CN112505567B - Battery state of health evaluation system - Google Patents
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- CN112505567B CN112505567B CN202011199849.8A CN202011199849A CN112505567B CN 112505567 B CN112505567 B CN 112505567B CN 202011199849 A CN202011199849 A CN 202011199849A CN 112505567 B CN112505567 B CN 112505567B
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- 238000011156 evaluation Methods 0.000 title claims abstract description 56
- 230000036541 health Effects 0.000 title claims abstract description 48
- 238000001514 detection method Methods 0.000 claims abstract description 57
- 238000004364 calculation method Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 230000003862 health status Effects 0.000 description 11
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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]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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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
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Abstract
The application provides a battery state of health evaluation system, mainly comprising a control module, wherein the control module controls a charging device to execute at least two charging operations for a battery to be tested, and in each charging operation, according to a preset state of charge parameter to be tested, a first current parameter and a second current parameter, when the current state of charge of the battery to be tested meets the state of charge parameter to be tested, the control module controls the charging device to switch the charging current of the battery to be tested by using the first current parameter and the second current parameter, and obtains the voltage value of the battery to be tested corresponding to each charging operation, so that a calculation module can calculate each relative battery detection value of the battery to be tested corresponding to each charging operation according to the voltage value of the battery to be tested, and then the evaluation module can obtain the battery state of health evaluation result of the battery to be tested according to each relative battery detection value. Therefore, the application can complete the evaluation of the battery health state in the charging process of the battery to be tested, so as to simplify the battery health evaluation operation flow.
Description
Technical Field
The embodiment of the application relates to the technical field of battery detection, in particular to a battery health state evaluation system.
Background
With the rapid development of the global electric automobile industry in recent years, the holding capacity of electric automobiles is continuously increased, and the power battery is taken as an important component part in the three-electric system of the electric automobiles, and the cost of the power battery is about one third of the cost of the whole automobile. The health of the power battery directly determines the performance and the residual value of the vehicle, and is a key factor affecting the user experience of the electric automobile.
However, the current detection of the state of health of the power battery is mainly performed by a professional battery testing device, which collects key parameters such as the capacity and the impedance of the battery in the process of charging and discharging the battery, and performs analysis and calculation according to the key parameters. However, the detection method has complicated operation steps, large resource investment, high detection time and labor cost, and difficult large-scale application.
In view of this, developing a power battery health detection technology with high efficiency and low cost has great significance and value.
Disclosure of Invention
In view of the above, the present application provides a battery state of health evaluation system that can overcome or at least partially solve the above-described problems.
A first aspect of the present application provides a battery state of health evaluation system, comprising: the control module is used for controlling the charging equipment to execute charging operation for the battery to be tested at least twice, and in each charging operation, the control module is used for controlling the charging equipment to switch the charging current of the battery to be tested by utilizing the first current parameter and the second current parameter and acquiring the voltage value of the battery to be tested corresponding to the charging operation when detecting that the current state of the battery to be tested meets the state of charge parameter to be tested according to the preset state of charge parameter to be tested, the first current parameter and the second current parameter; the calculating module is used for calculating each relative battery detection value of the battery to be detected corresponding to each charging operation according to each voltage value, the first current parameter and the second current parameter of the battery to be detected corresponding to each charging operation; and the evaluation module is used for obtaining a battery health state evaluation result of the battery to be tested according to each relative battery detection value of the battery to be tested.
Optionally, the control module, the calculation module and the evaluation module are all arranged on the charging device.
Optionally, the charging device is also in communication connection with a cloud server; the control module is arranged on the charging equipment, and the calculation module and the evaluation module are arranged on the cloud server; or the control module and the calculation module are arranged on the charging equipment, and the evaluation module is arranged on the cloud server; the charging operation of at least two times of the same battery to be tested is executed by the same charging equipment or different charging equipment.
Optionally, the control module further includes obtaining battery identification information of the battery to be tested, and transmitting the battery identification information to the cloud server by the charging device, so that the evaluation module integrates at least two opposite battery detection values of the same battery to be tested according to the battery identification information, thereby obtaining the battery health state evaluation result of the battery to be tested.
