Thermal management method, thermal management system, storage medium and vehicle

Abstract

The invention discloses a thermal management method, a thermal management system, a storage medium and a vehicle. The thermal management method comprises the following steps: S1, setting a sampling time period r; s2, acquiring temperature data, voltage data and current data of the battery in the sampling time period r; s3, obtaining a battery state comprehensive value FG according to the temperature data, the voltage data and the current data of the battery in the sampling time period r; and S4, comparing the FG with a set battery state threshold value E, if the FG is greater than E, judging that the battery is in an abnormal state, controlling the thermal management system to enter a battery heat exchange amount adjusting state, and if the FG is less than or equal to E, maintaining the working state of the thermal management system. According to the thermal management method provided by the invention, the state of the battery is judged through the temperature data, the voltage data and the current data of the battery, so that the accuracy degree of judging the state of the battery by the thermal management system can be improved, the adaptation degree of a heat exchange strategy of the thermal management system and the working state of the battery is improved, and the safety of the battery is improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a thermal management method, a thermal management system, a storage medium and a vehicle. Background Art

[0002] With the rapid development and popularization of new energy vehicles, new energy vehicles are also facing a series of technical challenges. The battery safety of new energy is an issue of great concern to everyone. Among them, the temperature control of the battery by the battery thermal management system is more important to the safety of the battery. As the battery operating conditions change, the thermal management system's heat exchange strategy for the battery also needs to be changed. In related technologies, the heat exchange strategy of the thermal management system is poorly adapted to the battery operating conditions, affecting the safety of the battery. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a thermal management method, which can improve the accuracy of battery status determination.

[0004] The present invention also provides a thermal management system using the thermal management method.

[0005] The invention also provides a storage medium.

[0006] The present invention also provides a vehicle.

[0007] The thermal management method according to the first aspect of the present invention includes: S1, setting a sampling time period r; S2, obtaining the temperature data, voltage data and current data of the battery within the sampling time period r; S3, obtaining the comprehensive battery status value FG within the sampling time period r according to the temperature data, voltage data and current data of the battery within the sampling time period r; S4, comparing FG and setting the battery status threshold E, if FG>E, it is determined that the battery is in an abnormal state, and the thermal management system is controlled to enter the battery heat exchange adjustment state, if FG≤E, the thermal management system is maintained in the working state.

[0008] According to the thermal management method of the first aspect of the present invention, the battery status is determined by comprehensively analyzing the battery's temperature data, voltage data, and current data. This can improve the accuracy of the thermal management system's determination of the battery status, thereby improving the adaptability of the thermal management system's heat exchange strategy to the battery's operating status and improving the safety of the battery.

[0009] According to some embodiments of the present invention, the battery heat exchange adjustment state includes: S41, obtaining a temperature over-limit value D in each sampling time period r according to the temperature data of the battery, where D satisfies the following equation: Wherein, temperature over-limit means that the battery temperature deviates from the normal temperature range, k represents the kth temperature over-limit time zone within the time period r, ND Indicates that there are a total of N in time period r D temperature exceeding the limit time zone, q0(k) represents the starting time point of the temperature exceeding the limit time zone k, q A (k) represents the end time point of the temperature limit time zone k, w k (a) represents the battery temperature at each time point in the temperature limit crossing time zone k; S42, determine the D value, if D>0, control the vehicle to cool the battery, if D≤0, control the vehicle to heat the battery.

[0010] According to some embodiments of the present invention, step S42 includes: if D>0, round up D / h to obtain the number s of temperature limit ranges, and control the vehicle's cooling power to s*R rated cooling power; if D≤0, round up -D / h to obtain the number s of temperature limit ranges, and control the vehicle's heating power to s*R rated heating power, where s*R<T, T is the set temperature adjustment threshold, h is the set temperature limit threshold, and R is the adjustment percentage.

[0011] According to some embodiments of the present invention, step S3 includes: S31, obtaining a battery temperature state change value Sd according to the battery temperature data, obtaining a battery voltage state change value Ua according to the battery voltage data, and obtaining a battery charge state change value So according to the battery current data; S32, obtaining FG through the following equation: FG(r)=k1Sd(r)+k2Ua(r)+k3So(r), wherein k1+k2+k3=1.

