CN112485685A - Power bearing capacity parameter determination method and device and electronic equipment - Google Patents

Power bearing capacity parameter determination method and device and electronic equipment Download PDF

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Publication number
CN112485685A
CN112485685A CN202011383222.8A CN202011383222A CN112485685A CN 112485685 A CN112485685 A CN 112485685A CN 202011383222 A CN202011383222 A CN 202011383222A CN 112485685 A CN112485685 A CN 112485685A
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power
battery
state
discharge
discharge power
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CN202011383222.8A
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CN112485685B (en
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邝忠诚
蒋锋
刘珂
尹大卫
张延鹏
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Haima Motor Corp
Haima New Energy Vehicle Co Ltd
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Haima Motor Corp
Haima New Energy Vehicle Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/385—Arrangements for measuring battery or accumulator variables
    • G01R31/387—Determining ampere-hour charge capacity or SoC

Abstract

The application provides a method and a device for determining power bearing capacity parameters and electronic equipment, and relates to the technical field of new energy automobiles, wherein the SOP of a battery under the current condition can be periodically estimated based on analysis and calculation of battery core temperature, voltage, current, SOC, fault level of a battery system, power request of a whole automobile system and the like, the environment, the battery core capacity, the system requirements and the like are fully considered, and the accuracy of the power estimated by the SOP is improved; considering the differentiation of the cell temperature and the SOC, an estimation mode is provided based on the maximum value and the minimum value of the cell temperature and the maximum value and the minimum value of the SOC, the SOP of the battery in a charging state and a discharging state is estimated, the safety of the battery in different states is guaranteed to the maximum extent, and the over-charging or over-discharging of the cell is prevented.

Description

Power bearing capacity parameter determination method and device and electronic equipment
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a method and a device for determining a power bearing capacity parameter and electronic equipment.
Background
The current environmental and energy problems are increasingly prominent, and new energy automobiles are rapidly developed as strategic industries to deal with energy crises and environmental crises.
The power Battery is a core component of a new energy automobile power System, and the performance of the power Battery is very important for safe and efficient operation of a vehicle, so that a Battery Management System (BMS) is also paid more and more attention. The accurate estimation of the State of power (SOP) can ensure that the hybrid vehicle obtains larger power on the premise of protecting the battery.
The current SOP of the battery is estimated by the conventional SOP estimation method through the open-circuit voltage and the internal resistance corresponding to the State of charge (SOC) under the current condition, but the current changes violently in the driving process, and a large error is generated by using a composite pulse method.
Disclosure of Invention
The invention provides a power bearing capacity parameter determining method, a determining device and an electronic device, which can determine the power bearing capacity parameter according to the environment, cell energy and system requirements and considering cell temperature, maximally ensure the safety of a battery in different states and prevent over-charge or over-discharge of a cell.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides a method for determining a power-tolerant capability parameter, where the method for determining a power-tolerant capability parameter includes:
acquiring temperature information of a power battery, a lowest cell state of charge (SOC) and a residual service life (SOH), wherein the temperature information comprises a highest cell temperature and a lowest cell temperature;
determining the available power of the power battery corresponding to the current condition according to the temperature information, the lowest cell SOC and a preset power bearing capacity topology, wherein the power bearing capacity topology stores the corresponding relation between the highest cell temperature, the lowest cell SOC and the available power of the power battery under the condition;
determining the discharging power of the power battery in the current SOH state according to the available power and the current SOH of the power battery;
performing first limiting processing on the discharge power according to the limited state of the power bearing capacity of the power battery;
performing second limiting treatment on the discharge power after the first limiting treatment according to the fault level of the power battery;
and determining the discharge power after the second limiting treatment as a power bearing capacity parameter of the power battery.
In an alternative embodiment, the available power includes 2s discharge power, 10s discharge power, and 30s discharge power; the step of determining the discharging power of the power battery under the current SOH state according to the available power and the current SOH of the power battery comprises the following steps:
multiplying the 2s discharge power, the 10s discharge power and the 30s discharge power by the current SOH of the power battery respectively to determine the discharge power of the power battery in the current SOH state;
the discharging power of the power battery in the current SOH state comprises 2s discharging power in the current SOH state, 10s discharging power in the current SOH state and 30s discharging power in the current SOH state.
In an alternative embodiment, the step of performing a first limiting process on the discharge power according to the limited state of the power bearing capacity of the power battery comprises:
when the power battery is in a limited state, reducing the numerical values of 2s discharge power in the current SOH state and 10s discharge power in the current SOH state to 30s discharge power in the current SOH state at a preset rate;
and when the power battery is in the non-limited state, the numerical values of 2s discharge power in the current SOH state, 10s discharge power in the current SOH state and 30s discharge power in the current SOH state are not limited.