Optionally, the second current parameter is less than the first current parameter and the second current parameter is not less than 0 ampere.
Optionally, the voltage value of the battery to be tested corresponding to the charging operation includes a first voltage value and a second voltage value, and the control module includes: controlling the charging equipment to execute the charging operation on the battery to be tested by using the first current parameter, and controlling the charging equipment to start switching the charging current from the first current parameter to the second current parameter when detecting that the current state of charge of the battery to be tested meets the state of charge parameter to be tested, and obtaining a first voltage value corresponding to a first switching time of the battery to be tested from the first current parameter to the second current parameter; when the actual charging time of the second current parameter meets the preset current switching duration, controlling the charging equipment to start switching the charging current from the second current parameter to the first current parameter, and obtaining a second voltage value of a second switching time of the battery to be tested from the second current parameter to the first current parameter.
Optionally, the preset current switching duration is not less than 1 second and not more than 3 hours.
Optionally, the control module further comprises: collecting each voltage value of the battery to be tested corresponding to each time frame according to a preset interval time; the time frame corresponding to the first switching time is a frame before the time frame when the battery to be tested starts to be switched from the first current parameter to the second current parameter; the time frame corresponding to the second switching time is a frame before the time frame when the battery to be tested starts to switch from the second current parameter to the first current parameter.
Optionally, the calculation module further includes obtaining the relative battery detection value of the battery to be detected corresponding to the charging operation according to a preset conversion rule, the first current parameter, the second current parameter, the first voltage value, and the second voltage value; wherein, the preset conversion rule is as follows:
Wherein y is the relative battery detection value; the M is the first voltage value, the N is the second voltage value, and the A is the first current parameter; and B is the second current parameter.
Optionally, the evaluation module includes obtaining an evaluation result of better battery health status when a difference value of the relative battery detection values is smaller according to the relative battery detection values of the battery to be tested.
Optionally, the state of charge parameter to be measured includes at least one state of charge sub-parameter to be measured, and the control module further includes providing setting each of the first current parameter and each of the second current parameter corresponding to each of the state of charge sub-parameters to be measured.
Optionally, the charging device is provided in a charging post or a battery exchange station.
As can be seen from the above technical solutions, in the battery health status evaluation system provided by the embodiments of the present application, by performing at least two charging actions on a battery to be tested, and changing the charging current of the battery to be tested in each charging operation process, each relative battery detection value of the battery to be tested corresponding to each charging operation is obtained, and the health status evaluation result of the battery to be tested is obtained according to each relative battery detection value of the battery to be tested corresponding to each charging operation.
Drawings
For a clearer description of embodiments of the application or of the solutions of the prior art, the drawings that are required to be used in the description of the embodiments or of the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments described in the embodiments of the application, and that other drawings may be obtained by those skilled in the art according to these drawings:
Fig. 1 to fig. 4 are schematic diagrams illustrating a battery state of health evaluation system according to various embodiments of the present application.
Element labels
100: A battery state of health assessment system; 101: a control module; 102: a computing module; 103: an evaluation module; 2.2 a to 2n: a charging device; 3: the cloud server; 4: and (5) testing the battery.
Detailed Description
In order to better understand the technical solutions in the embodiments of the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the present application, shall fall within the scope of protection of the embodiments of the present application.
The following further describes specific implementations of embodiments of the present application in conjunction with the accompanying drawings of embodiments of the present application.
The battery state of health evaluation system 100 of the present application is suitable for evaluating the state of health of a rechargeable battery (i.e., a battery to be tested) of a new energy automobile, and the charging equipment is controlled to perform at least two charging operations on the battery to be tested, so as to obtain each relative battery detection value of the battery to be tested corresponding to each charging operation, and evaluate the state of health of the battery to be tested according to the relative battery detection value.
