CN109904538A - Lithium ion battery and its internal current distribution detecting circuit - Google Patents
Lithium ion battery and its internal current distribution detecting circuit Download PDFInfo
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- CN109904538A CN109904538A CN201910032661.5A CN201910032661A CN109904538A CN 109904538 A CN109904538 A CN 109904538A CN 201910032661 A CN201910032661 A CN 201910032661A CN 109904538 A CN109904538 A CN 109904538A
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 56
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 238000009826 distribution Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 20
- 239000002985 plastic film Substances 0.000 claims description 20
- 229920006255 plastic film Polymers 0.000 claims description 20
- 210000005069 ears Anatomy 0.000 claims description 5
- 230000004308 accommodation Effects 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 abstract description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 230000005611 electricity Effects 0.000 description 6
- 239000007767 bonding agent Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000006258 conductive agent Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000011267 electrode slurry Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000004513 sizing Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002120 nanofilm Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
-
- 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
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The application provides a kind of lithium ion battery and its internal current distribution detecting circuit.The inside lithium ion cell current distribution detection method and detection circuit include lithium ion battery, cell tester and multiple current detecting units.The lithium ion battery includes multiple positive plates and multiple negative electrode tabs, and each positive plate connects an anode ear, and each negative electrode tab connects a negative electrode lug.The cell tester controls the charge and discharge process of the lithium ion battery.Each current detecting unit connects with a tab sense, for detecting the electric current of each positive plate or each negative electrode tab.The multiple current detecting unit in the circuit of measurement inside lithium ion cell interlayer current distribution provided by the present application by detect each tab electric current detection battery on the line interlayer current distributions.
Description
Technical field
This application involves power source technical fields, more particularly to a kind of lithium ion battery and its internal current distribution inspection
Slowdown monitoring circuit.
Background technique
More stringent requirements are proposed for energy density of the development of electric car to lithium ion battery.However, battery is enlarged
The uneven distribution of electric current is more obvious afterwards, causes the energy density of battery to be lost serious.
In order to study the distribution of inside lithium ion cell electric current, currently existing scheme is that lithium ion battery is designed to have ten
The battery of an a positive cathode.The electric current flowed out by a multi-channel measurement unit measurement from each anode.Such scheme
Current distribution in battery face can only be detected, the interlayer current distribution of battery cannot be detected.
Summary of the invention
Based on this, it is necessary to aiming at the problem that existing scheme cannot detect the interlayer current distribution of battery, provide a kind of lithium
Ion battery and its internal current distribution detecting circuit.
A kind of inside lithium ion cell current distribution detection circuit, comprising:
Lithium ion battery, including multiple positive plates, multiple negative electrode tabs, multiple anode ears and multiple negative electrode lugs, it is the multiple
Positive plate and the multiple negative electrode tab interval are arranged, and each positive plate connects an anode ear, and each negative electrode tab connects
Connect a negative electrode lug；
Cell tester is electrically connected with the lithium ion battery, for controlling the lithium ion battery charge and discharge process；With
And
Multiple current detecting units, each current detecting unit connects with an anode ear or a negative electrode lug sense, for examining
Survey the electric current of each positive plate or each negative electrode tab.
In one of the embodiments, further include:
Multiple diaphragms, each diaphragm are set between the positive plate and the negative electrode tab, and the length of the diaphragm is big
In the length of the negative electrode tab, the length of the diaphragm is greater than the length of the positive plate.
The lithium ion battery in one of the embodiments, further include:
Aluminum plastic film have an accommodation space, the aluminum plastic film by the multiple positive plate, the multiple negative electrode tab and
The multiple diaphragm receptacle is in the storage space, wherein the diaphragm extend direction, the both ends of the diaphragm with it is described
Aluminum plastic film contact.
In one of the embodiments, further include:
Multiple electric current clips, each electric current clip are electrically connected with an anode ear or a negative electrode lug, an electric current
Clip is connect by a current feed and a current detecting unit sense.
The length and diameter of every current feed is equal in one of the embodiments,.
The internal resistance of the current feed accounts for the positive plate internal resistance or the negative electrode tab internal resistance in one of the embodiments,
Ratio be 0%-1%.
The multiple current detecting unit is that fibre optic current sensor or Hall current pass in one of the embodiments,
Sensor.
In one of the embodiments, when the multiple current detecting unit is Hall current sensor, the inspection
Slowdown monitoring circuit further include:
Power supply unit, using the mode of supplying power with double circuit, for providing electric energy to the Hall sensor.
