阅读说明：本技术 新能源汽车的电池温控装置及其控制方法 (Battery temperature control device of new energy automobile and control method thereof ) 是由 宋伟明 宋佳潞 于 2021-07-23 设计创作，主要内容包括：本发明公开了新能源汽车的电池温控装置及其控制方法,新能源汽车的电池温控装置包括：电池组；多组温控管道,其设置于多个电芯之间的间隙内,所述温控管道包括进液管道和出液管道,所述进液管道穿设在所述出液管道内,所述进液管道和出液管道分别连通所述温控液进口和温控液出口,所述进液管道包括内管和外管,所述内管和外管的曲面侧壁上均开设有多个长方形的出液孔,所述外管两端的曲面侧壁内沿周向设置有两条环形的凹槽,所述凹槽内设置有小齿轮,所述内管两端的曲面侧壁外沿轴向设置有两条环形的凸棱,所述凸棱上设置有齿条。本发明能够实现对新能源汽车的电池包的有效控温,保障新能源汽车在高温或低温环境下均能安全有效地运行。(The invention discloses a battery temperature control device of a new energy automobile and a control method thereof, wherein the battery temperature control device of the new energy automobile comprises: a battery pack; multiunit control by temperature change pipeline, it sets up in the clearance between a plurality of electricity cores, control by temperature change pipeline includes inlet channel and liquid outlet pipe, inlet channel wears to establish in the liquid outlet pipe, inlet channel and liquid outlet pipe communicate respectively temperature control liquid import and control by temperature change liquid export, inlet channel includes inner tube and outer tube, a plurality of rectangular play liquid holes have all been seted up on the curved surface lateral wall of inner tube and outer tube, be provided with two annular recesses along circumference in the curved surface lateral wall at outer tube both ends, be provided with the pinion in the recess, the curved surface lateral wall at inner tube both ends is provided with two annular beads along the axial outward, be provided with the rack on the bead. The temperature control system can realize effective temperature control of the battery pack of the new energy automobile, and ensure that the new energy automobile can safely and effectively run in a high-temperature or low-temperature environment.)

1. New energy automobile's battery temperature control device, its characterized in that includes:

the battery pack comprises a plurality of battery cells, a front-end temperature control plate and a rear-end temperature control plate are respectively arranged at two ends of the battery pack, the front-end temperature control plate is provided with a plurality of temperature control liquid inlets, and the rear-end temperature control plate is provided with a plurality of temperature control liquid outlets;

a plurality of temperature control pipelines arranged in the gaps among the plurality of electric cores, wherein the temperature control pipelines comprise a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlet pipeline is arranged in the liquid outlet pipeline in a penetrating way, the liquid inlet pipeline and the liquid outlet pipeline are respectively communicated with the temperature control liquid inlet and the temperature control liquid outlet, the liquid inlet pipeline comprises an inner pipe and an outer pipe, a plurality of rectangular liquid outlet holes are respectively arranged on the curved side walls of the inner pipe and the outer pipe, two annular grooves are circumferentially arranged in the curved side walls at the two ends of the outer pipe, a plurality of pinions connected with a motor are arranged in the grooves, two annular convex edges are axially arranged outside the curved side walls at the two ends of the inner pipe, racks are arranged on the convex edges, the inner pipe is coaxially sleeved in the outer pipe, and the racks on the convex edges at the two ends of the inner pipe are respectively meshed with the pinions in the grooves at the two ends of the outer pipe, the brush sealing strips are arranged outside the curved side wall of the inner pipe and comprise a plurality of linear sealing strips and two annular sealing strips, the linear sealing strips are axially arranged between the liquid outlet holes, and the two annular sealing strips are respectively arranged on two sides of the liquid outlet holes along the circumferential direction;

the temperature control pipeline is divided into a first temperature control pipeline, a second temperature control pipeline and a third temperature control pipeline, the first temperature control pipeline, the second temperature control pipeline and the third temperature control pipeline are respectively located inside, at the edge and at the corner of the battery pack, the cross section of the liquid outlet pipeline of the first temperature control pipeline is of a four-corner star-shaped structure, the cross section of the liquid outlet pipeline of the second temperature control pipeline is of a half four-corner star-shaped structure, and the cross section of the liquid outlet pipeline of the third temperature control pipeline is of a quarter four-corner star-shaped structure.

