CN114062953B - Method and device for determining health state of storage battery and working machine - Google Patents
Method and device for determining health state of storage battery and working machine Download PDFInfo
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- 230000036541 health Effects 0.000 title claims abstract description 125
- 238000000034 method Methods 0.000 title claims abstract description 105
- 230000001502 supplementing effect Effects 0.000 claims abstract description 55
- 230000008569 process Effects 0.000 claims abstract description 46
- 230000005611 electricity Effects 0.000 claims abstract description 35
- 239000013589 supplement Substances 0.000 claims description 15
- 238000007726 management method Methods 0.000 claims description 14
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000002618 waking effect Effects 0.000 claims description 5
- 230000006870 function Effects 0.000 description 11
- 238000004590 computer program Methods 0.000 description 8
- 230000003862 health status Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 230000003020 moisturizing effect Effects 0.000 description 5
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- 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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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Abstract
The invention provides a method, a device and an operation machine for determining the state of health of a storage battery, wherein the method is to acquire energy data in the process of supplementing electricity to the storage battery; based on the association relation between the preset energy data and the health state of the storage battery, the real-time health state of the storage battery is determined according to the energy data, so that the determination of the health state of the storage battery can be completed according to the energy data in the power supplementing process of the storage battery, and the determination mode is simple and convenient.
Description
Technical Field
The present invention relates to the field of battery management technologies, and in particular, to a method and an apparatus for determining a health status of a battery, and a working machine.
Background
With the development of technology, various functions of a vehicle are more and more abundant, various intelligent diagnosis, networking, 24-hour monitoring and other functions are realized, the storage battery of the vehicle is required to supply power and control, the functions bring convenience, meanwhile, the power consumption is also increased sharply, particularly, after the vehicle is motorized, the newly added functions and the consumed power are increased sharply at the same time, under certain conditions, even if the whole vehicle is in a dormant state, a large number of controllers consume limited power, the current storage battery cannot be increased infinitely, and under the conditions, the storage battery is supplied with power, so that the problem of urgent need for solving is solved by avoiding the power shortage. For the electric vehicle, the battery is charged by using the high voltage of the whole vehicle, so that the problem that the whole vehicle cannot be started due to the power shortage of the battery can be well avoided. The current main scheme is to detect whether the storage battery is deficient or not by monitoring the voltage of the storage battery, if the storage battery is found to need to be charged, the whole vehicle is awakened, and the storage battery is charged in a high-voltage mode on the whole vehicle.
However, the current power supply method only can achieve the function of power supply, so how to complete the acquisition of the health state of the storage battery based on the power supply process becomes a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a method and a device for determining the state of health of a storage battery and an operation machine, which are used for solving the defect that the determination of the state of health of the storage battery is complex in the prior art and realizing the rapid and convenient completion of the determination of the state of health of the storage battery in the process of supplementing electricity to the battery.
The invention provides a method for determining the health state of a storage battery, which comprises the following steps:
acquiring energy data in the battery power supplementing process;
and determining the real-time health state of the storage battery according to the energy data based on the preset association relation between the energy data and the health state of the storage battery.
According to the method for determining the state of health of the storage battery, the energy data comprise chargeable energy and supplementary energy;
correspondingly, the obtaining the energy data in the battery recharging process comprises the following steps:
acquiring initial voltage of the storage battery corresponding to the time when the storage battery starts to be charged;
determining chargeable energy of the storage battery according to the initial voltage of the storage battery based on the association relation between the voltage and the chargeable energy;
and determining the corresponding electricity supplementing energy when the electricity supplementing of the storage battery is completed according to the power supply parameters of the power battery and the conversion efficiency of the voltage converter.
According to the method for determining the state of health of the storage battery provided by the invention, before the initial voltage of the storage battery corresponding to the time when the storage battery starts to be charged is obtained, the method further comprises the following steps:
acquiring a charging curve of a factory state of the storage battery;
and establishing the association relation between the voltage and chargeable energy when the storage battery is charged according to the charging curve of the factory state of the storage battery.
