CN111426973A - Battery health state detection method and device - Google Patents
Battery health state detection method and device Download PDFInfo
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- CN111426973A CN111426973A CN202010337533.4A CN202010337533A CN111426973A CN 111426973 A CN111426973 A CN 111426973A CN 202010337533 A CN202010337533 A CN 202010337533A CN 111426973 A CN111426973 A CN 111426973A
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- 230000036541 health Effects 0.000 title claims abstract description 87
- 238000001514 detection method Methods 0.000 title claims description 29
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 28
- 230000003862 health status Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000036449 good health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
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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]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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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]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
-
- 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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
Abstract
The invention discloses a method and a device for detecting the health state of a battery, wherein the method comprises the following steps: acquiring the residual capacity before the battery is charged; after the battery is fully charged, determining the current battery capacity of the battery, wherein the battery capacity is equal to the sum of the charging amount required by the current charging and the residual capacity; determining a state of health of the battery by comparing a battery capacity of the battery to a rated capacity. The invention judges the health state of the battery by comparing the current battery capacity with the rated capacity of the battery, thereby being capable of simply and efficiently estimating the health state of the battery and providing a maintenance scheme of the current health state of the battery for users.
Description
Technical Field
The invention relates to the technical field of rechargeable batteries, in particular to a battery health state detection method and device.
Background
The lithium ion power battery is widely applied to the fields of electric automobiles, electric tools, base station standby power supplies and the like. The health state of the battery pack is accurately mastered, the charging and discharging performance of the battery pack can be guaranteed, the estimation precision of the state of charge of the battery is improved, meanwhile, a basis is provided for the detection and diagnosis of the battery pack, and unnecessary faults and accidents are avoided.
In the working process of the electric automobile, the battery is often required to be kept in a good health state for a long time, and if the service life of the battery exceeds the service life of the battery or the number of charge and discharge cycles reaches the upper limit, the energy stored in the battery is gradually attenuated, so that the endurance mileage of the electric automobile is seriously shortened. Therefore, the health state of the battery often needs to be estimated in the use process of the battery, and early warning information is sent out when the service life of the battery reaches the end so as to prompt a user or an equipment provider to replace the battery in time.
Disclosure of Invention
The embodiment of the invention provides a method and a device for detecting the health state of a battery, which aim to realize timely replacement of the battery with the end of life. The technical scheme is as follows:
in a first aspect, a battery state of health detection method is provided, the method comprising:
acquiring the residual capacity before the battery is charged;
after the battery is fully charged, determining the current battery capacity of the battery, wherein the battery capacity is equal to the sum of the charging amount required by the current charging and the residual capacity;
determining a state of health of the battery by comparing a battery capacity of the battery to a rated capacity.
Optionally, the step of determining the state of health of the battery by comparing the battery capacity of the battery with the rated capacity includes:
determining that the battery is healthy if the battery capacity is greater than or equal to the rated capacity;
and if the battery capacity is smaller than the rated capacity, determining the state of health of the battery through the ratio of the battery capacity to the rated capacity.
In a second aspect, another battery state of health detection method is provided, the method comprising:
acquiring the residual capacity of the current battery;
determining the current discharge capacity of the battery;
determining the battery capacity of the battery, wherein the battery capacity of the battery is the sum of the residual capacity and the discharge capacity;
determining a state of health of the battery by comparing a battery capacity of the battery to a rated capacity.
Optionally, the calculation formula of the discharge capacity of the battery is as follows:
C＝A.h*(1-SOC)；
where C denotes a discharge capacity, A.h denotes a rated capacity of the battery, and SOC denotes a ratio of a remaining capacity of the battery to a capacity of a fully charged state of the battery.
Optionally, the step of determining the state of health of the battery by comparing the battery capacity of the battery with the rated capacity includes:
determining that the battery is healthy if the battery capacity is greater than or equal to the rated capacity;
and if the battery capacity is smaller than the rated capacity, determining the state of health of the battery through the ratio of the battery capacity to the rated capacity.
