CN109596982A - battery detection structure - Google Patents
battery detection structure Download PDFInfo
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- CN109596982A CN109596982A CN201710898032.1A CN201710898032A CN109596982A CN 109596982 A CN109596982 A CN 109596982A CN 201710898032 A CN201710898032 A CN 201710898032A CN 109596982 A CN109596982 A CN 109596982A
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- pole piece
- packaging bag
- battery
- detecting structure
- tab
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Abstract
The invention provides a battery detection structure which comprises a battery unit and two clamping plates. The battery unit comprises a packaging bag, a first pole piece, an isolation film, a second pole piece, a first pole lug and a second pole lug. The first pole piece, the isolating film and the second pole piece are sequentially stacked and contained in the packaging bag, and the polarities of the first pole piece and the second pole piece are opposite. The first pole lug is fixed on the first pole piece and extends out of the packaging bag, and the second pole lug is fixed on the second pole piece and extends out of the packaging bag. The two clamping plates respectively clamp the packaging bag from two sides. The battery detection structure is less in material consumption, low in cost, short in manufacturing period and convenient to disassemble, and facilitates in-situ reverse analysis, and electrode replacement and collocation in different states are facilitated. The clamping action of the two clamping plates can ensure that the battery unit has good electrochemical performance and can truly realize the pressure environment of the pole piece in practical use.
Description
Technical field
The present invention relates to field of batteries more particularly to a kind of battery detecting structures.
Background technique
Lithium ion battery is an extremely complex system, and actual performance is the result of many factors comprehensive function.No
With the reciprocal effect that there is complexity between the active material of chemical component, between different activities material and manufacturing process.In order to comment
The influence of active material and pole piece manufacturing process to performance of lithium ion battery is estimated, at present mainly by active material and certain conduction
Agent and binder mixing, are made pole piece using certain pole piece manufacturing process, are then assembled into button cell or have multilayer pole
The packed battery of piece.It after being tested using specific process assembled battery, then is reversely analyzed, with further
The operation mechanism of electrolytic cell.
Button cell is to electrode with lithium metal generally using active material or pole piece to be assessed as working electrode.Due to
Lithium metal can constantly provide new lithium ion to supplement the irreversible loss of lithium ion in circulation storing process, so can not be complete
The true battery capacity decaying behavioural characteristic of full response.In addition the implementing process difficulty that the reversed dismantling of button cell is studied is very
Greatly, it is difficult to which structure and thermodynamics information to the active material in battery do further reversed dismantling research.
The production technology of packed battery up to tens steps easily influence the reliability of evaluation result.Packed battery preparation week
Phase is long, extends the development time of active material and pole piece technique.Meanwhile make packed battery need more electrode material,
The materials such as electrolyte, diaphragm increase the assessed cost of active material and manufacturing process.In addition, the layer of the pole piece of packed battery
Number is more, and capacity is generally relatively large, and temperature increases obvious during charging, discharging electric batteries, it will be apparent that fuel factor can also influence to comment
Survey the accuracy and reliability of result.On the other hand, packed battery structure is complicated, and reversely when analysis, battery dismantling is inconvenient.And
The battery core of packed battery is multilaminate coiled structure or lamination, is not easy to replacement pole piece, is unfavorable for reversed point in situ of battery
Analysis.
Summary of the invention
In view of the problems in the background art, the purpose of the present invention is to provide a kind of battery detecting structures, can be quasi-
True evaluation and test pole piece manufacturing process and Active Material Characteristics, while reducing cost and and facilitating reversed analysis in situ.
To achieve the goals above, the present invention provides a kind of battery detecting structures comprising battery unit and two folders
Plate.Battery unit includes packaging bag, first pole piece, an isolation film, second pole piece, first tab and one
A second tab.First pole piece, isolation film and the second pole piece are cascading and are housed in packaging bag, and the first pole piece and
The polarity of second pole piece is opposite.First tab is fixed on the first pole piece and extends to outside packaging bag, and the second tab is fixed on second
Pole piece simultaneously extends to outside packaging bag.Two clamping plates are respectively from sandwich packaging bag.
Beneficial effects of the present invention are as follows:
In battery detecting structure according to the present invention, since two electrodes of battery unit are respectively first pole piece
With second pole piece, therefore evaluate and test that the material expended needed for pole piece manufacturing process and Active Material Characteristics is few, at low cost, production
Period is short, meanwhile, the number of plies of cell internal is less, can reduce and generate heat build-up during the test, reduces fuel factor
Influence to evaluation result.The structure of battery unit is simple, dismantling is convenient, is easy to implement the replacement of the electrode of different conditions and takes
Match, helps to carry out reversed analysis in situ.In addition, the clamping action of two clamping plates can both make one first pole piece, institute
It states an isolation film and the contact of one second pole piece is good, guarantee that battery unit has good chemical property, it can also
It is locating in actual use with one first pole piece of true simulation, one isolation film and one second pole piece
Pressure environment, improve the reliability of evaluation and test.
