CN220021289U - Heat exchange device, battery thermal management system and vehicle - Google Patents

Abstract

The application provides a heat exchange device, a battery thermal management system and a vehicle, wherein the heat exchange device comprises: a first flow guide; the heat conduction piece and the first flow guide piece form a first flow guide cavity for guiding the cooling liquid; the second flow guiding piece and the heat conducting piece form a second flow guiding cavity for guiding the refrigerant, and the refrigerant and the cooling liquid can exchange heat mutually through heat conduction of the heat conducting piece; and the heating piece is arranged in the first diversion cavity. The cooling liquid can be cooled by cooling the cooling liquid in the heat exchange device, and when the temperature of the battery is higher, the cooling liquid with low temperature flows through the battery to cool the battery; when the battery is required to be heated in a low-temperature environment, the cooling liquid can be heated through the heating element, and the heated cooling liquid flows through the battery to heat the battery. Therefore, by enabling the heat exchange device to have an auxiliary heating function, the dual purposes of heating and cooling the battery can be achieved through one component, the number of components is reduced, and the structure is simplified.

Description

Heat exchange device, battery thermal management system and vehicle

Technical Field

The application relates to the technical field of batteries, in particular to a heat exchange device, a battery thermal management system and a vehicle.

Background

The power battery of the new energy automobile can face different working conditions in the working process, for example: under a low-temperature environment, the heat pump system of the power battery cannot heat the power battery in time because stable compression circulation cannot be established in a short time, so that the power battery is charged and discharged at a low temperature, the power battery can be aged, the capacity is attenuated sharply, the service life of the power battery is greatly reduced, and the energy consumption is high; in addition, the power battery can continuously generate heat in the charging and discharging process, and in order to ensure the safe operation of the power battery and prevent the damage of internal components of the power battery and even spontaneous combustion caused by the overhigh temperature, the power battery needs to be cooled to maintain the power battery within a proper temperature range. Therefore, a thermal management system is needed to perform thermal management control on the power battery, so that the power battery is heated at a low temperature and cooled at a high temperature, and the power battery can work in a proper temperature range under different working conditions.

In the prior art, the components and the loops of the thermal management system for heating the power battery and the components and the loops for cooling the power battery are respectively and independently arranged, so that the thermal management system is complex in structure and more in parts, the weight of the whole new energy automobile is increased, the assembly is complex, and after-sales problems are more.

Disclosure of Invention

In view of the above, the utility model provides a heat exchange device which can realize the heating of a battery and the cooling of the battery, so that the structure is simplified, the number of parts is reduced, and the heat exchange device is easier to assemble on the whole vehicle. In addition, the utility model also provides a battery thermal management system with the heat exchange device and a vehicle with the battery thermal management system.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a heat exchange device, comprising:

a first flow guide;

the heat conduction piece and the first flow guide piece form a first flow guide cavity for guiding the cooling liquid;

the second flow guiding piece and the heat conducting piece form a second flow guiding cavity for guiding the refrigerant, and the refrigerant and the cooling liquid can exchange heat mutually through heat conduction of the heat conducting piece;

and the heating piece is arranged in the first diversion cavity.

Optionally, in the above heat exchange device, the heat conducting members include a plurality of stacked heat conducting members, and are located between the first heat conducting member and the second heat conducting member, any two heat conducting members that are adjacently disposed form a heat conducting cavity, and the plurality of heat conducting cavities are the first heat conducting cavity for guiding the cooling liquid and the second heat conducting cavity for guiding the cooling medium respectively;

And in the arrangement direction of the heat conducting piece, the first flow guiding cavity and the second flow guiding cavity are alternately arranged.

Optionally, in the above heat exchange device, the inlet channel and the outlet channel of the cooling liquid penetrate through the first flow guiding member and all the heat conducting members and are communicated with all the first flow guiding cavities;

the refrigerant leading-in channel and the refrigerant leading-out channel penetrate through the first flow guiding piece and all the heat conducting pieces and are communicated with all the second flow guiding cavities.

Optionally, in the above heat exchange device, the inlet channel and the outlet channel of the cooling liquid are respectively disposed on two opposite angles of the first diversion cavity, the inlet channel and the outlet channel of the cooling medium are respectively disposed on two opposite angles of the second diversion cavity, and diagonal lines of the two opposite angles of the first diversion cavity are intersected with diagonal lines of the two opposite angles of the second diversion cavity.

Optionally, in the heat exchange device, the heat conducting piece and the second flow guiding piece are both groove-shaped pieces, the first flow guiding piece is a top cover for closing the notch of the heat conducting piece, and the bottom wall of the heat conducting piece closes the notch of the second flow guiding piece;

and/or the heat conducting piece is provided with an enhanced heat exchange structure for increasing the heat conducting area.

Optionally, in the above heat exchange device, the heating element is an electric heating film adhered to the inner wall of the first diversion cavity.

Optionally, in the above heat exchange device, the heating element is adhered to an inner wall of the first flow guiding cavity, or the electric heating film is suspended in the first flow guiding cavity under the support of the supporting element.

Optionally, in the heat exchange device, a heating surface of the heating element is provided with a plurality of protruding structures or a plurality of groove structures.