According to the method for determining the state of health of the storage battery provided by the invention, the method for acquiring the charging curve of the factory state of the storage battery comprises the following steps:
acquiring a charging curve of a factory state of the storage battery through a storage battery manufacturer; and/or;
and calibrating a working curve of the battery in a factory state when the battery is charged, so as to obtain a charging curve of the battery in the factory state.
According to the method for determining the state of health of the storage battery provided by the invention, before the energy data in the power supplementing process of the storage battery is obtained, the method further comprises the following steps:
acquiring the current health state of the storage battery;
if the value corresponding to the current health state of the storage battery is larger than a preset health state threshold value, determining the current power supply voltage of the storage battery;
if the current power supply voltage is smaller than a preset power supply voltage threshold value, determining a current state of charge value of the power battery;
and if the current state of charge value is greater than a preset state of charge threshold value, controlling the power battery to supplement electricity for the storage battery.
According to the method for determining the state of health of the storage battery provided by the invention, the energy data in the process of supplementing electricity to the storage battery is obtained, and the method comprises the following steps:
and acquiring energy data in the battery power supplementing process through a power management system and/or a vehicle-mounted remote information processor.
According to the method for determining the state of health of the storage battery provided by the invention, before the energy data in the process of supplementing electricity to the storage battery is obtained through the power management system and/or the vehicle-mounted remote information processor, the method further comprises the following steps:
the power management system and/or the vehicle telematics processor is awakened based on a preset timed wake-up function.
According to the method for determining the state of health of the storage battery provided by the invention, before the power battery is controlled to supplement electricity for the storage battery, the method further comprises the following steps:
the whole vehicle controller controls the whole vehicle to finish self-checking, high-voltage loading and voltage converter enabling;
and after the self-checking, the upper high voltage and the voltage converter are enabled, controlling the power battery to supplement electricity for the storage battery.
The invention also provides a device for determining the health state of the storage battery, which comprises the following steps:
the acquisition module is used for acquiring energy data in the battery power supplementing process;
and the determining module is used for determining the real-time health state of the storage battery according to the energy data based on the association relation between the preset energy data and the health state of the storage battery.
The invention also provides a working machine, which adopts the method for determining the health state of the storage battery according to any one of the above methods for determining the health state of the vehicle-mounted storage battery.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method for determining the state of health of the storage battery as described above when executing the program.
The present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of a method of determining the state of health of a battery as described in any of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor carries out the steps of a method of determining the state of health of a battery as described in any of the above.
The invention provides a method, a device and an operation machine for determining the state of health of a storage battery, wherein the method is to acquire energy data in the process of supplementing electricity to the storage battery; based on the association relation between the preset energy data and the health state of the storage battery, the real-time health state of the storage battery is determined according to the energy data, so that the determination of the health state of the storage battery can be completed according to the energy data in the power supplementing process of the storage battery, and the determination mode is simple and convenient.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for determining a state of health of a storage battery according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the battery state of health determination method of FIG. 1;
FIG. 3 is a second flow chart of a method for determining a state of health of a battery according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a device for determining a state of health of a storage battery according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A method and apparatus for determining a state of health of a battery and a working machine according to the present invention will be described with reference to fig. 1 to 4.
Fig. 1 is a schematic flow chart of a method for determining a state of health of a battery according to an embodiment of the present invention, and fig. 2 is a schematic diagram of the method for determining a state of health of a battery in fig. 1.
As shown in fig. 1, the method for determining the health state of the storage battery provided by the embodiment of the invention comprises the following steps:
101. and acquiring energy data in the battery supplementing process.