[0012] According to some embodiments of the present invention, Sd is obtained by the following equation: Among them, w r (a) represents the battery temperature value at time point a in time period r, a represents the ath time point in time period r, A represents that time period r contains a total of A time points, and the duration of time period r is t, c represents a constant, and D is the temperature limit value; D is obtained by the following equation: Wherein, temperature over-limit means that the battery temperature deviates from the normal temperature range, k represents the kth temperature over-limit time zone within the time period r, N D Indicates that there are a total of N in time period r D temperature exceeding the limit time zone, q0(k) represents the starting time point of the temperature exceeding the limit time zone k, q A (k) represents the end time point of the temperature limit time zone k, w k (a) shows the battery temperature at each time point in the temperature limit exceeding time region k.

[0013] According to some embodiments of the present invention, Ua is obtained by the following equation: Wherein, U represents the rated voltage value of the battery in the time period r, and B represents the voltage over-limit value; B is obtained by the following equation: Wherein, voltage over-limit refers to the voltage of the battery deviating from the normal voltage range, p0(j) represents the starting time point of voltage over-limit time zone j, and p A (j) represents the end time point of voltage over-limit time zone j, d j (a) represents the battery output power at each time point in the voltage limit crossing time region j.

[0014] According to some embodiments of the present invention, So is obtained by the following equation: Among them, z r (a) represents the battery output current value at time point a within time period r, c represents a constant, and F is the current over-limit value; F is obtained by the following equation: Among them, the current limit is that the battery current deviates from the normal current range, o0(m) represents the starting time point of the current limit time zone m, and o A (m) represents the end time point of the current limit-crossing time zone m, z m (a) represents the battery output current at each time point in the current limit-exceeding time region m, and I represents the center value of the normal current range.

[0015] According to the thermal management system of the second aspect of the present invention, the thermal management method according to the first aspect of the present invention is applied, and the heat pipe system includes: a battery status monitoring module, the battery status monitoring module includes: a temperature monitoring unit, a voltage monitoring unit, a current monitoring unit and a battery status monitoring unit, the temperature monitoring unit is used to monitor the battery temperature; the voltage monitoring unit is used to monitor the battery voltage, the current monitoring unit is used to monitor the battery current, and the battery status monitoring unit is electrically connected to the temperature monitoring unit, the voltage monitoring unit and the current monitoring unit respectively; a thermal management control module, the thermal management control module includes: a judgment unit and a control unit, the judgment unit is electrically connected to the battery status monitoring unit to determine the battery status, the control unit is electrically connected to the judgment unit, and the control unit is suitable for regulating the heat exchange amount of the battery.

[0016] According to the thermal management system of the second aspect of the present invention, by applying the thermal management method according to the first aspect of the present invention, the adaptability of the heat exchange strategy of the thermal management system to the battery operating conditions can be improved, thereby improving the safety of the battery.

[0017] According to the storage medium of the third aspect of the present invention, a thermal management control program is stored on the storage medium, and when the thermal management control program is executed, the thermal management method according to the first aspect of the present invention is implemented.

[0018] The storage medium according to the third aspect of the present invention can implement the thermal management method according to the first aspect of the present invention, thereby improving the safety of the battery during vehicle operation.

[0019] A vehicle according to a fourth aspect of the present invention comprises: the thermal management system according to the second aspect of the present invention or the storage medium according to the third aspect of the present invention.

[0020] According to the vehicle of the fourth aspect of the present invention, the safety of the vehicle can be improved by providing the thermal management system according to the second aspect of the present invention or the storage medium according to the third aspect of the present invention.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flow chart of a thermal management control method according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 Flow chart of the battery heat exchange adjustment state shown in . DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] Reference below Figure 1 and Figure 2 A thermal management method according to an embodiment of the first aspect of the present invention is described.

[0026] like Figure 1 As shown, the thermal management method according to the first aspect of the present invention includes:

[0027] S1. Set the sampling time period r.

[0028] During the operation of the vehicle, a time period r is divided every r time on the time axis.

[0029] S2. Obtaining temperature data, voltage data, and current data of the battery within a sampling period r.

[0030] Among them, the temperature data includes the battery temperature, the change of the battery temperature and the comparison between the battery temperature and the normal battery temperature. Similarly, the voltage data includes the battery voltage, the change of the battery voltage and the comparison between the battery voltage and the normal battery voltage. The current data includes the battery current, the change of the battery current and the comparison between the battery current and the normal current.