The power supply unit includes positive terminal, negative terminal and ground terminal in one of the embodiments,；
The current detecting unit includes first terminal, Second terminal and third terminal；The positive terminal and described the
The electrical connection of one terminal, the negative terminal are electrically connected with the Second terminal, and the ground terminal is electrically connected with the third terminal
It connects.
A kind of lithium ion battery, comprising:
Multiple positive plates；
Multiple negative electrode tabs are arranged with the multiple positive plate interval；
Multiple anode ears, each anode ear are electrically connected with a positive plate；
Multiple negative electrode lugs, each negative electrode lug are electrically connected with a negative electrode tab；And
Multiple diaphragms, each diaphragm are set between the positive plate and the negative electrode tab, and the length of the diaphragm is big
In the length of the negative electrode lug, the length of the diaphragm is greater than the length of the anode ear.
The application provides a kind of lithium ion battery and its internal current distribution detecting circuit.The inside lithium ion cell electricity
Flow distribution detection method and detection circuit include lithium ion battery, cell tester and multiple current detecting units.The lithium from
Sub- battery includes multiple positive plates and multiple negative electrode tabs, and each positive plate connects an anode ear, and each negative electrode tab connects
One negative electrode lug.The cell tester controls the lithium ion battery charge and discharge process.Each current detecting unit with
One tab sense connects, for detecting the electric current of each positive plate or each negative electrode tab.Measurement lithium ion battery provided by the present application
The multiple current detecting unit in the circuit of internal interlayer current distribution by detect each tab electricity on the line
Flow into and detect the interlayer current distributions of battery.
Detailed description of the invention
Fig. 1 is a kind of inside lithium ion cell current distribution detection circuit figure that the application one embodiment provides；
Fig. 2 is a kind of inside lithium ion cell current distribution detection circuit figure that the application one embodiment provides；
Fig. 3 is a kind of power supply mode connection figure for cell tester that the application one embodiment provides；
Fig. 4 is a kind of lithium ion battery structure figure that the application one embodiment provides.
Main element drawing reference numeral explanation
Inside lithium ion cell current distribution detection circuit 100
Power supply unit 10
Positive terminal 11
Negative terminal 12
Ground terminal 13
Current detecting unit 20
First terminal 21
Second terminal 22
Third terminal 23
Forth terminal 24
Electric current clip 30
Current feed 31
Lithium ion battery 40
Positive plate 41
Negative electrode tab 42
Tab 43
Anode ear 431
Negative electrode lug 432
Diaphragm 44
Aluminum plastic film 45
Accommodation space 451
Cell tester 50
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing to the application
Specific embodiment be described in detail.Many details are explained in the following description in order to fully understand this Shen
Please.But the application can be implemented with being much different from other way described herein, those skilled in the art can be not
Similar improvement is done in the case where violating the application intension, therefore the application is not limited by following public specific implementation.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Referring to Figure 1, the application one embodiment provides a kind of inside lithium ion cell current distribution detection circuit 100.
The detection circuit 100 includes lithium ion battery 40, cell tester 50 and multiple current detecting units 20.
The lithium ion battery 40 includes multiple positive plates 41, multiple negative electrode tabs 42 and multiple tabs 43.The multiple pole
Ear 43 includes multiple anode ears 431 and multiple negative electrode lugs 432.Each positive plate 41 connects an anode ear 431.Each institute
It states negative electrode tab 42 and connects a negative electrode lug 432.The battery electrical measuring instrument 50 is electrically connected with the lithium ion battery 40, for controlling
40 charge and discharge process of lithium ion battery.For example, the battery tester 50 can control electric current or electricity in charge and discharge process
The size of pressure.Each current detecting unit 20 in the multiple current detecting unit 20 connects with a sense of tab 43.Institute
Stating multiple current detecting units 20 can be fibre optical sensor or Hall current sensor.The multiple current detecting unit 20
Detection accuracy be 1%.The multiple current detecting unit 20 is used to detect the electricity of each positive plate 41 or each negative electrode tab 42
Stream.
The preparation method of the positive plate 41 includes by positive active material, positive solvent, positive bonding agent and anode
Conductive agent is put into blender and is stirred, and anode sizing agent first product is made.The anode sizing agent first product drying, roll pressing obtain
The anode collection plate 41.The preparation of the negative electrode tab 42 include by negative electrode active material, cathode solvent, cathode bonding agent and
Cathode conductive agent is put into blender and is stirred, and negative electrode slurry first product is made.The negative electrode slurry first product drying, roll-in
The negative electrode tab 42 is made.The material of the multiple tab 43 can be aluminium flake or nickel sheet or nickel plating copper sheet.Each positive plate 41
Pass through welded connecting between each anode ear 431.Pass through welded connecting between each negative electrode tab 42 and each negative electrode lug 432.
