Air conditioning system control method and system based on battery stack state

Abstract

The invention relates to the technical field of temperature control of energy storage equipment, in particular to an air conditioning system control method and system based on a battery stack state. The method comprises the following steps: acquiring a use habit of a user for a cell stack and a current temperature of the cell stack; the use habits comprise a plurality of use stages with different operation durations corresponding to the time axis of the day; the cell stack is in different working states in each use stage; the working state comprises a standing state and a running state; under the condition that the current temperature exceeds the first preset temperature interval, whether the temperature of the cell stack exceeds a second preset temperature interval or not is judged based on the current use stage of the cell stack and the corresponding operation duration; if yes, the air conditioning system is controlled to act, and the current temperature of the cell stack is controlled within a first preset temperature interval; according to the method, the temperature of the energy storage equipment can be accurately regulated and controlled according to the state of the cell stack, and the power loss of the temperature control equipment caused by temperature change lag is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of temperature control of energy storage equipment, and in particular to a method and system for controlling an air conditioning system based on a battery stack state. Background Art

[0002] Energy storage equipment is a device used to store electrical energy. It can store electrical energy when the power is sufficient and release electrical energy when the power is insufficient. It not only plays a significant role in the stability of the power grid, but can also be used as a backup power source. Energy storage equipment is usually composed of battery stacks, battery management systems, inverters, and temperature control systems. The temperature control system can regulate the temperature inside the energy storage device to ensure that the battery stack works within the optimal temperature range, thereby improving battery efficiency and slowing down battery aging.

[0003] The temperature control system is a high-energy-consuming device in the energy storage device. It often only uses the temperature of the energy storage device as a control indicator. However, the change in temperature often has a lag. Therefore, this control method ignores the working status of the energy storage device and only uses the lagged temperature as a control indicator, which has a large error and will lead to energy loss. Summary of the invention

[0004] Based on this, it is necessary to provide an air conditioning system control method and system based on the battery stack status to address the above technical issues.

[0005] In a first aspect, the present application proposes a method for controlling an air conditioning system based on a battery stack state, comprising:

[0006] Obtaining the user's usage habits of the battery stack and the current temperature of the battery stack; the usage habits include multiple usage stages with different operating durations corresponding to the time axis of the day; the battery stack is in different working states in each usage stage; the working state includes a static state and a running state;

[0007] When the current temperature exceeds the first preset temperature range, it is determined whether the battery stack will exceed the second preset temperature range based on the current usage stage of the battery stack and the corresponding operating time; if so, the air-conditioning system is controlled to control the current temperature of the battery stack within the first preset temperature range.

[0008] In one embodiment, the air conditioning system includes a coil disposed around and in contact with the battery stack, a circulating water pump connected to the coil, and a cooling device and a heating device respectively disposed at a water outlet of the circulating water pump; the method further includes:

[0009] When the temperature of the battery stack exceeds the first preset temperature range and is judged not to exceed the second preset temperature range, the circulating water pump is controlled to be turned on, and the cooling device and the heating device are turned off;

[0010] When the temperature of the battery stack reaches the upper limit of the first preset temperature range and is judged to exceed the second preset temperature range, the circulating water pump and the cooling device are controlled to be turned on and the heating device is turned off;

[0011] When the temperature of the battery stack reaches the lower limit of the first preset temperature range and is judged to exceed the second preset temperature range, the circulating water pump and the heating device are controlled to be in the on state and the cooling device is in the off state.

[0012] In one embodiment, the operating state includes a charging state; and the method further comprises:

[0013] Obtaining the current power of the battery stack, and when the battery stack is in a charging state and the current power is less than a first preset power, controlling the circulating water pump and the cooling device to be in an on state and the heating device to be in an off state;

[0014] When the battery stack is in a charging state and the current power is greater than a first preset power and less than a second preset power, the circulating water pump is controlled to be in an on state, and the cooling device and the heating device are in an off state;

[0015] When the battery stack is in a charging state and the current power level is greater than a second preset power level, the air conditioning system is controlled to be in a standby state.

[0016] In one embodiment, the operating state further includes a discharging state; and the method further includes:

[0017] When the battery stack is in a discharging state, obtaining the discharge power of the battery stack;

[0018] According to the operating time, discharge power and current power corresponding to the current usage stage, determine whether the battery stack can enter the next usage stage in advance; if so, then when the current power is less than the third preset power, control the circulating water pump to be in the on state, and the cooling device and the heating device to be in the off state; if not, then when the current power is not less than the third preset power, control the circulating water pump and the cooling device to be in the on state, and the heating device to be in the off state.

