CN112505567A - Battery state of health evaluation system - Google Patents
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- CN112505567A CN112505567A CN202011199849.8A CN202011199849A CN112505567A CN 112505567 A CN112505567 A CN 112505567A CN 202011199849 A CN202011199849 A CN 202011199849A CN 112505567 A CN112505567 A CN 112505567A
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- 238000004364 calculation method Methods 0.000 claims abstract description 18
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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
Abstract
The application provides a battery health state evaluation system, which mainly comprises a control module, a charging device and a charging module, wherein the control module controls the charging device to execute charging operation at least twice aiming at a battery to be tested, and in each charging operation, according to preset charge state parameters to be tested, a first current parameter and a second current parameter, when the current charge state of the battery to be tested meets the charge state parameters to be tested, the charging device is controlled to switch the charging current of the battery to be tested by using the first current parameter and the second current parameter, so as to obtain 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, and then the evaluation module can obtain the battery health state evaluation result of the battery to be tested according to each relative battery detection value. Therefore, the evaluation of the health state of the battery can be completed in the charging process of the battery to be tested, so that the operation flow of the battery health evaluation is simplified.
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 keeping quantity of electric automobiles is continuously increased, and the cost of a power battery as an important component in a three-electrical system of the electric automobile is about one third of that of the whole automobile. The health degree of the power battery directly determines the performance and the residual value of the vehicle, and is a key factor influencing the user experience of the electric vehicle.
However, currently, the health status of the power battery is mainly detected by professional battery testing equipment, which collects key parameters such as the capacity and impedance of the battery during the charging and discharging process of 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 is difficult to be applied in a large scale.
In view of the above, the development of a power battery health degree detection technology with high efficiency and low cost has important significance and value.
Disclosure of Invention
In view of the above, the present application provides a battery state of health assessment system that may overcome or at least partially address the above-mentioned problems.
A first aspect of the present application provides a battery state of health assessment system, comprising: the control module controls the charging equipment to execute at least two charging operations for a battery to be tested, and in each charging operation, the control module controls the charging equipment to switch the charging current of the battery to be tested by using the first current parameter and the second current parameter according to a preset state of charge parameter to be tested, a first current parameter and a 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 obtains a voltage value of the battery to be tested, which corresponds to the charging operation; 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 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 disposed in the charging device.
Optionally, the charging device is further 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; wherein the charging operation of the same battery to be tested is performed by the same charging device or different charging devices.
Optionally, the control module further obtains battery identification information of the battery to be tested, and transmits the battery identification information to the cloud server by means of the charging device, so that the evaluation module integrates at least two relative battery detection values of the same battery to be tested according to the battery identification information, thereby obtaining the battery health status 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 when the current state of charge of the battery to be tested is detected to meet the state of charge parameter to be tested, controlling the charging equipment to start switching the charging current from the first current parameter to the second current parameter, and obtaining a first voltage value corresponding to first switching time for starting switching the battery 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 a preset current switching duration, controlling the charging equipment to switch the charging current from the second current parameter to the first current parameter, and obtaining a second voltage value of the battery to be tested at a second switching time when the battery to be tested is switched from the second current parameter to the first current parameter.
Optionally, the preset current switching time period 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 preset interval time; the time frame corresponding to the first switching time is a frame before the time frame in which the battery to be tested starts to switch 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 in which the battery to be tested starts to switch from the second current parameter to the first current parameter.
Optionally, the calculating module further obtains 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; m is the first voltage value, N is the second voltage value, and A is the first current parameter; and B is the second current parameter.
Optionally, the evaluation module obtains an evaluation result that the state of health of the battery is better 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 parameters to be measured include at least one state of charge sub-parameter to be measured, and the control module further includes a setting unit configured to set each of the first current parameters and each of the second current parameters corresponding to each of the state of charge sub-parameters to be measured.
Optionally, the charging device is arranged in the charging pile or the charging station.