Specifically, the energy data in the battery recharging process is obtained through a power management system (Battery Management System, BMS) and/or a vehicle-mounted Telematics BOX (T-BOX), and in this embodiment, the energy data in the battery recharging process is obtained by a BMS-optimized manner, which is also described below by taking BMS as an example. The recharging process includes any time from the moment when charging is just started to the moment when charging is completed, wherein the energy data comprises chargeable energy and recharging energy, the chargeable energy E1 refers to the maximum energy which can be received by the storage battery when the storage battery is determined to need to be recharged, and the recharging energy E refers to the energy in the storage battery when the storage battery is completed to be charged, namely, the storage battery reaches a full-power state. Of course, in the present embodiment, the energy when the supplementary energy is full is taken as an example, and the principle is the same at any other time when the charging is in progress, and a specific description will not be given.
102. Based on the association relation between the preset energy data and the health state of the storage battery, determining the real-time health state of the storage battery according to the energy data.
After the energy data of the storage battery is obtained, the energy data can be charged and the energy can be supplemented, the energy data is input into a preset association relationship between the energy data and the health state, and the real-time health state of the storage battery is determined. The specific association relation between the preset energy data and the health state is that the real-time health state of the storage battery is determined according to the ratio of the energy of the electricity supplement and the chargeable energy, and the real-time health state refers to the health state of the storage battery after the current charging is completed. After the state of health of the storage battery is determined and converted, the state of health of the storage battery can be stored in the battery management system, so that the state of health of the storage battery in different time periods can be obtained in real time through the battery management system.
As shown in fig. 2, to complete the recharging of the storage battery, the main components may include: 1. the power battery is a high-voltage power source of the system; 2. the battery end high-voltage box is a main switch for outputting the electric power of the battery end; 3. the whole vehicle end high-voltage box is a whole vehicle end battery input main switch; 4. BMS, battery management system, this system has self-wake-up function, namely can set up certain time interval wake-up work; 5. the DCDC converter can convert direct-current high-voltage power into direct-current low-voltage power; 6. the 24V power supply is a power supply of a low-voltage component of the whole system; 7. the whole vehicle controller receives BMS signals and sends various control commands; 8. the other controllers are all kinds of controllers forming the whole vehicle. In this system, 3 conductive links can be clearly seen: high voltage conduction as shown in solid lines in fig. 2, low voltage conduction as shown in fig. 2 as a line consisting of dots, and control conduction as shown in dashed lines in fig. 2. The 24V battery realizes the electricity supplementing through the power battery, the battery end high-voltage box, the whole vehicle end high-voltage box and the DCDC high-voltage path, the BMS is mainly responsible for waking up at regular time, waking up the whole vehicle controller, carrying out voltage monitoring, controlling the battery end high-voltage box, carrying out electric quantity calculation, the whole vehicle controller mainly realizes the whole vehicle end high-voltage box control and the DCDC enabling, the 24V battery receives the DCDC supplied energy to carry out the electricity supplementing under the dormancy waking state, and in the secondary process, the power supply is needed to be carried out to partial low-voltage accessories at the same time, thereby realizing the completion of the determination of the health state of the storage battery in the electricity supplementing process.
According to the method for determining the state of health of the storage battery, energy data in the process of supplementing electricity to the storage battery is obtained; based on the association relation between the preset energy data and the health state of the storage battery, the real-time health state of the storage battery is determined according to the energy data, so that the determination of the health state of the storage battery can be completed according to the energy data in the power supplementing process of the storage battery, and the determination mode is simple and convenient.
Further, based on the foregoing embodiment, in this embodiment, energy data in a battery recharging process is obtained, and the determining the chargeable energy E1 may specifically be to obtain the initial voltage U of the battery corresponding to the time when the battery begins to recharge; based on the association between the voltage and the chargeable energy, the chargeable energy E1 of the storage battery is determined according to the initial voltage U of the storage battery. The association relationship between the voltage and the chargeable energy may be that a charging curve of the battery in a factory state is obtained before the initial voltage of the battery corresponding to the time when the battery starts to be charged is obtained; for example, a charging curve of the battery in a factory state can be obtained through a battery manufacturer side; and/or; and calibrating a working curve of the battery in a factory state when the battery is charged, so as to obtain a charging curve of the battery in the factory state. And then, according to a charging curve of the factory state of the storage battery, establishing an association relation between the voltage and chargeable energy when the storage battery is charged, and storing the association relation in the BMS so as to rapidly determine the chargeable energy E1 according to the voltage through the BMS.
