CN108417741A - A kind of new hull material structure that can detect lithium battery casing internal pressure - Google Patents
A kind of new hull material structure that can detect lithium battery casing internal pressure Download PDFInfo
- Publication number
- CN108417741A CN108417741A CN201810111484.5A CN201810111484A CN108417741A CN 108417741 A CN108417741 A CN 108417741A CN 201810111484 A CN201810111484 A CN 201810111484A CN 108417741 A CN108417741 A CN 108417741A
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- China
- Prior art keywords
- battery
- internal pressure
- piezoelectric
- lithium battery
- casing internal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 62
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 24
- 229910000838 Al alloy Inorganic materials 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 8
- 239000012774 insulation material Substances 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction 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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of new hull material structures that can detect lithium battery casing internal pressure to be coated in piezoelectric material on the surface of aluminum hull material according to the principle for the piezoelectric effect that piezoelectric material generates；Simultaneously after battery modules molding, during battery normal use, because aerogenesis will generate extruding force to shell inside battery core, the extruding force will cause case material outer surface to assemble positive charge, BMS systems can calculate and reflect the pressure condition that inside battery receives by the voltage data between collecting test housing exterior walls and inner wall.
Description
Technical field
The present invention relates to the technical field of novel materials more particularly to one kind that make lithium battery casing capable of detecting lithium battery
The new hull material structure of enclosure interior pressure.
Background technology
Lithium battery casing material uses metallic aluminum material substantially at present, and it is higher strong to be on the one hand that aluminum alloy materials have
Degree, meets the security performance of battery, is on the other hand to belong to light-weight metal, compared to other metals since aluminum metal density is low
Material can effectively promote the energy density of battery as battery case.
With the continuous development of cell manufacturing techniques, existing market is more and more harsh to the design requirement of battery, and battery exists
The various aspects such as security performance, energy density are promoted.Battery recycle, overcharge, cross put, thermal runaway when battery
It is internal can aerogenesis, cause battery case pressure to increase.Cell internal pressure is a kind of means for characterizing battery status, in battery
Monitoring the pressure change of inside battery in charge and discharge process in real time has contributed to the state of electrolytic cell, helps BMS systems to battery
Security performance be monitored.
The test relative difficult of cell internal pressure is unfolded at present, part invention is incuded by being placed inside battery core
The form of device is detected the pressure of inside battery, and which needs to increase inductor in inside battery, and needs from electricity
P-wire is drawn inside pond, this method is added inductor in inside battery and p-wire is added, and is easy to cause the short circuit of battery, together
When to battery later stage sealing cause difficulty, be only capable of as single battery core test cell internal pressure subjects, can not
Volume production is carried out, it is even more impossible to meet the test and detection requirement of supporting BMS systems to cell internal pressure.
Invention content
Technical problems based on background technology, the present invention, which proposes one kind, can detect lithium battery casing internal pressure
New hull material structure.
A kind of new hull material structure that can detect lithium battery casing internal pressure proposed by the present invention, Al alloy shell
The inner surface of body is coated with insulation material layer, and outer surface is coated with piezoelectric material layer, and piezoelectric material layer is far from Al-alloy casing
Side be covered with aluminium alloy protective layer.
Preferably, insulation material layer uses high molecule plastic or ceramics.
Preferably, piezoelectric material layer uses piezoelectric ceramics.
The present invention starts with from battery case body material, proposes that a kind of new hull material, this kind of new material have single side
Conductive, single-sided insulation performance, while conductive side utilizes piezoelectric material properties by interior spraying piezoelectric material：Pressure and band
The presentation linear relationship of electricity detects the pressure condition of inside battery by detecting hull outside carried charge, is supervised for BMS systems
The pressure for surveying inside battery provides means of testing.
By using the case material of this type, one side enclosure interior is equipped with insulating layer, and battery core is being assembled into shell mistake
Reduce the risk of internal short-circuit in journey, while the use of battery core bagging can be saved, reduces the weight of battery, improve energy
Density；It is equipped with piezoelectric material layer in another aspect material, can be the band of battery core surface of shell by the pressure conversion inside battery core
Electricity, to intuitively become the stressing conditions revealed inside battery core；System monitoring battery status is managed for battery later stage module BMS
It provides and supports, improve the security performance of battery.
Description of the drawings
Fig. 1 is a kind of new hull material structure signal that can detect lithium battery casing internal pressure proposed by the present invention
Figure；
Fig. 2 is piezoelectric material operating diagram；
Fig. 3 is case material operating diagram shown in Fig. 1.
Specific implementation mode
Referring to Fig.1, a kind of new hull material structure that can detect lithium battery casing internal pressure proposed by the present invention,
The inner surface of Al-alloy casing 1 is coated with insulation material layer 2, and outer surface is coated with piezoelectric material layer 3, and piezoelectric material layer 3 is remote
Side from Al-alloy casing 1 is covered with aluminium alloy protective layer 4.
In the case material structure, for piezoelectric material layer in the case where being under pressure, two in piezoelectric material layer are opposite
Surface the charge of opposite polarity will occur, and with the increase of pressure, the amount of charge of piezoelectric material layer surface presents linear
Relationship increases.Using the characteristic, the pressure that inside battery can be monitored for the BMS of battery provides support, by the pressure of inside battery
Power detection is converted to the charge detection on battery case.
In present embodiment, the inner surface of inner surface, that is, battery case of Al-alloy casing 1 coats insulation material layer 2, can
Battery core bagging is substituted, occurs internal short-circuit problem when preventing battery core from entering shell, reduces the weight of battery, promote the energy density of battery.
Specifically, insulation material layer 2 uses high molecule plastic either ceramics or other insulating materials.