Optionally, in the above heat exchange device, the heat exchange member includes:

an electric heating wire;

the lead is electrically connected with the electric heating wire;

the packaging film is used for sealing and packaging the connection part of the electric heating wire and the lead wire;

the lead comprises an extraction part penetrating through the cavity wall of the first diversion cavity, and the extraction part is in sealing connection with the cavity wall. A battery thermal management system, comprising:

a coolant loop for guiding coolant and flowing the coolant through the battery;

a refrigerant loop for guiding the refrigerant and changing the phase state of the refrigerant to provide heat and cold;

the heat exchange device is arranged in the cooling liquid loop and the refrigerant loop;

Wherein the heat exchanger is any one of the heat exchange devices.

Optionally, in the above thermal management system, the cooling liquid loop includes a cooling liquid main path, a first branch path and a second branch path, where the first branch path and the second branch path are arranged in parallel and are connected in series with the cooling liquid main path, the heat exchange device and the battery are arranged in the cooling liquid main path, and the first branch path includes a radiator;

the three-way valve or the proportional regulating valve is provided with an inlet, a first outlet and a second outlet, wherein the inlet is communicated with the cooling liquid main path, the first outlet is communicated with the first branch path, and the second outlet is communicated with the second branch path.

Optionally, in the above thermal management system, the refrigerant loop includes a refrigerant main path, a third branch path and a fourth branch path, where the third branch path and the fourth branch path are arranged in parallel and are all connected in series with the refrigerant main path;

the refrigerant main path comprises a compressor, an evaporator, an electronic expansion valve and a gas-liquid separator, the third branch path comprises an external condenser positioned outside a vehicle and a first stop valve for controlling the on-off of the third branch path, and the fourth branch path comprises an internal condenser positioned in a passenger cabin of the vehicle and a second stop valve for controlling the on-off of the fourth branch path.

A vehicle comprising a heat exchange device according to any one of the preceding claims or a battery thermal management system according to any one of the preceding claims.

When the heat exchange device is applied to a battery thermal management system, the cooling liquid is cooled by the refrigerant, so that the cooling liquid can be cooled, and when the temperature of the battery is higher due to heat generated by charging and/or discharging, the low-temperature cooling liquid flows through the battery to cool the battery, so that the damage of internal components of the battery caused by the overhigh temperature is prevented, and the safe operation of the battery is ensured; when the battery needs to be heated in a low-temperature environment, the cooling liquid can be heated through the heating piece, and the heated cooling liquid flows through the battery to heat the battery, so that the battery can be in a proper temperature range in an initial working stage, the aging of the battery is avoided, the service life of the battery is prolonged, and the energy consumption is reduced. Therefore, through making heat transfer device have auxiliary heating function, just can realize the dual purpose to the heating and the cooling of battery through this part, need not to set up independent cooling part and independent heating part again specially, reduced the setting quantity of part, simplified the structure for use this heat transfer device's battery thermal management system more easily to assemble on whole car, and can reduce after-market problem.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a heat exchange device according to an embodiment of the present application;

fig. 2 is a schematic diagram of operation of a battery thermal management system according to an embodiment of the present application;

FIG. 3 is a schematic diagram of the battery thermal management system operating in a high voltage super fast charge scenario;

fig. 4 is a schematic diagram of the operation of the battery thermal management system in a low temperature heating and passenger compartment heating scenario.

In fig. 1-4:

the device comprises a 1-battery, a 2-heat exchange device, a 3-radiator, a 4-cooling liquid main circuit, a 5-first parallel branch circuit, a 6-second parallel branch circuit, a 7-proportional control valve, an 8-pump, a 9-compressor, a 10-electronic expansion valve, an 11-evaporator, a 12-gas-liquid separator, a 13-external condenser, a 14-internal condenser, a 15-refrigerant main circuit, a 16-third parallel branch circuit, a 17-fourth parallel branch circuit, an 18-first stop valve and a 19-second stop valve;

201-first guide member, 202-heat conducting member, 203-second guide member, 204-heating member, 205-first inlet pipe, 206-first outlet pipe, 207-second inlet pipe, 208-second outlet pipe, 209-reinforcing heat exchange structure.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1, the embodiment of the present application provides a heat exchange device 2, which is mainly used for realizing heat exchange between a refrigerant and a cooling liquid (the cooling liquid is, for example, water or oil) and mainly includes a first flow guiding member 201, a heat conducting member 202, a second flow guiding member 203 and a heating member 204, wherein the first flow guiding member 201 and the heat conducting member 202 form a first flow guiding cavity, the first flow guiding cavity is used for guiding the cooling liquid, the second flow guiding member 203 and the heat conducting member 202 form a second flow guiding cavity, the second flow guiding cavity is used for guiding the refrigerant, and because the heat conducting member 202 has good heat conducting performance, the cooling liquid and the refrigerant with a temperature difference can realize heat exchange through the heat conduction of the heat conducting member 202 when the cooling liquid flows through the first flow guiding cavity and the second flow guiding cavity respectively, for example, when the temperature of the cooling liquid is higher, the low-temperature refrigerant can cool the cooling liquid through the heat conduction of the heat conducting member 202, so that the temperature of the cooling liquid can cool the components that need to be cooled in a high-temperature state, such as a battery. On the basis, the heating element 204 is further arranged in the first diversion cavity, when the heating element 204 works, the cooling liquid flowing through the first diversion cavity can be heated, so that the temperature of the cooling liquid is increased, the cooling liquid can heat components such as a battery in a low-temperature environment and the like which need to be heated, further, the heating element 204 can transfer generated heat to the second diversion cavity through heat conduction of the heat conducting element 202 to heat a refrigerant, and a battery thermal management system (or a heat pump air conditioning system) applying the heat exchange device 2 can establish stable compression circulation as soon as possible in the low-temperature environment.

