CN210167386U - Battery cell and battery pack - Google Patents
Battery cell and battery pack Download PDFInfo
- Publication number
- CN210167386U CN210167386U CN201921583264.9U CN201921583264U CN210167386U CN 210167386 U CN210167386 U CN 210167386U CN 201921583264 U CN201921583264 U CN 201921583264U CN 210167386 U CN210167386 U CN 210167386U
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- CN
- China
- Prior art keywords
- electrolyte
- battery cell
- battery
- cavity
- flame retardant
- 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.)
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- 239000003792 electrolyte Substances 0.000 claims abstract description 48
- 239000003063 flame retardant Substances 0.000 claims abstract description 46
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 44
- 230000008018 melting Effects 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 abstract 1
- 238000005192 partition Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- SYKNUAWMBRIEKB-UHFFFAOYSA-N [Cl].[Br] Chemical compound [Cl].[Br] SYKNUAWMBRIEKB-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- 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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- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to a battery electricity core and group battery, wherein battery electricity core includes casing (1), apron (2), baffle (3) and hinders burner (4), and casing (1) is equipped with the opening, and apron (2) are used for sealing the opening, baffle (3) set up in casing (1), baffle (3) are used for separating first chamber (11) and second chamber (12) in casing (1), second chamber (12) are used for storing electrolyte, hinder burner (4) and set up in first chamber (11). The battery pack includes battery cells. The flame retardant device in the utility model can prevent the electrolyte from burning before the temperature in the shell reaches the ignition point of the electrolyte, thus fundamentally relieving the problem of thermal runaway and improving the safety of the battery cell; and the flame arrester is not in direct contact with the electrolyte, so that the corrosion action of the electrolyte on the flame arrester can be reduced.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a battery electricity core and group battery.
Background
At present, some energy storage devices on electric vehicles adopt aluminum-shell batteries, and electrolyte in the aluminum-shell batteries is combustible organic liquid, and when the high temperature in the casing takes place the thermal runaway problem, uncontrollable phenomenons such as fire, burning can take place for electrolyte, and then lead to serious incident.
In the related art, a fusing device is arranged in an aluminum-shell battery, and is fused when the current is detected to be too large, so that although a circuit can be cut off, the fusing device cannot prevent electrolyte from being ignited or burnt, the problem of thermal runaway cannot be fundamentally solved, and the safety of the battery is still poor.
It is noted that the information disclosed in this background section of the invention is only for enhancement of understanding of the general background of the invention, and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery electricity core and group battery improves the security of battery.
In order to achieve the above object, the utility model provides a battery cell, include:
a housing provided with an opening;
a cover plate for closing the opening;
the separator is arranged in the shell and used for separating a first cavity and a second cavity in the shell, and the second cavity is used for storing electrolyte; and
the flame arrester is arranged in the first cavity.
In some embodiments, the first chamber and the second chamber are in communication, and the flame retardant includes a flame retardant that is capable of entering the second chamber and causing the electrolyte to solidify.
In some embodiments, the flame arrestor further comprises a wrapping film for wrapping the flame retardant and melting to release the flame retardant before the temperature within the housing reaches the ignition point of the electrolyte.
In some embodiments, the partition plate is provided with a first through hole for communicating the first cavity and the second cavity.
In some embodiments, the flame arrestor is disposed directly above the first through-hole.
In some embodiments, the number of the first through holes is plural, and the plural first through holes are arranged in a staggered manner.
In some embodiments, the cover plate is provided with a second through hole, the partition plate is provided with a third through hole, the electrolyte enters the second cavity through the second through hole and the third through hole, and the flame arrester is staggered with the second through hole and the third through hole.
In some embodiments, the battery cell further includes a positive tab and a negative tab mounted on the cover plate, the second through hole and the third through hole are disposed near the positive tab, and the flame arrester is disposed near the negative tab.
In some embodiments, the separator is an insulating plate.
In order to achieve the above object, the present invention also provides a battery pack, including the above battery cell.
Based on the technical scheme, the embodiment of the utility model provides a including the flame retardant ware, the flame retardant ware can prevent electrolyte from taking place to burn before the temperature in the casing reaches the ignition point of electrolyte, fundamentally alleviates the thermal runaway problem, improves the security of battery electricity core; moreover, the flame arrester is arranged in the first cavity, the electrolyte is stored in the second cavity, and the flame arrester is not in direct contact with the electrolyte, so that the corrosion effect of the electrolyte on the flame arrester can be reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of a battery cell of the present invention.
Fig. 2 is a schematic structural diagram of a separator in an embodiment of a battery cell of the present invention.
In the figure:
1. a housing; 11. a first chamber; 12. a second chamber; 2. a cover plate; 3. a partition plate; 4. a flame arrester; 5. a first through hole; 6. a second through hole; 7. a third through hole; 8. a positive tab; 9. and a negative tab.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the invention.
