CN106154173A - A kind of self discharge screening technique of the cheapest secondary cell easily - Google Patents
A kind of self discharge screening technique of the cheapest secondary cell easily Download PDFInfo
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- CN106154173A CN106154173A CN201610473231.3A CN201610473231A CN106154173A CN 106154173 A CN106154173 A CN 106154173A CN 201610473231 A CN201610473231 A CN 201610473231A CN 106154173 A CN106154173 A CN 106154173A
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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 present invention relates to the self discharge screening technique of the cheapest a kind of secondary cell easily, comprise the following steps: (1), in the constant-voltage charge section of battery partial volume test charging, adds up the constant voltage charging time under the current value in tested battery a certain moment or a certain current value；(2) normal battery constant voltage charging time scope under constant voltage charging phase and tested battery standard current value scope the most in the same time or same current value is determined；(3) by the current value of tested battery or constant voltage charging time compared with the current value of normal battery or constant voltage charging time, if tested current value exceeds the constant voltage charging time constant voltage charging time scope beyond normal battery of standard current value scope or tested battery, then judge that this battery is self discharge exception battery, otherwise, for normal battery.Method of the present invention shortens secondary cell greatly and dispatches from the factory screening time, is effectively increased self-discharge of battery concordance, extends the service life of set of cells.
Description
Technical field
The invention belongs to battery detecting technical field, be specifically related to the self discharge of the cheapest a kind of secondary cell easily
Screening technique.
Background technology
Secondary cell especially lithium ion battery product becomes increasingly popular, the nearlyest 2 years flying along with new-energy automobile
Speed development, the demand of lithium-ion-power cell also occurs that flourishing formula increases.Whether the battery after single battery or connection in series-parallel
Group (system) to the screening of self discharge be all dispatch from the factory before requisite step, especially for battery system, the one of self discharge
Cause property quality has been largely fixed the length in service life of battery system, and the problem after sale of some no-voltage battery cores is also in addition
Spearhead points to the overdischarge that the serious battery core of self discharge causes, and the concordance of self discharge has become the dispatch from foreign news agency except capacity, internal resistance etc.
One of major criterion of core Conformance Assessment.
Currently for the self discharge screening technique of secondary cell especially lithium ion battery, it is broadly divided into two classes: a class is
Utilize precision measurement equipment directly to detect the size of inside battery self-discharge current by certain ways and means, thus calculate
Going out battery self discharge rate size, this kind of method is quickly and easily, but higher to equipment precision requirement, and cannot meet industrialization at present
Demand；Another kind of is by accumulated time method, the open circuit voltage variations feelings of battery in statistics a period of time at a certain temperature
Condition or capacity attenuation situation, set up self-discharge of battery evaluation criterion with this, in any case this type of method is improved, all breaks away from
Do not need the crux that certain time shelves, substantially prolongs the outbound time of battery product, although and high temperature shelve can be big
Amplitude shorten self discharge screening time, but the place of high-temperature aging room and temperature control demand undoubtedly to battery core add one higher
Cost.
Summary of the invention
It is an object of the invention to provide the self discharge screening technique of the cheapest a kind of secondary cell easily, can be effective
Prevent the bigger battery of self discharge from flowing into next process, it addition, by setting up self discharge sorting standard so that battery consistent
Property is greatly promoted.
For achieving the above object, present invention employs techniques below scheme:
The self discharge screening technique of the cheapest a kind of secondary cell easily, comprises the following steps:
(1) in battery partial volume test charging process, the current value that test battery constant voltage charging phase is the most corresponding, statistics
Constant voltage charging time under the current value in tested battery a certain moment or a certain current value；
(2) according to tested battery types and production batch, determine that normal battery is when constant voltage charging phase is identical with tested battery
Constant voltage charging time scope under the standard current value scope carved or same current value；
(3) by the current value of tested battery or constant voltage charging time compared with the current value of normal battery or constant voltage charging time
Relatively, if tested current value fills beyond the constant voltage of normal battery beyond the constant voltage charging time of standard current value scope or tested battery
Electricity time range, then judge that this battery is self discharge exception battery, otherwise, for normal battery.
In step (1), the current value in described tested battery a certain moment, refer to that constant-voltage charge starts during constant-voltage charge
Time timing, the synchronization current value of different tested batteries.Constant voltage charging time under described a certain current value, refers in constant current permanent
In pressure charging process, when constant voltage charging phase starts, timing is to the time required during specified current flow.
In step (3), if the constant voltage charging time that tested current value exceeds standard current value scope or tested battery exceeds
The constant voltage charging time scope of normal battery is the biggest, then battery self discharge rate is the biggest.
