A charging system and method with battery temperature control

Abstract

The application discloses a charging system and method with battery temperature control, and relates to the technical field of automobile charging, which comprises a charging component that charges a power battery according to a charging instruction, wherein the charging instruction comprises real-time charging power and a target electric quantity; a temperature control component that adjusts the temperature of the power battery according to a temperature control instruction, wherein the temperature control instruction comprises a target temperature; and a control component that collects the real-time residual electric quantity of the power battery, processes the charging instruction, collects the real-time temperature and real-time charging power of the power battery during charging to obtain the temperature control instruction, and adjusts the real-time charging power according to the temperature adjustment range preset by the temperature control component when it is judged that the target temperature exceeds the temperature adjustment range. The application can adjust the temperature of the power battery while charging, improve the safety of the charging system, and adjust the real-time charging power according to the temperature adjustment capability feedback of the charging system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy vehicles, in particular to a charging system and method with battery temperature control. BACKGROUND

[0002] The new energy vehicle power battery as the power source of the vehicle, the heat generated by its charging and discharging will always exist. The performance of the power battery is closely related to the battery temperature. In order to prolong the service life of the power battery as much as possible and obtain the maximum power, the storage battery needs to be used within a specified temperature range. In principle, within the range of -40℃ to +55℃, the actual battery temperature of the power battery unit is in a runnable state. Therefore, the current power battery unit of the new energy vehicle is equipped with a cooling device. The power battery cooling system has air conditioning circulation cooling type, water cooling type and air cooling type.

[0003] Taking the air conditioning circulation cooling type as an example, in high-end electric vehicles, the power battery has a refrigerant circulation loop connected with the air conditioning system. The power battery unit is directly cooled by the cooling liquid, and the cooling liquid circulation loop is connected with the refrigerant circulation loop through a cooling liquid refrigerant heat exchanger, i.e. a cooling unit. Therefore, the refrigerant circulation loop of the air conditioning system is composed of two parallel branches. One is used for cooling the vehicle interior space, and the other is used for cooling the power battery unit. An electric cooling liquid pump transports the cooling liquid through the cooling liquid circulation loop. As long as the temperature of the cooling liquid is lower than that of the battery module, the battery module can be cooled only by the circulation flow of the cooling liquid. The temperature of the cooling liquid rises, which is not enough to keep the temperature of the battery module within the expected range. Therefore, the temperature of the cooling liquid must be reduced, which needs the help of the cooling liquid refrigerant heat exchanger, i.e. the cooling unit.

[0004] With the development of new energy vehicle power batteries, the development of high-density, high-power and fast-charging new energy vehicles is encouraged. In the current such vehicles, in order to ensure that the power battery operates within the appropriate temperature range, during charging and discharging, the vehicle often needs to match the above-mentioned high-power temperature control unit. Since the power battery has greater heat dissipation demand in the charging working condition than in the discharging working condition, the battery system needs to have great heat dissipation capacity to meet higher charging rate. The shortcomings of the existing high-power temperature control unit are increasingly obvious, for example, in normal driving and operating scenarios, the high-power temperature control unit does not need to work at the maximum cooling efficiency, so the power of the vehicle-mounted high-power temperature control unit is in a state of overflow most of the time. In addition, the current high-power temperature control unit has a complex structure, which affects the layout of the vehicle, is not conducive to weight reduction of the vehicle, and greatly increases the design and manufacturing costs of the vehicle. If the existing high-power temperature control unit is continued to be used on new energy vehicles to regulate and control the temperature of the power battery, as the fast-charging demand of the power battery becomes higher and higher, the huge heat dissipation demand brought by short-time charging will inevitably lead to the design of larger, heavier and higher-power temperature control units by the vehicle designers to ensure the safe charging.

[0005] In the prior art, the battery temperature control unit is usually matched on the whole vehicle, and the charging equipment side does not have the battery temperature control function. In order to ensure the charging speed of the battery, the battery is charged with a large current, which usually reaches or even exceeds 1C charging, and a large amount of heat is generated. The current charging pile (station) has no battery temperature control power, and cannot heat or cool the battery according to the implementation demand, and needs to match a large temperature control unit with the whole vehicle, which affects the layout space of the whole vehicle and increases the cost of the whole vehicle. Moreover, the current vehicle-mounted battery temperature control system cannot adjust the cooling liquid flow and the cooling liquid temperature, which also affects the refrigeration effect. SUMMARY

[0006] In view of the defects in the prior art, the purpose of the present application is to provide a charging system and method with battery temperature control, which can adjust the temperature of the power battery while charging, improve the safety of the charging system, and adjust the real-time charging power according to the temperature adjustment capability feedback of the charging system.

[0007] To achieve the above purpose, the technical scheme adopted is:

[0008] The first aspect of the present application provides a charging system with battery temperature control, which comprises:

[0009] a charging component for charging the power battery according to a charging instruction, the charging instruction comprising a real-time charging power and a target electric quantity;

[0010] a temperature control component for adjusting the temperature of the power battery according to a temperature control instruction, the temperature control instruction comprising a target temperature;

[0011] a control component for collecting the real-time residual electric quantity of the power battery and processing to obtain the charging instruction; further for collecting the real-time temperature and the real-time charging power of the power battery during charging and processing to obtain the temperature control instruction; and further for adjusting the real-time charging power when judging that the target temperature exceeds the temperature adjustment range according to the temperature adjustment range preset by the temperature control component.