In an alternative embodiment, the step of performing the second limiting process on the discharge power after the first limiting process according to the fault level of the power battery comprises:
when the fault level is zero-level fault, the discharge power is not limited;
when the fault level is more than zero level and less than or equal to three levels, reducing the discharge power by a preset proportion;
when the fault level is more than three levels, the discharge power is reduced to 0.
In an optional embodiment, before the step of performing the first limitation processing on the discharge power according to the limited state of the power bearing capacity of the power battery, the method further includes:
and determining the limited capacity state of the power battery, determining the power battery to be in a limited state when the cold start marker bit or the peak power limit marker bit of the power battery is a preset marker bit, and otherwise, determining the power battery to be in a non-limited state.
In a second aspect, the present invention provides a power-supporting capability parameter determining apparatus, configured to execute the power-supporting capability parameter determining method according to any one of the foregoing embodiments, the power-supporting capability parameter determining apparatus including:
the acquisition module is used for acquiring temperature information, the lowest cell temperature, the lowest cell state of charge (SOC) and the residual life SOH of the power battery; wherein the temperature information comprises a highest cell temperature and a lowest cell temperature;
the processing module is used for determining the available power of the power battery corresponding to the current condition according to the temperature information, the lowest cell SOC and a preset power bearing capacity topology, wherein the power bearing capacity topology stores the corresponding relation between the highest cell temperature, the lowest cell SOC and the available power of the power battery under the condition;
the processing module is further used for determining the discharging power of the power battery in the current SOH state according to the available power and the current SOH of the power battery;
the processing module is further used for carrying out first limiting processing on the discharging power according to the limited state of the power bearing capacity of the power battery;
the processing module is further used for carrying out second limiting processing on the discharge power subjected to the first limiting processing according to the fault level of the power battery;
and the determining module is used for determining the discharge power after the second limiting processing as a power bearing capacity parameter of the power battery.
In an alternative embodiment, the available power includes 2s discharge power, 10s discharge power, and 30s discharge power;
the processing module is used for multiplying the 2s discharge power, the 10s discharge power and the 30s discharge power with the current SOH of the power battery respectively to determine the discharge power of the power battery in the current SOH state; the discharging power of the power battery in the current SOH state comprises 2s discharging power in the current SOH state, 10s discharging power in the current SOH state and 30s discharging power in the current SOH state.
In an optional embodiment, the processing module is configured to, when the power battery is in the limited state, decrease the values of the 2s discharge power in the current SOH state and the 10s discharge power in the current SOH state to the 30s discharge power in the current SOH state at a preset rate; and when the power battery is in the non-limited state, the numerical values of 2s discharge power in the current SOH state, 10s discharge power in the current SOH state and 30s discharge power in the current SOH state are not limited.
In an optional embodiment, the processing module is configured to, when the fault level is a zero-level fault, not limit the discharge power; when the fault level is more than zero level and less than or equal to three levels, reducing the discharge power by a preset proportion; when the fault level is more than three levels, the discharge power is reduced to 0.
In a third aspect, the present invention provides an electronic device, comprising a processor and a memory, wherein the memory stores computer-readable program instructions, and the computer-readable program instructions, when executed by the processor, implement the steps of the power-handling capability parameter determining method according to any one of the preceding embodiments.
Compared with the prior art, the method, the device and the electronic equipment for determining the power bearing capacity parameter have the following beneficial effects:
the method, the device and the electronic equipment for determining the power bearing capacity parameters can periodically estimate the SOP of the battery under the current condition based on the analysis and calculation of the temperature of the battery core, the SOC, the fault level of the battery system, the power request of the whole vehicle system and the like, fully consider the environment, the capacity of the battery core, the system requirement and the like, and improve the accuracy of the power for estimating the SOP; considering the differentiation of the cell temperature and the SOC, an estimation mode is provided based on the maximum value and the minimum value of the cell temperature and the maximum value and the minimum value of the SOC, the SOP of the battery in a charging state and a discharging state is estimated, the safety of the battery in different states is guaranteed to the maximum extent, and the over-charging or over-discharging of the cell is prevented.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic flow chart of a method for determining a power-supporting capability parameter according to this embodiment;
fig. 2 is a schematic flow chart of another power-handling capability parameter determining method provided in this embodiment;
fig. 3 is a schematic flow chart of another power-supporting capability parameter determining method provided in this embodiment;
fig. 4 is a schematic flow chart of another power-supporting capability parameter determining method provided in this embodiment;
fig. 5 is a schematic functional block diagram of a power-supporting capability parameter determining apparatus provided in this embodiment;
fig. 6 is a schematic diagram of an electronic device provided in this embodiment.
Icon: 200-power-carrying capacity parameter determination means; 210-an obtaining module; 220-a processing module; 230-a determination module; 310-a processor; 311-a memory; 312-a bus; 313 — a communication interface.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
At present, environmental and energy problems are increasingly highlighted, and new energy automobiles are rapidly developed as strategic industries to deal with energy crisis and environmental crisis. Due to the limitations of the characteristics of the power battery itself and the relatively slow acceleration of the charging infrastructure, problems such as battery endurance and charging are temporarily difficult to solve. Compared with the prior art, the plug-in hybrid electric vehicle combines the engine and the power battery together, makes up respective disadvantages, makes full use of the advantages of the engine and the power battery, reduces emission and overcomes the defects of a pure electric vehicle.