As shown from the above technical solution, the self discharge screening side of the cheapest secondary cell easily of the present invention
Method, utilizes under current value or a certain current value in a certain moment of the constant voltage charging phase of battery partial volume test charging process
Constant voltage charging time quickly judges the size of battery self discharge rate, effectively compensate in current two class self discharge screening techniques
Deficiency, reduces the cost of secondary cell self discharge screening, shortens secondary cell greatly and dispatches from the factory screening time, is effectively improved
Self-discharge of battery concordance, extends the service life of set of cells.
Accompanying drawing explanation
Fig. 1 is that the present invention discharges the constant-voltage charge section current versus time curve figure of normal two batteries；
Fig. 2 is the constant-voltage charge section current versus time curve of abnormal still two batteries that self-discharge rate is different of self discharge of the present invention
Figure.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings:
The self discharge screening technique of the cheapest a kind of secondary cell easily, comprises the following steps:
S1: in battery partial volume test charging process, the current value that test battery constant voltage charging phase is the most corresponding, statistics
Constant voltage charging time under the current value in tested battery a certain moment or a certain current value；
In this step, the current value in this tested battery a certain moment, refer to timing when constant-voltage charge starts during constant-voltage charge,
The synchronization current value of different tested batteries.Constant voltage charging time under this certain current value, refers in constant-current constant-voltage charging mistake
Cheng Zhong, when constant voltage charging phase starts, timing is to the time required during specified current flow.
As: need to timing when constant-voltage charge starts by this moment of synchronization T() on the basis of add up different tested battery
Charging current value, or on the basis of same current value I, add up the charging that different tested battery is required under this current value
Time.
S2: according to tested battery types and production batch, determines that normal battery is in constant voltage charging phase and tested battery phase
Constant voltage charging time scope under standard current value scope in the same time or same current value；
S3: by the current value of tested battery or constant voltage charging time compared with the current value of normal battery or constant voltage charging time
Relatively, if tested current value fills beyond the constant voltage of normal battery beyond the constant voltage charging time of standard current value scope or tested battery
Electricity time range, then judge that this battery is self discharge exception battery, otherwise, for normal battery.
As: the current value i scope of the normal battery defining at a time t is that (a and b value is according to battery types for a≤i≤b
Define with production batch), if the scope that the current value I of tested battery is more than i, then can determine whether that tested battery is that self discharge is abnormal electric
Pond, and I is the biggest, the self-discharge rate of tested battery is the biggest.
Equally, the constant voltage charging time t of the normal battery being defined under a certain current value i is in the range of m≤t≤n (m and n
Value defines according to battery types and production batch), if the time T that tested battery is under same electric current i exceedes normal battery t value model
Enclosing, then can determine whether that tested battery is self discharge exception battery, and T value is the biggest, battery self discharge rate is the biggest.
As depicted in figs. 1 and 2, according to tested battery current value the most in the same time, can be by drawing current versus time curve figure
Judge intuitively, should essentially coincide with the constant-voltage charge section curve of a batch of self-discharge rate normal battery, and certainly put
The battery of electrical anomaly then there will be notable difference (such as the i1 > i2 in the t2 moment in Fig. 2), the electric current of the battery that self-discharge rate is the biggest
Value can be the biggest, becomes apparent from of course for difference, and t value preferred value is 600s-1500s；Or with same this electric current of current value i(
Value is to be preferred less than or equal to constant-current charge section current value half) on the basis of add up constant voltage charging time value (this of different battery
Time need to timing when constant-voltage charge starts), the t2 as under i1 value in Fig. 2 > t1, t value the biggest explanation battery self discharge rate is the biggest.
Constant voltage section during the constant-current constant-voltage charging of battery utilizes ever-reduced current versus cell to carry out floating charge
Process, this electric current can present exponential function attenuation trend under normal circumstances；But for the battery of self discharge exception, its inside
Self-discharge current may be close to or reach the numerical value of a certain floating current, when now the constant voltage section charging of battery will continue longer
Between be even continued for, be reflected on constant-voltage charge section curve and i.e. there will be said circumstances.
Embodiment described above is only to be described the preferred embodiment of the present invention, the not model to the present invention
Enclose and be defined, on the premise of designing spirit without departing from the present invention, the those of ordinary skill in the art technical side to the present invention
Various deformation that case is made and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (4)
1. the self discharge screening technique of a quick cheap secondary cell easily, it is characterised in that comprise the following steps:
(1) in battery partial volume test charging process, the current value that test battery constant voltage charging phase is the most corresponding, statistics
Constant voltage charging time under the current value in tested battery a certain moment or a certain current value；
(2) according to tested battery types and production batch, determine that normal battery is when constant voltage charging phase is identical with tested battery
Constant voltage charging time scope under the standard current value scope carved or same current value；
(3) by the current value of tested battery or constant voltage charging time compared with the current value of normal battery or constant voltage charging time
Relatively, if tested current value fills beyond the constant voltage of normal battery beyond the constant voltage charging time of standard current value scope or tested battery
Electricity time range, then judge that this battery is self discharge exception battery, otherwise, for normal battery.
