CN219203334U - Battery pack - Google Patents
Battery pack Download PDFInfo
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- CN219203334U CN219203334U CN202223598816.8U CN202223598816U CN219203334U CN 219203334 U CN219203334 U CN 219203334U CN 202223598816 U CN202223598816 U CN 202223598816U CN 219203334 U CN219203334 U CN 219203334U
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- cavity
- battery
- battery pack
- pressure release
- insulating support
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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 battery pack which comprises a battery cell group and a battery box, wherein the battery cell group comprises a plurality of battery cells, and a pressure release valve, a positive pole column and a negative pole column are arranged at the bottom of each battery cell; the plurality of battery cells are arranged in parallel in the same direction; the battery box comprises a bottom plate and side beams surrounding the periphery of the bottom plate, a containing space is formed by the bottom plate and the side beams and used for containing the battery cell groups, the pressure release valve faces the bottom plate, the bottom plate comprises an upper plate and a lower plate, a first cavity and a second cavity are formed between the upper plate and the lower plate, the first cavity is not communicated with the second cavity, the position of the first cavity is correspondingly arranged below the pressure release valve on a plurality of battery cells and is communicated with the pressure release valve, so that high-temperature gas discharged in the battery cells can be timely led out when the battery cells are out of control, and the explosion or ignition risk of the battery cells is reduced; the second cavity is used for introducing cooling liquid, and the position of the second cavity is correspondingly arranged below the positive pole and the negative pole, so that the battery cell is cooled in time.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to a battery pack.
Background
The battery pack is an important component of the electric automobile, and can emit a large amount of heat energy under the working state, the existing battery pack cools the battery cell through the water cooling plate, and the water is used for taking away the redundant heat generated in the charging and discharging process of the battery, so that the battery pack is at a proper working temperature, and the temperature of each part of the battery pack is controlled within a smaller range. However, in the use process, if any single battery unit is out of control due to overcurrent, overheat, internal short circuit or physical collision, the phenomena of rapid release of heat, generation of a large amount of reaction gas, even open fire and explosion occur can occur, the high-temperature combustible gas discharged by the battery can not be discharged timely and effectively, and because the high-temperature combustible gas can not be discharged timely, a large amount of heat is accumulated, the cooling effect is not achieved by cooling the battery unit by a cooling plate containing cooling liquid, the heat can spread to other adjacent battery units which normally work, and the heat spreads to the whole battery pack, so that the gas is accumulated more and more, and finally, a plurality of battery cores are in series connection for explosion or ignition, if the battery is not cooled and extinguished by proper means, the damage caused by the battery unit is also not negligible.
Disclosure of Invention
The utility model aims to overcome the defect that a battery pack cannot be optimized in thermal runaway in the prior art.
The utility model solves the technical problems by the following technical scheme:
the present utility model provides a battery pack including:
the battery cell group comprises a plurality of battery cells, and a pressure release valve, a positive pole column and a negative pole column are arranged at the bottom of each battery cell; the plurality of battery cells are arranged in parallel in the same direction;
the battery box comprises a bottom plate and side beams surrounding the periphery of the bottom plate, wherein a containing space is formed by the bottom plate and the side beams and used for containing the battery cell group, the pressure release valve is arranged towards the bottom plate, the bottom plate comprises an upper plate and a lower plate, a first cavity and a second cavity are formed between the upper plate and the lower plate, the first cavity is not communicated with the second cavity, and the position of the first cavity is correspondingly arranged below the pressure release valves on the battery cells and is communicated with the pressure release valves; the second cavity is used for introducing cooling liquid, and the position of the second cavity is correspondingly arranged below the positive pole and the negative pole.
In the scheme, the battery cell group comprises a plurality of battery cells, a pressure release valve, a positive pole column and a negative pole column are arranged at the bottom of each battery cell, the pressure release valve on each battery cell is arranged towards the bottom plate of the battery box, namely, the battery cell group is inverted, a first cavity and a second cavity are arranged at the bottom of the battery box, the position of the first cavity is correspondingly arranged below the pressure release valves on the plurality of battery cells and communicated with the pressure release valves, and high-temperature gas discharged in each battery cell can be timely led out when the battery cells are out of control, so that the risk of serial explosion or ignition of the battery cells is reduced; the second cavity is used for introducing cooling liquid, and the position of the second cavity is correspondingly arranged below the positive pole and the negative pole, so that the battery cell can be cooled in time.
