Vehicle energy management method, device, equipment and medium

Abstract

The invention provides an energy management method, device and equipment of a vehicle and a medium. The method comprises the following steps: identifying an energy recovery road section of the vehicle in a front driving road section; predicting first recoverable power of the vehicle in the energy recovery road section based on the basic parameters of the vehicle and the road information of the energy recovery road section; on the basis of the current battery parameters and the battery parameter variation from the current position of the vehicle to the initial position of the energy recovery road section, second recoverable power of the battery at the initial position is predicted; and if the second recoverable power is smaller than the first recoverable power, performing thermal management on the battery before the vehicle runs to the starting position. According to the invention, thermal management can be carried out on the battery in advance, so that recoverable energy of the battery in an energy recovery section is improved in advance, and therefore, the hysteresis of thermal management is reduced, the frequency of automatic intervention of mechanical braking is reduced, and the boundary of a subsequent stroke is expanded.

Description

Technical Field

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

[0002] Traditional energy recovery strategies typically perform real-time calculations based on parameters such as vehicle speed, battery state of charge (SOC), and motor power requirements. However, when the battery is at high or low temperatures, or at a high SOC, the allowable regenerative power is significantly reduced. On long downhill slopes, the lower allowable regenerative power is insufficient to meet the continuous braking demand, leading to frequent friction braking (i.e., mechanical braking) intervention, increased wear on mechanical brake components, and the potential risk of brake system overheating. Summary of the Invention

[0003] The present invention provides a vehicle energy management method, device, equipment and medium to solve the technical problem of frequent intervention of mechanical brakes.

[0004] The present invention provides a vehicle energy management method, the method comprising: Identify the energy recovery section of the vehicle in the road ahead; predicting a first recoverable power of the vehicle in the energy recovery section based on basic parameters of the vehicle and road information of the energy recovery section; predicting a second recoverable power of the battery at the starting position based on current battery parameters and a change in the battery parameters from the current position of the vehicle to the starting position of the energy recovery section; If the second recyclable power is less than the first recyclable power, thermal management is performed on the battery before the vehicle travels to the starting position.

[0005] In one embodiment of the present invention, predicting the second recoverable power of the battery at the starting position based on the current battery parameters and the change in the battery parameters from the current position of the vehicle to the starting position of the energy recovery section includes: determining an estimated battery SOC at the starting position based on a current battery SOC and an estimated battery SOC change from the current position to the starting position; determining an estimated battery temperature at the starting position based on the current battery temperature and an estimated battery temperature change from the current position to the starting position; The second recoverable power is determined based on the estimated battery SOC, the estimated battery temperature, and a preset mapping relationship of battery SOC-battery temperature-battery recoverable power.

[0006] In one embodiment of the present invention, the estimated battery SOC change includes the battery SOC change caused by vehicle driving, the battery SOC change caused by thermal management, and the battery SOC change caused by battery self-discharge; the estimated battery temperature change includes the battery temperature change caused by thermal management, the battery temperature change caused by battery self-discharge, and the battery temperature change caused by heat exchange between the battery and the outside world.

[0007] In one embodiment of the present invention, if the second recoverable power is less than the first recoverable power, thermal management of the battery is performed before the vehicle travels to the starting position, including: If the second recoverable power is less than the first recoverable power, determining, based on the estimated battery SOC, the first recoverable power, and a mapping relationship between the battery SOC, the battery temperature, and the battery recoverable power, a target thermal management temperature for the battery to reach the first recoverable power at the estimated battery SOC; determining the thermal management energy consumption of the battery based on the target thermal management temperature, and determining the estimated recyclable energy of the energy recovery section based on the first recyclable power and the estimated driving time of the vehicle on the energy recovery section; If the thermal management energy consumption is less than or equal to the estimated recoverable energy of the energy recovery section, thermal management is performed on the battery before the vehicle travels to the starting position based on the target thermal management temperature.

[0008] In one embodiment of the present invention, the thermal management of the battery based on the target thermal management temperature before the vehicle travels to the starting position includes: updating the estimated battery SOC and the estimated battery temperature based on the target thermal management temperature, and determining an updated second recoverable power based on the updated estimated battery SOC and the estimated battery temperature; When the difference between the updated second recoverable power and the first recoverable power is greater than a first threshold, continuously iteratively updating the target thermal management temperature so that the target thermal management temperature gradually approaches the estimated battery temperature; determining, based on the iteratively updated target thermal management temperature, the iteratively updated second recoverable power until a difference between the second recoverable power after the kth iterative update and the first recoverable power is less than or equal to the first threshold; Based on the target thermal management temperature updated in the kth iteration, thermal management is performed on the battery before the vehicle travels to the starting position.

[0009] In one embodiment of the present invention, the difference between the second recoverable power and the first recoverable power after the k-th iterative update is less than or equal to the first threshold, including: Until the difference between the second recoverable power and the first recoverable power after the k-th iterative update is less than or equal to the first threshold, and the second recoverable power after the k-th iterative update is greater than or equal to a preset multiple of the first recoverable power, and the preset multiple is greater than 0.9 and less than 1.

[0010] In one embodiment of the present invention, the thermal management of the battery before the vehicle travels to the starting position includes: If determining the target thermal management temperature based on the estimated battery SOC, the first recoverable power, and the mapping relationship between the battery SOC, the battery temperature, and the battery recoverable power fails, or the thermal management energy consumption is greater than the estimated recoverable energy of the energy recovery section, determining the target thermal management temperature corresponding to the case where the estimated recoverable energy in the energy recovery section is used to thermally manage the battery; updating the estimated battery SOC and the estimated battery temperature based on the target thermal management temperature, determining an updated second recoverable power based on the updated estimated battery SOC and the estimated battery temperature, and determining an updated estimated recoverable energy of the battery based on the updated second recoverable power; When the difference between the updated thermal management energy consumption and the estimated recoverable energy of the battery is greater than a second threshold, continuously iteratively updating the second thermal management temperature so that the target thermal management temperature gradually approaches the estimated battery temperature; determining, based on the iteratively updated target thermal management temperature, the iteratively updated thermal management energy consumption and the estimated recoverable energy of the battery, until a difference between the iteratively updated thermal management energy consumption and the estimated recoverable energy of the battery is less than or equal to the second threshold value after the mth iterative update; Based on the target thermal management temperature updated in the mth iteration, thermal management is performed on the battery before the vehicle travels to the starting position.