2. The battery temperature control device of the new energy automobile as claimed in claim 1, wherein the diameters of the liquid inlet pipelines in the first temperature control pipeline, the second temperature control pipeline and the third temperature control pipeline are different.

3. The battery temperature control device of the new energy automobile as claimed in claim 2, wherein the diameter of the liquid inlet pipeline in the first temperature control pipeline is larger than that of the liquid inlet pipeline in the second temperature control pipeline, and the diameter of the liquid inlet pipeline in the second temperature control pipeline is larger than that of the liquid inlet pipeline in the third temperature control pipeline.

4. The battery temperature control device of the new energy vehicle as claimed in claim 1, further comprising a controller, and a plurality of solenoid valves and a plurality of temperature sensors, wherein the solenoid valves are disposed at the temperature control liquid inlets, the temperature sensors are respectively located at the inner part, the edge part and the corner part of the battery pack, and the controller is electrically connected to the solenoid valves, the temperature sensors and the motor.

5. The battery temperature control device of the new energy automobile as claimed in claim 1, wherein the side walls of the liquid outlet pipes of the first temperature control pipe, the second temperature control pipe and the third temperature control pipe are all arc-shaped structures, and the radian of each arc-shaped structure is matched with the radian of the outer side wall of the battery core.

6. The battery temperature control apparatus of a new energy vehicle as claimed in claim 1, wherein there are three pinion gears in each groove, and two of the three pinion gears are equally spaced in the groove.

7. The battery temperature control device of the new energy automobile as claimed in claim 1, wherein the plurality of liquid outlet holes on the outer tube have the same size and are arranged at equal intervals in pairs.

8. The battery temperature control device of the new energy automobile as claimed in claim 7, wherein the plurality of liquid outlet holes on the inner tube are the same size as the plurality of liquid outlet holes on the outer tube, and a width between every two liquid outlet holes is the same as a width of the liquid outlet holes.

9. The control method of the battery temperature control device of the new energy automobile according to any one of claims 1 to 8, characterized by comprising the following steps:

the method comprises the following steps that firstly, a controller sets an overheat temperature value and a supercooling temperature value of a battery pack, and the controller monitors the temperature of each part of the battery pack through a temperature sensor;

when the controller monitors that the temperature of a certain part of the battery pack is higher than an overheating temperature value, the controller controls an electromagnetic valve at a temperature control liquid inlet of the part to be opened, temperature control liquid enters a liquid inlet pipeline of a temperature control pipeline, flows to a liquid outlet pipeline from a liquid outlet hole through the liquid inlet pipeline and flows out from a temperature control liquid outlet to take away heat of the battery pack, the controller controls to start a motor to enable an inner pipe to axially rotate relative to an outer pipe in the process, and adjusts the relative position of the inner pipe and the outer pipe according to the temperature difference between the current temperature and the overheating temperature value, so that the size of the liquid outlet hole is adjusted, the heat exchange rate is controlled, and the purpose of rapidly cooling the battery pack is achieved;

when the controller monitors that the temperature of a certain part of the battery pack is lower than the supercooling temperature value, the controller controls the electromagnetic valve at the temperature control liquid inlet of the part to be opened, the temperature control liquid enters the liquid inlet pipeline of the temperature control pipeline, flows from the liquid outlet hole to the liquid outlet pipeline through the liquid inlet pipeline and flows out from the temperature control liquid outlet to heat and preserve heat of the battery pack, the controller controls the motor to be started in the process so that the inner pipe rotates axially relative to the outer pipe, the relative position of the inner pipe and the outer pipe is adjusted according to the temperature difference between the current temperature and the supercooling temperature value, the size of the liquid outlet hole is adjusted, the heat exchange rate is controlled, and the purpose of rapidly heating the battery pack is achieved.

Technical Field

The invention relates to the technical field of new energy automobile power batteries. More specifically, the invention relates to a battery temperature control device of a new energy automobile and a control method thereof.