In the present embodiment, the inside lithium ion cell current distribution detection circuit 100 includes lithium ion battery 40, battery
Tester 50 and multiple current detecting units 30.The lithium ion battery 40 includes multiple positive plates 41 and multiple negative electrode tabs 42,
Each positive plate 41 connects an anode ear 431, and each negative electrode tab 42 connects a negative electrode lug 432.The battery testing
Instrument 50 is for controlling 40 charge and discharge process of lithium ion battery.Each current detecting unit 20 and a tab 43 are felt
It connects, for detecting the electric current of each positive plate 41 or each negative electrode tab 42.Measurement inside lithium ion cell layer provided by the present application
Between current distribution circuit 100 in the multiple current detecting unit 20 by detect each tab 43 electricity on the line
Flow into and obtain the interlayer current distributions of battery.
Refer to Fig. 2, in one embodiment, the positive plate 41 is arranged with the negative electrode tab 42 interval, the lithium from
Sub- battery 40 further includes multiple diaphragms 44.
Each diaphragm 44 is set between the positive plate 41 and the negative electrode tab 42.And the length of the diaphragm 44
Greater than the length of the negative electrode tab 42, the length of the diaphragm 44 is greater than the length of the positive plate 41.The diaphragm 44 is height
Molecular film has microcellular structure.Lithium ion can be by the microcellular structure, but electronics cannot pass through the microcellular structure.
The setting of the diaphragm 44 can guarantee insulated from each other between each positive plate 41 and each negative electrode tab 42.
In one embodiment, the lithium ion battery 40 further includes aluminum plastic film 45.
The aluminum plastic film 45 has an accommodation space 451.The aluminum plastic film 45 is by the multiple positive plate 41, described more
A negative electrode tab 42 and the multiple diaphragm 44 are accommodated in the storage space 451.Wherein, in the side that the diaphragm 44 extends
To the both ends of the diaphragm 44 are contacted with the aluminum plastic film 45.The extension of the i.e. described diaphragm 44 is close to the aluminum plastic film 45
At edge sealing.
In the present embodiment, the setting of the diaphragm 44 can guarantee between each positive plate 41 and each negative electrode tab 42 that
This insulation.At the extension of the diaphragm 44 to 45 sealing edge of aluminum plastic film.Each tab 43 can be effectively prevented
It is interconnected before the aluminum plastic film 45 stretching.
In one embodiment, the inside lithium ion cell current distribution detection circuit 100 further includes multiple electric current folders
Son 30.
Each electric current clip 30 is electrically connected with a tab 43.One electric current clip 30 connects a current feed
31.It is connect between one electric current clip 30 and a current detecting unit 20 by a sense of current feed 31.
The length and diameter of every current feed 31 is equal.The internal resistance of the current feed 31 accounts for the positive plate 41 or negative electrode tab
42 ratio is 0-1%.For example, the diameter of current feed 31 described in each is set as 4mm, length is 66cm.When the electricity
When the material for flowing lead 31 is copper, since the resistivity of copper is 0.0175 Ω mm2/ m, therefore each electric current can be calculated and drawn
The resistance of line is 0.92m Ω.The magnitude of the internal resistance about 100m Ω of the lithium ion battery 40, the internal resistance of the current feed 31 account for
The ratio of the positive plate 41 or negative electrode tab 42 is 0.92%.
In the present embodiment, the length and diameter of the current feed 31 is identical.And the length of the current feed 31 is most
Measure 40 interlayer electric current of lithium ion battery described in the short resistance differentia influence that can be effectively prevented between each current feed 31
The accuracy of distribution.
Fig. 3 is referred to, in one embodiment, when the detection unit 20 is Hall current sensor, the inspection
Slowdown monitoring circuit further includes power supply unit 10.