[0031] S3. Obtain a comprehensive value FG of the battery state within the sampling time period r according to the temperature data, voltage data and current data of the battery within the sampling time period r.

[0032] The battery state comprehensive value FG integrates the temperature data, voltage data and current data of the battery to quantify the working state of the battery.

[0033] S4, compare FG and set battery status threshold E,

[0034] If FG>E, the battery is judged to be in an abnormal state, and the thermal management system is controlled to enter the battery heat exchange adjustment state.

[0035] If FG≤E, the thermal management system is maintained in working state.

[0036] Among them, when FG>E, it is determined that the current working state of the battery deviates greatly from the theoretical normal working state of the battery. The thermal management system adjusts the heat exchange of the battery, thereby changing the temperature of the battery. When adjusting the heat exchange, the battery can be cooled or heated.

[0037] It can be understood that the battery voltage, battery temperature and battery current are data parameters that are strongly correlated with the battery working status during the battery operation. The battery status comprehensive value FG is derived through the battery temperature data, voltage data and current data. The vehicle's thermal management system determines the battery status with reference to the FG value, and the determined battery status is more in line with the actual working conditions of the battery.

[0038] In practical applications, the value of FG is usually set within a range greater than 0 and less than 1, and the value of E is set between 0.5 and 0.7.

[0039] According to the thermal management method of the first aspect of the present invention, the battery status is determined by comprehensively analyzing the battery's temperature data, voltage data, and current data. This can improve the accuracy of the thermal management system's determination of the battery status, thereby improving the adaptability of the thermal management system's heat exchange strategy to the battery's operating status and improving the battery's safety.

[0040] In some embodiments of the present invention, Figure 2 As shown, the battery heat exchange adjustment state includes:

[0041] S41, obtaining the temperature over-limit value D in each sampling time period r according to the temperature data of the battery, where D satisfies the following equation:

[0042]

[0043] Wherein, temperature over-limit means that the battery temperature deviates from the normal temperature range, k represents the kth temperature over-limit time zone within the time period r, N D Indicates that there are a total of N in time period r D temperature exceeding the limit time zone, q0(k) represents the starting time point of the temperature exceeding the limit time zone k, q A (k) represents the end time point of the temperature limit time zone k, w k (a) represents the battery temperature at each time point in the temperature limit crossing time region k;

[0044] S42, determine the D value,

[0045] If D>0, the vehicle is controlled to cool the battery.

[0046] If D≤0, the vehicle is controlled to heat the battery.

[0047] Therefore, the degree to which the battery temperature deviates from the normal temperature range within the time period r can be quantified. When D>0, the battery temperature exceeds the normal temperature to a large extent. At this time, the battery needs to be cooled, and the vehicle's thermal management system enters the cooling mode; when D≤0, the battery temperature is lower than the normal battery temperature to a large extent. At this time, the battery needs to be heated, and the vehicle's thermal management system enters the heating mode.

[0048] In actual applications, it is found that the normal temperature range of the battery is 15℃-35℃, that is, when the battery temperature exceeds 35℃, the battery needs to be cooled, and when the battery temperature is lower than 15℃, the battery needs to be heated.

[0049] In some embodiments of the present invention, step S42 includes:

[0050] If D>0, round up D / h to get the number of temperature limit ranges s, and control the vehicle cooling power to s*R rated cooling power.

[0051] If D≤0, round up -D / h to get the number of temperature limit violations s, and control the vehicle heating power to s*R rated heating power.

[0052] Wherein, s*R<T, T is the set temperature adjustment threshold, h is the set temperature over-limit threshold, and R is the adjustment percentage.

[0053] Preferably, the thermal management system exchanges heat for the battery through a heat pump. When adjusting the heat exchange amount of the battery, the heating or cooling power of the heat pump is adjusted by adjusting the opening of the electronic expansion valve. For example, s can be 1, 2, 3, 4 or 5, and the corresponding opening of the electronic expansion valve is R, 2R, 3R, 4R or 5R. In this way, quantitative control of the adjustment of the heat exchange amount of the battery can be achieved.

[0054] In practical applications, in order to make the thermal management system more stable, R is between 5% and 10%, and T is between 80% and 90%. For example, when T is 80%, the power of the thermal management system when adjusting the battery temperature does not exceed 80% of the rated power.