[0012] In some embodiments, the control component collects the real-time residual electric quantity and the real-time temperature through a battery management system;

[0013] The charging component and the temperature control component are connected to the same socket on the power battery.

[0014] In some embodiments, the temperature control component comprises:

[0015] a heating module connected to a main circuit connected to a plurality of power batteries, for heating the cooling liquid output by the plurality of power batteries, and after obtaining the cooling liquid meeting the target temperature, the cooling liquid is delivered back to the power battery;

[0016] The cooling module, whose main circuit is connected to the multiple power batteries, includes a cooling pool containing coolant, which is used to regulate the temperature of the coolant output by the multiple power batteries, and after obtaining coolant that meets the target temperature, the coolant is sent back to the power batteries.

[0017] The control module is used to collect the real-time temperature and real-time power of the multiple power batteries during charging, and process them to obtain the target temperature of each power battery; the control module is also used to control the real-time flow rate of the coolant delivered to each power battery by the heating module and the cooling module.

[0018] In some embodiments, the control module includes:

[0019] Multiple branch controllers are used to collect the real-time temperature and real-time power of each power battery respectively; they are also used to collect the temperature and flow rate of the coolant output by each power battery, as well as the temperature and flow rate of the coolant input to each power battery, and send the collected temperature and flow rate data to the main controller 0; they are also used to control the flow rate of the coolant input to each power battery according to the flow control command of the main controller 0; each branch controller corresponds to one power battery.

[0020] The main controller 0 is used to process the real-time temperature and real-time power sent by each branch controller to obtain the target control temperature of each power battery, and to perform average processing on the target control temperatures of all power batteries to obtain the target temperature; it is also used to obtain the flow control command based on the target temperature and in combination with the real-time temperature and real-time power of each power battery.

[0021] A flow-controlled water pump is used by the branch controller to control the flow rate of coolant input to the power battery.

[0022] In some embodiments, the power battery is provided with a vehicle-end water outlet connector for outputting coolant and a vehicle-end water inlet connector for receiving coolant, and the control module is provided with a temperature control end water outlet connector for outputting coolant and a temperature control end water inlet connector for receiving coolant.

[0023] The vehicle-end water outlet connector is connected to the vehicle-mounted cooling unit through the water outlet pipe. A first quick-connect plug is provided on the water outlet pipe. When the vehicle is charging, the temperature control end water inlet connector is detachably connected to the first quick-connect plug.

[0024] The vehicle-end water inlet connector is connected to the vehicle-mounted cooling unit through a water inlet pipe. A second quick-connect plug is provided on the water inlet pipe. When the vehicle is charging, the temperature control end water outlet connector is detachably connected to the second quick-connect plug.

[0025] In some embodiments, the temperature control component further includes:

[0026] An auxiliary cooling module is used to cool the coolant flowing from the power battery or the coolant flowing from the cooling module.

[0027] In some embodiments, the temperature control component further includes:

[0028] The first control water valve is connected to the control module, the heating module, and the cooling module respectively, and is used to control the flow of coolant from all power batteries to the heating module or the cooling module according to the flow direction control command of the control module.

[0029] The second control water valve is connected to the control module and the cooling module respectively. It is used to control part of the coolant flowing from the first control water valve to flow to the cooling pool according to the flow direction control command of the control module, and to control another part of the coolant flowing from the first control water valve to mix with the coolant flowing from the cooling pool.

[0030] A sub-control module, which is connected to the control module, the cooling module, the heating module, and the auxiliary refrigeration module respectively, is used to control the opening and closing of the heating module and the auxiliary refrigeration module as the coolant flowing out from the second control water valve flows through the heating module, the auxiliary refrigeration module, and the power battery in sequence, according to the flow direction control command of the control module.

[0031] The first control water valve and the second control water valve can be integrated into one water valve.

[0032] In some embodiments, when the control module determines that the target temperature is higher than the water temperature of the main circuit and the coolant temperature in the cooling pool is higher than the water temperature of the main circuit, if the coolant temperature in the cooling pool is higher than the target temperature, then the first control water valve controls all the coolant flowing out of the power battery to flow to the cooling module, and the second control water valve controls the percentage of coolant flowing into the cooling pool to obtain a mixed coolant that meets the target temperature. If the coolant temperature in the cooling pool is lower than the target temperature, then the first control water valve controls all the coolant flowing out of the power battery to flow to the cooling module, the second control water valve controls the percentage of coolant flowing into the cooling pool, and the sub-control module controls the mixed coolant to be further heated when flowing through the heating module to obtain a coolant that meets the target temperature.

[0033] When the control module determines that the target temperature is higher than the water temperature of the main circuit and the coolant temperature in the cooling pool is lower than the water temperature of the main circuit, it controls the coolant flowing out of the power battery to flow to the heating module through the first control water valve to obtain coolant that meets the target temperature.

[0034] All the coolant output from the power batteries is collected in the main circuit and then sent to the control module for judgment.

[0035] After obtaining coolant that meets the target temperature, the coolant is returned to the power battery.

[0036] In some embodiments, when the control module determines that the target temperature is lower than the water temperature of the main circuit and the coolant temperature in the cooling pool is higher than the water temperature of the main circuit, it controls the coolant flowing out of the power battery to flow to the auxiliary cooling module through the first control water valve to obtain coolant that meets the target temperature.

