CN113517736A - Battery pack maintenance method - Google Patents
Battery pack maintenance method Download PDFInfo
- Publication number
- CN113517736A CN113517736A CN202110602905.6A CN202110602905A CN113517736A CN 113517736 A CN113517736 A CN 113517736A CN 202110602905 A CN202110602905 A CN 202110602905A CN 113517736 A CN113517736 A CN 113517736A
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- China
- Prior art keywords
- voltage
- state
- battery pack
- battery
- health
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/005—Detection of state of health [SOH]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
- H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery pack maintenance method, which comprises the following steps: detecting the connection state of the battery pack and the charger, judging that the battery pack is in a first state or a second state, and setting a first parameter according to a judgment result; measuring the voltage of a single battery in the battery pack; judging the voltage of the single battery in the battery pack, taking the maximum single battery voltage as a first voltage, and taking the minimum single battery voltage as a second voltage; searching a battery health state table according to the first parameter, the first voltage and the second voltage, and outputting the health parameter and the current state of the battery pack; and when the health parameter is lower than a threshold value, maintaining the battery pack. The invention has the beneficial effects that: through setting, detect the voltage of battery cell in the group battery and assess the scope that voltage is located, give the health parameter in order to indicate maintainer directly perceivedly to in time give an alarm when the voltage of battery cell in the group battery exceedes the allowed range, be convenient for in time maintain, promoted the holistic usability of group battery.
Description
Technical Field
The invention relates to the technical field of battery maintenance, in particular to a battery pack maintenance method.
Background
In the field of rail transit, backup power batteries are used in a large number of existing products as important emergency energy sources. Therefore, in order to improve the reliability of the battery pack as a backup power source, it is necessary to effectively monitor the real-time health status of the battery pack and perform maintenance work in time when the health status of the battery pack is not good, so as to improve the reliability of the battery pack
Disclosure of Invention
In view of the above problems in the prior art, a battery pack maintenance method is provided.
The specific technical scheme is as follows:
a battery pack maintenance method, comprising: the detection system detects the connection state of the battery pack and the charger, judges whether the battery pack is in a first state or a second state, and sets a first parameter according to the judgment result; the detection system measures the voltage of the single battery in the battery pack; the detection system judges the voltage of the single battery in the battery pack, takes the maximum voltage of the single battery as a first voltage, and takes the minimum voltage of the single battery as a second voltage; the detection system searches a battery health state table stored in the detection system according to the first parameter, the first voltage and the second voltage, and outputs the health parameter and the current state of the battery pack; and when the health parameter is lower than a threshold value, maintaining the battery pack.
Preferably, the detection system further determines a third state according to the maximum cell voltage and the connection state, and outputs the third state as the current state; and the third state is a state that the charger regulates the voltage of the single battery after the battery pack is charged.
Preferably, the battery state of health table corresponds to a plurality of value ranges of the second voltage, and the value ranges correspond to a plurality of the health parameters.
Preferably, in the battery state of health table, the value ranges of the second voltages corresponding to the first state and the second state are different.
Preferably, the first voltage is used for judging whether the battery pack normally operates in the first state or the second state.
Preferably, a first voltage range in which the battery pack normally operates in the first state is higher than a first voltage range in which the battery pack normally operates in the second state.
Preferably, the detection system outputs a fault signal when the first voltage is less than 3.35V.
Preferably, the value ranges of the plurality of second voltages are arranged from high to low, and respectively correspond to the health parameters with a plurality of decreasing values.
The technical scheme has the following advantages or beneficial effects: through setting up detecting system, detect the voltage of battery cell in the group battery and assess the scope that voltage is located, give the health parameter in order to indicate maintainer directly perceivedly to in time give an alarm when the voltage of battery cell in the group battery exceedes the permission scope, be convenient for in time maintain, promoted the holistic usability of group battery.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.
FIG. 1 is a schematic flow chart of an embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The invention includes a battery pack maintenance method comprising: the detection system detects the connection state of the battery pack and the charger, judges whether the battery pack is in a first state or a second state, and sets a first parameter according to the judgment result; the detection system measures the voltage of the single battery in the battery pack; the detection system judges the voltage of the single battery in the battery pack, takes the maximum voltage of the single battery as a first voltage, and takes the minimum voltage of the single battery as a second voltage; the detection system searches a battery health state table stored in the detection system according to the first parameter, the first voltage and the second voltage, and outputs the health parameter and the current state of the battery pack; and when the health parameter is lower than a threshold value, maintaining the battery pack.
