CN216720049U

CN216720049U - Vehicle-mounted lithium battery cooling system of hybrid electric vehicle

Info

Publication number: CN216720049U
Application number: CN202122331069.0U
Authority: CN
Inventors: 郑斌
Original assignee: Haiyi New Energy Yangzhou Co ltd
Current assignee: Haiyi New Energy Yangzhou Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-06-10
Anticipated expiration: 2031-09-26

Abstract

The utility model relates to a vehicle-mounted lithium battery cooling system of a hybrid electric vehicle, and belongs to the technical field of power batteries. The water outlet of the vehicle-mounted radiator is connected with a circulating pump, an outlet pipeline of the circulating pump is connected with a cooling water inlet of the engine through a first switching valve, a cooling water outlet of the engine is connected with an inlet of the vehicle-mounted radiator through a radiator water return header pipe, each lithium battery box body is fixed on a water cooling plate respectively, a water inlet nozzle is installed below the side wall of one side of each water cooling plate, a water outlet nozzle is installed above the water cooling plate, and a built-in S-shaped pore channel is arranged in the water cooling plate; an outlet pipeline of the circulating pump is connected with a lithium battery water supply main pipe through a second switching valve, and the lithium battery water supply main pipe is connected with the water inlet nozzles of the water cooling plates through cooling water supply branch pipes; the water outlet nozzles of the water cooling plates are respectively connected with the lithium battery water outlet main pipe through the cooling water outlet branch pipes, and the outlet of the lithium battery water outlet main pipe is connected with the radiator water return main pipe. The cooling can be well carried out under two power states, and the cruising ability is improved.

Description

Vehicle-mounted lithium battery cooling system of hybrid electric vehicle

Technical Field

The utility model relates to a vehicle-mounted lithium battery cooling system of a hybrid electric vehicle, and belongs to the technical field of power batteries.

Background

Along with electric automobile's development, demand to large capacity lithium cell is bigger and bigger, and in order satisfying the continuation of the journey mileage, electric automobile need install a plurality of lithium cell boxes, installs a plurality of lithium cell groups in the lithium cell box body. For improving energy density, the more lithium batteries in each lithium battery box are, the better, each lithium battery can emit more heat during working, and a plurality of lithium batteries are arranged in one box body to cause heat accumulation, so that the performance of the lithium batteries is influenced, and the use safety is also seriously influenced.

The electric automobile comprises a pure electric automobile and a hybrid electric automobile, a common engine driving system is reserved for the hybrid electric automobile, and the electric automobile is also matched with a vehicle-mounted radiator, a circulating pump and a cooling system, wherein the vehicle-mounted radiator is provided with a main fan for radiating the vehicle-mounted radiator, a water outlet of the vehicle-mounted radiator is connected with an inlet of the circulating pump, an outlet pipeline of the circulating pump is connected with a cooling water inlet of the engine, a cooling water outlet of the engine is connected with a radiator water return main pipe, and the radiator water return main pipe is connected with a water inlet of the vehicle-mounted radiator.

In order to prevent the vehicle from wading or being splashed by rainwater to cause short circuit of the electrodes, and meanwhile, in order to prevent dust from entering, the lithium battery box body is usually of a closed structure, so that heat dissipation is more difficult. The temperature in the box body is too high, and spontaneous combustion of the lithium battery is easily caused, so that the key for improving the heat dissipation performance of the lithium battery box is achieved. Because the lithium battery pack is afraid of water, common heat dissipation measures are limited to expanding heat dissipation area, coating heat-conducting glue to improve heat conduction performance, adopting fan to perform forced ventilation and the like, and generally speaking, the heat dissipation performance still appears to be obviously insufficient, the improvement of energy density is influenced, the appearance size is increased, and the endurance mileage when the battery is used is influenced. The proportion of fuel power adopted by a plurality of hybrid electric vehicles is too high in use, so that the improvement of urban air environment is not facilitated, and the performance of the hybrid electric vehicles is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems in the prior art and provide a vehicle-mounted lithium battery cooling system of a hybrid electric vehicle, which utilizes the original cooling water heat dissipation system of the vehicle to well cool a lithium battery in a power state, greatly improves the heat dissipation performance of a lithium battery device, is beneficial to mounting more lithium battery packs in a smaller space and improves the energy density and the cruising ability of the lithium battery.