The power supply unit 10 is using the mode that supplies power with double circuit, for providing electric energy to the Hall sensor.The power supply
Device 10 is using the mode that supplies power with double circuit.The power supply unit 10 includes positive terminal 11, negative terminal 12 and ground terminal 13.Institute
Stating current detecting unit 20 includes first terminal 21, Second terminal 22, third terminal 23 and forth terminal 24.The positive terminal
11 are electrically connected with the first terminal 21, and the negative terminal 12 is electrically connected with the Second terminal 22, the ground terminal 13
It is electrically connected with the third terminal 23.The forth terminal 24 is signal output end.The forth terminal 24 passes through load and institute
The electrical connection of ground terminal 13 is stated, for guaranteeing that output voltage signal is 0 when detecting electric current and being 0.The power supply unit 10 uses
The mode of supplying power with double circuit ensures the reliability of power supply.
Fig. 4 is referred to, a kind of lithium ion battery 40 is provided in the application one embodiment.The lithium ion battery 40 includes
A positive plate 41, multiple negative electrode tabs 42, multiple tabs 43 and multiple diaphragms 44, the multiple tab 43 include 431 He of anode ear
Negative electrode lug 432.
The multiple negative electrode tab 42 is arranged with the multiple positive plate 41 interval.Each anode ear 431 and an institute
State the electrical connection of positive plate 41.Each negative electrode lug 432 is electrically connected with a negative electrode tab 42.Each diaphragm 44 is arranged
Between the positive plate 41 and the negative electrode tab 42.And the length of the diaphragm 44 is greater than the length of the negative electrode tab 42.Institute
The length for stating diaphragm 44 is greater than the length of the positive plate 41.As one embodiment, the length of the diaphragm 44 is greater than described
The length of negative electrode tab 42, the length of the negative electrode tab 42 are greater than the length of the positive plate 41.
The preparation method of the positive plate 41 includes by positive active material, positive solvent, positive bonding agent and anode
Conductive agent is put into blender and is stirred, and anode sizing agent first product is made.The anode sizing agent first product drying, roll pressing obtain
The anode collection plate 41.The preparation of the negative electrode tab 42 include by negative electrode active material, cathode solvent, cathode bonding agent and
Cathode conductive agent is put into blender and is stirred, and negative electrode slurry first product is made.The negative electrode slurry first product drying, roll-in
The negative electrode tab 42 is made.The material of the multiple tab 43 can be aluminium flake or nickel sheet.Each positive plate 41 and each anode
Pass through welded connecting between ear 431.Pass through welded connecting between each negative electrode tab 42 and each negative electrode lug 432.The diaphragm 44
For macromolecule membrane, there is microcellular structure.Lithium ion can be by the microcellular structure, but electronics cannot pass through the micropore knot
Structure.The setting of the diaphragm 44 can guarantee insulated from each other between each positive plate 41 and each negative electrode tab 42.
In the present embodiment, the lithium ion battery 40 is electrically connected anode ear 431 on each positive plate 41, and every
Negative electrode lug 432 is electrically connected in a negative electrode tab 42.Such design scheme can by with the anode ear 431 or described negative
432 series current detection device of tab or other measuring physicals, and then realize and detect in the lithium ion battery 40
The purpose of portion's physical quantity distribution.By the setting of the diaphragm 44 can guarantee each positive plate 41 and each negative electrode tab 42 it
Between it is insulated from each other.
In one embodiment, the lithium ion battery 40 further includes aluminum plastic film 45.In the multiple positive plate 41, described
Aluminum plastic film 45 is formed by punch forming process in multiple negative electrode tabs 42 and the multiple diaphragm 44.Extend in the diaphragm 44
Direction, the both ends of the diaphragm 44 are contacted with the aluminum plastic film 45.The extension of the i.e. described diaphragm 44 is to the aluminum plastic film
At 45 sealing edges.
In the present embodiment, the setting of the diaphragm 44 can guarantee between each positive plate 41 and each negative electrode tab 42 that
This insulation.At the extension of the diaphragm 44 to 45 sealing edge of aluminum plastic film.Each tab 43 can be effectively prevented
It is interconnected before the aluminum plastic film 45 stretching.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to claim therefore cannot be interpreted as.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of inside lithium ion cell current distribution detection circuit (100) characterized by comprising
Lithium ion battery (40), including multiple positive plates (41), multiple negative electrode tabs (42), multiple anode ears (431) and multiple negative
Tab (432), the multiple positive plate (41) and the multiple negative electrode tab (42) interval are arranged, and each positive plate (41) is even
An anode ear (431) is connect, each negative electrode tab (42) connects a negative electrode lug (432)；
Cell tester (50) is electrically connected with the lithium ion battery (40), for controlling the lithium ion battery (40) charge and discharge
Electric process；And
Multiple current detecting units (20), each current detecting unit (20) and an anode ear (431) or a negative electrode lug
(432) sense connects, for detecting the electric current of each positive plate (41) or each negative electrode tab (42).