When the heat exchange device 2 with the structure is applied to a battery thermal management system, cooling liquid is cooled by a refrigerant, so that cooling of the cooling liquid can be realized, and when the temperature of the battery 1 is higher due to heat generated by charging and/or discharging, the cooling liquid with low temperature flows through the battery 1 to realize cooling of the battery 1, so that the condition that the internal components of the battery 1 are damaged or even spontaneous combustion is caused due to the fact that the temperature is too high is prevented, and the safe operation of the battery 1 is ensured; when the battery 1 needs to be heated in a low-temperature environment, if the heat pump air conditioning system cannot establish stable compression circulation in time in the initial working stage, the heating piece 204 can be used for carrying out auxiliary heating on the cooling liquid, and the heated cooling liquid flows through the battery 1 to heat the battery 1, so that the battery 1 can be in a proper temperature interval in the initial working stage, the aging of the battery 1 is avoided, the service life of the battery 1 is prolonged, the energy consumption is reduced, and after the compression circulation of a refrigerant loop is stable, the battery 1 is heated by mainly depending on heat provided by the refrigerant, so that the battery 1 can be continuously in a proper temperature interval in the subsequent working stage. In addition, the heating element 204 can also heat the refrigerant to a certain extent in the initial working stage through the heat conduction of the heat conduction element 202, so that the heat pump air conditioning system can be assisted to establish a stable compression cycle as soon as possible. Therefore, by providing the heat exchange device 2 with an auxiliary heating function, the dual purposes of heating and cooling the battery 1 can be achieved through the component, and no separate cooling component or separate heating component is required to be arranged, so that the number of components is reduced, the structure is simplified, the battery thermal management system using the heat exchange device 2 is easier to assemble on the whole vehicle, and the after-sales problem can be reduced.

Further, as shown in fig. 1, the heat conducting members 202 include a plurality of stacked heat conducting members, and are located between the first heat conducting member 201 and the second heat conducting member 203, any two heat conducting members 202 that are adjacently disposed form a heat conducting cavity, and the plurality of heat conducting cavities are a first heat conducting cavity for guiding cooling liquid and a second heat conducting cavity for guiding cooling medium respectively; and, in the arrangement direction of the heat conductive member 202, the first flow guiding chamber and the second flow guiding chamber are alternately arranged. In order to enhance the heat exchange effect, in the present application, the first flow guiding cavities and the second flow guiding cavities are all provided in multiple numbers, the multiple first flow guiding cavities and the multiple second flow guiding cavities are formed by providing multiple heat conducting pieces 202, and the heat conducting pieces 202 are stacked, two heat conducting pieces 202 which are adjacently provided enclose one flow guiding cavity, and in the flow guiding cavities, a first flow guiding cavity for guiding cooling liquid and a second flow guiding cavity for guiding refrigerant are included, and in the arrangement direction of the heat conducting pieces 202, i.e. in the stacking direction, the first flow guiding cavities and the second flow guiding cavities are alternately provided, for example, the flow guiding cavity of the first layer is the first flow guiding cavity, the flow guiding cavity of the second layer is the second flow guiding cavity, the flow guiding cavity of the third layer is the third flow guiding cavity, the flow guiding cavity of the fourth layer is the second flow guiding cavity … …, and so on. The first flow guide cavities and the second flow guide cavities are alternately arranged in the stacking direction, so that the flow rates of cooling liquid and cooling media can be increased, the contact area of the first flow guide cavities and the second flow guide cavities can be increased, and the heat exchange efficiency is further improved. Furthermore, the heating element 204 is disposed in each first flow guiding cavity, so that the battery 1 can be heated and cooled more efficiently, and the working performance of the battery thermal management system provided by the application is improved significantly.

On the basis of the structure, the leading-in channel and the leading-out channel of the cooling liquid penetrate through the first diversion piece 201 and all the heat conducting pieces 202 and are communicated with all the first diversion cavities; the refrigerant inlet and outlet channels penetrate the first guide member 201 and all the heat conductive members 202, and communicate with all the second guide chambers. That is, in the implementation manner of making the cooling liquid and the refrigerant enter the plurality of first guide cavities and the plurality of second guide cavities, an inlet channel and an outlet channel are provided, and specifically, the channels are preferably conduits, or may be through holes formed in the first guide member 201, the second guide member 203, and the heat conducting member 202, for convenience of description and distinction, the inlet channel and the outlet channel of the cooling liquid are referred to as a first inlet pipe 205 and a first outlet pipe 206, respectively, and the inlet channel and the outlet channel of the refrigerant are referred to as a second inlet pipe 207 and a second outlet pipe 208, respectively. By providing the first introduction pipe 205 and the first discharge pipe 206 which extend into the first flow guiding chamber, the cooling liquid can flow into the first flow guiding chamber from the first introduction pipe 205, flow out of the first flow guiding chamber through the first discharge pipe 206 after heat exchange in the first flow guiding chamber and flow to the battery 1, and likewise, by providing the second introduction pipe 207 and the second discharge pipe 208 which extend into the second flow guiding chamber, the cooling liquid can flow into the second flow guiding chamber from the second introduction pipe 207, flow out of the second flow guiding chamber through the second discharge pipe 208 after heat exchange in the second flow guiding chamber, thereby realizing normal circulation flow of the cooling liquid and the cooling liquid.

