CN111983481A - Lithium battery overdischarge testing method - Google Patents
Lithium battery overdischarge testing method Download PDFInfo
- Publication number
- CN111983481A CN111983481A CN201910438908.3A CN201910438908A CN111983481A CN 111983481 A CN111983481 A CN 111983481A CN 201910438908 A CN201910438908 A CN 201910438908A CN 111983481 A CN111983481 A CN 111983481A
- Authority
- CN
- China
- Prior art keywords
- battery
- current
- charging
- voltage
- constant
- Prior art date
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The application discloses a lithium battery overdischarge testing method which is characterized by comprising the following steps of: connecting a first battery and a second battery in series to form a series battery pack; with a current I1Respectively constant-current charging the first battery and the second battery to the charging termination voltage, I1Discharging current for the first battery at a rate of 1 hour, and then constant-voltage charging the first battery and the second battery at a charge termination voltage, respectively, wherein in the constant-voltage charging, when the charging current is reduced to 0.05I1Stopping charging and laying aside for a period of time t1(ii) a Applying a current I to the first battery1Discharging at constant current for 60min, and applying current I to series battery pack composed of first battery and second battery1Discharging at constant current for 30min, and detecting the voltage and temperature of the first battery in real time in the discharging process. The test method is simple to operate and low in cost, and can meet the test requirement on the battery for continuous discharge for 90 min.
Description
Technical Field
The application relates to a lithium battery overdischarge testing method.
Background
In the past, the overdischarge testing method for the lithium battery comprises the following two steps:
1) The tested battery is 1I1When the current constant current charging is carried out to the charging termination voltage specified in the enterprise technical conditions, the constant voltage charging is carried out until the charging current is reduced to 0.05I1Stopping charging, and standing for 1 hour after charging;
2) the battery is charged at 1I1The current was discharged for 90 min.
However, the discharge lower limit voltage of the existing single lithium battery charging and discharging equipment is 0V, and for the lithium battery overdischarge test, the following three problems exist:
1. when the lithium battery overdischarge test is performed, the test is terminated because the voltage reaches 0V when the battery is discharged for 90 min.
2. The voltage of the lithium battery can only be put to 0V at the lowest without the negative pressure
3. Although the existing test equipment can be modified to make the discharge voltage form negative voltage, the input cost is very large.
Disclosure of Invention
The purpose of the application is: aiming at the problems, the overdischarge testing method of the lithium battery, which is simple to operate and low in cost, is provided, and can meet the testing requirement of the battery on the continuous discharge for 90 min.
The technical scheme of the application is as follows:
a lithium battery overdischarge testing method is characterized by comprising the following steps:
s1: the first battery and the second battery are connected in series to form a series battery pack;
S2: with a current I1Respectively carrying out constant current charging on the first battery and the second battery to the charging termination voltage of the batteries, I1Discharging current for the first battery at a rate of 1 hour, and then performing constant voltage charging on the first battery and the second battery respectively at the charging termination voltage, wherein in the constant voltage charging process, when the charging current is reduced to 0.05I1When the charging is stopped,is set aside for a period of time t1；
S3: applying a current I to the first battery1Discharging for 60min at constant current, and applying current I to series battery pack formed by the first battery and the second battery1Discharging for 30min at constant current, and detecting the voltage and the temperature of the first battery in real time in the discharging process.
On the basis of the technical scheme, the application also comprises the following preferable scheme:
and t1 is 10-60 min.
The t1 is 60 min.
The 1-hour rate discharge current of the second battery is also I1。
The first battery and the second battery are batteries of the same type.
In step S3, a current I is applied to the series battery pack including the first battery and the second battery1And in the process of constant-current discharging for 30min, detecting the voltage and the temperature of the second battery in real time.
The application has the advantages that: according to the overdischarge test method for the lithium battery, on one hand, the requirement of continuous discharge for 90min can be met, and the battery can not be cut off when the voltage of the battery reaches 0V; on the other hand, the negative pressure condition of the battery to be tested can be caused, so that the test is more severe. By the testing method, testing requirements can be met without increasing any cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a series connection of a first battery and a second battery in an embodiment of the present application, in which a thick wire is a charging/discharging wire;
wherein: 1-a first battery, 2-a second battery.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. The present application may be embodied in many different forms and is not limited to the embodiments described in the present embodiment. The following detailed description is provided to facilitate a more thorough understanding of the present disclosure, and the words used to indicate orientation, top, bottom, left, right, etc. are used solely to describe the illustrated structure in connection with the accompanying figures.
One skilled in the relevant art will recognize, however, that one or more of the specific details can be omitted, or other methods, components, or materials can be used. In some instances, some embodiments are not described or not described in detail.
Furthermore, the technical features, aspects or characteristics described herein may be combined in any suitable manner in one or more embodiments. It will be readily appreciated by those of skill in the art that the order of the steps or operations of the methods associated with the embodiments provided herein may be varied. Thus, any sequence in the figures and examples is for illustrative purposes only and does not imply a requirement in a certain order unless explicitly stated to require a certain order.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
Referring to fig. 1, the over-discharge testing method for a lithium battery of the present embodiment includes the following steps:
S1: two batteries are connected in series to form a series battery pack consisting of the two batteries. For convenience of description of the solution of the present embodiment, the two batteries are respectively referred to as a first battery 1 and a second battery 2, and the present embodiment specifically performs an overdischarge test on the first battery 1.