As shown in fig. 1, the battery state of health evaluation system 100 of the present embodiment may be integrally installed in the charging device 2, and mainly includes a control module 101, a calculation module 102, and an evaluation module 103.
In the present embodiment, the charging apparatus 2 may be provided in a charging stake or a battery exchange station for providing a charging operation for a battery to be tested of a vehicle.
The control module 101 is configured to control the charging device 2 to perform at least two charging operations on the battery 4 to be tested, and in each charging operation, the control module 101 may control the charging device 2 to switch a charging current of the battery 4 to be tested according to a preset state of charge parameter to be tested, a first current parameter, and a second current parameter when detecting that a current state of charge of the battery 4 to be tested meets the state of charge parameter to be tested, and obtain a voltage value of the battery 4 to be tested corresponding to the charging operation.
Optionally, the control module 101 may be further configured to provide a to-be-measured state of charge parameter, a first current parameter, and a second current parameter of the to-be-measured battery 4, so as to control the charging device 2 to perform a corresponding charging operation on the to-be-measured battery 4.
In this embodiment, the state of charge parameter (SOC) of the battery to be measured is any value between 0% and 100%, for example, 25% of the state of charge to be measured, 50% of the state of charge to be measured, 75% of the state of charge to be measured, and so on.
In this embodiment, the second current parameter (e.g., current B) is not less than 0 ampere, i.e., 0.ltoreq.B < A, less than the first current parameter (e.g., current A).
Alternatively, the state of charge parameter under test may comprise one or more state of charge sub-parameters under test.
In this embodiment, the control module 101 may provide setting a plurality of sub-parameters of the state of charge to be measured (e.g. 25% of the state of charge to be measured, 50% of the state of charge to be measured), and setting each of the first current parameter and the second current parameter corresponding to each of the different sub-parameters of the state of charge to be measured.
Optionally, the first current parameter and the second current parameter corresponding to the different state of charge sub-parameters to be tested may be the same or different, depending on the actual test requirements, which the present application is not limited to.
For example, the first current parameter and the second current parameter corresponding to the first state-of-charge sub-parameter SOC1 (e.g., 25% of the state of charge) may be set to be A1 and B1, respectively, the first current parameter and the second current parameter corresponding to the second state-of-charge sub-parameter SOC2 (e.g., 50% of the state of charge) may be set to be A2 and B2, respectively, where A1 and A2 may be equal or unequal, and similarly, B1 and B2 may be equal or unequal.
In this embodiment, the to-be-measured state of charge parameter, the first current parameter, and the second current parameter according to each charging operation performed on the to-be-measured battery are the same.
For example, if the to-be-measured state of charge parameter, the first current parameter, and the second current parameter implemented for the first charging operation performed on the to-be-measured battery are SOC1, A1, and B1, respectively, the to-be-measured state of charge parameter, the first current parameter, and the second current parameter implemented for the second charging operation performed on the to-be-measured battery should also be SOC1, A1, and B1.
In this embodiment, the voltage value of the battery to be tested corresponding to the charging operation includes a first voltage value and a second voltage value. The control module 101 may control the charging device 2 to perform charging operation on the battery 4 to be tested by using a first current parameter (e.g. a amp), and when detecting that the current state of charge of the battery 4 to be tested meets the state of charge parameter to be tested (e.g. 25% of the state of charge), control the charging device 2 to switch the charging current from the first current parameter (e.g. a amp) to a second current parameter (e.g. B amp), and obtain a first voltage value (e.g. M v) corresponding to a first switching time of the battery 2 to be tested from the first current parameter to the second current parameter; and when the actual charging time of the second current parameter meets the preset current switching duration, the charging device 2 is controlled to switch the charging current from the second current parameter (for example, B amperes) to the first current parameter (for example, a amperes), and a second voltage value (for example, N volts) of a second switching time of the battery 4 to be tested from the second current parameter to the first current parameter is obtained.
In the present embodiment, if the second current parameter is set to 0 ampere, the operation of switching the charging current of the battery 4 to be measured from the first current parameter to the second current parameter is equivalent to standing the battery 4 to be measured at the charging current of 0 ampere.