[0037] When the control module determines that the target temperature is lower than the water temperature of the main circuit and the coolant temperature in the cooling pool is lower than the water temperature of the main circuit, if the coolant temperature in the cooling pool is higher than the target temperature, it controls all the coolant flowing out of the power battery to flow to the cooling module through the first control water valve and the second control water valve, and controls the coolant flowing out of the cooling module to be further cooled when it flows through the auxiliary cooling module to obtain coolant that meets the target temperature. If the coolant temperature in the cooling pool is lower than the target temperature, it controls all the coolant flowing out of the power battery to flow to the cooling module through the first control water valve, and controls the percentage of coolant flowing into the cooling pool through the second control water valve to obtain coolant that meets the target temperature.

[0038] All the coolant output from the power batteries is collected in the main circuit and then sent to the control module for judgment.

[0039] After obtaining coolant that meets the target temperature, the coolant is returned to the power battery.

[0040] A charging method with battery temperature control, based on any one of the above-mentioned charging systems with battery temperature control, the method comprising:

[0041] The system collects the real-time remaining power of the power battery and processes it to obtain a charging command, which includes the real-time charging power and the target power.

[0042] The system collects the real-time temperature and real-time charging power of the power battery during charging, and processes them to obtain temperature control commands, which include the target temperature.

[0043] Charge the power battery according to the charging instructions until the power battery reaches the target capacity;

[0044] The temperature of the power battery is adjusted according to the temperature control command until the power battery reaches the target temperature.

[0045] Based on the preset temperature adjustment range, when it is determined that the target temperature exceeds the temperature adjustment range, the real-time charging power is adjusted.

[0046] The beneficial effects of the technical solution provided in this application include:

[0047] It can regulate the temperature of the power battery while charging, improve the safety of the charging system, and adjust the real-time charging power based on the temperature regulation capability of the charging system.

[0048] By designing an external battery temperature control system, the difficulty of vehicle design and the space occupied in the vehicle interior can be reduced, thereby reducing vehicle design and manufacturing costs.

[0049] After uniformly regulating the temperature of the coolant output from each power battery through heating or cooling modules, the temperature control efficiency of each power battery is further controlled by controlling the return flow to each power battery. This enables simultaneous temperature control of the power batteries of multiple vehicles during the charging of new energy vehicles, improving temperature control efficiency and accuracy.

[0050] By adding an auxiliary cooling module, the cooling efficiency can be further improved when the cooling module cannot meet the requirements, thus meeting the needs of the vehicle under extreme operating conditions and further improving the safety of vehicle charging.

[0051] Through a pre-set temperature strategy, when heating of the power battery is required, all coolant flowing from the power battery is directed to the heating module for heating, and then returned to the power battery to achieve heating. Alternatively, coolant in the cooling pool (temperature higher than the real-time temperature of the power battery) is first used to heat the coolant flowing from the power battery, and then it is determined whether further heating using the heating module is needed. When a minor cooling effect is required, all coolant flowing from the power battery is directed to the cooling module, with some flowing into the cooling pool and some not. The two are then mixed to obtain a slightly cooled coolant, which is then returned to the power battery to achieve cooling. When a major cooling effect is required, all coolant flowing from the power battery is directed to the cooling module, with all flowing into the cooling pool. The significantly cooled coolant from the cooling pool is then returned to the power battery to achieve cooling. When significant cooling of the power battery is required, all coolant flowing out of the power battery is controlled to sequentially flow to the cooling pool and auxiliary cooling module. The cooled coolant is then returned to the power battery to achieve cooling. This system can flexibly adjust the temperature control strategy for different operating conditions, improving the targeting and efficiency of temperature control. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the charging system with battery temperature control in an embodiment of the present invention.

[0053] Figure 2This is a schematic diagram illustrating the application of the temperature control component in an embodiment of the present invention.

[0054] Figure 3 This is a schematic diagram of the installation of the temperature control component in an embodiment of the present invention. Attached image description:

[0056] 1-Power battery; 2-Temperature control component; 3-Vehicle end water inlet connector; 4-Vehicle end water outlet connector; 5-Temperature control end water inlet connector; 6-Temperature control end water outlet connector; 7-First quick connector; 8-Second quick connector; 9-Branch controller; 10-Main controller; 11-Heating module; 12-Cooling module; 13-Auxiliary cooling module; 14-Flow control water pump; 15-First control water valve; 16-Second control water valve; 17-Sub-control module; 18-On-board cooling unit; 19-Charging component; 20-Control component. Detailed Implementation

[0057] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0058] like Figure 1 As shown, this embodiment of the invention provides a charging system with battery temperature control, including a control component connected to a charging component and a temperature control component. The charging component and the temperature control component respectively charge and regulate the temperature of the power battery, enabling the system to regulate the battery temperature while charging, thus improving the safety of the charging system. Furthermore, the system can adjust the real-time charging power based on the temperature regulation capability of the charging system.

[0059] In one specific embodiment, the charging component is used to charge the power battery according to a charging command, which includes real-time charging power and target capacity.

[0060] The temperature control component is used to regulate the temperature of the power battery according to temperature control commands, including the target temperature.

[0061] The control component is used to collect the real-time remaining power of the power battery and process it to obtain the charging command. It is also used to collect the real-time temperature and real-time charging power of the power battery during charging and process it to obtain the temperature control command. Furthermore, it is used to adjust the real-time charging power according to the temperature adjustment range preset by the temperature control component, when it determines that the target temperature exceeds the temperature adjustment range.