[0019] In one embodiment, based on the current use stage of the battery stack and the corresponding operation time, the step of determining whether the battery stack will exceed the second preset temperature range includes:

[0020] Obtaining the charging power and discharging power of the battery stack at preset time intervals, and obtaining the ambient temperature of the battery stack;

[0021] Calling historical data to determine a first correspondence between charging power, charging time, ambient temperature, and battery stack temperature, and determining a second correspondence between discharging power, discharging time, ambient temperature, and battery stack temperature;

[0022] When the battery stack is in a charging state, a change trend of the charging power of the battery stack is obtained according to each charging power, and based on the first corresponding relationship, the change trend of the charging power and the running time of the current use stage, it is judged whether the battery stack will exceed a second preset temperature range;

[0023] In the discharge state, the change trend of the battery stack discharge power is obtained according to each discharge power, and based on the second corresponding relationship, the change trend of the discharge power and the operating time of the current use stage, it is judged whether the battery stack will exceed the second preset temperature range.

[0024] In one embodiment, the step of controlling the air conditioning system to control the current temperature of the battery stack within a first preset temperature range includes:

[0025] Get the outlet water temperature of the circulating water pump;

[0026] When the cooling device or the heating device is turned on, the power of the cooling device or the heating device is controlled to keep the outlet water temperature within a preset outlet water temperature range;

[0027] Determine whether the water temperature can control the current battery stack temperature within a first preset temperature range during the use phase; if so, keep the power of the cooling device or the heating device unchanged; if not, increase the power of the cooling device or the heating device.

[0028] In one embodiment, a method for controlling an air conditioning system based on a battery stack state further includes:

[0029] If the outlet water temperature has reached the boundary of the preset outlet water temperature range and the battery stack temperature still cannot be controlled within the first preset temperature range, the power of the circulating water pump is increased while keeping the power of the cooling device or the heating device unchanged.

[0030] In a second aspect, an air conditioning system control system based on a battery stack state includes:

[0031] The acquisition module is used to obtain the user's usage habits of the battery stack and the current temperature of the battery stack; the usage habits include multiple usage stages with different operating durations corresponding to the time axis of the day; the battery stack is in different working states in each usage stage; the working state includes a static state and a running state;

[0032] The control module is used to determine whether the battery stack will exceed a second preset temperature range based on the current usage stage of the battery stack and the corresponding operating time when the current temperature exceeds the first preset temperature range; if so, control the air-conditioning system to control the current temperature of the battery stack within the first preset temperature range.

[0033] In a third aspect, a computer device comprises a memory and a processor, wherein the memory stores a computer program, and wherein the processor implements the steps of the method provided in the first aspect of the present application when executing the computer program.

[0034] In a fourth aspect, a computer-readable storage medium stores a computer program thereon, wherein when the computer program is executed by a processor, the steps of the method provided in the first aspect of the present application are implemented.

[0035] The above-mentioned air-conditioning system control method based on the battery stack status divides the use stage according to the user's use habits, and can predict the changes in the working state of the battery stack according to the user's use habits; uses the working state of the battery stack in the use stage as one of the air-conditioning action indicators, and can accurately judge the temperature change trend of the battery stack according to the charging and discharging power changes of the battery stack in different working states; predicts whether the second preset temperature is exceeded as one of the air-conditioning action indicators, which can prevent abnormal temperature from affecting and damaging the performance of the battery stack; controls the temperature of the battery stack within the first preset temperature range; can maintain the battery stack at a high efficiency, and effectively avoids power loss caused by temperature change lag in the temperature control equipment in the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 is a flowchart of a method for controlling an air conditioning system based on a battery stack state in one embodiment;

[0038] Figure 2 is a flowchart of a method for controlling an air conditioning system based on predicting battery stack temperature in one embodiment;

[0039] Figure 3 is a flowchart of the steps of an air conditioning system control method based on the battery stack power in a charging state in one embodiment;

[0040] Figure 4 is a flowchart of the steps of an air conditioning system control method based on the battery stack power in a discharge state in one embodiment;

[0041] Figure 5 is a flowchart of the steps of a method for predicting battery stack temperature based on battery stack status in one embodiment;

