CN109342954A - A kind of battery testing analysis structure and its manufacturing method and battery testing analysis method - Google Patents
A kind of battery testing analysis structure and its manufacturing method and battery testing analysis method Download PDFInfo
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- CN109342954A CN109342954A CN201811246835.XA CN201811246835A CN109342954A CN 109342954 A CN109342954 A CN 109342954A CN 201811246835 A CN201811246835 A CN 201811246835A CN 109342954 A CN109342954 A CN 109342954A
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- pole piece
- battery
- isolation film
- battery core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- 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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a kind of battery testings to analyze structure, including encapsulating shell, the n being placed in the encapsulating shell battery cores successively stacked and the electrolyte for being injected into encapsulating shell, battery core includes the first pole piece, the second pole piece and the isolation film being arranged between the first pole piece and the second pole piece, the isolation film number of plies of n battery core is followed successively by 1,2,3......n, and the first pole piece and the second pole piece are provided with tab.The present invention, which can be realized, tests battery material under finished battery environment, reduce the error for measuring and generating individually for battery raw material, and it is flexibly stacked using the battery core of multiple and different isolation film numbers of plies or the battery core with positive and negative plate, the impedance and conductivity of battery material can not only be measured under the same battery context, moreover it is possible to high-efficiency and economic and the accurately physicochemical characteristics of analysis battery material.In addition, the invention also discloses the manufacturing methods and battery testing analysis method of a kind of battery testing analysis structure.
Description
Technical field
The invention belongs to the technical fields of battery analysis device, and in particular to a kind of battery testing analysis structure and its manufacture
Method and battery testing analysis method.
Background technique
Nowadays, along with the arriving of information-based cyberage, energy source use form is changing, renewable, nothing
Pollution, small-sized discrete removable high-performance power supply demand rapid growth.Each state is all greatly developing green, high efficient secondary electricity
Pond.Lithium ion battery as a kind of new secondary battery, have energy density and power density are big, operating voltage is high, it is light-weight,
It is small in size, have extended cycle life, the advantages that safety is good, environmentally protective, in portable electronics, electric tool, large-scale energy storage, electronic
Traffic electrical source of power etc. has broad application prospects.Internal resistance is to measure one of the important indicator of performance of lithium ion battery,
It determines the cycle performance and high rate performance of lithium ion battery, and the conductivity of positive and negative pole material and isolation film is largely
The internal resistance of battery is determined, so the conductivity of positive and negative pole material and isolation film is that battery core factory and raw material factory pay close attention to performance
Parameter.
Existing test method is that positive and negative pole material and isolation film are detached from system, separates and carry out conductivity survey
Examination, measurement result can not embody the conductivity of positive and negative anodes and isolation film in corresponding system completely.Wherein, Chinese patent
Document discloses the measurement method and system (publication number: CN 108318822 of a kind of lithium battery pole slice and isolation membrane conductivity
A), comprising: use mesuring battary sample making, n confinement type Soft Roll Symmetrical cells, the isolation of n confinement type Soft Roll Symmetrical cells
Film layer number is followed successively by 1,2,3,4......n；Measure n confinement type Soft Roll Symmetrical cells internal resistance, be denoted as R1, R2,
R3.....Rn；By the internal resistance of n confinement type Soft Roll Symmetrical cells be isolated from it film layer number carry out linear fit obtain slope b and
Intercept a；It is calculated from the formula isolation membrane conductivity K and pole piece conductivity k.Above-mentioned scheme can calculate to a certain extent every
Precision from membrane conductivity, but at least there is also following defects for this scheme: first, this method needs to prepare multiple groups and contains not
With the Symmetrical cells of the isolation film number of plies；Second, the Symmetrical cells under varying environment have differences, and leading to measurement result, there are larger
Error；Third, needs retest multiple groups Symmetrical cells, and working efficiency is lower.
