Power battery, power MAP generation method, device and vehicle thereof

Abstract

The present invention discloses a power battery, a method and device for generating a power MAP, and a vehicle thereof. The method includes: dividing the power battery into regions based on its temperature range and state of charge; and determining the power MAP values ​​for different regions using different calculation strategies based on the power battery's single-cell lower voltage limit and / or single-cell rated voltage. Thus, by dividing the regions and using different calculation strategies to determine the power MAP values ​​for each divided region, the estimated power MAP can be closer to the actual power MAP, thereby facilitating the evaluation of the vehicle's power and economy.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to a power battery and a method and device for generating a power MAP thereof, as well as a vehicle. Background Art

[0002] Currently, when evaluating the power MAP (table) of a power battery, that is, when evaluating the power of a power battery at different SOCs (State of Charge) and temperatures, the power MAP is usually determined by using the method of single-cell rated voltage * number of cell strings * system instantaneous current or single-cell lower limit voltage * number of cell strings * system instantaneous current. However, in the former, when the SOC is low, the actual voltage of the single cell is likely to be lower than the rated voltage of the single cell, resulting in the actual power being lower than the estimated power given in the MAP table. The problem with the latter is that since the selected single-cell lower limit voltage is lower than the single-cell rated voltage, the power value calculated in the MAP table is too low, resulting in a discrepancy between the power MAP evaluation value and the actual power MAP value, which is not conducive to the evaluation of the vehicle's power and economy. Summary of the Invention

[0003] The present invention aims to at least partially address one of the technical problems in the related art. To this end, the first object of the present invention is to provide a method for generating a power MAP for a power battery. This method divides the power MAP into different regions and uses different calculation strategies to determine the power MAP value for each region. This method can make the estimated power MAP closer to the actual power MAP, thereby improving the evaluation of the vehicle's power and economy.

[0004] A second objective of the present invention is to provide a power MAP generating device for a power battery.

[0005] The third object of the present invention is to provide a power battery.

[0006] A fourth object of the present invention is to provide a vehicle.

[0007] To achieve the above-mentioned objectives, an embodiment of the first aspect of the present invention proposes a method for generating a power MAP of a power battery, the method comprising: dividing the power battery into regions according to its temperature range and state of charge; and determining the power MAP value of the power MAP using different calculation strategies for different regions according to the single-cell lower limit voltage and / or single-cell rated voltage of the power battery.

[0008] The power MAP generation method for a power battery according to an embodiment of the present invention divides the power battery into regions based on its temperature range and state of charge. Different calculation strategies are then used to determine the power MAP values ​​for each region, based on the power battery's single-cell minimum voltage and / or single-cell rated voltage. Thus, by dividing the region into different regions and using different calculation strategies to determine the power MAP values ​​for each region, the estimated power MAP can be closer to the actual power MAP, thereby facilitating the evaluation of vehicle power and economy.

[0009] According to one embodiment of the present invention, regional division is performed according to the temperature range and state of charge of the power battery, including: determining temperature division points within a preset temperature range according to the characteristics of the power battery; determining state of charge division points within a preset state of charge range according to discharge data of the power battery; and performing regional division according to the temperature division points and the state of charge division points.

[0010] According to one embodiment of the present invention, when the power MAP is a continuous power MAP, the discharge data is 1 / 3C to 1C rate discharge data; when the power MAP is a peak power MAP, the discharge data is 2C to 4C rate discharge data.

[0011] According to one embodiment of the present invention, regional division is performed according to a temperature division point and a state of charge division point, including: if the temperature of the power battery is greater than or equal to the temperature division point and the state of charge of the power battery is greater than or equal to the state of charge division point, it is a first region; if the temperature of the power battery is greater than or equal to the temperature division point and the state of charge of the power battery is less than the state of charge division point, it is a second region; if the temperature of the power battery is less than the temperature division point and the state of charge of the power battery is greater than or equal to the state of charge division point, it is a third region; if the temperature of the power battery is less than the temperature division point and the state of charge of the power battery is less than the state of charge division point, it is a fourth region.

