet of the heating fluid storage tank 204, facilitating the replacement of the battery pack 1 with coolant at a safe temperature to replace the original low-temperature coolant, thereby allowing the charging temperature of the battery pack 1 to rise rapidly to the safe temperature.

[0037] In one embodiment, obtaining the charging condition parameters of battery pack 1 includes obtaining the charging current rate of battery pack 1. In this embodiment, the charging condition parameters are the current charging operating state of battery pack 1, that is, the charging condition parameters are the charging operating data of battery pack 1, and the charging condition parameters correspond to the real-time charging operating status of battery pack 1. By collecting the charging condition parameters, it is easy to determine the charging status of battery pack 1 during the current charging process. The charging condition parameters include the charging current rate of battery pack 1, which is the charging rate of battery pack 1 when it is connected to the charging device 201 for charging, that is, the charging current rate of battery pack 1 during the charging process. By collecting the charging current rate, it is easy to determine the charging rate of battery pack 1 during the charging process.

[0038] Furthermore, the charging condition parameters are compared with preset operating condition parameters using a charging fluid thermal adjustment process to obtain a charging thermal adjustment value. This includes calculating the adjustment between the charging current rate and the preset charging rate to obtain the charging ratio difference. In this embodiment, the charging condition parameters represent the current charging operating state of battery pack 1, i.e., the charging operating condition parameters are the charging operating data of battery pack 1, and thus correspond to the real-time charging operating status of battery pack 1. Collecting the charging condition parameters facilitates determining the charging status of battery pack 1 during the current charging process. The preset operating condition parameters represent the standard charging operating state of battery pack 1, i.e., the preset operating condition parameters are the reference charging operating data of battery pack 1, and thus correspond to the specified charging operating state of battery pack 1. The charging fluid thermal adjustment process between the charging condition parameters and the preset parameters facilitates determining the degree of difference in the real-time changes in the charging state of battery pack 1. The charging parameters include the charging current rate of battery pack 1. This charging current rate is the charging rate of battery pack 1 when it is connected to the charging device 201, i.e., the real-time charging rate of battery pack 1 during the charging process. By collecting the charging current rate, it is easy to determine the charging rate of battery pack 1 during the charging process. Adjusting the charging current rate against the preset charging rate helps determine the degree of difference in the real-time charging rate of battery pack 1.

[0039] Furthermore, based on the charging temperature adjustment value, a charging temperature control signal is sent to the liquid thermal controller to adjust the charging liquid filling mode of battery pack 1. This includes: detecting whether the charging ratio is less than or equal to a preset ratio; when the charging ratio is less than or equal to the preset ratio, sending a normal charging signal to the liquid thermal controller to enable battery pack 1 to start a normal charging mode with a rate less than or equal to 1C. In this embodiment, the charging temperature adjustment value is obtained based on the charging condition parameters and preset condition parameters. The charging condition parameters are the current charging operating state of battery pack 1, that is, the charging operating data of battery pack 1, and thus correspond to the real-time charging operating status of battery pack 1. By collecting the charging condition parameters, it is easy to determine the charging status of battery pack 1 during the current charging process. The preset condition parameters are the standard charging operating state of battery pack 1, that is, the preset condition parameters are the reference charging operating data of battery pack 1, and thus correspond to the specified charging operating state of battery pack 1. By adjusting the charging condition parameters against the preset parameters, the degree of difference in real-time charging state of battery pack 1 can be easily determined. After obtaining the charging temperature adjustment value, the degree of difference between the current charging state of battery pack 1 and the standard safe charging state can be determined. By sending a charging temperature control signal to the liquid thermal controller, the charging liquid filling mode of battery pack 1 is adjusted to provide feedback regulation of the cooling and heating methods required for charging battery pack 1, ensuring that the charging state of battery pack 1 is always maintained in the optimal state, thereby effectively improving the charging safety and efficiency of battery pack 1 under all-weather conditions. The charging condition parameters include the charging current rate of battery pack 1, which is the charging rate of battery pack 1 when it is connected to the charging device 201 for charging, that is, the real-time charging rate of battery pack 1 during the charging process. By collecting the charging current rate, the charging rate of battery pack 1 during the charging process can be easily determined. The adjustment operation between the charging current rate and the preset charging rate facilitates the determination of the degree of difference in the real-time charging rate of battery pack 1. If the charging rate difference is less than or equal to the preset rate difference, it indicates that the real-time charging rate of battery pack 1 is within the charging rate range of the normal charging mode. At this time, a normal charging signal is sent to the liquid heat controller so that the charging mode of battery pack 1 adopts the normal charging method, that is, normal charging with a charging rate of less than or equal to 1C. There is no need to exchange the coolant. At this time, the circulation path of coolant storage tank 202 and heating fluid storage tank 204 is closed.