Meanwhile, on the basis of using the first introduction pipe 205 and the first discharge pipe 206 to guide the coolant, the second introduction pipe 207 and the second discharge pipe 208 to guide the coolant, the first introduction pipe 205, the first discharge pipe 206, the second introduction pipe 207 and the second discharge pipe 208 may be arranged in various ways, for example, as shown in fig. 1, one each of the first introduction pipe 205, the first discharge pipe 206, the second introduction pipe 207 and the second discharge pipe 208 is arranged, and the pipes are passed through all the first guide members 201 and all the heat conducting members 202 of the second guide member 203 located at the bottommost in the stacking direction, and the second guide member 203 located at the bottommost in the stacking direction is the bottom plate of the whole heat exchange device 2 (the first guide member 201 located at the topmost in the stacking direction is the top plate of the whole heat exchange device 2), so that in order to avoid leakage of the coolant or coolant, the pipes do not need to pass through the second guide member 203, and the first introduction pipe 205 and the first discharge pipe 206 are communicated with each of the first guide chambers, and the second guide members 207 and the second guide pipes 208 are communicated with each of the second guide chambers, for example, and the side walls are communicated with each of the corresponding side walls of the pipes are communicated at each of the positions. By adopting the arrangement mode, the structure of the heat exchange device 2 can be simplified, the components are reduced, and the heat exchange device 2 is easy to manufacture and install. In addition, the first introducing pipe 205, the first discharging pipe 206, the second introducing pipe 207 and the second discharging pipe 208 may be arranged in other manners, for example, a group of introducing pipes and discharging pipes may be arranged for each of the guiding chambers, that is, a first introducing pipe 205 and a first discharging pipe 206 are connected to each of the first guiding chambers, and a second introducing pipe 207 and a second discharging pipe 208 are connected to each of the second guiding chambers.

In the present application, as shown in fig. 1, the flow path of the coolant in the first guide chamber is arranged so as to intersect with the flow path of the coolant in the second guide chamber. Specifically, when the first flow guiding cavity and the second flow guiding cavity are polygonal, such as rectangular, the leading-in channel and the leading-out channel of the cooling liquid are respectively arranged on two opposite angles of the first flow guiding cavity, the leading-in channel and the leading-out channel of the cooling medium are respectively arranged on two opposite angles of the second flow guiding cavity, and the diagonal lines of the two opposite angles of the first flow guiding cavity are intersected with the diagonal lines of the two opposite angles of the second flow guiding cavity. Through such setting, can make coolant liquid and refrigerant flow with the cross direction in adjacent first water conservancy diversion chamber and the second water conservancy diversion chamber that sets up (as shown in fig. 1, wherein the solid arrow is the flow direction of coolant liquid, and the broken line arrow is the flow direction of refrigerant) to can prolong the flow path of coolant liquid and refrigerant and increase the heat transfer duration, and then can further promote heat transfer effect, make heat transfer device 2's heat transfer performance obtain promoting again.

In an alternative embodiment, as shown in fig. 1, the heat conducting member 202 and the second flow guiding member 203 may be both groove-shaped members, the first flow guiding member 201 being a top cover for closing the notch of the heat conducting member 202, and the bottom wall of the heat conducting member 202 closing the notch of the second flow guiding member 203. The groove-shaped heat conducting member 202 and the second flow guiding member 203 include a bottom wall and a plurality of side walls protruding from the bottom wall on the edge of the bottom wall, and all the side walls are enclosed in a ring shape, and the first flow guiding member disposed at the top may be a plate-shaped member. The first flow guiding cavity and the second flow guiding cavity are formed by using the groove-shaped pieces, because the groove-shaped pieces have simple structures, the shapes of all the groove-shaped pieces can be identical (under the condition that the positions of the through holes for the first inlet pipe 205, the first outlet pipe 206, the second inlet pipe 207 and the second outlet pipe 208 to pass through are not considered to be different), when a plurality of groove-shaped pieces are arranged in a stacking way, the groove cavity of each groove-shaped piece can be used for containing and guiding cooling liquid or cooling medium, and the notch of each groove-shaped piece can be blocked by the bottom wall of other groove-shaped pieces arranged adjacent to the groove-shaped piece when the groove-shaped pieces are stacked, so that the groove cavity forms the first flow guiding cavity or the second flow guiding cavity, which is beneficial to forming the first flow guiding cavity and the second flow guiding cavity, and the heat exchanging efficiency of the heat exchanging device 2 can be flexibly adjusted by changing the stacking quantity of the groove-shaped pieces, and meanwhile, the groove-shaped pieces can be produced in batch (for example, the groove-shaped pieces are formed by punching metal plates) can be used for providing convenience for manufacturing and assembling the heat exchanging device 2.

Besides, the heat exchange device 2 may be configured in other manners besides the manner in which the plurality of heat conducting members 202 are stacked and the heat conducting members 202 and the second heat conducting member 203 are both groove-shaped members, for example, the first heat conducting member 201, the plurality of heat conducting members 202 and the second heat conducting member 203 are a plurality of sleeves coaxially sleeved, and the arrangement order of the first heat conducting chamber and the second heat conducting chamber is the same as that described above.

