CN117302151A

CN117302151A - Vehicle and thermal management system thereof

Info

Publication number: CN117302151A
Application number: CN202311609784.3A
Authority: CN
Inventors: 谭龙; 庄明兴; 姚乐; 李柯城; 宋云霞; 付文英; 徐明川; 刘安; 王宇鑫; 贾玮; 任显国
Original assignee: Xuzhou Xcmg New Energy Vehicle Co ltd
Current assignee: Xuzhou Xcmg New Energy Vehicle Co ltd
Priority date: 2023-11-28
Filing date: 2023-11-28
Publication date: 2023-12-29
Anticipated expiration: 2043-11-28
Also published as: CN117302151B

Abstract

The present disclosure provides a vehicle and a thermal management system thereof. The thermal management system of a vehicle includes: the battery pack comprises an electric core, a first heat exchange part and a second heat exchange part, wherein the first heat exchange part is thermally coupled with the electric core and is internally provided with a first flow channel, so that the first heat exchange part can exchange heat with the electric core through a heat exchange medium flowing through the first flow channel, and the second heat exchange part is thermally coupled with the first heat exchange part and is internally provided with a second flow channel; and an air compressor fluidly connected to the second flow passage and configured to provide compressed air to an air brake system of the vehicle through the second flow passage such that the second heat exchange portion exchanges heat with the first heat exchange portion through the compressed air. The vehicle and the thermal management system thereof can reduce the adverse effect of heat dissipation of compressed air provided by the air compressor.

Description

Vehicle and thermal management system thereof

Technical Field

The disclosure relates to the technical field of new energy automobiles, in particular to a vehicle and a thermal management system thereof.

Background

The new energy automobile air brake type braking system relies on the air compressor to provide the air supply, and external environment air is compressed through the air compressor, and pressure suddenly becomes great, and then leads to gas temperature to rise, and the compressed air reaches the desicator after being cooled through the high temperature pipe and removes moisture, then reaches the gas receiver and stores for later use.

However, as a heat source, the compressed air in the high-temperature pipe has a heat dissipation problem, which affects the periphery of the layout position of the high-temperature pipe and the components at the upstream and downstream of the high-temperature pipe, thereby not only being beneficial to reducing the design and manufacturing cost of the vehicle, but also causing the service life of the related components to be reduced.

Disclosure of Invention

An object of the present disclosure is to provide a vehicle and a thermal management system thereof to reduce adverse effects of heat dissipation of compressed air provided by an air compressor.

A first aspect of the present disclosure provides a thermal management system for a vehicle, comprising:

the battery pack comprises a battery core, a first heat exchange part and a second heat exchange part, wherein the first heat exchange part is thermally coupled with the battery core, a first runner is arranged in the first heat exchange part, so that the first heat exchange part can exchange heat with the battery core through a heat exchange medium flowing through the first runner, and the second heat exchange part is thermally coupled with the first heat exchange part, and a second runner is arranged in the second heat exchange part; and

and the air compressor is in fluid connection with the second flow passage and is configured to provide compressed air for an air brake system of the vehicle through the second flow passage so that the second heat exchange part exchanges heat with the first heat exchange part through the compressed air.

In some embodiments, the thermal management system comprises:

An ambient temperature sensor configured to acquire a temperature T of an environment in which the vehicle is located;

a thermal management unit fluidly connected to the first heat exchange portion and configured to provide the heat exchange medium to the first heat exchange portion; and

and the control device is in signal connection with the environment temperature sensor, the air compressor and the thermal management unit, and is configured to determine the working mode of the thermal management system according to the temperature T, the thermal management unit can selectively heat or cool the heat exchange medium in different working modes, and the air compressor can be selectively started or closed so that the heat transfer directions among the electric core, the heat exchange medium and the compressed air are different.

In some embodiments of the present invention, in some embodiments,

the thermal management system includes a first fluid temperature sensor configured to obtain a temperature Twi of the heat exchange medium flowing into the first heat exchange portion;

the control device is configured to: if T is less than or equal to T0, the thermal management system is in a first working mode, in the first working mode, the thermal management unit is caused to heat the heat exchange medium to enable twi=tw1, the heat exchange medium heats the electric core and the compressed air, wherein Tw1 is a first preset temperature, tw1 is greater than Tb1, T0 is a freezing point of moisture in the compressed air, and Tb1 is a lowest temperature at which the electric core can normally work.

In some embodiments of the present invention, in some embodiments,

the thermal management system includes a cell temperature sensor configured to acquire a temperature Tb of the cell and a barometric pressure sensor configured to acquire a pressure p of the compressed air;

the control device is configured to: in the first working mode, if Tb is more than or equal to Tb1 and p is more than or equal to p1, the heat exchange medium is stopped being heated by the heat management unit, so that the heat management unit stops heating.

In some embodiments, the control device is configured to: if T0 is less than T and less than Tb1, the thermal management system is in a second working mode, in the second working mode, the air compressor is operated with power P, the compressed air heats the battery cell, wherein T0 is the freezing point of moisture in the compressed air, and Tb1 is the lowest temperature at which the battery cell can normally work.

In some embodiments of the present invention, in some embodiments,

the control device is configured to: if Tw is more than or equal to Tw2, gradually reducing the power P until Tw is basically kept at Tw3, wherein Tw2 is the second preset temperature, tw3 is the third preset temperature, and Tb1 is less than Tw2 and less than Tw3.

In some embodiments of the present invention, in some embodiments,

the thermal management system includes a cell temperature sensor configured to acquire a temperature Tb of the cell;

the control device is configured to: if Tb is more than or equal to Tb1, stopping the operation of the air compressor, so that the compressed air stops heating the battery cell.

In some embodiments, the control device is configured to: and in the second working mode, the heat exchange medium is heated by the thermal management unit, so that the heat exchange medium heats the battery cell.