[0040] In another embodiment, after detecting whether the charging difference is less than or equal to a preset difference, the method further includes: when the charging difference is greater than the preset difference, sending a fast charging signal to the liquid thermal controller to enable the battery pack 1 to start a fast charging mode with a rate greater than 1C. In this embodiment, the charging difference being greater than the preset difference indicates that the real-time charging rate of the battery pack 1 is within the charging rate range of the fast charging mode. At this time, a fast charging signal is sent to the liquid thermal controller to enable the battery pack 1 to adopt a fast charging mode, i.e., normal charging with a charging rate greater than 1C. The fast charging rate can be determined according to the temperature of the battery pack 1. Moreover, at this time, one of the circulation paths of the coolant storage tank 202 and the heating fluid storage tank 204 is opened to ensure that the temperature of the battery pack 1 is at a safe temperature during fast charging mode.

[0041] In another embodiment, the determination and control steps of the charging current rate are performed after the determination and control steps of the charging access temperature. That is, the battery pack 1 is preheated or precooled according to the charging access temperature, and then the charging mode of the battery pack 1 is adjusted according to the charging current rate to adapt the charging rate to the charging temperature.

[0042] In another embodiment, the charging condition parameters also include battery voltage or SOC.

[0043] During the actual charging process of battery pack 1, in addition to the fact that changes in the external environment of battery pack 1 can easily affect charging safety, the charging method of battery pack 1 is selected by the user during charging. Different charging modes also have a significant impact on the coolant inside battery pack 1. In order to improve the overall safety of charging battery pack 1, such as... Figure 3 As shown, the step of sending a charging cooling and heating control signal to the liquid thermal controller based on the charging cooling and heating difference value to adjust the charging liquid filling mode of battery pack 1, and then further includes the following steps: Obtain the battery temperature during fast charging of battery pack 1; Check if the battery temperature during fast charging is higher than the preset fast charging temperature; When the battery temperature exceeds the preset fast charging temperature during fast charging, a rate-reduction cooling signal is sent to the liquid thermal controller to reduce the fast charging rate of the charging device 201 on the battery pack 1, while simultaneously increasing the amount of coolant replaced in the battery pack 1 by the coolant storage tank 202.

[0044] In this embodiment, the battery temperature during fast charging is the internal coolant temperature of battery pack 1 during the fast charging process. Furthermore, the coolant within battery pack 1 is circulating, and its internal temperature changes in real time. The preset fast charging temperature is the safe charging temperature of battery pack 1 during fast charging; for example, different fast charging rates correspond to different safe fast charging temperatures. If the battery temperature during fast charging is higher than the preset fast charging temperature, it indicates that the internal coolant temperature of battery pack 1 is too high, i.e., the temperature of battery pack 1 exceeds the standard. At this time, a rate-reduction cooling signal is sent to the liquid thermal controller to reduce the fast charging rate of battery pack 1 and increase the replacement amount of coolant during current circulation, so that the temperature of battery pack 1 during fast charging remains at the safe charging temperature.

[0045] In another embodiment, when the battery temperature is less than or equal to a preset fast charging temperature during fast charging, a continuous fast charging signal is sent to the liquid thermal controller to maintain the current fast charging mode.

