CN-121983733-A - Battery liquid cooling shell, battery pack and battery thermal management device

CN121983733ACN 121983733 ACN121983733 ACN 121983733ACN-121983733-A

Abstract

The invention discloses a battery liquid cooling shell, a battery pack and a battery thermal management device, which relate to the technical field of battery thermal management, wherein the battery liquid cooling shell comprises a bottom plate, an upper cover and a box-shaped frame structure, the box-shaped frame structure comprises a plurality of longitudinal partition plates and a plurality of transverse partition plates, the longitudinal partition plates and the transverse partition plates are mutually intersected and connected to divide a space between the bottom plate and the upper cover into a plurality of battery bins for accommodating battery monomers; the longitudinal partition plate, the transverse partition plate, the bottom plate and the upper cover are all hollow structures, cooling flow passages which are isolated from each other are formed in the longitudinal partition plate, the transverse partition plate, the bottom plate and the upper cover, each cooling flow passage is an independent flow passage unit, each flow passage unit is respectively provided with an independent cooling liquid inlet and an independent cooling liquid outlet, and heat is emitted into air through a fan and taken away by the air. The invention can improve the uniformity of the internal temperature of the battery pack, improve the cooling effect, reduce the number of parts, the volume and the weight of the system and improve the assembly efficiency and the reliability.

Inventors

CHEN XUEGENG
TIAN XINLIANG
HAN DIANLEI

Assignees

石河子大学
江苏大学

Dates

Publication Date: 20260505
Application Date: 20260209

Claims (10)

1. The battery liquid cooling shell comprises a bottom plate, an upper cover and a box-shaped frame structure arranged between the bottom plate and the upper cover, wherein the box-shaped frame structure comprises a plurality of longitudinal partition plates and a plurality of transverse partition plates, the longitudinal partition plates and the transverse partition plates are mutually intersected and connected to divide a space between the bottom plate and the upper cover into a plurality of battery bins for accommodating battery monomers, and the battery liquid cooling shell is characterized in that the longitudinal partition plates, the transverse partition plates, the bottom plate and the upper cover are hollow structures, cooling flow passages isolated from each other are formed in the longitudinal partition plates, the cooling flow passages of the transverse partition plates, the cooling flow passages of the bottom plate and the cooling flow passages of the upper cover are independent flow passage units, and each flow passage unit is respectively provided with an independent cooling liquid inlet and an independent cooling liquid outlet.
2. The battery liquid cooled enclosure of claim 1, wherein the intersection region of the longitudinal separator and the transverse separator is configured with an upper and lower double-layered separation structure such that the cooling flow channels in the longitudinal separator and the cooling flow channels in the transverse separator are spatially isolated from each other and are not in communication with each other.
3. The battery liquid cooled enclosure of claim 1, wherein the coolant inlet and coolant outlet of each of the longitudinal and transverse baffles are disposed on a side or end wall of the box frame.
4. The battery liquid cooled housing of claim 1, wherein the cooling flow path of the bottom plate comprises a plurality of bottom cooling flow paths that are independent of each other, the cooling fluid inlet and the cooling fluid outlet of each bottom cooling flow path being disposed at the end of the bottom plate, and the cooling flow path of the upper cover comprises a plurality of top cooling flow paths that are independent of each other, the cooling fluid inlet and the cooling fluid outlet of each bottom cooling flow path being disposed at the end of the upper cover.
5. The battery liquid cooled enclosure of claim 1, wherein the battery compartment is sized and shaped to receive a single square hard-shell battery cell.
6. A battery pack, comprising: the battery liquid cooled enclosure of any one of claims 1-5; the battery cells are arranged in the battery bins of the battery liquid cooling shell in a one-to-one correspondence mode.
7. A battery thermal management device is characterized by comprising a circulating water tank, a pumping system, a radiator and the battery liquid cooling shell according to any one of claims 1-6, wherein the circulating water tank, the radiator, the pumping system and cooling channels are communicated to form a plurality of first cooling liquid circulating loops, and one first cooling liquid circulating loop corresponds to one cooling channel.
8. The battery thermal management apparatus of claim 7, further comprising a heating element and a flow path switching valve block; the heating element is arranged inside the circulating water tank; the circulating water tank is provided with a first circulating water tank output end and a second circulating water tank output end; The flow path switching valve group comprises a first electromagnetic valve arranged on a pipeline where a first output end of the circulating water tank is located, and a second electromagnetic valve arranged on a pipeline where a second output end of the circulating water tank is located; the first output end of the circulating water tank is communicated with the input end of the pumping system through the radiator so as to form a plurality of first cooling liquid circulating loops together with all cooling flow passages of the battery liquid cooling shell; The second output end of the circulating water tank is directly communicated with the input end of the pumping system so as to form a plurality of second cooling liquid circulating loops together with all cooling flow passages of the battery liquid cooling shell; By controlling the opening and closing of the first electromagnetic valve and the second electromagnetic valve, the circulation of the cooling liquid can be switched between the first cooling liquid circulation loop flowing through the radiator and the second cooling liquid circulation loop flowing through the heating element in the circulation water tank.
9. The battery thermal management apparatus of claim 8, further comprising a temperature control system in signal connection with the pumping system, the heat sink and the flow path switching valve block for controlling opening and closing of the first solenoid valve and the second solenoid valve according to the detected battery temperature information and/or coolant temperature information to automatically select and switch to the first coolant circulation loop or the second coolant circulation loop.
10. The battery thermal management apparatus according to claim 7, wherein a recessed structure is provided on a tank body of the circulation water tank, and a driving motor of the pumping system and/or a radiator fan motor of the radiator are embedded and fixed in the recessed structure; The radiator also comprises a fluid supplementing box, wherein the fluid supplementing box is communicated with the circulating water tank or the cooling fluid flow path in the radiator, and the liquid level of the fluid supplementing box is higher than that of the cooling fluid flow path in the radiator.

