CN116505213A - High-safety lithium power battery with CID and external PTC - Google Patents
High-safety lithium power battery with CID and external PTC Download PDFInfo
- Publication number
- CN116505213A CN116505213A CN202310555580.XA CN202310555580A CN116505213A CN 116505213 A CN116505213 A CN 116505213A CN 202310555580 A CN202310555580 A CN 202310555580A CN 116505213 A CN116505213 A CN 116505213A
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- Prior art keywords
- negative
- cid
- positive
- plate
- anodal
- Prior art date
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Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000004880 explosion Methods 0.000 abstract description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 3
- 230000002269 spontaneous effect Effects 0.000 abstract description 3
- 230000005856 abnormality Effects 0.000 abstract description 2
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000008961 swelling Effects 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- 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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- 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
Abstract
The invention relates to a high-safety lithium power battery with CID and external PTC, belonging to the technical field of lithium ion power batteries. The utility model provides a battery pack, including the battery body that comprises casing, core, anodal part and negative pole part, anodal part is including setting up in the inside anodal busbar of casing, and roof, anodal upper bracket and the anodal plastic baffle under the positive pole have been set gradually to the top of anodal busbar, wherein installs the CID spare on the anodal upper bracket, installs positive post and explosion-proof valve on the anodal upper cover plate, negative pole part is including setting up in the inside negative pole busbar of casing, and the below of negative pole busbar is equipped with the closing cap spare, and the bottom of closing cap spare is provided with conductive assembly. The PTC battery pack can effectively prevent the phenomena of spontaneous combustion, explosion and the like of the battery caused by the abnormalities of short circuit, overcurrent and the like by combining the PTC sheet and the CID piece, thereby improving the safety performance of the battery.
Description
Technical Field
The invention relates to the technical field of lithium ion power batteries, in particular to a high-safety lithium power battery with CID and external PTC.
Background
At present, the energy is excessively consumed and the environmental pollution is more serious, the energy conservation and emission reduction and low-carbon trip are advocated all over the country, and the new energy industry has a superior development prospect. The new energy battery is subjected to market selection and elimination again and again, and the high-performance cylindrical lithium power battery with wide application is accepted by the market. It is energy-saving, environment-friendly, high in capacity, high in energy density and long in service life.
The safety problem of lithium power batteries has been already on schedule, but accidents caused by lithium power batteries are continuous. Leakage, swelling, smoke, spontaneous combustion, explosion, etc. may occur, and the causes of these problems may be internal short circuit of the battery, over-current charge and discharge, over-charge and over-discharge, etc. In the charge and discharge process, the internal temperature and pressure of the battery in short circuit are continuously increased, and explosion is caused.
Therefore, how to process the lithium ion power battery is a technical problem that the skilled person needs to solve.
Disclosure of Invention
The invention aims to solve the problems in the background technology and provides a high-safety lithium power battery with CID configuration and external PTC configuration.
The technical scheme of the invention is as follows: the high-safety lithium power battery comprises a battery main body, wherein the battery main body is composed of a shell, a winding core, a positive electrode part and a negative electrode part, the positive electrode part comprises a positive electrode bus bar arranged in the shell, a positive electrode lower top plate, a positive electrode upper supporting plate and a positive electrode plastic partition plate are sequentially arranged above the positive electrode bus bar, the CID part is arranged on the positive electrode upper supporting plate, and a positive electrode column and an explosion-proof valve are arranged on a positive electrode upper cover plate;
the negative electrode part comprises a negative electrode bus bar arranged in the shell, a sealing cover piece is arranged below the negative electrode bus bar, a conductive component is arranged at the bottom of the sealing cover piece, and the conductive component and the negative electrode bus bar are fixed through a plurality of rivets and are communicated with each other;
the conductive component comprises a negative plastic supporting plate, wherein a lower conductive sheet, a PTC sheet, an upper conductive sheet, a negative upper plastic plate and a negative upper cover plate are sequentially arranged in the negative plastic supporting plate from top to bottom, and a negative column for conducting electricity is arranged at the center of the negative upper cover plate.
Preferably, the positive electrode component and the negative electrode component are respectively arranged at two ends of the shell, the winding core is arranged in the shell, and two ends of the winding core are respectively communicated with the positive electrode bus bar and the negative electrode bus bar.
Preferably, a hole is formed in the center of the positive electrode upper cover plate, the positive electrode column is arranged in the hole, a positive electrode sealing ring used for insulation is arranged in the positive electrode column, and the bottom end of the positive electrode column penetrates through the positive electrode plastic partition plate and is connected to the positive electrode upper supporting plate.