[0062] In this embodiment, the control component collects the real-time remaining power and the real-time temperature through the battery management system. The charging component and the temperature control component are connected to the same socket on the power battery.

[0063] Each power battery 1 is equipped with a BMS (Battery Management System). The real-time temperature of the power battery 1 during charging can be provided by the BMS, and the real-time power of the power battery 1 during charging can be provided by the BBS or by the charging pile.

[0064] In a preferred embodiment, the temperature control component 2, the system including the control module, is connected to the heating module 11 and the cooling module 12. The control module, heating module 11, and cooling module 12 are all connected to the coolant output terminal of the power battery 1 via a main circuit. The control module is mainly used to collect data signals from the power battery 1 and control the operation of the heating module 11 and cooling module 12. The heating module 11 is mainly used to heat the power battery 1, and the cooling module 12 is mainly used to cool the power battery 1. The control module is also used to control the real-time flow rate of coolant supplied by the heating module 11 and cooling module 12 to each power battery 1.

[0065] In this embodiment, multiple power batteries 1 can be simultaneously controlled by an external temperature control system, reducing the difficulty of vehicle design and the space occupied in the vehicle interior, and improving control efficiency and accuracy.

[0066] In one specific embodiment, the control module is used to collect the real-time temperature and real-time power of multiple power batteries 1 during charging, and process them respectively to obtain the target temperature of each power battery 1; the control module is also used to control the real-time flow rate of the coolant delivered by the heating module 11 and the cooling module 12 to each power battery 1.

[0067] The heating module 11 is connected to the multiple power batteries 1 and is used to heat the coolant output by the multiple power batteries 1. After obtaining coolant that meets the target temperature, the coolant is then sent back to the power batteries 1.

[0068] The cooling module 12 is connected to the plurality of power batteries 1 and is used to cool the coolant output by the plurality of power batteries 1. After obtaining coolant that meets the target temperature, the coolant is then transported back to the power batteries 1.

[0069] After the coolant output from all power batteries 1 is collected into the main circuit, the control module collects the water temperature of the main circuit and makes subsequent judgments.

[0070] In this embodiment, by designing an external battery temperature control system, the difficulty of vehicle design and the space occupied in the vehicle interior can be reduced, thereby reducing vehicle design and manufacturing costs.

[0071] After the heating module 11 and cooling module 12 uniformly regulate the temperature of the coolant output from each power battery 1, the temperature control efficiency of each power battery 1 is further controlled by controlling the return flow rate to each power battery 1. This enables simultaneous temperature control of the power batteries 1 of multiple vehicles during the charging of new energy vehicles, thereby improving temperature control efficiency and accuracy.

[0072] In a preferred embodiment, the control module includes a main controller 10, which is connected to a plurality of branch controllers 9 and a flow control pump 14.

[0073] Multiple branch controllers 9 are used to collect the aforementioned real-time temperature and real-time power of each power battery 1. They are also used to collect the temperature and flow rate of the coolant output from each power battery 1, as well as the temperature and flow rate of the coolant input to each power battery 1, and send the collected temperature and flow rate data to the main controller 10. They are also used to control the flow rate of the coolant input to each power battery 1 according to the flow control command from the main controller 10; each branch controller 9 corresponds one-to-one with each power battery 1.

[0074] The main controller 10 is used to obtain the target control temperature of each power battery 1 based on the real-time temperature and real-time power sent by each branch controller 9, and to perform averaging processing on the target control temperatures of all power batteries 1 to obtain the target temperature. It is also used to obtain the flow control command based on the target temperature and in combination with the real-time temperature and real-time power of each power battery 1. Specifically, the main controller 10 can also use other strategies to obtain the target temperature based on the target control temperatures of all power batteries 1. Overall, the main controller 10 selects the target temperature based on the principle of optimal economy.

[0075] The aforementioned branch controller 9 controls the flow rate of coolant input to the power battery 1 via the flow control water pump 14.

[0076] Furthermore, the aforementioned branch controllers 9 and the aforementioned main controller 10 are integrated into the same hardware. Specifically, when the main controller 10 has sufficient computing power, temperature control of each power battery 1 can be achieved solely through the main controller 10, without involving the branch controllers 9.

[0077] In this embodiment, after the cooling module 11 and the cooling module 12 are used to uniformly regulate the temperature of the coolant output by each power battery 1, the temperature control efficiency of each power battery 1 is further controlled by controlling the return flow rate to each power battery 1. This enables simultaneous temperature control of the power batteries 1 of multiple vehicles during the charging of new energy vehicles, thereby improving temperature control efficiency and accuracy.

[0078] In a preferred embodiment, such asFigure 2 As shown, the power battery 1 is provided with a vehicle-end water outlet connector 4 for outputting coolant and a vehicle-end water inlet connector 3 for receiving coolant, and the control module is provided with a temperature control end water outlet connector 6 for outputting coolant and a temperature control end water inlet connector 5 for receiving coolant.

[0079] The aforementioned vehicle-side water outlet connector 4 is connected to the vehicle-mounted cooling unit via a water outlet pipe. A first quick-connect plug 7 is provided on the water outlet pipe. When the vehicle is charging, the aforementioned temperature control end water inlet connector 5 can be detachably connected to the first quick-connect plug 7.