Background

The battery pack is used as an energy storage element on the new energy automobile and is one of key components of the new energy automobile, the performance of the new energy automobile is directly influenced, and the power battery is particularly sensitive to temperature change. If the battery pack of the new energy automobile cannot be timely radiated at high temperature, the temperature of the battery pack system is overhigh and uneven in temperature distribution, the charge-discharge cycle efficiency and the service life of the battery are finally reduced, and thermal runaway can be caused in serious cases to influence the safety and the reliability of the battery; at low temperature, the electrochemical reaction in the battery is influenced by the temperature, so that the problems of low charging and discharging efficiency, short service life of a battery pack and the like exist, and the development of new energy automobiles is also severely restricted. At present, a single cylindrical battery is generally adopted by a new energy automobile battery as an electric core of a battery pack, a plurality of electric cores form a battery pack, and a plurality of battery packs form the battery pack. The existing new energy automobile generally adopts an air cooling technology, and although the cost and the technical threshold are lower, the heat dissipation is uneven easily, the consistency of a battery is influenced, and the service life of the battery is shortened.

Disclosure of Invention

The invention aims to provide a battery temperature control device of a new energy automobile, which can ensure that the new energy automobile can safely and effectively operate in a high-temperature or low-temperature environment and prolong the service life of a battery.

To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a battery temperature control apparatus for a new energy automobile, including:

the battery pack comprises a plurality of battery cells, a front-end temperature control plate and a rear-end temperature control plate are respectively arranged at two ends of the battery pack, the front-end temperature control plate is provided with a plurality of temperature control liquid inlets, and the rear-end temperature control plate is provided with a plurality of temperature control liquid outlets;

a plurality of temperature control pipelines arranged in the gaps among the plurality of electric cores, wherein the temperature control pipelines comprise a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlet pipeline is arranged in the liquid outlet pipeline in a penetrating way, the liquid inlet pipeline and the liquid outlet pipeline are respectively communicated with the temperature control liquid inlet and the temperature control liquid outlet, the liquid inlet pipeline comprises an inner pipe and an outer pipe, a plurality of rectangular liquid outlet holes are respectively arranged on the curved side walls of the inner pipe and the outer pipe, two annular grooves are circumferentially arranged in the curved side walls at the two ends of the outer pipe, a plurality of pinions connected with a motor are arranged in the grooves, two annular convex edges are axially arranged outside the curved side walls at the two ends of the inner pipe, racks are arranged on the convex edges, the inner pipe is coaxially sleeved in the outer pipe, and the racks on the convex edges at the two ends of the inner pipe are respectively meshed with the pinions in the grooves at the two ends of the outer pipe, the brush sealing strips are arranged outside the curved side wall of the inner pipe and comprise a plurality of linear sealing strips and two annular sealing strips, the linear sealing strips are axially arranged between the liquid outlet holes, and the two annular sealing strips are respectively arranged on two sides of the liquid outlet holes along the circumferential direction;

the temperature control pipeline is divided into a first temperature control pipeline, a second temperature control pipeline and a third temperature control pipeline, the first temperature control pipeline, the second temperature control pipeline and the third temperature control pipeline are respectively located inside, at the edge and at the corner of the battery pack, the cross section of the liquid outlet pipeline of the first temperature control pipeline is of a four-corner star-shaped structure, the cross section of the liquid outlet pipeline of the second temperature control pipeline is of a half four-corner star-shaped structure, and the cross section of the liquid outlet pipeline of the third temperature control pipeline is of a quarter four-corner star-shaped structure.

Preferably, the diameters of the liquid inlet pipelines in the first temperature control pipeline, the second temperature control pipeline and the third temperature control pipeline are different.

Preferably, the diameter of the liquid inlet pipeline in the first temperature control pipeline is greater than that of the liquid inlet pipeline in the second temperature control pipeline, and the diameter of the liquid inlet pipeline in the second temperature control pipeline is greater than that of the liquid inlet pipeline in the third temperature control pipeline.

Preferably, still include controller and a plurality of solenoid valve, a plurality of temperature sensor, the solenoid valve sets up control by temperature change liquid import department, temperature sensor is located respectively inside, limit portion and bight of group battery, the controller electrical signal connection solenoid valve, temperature sensor and motor.

Preferably, the side walls of the liquid outlet pipelines of the first temperature control pipeline, the second temperature control pipeline and the third temperature control pipeline are all arc-shaped structures, and the radians of the arc-shaped structures are matched with the radians of the outer side walls of the battery cores.

Preferably, there are three pinions in each recess, with two of them equally spaced in the recess.