As shown in fig. 1, in an embodiment of the battery cell provided in the present invention, the battery cell includes a casing 1, a cover plate 2, a partition plate 3 and a flame retardant device 4, wherein an opening is formed at a top of the casing 1, the cover plate 2 is used for closing the opening, and the casing 1 and the cover plate 2 form a substantially closed box; the partition plate 3 is arranged in the shell 1, the partition plate 3 is used for dividing a first cavity 11 and a second cavity 12 in the shell 1, namely, a first side of the partition plate 3 forms the first cavity 11 with the cover plate 2 and the shell 1, a second side of the partition plate 3 opposite to the first side forms the second cavity 12 with the shell 1, the second cavity 12 is used for storing electrolyte, and the flame arrester 4 is arranged in the first cavity 11.
In the above embodiment, the battery cell includes the flame arrester 4, and before the temperature in the casing 1 reaches the ignition point of the electrolyte, the flame arrester 4 can be used to prevent the electrolyte from burning, so as to fundamentally alleviate the problem of thermal runaway and improve the safety of the battery cell; moreover, the flame arrester 4 is arranged in the first chamber 11, the electrolyte is stored in the second chamber 12, and the flame arrester 4 is not in direct contact with the electrolyte, so that the corrosion of the electrolyte on the flame arrester 4 can be reduced.
The flame retardant device 4 is arranged in a chamber different from the electrolyte, so that the flame retardant device 4 can be prevented from occupying the storage space of the electrolyte, the storage capacity of the electrolyte is reduced, and the energy density and the capacity of the battery cell are influenced.
The flame retardant device 4 can achieve flame retardant effect in various ways, for example, the flame retardant can chemically react with the electrolyte, so that the electrolyte has flame retardant components, thereby achieving flame retardant effect.
In this embodiment, the first chamber 11 and the second chamber 12 are in communication, and the flame retardant 4 comprises a flame retardant which is able to enter the second chamber 12 and cause the electrolyte to solidify. After the electrolyte is solidified, electrons and ions cannot be freely transmitted, the movement of internal charges is blocked, the resistance rapidly rises, and the battery cell cannot be charged and discharged, so that the continuous occurrence of chemical reaction and thermal runaway is inhibited, and the occurrence of combustion is fundamentally prevented.
The flame retardant which causes the phase change of the electrolyte can reduce the influence on the chemical composition and the use performance of the electrolyte compared with the flame retardant which causes the chemical reaction of the electrolyte.
The flame retardant can be a bromine-chlorine-containing curing agent, a phosphorus-containing curing agent, a nitrogen-containing curing agent, a silicon-containing curing agent or the like.
The flame arrester 4 further comprises a wrapping film for wrapping the flame retardant, the wrapping film being meltable to release the flame retardant before the temperature within the housing 1 reaches the ignition point of the electrolyte.
After the wrapping film is melted, the flame retardant is released and can enter the second cavity 12 to be mixed with the electrolyte, so that the electrolyte is solidified, and the electrolyte is prevented from being burnt.
The wrapping film may be made of a material having a flame retardant effect, such as flame retardant paraffin (paraffin/polypropylene), NPG (neopentyl glycol), Pentaerythritol (PE), and the like. The coating film can also be made of a material with a corrosion-resistant effect, so that the corrosion of the electrolyte to the flame retardant device 4 is avoided.
There are many options for the way the first and second chambers 11, 12 communicate, such as the first and second chambers 11, 12 may communicate via an extension tube.
In the present embodiment, as shown in fig. 1, the partition plate 3 is provided with a first through hole 5, the first through hole 5 is used for communicating the first chamber 11 and the second chamber 12, and the flame retardant released by the flame retardant device 4 can enter the second chamber 12 through the first through hole 5.
Further, the flame arrester 4 is disposed directly above the first through hole 5. Due to the arrangement, the flame retardant can enter the second cavity 12 more directly and quickly after the wrapping film is melted, the circulation path of the flame retardant is shortened, and the flame retardant efficiency is improved; meanwhile, before the wrapping film is not melted, the flame arrester 4 can also play a role in closing the first through hole 5, and prevent the electrolyte from flowing back to the first cavity 11 through the first through hole 5.
As shown in fig. 2, the number of the first through holes 5 is plural, and the plural first through holes 5 are arranged in a staggered manner. Any adjacent three first through holes 5 are not on the same straight line.
The arrangement has the advantages that the distance between two adjacent first through holes 5 can be reduced as much as possible, and the flow area of the flame retardant is increased, so that the flame retardant can flow into the second cavity 12 as soon as possible after being released, and the flame retardant efficiency is improved; it is also possible to make the released flame retardant directly enter the second chamber 12 in the axial direction of the first through-hole 5 as much as possible, which can save time compared to the case where the flame retardant first contacts the partition plate 3 and then flows into the first through-hole 5.
The cover plate 2 is provided with a second through hole 6, the partition plate 3 is provided with a third through hole 7, and electrolyte enters the second chamber 12 through the second through hole 6 and the third through hole 7. The electrolyte can be injected into the second cavity 12 through the injection needle tube, so as to avoid the electrolyte remaining in the first cavity 11.
