CN207937575U - A kind of test device of quick detection lithium ion battery self discharge consistency - Google Patents
A kind of test device of quick detection lithium ion battery self discharge consistency Download PDFInfo
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- CN207937575U CN207937575U CN201820319199.8U CN201820319199U CN207937575U CN 207937575 U CN207937575 U CN 207937575U CN 201820319199 U CN201820319199 U CN 201820319199U CN 207937575 U CN207937575 U CN 207937575U
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Abstract
The utility model discloses a kind of test devices of quick detection lithium ion battery self discharge consistency comprising：One charge and discharge device and a heating apparatus, further include at least a pair of of positive and negative polarity wire, the electrical connection correspondings with the positive and negative anodes of charge and discharge electrical interface of the charge and discharge device of one end of the conducting wire, conducting wire the other end equipped with battery core fixture be placed in described in heating apparatus in.The utility model configures a heating apparatus, deterioration processing has been carried out to the normal temperature environment of battery core self discharge, and using voltage change as measurement standard, hot environment is coordinated to accelerate lithium-ion electric core self-discharge rate, shorten test period, quickly, accurately, can also real-time voltage monitoring be carried out to battery core.
Description
Technical field
The utility model is related to the detection field of lithium ion battery cell performance more particularly to a kind of lithium ion battery cells
The test device of self discharge consistency.
Background technology
Self discharge is a kind of phenomenon of battery capacity natural loss in storing process, directly translates into storage one end time
Open-circuit voltage declines afterwards.Common self discharge test method is to use individual charge and discharge device, e.g., battery charging and discharging cabinet,
Arbin electrochemical tests, occasion China electrochemical workstation, etc. equipment, test the battery core of lithium ion battery in normal temperature shelf 28 days
Capacity retention ratio afterwards, then the case where judge battery core self discharge consistency by test data, by the electricity of self discharge consistency difference
Core is rejected.Self discharge consistency difference refers to that the changing rule of battery core self discharge differs, that is to say, that after storage, the electricity of battery core
Press internal resistance variation degree different, cause it is big with batch of battery core voltage internal resistance difference, to influence capacity after battery group
It plays.And it is susceptible to and overcharges during battery group（Charging voltage is excessively high）, cross put（Discharge voltage is too low）Deng safety
Problem, the final service life for reducing battery modules.That is lithium ion battery is very high to self discharge coherence request in groups, in electricity
Core just picks out the good battery core of self discharge consistency using preceding, then can greatly improve service life and the safety of battery modules.By
It is more in the uncertain factor of existing test process, test period is long, it is difficult to accurately and rapidly exclude self discharge consistency difference lithium
Ion battery, so that influencing the performance of capacity after battery group and leaving security risk.
Therefore, a kind of survey of lithium ion battery that is simple and practicable, fast and accurately investigating out self discharge consistency difference is developed
It is industry urgent problem to be solved that trial assembly, which is set,.
Utility model content
The utility model, cannot be fast and accurately in order to solve in existing lithium ion battery cell self discharge uniformity test
The problem of investigating out the battery core of self discharge consistency difference proposes that one kind is simple and practicable, it is consistent fast and accurately to investigate out self discharge
Property difference lithium ion battery test device.
A kind of test device of quick detection lithium ion battery self discharge consistency provided by the utility model comprising：
One charge and discharge device and a heating apparatus further include at least a pair of of positive and negative polarity wire, one end of the conducting wire and the charge and discharge
The positive and negative anodes of the charge and discharge electrical interface of device correspond to electrical connection, the other end of conducting wire is equipped with battery core fixture and is placed in the heating dress
In setting.
Preferably, the conducting wire can be entered by the sealing hole of heating apparatus side in heating apparatus.
Preferably, the battery core fixture can be cylindrical battery fixture, soft-package battery fixture, aluminum-shell battery fixture or
One kind of button cell fixture.
Preferably, the charge and discharge device can be battery charging and discharging cabinet, Arbin electrochemical tests, occasion China electrification
Learn one kind of work station or voltage internal resistance test device.
Preferably, the heating apparatus can be one kind of baking oven, water-bath, Muffle furnace or tube furnace.