The determining the supplementary energy E may specifically be determining, according to a power supply parameter of the power battery and a conversion efficiency of the voltage converter, the supplementary energy E corresponding to the completion of the power supply of the storage battery, where the power supply parameter of the power battery includes a power supply voltage and a power supply current. That is, the battery is charged, at this time, the BMS needs to accumulate the output power of the power battery terminal, and continuously accumulate the power consumed at each moment, and the process is continuously performed until the battery is charged to a full charge state, and the process is ended. When the power is supplemented, the BMS calculates the electric quantity consumed by the power supplement by using the voltage and current sensors of the power battery, and combines the initial voltage, the end voltage and the electric quantity supplementing quantity of the storage battery to estimate the capacity of the storage battery, and converts the capacity into the health state of the storage battery. The supplementary energy E of the specific storage battery can be calculated according to the formula (1):
wherein Pack refers to a power battery, and the voltage U of the power battery pack And current I pack The output is the total power of the power battery, eta DCDC The DC-DC converter is used for converting direct-current high voltage into direct-current low voltage, the conversion efficiency is constant, pc is the power loss of the storage battery to each controller, and the value is an experimental constant under the condition of waking up and supplementing electricity.
Fig. 3 is a second flowchart of a method for determining a state of health of a battery according to an embodiment of the present invention.
As shown in fig. 3, the method for determining the state of health of the storage battery in this embodiment includes the steps of:
301. the current state of health of the battery is obtained.
For example, the current state of health value of the battery is obtained through the BMS, the BMS has the function of timing automatic awakening, the offline equalization can be executed, the voltage and the temperature of each electric core in the high-voltage battery can be monitored, and meanwhile, the BMS can be utilized to obtain the power supply voltage of the battery for the BMS end and the electric quantity of the battery can be controlled electrically. The difference between the current health state value and the real-time health state is the health state corresponding to the last moment when the current health state is the real-time health state.
The BMS has a self-awakening function, namely a preset timing awakening function, namely, for example, the BMS is awakened once every 30 seconds, so that the BMS is not required to be in a working state all the time, certain energy consumption can be reduced, the BMS can be awakened by referring to an inherent timing awakening strategy of the BMS, the awakening time is not required to be set independently for the power supplementing process, the health state (initial value is 100%) of the storage battery stored in the BMS is acquired after the awakening, if the health state of the storage battery is lower than a preset health state threshold (the threshold is provided by a storage battery provider and is used as a standard for replacing the storage battery), the health state of the storage battery is proved to be too low, a storage battery replacement reminding mark is sent at the moment, the power supplementing operation is not required, and the process is ended.
302. And if the value corresponding to the current state of health of the storage battery is larger than the preset state of health threshold value, determining the current power supply voltage of the storage battery.
If the obtained current state of health value of the storage battery is larger than the preset state of health threshold, the state of health of the storage battery is good, and the storage battery can be used normally, then the power supply voltage of the storage battery to the BMS is determined, and if the power supply voltage is larger than the preset power supply voltage threshold (the threshold can be calibrated, the reference value is set to 20V), the electric quantity of the storage battery is sufficient at the moment, and the power supply is not needed.
303. And if the current power supply voltage is smaller than the preset power supply voltage threshold value, determining the current state of charge value of the power battery.
If the current power supply voltage is smaller than the preset power supply voltage threshold, the storage battery is proved to need to be charged, at the moment, the battery State of Charge (SOC) of the power battery is obtained, and if the SOC of the power battery is lower than the preset State of Charge threshold (the threshold can be calibrated, the reference value is set to be 20% SOC), the power battery is in a State of lack of Charge, and at the moment, the charging cannot be carried out.
304. And if the current state of charge value is greater than the preset state of charge threshold value, controlling the power battery to supplement electricity for the storage battery.