Preferably, the liquid outlet holes in the outer tube are consistent in size and are arranged at equal intervals in pairs.

Preferably, a plurality of liquid outlet holes on the inner tube are the same as a plurality of liquid outlet holes on the outer tube in size, and the width between every two liquid outlet holes is the same as the width of the liquid outlet holes.

The invention also provides a control method of the battery temperature control device of the new energy automobile, which comprises the following steps:

the method comprises the following steps that firstly, a controller sets an overheat temperature value and a supercooling temperature value of a battery pack, and the controller monitors the temperature of each part of the battery pack through a temperature sensor;

when the controller monitors that the temperature of a certain part of the battery pack is higher than an overheating temperature value, the controller controls an electromagnetic valve at a temperature control liquid inlet of the part to be opened, temperature control liquid enters a liquid inlet pipeline of a temperature control pipeline, flows to a liquid outlet pipeline from a liquid outlet hole through the liquid inlet pipeline and flows out from a temperature control liquid outlet to take away heat of the battery pack, the controller controls to start a motor to enable an inner pipe to axially rotate relative to an outer pipe in the process, and adjusts the relative position of the inner pipe and the outer pipe according to the temperature difference between the current temperature and the overheating temperature value, so that the size of the liquid outlet hole is adjusted, the heat exchange rate is controlled, and the purpose of rapidly cooling the battery pack is achieved;

when the controller monitors that the temperature of a certain part of the battery pack is lower than the supercooling temperature value, the controller controls the electromagnetic valve at the temperature control liquid inlet of the part to be opened, the temperature control liquid enters the liquid inlet pipeline of the temperature control pipeline, flows from the liquid outlet hole to the liquid outlet pipeline through the liquid inlet pipeline and flows out from the temperature control liquid outlet to heat and preserve heat of the battery pack, the controller controls the motor to be started in the process so that the inner pipe rotates axially relative to the outer pipe, the relative position of the inner pipe and the outer pipe is adjusted according to the temperature difference between the current temperature and the supercooling temperature value, the size of the liquid outlet hole is adjusted, the heat exchange rate is controlled, and the purpose of rapidly heating the battery pack is achieved.

The invention at least comprises the following beneficial effects: the temperature control pipeline is divided into a first temperature control pipeline, a second temperature control pipeline and a third temperature control pipeline, the three temperature control pipelines are respectively positioned in the inner part, the edge part and the corner part of the battery pack, different temperature controls are carried out according to the heat production conditions of different parts of the battery pack, and the temperature control system is energy-saving and environment-friendly; the temperature control pipeline is provided with a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlet pipeline comprises an inner pipe and an outer pipe which are coaxially sleeved, and the liquid inlet hole is adjusted through axial rotation of the inner pipe, so that the liquid outlet condition of the liquid inlet pipeline is adjusted, the heat exchange rate is adjusted, and the temperature control pipeline is energy-saving and efficient.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic structural diagram of one embodiment of the present invention;

fig. 2 is a schematic structural diagram of a temperature-controlled pipeline according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an outer tube according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of an inner tube according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a rack in a technical solution of the present invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1 to 5, the embodiment of the application provides a battery temperature control device of a new energy automobile, including:

the battery pack comprises a plurality of battery cells 100, wherein a front-end temperature control plate and a rear-end temperature control plate are respectively arranged at two ends of the battery pack, the front-end temperature control plate is provided with a plurality of temperature control liquid inlets, and the rear-end temperature control plate is provided with a plurality of temperature control liquid outlets;

multiunit temperature control pipeline, it sets up in the clearance between a plurality of electricity core 100, temperature control pipeline includes inlet channel 200 and goes out liquid pipeline 201, inlet channel 200 wears to establish in going out liquid pipeline 201, inlet channel 200 and play liquid pipeline 201 communicate respectively temperature control liquid import and temperature control liquid export, inlet channel 200 includes inner tube 210 and outer tube 211, a plurality of rectangular play liquid holes 212 have all been seted up on the curved surface lateral wall of inner tube 210 and outer tube 211, be provided with two annular recesses 213 along circumference in the curved surface lateral wall at outer tube 211 both ends, be provided with a plurality of pinions 214 that are connected with the motor in the recess 213, the curved surface lateral wall at inner tube 210 both ends is provided with two annular beads 215 along the axial outward, be provided with rack 216 on bead 215, the coaxial cover of inner tube 210 is established in the outer tube 211, make rack 216 on the bead 215 at inner tube 210 both ends respectively with the pinion 214 meshing in the recess 213 at outer tube 211 both ends, a brush sealing strip 217 is arranged outside the curved side wall of the inner tube 210, the brush sealing strip 217 comprises a plurality of linear sealing strips and two annular sealing strips, the linear sealing strips are axially arranged between the liquid outlet holes 212, and the two annular sealing strips are respectively arranged on two sides of the liquid outlet holes 212 along the circumferential direction;