In some embodiments of the present invention, in some embodiments,

the thermal management system includes a first fluid temperature sensor configured to obtain a temperature Twi of the heat exchange medium flowing into the first heat exchange portion and a second fluid temperature sensor configured to obtain a temperature Two of the heat exchange medium flowing out of the first heat exchange portion;

the control device is configured to: if T is greater than or equal to Tb1 and Two is greater than Tw4, the thermal management system is in a third working mode, in the third working mode, the thermal management unit is enabled to cool the heat exchange medium to enable twi=tw4, the heat exchange medium refrigerates the battery cell and the compressed air, wherein Tw4 is a fourth preset temperature, tw4 is less than Tb2, tb1 is the lowest temperature at which the battery cell can normally work, and Tb2 is the highest temperature at which the battery cell can normally work.

In some embodiments, a pressure relief valve is provided on the gas line between the air compressor and the second heat exchange portion, configured to relieve the compressed air in a state where the pressure p of the compressed air exceeds a safety limit p 0.

In some embodiments, the first heat exchanging portion and the second heat exchanging portion are plate-shaped structures, and the first heat exchanging portion and the second heat exchanging portion are stacked along a thickness direction of the first heat exchanging portion.

In some embodiments, the battery pack includes a heat exchange portion separator disposed between the first heat exchange portion and the second heat exchange portion in a thickness direction perpendicular to the first heat exchange portion, the heat exchange portion separator separating the first flow channel and the second flow channel.

In some embodiments of the present invention, in some embodiments,

the first heat exchange part is provided with a first fluid cavity, the battery pack comprises at least one first partition plate, and the at least one first partition plate is arranged in the first fluid cavity and divides the first fluid cavity into a plurality of subchambers to form the circuitous first flow channel; and/or

The second heat exchange part is provided with a second fluid cavity, the battery pack comprises at least one second partition plate, and the at least one second partition plate is arranged in the second fluid cavity and divides the second fluid cavity into a plurality of subchambers to form a roundabout second flow channel.

In some embodiments of the present invention, in some embodiments,

the first partition plate is provided with a first end and a second end which are oppositely arranged along the self extending direction, the first end of the first partition plate is connected with the cavity wall of the first fluid cavity, the second end of the first partition plate and the cavity wall of the first fluid cavity form a first interval, and different subchambers formed by the separation of the first partition plate are communicated through the first interval; and/or

The second partition plate is provided with a first end and a second end which are oppositely arranged along the self extending direction, the first end of the second partition plate is connected with the cavity wall of the second fluid cavity, the second end of the second partition plate and the cavity wall of the second fluid cavity form a second interval, and different subchambers formed by the separation of the second partition plate are communicated through the second interval.

In some embodiments of the present invention, in some embodiments,

the plurality of subchambers of the first fluid chamber are arranged side by side, the first heat exchange part is provided with a heat exchange medium inlet and a heat exchange medium outlet, the heat exchange medium inlet and the heat exchange medium outlet are respectively arranged on the chamber walls of the two subchambers at the two ends of the arrangement direction of the plurality of subchambers of the first fluid chamber, and the heat exchange medium inlet and the heat exchange medium outlet are respectively arranged at one end, far away from the first interval, of the corresponding subchamber; and/or

The second heat exchange part is provided with a compressed air inlet and a compressed air outlet, the compressed air inlet and the compressed air outlet are respectively arranged on the cavity walls of the two subchambers at the two ends of the arrangement direction of the subchambers of the second fluid cavity, and the compressed air inlet and the compressed air outlet are respectively arranged at one end, far away from the second interval, of the corresponding subchamber.

In some embodiments of the present invention, in some embodiments,

the battery pack comprises a first flow equalizing plate or a plurality of first flow equalizing plates arranged side by side in at least one subchamber of the first fluid chamber, and the extending direction of the first flow equalizing plates is parallel to the direction of the heat exchange medium flowing into the first heat exchange part; and/or

The battery pack comprises a second flow equalizing plate or a plurality of second flow equalizing plates arranged side by side in at least one subchamber of the second fluid chamber, and the extending direction of the second flow equalizing plates is parallel to the direction of the compressed air flowing into the second heat exchanging part.

In some embodiments of the present invention, in some embodiments,

the first separation plate is a flat plate or an S-shaped plate; and/or

The second partition plate is a flat plate or an S-shaped plate; and/or

The first flow equalizing plate is a flat plate or an S-shaped plate; and/or

The second flow equalizing plate is a flat plate or an S-shaped plate.

A second aspect of the present disclosure provides a vehicle comprising the thermal management system of the first aspect of the present disclosure.

The heat management system provided by the disclosure not only can combine the heat management of the high-temperature tube and the battery pack at the downstream of the air compressor, so that the high-temperature tube and the battery pack are both at proper working temperature, but also can reduce the adverse effect of heat dissipation of compressed air provided by the air compressor.

The vehicle provided by the present disclosure has advantages over the thermal management system provided by the present disclosure.

Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments of the disclosure, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and do not constitute an undue limitation on the disclosure.

FIG. 1 is a schematic structural diagram of a thermal management system of some embodiments of the present disclosure.

FIG. 2 is a schematic diagram of a partial structure of the thermal management system shown in FIG. 1.

Fig. 3 is a schematic cross-sectional structural view of a battery pack of the thermal management system shown in fig. 1.

Fig. 4 is a control schematic diagram of a thermal management system of some embodiments of the present disclosure.

In fig. 1 to 4, each reference numeral represents:

1. a battery pack; 11. a battery cell; 12. a first heat exchange part; 120. a first fluid chamber; 121. a heat exchange medium inlet; 122. a heat exchange medium outlet; 13. a second heat exchange part; 130. a second fluid chamber; 131. a compressed air inlet; 132. a compressed air outlet; 14. a heat exchange part baffle; 15. a first partition plate; 16. a second partition plate; 17. a first flow equalizing plate; 18. a second flow equalizing plate;

21. a thermal management unit; 22. a first heat exchange medium tube; 23. a second heat exchange medium tube;

31. an air compressor; 32. an air dryer; 33. a first compressed air pipe; 34. a second compressed air pipe;

41. an ambient temperature sensor; 42. a cell temperature sensor; 43. an air pressure sensor; 44. a first fluid temperature sensor; 45. a second fluid temperature sensor;

5. and a control device.

