CN217848216U - Thermal runaway rail gas guide battery pack - Google Patents
Thermal runaway rail gas guide battery pack Download PDFInfo
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- CN217848216U CN217848216U CN202222074286.0U CN202222074286U CN217848216U CN 217848216 U CN217848216 U CN 217848216U CN 202222074286 U CN202222074286 U CN 202222074286U CN 217848216 U CN217848216 U CN 217848216U
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- battery
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- proof valve
- box
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- 238000007789 sealing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 6
- 230000006698 induction Effects 0.000 abstract description 3
- 238000004880 explosion Methods 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035945 sensitivity 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 utility model provides a thermal runaway has rail air guide battery package, it includes battery box, a plurality of electricity core, a plurality of one-level explosion-proof valve and second grade explosion-proof valve, and each electricity core is all fixed in the inside of battery box, and all arranges in the coplanar. The thermal runaway rail gas guide battery pack is provided with at least one gas guide groove, and each gas guide groove is provided with at least one secondary explosion-proof valve, the primary explosion-proof valve is broken after the thermal runaway of the battery core, the gas in the battery core is discharged, the generated gas is flushed into the corresponding gas guide groove, so that the pressure in the gas guide groove is instantly increased, the secondary explosion-proof valve in the corresponding gas guide groove is flushed, the gas is discharged, and the safety of the battery pack is effectively improved; the gas guide groove is directly arranged on the battery box, the thickness of the corresponding part of the battery box is improved, the battery box is not easy to deform, and the pressure reduction caused by the deformation of the gas guide groove after gas rushes into the gas guide groove can be avoided, so that the pressure induction precision of the secondary explosion-proof valve is improved.
Description
Technical Field
The utility model relates to a power battery technical field especially relates to a thermal runaway has rail air guide battery package.
Background
With the development of science and technology, the requirement for high energy density of secondary batteries is higher and higher, and the light weight of the secondary batteries is paid more and more attention by enterprises. It is a current trend to increase energy density with the same volume of secondary batteries. The battery package includes the box and sets up a plurality of battery module in the box. The battery module includes a plurality of secondary batteries, a case, and a sealing plate. When the secondary battery is thermally runaway due to overcharge or other reasons, high-temperature and high-pressure gas, even flames, may be generated. Gas or the flame of eruption can direct action on the box of battery package to can melt the box and wear and the emergence accident, in order to avoid the production of accident, can all set up explosion-proof valve on electric core and battery box.
In the prior art, an anti-explosion valve and a battery module of the authorization publication number CN208970607U disclose that an anti-explosion valve is arranged on a battery module shell to ensure the use safety of the battery module, most of the reasons of the explosion and fire of the existing lithium battery pack are that the internal air pressure rises sharply after the internal electric core is out of control due to heat, and the anti-explosion valve at the battery pack level is not opened in time; the reason why the battery pack level explosion-proof valve is not opened in time is that after the battery cell explosion-proof valve is damaged, generated gas is scattered and cannot be gathered at the battery pack level explosion-proof valve, so that local pressure is difficult to increase quickly, and the battery pack level explosion-proof valve cannot be broken.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a thermal runaway has rail air guide battery package can break the back at the explosion-proof valve of electricity core, and it is gaseous through the track flow to produce, increases the inside pressure of track in the twinkling of an eye, will set up the explosion-proof valve of battery box in the track and break to improve the sensitivity of explosion-proof valve of battery box.
The technical scheme of the utility model is realized like this: the utility model provides a thermal runaway rail air guide battery pack, which comprises a battery box, a plurality of battery cores, a plurality of primary explosion-proof valves and secondary explosion-proof valves, wherein,
each battery cell is fixed inside the battery box and is distributed in the same plane;
the number of the primary explosion-proof valves is the same as that of the battery cells, and each primary explosion-proof valve is embedded in each battery cell;
the secondary explosion-proof valve is embedded on the battery box;
the battery box is characterized in that at least one gas guide groove is formed in the inner wall of the battery box, at least one secondary explosion-proof valve is arranged in each gas guide groove, and the axial lead of each primary explosion-proof valve is far away from one end of the battery core and extends into each gas guide groove.
On the basis of the above technical solution, preferably, the battery box includes a box body and a box cover, wherein,
one side of the box body is provided with an opening and is used for installing the battery cell;
and the box cover is fixed with the box body and used for sealing one side of the opening of the box body, and the air guide groove and the secondary anti-explosion valve are both arranged on the box cover.
On the basis of the above technical solution, preferably, the number of the air guide grooves is two.
Further preferably, four strips are included, wherein,
four it is rectangular, all fix on battery box with the same one side inner wall, wherein two rectangular air guide groove that forms, two in addition rectangular another air guide groove that forms.
Still further preferably, four of the strips are integrally formed with the battery case.