Preferably, the side of hole is provided with slotted hole and the through-hole that is located on the positive pole upper cover plate, the slotted hole is located the CID piece directly over, the explosion-proof valve sets up in the through-hole, and the below of through-hole is provided with the through-hole that runs through positive pole plastic baffle, positive pole upper bracket and positive pole roof under.
Preferably, the sealing cover piece comprises a negative electrode lower plastic plate arranged on the bottom end of the shell, and a negative electrode lower cover plate is arranged at the bottom of the negative electrode lower plastic plate, wherein the negative electrode lower plastic plate is communicated with the negative electrode bus bar.
Preferably, the negative plastic support plate is arranged on the top outer wall of the negative lower cover plate, a connecting hole is formed in the center of the negative upper cover plate, the negative column is arranged in the connecting hole, and the top end of the negative column penetrates through the negative upper plastic plate and is contacted with the upper conductive sheet.
Preferably, a negative electrode sealing ring for insulation is arranged in the connecting hole.
Compared with the prior art, the invention has the following beneficial technical effects:
through the combination setting of PTC piece and CID spare, it can effectually prevent the battery to produce appearance of phenomena such as spontaneous combustion, explosion because of unusual such as short circuit, overflow, and then promotes the security performance of battery.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
fig. 2 is a schematic cross-sectional front view of fig. 1.
Reference numerals: 1. a battery main body; 11. a housing; 12. a winding core; 13. a positive electrode member; 131. a positive electrode bus bar; 132. a lower top plate of the positive electrode, 133 and an upper supporting plate of the positive electrode; 134. a CID piece; 135. a positive plastic separator; 136. an anode upper cover plate; 137. a positive electrode post; 138. an explosion-proof valve; 14. a negative electrode member; 141. a negative electrode bus bar; 142. a negative electrode lower plastic plate; 143. a negative electrode lower cover plate; 144. a negative plastic pallet; 145. a lower conductive sheet; 146. a PTC sheet; 147. an upper conductive sheet; 148. a plastic plate is arranged on the negative electrode; 149. a negative electrode upper cover plate; 1410. a rivet; 1411. and a negative electrode column.
Detailed Description
The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments.
Example 1
As shown in fig. 1-2, the high-safety lithium power battery provided with CID and external PTC according to the present invention comprises a battery body 1 composed of a case 11, a winding core 12, a positive electrode member 13 and a negative electrode member 14. The positive electrode member 13 includes a positive electrode bus bar 131 provided inside the case 11. A lower positive plate 132, an upper positive plate 133 and a plastic positive plate 135 are disposed above the bus bar 131. Wherein, CID piece 134 is installed on positive pole upper supporting plate 133, and positive pole post 137 and explosion-proof valve 138 are installed on positive pole upper cover plate 136.
The negative electrode member 14 includes a negative electrode bus bar 141 provided in the case 11, and a cover is provided below the negative electrode bus bar 141. The bottom of the capping member is provided with a conductive member, and the conductive member is fixed to the negative electrode bus bar 141 by a plurality of rivets 1410, and the communication of the circuit is realized.
The conductive assembly includes a negative plastic support plate 144, and a lower conductive sheet 145, a PTC sheet 146, an upper conductive sheet 147, a negative upper plastic plate 148 and a negative upper cover plate 149 are sequentially disposed inside the negative plastic support plate 144 from top to bottom. Wherein, the center of the upper cover plate 149 is provided with a cathode column 1411 for conducting electricity.
In this embodiment, the PTC sheet 146 increases resistance under a large current to reduce the current in the circuit, and the sheet-shaped PTC sheet 146 can be well connected to other elements of the battery. The CID piece 134 cuts off the current when receiving high voltage, preventing the reaction in the battery body 1 from proceeding continuously. Under the double protection of the PTC sheet 146 and the CID piece 134, the battery body 1 has high safety performance, greatly reducing risks.
In this embodiment, the present invention is applicable to a variety of applications. The PTC sheet 146 is a positive temperature coefficient thermistor with fast temperature rise and fast heat dissipation, and is made of high polymer structural material, and the two sides of the PTC sheet are welded by nickel-plated copper foil and tightly compacted to be pressed into a sheet with the thickness of 0.1-3 mm. The PTC material has a withstand voltage of 4-5V and a maximum current of 200A.
In this embodiment, CID piece 134 is a single use current cutoff device, resembling a bowl. The device for triggering CID 134 must be depressed within a certain large battery.