[0012] According to one embodiment of the present invention, when the power MAP is a continuous power MAP, different calculation strategies are adopted for different regions to determine the power MAP value of the power MAP based on the single-cell lower limit voltage and / or the single-cell rated voltage of the power battery, including: if it is the first region, the power MAP value is determined based on the single-cell rated voltage, the number of cell strings of the power battery and the instantaneous current of the system; if it is the second region, the power MAP value is determined based on the single-cell lower limit voltage, the number of cell strings and the instantaneous current of the system; if it is the third region, the power MAP value is determined based on the first voltage, the number of cell strings and the instantaneous current of the system, and the first voltage is between the single-cell lower limit voltage and the single-cell rated voltage; if it is the fourth region, the power MAP value is determined based on the second voltage, the number of cell strings and the instantaneous current of the system, and the second voltage is less than the single-cell lower limit voltage.

[0013] According to one embodiment of the present invention, when the power MAP is the peak power MAP, the power MAP value of the power MAP is determined according to the single-cell lower limit voltage and / or the single-cell rated voltage of the power battery, using different calculation strategies for different regions, including: if it is the first region, the power MAP value is determined according to the third voltage, the number of cell strings of the power battery and the instantaneous current of the system, the third voltage is determined according to the 2C~4C rate discharge data of the power battery, and the third voltage is less than or equal to the single-cell rated voltage; if it is the second region, the power MAP value is determined according to the single-cell lower limit voltage, the number of cell strings and the instantaneous current of the system; if it is the third region, the power MAP value is determined according to the fourth voltage, the number of cell strings and the instantaneous current of the system, the fourth voltage is determined according to the 2C~4C rate discharge data of the power battery, and the fourth voltage is between the single-cell lower limit voltage and the single-cell rated voltage; if it is the fourth region, the power MAP value is determined according to the fifth voltage, the number of cell strings and the instantaneous current of the system, and the fifth voltage is less than the single-cell lower limit voltage.

[0014] To achieve the above-mentioned objectives, the second embodiment of the present invention proposes a power MAP generation device for a power battery, the device including: a region division module for dividing the power battery into regions according to the temperature range and state of charge; a calculation module for determining the power MAP value of the power MAP using different calculation strategies for different regions based on the single-cell lower limit voltage and / or single-cell rated voltage of the power battery.

[0015] According to an embodiment of the present invention, a power battery power MAP generation device uses a region division module to divide the power battery into regions based on its temperature range and state of charge. Furthermore, a calculation module uses different calculation strategies to determine the power MAP values ​​for different regions based on the power battery's single-cell minimum voltage and / or single-cell rated voltage. Thus, by dividing the regions and using different calculation strategies to determine the power MAP values ​​for each region, the estimated power MAP can be closer to the actual power MAP, thereby further facilitating the evaluation of vehicle power and economy.

[0016] To achieve the above-mentioned objective, a third embodiment of the present invention provides a power battery, including the power MAP generating device of the power battery described above.

[0017] According to the power battery of an embodiment of the present invention, through the power MAP generating device of the power battery described above, by dividing the power MAP into different areas and adopting different calculation strategies for each of the divided areas to determine the power MAP value, the estimated power MAP can be made closer to the actual power MAP, thereby being more conducive to the evaluation of the power and economy of the whole vehicle.

[0018] To achieve the above-mentioned objectives, a fourth embodiment of the present invention provides a vehicle comprising the above-mentioned power battery.

[0019] According to the vehicle of the embodiment of the present invention, by using the above-mentioned power battery, the power MAP value is determined by dividing the power battery into different areas and adopting different calculation strategies for each of the divided areas. This can make the estimated power MAP closer to the actual power MAP, thereby being more conducive to the evaluation of the power and economy of the entire vehicle.

[0020] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a flowchart of a method for generating a power MAP of a power battery according to one embodiment of the present invention;

[0022] Figure 2 This is a flowchart of dividing regions according to the temperature range and state of charge of a power battery according to one embodiment of the present invention;

[0023] Figure 3 FIG. 1 is a schematic structural diagram of a power MAP generating device for a power battery according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following describes embodiments of the present invention in detail, 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 are not to be construed as limiting the present invention.

[0025] The following describes a power battery, a method for generating a power MAP thereof, an apparatus, and a vehicle according to an embodiment of the present invention with reference to the accompanying drawings.

[0026] Figure 1 FIG. 1 is a flow chart of a method for generating a power MAP of a power battery according to an embodiment of the present invention. Figure 1 As shown, the power MAP generation method of the power battery includes the following steps:

[0027] Step S101 : dividing the power battery into regions according to the temperature range and state of charge.