Further, in order to make the heat exchange efficiency higher, the heat conducting member 202 may be further provided with a heat exchange enhancing structure 209 for increasing the heat conducting area. As shown in fig. 1, the enhanced heat exchange structure 209 added to the heat conducting member 202 is, for example, a protrusion structure or a fin structure disposed on the bottom wall and located in the groove, and specifically, the protrusion structure may be formed by punching the bottom wall of the groove-shaped member to form a plurality of protrusions arranged in an array on the bottom wall, and the fin structure may be formed by welding a plurality of fins on the bottom wall.

In an alternative embodiment, as shown in fig. 1, the heating element 204 is an electric heating film disposed in the first flow guiding cavity, and the electric heating film can heat the refrigerant in the second flow guiding cavity through heat conduction of the cavity wall of the first flow guiding cavity. The heating element 204 is selected to be an electrically heated membrane because of its small volume, which is advantageous for placement in a confined space of the flow-guiding chamber. Meanwhile, the electric heating film is preferably arranged on the bottom wall of the heat conducting member 202, so that the electric heating film can be arranged larger, namely, a larger heating area is provided, the cooling liquid can be heated better, the electric heating film can heat the refrigerant in the adjacent second flow guiding cavity through heat conduction of the bottom wall, and the heating member 204 can heat the refrigerant, so that the refrigerant can be further heated, and the refrigerant loop is assisted to establish a stable compression cycle as soon as possible in a mode of assisting in heating the refrigerant when the refrigerant loop does not establish the stable compression cycle. Specifically, in order to meet the working requirements, the power of the electric heating film is 200W-20kW, and the heating mode can be film heating or positive temperature coefficient resistance heating. In addition, the heating element 204 may also be a heating tube, a heating plate, or a heating net.

On the basis that the heating element 204 is of a membranous structure, the heating element 204 can be stuck on the inner wall of the first diversion cavity, so that the heating element 204 is arranged in the first diversion cavity. The arrangement mode is simple and convenient to operate, is convenient to assemble and form, can reserve a larger space for the flowing of the cooling liquid in the first flow guide cavity, and is beneficial to efficient heat exchange of the heat exchange device 2.

Or, the electric heating film is suspended in the first diversion cavity under the support of the support piece, that is, the electric heating film is suspended and supported at the middle position of the first diversion cavity through the support rod, the support and other structures connected with the first diversion piece 201 or the heat conducting piece 202, and when the cooling liquid flows in the first diversion cavity, the cooling liquid surrounds the periphery of the electric heating film, so that the electric heating film can have a larger contact area with the cooling liquid, and the heating efficiency of the cooling liquid is improved.

Similar to the enhanced heat exchange structure 209, the heating surface of the heating element 204 may also be provided with a plurality of raised structures or a plurality of recessed structures, so that the heating surface is rugged, thereby increasing the surface area of the heating surface, so that more cooling liquid can contact with the heating element 204, and improving the heating efficiency of the cooling liquid. Specifically, the bump structure may be a plurality of bumps or bumps arranged in an array on the heating surface, the groove structure is a plurality of grooves arranged in an array on the heating surface, and the grooves are preferably arc-shaped grooves, so as to facilitate the flow of the cooling liquid.

Specifically, the heating member 204 includes: an electric heating wire which generates heat after being electrified; the lead is electrically connected with the electric heating wire, comprises an anode lead and a cathode lead, can be led out from the same position of the first diversion cavity when being led out from the first diversion cavity, can be led out from two symmetrical positions of the first diversion cavity respectively, and ensures that the lead is led out from all the first diversion cavities in the same way; the packaging film seals and packages the electric heating wires and the connection parts of the wires and the electric heating wires, so that the charged components are isolated from the cooling liquid, and the normal operation of the heating element 204 is ensured; the lead comprises a leading-out part penetrating through the cavity wall of the first diversion cavity, and the leading-out part is in sealing connection with the cavity wall so as to prevent the cooling liquid from leaking from the first diversion cavity, and the specific sealing mode is, for example, sealing element arrangement or sealant filling.

As shown in fig. 2 to fig. 4, the embodiment of the present application further provides a battery thermal management system, which is used for performing thermal management on a power battery of a new energy automobile, where the battery thermal management system mainly includes a coolant loop (the coolant loop is a dotted line part in fig. 2), a refrigerant loop (the refrigerant loop is a solid line part in fig. 2), and the above-mentioned heat exchange device 2, where a liquid cooling pipeline of a battery 1 (the battery 1 generally refers to a power battery of the new energy automobile) is connected to the coolant loop, that is, the liquid cooling pipeline of the battery 1 is a component part of the coolant loop, so that the coolant loop can heat the battery 1 in a low-temperature environment and cool the battery 1 at a high temperature; the part of the refrigerant loop has the same function as the heat pump air conditioning system (the refrigerant loop in the application can be understood as the improved heat pump air conditioning system), namely, the heat exchange device 2 is mainly used for providing heat and cold for the cooling liquid loop, the heat exchange device 2 is the transition part between the refrigerant loop and the cooling liquid loop, namely, the heat exchange device 2 is positioned in the cooling liquid loop and is used for realizing heat exchange between the refrigerant loop and the cooling liquid loop, namely, the heat or cold generated by the refrigerant loop is exchanged for the cooling liquid loop, when the heat exchange device 2 exchanges the heat in the refrigerant loop for the cooling liquid loop, the temperature of the cooling liquid (such as water or oil) flowing through the heat exchange device 2 in the cooling liquid loop can be increased, the cooling liquid with the increased temperature can realize heating of the battery 1 when flowing through the battery 1, when the heat exchange device 2 exchanges the cold in the refrigerant loop for the cooling liquid loop, the temperature of the cooling liquid flowing through the heat exchange device 2 in the cooling liquid loop can be reduced, and the cooling liquid flowing through the battery 1 can realize cooling of the battery 1 when the temperature is reduced. In addition, the heat exchange device 2 further includes a heating element 204, where the heating element 204 can at least provide heat for the cooling liquid loop, that is, at least heat the cooling liquid flowing through the heat exchange device 2, so that when the cooling liquid loop cannot provide enough heat in time, the heating element 204 can assist in heating the cooling liquid to temporarily heat the battery 1, so that the cooling liquid loop can cool the battery 1, and also can timely and continuously heat the battery 1.

