Battery system, battery system control method, and medium

Abstract

The present application belongs to the field of automobile technology, and in particular relates to a battery system, a battery system control method, and a medium. The battery system includes: a battery module, which is arranged in a first branch; a warm air heating module, which is arranged in a second branch in parallel with the first branch; an intercooler, which is connected in series with the warm air heating module and is located in the second branch, and the intercooler is arranged at an upstream position of the warm air heating module; a driving module, which is used to drive the cooling medium to the first branch and the second branch; a heat dissipation module, which is connected to the battery module, and the heat dissipation module is arranged at a downstream position of the battery module; an ion exchange module, which is connected to the battery module and is used to reduce the conductivity of the cooling medium. In this way, the battery system provided by the present application does not need to add an auxiliary electronic water pump to the second branch where the warm air heating module is located to pump water, thereby reducing the energy consumption of the battery system to achieve warm air heating.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a battery system, a battery system control method, and a medium. Background Art

[0002] At present, in existing automotive fuel cell systems, the heat of the water at the outlet of the fuel cell stack is usually used to heat the warm air. The above-mentioned warm air heating method requires the addition of an additional auxiliary electronic water pump to the branch where the warm air heating module is located to pump water, which results in higher energy consumption of the automotive fuel cell system when achieving warm air heating.

[0003] Therefore, how to reduce the energy consumption of automobile fuel cell systems to achieve warm air heating is a difficult problem that urgently needs to be solved in the field of automotive technology. Summary of the Invention

[0004] The main purpose of the present invention is to provide a battery system, a battery system control method and a medium, which aims to heat the warm air gas by transferring the heat of the intercooler to the warm air heating module through the cooling medium by connecting the warm air heating module and the intercooler in series on the second branch and in parallel with the first branch where the battery module is located, thereby eliminating the need to add an auxiliary electronic water pump to pump water at the battery module outlet, thereby reducing the energy consumption of the automobile fuel cell system to achieve warm air heating.

[0005] According to one aspect of an embodiment of the present application, a battery system is disclosed, comprising:

[0006] A battery module is provided in the first branch;

[0007] a warm air heating module, provided in a second branch connected in parallel with the first branch;

[0008] an intercooler connected in series with the warm air heating module and located in the second branch, and the intercooler is arranged upstream of the warm air heating module;

[0009] a driving module, configured to drive the cooling medium to the first branch and the second branch;

[0010] a heat dissipation module connected to the battery module and disposed downstream of the battery module;

[0011] The ion exchange module is connected to the battery module and is used to reduce the conductivity of the cooling medium.

[0012] In some embodiments of the present application, based on the above technical solution, the ion exchange module is arranged in the third branch, the heat dissipation module is arranged in the fourth branch, the third branch and the fourth branch are connected in parallel, and the battery system also includes a regulating valve, which is respectively connected to the second branch, the third branch and the fourth branch, and is used to adjust the flow rate of the cooling medium corresponding to the second branch, the third branch and the fourth branch respectively.

[0013] In some embodiments of the present application, the warm air heating module includes a heater and a warm air module, the heater is connected to the warm air module, the heater is used to heat the warm air gas based on electric energy, and the warm air module is used to obtain the heat of the cooling medium and heat the warm air gas based on the heat of the cooling medium.

[0014] According to one aspect of an embodiment of the present application, a battery system control method is disclosed. The battery system control method is applied to the battery system described in the above embodiment, and the battery system control method includes:

[0015] Obtaining the operating status of the battery system;

[0016] The regulating valve is controlled to adjust the connection states of the second branch, the third branch, and the fourth branch according to the working state of the battery system to form multiple circulation loops, and the warm air is heated based on the multiple circulation loops.

[0017] In some embodiments of the present application, based on the above technical solution, the operating state of the battery system includes a power output state, and controlling the regulating valve to adjust the connection states of the second branch, the third branch, and the fourth branch according to the operating state of the battery system to form multiple circulation loops, and heating the warm air based on the multiple circulation loops includes:

[0018] When the operating state of the battery system is a power output state, controlling the regulating valve to adjust the second branch and the third branch to an open state and the fourth branch to a closed state, so that the cooling medium flows in a first circulation loop formed by the first branch, the second branch, and the third branch;

[0019] controlling the intercooler to heat the cooling medium;

[0020] The heating module is controlled to obtain heat from the cooling medium, and heats the warm air based on the heat from the cooling medium.

[0021] In some embodiments of the present application, based on the above technical solution, when the working state of the battery system is a power output state, the battery system control method further includes:

[0022] Obtaining the temperature of the cooling medium at the outlet of the battery module;

[0023] When the temperature of the cooling medium at the outlet of the battery module reaches a first preset temperature, the regulating valve is controlled to adjust the second branch and the fourth branch to an open state and the third branch to a closed state, so that the cooling medium flows in a second circulation loop formed by the first branch, the second branch and the fourth branch.