The power Battery is a core component of a plug-in hybrid electric vehicle power System, and the performance of the power Battery is very important for safe and efficient operation of the vehicle, so that a Battery Management System (BMS) is also gaining more and more attention. In a management system of a battery, a State of charge (SOC), a remaining life (SOH), and a power-handling capacity (SOP) of the battery are all important parameters for the operation of the battery, wherein accurate estimation of the SOP enables a hybrid vehicle to obtain greater power on the premise of protecting the battery, and the SOP of the battery is nonlinear because the power State of the electric vehicle is inseparable from the SOC, SOH, temperature, fault State, and the like of the battery.
In the prior art, the SOP of a battery is estimated by a composite pulse method, and the current SOP of the battery is estimated by an open-circuit voltage and an internal resistance corresponding to the SOC under the current condition. However, the current changes very sharply during driving, a large error is generated by using the composite pulse method, and the method does not consider the current threshold and the SOC limit of the battery during charging and discharging, so that the estimated power error is large.
In order to solve the above problem, an embodiment of the present application provides a method for determining a power-carrying capacity parameter, which determines the power-carrying capacity parameter according to an environment, a cell energy, and a system requirement, and meanwhile, in consideration of a cell temperature, so as to maximally ensure the safety of a battery in different states and prevent overcharge or overdischarge of a cell.
It should be noted that, when determining the power carrying capacity parameter of the power battery, the different states, such as the logic, operation, model, and the like of the charging state and the discharging state, are substantially consistent, and this application mainly takes the example of preventing the over-discharge of the battery cell as an example, and the principle of preventing the over-charge of the battery is substantially consistent with the principle of preventing the over-discharge of the battery cell, and the detailed description of this embodiment is omitted.
Referring to fig. 1, fig. 1 shows a method for determining a power tolerance parameter provided in the present embodiment, where the method for determining a power tolerance parameter provided in the present embodiment includes the following steps:
step 110: the method comprises the steps of obtaining temperature information of the power battery, the lowest cell state of charge (SOC) and the remaining life (SOH), wherein the temperature information comprises the highest cell temperature and the lowest cell temperature.
Step 120: and determining the available power of the corresponding power battery under the current condition according to the temperature information, the lowest cell SOC and a preset power bearing capacity topology, wherein the power bearing capacity topology stores the corresponding relation between the highest cell temperature, the lowest cell SOC and the available power of the power battery under the condition.
Step 130: and determining the discharge power of the power battery in the current SOH state according to the available power and the current SOH of the power battery.
Step 140: and carrying out first limiting treatment on the discharge power according to the limited state of the power bearing capacity of the power battery.
Step 150: and performing second limiting treatment on the discharge power after the first limiting treatment according to the fault level of the power battery.
Step 160: and determining the discharge power after the second limiting treatment as a power bearing capacity parameter of the power battery.
According to the power bearing capacity parameter determining method, the SOP of the battery under the current condition can be periodically estimated based on the analysis and calculation of the temperature of the battery core, the SOC, the fault level of the battery system, the power request of the whole vehicle system and the like, the environment, the battery core capacity, the system requirement and the like are fully considered, and the accuracy of the power for SOP estimation is improved; considering the differentiation of the cell temperature and the SOC, an estimation mode is provided based on the maximum value and the minimum value of the cell temperature and the maximum value and the minimum value of the SOC, power bearing capacity parameters of the power battery in a charging state and a discharging state can be reasonably estimated, the safety of the battery in different states is guaranteed to the maximum extent, and the cell is prevented from being overcharged or overdischarged.
In some possible implementation manners, the power battery includes a plurality of battery cells, and due to differences in performance, discharge capacity, and the like, state parameters of the plurality of battery cells may be different, where a highest battery cell temperature of the power battery refers to a highest battery cell temperature among all battery cells included in the power battery, and similarly, a lowest battery cell temperature refers to a lowest battery cell temperature among all battery cells included in the power battery, a lowest battery cell SOC refers to a lowest battery cell SOC among all battery cells included in the power battery, and a remaining life SOH refers to a remaining life of the power battery.
After the highest cell temperature, the lowest cell temperature and the lowest cell state of charge (SOC) of the power battery are obtained, the available power of the power battery is determined according to the highest cell temperature, the lowest cell SOC and a preset power bearing capacity topology. The power bearing capacity topology stores the corresponding relation between the highest cell temperature, the lowest cell SOC and the available power; in some possible implementations, the available power includes 2s discharge power, 10s discharge power, and 30s discharge power, and the 2s discharge power, 10s discharge power, and 30s discharge power of the power battery are determined according to a search of the highest cell temperature, the lowest cell temperature, and the lowest cell SOC in the power-bearing topology. Optionally, taking 2s discharge power as an example, the 2s discharge power refers to a discharge capacity of the power battery corresponding to the current condition (the highest cell temperature, the lowest cell temperature, and the lowest cell state of charge SOC).