The first battery 1 and the second battery 2 are cylindrical lithium batteries of INR18650 type, the rated voltage is 3.6V, the rated capacity is 2.6Ah, and the operating voltage range is 2.75V-4.2V, wherein 4.2V is the charging termination voltage of the two batteries, and when the batteries are charged to 4.2V, the batteries are considered to be fully charged. The 1-hour discharge rate current of the battery was 2.6Ah/h 2.6A.
S2: the first battery 1 and the second battery 2 are respectively charged with a constant current of 2.6A to 4.2V, and when the batteries are charged to a voltage of 4.2V, the first battery 1 and the second battery 2 are respectively charged with a constant voltage of 4.2V, namely, the constant current is charged to 4.2V, and then the constant voltage is charged. In the process of the constant voltage charging, the charging was stopped when the charging current was reduced to 0.13A, and left for 1 h. The above-mentioned standing time can be set according to the requirements, generally it must not exceed 1h, not less than 10 min.
S3: and discharging the first battery 1 for 60min at a constant current of 2.6A, then discharging the whole series battery pack consisting of the two batteries for 30min at a constant current of 2.6A, and detecting the voltage and the temperature of the first battery 1 in real time in the two-stage discharging process, thus finishing the over-discharge test of the first battery for 90 min.
In the above step S3, the temperature and voltage of the second battery 2 during the second half 30min of discharge can also be monitored in real time.
The above embodiments are only for illustrating the technical concepts and features of the present application, and the purpose of the embodiments is to enable people to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the main technical scheme of the application are covered in the protection scope of the application.
Claims (6)
1. A lithium battery overdischarge testing method is characterized by comprising the following steps:
s1: the first battery (1) and the second battery (2) are connected in series to form a series battery pack;
s2: with a current I1Respectively constant-current charging the first battery (1) and the second battery (2) to a charging termination voltage of the batteries, I1Discharging the current for the first battery (1) at a rate of 1 hour, and then separately charging the first battery at the end-of-charge voltage(1) And the second battery (2) is charged at a constant voltage when the charging current is reduced to 0.05I during the constant voltage charging1Stopping charging and laying aside for a period of time t1；
S3: applying a current I to the first battery (1)1Discharging for 60min at constant current, and then applying current I to the series battery pack consisting of the first battery (1) and the second battery (2) 1Discharging for 30min at constant current, and detecting the voltage and the temperature of the first battery (1) in real time in the discharging process.
2. The overdischarge test method for a lithium battery as claimed in claim 1, wherein t1 is 10-60 min.
3. The lithium battery overdischarge test method according to claim 2, wherein the t1 is 60 min.
4. Overdischarge test method for lithium batteries according to claim 1, wherein the 1 hour rate discharge current of the second battery (2) is also I1。
5. The lithium battery overdischarge test method according to claim 4, wherein the first battery (1) and the second battery (2) are the same type of battery.
6. Overdischarge test method for lithium batteries according to claim 1, wherein in step S3, a current I is applied to the series battery comprising the first battery (1) and the second battery (2)1And in the process of constant-current discharge for 30min, detecting the voltage and the temperature of the second battery (2) in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910438908.3A CN111983481A (en) | 2019-05-24 | 2019-05-24 | Lithium battery overdischarge testing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910438908.3A CN111983481A (en) | 2019-05-24 | 2019-05-24 | Lithium battery overdischarge testing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111983481A true CN111983481A (en) | 2020-11-24 |
Family
ID=73436891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910438908.3A Withdrawn CN111983481A (en) | 2019-05-24 | 2019-05-24 | Lithium battery overdischarge testing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111983481A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557923A (en) * | 2020-12-01 | 2021-03-26 | 上海电器科学研究所（集团）有限公司 | Battery overdischarge test method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08213055A (en) * | 1995-02-08 | 1996-08-20 | Honda Motor Co Ltd | Charging method of battery pack and its device |
| CN101387689A (en) * | 2008-09-28 | 2009-03-18 | 广州丰江电池新技术有限公司 | Method for testing safety of lithium secondary battery by alkaline cell |
| CN102981122A (en) * | 2011-09-07 | 2013-03-20 | 杭州市电力局 | Method and system of electric automobile battery test |
| CN104979562A (en) * | 2015-06-02 | 2015-10-14 | 哈尔滨工业大学 | Lithium ion battery composite cathode with overdischarge energy to 0V and preparation method and application thereof |