The utility model configures a heating apparatus and has carried out deterioration processing to the normal temperature environment of battery core self discharge so that charge and discharge
The environment temperature of electricity increases, so that accelerating the process of battery core self discharge.The battery core voltage change of this method test gained, than
A voltage calibration value is arranged according to the groups of requirement of battery modules and selftest data in voltage change higher under room temperature,
The real-time voltage variation after battery shelves a short period is detected by charge and discharge device again, then shelves front and back voltage by battery core
Changing value is compared with the voltage calibration value, to fast and accurately be judged the consistency of self-discharge of battery, and is selected
The good battery of self discharge consistency.The utility model is to coordinate hot environment to accelerate using voltage change as measurement standard
Lithium-ion electric core self-discharge rate shortens the period of test battery core self discharge.The computer end pair of charge and discharge device can also be passed through
Battery core carries out real-time voltage monitoring.
Description of the drawings
Fig. 1 is the schematic diagram of the preferred embodiment of the utility model test device.
Wherein, 1- charge and discharge devices, 2- heating apparatus, 3- conducting wires, 4- battery cores fixture, 5 battery cores.
Specific implementation mode
The utility model is further described with reference to embodiment and attached drawing.
As shown in Figure 1, being a kind of composition of the preferred embodiment of test device provided by the utility model.The test
Device comprising：One charge and discharge device 1 and a heating apparatus 2, further include at least a pair of of positive and negative polarity wire 3, and the one of the conducting wire 3
End electrical connection corresponding with the positive and negative anodes of charge and discharge electrical interface of charge and discharge device 1, the other end of conducting wire 3 are equipped with 4 juxtaposition of battery core fixture
In in the babinet of heating apparatus 2.In the present embodiment, conducting wire can enter heating dress by the sealing hole of 2 side of heating apparatus
It sets in babinet, sealing hole is effectively sealed against, and the set temperature to ensure heating apparatus is constant.As needed, conducting wire 3 can be with
It is arranged to multipair, e.g., is arranged to ten pairs or more conducting wires, so can disposably detect multiple battery cores 5.Battery core fixture 4 can
To select one kind of cylindrical battery fixture, soft-package battery fixture, aluminum-shell battery fixture or button cell fixture.Charge and discharge device
1 can select battery charging and discharging cabinet, Arbin electrochemical tests, occasion China electrochemical workstation or voltage internal resistance test device one
Kind.Heating apparatus 2 can select one kind of baking oven, water-bath, Muffle furnace or tube furnace.
Incorporated by reference to Fig. 1, the concrete application of the utility model is as follows：
Embodiment 1：
First, it checks and confirms that the battery core fixture 4 being set in baking oven 2 is electrically connected with the positive and negative anodes of battery charging and discharging cabinet 1, it will be electric
Core fixture 4 corresponds to the positive and negative anodes lug for being held on lithium-ion electric core 5 to be measured, can fix ten battery cores respectively.Baking oven 2 is set again
Charge and discharge electro-temperature be 60 DEG C, to shelve the time be 120 min for the charge and discharge of battery charging and discharging cabinet 1.
Then, the booting of baking oven 2 is powered, and when remaining charge and discharge temperature 60 C in baking oven, starts 1 work of battery charging and discharging cabinet
Make program, when 120 min of time is shelved in arrival charge and discharge, can be seen in real time by the computer control terminal of battery charging and discharging cabinet 1
The variation of the voltage of battery core 5 is observed, and records the voltage value of battery core.
Finally, it calculates the electric discharge of battery core 5 and shelves front and back voltage change, and voltage change is less than or equal to voltage mark
Definite value：The battery core of -2 mV sorts out, and is used as lithium ion battery in groups.
When voltage change is less than or equal to -2 mV, illustrate that the battery is small by self discharge effects, i.e. self discharge is consistent
Property is good.When voltage change be greater than or equal to -10 mV, illustrate that the battery is big by self discharge effects, i.e. self discharge consistency
Difference is included into defective products battery core classification.
