CN-122025977-A - New energy automobile battery case with heat dissipation function

CN122025977ACN 122025977 ACN122025977 ACN 122025977ACN-122025977-A

Abstract

The invention relates to the technical field of new energy automobile batteries, and particularly discloses a new energy automobile battery shell with a heat dissipation function. The device comprises a heat conduction supporting cylinder, a vertical water baffle and a sliding piston connected with a trigger ejector rod, wherein under the conventional working condition, a cooling medium is guided by the water baffle to form a U-shaped flow channel so as to realize heat dissipation of a battery, when a chassis encounters a bottom supporting collision, a protective plate deforms and pushes the trigger ejector rod, the driving piston moves upwards to instantly shield a liquid inlet and a liquid outlet, the hydraulic feedback is generated by utilizing the incompressible characteristic of closed cooling liquid, the hollow supporting cylinder is instantly converted into a high-rigidity hydraulic supporting column, the flow channel can be directly driven to be blocked by collision deformation, the compression rigidity of a hit area of the battery shell is greatly improved, the invasion of external deformation is effectively resisted, and the safety protection performance of the battery shell is improved.

Inventors

YANG ERJIE
LI LI
BAI KE

Assignees

成都融畅易和科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260415

Claims (9)

1. The utility model provides a new energy automobile battery case with heat dissipation function, includes the shell body, the upper portion opening of shell body and undercut form the battery accommodation chamber that is used for holding power battery the bottom of battery accommodation chamber is equipped with the cooling chamber, just the cooling chamber with separate through the heat conduction baffle between the battery accommodation chamber, characterized in that, still install the collision backplate in the bottom of shell body, there is the clearance between collision backplate and the bottom plate of shell body, the inside of cooling chamber is equipped with a plurality of heat transfer supporting units, a plurality of heat transfer supporting unit arrays distribute and in the cooling chamber forms the cooling bypass flow channel of latticed; The heat exchange supporting unit comprises a heat conduction supporting cylinder, a vertical water baffle and a sliding piston, wherein two ends of the heat conduction supporting cylinder are fixedly connected with a heat conduction baffle and a bottom plate of the outer shell respectively, the vertical water baffle is fixedly arranged inside the heat conduction supporting cylinder, the sliding piston is sleeved in the heat conduction supporting cylinder in an axial sliding manner and is positioned at the lower part of the vertical water baffle, liquid inlets and liquid outlets are respectively formed in the outer walls of two sides of the heat conduction supporting cylinder, the vertical water baffle is positioned between the liquid inlets and the liquid outlets and extends upwards so as to divide the heat conduction supporting cylinder into U-shaped heat exchange channels, the bottom ends of the liquid inlets and the liquid outlets are flush with the top ends of the sliding piston and are respectively communicated with the cooling flow-around channels, and therefore cooling medium is shunted into the heat conduction supporting cylinder and flows through the U-shaped heat exchange channels when flowing in the cooling flow-around channels; The upper end face of the sliding piston is provided with a sliding avoidance groove matched with the vertical water baffle, the bottom of the sliding piston is connected with a trigger ejector rod which extends downwards into a gap between the collision guard plate and the bottom plate, and the trigger ejector rod penetrates through the bottom plate of the outer shell and is in sliding sealing with the bottom plate.
2. The new energy automobile battery shell with the heat dissipation function according to claim 1, wherein a plurality of water blocking plates are arranged on the two side surfaces of the vertical water blocking plate in an extending mode, and free ends of the water blocking plates are arranged in an upward inclined mode.
3. The new energy automobile battery shell with the heat dissipation function as set forth in claim 1, wherein the liquid inlet and the liquid outlet are flat strip holes, and the width of the openings in the circumferential direction is larger than the height of the openings in the axial direction.
4. The new energy automobile battery shell with the heat dissipation function according to claim 3, wherein a redundant distance exists between the bottom end of the trigger ejector rod and the collision guard plate, and the overhanging length of the trigger ejector rod in the gap is larger than the opening height of the flat strip hole in the axial direction.
5. The new energy automobile battery shell with the heat dissipation function according to claim 3, wherein an elastic air bag is further arranged between the inside of the sliding avoidance groove and the bottom end of the vertical water baffle, a gas medium is filled in the elastic air bag, and when the sliding piston slides in the heat conduction supporting cylinder, the elastic air bag is extruded by the vertical water baffle.
6. The new energy automobile battery shell with the heat dissipation function according to claim 5, wherein a plurality of fire extinguishing capsules are further arranged on the periphery of the inner wall of the battery accommodating cavity, fire extinguishing media are filled in the fire extinguishing capsules, pressure rupture membranes are arranged at positions, facing the battery accommodating cavity, of the fire extinguishing capsules, the fire extinguishing capsules are communicated with the elastic air bags through pressure guide hoses penetrating through the vertical water baffle and the heat conducting partition plates, and one-way pressure valves are further arranged on the pressure guide hoses; When the sliding piston slides upwards to completely shield the liquid inlet or the liquid outlet, the one-way pressure valve is pressed and conducted and guides the gas medium in the elastic air bag to enter the fire extinguishing capsule, so that the pressure rupture membrane is forced to be pressed and ruptured and drives the fire extinguishing medium to be sprayed into the battery accommodating cavity.
7. The new energy automobile battery shell with the heat dissipation function according to claim 3, wherein a flexible pressure sensing film is further attached to the inner wall of the heat conduction supporting cylinder.
8. The new energy automobile battery shell with the heat dissipation function according to claim 1, wherein the outer shell is further provided with a filling port and a discharging port which are communicated with the cooling cavity, the filling port and the discharging port are connected with an external heat exchanger through a circulating pipeline, the circulating pipeline is provided with a circulating pump for driving cooling medium to flow in the cooling cavity, and the filling port and the discharging port are respectively positioned on two opposite sides of the outer shell.
9. The new energy automobile battery shell with the heat dissipation function according to claim 5, wherein a layer of heat-conducting silica gel pad which is in contact with a power battery is adhered to the inner wall of the battery accommodating cavity, a plurality of counter bores are formed in the surface of the heat-conducting silica gel pad, and the fire extinguishing capsule is adaptively installed in the counter bores.