[0024] In some embodiments of the present application, based on the above technical solution, after controlling the regulating valve to adjust the second branch and the fourth branch to an open state and the third branch to a closed state, the battery system control method further includes:

[0025] When the temperature of the cooling medium at the outlet of the battery module reaches a second preset temperature, triggering a preset heat dissipation instruction, the second preset temperature being higher than the first preset temperature;

[0026] The cooling fan is controlled to start according to the preset heat dissipation instruction, and the cooling fan is arranged in the heat dissipation module.

[0027] In some embodiments of the present application, based on the above technical solution, the operating state of the battery system further includes a self-heating state, and the battery system control method further includes:

[0028] monitoring the temperature of the cooling medium at the outlet of the battery module;

[0029] If the temperature of the cooling medium at the outlet of the battery module is lower than a third preset temperature, determining that the operating state of the battery system is the self-heating state, and controlling the regulating valve to adjust the third branch to an open state and the second branch and the fourth branch to a closed state, so that the cooling medium flows in a third circulation loop formed by the first branch and the third branch, and the third preset temperature is lower than the first preset temperature;

[0030] When the temperature of the cooling medium at the outlet of the battery module reaches the third preset temperature, it is determined that the operating state of the battery system is a power output state.

[0031] In some embodiments of the present application, based on the above technical solution, after determining that the operating state of the battery system is the self-heating state, the battery system control method further includes:

[0032] triggering a preset heating instruction based on the self-heating state;

[0033] The heater is controlled to heat the warm air according to the preset heating instruction, and the heater is provided in the warm air heating module.

[0034] In some embodiments of the present application, based on the above technical solution, controlling the regulating valve to adjust the third branch to an open state includes:

[0035] Determining the opening ratio of the third branch according to a preset heat engine duration;

[0036] The regulating valve is controlled to adjust the third branch to an open state according to the opening ratio.

[0037] In some embodiments of the present application, based on the above technical solution, before obtaining the working status of the battery system, the battery system control method further includes:

[0038] detecting the operating status of the regulating valve;

[0039] If the operating state of the regulating valve is abnormal, the battery system is controlled to shut down.

[0040] In some embodiments of the present application, based on the above technical solution, after detecting the operating state of the regulating valve, the battery system control method further includes:

[0041] If the operating state of the regulating valve is normal, detecting the operating state of the temperature sensor, wherein the temperature sensor is provided in the first branch and the fourth branch, and is used to monitor the temperature of the cooling medium at the outlet of the battery module and the outlet of the heat dissipation module respectively;

[0042] If the operating state of the temperature sensor is abnormal, the regulating valve is controlled to adjust the fourth branch to an open state, and an alarm operation is performed.

[0043] In some embodiments of the present application, based on the above technical solution, after detecting the operating status of the temperature sensor, the battery system control method further includes:

[0044] If the operating state of the temperature sensor is normal, determining a preset control strategy according to the operating parameters of the battery system;

[0045] determining a first operating mode corresponding to the driving module according to the preset control strategy, so as to adjust the flow rate of the cooling medium of the second branch based on the first operating mode; and / or,

[0046] A second operating mode corresponding to the regulating valve is determined according to the preset control strategy, so as to adjust the flow rate of the cooling medium in the first branch based on the second operating mode.

[0047] According to one aspect of an embodiment of the present application, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the battery system control method described in the above technical solution.

[0048] The battery system provided in the present application arranges the warm air heating module and the intercooler in series in the second branch, and in parallel with the first branch where the battery module is located. In actual application, the cooling medium of the battery system is driven by the driving module to the first branch and the second branch, wherein the cooling medium of the second branch obtains heat through the intercooler and transfers the heat to the warm air heating module, and the warm air heating module heats the warm air gas based on the heat of the cooling medium.

[0049] In this way, in the battery system provided in the present application, the intercooler's heating effect on the cooling medium is equivalent to the battery module's heating effect on the cooling medium, which can ensure that the cooling medium reaches a temperature level for achieving warm air heating when passing through the warm air heating module. Since the resistance of the first branch and the second branch is not much different, there is no need to add an auxiliary electronic water pump to the second branch where the warm air heating module is located to pump water, thereby reducing the energy consumption of the battery system for achieving warm air heating.

[0050] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0052] Figure 1 A schematic diagram of the structure of a conventional automotive fuel cell system in one embodiment of the present application is shown. Reference numerals: battery system 1000, battery module 100, heater module 200, heater core 201, heater 202, intercooler 300, drive module 400, heat dissipation module 500, ion exchange module 600, regulating valve 700.

[0053] Figure 2 A schematic structural diagram of a battery system in one embodiment of the present application is shown.

[0054] Figure 3A flowchart of the steps of a battery system control method in one embodiment of the present application is shown.

[0055] Figure 4 A schematic diagram showing a state in which a battery system forms a first circulation loop in one embodiment of the present application is shown.

[0056] Figure 5 A schematic diagram showing a state in which a battery system forms a second circulation loop in one embodiment of the present application is shown.

[0057] Figure 6 A schematic diagram showing a state in which a battery system forms a third circulation loop in one embodiment of the present application is shown.