Optionally, after the step of determining the state of health of the battery by comparing the battery capacity of the battery with the rated capacity, the method further includes:
and sending the health state of the battery to a charging server.
In a third aspect, a battery state of health detection apparatus is provided, the apparatus comprising:
the acquisition module is used for acquiring the residual capacity of the battery before charging;
the determining module is used for determining the current battery capacity of the battery after the battery is fully charged, wherein the battery capacity is equal to the sum of the charging amount required by the current charging and the residual capacity;
and the comparison module is used for determining the state of health of the battery by comparing the battery capacity and the rated capacity of the battery.
Optionally, the comparison module is specifically configured to:
determining that the battery is healthy when the battery capacity is greater than or equal to the rated capacity;
when the battery capacity is less than the rated capacity, the state of health of the battery is determined by the ratio of the battery capacity to the rated capacity.
In a fourth aspect, another battery state of health detection apparatus is provided, the apparatus comprising:
the acquisition module is used for acquiring the residual capacity of the current battery;
the determining module is used for determining the current discharge capacity of the battery and determining the battery capacity of the battery, wherein the battery capacity of the battery is the sum of the residual capacity and the discharge capacity;
and the comparison module is used for determining the state of health of the battery by comparing the battery capacity and the rated capacity of the battery.
Optionally, the calculation formula of the discharge capacity of the battery is as follows:
C＝A.h*(1-SOC)；
where C denotes a discharge capacity, A.h denotes a rated capacity of the battery, and SOC denotes a ratio of a remaining capacity of the battery to a capacity of a fully charged state of the battery.
Optionally, the comparison module is specifically configured to:
determining that the battery is healthy when the battery capacity is greater than or equal to the rated capacity;
when the battery capacity is less than the rated capacity, the state of health of the battery is determined by the ratio of the battery capacity to the rated capacity.
Optionally, the apparatus further includes a sending module, where the sending module is configured to send the state of health of the battery to a charging server.
In a fifth aspect, an electronic device is provided, which includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of the first aspect when executing the program stored in the memory.
In a sixth aspect, an electronic device is provided, which includes a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of the second aspect when executing the program stored in the memory.
According to the embodiment of the invention, the current battery capacity of the battery is compared with the rated capacity, and the health state of the battery is judged, so that the health state of the battery can be estimated simply and efficiently, and a maintenance scheme of the current health state of the battery is provided for a user.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart of a battery state of health detection method according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for detecting a state of health of a battery according to an embodiment of the present invention;
fig. 3 is a block diagram of a battery health status detection apparatus according to an embodiment of the present invention;
fig. 4 is a block diagram of another battery state of health detection apparatus according to an embodiment of the present invention.
Fig. 5 is a block diagram of an electronic device according to an embodiment of the present invention;
fig. 6 is a block diagram of another electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of a method for detecting a state of health of a battery according to an embodiment of the present invention is provided, where the method may be applied to a charging server, that is, executed by the charging server, and the method specifically includes the following steps.
In step 101, the remaining capacity before charging the battery is determined.
In the scene of charging electric automobile, can use and fill electric pile and charge for electric automobile. After the vehicle battery is connected with the charging pile, if the charging server judges that the vehicle battery meets the charging condition, a charging instruction is sent to the charging pile. When receiving a charging instruction, the charging pile starts to charge the battery. Before charging is started, the current residual capacity of the battery, namely the residual capacity before charging of the battery, is obtained, and then the residual capacity of the battery is sent to a charging server. Before the charging pile starts to charge, basic information of the battery is also acquired, and the basic information of the battery can comprise rated voltage, rated current and rated capacity of the battery.
And the charging server receives the residual capacity before the battery is charged, which is sent by the charging pile.
It should be noted that the embodiment of the present invention may be applied not only to a scenario in which an electric vehicle is charged, but also to a scenario in which other devices are charged, for example, a scenario in which devices such as an electric tool and a base station backup power supply are charged, and the embodiment of the present invention is not specifically limited to the applicable scenario.
And step 102, after the battery is fully charged, determining the current battery capacity of the battery, wherein the battery capacity is equal to the sum of the charging amount required by the current charging and the residual capacity.