It can be seen from the above technical solutions that, in the battery health status evaluation system provided in the embodiment of the present application, the charging operation is performed at least twice for the battery to be tested, and the charging current of the battery to be tested is changed in each charging operation process, so as to obtain each relative battery detection value of the battery to be tested corresponding to each charging operation, and obtain the health status evaluation result of the battery to be tested according to each relative battery detection value of the battery to be tested corresponding to each charging operation.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the drawings:
fig. 1 to 4 are schematic diagrams illustrating a battery health status evaluation system according to various embodiments of the present disclosure.
Element number
100: a battery state of health assessment system; 101: a control module; 102: a calculation module; 103: an evaluation module; 2. 2a to 2 n: a charging device; 3: a cloud server; 4: and (5) a battery to be tested.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.
The following further describes a specific implementation of the embodiments of the present application with reference to the drawings of the embodiments of the present application.
The battery health state evaluation system 100 is suitable for evaluating the health state of a rechargeable battery (i.e., a battery to be tested) of a new energy vehicle, and performs at least two charging operations on the battery to be tested by controlling a charging device to obtain each relative battery detection value corresponding to each charging operation of the battery to be tested, and accordingly evaluates the health state of the battery to be tested.
As shown in fig. 1, the battery health status evaluation system 100 of the present embodiment may be integrally configured in the charging device 2, and mainly includes a control module 101, a calculation module 102, and an evaluation module 103.
In this embodiment, the charging device 2 may be disposed in a charging pile or a charging station for providing charging work 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 the charging current of the battery 4 to be tested by using the first current parameter and the second current parameter according to a preset state of charge parameter to be tested, the first current parameter, and the second current parameter when detecting that the current state of charge of the battery 4 to be tested satisfies 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-tested state of charge parameter, a first current parameter, and a second current parameter for setting the to-be-tested battery 4, so as to control the charging device 2 to perform a corresponding charging operation on the to-be-tested battery 4.
In this embodiment, the state of charge parameter (SOC) of the battery under test is any value between 0% and 100%, for example, 25% SOC, 50% SOC, 75% SOC, etc.
In the embodiment, the second current parameter (e.g. current B) is smaller than the first current parameter (current A) by not less than 0A, i.e. 0 ≦ B < A.
Optionally, the state of charge parameter to be measured may include one or more state of charge sub-parameters to be measured.
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 and 50% of the state of charge to be measured), and set 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, each of the first current parameter and the second current parameter corresponding to each of the different state of charge sub-parameters to be tested may be the same or different, depending on the actual test requirements, which is not limited in this application.
For example, the first current parameter and the second current parameter corresponding to the first state of charge sub-parameter SOC1 to be measured (e.g. 25% state of charge) may be set as a1 and B1, respectively, and the first current parameter and the second current parameter corresponding to the second state of charge sub-parameter SOC2 to be measured (e.g. 50% state of charge) may be set as a2 and B2, respectively, where a1 and a2 may be equal or unequal, and similarly, B1 and B2 may also be equal or unequal.
In this embodiment, the state of charge parameter to be measured, the first current parameter, and the second current parameter, which are based on each charging operation performed on the battery to be measured, need to be the same.
For example, if the state of charge parameter to be measured, the first current parameter and the second current parameter performed by the first charging operation performed on the battery to be measured are SOC1, a1 and B1, respectively, the state of charge parameter to be measured, the first current parameter and the second current parameter performed by the second charging operation performed on the battery to be measured 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 a charging operation on the battery 4 to be tested by using a first current parameter (e.g., a ampere), and when detecting that the current state of charge of the battery 4 to be tested satisfies a state of charge parameter to be tested (e.g., a state of charge of 25%), control the charging device 2 to start switching the charging current from the first current parameter (e.g., a ampere) to a second current parameter (e.g., B ampere), and obtain a first voltage value (e.g., M volts) corresponding to a first switching time at which the battery 2 to be tested starts switching 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 time length, the charging device 2 is controlled to start switching 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 during which the battery 4 to be tested starts switching 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 tested from the first current parameter to the second current parameter is equivalent to standing the battery 4 to be tested at the charging current of 0 ampere.
Optionally, the preset current switching time period 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 tested corresponding to each time frame according to the preset interval time.