The self discharge screening technique of the cheapest secondary cell easily the most according to claim 1, it is characterised in that step
Suddenly in (1), the current value in described tested battery a certain moment, refer to timing when constant-voltage charge starts during constant-voltage charge, no
Synchronization current value with tested battery.
The self discharge screening technique of the cheapest secondary cell easily the most according to claim 1, it is characterised in that step
Suddenly in (1), the constant voltage charging time under described a certain current value, refer to that, during constant-current constant-voltage charging, constant voltage charging phase is opened
During the beginning, timing is to the time required during specified current flow.
The self discharge screening technique of the cheapest secondary cell easily the most according to claim 1, it is characterised in that step
Suddenly in (3), if tested current value exceeds the constant voltage charging time of standard current value scope or tested battery beyond normal battery
Constant voltage charging time scope is the biggest, then battery self discharge rate is the biggest.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610473231.3A CN106154173A (en) | 2016-06-24 | 2016-06-24 | A kind of self discharge screening technique of the cheapest secondary cell easily |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196204A (en) * | 2018-03-08 | 2018-06-22 | 珠海格力电器股份有限公司 | A kind of method and test device of quick detection lithium ion battery self discharge consistency |
| CN108363020A (en) * | 2018-04-03 | 2018-08-03 | 深圳市道通智能航空技术有限公司 | Determine method and apparatus, chip, battery and the aircraft of battery status |
| CN109387788A (en) * | 2017-08-07 | 2019-02-26 | 丰田自动车株式会社 | The inspection method and manufacturing method of electrical storage device |
| CN110275117A (en) * | 2019-05-28 | 2019-09-24 | 蜂巢能源科技有限公司 | Self-discharge of battery screening technique, apparatus and system |
| CN112415403A (en) * | 2020-10-26 | 2021-02-26 | 深圳市普兰德储能技术有限公司 | Battery self-discharge test method and device, storage medium and equipment |
| CN112994146A (en) * | 2021-02-06 | 2021-06-18 | 苏州极闪控电信息技术有限公司 | Remote management method for sharing mobile power supply |
| CN113238152A (en) * | 2021-05-10 | 2021-08-10 | 昆山聚创新能源科技有限公司 | Lithium battery self-discharge detection method |
| CN113466708A (en) * | 2021-07-27 | 2021-10-01 | 上海纳米技术及应用国家工程研究中心有限公司 | Method for evaluating low-temperature performance of lithium battery |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387788A (en) * | 2017-08-07 | 2019-02-26 | 丰田自动车株式会社 | The inspection method and manufacturing method of electrical storage device |
| CN109387788B (en) * | 2017-08-07 | 2020-10-27 | 丰田自动车株式会社 | Method for inspecting electric storage device and method for manufacturing electric storage device |
| CN108196204A (en) * | 2018-03-08 | 2018-06-22 | 珠海格力电器股份有限公司 | A kind of method and test device of quick detection lithium ion battery self discharge consistency |
| CN108363020A (en) * | 2018-04-03 | 2018-08-03 | 深圳市道通智能航空技术有限公司 | Determine method and apparatus, chip, battery and the aircraft of battery status |
| CN108363020B (en) * | 2018-04-03 | 2020-03-06 | 深圳市道通智能航空技术有限公司 | Method and device for determining battery state, chip, battery and aircraft |
| CN110275117A (en) * | 2019-05-28 | 2019-09-24 | 蜂巢能源科技有限公司 | Self-discharge of battery screening technique, apparatus and system |
| CN112415403A (en) * | 2020-10-26 | 2021-02-26 | 深圳市普兰德储能技术有限公司 | Battery self-discharge test method and device, storage medium and equipment |
| CN112994146A (en) * | 2021-02-06 | 2021-06-18 | 苏州极闪控电信息技术有限公司 | Remote management method for sharing mobile power supply |
| CN113238152A (en) * | 2021-05-10 | 2021-08-10 | 昆山聚创新能源科技有限公司 | Lithium battery self-discharge detection method |
| CN113466708A (en) * | 2021-07-27 | 2021-10-01 | 上海纳米技术及应用国家工程研究中心有限公司 | Method for evaluating low-temperature performance of lithium battery |
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Application publication date: 20161123 |