CN218300052U - Lower box structure, power battery and electric vehicle - Google Patents
Lower box structure, power battery and electric vehicle Download PDFInfo
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- CN218300052U CN218300052U CN202221950632.0U CN202221950632U CN218300052U CN 218300052 U CN218300052 U CN 218300052U CN 202221950632 U CN202221950632 U CN 202221950632U CN 218300052 U CN218300052 U CN 218300052U
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- cross beam
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- 238000001816 cooling Methods 0.000 claims abstract description 42
- 239000012530 fluid Substances 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 238000012546 transfer Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 5
- 238000007654 immersion Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000009194 climbing Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 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 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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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 application relates to a lower box body structure, a power battery and an electric vehicle, wherein the lower box body structure comprises a first cross beam, a second cross beam, a third cross beam, a first edge beam, a second edge beam and a water cooling plate, wherein the first edge beam is fixedly connected with the second edge beam through the first cross beam, the second cross beam and the third cross beam; the water cooling plate is fixedly connected with the first cross beam, the second cross beam, the third cross beam, the first edge beam and the second edge beam, and forms a sealed installation space with the first cross beam, the second cross beam, the third cross beam, the first edge beam and the second edge beam, wherein the installation space is used for installing the battery cell and filling dielectric fluid, and the filling dielectric fluid is used for immersing the battery cell; the water cooling plate is a bottom plate of a lower box body structure. This application has bigger heat transfer area to have higher heat transfer efficiency. In addition, this application still has advantages such as the security is higher, the difference in temperature is lower.
Description
Technical Field
The application relates to a power battery mounting structure, in particular to a lower box body structure, a power battery and an electric vehicle.
Background
At present, on the basis of consideration of technology, process maturity and processing cost, a scheme of stamping type liquid cooling plates based on a CTP structure of a power battery pack is selected for domestic and overseas mainstream new energy automobiles, and the scheme of stamping type liquid cooling plates has the advantages of high structural strength, high thermal management efficiency and the like, and specifically comprises the following steps: (1) In the aspect of structural strength, a stamped aluminum plate is adopted, so that the flatness can be better controlled, the contact area with the surface of a module is large, the thermal resistance is small, and the thermal management efficiency is improved; (2) In the aspect of heat management efficiency, the contact area of the flow channel is large, the temperature difference between the upper part and the lower part inside the single battery can be effectively reduced, and the battery is well protected during rapid charging and discharging and low-temperature preheating. In addition, the punching press formula liquid cold plate is integrated to outside at power battery package as an solitary part, saves occupation space, reduce cost, but also can accomplish dry wet separation, and its coolant liquid if reveal, can not form the short circuit with high-pressure spare parts contact such as module, busbar, can not lead to the incident such as battery package short circuit fire, from the long-term, is favorable to new energy automobile's development requirement very much.
However, at present, most liquid-cooled plates only contact one surface of a battery cell, the battery cell is composed of multiple layers of materials (positive electrode, negative electrode, diaphragm and electrolyte), resistance exists in the layers, contact resistance exists between the layers, and the battery internal resistance is formed by the resistance. Due to the inconsistency between layers, the passing current and the SOC of each layer are inconsistent, so that the aging lithium precipitation and the life decay of the battery cell are caused, and a thermal runaway event is caused if the battery cell is serious; on the other hand, the convenience of charging at the present stage is one of the main subjects restricting the development of new energy vehicles, the traditional liquid cooling plate has limited heat exchange capability due to limited contact area, and if the traditional liquid cooling plate meets the superposition conditions of high-speed climbing, high-power quick charging and the like, the temperature difference is very large, so that the dynamic property and the endurance mileage of the whole vehicle are influenced, and the requirements of charging high-rate battery cells of 4C and above cannot be met, so that the competitiveness of products is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a lower box structure, power battery and electric motor car, this lower box structure, power battery and electric motor car have bigger heat transfer area.
In a first aspect, the present invention provides a lower box structure, which includes a first beam, a second beam, a third beam, a first edge beam, a second edge beam, and a water-cooling plate;
the first edge beam is fixedly connected with the second edge beam through the first cross beam, the second cross beam and the third cross beam;
the water cooling plate is fixedly connected with the first cross beam, the second cross beam, the third cross beam, the first edge beam and the second edge beam, and forms a sealed installation space with the first cross beam, the second cross beam, the third cross beam, the first edge beam and the second edge beam, wherein the installation space is used for installing the battery cell and filling dielectric fluid, and the filling dielectric fluid is used for immersing the battery cell;
the water cooling plate is a bottom plate of a lower box body structure.
In this application first aspect, the water-cooling board can with a crossbeam, the second crossbeam, the third crossbeam, first boundary beam with second boundary beam fixed connection, and with a crossbeam, the second crossbeam, the third crossbeam, first boundary beam with the second boundary beam forms sealed installation space, so, just can be through installation space installation electric core and filling dielectric fluid, wherein, fill dielectric fluid can submerge electric core.