[0042] Figure 6A flowchart of steps for controlling the temperature of a battery stack within a first preset temperature range in one embodiment;

[0043] Figure 7 It is a structural block diagram of an air conditioning system control system based on the battery stack status in another embodiment. DETAILED DESCRIPTION

[0044] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0047] In this application, unless otherwise clearly specified and limited, the terms "initial", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0049] As described in the background technology, temperature is the external manifestation of heat accumulation inside the battery. Since heat is dissipated outward, when the battery surface reaches a certain temperature during battery operation, the internal temperature of the battery has reached a higher temperature, which has damaged the battery. When the battery stops working, the residual heat can still keep the battery surface at a certain temperature. At this time, continuing to cool is a waste of electricity. Therefore, using the battery stack temperature as an indicator for starting and shutting down the temperature control device has a certain lag, which will result in meaningless power loss. Based on the above problems, the present invention provides an air conditioning system control method based on the battery stack state.

[0050] The air conditioning system control method based on the battery stack state provided in the embodiment of the present application is as follows: Figure 1 As shown, the steps include steps 202 to 204. Among them:

[0051] Step 202, obtaining the user's usage habits for the battery stack and the current temperature of the battery stack; the usage habits include multiple usage stages with different operating durations corresponding to the time axis of the day; the battery stack is in different working states in each usage stage; the working state includes a static state and a running state.

[0052] Specifically, according to the historical working data of the battery stack, a day is divided into several usage stages, and the average duration of each usage stage is used as the operating time corresponding to the usage stage; the battery stack has a corresponding working state in each usage stage, where the operating state includes the charging state and the discharging state, and when in a static state, the battery stack does not charge or discharge; the current temperature of the battery stack can be obtained through the battery management system in the energy storage device.

[0053] It is understandable that since energy storage devices have a large amount of electrical energy reserves, they are often used to regulate power grids or range power supply. The power generation and consumption in production and life are regular, so the working time of energy storage devices has a certain time regularity, which depends on the user's usage habits. Since the heating principles of the battery stack are different in the charging state and the discharging state, the heat generated is also different.

[0054] Step 204, when the current temperature exceeds the first preset temperature range, determine whether the battery stack will exceed the second preset temperature range based on the current use stage of the battery stack and the corresponding operating time; if so, control the air conditioning system to control the current temperature of the battery stack within the first preset temperature range.

[0055] Specifically, the first preset temperature range is a temperature range with the highest efficiency of the battery stack, and the second preset temperature range is a temperature range with better efficiency of the battery stack. However, if the battery stack temperature exceeds the second preset temperature range, not only will the battery efficiency be low, but the battery may also be damaged. According to the current use stage and duration of the battery stack, it can be predicted whether the battery stack temperature will exceed the second preset temperature range during this stage. If so, the air-conditioning system can be started in advance to keep the battery stack temperature within the first preset temperature range with the best efficiency.

[0056] In an exemplary embodiment, the air conditioning system includes a coil disposed around and in contact with the battery stack, a circulating water pump connected to the coil, and a cooling device and a heating device respectively disposed at a water outlet of the circulating water pump, such as Figure 2 As shown, a method for controlling an air conditioning system based on a battery stack state further includes the following steps 302 to 306:

[0057] Step 302, when the temperature of the battery stack exceeds the upper limit of the first preset temperature range and is judged not to exceed the second preset temperature range, control the circulating water pump to be in an on state, and the cooling device and the heating device to be in an off state;

[0058] Specifically, since the upper limit of the first preset temperature range is generally higher than normal temperature, and the liquid temperature in the water pump is usually lower than normal temperature, when the battery stack temperature is higher than the upper limit of the first preset temperature range but not exceeding the second preset temperature range, the circulating water pump in the air-conditioning system can be started, and the battery stack temperature can be kept within the first preset temperature range by only using circulating water to dissipate heat.

[0059] Step 304, when the temperature of the battery stack reaches the upper limit of the first preset temperature range and is judged to exceed the second preset temperature range, control the circulating water pump and the cooling device to be in the on state and the heating device to be in the off state;

[0060] Specifically, when the battery stack temperature is about to exceed the upper limit of the first preset temperature range, and after determining that the battery temperature will exceed the upper limit of the second preset temperature range within the operating time of the current use phase, the circulating water pump and the cooling device in the air-conditioning system are started simultaneously. The cooling device can reduce the temperature of the circulating water, improve the heat dissipation efficiency of the circulating water, and maintain the battery stack temperature within the first preset temperature range.