According to the battery thermal management system, a mode that the heating loop and the cooling loop are mutually independent in the prior art is not adopted, but the heating function and the cooling function are integrated into the same loop, namely the cooling liquid loop, when the battery 1 is required to be heated in a low-temperature environment, if the refrigerant loop cannot establish stable compression circulation in time in the initial working stage, the heating element 204 in the heat exchange device 2 can be used for carrying out auxiliary heating on the cooling liquid in the cooling liquid loop, the heated cooling liquid flows through the battery 1 so as to realize heating on the battery 1, so that the battery 1 can be in a proper temperature interval in the initial working stage, the aging of the battery 1 is avoided, the service life of the battery 1 is prolonged, the energy consumption is reduced, and after the compression circulation of the refrigerant loop is stable, the battery 1 is heated mainly by the heat provided by the refrigerant loop, so that the battery 1 can be continuously in a proper temperature interval in the subsequent working stage; when the temperature of the battery 1 is higher due to heat generated by charging and/or discharging, the cooling liquid in the cooling liquid loop can be cooled by the heat exchange of the heat exchange device 2 on the basis of the cooling capacity provided by the refrigerant loop, and then the cooling liquid with low temperature flows through the battery 1 to cool the battery 1, so that the situation that the internal components of the battery 1 are damaged or even spontaneous combustion is caused due to the overhigh temperature is prevented, and the safe operation of the battery 1 is ensured. Therefore, the heat exchange device 2 with the auxiliary heating function and the cooling liquid loop are matched to work, so that the battery thermal management system can realize the dual functions of heating and cooling only through one loop, the structure of the battery thermal management system is simplified, the number of parts is reduced, the assembly on the whole vehicle is easier, and the after-sales problem can be reduced.

In an alternative embodiment, the heat exchange device 2 includes the first diversion cavity which is communicated with the cooling liquid loop and is used for diversion of the cooling liquid in the cooling liquid loop, and the upper second diversion cavity which is communicated with the cooling medium loop and is used for diversion of the cooling medium in the cooling medium loop, and the cooling liquid flowing through the first diversion cavity can exchange heat with the cooling medium flowing through the second diversion cavity; and, as shown in fig. 1, the heating element 204 is disposed within the first flow directing chamber. The first diversion cavity is a component of a cooling liquid loop and is used for diversion of cooling liquid, the second diversion cavity is a component of a cooling medium loop and is used for diversion of cooling medium, the second diversion cavity and the first diversion cavity are mutually isolated through the heat conducting piece 202 so as to avoid the mixing of the cooling liquid and the cooling medium to influence normal operation, and meanwhile, the second diversion cavity and the first diversion cavity which are mutually isolated also need to ensure that heat and cold can be mutually transferred between each other, so that heat exchange is realized. On the basis, the heating piece 204 is arranged in the first flow guide cavity, and the heating piece 204 is mainly used for carrying out auxiliary heating on the battery 1, so that the heating piece 204 is arranged in the first flow guide cavity, the heating piece 204 can directly heat the cooling liquid flowing through the first flow guide cavity, the cooling liquid can timely and efficiently heat the battery 1, the ageing probability of the battery 1 due to charging and/or discharging in a low-temperature environment is reduced, the service life of the battery 1 is prolonged better, and the energy consumption is also reduced more sufficiently. In addition, under the premise of ensuring normal operation, the heating element 204 can be arranged in the second flow guiding cavity, and the heating element 204 can heat the battery 1 through heat exchange between the second flow guiding cavity and the first flow guiding cavity.