[0011] In one embodiment of the present invention, the method further includes: If the second recyclable power is less than the first recyclable power and the iterative update of the target thermal management temperature fails, estimating whether the range extender of the vehicle is activated in the forward driving section; After starting and traveling to the starting position, the coolant of the engine is heated, wherein a heating power of the heating treatment is less than a difference between the first recoverable power and the second recoverable power.

[0012] The vehicle energy management device provided by the present invention includes: an identification module, for identifying an energy recovery section of the vehicle in a forward driving section; a first prediction module, configured to predict a first recoverable power of the vehicle in the energy recovery section based on basic parameters of the vehicle and road information of the energy recovery section; a second prediction module, configured to predict a second recoverable power of the battery at the starting position based on current battery parameters and a change in battery parameters from the current position of the vehicle to the starting position of the energy recovery section; A thermal management control module is configured to perform thermal management on the battery before the vehicle travels to the starting position if the second recoverable power is less than the first recoverable power.

[0013] The electronic device provided by the present invention includes: one or more processors; A storage device is used to store one or more programs, which, when executed by the one or more processors, enable the electronic device to implement the vehicle energy management method.

[0014] The computer-readable storage medium provided by the present invention stores a computer program thereon. When the computer program is executed by a processor of a computer, the computer is enabled to execute the vehicle energy management method.

[0015] Beneficial effects of the present invention: The present invention identifies the energy recovery section of the vehicle in the forward driving section, estimates the first recoverable power of the vehicle in the energy recovery section, and estimates the second recoverable power of the battery at the starting position of the energy recovery section. When the second recoverable power is less than the first recoverable power, the present invention performs battery thermal management in advance to consume the battery SOC and adjust the battery temperature, which can increase the second recoverable power of the battery at the starting position of the energy recovery section, thereby increasing the recoverable energy of the battery in the energy recovery section in advance and reducing the frequency of automatic intervention of mechanical braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are incorporated into and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and it is clear that those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0017] In the attached figure: Figure 1This is a flow chart of a vehicle energy management method provided by one embodiment of the present invention.

[0018] Figure 2 FIG. 1 is a block diagram of a vehicle energy management system according to an exemplary embodiment of the present invention.

[0019] Figure 3 FIG. 4 is a block diagram of a vehicle energy management device according to an exemplary embodiment of the present invention.

[0020] Figure 4 A schematic structural diagram of a computer system suitable for implementing an electronic device according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0021] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments. The details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. The following embodiments and features therein may be combined with one another without conflict.

[0022] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0023] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring the embodiments of the present invention.

[0024] In order to more clearly understand the embodiments of the present invention, the relevant contents of the present invention are described below.

[0025] During vehicle deceleration or braking, the traction motor is controlled to operate in generator mode, converting the vehicle's kinetic energy into electrical energy and storing it back in the vehicle's battery, thereby reclaiming the energy. When the battery's allowable recuperation power is low due to saturation or temperature limitations, and this low allowable recuperation power is insufficient to meet sustained braking demands (especially on long downhill slopes), conventional hydraulic friction brakes (i.e., mechanical brakes) automatically intervene to provide the necessary additional braking force. However, frequent mechanical brake intervention increases wear on mechanical brake components and may pose a risk of overheating the brake system.

[0026] To solve the above problems, the present invention provides a vehicle energy management method, device, equipment and medium. The vehicle energy management method of the present invention is first described below.

[0027] See Figure 1 , Figure 1 A flow chart of a vehicle energy management method provided by one embodiment of the present invention is shown in FIG. Figure 1 As shown, in an exemplary embodiment, the vehicle energy management method includes steps S110 to S140, which are described in detail as follows.

[0028] Step S110 , identifying an energy recovery section in the vehicle's forward driving section.

[0029] The above-mentioned energy recovery section is a section where frequent automatic mechanical braking may be required, such as a long downhill section. The embodiment of the present invention can be combined with a high-precision satellite navigation system to identify the road section ahead, and then determine the energy recovery section in combination with real-time traffic data.

[0030] Hereinafter, how to identify a long downhill section will be described by taking the energy recovery section as an example.

[0031] Embodiments of the present invention utilize a high-precision satellite navigation system (such as the Beidou system and the Global Positioning System) integrated with real-time traffic data to continuously scan road information within a preset route ahead according to a preset scanning cycle. This includes information such as the slope i (with an accuracy of ±0.5°), length L (with an accuracy of 10m), and speed limit information for each road segment. If a road segment within the preset route ahead has a slope i less than a slope threshold and a length L greater than a length threshold, the segment is identified as a long downhill section. Uphill sections have positive slopes, while downhill sections have negative slopes. Since the present invention identifies long downhill sections, the slope threshold is negative. The preset scanning cycle, preset route ahead, slope threshold, and length threshold are all calibrated. For example, the preset scanning cycle can be 10 seconds, the preset route ahead can be 20 km, the slope threshold can be -5%, and the length threshold can be 500 meters.

[0032] Step S120 : predicting a first recoverable power of the vehicle in the energy recovery section based on basic parameters of the vehicle and road information of the energy recovery section.

[0033] In this embodiment of the present invention, the above-mentioned basic parameters and road information can be substituted into the dynamics formula to determine the above-mentioned first recoverable power. The above-mentioned basic parameters include system recovery efficiency, vehicle weight, drag coefficient, rolling resistance coefficient, and frontal area, and the above-mentioned road information includes road slope and speed limit information.

[0034] Before explaining the above kinetic formula, the symbols, physical meanings, and units of the relevant parameters of the present invention are explained in the form of a table below.

[0035] Table 1 Parameter Description

[0036] The parameter symbols and definitions of the embodiments of the present invention can refer to the above table, and will not be described in detail later to avoid repetition.