Preferably, an exhaust hole is formed in the upper layer plate at a position corresponding to the pressure release valve on the battery cell, and the first cavity is communicated with the pressure release valve through the exhaust hole.
In this scheme, set up the exhaust hole on the upper plate and the position department that corresponds with the relief valve on the electric core, make first cavity and relief valve intercommunication, the high temperature exhaust after the relief valve was opened can get into first cavity through the exhaust hole.
Preferably, the thickness of the upper layer plate corresponding to the area where the first cavity is located is smaller than the thickness of the lower layer plate corresponding to the area where the first cavity is located.
In this scheme, the thickness that corresponds to first cavity place region on the top plate is less than the thickness that corresponds to first cavity place region on the bottom plate for the top plate in first cavity place region is more easily melted, and high temperature exhaust can pass through fast, makes the bottom plate in first cavity place region have better intensity can provide better supporting performance.
Preferably, the battery cell group further comprises a first insulating support and a second insulating support, the first insulating support and the second insulating support correspond to the positions of the positive pole and the negative pole of the battery cell respectively and are arranged on a plurality of battery cells side by side, the first insulating support is provided with a plurality of first mounting grooves, the second insulating support is provided with a plurality of second mounting grooves, the first mounting grooves and the second mounting grooves are respectively avoided the positive pole and the negative pole, so that the positive pole and the negative pole are exposed relative to the first insulating support and the second insulating support respectively, a plurality of first mounting grooves and a plurality of second mounting grooves are respectively provided with a bus bar, and the bus bar is contacted with the positive pole or the negative pole to realize connection of adjacent battery cells.
In this scheme, realize the fixed of electric core group through first insulating support and second insulating support to set up the busbar and realize the connection of electric core in the first mounting groove of first insulating support and the second mounting groove of second support.
Preferably, the bus piece is connected with the bottom plate through an insulating heat conducting piece.
In this scheme, connect through insulating heat conduction spare between with converging piece and the bottom plate, through heat transfer on the insulating heat conduction spare will converging the piece to the bottom plate on, can further strengthen the efficiency of heat conduction, improve the cooling rate to the electric core.
Preferably, the insulating heat conducting piece is heat conducting glue.
Preferably, a water inlet connector and a water return connector which are communicated with the second cavity are arranged on the side beam of the battery box.
In this scheme, set up on the boundary beam of battery box with the water inlet joint and the return water joint of second cavity intercommunication, conveniently let in and discharge the coolant liquid.
Preferably, the cell group comprises a heat insulating plate or a reinforcing rib, and the heat insulating plate or the reinforcing rib is arranged between two adjacent cells.
In the scheme, the heat insulation plate is arranged between the two adjacent electric cores, so that heat can be transferred to the adjacent electric cores after one electric core fails in a thermal runaway manner, and the probability of failure of the adjacent electric cores is reduced or avoided; the reinforcing ribs are arranged between two adjacent battery cells, so that the structural strength of the battery cell group can be enhanced.
Preferably, the electric core group comprises a heat insulation plate and a reinforcing rib, and the heat insulation plate and the reinforcing rib are alternately arranged between two adjacent electric cores.
In this scheme, electric core group includes heat insulating board and stiffening rib, and heat insulating board and stiffening rib set up in turn between two adjacent electric cores, not only can separate heat transfer between the electric core, can also strengthen the structural strength of electric core group.
Preferably, the heat insulation board is foam.