And after the charging pile fully charges the battery, stopping charging, and sending the charging amount required by the charging to a charging server. The charging server may determine the current battery capacity of the battery based on the amount of charge required for the present charge and the remaining capacity before the battery charge, that is, the battery capacity is equal to the sum of the amount of charge required for the present charge and the remaining capacity before the battery charge.
The charge server may determine the state of health of the battery by comparing the battery capacity to a rated capacity. Determining that the battery is healthy if the battery capacity is greater than or equal to the rated capacity; if the battery capacity is less than the rated capacity, the state of health of the battery is determined by the ratio of the battery capacity to the rated capacity. Further, when the battery capacity is smaller than the rated capacity, the state of health of the battery may be represented by a ratio of the battery capacity to the rated capacity.
After determining the health state of the electric vehicle battery, the charging server may send battery health state information to the user to inform the user of the health state of the electric vehicle battery.
The embodiment of the invention can detect the battery health state under the condition of battery charging, can obtain the battery capacity based on the residual capacity before battery charging and the charging amount required by full charging, and then judge the battery health state by comparing the current battery capacity of the battery with the rated capacity.
The above embodiment is a battery state of health detection method in the case of battery charging, and the battery state of health detection method in the case of no charging is described below.
Referring to fig. 2, a flowchart of another method for detecting a state of health of a battery according to an embodiment of the present invention is provided, where the method is applicable to a detection device, that is, executed by the detection device, and the detection device may be installed on the battery.
In step 201, the remaining capacity of the current battery is determined.
The detection means may detect the battery state of health at a fixed cycle, that is, the detection means performs steps 201 to 204 at a fixed cycle. When detecting the State Of health Of the battery, the detecting device first obtains basic information Of the battery, where the basic information Of the battery may include a current remaining capacity, a rated capacity, and a battery SOC (State Of Charge). The SOC of the battery represents the ratio of the residual capacity of the battery to the capacity of the battery in a fully charged state, and the value range of the SOC is 0-1. When the battery SOC is 0, the battery is completely discharged, and when the battery SOC is 0, the battery is completely fully charged.
The discharge capacity represents the current consumed electric quantity of the battery, and the calculation formula of the discharge capacity of the battery is as follows:
C＝A.h*(1-SOC)；
where C denotes a discharge capacity, A.h denotes a rated capacity of the battery, and SOC denotes a ratio of a remaining capacity of the battery to a capacity of a fully charged state of the battery.
And the detection device calculates the current discharge capacity of the battery according to the formula.
The charge server may determine the state of health of the battery by comparing the battery capacity to a rated capacity. Determining that the battery is healthy if the battery capacity is greater than or equal to the rated capacity; if the battery capacity is less than the rated capacity, the state of health of the battery is determined by the ratio of the battery capacity to the rated capacity. Further, when the battery capacity is smaller than the rated capacity, the state of health of the battery may be represented by a ratio of the battery capacity to the rated capacity.
When the electric automobile provided with the detection device drives into the charging area, the detection device can be automatically connected with WIFI in the charging station, and after the WIFI is connected, the detected health state of the battery is sent to the charging server. The charging server saves the battery health status after receiving the battery health status, and can send the battery health status information to the user to inform the user of the battery health status of the electric vehicle.
The embodiment of the invention can regularly detect the health state of the battery under the condition that the battery is not charged, can obtain the capacity of the battery based on the residual capacity and the consumed discharge capacity of the battery, and judges the health state of the battery by comparing the current capacity of the battery with the rated capacity.
Referring to fig. 3, a block diagram of a battery health status detection apparatus according to an embodiment of the present invention is provided, where the apparatus may be configured in a charging server or the charging server itself, and the apparatus may include:
an obtaining module 301, configured to obtain a remaining capacity before charging a battery;
a determining module 302, configured to determine a current battery capacity of the battery after the battery is fully charged, where the battery capacity is equal to a sum of a charge amount required for the current charging and the remaining capacity;
a comparison module 303, configured to determine a state of health of the battery by comparing a battery capacity of the battery with a rated capacity.