If the current state of charge value is greater than the preset state of charge threshold value, the power battery is indicated to be sufficient in electric quantity at the moment, the electric quantity of the power battery meets the electric supplementing requirement, and then a supplementing electric signal can be sent to the whole vehicle controller, so that electric supplementing operation is carried out, and the power battery is controlled to supplement electricity for the storage battery.
In order to ensure the safety of the power supplementing process, the whole vehicle is controlled by a whole vehicle controller to complete self-checking, high-voltage feeding and voltage converter enabling before power supplementing; after self-checking, high-voltage and voltage converter enable are accomplished, inform BMS can carry out the moisturizing, control power battery carries out the moisturizing for the battery, if take place serious whole car trouble at the moisturizing in-process equally, the moisturizing journey is terminated, only under the prerequisite of confirming safety, can carry out the moisturizing operation.
305. And acquiring energy data in the battery supplementing process.
306. Based on the association relation between the preset energy data and the health state of the storage battery, determining the real-time health state of the storage battery according to the energy data.
With respect to steps 305 and 306, the steps 101 and 102 corresponding to the above embodiments have been described in detail, and therefore, detailed description will not be given in this embodiment. After the health state of the storage battery is updated, a power-supplementing completion signal can be sent, then the BMS can be controlled to sleep, and the whole vehicle controller can also sleep.
Based on the same general inventive concept, the present application further protects a battery health status determining device, and the battery health status determining device provided by the present invention is described below, and the battery health status determining device described below and the battery health status determining method described above may be referred to correspondingly.
Fig. 4 is a schematic structural diagram of a device for determining a state of health of a battery according to an embodiment of the present invention.
As shown in fig. 4, a device for determining a state of health of a storage battery according to an embodiment of the present invention includes:
the acquisition module 41 is used for acquiring energy data in the battery power supplementing process;
the determining module 42 is configured to determine a real-time health status of the storage battery according to the energy data based on a correlation between preset energy data and the health status of the storage battery.
According to the storage battery health state determining device provided by the embodiment, energy data in the process of supplementing electricity to the storage battery is obtained; based on the association relation between the preset energy data and the health state, the real-time health state of the storage battery is determined according to the energy data, so that the determination of the health state of the storage battery can be completed according to the energy data in the power supplementing process of the storage battery, and the determination mode is simple and convenient.
Further, the energy data in this embodiment includes chargeable energy and supplementary energy;
correspondingly, the obtaining module 41 is specifically configured to:
acquiring initial voltage of the storage battery corresponding to the time when the storage battery starts to be charged;
determining chargeable energy of the storage battery according to the initial voltage of the storage battery based on the association relation between the voltage and the chargeable energy;
and determining the corresponding electricity supplementing energy when the electricity supplementing of the storage battery is completed according to the power supply parameters of the power battery and the conversion efficiency of the voltage converter.
Further, the obtaining module 41 is specifically further configured to:
acquiring a charging curve of a factory state of the storage battery;
and establishing the association relation between the voltage and chargeable energy when the storage battery is charged according to the charging curve of the factory state of the storage battery.
Further, the obtaining module 41 is specifically further configured to:
acquiring a charging curve of a factory state of the storage battery through a storage battery manufacturer; and/or;
and calibrating a working curve of the battery in a factory state when the battery is charged, so as to obtain a charging curve of the battery in the factory state.
Further, in this embodiment, the power supply determining module is further configured to:
acquiring the current health state of the storage battery;
if the value corresponding to the current state of health of the storage battery is larger than a preset state of health threshold, determining the current power supply voltage of the storage battery;
if the current power supply voltage is smaller than a preset power supply voltage threshold value, determining a current state of charge value of the power battery;
and if the current state of charge value is greater than a preset state of charge threshold value, controlling the power battery to supplement electricity for the storage battery.
Further, the power compensation determination module in this embodiment is specifically configured to:
and acquiring energy data in the battery power supplementing process through a power management system and/or a vehicle-mounted remote information processor.
Further, the summary of the embodiment further includes a wake-up module, configured to:
the power management system and/or the vehicle telematics processor is awakened based on a preset timed wake-up function.