Detailed description of the invention
Fig. 1 is a schematic diagram of battery detecting structure according to the present invention.
Fig. 2 is the schematic diagram of the battery unit of battery detecting structure according to the present invention.
Fig. 3 is the exploded view of an embodiment of battery detecting structure according to the present invention.
Fig. 4 is the cross-sectional view of battery detecting structure shown in Fig. 3.
Fig. 5 is the exploded view of another embodiment of battery detecting structure according to the present invention.
Fig. 6 is the cross-sectional view of battery detecting structure shown in fig. 5.
Wherein, the reference numerals are as follows:
1 battery unit, 141 second collector
11 packaging bag, 142 second coating
111 packaging film, 15 first tab
12 first pole piece, 16 second tab
121 first collector, 2 clamping plate
122 first coating, 3 buffer layer
13 isolation film, 4 bolt
14 second pole pieces
Specific embodiment
Carry out the battery detecting structure that the present invention will be described in detail with reference to the accompanying drawings.
Referring to figs. 1 to Fig. 6, battery detecting structure according to the present invention includes battery unit 1 and two clamping plates 2.Battery list
Member 1 include 11,14, first tabs 15 of the second pole piece of isolation film 13, one of the first pole piece 12, one of packaging bag and
One the second tab 16.First pole piece 12, isolation film 13 and the second pole piece 14 are cascading and are housed in packaging bag 11,
And first pole piece 12 and the second pole piece 14 polarity it is opposite.First tab 15 is fixed on the first pole piece 12 and extends to packaging bag 11
Outside, the second tab 16 is fixed on the second pole piece 14 and extends to outside packaging bag 11.Two clamping plates 2 are respectively from sandwich packaging bag
11。
When the system for needing to evaluate and test pole piece (following described pole piece is the general designation to the first pole piece 12 and the second pole piece 14)
Make technique and the active material (active material of such as positive polarity: cobalt acid lithium, LiFePO4, LiMn2O4 etc., the activity of negative polarity
Material: carbon, silicon etc.) characteristic when, active material to be evaluated is manufactured according to specific technique (can also be at the first pole piece 12
It is the second pole piece 14, depending on the property of material), and by first pole piece 12 and an isolation film 13 and second pole piece 14
It is sequentially overlapped together, is then placed in packaging bag 11, it is after injection electrolyte that packaging bag 11 is fully enclosed.Finally, with two
Clamping plate 2 is respectively from sandwich packaging bag 11, to prepare battery detecting structure of the invention.Finally, the battery that will be obtained
Detection structure is tested, to evaluate and test the manufacturing process of the active material and pole piece.
Specifically, multiple battery detecting structures of the invention can be prepared, carry out the system to pole piece by adjusting different parameters
The characteristic for making technique and active material is further evaluated and tested.For example, two battery detecting structures of preparation, and two batteries
The pole piece manufacturing process that detection structure uses is identical, in this manner it is possible to evaluate and test the characteristic of different activities material.Vice versa.
In battery detecting structure according to the present invention, since two electrodes of battery unit 1 are respectively first pole
Piece 12 and second pole piece 14, therefore the material for evaluating and testing consuming needed for pole piece manufacturing process and Active Material Characteristics is few, cost
It is low, fabrication cycle is short, meanwhile, the number of plies inside battery unit 1 is less, can reduce and generate heat build-up during the test, drop
Influence of the low thermal effect to evaluation result.The structure of battery unit 1 is simple, dismantling is convenient, is easy to implement the electrode of different conditions
Replacement and collocation, help to carry out analysis in situ reversed (for example, battery detecting structure of the invention is after a variety of tests,
The first pole piece 12 is disassembled out, the dependence tests such as impedance, capacity then are carried out to the first pole piece 12).In addition, the folder of two clamping plates 2
It is good that the effect of holding can both be such that one first pole piece 12, one isolation film 13 and one second pole piece 14 contacts
It is good, guarantee that battery unit 1 has good chemical property, it can also one first pole piece 12 of true simulation, described
One isolation film 13 and one second pole piece 14 locating pressure environment in actual use, improve the reliability of evaluation and test.
Further, referring to figure 5 and figure 6, battery unit 1 may also include another first pole piece 12, another isolation film
13 and another first tab 15.The second pole piece 14 of the isolation film 13, one of one first pole piece 12, one, another
Isolation film 13 and another first pole piece 12 are cascading.Another described first tab 15 be fixed on it is described another
First pole piece 12 simultaneously extends to outside packaging bag 11, and two the first tabs 15 are connected with each other.The battery detecting structure of the present embodiment
It can also be used for evaluation and test pole piece manufacturing process and active material.