Summary of the invention
It is an object of the present invention to: in view of the deficiencies of the prior art, a kind of battery testing analysis structure is provided, it can
Realization tests battery material under finished battery environment, reduces the mistake for measuring and generating individually for battery raw material
Difference, and flexibly being stacked using the battery core of multiple and different isolation film numbers of plies or battery core with positive and negative plate, can not only be
The impedance and conductivity that battery material is measured under the same battery context reduce the error that multiple groups battery sample generates, moreover it is possible to high
Effect is economical and accurately analyzes the physicochemical characteristics of battery material.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of battery testing analysis structure, including encapsulating shell, the n being placed in the encapsulating shell battery cores successively stacked
And it is injected into the electrolyte of the encapsulating shell, the battery core includes the first pole piece, the second pole piece and is arranged in first pole piece
The isolation film number of plies of isolation film between second pole piece, the n battery cores is followed successively by 1,2,3......n, described
First pole piece and second pole piece are provided with tab.Because measuring the physical chemistry of battery material under finished battery environment
Characteristic is higher than the accuracy of independent measurement battery material, and under a battery context, and the ingredient and temperature of electrolyte become
Change essentially identical, so the battery core of the n different isolation film numbers of plies is successively stacked, and is placed on the same encapsulating shell composition battery and surveys
Analysis institution is tried, can guarantee that the battery core of the different isolation film numbers of plies is to measure impedance under identical environment, reduces electrolyte to survey
It influences caused by test result, and one battery analysis installation cost of manufacture is lower, while satisfaction reduces cost, can also improve
Testing efficiency.
As a kind of a kind of improvement of battery testing analysis structure of the present invention, first pole piece, the isolation
Film and second pole piece form the battery core by lamination process or winding process.Lamination process and winding process are production
The conventional process of battery, lamination process is relatively easy to operate, can both reach identical effect.
As a kind of a kind of improvement of battery testing analysis structure of the present invention, first pole piece and described second
The substrate of pole piece is one of copper foil, aluminium foil and nickel foil.It further include other pending performances in addition to copper foil, aluminium foil and nickel foil
The material of test helps to find out suitable battery material by battery testing analytical equipment.
As a kind of a kind of improvement of battery testing analysis structure of the present invention, the isolation film is that PP material is porous
The composite porous film of film, PE material perforated membrane or PP and PE.
As a kind of a kind of improvement of battery testing analysis structure of the present invention, at least one battery core it is described
First pole piece and second pole piece are positive plate, negative electrode tab, copper foil base material, Al foil substrate or nickel foil substrate.
As a kind of a kind of improvement of battery testing analysis structure of the present invention, at least one battery core it is described
First pole piece and second pole piece are respectively positive plate and negative electrode tab；And/or at least one described first pole piece and described
Two pole pieces are respectively copper foil base material and Al foil substrate.
The second object of the present invention is the provision of a kind of manufacturing method of battery testing analysis structure, including walks as follows
It is rapid:
1) tab is respectively welded at n the first pole pieces and the second pole piece, then between the first pole piece and the second pole piece
It is put into the isolation film of (1-n) layer, and is sequentially overlapped or winds and form n battery core；
2) n battery core is stacked, if positive plate and negative electrode tab are stacked, then be put into therebetween one layer every
From film；
3) battery testing finally is made by encapsulation, dry, fluid injection and degasification and analyzes structure.
In the manufacturing method of the present invention, in step 1), due to ensure battery other factors it is constant in the case where, first
Impedance between pole piece and the second pole piece increases with the number of plies of isolation film and is increased, so putting in the first pole piece and the second pole piece
Enter different layers of isolation films, help to reduce independent measurement pole piece and isolation film and bring error, while in the first pole piece and the
Two pole piece soldering polar ears help to test impedance between the two；In step 2), n battery core is stacked, it is more without manufacturing
A different layers of Symmetrical cells help to simplify production stage, while can reduce production cost, moreover it is possible to accelerate test speed
Degree.