[0028] It should be noted that the power battery temperature and state of charge are important factors affecting the power battery power MAP evaluation. The power battery temperature and state of charge are always in a changing state during the operation of the vehicle. The actual power battery power MAP corresponding to different power battery temperatures and states of charge vary greatly. A single power battery power MAP evaluation method is difficult to meet the current evaluation needs. Therefore, it is necessary to divide the areas according to different power battery temperatures and states of charge to achieve accurate evaluation.

[0029] In some embodiments, as Figure 2 As shown, the area division is performed according to the temperature range and state of charge of the power battery, including the following steps:

[0030] Step S201 : determining a temperature dividing point within a preset temperature range according to the characteristics of the power battery.

[0031] Specifically, different power batteries have different characteristics. It is necessary to determine a temperature cutoff point suitable for the power battery within a preset temperature range based on the characteristics of the power battery to maximize the accuracy of the temperature cutoff point, thereby making the estimated battery power MAP closer to the actual battery power MAP. Optionally, the preset temperature range is 0°C to 10°C. In other words, a temperature value consistent with the characteristics of the power battery can be selected from the range of 0°C to 10°C as the temperature cutoff point for the power battery.

[0032] Step S202 : determining a state of charge dividing point within a preset state of charge range according to the discharge data of the power battery.

[0033] Specifically, power batteries have different discharge data at different discharge stages. It is necessary to determine an appropriate SOC demarcation point within a preset SOC range based on the discharge data from the power battery at different discharge stages. This maximizes the accuracy of the SOC demarcation point, thereby ensuring that the estimated battery power MAP is closer to the actual battery power MAP. Optionally, the preset SOC range is 20% SOC to 40% SOC, where SOC represents the state of charge. In other words, a charge value within the 20% to 40% SOC range that is consistent with the power battery's discharge data can be selected as the SOC demarcation point for the power battery.

[0034] In some embodiments, when the power MAP is a continuous power MAP, the discharge data is 1 / 3C to 1C rate discharge data; when the power MAP is a peak power MAP, the discharge data is 2C to 4C rate discharge data.

[0035] Specifically, when the power MAP of the power battery is the continuous power MAP, the discharge data at the battery discharge rate of 1 / 3C to 1C is referred to, and based on this discharge data, a suitable state of charge dividing point is selected from the state of charge range of 20% to 40%; when the power MAP of the power battery is the peak power MAP, the discharge data at the battery discharge rate of 2C to 4C is referred to, and based on this discharge data, a suitable state of charge dividing point is selected from the state of charge range of 20% to 40%, thereby enabling the power battery to determine the suitable state of charge dividing point according to the discharge data at different discharge stages.

[0036] Step S203 , dividing the area according to the temperature dividing point and the state of charge dividing point.

[0037] Specifically, the area division is performed according to the selected temperature division point and the state of charge division point, and the selection of the state of charge division point is related to whether the power MAP is a continuous power MAP or a peak power MAP. That is, when the power MAP is a continuous power MAP, the area division can be performed according to the temperature division point and the state of charge division point determined corresponding to the continuous power MAP, or, when the power MAP is a peak power MAP, the area division can be performed according to the temperature division point and the state of charge division point determined corresponding to the peak power MAP.

[0038] In some embodiments, regional division is performed based on a temperature dividing point and a state of charge dividing point, including: if the temperature of the power battery is greater than or equal to the temperature dividing point and the state of charge of the power battery is greater than or equal to the state of charge dividing point, it is a first region; if the temperature of the power battery is greater than or equal to the temperature dividing point and the state of charge of the power battery is less than the state of charge dividing point, it is a second region; if the temperature of the power battery is less than the temperature dividing point and the state of charge of the power battery is greater than or equal to the state of charge dividing point, it is a third region; if the temperature of the power battery is less than the temperature dividing point and the state of charge of the power battery is less than the state of charge dividing point, it is a fourth region.