[0037] The following is an exemplary kinetic formula for determining the first recoverable power: .

[0038] (1) In this embodiment, by substituting relevant basic vehicle parameters and road information into the above formula 1, the first recoverable power can be obtained: .in, The speed limit value of the energy recovery section can be adjusted Or the average speed of other vehicles passing through the energy recovery section For example, it can be determined by the following formula: (2) Step S130 , predicting a second recoverable power of the battery at the starting position based on current battery parameters and a change in battery parameters from the current position of the vehicle to the starting position of the energy recovery section.

[0039] The second recoverable power of the battery at the starting position is related to the estimated battery parameters at the starting position. Therefore, the embodiment of the present invention can determine the estimated battery parameters at the starting position based on the current battery parameters and the change in battery parameters from the current position to the starting position, and further determine the second recoverable power.

[0040] Step S140 : If the second recoverable power is less than the first recoverable power, thermal management is performed on the battery before the vehicle travels to the starting position.

[0041] If the second recyclable power is greater than or equal to the first recyclable power, the battery can completely recycle the recyclable energy generated in the above energy recyclable section, and mechanical braking usually does not automatically intervene, so there is no need to execute step S140.

[0042] If the second regenerative power is less than the first regenerative power, the battery cannot fully recapture the regenerative energy generated during the regenerative section, and mechanical braking may frequently intervene to provide the necessary additional braking force. Therefore, in this embodiment of the present invention, when the second regenerative power is less than the first regenerative power, thermal management of the battery can be performed before the vehicle reaches the starting position to consume the battery SOC and regulate the battery temperature, thereby increasing the second regenerative power of the battery at the initial position and reducing the frequency of mechanical braking intervention.

[0043] It's worth noting that in some embodiments, based on other thermal management rules, basic battery thermal management may be performed before the vehicle reaches its starting position, regardless of whether the second recyclable power is less than the first. Therefore, if basic battery thermal management is in place before the vehicle reaches its starting position, additional thermal management may be performed if the second recyclable power is less than the first. For example, if basic thermal management is heating to 10°C, additional thermal management may be performed to heat the battery to 13.5°C.

[0044] In this embodiment of the present invention, a regenerative section within a vehicle's upcoming travel section is identified, and a first recoverable power of the vehicle in the regenerative section and a second recoverable power of the battery at the starting point of the regenerative section are estimated. If the second recoverable power is less than the first recoverable power, proactive battery thermal management can be implemented in advance to consume the battery's state of charge (SOC) and adjust the battery temperature, thereby increasing the second recoverable power at the starting point of the regenerative section. This proactively increases the recoverable energy of the battery in the regenerative section. This helps reduce thermal management lag, lowers the frequency of automatic mechanical braking intervention, and expands the boundaries of subsequent travel.

[0045] In one embodiment of the present invention, the above step S130 includes: determining an estimated battery SOC at the starting position based on a current battery SOC and an estimated battery SOC change from the current position to the starting position; determining an estimated battery temperature at the starting position based on the current battery temperature and an estimated battery temperature change from the current position to the starting position; The second recoverable power is determined based on the estimated battery SOC, the estimated battery temperature, and a preset mapping relationship of battery SOC-battery temperature-battery recoverable power.

[0046] The second recoverable power is affected by the battery's SOC and temperature. Specifically, the recoverable power is lower at high SOC, low temperatures, and very high temperatures. Therefore, embodiments of the present invention determine the estimated battery SOC and temperature at the starting position, and combine these estimated battery SOC and temperature to further determine the second recoverable power, thereby improving the accuracy of the second recoverable power.

[0047] In one embodiment of the present invention, the estimated battery SOC change includes the battery SOC change caused by vehicle driving, the battery SOC change caused by thermal management, and the battery SOC change caused by battery self-discharge; the estimated battery temperature change includes the battery temperature change caused by thermal management, the battery temperature change caused by battery self-discharge, and the battery temperature change caused by heat exchange between the battery and the outside world.

[0048] In this embodiment, when the second recyclable power is initially determined (i.e., before the second recyclable power is updated), the battery SOC change due to thermal management may or may not be zero, depending on whether basic thermal management of the battery is performed before the vehicle reaches the starting position based on other thermal management rules. Specifically, if such basic thermal management is in place, the battery SOC change due to thermal management may be equal to the battery SOC change due to basic thermal management; otherwise, it is zero. Similarly, the temperature change due to thermal management may or may not be zero.

[0049] In order to more clearly understand the technical solutions in the embodiments of the present invention, the following provides an exemplary description of how to determine the estimated battery SOC and the estimated battery temperature at the starting position in combination with relevant formulas.

[0050] (3); = * * (4); (5); (6)(6); (7); = (8); (9); Where, The estimated battery SOC change is the SOC change caused by vehicle driving. , SOC change caused by thermal management , SOC change caused by battery self-discharge When calculating the second recoverable power for the first time, n is equal to 0. represents the original target thermal management temperature determined based on the other thermal management rules mentioned above, Indicates based on Thermal management energy consumption caused by thermal management.

[0051] Where, The estimated battery temperature change and the temperature change caused by thermal management are , Battery temperature change caused by heat exchange with the outside world And the temperature change caused by battery self-discharge When calculating the second recoverable power for the first time, n is equal to 0. Indicates based on The amount of battery temperature change caused by thermal management.

[0052] In an embodiment of the present invention, the above-mentioned estimated battery SOC change is determined by taking into account the battery SOC change caused by vehicle driving, thermal management and battery self-discharge, and the above-mentioned estimated battery temperature change is determined by taking into account the battery temperature change caused by thermal management, battery self-discharge and heat exchange between the battery and the outside world, which is beneficial to improving the accuracy of the estimated battery SOC change and the estimated battery temperature change.

