CN115692924A - Lithium ion power battery structure and laminated battery cell with novel material system - Google Patents
Lithium ion power battery structure and laminated battery cell with novel material system Download PDFInfo
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- CN115692924A CN115692924A CN202211375293.2A CN202211375293A CN115692924A CN 115692924 A CN115692924 A CN 115692924A CN 202211375293 A CN202211375293 A CN 202211375293A CN 115692924 A CN115692924 A CN 115692924A
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- Prior art keywords
- phase change
- battery unit
- battery
- change material
- lithium ion
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 title claims abstract description 19
- 239000012782 phase change material Substances 0.000 claims abstract description 53
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 40
- 229910052744 lithium Inorganic materials 0.000 abstract description 40
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 description 8
- 239000004411 aluminium Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 150000002641 lithium Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
- 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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Abstract
The invention relates to a lithium ion power battery structure with a novel material system, which comprises a first battery unit and a second battery unit, wherein the first battery unit and the second battery unit respectively comprise an anode sheet, a cathode sheet and a diaphragm arranged between the anode sheet and the cathode sheet, a phase change material is arranged between the first battery unit and the second battery unit, the lengths of the phase change material, the first battery unit and the second battery unit are equal, and the heights of the phase change material, the first battery unit and the second battery unit are equal. First battery unit, phase change material and second battery unit arrange in proper order, form seven layers of formula power lithium battery structure, and phase change material is great with the area of contact of first battery unit and second battery unit, and seven layers of formula power lithium battery structure have lower heat conductivity in the direction of height, and the inside heat accessible phase change material that produces of lithium cell derives fast, is favorable to preventing that the whole thermal runaway from appearing in the lithium cell. The invention also relates to a laminated cell.
Description
Technical Field
The invention belongs to the field of power lithium batteries, and particularly relates to a lithium ion power battery structure with a novel material system and a laminated battery cell.
Background
With the global new energy automobile entering a high-speed development mode, the most important power lithium battery in the new energy automobile also begins to become a development post in the automobile industry. The performance parameters of lithium batteries, such as energy density, battery capacity and charging speed, also become a great focus of the development of a new energy era.
A conventional six-layer power lithium battery structure includes a first battery cell and a second battery cell arranged side by side, each of the first battery cell and the second battery cell including an anode sheet, a cathode sheet, and a separator disposed between the anode sheet and the cathode sheet.
The scheme of radiating the outside of the battery is usually adopted for heat transfer of the six-layer power lithium battery structure, however, the heat conductivity of the lithium battery in the thickness direction is extremely low, and the scheme of radiating the outside of the lithium battery is difficult to realize the rapid cooling of the inside of the lithium battery. And the crisscross mode of arranging of original negative and positive pole range upon range of among the six laminar power lithium ion battery often makes the internal reaction of lithium cell too concentrated, often has the battery thermal runaway problem that transships overheated, fill soon and put and lead to, in case local overheat appears, then the whole thermal runaway of lithium cell appears very easily, even if in normal use, the reaction heat of high concentration also very difficult heat-conduction through lithium cell itself is arranged and is dispersed to the external world, harm lithium cell life-span greatly.
Disclosure of Invention
Aiming at the technical problems in the prior art, one of the purposes of the invention is as follows: the lithium ion power battery structure with the novel material system can rapidly derive the heat inside the lithium battery, is favorable for preventing the lithium battery from generating integral thermal runaway, and prolongs the service life of the lithium battery.
Aiming at the technical problems in the prior art, the second purpose of the invention is as follows: the laminated battery cell is provided, and the heat in the lithium battery can be quickly led out.
The purpose of the invention is realized by the following technical scheme:
lithium ion power battery structure with novel material system, including first battery cell and second battery cell, first battery cell and second battery cell all include anode strip, negative pole piece and locate the diaphragm between anode strip and the negative pole piece, are equipped with phase change material between first battery cell and the second battery cell, and phase change material, first battery cell and second battery cell's length homogeneous phase, and phase change material, first battery cell and second battery cell's height homogeneous phase equals.
Further, the phase change material is disposed between the first cell anode tab and the second cell anode tab, or between the first cell anode tab and the second cell cathode tab, or between the first cell cathode tab and the second cell cathode tab.
Further, the phase-change material is tightly attached to the adjacent cathode sheet and/or anode sheet.
Further, the phase change material is a single phase change material or a phase change device.
Furthermore, the phase change device is a phase change soaking plate or a phase change heat pipe.
Furthermore, the phase change device comprises a metal-based phase change device, and an insulating device is arranged outside the metal-based phase change device.
Furthermore, the insulating device is an insulating film or an insulating coating adhered to the outside of the metal-based phase change device.