In present embodiment, battery case is used as body supports using Al-alloy casing 1, and Al-alloy casing 1 is existing lithium
The main material of battery hard shell battery, using the lightweight of aluminium alloy, the not only intensity of guaranteed battery case, but also can guarantee battery
Lightweight.In present embodiment, increase by one layer of aluminium alloy protective layer 4 in the outer layer of piezoelectric material layer 3, in the intensity for ensureing battery
On the basis of, the protection to piezoelectric material layer is also provided.
In present embodiment, by taking the piezoelectric ceramics in piezoelectric material as an example, to the shells new material for testing
The operation principle of enclosure interior pressure is illustrated.
Piezoelectric ceramics is a kind of new function material, due to it is high with the coefficient of coup, performance is stable, working range is wide,
The features such as being easy to batch production, has application in the field for being almost related to the power and energies such as sound, light, electricity, heat at present.
There is piezoelectric effect by process treated the piezoceramic material that polarizes, i.e., the pressure suffered by piezoelectric ceramics with answer
Voltage be it is proportional, as shown in Figure 2.
In Fig. 2, applies a downward pressure F on piezoceramic material surface, the lattice of material is caused to deform upon；
The material upper surface of compression will generate negative electrical charge Qx, and lower surface will generate the positive charge Qx of equivalent；In the case where pressure is certain,
The carried charge of material surface and the size direct ratio by pressure pressure.
That is Qx=kF, k is piezoelectricity Changshu in formula, is the attribute value of material.
By above formula, according to the carried charge of material surface can reverse push export the stressing conditions of material surface；I.e.
F=Qx/k
Further：Storeroom voltage can be expressed as：
The stressing conditions of material surface can be calculated by measuring the voltage at material both ends.
In the case material structure provided with reference to Fig. 3, present embodiment, according to the original for the piezoelectric effect that piezoelectric material generates
Piezoelectric material is coated in the surface of aluminum hull material by reason；Simultaneously after battery modules molding, during battery normal use, electricity
For core inner because aerogenesis will generate extruding force to shell, which will cause case material outer surface to assemble positive charge, BMS systems
The pressure feelings that inside battery receives can be calculated and reflect by the voltage data between collecting test housing exterior walls and inner wall
Condition.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of new hull material structure that can detect lithium battery casing internal pressure, which is characterized in that Al-alloy casing
(1) inner surface is coated with insulation material layer (2), and outer surface is coated with piezoelectric material layer (3), and piezoelectric material layer (3) is separate
The side of Al-alloy casing (1) is covered with aluminium alloy protective layer (4).
2. can detect the new hull material structure of lithium battery casing internal pressure as described in claim 1, feature exists
In insulation material layer (2) uses high molecule plastic or ceramics.
3. can detect the new hull material structure of lithium battery casing internal pressure as described in claim 1, feature exists
In piezoelectric material layer (3) uses piezoelectric ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810111484.5A CN108417741A (en) | 2018-02-05 | 2018-02-05 | A kind of new hull material structure that can detect lithium battery casing internal pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810111484.5A CN108417741A (en) | 2018-02-05 | 2018-02-05 | A kind of new hull material structure that can detect lithium battery casing internal pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108417741A true CN108417741A (en) | 2018-08-17 |
Family
ID=63126882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810111484.5A Pending CN108417741A (en) | 2018-02-05 | 2018-02-05 | A kind of new hull material structure that can detect lithium battery casing internal pressure |
Country Status (1)
| Country | Link |
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| CN (1) | CN108417741A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418651A (en) * | 2021-05-20 | 2021-09-21 | 同济大学 | Method and structure for detecting internal pressure of lithium ion power battery based on piezoelectric sensing |
| CN113533977A (en) * | 2021-05-26 | 2021-10-22 | 同济大学 | Method for detecting internal reaction parameters of lithium ion power battery |
| WO2021220198A1 (en) * | 2020-04-29 | 2021-11-04 | Rai Strategic Holdings, Inc. | Piezo sensor for a power source |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120286719A1 (en) * | 2011-05-12 | 2012-11-15 | Samsung Sdi Co., Ltd. | Secondary battery |
| JP2016085851A (en) * | 2014-10-24 | 2016-05-19 | トヨタ自動車株式会社 | Method for hermetically sealing battery case |
| CN206388814U (en) * | 2017-01-20 | 2017-08-08 | 宁德时代新能源科技股份有限公司 | Secondary cell |
-
2018
- 2018-02-05 CN CN201810111484.5A patent/CN108417741A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120286719A1 (en) * | 2011-05-12 | 2012-11-15 | Samsung Sdi Co., Ltd. | Secondary battery |
| JP2016085851A (en) * | 2014-10-24 | 2016-05-19 | トヨタ自動車株式会社 | Method for hermetically sealing battery case |
| CN206388814U (en) * | 2017-01-20 | 2017-08-08 | 宁德时代新能源科技股份有限公司 | Secondary cell |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021220198A1 (en) * | 2020-04-29 | 2021-11-04 | Rai Strategic Holdings, Inc. | Piezo sensor for a power source |
| US11839240B2 (en) | 2020-04-29 | 2023-12-12 | Rai Strategic Holdings, Inc. | Piezo sensor for a power source |
| CN113418651A (en) * | 2021-05-20 | 2021-09-21 | 同济大学 | Method and structure for detecting internal pressure of lithium ion power battery based on piezoelectric sensing |
| CN113533977A (en) * | 2021-05-26 | 2021-10-22 | 同济大学 | Method for detecting internal reaction parameters of lithium ion power battery |
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Application publication date: 20180817 |