[0080] The aforementioned vehicle-side water inlet connector 3 is connected to the vehicle-mounted cooling unit via a water inlet pipe. A second quick-connect plug 8 is provided on the water inlet pipe. When the vehicle is charging, the aforementioned temperature control end water outlet connector 6 can be detachably connected to the second quick-connect plug 8.

[0081] By installing the aforementioned multiple quick-connect plugs on the existing inlet and outlet water pipes of the power battery 1 and the on-board cooling unit, when the vehicle is not charging, the power battery 1 and the temperature control component 2 are not connected; instead, the on-board cooling unit still controls the temperature of the power battery 1. When the vehicle is charging, the temperature control component 2 is plugged into the aforementioned multiple quick-connect plugs, and the temperature control component 2 controls the temperature of the power battery 1 during fast charging. This eliminates the need to design and install high-power cooling devices on the vehicle, reducing vehicle design and manufacturing costs, minimizing the space occupied in the vehicle interior, and allowing for targeted temperature control of the power battery 1 for each vehicle based on the charging efficiency of each charging station. This broadens the application range and makes it more flexible in use.

[0082] In a preferred embodiment, the cooling pool is provided with a heat preservation and heat dissipation system for controlling the temperature of the coolant contained therein.

[0083] In this embodiment, the cooling pool contains a large volume of coolant to supply coolant to the power battery 1 and collect the high-temperature coolant flowing in from the power battery 1. Because the cooling pool has a large coolant capacity and is equipped with its own insulation and heat dissipation system, the coolant flowing in from the power battery 1 has little impact on the coolant temperature within the cooling pool. Therefore, the temperature of the coolant flowing out of the cooling pool can be kept relatively constant.

[0084] In a preferred embodiment, the system further includes an auxiliary cooling module 13 for further cooling the coolant flowing from the cooling module 12. The auxiliary cooling module 13 can be integrated with the temperature regulation module 11 in the same hardware, or it can be installed separately.

[0085] In this embodiment, by adding an auxiliary cooling module 13, the cooling efficiency is further improved when the cooling efficiency of the cooling module 12 cannot meet the requirements, thereby meeting the needs of the vehicle under extreme operating conditions and further improving the safety of vehicle charging.

[0086] In a preferred embodiment, the external battery temperature control system 2 further includes a first control water valve 15, a second control water valve 16, and a sub-control module 1.

[0087] The first control water valve 15, which is connected to the control module, the heating module 11, and the cooling module 12 respectively, is used to control the flow of coolant from all power batteries 1 to the heating module 11 or the cooling module 12 according to the flow control command of the control module. Specifically, when it is necessary to heat the power battery 1, it can be determined whether to directly send all the coolant output from the power battery to the heating module 11 for heating or to first send the coolant output from the power battery to the cooling pool for heating, based on whether the temperature of the coolant in the cooling pool is higher than the water temperature of the main circuit, i.e., whether the cooling pool can heat the power battery 1. Then, it is determined whether the coolant mixed with the hot water in the cooling pool needs to be further sent to the heating module 11 for further heating, based on whether the temperature of the coolant in the cooling pool is higher than the target temperature, i.e., whether the heating capacity of the cooling pool is sufficient. The above-mentioned flow diversion is achieved based on the first control water valve 15.

[0088] The second control water valve 16, connected to both the control module and the cooling module 12, controls a portion of the coolant flowing from the first control water valve 15 to flow into the cooling pool according to the flow direction control command from the control module. It also controls another portion of the coolant flowing from the first control water valve 15 to not enter the cooling pool, but instead mix with the coolant flowing from the cooling pool. Specifically, when heating the power battery is required, a portion of the power battery coolant is controlled to enter the cooling pool for heating. Then, the coolant output from the cooling pool is mixed with the remaining coolant from the power battery that did not enter the cooling pool. The second control water valve 16 can adjust the mixing ratio. Furthermore, when a smaller cooling effect on the power battery is required, coolant in the cooling pool, whose temperature is lower than the main circuit water temperature, can be mixed with the power battery coolant. The second control water valve 16 can adjust the mixing ratio. Furthermore, when a larger cooling effect on the power battery coolant is required, all the power battery coolant can be fed into the cooling pool for cooling. This flow diversion is achieved based on the second control water valve 16.

[0089] The sub-control module 17, connected to the control module, cooling module 12, heating module 11, and auxiliary cooling module 13, controls the opening and closing of the heating module 11 and auxiliary cooling module 13 as the coolant flowing from the second control water valve 16 sequentially flows through the heating module 11, auxiliary cooling module 13, and power battery 1, according to the flow direction control command from the control module. Specifically, the coolant output from the cooling pool (including the coolant entirely from the cooling pool and the mixture mentioned above) subsequently passes through the heating module 11 and auxiliary cooling module 13 sequentially, and is finally returned to the power battery 1. While flowing through the heating module 11 and auxiliary cooling module 13, the sub-control module 17 can control whether the heating module 11 and auxiliary cooling module 13 are operating. When the cooling or heating capacity of the cooling pool is sufficient, and the temperature of the coolant output from the cooling pool meets the target temperature, all the coolant output from the cooling pool is returned to the power battery. During this process, the sub-control module 17 controls both the heating module 11 and auxiliary cooling module 13 to be turned off. When the cooling or heating capacity of the cooling pool is insufficient, the temperature of the coolant output from the cooling pool does not meet the target temperature. In this case, the coolant output from the cooling pool is further transported to the heating module 11 for further heating or the auxiliary cooling module 13 for further cooling until the coolant meets the target temperature. Then, all of it is transported back to the power battery. During this process, if further heating is required, the sub-control module 17 starts the heating module 11. If further cooling is required, the sub-control module 17 starts the auxiliary cooling module 13.