Further, the power supply determining module in this embodiment is specifically further configured to:
the whole vehicle controller controls the whole vehicle to finish self-checking, high-voltage loading and voltage converter enabling;
and after the self-checking, the upper high voltage and the voltage converter are enabled, controlling the power battery to supplement electricity for the storage battery.
Fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
As shown in fig. 5, the electronic device may include: processor 510, communication interface (Communications Interface) 520, memory 530, and communication bus 540, wherein processor 510, communication interface 520, memory 530 complete communication with each other through communication bus 540. Processor 510 may invoke logic instructions in memory 530 to perform a battery state of health determination method comprising: acquiring energy data in the battery power supplementing process; and determining the real-time health state of the storage battery according to the energy data based on the association relation between the preset energy data and the health state of the storage battery.
The application also provides a working machine which adopts the method for determining the health state of the storage battery according to any embodiment to determine the health state of the vehicle-mounted storage battery of the working machine.
Further, the logic instructions in the memory 530 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform 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, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method of determining the state of health of a battery provided by the methods described above, the method comprising: acquiring energy data in the battery power supplementing process; and determining the real-time health state of the storage battery according to the energy data based on the association relation between the preset energy data and the health state of the storage battery.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the above provided battery state of health determination methods, the method comprising: acquiring energy data in the battery power supplementing process; and determining the real-time health state of the storage battery according to the energy data based on the association relation between the preset energy data and the health state of the storage battery.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A method for determining a state of health of a battery, comprising:
energy data in the battery supplementing process is obtained through the BMS; the components for supplementing electricity to the storage battery comprise a power battery, the BMS, a DCDC converter and a controller; the energy data includes chargeable energy and supplementary energy; correspondingly, the obtaining the energy data in the battery recharging process comprises the following steps: acquiring initial voltage of the storage battery corresponding to the time when the storage battery starts to be charged; determining chargeable energy of the storage battery according to the initial voltage of the storage battery based on the association relation between the voltage and the chargeable energy; determining corresponding electricity supplementing energy when the electricity supplementing of the storage battery is completed according to the power supply parameters of the power battery and the conversion efficiency of the voltage converter; the power supply parameters of the power battery comprise power supply voltage and power supply current; the supplementary energy is calculated according to the following formula:wherein Pack refers to a power battery, and the voltage Uplack and the current Iplack output of the power battery are the total power of the power battery, eta DCDC Conversion efficiency for converting DC high voltage into DC low voltage for DCDC converter, the efficiency being constant, P c Power loss to power the battery to the various controllers;
based on the association relation between the preset energy data and the health state of the storage battery, determining the real-time health state of the storage battery according to the energy data;
the power supplementing process comprises the time when charging is just started to any time when charging is completed, wherein the energy data comprise chargeable energy and power supplementing energy, the chargeable energy refers to the maximum energy which can be received by the storage battery when the storage battery is determined to be required to be supplemented, and the power supplementing energy refers to the energy in the storage battery when the storage battery is completed to be charged, namely the storage battery reaches a full-power state;
the association relation between the preset energy data and the health state is that the real-time health state of the storage battery is determined according to the ratio of the energy of the supplementing energy to the chargeable energy, and the real-time health state refers to the health state of the storage battery after the current charging is completed;
before the energy data in the battery recharging process is obtained, the method further comprises the following steps:
acquiring the current health state of the storage battery;
if the value corresponding to the current health state of the storage battery is larger than a preset health state threshold value, determining the current power supply voltage of the storage battery;
if the current power supply voltage is smaller than a preset power supply voltage threshold value, determining a current state of charge value of the power battery;
if the current state of charge value is larger than a preset state of charge threshold value, controlling the power battery to supplement electricity for the storage battery;
before the power battery is controlled to supplement electricity for the storage battery, the method further comprises the following steps:
the whole vehicle controller controls the whole vehicle to finish self-checking, high-voltage loading and voltage converter enabling;
and after the self-checking, the upper high voltage and the voltage converter are enabled, controlling the power battery to supplement electricity for the storage battery.