the temperature control pipelines are divided into a first temperature control pipeline 202, a second temperature control pipeline 203 and a third temperature control pipeline 204, the first temperature control pipeline 202, the second temperature control pipeline 203 and the third temperature control pipeline 204 are respectively located inside, at the edge and at the corner of the battery pack, the cross section of the liquid outlet pipeline 201 of the first temperature control pipeline 202 is of a four-corner star structure, the cross section of the liquid outlet pipeline 201 of the second temperature control pipeline 203 is of a half four-corner star structure, and the cross section of the liquid outlet pipeline 201 of the third temperature control pipeline 204 is of a quarter four-corner star structure.

In the technical scheme, a plurality of battery packs are formed into a battery pack, each battery pack is provided with a plurality of temperature control pipelines, each battery pack is provided with a first temperature control pipeline 202, a second temperature control pipeline 203 and a third temperature control pipeline 204, the first temperature control pipeline 202, the second temperature control pipeline 203 and the third temperature control pipeline 204 are respectively arranged at the edge of each battery pack, the third temperature control pipelines are respectively arranged at the corner of each battery pack, each temperature control pipeline comprises a liquid inlet pipeline 200 and a liquid outlet pipeline 201, the liquid inlet pipeline 200 is arranged inside the liquid outlet pipeline 201, the two ends of each battery pack are respectively provided with a front temperature control plate and a rear temperature control plate, the front temperature control plate is provided with a temperature control liquid inlet, the rear temperature control plate is provided with a temperature control liquid outlet, the liquid inlet pipeline 200 is communicated with the temperature control liquid inlet, the liquid outlet pipeline 201 is communicated with the temperature control liquid outlet, the three temperature control pipelines are different in shape, the first temperature control pipeline 202 is in a four-corner star shape, the four sides of which are arc-shaped, the second temperature controlled conduit 203 is a one-half four-pointed star with two arc-shaped sides, and the third temperature controlled conduit 204 is a one-quarter four-pointed star with one arc-shaped side. Temperature control pipe is including the inner tube 210 and the outer tube 211 of coaxial setting, the outer wall both ends of inner tube 210 set up two rings of beads 215, the inner wall both ends of outer tube 211 set up two rings of recess 213, the top surface of bead 215 is provided with rack 216, the inside of recess 213 sets up a plurality of pinions 214, and two beads 215 block respectively and imbed in two recesses 213, pinion 214 and rack 216 mesh, and pinion 214 rotates and drives inner tube 210 along axial rotation, and a plurality of liquid outlet holes 212 are all seted up to the lateral wall of inner tube 210 and outer tube 211, and temperature control liquid circulates to liquid outlet pipe 201 by liquid outlet hole 212 through inner tube 210, makes temperature control liquid circulate to liquid outlet pipe 201 by near axis of inlet pipe 200, still is provided with on inner tube 210's the outer wall around sealing strip 217 in a plurality of liquid outlet hole 212 peripheries and centre. When the temperature control liquid is used, the temperature control liquid enters the liquid inlet pipeline 200 through the front end temperature control plate, the width of the liquid outlet hole 212 is changed by adjusting the rotation angle of the inner pipe 210 and the outer pipe 211, and the temperature control liquid flows to the liquid outlet pipeline 201 from the liquid outlet hole 212 and then flows to the rear end temperature control plate, so that the temperature control of the battery cell 100 is completed. The three temperature control pipelines are different in shape so as to be attached to the outer side wall of the battery core 100, so that the heat exchange contact area is increased, and the heat exchange efficiency is improved; the liquid inlet pipeline 200 is positioned in the liquid outlet pipeline 201, and the side wall of the liquid inlet pipeline 200 is provided with the long-strip-shaped liquid outlet hole 212, so that the temperature control liquid in the liquid inlet pipeline 200 flows to the liquid outlet pipeline 201 along the axial direction, the temperature at two ends of the temperature control pipeline is prevented from being different, and the uneven heat dissipation is avoided; the liquid inlet pipe 200 comprises an inner pipe 210 and an outer pipe 211 which are coaxially sleeved, the inner pipe 210 can be driven by a pinion 214 to rotate, so that the width of the liquid outlet hole 212 is adjusted, the liquid inlet quantity of the liquid inlet pipe 200 is adjusted, the heat exchange efficiency is adjusted, and the energy-saving and efficient temperature control effect is achieved.