[0039] Specifically, when the power MAP is a continuous power MAP, a suitable state-of-charge dividing point is selected from the state-of-charge range of 20% to 40% according to the discharge data when the discharge rate is 1 / 3C to 1C, and four regions can be divided according to the determined temperature dividing point and the state-of-charge dividing point, namely, a first region in which the temperature of the power battery is greater than or equal to the temperature dividing point and the state of charge of the power battery is greater than or equal to the state-of-charge dividing point, a second region in which the temperature of the power battery is greater than or equal to the temperature dividing point and the state of charge of the power battery is less than the state-of-charge dividing point, a third region in which the temperature of the power battery is less than the temperature dividing point and the state of charge of the power battery is greater than or equal to the state-of-charge dividing point, and a fourth region in which the temperature of the power battery is less than the temperature dividing point and the state of charge of the power battery is less than the state-of-charge dividing point.

[0040] When the power MAP is the peak power MAP, a suitable state-of-charge dividing point is selected from the state-of-charge range of 20% to 40% according to the discharge data when the discharge rate is 2C to 4C. Four regions can be divided according to the determined temperature dividing point and the state-of-charge dividing point, namely, a first region in which the temperature of the power battery is greater than or equal to the temperature dividing point and the state of charge of the power battery is greater than or equal to the state-of-charge dividing point, a second region in which the temperature of the power battery is greater than or equal to the temperature dividing point and the state of charge of the power battery is less than the state-of-charge dividing point, a third region in which the temperature of the power battery is less than the temperature dividing point and the state of charge of the power battery is greater than or equal to the state-of-charge dividing point, and a fourth region in which the temperature of the power battery is less than the temperature dividing point and the state of charge of the power battery is less than the state-of-charge dividing point.

[0041] Step S102 : determining a power MAP value of the power MAP by adopting different calculation strategies for different regions according to the single-cell lower voltage limit and / or the single-cell rated voltage of the power battery.

[0042] Specifically, different calculation methods can be used to determine the power MAP value of the power MAP for the four different areas divided according to the temperature division point and the state of charge division point to improve the accuracy of the power MAP evaluation. The choice of calculation method is related to the single-cell lower limit voltage and / or single-cell rated voltage of the power battery. The power MAP value of the power MAP can be calculated only based on the single-cell lower limit voltage of the power battery, or only based on the single-cell rated voltage of the power battery. The power MAP value of the power MAP can also be determined by comprehensively considering the single-cell lower limit voltage and the single-cell rated voltage of the power battery.

[0043] In some embodiments, when the power MAP is a continuous power MAP, different calculation strategies are used for different regions to determine the power MAP value of the power MAP based on the single-cell lower limit voltage and / or the single-cell rated voltage of the power battery, including: if it is the first region, the power MAP value is determined based on the single-cell rated voltage, the number of cell strings of the power battery and the instantaneous current of the system; if it is the second region, the power MAP value is determined based on the single-cell lower limit voltage, the number of cell strings and the instantaneous current of the system; if it is the third region, the power MAP value is determined based on the first voltage, the number of cell strings and the instantaneous current of the system, and the first voltage is between the single-cell lower limit voltage and the single-cell rated voltage; if it is the fourth region, the power MAP value is determined based on the second voltage, the number of cell strings and the instantaneous current of the system, and the second voltage is less than the single-cell lower limit voltage.

[0044] That is to say, when the power MAP is a continuous power MAP, if the temperature and state of charge of the power battery are in the first range, the power MAP value is calculated according to the method of single-cell rated voltage * number of cell strings * system instantaneous current; if the temperature and state of charge of the power battery are in the second range, the power MAP value is calculated according to the method of single-cell lower limit voltage * number of cell strings * system instantaneous current; if the temperature and state of charge of the power battery are in the third range, a first voltage X1 is selected between the single-cell lower limit voltage and the single-cell rated voltage, and the power MAP value is calculated according to the method of first voltage X1 * number of cell strings * system instantaneous current; if the temperature and state of charge of the power battery are in the fourth range, a voltage less than the single-cell lower limit voltage is taken as the second voltage X2, and the power MAP value is calculated according to the method of second voltage X2 * number of cell strings * system instantaneous current. Therefore, when the power MAP is a continuous power MAP, by dividing the continuous power MAP into different regions and using different calculation methods to evaluate the continuous power MAP, the evaluated continuous power MAP can be made closer to the actual continuous power MAP.