[0090] In a preferred embodiment, when the control module determines that the target temperature is higher than the water temperature of the main circuit and the coolant temperature in the cooling pool is higher than the water temperature of the main circuit, if the coolant temperature in the cooling pool is higher than the target temperature, then the first control water valve 15 controls all the coolant flowing out of the power battery 1 to flow to the cooling module 12, and the second control water valve 16 controls the percentage of coolant flowing into the cooling pool to obtain a mixed coolant that meets the target temperature. If the coolant temperature in the cooling pool is lower than the target temperature, then the first control water valve 15 controls all the coolant flowing out of the power battery 1 to flow to the cooling module 12, the second control water valve 16 controls the percentage of coolant flowing into the cooling pool, and the sub-control module 17 controls the mixed coolant to flow to the heating module 11 for further heating to obtain a coolant that meets the target temperature.

[0091] When the control module determines that the target temperature is higher than the water temperature of the main circuit and the coolant temperature in the cooling pool is lower than the water temperature of the main circuit, it controls the first control water valve 15 to direct all the coolant flowing out of the power battery 1 to the heating module 11 to obtain coolant that meets the target temperature.

[0092] After obtaining coolant that meets the target temperature, the coolant is returned to the power battery 1.

[0093] In this embodiment, the relationship between the water temperature of the main circuit, the target temperature that the power battery 1 needs to be adjusted to, and the temperature of the coolant in the cooling pool determines the flow direction of the coolant output from the power battery 1 when adjusting the temperature.

[0094] When the target temperature is higher than the water temperature in the main circuit, it indicates that the power battery 1 needs to be heated. There are two situations: one is that the coolant temperature in the cooling pool is higher than the water temperature in the main circuit, meaning the cooling pool has a heating function; the other is that the coolant temperature in the cooling pool is lower than the water temperature in the main circuit, meaning the cooling pool does not have a heating function.

[0095] When the cooling pool has a heating function, it is further divided into two situations: one is that the coolant temperature in the cooling pool is higher than the target temperature, meaning the heating function of the cooling pool is sufficient; the other is that the coolant temperature in the cooling pool is lower than the target temperature, meaning the heating function of the cooling pool is insufficient. When the cooling pool's heating capacity is sufficient, the first control water valve 15 and the second control water valve 16 control all the coolant output from the power battery to flow into the cooling pool for heating to obtain coolant at the target temperature. The sub-control module 17 controls all the coolant at the target temperature to be returned to the power battery, and the sub-control module 17 controls both the heating module 11 and the auxiliary cooling module 13 to be turned off. When the cooling pool's heating capacity is insufficient, the first control water valve 15 and the second control water valve 16 control all the coolant output from the power battery to flow into the cooling pool for heating. Then, the sub-control module 17 controls the coolant output from the cooling pool to flow further into the heating module 11 for heating to obtain coolant at the target temperature, and then all the coolant is returned to the power battery. The sub-control module 17 controls the heating module 11 to start.

[0096] When the cooling pool does not have a heating function, the first control water valve 15 controls all the coolant output from the power battery to flow to the heating module 11 for heating to obtain coolant that meets the target temperature, and then all of it is sent back to the power battery.

[0097] In a preferred embodiment, when the control module determines that the target temperature is lower than the water temperature of the main circuit and the coolant temperature in the cooling pool is higher than the water temperature of the main circuit, it controls the first control water valve 15 to control all the coolant flowing out of the power battery 1 to flow to the auxiliary cooling module 13 to obtain coolant that meets the target temperature, and the sub-control module 17 controls the auxiliary cooling module 13 to turn on.

[0098] When the control module determines that the target temperature is lower than the water temperature of the main circuit and the coolant temperature in the cooling pool is lower than the water temperature of the main circuit, if the coolant temperature in the cooling pool is higher than the target temperature, it controls all the coolant flowing out of the power battery 1 to flow to the cooling module 12 through the first control water valve 15 and the second control water valve 16, and controls the coolant flowing out of the cooling module 12 to be further cooled when it flows through the auxiliary cooling module 13 to obtain coolant that meets the target temperature through the sub-control module 17. If the coolant temperature in the cooling pool is lower than the target temperature, it controls all the coolant flowing out of the power battery 1 to flow to the cooling module 12 through the first control water valve 15 and the second control water valve 16, and controls the percentage flowing into the cooling pool to obtain coolant that meets the target temperature.

[0099] After obtaining coolant that meets the target temperature, the coolant is returned to the power battery 1.

[0100] In this embodiment, when the target temperature is lower than the water temperature of the main circuit, it indicates that cooling of the power battery 1 is required. There are two scenarios: one is that the coolant temperature in the cooling tank is higher than the water temperature of the main circuit, meaning the cooling tank does not have a cooling function; the other is that the coolant temperature in the cooling tank is lower than the water temperature of the main circuit, meaning the cooling tank has a cooling function.

[0101] When the cooling pool does not have a cooling function, the first control water valve 15 controls all the coolant output from the power battery to flow to the auxiliary cooling module 13 for cooling. After obtaining coolant that meets the target temperature, it is all sent back to the power battery. The sub-control module 17 controls the auxiliary cooling module 13 to start.