In order to solve the technical problem, the utility model provides a vehicle-mounted lithium battery cooling system of a hybrid electric vehicle, which comprises an engine, a vehicle-mounted radiator, a circulating pump and a vehicle-mounted lithium battery device, the vehicle-mounted radiator is provided with a main fan for radiating heat, a water outlet of the vehicle-mounted radiator is connected with an inlet of the circulating pump, an outlet pipeline of the circulating pump is connected with a cooling water inlet of the engine through a first switching valve, a cooling water outlet of the engine is connected with a return water manifold of the radiator, the radiator water return header pipe is connected with a water inlet of the vehicle-mounted radiator, a plurality of lithium battery packs which are connected in parallel are mounted in each lithium battery box body, the rear end faces of each lithium battery pack and the lithium battery box body are respectively fixed on the water cooling plates, a water inlet and a water inlet nozzle are mounted below the side wall of one side of each water cooling plate, and a water outlet nozzle are mounted above the side wall of the same side of each water cooling plate; the water inlet is connected with one end of a built-in S-shaped pore channel of the water cooling plate, and the other end of the built-in S-shaped pore channel is connected with the water outlet; an outlet pipeline of the circulating pump is connected with a lithium battery water supply main pipe through a switching valve II, and the lithium battery water supply main pipe is connected with the water inlet nozzles of the water cooling plates through cooling water supply branch pipes; the water outlet nozzles of the water cooling plates are respectively connected with a lithium battery water outlet main pipe through cooling water outlet branch pipes, and the outlet of the lithium battery water outlet main pipe is connected with the radiator water return main pipe.

Furthermore, a bypass pipeline is further arranged between the radiator return water main pipe and the outlet pipeline of the circulating pump, and a bypass control valve is mounted on the bypass pipeline.

Furthermore, an expansion pipe is connected to a high point of the radiator return water main pipe, the upper end of the expansion pipe is connected with a bottom expansion port of the expansion tank, and a bottom water outlet of the expansion tank is connected with a bottom water replenishing port of the vehicle-mounted radiator through a water replenishing pipeline.

Furthermore, the top of the expansion tank is connected with an exhaust valve, and an outlet of the exhaust valve is connected with an exhaust elbow.

Furthermore, the built-in S-shaped pore channel comprises a lower transverse pore channel which is connected with the water inlet and extends towards the left side, the tail end of the lower transverse pore channel is connected with a lower half S-shaped pore channel, the lower half S-shaped pore channel upwards and rightwards forms an S shape, extends to the right side and is connected with the lower end of the long vertical pore channel, the upper end of the long vertical pore channel extends to the upper part of the water cooling plate and is connected with an upper half S-shaped pore channel, the upper half S-shaped pore channel downwards and leftwards forms an S shape, extends to the left side and upwards is connected with the left end of an upper transverse pore channel, and the right end of the upper transverse pore channel horizontally extends rightwards and is connected with the water outlet.

Furthermore, the water cooling plate is formed by laminating two opposite sheets, the overflowing grooves on the two sheets are laminated to form a complete built-in S-shaped channel, sealing rings are respectively arranged on two sides of the extending path of the built-in S-shaped channel, and the sealing rings are also arranged between the two frames.

The utility model has the beneficial effects that: 1. the rear end surfaces of the lithium battery pack and the lithium battery box body are respectively fixed on a water cooling plate, the water cooling plate is used as a heat dissipation plate of the lithium battery pack and the lithium battery box body, and cooling water is introduced into a closed cooling water channel arranged in the water cooling plate, so that the temperature of the water cooling plate is greatly reduced, and the lithium battery pack and the lithium battery box body are cooled; meanwhile, the heat dissipation ribs on the two side walls of the lithium battery box body and the lithium battery heat dissipation fins arranged on the front wall greatly increase the heat dissipation area; the forced convection of the lithium battery fan further strengthens heat dissipation, prevents the temperature of the lithium battery in the box body from being too high by taking various measures, prolongs the service life of the battery, and simultaneously greatly improves the safety of the lithium battery.

2. Utilize the automobile from on-vehicle radiator, circulating pump, main fan and current piping of taking, bring the cooling of engine and the cooling of lithium cell into current cooling system jointly, realize the steady cooling that lasts to the water-cooling board, no matter adopt engine drive, perhaps lithium cell drive, all can obtain fine cooling, ensure steady operation and longer continuation of the journey mileage.

Drawings

FIG. 1 is a block diagram of the structure of a vehicle-mounted lithium battery cooling system of a hybrid electric vehicle according to the present invention;

fig. 2 is a perspective view of a lithium battery device according to the present invention.

FIG. 3 is a schematic structural view of a water-cooled plate according to the present invention.