Detailed Description

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present disclosure, it should be understood that the use of terms such as "first," "second," etc. for defining components is merely for convenience in distinguishing corresponding components, and the terms are not meant to be construed as limiting the scope of the present disclosure unless otherwise indicated.

In the description of the present disclosure, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and to simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be configured and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present disclosure; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

In the process of realizing the present disclosure, the inventor finds that, for a new energy automobile, there is a larger overlapping range between a high temperature pipe at the downstream of an air compressor and a suitable working temperature interval of a battery pack, and heat of compressed air in the high temperature pipe can be used for heat management of the battery pack of the automobile, so as to reduce adverse effects of heat dissipation of the compressed air.

In view of this, referring to fig. 1 to 4, some embodiments of the present disclosure provide a thermal management system of a vehicle, including a battery pack 1 and an air compressor 31.

The battery pack 1 comprises a battery core 11, a first heat exchange part 12 and a second heat exchange part 13, wherein the first heat exchange part 12 is thermally coupled with the battery core 11 and is internally provided with a first flow channel, so that the first heat exchange part 12 can exchange heat with the battery core 11 through a heat exchange medium flowing through the first flow channel, and the second heat exchange part 13 is thermally coupled with the first heat exchange part 12 and is internally provided with a second flow channel.

The air compressor 31 is in fluid connection with the second flow passage and is configured to supply compressed air to an air brake system of the vehicle through the second flow passage so that the second heat exchanging portion 13 exchanges heat with the first heat exchanging portion 12 through the compressed air.

The heat exchange modes of the first heat exchange part 12 and the second heat exchange part 13 can be convection heat exchange, conduction heat exchange and radiation heat exchange. The heat exchange medium in the first flow passage and the compressed air in the second flow passage can adopt forward flow heat exchange or reverse flow heat exchange.

Optionally, a plurality of electrical cores 11 are disposed on the first heat exchanging portion 12 in an array form. Optionally, the heat exchange medium is water, and the cooling mode of the battery cell 11 and the compressed air is liquid cooling, so that the cooling effect can be improved.

Optionally, referring to fig. 1, the thermal management system includes a first heat exchange medium pipe 22 and a second heat exchange medium pipe 23, and the thermal management unit 21, the first heat exchange medium pipe 22, the first flow passage, and the second heat exchange medium pipe 23 are sequentially connected and form a circulation loop of the heat exchange medium. Alternatively, referring to fig. 1 and 2, the thermal management system includes an air dryer 32, a first compressed air pipe 33, and a second compressed air pipe 34, the air compressor 31, the second flow passage, and the air dryer 32 are sequentially disposed in a flow direction of compressed air, the air compressor 31 and the second flow passage are connected through the first compressed air pipe 33, the second flow passage and the air dryer 32 are connected through the second compressed air pipe 34, and the air dryer 32 is configured to remove moisture in the compressed air. The first compressed air pipe 33, the second flow passage, and the second compressed air pipe 34 constitute a compressed air line.

In the thermal management system of the vehicle provided by the embodiment of the disclosure, the temperature of the compressed air provided by the air compressor 31 is higher, the compressed air can be used as a heat source, and the heat exchange is performed between the compressed air and the heat exchange medium in the first heat exchange part 12 through the second heat exchange part 13, so as to heat the electric core 11; the heat exchange medium can directly exchange heat with the compressed air and the battery cell 11 in the second heat exchange part 13 through the first heat exchange part 12, so as to heat or cool the compressed air and the battery cell 11, and the battery cell 11 of the battery pack 1 is at a proper working temperature under different environments.

The second flow passage arranged in the second heat exchange part 13 can replace at least a part of the high-temperature pipe, the second flow passage is arranged in the battery pack 1, compressed air flowing through the second flow passage can exchange heat with the heat exchange medium in the first flow passage, and is not arranged at the position on the inner side of the vehicle frame and the like, which is usually used for arranging the high-temperature pipe, the heat dissipation capacity of the high-temperature pipe is higher, so that the heat harmful influence of the heat dissipation of the compressed air on the corresponding position on the vehicle can be reduced; the heat exchange mode ensures that the vehicle does not need to reserve enough avoiding distances for parts such as high and low voltage wire harnesses, nylon pipes, rubber pipes and the like, and also does not need to wrap a heat insulation sheath outside the high temperature pipe, thereby being beneficial to reducing the design and manufacturing cost of the vehicle; the service life of components such as the air dryer 32, nylon tubing, etc. around the high temperature tubing placement location or upstream and downstream of the high temperature tubing is also extended based on the greater heat dissipation capability.

It can be seen that the thermal management system provided by the embodiment of the disclosure not only can combine the heat management of the high-temperature tube and the battery pack 1 downstream of the air compressor 31, so that the high-temperature tube and the battery pack 1 are both at a suitable working temperature, but also can reduce the adverse effect of heat dissipation of the compressed air provided by the air compressor.

In some embodiments, the thermal management system includes an ambient temperature sensor 41, a thermal management unit 21, and a control device 5. The ambient temperature sensor 41 is configured to acquire a temperature T of an environment in which the vehicle is located. The thermal management assembly 21 is in fluid connection with the first heat exchange portion 12 and is configured to provide a heat exchange medium to the first heat exchange portion 12. The control device 5 is in signal connection with the ambient temperature sensor 41, the air compressor 31 and the thermal management unit 21 and is configured to determine the operation mode of the thermal management system according to the temperature T, and in different operation modes, the thermal management unit 21 selectively heats or cools the heat exchange medium, and the air compressor 31 is selectively turned on or off so that the heat transfer direction between the battery cell 11, the heat exchange medium and the compressed air is different.