The working principle of the high-safety lithium power battery based on the configuration CID and the external PTC of the first embodiment is as follows: when the current in the battery body 1 is between 0 and 80A, the resistance of the PTC sheet 146 is small and does not exceed 0.5mΩ, and the temperature change Deltat of the PTC sheet 146 is less than or equal to 20deg.C, and the battery body 1 can be used normally. When the battery body 1 is abnormal, the trigger action is performed, the action current range is 100A-160A, the temperature of the PTC sheet 146 is continuously increased in a short time, the temperature generally does not exceed 120 ℃, the resistance value is rapidly increased, and meanwhile, the current in the circuit is rapidly reduced to be within one tenth of the previous value, so that the battery body 1 is prevented from being damaged by large current. When the abnormality of the battery body 1 is released and the battery body 1 passes the current of not more than 0 to 80A again, the PTC sheet 146 returns to a resistance value lower than 0.5mΩ, and the battery can continue to be used normally. In addition, the PTC sheet 146 is designed at the outer side of the cover member, not only saves the internal space of the battery body 1 and improves the energy density, but also makes the PTC sheet 146 at high temperature not to damage other components inside the battery body 1 and not to affect the electrolyte when the battery body 1 is abnormal.
When the battery body 1 is used normally, the CID piece 134 is used as a conductor connection circuit to form a complete circuit of the battery. When the internal abnormal reaction of the battery body 1 continues, the CID piece 134 may function to cut off the current, preventing the danger from further occurring. When the internal reaction of the battery body 1 is continuously carried out, a large amount of gas is generated, the internal pressure of the battery body 1 is continuously increased, the risk of explosion exists at any time, when the internal pressure reaches the range of 5-15 kg, the CID piece 134 can be turned upwards to disconnect the connection with the positive electrode bus bar 131, the turning piece of the CID piece 134 is disconnected from the middle, and the internal pressure is released while the internal current of the battery body 1 is cut off, so that the battery body 1 cannot be spontaneously ignited or exploded, and the safety is ensured.
Example two
As shown in fig. 2, based on the first embodiment, this embodiment further includes: the positive electrode member 13 and the negative electrode member 14 are provided at both ends of the case 11, respectively. The winding core 12 is disposed inside the housing 11, and two ends of the winding core 12 are respectively connected to the positive bus bar 131 and the negative bus bar 141. A hole is formed in the center of the upper positive cover plate 136, a positive post 137 is arranged in the hole, and a positive sealing ring for insulation is arranged in the positive post 137. The bottom end of the positive post 137 passes through the positive plastic spacer 135 and is connected to the positive top plate 133. The side of the hole is provided with a slot and a through hole on the positive electrode upper cover plate 136, and the slot is located right above the CID piece 134. The explosion-proof valve 138 is disposed in the through hole, and a through hole penetrating the positive plastic spacer 135, the positive upper support plate 133 and the positive lower top plate 132 is disposed below the through hole.
In this embodiment, the burst pressure of the flip chip of CID piece 134 is less than explosion-proof valve 138, and the protection action forms a double protection for the battery together with explosion-proof valve 138 before explosion-proof valve 138.
In this embodiment, the positive electrode upper cover plate 136 and the positive electrode upper supporting plate 133 are insulated by a positive electrode plastic spacer 135. Meanwhile, the positive plastic spacer 135 extends downward by one circle, blocking the positive upper plate 133 and the positive lower plate 132 from contacting the inner wall of the case 11, respectively.
Example III
As shown in fig. 2, based on the first or second embodiment, the present embodiment further includes: the cover member includes a negative electrode lower plastic plate 142 provided on the bottom end of the case 11, and a negative electrode lower cover plate 143 is provided at the bottom of the negative electrode lower plastic plate 142. Wherein, the negative electrode lower plastic plate 142 is communicated with the negative electrode bus bar 141. The negative plastic pallet 144 is disposed on the top outer wall of the negative lower cover plate 143, and a connecting hole is formed at the center of the negative upper cover plate 149. The negative electrode column 1411 is disposed in the connection hole, and the top end of the negative electrode column 1411 passes through the negative electrode upper plastic plate 148 and contacts the upper conductive sheet 147. The connecting hole is internally provided with a negative electrode sealing ring for insulation.
In the present embodiment, the setting range of the rivets 1410 is two to six, two are used in the present embodiment, and the rivets 1410 have a stepped structure. The upper step portion of rivet 1410 is non-conductive and the lower step portion is conductive.