[0061] Step 306, when the temperature of the battery stack reaches the lower limit of the first preset temperature range and is judged to exceed the second preset temperature range, control the circulating water pump and the heating device to be in the on state and the cooling device to be in the off state.

[0062] Specifically, when the battery stack temperature is about to exceed the lower limit of the first preset temperature range, after determining that the battery temperature will exceed the lower limit of the second preset temperature range within the operating time of the current use phase, the circulating water pump and the heating device in the air-conditioning system are started simultaneously. The heating device can increase the temperature of the circulating water and keep the battery stack temperature within the first preset temperature range.

[0063] In an exemplary embodiment, the operating state includes a charging state, such as Figure 3 As shown, a method for controlling an air conditioning system based on a battery status further includes the following steps 402 to 406:

[0064] Step 402, obtaining the current power of the battery stack, when the battery stack is in a charging state and the current power is less than a first preset power, controlling the circulating water pump and the cooling device to be in an on state and the heating device to be in an off state.

[0065] Specifically, the current charge of the battery stack is obtained from the battery management system. When the current charge is less than the first preset charge, the charging power is close to the peak value. The charging heat at this time causes the temperature of the battery stack to rise, exceeding the first preset temperature range, and even exceeding the second preset temperature range, resulting in reduced charging efficiency. Therefore, the circulating water pump and the cooling device can be turned on at the same time to keep the battery stack temperature within the first preset temperature range.

[0066] It is understandable that during the battery charging process, a three-stage charging mode is generally adopted, and the charging power will not always be at the peak value. Therefore, during the charging process, when the current power is less than the first preset power, the battery stack is charged at the peak charging power and the heat generation is the maximum; when the current power is greater than the first preset power and less than the second preset power, the charging power of the battery stack gradually decreases and the heat generation gradually decreases; when the current power is greater than the second preset power, the battery stack is charged to the rated power at a lower charging power, and the heat generation is very small during this period.

[0067] Step 404, when the battery stack is in a charging state and the current power is greater than the first preset power and less than the second preset power, control the circulating water pump to be in an on state, and the cooling device and the heating device to be in an off state.

[0068] Specifically, when the current power level is greater than the first preset power level and less than the second preset power level, the charging power of the battery stack gradually decreases, and the heat generation also gradually decreases. The battery stack temperature may still exceed the first preset temperature range within a certain period of time, but will not exceed the second preset temperature range. Therefore, only the circulating water pump needs to be turned on to keep the battery stack temperature within the first preset temperature range.

[0069] Step 406 , when the battery stack is in a charging state and the current power level is greater than a second preset power level, the air conditioning system is controlled to be in a standby state.

[0070] Specifically, when the current power is greater than the second preset power, the battery stack enters trickle charging. At this time, the heat generated is not enough to cause the battery stack temperature to exceed the first preset temperature range. Therefore, the air conditioning system can be turned off and the temperature can be maintained in the first preset temperature range by relying on the battery pack's own heat dissipation.

[0071] In an exemplary embodiment, the operating state also includes a discharge state, such as Figure 4 As shown, a method for controlling an air conditioning system based on a battery stack state further includes the following steps 502 to 504:

[0072] Step 502, when the battery stack is in a discharging state, obtaining the discharge power of the battery stack;

[0073] Specifically, the discharge power can be obtained by a battery management system.

[0074] It is understandable that, unlike the stable charging power of the battery stack in the charging state, the discharge power of the battery stack depends on the demand of the electrical equipment, and therefore, the discharge power of the battery stack needs to be acquired in real time.

[0075] Step 504, judging whether the battery stack can enter the next use stage in advance according to the operating time, discharge power and current power corresponding to the current use stage; if so, then when the current power is less than the third preset power, controlling the circulating water pump to be in the on state, and the cooling device and the heating device to be in the off state; if not, then when the current power is not less than the third preset power, controlling the circulating water pump and the cooling device to be in the on state, and the heating device to be in the off state.

[0076] Specifically, when it is determined that the battery stack temperature will exceed the second preset temperature range, the power consumption is calculated as the third preset power based on the remaining operating time and discharge power of the current use stage, and then compared with the current power to determine whether the current power of the battery stack will be exhausted before the end of the current stage. If so, the cooling device will not be turned on, and only the circulating water pump will be turned on; if the current power will not be exhausted, the cooling device and the circulating water pump can be turned on at the same time.