[0053] In one embodiment of the present invention, if the second recoverable power is less than the first recoverable power, thermal management of the battery is performed before the vehicle travels to the starting position, including: If the second recoverable power is less than the first recoverable power, determining, based on the estimated battery SOC, the first recoverable power, and a mapping relationship between the battery SOC, the battery temperature, and the battery recoverable power, a target thermal management temperature for the battery to reach the first recoverable power at the estimated battery SOC; determining the thermal management energy consumption of the battery based on the target thermal management temperature, and determining the estimated recyclable energy of the energy recovery section based on the first recyclable power and the estimated driving time of the vehicle on the energy recovery section; If the thermal management energy consumption is less than or equal to the estimated recoverable energy of the energy recovery section, thermal management is performed on the battery before the vehicle travels to the starting position based on the target thermal management temperature.

[0054] In this embodiment, it is determined that the target thermal management temperature of the battery reaches the first recoverable power when the estimated battery SOC reaches the target thermal management temperature of the first recoverable power , based on the mapping relationship between thermal management temperature and actual thermal management power, it can be obtained ,Will and Substituting into the above formula 5, the thermal management energy consumption of the first active thermal management can be obtained .

[0055] Since the target thermal management temperature In order to estimate the thermal management temperature at which the first recoverable power is achieved under the battery SOC, the battery is based on the target thermal management temperature After thermal management, the battery can fully recover the estimated recoverable energy in the energy recovery section , It can be determined by the following formula: (10) (11) In the embodiment of the present invention, based on the target thermal management temperature After thermal management, the thermal management energy consumption will be Increase to , if thermal management energy consumption , the battery is based on After thermal management, the above can be fully recovered At the same time, its energy gain is greater than the thermal management energy loss. Based on this, the embodiment of the present invention is based on Thermal management can avoid mechanical braking intervention without causing additional energy loss.

[0056] In one embodiment of the present invention, the thermal management of the battery based on the target thermal management temperature before the vehicle travels to the starting position includes: updating the estimated battery SOC and the estimated battery temperature based on the target thermal management temperature, and determining an updated second recoverable power based on the updated estimated battery SOC and the estimated battery temperature; When the difference between the updated second recoverable power and the first recoverable power is greater than a first threshold, continuously iteratively updating the target thermal management temperature so that the target thermal management temperature gradually approaches the estimated battery temperature; determining, based on the iteratively updated target thermal management temperature, the iteratively updated second recoverable power until a difference between the second recoverable power after the kth iterative update and the first recoverable power is less than or equal to the first threshold; Based on the target thermal management temperature updated in the kth iteration, thermal management is performed on the battery before the vehicle travels to the starting position.

[0057] In this embodiment, based on After the first thermal management is performed, the SOC change and temperature change caused by the thermal management will be updated, which will cause the estimated battery SOC and the estimated battery temperature to be updated, and then cause the second recoverable power to be updated.

[0058] If the difference between the updated second recoverable power and the first recoverable power is greater than a first threshold (the first threshold is greater than or equal to 0), it indicates excessive thermal management, resulting in an excessive increase in the battery's recovery capacity and, in turn, increased thermal management energy consumption. Therefore, embodiments of the present invention can iteratively update the target thermal management temperature toward the estimated battery temperature to reduce the incremental thermal management energy consumption caused by the increase in the target thermal management temperature.

[0059] It is worth mentioning that the embodiment of the present invention controls the target thermal management temperature to be iteratively updated in the direction of the estimated battery temperature. It can be iteratively updated according to a fixed temperature step or iteratively updated according to a dynamic temperature step, for example, updated according to a gradient descending temperature step.

[0060] If the difference between the second recoverable power and the first recoverable power after the k-th iterative update is less than or equal to the first threshold, it indicates that the current second recoverable power is relatively close to the first recoverable power, the battery recovery capacity is good, and there is no excessive thermal management. Therefore, the iterative update can be stopped, and thermal management can be performed based on the target thermal management temperature after the k-th iterative update.

[0061] For ease of understanding, the following provides an exemplary description of how to perform iterative updating and how to stop iterative updating in conjunction with the formulas in the above embodiments.

[0062] In the embodiment of the present invention, when determining that the battery is within the estimated battery SOC ( ) to achieve the target thermal management temperature for the first recoverable power , and confirm the above Afterwards, perform an iterative calculation of A: Will Substituting into the above formula 5, the updated thermal management energy consumption can be obtained ( Can be achieved through Determine), and then substitute it into the above formula 3 to get the updated estimated battery SOC ( ).Will Substituting into the above formula 8, we can get the updated , and then substitute into the above formula 7 to obtain the updated estimated battery temperature ( ).based on and The updated second recoverable power can be obtained .

[0063] exist > ( is the first threshold), it means that after thermal management is performed according to the target thermal management temperature, the battery's recoverable power increases excessively, so the thermal management energy consumption can be further reduced. Based on this, the embodiment of the present invention > In the case of a fixed temperature step or a dynamic temperature step, the target thermal management temperature is brought close to Generates a new target thermal management temperature.

[0064] Repeat the iterative update of the target thermal management temperature until , k is the number of iterations, output , that is, the final target thermal management temperature .

[0065] In some embodiments, in order to further reduce the thermal management energy consumption, the above Can be equal to 0, that is The iterative update is stopped only when .

[0066] The present invention iteratively updates the target thermal management temperature through the above steps until it meets ,based on Early thermal management of the battery is conducive to achieving a balance between battery energy recovery and thermal management.

[0067] In one embodiment of the present invention, the step of: the difference between the second recoverable power and the first recoverable power after the k-th iterative update is less than or equal to the first threshold value includes: Until the difference between the second recoverable power and the first recoverable power after the k-th iterative update is less than or equal to the first threshold, and the second recoverable power after the k-th iterative update is greater than or equal to a preset multiple of the first recoverable power, and the preset multiple is greater than 0.9 and less than 1.

[0068] In this embodiment, a preset multiple b (greater than 0.9 and less than 1, for example, 0.95) is set while satisfying Iterative updates are stopped only when Too low will cause frequent intervention of mechanical brakes.