In this embodiment, the first insulating ring for insulating the rivet 1410 is provided on the anode upper cover plate 149, the upper conductive sheet 147, and the PTC sheet 146, and the second insulating ring for insulating the rivet 1410 is provided on the anode lower cover plate 143.
The above-described embodiments are merely a few preferred embodiments of the present invention, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present invention and the related teachings of the above-described embodiments.
Claims (7)
1. The utility model provides a dispose high security lithium power battery of CID and external PTC, includes battery body (1) that constitutes by casing (11), reel core (12), anodal part (13) and negative pole part (14), its characterized in that: the positive component (13) comprises a positive bus bar (131) arranged in the shell (11), a positive lower top plate (132), a positive upper supporting plate (133) and a positive plastic partition plate (135) are sequentially arranged above the positive bus bar (131), wherein a CID (CID) piece (134) is arranged on the positive upper supporting plate (133), and a positive column (137) and an explosion-proof valve (138) are arranged on the positive upper cover plate (136);
the negative electrode part (14) comprises a negative electrode bus bar (141) arranged in the shell (11), a sealing cover piece is arranged below the negative electrode bus bar (141), a conductive component is arranged at the bottom of the sealing cover piece, and the conductive component and the negative electrode bus bar (141) are fixed through a plurality of rivets (1410) and are communicated with each other;
the conductive assembly comprises a negative plastic support plate (144), wherein a lower conductive sheet (145), a PTC sheet (146), an upper conductive sheet (147), a negative upper plastic plate (148) and a negative upper cover plate (149) are sequentially arranged in the negative plastic support plate (144) from top to bottom, and a negative column (1411) for conducting electricity is arranged at the center of the negative upper cover plate (149).
2. The high-safety lithium power cell with CID and external PTC configuration according to claim 1, wherein: the positive electrode component (13) and the negative electrode component (14) are respectively arranged at two ends of the shell (11), the winding core (12) is arranged inside the shell (11), and two ends of the winding core (12) are respectively communicated with the positive electrode bus bar (131) and the negative electrode bus bar (141).
3. The high-safety lithium power cell with CID and external PTC configuration according to claim 1, wherein: the center of the positive electrode upper cover plate (136) is provided with a hole, the positive electrode column (137) is arranged in the hole, a positive electrode sealing ring used for insulation is arranged in the positive electrode column (137), and the bottom end of the positive electrode column (137) penetrates through the positive electrode plastic partition plate (135) and is connected to the positive electrode upper supporting plate (133).
4. A high safety lithium power cell with CID and external PTC configuration according to claim 3, characterized in that: the side of hole is provided with slotted hole and the through-hole that is located on anodal upper cover plate (136), the slotted hole is located directly over CID spare (134), explosion-proof valve (138) set up in the through-hole, and the below of through-hole is provided with the through-hole that runs through anodal plastic baffle (135), anodal upper supporting plate (133) and anodal roof (132) under.
5. The high-safety lithium power cell with CID and external PTC configuration according to claim 1, wherein: the sealing cover piece comprises a negative electrode lower plastic plate (142) arranged at the bottom end of the shell (11), a negative electrode lower cover plate (143) is arranged at the bottom of the negative electrode lower plastic plate (142), and the negative electrode lower plastic plate (142) is communicated with the negative electrode bus bar (141).
6. The high-safety lithium power cell with CID and external PTC configuration according to claim 5, wherein: the negative plastic support plate (144) is arranged on the top outer wall of the negative lower cover plate (143), a connecting hole is formed in the center of the negative upper cover plate (149), the negative column (1411) is arranged in the connecting hole, and the top end of the negative column (1411) penetrates through the negative upper plastic plate (148) and is in contact with the upper conductive sheet (147).
7. The high-safety lithium power cell with CID and external PTC configuration according to claim 6, wherein: and a negative electrode sealing ring for insulation is arranged in the connecting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310555580.XA CN116505213A (en) | 2023-05-17 | 2023-05-17 | High-safety lithium power battery with CID and external PTC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310555580.XA CN116505213A (en) | 2023-05-17 | 2023-05-17 | High-safety lithium power battery with CID and external PTC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116505213A true CN116505213A (en) | 2023-07-28 |
Family
ID=87321448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310555580.XA Pending CN116505213A (en) | 2023-05-17 | 2023-05-17 | High-safety lithium power battery with CID and external PTC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116505213A (en) |
-
2023
- 2023-05-17 CN CN202310555580.XA patent/CN116505213A/en active Pending
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