| CN106646257A (en) * | 2016-12-22 | 2017-05-10 | 国联汽车动力电池研究院有限责任公司 | Testing platform and testing method for detecting thermal runaway diffusion of lithium ion battery |
| CN106842043A (en) * | 2016-12-28 | 2017-06-13 | 国联汽车动力电池研究院有限责任公司 | For the method for testing that lithium ion battery safe class is evaluated |
| CN107703454A (en) * | 2017-08-24 | 2018-02-16 | 超威电源有限公司 | A kind of power lead acid battery fast charging and discharging method of testing |
| CN108089133A (en) * | 2017-11-29 | 2018-05-29 | 深圳市科陆电子科技股份有限公司 | Energy-storage system consistency of battery pack detection method and detection device |
| CN109509927A (en) * | 2019-01-07 | 2019-03-22 | 东莞赣锋电子有限公司 | A kind of charging modes of lithium ion battery |
| CN112557923A (en) * | 2020-12-01 | 2021-03-26 | 上海电器科学研究所（集团）有限公司 | Battery overdischarge test method |
-
2019
- 2019-05-24 CN CN201910438908.3A patent/CN111983481A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08213055A (en) * | 1995-02-08 | 1996-08-20 | Honda Motor Co Ltd | Charging method of battery pack and its device |
| CN101387689A (en) * | 2008-09-28 | 2009-03-18 | 广州丰江电池新技术有限公司 | Method for testing safety of lithium secondary battery by alkaline cell |
| CN102981122A (en) * | 2011-09-07 | 2013-03-20 | 杭州市电力局 | Method and system of electric automobile battery test |
| CN104979562A (en) * | 2015-06-02 | 2015-10-14 | 哈尔滨工业大学 | Lithium ion battery composite cathode with overdischarge energy to 0V and preparation method and application thereof |
| CN106646257A (en) * | 2016-12-22 | 2017-05-10 | 国联汽车动力电池研究院有限责任公司 | Testing platform and testing method for detecting thermal runaway diffusion of lithium ion battery |
| CN106842043A (en) * | 2016-12-28 | 2017-06-13 | 国联汽车动力电池研究院有限责任公司 | For the method for testing that lithium ion battery safe class is evaluated |
| CN107703454A (en) * | 2017-08-24 | 2018-02-16 | 超威电源有限公司 | A kind of power lead acid battery fast charging and discharging method of testing |
| CN108089133A (en) * | 2017-11-29 | 2018-05-29 | 深圳市科陆电子科技股份有限公司 | Energy-storage system consistency of battery pack detection method and detection device |
| CN109509927A (en) * | 2019-01-07 | 2019-03-22 | 东莞赣锋电子有限公司 | A kind of charging modes of lithium ion battery |
| CN112557923A (en) * | 2020-12-01 | 2021-03-26 | 上海电器科学研究所（集团）有限公司 | Battery overdischarge test method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112557923A (en) * | 2020-12-01 | 2021-03-26 | 上海电器科学研究所（集团）有限公司 | Battery overdischarge test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104459558B (en) | Lithium ion battery screening technique | |
| CN104014491B (en) | A kind of screening technique of lithium ion battery in parallel | |
| WO2016123969A1 (en) | Storage battery device, and charging-discharging monitoring method, device and system thereof | |
| CN101826745B (en) | Lithium ion power battery lossless charger | |
| CN102916456B (en) | A kind of charging and discharging lithium battery management system and method | |
| CN107733007A (en) | A kind of direct equalizing circuit of battery pack Bi-objective and equalization methods | |
| CN109655753A (en) | A kind of evaluation method of battery pack SOC | |
| CN105471010A (en) | Voltage balancing method and system for super capacitor module | |
| CN116470603A (en) | Method for preventing circulation of battery clusters in parallel connection | |
| JP2019522866A (en) | Battery pack for starting | |
| WO2017152798A1 (en) | Method and device for controlling power supply of oil engine and battery | |
| CN105048571B (en) | A kind of circuit and its method for realizing multiple battery pack complete alternation discharge and recharges | |
| CN111983481A (en) | Lithium battery overdischarge testing method | |
| CN106828142B (en) | A kind of power battery active equalization method | |
| CN105048579B (en) | It is a kind of to solve the problems, such as between different battery packs the mutually method of discharge and recharge | |
| CN112186854A (en) | Method for quickly eliminating polarization voltage of lithium ion battery at low cost | |
| CN105048017B (en) | It is a kind of to solve the problems, such as between multiple battery packs the mutually method of discharge and recharge | |
| CN112285581A (en) | Method for shortening formation detection of lithium ion battery | |
| CN109159713A (en) | DC charging control method, online addition detection method and high-power group's charging system | |
| TW201945750A (en) | Method of accurately displaying battery percentage using multiple judging conditions and related battery management unit | |
| CN212588134U (en) | Lithium battery equalization control circuit with charging and power-supplementing functions | |
| CN2922233Y (en) | Over-charging protecting circuit for power lithium ion cell | |
| CN105406530A (en) | Balancing method and balancing circuit for electric quantity of single lithium battery bodies | |
| CN105048572B (en) | A kind of method for realizing different battery pack complete alternation discharge and recharges | |
| CN105048573B (en) | A kind of circuit for realizing different battery pack complete alternation discharge and recharges |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201124 |
|
| WW01 | Invention patent application withdrawn after publication |