[0055] In some embodiments of the present invention, step S3 includes:

[0056] S31, obtaining a battery temperature state change value Sd according to the battery temperature data, obtaining a battery voltage state change value Ua according to the battery voltage data, and obtaining a battery charge state change value So according to the battery current data;

[0057] S32. FG is obtained by the following equation:

[0058] FG(r)=k1Sd(r)+k2Ua(r)+k3So(r), where k1+k2+k3=1.

[0059] Sd can quantify the change in the battery temperature state. The value of Sd is greater than 0 and less than 1. When Sd tends to 0, it means that the possibility that the battery temperature deviates from the normal temperature range tends to 0. When Sd tends to 1, it means that the possibility that the battery temperature deviates from the normal temperature range tends to 1.

[0060] Ua can quantify the change in battery voltage state. The value of Ua is greater than 0 and less than 1. When Ua tends to 0, it means that the possibility of the battery voltage deviating from the normal voltage range tends to 0. When Ua tends to 1, it means that the possibility of the battery voltage deviating from the normal voltage range tends to 1.

[0061] So can quantify the change of battery state of charge. The value of So is greater than 0 and less than 1. When So tends to 0, it means that the possibility of the battery current deviating from the normal current range tends to 0. When So tends to 1, it means that the possibility of the battery current deviating from the normal current range tends to 1.

[0062] In practical applications, k1 is usually in the range of 0.5-0.6, k2 is usually in the range of 0.3-0.4, and k3 is usually in the range of 0.1-0.2.

[0063] In some embodiments of the present invention, Sd is obtained by the following equation:

[0064]

[0065] Among them, w r (a) represents the battery temperature value at time point a in time period r, a represents the ath time point in time period r, A represents that time period r contains a total of A time points, and the duration of time period r is t, c represents a constant, and D represents the temperature over-limit value;

[0066] D is obtained by the following equation:

[0067]

[0068] Wherein, temperature over-limit means that the battery temperature deviates from the normal temperature range, k represents the kth temperature over-limit time zone within the time period r, N D Indicates that there are a total of N in time period r D temperature exceeding the limit time zone, q0(k) represents the starting time point of the temperature exceeding the limit time zone k, q A (k) represents the end time point of the temperature limit time zone k, w k (a) shows the battery temperature at each time point in the temperature limit exceeding time region k.

[0069] In this way, the Sd value can be obtained. During the operation of the thermal management system, the temperature monitoring unit monitors the battery temperature and calculates the Sd value through the above equation. The battery status monitoring unit obtains the Sd value calculated by the temperature monitoring unit to calculate the FG value.

[0070] In actual applications, it is found that the normal temperature range of the battery is 15°C-35°C. When applying the above equation, preferably, 15°C and 35°C are used as the lower limit and upper limit of the normal temperature range respectively to calculate Sd.

[0071] In some embodiments of the present invention, Ua is obtained by the following equation:

[0072]

[0073] Wherein, U represents the rated voltage value of the battery in the time period r, and B represents the voltage over-limit value;

[0074] B is obtained by the following equation:

[0075]

[0076] Wherein, voltage over-limit refers to the voltage of the battery deviating from the normal voltage range, p0(j) represents the starting time point of voltage over-limit time zone j, and p A (j) represents the end time point of voltage over-limit time zone j, dj (a) represents the battery output power at each time point in the voltage limit crossing time region j.

[0077] In this way, the Ua value can be obtained. During the operation of the thermal management system, the voltage monitoring unit monitors the battery voltage and calculates the Ua value through the above equation. The battery status monitoring unit obtains the Ua value calculated by the voltage monitoring unit to calculate the FG value.

[0078] It is understandable that the rated voltage value U is within the normal voltage range. In actual applications, it is found that the normal voltage range of a battery cell is 2.8V-4.2V. When the above equation is applied to calculate Ua, the end value of the voltage range of the battery is calculated based on the number of battery cells connected in series in the battery and the end value of the normal battery cell voltage range. For example, when the battery includes 96 battery cells, the normal voltage range of the battery is 268.8V-403.2V, and 268.8V and 403.2V are used as the lower limit and upper limit of the normal voltage of the battery to calculate Ua.

[0079] In some embodiments of the present invention, So is obtained by the following equation:

[0080]

[0081] Among them, z r (a) represents the battery output current value at time point a within time period r, c represents a constant, and F represents the current over-limit value;

[0082] F is obtained by the following equation:

[0083]

[0084] Among them, the current limit is that the battery current deviates from the normal current range, o0(m) represents the starting time point of the current limit time zone m, and o A (m) represents the end time point of the current limit-crossing time zone m, z m (a) represents the battery output current at each time point in the current limit-exceeding time region m, and I represents the center value of the normal current range.