The third object of the present invention is the provision of a kind of method of battery testing analysis, includes the following steps:
S1, prepare battery testing analysis structure；
The impedance value of S2, respectively the both ends tab of n battery core of measurement；
S3, the corresponding impedance value of n battery core is isolated from it film layer number carry out linear fit, drafting obtain impedance value with every
Change curve from film layer number；
S4, according to impedance value with the change curve of the isolation film number of plies, obtain slope, as the ionic resistance R of isolation film；
S5, it is calculated from the formula isolation film ionic conductivity；
The formula are as follows:Wherein ρ is isolation film ionic conductivity, and L is isolation film thickness, and S is having for isolation film
Imitate area.
A kind of improvement of method as a kind of battery testing analysis of the present invention, in step S2, the impedance value
Measuring instrument be internal resistance instrument or electrochemical workstation.
In method for testing and analyzing of the invention, in step S1, in addition to prepare battery analysis structure, further include test equipment and
Connecting line；Step S3, since battery core is that the isolation film number of plies is different, other factors are basically unchanged, are conducive to during the test
Linear fit calculating is carried out to the number of plies of multiple groups impedance and isolation film, to obtain the two change curve；In step S5, isolation film
The effective area of thickness and isolation film can show that isolation film ionic conductivity is according to independent by independent measurement isolation film
Isolation film is measured, error range is larger, it is unfavorable for carrying out battery test analysis, and use in battery testing analytical equipment
Measurement, can improve the precision of calculated result.
A kind of method of battery testing analysis is additionally provided, is included the following steps:
A, the impedance value of the both ends tab of n battery core is measured respectively；
B, according to impedance value, the impedance of positive plate, negative electrode tab and battery is analyzed and determined.
In method for testing and analyzing of the invention, in step a, battery core both ends pole is measured by internal resistance instrument or electrochemical workstation
The impedance value of ear；In step b, there is the battery core of positive and negative plate by stacking, constitutes a complete battery, be not only completed survey
The impedance for measuring positive and negative plate, the DCR for being completed at the same time battery are decomposed, moreover it is possible to which the impedance for obtaining the different parts of battery accounts for entire electricity
Ratio in pond, the research and development for low-resistance electrical resistance method provide direction.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram that battery core of the invention stacks；
Fig. 3 is the structural schematic diagram of the first pole piece of the invention, the second pole piece and isolation film；
Fig. 4 is the Linear Fit Chart of the impedance of embodiment 7 and the diaphragm number of plies in the present invention；
Wherein: 1- battery core；The first pole piece of 11-；The second pole piece of 12-；13- isolation film；5- tab.
Specific embodiment
As used some vocabulary to censure specific components in the specification and claims.Those skilled in the art answer
It is understood that hardware manufacturer may call the same component with different nouns.This specification and claims are not with name
The difference of title is as the mode for distinguishing component, but with the difference of component functionally as the criterion of differentiation.Such as logical
The "comprising" of piece specification and claim mentioned in is an open language, therefore should be construed to " include but do not limit
In "." substantially " refer within an acceptable error range, those skilled in the art can solve technology within a certain error range
Problem basically reaches technical effect.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", level "
The orientation or positional relationship of equal instructions is to be based on the orientation or positional relationship shown in the drawings, be merely for convenience of the description present invention and
Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction
And operation, therefore be not considered as limiting the invention.
In invention unless specifically defined or limited otherwise, the arts such as term " installation ", " connected ", " connection ", " fixation "
Language shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machinery
Connection, is also possible to be electrically connected；It can be directly connected, two elements can also be can be indirectly connected through an intermediary
Internal connection.For the ordinary skill in the art, above-mentioned term can be understood in the present invention as the case may be
In concrete meaning.
Below in conjunction with attached drawing, invention is further described in detail, but not as a limitation of the invention.