In other technical solutions, as shown in fig. 1 to 2, the diameters of the liquid inlet pipes 200 in the first temperature control pipe 202, the second temperature control pipe 203, and the third temperature control pipe 204 are different. In the technical scheme, the diameters of the three liquid inlet pipelines 200 are different, so that the actual heat conditions of all parts of the battery pack are met, the space is saved, and the liquid inlet pipeline is energy-saving and environment-friendly.

In other technical solutions, as shown in fig. 1 to 2, the diameter of the liquid inlet pipe 200 in the first temperature control pipe 202 is larger than the diameter of the liquid inlet pipe 200 in the second temperature control pipe 203, and the diameter of the liquid inlet pipe 200 in the second temperature control pipe 203 is larger than the diameter of the liquid inlet pipe 200 in the third temperature control pipe 204. In the technical scheme, the diameters of the liquid inlet pipelines 200 in the first temperature control pipeline 202, the second temperature control pipeline 203 and the third temperature control pipeline 204 are set to be reduced in sequence according to the actual heat conditions of all parts of the battery pack, so that the purpose of energy conservation is achieved.

In other technical schemes, still include controller and a plurality of solenoid valve, a plurality of temperature sensor, the solenoid valve sets up control by temperature change liquid import department, temperature sensor is located respectively inside, limit portion and bight of group battery, the controller electrical signal connection solenoid valve, temperature sensor and motor. In this technical scheme, temperature sensor is used for monitoring the temperature variation at the different positions of group battery, the solenoid valve is used for controlling the circulation of each control by temperature change pipeline, the controller is used for receiving the temperature information of temperature sensor monitoring, and control solenoid valve and motor work, and then control the circulation path of control by temperature change liquid and the feed liquor flow of feed liquor pipeline 200.

In other technical solutions, as shown in fig. 1 to 2, the side walls of the liquid outlet pipes 201 of the first temperature control pipe 202, the second temperature control pipe 203, and the third temperature control pipe 204 are all arc-shaped structures, and the radians of the arc-shaped structures are matched with the radians of the outer side walls of the battery cells 100. In this technical scheme, the lateral wall laminating of three kinds of control by temperature change pipelines electric core 100's lateral wall has effectively ensured the heat exchange between control by temperature change pipeline and electric core 100.

In other embodiments, three pinions 214 are provided in each recess 213, and are arranged in the recesses 213 at equal intervals. In the technical scheme, the three pinions 214 are uniformly distributed in the groove 213, so that the smooth rotation of the inner tube 210 is ensured.

In other technical solutions, as shown in fig. 3, the liquid outlet holes 212 on the outer tube 211 have the same size, and are arranged at equal intervals two by two. In the technical scheme, the liquid outlet holes 212 are evenly arranged on the arc-shaped side wall of the outer tube 211, so that the uniformity of the discharged water is ensured.

In other embodiments, as shown in fig. 4, the plurality of exit holes 212 of the inner tube 210 and the plurality of exit holes 212 of the outer tube 211 have the same size, and the width between every two exit holes 212 is the same as the width of the exit holes 212. In the technical scheme, a plurality of liquid outlet holes 212 are evenly arranged on the arc-shaped side wall of the inner tube 210, the number and the size of the liquid outlet holes 212 on the inner tube 210 and the outer tube 211 are the same, the width between every two liquid outlet holes 212 is the same as the size of the liquid outlet holes 212, the inner tube 210 rotates axially relative to the outer tube 211, so that the liquid outlet holes 212 are changed from a fully closed state to a fully opened state, the water outlet amount of the liquid outlet pipeline 201 is controlled, and the heat exchange rate is further controlled.