Alternatively, the thermal management unit 21 includes a heating device configured to heat the heat exchange medium, a heat dissipation device configured to cool the heat exchange medium, and a pumping device configured to pump the heat exchange medium to the first heat exchange portion 12.

In the above embodiment, according to the difference of the ambient temperature T, the thermal management unit 21 may heat or cool the heat exchange medium and provide the heated or cooled heat exchange medium to the first heat exchange portion 12, so that the heat exchange medium heats or cools the battery cell 11 and the compressed air, or may directly provide the heat exchange medium that is not heated or cooled to the first heat exchange portion 12; the air compressor 31 may be started to supply compressed air to the second heat exchange portion 13 to heat the heat exchange medium cell 11, or may be stopped to supply compressed air at a higher temperature to the second heat exchange portion 13. The operation state of the thermal management unit 21 and the operation state of the air compressor 31 may be arbitrarily combined to form different operation modes.

The mode of operation of the thermal management system of some embodiments of the present disclosure is further described below in conjunction with fig. 1-4.

In the related art, the downstream end of the high-temperature pipe is easy to enrich moisture, if the ambient temperature is below a freezing point, after the air compressor stops working, the compressed air pipeline is blocked due to the fact that the moisture is frozen, and then the air brake type braking system cannot normally supplement compressed air, and the braking system fails.

In some embodiments, the thermal management system includes a first fluid temperature sensor 44, the first fluid temperature sensor 44 configured to obtain a temperature Twi of the heat exchange medium flowing into the first heat exchange portion 12. The control device 5 is configured to: if T is less than or equal to T0, the thermal management system is in a first operation mode, in the first operation mode, the thermal management unit 21 is caused to heat the heat exchange medium so as to enable twi=tw1, the heat exchange medium heats the battery cell 11 and the compressed air, wherein Tw1 is a first preset temperature, tw1 is greater than Tb1, T0 is the freezing point of the moisture in the compressed air, and Tb1 is the lowest temperature at which the battery cell 11 can normally operate.

Based on the first working mode of the thermal management system, in the state that T is less than or equal to T0, when the vehicle is started, the temperature Tb of the battery core 11 and the temperature Ta of the compressed air are both the temperature T of the environment where the vehicle is located, the compressed air pipeline is frozen, the temperature Tb of the battery core 11 is lower than a proper working temperature range, at the moment, the heat management unit 21 supplies a heat exchange medium with the temperature Tw1 to the first heat exchange part 12, and because Tw1 is more than Tb1, the heat exchange medium can heat the battery core 11 through the first heat exchange part 12 and heat the compressed air through the first heat exchange part 12 and the second heat exchange part 13. Therefore, the first working mode not only can enable the battery cell 11 to reach a proper working temperature in a cold environment, but also can reduce the risk of icing and blocking of the compressed air pipeline and improve the reliability of the braking system.

In some embodiments, the thermal management system includes a cell temperature sensor 42 and a pressure sensor 43, the cell temperature sensor 42 being configured to obtain the temperature Tb of the cell 11, the pressure sensor 43 being configured to obtain the pressure p of the compressed air. The control device 5 is configured to: in the first operation mode, if Tb is greater than or equal to Tb1 and p is greater than or equal to p1, the heat-exchanging medium is stopped from being heated by the heat-managing unit 21, so that the heat-managing unit 21 stops heating.

In the above embodiment, the thermal management system can determine the icing condition in the compressed air pipeline according to the pressure p of the compressed air, if Tb is greater than or equal to Tb1 and p is greater than or equal to p1, it indicates that after heating, the temperature Tb of the battery cell 11 is within a suitable operating temperature range, and the ice layer in the compressed air pipeline has been completely melted, and considering that the battery cell 11 emits heat during operation, the thermal management unit 21 stops heating at this time, which is beneficial to reducing energy consumption and cost.

In some embodiments, the control device 5 is configured to: if T0 is less than T and less than Tb1, the thermal management system is in the second operation mode, and in the second operation mode, the air compressor 31 is operated with power P, and the compressed air heats the battery cell 11, wherein T0 is the freezing point of the moisture in the compressed air, and Tb1 is the lowest temperature at which the battery cell 11 can normally operate.

Based on the second operation mode of the thermal management system, in the state that T0 is less than T and less than Tb1, when the vehicle is started, the temperature Tb of the battery core 11 and the temperature Ta of the compressed air are both the temperature T of the environment where the vehicle is located, ice is not formed in the compressed air pipeline, the temperature Tb of the battery core 11 is lower than a proper operation temperature range, at this time, compressed air is provided to the second heat exchange part 13 through the air compressor 31, and the temperature Tai of the compressed air flowing into the second heat exchange part 13 can reach 120 ℃, and the compressed air can heat the battery core 11 through the second heat exchange part 13 and the first heat exchange part 12 due to higher temperature of the compressed air. Therefore, the second operation mode can make the battery core 11 reach a proper operation temperature in a colder environment, and the heat of the heating battery core 11 is derived from the compressed air, and in this operation mode, the compressed air can partially or completely replace the heating function of the thermal management unit 21, so that the energy consumption and the cost are reduced.

In some embodiments, the thermal management system includes a first fluid temperature sensor 44, the first fluid temperature sensor 44 configured to obtain a temperature Twi of the heat exchange medium flowing into the first heat exchange portion 12. The control device 5 is configured to: if Tw is more than or equal to Tw2, gradually reducing the power P until Tw is basically kept at Tw3, wherein Tw2 is the second preset temperature, tw3 is the third preset temperature, and Tb1 is less than Tw2 and less than Tw3.

During operation of the vehicle, the battery cell 11 needs to be substantially maintained in a thermally balanced state to stabilize the temperature Tb of the battery cell 11 in a suitable range. In the above embodiment, since the larger the power P of the air compressor 31 is, the larger the flow rate of the compressed air is, the larger the power P of the air compressor 31 can be set to be so that the battery 11 is quickly warmed up, tw3 can be used as the target value of Tw for keeping the thermal balance of the battery 11, if Tw is equal to or greater than Tw2, it indicates that Tw is close to the target value, at this time, the power P is gradually reduced, and the power P is kept constant, so that the thermal balance of the battery 11 can be basically kept.