Embodiment 1
As shown in Figures 1 to 3, a kind of battery testing analyzes structure, a successively including encapsulating shell, the n being placed in encapsulating shell
The battery core 1 that stacks and the electrolyte for being injected into encapsulating shell, battery core 1 include the first pole piece 11, the second pole piece 12 and are arranged first
Isolation film 13 between pole piece 11 and the second pole piece 12,13 number of plies of isolation film of n battery core 1 are followed successively by 1,2,3......n, the
One pole piece 11 and the second pole piece 12 are provided with tab 5.Because measuring the physical chemistry of battery material under finished battery environment
Characteristic is higher than the accuracy of independent measurement battery material, and under a battery context, and the ingredient and temperature of electrolyte become
Change essentially identical, so the battery core 1 of n different 13 numbers of plies of isolation film is successively stacked, and is placed on the same encapsulating shell composition electricity
Pond test analysis mechanism can guarantee that the battery core 1 of different 13 numbers of plies of isolation film is that impedance is measured under identical environment, reduce electrolysis
Liquid is influenced caused by test result, and one battery analysis installation cost of manufacture is lower, while satisfaction reduces cost,
Testing efficiency can be improved.
Preferably, the first pole piece 11, isolation film 13 and the second pole piece 12 form battery core by lamination process or winding process
1.Lamination process and winding process are the conventional process for making battery, and lamination process is relatively easy to operate, can both reach
Identical effect.
Preferably, the substrate of the first pole piece 11 and the second pole piece 12 is one of copper foil, aluminium foil and nickel foil.In addition to copper
Foil, aluminium foil and nickel foil further include the material of other pending performance tests, by battery testing analytical equipment, help to find out
Suitable battery material.
Preferably, isolation film 13 is the composite porous film of PP material perforated membrane, PE material perforated membrane or PP and PE.Isolation film
For microporosity and porous film, positive/negative plate can be isolated, prevent inside battery positive and negative anodes short-circuit, material based on PP, PE,
However the isolation film 13 of unlike material has different ions conductivity, by battery testing analytical equipment, it is suitable to help to find out
13 material of isolation film.
Preferably, the first pole piece 11 and the second pole piece 12 of n battery core 1 are positive plate, negative electrode tab, copper foil base material, aluminium
Paper tinsel base material or nickel foil substrate.According to the demand of test, positive plate, negative electrode tab, copper foil base material, Al foil substrate or nickel foil can be used
Substrate, and do not influence to test the ionic conductivity of isolation film 13, only it need to guarantee that 13 material of isolation film is constant.
It should be understood that different 1 overlaying structures of battery core designs, it can be deduced that different battery testings analyzes structure,
And different test analysis structures corresponds to different test items, while user can also be according to the demand of test item to battery core
1 structure is configured, and the battery testing analysis structure of 2~5 pairs of different function of following example is illustrated.
Embodiment 2
Unlike the first embodiment: the first pole piece 11 and the second pole piece 12 of at least one battery core 1 of the present embodiment are positive
Pole piece.If the first pole piece 11 of one of battery core 1 and the second pole piece 12 are positive plate, 11 He of the first pole piece of remaining battery core 1
Second pole piece 12 is negative electrode tab, can be used to test the ionic conductivity of isolation film 13 and the impedance of positive and negative plate；It needs to illustrate
, only can according to need and be configured, for measuring for example, in practical application with the division progress of above-mentioned function
The impedance of positive plate and copper foil base material, the impedance of positive plate and Al foil substrate or the impedance of positive plate and nickel foil substrate.
Other structures are same as Example 1, and which is not described herein again.
Embodiment 3
Unlike the first embodiment: the first pole piece 11 and the second pole piece 12 of at least one battery core 1 of the present embodiment are negative
Pole piece.If the first pole piece 11 of one of battery core 1 and the second pole piece 12 are negative electrode tab, 11 He of the first pole piece of remaining battery core 1
Second pole piece 12 is positive plate, can be used to test the ionic conductivity of isolation film 13 and the impedance of positive and negative plate；It needs to illustrate
, only can according to need and be configured, for measuring for example, in practical application with the division progress of above-mentioned function
The impedance of negative electrode tab and copper foil base material, the impedance of negative electrode tab and Al foil substrate or the impedance of negative electrode tab and nickel foil substrate.