[0069] In one embodiment of the present invention, the thermal management of the battery before the vehicle travels to the starting position includes: If determining the target thermal management temperature based on the estimated battery SOC, the first recoverable power, and the mapping relationship between the battery SOC, the battery temperature, and the battery recoverable power fails, or the thermal management energy consumption is greater than the estimated recoverable energy of the energy recovery section, determining the target thermal management temperature corresponding to the case where the estimated recoverable energy in the energy recovery section is used to thermally manage the battery; updating the estimated battery SOC and the estimated battery temperature based on the target thermal management temperature, determining an updated second recoverable power based on the updated estimated battery SOC and the estimated battery temperature, and determining an updated estimated recoverable energy of the battery based on the updated second recoverable power; When the difference between the updated thermal management energy consumption and the estimated recoverable energy of the battery is greater than a second threshold, continuously iteratively updating the second thermal management temperature so that the target thermal management temperature gradually approaches the estimated battery temperature; determining, based on the iteratively updated target thermal management temperature, the iteratively updated thermal management energy consumption and the estimated recoverable energy of the battery, until a difference between the iteratively updated thermal management energy consumption and the estimated recoverable energy of the battery is less than or equal to the second threshold value after the mth iterative update; Based on the target thermal management temperature updated in the mth iteration, thermal management is performed on the battery before the vehicle travels to the starting position.

[0070] In this embodiment, if the mapping relationship between battery SOC, battery temperature and battery recoverable power does not exist, the battery temperature can make the battery recoverable power equal to , then the above target thermal management temperature fails to be determined. Therefore, the above iterative calculation A cannot be performed.

[0071] After successfully determining the target thermal management temperature through the above mapping relationship, In this case, it means that thermal management based on the target thermal management temperature will cause the thermal management energy consumption to be greater than the energy that can be recovered in the energy recovery section. , which is not conducive to vehicle endurance.

[0072] Based on the above, in the embodiment of the present invention, when the target thermal management temperature fails to be determined according to the mapping relationship of battery SOC-battery temperature-battery recoverable power, or when the target thermal management temperature is successfully determined through the above mapping relationship, In this case, the target thermal management temperature is determined according to another rule, and an iterative calculation B is performed, which is described below.

[0073] The embodiment of the present invention is As the first active thermal management energy consumption , calculate the estimated battery SOC after the first active thermal management ( ), and the estimated battery temperature after the first active thermal management ( ), re-iterate the mapping relationship to obtain the second recoverable power estimated by the battery , and based on and Reference The formula for determining the estimated recoverable energy of the battery is ,like > ( is the second threshold, which is greater than or equal to 0, and as an example, can be 0), with a fixed temperature step or a dynamic temperature step. near Generate new , and look up the table to get the new , while updating ,and , continue iterating until , m is the number of iterations, output , that is, the final target thermal management temperature .

[0074] In some embodiments, the above The value that can be taken is 0, that is, the iteration is stopped only when the recoverable energy of the battery is greater than or equal to the thermal management energy consumption, and the battery's gain in the energy recovery section is greater than or equal to the thermal management loss.

[0075] The embodiment of the present invention can obtain the above-mentioned Afterwards, according to , temperature change rate r (can be adjusted according to the available heating power confirmed) and estimated speed , calculate the heating starting point S.

[0076] S= ) / r(12) Based on the above heating starting point and target heating temperature Thermal management is now possible.

[0077] The above-mentioned thermal management of the battery before the vehicle travels to the starting position can be applied to pure electric vehicles and extended-range vehicles.

[0078] In some embodiments, if the iterative update of the above-mentioned target thermal management temperature fails, if the vehicle is an extended-range electric vehicle, the engine can also be thermally managed, which is described in detail below.

[0079] In one embodiment of the present invention, the method further includes: If the second recyclable power is less than the first recyclable power and the iterative update of the target thermal management temperature fails, estimating whether the range extender of the vehicle is activated in the forward driving section; After starting and traveling to the starting position, the coolant of the engine is heated, wherein a heating power of the heating treatment is less than a difference between the first recoverable power and the second recoverable power.

[0080] The above-mentioned iterative update of the target thermal management temperature fails, including the iterative update stop condition that cannot be met all the time. For example, in the above-mentioned iterative update A, the , in the above iterative update B, it is always impossible to satisfy .

[0081] If the iterative update of the target thermal management temperature fails, the battery SOC, vehicle mode, and total mileage information can be used to estimate whether the range extender will be activated in the upcoming driving section. If it is activated, the engine coolant can be actively heated in the energy recovery section, and the heating power can be constant. ,and The heating stop condition can be when the heating time reaches the long downhill time. , or reaches the set temperature (such as 60-70℃).

[0082] Through the above steps, the embodiment of the present invention can, on the one hand, use the engine coolant as an additional accessory to compensate for insufficient downhill recovery power, and on the other hand, improve the economy and emissions of the range extender when starting.

[0083] See also Figure 2 , Figure 2 This is a structural diagram of a vehicle energy management system provided by an embodiment of the present invention. Figure 2 As shown, the vehicle's energy management system includes: The navigation information acquisition module 210 is used to acquire road information and identify the energy recovery section in the vehicle's forward driving section.

[0084] Vehicle real-time parameter acquisition module 220 is used to obtain information such as battery SOC, battery temperature and ambient temperature. The central processing module 230 is used to receive the road information sent by the navigation information module and the information sent by the vehicle real-time parameter acquisition module when the navigation information acquisition module identifies the above-mentioned energy recovery section, and determine whether to perform thermal management based on energy management arbitration, and determine thermal management information, such as , heating starting point S and wait.

[0085] The thermal management control module 240 is used to receive thermal management information from the central processing module and perform thermal management.

[0086] In order to more clearly understand the technical solution of the present invention, a specific embodiment is provided below to exemplify the technical solution of the present invention.

[0087] Assume that a range-extended vehicle is traveling at 60 km / h on a straight road. The navigation information acquisition module 210 scans the 20 km ahead and detects a long downhill section with a slope i = -8% and a length L = 4000 m 15 km from the current position. This section meets the activation conditions for the energy recovery section, and the algorithm is activated.

[0088] Step I: The vehicle real-time parameter acquisition module 220 acquires , ambient temperature , current system thermal management power , the original target thermal management temperature of basic thermal management The central processing module obtains the speed limit information of the long downhill section , query the average speed of other vehicles on this road section through the Internet of Vehicles data platform , then the estimated speed of the long downhill slope is for .