Optionally, the preset current switching duration is not less than 1 second and not more than 3 hours.
Alternatively, the control module 101 may collect each voltage value of the battery 4 to be measured corresponding to each time frame according to a preset interval time.
Alternatively, the set interval time frame is, for example, 1 second/frame (i.e. the voltage value is collected every 1 second), but not limited thereto, and may be set to 0.5 second/frame (i.e. the voltage value is collected every 0.5 second), 2 seconds/frame (i.e. the voltage value is collected every 2 seconds) according to practical requirements.
In this embodiment, the present application is not limited to specific setting of the interval time frame, and generally, the smaller the setting value of the interval time frame is, the better the measured accuracy is, and the user can set the interval time frame according to the actual detection requirement and the computing capability of the detection device.
Optionally, the time frame corresponding to the first switching time is a frame before the time frame when the battery 4 to be measured starts to switch from the first current parameter to the second current parameter, and the time frame corresponding to the second switching time is a frame before the time frame when the battery 4 to be measured starts to switch from the second current parameter to the first current parameter.
For example, when the interval time frame is set to 1 second/frame (i.e. the voltage value is collected every 1 second), and the charging current of the battery to be measured starts to switch from the first current parameter to the second current parameter or from the second current parameter to the first current parameter in the time frame corresponding to the 5 th second, the first switching time or the second switching time is the time frame corresponding to the 4 th second.
For another example, when the interval time frame is set to 2 seconds/frame (i.e. the voltage value is collected every 2 seconds), and the charging current of the battery to be measured starts to switch from the first current parameter to the second current parameter or from the second current parameter to the first current parameter in the time frame corresponding to the 5 th second, the first switching time or the second switching time is the time frame corresponding to the 3 rd second.
The calculating module 102 is configured to calculate each relative battery detection value of the battery 4 to be measured corresponding to each charging operation according to each voltage value, the first current parameter, and the second current parameter of the battery 4 to be measured corresponding to each charging operation.
In this embodiment, the calculation module 102 may calculate the first current parameter (a), the second current parameter (B), the first voltage value (M), and the second voltage value (N) according to a preset conversion rule, so as to obtain each relative battery detection value (y) of the battery to be tested corresponding to each charging operation.
In this embodiment, the preset conversion rule is:
Wherein y is a relative battery detection value; m is the first voltage value, N is the second voltage value, A is the first current parameter; b is a second current parameter.
The evaluation module 103 is configured to obtain a battery health status evaluation result of the battery to be tested according to each relative battery detection value of the battery to be tested 4.
In this embodiment, the evaluation module 103 can obtain an evaluation result of better battery health status according to each relative battery detection value of the battery 4 to be tested when the difference between each relative battery detection value is smaller, that is, the closer each relative battery detection value of the battery 4 to be tested corresponding to each charging operation is, the better the health degree (SOH) of the battery to be tested is.
Optionally, the battery state of health evaluation system 100 of the present embodiment may further detect parameters such as the highest voltage value, the lowest voltage value, the total voltage value, the average voltage value of the battery 4 to be tested, and the voltage values of each battery cell in the battery 4 to be tested, so as to more accurately evaluate the degree of health of the battery 4 to be tested.
In summary, in the battery health status evaluation system according to the embodiment of the present application, the charging current of the battery to be measured is changed during at least two charging operations performed on the battery to be measured, so as to obtain the voltage value of the battery to be measured when the charging current is changed, thereby obtaining the relative battery detection value of the battery to be measured, and obtaining the health detection result of the battery to be measured according to each relative battery detection value of the battery to be measured corresponding to each charging operation.
Therefore, the application can finish the operation of detecting the health degree of the battery in the battery charging process, not only can save the battery detection time and simplify the battery detection operation so as to improve the battery detection experience of the vehicle owner, but also does not need to be provided with independent battery detection equipment, thereby reducing the battery detection cost.
As shown in fig. 2, an architecture diagram of a battery state of health assessment system 100 according to another embodiment of the present application is shown.