Other structures are same as Example 1, and which is not described herein again.
Embodiment 4
Unlike the first embodiment: the first pole piece 11 and the second pole piece 12 of at least one battery core 1 of the present embodiment are respectively
Positive plate and negative electrode tab.If the first pole piece 11 of one of battery core 1 and the second pole piece 12 are positive plate, another battery core 1
First pole piece 11 and the second pole piece 12 are negative electrode tab, and the first pole piece 11 and the second pole piece 12 of remaining battery core 1 are respectively positive plate
And negative electrode tab, a complete battery is constituted, can be used to test the impedance of positive and negative plate and the impedance of a completed cell；
It should be noted that only can according to need and be configured for example, in practical application with the division progress of above-mentioned function,
The first pole piece 11 and the second pole piece 12 that need to only ensure at least one battery core 1 are respectively positive plate and negative electrode tab, may make up one
Complete battery structure.
Other structures are same as Example 1, and which is not described herein again.
Embodiment 5
Unlike the first embodiment: the first pole piece 11 and the second pole piece 12 of at least one battery core 1 of the present embodiment are respectively
Positive plate and negative electrode tab；It is respectively copper foil base material and Al foil substrate at least one first pole piece 11 and the second pole piece 12.Such as it
In battery core 1 the first pole piece 11 and the second pole piece 12 be positive plate, the first pole piece 11 of one of battery core 1 and the second pole
Piece 12 is negative electrode tab, and the first pole piece 11 and the second pole piece 12 of one of battery core 1 are respectively positive plate and negative electrode tab, wherein one
The first pole piece 11 and the second pole piece 12 of a battery core 1 are copper foil base material, the first pole piece 11 of one of battery core 1 and the second pole
Piece 12 is Al foil substrate, and the first pole piece 11 and the second pole piece 12 of one of battery core 1 are respectively copper foil base material and aluminium foil base
Material constitutes a complete battery, can be used to test the impedance of positive and negative plate and the impedance of a completed cell；It needs
It is bright, only it can according to need and be configured, need to ensure for example, in practical application with the division progress of above-mentioned function
It the chemical reaction such as spontaneous can be aoxidized, be restored in the first pole piece 11 of the same battery core 1 and the second pole piece 12, such as battery core 1
The first pole piece 11 and the second pole piece 12 be respectively copper foil base material and Al foil substrate, also may make up a complete battery structure.
Other structures are same as Example 1, and which is not described herein again.
Embodiment 6
As shown in Figures 1 to 3, the manufacturing method of the battery testing analysis structure of a kind of Examples 1 to 5, includes the following steps:
1) tab 5 is respectively welded at n the first pole pieces 11 and the second pole piece 12, then in the first pole piece 11 and the second pole
It is put into the isolation film 13 of (1-n) layer between piece 12, and is sequentially overlapped or winds and form n battery core 1；
2) n battery core 1 is stacked, if positive plate and negative electrode tab are stacked, is then put into one layer therebetween
Isolation film 13；
3) battery testing finally is made by encapsulation, dry, fluid injection and degasification and analyzes structure.
It should be noted that: in the manufacturing method of the present invention, in step 1), due to other factors for ensuring battery not
In the case where change, the impedance between the first pole piece 11 and the second pole piece 12 increases with the number of plies of isolation film 13 and is increased, so
Different layers of isolation films 13 are put into first pole piece 11 and the second pole piece 12, help to reduce independent measurement pole piece and isolation film
13 bring error, while in 12 soldering polar ear 5 of the first pole piece 11 and the second pole piece, helping to test impedance between the two；Step
It is rapid 2) in, n battery core 1 is stacked, without manufacturing the Symmetrical cells of multiple and different numbers of plies, helps to simplify production stage,
It can reduce production cost simultaneously, moreover it is possible to accelerate test speed.