Description

Battery liquid cooling shell, battery pack and battery thermal management device Technical Field The invention relates to the technical field of battery thermal management, in particular to a battery liquid cooling shell, a battery pack and a battery thermal management device. Background With the rapid development of the fields of electric automobiles, energy storage systems and the like, high-performance batteries such as lithium ion batteries and the like are widely applied due to the high energy density. The battery can generate a large amount of heat in the charge and discharge process, if the heat cannot be timely and uniformly emitted, the battery temperature is too high, and the temperature difference inside the module is too large, so that the cycle life, the safety and the service performance of the battery are seriously affected. Liquid cooling has become the mainstream thermal management solution because of its high heat capacity and high heat exchange efficiency. The common liquid cooling scheme is to arrange an independent liquid cooling plate at the side or bottom of the battery module, wherein the cooling liquid flows in an internal flow channel (such as a snake-shaped flow channel and an S-shaped flow channel) of the liquid cooling plate, and indirect heat exchange is carried out between the cooling liquid and the battery through a heat conducting medium. However, the above-described existing liquid cooling structure has the following significant drawbacks: the heat management efficiency contradicts with the temperature uniformity, and the traditional liquid cooling plate flow channel design (such as a serial long flow channel) easily causes large temperature difference between a cooling liquid inlet and a cooling liquid outlet, so that the cooling effect of different positions of the battery module is uneven, and local hot spots are easy to form. The complex parallel flow channels adopted for improving the temperature uniformity often generate fluid interference and pressure loss at the longitudinal and transverse junction, and the integral heat dissipation efficiency is affected. The structure is loose, the integration level is low, and the liquid cooling plate is usually used as an independent heat dissipation part to be installed outside the battery module or in a gap and separated from the bearing structure (shell) of the battery. Not only does this design add to the overall volume and weight of the system, but it also complicates the assembly process and challenges reliability. And the heat resistance superposition is that a battery shell, a heat conducting medium, a cold plate shell and other multi-layer interfaces are usually arranged between the battery and the liquid cooling plate, the heat conducting path is long, and the heat transfer efficiency is affected due to the superposition of interface heat resistance. Therefore, there is a need in the art for a battery liquid cooling enclosure that overcomes the above-mentioned structural drawbacks, and that has a highly integrated runner network, while ensuring efficient heat dissipation, and achieving excellent temperature uniformity inside the module. Disclosure of Invention The invention aims to provide a battery liquid cooling shell, a battery pack and a battery thermal management device, so as to solve the problems in the prior art, improve the uniformity of the internal temperature of the battery pack and the cooling effect, and meanwhile, due to the highly integrated design, the number of parts, the system volume and the weight are obviously reduced, and the assembly efficiency and the reliability are improved. In order to achieve the above object, the present invention provides the following solutions: The invention provides a battery liquid cooling shell which comprises a bottom plate, an upper cover and a box-shaped frame structure arranged between the bottom plate and the upper cover, wherein the box-shaped frame structure comprises a plurality of longitudinal partition plates and a plurality of transverse partition plates, the longitudinal partition plates and the transverse partition plates are mutually intersected and connected to divide a space between the bottom plate and the upper cover into a plurality of battery bins for accommodating battery monomers, the longitudinal partition plates, the transverse partition plates, the bottom plate and the upper cover are hollow structures, cooling flow passages isolated from each other are formed in the longitudinal partition plates, the cooling flow passages of each transverse partition plate, the cooling flow passages of the bottom plate and the cooling flow passages of the upper cover are independent flow passage units, and each flow passage unit is respectively provided with an independent cooling liquid inlet and an independent cooling liquid outlet. Preferably, the intersection area of the longitudinal partition plate and the transverse partition plate is provided with an