[0046] Furthermore, during normal charging, the temperature of the coolant also affects charging safety. The step of sending a charging temperature control signal to the liquid thermal controller based on the charging temperature difference value to adjust the charging liquid filling mode of battery pack 1 further includes: Obtain the battery temperature of battery pack 1 during constant charging; Check if the battery temperature during constant charging is higher than the preset constant charging temperature; When the battery temperature during normal charging exceeds the preset normal charging temperature, a stop charging and strong cooling signal is sent to the liquid thermal controller to stop the charging device 201 from charging the battery pack 1 and force the coolant storage tank 202 to replace the low-temperature coolant in the battery pack 1.

[0047] In this embodiment, the battery temperature during constant charging is the internal coolant temperature of battery pack 1 during normal charging. Furthermore, the coolant within battery pack 1 is circulating, and its internal temperature changes in real time. The constant charging rate is less than or equal to 1C. The preset constant charging temperature is the safe charging temperature of battery pack 1 during normal charging, for example, 60°C. If the battery temperature during constant charging is higher than the preset constant charging temperature, it indicates that the internal coolant temperature of battery pack 1 is too high during normal charging, i.e., the constant charging temperature of battery pack 1 is abnormal. At this time, a stop-charging and forced-cooling signal is sent to the liquid thermal controller to immediately stop constant charging of battery pack 1 and forcibly open the coolant storage tank 202 to inject low-temperature coolant into battery pack 1, replacing the original high-temperature coolant, so that battery pack 1 cools down to a safe temperature as quickly as possible.

[0048] In another embodiment, before the battery temperature drops below the preset constant charging temperature during continuous charging, the coolant storage tank 202 continuously replaces the coolant in the battery pack 1, and the charging device 201 continuously issues an alarm. After the battery temperature drops below the preset constant charging temperature during continuous charging, the charging device 201 decides whether to resume charging based on the actual situation, such as the remaining amount of coolant in the coolant storage tank 202.

[0049] In another embodiment, when the battery temperature during constant charging is higher than the preset constant charging temperature, a continuous constant charging signal is sent to the liquid thermal controller to maintain the current normal charging mode.

[0050] In another embodiment, the charging device 201, coolant storage tank 202, heating fluid storage tank 204, and hot circulating fluid recovery tank 203 are connected in a unidirectional manner. That is, the coolant storage tank 202 injects low-temperature coolant into the charging device 201 through the one-way outlet valve 101, the heating fluid storage tank 204 injects heated coolant into the charging device 201, and the hot circulating fluid recovery tank 203 recovers coolant from the charging device 201 through the one-way inlet valve 102. The hot circulating fluid recovery tank 203 returns the recovered coolant to the coolant storage tank 202 and the heating fluid storage tank 204, respectively. All the above connections use one-way valves. The one-way valve between the hot circulating fluid recovery tank 203 and the coolant storage tank 202 has a filtration function, and the one-way valve between the hot circulating fluid recovery tank 203 and the heating fluid storage tank 204 also has a filtration function. That is, a one-way inlet filter valve is installed between the hot circulating fluid recovery tank 203 and the coolant storage tank 202, and a one-way inlet filter valve is also installed between the hot circulating fluid recovery tank 203 and the heating fluid storage tank 204, so as to filter impurities in the recovered coolant and improve the purity of the recovered coolant.

[0051] In another embodiment, the thermal management charging system 2 adopts multiple combinations, that is, the number of charging devices 201 and temperature regulating devices 3 in the thermal management charging system 2 is multiple, multiple coolant storage tanks 202 are connected to each other through a two-way valve 103, multiple heating liquid storage tanks 204 are connected to each other through a two-way valve 103, and multiple heat circulation liquid recovery tanks 203 are connected to each other through a two-way valve 103, so as to replenish coolant to other tanks.

[0052] In another embodiment, the charging device 201 is a charging pile or battery swapping cabinet, and the battery pack 1 is electrically connected to the charging pile or battery swapping cabinet via the charging cable 104 for charging.

[0053] In another embodiment, the thermal management charging system 2 for the battery pack 1 further includes a control module, the control terminal of which is used to control the on / off connection between the coolant storage tank, the heating fluid storage tank and the hot circulating fluid recovery tank, that is, to control the on / off connection of the aforementioned one-way inlet filter valve and the two-way valve.