Compared with the prior art, because the installation space can be filled with dielectric fluid, and then the dielectric fluid can submerge the battery core, the dielectric fluid can contact with the front side, the rear side, the left side and the right side of the battery core, the heat exchange area of the battery core is increased, the heat exchange efficiency of the battery is finally increased, and the service life of the battery is prolonged.
On the other hand, the water cooling plate is used as a bottom plate of the lower box body structure and can be contacted with the bottom surface of the battery cell, so that heat exchange can be carried out on the bottom surface of the battery cell, and the heat exchange area of the battery cell is further improved. Meanwhile, since the water-cooling plate serves as a bottom plate of the lower case structure, the water-cooling plate can also cool the dielectric fluid filled in the installation space.
In an optional embodiment, the installation space includes a plurality of battery cell limiting grooves, and the battery cell is installed in the battery cell limiting grooves, where the number of the battery cell limiting grooves matches with the size of the battery cell and the layout manner of the battery cell.
In the optional embodiment, the battery cell can be installed and fixed and limited by the plurality of battery cell limiting grooves, wherein the number of the battery cell limiting grooves is matched with the size of the battery cell and the layout mode of the battery cell.
In an alternative embodiment, the mounting space comprises a first mounting region, a second mounting region, the first mounting region and the second mounting region being separated by the second cross member.
In this alternative embodiment, the second crosspiece mounting space is divided into the first mounting region and the second mounting region, so that the fluidity of the dielectric fluid can be reduced.
In an alternative embodiment, the lower box structure comprises a baffle plate, which is located above the installation space and is fixedly connected to the first cross member and the second cross member.
In this alternative embodiment, the dielectric fluid can be prevented from splashing by the baffle.
In an alternative embodiment, the water-cooled panels are extruded from an aluminum profile.
This optional embodiment forms the water-cooling board through aluminium alloy extrusion mode, can utilize the heat conductivity of aluminium to improve the heat conductivity of water-cooling board to and utilize the lighter advantage of aluminium, reduce the weight of water-cooling board.
In an optional embodiment, the water-cooling plate is coated with a heat-conducting structural adhesive, and the water-cooling plate is in contact with the battery cell through the heat-conducting structural adhesive.
This optional embodiment is glued through heat conduction structure, can improve the heat exchange efficiency of water-cooling board and electric core.
In an optional embodiment, the lower box structure further includes a water inlet pipe and a water outlet pipe, wherein the water inlet pipe and the water outlet pipe are communicated with the water-cooling plate.
This optional embodiment, through water inlet pipe mouth and water outlet pipe mouth, can make cooling water circulate in the water-cooling board.
In an optional embodiment, the lower box structure further includes a mounting bracket, wherein the mounting bracket is fixedly connected to the first edge beam and the second edge beam, and the mounting bracket is used for mounting a battery management system and a battery pack cutting unit.
The battery management system and the battery pack cutting unit may be mounted through the mounting bracket in this alternative embodiment.
In a second aspect, the present invention provides a power battery comprising a lower case structure according to any one of the preceding embodiments.
The power battery of this application second aspect has bigger heat transfer area, and its heat exchange efficiency is higher, and on the other hand, it has the advantage such as the difference in temperature is low.
In a third aspect, the invention provides an electric vehicle comprising a power battery as described in the previous embodiments.
Since the electric vehicle of the third aspect of the present application has the power battery of the second aspect of the present application, it has all the advantages of the power battery of the second aspect of the present application.
Additional features and advantages of the present application will be described in detail in the detailed description which follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural diagram of a lower box structure according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of another lower box structure disclosed in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a re-seeding lower box structure disclosed in the embodiments of the present application
Icon: 1-a first beam; 2-a second cross beam; 3-third horizontal; 4-a first edge beam; 5-a second edge beam; 6-water cooling board.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
Referring to fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic structural diagram of a lower box structure disclosed in an embodiment of the present application, fig. 2 is a schematic structural diagram of another lower box structure disclosed in the embodiment of the present application, and fig. 3 is a schematic structural diagram of another lower box structure disclosed in the embodiment of the present application. As shown in fig. 1, 2, and 3, the lower tank structure of the embodiment of the present application includes a first beam 1, a second beam 2, a third beam 3, a first edge beam 4, a second edge beam 5, and a water-cooling plate 6, where the first edge beam 4 is fixedly connected to the second edge beam 5 through the first beam 1, the second beam 2, and the third beam 3, and forms a sealed installation space with the first beam, the second beam 2, the third beam 3, the first edge beam 4, and the second edge beam 5, where the installation space is used to install a cell and is filled with a dielectric fluid, and the dielectric fluid is used to immerse the cell.