And after the 2s discharge power, the 10s discharge power and the 30s discharge power of the power battery are determined, determining the discharge power of the power battery in the current SOH state according to the 2s discharge power, the 10s discharge power and the 30s discharge power and the current SOH of the power battery.
In some possible implementations, the discharge power of the power battery in the current SOH state includes a 2s discharge power in the current SOH state, a 10s discharge power in the current SOH state, and a 30s discharge power in the current SOH state.
In one possible implementation, step 130 may be implemented in such a way that: multiplying the 2s discharge power by the current SOH of the power battery to obtain the 2s discharge power of the power battery in the current SOH state; multiplying the 10s discharge power by the current SOH of the power battery to obtain the 10s discharge power of the power battery in the current SOH state; and multiplying the 30s discharge power by the current SOH of the power battery to obtain the 30s discharge power of the power battery in the current SOH state.
And after the discharging power of the power battery is determined, the SOP is limited and corrected according to the limited state of the power bearing capacity of the power battery and the fault level. First, a limited state of the power withstand capability of the power battery needs to be obtained.
In some possible implementations, referring to fig. 2, the method for determining the power-handling capability parameter further includes:
step 131: and determining the limited state of the power bearing capacity of the power battery, determining the power battery to be in the limited state when the flag bit of the power battery which is not allowed to use the peak power or the flag bit of the power battery without the peak power is the preset flag bit, and otherwise, determining the power battery to be in the non-limited state.
In one possible implementation, the battery SOC is compared with an SOC value under a cold start condition determined by looking up a table according to the cell temperature, and the state of the power battery is divided into four intervals: interval D: if the power SOC value is not larger than the SOC obtained by looking up the table and the cold start condition is not satisfied in the interval, marking the position 1 of the cold start mark to show that the cold start is not allowed; and C interval: the SOC value of the battery is not more than 15 and the core temperature is not more than 5 ℃ when the interval D is not met; interval B: when the interval D is not met, the SOC value of the battery is not more than 35 and the temperature of the battery core is not more than-20 ℃; interval A: all the three are A. When the battery state is in the B interval and the C interval, a cold start command is sent before the whole vehicle control, then in the following 80S, the peak power is not allowed to be used, the system does not allow the peak power to be used for marking the position 1, and the power battery is marked not to be allowed to output the peak power.
In another possible implementation manner, the using time of the peak power is calculated in an accumulation manner, when the continuous using time of the peak power is longer than the preset time, the using time of the peak power is over-limited to mark position 1, the peak power is not allowed to be used again in the set time later, and the peak power is not allowed to be used by using the mark position 1 without the peak power.
The current power is compared with the capacity of the battery, so that the battery core works in a reasonable range, and the performance of the battery core is ensured.
When estimating the power bearing capacity parameter of the power battery, determining the limited state of the power bearing capacity of the power battery according to the state of the flag bit, and when the flag bit of the power battery which does not allow to use the peak power or the flag bit of the power battery which does not use the peak power is the preset flag bit, for example, in the embodiment, the preset flag bit is set to 1, determining that the power battery is in the limited state, otherwise, determining that the power battery is in the non-limited state.
In one possible implementation, after determining the limited power-bearing capacity state of the power battery, referring to fig. 3, step 140 includes the following steps according to the limited power-bearing capacity state of the power battery:
step 140-1: and when the power battery is in the limited state, reducing the values of the 2s discharge power in the current SOH state and the 10s discharge power in the current SOH state to 30s discharge power in the current SOH state at a preset rate.
In the drawings and the following description, 2s discharge power in the current SOH state is abbreviated as 2s discharge power, 10s discharge power in the current SOH state is abbreviated as 10s discharge power, and 30s discharge power in the current SOH state is abbreviated as 30s discharge power.
In one possible implementation, the battery management system outputs the available power of the power battery to the CAN bus, and the battery management system of the vehicle outputs corresponding power in response to the system demand.
If the power bearing capacity of the power battery is in a limited state, if the conventional 2s discharge power and 10s discharge power are still output, the reliability and safety of the power battery may be affected, and in this case, the values of the 2s discharge power and the 10s discharge power are reduced to 30s discharge power at a preset rate, that is, the discharge power of the power battery is reduced, so that the power battery is prevented from being damaged.
In one possible implementation, the values of the 2s discharge power and the 10s discharge power may be reduced to 30s discharge power at a rate of 100 Kw/s.
Step 140-2: when the power battery is in the non-limiting state, the values of the 2s discharge power in the current SOH state, the 10s discharge power in the current SOH state and the 30s discharge power in the current SOH state are not limited.