[0089] Step II: The central processing module 230 performs thermal management calculations: Calculate estimated time to reach a long downhill slope .

[0090] According to the navigation, the distance between the vehicle's current position and the starting point of the long downhill slope is 15km. The estimated average speed is given based on the actual road conditions. for ,but:

[0091] Calculate driving energy consumption: Substitute basic parameters such as vehicle weight and wind resistance into the calculation: = * *

[0092] Calculate the original basic thermal management energy consumption: Substitute the actual operating parameters into the calculation. For example, if the temperature change rate is 0.015°C / s, the heating time is 333s.

[0093] *

[0094] Calculate the self-discharge loss energy consumption: According to the known test, the corresponding temperature and discharge current are obtained. For example, the power is 50W, and it is substituted into the following formula:

[0095] The estimated battery state of charge before a long downhill slope is calculated for the first time according to the following formula: Calculated as .

[0096]

[0097] The estimated battery temperature before a long downhill slope is calculated for the first time using the following formula: for .

[0098]

[0099] Calculate the recyclable power on a long downhill slope: Calculate based on vehicle parameters, such as 27kw.

[0100]

[0101] Calculate the recoverable energy of a long downhill slope: Calculate based on vehicle parameters, such as 5.5MJ.

[0102]

[0103]

[0104] Step III: Case 1, according to and Check the battery charge and discharge MAP table to get the second recoverable power It is 20kw.

[0105] to conduct arbitration, < , check the table There is a target thermal management temperature =15℃, the corresponding battery recoverable power is 27kw.

[0106] Calculation reaches of , perform iterative calculation A, and recalculate the estimated battery state of charge 87%, battery temperature is 15℃.

[0107] Estimate the battery state of charge based on the first iteration and Look up the table to get the updated second recoverable power It is 29kw.

[0108] Does not meet the conditions , with a step size of 0.5℃ near Generate new Continue iterating.

[0109] After 3 iterations, the final target thermal management temperature is obtained =13.5℃, at this time the estimated recovery power is 26.5kw.

[0110] According to the target heating temperature , temperature change rate r (based on the available heating power Get), estimated speed , calculate the thermal management starting point S: S= ) / r Case 2, when the long downhill distance is relatively short and the second recoverable power Low, or SOC is very high, it may appear , then based on Perform the first thermal management. Calculate the target thermal management temperature that can be achieved by heating: , look up the table to get the updated second recoverable power For 20kw, calculate , with a step size of 0.5℃ near Generate new , continue iterating until , get the final target thermal management temperature .

[0111] Case 3: When Case 1 and Case 2 cannot meet the iteration stop condition , and it is estimated that the range extender will be activated in the subsequent journey, then when reaching a long downhill slope, (such as 3kw, ) Heat the engine coolant, and the heating time is the time it takes to pass the long downhill slope Or the coolant temperature reaches the preset temperature (such as 70°C).

[0112] Step IV: The central processing module 230 sends the target thermal management temperature to the thermal management control module 240 , target thermal management power , thermal management starting point S, target coolant heating power , the thermal management control module executes according to the established control method.

[0113] The present invention determines the , which can balance energy consumption loss and benefits, and improve energy efficiency and energy recovery efficiency; the present invention can reduce the start-up emissions of the range extender and improve the economy of the range extender by actively heating the engine coolant; the present invention optimizes the mechanical brake start-up frequency under some long downhill conditions, and increases the life of the mechanical brake.

[0114] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0115] Figure 3 FIG. 1 is a block diagram of an energy management device for a vehicle according to an exemplary embodiment of the present invention. Figure 3 As shown, the exemplary vehicle energy management device includes: an identification module, for identifying an energy recovery section of the vehicle in a forward driving section; A first prediction module 310 is configured to predict a first recoverable power of the vehicle in the energy recovery section based on basic parameters of the vehicle and road information of the energy recovery section; a second prediction module 320 for predicting a second recoverable power of the battery at the starting position based on current battery parameters and a change in battery parameters from the current position of the vehicle to the starting position of the energy recovery section; The thermal management control module 330 is configured to perform thermal management on the battery before the vehicle travels to the starting position if the second recoverable power is less than the first recoverable power.

[0116] In one embodiment of the present invention, the second prediction module 320 is specifically configured to: determining an estimated battery SOC at the starting position based on a current battery SOC and an estimated battery SOC change from the current position to the starting position; determining an estimated battery temperature at the starting position based on the current battery temperature and an estimated battery temperature change from the current position to the starting position; The second recoverable power is determined based on the estimated battery SOC, the estimated battery temperature, and a preset mapping relationship of battery SOC-battery temperature-battery recoverable power.

[0117] In one embodiment of the present invention, the estimated battery SOC change includes the battery SOC change caused by vehicle driving, the battery SOC change caused by thermal management, and the battery SOC change caused by battery self-discharge; the estimated battery temperature change includes the battery temperature change caused by thermal management, the battery temperature change caused by battery self-discharge, and the battery temperature change caused by heat exchange between the battery and the outside world.

[0118] In one embodiment of the present invention, the thermal management control module 330 is specifically configured to: If the second recoverable power is less than the first recoverable power, determining, based on the estimated battery SOC, the first recoverable power, and a mapping relationship between the battery SOC, the battery temperature, and the battery recoverable power, a target thermal management temperature for the battery to reach the first recoverable power at the estimated battery SOC; determining the thermal management energy consumption of the battery based on the target thermal management temperature, and determining the estimated recyclable energy of the energy recovery section based on the first recyclable power and the estimated driving time of the vehicle on the energy recovery section; If the thermal management energy consumption is less than or equal to the estimated recoverable energy of the energy recovery section, thermal management is performed on the battery before the vehicle travels to the starting position based on the target thermal management temperature.