In some embodiments, the thermal management system includes a cell temperature sensor 42, the cell temperature sensor 42 being configured to acquire a temperature Tb of the cell 11. The control device 5 is configured to: if Tb is greater than or equal to Tb1, the air compressor 31 is stopped to stop the compressed air from heating the battery cell 11.

In the above embodiment, if Tb is greater than or equal to Tb1, it indicates that after heating, the temperature Tb of the battery cell 11 is within a suitable operating temperature range, and considering that the battery cell 11 will emit heat during operation, the heat management unit 21 stops heating at this time, which is beneficial to reducing energy consumption and cost.

In some embodiments, the control device 5 is configured to: in the second mode of operation, the thermal management unit 21 is caused to heat the heat exchange medium such that the heat exchange medium heats the cells 11.

In the above embodiment, in the second operation mode, the compressed air provided by the air compressor 31 is used as the main heat source, the thermal management unit 21 can start the heating function, the heat exchange medium is used as the auxiliary heat source, and the thermal management system can heat the battery cell 11 together through the compressed air and the heated heat exchange medium, so as to facilitate the improvement of the heating rate, and make the battery cell 11 quickly reach the appropriate operating temperature range, thereby enabling the vehicle to quickly put into normal operation.

In some embodiments, the thermal management system includes a first fluid temperature sensor 44 and a second fluid temperature sensor 45, the first fluid temperature sensor 44 configured to obtain a temperature Twi of the heat exchange medium flowing into the first heat exchange portion 12, and the second fluid temperature sensor 45 configured to obtain a temperature Two of the heat exchange medium flowing out of the first heat exchange portion 12. The control device 5 is configured to: if T is greater than or equal to Tb1 and Two is greater than Tw4, the thermal management system is in a third operation mode, in the third operation mode, the thermal management unit 21 is caused to cool the heat exchange medium so as to enable tw=tw4, and the heat exchange medium is used for refrigerating the battery cell 11 and the compressed air, where Tw4 is a fourth preset temperature, tw4 is less than Tb2, tb1 is the lowest temperature at which the battery cell 11 can normally operate, and Tb2 is the highest temperature at which the battery cell 11 can normally operate.

Based on the third operation mode of the thermal management system, tw4 may be a target value of Tw for maintaining the thermal balance of the battery cell 11, where Tb is greater than or equal to Tb1, and when the vehicle is started, the temperature Tb of the battery cell 11 and the temperature Ta of the compressed air are both the temperature T of the environment where the vehicle is located, and if Tw > Tw4, along with the heat dissipation of the compressed air provided by the battery cell 11 and the air compressor 31 during the operation of the vehicle, it indicates that the heat absorption of the heat exchange medium from the battery cell 11 and the compressed air is greater, the heat dissipation requirements of at least one of the battery cell 11 and the compressed air are stronger, and the temperature Tb of the battery cell 11 and the temperature Tao of the compressed air flowing out of the second heat exchange portion 13 may be higher than appropriate ranges. At this time, the heat exchange medium having a temperature Tw1 is supplied to the first heat exchange unit 12 by the heat management unit 21, and the heat exchange medium can be cooled to the battery cell 11 by the first heat exchange unit 12 and cooled to the compressed air by the first heat exchange unit 12 and the second heat exchange unit 13 because Tw4 < Tb 2. Therefore, the third working mode can fully dissipate heat of the battery cell 11 and the compressed air under the environment with higher temperature so as to reach the proper working temperature.

In each of the above-mentioned operation modes, T0 may be 0 ℃, and Tb1 may be 25 ℃ and Tb2 may be 40 ℃ considering that the suitable operation temperature range of the battery cell 11 of the battery pack 1 is 25 ℃ to 40 ℃, i.e., the temperature is lower than 25 ℃ and the temperature is higher than 40 ℃. Accordingly, tw1 may be 50 ℃, tw2 may be 45 ℃, tw1 may be 50 ℃, and Tw4 may be 45 ℃.

In some embodiments, the thermal management system comprises a pressure relief valve arranged on the gas line between the air compressor 31 and the second heat exchange portion 13, configured to relieve the compressed air in a state in which the pressure p of the compressed air exceeds the safety limit p 0.

In the above embodiment, by providing the pressure release valve on the gas pipeline between the air compressor 31 and the second heat exchange portion 13, the pressure p of the compressed air can be prevented from exceeding the safety limit value in the state where the compressed air is used as the heat source, and the safety risk in the operation process of the thermal management system can be reduced.

The structure of the first heat exchanging portion 12 and the second heat exchanging portion 13 of some embodiments of the present disclosure will be further described with reference to fig. 2 to 3.

Fig. 2 illustrates a structure of the second heat exchanging part 13 in some embodiments of the present disclosure. The structure and dimensions of the first heat exchanging portion 12 and the second heat exchanging portion 13 may be substantially the same or similar, and reference is made specifically to the following description regarding fig. 2 and the second heat exchanging portion 13. Fig. 3 illustrates a cross-sectional configuration of the first heat exchanging portion 12 and the second heat exchanging portion 13 in some embodiments of the present disclosure.

In some embodiments, the first heat exchanging portion 12 and the second heat exchanging portion 13 are plate-shaped structures, and the first heat exchanging portion 12 and the second heat exchanging portion 13 are stacked in the thickness direction of the first heat exchanging portion 12.

In the above embodiment, the first heat exchange portion 12 and the second heat exchange portion 13 exchange heat mainly through the end surfaces perpendicular to the thickness direction thereof, and the heat transfer area is large and the heat exchange effect is good.

In some embodiments, the battery pack 1 includes a heat exchange portion separator 14 disposed between the first heat exchange portion 12 and the second heat exchange portion 13 in a direction perpendicular to the thickness direction of the first heat exchange portion 12, the heat exchange portion separator 14 separating the first flow passage and the second flow passage.