Preferably, the comparison module 303 is specifically configured to:
determining that the battery is healthy when the battery capacity is greater than or equal to the rated capacity;
when the battery capacity is less than the rated capacity, the state of health of the battery is determined by the ratio of the battery capacity to the rated capacity.
The embodiment of the invention can detect the battery health state under the condition of battery charging, can obtain the battery capacity based on the residual capacity before battery charging and the charging amount required by full charging, and then judge the battery health state by comparing the current battery capacity of the battery with the rated capacity.
Referring to fig. 4, a block diagram of a battery state of health detection apparatus according to an embodiment of the present invention is provided, where the apparatus may include:
an obtaining module 401, configured to obtain a remaining capacity of a current battery;
a determining module 402, configured to determine a current discharge capacity of the battery, and determine a battery capacity of the battery, where the battery capacity of the battery is a sum of the remaining capacity and the discharge capacity;
a comparison module 403, configured to determine a state of health of the battery by comparing a battery capacity of the battery with a rated capacity.
Preferably, the discharge capacity of the battery is calculated by the following formula:
C＝A.h*(1-SOC)；
where C denotes a discharge capacity, A.h denotes a rated capacity of the battery, and SOC denotes a ratio of a remaining capacity of the battery to a capacity of a fully charged state of the battery.
Preferably, the comparison module 403 is specifically configured to:
determining that the battery is healthy when the battery capacity is greater than or equal to the rated capacity;
when the battery capacity is less than the rated capacity, the state of health of the battery is determined by the ratio of the battery capacity to the rated capacity.
Preferably, the apparatus further includes a sending module, and the sending module is configured to send the state of health of the battery to a charging server.
The embodiment of the invention can regularly detect the health state of the battery under the condition that the battery is not charged, can obtain the capacity of the battery based on the residual capacity and the consumed discharge capacity of the battery, and judges the health state of the battery by comparing the current capacity of the battery with the rated capacity.
An embodiment of the present invention further provides an electronic device, as shown in fig. 5, which includes a processor 501, a communication interface 502, a memory 503 and a communication bus 504, where the processor 501, the communication interface 502 and the memory 503 complete mutual communication through the communication bus 504,
a memory 503 for storing a computer program;
the processor 501 is configured to implement the battery health status detection method when executing the program stored in the memory 503, and the method includes:
acquiring the residual capacity before the battery is charged;
after the battery is fully charged, determining the current battery capacity of the battery, wherein the battery capacity is equal to the sum of the charging amount required by the current charging and the residual capacity;
determining a state of health of the battery by comparing a battery capacity of the battery to a rated capacity.
The embodiment of the invention can detect the battery health state under the condition of battery charging, can obtain the battery capacity based on the residual capacity before battery charging and the charging amount required by full charging, and then judge the battery health state by comparing the current battery capacity of the battery with the rated capacity.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
An embodiment of the present invention further provides an electronic device, as shown in fig. 6, including a processor 601, a communication interface 602, a memory 603, and a communication bus 604, where the processor 601, the communication interface 602, and the memory 603 complete mutual communication through the communication bus 604,
a memory 603 for storing a computer program;
the processor 601 is configured to implement the battery health status detection method when executing the program stored in the memory 603, and the method includes:
acquiring the residual capacity of the current battery;
determining the current discharge capacity of the battery;
determining the battery capacity of the battery, wherein the battery capacity of the battery is the sum of the residual capacity and the discharge capacity;
determining a state of health of the battery by comparing a battery capacity of the battery to a rated capacity.