Embodiment 7
As shown in figures 1-4, the method for the battery testing analysis of a kind of Examples 1 to 3, includes the following steps:
S1, prepare battery testing analysis structure；
The impedance value of S2, respectively the both ends tab 5 of n battery core 1 of measurement；
S3, the n corresponding impedance value of battery core 1 is isolated from it to 13 number of plies of film progress linear fit, drafting obtains impedance value
With the change curve of 13 number of plies of isolation film；
S4, according to impedance value with the change curve of 13 number of plies of isolation film, obtain slope, the as ionic resistance of isolation film 13
R；
S5, it is calculated from the formula 13 ionic conductivity of isolation film；
Formula are as follows:Wherein ρ is 13 ionic conductivity of isolation film, and L is 13 thickness of isolation film, and S is isolation film 13
Effective area.
In above-mentioned steps, the measuring instrument of impedance value is internal resistance instrument or electrochemical workstation.
It should be noted that: in method for testing and analyzing of the invention, in step S1, in addition to preparing battery analysis structure,
It further include test equipment and connecting line；Step S3, since battery core 1 is that the isolation film number of plies 13 is different, other factors are basically unchanged,
Be conducive to carry out linear fit calculating to the number of plies of multiple groups impedance and isolation film 13 during the test, to obtain the two variation
Curve；In step S5, the effective area of 13 thickness of isolation film and isolation film 13 can be obtained by independent measurement isolation film 13,
For 13 ionic conductivity of isolation film according to independent measurement isolation film, error range is larger, is unfavorable for carrying out battery test point
Analysis, and use and measured in battery testing analytical equipment, the precision of calculated result can be improved.
Embodiment 8
As shown in Figures 1 to 3, the method for the battery testing analysis of a kind of embodiment 4-5, includes the following steps:
A, the impedance value of the both ends tab 5 of n battery core 1 is measured respectively；
B, according to impedance value, the impedance of positive plate, negative electrode tab and battery is analyzed and determined.
It should be noted that: in method for testing and analyzing of the invention, in step a, pass through internal resistance instrument or electrochemical operation
It stands and measures the impedance value of 1 both ends tab 5 of battery core；In step b, there is the battery core 1 of positive and negative plate by stacking, composition one is complete
Whole battery is not only completed the impedance of measurement positive and negative plate, and the DCR for being completed at the same time battery is decomposed, moreover it is possible to obtain the difference of battery
The impedance at position accounts for the ratio in entire battery, and the research and development for low-resistance electrical resistance method provide direction.
According to the disclosure and teachings of the above specification, those skilled in the art in the invention can also be to above-mentioned embodiment party
Formula is changed and is modified.Therefore, the invention is not limited to above-mentioned specific embodiment, all those skilled in the art exist
Made any conspicuous improvement, replacement or modification all belong to the scope of protection of the present invention on the basis of the present invention.This
Outside, although using some specific terms in this specification, these terms are merely for convenience of description, not to the present invention
Constitute any restrictions.
Claims (10)
1. a kind of battery testing analyzes structure, it is characterised in that: a successively including encapsulating shell, the n being placed in the encapsulating shell
The battery core (1) that stacks and the electrolyte for being injected into the encapsulating shell, the battery core (1) include the first pole piece (11), the second pole piece
(12) and isolation film (13) between first pole piece (11) and second pole piece (12), a battery cores (1) of n are set
The isolation film (13) number of plies be followed successively by 1,2,3......n, first pole piece (11) and second pole piece (12) are all provided with
It is equipped with tab (5).
2. a kind of battery testing as described in claim 1 analyzes structure, it is characterised in that: first pole piece (11), described
Isolation film (13) and second pole piece (12) form the battery core (1) by lamination process or winding process.
3. a kind of battery testing as described in claim 1 analyzes structure, it is characterised in that: first pole piece (11) and described
The substrate of second pole piece (12) is one of copper foil, aluminium foil and nickel foil.