Specifically, the battery pack is normally engaged with the charger in a normal operating state and operates in a floating charge state, i.e., a first state; in some cases, the battery pack is disconnected from the charger and operates in an open state with no current input and output, i.e., a second state. Therefore, the current operating state of the battery pack can be generally determined by determining whether the dry contact between the battery pack and the charger is engaged.
In a preferred embodiment, the first voltage is used to determine whether the battery pack normally operates in the first state or the second state, and when the battery pack operates in different states, the corresponding voltages are different, and the maximum cell voltage in the float charging state is generally higher than the maximum cell voltage in the open circuit state.
In one embodiment, as shown in table 1, when the battery pack operates in the floating charge state, the maximum cell voltage is usually 3.47V to 3.51V, and when the battery pack operates in the open circuit state, the maximum cell voltage is usually 3.35V to 3.45V, whether the battery pack, the detection system, and the charging machine operate in the normal operating state can be effectively determined by determining whether the maximum cell voltage is within the above value range, and when the maximum cell voltage deviates from the corresponding value range, the detection system alarms to remind the maintenance personnel to detect the operating states of the battery pack, the charging machine, and the detection system and timely maintain the corresponding faulty device, thereby improving the availability of the whole system.
| Battery pack state | Maximum cell voltage | Judging method |
| Floating charger | 3.47<Vmax≤3.51 | Charger joint |
| Open circuit | 3.35≤Vmax≤3.45 | Disconnection of charger |
TABLE 1
In a preferred embodiment, the detection system further determines a third state according to the maximum cell voltage and the connection state, and outputs the third state as the current state; and the third state is the state that the charger regulates the voltage of the single battery after the charging of the battery pack is finished.
Specifically, the working state of the battery pack specifically comprises a charging state, a voltage regulation state, a working state and an open circuit state, wherein the charging state refers to a state when the average voltage of the battery pack is lower than a threshold value, at the moment, the battery pack is connected with a charger and is charged, when the average voltage of the battery pack reaches the threshold value, the charging is finished, the battery pack enters the voltage regulation state, the charger charges the single batteries with lower voltage and discharges the single batteries with overhigh voltage to improve the overall consistency of the battery pack, and further the overall voltage of the battery pack is in a more consistent voltage range, so that the safety and the reliability of the battery pack are improved. When the voltage of the battery pack is adjusted, the battery pack can be kept in a working state, namely a floating charging state, and the battery pack is connected with the charger and kept in the floating charging state for a long time by the charger, so that the overall voltage of the battery pack is relatively consistent. In the voltage regulation state, because there are two regulation modes of charging the single battery with lower voltage and discharging the single battery with higher voltage, the measured voltage of the single battery needs to be set to two ranges, the first voltage is greater than 3.51V, or the first voltage is between 3.45V and 3.47V.
In a preferred embodiment, as shown in table 2, the battery health state table corresponds to a plurality of value ranges of the second voltage, the value ranges correspond to a plurality of health parameters, and the value ranges of the second voltage corresponding to the first state and the second state are different.
TABLE 2
In a preferred embodiment, the first voltage range in which the battery pack normally operates in the first state is higher than the first voltage range in which the battery pack normally operates in the second state.
Specifically, when the charger is combined with the battery pack, the battery pack operates in the first state, and the charger charges the battery pack in a floating manner with a small current, so that the first voltage range of the battery pack in the normal operation in the first state is generally higher than the first voltage range of the battery pack in the second state. By comparing the first voltage range of the battery pack with the working state of the battery pack, whether the battery pack and the charger are in a normal working state or not can be effectively judged.
In a preferred embodiment, the detection system outputs a fault signal when the first voltage is less than 3.35V.
In a preferred embodiment, the value ranges of the plurality of second voltages are arranged from high to low, and respectively correspond to the plurality of health parameters with decreasing values.
In a preferred embodiment, the working state of the battery pack can be visually represented by setting the health parameters with decreasing values, so that maintenance personnel can estimate the time required for maintenance of the battery pack according to the health parameters, and the working efficiency is improved.