In the embodiment of the present application, as shown in fig. 1, the water-cooled plate 6 is a bottom plate of the lower tank structure.
In the embodiment of the present application, the first beam 1, the second beam 2, and the third beam 3 are arranged at intervals along the length direction of the power battery, for example, the first beam 1, the second beam 2, and the third beam 3 are arranged at equal intervals along the length direction of the power battery.
In the embodiment of the present application, specifically, the first side beam 4 and the second side beam 5 each include a side plate, and accordingly, the first cross beam 1, the second cross beam 2, and the third cross beam 3 also include side plates, so that the side plate of the first side beam 4, the side plate of the second side beam 5, the side plate of the first cross beam 1, and the side plate of the third cross beam 3 can be used as a box side plate of the box structure, thereby forming an installation space.
In the embodiment of the present application, specifically, the first cross member 1, the second cross member 2, and the third cross member 3 are all welded to the first side member 4 and the second side member 5 by friction stir welding.
In the first aspect of the present application, the water-cooling plate 6 can be fixedly connected to the first cross beam, the second cross beam 2, the third cross beam 3, the first side beam 4 and the second side beam 5, and form a sealed installation space with the first cross beam, the second cross beam 2, the third cross beam 3, the first side beam 4 and the second side beam 5, so that the cell and the dielectric fluid can be installed in the installation space, wherein the dielectric fluid can submerge the cell.
Compared with the prior art, because installation space can fill dielectric fluid, and then dielectric fluid can submergence electric core for dielectric fluid can contact with electric core leading flank, trailing flank, left surface and right flank, thereby improves electric core heat transfer area, finally improves the heat exchange efficiency of battery, improves the life of battery.
On the other hand, the water cooling plate 6 is used as a bottom plate of the lower box structure and can be contacted with the bottom surface of the battery cell, so that heat exchange can be carried out on the bottom surface of the battery cell, and the heat exchange area of the battery cell is further improved. Meanwhile, since the water-cooling plate 6 serves as a bottom plate of the lower case structure, the water-cooling plate 6 can also cool the dielectric fluid filled in the installation space.
On the other hand, because the battery core is immersed in the dielectric fluid, the dielectric fluid can directly contact the battery core, a uniform heat transfer path with high heat capacity is provided for the battery core, the heat contact resistance in an indirect cooling system is reduced, and the temperature uniformity is greatly ensured, for example, the temperature difference of a battery pack can be accurately controlled to 5 ℃ from the original 15 ℃.
In another aspect, the immersed dielectric fluid is a good thermal runaway monitoring medium, so that the temperature of the battery cell can be monitored in real time through embedding NTC and other sensors, a data basis is provided for the pre-judgment of the thermal runaway of the battery cell, and further, the immersed dielectric fluid is also a flame retardant and can be used as a fire extinguishing agent to inhibit the occurrence of the thermal runaway, so that the safety of the battery pack is improved.
In an embodiment of the present application, the dielectric fluid may be one of hydrocarbon oil, silicone oil, and fluorinated hydrocarbon.
In the embodiment of the present application, the immersion depth of the dielectric fluid may be adaptively determined by combining the size of the cell, the layout manner, and the thermal management simulation result, for example, a semi-immersion type immersion depth, a 2/3 immersion depth, and the like may be adopted.
In an embodiment of the application, the lower tank structure further comprises a high pressure pump, wherein the high pressure pump is adapted to circulate the dielectric fluid for heat exchange.
In the embodiment of the application, the width, the depth and the water channel direction of the water cooling plate 6 can be adaptively optimized by combining the heat management simulation and the experimental result.
In an optional embodiment, the installation space includes a plurality of battery cell limiting grooves, and the battery cells are installed in the battery cell limiting grooves, wherein the number of the battery cell limiting grooves matches with the size of the battery cells and the layout mode of the battery cells. This optional implementation mode can install and fix the electric core and limit the electric core through a plurality of electric core limiting grooves, wherein the number of the electric core limiting grooves matches with the size of the electric core and the layout mode of the electric core, for example, when the size of the electric core is a, the number of the electric core limiting grooves may be 6.
In an alternative embodiment, the mounting space comprises a first mounting area, a second mounting area, which are separated by the second cross member 2. In the alternative embodiment, the mounting space of the second beam 2 is divided into the first mounting region and the second mounting region, so that the fluidity of the dielectric fluid can be reduced.
In an alternative embodiment, the lower box structure comprises a baffle, which is located above the installation space and is fixedly connected to the first cross beam 1 and the second cross beam 2. In this alternative embodiment, the dielectric fluid can be prevented from splashing by the baffle.