As shown in fig. 2, the cooling liquid loop includes a cooling liquid main path 4, a first parallel branch path 5, a second parallel branch path 6, and a heat exchange device 2, a battery 1 and a radiator 3 which are arranged in series therein, wherein the first parallel branch path 5 and the second parallel branch path 6 are arranged in parallel and are all arranged in series with the cooling liquid main path 4, the heat exchange device 2 and the battery 1 are arranged in the cooling liquid main path 4, and the radiator 3 is arranged in the first parallel branch path 5. The coolant circuit has a function of heating and cooling the battery 1, and by making different parallel branches work in conjunction with the cooling main circuit, the battery 1 can be heated or cooled. As shown in fig. 3, when the first parallel branch 5 provided with the radiator 3 cooperates with the coolant main circuit 4 to form a circuit, the coolant circulates in the circuit under the drive of the pump 8, the coolant which heats up after cooling the battery 1 flows through the first parallel branch 5 and flows into the radiator 3, the radiator 3 radiates the heat carried by the coolant into the surrounding environment, then the coolant flows into the heat exchange device 2, the heat exchange device 2 cools down the coolant, the cooled coolant flows to the battery 1 again and takes away the heat of the battery 1, and the coolant circuit functions to cool the battery 1 in the process; as shown in fig. 4, when the second parallel branch 6 cooperates with the coolant main circuit 4 to form a loop, that is, when the radiator 3 does not work, the heating element 204 of the heat exchange device 2 heats the coolant to raise the temperature of the coolant, the warmed coolant can heat the battery 1 when flowing through the battery 1, at this time, the coolant is cooled, the cooled coolant flows back to the heat exchange device 2 through the second parallel branch 6, the heat exchange device 2 heats the coolant to raise the temperature again, the warmed coolant flows to the battery 1 again to heat the battery 1, and in this process, the function of the coolant loop is to heat the battery 1.

In an alternative embodiment, the communication points of the first parallel branch 5, the second parallel branch 6 and the main coolant circuit 4 are provided with three-way valves for controlling the main coolant circuit 4 to communicate with the first parallel branch 5 or to communicate with the second parallel branch 6. The cooling liquid loop needs to switch the on-off states of the cooling liquid main circuit 4, the first parallel branch circuit 5 and the second parallel branch circuit 6 under different functional conditions, so that a valve is needed to be arranged, and in order to simplify the structure, the reduction of components can be realized by arranging a three-way valve at the communication position of the first parallel branch circuit 5, the second parallel branch circuit 6 and the cooling liquid main circuit 4, when the three-way valve is arranged, the inlet of the three-way valve is communicated with the cooling liquid main circuit 4, and the two outlets (namely, the first outlet and the second outlet) are respectively communicated with the first parallel branch circuit 5 and the second parallel branch circuit 6. In addition, as shown in fig. 2-4, in order to further improve the adjustment accuracy, the three-way valve may be replaced by a proportional adjustment valve 7, so that the flow rate of the cooling liquid may be adjusted while the first parallel branch 5 and the second parallel branch 6 are switched.

As shown in fig. 2, the refrigerant circuit includes a refrigerant main path 15, a third parallel branch path 16, and a fourth parallel branch path 17, and a compressor 9, a condenser, an electronic expansion valve 10, an evaporator 11, and a gas-liquid separator 12 disposed therein in series; the third parallel branch 16 and the fourth parallel branch 17 are arranged in parallel and are all arranged in series with the refrigerant main path 15, the compressor 9, the electronic expansion valve 10, the evaporator 11 and the gas-liquid separator 12 are arranged in the refrigerant main path 15, and the condenser comprises an external condenser 13 arranged on the third parallel branch 16 and positioned outside the vehicle, and an internal condenser 14 arranged on the fourth parallel branch 17 and positioned inside the passenger cabin of the vehicle. In the whole refrigerant circuit, the compressor 9, the condenser, the electronic expansion valve 10, the evaporator 11 and the gas-liquid separator 12 are arranged in sequence, the heat exchange device 2 is arranged in parallel with the evaporator 11 (the heat exchange device 2 can be regarded as another evaporator positioned in the refrigerant circuit), and the electronic expansion valve 10 is arranged in each parallel branch of the heat exchange device 2 and the evaporator 11 for throttling. On the basis, the application comprises two condensers, namely an external condenser 13 and an internal condenser 14, wherein the external condenser 13 is arranged outside the vehicle and is used for releasing heat in a refrigerant loop to the external environment of the vehicle so as to enable the refrigerant to be converted into a liquid state from a gas state, and the internal condenser 14 is arranged in a passenger cabin of the vehicle and is used for releasing heat in the refrigerant loop to the passenger cabin so as to enable the refrigerant to be converted into the liquid state from the gas state and simultaneously enable drivers and passengers in the passenger cabin to warm. In order to realize the switching of the release of heat to the outside of the vehicle or the release of heat to the inside of the vehicle, the refrigerant circuit comprises two parallel branches, namely a third parallel branch 16 and a fourth parallel branch 17, and an external condenser 13 is arranged in the third parallel branch 16 and an internal condenser 14 is arranged in the fourth parallel branch 17, and when heating is not required in the passenger cabin, the third parallel branch 16 is communicated with the refrigerant main path 15 so as to release heat to the outside of the vehicle through the external condenser 13; when heating is needed in the passenger cabin, the fourth parallel branch 17 is communicated with the refrigerant main path 15 so as to release heat to the passenger cabin through the built-in condenser 14, thereby realizing heating of drivers and passengers and meeting the driving comfort requirement of the vehicle.

Specifically, as shown in fig. 2, a first stop valve 18 and a second stop valve 19 are respectively disposed on the third parallel branch 16 and the fourth parallel branch 17, and the first stop valve 18 and the second stop valve 19 control the third parallel branch 16 or the fourth parallel branch 17 to communicate with the refrigerant main path 15. Because the refrigerant circuit needs to switch the on-off states of the refrigerant main circuit 15, the third parallel branch circuit 16 and the fourth parallel branch circuit 17 under different heating conditions, valves are needed to be arranged, and in order to facilitate the arrangement and control, a first stop valve 18 and a second stop valve 19 are preferably arranged on the third parallel branch circuit 16 and the fourth parallel branch circuit 17 respectively, the on-off of the branch circuit is realized by controlling the opening and closing of different stop valves, and further, the control of releasing heat to the outside or releasing heat to the inside is realized.