Description

New energy automobile battery case with heat dissipation function Technical Field The invention relates to the technical field of new energy automobile batteries, in particular to a new energy automobile battery shell with a heat dissipation function. Background Along with the improvement of the energy density of the power battery of the new energy automobile, the heat exchange efficiency of the battery module and the structural safety of the shell become the core of the design. At present, a cooling cavity is usually arranged at the bottom of a power battery shell, and the heat of a module is taken away through the circulation flow of a cooling medium in the cavity so as to maintain the normal working temperature of a battery system. However, the existing battery shell structure still presents significant limitations when facing extreme working conditions, namely, the existing shell bottom structure is extremely easy to generate serious instability deformation or collapse when suffering chassis support or severe collision, so that external impact load is directly transmitted to the upper battery module, physical extrusion damage of the battery monomer is induced, sufficient local supporting rigidity is difficult to provide under transient load to resist invasive deformation, and safety guarantee is insufficient. In summary, there is still room for improvement in the comprehensive protection performance of the existing battery case under the extreme collision condition, so the present solution provides a new energy automobile battery case with heat dissipation function. Disclosure of Invention In order to overcome the above-mentioned drawbacks of the prior art, the present invention provides a new energy automobile battery case with heat dissipation function, so as to solve at least one of the above-mentioned problems in the prior art. In order to achieve the above purpose, the present invention provides the following technical solutions: The utility model provides a new energy automobile battery case with heat dissipation function, includes the shell body, the upper portion opening of shell body and undercut form the battery accommodation chamber that is used for holding power battery the bottom of battery accommodation chamber is equipped with the cooling chamber, just cooling chamber with the battery accommodation chamber is separated through the heat conduction baffle between, the bottom of shell body is still installed the collision backplate, there is the clearance between collision backplate and the bottom plate of shell body, the inside of cooling chamber is equipped with a plurality of heat transfer supporting units, a plurality of heat transfer supporting unit array distributes and in the cooling chamber forms the cooling bypass passageway of grid form; The heat exchange supporting unit comprises a heat conduction supporting cylinder, a vertical water baffle and a sliding piston, wherein two ends of the heat conduction supporting cylinder are fixedly connected with a heat conduction baffle and a bottom plate of the outer shell respectively, the vertical water baffle is fixedly arranged inside the heat conduction supporting cylinder, the sliding piston is sleeved in the heat conduction supporting cylinder in an axial sliding manner and is positioned at the lower part of the vertical water baffle, liquid inlets and liquid outlets are respectively formed in the outer walls of two sides of the heat conduction supporting cylinder, the vertical water baffle is positioned between the liquid inlets and the liquid outlets and extends upwards so as to divide the heat conduction supporting cylinder into U-shaped heat exchange channels, the bottom ends of the liquid inlets and the liquid outlets are flush with the top ends of the sliding piston and are respectively communicated with the cooling flow-around channels, and therefore cooling medium is shunted into the heat conduction supporting cylinder and flows through the U-shaped heat exchange channels when flowing in the cooling flow-around channels; The upper end face of the sliding piston is provided with a sliding avoidance groove matched with the vertical water baffle, the bottom of the sliding piston is connected with a trigger ejector rod which extends downwards into a gap between the collision guard plate and the bottom plate, and the trigger ejector rod penetrates through the bottom plate of the outer shell and is in sliding sealing with the bottom plate. Further, a plurality of water blocking plates are arranged on the surfaces of the two sides of the vertical water blocking plate in an extending mode, and the free ends of the water blocking plates are arranged in an upward inclined mode. Further, the liquid inlet and the liquid outlet are flat strip holes, and the width of the openings in the circumferential direction is larger than the height of the openings in the axial direction. Further, a redundant space exists between the bottom end of the tr