In the figure: 1. the device comprises a lithium battery box body, 2, a total anode pile head, 3, a total cathode pile head, 4, an observation sight glass, 5, a water cooling plate, 5a, a water inlet nozzle, 5b, a water inlet, 5c, a lower transverse pore channel, 5d, a lower half S-shaped pore channel, 5e, a long vertical pore channel, 5f, an upper half S-shaped pore channel, 5g, an upper transverse pore channel, 5h, a water outlet, 5i, a water outlet nozzle, 5j, a water cooling plate mounting lug, 5k, a water cooling plate mounting hole, 6, a heat dissipation rib, 7, a lithium battery heat dissipation fin, 8, a lithium battery fan, 9, an engine, 10, a vehicle-mounted radiator, 11, a circulating pump, 12, a main fan, 13, a circulating pump outlet pipeline, 13a, a first switching valve, 13b, a second switching valve, 14, a lithium battery water supply main pipe, 15, a lithium battery water outlet main pipe, 16, a radiator main return water pipe, 17, a bypass control valve, 19, a bypass control valve, a bypass, Expansion pipe, 20, expansion tank, 21, moisturizing pipeline, 22, discharge valve.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

In the following description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not mean that the apparatus must have a specific orientation.

As shown in figure 1, the vehicle-mounted lithium battery cooling system of the hybrid electric vehicle comprises an engine 9, a vehicle-mounted radiator 10, a circulating pump 11 and a vehicle-mounted lithium battery device, wherein the vehicle-mounted radiator 10 is provided with a main fan 12 for radiating heat, the water outlet of the vehicle-mounted radiator 10 is connected with the inlet of the circulating pump 11, the outlet pipeline of the circulating pump 11 is connected with the cooling water inlet of the engine 9 through a switching valve 13a, the cooling water outlet of the engine 9 is connected with a radiator water return header pipe 16, the radiator water return header pipe 16 is connected with the water inlet of the vehicle-mounted radiator 10, the vehicle-mounted lithium battery device comprises a plurality of lithium battery box bodies, a plurality of lithium battery packs connected in parallel are arranged in each lithium battery box body, the rear end faces of each lithium battery pack and each lithium battery box body are respectively fixed on a water cooling plate, a water inlet and a water inlet nozzle are arranged below the side wall of each water cooling plate, a water outlet is arranged above the side wall of each water cooling plate on the same side and is provided with a water outlet nozzle; the water inlet is connected with one end of the built-in S-shaped pore channel of the water cooling plate, and the other end of the built-in S-shaped pore channel is connected with the water outlet; the circulating pump outlet pipeline 13 is connected with the lithium battery water supply main pipe 14 through a second switching valve 13b, and the lithium battery water supply main pipe 14 is connected with the water inlet nozzles of the water cooling plates through cooling water supply branch pipes; the water outlet nozzles of the water cooling plates are respectively connected with a lithium battery water outlet main pipe 15 through cooling water outlet branch pipes, and the outlet of the lithium battery water outlet main pipe 15 is connected with a radiator water return main pipe 16.

When the vehicle owner selects the operation of the engine 9, the first switching valve 13a is opened, the second switching valve 13b is closed, cooling water from the vehicle-mounted radiator 10 is pumped out by the circulating pump 11 and then cools the engine 9 through the circulating pump outlet pipeline 13 and the first switching valve 13a, the heated cooling water returns to the vehicle-mounted radiator 10 through the radiator return water manifold 16 to circulate, and the cooling water is continuously blown to the vehicle-mounted radiator 10 by the main fan 12 to be cooled.

When the car owner selects the lithium battery to operate, the second switching valve 13b is opened, the first switching valve 13a is closed, cooling water from the vehicle-mounted radiator 10 is pumped out by the circulating pump 11, enters the lithium battery water supply main pipe 14 through the circulating pump outlet pipeline 13 and the second switching valve 13b, enters the built-in S-shaped pore channel of each water cooling plate through each cooling water supply branch pipe and the corresponding water inlet nozzle, cools the corresponding lithium battery pack through the water cooling plate, enters the corresponding cooling water outlet branch pipe from the water outlet nozzle, converges to the lithium battery water outlet main pipe 15, and returns to the vehicle-mounted radiator 10 through the radiator water return main pipe 16 for circulating cooling.

A bypass pipeline 17 is further arranged between the radiator return water main pipe 16 and the outlet pipeline of the circulating pump 11, and a bypass control valve 18 is mounted on the bypass pipeline 17. According to the water temperature condition of the inlet and outlet of the vehicle-mounted radiator 10, the bypass control valve 18 can be properly opened in a certain proportion, so that a part of cooling water directly circulates through the bypass pipeline 17 to reduce the flow resistance.