Alternatively, a first fluid chamber 120 for forming a first flow channel is formed on one end surface of the first heat exchange portion 12 perpendicular to the thickness direction, a second fluid chamber 130 for forming a second flow channel is formed on one end surface of the second heat exchange portion 13 perpendicular to the thickness direction, the end surface of the first heat exchange portion 12 on which the first fluid chamber 120 is formed and the end surface of the second heat exchange portion 13 on which the second fluid chamber 130 is formed are disposed toward each other, and the heat exchange portion partition 14 is disposed between the first fluid chamber 120 and the second fluid chamber 130 and partitions the space between the first fluid chamber 120 and the second fluid chamber 130. The first heat exchange part 12 and the second heat exchange part 13 of this form have the characteristic of facilitating the processing of the flow channels. Alternatively, the heat exchange part partition 14 may be made of a material with a relatively high thermal conductivity, so as to improve the heat exchange effect between the heat exchange medium and the compressed air.

In some embodiments, the first heat exchanging part 12 is provided with a first fluid chamber 120, and the battery pack 1 includes at least one first partition plate 15, and the at least one first partition plate 15 is disposed in the first fluid chamber 120 and divides the first fluid chamber 120 into a plurality of sub-chambers to form a circuitous first flow path.

In some embodiments, the second heat exchanging part 13 is provided with a second fluid chamber 130, and the battery pack 1 includes at least one second partition plate 16, and the at least one second partition plate 16 is disposed in the second fluid chamber 130 and divides the second fluid chamber 130 into a plurality of sub-chambers to form a circuitous second flow path.

Alternatively, the battery pack 1 includes one first partition plate 15, and the first fluid chamber 120 is partitioned into two subchambers. Optionally, the battery pack 1 comprises a second separator 16, the second fluid chamber 130 being divided into two subchambers.

In the above embodiment, by providing the first partition plate 15 and/or the second partition plate 16 and forming a roundabout flow channel in the corresponding heat exchange portion, in the flow channel, fluid can directly exchange heat with the corresponding heat exchange portion, or can indirectly exchange heat with the corresponding heat exchange portion through the corresponding partition plate, and the heat exchange area of the fluid is increased by increasing the contact area, so that the heat exchange effect of the heat exchange medium and the compressed air is improved.

In some embodiments, the first partition plate 15 has a first end and a second end disposed opposite to each other along the self-extending direction, the first end of the first partition plate 15 is connected to the cavity wall of the first fluid cavity 120, the second end of the first partition plate 15 forms a first space with the cavity wall of the first fluid cavity 120, and different sub-cavities separated by the first partition plate 15 communicate through the first space.

In some embodiments, the second divider 16 has a first end and a second end disposed opposite to each other along its own direction of extension, the first end of the second divider 16 being connected to the wall of the second fluid chamber 130, the second end of the second divider 16 forming a second space with the wall of the second fluid chamber 130, the different subchambers separated by the second divider 16 communicating through the second space.

Alternatively, a plurality of first partition plates 15 are disposed in the first fluid chamber 120 side by side in a staggered manner, i.e., the first end of one of the first partition plates 15 and the first end of the adjacent first partition plate 15 are respectively connected to the chamber walls of the opposite sides of the first fluid chamber 120. Alternatively, a plurality of second separator plates 16 are disposed side by side in the second fluid chamber 130 in a staggered manner, i.e., the first end of one of the second separator plates 16 and the first end of the adjacent second separator plate 16 are respectively connected to the chamber walls of the second fluid chamber 130 on opposite sides thereof.

In the above embodiment, the fluid flows from one sub-cavity to the other sub-cavity in the corresponding heat exchange portion, and the separation between the partition plate and the cavity wall of the fluid cavity, so that the flow path of the fluid in the corresponding heat exchange portion is prolonged, which is beneficial to increasing the heat exchange area of the fluid and improving the heat exchange efficiency.

In some embodiments, the plurality of subchambers of the first fluid chamber 120 are arranged side by side, the first heat exchange portion 12 is provided with a heat exchange medium inlet 121 and a heat exchange medium outlet 122, the heat exchange medium inlet 121 and the heat exchange medium outlet 122 are respectively arranged on the chamber walls of the two subchambers at two ends of the arrangement direction of the plurality of subchambers of the first fluid chamber 120, and the heat exchange medium inlet 121 and the heat exchange medium outlet 122 are respectively arranged at one end, far away from the first interval, of the corresponding subchamber.

In some embodiments, the plurality of subchambers of the second fluid chamber 130 are arranged side by side, the second heat exchange portion 13 is provided with a compressed air inlet 131 and a compressed air outlet 132, the compressed air inlet 131 and the compressed air outlet 132 are respectively arranged on the chamber walls of the two subchambers at two ends of the arrangement direction of the plurality of subchambers of the second fluid chamber 130, and the compressed air inlet 131 and the compressed air outlet 132 are respectively arranged at one end, far away from the second interval, of the corresponding subchamber.

Optionally, in order to optimize the arrangement of the heat exchange medium pipeline and the compressed air pipeline on the vehicle body, the first heat exchange portion 12 and the second heat exchange portion 13 are in a plate-shaped structure, the heat exchange medium inlet 121 and the heat exchange medium outlet 122 are disposed on the same side of the first heat exchange portion 12, and the compressed air inlet 131 and the compressed air outlet 132 are disposed on the same side of the second heat exchange portion 13.

In the above embodiment, the fluid can fully flow through each subchamber of the corresponding heat exchange portion, which is conducive to improving the heat exchange efficiency by increasing the contact area, and is conducive to improving the uniformity of heat exchange between the fluid and different regions of the heat exchange portion.

In some embodiments, the battery pack 1 includes one first flow equalizing plate 17 or a plurality of first flow equalizing plates 17 disposed side by side in at least one sub-chamber of the first fluid chamber 120, and the extending direction of the first flow equalizing plates 17 is parallel to the direction in which the heat exchange medium flows into the first heat exchange portion 12.