Specifically, two kinds of battery detecting structure can be prepared, the first is first pole piece 12 and one
The double-deck pole piece structure (referring to Fig. 4) of second pole piece 14 composition, second is two the first pole pieces 12 and second pole piece 14
Three layers of pole piece structure (referring to Fig. 6) of composition, the first pole piece 12 of two kinds of battery detecting structures manufacture work using identical pole piece
Skill and active material compare the evaluation result of two kinds of different battery detecting structures, can further evaluate and test pole piece layer after test
The influence of several pairs of battery performances.
Certainly, the structure of four layers of pole piece or more can also be used in battery detecting structure of the invention, still, for the ease of battery
The production and dismantling of detection structure, battery detecting structure of the invention are preferably the double-deck pole piece structure above-mentioned or three layers of pole piece knot
Structure.
Referring to Fig. 3 to Fig. 6, the first pole piece 12 includes the first collector 121, and the first collector 121 only with the second pole
First coating 122 is arranged in the opposite surface of piece 14；Second pole piece 14 includes the second collector 141, and the second collector 141 only exists
Second coating 142 is arranged in the surface opposite with the first pole piece 12.That is, first coating 122 needs and 142 phase of second coating
Right, between the two there is only isolation film 13, such lithium ion is just able to achieve round-trip insertion and deintercalation.
First collector 121 and the second collector 141 are usually metal foil, depending on specific material is according to polarity, example
Such as when the first pole piece 12 is anode pole piece, the first collector 121 is aluminium foil, and aluminum foil thickness is more than or equal to 10 microns, the second collection
Fluid 141 is copper foil, and copper thickness is more than or equal to 4 microns.
When needing to detect the characteristic of certain active material, the materials such as the active material, conductive carbon, bonding agent can be pressed
Slurry is mixed and be made according to certain mass fraction, then the slurry is coated on the first collector 121 to form first and apply
After dry roll-in and the first pole piece 12 is made in layer 122；Then by first pole piece 12 and other component assemblings at electricity of the invention
Pond detection structure can evaluate and test out the characteristic of the active material after a variety of tests.When need to detect two kinds be respectively used to it is positive and negative
When the active material of electrode, both active materials can be respectively prepared to slurry, be then respectively coated on the first collector 121
To form first coating 122, coated on the second collector 141 to form second coating 142, to produce 12 He of the first pole piece
Second pole piece 14.First pole piece 12 and the second pole piece 14 and other component assemblings are at battery detecting structure of the invention, through excessive
The characteristic of both active materials can be evaluated and tested out after kind test.
That is, at least one of first coating 122 and second coating 142 include active material to be detected.
First tab 15 is integrally formed with the first collector 121 or seperated molding；Second tab 16 and the second collector 141
It is integrally formed or fission forms.First tab 15 for individual sheet body and can be welded to the first collector 121, can also directly by
First collector 121 is cut.Second tab 16 can be individual sheet body and to be welded to the second collector 141, can also be straight
It connects and is cut by the second collector 141.
Clamping plate 2 is by aluminium, stainless steel, polytetrafluoroethylene (PTFE), phenolic resin, organic glass, nitrocellulose plastics or unorganic glass
It is made.
The battery detecting structure further includes two buffer layers 3, and each buffer layer 3 is clamped in a clamping plate 2 and packaging bag 11
Between.Each buffer layer 3 can disperse the stress between clamping plate 2 and battery unit 1, and proof stress uniformly divides on 11 surface of packaging bag
Cloth, to make battery unit 1 that there is good chemical property.
Buffer layer 3 can be silica gel piece, sheet rubber, sponge or foamed plastics.
Alternatively, the padded coaming that buffer layer 3 may also comprise bumping bag and be housed in bumping bag, padded coaming packet
Include one or more of silicone oil, five fluorine propyl alcohol, N-Methyl pyrrolidone, paraffin oil, carbon dust, inorganic mineral powder.Inorganic mine
Object powder can be schmigel, TiO2Powder or BaSO4Powder.Preferably, padded coaming is less than or equal to 1 micron using partial size
Inorganic mineral powder.
Two clamping plates 2 can be fixedly connected by bolt 4.Bolt 4 can freely adjust clamping of the clamping plate 2 to battery unit 1
Power, while being also convenient for disassembling and install.
Packaging bag 11 is encapsulated by two layers of packaging film 111.Packaging film 111 can be aluminum plastic film, and two layers of aluminum plastic film can pass through
Hot sealing connection.
An embodiment of battery detecting structure of the invention is explained in detail below, for evaluating and testing the gram volume of cobalt acid lithium.
1) cobalt acid lithium and conductive carbon, bonding agent to be evaluated are mixed and made into positive slurry according to certain mass fraction respectively
Material；Then graphite, conductive carbon, bonding agent are mixed and made into negative electrode slurry according to certain mass fraction respectively.