[0077] It is understandable that the charging and discharging states of the energy storage device are usually independent. In the discharging state, the air-conditioning system can only use the electricity of the energy storage device to work; in the air-conditioning system, the energy consumption of the cooling device is much greater than that of the circulating water pump.

[0078] In an exemplary embodiment, Figure 5As shown, based on the current use stage of the battery stack and the corresponding operating time, the step of determining whether the battery stack will exceed the second preset temperature range includes the following steps 602 to 608:

[0079] Step 602, obtaining the charging power and discharging power of the battery stack at preset time intervals, and obtaining the ambient temperature of the battery stack.

[0080] Specifically, the charging power and the discharging power can be obtained from the battery management system at preset time intervals during the use phase, and the ambient temperature can be obtained from a temperature sensor disposed on the inner wall of the energy storage device at preset time intervals.

[0081] It is understandable that when the air conditioning system is not turned on, the ambient temperature is the main reason affecting the heat dissipation of the battery stack. The greater the difference between the battery stack and the ambient temperature, the faster the heat dissipation speed and the more temperature changes in the same time interval.

[0082] Step 604, calling historical data to determine a first correspondence between charging power, charging time, ambient temperature and battery stack temperature, and to determine a second correspondence between discharging power, discharging time, ambient temperature and battery stack temperature.

[0083] Specifically, the charging time and the discharging time can be obtained by adding up the preset time intervals; based on the historical charging power, charging time, ambient temperature and battery stack temperature values, the first corresponding relationship can be obtained by fitting; similarly, based on the historical discharge power, discharge time, ambient temperature and battery stack temperature values, the second corresponding relationship can be obtained by fitting.

[0084] It is understandable that during the battery charging and discharging process, part of the energy will be dissipated as heat during the conversion of electrical energy and chemical energy. At the same time, the internal resistance of the battery will also generate a certain amount of heat, which accumulates inside the battery stack, causing the battery stack temperature to rise; but because the battery stack temperature is higher than the ambient temperature, part of the heat will be carried away by the air, lowering the battery stack temperature; the greater the temperature difference between the environment and the battery stack, the faster the heat dissipation rate, and after a certain time interval, the heat dissipation and heat generation will eventually reach a balance, and the battery stack temperature at this time has a first corresponding relationship with the charging power and the ambient temperature; similarly, the battery stack temperature at this time has a second corresponding relationship with the discharge power and the ambient temperature.

[0085] Step 606, when the battery stack is in a charging state, obtain the changing trend of the charging power of the battery stack according to each charging power, and judge whether the battery stack will exceed the second preset temperature range based on the first corresponding relationship, the changing trend of the charging power and the operating time of the current use stage.

[0086] Specifically, based on a number of charging power data within a period of time in the use stage, the changing trend of the battery stack charging power is calculated, and the charging power curve in the use stage is predicted based on the changing trend; based on the first corresponding relationship, the charging power curve and the operating time of the current use stage, the battery stack temperature at any moment within the operating time of the current use stage can be predicted; based on the predicted battery stack temperature value, it is determined whether the battery stack temperature will exceed the second preset temperature range in the current use stage.

[0087] Step 608, in the discharge state, obtain the change trend of the battery stack discharge power according to each discharge power, and judge whether the battery stack will exceed the second preset temperature range based on the second corresponding relationship, the change trend of the discharge power and the operating time of the current use stage.

[0088] Specifically, based on a number of discharge power data within a period of time in the use stage, the change trend of the battery stack discharge power is calculated, and the discharge power curve in the use stage is predicted based on the change trend; based on the first corresponding relationship, the discharge power curve and the operating time of the current use stage, the battery stack temperature at any moment within the operating time of the current use stage can be predicted; based on the predicted battery stack temperature value, it is determined whether the battery stack temperature will exceed the second preset temperature range in the current use stage.

[0089] In an exemplary embodiment, Figure 6 As shown, the step of controlling the air conditioning system to control the current temperature of the battery stack within the first preset temperature range includes the following steps 702 to 706:

[0090] Step 702, obtaining the outlet water temperature of the circulating water pump.

[0091] Specifically, the outlet water temperature can be obtained by configuring a temperature sensor at the outlet of the circulating water pump.

[0092] Step 704, when the cooling device or the heating device is in the on state, control the power of the cooling device or the heating device to keep the outlet water temperature within a preset outlet water temperature range.