4. a kind of battery testing as described in claim 1 analyzes structure, it is characterised in that: the isolation film (13) is PP material
The composite porous film of perforated membrane, PE material perforated membrane or PP and PE.
5. a kind of battery testing as described in claim 1 analyzes structure, it is characterised in that: at least one battery core (1)
First pole piece (11) and second pole piece (12) are positive plate, negative electrode tab, copper foil base material, Al foil substrate or nickel foil base
Material.
6. a kind of battery testing as claimed in claim 5 analyzes structure, it is characterised in that: at least one battery core (1)
First pole piece (11) and second pole piece (12) are respectively positive plate and negative electrode tab；And/or at least one described first
Pole piece (11) and second pole piece (12) are respectively copper foil base material and Al foil substrate.
7. a kind of manufacturing method of the described in any item battery testing analysis structures of claim 1~6, includes the following steps:
1) tab (5) is respectively welded at n the first pole pieces (11) and the second pole piece (12), then in the first pole piece (11) and the
It is put into the isolation film (13) of (1-n) layer between two pole pieces (12), and is sequentially overlapped or winds and form n battery core (1)；
2) n battery core (1) is stacked, if positive plate and negative electrode tab are stacked, then be put into therebetween one layer every
From film (13)；
3) battery testing finally is made by encapsulation, dry, fluid injection and degasification and analyzes structure.
8. a kind of method of the described in any item battery testing analyses of Claims 1 to 5, includes the following steps:
S1, prepare battery testing analysis structure；
The impedance value of S2, respectively the both ends tab (5) of n battery core (1) of measurement；
S3, the corresponding impedance value of n battery core (1) is isolated from it to film (13) number of plies progress linear fit, drafting obtains impedance value
With the change curve of isolation film (13) number of plies；
S4, according to impedance value with the change curve of isolation film (13) number of plies, obtain slope, the as ionic resistance of isolation film (13)
R；
S5, it is calculated from the formula isolation film (13) ionic conductivity；
The formula are as follows:Wherein ρ is isolation film (13) ionic conductivity, and L is isolation film (13) thickness, and S is isolation film
(13) effective area.
9. a kind of method of battery testing analysis as claimed in claim 8, it is characterised in that: in step S2, the impedance value
Measuring instrument be internal resistance instrument or electrochemical workstation.
10. a kind of method of battery testing analysis as claimed in claim 6, includes the following steps:
A, the impedance value of the both ends tab (5) of n battery core (1) is measured respectively；
B, according to impedance value, the impedance of positive plate, negative electrode tab and battery is analyzed and determined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246835.XA CN109342954A (en) | 2018-10-25 | 2018-10-25 | A kind of battery testing analysis structure and its manufacturing method and battery testing analysis method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246835.XA CN109342954A (en) | 2018-10-25 | 2018-10-25 | A kind of battery testing analysis structure and its manufacturing method and battery testing analysis method |
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| CN109342954A true CN109342954A (en) | 2019-02-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577682A (en) * | 2023-07-12 | 2023-08-11 | 江苏正力新能电池技术有限公司 | Decomposition test method for direct current internal resistance of secondary battery |
| CN117254147A (en) * | 2023-11-20 | 2023-12-19 | 江苏中兴派能电池有限公司 | Secondary battery for experiment, preparation method thereof and testing method of battery |
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2018
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577682A (en) * | 2023-07-12 | 2023-08-11 | 江苏正力新能电池技术有限公司 | Decomposition test method for direct current internal resistance of secondary battery |
| CN117254147A (en) * | 2023-11-20 | 2023-12-19 | 江苏中兴派能电池有限公司 | Secondary battery for experiment, preparation method thereof and testing method of battery |
| CN117254147B (en) * | 2023-11-20 | 2024-02-06 | 江苏中兴派能电池有限公司 | Secondary battery for experiment, preparation method thereof and testing method of battery |
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