[0058] Figure 7 The application flow chart of the battery system control method in one embodiment of the present application is shown. DETAILED DESCRIPTION

[0059] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0060] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner.In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps etc. can be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0061] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0062] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0063] It should be noted that the battery fuel system of existing automobiles usually uses the heat of the water at the outlet of the fuel cell stack to heat the warm air. The above-mentioned warm air heating method requires the addition of an additional auxiliary electronic water pump to the branch where the warm air heating module is located to pump water, which results in higher energy consumption of the automobile fuel cell system when achieving warm air heating.

[0064] Figure 1 FIG. 1 shows a schematic diagram of the structure of the battery fuel system of the above-mentioned conventional automobile. Figure 1 As shown, the high-temperature water at the outlet of the fuel cell stack is diverted through a three-way valve, part of which flows into the branch where the heater core is located, and part is connected to the drain pipe for discharge. Since the water resistance of the drain pipe is small, an electronic water pump is required to pump water into the branch where the heater core is located to achieve the purpose of warm air heating, thereby increasing the energy consumption of the battery fuel system.

[0065] In order to solve the above problems, Figure 2 As shown, one embodiment of the present application provides a battery system 1000, wherein the battery system 1000 includes:

[0066] The battery module 100 is provided in the first branch;

[0067] The warm air heating module 200 is provided in the second branch connected in parallel with the first branch;

[0068] an intercooler 300 connected in series with the warm air heating module 200 and located in the second branch, and the intercooler 300 is located upstream of the warm air heating module 200;

[0069] A driving module 400, configured to drive the cooling medium to the first branch and the second branch;

[0070] a heat dissipation module 500 connected to the battery module 100 and disposed downstream of the battery module 100;

[0071] The ion exchange module 600 is connected to the battery module 100 and is used to reduce the conductivity of the cooling medium.

[0072] The battery system 1000 provided in the present application has a warm air heating module 200 and an intercooler 300 connected in series in the second branch, and in parallel with the first branch where the battery module 100 is located. In actual application, the cooling medium of the battery system 1000 is driven by the driving module 400 to the first branch and the second branch, wherein the cooling medium of the second branch obtains heat through the intercooler 300 and transfers the heat to the warm air heating module 200, and the warm air heating module 200 heats the warm air gas based on the heat of the cooling medium.

[0073] Specifically, for the fuel cell system of a car, its working water temperature is usually maintained at 60℃-80℃, while the working water temperature of the intercooler 300 is required not to exceed 75℃. When installed on the whole vehicle, the working water temperature of the intercooler 300 is close to the heating requirement temperature of the warm air gas. That is to say, after the cooling medium is heated by the intercooler 300, the heat is transferred to the warm air core 201 through the cooling medium to heat the warm air gas, which can actually meet the heating demand of the warm air gas. Therefore, the heat required for heating the warm air gas does not necessarily need to be taken from the battery module 100, that is, the battery stack; on this basis, the heater core 201 and the intercooler 300 are connected in parallel to realize the function of heating the warm air gas, and there is no need to set an additional branch at the outlet of the battery stack to set up the heater core 201, and to add an electronic water pump to the additional branch to pump water to the heater core 201.

[0074] In the present application, the stack cooling circuit, the water-cooled intercooler circuit and the air-conditioning warm air circuit are matched and designed. The intercooler 300 has a heating effect on the cooling medium that is equivalent to the heating effect of the battery module 100 on the cooling medium, and can ensure that the cooling medium reaches a temperature level for warm air heating when passing through the warm air heating module 200. Since the resistance of the first branch and the second branch is not much different, there is no need to add an auxiliary electronic water pump to the second branch where the warm air heating module 200 is located for pumping water, thereby reducing the energy consumption of the battery system 1000 for warm air heating, and also reducing the structural complexity of the battery system 1000.

[0075] Furthermore, the ion exchange module 600 is arranged in the third branch, the heat dissipation module 500 is arranged in the fourth branch, the third branch and the fourth branch are connected in parallel, and the battery system 1000 also includes a regulating valve 700, which is respectively connected to the second branch, the third branch and the fourth branch, and is used to adjust the flow rate of the cooling medium corresponding to the second branch, the third branch and the fourth branch respectively.

[0076] In this embodiment, the ion exchange module 600 for reducing the ion content of the cooling medium and the heat dissipation module 500 for cooling the cooling medium are respectively arranged in two parallel branches, and the flow of the two parallel branches is regulated by the regulating valve 700 to adapt to different working conditions of the battery system 1000.

[0077] As a feasible embodiment, for example, when the battery system 1000 is just started and needs to be heated up, there is no need to cool down the water used to cool the battery stack of the battery system 1000. The regulating valve 700 is controlled to close the fourth branch where the heat dissipation module 500 is located, so that the water of the battery system 1000 is circulated only through the third branch where the deionization exchanger is provided. This ensures that the ion content of the water is at a lower level while quickly raising the water temperature to achieve the purpose of rapid heating of the battery system 1000.