The invention also provides a control method of the battery temperature control device of the new energy automobile, which comprises the following steps:

the method comprises the following steps that firstly, a controller sets an overheat temperature value and a supercooling temperature value of a battery pack, and the controller monitors the temperature of each part of the battery pack through a temperature sensor;

step two, when the controller monitors that the temperature of a certain part of the battery pack is higher than an overheating temperature value, the controller controls an electromagnetic valve at a temperature control liquid inlet of the part to be opened, the temperature control liquid enters a liquid inlet pipeline 200 of the temperature control pipeline, flows from a liquid outlet hole 212 to a liquid outlet pipeline 201 through the liquid inlet pipeline 200 and flows out from a temperature control liquid outlet to take away heat of the battery pack, in the process, the controller controls to start a motor to enable an inner pipe 210 to axially rotate relative to an outer pipe 211, and adjusts the relative position of the inner pipe 210 and the outer pipe 211 according to the temperature difference between the current temperature and the overheating temperature value, so that the size of the liquid outlet hole 212 is adjusted, the heat exchange rate is controlled, and the purpose of rapidly cooling the battery pack is achieved;

when the controller monitors that the temperature of a certain part of the battery pack is lower than the supercooling temperature value, the controller controls the electromagnetic valve at the temperature control liquid inlet of the part to be opened, the temperature control liquid enters the liquid inlet pipeline 200 of the temperature control pipeline, flows from the liquid outlet hole 212 to the liquid outlet pipeline 201 through the liquid inlet pipeline 200 and flows out from the temperature control liquid outlet to heat and preserve heat of the battery pack, the controller controls the motor to be started in the process so that the inner pipe 210 rotates axially relative to the outer pipe 211, and the relative position of the inner pipe 210 and the outer pipe 211 is adjusted according to the temperature difference between the current temperature and the supercooling temperature value, so that the size of the liquid outlet hole 212 is adjusted, the heat exchange rate is controlled, and the purpose of rapidly heating the battery pack is achieved.

In the technical scheme, an overheating temperature value and a supercooling temperature value are preset, a temperature sensor monitors the temperature of each part of the battery pack, when a controller monitors that the temperature of a certain part of the battery pack is higher than the overheating temperature value, an electromagnetic valve of a temperature control pipeline with a high temperature is opened, a motor rotates an inner pipe 210, the width of a liquid outlet hole 212 is adjusted according to the temperature rise rate, cooling liquid is introduced into the temperature control pipeline, and the battery pack is cooled and radiated; when the controller monitors that the temperature of a certain part of the battery pack is lower than the supercooling temperature value, the electromagnetic valve of the temperature control pipeline at the low temperature is opened, the motor rotating inner pipe 210 is started, the width of the liquid outlet hole 212 is adjusted according to the cooling rate, the heating liquid is introduced into the temperature control pipeline, and the battery pack is heated and insulated, so that the new energy automobile can safely and effectively run in a high-temperature or low-temperature environment.

The technical scheme can also comprise the following technical details so as to better realize the technical effects: the overlapping width d of the liquid outlet holes 212 is adjusted according to the temperature rising/reducing rate, and the inherent width of the liquid outlet holes 212 is marked as d₀Said ramp-up/ramp-down rate is marked V_TWherein d is adjusted according to the following formula:

in the technical scheme, the maximum value of the preset temperature rise/decrease rate is 6 ℃/min, when the temperature rise/decrease rate is more than or equal to 6 ℃/min, the liquid outlet holes 212 on the side walls of the inner tube 210 and the outer tube 211 are completely overlapped, so that the width of the liquid outlet holes 212 is maximized, the heat exchange rate of the liquid inlet pipeline 200 and the liquid outlet pipeline 201 is increased, and the temperature control rate is further increased; when the temperature rising/reducing rate is less than 6 ℃/min, the liquid outlet holes 212 on the side walls of the inner tube 210 and the outer tube 211 are partially overlapped, the width of the liquid outlet holes 212 is adjusted, and then the heat exchange rate of the liquid inlet pipeline 200 and the liquid outlet pipeline 201 is adjusted, so that the temperature control rate is controlled, and the energy-saving and efficient temperature control of the battery pack is realized.

The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the battery temperature control device of the new energy automobile of the present invention will be apparent to those skilled in the art.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.