Further, when both sides of the phase change material are cathode plates, the phase change material is a single phase change material, or a polymer flexible phase change device, or a pure aluminum-based phase change device without insulation protection.
Further, when both sides of the phase change material are anode sheets, the phase change material is a single phase change material, or a high polymer flexible phase change device, or a pure copper-based phase change device without insulation protection.
The laminated battery cell comprises a plurality of lithium ion power battery structures with novel material systems, and the plurality of lithium ion power battery structures are sequentially overlapped and spliced to form the laminated battery cell.
Compared with the prior art, the invention has the following beneficial effects:
because first battery cell and second battery cell all include the anode strip, the negative pole piece and locate the diaphragm between anode strip and the negative pole piece, phase change material sets up between first battery cell and second battery cell, first battery cell, phase change material and second battery cell arrange in proper order, form seven layers of power lithium battery structures, and because phase change material, the length homogeneous phase of first battery cell and second battery cell, phase change material, the height homogeneous phase of first battery cell and second battery cell, therefore, phase change material is great with the area of contact of first battery cell and second battery cell, heat conduction area maximize, seven layers of power lithium battery structures have lower thermal conductivity in the direction of height, the inside heat accessible phase change material that produces of lithium cell is derived fast, be favorable to preventing that the lithium cell from appearing whole thermal runaway, the life of lithium cell has been prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a lithium ion power battery structure with a novel material system.
In the figure:
1-cathode sheet, 2-anode sheet, 3-diaphragm and 4-phase-change material.
Detailed Description
The traditional cooling mode of the six-layer power lithium battery structure mainly comprises air cooling and water cooling, however, the air cooling efficiency is low, the water cooling is more uneven, the temperature difference of the six-layer power lithium battery is large, and the service life of the six-layer power lithium battery is seriously influenced. In contrast, phase-change heat dissipation is a more efficient cooling means. The common phase change heat dissipation mainly comprises a single phase change material 4 such as a refrigerant, paraffin and the like, and the heat is quickly absorbed by utilizing the phase change latent heat of the single phase change material and quickly released at a low temperature end, so that the quick heat conduction is realized, and the temperature is uniform. The traditional six-layer power lithium battery generally adopts a scheme of radiating heat outside the battery, but the six-layer power lithium battery has extremely low thermal conductivity in the thickness direction, so that the scheme is difficult to realize rapid cooling inside the battery.
Based on this, the technical scheme of this application mainly improves six traditional laminar power lithium cell structures, through the high efficiency of effectively utilizing phase transition heat transfer, effectively combines battery and phase change material 4, realizes the whole high-efficient heat dissipation of battery to more effectively realize the safety under the battery extreme condition.
The present invention is described in further detail below.
Example 1
As shown in fig. 1, the lithium ion power battery structure with a novel material system comprises a first battery unit and a second battery unit, wherein each of the first battery unit and the second battery unit comprises an anode sheet 2, a cathode sheet 1 and a separator 3 arranged between the anode sheet 2 and the cathode sheet 1.
Phase change material 4 is arranged between the first battery unit and the second battery unit, and the first battery unit, the phase change material 4 and the second battery unit are sequentially arranged to form a seven-layer power lithium battery structure.
Because phase change material 4, the length homoenergetic of first battery cell and second battery cell equals, phase change material 4, the high homoenergetic of first battery cell and second battery cell equals, consequently, phase change material 4 is great with the area of contact of first battery cell and second battery cell, heat conduction area maximize, seven layer power lithium battery structure has lower thermal conductivity in the direction of height, the inside heat accessible phase change material 4 that produces of lithium cell derives fast, be favorable to preventing that the lithium cell from appearing whole thermal runaway, the life of lithium cell has been prolonged.
In this embodiment, phase change material 4 locates between first battery unit anode strip 2 and the second battery unit cathode strip 1, and phase change material 4 adopts aluminium base soaking plate, and aluminium base soaking plate surface spraying has a layer of insulating varnish, treats insulating varnish and dries the back, and aluminium base soaking plate closely laminates with the cathode strip 1 and the anode strip 2 of both sides, need not paint the reaction layer on the binding face of cathode strip 1 and anode strip 2.
A plurality of seven-layer power lithium battery structures are sequentially overlapped and spliced and then are installed in a battery shell, and organic electrolyte solution is filled in the battery shell, so that a laminated lithium battery cell monomer is formed. Because the lithium battery structure with internal low thermal conductivity is adopted, the heat generated inside the laminated lithium battery cell monomer can be quickly led out through the phase-change material 4, the high performance of the lithium battery can be kept, and the service life of the lithium battery can be prolonged.