[0045] In some embodiments, when the power MAP is the peak power MAP, the power MAP value of the power MAP is determined according to the single-cell lower limit voltage and / or the single-cell rated voltage of the power battery, using different calculation strategies for different regions, including: if it is the first region, the power MAP value is determined according to the third voltage, the number of cell strings of the power battery and the instantaneous current of the system, the third voltage is determined according to the 2C~4C rate discharge data of the power battery, and the third voltage is less than or equal to the single-cell rated voltage; if it is the second region, the power MAP value is determined according to the single-cell lower limit voltage, the number of cell strings and the instantaneous current of the system; if it is the third region, the power MAP value is determined according to the fourth voltage, the number of cell strings and the instantaneous current of the system, the fourth voltage is determined according to the 2C~4C rate discharge data of the power battery, and the fourth voltage is between the single-cell lower limit voltage and the single-cell rated voltage; if it is the fourth region, the power MAP value is determined according to the fifth voltage, the number of cell strings and the instantaneous current of the system, and the fifth voltage is less than the single-cell lower limit voltage.

[0046] That is to say, when the power MAP is the peak power MAP, if the temperature and state of charge of the power battery are in the first area, a third voltage X3 less than or equal to the rated voltage of the single cell is determined according to the 2C~4C rate discharge data of the power battery, and the power MAP value is calculated in the form of the third voltage X3*number of cell strings*system instantaneous current; if the temperature and state of charge of the power battery are in the second area, the power MAP value is calculated in the form of the lower limit voltage of the single cell*number of cell strings*system instantaneous current; if the temperature and state of charge of the power battery are in the third area, a third voltage X3 less than or equal to the rated voltage of the single cell is determined according to the 2C~4C rate discharge data of the power battery. A fourth voltage X4 is between the lower limit voltage of the single-cell and the rated voltage of the single-cell, and the power MAP value is calculated in the manner of fourth voltage X4*number of battery cell strings*system instantaneous current; if the temperature and state of charge of the power battery are in the fourth area, a voltage less than the lower limit voltage of the single-cell is taken as the fifth voltage X5, and the power MAP value is calculated in the manner of fifth voltage X5*number of battery cell strings*system instantaneous current. Therefore, when the power MAP is the peak power MAP, by dividing the power MAP into different areas and adopting different calculation methods to evaluate the peak power MAP, the evaluated peak power MAP can be made closer to the actual peak power MAP.

[0047] In summary, the power MAP generation method for a power battery according to an embodiment of the present invention divides the power battery into regions based on its temperature range and state of charge, and uses different calculation strategies to determine the power MAP values ​​for different regions based on the power battery's single-cell minimum voltage and / or single-cell rated voltage. Thus, by dividing the power battery into different regions and using different calculation strategies to determine the power MAP values ​​for each region, the estimated power MAP can be closer to the actual power MAP, thereby further facilitating the evaluation of vehicle power and economy.

[0048] Figure 3 FIG. 1 is a schematic diagram of a power MAP generating device for a power battery according to an embodiment of the present invention. Figure 3 As shown, the power MAP generating device 100 of the power battery includes: a region division module 110 and a calculation module 120 .

[0049] Among them, the area division module 110 is used to divide the area according to the temperature range and charge state of the power battery; the calculation module 120 is used to determine the power MAP value of the power MAP using different calculation strategies for different areas based on the single-cell lower limit voltage and / or single-cell rated voltage of the power battery.

[0050] In some embodiments, the region division module 110 is specifically used to: determine a temperature division point within a preset temperature range based on the characteristics of the power battery; determine a state of charge division point within a preset state of charge range based on the discharge data of the power battery; and perform region division based on the temperature division point and the state of charge division point.

[0051] In some embodiments, when the power MAP is a continuous power MAP, the discharge data is 1 / 3C to 1C rate discharge data; when the power MAP is a peak power MAP, the discharge data is 2C to 4C rate discharge data.

[0052] In some embodiments, the region division module 110 is specifically used to: if the temperature of the power battery is greater than or equal to the temperature division point and the state of charge of the power battery is greater than or equal to the state of charge division point, it is the first region; if the temperature of the power battery is greater than or equal to the temperature division point and the state of charge of the power battery is less than the state of charge division point, it is the second region; if the temperature of the power battery is less than the temperature division point and the state of charge of the power battery is greater than or equal to the state of charge division point, it is the third region; if the temperature of the power battery is less than the temperature division point and the state of charge of the power battery is less than the state of charge division point, it is the fourth region.