Alternatively, the set time interval frame is, for example, 1 second/frame (i.e., the voltage value is collected every 1 second), but not limited thereto, and may also be set to 0.5 second/frame (i.e., the voltage value is collected every 0.5 seconds) or 2 seconds/frame (i.e., the voltage value is collected every 2 seconds) according to the actual requirement.
In the embodiment, the specific setting of the interval time frame is not limited in the present application, 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 apparatus.
Optionally, the first switching time corresponds to a time frame before the time frame of the battery 4 to be tested starting to switch from the first current parameter to the second current parameter, and the second switching time corresponds to a time frame before the time frame of the battery 4 to be tested starting to switch from the second current parameter to the first current parameter.
For example, in the case that the interval time frame is set to 1 second/frame (i.e., the voltage value is collected every 1 second), when the charging current of the battery under test starts to switch from the first current parameter to the second current parameter or from the second current parameter to the first current parameter at 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.
As another example, in the case that the interval time frame is set to 2 seconds/frame (i.e. the voltage value is collected every 2 seconds), when the charging current of the battery to be tested starts to switch from the first current parameter to the second current parameter or from the second current parameter to the first current parameter at the time frame corresponding to 5 seconds, the first switching time or the second switching time is the time frame corresponding to 3 seconds.
The calculating module 102 is configured to calculate, according to each voltage value, the first current parameter, and the second current parameter of the battery 4 to be tested corresponding to each charging operation, each corresponding battery detection value of the battery 4 to be tested corresponding to each charging operation.
In this embodiment, the calculating 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; and 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 may obtain a better evaluation result of the battery health state according to the relative battery detection values of the battery 4 to be tested when the difference between the relative battery detection values is smaller, that is, the battery health (SOH) of the battery to be tested is represented as being better when the relative battery detection values of the battery 4 to be tested corresponding to the charging operations are closer.
Optionally, the battery health state evaluation system 100 of this embodiment may further perform detection on parameters such as a highest voltage value, a lowest voltage value, a total voltage value, and an average voltage value of the battery 4 to be tested, and voltage values of single cells of each cell in the battery 4 to be tested, so as to more accurately evaluate the health degree of the battery 4 to be tested.
To sum up, the battery health status evaluation system according to the embodiment of the present application changes the charging current of the battery to be tested in the charging operation process performed at least twice for the battery to be tested, so as to obtain the voltage value of the battery to be tested when the charging current changes, thereby obtaining the relative battery detection value of the battery to be tested, and obtaining the health detection result of the battery to be tested according to each relative battery detection value of the battery to be tested corresponding to each charging operation.
Therefore, the health degree detection operation of the battery can be completed in the battery charging process, the battery detection time can be saved, the battery detection operation is simplified, the battery detection experience of a vehicle owner is improved, independent battery detection equipment does not need to be configured, and the battery detection cost is reduced.
Referring to fig. 2, a diagram of a battery state of health assessment system 100 according to another embodiment of the present application is shown.
In the 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 health status 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 basically the same as those of the embodiment shown in fig. 1, and only the differences will be described below.
In this embodiment, the control module 101 is further configured to obtain battery identification information of the battery 4 to be tested, and transmit the battery identification information to the cloud server 3 via 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 a 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 calculation 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 of a further embodiment of the present application is shown. In the embodiment, the control module 101 of the battery health status 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 voltage values of the battery 4 to be tested corresponding to the charging operations, upload, by the charging device 2, 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 voltage values of the battery 4 to be tested corresponding to the charging operations to the cloud server 3, so that the calculation module 102 calculates respective corresponding battery detection values of the battery 4 to be tested corresponding to the charging operations according to the voltage values, the first current parameter, and the second current parameter of the battery 4 to be tested corresponding to the charging operations, and then provides the evaluation module 103 to classify the respective corresponding battery detection values according to the battery identification information to integrate the respective corresponding battery detection values of the same battery 4 to be tested, thereby evaluating the state of health of each battery 4 to be tested.
It should be noted that, in the embodiments shown in fig. 2 and fig. 3, at least two charging operations performed on the same battery 2 to be tested may be performed 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 that the flexibility of the battery health status evaluation operation may be further improved, and the use experience of the vehicle owner may be improved.