[0085] Thus, the So value can be obtained. During the operation of the thermal management system, the current monitoring unit monitors the battery current and calculates the So value through the above equation. The battery status monitoring unit obtains the So value calculated by the current monitoring unit to calculate the FG value.

[0086] In actual applications, it is found that the current of the battery during the charging and discharging process is 1 to 3 times the battery capacity value. For example, for a battery with a capacity of 60kWh, its continuous current should be 60A-180A, and its instantaneous peak value should not exceed 300A. When applying the above equation to calculate So, 60A and 180A are used as the lower and upper limits of the normal current to calculate So.

[0087] According to the thermal management system of the second embodiment of the present invention, the thermal management method of the first embodiment of the present invention is applied, and the heat pipe system includes: a battery status monitoring module and a thermal management control module.

[0088] Specifically, the battery status monitoring module includes: a temperature monitoring unit, a voltage monitoring unit, a current monitoring unit and a battery status monitoring unit. The temperature monitoring unit is used to monitor the battery temperature, the voltage monitoring unit is used to monitor the battery voltage, and the current monitoring unit is used to monitor the battery current. The battery status monitoring unit is electrically connected to the temperature monitoring unit, the voltage monitoring unit and the current monitoring unit respectively. The thermal management control module includes: a judgment unit and a control unit. The judgment unit is electrically connected to the battery status monitoring unit to determine the battery status. The control unit is electrically connected to the judgment unit. The control unit is suitable for controlling the heat exchange amount of the battery.

[0089] During the operation of the thermal management system, the temperature monitoring unit monitors the temperature of the battery and calculates the temperature data, the voltage monitoring unit monitors the battery voltage and calculates the voltage data, the current monitoring unit monitors the battery current and calculates the current data, the battery status monitoring unit calculates FG based on the temperature data obtained by the temperature monitoring unit, the voltage data obtained by the voltage monitoring unit and the current data obtained by the current monitoring unit, the judgment unit compares the FG value and the battery status threshold E to make a judgment on the battery status, and sends an instruction to the control unit according to the judgment result, and the control unit controls the thermal management system to enter the battery heat exchange adjustment state according to the judgment unit. In this way, the thermal management method according to the first aspect of the present invention can be realized.

[0090] According to the thermal management system of the second aspect of the present invention, by applying the thermal management method according to the first aspect of the present invention, the adaptability of the heat exchange strategy of the thermal management system to the battery operating conditions can be improved, thereby improving the safety of the battery.

[0091] According to the storage medium of the embodiment of the third aspect of the present invention, a thermal management control program is stored on the storage medium, and when the thermal management control program is executed, the thermal management method according to the embodiment of the first aspect of the present invention is implemented.

[0092] The storage medium according to the embodiment of the third aspect of the present invention can implement the thermal management method according to the first aspect of the present invention, thereby improving the safety of the battery during vehicle operation.

[0093] A vehicle according to an embodiment of a fourth aspect of the present invention comprises: the thermal management system according to the embodiment of the second aspect of the present invention or the storage medium according to the embodiment of the third aspect of the present invention.

[0094] The vehicle according to the fourth aspect of the present invention can improve the safety of the vehicle by providing the thermal management system according to the second aspect of the present invention or the storage medium according to the third aspect of the present invention.

[0095] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0096] 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 one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0097] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "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, an electrical connection, or a communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0098] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0099] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A thermal management method, characterized in that: include: S1, set the sampling time period r; S2, obtaining temperature data, voltage data and current data of the battery within a sampling period r; S3, obtaining a comprehensive value FG of the battery state within the sampling time period r according to the temperature data, voltage data and current data of the battery within the sampling time period r; S4, compare FG and set battery status threshold E, If FG>E, the battery is judged to be in an abnormal state, and the thermal management system is controlled to enter the battery heat exchange adjustment state. If FG≤E, the thermal management system is maintained in working state.