In some embodiments, the battery pack 1 includes one second flow equalizing plate 18 or a plurality of second flow equalizing plates 18 disposed side by side in at least one sub-chamber of the second fluid chamber 130, and the extending direction of the second flow equalizing plates 18 is parallel to the direction in which the compressed air flows into the second heat exchanging part 13.

Optionally, one or more first flow equalization plates 17 are disposed within each subchamber of the first fluid chamber 120. Optionally, one or more second flow equalization plates 18 are disposed within each subchamber of the second fluid chamber 130. Fig. 2 shows a case where a plurality of second flow equalization plates 18 are disposed side by side in each sub-chamber of the second fluid chamber 130.

In the above embodiment, the provision of the first flow equalizing plate 17 and/or the second flow equalizing plate 18 not only helps to make the fluid flow uniformly in the corresponding subchamber, but also helps to increase the heat exchanging area of the fluid and improve the heat exchanging efficiency, similar to the provision of the partition plate.

The above-mentioned partition plate or flow equalizing plate may be a flat plate or a curved plate. The adoption of the flat plate is convenient to process, and the adoption of the curved plate is beneficial to further increasing the heat exchange area of the heat exchange part and the fluid.

In some embodiments, the first divider plate 15 is a flat plate or S-plate.

In some embodiments, the second divider 16 is a flat plate or S-shaped plate.

In some embodiments, the first flow equalization plate 17 is a flat plate or S-plate.

In some embodiments, the second flow equalization plate 18 is a flat plate or S-plate.

Fig. 2 shows a case where the second partition plate 16 and the second flow equalizing plate 18 are both flat plates, wherein the extending directions of the second partition plate 16 and the second flow equalizing plate 18 are both the length directions of the second heat exchanging portion 13.

In some embodiments, the control device 5 described above may be implemented as a general purpose processor, a programmable logic controller (Programmable Logic Controller, abbreviated as PLC), a digital signal processor (Digital Signal Processor, abbreviated as DSP), an application specific integrated circuit (Application Specific Integrated Circuit, abbreviated as ASIC), a Field programmable gate array (Field-Programmable Gate Array, abbreviated as FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or any suitable combination thereof for performing the functions described in this disclosure.

Some embodiments of the present disclosure also provide a vehicle including the above-mentioned thermal management system.

Embodiments of the present disclosure provide vehicles with the advantages of the thermal management systems provided by embodiments of the present disclosure.

Finally, it should be noted that: the above embodiments are merely for illustrating the technical solution of the present disclosure and are not limiting thereof; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will appreciate that: modifications may be made to the specific embodiments of the disclosure or equivalents may be substituted for part of the technical features that are intended to be included within the scope of the claims of the disclosure.

Claims

1. A thermal management system for a vehicle, comprising:

the battery pack (1) comprises an electric core (11), a first heat exchange part (12) and a second heat exchange part (13), wherein the first heat exchange part (12) is thermally coupled with the electric core (11) and is internally provided with a first flow channel, so that the first heat exchange part (12) can exchange heat with the electric core (11) through a heat exchange medium flowing through the first flow channel, and the second heat exchange part (13) is thermally coupled with the first heat exchange part (12) and is internally provided with a second flow channel; and

an air compressor (31) fluidly connected to the second flow passage and configured to provide compressed air to an air brake system of the vehicle through the second flow passage such that the second heat exchange portion (13) exchanges heat with the first heat exchange portion (12) through the compressed air.

2. The thermal management system of claim 1, wherein the thermal management system comprises:

an ambient temperature sensor (41) configured to acquire a temperature T of an environment in which the vehicle is located;

-a thermal management unit (21) fluidly connected to the first heat exchange portion (12) and configured to provide the heat exchange medium to the first heat exchange portion (12); and

And the control device (5) is in signal connection with the ambient temperature sensor (41), the air compressor (31) and the thermal management unit (21) and is configured to determine the working mode of the thermal management system according to the temperature T, the thermal management unit (21) can selectively heat or cool the heat exchange medium in different working modes, and the air compressor (31) can be selectively started or closed so as to enable the heat transfer directions among the electric core (11), the heat exchange medium and the compressed air to be different.

3. The thermal management system of claim 2, wherein,

the thermal management system comprises a first fluid temperature sensor (44), the first fluid temperature sensor (44) being configured to obtain a temperature Twi of the heat exchange medium flowing into the first heat exchange portion (12);

the control device (5) is configured to: if T is less than or equal to T0, the thermal management system is in a first working mode, in the first working mode, the thermal management unit (21) is enabled to heat the heat exchange medium to enable twi=tw1, the heat exchange medium heats the electric core (11) and the compressed air, wherein Tw1 is a first preset temperature, tw1 is greater than Tb1, T0 is the freezing point of moisture in the compressed air, and Tb1 is the lowest temperature at which the electric core (11) can normally work.

4. The thermal management system of claim 3,

the thermal management system comprises a cell temperature sensor (42) and a pressure sensor (43), the cell temperature sensor (42) being configured to obtain a temperature Tb of the cell (11), the pressure sensor (43) being configured to obtain a pressure p of the compressed air;

the control device (5) is configured to: in the first working mode, if Tb is more than or equal to Tb1 and p is more than or equal to p1, the heat exchange medium is stopped from being heated by the heat management unit (21), so that the heat management unit (21) stops heating.

5. The thermal management system according to claim 2, wherein the control device (5) is configured to: if T0 is less than T and less than Tb1, the thermal management system is in a second working mode, in the second working mode, the air compressor (31) is operated with power P, the compressed air heats the battery cell (11), wherein T0 is the freezing point of moisture in the compressed air, and Tb1 is the lowest temperature at which the battery cell (11) can work normally.

6. The thermal management system of claim 5, wherein,

The control device (5) is configured to: if Tw is more than or equal to Tw2, gradually reducing the power P until Tw is basically kept at Tw3, wherein Tw2 is the second preset temperature, tw3 is the third preset temperature, and Tb1 is less than Tw2 and less than Tw3.