As needed, charge and discharge electro-temperature is also an option that 62 DEG C, 64 DEG C etc.；The time is shelved in charge and discharge can also select 130
Min, 140 min etc., voltage calibration value can also select -3 mV etc..
Embodiment 2：
First, it checks and determines that the positive and negative anodes for the battery core fixture 4 and Arbin electrochemical tests 1 being set in Muffle furnace 2 are electrically connected
It connects, battery core fixture 4 is corresponded to the positive and negative anodes lug for being held on lithium-ion electric core 5 to be measured, ten battery cores can be fixed respectively.It sets again
The charge and discharge electro-temperature for setting Muffle furnace 2 is 65 DEG C, to shelve the time be 150 min for the charge and discharge of Arbin electrochemical tests 1.
Then, the booting of Muffle furnace 2 is powered, and when remaining 65 DEG C of charge and discharge electro-temperature in Muffle furnace, starts Arbin electrochemistry
1 working procedure of tester passes through the computer control of Arbin electrochemical tests 1 when 150 min of time is shelved in arrival charge and discharge
End processed can observe the variation of the voltage of battery core 5 in real time, and record the voltage value of battery core.
Finally, it calculates the electric discharge of battery core 5 and shelves front and back voltage change, and voltage change is less than or equal to voltage mark
Definite value：The battery core of -4 mV sorts out, and is used as lithium ion battery in groups.
When voltage change is less than or equal to -4 mV, illustrate that the battery is small by self discharge effects, i.e. self discharge is consistent
Property is good.When voltage change be greater than or equal to -8 mV, illustrate that the battery is big by self discharge effects, i.e. self discharge consistency is poor,
It is included into defective products battery core classification.
The utility model configures a heating apparatus and has carried out deterioration processing to the normal temperature environment of battery core self discharge so that charge and discharge
The environment temperature of electricity increases, and accelerates the process of battery core self discharge.The utility model be using voltage change as measurement standard,
Coordinate hot environment to accelerate lithium-ion electric core self-discharge rate, shortens the period of test battery core self discharge.It can also be by filling
The computer end of electric discharge device carries out real-time voltage monitoring to battery core.
Embodiment described above is primarily to illustrate the creating conception of the utility model, it is noted that for this
For the those of ordinary skill in field, without departing from the concept of the premise utility, several deformations can also be made and changed
Into these belong to the scope of protection of the utility model.
Claims (5)
1. a kind of test device of quick detection lithium ion battery self discharge consistency, which is characterized in that including a charge and discharge Denso
Set with a heating apparatus, further include at least a pair of of positive and negative polarity wire, the charge and discharge of one end of the conducting wire and the charge and discharge device
The positive and negative anodes of interface correspond to electrical connection, the other end of conducting wire is equipped with battery core fixture and is placed in the heating apparatus.
2. test device as described in claim 1, which is characterized in that the conducting wire is close by the heating apparatus side
Sealing of hole enters in heating apparatus.
3. test device as described in claim 1, which is characterized in that the battery core fixture is cylindrical battery fixture, soft
One kind of packet battery clamp, aluminum-shell battery fixture or button cell fixture.
4. test device as described in claim 1, which is characterized in that the charge and discharge device be battery charging and discharging cabinet,
One kind of Arbin electrochemical tests, occasion China electrochemical workstation or voltage internal resistance test device.
5. test device as described in claim 1, which is characterized in that the heating apparatus is baking oven, water-bath, Muffle furnace
Or one kind of tube furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820319199.8U CN207937575U (en) | 2018-03-08 | 2018-03-08 | A kind of test device of quick detection lithium ion battery self discharge consistency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820319199.8U CN207937575U (en) | 2018-03-08 | 2018-03-08 | A kind of test device of quick detection lithium ion battery self discharge consistency |
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| Publication Number | Publication Date |
|---|---|
| CN207937575U true CN207937575U (en) | 2018-10-02 |
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|---|---|---|---|
| CN201820319199.8U Active CN207937575U (en) | 2018-03-08 | 2018-03-08 | A kind of test device of quick detection lithium ion battery self discharge consistency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207937575U (en) |
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2018
- 2018-03-08 CN CN201820319199.8U patent/CN207937575U/en active Active
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