2) anode sizing agent is coated on aluminium foil to form positive coating, anode pole piece (this is made after roll-in
When, using anode pole piece as the first pole piece 12)；Negative electrode slurry is coated on copper foil to form cathode coating, after roll-in
A cathode pole piece (at this point, using cathode pole piece as the second pole piece 14) is made.
3) then soldering polar ear (i.e. the first tab 15 and the second tab 16) on anode pole piece and cathode pole piece respectively will
Anode pole piece, isolation film and cathode pole piece stack, and guarantee that positive coating and cathode coating are opposite with isolation film.
4) anode pole piece stacked, isolation film and cathode pole piece are put into packaging bag 11, pour into electrolyte and incited somebody to action
11 hot sealing of packaging bag, to form battery unit 1.
5) successively by 2, buffer layers 3 of a clamping plate, battery unit 1, another buffer layer 3 and another clamping plate 2
It stacks, then supervises two clamping plates 2 with bolt 4 and fasten, to obtain a battery detecting structure.
6) charge-discharge test is carried out to obtained battery detecting structure, and obtains charging and discharging curve, to measure cobalt acid lithium
Gram volume.
Claims (10)
1. a kind of battery detecting structure, which is characterized in that including battery unit (1) and two clamping plates (2)；
Battery unit (1) includes packaging bag (11), first pole piece (12), an isolation film (13), second pole piece
(14), first tab (15) and second tab (16)；
First pole piece (12), isolation film (13) and the second pole piece (14) are cascading and are housed in packaging bag (11), and
The polarity of first pole piece (12) and the second pole piece (14) is opposite；
First tab (15) is fixed on the first pole piece (12) and extends to packaging bag (11) outside, and the second tab (16) is fixed on second
Pole piece (14) simultaneously extends to packaging bag (11) outside；
Two clamping plates (2) are respectively from sandwich packaging bag (11).
2. battery detecting structure according to claim 1, which is characterized in that
Battery unit (1) further includes another first pole piece (12), another isolation film (13) and another first tab
(15)；
One first pole piece (12), an isolation film (13), second pole piece (14), another isolation film (13) and
Another first pole piece (12) is cascading；
Another described first tab (15) is fixed on another described first pole piece (12) and extends to packaging bag (11) outside, and
Two the first tabs (15) are connected with each other.
3. battery detecting structure according to claim 1 or 2, which is characterized in that
First pole piece (12) includes the first collector (121), and the first collector (121) is only opposite with the second pole piece (14)
First coating (122) are arranged in surface；
Second pole piece (14) includes the second collector (141), and the second collector (141) is only opposite with the first pole piece (12)
Second coating (142) are arranged in surface.
4. battery detecting structure according to claim 3, which is characterized in that first coating (122) and second coating (142)
At least one of include active material to be detected.
5. battery detecting structure according to claim 3, which is characterized in that
First tab (15) is integrally formed with the first collector (121) or seperated molding；
Second tab (16) is integrally formed with the second collector (141) or seperated molding.
6. battery detecting structure according to claim 1, which is characterized in that clamping plate (2) is by aluminium, stainless steel, polytetrafluoroethyl-ne
Alkene, phenolic resin, organic glass, nitrocellulose plastics or unorganic glass are made.
7. battery detecting structure according to claim 1, which is characterized in that the battery detecting structure further includes two slow
It rushes layer (3), each buffer layer (3) is clamped between a clamping plate (2) and packaging bag (11).
8. battery detecting structure according to claim 7, which is characterized in that
Buffer layer (3) is silica gel piece, sheet rubber, sponge or foamed plastics；Or
Buffer layer (3) includes bumping bag and the padded coaming that is housed in bumping bag, and padded coaming includes silicone oil, five fluorine third
One or more of alcohol, N-Methyl pyrrolidone, paraffin oil, carbon dust, inorganic mineral powder.
9. battery detecting structure according to claim 1, which is characterized in that two clamping plates (2) connect by the way that bolt (4) are fixed
It connects.
10. battery detecting structure according to claim 1, which is characterized in that packaging bag (11) is by two layers of packaging film (111)
It encapsulates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710898032.1A CN109596982A (en) | 2017-09-28 | 2017-09-28 | battery detection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710898032.1A CN109596982A (en) | 2017-09-28 | 2017-09-28 | battery detection structure |
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| Publication Number | Publication Date |
|---|---|
| CN109596982A true CN109596982A (en) | 2019-04-09 |
Family
ID=65955452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710898032.1A Pending CN109596982A (en) | 2017-09-28 | 2017-09-28 | battery detection structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617907A (en) * | 2019-09-04 | 2019-12-27 | 上海理工大学 | Outer surface pressing device of soft package battery and pressure testing method thereof |
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