The utility model has the positive progress effects that: the battery cell group comprises a plurality of battery cells, a pressure release valve, a positive pole column and a negative pole column are arranged at the bottom of each battery cell, the pressure release valve on each battery cell is arranged towards the bottom plate of the battery box, namely, the battery cell group is inverted, a first cavity and a second cavity are arranged at the bottom of the battery box, the position of the first cavity is correspondingly arranged below the pressure release valve on each battery cell and communicated with the pressure release valve, and high-temperature gas discharged in each battery cell can be timely led out when the battery cell is out of heat control, so that the risk of serial explosion or ignition of the battery cell is reduced; the second cavity is used for introducing cooling liquid, and the position of the second cavity is correspondingly arranged below the positive pole and the negative pole, so that the battery cell can be cooled in time.
Drawings
Fig. 1 is a schematic view illustrating an external structure of a battery pack according to an embodiment of the present utility model.
Fig. 2 is a schematic diagram illustrating a disassembled structure of a battery pack according to an embodiment of the utility model.
Fig. 3 is a cross-sectional view of a battery pack according to an embodiment of the present utility model taken along the direction A-A in fig. 1.
Fig. 4 is a partially exploded view of a battery pack according to an embodiment of the present utility model.
Fig. 5 is a schematic diagram illustrating the arrangement of the battery cells according to an embodiment of the utility model.
Description of the reference numerals
Battery pack 1
Bottom plate 4
Upper plate 5
Lower plate 6
First cavity 7
Confluence sheet 9
Insulating and heat conducting member 10
First insulating support 11
Second insulating support 12
Reinforcing rib 16
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown.
The utility model provides a battery pack 1, as shown in fig. 1-3, the battery pack 1 comprises a battery cell group 2 and a battery box 3, wherein the battery cell group 2 comprises a plurality of battery cells, and a pressure release valve 20, a positive pole column and a negative pole column are arranged on the bottom of each battery cell; the plurality of battery cells are arranged in parallel in the same direction; the battery box 3 comprises a bottom plate 4 and side beams which are arranged around the bottom plate 4, a containing space is formed by the bottom plate 4 and the side beams and used for containing the battery cell groups 2, the pressure relief valve is arranged towards the bottom plate 4, the bottom plate 4 comprises an upper plate 5 and a lower plate 6, a first cavity 7 and a second cavity 8 are arranged between the upper plate 5 and the lower plate 6, the first cavity 7 and the second cavity 8 are not communicated with each other, and the position of the first cavity 7 is correspondingly arranged below the pressure relief valve on the battery cells 19 and is communicated with the pressure relief valve; the second cavity 8 is used for introducing cooling liquid, and the position of the second cavity 8 is correspondingly arranged below the positive pole and the negative pole, however, in other embodiments, the position of the second cavity can be correspondingly arranged below the positive pole or the negative pole, and the cooling of the battery cell can be realized. In this embodiment, two cell groups 2 are provided, and of course, in other embodiments, the number of cell groups 2 may be reasonably set according to the actual situation.
The battery cell group 2 comprises a plurality of battery cells 19, a pressure release valve 20, a positive pole column and a negative pole column are arranged at the bottom of each battery cell 19, the pressure release valves on the battery cells are arranged towards the bottom plate 4 of the battery box 3, a first cavity 7 and a second cavity 8 are arranged at the bottom of the battery box 3, the positions of the first cavities 7 are correspondingly arranged below the pressure release valves 20 on the battery cells 19 and are communicated with the pressure release valves 20, and high-temperature gas discharged in the battery cells 19 can be timely guided out when the battery cells 19 are out of control, so that the risk of series explosion or ignition of the battery cells is reduced; the second cavity 8 is used for introducing cooling liquid, and the position of the second cavity 8 is correspondingly arranged below the positive pole and the negative pole, so that the battery cell can be cooled in time.
The upper plate 5 is provided with an exhaust hole (not shown in the figure) at a position corresponding to the pressure release valve 20 on the battery cell 19, and the first cavity 7 is communicated with the pressure release valve 20 through the exhaust hole. The upper layer plate 5 is provided with an exhaust hole at a position corresponding to the pressure release valve 20 on the battery core 19, so that the first cavity 7 is communicated with the pressure release valve, and high-temperature exhaust gas after the pressure release valve is opened can enter the first cavity 7 through the exhaust hole.