If the power bearing capacity of the power battery is not limited, the values of the 2s discharge power in the current SOH state, the 10s discharge power in the current SOH state and the 30s discharge power in the current SOH state are not limited, and the discharge power determined in the step 130 is output to the CAN bus.
In some possible implementations, the power battery may also have different levels of system failures, when the power battery fails, the discharging capability of the power battery is affected, and in order to make worse the influence on the power battery, referring to fig. 4, the step of performing the second limitation on the available power after the first limitation according to the failure level of the power battery includes:
step 150-1: when the fault level is a zero-level fault, the discharge power is not limited.
If the power battery is not in fault, the discharge power is not limited, and the discharge power at this time is the discharge power processed by the first limitation processing in step 140.
Step 150-2: and when the fault level is more than zero level and less than or equal to three levels, reducing the discharge power by a preset proportion.
And when the fault level of the power battery is greater than zero level and less than or equal to three levels, further reducing the discharge power after the first limiting treatment.
For example, when the power battery has a primary fault, the discharge power is reduced by 10%, when the power battery has a secondary fault, the discharge power of the power battery is reduced by 30%, and when the power battery has a tertiary fault, the discharge power of the power battery is reduced by 80%, wherein the higher the fault level is, the more severe the representation is.
Step 150-3: when the fault level is more than three, the discharge power is reduced to 0.
If the fault level is greater than three levels, the condition of representing the power battery is severe, the safety and the reliability of the power battery cannot be guaranteed, and under the condition, the discharge power is reduced to 0, so that potential safety hazards caused by continuous work of the power battery are avoided.
It should be noted that the zero-level, first-level, second-level, and third-level faults are only exemplary descriptions of the present embodiment, and are not limiting to the present embodiment, and in an actual application process, the available power may be subjected to the second limiting process according to the fault types or levels of different power batteries, which is not limited in the present embodiment.
After the first limiting processing and the second limiting processing are performed on the discharging power, understandably, the available power of the power battery is correspondingly corrected according to the limited state of the power bearing capacity of the power battery and the fault state of the power battery, the processed available power is determined as the power bearing capacity parameter of the power battery and is output to the CAN bus, the safety of the battery in different states is guaranteed to the maximum extent, and the overcharge or the overdischarge of the battery core is prevented.
It should be noted that the power estimation includes charging and discharging, the calculation logic of both is constant, and the above embodiment describes the determination of the power-withstanding capability parameter provided by the present application in a discharging state, and for the sake of brief description, the detailed description of the determination of the power-withstanding capability parameter in a charging state is omitted, and both are basically the same.
In order to execute the corresponding steps in the above embodiments and various possible implementations, an implementation of a power tolerance parameter determining apparatus is given below, please refer to fig. 5, and fig. 5 is a power tolerance parameter determining apparatus 200 according to a preferred embodiment of the present invention. It should be noted that the basic principle and the generated technical effect of the power-endurance parameter determining apparatus 200 provided in the present embodiment are substantially the same as those of the air-conditioning control method provided in the foregoing embodiment, and for the sake of brief description, for parts not mentioned in the present embodiment, reference may be made to the corresponding contents in the foregoing embodiment. The apparatus 200 for determining power tolerance parameters provided in this embodiment includes an obtaining module 210, a processing module 220, and a determining module 230.
The obtaining module 210 is configured to obtain temperature information of the power battery, a lowest cell state of charge SOC, and a remaining life SOH, where the temperature information includes a highest cell temperature and a lowest cell temperature.
It is to be understood that, in one possible implementation manner, the obtaining module 210 may be configured to perform the step 110 in the above-mentioned figures to achieve the corresponding technical effect.
And the processing module 220 is configured to determine the available power of the power battery corresponding to the current condition according to the temperature information, the lowest cell SOC, and a preset power bearing capability topology, where the power bearing capability topology stores a corresponding relationship between the highest cell temperature, the lowest cell SOC, and the available power of the power battery under the condition.
It will be appreciated that in one possible implementation, the processing module 220 may be configured to perform the step 120 in the above-described figures to achieve the corresponding technical effect.
The processing module 220 is further configured to determine a discharging power of the power battery in a current SOH state according to the available power and the current SOH of the power battery.
It will be appreciated that in one possible implementation, the processing module 220 may be configured to perform the step 130 in the above-described figures to achieve the corresponding technical effect.
The processing module 220 is further configured to determine a limited state of the power capability of the power battery, determine that the power battery is in the limited state when the flag bit of the power battery that does not allow to use the peak power or the flag bit of the power battery that does not allow to use the peak power is the preset flag bit, and determine that the power battery is in the non-limited state otherwise.
It will be appreciated that in one possible implementation, the processing module 220 may be configured to perform the step 131 in the above-mentioned figures to achieve the corresponding technical effect.
The processing module 220 is further configured to perform a first limiting process on the discharge power according to the limited state of the power bearing capacity of the power battery.