[0102] When the cooling pool has a cooling function, it is further divided into two situations: one is that the temperature of the coolant in the cooling pool is higher than the target temperature, meaning the cooling capacity of the cooling pool is insufficient; the other is that the temperature of the coolant in the cooling pool is not higher than the target temperature, meaning the cooling capacity of the cooling pool is sufficient. When the cooling capacity of the cooling pool is insufficient, the first control water valve 15 and the second control water valve 16 control all the coolant output from the power battery 1 to flow into the cooling pool. The sub-control module 17 controls the coolant output from the cooling pool to be further transported to the auxiliary cooling module 13 for further cooling. After obtaining coolant that meets the target temperature, it is all transported back to the power battery. When the cooling capacity of the cooling pool is sufficient, the proportion of coolant supplied to the cooling pool can be adjusted according to the required cooling range of the power battery 1. When the required cooling range is small, only a portion of the coolant output from the power battery 1 needs to be sent to the cooling pool, while the other portion is not sent to the cooling pool but is mixed with the coolant output from the cooling pool under the diversion of the second control water valve 16, and then all of it is sent back to the power battery 1 under the diversion of the sub-control module 17. When the required cooling range is large, all the coolant output from the power battery is sent to the cooling pool under the diversion of the second control water valve 16. At this time, the coolant output from the cooling pool has reached the target temperature, and it can be all sent back to the power battery 1 under the diversion of the sub-control module 17.

[0103] In summary, temperature control components can flexibly adjust temperature control strategies for different operating conditions, thereby improving the targeting and efficiency of temperature control.

[0104] In a preferred embodiment, the target temperature can be a temperature range.

[0105] This invention also provides a charging method with battery temperature control, comprising:

[0106] Collect the real-time remaining power of power battery 1 and process it to obtain a charging command, which includes the real-time charging power and the target power.

[0107] The real-time temperature and real-time charging power of power battery 1 during charging are collected and processed to obtain temperature control commands, including the target temperature.

[0108] Charge the power battery line 1 according to the charging instructions until the power battery line 1 reaches the target charge level;

[0109] Adjust the temperature of power battery 1 according to the temperature control command until power battery 1 reaches the target temperature;

[0110] Based on the preset temperature adjustment range, when it is determined that the target temperature exceeds the temperature adjustment range, the real-time charging power is adjusted.

[0111] The control method of this embodiment is applicable to the above-mentioned control systems.

[0112] This application is not limited to the above-described embodiments. For those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A charging system with battery temperature control, characterized in that, The system includes: A charging component is used to charge the power battery (1) according to a charging instruction, which includes real-time charging power and target capacity. A temperature control component is used to regulate the temperature of the power battery (1) according to a temperature control command, the temperature control command including a target temperature; the temperature control component includes a heating module (11) for heating each power battery by delivering coolant, a cooling module (12) for cooling, and a control module for controlling the flow rate of coolant, the cooling module (12) including a cooling pool containing coolant. The temperature control component also includes a first control water valve (15), a second control water valve (16), and a sub-control module (17). When the control module determines that the target temperature is higher than the water temperature of the main circuit and the coolant temperature in the cooling pool is higher than the water temperature of the main circuit, if the coolant temperature in the cooling pool is higher than the target temperature, it controls all the coolant flowing out of the power battery (1) to flow to the cooling module (12) through the first control water valve (15), and controls the percentage of coolant flowing into the cooling pool through the second control water valve (16) to obtain a mixed coolant that meets the target temperature. If the coolant temperature in the cooling pool is lower than the target temperature, it controls all the coolant flowing out of the power battery (1) to flow to the cooling module (17) through the first control water valve (15). 2) The percentage of coolant flowing into the cooling pool is controlled by the second control water valve (16), and the mixed coolant is further heated by the sub-control module (17) when it flows through the heating module (11) to obtain coolant that meets the target temperature. When the control module determines that the target temperature is higher than the water temperature of the main circuit and the coolant temperature in the cooling pool is lower than the water temperature of the main circuit, it controls all the coolant flowing out of the power battery (1) to flow to the heating module (11) through the first control water valve (15) to obtain coolant that meets the target temperature. All the coolant output from the power battery (1) is collected into the main circuit and then sent to the control module for judgment. After obtaining coolant that meets the target temperature, the coolant is sent back to the power battery (1). The control component is used to collect the real-time remaining power of the power battery (1) and process it to obtain the charging command; it is also used to collect the real-time temperature and real-time charging power of the power battery (1) during charging and process it to obtain the temperature control command; it is also used to adjust the real-time charging power according to the temperature adjustment range preset by the temperature control component when it is determined that the target temperature exceeds the temperature adjustment range.

2. The charging system with battery temperature control as described in claim 1, characterized in that, The control component collects the real-time remaining power and the real-time temperature through the battery management system; The charging component and the temperature control component are connected to the same socket on the power battery.

3. The charging system with battery temperature control as described in claim 1, characterized in that, The temperature control component includes: The heating module (11) is connected to a main circuit that connects to multiple power batteries (1) for heating the coolant output by the multiple power batteries (1) to obtain coolant that meets the target temperature, and then sending the coolant back to the power battery (1). The cooling module (12) is connected to the main circuit of the multiple power batteries (1), and includes a cooling pool containing coolant. It is used to adjust the temperature of the coolant output by the multiple power batteries (1), and after obtaining the coolant that meets the target temperature, the coolant is sent back to the power battery (1). The control module is used to collect the real-time temperature and real-time power of the multiple power batteries (1) during charging, and process them to obtain the target temperature of each power battery (1); the control module is also used to control the real-time flow rate of the coolant delivered by the heating module (11) and the cooling module (12) to each power battery (1).