As shown in fig. 3, the thickness of the upper layer plate 5 corresponding to the area where the first cavity 7 is located is smaller than the thickness of the lower layer plate 6 corresponding to the area where the first cavity 7 is located, so that the upper layer plate 5 in the area where the first cavity 7 is located is easier to melt, high-temperature exhaust can quickly pass through, and the lower layer plate 6 in the area where the first cavity 7 is located can have better strength and can provide better supporting performance.
As shown in fig. 4, for convenience in showing the specific structure of the battery pack 1, fig. 4 shows a schematic view of the pressure release valve, the positive electrode post, and the negative electrode post of the battery cell located above. As shown in fig. 4, the battery cell group 2 further includes a first insulating support 11 and a second insulating support 12, the positions of the first insulating support 11 and the second insulating support 12 corresponding to the positive electrode post and the negative electrode post of the battery cell are respectively disposed on the plurality of battery cells 19, the first insulating support is provided with a plurality of first mounting grooves 13, the second insulating support 12 is provided with a plurality of second mounting grooves 14, the first mounting grooves 13 and the second mounting grooves 14 respectively avoid the positive electrode post and the negative electrode post, so that the positive electrode post and the negative electrode post are exposed relative to the first insulating support 11 and the second insulating support 12, the plurality of first mounting grooves 13 and the plurality of second mounting grooves 14 respectively install a bus bar 9, and the bus bar 9 contacts with the positive electrode post or the negative electrode post to realize serial connection or parallel connection of the adjacent battery cells. In the present embodiment, the fixation of the cell group 2 is achieved by the first insulating holder 11 and the second insulating holder 12, and the series connection and parallel connection of the cells are achieved by providing the bus bar 9 in the first mounting groove 13 of the first insulating holder 11 and the second mounting groove 14 of the second holder. In this embodiment, two battery cell groups 2 are provided, and the first insulating support 11 and the second insulating support 12 located between two adjacent battery cell groups 2 are integrally provided, so that not only can the connection between two adjacent battery cell groups 2 be reinforced, but also the operation can be simplified, and of course, in other embodiments, the first insulating support 11 and the second insulating support 12 located between two adjacent battery cell groups 2 can also be separately provided.
As shown in fig. 4, the busbar 9 is further connected with an insulating and heat conducting member 10, and the busbar 9 and the bottom plate 4 are connected by the insulating and heat conducting member 10. Connect through insulating heat conduction spare 10 between with converging piece 9 and bottom plate 4, through insulating heat conduction spare 10 with converging the heat transfer on the piece 9 to the bottom plate 4, can further strengthen the efficiency of heat conduction, improve the cooling rate to the electric core.
Preferably, the insulating and heat conducting member 10 is a heat conducting glue, which not only can realize heat conduction, but also can enable adhesion connection between the bus bar 9 and the bottom plate 4, and of course, in other alternative embodiments, the insulating and heat conducting member 10 is not limited to the heat conducting glue, and may also be provided as a heat conducting pad, and of course, the heat conducting glue and the heat conducting pad may also be mixed in the plurality of insulating and heat conducting members 10, that is, a part of the insulating and heat conducting members 10 are heat conducting glue, and another part of the insulating and heat conducting members 10 are heat conducting pads.
As shown in fig. 1-2, the side beam of the battery box 3 is provided with a water inlet joint 17 and a water return joint 18 which are communicated with the second cavity. And a water inlet connector 17 and a water return connector 18 which are communicated with the second cavity are arranged on the side beam of the battery box 3, so that cooling liquid can be conveniently introduced and discharged.