It will be appreciated that in one possible implementation, the processing module 220 may be configured to perform the step 140 in the above-described figures to achieve the corresponding technical effect.
In some possible implementations, the processing module 220 is specifically configured to multiply the 2s discharge power, the 10s discharge power, and the 30s discharge power with the current SOH of the power battery to determine the discharge power; the discharging power comprises 2s discharging power in the current SOH state, 10s discharging power in the current SOH state and 30s discharging power in the current SOH state.
In some possible implementations, the processing module 220 is specifically configured to, when the power battery is in the limited state, decrease the values of the 2s discharge power in the current SOH state and the 10s discharge power in the current SOH state to the 30s discharge power in the current SOH state at a preset rate; when the power battery is in the non-limiting state, the values of the 2s discharge power in the current SOH state, the 10s discharge power in the current SOH state and the 30s discharge power in the current SOH state are not limited.
It is understood that in one possible implementation, the processing module 220 may be configured to perform steps 140-1 to 140-2 in the above-mentioned figures to achieve the corresponding technical effect.
The processing module 220 is further configured to perform a second limiting process on the discharge power after the first limiting process according to the fault level of the power battery.
It will be appreciated that in one possible implementation, the processing module 220 may be configured to perform the step 150 in the above-described figures to achieve a corresponding technical effect.
In some possible implementations, the processing module 220 is configured to not limit the discharge power when the fault level is a zero-level fault; when the fault level is greater than zero level and less than or equal to three levels, reducing the discharge power by a preset proportion; when the fault level is more than three, the discharge power is reduced to 0.
It will be appreciated that in one possible implementation, the processing module 220 may be configured to perform steps 150-1 through 150-3 of the above-described figures to achieve a corresponding technical effect.
And a determining module 230, configured to determine the discharge power after the second limiting process as a power-bearing capability parameter of the power battery.
It will be appreciated that in one possible implementation, the determining module 230 may be configured to perform the step 160 in the above-described figures to achieve the corresponding technical effect.
Referring to fig. 6, an electronic device according to an embodiment of the present application is provided, and fig. 6 illustrates a schematic structural diagram of the electronic device provided in this embodiment. The electronic device includes a processor 310, a memory 311, and a bus 312. The processor 310 and the memory 311 are connected by a bus 312, and the processor 310 is configured to execute an executable module, such as a computer program, stored in the memory 311.
The processor 310 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the power-endurance parameter determination method provided by this embodiment may be implemented by an integrated logic circuit of hardware in the processor 310 or instructions in the form of software. The Processor 310 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
The Memory 311 may include a high-speed Random Access Memory (RAM) and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory.
The bus 312 may be an ISA (Industry Standard architecture) bus, a PCI (peripheral Component interconnect) bus, or an EISA (extended Industry Standard architecture) bus. Only one bi-directional arrow is shown in fig. 6, but this does not indicate only one bus 312 or one type of bus 312.
The memory 311 is used for storing programs, such as programs corresponding to the power endurance parameter determining apparatus. The power-supporting capability parameter determining means includes at least one software functional module which can be stored in the memory 311 in the form of software or firmware (firmware) or is fixed in an Operating System (OS) of the electronic device. The processor 310, upon receiving the execution instruction, executes the program to implement the steps of the power-handling capability parameter determination method.
Possibly, the electronic device provided by the embodiment of the present application further includes a communication interface 313. The communication interface 313 is connected to the processor 310 via a bus. The communication interface 313 may be used to connect external devices, such as a user's cell phone or other terminals, etc.
It should be understood that the structure shown in fig. 6 is merely a structural schematic diagram of a portion of an electronic device, which may also include more or fewer components than shown in fig. 6, or have a different configuration than shown in fig. 6. The components shown in fig. 6 may be implemented in hardware, software, or a combination thereof.
The embodiment of the present application further provides a storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the power-tolerance parameter determining method according to any one of the foregoing embodiments.
In summary, the method, the apparatus, and the electronic device for determining the power carrying capacity parameter provided in this embodiment can periodically estimate the SOP of the battery under the current condition based on analysis and calculation of the battery core temperature, the voltage, the current, the SOC, the fault level of the battery system, the power request of the entire vehicle system, and the like, fully consider the environment, the battery core capacity, the system requirements, and the like, and improve the accuracy of the power for SOP estimation; considering the differentiation of the cell temperature and the SOC, an estimation mode is provided based on the maximum value and the minimum value of the cell temperature and the maximum value and the minimum value of the SOC, the safety of the battery in different states is guaranteed to the maximum extent, and the cell is prevented from being overcharged or overdischarged.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A method for determining a power-handling capability parameter, the method comprising:
acquiring temperature information of a power battery, a lowest cell state of charge (SOC) and a residual service life (SOH), wherein the temperature information comprises a highest cell temperature and a lowest cell temperature;
determining the available power of the power battery corresponding to the current condition according to the temperature information, the lowest cell SOC and a preset power bearing capacity topology, wherein the power bearing capacity topology stores the corresponding relation between the highest cell temperature, the lowest cell SOC and the available power of the power battery under the condition;
determining the discharging power of the power battery in the current SOH state according to the available power and the current SOH of the power battery;
performing first limiting processing on the discharge power according to the limited state of the power bearing capacity of the power battery;
performing second limiting treatment on the discharge power after the first limiting treatment according to the fault level of the power battery;
and determining the discharge power after the second limiting treatment as a power bearing capacity parameter of the power battery.