[0078] As a feasible embodiment, for example, when the water used to cool the battery stack in the battery system 1000 reaches a higher temperature, the water needs to be cooled to avoid overheating of the entire battery system 1000. The regulating valve 700 is controlled to open the fourth branch where the heat dissipation module 500 is located, so that the higher temperature water at the outlet of the battery stack circulates through the fourth branch where the heat dissipation module 500 is provided, thereby cooling the higher temperature water through the heat dissipation module 500.

[0079] Furthermore, the warm air heating module 200 includes a heater 202 and a warm air module, the heater 202 is connected to the warm air module, the heater 202 is used to heat the warm air gas based on electric energy, and the warm air module is used to obtain the heat of the cooling medium and heat the warm air gas based on the heat of the cooling medium.

[0080] Specifically, the heater module includes a heater core 201. In actual application, when the cooling medium of the battery system 1000 is heated by the intercooler 300, the heater core 201 obtains the heat of the heated cooling medium and heats the warm air gas; when the temperature of the cooling medium does not reach the required heat for the heater core 201, the heater 202 converts electrical energy into thermal energy to heat the warm air gas. In this way, the heater heating module 200 includes a heater core 201 and a heater 202, which can heat the warm air gas based on the different states of the battery system 1000.

[0081] As a feasible embodiment, for example, when the battery system 1000 is just started and needs to be heated, the temperature of the water used to cool the battery stack of the battery system 1000 is relatively low. Even if it passes through the intercooler 300, the water temperature is difficult to reach a level that provides heat for the heater core 201 to heat the warm air gas. At this time, it is necessary to control the heater 202 to heat the warm air gas based on electrical energy so that the car can provide warm air that meets user needs.

[0082] As a feasible embodiment, for example, when the battery system 1000 is in the power output stage, the temperature of the water in the battery system 1000 is relatively high, and after the water passes through the intercooler 300, the water temperature is sufficient to provide heat to the heater core 201 to heat the warm air gas. Therefore, it is sufficient to control the heater core 201 to obtain the heat of the water to heat the warm air gas, without using the heater 202.

[0083] like Figure 3 As shown, another embodiment of the present application provides a battery system control method, which is applied to the battery system provided by the above embodiment, and includes the following steps S100 and S200.

[0084] Step S100: Acquire the working status of the battery system.

[0085] In step S200 , the regulating valve is controlled to adjust the connection states of the second branch, the third branch, and the fourth branch according to the working state of the battery system to form multiple circulation loops, and the warm air is heated based on the multiple circulation loops.

[0086] Specifically, according to the different working states of the battery system, such as the battery system is in a self-heating state requiring a corresponding heat engine, or a power output state of normal power generation to maintain the operation of the vehicle, the control regulating valve adjusts the connection state of the second branch, the third branch and the fourth branch, thereby forming different circulation loops, thereby meeting the heating or heat dissipation requirements of the working state of the battery system while realizing the heating function of the warm air gas.

[0087] Furthermore, based on the above embodiments, the working state of the battery system includes a power output state. The above step S200 controls the regulating valve to adjust the connection state of the second branch, the third branch and the fourth branch according to the working state of the battery system to form multiple circulation loops, and heats the warm air gas based on the multiple circulation loops, including the following steps S201 to S203.

[0088] Step S201, when the operating state of the battery system is the power output state, the regulating valve is controlled to adjust the second branch and the third branch to the open state, and the fourth branch to the closed state, so that the cooling medium flows in the first circulation loop formed by the first branch, the second branch and the third branch.

[0089] Specifically, if Figure 4As shown, when the battery system operates normally and outputs power to drive the entire vehicle, the working state of the battery system is the power output state, and the control valve adjusts the second branch provided with the warm air heating module and the third branch provided with the ion exchange module to the open state, and adjusts the fourth branch provided with the heat dissipation module to the closed state.

[0090] In actual applications, the water used to cool the fuel cell stack is driven by an electronic water pump to the first branch where the fuel cell stack is located and the second branch where the heat dissipation module is located. That is, part of the water is used to cool the fuel cell stack, and part of the water is used to transfer the heat generated by the intercooler to the heater core to heat the warm air. The water in the first and second branches then passes through a regulating valve and a third branch where a deionizer is located to reduce the ion content of the water. In this way, the water used to cool the fuel cell stack flows in a first circulation loop formed by the first, second, and third branches. In this embodiment, the water used to cool the fuel cell stack does not need to be cooled by the heat dissipation module located in the fourth branch and will not circulate through the fourth branch.

[0091] Step S202: controlling the intercooler to heat the cooling medium.

[0092] Specifically, when the cooling system of the battery system flows based on the first circulation loop, the intercooler is controlled to heat the cooling medium of the second branch based on the heat obtained when cooling the air.

[0093] Step S203 : controlling the heating module to obtain the heat of the cooling medium, and heating the warm air based on the heat of the cooling medium.