In this embodiment, the charging device 2 is communicatively connected to the cloud server 3, the control module 101 and the calculation module 102 in the battery state of health evaluation system 100 are disposed in the charging device 2, and the evaluation module 103 is disposed in the cloud server 3.
The main functions of the control module 101 and the calculation module 102 of the present embodiment are substantially the same as those of the embodiment shown in fig. 1, and only differences will be described below.
In this embodiment, the control module 101 is further configured to obtain the battery identification information of the battery 4 to be tested, and transmit the battery identification information to the cloud server 3 by means of the charging device 2, so that the evaluation module 103 disposed in the cloud server 3 integrates at least two relative battery detection values of the same battery 5 to be tested according to the battery identification information, thereby obtaining the battery health status evaluation result of the battery 4 to be tested.
Specifically, the control module 101 is configured to obtain battery identification information of the battery 4 to be tested and control the charging device 2 to perform at least two charging operations on the battery 4 to be tested, so that the computing module 102 calculates each relative battery detection value of the battery 4 to be tested corresponding to each charging operation, and then the charging device 2 uploads the battery identification information and each relative battery detection value to the cloud server 3, so that the evaluation module 103 of the cloud server 3 classifies each relative battery detection value according to the battery identification information to integrate each relative battery detection value of the same battery 4 to be tested, thereby evaluating the health status of each battery 4 to be tested.
As shown in fig. 3, an architecture diagram of a battery state of health assessment system 100 in accordance with yet another embodiment of the present application is shown. In the present embodiment, the control module 101 in the battery state of health evaluation system 100 is disposed in the charging device 2, and the calculation module 102 and the evaluation module 103 are both disposed in the cloud server 3.
Specifically, the control module 101 is configured to obtain battery identification information of the battery 4 to be tested, control the charging device 2 to perform at least two charging operations on the battery 4 to be tested, obtain each voltage value of the battery 4 to be tested corresponding to each charging operation, and upload, by the charging device 2, the battery identification information of the battery 4 to be tested, a preset state of charge parameter to be tested, a first current parameter, a second current parameter, and each voltage value of the battery 4 to be tested corresponding to each charging operation to the cloud server 3, so that the computing module 102 computes each relative battery detection value of the battery 4 to be tested corresponding to each charging operation according to each voltage value, the first current parameter, and the second current parameter of the battery 4 to be tested, and then the evaluation module 103 classifies each relative battery detection value according to the battery identification information to integrate each relative battery detection value of the same battery 4 to be tested, thereby evaluate the health status of each battery 4 to be tested.
It should be noted that, in the embodiments shown in fig. 2 and 3, at least two charging operations performed on the same battery 2 to be tested may be completed by the same charging device 2 or different charging devices 2 (for example, one or more of the charging devices 2a to 2n shown in fig. 4), so as to further improve the flexibility of the battery health status assessment operation, so as to improve the use experience of the vehicle owner.
In summary, the battery health status evaluation system provided by the application can complete the health detection operation of the battery to be detected in the process of executing the charging operation of the battery to be detected, thereby saving the battery detection time and simplifying the battery detection process. In addition, the battery detection system is not required to be additionally arranged, so that the battery detection cost can be reduced.
In addition, the battery health state evaluation system provided by the application analyzes the change trend of the battery health State (SOH) by establishing each relative battery detection value of the battery to be tested in each charging operation, so that the objectivity of the health degree detection result of the battery to be tested can be improved.
In addition, the battery state of health evaluation system can provide that the battery to be tested can be charged in different charging equipment, and the charging equipment is utilized to upload the voltage value or the relative battery detection value of the battery to be tested corresponding to each charging operation to the cloud server, so that the cloud server can obtain the battery state of health evaluation result of the battery to be tested by integrating the relative battery detection values of the same battery to be tested, thereby improving the flexibility of battery state of health evaluation and further improving the use feeling of a vehicle owner.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the embodiments of the present application, and are not limited thereto; although the application 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 application.