2. The method according to claim 1, wherein the available power includes 2s discharge power, 10s discharge power, and 30s discharge power; the step of determining the discharging power of the power battery under the current SOH state according to the available power and the current SOH of the power battery comprises the following steps:
multiplying the 2s discharge power, the 10s discharge power and the 30s discharge power by the current SOH of the power battery respectively to determine the discharge power of the power battery in the current SOH state;
the discharging power of the power battery in the current SOH state comprises 2s discharging power in the current SOH state, 10s discharging power in the current SOH state and 30s discharging power in the current SOH state.
3. The power-bearing capacity parameter determination method according to claim 2, wherein the step of performing a first limiting process on the discharge power according to the limited state of the power-bearing capacity of the power battery comprises:
when the power battery is in a limited state, reducing the numerical values of 2s discharge power in the current SOH state and 10s discharge power in the current SOH state to 30s discharge power in the current SOH state at a preset rate;
and when the power battery is in the non-limited state, the numerical values of 2s discharge power in the current SOH state, 10s discharge power in the current SOH state and 30s discharge power in the current SOH state are not limited.
4. The method for determining the power-supporting capability parameter as claimed in claim 1, wherein the step of performing the second limiting process on the discharge power after the first limiting process according to the fault level of the power battery comprises:
when the fault level is zero-level fault, the discharge power is not limited;
when the fault level is more than zero level and less than or equal to three levels, reducing the discharge power by a preset proportion;
when the fault level is more than three levels, the discharge power is reduced to 0.
5. The power-handling capability parameter determining method according to claim 1, wherein before the step of performing the first limiting process on the discharge power according to the limited state of the power-handling capability of the power battery, the method further comprises:
and determining the limited capacity state of the power battery, determining the power battery to be in a limited state when the cold start marker bit or the peak power limit marker bit of the power battery is a preset marker bit, and otherwise, determining the power battery to be in a non-limited state.
6. A power capability parameter determining device, wherein the power capability parameter determining device is configured to perform the power capability parameter determining method according to any one of claims 1 to 5, and the power capability parameter determining device comprises:
the acquisition module is used for acquiring temperature information, the lowest cell temperature, the lowest cell state of charge (SOC) and the residual life SOH of the power battery; wherein the temperature information comprises a highest cell temperature and a lowest cell temperature;
the processing module is used for determining the available power of the power battery corresponding to the current condition according to the temperature information, the lowest cell SOC and a preset power bearing capacity topology, wherein the power bearing capacity topology stores the corresponding relation between the highest cell temperature, the lowest cell SOC and the available power of the power battery under the condition;
the processing module is further used for determining the discharging power of the power battery in the current SOH state according to the available power and the current SOH of the power battery;
the processing module is further used for carrying out first limiting processing on the discharging power according to the limited state of the power bearing capacity of the power battery;
the processing module is further used for carrying out second limiting processing on the discharge power subjected to the first limiting processing according to the fault level of the power battery;
and the determining module is used for determining the discharge power after the second limiting processing as a power bearing capacity parameter of the power battery.
7. The apparatus according to claim 6, wherein the available power comprises 2s discharge power, 10s discharge power and 30s discharge power;
the processing module is used for multiplying the 2s discharge power, the 10s discharge power and the 30s discharge power with the current SOH of the power battery respectively to determine the discharge power of the power battery in the current SOH state; the discharging power of the power battery in the current SOH state comprises 2s discharging power in the current SOH state, 10s discharging power in the current SOH state and 30s discharging power in the current SOH state.
8. The apparatus according to claim 7, wherein the processing module is configured to reduce the values of the 2s discharge power in the current SOH state and the 10s discharge power in the current SOH state to the 30s discharge power in the current SOH state at a preset rate when the power battery is in the limited state; and when the power battery is in the non-limited state, the numerical values of 2s discharge power in the current SOH state, 10s discharge power in the current SOH state and 30s discharge power in the current SOH state are not limited.
9. The apparatus according to claim 6, wherein the processing module is configured to not limit the discharging power when the fault level is a zero-level fault; when the fault level is more than zero level and less than or equal to three levels, reducing the discharge power by a preset proportion; when the fault level is more than three levels, the discharge power is reduced to 0.
10. An electronic device, comprising a processor and a memory, wherein the memory stores computer-readable program instructions, which when executed by the processor, implement the steps of the power-handling capability parameter determination method according to any one of claims 1 to 5.