[0119] In one embodiment of the present invention, the thermal management control module 330 is further configured to: updating the estimated battery SOC and the estimated battery temperature based on the target thermal management temperature, and determining an updated second recoverable power based on the updated estimated battery SOC and the estimated battery temperature; When the difference between the updated second recoverable power and the first recoverable power is greater than a first threshold, continuously iteratively updating the target thermal management temperature so that the target thermal management temperature gradually approaches the estimated battery temperature; determining, based on the iteratively updated target thermal management temperature, the iteratively updated second recoverable power until a difference between the second recoverable power after the kth iterative update and the first recoverable power is less than or equal to the first threshold; Based on the target thermal management temperature updated in the kth iteration, thermal management is performed on the battery before the vehicle travels to the starting position.

[0120] In one embodiment of the present invention, the difference between the second recoverable power and the first recoverable power after the k-th iterative update is less than or equal to the first threshold, including: Until the difference between the second recoverable power and the first recoverable power after the k-th iterative update is less than or equal to the first threshold, and the second recoverable power after the k-th iterative update is greater than or equal to a preset multiple of the first recoverable power, and the preset multiple is greater than 0.9 and less than 1.

[0121] In one embodiment of the present invention, the thermal management control module 330 is further configured to: If determining the target thermal management temperature based on the estimated battery SOC, the first recoverable power, and the mapping relationship between the battery SOC, the battery temperature, and the battery recoverable power fails, or the thermal management energy consumption is greater than the estimated recoverable energy of the energy recovery section, determining the target thermal management temperature corresponding to the case where the estimated recoverable energy in the energy recovery section is used to thermally manage the battery; updating the estimated battery SOC and the estimated battery temperature based on the target thermal management temperature, determining an updated second recoverable power based on the updated estimated battery SOC and the estimated battery temperature, and determining an updated estimated recoverable energy of the battery based on the updated second recoverable power; When the difference between the updated thermal management energy consumption and the estimated recoverable energy of the battery is greater than a second threshold, continuously iteratively updating the second thermal management temperature so that the target thermal management temperature gradually approaches the estimated battery temperature; determining, based on the iteratively updated target thermal management temperature, the iteratively updated thermal management energy consumption and the estimated recoverable energy of the battery, until a difference between the iteratively updated thermal management energy consumption and the estimated recoverable energy of the battery is less than or equal to the second threshold value after the mth iterative update; Based on the target thermal management temperature updated in the mth iteration, thermal management is performed on the battery before the vehicle travels to the starting position.

[0122] In one embodiment of the present invention, the thermal management control module 330 is further configured to: If the second recyclable power is less than the first recyclable power and the iterative update of the target thermal management temperature fails, estimating whether the range extender of the vehicle is activated in the forward driving section; After starting and traveling to the starting position, the coolant of the engine is heated, wherein a heating power of the heating treatment is less than a difference between the first recoverable power and the second recoverable power.

[0123] It should be noted that the vehicle energy management device provided in the above-mentioned embodiment and the vehicle energy management method provided in the above-mentioned embodiment are based on the same concept. The specific manner in which each module and unit performs operations has been described in detail in the method embodiment and will not be repeated here. In actual applications, the vehicle energy management device provided in the above-mentioned embodiment can distribute the above-mentioned functions to different functional modules as needed, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0124] An embodiment of the present invention also provides an electronic device comprising: one or more processors; a storage device for storing one or more programs, wherein when the one or more programs are executed by the one or more processors, the electronic device implements the vehicle energy management method provided in the above-mentioned embodiments.

[0125] Figure 4 FIG1 shows a schematic diagram of the structure of a computer system suitable for implementing an electronic device according to an embodiment of the present invention. Figure 4 The computer system 400 of the electronic device shown is only an example and should not limit the functions and scope of use of the embodiments of the present invention.

[0126] like Figure 4 As shown, computer system 400 includes a central processing unit (CPU) 401, which can perform various appropriate actions and processes, such as the methods described in the above embodiments, based on programs stored in read-only memory (ROM) 402 or programs loaded from storage 408 into random access memory (RAM) 403. RAM 403 also stores various programs and data required for system operation. CPU 401, ROM 402, and RAM 403 are interconnected via bus 404. An input / output (I / O) interface 405 is also connected to bus 404.

[0127] The following components are connected to the I / O interface 405: an input section 406 including a keyboard, mouse, and the like; an output section 407 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and speakers; a storage section 408 including devices such as a hard disk; and a communication section 409 including a network interface card such as a LAN (Local Area Network) card or a modem. The communication section 409 performs communication processing via a network such as the Internet. A drive 410 is also connected to the I / O interface 405 as needed. Removable media 411, such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory, is installed in the drive 410 as needed, so that computer programs read from the media can be installed in the storage section 408 as needed.

[0128] In particular, according to embodiments of the present invention, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for executing the methods illustrated in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 409 and / or installed from removable media 411. When executed by central processing unit (CPU) 401, the computer program performs the various functions defined in the system of the present invention.

[0129] It should be noted that the computer-readable medium described in the embodiments of the present invention may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may, for example, be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. This propagated data signal may take various forms, including, but not limited to, an electromagnetic signal, an optical signal, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. A computer program embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, or any suitable combination thereof.

[0130] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions and operations of the systems, methods and computer program products according to various embodiments of the present invention. Each box in the flowchart or block diagram can represent a module, program segment, or part of the code, and the above-mentioned module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the boxes can also occur in an order different from that marked in the accompanying drawings. For example, two boxes shown in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or can be implemented using a combination of dedicated hardware and computer instructions.

[0131] The units involved in the embodiments of the present invention may be implemented in software or hardware, and the units described may also be provided in a processor. In some cases, the names of these units do not limit the units themselves.

[0132] Another aspect of the present invention provides a computer-readable storage medium storing a computer program. When executed by a computer processor, the computer program causes the computer to perform the vehicle energy management method described above. The computer-readable storage medium may be included in the electronic device described in the above embodiments, or may exist independently and not be incorporated into the electronic device.

[0133] Another aspect of the present invention provides a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to implement the vehicle energy management method provided in each of the above-described embodiments.