Further preferably, the two air guide grooves are formed in one side wall of the battery box.
On the basis of the technical scheme, preferably, the width of the air guide groove is 2-5mm larger than that of the secondary explosion-proof valve.
The utility model discloses a thermal runaway has following beneficial effect for prior art to have by rail air guide battery package: (1) The battery pack is provided with at least one gas guide groove, and each gas guide groove is provided with at least one secondary explosion-proof valve, the primary explosion-proof valve is broken after the thermal runaway of the battery core, the gas in the battery core is discharged, the generated gas rushes into the corresponding gas guide groove, the pressure in the gas guide groove is instantly increased, the secondary explosion-proof valve in the corresponding gas guide groove is rushed, and the gas is discharged, so that the safety of the battery pack is effectively improved;
(2) The gas guide groove is directly arranged on the battery box, the thickness of the corresponding part of the battery box is improved, the battery box is not easy to deform, and the pressure intensity of the gas guide groove is reduced due to deformation after gas rushes into the gas guide groove, so that the pressure induction precision of the secondary explosion-proof valve is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is an exploded view of a thermally runaway rail-guided air battery pack of the present invention;
FIG. 2 is a perspective view of a first embodiment of a thermal runaway rail-bound air guide battery pack of the present invention;
FIG. 3 is a perspective view of a second embodiment of a thermal runaway rail-guided air cell package of the present invention;
fig. 4 is a perspective view of a third embodiment of a thermal runaway rail-bound air guide battery pack of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the first embodiment of giving, the utility model discloses a thermal runaway has rail air guide battery package, it includes battery box 1, a plurality of electricity core 2, a plurality of one-level explosion-proof valve 3 and second grade explosion-proof valve 4.
The battery box 1 is in a hollow cuboid shape, the interior of the battery box is used for installing the battery core 2, the battery core 2 is isolated from the outside, and at least one air guide groove 101 is formed in the inner wall of the battery box 1.
Each electricity core 2 arranges along width direction in battery box 1 and forms the battery module, and the battery module arranges in battery box 1 along its width direction to fix with battery box 1's inside, the quantity of air guide groove 101 should equal with battery module quantity.
One-level explosion-proof valve 3, quantity is the same with electric core 2, and each one-level explosion-proof valve 3 inlays respectively and establishes on each electric core 2, and each one-level explosion-proof valve 3 links to each other on the battery module and forms the straight line, and the straight line that forms is parallel with air guide groove 101, and one-level explosion-proof valve 3 breaks after electric core 2 thermal runaway, the inside gas of discharge electricity core 2, the one end of electric core 2 is kept away from to the axial lead of one-level explosion-proof valve 3, all extend to rather than the air guide groove 101 that corresponds in.
Second grade explosion-proof valve 4 inlays and establishes on battery box 1, the quantity of air guide groove 101 is no less than to the quantity, and in every air guide groove 101, be provided with a second grade explosion-proof valve 4 at least, after certain electric core 2 thermal runaway, the one-level explosion-proof valve 3 that corresponds with it breaks, the gas that produces will rush into corresponding air guide groove 101 in, make the pressure in air guide groove 101 rise in the twinkling of an eye, and rush through the second grade explosion-proof valve 4 in corresponding air guide groove 101, thereby effectively improve the security of battery package.
As a preferred embodiment, the battery box 1 includes a box body 11 and a box cover 12, wherein one side of the box body 11 is provided with an opening for installing the battery cell 2, the box cover 12 is fixed to the box body 11 and is used for sealing one side of the opening of the box body 11, the air guide groove 101 and the secondary explosion-proof valve 4 are both arranged on the box cover 12, the battery cell 2 and the battery module formed by the battery cell 2 have their electrodes facing upward generally, and in the conventional arrangement in the technical field, the primary explosion-proof valve 3 is generally located on the opposite side of two poles of the battery cell 2, i.e. facing to the box cover 12, the air guide groove 101 and the secondary explosion-proof valve 4 are both arranged on the box cover 12, so as to facilitate the installation operation of the overhaul and the battery cell 2 and the battery module formed by the same.
In this embodiment, the number of the air guide grooves 101 is two, and the two air guide grooves correspond to two battery modules formed by a plurality of battery cells 2 in the battery box 1 respectively.
Wherein, set up four rectangular 5, four on case lid 12 rectangular 5 and battery box 1 integrated into one piece, and all fix on battery box 1 with the inner wall of one side, four rectangular 5 all are parallel with the length direction of battery module, wherein two rectangular 5 forms an air guide groove 101, two in addition rectangular 5 forms another air guide groove 101, and two air guide grooves 101 that form correspond two battery modules respectively, directly set up four rectangular 5 on battery box 1, can accomplish this scheme with minimum cost.