4. The charging system with battery temperature control as described in claim 3, characterized in that, The control module includes: Multiple branch controllers (9) are used to collect the real-time temperature and real-time power of each power battery (1); they are also used to collect the temperature and flow rate of the coolant output by each power battery (1) and the temperature and flow rate of the coolant input to each power battery (1), and send the collected temperature and flow rate data to the main controller (10); they are also used to control the flow rate of the coolant input to each power battery (1) according to the flow control command of the main controller (10); each branch controller (9) corresponds to a power battery (1) one by one; The main controller (10) is used to process the real-time temperature and real-time power sent by each branch controller (9) to obtain the target control temperature of each power battery (1), and to perform average processing on the target control temperatures of all power batteries (1) to obtain the target temperature; it is also used to obtain the flow control command based on the target temperature and in combination with the real-time temperature and real-time power of each power battery (1); The branch controller (9) controls the flow rate of coolant input to the power battery (1) via the flow control water pump (14).

5. The charging system with battery temperature control as described in claim 3, characterized in that, The power battery (1) is provided with a vehicle end water outlet connector (4) for outputting coolant and a vehicle end water inlet connector (3) for receiving coolant. The control module is provided with a temperature control end water outlet connector (6) for outputting coolant and a temperature control end water inlet connector (5) for receiving coolant. The vehicle end water outlet connector (4) is connected to the vehicle cooling unit (18) through the water outlet pipe. A first quick connector (7) is provided on the water outlet pipe. When the vehicle is charging, the temperature control end water inlet connector (5) is detachably connected to the first quick connector (7). The vehicle end water inlet connector (3) is connected to the vehicle cooling unit (18) through the water inlet pipe. A second quick connector (8) is provided on the water inlet pipe. When the vehicle is charging, the temperature control end water outlet connector (6) can be detachably connected to the second quick connector (8).

6. The charging system with battery temperature control as described in claim 3, characterized in that, The temperature control component also includes: An auxiliary cooling module (13) is used to cool the coolant flowing out of the power battery (1) or the coolant flowing out of the cooling module (12).

7. The charging system with battery temperature control as described in claim 6, characterized in that, The temperature control component also includes: The first control water valve (15) is connected to the control module, the heating module (11), and the cooling module (12) respectively, and is used to control the flow of coolant from all power batteries (1) to the heating module (11) or the cooling module (12) according to the flow direction control command of the control module. The second control water valve (16) is connected to the control module and the cooling module (12) respectively. It is used to control part of the coolant flowing from the first control water valve (15) to flow to the cooling pool according to the flow direction control command of the control module, and to control another part of the coolant flowing from the first control water valve (15) to mix with the coolant flowing from the cooling pool. The sub-control module (17) is connected to the control module, the cooling module (12), the heating module (11), and the auxiliary cooling module (13) respectively. It is used to control the opening and closing of the heating module (11) and the auxiliary cooling module (13) as the coolant flowing out from the second control water valve (16) flows through the heating module (11), the auxiliary cooling module (13), and the power battery (1) in sequence, according to the flow direction control command of the control module.

8. The charging system with battery temperature control as described in claim 7, characterized in that, When the control module determines that the target temperature is lower than the water temperature of the main circuit and the temperature of the coolant in the cooling pool is higher than the water temperature of the main circuit, it controls the coolant flowing out of the power battery (1) to flow to the auxiliary cooling module (13) through the first control water valve (15) to obtain coolant that meets the target temperature. When the control module determines that the target temperature is lower than the water temperature of the main circuit and the coolant temperature in the cooling pool is lower than the water temperature of the main circuit, if the coolant temperature in the cooling pool is higher than the target temperature, it controls all the coolant flowing out of the power battery (1) to flow to the cooling module (12) through the first control water valve (15) and the second control water valve (16), and controls the coolant flowing out of the cooling module (12) to be further cooled when it flows through the auxiliary cooling module (13) to obtain coolant that meets the target temperature. If the coolant temperature in the cooling pool is lower than the target temperature, it controls all the coolant flowing out of the power battery (1) to flow to the cooling module (12) through the first control water valve (15), and controls the percentage of coolant flowing into the cooling pool through the second control water valve (16) to obtain coolant that meets the target temperature. All the coolant output from the power batteries (1) is collected in the main circuit and then sent to the control module for judgment; After obtaining coolant that meets the target temperature, the coolant is returned to the power battery (1).

9. A charging method with battery temperature control, characterized in that, The method, based on the charging system with battery temperature control according to any one of claims 1-8, comprises: The system collects the real-time remaining power of the power battery and processes it to obtain a charging command, which includes the real-time charging power and the target power. The system collects the real-time temperature and real-time charging power of the power battery during charging, and processes them to obtain temperature control commands, which include the target temperature. Charge the power battery according to the charging instructions until the power battery reaches the target capacity; The temperature of the power battery is adjusted according to the temperature control command until the power battery reaches the target temperature. Based on the preset temperature adjustment range, when it is determined that the target temperature exceeds the temperature adjustment range, the real-time charging power is adjusted.

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