In an alternative embodiment, the water-cooled panels 6 are extruded from an aluminium profile. This optional embodiment forms water-cooling panel 6 through aluminium alloy extrusion mode, can utilize the heat conductivity of aluminium to improve water-cooling panel 6's heat conductivity, and utilize the lighter advantage of aluminium, reduce water-cooling panel 6's weight.
In an alternative embodiment, the water-cooling plate 6 is coated with a heat-conducting structural adhesive, and the water-cooling plate 6 is in contact with the battery cell through the heat-conducting structural adhesive. This optional embodiment is glued through heat conduction structure, can improve the heat exchange efficiency of water-cooling board 6 and electric core.
In an alternative embodiment, the lower box structure further comprises a water inlet nozzle and a water outlet nozzle, wherein the water inlet nozzle and the water outlet nozzle are communicated with the water-cooled plate 6. In this alternative embodiment, the cooling water can be circulated through the water-cooled panels 6 by means of water inlet and outlet nozzles.
In this continuous embodiment, the water inlet and outlet both have a normal open mode and a Plus mode, wherein when the vehicle is in working conditions such as high speed climbing, high power quick charging, etc., the water inlet and outlet are in the Plus mode to improve the water circulation of the water cooling plate 6, thereby improving the heat exchange efficiency.
In an alternative embodiment, the lower box structure further comprises a high pressure cooling pump, wherein the high pressure cooling pump is used for circulating the dielectric fluid.
In an alternative embodiment, the lower box structure further comprises a mounting bracket, wherein the mounting bracket is fixedly connected with the first edge beam 4 and the second edge beam 5, and the mounting bracket is used for mounting the battery management system and the battery pack cutting unit.
The battery management system and the battery pack cutting unit may be mounted through the mounting bracket in this alternative embodiment.
In addition, the embodiment of the application also provides a power battery, and the power battery comprises the lower box body structure according to any one of the previous embodiments.
The power battery of this application embodiment has bigger heat transfer area, and its heat exchange efficiency is higher, and on the other hand, it has the advantage such as the difference in temperature is low.
Further, the embodiment of the application also provides an electric vehicle, and the electric vehicle comprises the power battery of the previous embodiment.
Because the electric vehicle of the embodiment of the application has the power battery of the embodiment of the application, the electric vehicle has all the advantages of the power battery of the embodiment of the application.
It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A lower box body structure is characterized by comprising a first cross beam, a second cross beam, a third cross beam, a first edge beam, a second edge beam and a water cooling plate;
the first edge beam is fixedly connected with the second edge beam through the first cross beam, the second cross beam and the third cross beam;
the water cooling plate is fixedly connected with the first cross beam, the second cross beam, the third cross beam, the first edge beam and the second edge beam, and forms a sealed installation space with the first cross beam, the second cross beam, the third cross beam, the first edge beam and the second edge beam, wherein the installation space is used for installing the battery core and filling dielectric fluid, and the filling dielectric fluid is used for immersing the battery core;
the water cooling plate is a bottom plate of a lower box body structure.
2. The lower case structure of claim 1, wherein the installation space comprises a plurality of cell limiting grooves, and the cells are installed in the cell limiting grooves, wherein the number of the cell limiting grooves matches with the size of the cells and the layout manner of the cells.
3. The lower box structure of claim 1 wherein the mounting space includes a first mounting area, a second mounting area, the first mounting area and the second mounting area separated by the second cross member.
4. The lower box structure according to claim 1, wherein the lower box structure comprises a baffle plate positioned above the installation space and fixedly connected to the first cross member and the second cross member.
5. The lower box structure of claim 1, wherein the water-cooled panel is extruded from an aluminum profile.
6. The lower box structure of claim 1, wherein the water-cooled plate is coated with a thermally conductive structural adhesive, and the water-cooled plate is in contact with the cell through the thermally conductive structural adhesive.
7. The lower box structure of claim 1, further comprising a water inlet nozzle and a water outlet nozzle, wherein the water inlet nozzle and the water outlet nozzle are in communication with the water cooled panel.
8. The lower box structure of claim 1, further comprising a mounting bracket, wherein the mounting bracket is fixedly connected to the first and second edge beams, and the mounting bracket is used for mounting a battery management system and a battery pack cutting unit.
9. A power cell, characterized in that it comprises a lower case structure according to any one of claims 1 to 8.
10. An electric vehicle characterized by comprising the power battery according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221950632.0U CN218300052U (en) | 2022-07-26 | 2022-07-26 | Lower box structure, power battery and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221950632.0U CN218300052U (en) | 2022-07-26 | 2022-07-26 | Lower box structure, power battery and electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218300052U true CN218300052U (en) | 2023-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221950632.0U Active CN218300052U (en) | 2022-07-26 | 2022-07-26 | Lower box structure, power battery and electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218300052U (en) |
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- 2022-07-26 CN CN202221950632.0U patent/CN218300052U/en active Active
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