An expansion pipe 19 is connected to a high point of the radiator return water main pipe 16, the upper end of the expansion pipe 19 is connected with a bottom expansion port of an expansion tank 20, and a bottom water outlet of the expansion tank 20 is connected with a bottom water replenishing port of the vehicle-mounted radiator 10 through a water replenishing pipe 21. The top of the expansion tank 20 is connected with an exhaust valve 22, and the outlet of the exhaust valve 22 is connected with an exhaust elbow.

In the initial stage of operation, non-condensable gas exists in the cooling water system, and along with the rising of the water temperature, the non-condensable gas gradually overflows, enters the expansion pipe 19 from the high point of the radiator return water main pipe 16, ascends to the expansion tank 20 along the expansion pipe 19, and is discharged by opening the exhaust valve 22. After the non-condensable gases are exhausted, the exhaust valve 22 is closed. The water stored in the expansion tank 20 can be directly fed into the circulation system of the vehicle-mounted radiator 10 through the water feeding pipeline 21, so that the stable operation of the circulation system is ensured.

As shown in fig. 2 and 3, install a plurality of lithium cell groups that connect in parallel each other in lithium cell box body 1, the total positive pole pile head 2 and the total negative pole pile head 3 of lithium cell group wear out from lithium cell box body 1's top respectively, and lithium cell box body 1's top is equipped with observes sight glass 4, is convenient for observe the state of 1 inside of lithium cell box body to and there is no smog to produce.

The rear end faces of the lithium battery packs and the lithium battery box body 1 are respectively fixed on the water cooling plate 5, the two side walls of the lithium battery box body 1 are respectively provided with a heat dissipation rib 6, the front wall of the lithium battery box body 1 is provided with a plurality of lithium battery heat dissipation fins 7, and the centers of the lithium battery heat dissipation fins 7 are respectively embedded with a lithium battery fan 8.

A water inlet 5b and a water inlet nozzle 5a are arranged below the right side wall of the water cooling plate 5, and a water outlet 5h and a water outlet nozzle 5i are arranged above the right side wall of the water cooling plate 5; the water inlet 5b is connected with one end of a built-in S-shaped pore channel of the water cooling plate 5, and the other end of the built-in S-shaped pore channel is connected with the water outlet 5 h.

The built-in S-shaped pore passages are symmetrically arranged by taking the transverse axis of the water cooling plate as a center. The built-in S-shaped pore passage comprises a lower transverse pore passage 5c which is connected with the water inlet 5b and extends towards the left side, the tail end of the lower transverse pore passage 5c is connected with a lower half S-shaped pore passage 5d, the lower half S-shaped pore passage 5d extends upwards and rightwards in an S shape to the right side and is connected with the lower end of a long vertical pore passage 5e, the upper end of the long vertical pore passage 5e extends to the upper part of the water cooling plate 5 and is connected with an upper half S-shaped pore passage 5f, the upper half S-shaped pore passage 5f extends downwards and leftwards in an S shape to the left side and is upwards connected with the left end of the upper transverse pore passage 5g, and the right end of the upper transverse pore passage 5g extends horizontally towards the right side and is connected with the water outlet 5 h.

The water inlet nozzle 5a is connected with a cooling water inlet pipe, the water outlet nozzle 5i is connected with a cooling water return pipe, low-temperature cooling water enters the lower transverse pore passage 5c from the water inlet nozzle 5a and the water inlet 5b, flows leftwards along the lower transverse pore passage 5c, turns upwards, enters the lower half S-shaped pore passage 5d, flows rightwards in a snake shape along the lower half S-shaped pore passage 5d to the lower end of the long vertical pore passage 5e, then flows to the upper half part of the water cooling plate 5 along the long vertical pore passage 5e, flows leftwards in a snake shape along the upper half S-shaped pore passage 5f, then enters the left end of the upper transverse pore passage 5g upwards, and finally flows out from the right end of the upper transverse pore passage 5g through the water outlet 5h and the water outlet nozzle 5 i.

The S-shaped channels greatly prolong the flowing distance of cooling water in the water-cooling plate 5, the upper half S-shaped channel 5f is responsible for cooling the upper part of the water-cooling plate, the lower half S-shaped channel 5d is responsible for cooling the lower part of the water-cooling plate, and the built-in S-shaped channels are uniformly distributed in the water-cooling plate 5, so that the temperature of the water-cooling plate 5 is uniform.