[0054] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A thermal management charging system for a battery pack, characterized in that, include: A charging device, comprising a charging cable and a hot circulating fluid inlet / outlet pipe, wherein the charging cable is used to electrically connect to the charging end of the battery pack, and the hot circulating fluid inlet / outlet pipe is connected to the hot circulating fluid inlet / outlet of the battery pack. A temperature regulating device includes a coolant storage tank, a heating fluid storage tank, and a hot circulating fluid recovery tank. The outlet of the coolant storage tank is connected to the cooling inlet of the charging device, the outlet of the heating fluid storage tank is connected to the heating inlet of the charging device, the inlet of the hot circulating fluid recovery tank is connected to the outlet of the charging device, and the recovery outlet of the hot circulating fluid recovery tank is connected to the inlets of the coolant storage tank and the heating fluid storage tank, respectively. The control module, whose control terminal is used to control the on / off connection between the coolant storage tank, the heating fluid storage tank, and the hot circulating fluid recovery tank.

2. The thermal management charging system for a battery pack according to claim 1, characterized in that, The coolant storage tank injects low-temperature coolant into the charging device in one direction, the heating fluid storage tank injects heated coolant into the charging device in one direction, the thermal circulation fluid recovery tank recovers the coolant from the charging device in one direction, and the thermal circulation fluid recovery tank returns the recovered coolant to the coolant storage tank and the heating fluid storage tank respectively.

3. The thermal management charging system for a battery pack according to claim 2, characterized in that, One-way inlet filter valves are installed between the hot circulating fluid recovery tank and the coolant storage tank, as well as between the hot circulating fluid recovery tank and the heating fluid storage tank.

4. The thermal management charging system for a battery pack according to claim 1, characterized in that, There are multiple charging devices and temperature control devices. Multiple coolant storage tanks, multiple heating fluid storage tanks, and multiple hot circulating fluid recovery tanks are connected by bidirectional valves.

5. A charging temperature control method, applied to the thermal management charging system for a battery pack as described in any one of claims 1 to 4, characterized in that, The charging temperature control method includes: Obtain the charging status parameters of the battery pack; The charging operating parameters are compared with the preset operating parameters by the charging liquid thermal adjustment process to obtain the charging cold and heat adjustment value. Based on the difference between charging temperature and heat, a charging temperature and heat regulation signal is sent to the liquid thermal controller to adjust the charging and liquid filling mode of the battery pack.

6. The charging temperature control method according to claim 5, characterized in that, Obtain the charging status parameters of the battery pack, including: Obtain the charging connection temperature of the battery pack.

7. The charging temperature control method according to claim 6, characterized in that, The charging operating parameters are compared with the preset operating parameters using a charging liquid thermal adjustment process to obtain the charging cold and heat adjustment value, including: Calculate the difference between the charging input temperature and the preset charging temperature to obtain the charging temperature difference.

8. The charging temperature control method according to claim 7, characterized in that, The preset charging temperature is 0℃ to 45℃.

9. The charging temperature control method according to claim 7, characterized in that, Based on the charging temperature difference value, a charging temperature regulation signal is sent to the liquid thermal controller to adjust the charging liquid filling mode of the battery pack, including: Check if the charging temperature difference matches the preset temperature difference; When the charging temperature difference matches the preset temperature difference, a hot-and-cold charging signal is sent to the liquid thermal controller to enable the battery pack to start charging mode.

10. The charging temperature control method according to claim 9, characterized in that, The process includes checking whether the charging temperature difference matches the preset temperature difference, and then further including: When the charging temperature difference is greater than the preset temperature difference, a charging cold start signal is sent to the liquid thermal controller to enable the coolant storage tank to deliver coolant to the battery pack and start the cooling pre-cooling mode. And / or, when the charging temperature difference is less than the preset temperature difference, a charging start signal is sent to the liquid thermal controller to cause the heating liquid storage tank to deliver heated coolant to the battery pack and start the heating preheating mode.

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