[0094] Specifically, after the cooling medium of the second branch is heated by the intercooler, the heating module is controlled to obtain heat from the heated cooling medium and heat the warm air.

[0095] As a feasible embodiment, after the water in the second branch is heated by the intercooler, the heater core is controlled to obtain the heat of the heated water and heat the heater gas.

[0096] Furthermore, based on the above embodiment, when the working state of the battery system is the power output state, the battery system control method further includes the following steps S301 and S302.

[0097] Step S301 : obtaining the temperature of the cooling medium at the outlet of the battery module.

[0098] Specifically, a temperature sensor is provided at the outlet of the battery module of the first branch, and the temperature of the cooling medium at the outlet of the battery module is monitored by the temperature sensor.

[0099] Step S302: When the temperature of the cooling medium at the outlet of the battery module reaches a first preset temperature, the regulating valve is controlled to adjust the second branch and the fourth branch to an open state and the third branch to a closed state, so that the cooling medium flows in a second circulation loop formed by the first branch, the second branch, and the fourth branch.

[0100] Specifically, if Figure 5 As shown, when the temperature of the cooling medium at the outlet of the battery module reaches the first preset temperature at which a cooling operation needs to be performed, in order to avoid overheating of the battery system, the control valve adjusts the second branch provided with the warm air heating module and the fourth branch provided with the heat dissipation module to the open state, and the third branch provided with the ion exchange module to the closed state. At this time, the cooling medium of the battery system no longer passes through the third branch, but flows in the second circulation loop formed by the first branch, the second branch and the fourth branch, and is cooled by the heat dissipation module provided in the fourth branch.

[0101] Further, based on the above embodiment, after controlling the regulating valve to adjust the second branch and the fourth branch to an open state and the third branch to a closed state in the above step S302, the battery system control method further includes the following steps S303 and S304.

[0102] Step S303 : When the temperature of the cooling medium at the outlet of the battery module reaches a second preset temperature, a preset heat dissipation instruction is triggered, where the second preset temperature is higher than the first preset temperature.

[0103] Step S304 : controlling a cooling fan to start according to the preset heat dissipation instruction, wherein the cooling fan is provided in the heat dissipation module.

[0104] Specifically, in this embodiment, the heat dissipation module includes a heat dissipation component provided with a heat sink and a cooling fan. When the temperature of the cooling medium at the outlet of the battery module reaches a second preset temperature, cooling the cooling medium only by the heat dissipation component cannot fully meet the cooling requirements of the battery system. Therefore, the preset heat dissipation instruction is triggered, and the cooling fan is controlled to start according to the preset heat dissipation instruction, and the operating power of the cooling fan is adjusted, thereby further improving the cooling effect of the cooling medium.

[0105] In another feasible embodiment, a temperature sensor is provided at a downstream position of the heat dissipation module in the fourth branch to monitor the temperature of the cooled cooling medium. When the temperature of the cooled cooling medium is higher than the preset cooling temperature, it is determined that cooling the cooling medium only by the heat dissipation component cannot fully meet the cooling requirement of the battery system. Therefore, the preset heat dissipation instruction is triggered, and the cooling fan is controlled to start according to the preset heat dissipation instruction, and the operating power of the cooling fan is adjusted, thereby further improving the cooling effect on the cooling medium.

[0106] Furthermore, based on the above embodiment, the working state of the battery system further includes a self-heating state, and the battery system control method further includes the following steps S401 to S403.

[0107] Step S401 : monitoring the temperature of the cooling medium at the outlet of the battery module.

[0108] In step S402, if the temperature of the cooling medium at the outlet of the battery module is lower than the third preset temperature, the operating state of the battery system is determined to be the self-heating state, and the regulating valve is controlled to adjust the third branch to an open state, and the second branch and the fourth branch to a closed state, so that the cooling medium flows in a third circulation loop formed by the first branch and the third branch, and the third preset temperature is lower than the first preset temperature.

[0109] Step S403 : When the temperature of the cooling medium at the outlet of the battery module reaches the third preset temperature, it is determined that the operating state of the battery system is a power output state.

[0110] Specifically, if Figure 6 As shown, when the battery module enters the normal working mode, the battery module does not output power to the outside in the initial stage, but is in a self-heating state requiring a heat engine. At this time, the temperature of the cooling medium in the battery system is lower than that in the power output stage. In order to enable the battery system to complete the heat engine in a shorter time, the control regulating valve adjusts the third branch provided with the off-exchange module to the open state, and the second branch provided with the warm air heating module and the third branch provided with the heat dissipation module to the closed state, so that the cooling medium flows in the third circulation loop formed by only the first branch and the third branch. Since the length of the third circulation loop is shorter than that of the first circulation loop, the cooling medium will not pass through the heat dissipation module, so it can meet the rapid heat engine requirements of the battery system. When the temperature of the cooling medium reaches the third preset temperature at which the battery system can output power to the outside, the working state of the battery system is converted from the self-heating state to the power output state, and the control regulating valve is controlled to adjust the connection states of the second branch, the third branch and the fourth branch accordingly.