7. The thermal management system of claim 5, wherein,

the thermal management system comprises a cell temperature sensor (42), the cell temperature sensor (42) being configured to obtain a temperature Tb of the cell (11);

the control device (5) is configured to: if Tb is more than or equal to Tb1, stopping the operation of the air compressor (31) so as to stop the compressed air from heating the battery cell (11).

8. The thermal management system according to claim 5, wherein the control device (5) is configured to: in the second working mode, the heat management unit (21) heats the heat exchange medium so as to heat the heat exchange medium to the electric core (11).

9. The thermal management system of claim 2, wherein,

the thermal management system comprises a first fluid temperature sensor (44) and a second fluid temperature sensor (45), the first fluid temperature sensor (44) being configured to obtain a temperature tw of the heat exchange medium flowing into the first heat exchange portion (12), the second fluid temperature sensor (45) being configured to obtain a temperature tw of the heat exchange medium flowing out of the first heat exchange portion (12);

The control device (5) is configured to: if T is greater than or equal to Tb1 and Two is greater than Tw4, the thermal management system is in a third working mode, in the third working mode, the thermal management unit (21) is enabled to cool the heat exchange medium so as to enable tw=tw4, the heat exchange medium refrigerates to the electric core (11) and the compressed air, wherein Tw4 is a fourth preset temperature, tw4 is less than Tb2, tb1 is the lowest temperature at which the electric core (11) can work normally, and Tb2 is the highest temperature at which the electric core (11) can work normally.

10. The thermal management system according to any one of claims 1 to 9, comprising a pressure relief valve provided on a gas line between the air compressor (31) and the second heat exchange portion (13) configured to relieve the compressed air in a state in which the pressure p of the compressed air exceeds a safety limit p 0.

11. The thermal management system according to any one of claims 1 to 9, wherein the first heat exchanging portion (12) and the second heat exchanging portion (13) are plate-like structures, and the first heat exchanging portion (12) and the second heat exchanging portion (13) are stacked in a thickness direction of the first heat exchanging portion (12).

12. The thermal management system according to claim 11, wherein the battery pack (1) includes a heat exchange portion partition plate (14) provided between the first heat exchange portion (12) and the second heat exchange portion (13) in a thickness direction perpendicular to the first heat exchange portion (12), the heat exchange portion partition plate (14) partitioning the first flow passage and the second flow passage.

13. The thermal management system of any one of claims 1 to 9,

the first heat exchange part (12) is provided with a first fluid cavity (120), the battery pack (1) comprises at least one first partition plate (15), and the at least one first partition plate (15) is arranged in the first fluid cavity (120) and divides the first fluid cavity (120) into a plurality of subchambers to form the roundabout first flow channel; and/or

The second heat exchange part (13) is provided with a second fluid cavity (130), the battery pack (1) comprises at least one second partition plate (16), and the at least one second partition plate (16) is arranged in the second fluid cavity (130) and divides the second fluid cavity (130) into a plurality of subchambers to form the circuitous second flow channel.

14. The thermal management system of claim 13, wherein,

the first separation plate (15) is provided with a first end and a second end which are oppositely arranged along the self extending direction, the first end of the first separation plate (15) is connected with the cavity wall of the first fluid cavity (120), the second end of the first separation plate (15) and the cavity wall of the first fluid cavity (120) form a first interval, and different subchambers separated by the first separation plate (15) are communicated through the first interval; and/or

The second partition plate (16) is provided with a first end and a second end which are oppositely arranged along the self extending direction, the first end of the second partition plate (16) is connected with the cavity wall of the second fluid cavity (130), a second interval is formed between the second end of the second partition plate (16) and the cavity wall of the second fluid cavity (130), and different subchambers formed by the separation of the second partition plate (16) are communicated through the second interval.

15. The thermal management system of claim 14, wherein,

the plurality of subchambers of the first fluid chamber (120) are arranged side by side, the first heat exchange part (12) is provided with a heat exchange medium inlet (121) and a heat exchange medium outlet (122), the heat exchange medium inlet (121) and the heat exchange medium outlet (122) are respectively arranged on the chamber walls of the two subchambers at the two ends of the arrangement direction of the plurality of subchambers of the first fluid chamber (120), and the heat exchange medium inlet (121) and the heat exchange medium outlet (122) are respectively arranged at one end, far away from the first interval, of the corresponding subchamber; and/or

The multiple subchambers of the second fluid chamber (130) are arranged side by side, the second heat exchange part (13) is provided with a compressed air inlet (131) and a compressed air outlet (132), the compressed air inlet (131) and the compressed air outlet (132) are respectively arranged on the chamber walls of the two subchambers at the two ends of the arrangement direction of the multiple subchambers of the second fluid chamber (130), and the compressed air inlet (131) and the compressed air outlet (132) are respectively arranged at one ends, far away from the second interval, of the corresponding subchambers.

16. The thermal management system of claim 13, wherein,

the battery pack (1) comprises a first flow equalizing plate (17) or a plurality of first flow equalizing plates (17) arranged side by side in at least one subchamber of the first fluid chamber (120), and the extending direction of the first flow equalizing plates (17) is parallel to the direction of the heat exchange medium flowing into the first heat exchange part (12); and/or

The battery pack (1) comprises a second flow equalizing plate (18) arranged in at least one subchamber of the second fluid chamber (130) or a plurality of second flow equalizing plates (18) arranged side by side, and the extending direction of the second flow equalizing plates (18) is parallel to the direction of the compressed air flowing into the second heat exchanging part (13).

17. The thermal management system of claim 16, wherein,

the first separation plate (15) is a flat plate or an S-shaped plate; and/or

The second partition plate (16) is a flat plate or an S-shaped plate; and/or

The first flow equalizing plate (17) is a flat plate or an S-shaped plate; and/or

The second flow equalizing plate (18) is a flat plate or an S-shaped plate.

18. A vehicle comprising a thermal management system according to any one of claims 1 to 17.