The embodiment of the invention can regularly detect the health state of the battery under the condition that the battery is not charged, can obtain the capacity of the battery based on the residual capacity and the consumed discharge capacity of the battery, and judges the health state of the battery by comparing the current capacity of the battery with the rated capacity.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, e.g., from one website site, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DS L)) or wireless (e.g., infrared, wireless, microwave, etc.) manner to another website site, computer, server, or data center.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the embodiments of the apparatus and the electronic device, since they are substantially similar to the embodiments of the method, the description is simple, and the relevant points can be referred to only in the partial description of the embodiments of the method.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A battery state of health detection method, the method comprising:
acquiring the residual capacity before the battery is charged;
after the battery is fully charged, determining the current battery capacity of the battery, wherein the battery capacity is equal to the sum of the charging amount required by the current charging and the residual capacity;
determining a state of health of the battery by comparing a battery capacity of the battery to a rated capacity.
2. The method of claim 1, wherein the step of determining the state of health of the battery by comparing the battery capacity of the battery to a rated capacity comprises:
determining that the battery is healthy if the battery capacity is greater than or equal to the rated capacity;
and if the battery capacity is smaller than the rated capacity, determining the state of health of the battery through the ratio of the battery capacity to the rated capacity.
3. A battery state of health detection method, the method comprising:
acquiring the residual capacity of the current battery;
determining the current discharge capacity of the battery;
determining the battery capacity of the battery, wherein the battery capacity of the battery is the sum of the residual capacity and the discharge capacity;
determining a state of health of the battery by comparing a battery capacity of the battery to a rated capacity.
4. The method of claim 3, wherein the discharge capacity of the battery is calculated by the formula:
C＝A.h*(1-SOC)；
where C denotes a discharge capacity, A.h denotes a rated capacity of the battery, and SOC denotes a ratio of a remaining capacity of the battery to a capacity of a fully charged state of the battery.
5. The method of claim 3, wherein the step of determining the state of health of the battery by comparing the battery capacity of the battery to a rated capacity comprises:
determining that the battery is healthy if the battery capacity is greater than or equal to the rated capacity;
and if the battery capacity is smaller than the rated capacity, determining the state of health of the battery through the ratio of the battery capacity to the rated capacity.
6. The method of claim 3, wherein the step of determining the state of health of the battery by comparing the battery capacity of the battery to a rated capacity is followed by the step of:
and sending the health state of the battery to a charging server.
7. A battery state of health detection apparatus, the apparatus comprising:
the acquisition module is used for acquiring the residual capacity of the battery before charging;
the determining module is used for determining the current battery capacity of the battery after the battery is fully charged, wherein the battery capacity is equal to the sum of the charging amount required by the current charging and the residual capacity;
and the comparison module is used for determining the state of health of the battery by comparing the battery capacity and the rated capacity of the battery.
8. The apparatus of claim 7, wherein the comparison module is specifically configured to:
determining that the battery is healthy when the battery capacity is greater than or equal to the rated capacity;
when the battery capacity is less than the rated capacity, the state of health of the battery is determined by the ratio of the battery capacity to the rated capacity.
9. A battery state of health detection apparatus, the apparatus comprising:
the acquisition module is used for acquiring the residual capacity of the current battery;
the determining module is used for determining the current discharge capacity of the battery and determining the battery capacity of the battery, wherein the battery capacity of the battery is the sum of the residual capacity and the discharge capacity;
and the comparison module is used for determining the state of health of the battery by comparing the battery capacity and the rated capacity of the battery.
10. The apparatus of claim 9, wherein the discharge capacity of the battery is calculated by the formula:
C＝A.h*(1-SOC)；
where C denotes a discharge capacity, A.h denotes a rated capacity of the battery, and SOC denotes a ratio of a remaining capacity of the battery to a capacity of a fully charged state of the battery.
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| CN202010337533.4A CN111426973A (en) | 2020-04-26 | 2020-04-26 | Battery health state detection method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112172608A (en) * | 2020-09-11 | 2021-01-05 | 广州小鹏汽车科技有限公司 | Battery monitoring method and device, vehicle and storage medium |
| CN113466716A (en) * | 2021-06-17 | 2021-10-01 | 深圳市道通科技股份有限公司 | Battery health state measuring and calculating method and related equipment |
| CN114236392A (en) * | 2021-11-29 | 2022-03-25 | 广东邦普循环科技有限公司 | Communication method and device of lithium battery and life cycle statistical method |
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