[0053] In some embodiments, when the power MAP is a continuous power MAP, the calculation module 120 is specifically used to: if it is the first region, determine the power MAP value according to the single-cell rated voltage, the number of cell strings of the power battery and the instantaneous current of the system; if it is the second region, determine the power MAP value according to the single-cell lower limit voltage, the number of cell strings and the instantaneous current of the system; if it is the third region, determine the power MAP value according to the first voltage, the number of cell strings and the instantaneous current of the system, and the first voltage is between the single-cell lower limit voltage and the single-cell rated voltage; if it is the fourth region, determine the power MAP value according to the second voltage, the number of cell strings and the instantaneous current of the system, and the second voltage is less than the single-cell lower limit voltage.

[0054] In some embodiments, when the power MAP is the peak power MAP, the calculation module 120 is specifically used to: if it is the first region, determine the power MAP value according to the third voltage, the number of cell strings of the power battery and the instantaneous current of the system, the third voltage is determined according to the 2C~4C rate discharge data of the power battery, and the third voltage is less than or equal to the rated voltage of the single cell; if it is the second region, determine the power MAP value according to the lower limit voltage of the single cell, the number of cell strings and the instantaneous current of the system; if it is the third region, determine the power MAP value according to the fourth voltage, the number of cell strings and the instantaneous current of the system, the fourth voltage is determined according to the 2C~4C rate discharge data of the power battery, and the fourth voltage is between the lower limit voltage of the single cell and the rated voltage of the single cell; if it is the fourth region, determine the power MAP value according to the fifth voltage, the number of cell strings and the instantaneous current of the system, and the fifth voltage is less than the lower limit voltage of the single cell.

[0055] It should be noted that for the description of the power MAP generating device of the power battery in this application, please refer to the description of the power MAP generating method of the power battery in this application, and the details will not be repeated here.

[0056] According to an embodiment of the present invention, a power battery power MAP generation device uses a region division module to divide the power battery into regions based on its temperature range and state of charge. Furthermore, a calculation module uses different calculation strategies to determine the power MAP values ​​for different regions based on the power battery's single-cell minimum voltage and / or single-cell rated voltage. Thus, by dividing the regions and using different calculation strategies to determine the power MAP values ​​for each region, the estimated power MAP can be closer to the actual power MAP, thereby further facilitating the evaluation of vehicle power and economy.

[0057] An embodiment of the present invention further provides a power battery, comprising the power MAP generating device for the power battery described above.

[0058] According to the power battery of an embodiment of the present invention, through the power MAP generating device of the power battery described above, by dividing the power MAP into different areas and adopting different calculation strategies for each of the divided areas to determine the power MAP value, the estimated power MAP can be made closer to the actual power MAP, thereby being more conducive to the evaluation of the power and economy of the whole vehicle.

[0059] An embodiment HIA of the present invention provides a vehicle, comprising the power battery described above.

[0060] According to the vehicle of the embodiment of the present invention, by using the above-mentioned power battery, the power MAP value is determined by dividing the power battery into different areas and adopting different calculation strategies for each of the divided areas. This can make the estimated power MAP closer to the actual power MAP, thereby being more conducive to the evaluation of the power and economy of the entire vehicle.

[0061] It should be noted that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0062] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0063] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0065] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0066] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A method for generating a power MAP of a power battery, characterized in that: The method comprises: Regional division based on the temperature range and state of charge of the power battery; Determine the power MAP value of the power MAP by adopting different calculation strategies for different regions according to the single-cell lower limit voltage and / or the single-cell rated voltage of the power battery; The regional division according to the temperature range and state of charge of the power battery includes: Determining a temperature dividing point within a preset temperature range according to the characteristics of the power battery; Determining a state of charge dividing point within a preset state of charge range based on discharge data of the power battery; Performing regional division according to the temperature division point and the state of charge division point; The performing of region division according to the temperature division point and the state of charge division point includes: If the temperature of the power battery is greater than or equal to the temperature dividing point and the state of charge of the power battery is greater than or equal to the state of charge dividing point, it is the first zone; If the temperature of the power battery is greater than or equal to the temperature dividing point and the state of charge of the power battery is less than the state of charge dividing point, it is the second zone; If the temperature of the power battery is lower than the temperature dividing point and the state of charge of the power battery is greater than or equal to the state of charge dividing point, it is the third zone; If the temperature of the power battery is lower than the temperature dividing point and the state of charge of the power battery is lower than the state of charge dividing point, it is the fourth zone; If it is the first region, the power MAP value is determined according to the single-cell rated voltage, the number of cell strings of the power battery, and the instantaneous current of the system; If it is the second area, the power MAP value is determined according to the single-cell lower limit voltage, the number of cell strings and the system instantaneous current; If it is the third region, the power MAP value is determined according to the first voltage, the number of battery cell strings, and the instantaneous current of the system, and the first voltage is between the single-cell lower limit voltage and the single-cell rated voltage; If it is the fourth region, the power MAP value is determined according to the second voltage, the number of battery cell strings, and the instantaneous current of the system, and the second voltage is less than the single-cell lower limit voltage.