The working principle of the embodiment is as follows: after the electric core 2 generates thermal runaway, the corresponding primary explosion-proof valve 3 is broken, gas in the electric core 2 is discharged, and the generated gas rushes into the corresponding gas guide groove 101, so that the pressure in the gas guide groove 101 is instantly increased, and the secondary explosion-proof valve 4 in the corresponding gas guide groove 101 is broken.
As shown in fig. 1 and 3, a second embodiment is provided, which omits the strip 5 on the basis of the first embodiment, thickens the case cover 12, directly forms two gas guide grooves 101 on the case cover 12, and uses the two gas guide grooves 101 to respectively face two battery modules formed by a plurality of battery cells 2, and has the same principle as the first embodiment, after the first-stage explosion-proof valve 3 is ruptured, gas is guided through the gas guide grooves 101, the pressure in the gas guide grooves 101 is instantly increased, and the second-stage explosion-proof valve 4 is opened, compared with the first embodiment, the second embodiment increases the thickness of the case cover 12, increases the cost of raw materials for production, but improves the deformation resistance of the case cover 12, and after the first-stage explosion-proof valve 3 is ruptured, when gas is flushed into the gas guide grooves 101, the deformation is not easily generated, and can avoid that after the gas is flushed into the gas guide grooves 101, the pressure of the gas guide grooves 101 is reduced due to deformation, so that the pressure induction accuracy of the second-stage explosion-proof valve 4 is improved.
As shown in fig. 4, in the third embodiment, after the number of the battery modules is changed to three, the number of the gas guide grooves 101 on the case cover 12 is changed to three correspondingly, and the three battery modules are directly aligned, so that the gas formed after the primary explosion-proof valve 3 of each battery cell 2 is broken can still be flushed into the gas guide grooves 101, and effective explosion prevention of each battery module and the battery cells 2 constituting the battery module is realized.
It should be noted that, in any scheme, the width of the gas guiding groove 101 should be 2-5mm larger than the width of the secondary explosion-proof valve 4, and exceeding the width of 5mm may cause gas to rush into the gas guiding groove 101, so that the gas is dispersed more, resulting in a smaller pressure compared to when the width of the gas guiding groove 101 is 2-5mm larger than the width of the secondary explosion-proof valve 4, and thus the rupture of the secondary explosion-proof valve 4 is affected.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A thermal runaway rail gas guide battery pack comprises a battery box (1), a plurality of battery cores (2), a plurality of primary explosion-proof valves (3) and secondary explosion-proof valves (4), wherein,
each electric core (2) is fixed inside the battery box (1) and is distributed in the same plane;
the number of the primary explosion-proof valves (3) is the same as that of the battery cells (2), and each primary explosion-proof valve (3) is embedded in each battery cell (2);
the secondary explosion-proof valve (4) is embedded on the battery box (1);
the method is characterized in that: the battery box is characterized in that at least one air guide groove (101) is formed in the inner wall of the battery box (1), at least one secondary explosion-proof valve (4) is arranged in each air guide groove (101), and the axial lead of each primary explosion-proof valve (3) is far away from one end of the battery core (2) and extends into each air guide groove (101).
2. The thermal runaway rail gas cell package of claim 1, wherein: the battery box (1) comprises a box body (11) and a box cover (12), wherein,
the battery cell box comprises a box body (11), one side of which is provided with an opening and is used for installing the battery cell (2);
and the box cover (12) is fixed with the box body (11) and used for sealing one side of the opening of the box body (11), and the air guide groove (101) and the secondary explosion-proof valve (4) are both arranged on the box cover (12).
3. The thermal runaway rail gas guided battery pack of claim 1, wherein: the number of the air guide grooves (101) is two.
4. The thermal runaway rail gas cell package of claim 3, wherein: also comprises four bars (5), wherein,
four rectangular (5), all fix on battery box (1) same one side inner wall, wherein two rectangular (5) form one air guide groove (101), two in addition rectangular (5) form another air guide groove (101).
5. The thermal runaway rail gas cell package of claim 4, wherein: four rectangular (5) and battery box (1) integrated into one piece.
6. The thermal runaway rail gas cell package of claim 3, wherein: two air guide grooves (101) are formed in one side wall of the battery box (1).
7. The thermal runaway rail gas cell package of claim 1, wherein: the width of the air guide groove (101) is 2-5mm larger than that of the secondary explosion-proof valve (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222074286.0U CN217848216U (en) | 2022-08-08 | 2022-08-08 | Thermal runaway rail gas guide battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222074286.0U CN217848216U (en) | 2022-08-08 | 2022-08-08 | Thermal runaway rail gas guide battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217848216U true CN217848216U (en) | 2022-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222074286.0U Active CN217848216U (en) | 2022-08-08 | 2022-08-08 | Thermal runaway rail gas guide battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217848216U (en) |
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2022
- 2022-08-08 CN CN202222074286.0U patent/CN217848216U/en active Active
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