[0111] Further, based on the above embodiment, after determining in the above step S403 that the working state of the battery system is the self-heating state, the battery system control method further includes the following steps S404 and S405.

[0112] Step S404: triggering a preset heating instruction based on the self-heating state.

[0113] Step S405 : controlling the heater to heat the warm air according to the preset heating instruction, wherein the heater is provided in the warm air heating module.

[0114] Specifically, when the battery system is in the self-heating state, since the cooling medium does not pass through the second branch, the heater core in the heater heating module cannot obtain the heat of the cooling medium to heat the warm air gas. On this basis, a preset heating instruction is generated through automatic system triggering or user active triggering, and the heater is controlled according to the preset heating instruction to heat the warm air gas based on electric energy, so that the car can provide warm air that meets user needs.

[0115] Further, based on the above embodiment, controlling the regulating valve to adjust the third branch to an open state in the above step S402 includes the following steps S4021 and S4022.

[0116] Step S4021: determining the opening ratio of the third branch according to a preset warm-up time.

[0117] Step S4022: Control the regulating valve to adjust the third branch to an open state according to the opening ratio.

[0118] Specifically, when the battery system is in a self-heating state, in order to ensure that the temperature inside the battery module rises rapidly to meet the needs of rapid thermal engine, it is necessary to reduce the circulation rate of the cooling medium. At this time, the opening ratio of the third branch is adjusted by controlling the regulating valve, and the third branch is slightly opened to reduce the circulation rate of the cooling medium. The opening ratio of the above-mentioned third branch is determined according to the preset thermal engine time. It can be understood that the preset thermal engine time is negatively correlated with the opening ratio of the above-mentioned third branch. If the thermal engine needs to be achieved faster, the opening ratio of the third branch will be smaller.

[0119] As a feasible embodiment, the opening ratio of the third branch is 10%-20%.

[0120] Furthermore, based on the above embodiment, before obtaining the working status of the battery system in the above step S100, the battery system control method further includes the following steps S501 and S502.

[0121] Step S501: detecting the operating status of the regulating valve.

[0122] Step S502: If the operating state of the regulating valve is abnormal, the battery system is controlled to shut down.

[0123] Specifically, when the vehicle is powered on, the battery system starts self-testing. The self-test process mainly focuses on the operating status of the regulating valve. By controlling the regulating valve to start and then perform self-learning of the fully closed position, it detects whether the regulating valve can normally adjust the connection status of each branch.

[0124] It is understandable that if the regulating valve is stuck in the fully closed position, the entire battery system will be shut down and lose flow, and the cooling system will be at risk of overheating. Moreover, since the internal hot water of the battery system will not flow to the outside, the external temperature sensor cannot correctly sense the internal hot water of the battery system, resulting in the inability to perform effective monitoring. Therefore, when the regulating valve is stuck or has other faults, the battery system will be controlled to shut down.

[0125] Further, based on the above embodiment, after detecting the operating status of the regulating valve in the above step S501, the battery system control method further includes the following steps S503 and S504.

[0126] In step S503, if the operating status of the regulating valve is normal, the operating status of the temperature sensor is detected. The temperature sensor is provided in the first branch and the fourth branch, and is used to monitor the temperature of the cooling medium corresponding to the outlet of the battery module and the outlet of the heat dissipation module respectively.

[0127] Step S504: If the operating state of the temperature sensor is abnormal, control the regulating valve to adjust the fourth branch to an open state, and perform an alarm operation.

[0128] Specifically, when the battery system detects that the operating status of the regulating valve is normal, that is, the regulating valve can move normally to adjust the status of each branch, it further detects the temperature sensors provided in the first branch and the fourth branch. If the temperature sensor is unable to sense the temperature of the cooling medium due to a fault, the battery system performs an alarm operation to remind the user to deal with it in time, and at the same time controls the regulating valve to adjust the fourth branch to an open state, so as to cool the cooling medium through the heat dissipation module provided in the fourth branch, thereby avoiding overheating of the battery system, or controls the regulating valve to adjust all branches to an open state, so that the cooling medium can flow based on the circulation loop formed by multiple branches, thereby improving the cooling effect on the battery module by improving the circulation efficiency of the cooling medium.

[0129] Furthermore, based on the above embodiment, after detecting the operating status of the temperature sensor in the above step S503, the battery system control method further includes the following steps S505 to S507.

[0130] Step S505 : If the operating status of the temperature sensor is normal, a preset control strategy is determined according to the operating parameters of the battery system.

[0131] Step S506 : determining a first operating mode corresponding to the driving module according to the preset control strategy, so as to adjust the flow rate of the cooling medium in the second branch based on the first operating mode.

[0132] Step S507 : determining a second operating mode corresponding to the regulating valve according to the preset control strategy, so as to adjust the flow rate of the cooling medium in the first branch based on the second operating mode.