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, so that the battery detection time can be saved, and the battery detection flow can be simplified. In addition, a battery detection system does not need to be additionally arranged, and the battery detection cost can be reduced.
In addition, the battery health state evaluation system analyzes the change trend of the battery health State (SOH) by establishing each relative battery detection value of the battery to be detected in each charging operation, and can improve the objectivity of the health degree detection result of the battery to be detected.
In addition, this application provides and can provide the battery that awaits measuring through battery health status evaluation system and can carry out the operation of charging at different battery charging outfit, utilizes battery charging outfit to upload the voltage value or the relative battery detected value of the battery that awaits measuring corresponding to each operation of charging to the high in the clouds server to supply the high in the clouds server to obtain the battery health status evaluation result of the battery that awaits measuring through integrating each relative battery detected value of the same battery that awaits measuring, borrow this, can improve the flexibility of battery health status evaluation, in order to further promote the use impression of car owner.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A battery state of health assessment system, the system comprising:
the control module controls the charging equipment to execute at least two charging operations for a battery to be tested, and in each charging operation, the control module controls the charging equipment to switch the charging current of the battery to be tested by using the first current parameter and the second current parameter according to a preset state of charge parameter to be tested, a first current parameter and a 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 obtains a voltage value of the battery to be tested, which corresponds to the charging operation;
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
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.
2. The battery state of health assessment system of claim 1, wherein said control module, said calculation module, said assessment module are disposed on said charging device.
3. The battery state of health assessment system of claim 1, wherein said charging device is further communicatively connected to a cloud server; wherein the content of the first and second substances,
the control module is arranged on the charging equipment, and the calculation module and the evaluation module are arranged on the cloud server; alternatively, the first and second electrodes may be,
the control module and the calculation module are arranged on the charging equipment, and the evaluation module is arranged on the cloud server;
wherein the charging operation of the same battery to be tested is performed by the same charging device or different charging devices.
4. The battery state of health evaluation system of claim 3,
the control module further obtains battery identification information of the battery to be tested, and transmits the battery identification information to the cloud server by means of the charging equipment, so that the evaluation module integrates at least two relative battery detection values of the same battery to be tested according to the battery identification information, and accordingly the battery health state evaluation result of the battery to be tested is obtained.
5. The battery state of health assessment system of claim 1, wherein the second current parameter is less than the first current parameter and the second current parameter is not less than 0 amps.
6. The battery state of health assessment system of claim 1, wherein said voltage values of said battery under test corresponding to said charging operation comprise a first voltage value and a second voltage value, said control module comprising:
controlling the charging equipment to execute the charging operation on the battery to be tested by using the first current parameter, and when the current state of charge of the battery to be tested is detected to meet the state of charge parameter to be tested, controlling the charging equipment to start switching the charging current from the first current parameter to the second current parameter, and obtaining a first voltage value corresponding to first switching time for starting switching the battery 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 a preset current switching duration, controlling the charging equipment to switch the charging current from the second current parameter to the first current parameter, and obtaining a second voltage value of the battery to be tested at a second switching time when the battery to be tested is switched from the second current parameter to the first current parameter.
7. The battery state of health assessment system of claim 6, wherein the preset current switching duration is no less than 1 second and no more than 3 hours.
8. The battery state of health assessment system of claim 6, wherein said control module further comprises:
collecting each voltage value of the battery to be tested corresponding to each time frame according to preset interval time; wherein the content of the first and second substances,
the time frame corresponding to the first switching time is a frame before the time frame in which the battery to be tested starts to switch 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 in which the battery to be tested starts to switch from the second current parameter to the first current parameter.
9. The battery state of health assessment system of claim 6, wherein said calculation module further comprises:
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; m is the first voltage value, N is the second voltage value, and A is the first current parameter; and B is the second current parameter.
10. The battery state of health assessment system of claim 1, wherein said assessment module comprises:
according to the relative battery detection values of the battery to be detected, when the difference value of the relative battery detection values is smaller, the better evaluation result of the battery health state is obtained.
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