In a preferred embodiment, the health parameter is set to a percentage value, as shown in table 2, indicating that the battery pack requires maintenance when the second voltage is detected to be less than 3.25V in the first state or less than 3.2V in the second state.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A battery pack maintenance method, comprising:
the detection system detects the connection state of the battery pack and the charger, judges whether the battery pack is in a first state or a second state, and sets a first parameter according to the judgment result;
the detection system measures the voltage of the single battery in the battery pack;
the detection system compares the voltage of the single batteries in the battery pack, takes the maximum voltage of the single batteries as a first voltage, and takes the minimum voltage of the single batteries as a second voltage;
the detection system searches a battery health state table stored in the detection system according to the first parameter, the first voltage and the second voltage, and outputs the health parameter and the current state of the battery pack;
and when the health parameter is lower than a threshold value, maintaining the battery pack.
2. The maintenance method according to claim 1, wherein the detection system further determines that a third state exists according to the maximum cell voltage and the connection state, and outputs the third state as the current state;
and the third state is a state that the charger regulates the voltage of the single battery after the battery pack is charged.
3. The maintenance method according to claim 1, wherein the battery state of health table corresponds to a plurality of value ranges of the second voltage, and the plurality of value ranges correspond to a plurality of the health parameters.
4. The maintenance method according to claim 3, wherein a value range of the second voltage corresponding to the first state and the second state is different in the battery state of health table.
5. The maintenance method according to claim 3, wherein the first voltage is used to determine whether the battery pack is operating normally in the first state or the second state.
6. The maintenance method according to claim 5, wherein a first voltage range in which the battery pack normally operates in the first state is higher than a first voltage range in which the battery pack normally operates in the second state.
7. The maintenance method according to claim 1, wherein the detection system outputs a fault signal when the first voltage is less than 3.35V.
8. The maintenance method according to claim 3, wherein the value ranges of the second voltages are arranged from high to low, and respectively correspond to the health parameters with decreasing values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110602905.6A CN113517736B (en) | 2021-05-31 | 2021-05-31 | Battery pack maintenance method |
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|---|---|---|---|
| CN202110602905.6A CN113517736B (en) | 2021-05-31 | 2021-05-31 | Battery pack maintenance method |
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| CN113517736A true CN113517736A (en) | 2021-10-19 |
| CN113517736B CN113517736B (en) | 2023-04-07 |
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| DE102013010311A1 (en) * | 2013-06-19 | 2014-12-24 | Daimler Ag | Method for determining the state of individual battery cells of a high-voltage battery and system therefor |
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| WO2018235995A1 (en) * | 2017-06-23 | 2018-12-27 | 이정환 | Method for fast charging and maximum discharging while reducing degradation of electric vehicle battery, and apparatus therefor |
| US20200326379A1 (en) * | 2019-04-11 | 2020-10-15 | Dongguan Amperex Technology Limited | Electronic device and method for detecting the state of health of a battery |
| CN213262026U (en) * | 2020-10-26 | 2021-05-25 | 湖南润物智联新能源科技有限公司 | Power battery pack voltage monitoring circuit and electric vehicle |
-
2021
- 2021-05-31 CN CN202110602905.6A patent/CN113517736B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2091502A (en) * | 1981-01-15 | 1982-07-28 | Esquire Inc | A battery charger |
| US5015152A (en) * | 1989-11-20 | 1991-05-14 | The Marley Company | Battery monitoring and charging circuit for sump pumps |
| JP2000134805A (en) * | 1998-10-22 | 2000-05-12 | Denso Corp | Battery assembly charge/discharge state deciding method and battery assembly charge/discharge state deciding device |
| JP2002369400A (en) * | 2001-06-11 | 2002-12-20 | Yazaki Corp | Device and method for adjusting charged state of battery pack |
| US20090248334A1 (en) * | 2008-03-27 | 2009-10-01 | Continental Automotive France | Method for estimating the charge of a motor vehicle battery |
| EP2439551A1 (en) * | 2010-10-05 | 2012-04-11 | IPS Integrated Power Solutions AG | Method of determining battery status information |
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| CN113517736B (en) | 2023-04-07 |
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