Claims (9)
1. A battery state of health assessment system, the system comprising:
The control module is used for controlling the charging equipment to execute charging operation for a battery to be tested at least twice, and in each charging operation, the control module is used for controlling the charging equipment to switch the charging current of the battery to be tested by utilizing the first current parameter and the second current parameter when detecting that the current state of the battery to be tested meets the state of charge parameter to be tested according to a preset state of charge parameter to be tested, a first current parameter and a second current parameter, and acquiring a voltage value of the battery to be tested corresponding to the charging operation, wherein the second current parameter is smaller than the first current parameter and the second current parameter is not smaller than 0 ampere;
the calculation module is used for calculating each relative battery detection value of the battery to be detected corresponding to each charging operation according to each voltage value, the first current parameter and the second current parameter of the battery to be detected corresponding to each charging operation and a preset conversion rule;
The evaluation module is used for obtaining a battery health state evaluation result of the battery to be tested according to each relative battery detection value of the battery to be tested, wherein when the difference value of each relative battery detection value is smaller, a better battery health state evaluation result is obtained;
The voltage value of the battery to be tested corresponding to the charging operation comprises a first voltage value and a second voltage value, and the preset conversion rule is as follows: The y is the relative battery detection value, the M is the first voltage value, the N is the second voltage value, the A is the first current parameter, and the B is the second current parameter.
2. The battery state of health evaluation system of claim 1, wherein the control module, the calculation module, and the evaluation module are all disposed on the charging device.
3. The battery state of health assessment system of claim 1, wherein the charging device is further communicatively connected to a cloud server; wherein,
The control module is arranged on the charging equipment, and the calculation module and the evaluation module are arranged on the cloud server; or alternatively
The control module and the calculation module are arranged on the charging equipment, and the evaluation module is arranged on the cloud server;
The charging operation of at least two times of the same battery to be tested is executed by the same charging equipment or different charging equipment.
4. The battery state of health assessment system of claim 3, wherein said control module further comprises:
And acquiring battery identification information of the battery to be tested, and transmitting the battery identification information to the cloud server by the charging equipment so that the evaluation module integrates at least two opposite battery detection values of the same battery to be tested according to the battery identification information, thereby acquiring the battery health state evaluation result of the battery to be tested.
5. The battery state of health assessment system of claim 1, wherein the control module further comprises:
Controlling the charging equipment to execute the charging operation on the battery to be tested by using the first current parameter, and controlling the charging equipment to start switching the charging current from the first current parameter to the second current parameter when detecting that the current state of charge of the battery to be tested meets the state of charge parameter to be tested, and obtaining a first voltage value corresponding to a first switching time of the battery to be tested from the first current parameter to the second current parameter;
When the actual charging time of the second current parameter meets the preset current switching duration, controlling the charging equipment to start switching the charging current from the second current parameter to the first current parameter, and obtaining a second voltage value of a second switching time of the battery to be tested from the second current parameter to the first current parameter.
6. The battery state of health evaluation system of claim 5, wherein the preset current switching duration is not less than 1 second and not more than 3 hours.
7. The battery state of health assessment system of claim 5, wherein the control module further comprises:
Collecting each voltage value of the battery to be tested corresponding to each time frame according to a preset interval time; wherein,
The time frame corresponding to the first switching time is a frame before the time frame when the battery to be tested starts to be switched from the first current parameter to the second current parameter;
The time frame corresponding to the second switching time is a frame before the time frame when the battery to be tested starts to switch from the second current parameter to the first current parameter.
8. The battery state of health evaluation system of claim 1, wherein the state of charge to be measured parameter comprises at least one state of charge to be measured sub-parameter, the control module further comprising:
and setting each first current parameter and each second current parameter corresponding to each state-of-charge sub-parameter to be measured.
9. The battery state of health assessment system of claim 1, wherein the charging device is disposed in a charging post or a battery exchange station.
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US7928735B2 (en) * | 2007-07-23 | 2011-04-19 | Yung-Sheng Huang | Battery performance monitor |
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