[0133] Specifically, if the battery system detects that the operating status of the temperature sensor is normal, the current temperature value of the cooling medium is obtained through the temperature sensor, and a check is made to see whether the battery system is in a working power generation state. The specific process is to obtain the output current of the battery system. If the output current is not zero, it indicates that the battery system is in a working power generation state.

[0134] During this process, the battery system sends the current target required temperature to the vehicle control system VCU based on the operating temperature under different working conditions and the target temperature difference between the cooling medium entering the battery module and leaving the battery module, thereby controlling the temperature of the cooling medium before entering the battery module by controlling the regulating valve and cooling fan, and controlling the speed of the drive module, that is, the electronic water pump, to meet the above-mentioned target temperature difference requirement of the cooling medium.

[0135] Figure 7 The following is an application flow chart of a battery system control method according to an embodiment of the present application. Figure 7 Parameter description: Heater valve threshold T_thres_heater, stack thermal threshold T_thres_FC1, stack high temperature threshold T_thres_FC2, overheat threshold T_thres_FC3. Cooling fan speed Fan_spd, regulating valve opening TMM_pos.

[0136] like Figure 7 As shown, the battery system control method of this embodiment includes steps S701 to S704.

[0137] In step S701, after the stack is started, the temperature sensor is controlled to obtain the current water temperature T1 of the battery system. The opening ratio of the third branch is determined based on the comparison between the current water temperature T1 and the stack thermal engine threshold T_thres_FC1. The circulation loop formed by the first and third branches is the V1 small loop. If the current water temperature T1 is less than the stack thermal engine threshold T_thres_FC1, the battery system has not yet completed thermal engine operation, so the third branch is opened at a smaller ratio.

[0138] In step S702, if the current water temperature T1 is greater than the stack thermal engine threshold T_thres_FC1, the opening ratio of the third branch is determined to be 100%, and further, based on the comparison relationship between the current water temperature T1 and the stack high temperature threshold T_thres_FC2, it is determined whether the fourth branch equipped with a heat dissipation module needs to be opened for heat dissipation.

[0139] In step S703, if the current water temperature T1 is less than the stack high temperature threshold T_thres_FC2, the fourth branch is not opened, and a comparison between the current water temperature T1 and the heater valve threshold T_thres_heater is used to determine whether to open the second branch equipped with the heater heating module for warm air heating. If the current water temperature T1 is greater than the heater valve threshold T_thres_heater, the second branch is opened to heat the water through the intercooler provided in the second branch, and then heat the warm air through the heater core. If the current water temperature T1 is less than the heater valve threshold T_thres_heater, the second branch is not opened, so that the battery system water continues to flow in the V1 small loop formed by the first and third branches.

[0140] In step S704, if the current water temperature T1 is greater than the stack high temperature threshold T_thres_FC2, the fourth branch of the heat dissipation module is activated for heat dissipation. A comparison between the current water temperature T1 and the overheating threshold T_thres_FC3 determines whether to activate the cooling fan provided in the heat dissipation module. If the current water temperature T1 is less than the overheating threshold T_thres_FC3, the cooling fan does not need to be activated. If the current water temperature T1 is greater than the overheating threshold T_thres_FC3, the cooling fan is activated, and the cooling fan speed Fan_spd is determined by the water temperature T1. That is, the higher the water temperature T1, the higher the cooling fan speed Fan_spd. Furthermore, the regulating valve opening TMM_pos is positively correlated with the water temperature T1. That is, the higher the water temperature T1, the greater the regulating valve opening TMM_pos. This increases the water circulation speed to achieve a cooling effect.

[0141] In particular, according to embodiments of the present application, the processes described in the various method flow charts can be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including program code for executing the methods shown in the flow charts. In such embodiments, when the computer program is executed by a processor, the various functions defined in the system of the present application are performed.

[0142] It should be noted that the computer-readable medium shown in the embodiments of the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or component, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, or any suitable combination thereof.

[0143] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the above-mentioned module, program segment, or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of the boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0144] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiment of the application, the features and functions of two or more modules or units described above can be concretized in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be concretized.

[0145] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiments of the present application.

[0146] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed herein.

[0147] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A battery system, characterized in that: The battery system comprises: A battery module is provided in the first branch; a warm air heating module, provided in a second branch connected in parallel with the first branch; an intercooler connected in series with the warm air heating module and located in the second branch, and the intercooler is provided upstream of the warm air heating module, so that the cooling medium in the second branch obtains heat through the intercooler and transfers the heat to the warm air heating module, and the warm air heating module heats the warm air based on the heat of the cooling medium; a driving module, configured to drive the cooling medium to the first branch and the second branch; a heat dissipation module connected to the battery module and disposed downstream of the battery module; The ion exchange module is connected to the battery module and is used to reduce the conductivity of the cooling medium.

2. The battery system according to claim 1, wherein: The ion exchange module is arranged in the third branch, the heat dissipation module is arranged in the fourth branch, the third branch and the fourth branch are connected in parallel, and the battery system also includes a regulating valve, which is respectively connected to the second branch, the third branch and the fourth branch, and is used to adjust the flow rate of the cooling medium corresponding to the second branch, the third branch and the fourth branch respectively.