CN202011383222.8A 2020-11-30 Power bearing capacity parameter determining method and device and electronic equipment Active CN112485685B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113836714A (en) * 2021-09-22 2021-12-24 重庆云宸新能源科技有限公司 Multi-constraint battery available power estimation system and method based on battery state
CN114030357A (en) * 2021-07-14 2022-02-11 山西赛坦科技有限公司 Control device and control method for preventing BMS (battery management system) recharging overcurrent
CN114614118A (en) * 2022-03-09 2022-06-10 东莞新能安科技有限公司 Battery power processing method and device and battery management system
CN116097495A (en) * 2021-09-08 2023-05-09 宁德时代新能源科技股份有限公司 Method for charging power battery and battery management system
WO2023143279A1 (en) * 2022-01-28 2023-08-03 长城汽车股份有限公司 Method for determining soc available window value of battery, and related apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104537268A (en) * 2015-01-19 2015-04-22 重庆长安汽车股份有限公司 Estimation method and device for maximum discharge power of battery
US20150321572A1 (en) * 2014-05-12 2015-11-12 GM Global Technology Operations LLC Systems and methods for determining battery system power capability
CN107436412A (en) * 2017-07-31 2017-12-05 成都雅骏新能源汽车科技股份有限公司 One kind is based on self study estimation electrokinetic cell power method
CN110031766A (en) * 2019-04-28 2019-07-19 广州小鹏汽车科技有限公司 Battery nominal power evaluation method and module, power of battery management method and system, automobile and computer readable storage medium
CN110133512A (en) * 2019-03-06 2019-08-16 北京车和家信息技术有限公司 The power of battery determines method and device thereof
CN110224461A (en) * 2019-06-14 2019-09-10 桑顿新能源科技(长沙)有限公司 Battery power limit method, apparatus, computer equipment and storage medium
CN110293879A (en) * 2019-06-06 2019-10-01 浙江飞碟汽车制造有限公司 A kind of battery system SOP dynamic adjusting method
CN111123124A (en) * 2019-12-31 2020-05-08 中航锂电（洛阳）有限公司 Method and device for determining power state of battery system
CN111257773A (en) * 2019-11-05 2020-06-09 浙江零跑科技有限公司 Battery SOP online estimation method based on pool algorithm

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150321572A1 (en) * 2014-05-12 2015-11-12 GM Global Technology Operations LLC Systems and methods for determining battery system power capability
CN104537268A (en) * 2015-01-19 2015-04-22 重庆长安汽车股份有限公司 Estimation method and device for maximum discharge power of battery
CN107436412A (en) * 2017-07-31 2017-12-05 成都雅骏新能源汽车科技股份有限公司 One kind is based on self study estimation electrokinetic cell power method
CN110133512A (en) * 2019-03-06 2019-08-16 北京车和家信息技术有限公司 The power of battery determines method and device thereof
CN110031766A (en) * 2019-04-28 2019-07-19 广州小鹏汽车科技有限公司 Battery nominal power evaluation method and module, power of battery management method and system, automobile and computer readable storage medium
CN110293879A (en) * 2019-06-06 2019-10-01 浙江飞碟汽车制造有限公司 A kind of battery system SOP dynamic adjusting method
CN110224461A (en) * 2019-06-14 2019-09-10 桑顿新能源科技(长沙)有限公司 Battery power limit method, apparatus, computer equipment and storage medium
CN111257773A (en) * 2019-11-05 2020-06-09 浙江零跑科技有限公司 Battery SOP online estimation method based on pool algorithm
CN111123124A (en) * 2019-12-31 2020-05-08 中航锂电（洛阳）有限公司 Method and device for determining power state of battery system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114030357A (en) * 2021-07-14 2022-02-11 山西赛坦科技有限公司 Control device and control method for preventing BMS (battery management system) recharging overcurrent
CN116097495A (en) * 2021-09-08 2023-05-09 宁德时代新能源科技股份有限公司 Method for charging power battery and battery management system
CN116097495B (en) * 2021-09-08 2024-02-20 宁德时代新能源科技股份有限公司 Method for charging power battery and battery management system
CN113836714A (en) * 2021-09-22 2021-12-24 重庆云宸新能源科技有限公司 Multi-constraint battery available power estimation system and method based on battery state
WO2023143279A1 (en) * 2022-01-28 2023-08-03 长城汽车股份有限公司 Method for determining soc available window value of battery, and related apparatus
CN114614118A (en) * 2022-03-09 2022-06-10 东莞新能安科技有限公司 Battery power processing method and device and battery management system
WO2023169311A1 (en) * 2022-03-09 2023-09-14 东莞新能安科技有限公司 Battery power processing method and apparatus, battery management system, and battery
CN114614118B (en) * 2022-03-09 2024-02-27 东莞新能安科技有限公司 Battery power processing method, device and battery management system

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