The flame arrester 4 is staggered with the second through hole 6 and the third through hole 7, so that the flame arrester 4 can be prevented from influencing the injection of electrolyte, and the electrolyte can be prevented from corroding the flame arrester 4.
The battery cell further comprises a positive tab 8 and a negative tab 9 which are arranged on the cover plate 2, the second through hole 6 and the third through hole 7 are arranged at positions close to the positive tab 8, and the flame retardant device 4 is arranged at a position close to the negative tab 9.
In the above embodiments, the partition 3 is an insulating plate, which has an insulating function and prevents the case 1 from generating electric leakage.
In the above embodiments, the casing 1 is made of an aluminum alloy material, and the battery cell is an aluminum-casing battery cell.
Through right the utility model discloses the explanation of a plurality of embodiments of battery electricity core can see the utility model discloses battery electricity core embodiment is through setting up the flame retardant ware between baffle and apron, when the high temperature of battery electricity core has thermal runaway's hidden danger, the parcel membrane melts, and the flame retardant can release, makes liquid electrolyte solidification inefficacy, plays fire-retardant effect, and the parcel membrane also has fire-retardant effect, and both intercombination reduces the risk of thermal runaway such as battery electricity core emergence burning, promotes the security of battery electricity core.
Based on foretell battery electric core, the utility model discloses still provide a group battery, group battery can also constitute the battery package, and this group battery includes foretell battery electric core.
The positive technical effects of the battery cells in the above embodiments are also applicable to the battery pack, and are not described herein again.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the utility model discloses a do not deviate from under the prerequisite of the principle, still can be right the utility model discloses a specific embodiment modifies or carries out the equivalent replacement to some technical features, and these are modified and should be covered with the equivalent replacement in the middle of the technical scheme scope of the utility model.
Claims (10)
1. A battery cell, comprising:
a housing (1) provided with an opening;
a cover plate (2) for closing the opening;
the separator (3) is arranged in the shell (1) and is used for separating a first cavity (11) and a second cavity (12) in the shell (1), and the second cavity (12) is used for storing electrolyte; and
a flame arrestor (4) disposed within the first chamber (11).
2. The battery cell of claim 1, wherein the first cavity (11) and the second cavity (12) are in communication, and wherein the flame retardant device (4) comprises a flame retardant that is capable of entering the second cavity (12) and causing the electrolyte to solidify.
3. The battery cell of claim 2, wherein the flame retardant device (4) further comprises a wrapping film for wrapping the flame retardant and melting to release the flame retardant before the temperature within the casing (1) reaches the ignition point of the electrolyte.
4. The battery cell according to claim 2, characterized in that the separator (3) is provided with a first through hole (5), and the first through hole (5) is used for communicating the first cavity (11) and the second cavity (12).
5. The battery cell according to claim 4, characterized in that the flame arrestor (4) is arranged directly above the first through-opening (5).
6. The battery cell according to claim 4, wherein the number of the first through holes (5) is plural, and the plural first through holes (5) are arranged in a staggered manner.
7. The battery cell according to claim 1, characterized in that the cover plate (2) is provided with a second through-opening (6), the separator plate (3) is provided with a third through-opening (7), the electrolyte enters the second chamber (12) through the second through-opening (6) and the third through-opening (7), and the flame arrester (4) is offset from the second through-opening (6) and the third through-opening (7).
8. The battery cell of claim 7, further comprising a positive tab (8) and a negative tab (9) mounted on the cover plate (2), wherein the second through hole (6) and the third through hole (7) are disposed near the positive tab (8), and wherein the flame arrestor (4) is disposed near the negative tab (9).
9. The battery cell according to claim 1, characterized in that the separator (3) is an insulating plate.
10. A battery pack comprising the battery cell of any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921583264.9U CN210167386U (en) | 2019-09-23 | 2019-09-23 | Battery cell and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921583264.9U CN210167386U (en) | 2019-09-23 | 2019-09-23 | Battery cell and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210167386U true CN210167386U (en) | 2020-03-20 |
Family
ID=69796335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921583264.9U Active CN210167386U (en) | 2019-09-23 | 2019-09-23 | Battery cell and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210167386U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459706A (en) * | 2019-09-23 | 2019-11-15 | 珠海格力电器股份有限公司 | Battery cell and battery pack |
| CN114944530A (en) * | 2022-06-30 | 2022-08-26 | 凤凰新能源(惠州)有限公司 | Flame-retardant and explosion-proof polymer lithium ion battery |
-
2019
- 2019-09-23 CN CN201921583264.9U patent/CN210167386U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110459706A (en) * | 2019-09-23 | 2019-11-15 | 珠海格力电器股份有限公司 | Battery cell and battery pack |
| CN114944530A (en) * | 2022-06-30 | 2022-08-26 | 凤凰新能源(惠州)有限公司 | Flame-retardant and explosion-proof polymer lithium ion battery |
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