2. detection circuit (100) according to claim 1, which is characterized in that further include:
Multiple diaphragms (44), each diaphragm (44) are set between the positive plate (41) and the negative electrode tab (42), and described
The length of diaphragm (44) is greater than the length of the negative electrode tab (42), and the length of the diaphragm (44) is greater than the positive plate (41)
Length.
3. detection circuit (100) according to claim 2, which is characterized in that the lithium ion battery (40) further include:
Aluminum plastic film (45), has an accommodation space (451), and the aluminum plastic film (45) is by the multiple positive plate (41), described
Multiple negative electrode tabs (42) and the multiple diaphragm (44) are accommodated in the storage space (451), wherein in the diaphragm (44)
The both ends in the direction of extension, the diaphragm (44) are contacted with the aluminum plastic film (45).
4. detection circuit (100) according to claim 1, which is characterized in that further include:
Multiple electric current clips (30), each electric current clip (30) are electrically connected with an anode ear (431) or a negative electrode lug (432)
It connects, an electric current clip (30) is connect by a current feed (31) and current detecting unit (20) sense.
5. detection circuit (100) according to claim 4, which is characterized in that the length of every current feed (31)
It is equal with diameter.
6. detection circuit according to claim 5, which is characterized in that the internal resistance of the current feed (31) accounts for the anode
The ratio of piece (41) internal resistance or the negative electrode tab (42) internal resistance is 0%-1%.
7. detection circuit (100) according to claim 1, which is characterized in that the multiple current detecting unit (20) is
Fibre optic current sensor or Hall current sensor.
8. the detection circuit according to any one of claim 7 (100), which is characterized in that when the multiple current detecting
When unit (20) is Hall current sensor, the detection circuit (100) further include:
Power supply unit (10), using the mode of supplying power with double circuit, for providing electric energy to the Hall sensor.
9. detection circuit (100) according to claim 8, which is characterized in that the power supply unit (10) includes positive terminal
Sub (11), negative terminal (12) and ground terminal (13)；
The current detecting unit (20) includes first terminal (21), Second terminal (22) and third terminal (23)；The anode
Terminal (11) is electrically connected with the first terminal (21), and the negative terminal (12) is electrically connected with the Second terminal (22), institute
Ground terminal (13) is stated to be electrically connected with the third terminal (23).
10. a kind of lithium ion battery (40) characterized by comprising
Multiple positive plates (41)；
Multiple negative electrode tabs (42) are spaced with the multiple positive plate (41) and are arranged；
Multiple anode ears (431), each anode ear (431) are electrically connected with a positive plate (41)；
Multiple negative electrode lugs (432), each negative electrode lug (432) are electrically connected with a negative electrode tab (42)；And
Multiple diaphragms (44), each diaphragm (44) are set between the positive plate (41) and the negative electrode tab (42), and described
The length of diaphragm (44) is greater than the length of the negative electrode lug (432), and the length of the diaphragm (44) is greater than the anode ear (431)
Length.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032661.5A CN109904538A (en) | 2019-01-14 | 2019-01-14 | Lithium ion battery and its internal current distribution detecting circuit |
| PCT/CN2019/073222 WO2020147146A1 (en) | 2019-01-14 | 2019-01-25 | Lithium ion battery and internal current distribution detection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032661.5A CN109904538A (en) | 2019-01-14 | 2019-01-14 | Lithium ion battery and its internal current distribution detecting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN109904538A true CN109904538A (en) | 2019-06-18 |
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|---|---|---|---|
| CN201910032661.5A Pending CN109904538A (en) | 2019-01-14 | 2019-01-14 | Lithium ion battery and its internal current distribution detecting circuit |
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| CN (1) | CN109904538A (en) |
| WO (1) | WO2020147146A1 (en) |
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| CN112240986A (en) * | 2019-07-18 | 2021-01-19 | 万向一二三股份公司 | Lithium precipitation and uniformity evaluation method for large-size soft package lithium ion battery |
| CN113363602A (en) * | 2021-05-24 | 2021-09-07 | 冯凯 | Battery module and battery management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114113229B (en) * | 2021-11-11 | 2024-02-09 | 合肥国轩高科动力能源有限公司 | Sampling inspection method for aluminum plastic film |
| 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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| WO2020147146A1 (en) | 2020-07-23 |
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