2. The method for determining a state of health of a battery according to claim 1, wherein before the obtaining the initial voltage of the battery corresponding to the time when the battery starts to be charged, further comprises:
acquiring a charging curve of a factory state of the storage battery;
and establishing the association relation between the voltage and chargeable energy when the storage battery is charged according to the charging curve of the delivery state of the storage battery.
3. The method of claim 2, wherein the obtaining a charge profile of a factory state of the battery comprises:
acquiring a charging curve of a factory state of the storage battery through a storage battery manufacturer; and/or;
and calibrating a working curve of the battery in a factory state when the battery is charged, so as to obtain a charging curve of the battery in the factory state.
4. The method of claim 1, wherein the obtaining energy data during the battery recharging process comprises:
and acquiring energy data in the battery power supplementing process through a power management system and/or a vehicle-mounted remote information processor.
5. The method for determining the state of health of a battery according to claim 4, wherein before the energy data in the battery recharging process is acquired by the power management system and/or the on-board telematics processor, further comprises:
and waking up the power management system and/or the vehicle-mounted remote information processor based on a preset timing wake-up function.
6. A battery state of health determination apparatus, comprising:
the acquisition module is used for acquiring energy data in the battery supplementing process through the BMS; the components for supplementing electricity to the storage battery comprise a power battery, the BMS, a DCDC converter and a controller; the energy data includes chargeable energy and supplementary energy; correspondingly, the obtaining the energy data in the battery recharging process comprises the following steps: acquiring initial voltage of the storage battery corresponding to the time when the storage battery starts to be charged; determining chargeable energy of the storage battery according to the initial voltage of the storage battery based on the association relation between the voltage and the chargeable energy; determining corresponding electricity supplementing energy when the electricity supplementing of the storage battery is completed according to the power supply parameters of the power battery and the conversion efficiency of the voltage converter; the power supply parameters of the power battery comprise power supply voltage and power supply current; the supplementary energy is calculated according to the following formula: wherein Pack refers to a power battery, and the voltage Uplack and the current Iplack output of the power battery are the total power of the power battery, eta DCDC Conversion efficiency for converting DC high voltage into DC low voltage for DCDC converter, the efficiency being constant, P c Power loss to power the battery to the various controllers;
the determining module is used for determining the real-time health state of the storage battery according to the energy data based on the association relation between the preset energy data and the health state of the storage battery;
the power supplementing process comprises the time when charging is just started to any time when charging is completed, wherein the energy data comprise chargeable energy and power supplementing energy, the chargeable energy refers to the maximum energy which can be received by the storage battery when the storage battery is determined to be required to be supplemented, and the power supplementing energy refers to the energy in the storage battery when the storage battery is completed to be charged, namely the storage battery reaches a full-power state;
the association relation between the preset energy data and the health state is that the real-time health state of the storage battery is determined according to the ratio of the energy of the supplementing energy to the chargeable energy, and the real-time health state refers to the health state of the storage battery after the current charging is completed;
before the energy data in the battery recharging process is obtained, the method further comprises the following steps:
acquiring the current health state of the storage battery;
if the value corresponding to the current health state of the storage battery is larger than a preset health state threshold value, determining the current power supply voltage of the storage battery;
if the current power supply voltage is smaller than a preset power supply voltage threshold value, determining a current state of charge value of the power battery;
if the current state of charge value is larger than a preset state of charge threshold value, controlling the power battery to supplement electricity for the storage battery;
before the power battery is controlled to supplement electricity for the storage battery, the method further comprises the following steps:
the whole vehicle controller controls the whole vehicle to finish self-checking, high-voltage loading and voltage converter enabling;
and after the self-checking, the upper high voltage and the voltage converter are enabled, controlling the power battery to supplement electricity for the storage battery.
7. A working machine characterized in that it determines the state of health of an in-vehicle battery using the battery state of health determination method according to any one of claims 1 to 5.
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