[0093] Specifically, when the battery stack temperature has exceeded the first preset temperature range and is about to exceed the second preset temperature range, the cooling device or the heating device is in the on state; in this case, the cooling device or the heating device is controlled to operate at the lowest power to keep the outlet water temperature within a preset outlet water temperature range close to the ambient temperature.

[0094] It is understandable that, since the lower the target water outlet temperature is within a certain period of time, the higher the power required by the cooling device, for energy saving reasons, the preset water outlet temperature is only set near the ambient temperature, which not only reduces the power but also ensures that when the cooling device is stopped, the circulating water temperature will not differ too much from the first preset temperature range of the battery stack; the same applies to the heating device.

[0095] Step 706, determine whether the water temperature can control the current battery stack temperature within the first preset temperature range during the use phase; if so, keep the power of the cooling device or the heating device unchanged; if not, increase the power of the cooling device or the heating device.

[0096] Specifically, when the outlet water temperature has stabilized, the temperature change trend of the battery stack is predicted based on the battery stack temperature obtained at preset time intervals; if the battery stack temperature can be maintained in the first preset temperature range during the operating time of the current use stage, the current temperature of the cooling device or the heating device is maintained unchanged; if the battery stack temperature still exceeds the first preset temperature range during the operating time of the current use stage, the power of the cooling device or the heating device is increased to control the battery stack temperature within the first preset temperature range while ensuring that the outlet water temperature is within the preset water outlet temperature range.

[0097] It is understandable that when the battery stack temperature exceeds the upper limit of the first preset temperature range, if the water outlet temperature at the upper limit of the preset water outlet temperature range cannot keep the battery stack temperature within the first preset temperature range, the water outlet temperature in the middle or lower limit of the preset water outlet temperature range may be able to do so.

[0098] In an exemplary embodiment, the method further includes:

[0099] If the outlet water temperature has reached the boundary of the preset outlet water temperature range and the current battery stack temperature still cannot be controlled within the first preset temperature range, the power of the circulating water pump is increased while keeping the power of the cooling device or the heating device unchanged.

[0100] Specifically, if the outlet water temperature has reached the boundary of the preset outlet water temperature range and the current battery stack temperature still cannot be controlled within the first preset temperature range, the power of the current cooling device or heating device is kept unchanged, and the power of the circulating water pump is increased at a certain power interval until the battery stack temperature can be maintained within the first preset temperature range.

[0101] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0102] Based on the same inventive concept, the embodiment of the present application also provides a method for implementing the above-mentioned air conditioning system control system 800 based on the battery stack state. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in one or more embodiments of the air conditioning system control system based on the battery stack state provided below can refer to the limitations of the air conditioning system control method based on the battery stack state in the above text, and will not be repeated here.

[0103] An air conditioning system control system 800 based on battery stack status, such as Figure 7 As shown, it includes the following acquisition module 801 to control module 802:

[0104] Collection module 801, collection module, is used to obtain the user's usage habits of the battery stack and the current temperature of the battery stack; the usage habits include multiple usage stages with different operating durations corresponding to the time axis of the day; the battery stack is in different working states in each of the usage stages; the working state includes a static state and a running state.

[0105] Control module 802, a control module, is used to determine whether the battery stack will exceed a second preset temperature range based on the current usage stage of the battery stack and the corresponding operating time when the current temperature exceeds the first preset temperature range; if so, control the air-conditioning system to control the current temperature of the battery stack within the first preset temperature range.

[0106] The present application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of a method for controlling an air conditioning system based on a battery stack status as provided in the present application are implemented.

[0107] The present application also provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of a method for controlling an air-conditioning system based on a battery stack status as provided in the present application are implemented.

[0108] It should be understood that although Figures 1 to 6 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figures 1 to 6 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0109] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0110] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0111] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A method for controlling an air conditioning system based on a battery stack state, characterized in that: The method comprises: Acquire the user's usage habits of the battery stack and the current temperature of the battery stack; the usage habits include a plurality of usage stages with different operating durations corresponding to the time axis of the day; the battery stack is in a different working state in each of the usage stages; the working state includes a static state and a running state; When the current temperature exceeds the first preset temperature range, it is determined whether the battery stack will exceed the second preset temperature range based on the current usage stage of the battery stack and the corresponding operating time; if so, the air-conditioning system is controlled to control the current temperature of the battery stack within the first preset temperature range.