3. The battery system according to claim 1, wherein: The warm air heating module includes a heater and a warm air module. The heater is connected to the warm air module. The heater is used to heat the warm air gas based on electric energy. The warm air module is used to obtain the heat of the cooling medium and heat the warm air gas based on the heat of the cooling medium.

4. A battery system control method, characterized in that: The battery system control method is applied to the battery system according to claim 1, and the battery system control method includes: Obtaining the operating status of the battery system; The regulating valve is controlled to adjust the connection states of the second branch, the third branch, and the fourth branch according to the working state of the battery system to form multiple circulation loops, and the warm air is heated based on the multiple circulation loops.

5. The battery system control method according to claim 4, wherein: The operating state of the battery system includes a power output state, and controlling the regulating valve to adjust the connection states of the second branch, the third branch, and the fourth branch to form multiple circulation loops according to the operating state of the battery system, and heating the warm air based on the multiple circulation loops, including: When the operating state of the battery system is a power output state, controlling the regulating valve to adjust the second branch and the third branch to an open state and the fourth branch to a closed state, so that the cooling medium flows in a first circulation loop formed by the first branch, the second branch, and the third branch; controlling the intercooler to heat the cooling medium; The heating module is controlled to obtain heat from the cooling medium and heat the heating gas based on the heat from the cooling medium.

6. The battery system control method according to claim 5, wherein: When the operating state of the battery system is a power output state, the battery system control method further includes: Obtaining the temperature of the cooling medium at the outlet of the battery module; When the temperature of the cooling medium at the outlet of the battery module reaches a first preset temperature, the regulating valve is controlled to adjust the second branch and the fourth branch to an open state and the third branch to a closed state, so that the cooling medium flows in a second circulation loop formed by the first branch, the second branch and the fourth branch.

7. The battery system control method according to claim 6, wherein: After controlling the regulating valve to adjust the second branch and the fourth branch to an open state and the third branch to a closed state, the battery system control method further includes: When the temperature of the cooling medium at the outlet of the battery module reaches a second preset temperature, triggering a preset heat dissipation instruction, the second preset temperature being higher than the first preset temperature; The cooling fan is controlled to start according to the preset heat dissipation instruction, and the cooling fan is arranged in the heat dissipation module.

8. The battery system control method according to claim 5, wherein: The operating state of the battery system further includes a self-heating state, and the battery system control method further includes: monitoring the temperature of the cooling medium at the outlet of the battery module; If the temperature of the cooling medium at the outlet of the battery module is lower than a third preset temperature, determining that the operating state of the battery system is the self-heating state, and controlling the regulating valve to adjust the third branch to an open state and the second branch and the fourth branch to a closed state, so that the cooling medium flows in a third circulation loop formed by the first branch and the third branch, and the third preset temperature is lower than the first preset temperature; When the temperature of the cooling medium at the outlet of the battery module reaches the third preset temperature, it is determined that the operating state of the battery system is a power output state.

9. The battery system control method according to claim 8, wherein: After determining that the operating state of the battery system is the self-heating state, the battery system control method further includes: triggering a preset heating instruction based on the self-heating state; The heater is controlled to heat the warm air according to the preset heating instruction, and the heater is provided in the warm air heating module.

10. The battery system control method according to claim 8, wherein: Controlling the regulating valve to adjust the third branch to an open state includes: Determining the opening ratio of the third branch according to a preset heat engine duration; The regulating valve is controlled to adjust the third branch to an open state according to the opening ratio.

11. The battery system control method according to claim 4, wherein: Before obtaining the operating status of the battery system, the battery system control method further includes: detecting the operating status of the regulating valve; If the operating state of the regulating valve is abnormal, the battery system is controlled to shut down.

12. The battery system control method according to claim 11, wherein: After detecting the operating state of the regulating valve, the battery system control method further includes: If the operating state of the regulating valve is normal, detecting the operating state of the temperature sensor, wherein the temperature sensor is provided in the first branch and the fourth branch, and is used to monitor the temperature of the cooling medium at the outlet of the battery module and the outlet of the heat dissipation module respectively; If the operating state of the temperature sensor is abnormal, the regulating valve is controlled to adjust the fourth branch to an open state, and an alarm operation is performed.

13. The battery system control method according to claim 12, wherein: After detecting the operating state of the temperature sensor, the battery system control method further includes: If the operating state of the temperature sensor is normal, determining a preset control strategy according to the operating parameters of the battery system; determining a first operating mode corresponding to the driving module according to the preset control strategy, so as to adjust the flow rate of the cooling medium of the second branch based on the first operating mode; and / or, A second operating mode corresponding to the regulating valve is determined according to the preset control strategy, so as to adjust the flow rate of the cooling medium in the first branch based on the second operating mode.

14. A storage medium, characterized in that The storage medium stores a computer program, which, when executed by a processor, implements the battery system control method according to any one of claims 4 to 13.

Images