As shown in fig. 5, the cell group includes a heat insulating plate 15 and a reinforcing rib 16, the heat insulating plate 15 and the reinforcing rib 16 are alternately arranged between two adjacent cells, in this scheme, the cell group 2 includes the heat insulating plate 15 and the reinforcing rib 16, and the heat insulating plate 15 and the reinforcing rib 16 are alternately arranged between two adjacent cells, so that heat transfer between the cells can be blocked, and structural strength of the cell group 2 can be enhanced. Of course, in other embodiments, the cell stack may include heat shields 15 or ribs 16, with the heat shields 15 or ribs 16 disposed between adjacent cells 19. The heat insulation plate 15 is arranged between the two adjacent electric cores 19, so that the time for transmitting heat to the adjacent electric cores after one electric core fails in a thermal runaway manner can be delayed, and the probability of failure of the adjacent electric cores is reduced or avoided; the provision of the reinforcing ribs 16 between two adjacent cells can enhance the structural strength of the cell stack 2. Preferably, the heat shield 15 is foam.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the utility model, but such changes and modifications fall within the scope of the utility model.
Claims (10)
1. A battery pack, the battery pack comprising:
the battery cell group comprises a plurality of battery cells, and a pressure release valve, a positive pole column and a negative pole column are arranged at the bottom of each battery cell; the plurality of battery cells are arranged in parallel in the same direction;
the battery box comprises a bottom plate and side beams surrounding the periphery of the bottom plate, wherein a containing space is formed by the bottom plate and the side beams and used for containing the battery cell group, the pressure release valve is arranged towards the bottom plate, the bottom plate comprises an upper plate and a lower plate, a first cavity and a second cavity are formed between the upper plate and the lower plate, the first cavity is not communicated with the second cavity, and the position of the first cavity is correspondingly arranged below the pressure release valves on the battery cells and is communicated with the pressure release valves; the second cavity is used for introducing cooling liquid, and the position of the second cavity is correspondingly arranged below the positive pole and the negative pole.
2. The battery pack of claim 1, wherein the upper plate is provided with an exhaust hole at a position corresponding to the pressure release valve on the cell, and the first cavity is communicated with the pressure release valve through the exhaust hole.
3. The battery pack of claim 1, wherein the thickness of the upper plate in the region corresponding to the first cavity is smaller than the thickness of the lower plate in the region corresponding to the first cavity.
4. The battery pack according to claim 2, wherein the battery cell group further comprises a first insulating support and a second insulating support, positions of the first insulating support and the second insulating support, corresponding to positions of the positive electrode post and the negative electrode post of the battery cell respectively, are arranged on the battery cells, a plurality of first mounting grooves are formed in the first insulating support, a plurality of second mounting grooves are formed in the second insulating support, the first mounting grooves and the second mounting grooves are respectively formed in the second insulating support so as to avoid the positive electrode post and the negative electrode post respectively, the positive electrode post and the negative electrode post are exposed relative to the first insulating support and the second insulating support respectively, and a plurality of first mounting grooves and a plurality of second mounting grooves are respectively provided with a bus bar, and the bus bar is in contact with the positive electrode post or the negative electrode post to realize connection of adjacent battery cells.
5. The battery pack according to claim 4, wherein the bus bar is connected to the base plate through an insulating heat conductive member.
6. The battery pack of claim 5, wherein the insulating and thermally conductive member is a thermally conductive paste.
7. The battery pack of claim 6, wherein the side rail of the battery box is provided with a water inlet connector and a water return connector in communication with the second cavity.
8. The battery pack of claim 1, wherein the cell stack comprises a heat shield or a reinforcing rib, the heat shield or the reinforcing rib being disposed between adjacent two of the cells.
9. The battery pack of claim 1, wherein the cell stack comprises heat shields and reinforcing ribs, the heat shields and the reinforcing ribs being alternately disposed between adjacent ones of the cells.
10. The battery pack of claim 8 or 9, wherein the heat shield is foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223598816.8U CN219203334U (en) | 2022-12-29 | 2022-12-29 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223598816.8U CN219203334U (en) | 2022-12-29 | 2022-12-29 | Battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219203334U true CN219203334U (en) | 2023-06-16 |
Family
ID=86714991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223598816.8U Active CN219203334U (en) | 2022-12-29 | 2022-12-29 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219203334U (en) |
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2022
- 2022-12-29 CN CN202223598816.8U patent/CN219203334U/en active Active
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