2. The method for generating a power MAP of a power battery according to claim 1, characterized in that: When the power MAP is a continuous power MAP, the discharge data is 1 / 3C to 1C rate discharge data; When the power MAP is a peak power MAP, the discharge data is 2C-4C rate discharge data.

3. The method for generating a power MAP of a power battery according to claim 1, characterized in that: When the power MAP is a peak power MAP, the power MAP value of the power MAP is determined by adopting different calculation strategies for different regions according to the single-cell lower limit voltage and / or single-cell rated voltage of the power battery, including: If it is the first region, the power MAP value is determined according to the third voltage, the number of battery cell strings of the power battery, and the instantaneous current of the system, the third voltage is determined according to the 2C-4C rate discharge data of the power battery, and the third voltage is less than or equal to the rated voltage of the single cell; If it is the second area, the power MAP value is determined according to the single-cell lower limit voltage, the number of cell strings and the system instantaneous current; If it is the third region, the power MAP value is determined according to a fourth voltage, the number of battery cell strings, and the instantaneous system current, the fourth voltage being determined according to 2C-4C rate discharge data of the power battery, and the fourth voltage being between the single-cell lower limit voltage and the single-cell rated voltage; If it is the fourth region, the power MAP value is determined according to the fifth voltage, the number of battery cell strings and the instantaneous current of the system, and the fifth voltage is less than the single-cell lower limit voltage.

4. A power MAP generating device for a power battery, characterized in that: The device comprises: A zone division module is used to divide the power battery into zones according to its temperature range and state of charge; A calculation module for determining a power MAP value of a power MAP using different calculation strategies for different regions according to the single-cell lower limit voltage and / or single-cell rated voltage of the power battery; The region division module is further configured to: determine a temperature division point within a preset temperature range according to the characteristics of the power battery; Determining a state of charge dividing point within a preset state of charge range based on discharge data of the power battery; Performing regional division according to the temperature division point and the state of charge division point; The area division module is further configured to: if the temperature of the power battery is greater than or equal to the temperature division point and the state of charge of the power battery is greater than or equal to the state of charge division point, determine that the area is the first area; If the temperature of the power battery is greater than or equal to the temperature dividing point and the state of charge of the power battery is less than the state of charge dividing point, it is the second zone; If the temperature of the power battery is lower than the temperature dividing point and the state of charge of the power battery is greater than or equal to the state of charge dividing point, it is the third zone; If the temperature of the power battery is lower than the temperature dividing point and the state of charge of the power battery is lower than the state of charge dividing point, it is the fourth zone; The calculation module is further configured to determine the power MAP value according to the single-cell rated voltage, the number of cell strings of the power battery, and the instantaneous current of the system if the area is the first area; If it is the second area, the power MAP value is determined according to the single-cell lower limit voltage, the number of cell strings and the system instantaneous current; If it is the third region, the power MAP value is determined according to the first voltage, the number of battery cell strings, and the instantaneous current of the system, and the first voltage is between the single-cell lower limit voltage and the single-cell rated voltage; If it is the fourth region, the power MAP value is determined according to the second voltage, the number of battery cell strings, and the instantaneous current of the system, and the second voltage is less than the single-cell lower limit voltage.

5. A power battery, characterized in that: A power MAP generating device for a power battery comprising the device as claimed in claim 4.

6. A vehicle, characterized in that: Comprising the power battery as claimed in claim 5.

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