[0134] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, any equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A vehicle energy management method, characterized in that: The method comprises: Identify the energy recovery section of the vehicle in the road ahead; predicting a first recoverable power of the vehicle in the energy recovery section based on basic parameters of the vehicle and road information of the energy recovery section; predicting a second recoverable power of the battery at the starting position based on current battery parameters and a change in the battery parameters from the current position of the vehicle to the starting position of the energy recovery section; If the second recyclable power is less than the first recyclable power, thermal management is performed on the battery before the vehicle travels to the starting position.

2. The vehicle energy management method according to claim 1, characterized in that: The predicting, based on current battery parameters and a change in battery parameters from the current position of the vehicle to the starting position of the energy recovery section, a second recoverable power of the battery at the starting position includes: determining an estimated battery SOC at the starting position based on a current battery SOC and an estimated battery SOC change from the current position to the starting position; determining an estimated battery temperature at the starting position based on the current battery temperature and an estimated battery temperature change from the current position to the starting position; The second recoverable power is determined based on the estimated battery SOC, the estimated battery temperature, and a preset mapping relationship of battery SOC-battery temperature-battery recoverable power.

3. The vehicle energy management method according to claim 2, characterized in that: The estimated battery SOC change includes the battery SOC change caused by vehicle driving, the battery SOC change caused by thermal management, and the battery SOC change caused by battery self-discharge. The estimated battery temperature change includes the battery temperature change caused by thermal management, the battery temperature change caused by battery self-discharge, and the battery temperature change caused by heat exchange between the battery and the outside world.

4. The vehicle energy management method according to claim 2 or 3, characterized in that: If the second recoverable power is less than the first recoverable power, thermal management of the battery is performed before the vehicle travels to the starting position, comprising: If the second recoverable power is less than the first recoverable power, determining, based on the estimated battery SOC, the first recoverable power, and a mapping relationship between the battery SOC, the battery temperature, and the battery recoverable power, a target thermal management temperature for the battery to reach the first recoverable power at the estimated battery SOC; determining the thermal management energy consumption of the battery based on the target thermal management temperature, and determining the estimated recyclable energy of the energy recovery section based on the first recyclable power and the estimated driving time of the vehicle on the energy recovery section; If the thermal management energy consumption is less than or equal to the estimated recoverable energy of the energy recovery section, thermal management is performed on the battery before the vehicle travels to the starting position based on the target thermal management temperature.

5. The vehicle energy management method according to claim 4, characterized in that: The thermal management of the battery based on the target thermal management temperature before the vehicle travels to the starting position includes: updating the estimated battery SOC and the estimated battery temperature based on the target thermal management temperature, and determining an updated second recoverable power based on the updated estimated battery SOC and the estimated battery temperature; When the difference between the updated second recoverable power and the first recoverable power is greater than a first threshold, continuously iteratively updating the target thermal management temperature so that the target thermal management temperature gradually approaches the estimated battery temperature; determining, based on the iteratively updated target thermal management temperature, the iteratively updated second recoverable power until a difference between the second recoverable power after the kth iterative update and the first recoverable power is less than or equal to the first threshold; Based on the target thermal management temperature updated in the kth iteration, thermal management is performed on the battery before the vehicle travels to the starting position.

6. The vehicle energy management method according to claim 5, characterized in that: The step of: the step of: the difference between the second recoverable power and the first recoverable power after the k-th iterative update being less than or equal to the first threshold value comprising: Until the difference between the second recoverable power and the first recoverable power after the k-th iterative update is less than or equal to the first threshold, and the second recoverable power after the k-th iterative update is greater than or equal to a preset multiple of the first recoverable power, and the preset multiple is greater than 0.9 and less than 1.

7. The vehicle energy management method according to claim 4, characterized in that: The thermal management of the battery before the vehicle travels to the starting position includes: If determining the target thermal management temperature based on the estimated battery SOC, the first recoverable power, and the mapping relationship between the battery SOC, the battery temperature, and the battery recoverable power fails, or the thermal management energy consumption is greater than the estimated recoverable energy of the energy recovery section, determining the target thermal management temperature corresponding to the case where the estimated recoverable energy in the energy recovery section is used to thermally manage the battery; updating the estimated battery SOC and the estimated battery temperature based on the target thermal management temperature, determining an updated second recoverable power based on the updated estimated battery SOC and the estimated battery temperature, and determining an updated estimated recoverable energy of the battery based on the updated second recoverable power; When the difference between the updated thermal management energy consumption and the estimated recoverable energy of the battery is greater than a second threshold, continuously iteratively updating the second thermal management temperature so that the target thermal management temperature gradually approaches the estimated battery temperature; determining, based on the iteratively updated target thermal management temperature, the iteratively updated thermal management energy consumption and the estimated recoverable energy of the battery, until a difference between the iteratively updated thermal management energy consumption and the estimated recoverable energy of the battery is less than or equal to the second threshold value after the mth iterative update; Based on the target thermal management temperature updated in the mth iteration, thermal management is performed on the battery before the vehicle travels to the starting position.

8. The vehicle energy management method according to any one of claims 5 to 7, characterized in that: The method further comprises: If the second recyclable power is less than the first recyclable power and the iterative update of the target thermal management temperature fails, estimating whether the range extender of the vehicle is activated in the forward driving section; After starting and traveling to the starting position, the coolant of the engine is heated, wherein a heating power of the heating treatment is less than a difference between the first recoverable power and the second recoverable power.

9. A vehicle energy management device, characterized in that: include: an identification module, for identifying an energy recovery section of the vehicle in a forward driving section; a first prediction module, configured to predict a first recoverable power of the vehicle in the energy recovery section based on basic parameters of the vehicle and road information of the energy recovery section; a second prediction module, configured to predict a second recoverable power of the battery at the starting position based on current battery parameters and a change in battery parameters from the current position of the vehicle to the starting position of the energy recovery section; A thermal management control module is configured to perform thermal management on the battery before the vehicle travels to the starting position if the second recoverable power is less than the first recoverable power.

10. A computer-readable storage medium, characterized in that A computer program is stored thereon, which, when executed by one or more processors, causes the device to perform the vehicle energy management method according to any one of claims 1 to 8.

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