Example 2
The difference between the present embodiment and embodiment 1 is that the phase change material 4 is disposed between the first cell anode sheet 2 and the second cell anode sheet 2, and the phase change material 4 is a copper-based extreme ultra-thin soaking plate with a thickness of 0.3mm.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. Lithium ion power battery structure with novel material system, its characterized in that: the battery pack comprises a first battery unit and a second battery unit, wherein the first battery unit and the second battery unit respectively comprise an anode strip, a cathode strip and a diaphragm arranged between the anode strip and the cathode strip, a phase change material is arranged between the first battery unit and the second battery unit, the lengths of the phase change material, the first battery unit and the second battery unit are equal, and the heights of the phase change material, the first battery unit and the second battery unit are equal.
2. The lithium ion power cell structure with novel material system according to claim 1, characterized in that: the phase change material is arranged between the anode sheet of the first battery unit and the anode sheet of the second battery unit, or between the anode sheet of the first battery unit and the cathode sheet of the second battery unit, or between the cathode sheet of the first battery unit and the cathode sheet of the second battery unit.
3. The lithium ion power cell structure with novel material system according to claim 1, characterized in that: the phase-change material is tightly attached to the adjacent cathode sheet and/or anode sheet.
4. The lithium ion power cell structure with novel material system according to claim 1, characterized in that: the phase change material is a single phase change material or a phase change device.
5. The lithium ion power cell structure with novel material system according to claim 4, characterized in that: the phase change device is a phase change soaking plate or a phase change heat pipe.
6. The lithium ion power cell structure with novel material system according to claim 4, characterized in that: the phase change device comprises a metal-based phase change device, and an insulating device is arranged outside the metal-based phase change device.
7. The lithium ion power cell structure with novel material system according to claim 6, characterized in that: the insulating device is an insulating film or an insulating coating attached to the outside of the metal-based phase change device.
8. The lithium ion power cell structure with novel material system according to claim 2, characterized in that: when the two sides of the phase change material are both cathode plates, the phase change material is a single phase change material, or a high-molecular flexible phase change device, or a pure aluminum-based phase change device without insulation protection.
9. The lithium ion power cell structure with novel material system according to claim 2, characterized in that: when the two sides of the phase change material are both anode sheets, the phase change material is a single phase change material, or a high-molecular flexible phase change device, or a pure copper-based phase change device without insulation protection.
10. Stromatolite formula electricity core, its characterized in that: the novel material system comprises a plurality of lithium ion power battery structures according to any one of claims 1 to 9, wherein the plurality of lithium ion power battery structures are sequentially overlapped and spliced to form a laminated battery cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211375293.2A CN115692924A (en) | 2022-11-04 | 2022-11-04 | Lithium ion power battery structure and laminated battery cell with novel material system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211375293.2A CN115692924A (en) | 2022-11-04 | 2022-11-04 | Lithium ion power battery structure and laminated battery cell with novel material system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115692924A true CN115692924A (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211375293.2A Pending CN115692924A (en) | 2022-11-04 | 2022-11-04 | Lithium ion power battery structure and laminated battery cell with novel material system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115692924A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010013222A1 (en) * | 2010-03-29 | 2011-09-29 | Siemens Aktiengesellschaft | Rechargeable electrochemical energy storage e.g. lithium ion battery, has phase change material arranged in housing for temperature control, where part of material absorbs heat delivered by storage during charging/discharging |
| CN214957238U (en) * | 2021-06-10 | 2021-11-30 | 东莞市景佳能源有限公司 | Explosion-proof lithium battery |
| CN115172929A (en) * | 2022-07-01 | 2022-10-11 | 广东畅能投资控股有限公司 | Power battery cell structure with phase-change heat transfer electrode and preparation method thereof |
| CN217903347U (en) * | 2022-06-24 | 2022-11-25 | 广东畅能投资控股有限公司 | Power battery based on phase change heat transfer type battery core and shell structure |
-
2022
- 2022-11-04 CN CN202211375293.2A patent/CN115692924A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010013222A1 (en) * | 2010-03-29 | 2011-09-29 | Siemens Aktiengesellschaft | Rechargeable electrochemical energy storage e.g. lithium ion battery, has phase change material arranged in housing for temperature control, where part of material absorbs heat delivered by storage during charging/discharging |
| CN214957238U (en) * | 2021-06-10 | 2021-11-30 | 东莞市景佳能源有限公司 | Explosion-proof lithium battery |
| CN217903347U (en) * | 2022-06-24 | 2022-11-25 | 广东畅能投资控股有限公司 | Power battery based on phase change heat transfer type battery core and shell structure |
| CN115172929A (en) * | 2022-07-01 | 2022-10-11 | 广东畅能投资控股有限公司 | Power battery cell structure with phase-change heat transfer electrode and preparation method thereof |
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Application publication date: 20230203 |