The water cooling plate 5 is formed by laminating two opposite sheets, and the overflowing grooves on the two sheets are laminated to form a complete built-in S-shaped channel, so that the manufacturing difficulty of the water cooling plate 5 can be reduced, and no slag inclusion and the like in the S-shaped channel are ensured. Sealing rings are respectively arranged on two sides of the extension path of the built-in S-shaped channel, so that cooling water is ensured to flow along the built-in S-shaped channel and not to leak; and a sealing ring is also arranged between the two frames to form double sealing.

The upper side and the lower side of the water cooling plate 5 are respectively provided with a water cooling plate mounting lug 5j, and the center of each water cooling plate mounting lug 5j is respectively provided with a water cooling plate mounting hole 5k, so that the water cooling plate 5 can be conveniently fixed on a wall of a vehicle.

The top wall of the lithium battery box body 1 is provided with a thermal resistance probe so as to monitor the temperature inside the lithium battery box body 1 in real time, and when the temperature is higher, the flow rate of cooling water can be increased; an alarm will be triggered when the temperature is too high.

In light of the foregoing description of the preferred embodiments of the present invention, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a vehicle-mounted lithium battery cooling system of hybrid vehicle, includes engine, vehicle-mounted radiator, circulating pump and vehicle-mounted lithium battery device, vehicle-mounted radiator is equipped with and carries out radiating main fan to it, vehicle-mounted radiator's delivery port links to each other with the entry of circulating pump, the outlet pipe of circulating pump passes through diverter valve one and links to each other with the coolant inlet of engine, the coolant outlet of engine links to each other with radiator return water house steward, radiator return water house steward with vehicle-mounted radiator's water inlet links to each other its characterized in that: a plurality of lithium battery packs which are connected in parallel are installed in each lithium battery box body, the rear end faces of each lithium battery pack and the lithium battery box body are respectively fixed on the water cooling plates, a water inlet is arranged below the side wall of one side of each water cooling plate and is provided with a water inlet nozzle, and a water outlet is arranged above the side wall of the same side of each water cooling plate and is provided with a water outlet nozzle; the water inlet is connected with one end of a built-in S-shaped pore channel of the water cooling plate, and the other end of the built-in S-shaped pore channel is connected with the water outlet; an outlet pipeline of the circulating pump is connected with a lithium battery water supply main pipe through a switching valve II, and the lithium battery water supply main pipe is connected with the water inlet nozzles of the water cooling plates through cooling water supply branch pipes; the water outlet nozzles of the water cooling plates are respectively connected with a lithium battery water outlet main pipe through cooling water outlet branch pipes, and the outlet of the lithium battery water outlet main pipe is connected with the radiator water return main pipe.

2. The cooling system for the vehicle-mounted lithium battery of the hybrid electric vehicle according to claim 1, characterized in that: and a bypass pipeline is also arranged between the radiator return water main pipe and the outlet pipeline of the circulating pump, and a bypass control valve is installed on the bypass pipeline.

3. The cooling system for the vehicle-mounted lithium battery of the hybrid electric vehicle according to claim 1, characterized in that: the high point of the radiator return water main pipe is connected with an expansion pipe, the upper end of the expansion pipe is connected with a bottom expansion port of an expansion tank, and a bottom water outlet of the expansion tank is connected with a bottom water replenishing port of the vehicle-mounted radiator through a water replenishing pipeline.

4. The cooling system for the vehicle-mounted lithium battery of the hybrid electric vehicle according to claim 3, characterized in that: the top of expansion tank is connected with discharge valve, discharge valve's exit linkage has the exhaust return bend.

5. The cooling system for the vehicle-mounted lithium battery of the hybrid electric vehicle according to claim 1, characterized in that: built-in S-shaped pore includes with the water inlet links to each other and the lower cross pore that extends to the left side, the end in cross pore links to each other with half S-shaped pore down, half S-shaped pore makes progress and is the S-shaped right side down and extends to the right side and link to each other with the lower extreme that the long hole was erected to the right side, the upper end that the long hole was erected extends to the upper portion of water-cooling plate, links to each other with first half S-shaped pore, first half S-shaped pore is the S-shaped left side down and is down and extends to the left side to upwards link to each other with the left end in last cross pore, the right-hand member level in last cross pore extend right side and with the delivery port links to each other.

6. The cooling system for the vehicle-mounted lithium battery of the hybrid vehicle according to any one of claims 1 to 5, characterized in that: the water cooling plate is formed by laminating two opposite plates, the overflowing grooves in the two plates are laminated to form a complete built-in S-shaped channel, sealing rings are arranged on two sides of an extending path of the built-in S-shaped channel respectively, and the sealing rings are arranged between two frames.