2. The thermal management method according to claim 1, characterized in that: The battery heat exchange adjustment state includes: S41, obtaining the temperature over-limit value D in each sampling time period r according to the temperature data of the battery, where D satisfies the following equation: Wherein, temperature over-limit means that the battery temperature deviates from the normal temperature range, k represents the kth temperature over-limit time zone within the time period r, N D Indicates that there are a total of N in time period r D temperature exceeding the limit time zone, q0(k) represents the starting time point of the temperature exceeding the limit time zone k, q A (k) represents the end time point of the temperature limit time zone k, w k (a) represents the battery temperature at each time point in the temperature limit crossing time region k; S42, determine the D value, If D>0, the vehicle is controlled to cool the battery. If D≤0, the vehicle is controlled to heat the battery.

3. The thermal management method according to claim 2, characterized in that: The step S42 comprises: If D>0, round up D / h to get the number of temperature limit ranges s, and control the vehicle cooling power to s*R rated cooling power. If D≤0, round up -D / h to get the number of temperature limit violations s, and control the vehicle heating power to s*R rated heating power. Wherein, s*R<T, T is the set temperature adjustment threshold, h is the set temperature over-limit threshold, and R is the adjustment percentage.

4. The thermal management method according to claim 1, characterized in that: The step S3 comprises: S31, obtaining a battery temperature state change value Sd according to the battery temperature data, obtaining a battery voltage state change value Ua according to the battery voltage data, and obtaining a battery charge state change value So according to the battery current data; S32. FG is obtained by the following equation: FG(r)=k1Sd(r)+k2Ua(r)+k3So(r), where k1+k2+k3=1.

5. The thermal management method according to claim 4, characterized in that: Sd is obtained by the following equation: Among them, w r (a) represents the battery temperature value at time point a in time period r, a represents the ath time point in time period r, A represents that time period r contains a total of A time points, and the duration of time period r is t, c represents a constant, and D represents the temperature over-limit value; D is obtained by the following equation: Wherein, temperature over-limit means that the battery temperature deviates from the normal temperature range, k represents the kth temperature over-limit time zone within the time period r, N D Indicates that there are a total of N in time period r D temperature exceeding the limit time zone, q0(k) represents the starting time point of the temperature exceeding the limit time zone k, q A (k) represents the end time point of the temperature limit time zone k, w k (a) shows the battery temperature at each time point in the temperature limit exceeding time region k.

6. The thermal management method according to claim 4, characterized in that: Ua is obtained by the following equation: Wherein, U represents the rated voltage value of the battery in the time period r, and B represents the voltage over-limit value; B is obtained by the following equation: Wherein, voltage over-limit refers to the voltage of the battery deviating from the normal voltage range, p0(j) represents the starting time point of voltage over-limit time zone j, and p A (j) represents the end time point of voltage over-limit time zone j, d j (a) represents the battery output power at each time point in the voltage limit crossing time region j.

7. The thermal management method according to claim 4, characterized in that: So is obtained by the following equation: Among them, z r (a) represents the battery output current value at time point a within time period r, c represents a constant, and F represents the current over-limit value; F is obtained by the following equation: Among them, the current limit is that the battery current deviates from the normal current range, o0(m) represents the starting time point of the current limit time zone m, and o A (m) represents the end time point of the current limit-crossing time zone m, z m (a) represents the battery output current at each time point in the current limit-exceeding time region m, and I represents the center value of the normal current range.

8. A thermal management system, characterized in that: The thermal management method according to any one of claims 1 to 7 is applied, wherein the thermal management system comprises: A battery status monitoring module, the battery status monitoring module comprising: a temperature monitoring unit, a voltage monitoring unit, a current monitoring unit and a battery status monitoring unit, the temperature monitoring unit is used to monitor the battery temperature; the voltage monitoring unit is used to monitor the battery voltage, the current monitoring unit is used to monitor the battery current, and the battery status monitoring unit is electrically connected to the temperature monitoring unit, the voltage monitoring unit and the current monitoring unit respectively; A thermal management and control module, the thermal management and control module includes: a judgment unit and a control unit, the judgment unit is electrically connected to the battery status monitoring unit to determine the battery status, the control unit is electrically connected to the judgment unit, and the control unit is suitable for regulating the heat exchange amount of the battery.

9. A storage medium, characterized in that: The storage medium stores a thermal management control program, and when the thermal management control program is executed, the thermal management method according to any one of claims 1 to 7 is implemented.

10. A vehicle, characterized in that: include: The thermal management system of claim 8 or the storage medium of claim 9.

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