2. The method according to claim 1, characterized in that The air conditioning system includes a coil disposed around and in contact with the battery stack, a circulating water pump connected to the coil, and a cooling device and a heating device respectively disposed at a water outlet of the circulating water pump; the method further includes: When the temperature of the battery stack exceeds the first preset temperature range and is judged not to exceed the second preset temperature range, controlling the circulating water pump to be turned on and the cooling device and the heating device to be turned off; When the temperature of the battery stack reaches an upper limit of the first preset temperature range and is judged to exceed the second preset temperature range, controlling the circulating water pump and the cooling device to be in an on state and the heating device to be in an off state; When the temperature of the battery stack reaches the lower limit of the first preset temperature range and is judged to exceed the second preset temperature range, the circulating water pump and the heating device are controlled to be in the on state and the cooling device is controlled to be in the off state.

3. The method according to claim 2, characterized in that The operating state includes a charging state; and the method further includes: Acquire the current power of the battery stack, and when the battery stack is in a charging state and the current power is less than a first preset power, control the circulating water pump and the cooling device to be in an on state and the heating device to be in an off state; When the battery stack is in a charging state and the current power is greater than a first preset power and less than a second preset power, the circulating water pump is controlled to be in an on state, and the cooling device and the heating device are controlled to be in an off state; When the battery stack is in a charging state and the current power level is greater than the second preset power level, the air conditioning system is controlled to be in a standby state.

4. The method according to claim 3, characterized in that The operating state also includes a discharging state; and the method further includes: When the battery stack is in a discharging state, obtaining the discharging power of the battery stack; According to the operating time corresponding to the current usage stage, the discharge power and the current power, determine whether the battery stack can enter the next usage stage in advance; if so, then when the current power is less than the third preset power, control the circulating water pump to be in the on state, and the cooling device and the heating device to be in the off state; if not, then when the current power is not less than the third preset power, control the circulating water pump and the cooling device to be in the on state, and the heating device to be in the off state.

5. The method according to claim 4, characterized in that Based on the current use stage of the battery stack and the corresponding operation time, the step of determining whether the battery stack exceeds a second preset temperature range includes: Acquire the charging power and discharging power of the battery stack at preset time intervals, and acquire the ambient temperature of the battery stack; Calling historical data to determine a first correspondence between the charging power, the charging time, the ambient temperature, and the battery stack temperature, and determining a second correspondence between the discharging power, the discharging time, the ambient temperature, and the battery stack temperature; When the battery stack is in a charging state, obtaining a change trend of the charging power of the battery stack according to each charging power, and judging whether the battery stack will exceed a second preset temperature range based on the first corresponding relationship, the change trend of the charging power and the running time of the current use phase; In the discharge state, the change trend of the discharge power of the battery stack is obtained according to each discharge power, and based on the second corresponding relationship, the change trend of the discharge power and the operating time of the current use phase, it is judged whether the battery stack will exceed the second preset temperature range.

6. The method according to claim 5, characterized in that The step of controlling the air conditioning system to control the current temperature of the battery stack within the first preset temperature range includes: Obtaining the outlet water temperature of the circulating water pump; When the cooling device or the heating device is in an on state, controlling the power of the cooling device or the heating device to keep the outlet water temperature within a preset outlet water temperature range; Determine whether the outlet water temperature can control the battery stack temperature within a first preset temperature range during the use phase; if so, keep the power of the cooling device or the heating device unchanged; if not, increase the power of the cooling device or the heating device.

7. The method according to claim 6, characterized in that The method further comprises: If the outlet water temperature has reached the boundary of the preset outlet water temperature range and the battery stack temperature still cannot be controlled within the first preset temperature range, the power of the circulating water pump is increased while keeping the power of the cooling device or the heating device unchanged.

8. An air conditioning system control system based on battery stack status, characterized in that: The system comprises: A collection module, used for obtaining the user's usage habits of the battery stack and the current temperature of the battery stack; the usage habits include a plurality of usage stages with different operating durations corresponding to the time axis of the day; the battery stack is in a different working state in each of the usage stages; the working state includes a static state and a running state; A control module is used to determine whether the battery stack will exceed a second preset temperature range based on the current usage stage of the battery stack and the corresponding operating time when the current temperature exceeds the first preset temperature range; if so, control the air-conditioning system to control the current temperature of the battery stack within the first preset temperature range.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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