In summary, the specific application scenario of the battery thermal management system provided by the application is as follows:

A. high-pressure super quick charge

As shown in fig. 3, in the cooling liquid loop, the first parallel branch 5 and the cooling liquid main path 4 are matched to work, that is, the first parallel branch 5 and the cooling liquid main path 4 form a loop, heat generated by the battery 1 is carried into the radiator 3 by cooling liquid, the radiator 3 radiates most of the heat into the environment, the rest of the heat enters the heat exchange device 2 and is radiated by the heat exchange device 2 in an auxiliary way under the carrying of the cooling liquid, the temperature of the cooling liquid is reduced after the cooling liquid is subjected to heat exchange in the heat exchange device 2, and low-temperature cooling liquid flows to the battery 1 again to take away the heat generated by the battery 1; in the refrigerant circuit, the third parallel branch 16 cooperates with the refrigerant main circuit 15, that is, the third parallel branch 16 and the refrigerant main circuit 15 form a circuit, a low-temperature low-pressure refrigerant (the refrigerant may also be referred to as a refrigerant) is evaporated in the heat exchange device 2 to cool the cooling liquid, the evaporated low-temperature low-pressure refrigerant returns to the gas-liquid separator 12, then flows through the compressor 9 to be in a high-temperature high-pressure state, the high-temperature high-pressure refrigerant flows through the third parallel branch 16 to be cooled by the external condenser 13 to be changed into a low-temperature high-pressure liquid refrigerant, then flows through the electronic expansion valve 10 to be throttled to be changed into a low-temperature low-pressure liquid refrigerant, and finally is evaporated in the heat exchange device 2 and the evaporator 11 to absorb heat to cool the cooling liquid, and flows to the gas-liquid separator 12 again.

B. Cryogenic heating and passenger cabin heating

As described above, the heat exchange device 2 can heat the battery 1 at a low temperature, and can supplement heat to the refrigerant circuit, so that the refrigerant circuit can operate efficiently and stably. As shown in fig. 4, in the cooling liquid circuit, the second parallel branch 6 cooperates with the cooling liquid main circuit 4, that is, the second parallel branch 6 and the cooling liquid main circuit 4 form a circuit, the cooling liquid flows through the battery 1 to heat the cooling liquid, then flows through the second parallel branch 6, enters the heat exchange device 2 under the action of the pump 8 to be heated by the heat exchange device 2, flows out of the heat exchange device 2 and flows to the battery 1 to heat the battery 1 again, wherein when the refrigerant circuit does not establish a stable compression cycle, the heat exchange device 2 temporarily heats the cooling liquid through the heating element 204, and after the refrigerant circuit establishes a stable compression cycle, the refrigerant circuit provides heat to heat the cooling liquid so as to enable the battery 1 to maintain a proper working temperature all the time in a low-temperature environment; in the refrigerant loop, the same process of the high-pressure super fast charging is adopted, the refrigerant flows through an external condenser 13, an electronic expansion valve 10, an evaporator 11 and a heat exchange device 2 to heat cooling liquid under the action of a compressor 9, then flows through a gas-liquid separator 12 to return to the compressor 9, and a stable compression cycle is established; when the passenger cabin needs to be warmed, the fourth parallel branch 17 and the refrigerant main path 15 are matched to work, namely, the fourth parallel branch 17 and the refrigerant main path 15 form a loop, the refrigerant from the compressor 9 flows through the fourth parallel branch 17 and dissipates heat into the passenger cabin through the built-in condenser 14, so that the passenger cabin warming is realized, the requirement of riding comfort is met, then the passenger cabin warming is throttled through the electronic expansion valve 10, finally, the passenger cabin warming device flows through the heat exchange device 2 to heat the cooling liquid, and the cooling liquid flows through the gas-liquid separator 12 again to return to the compressor 9.

In addition, the embodiment of the application also provides a vehicle which comprises the heat exchange device or the battery heat management system. Since the vehicle includes the heat exchange device or the battery thermal management system, the vehicle has the beneficial effects brought by the heat exchange device or the battery thermal management system, please refer to the above, and the description is omitted herein.

The basic principles of the present application have been described above in connection with specific embodiments, however, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are merely examples and not intended to be limiting, and these advantages, benefits, effects, etc. are not to be considered as essential to the various embodiments of the present application. Furthermore, the specific details disclosed herein are for purposes of illustration and understanding only, and are not intended to be limiting, as the application is not necessarily limited to practice with the above described specific details.

The block diagrams of the devices, apparatuses, devices, systems referred to in the present application are only illustrative examples and are not intended to require or imply that the connections, arrangements, configurations must be made in the manner shown in the block diagrams. As will be appreciated by one of skill in the art, the devices, apparatuses, devices, systems may be connected, arranged, configured in any manner. Words such as "including," "comprising," "having," and the like are words of openness and mean "including but not limited to," and are used interchangeably therewith. The terms "or" and "as used herein refer to and are used interchangeably with the term" and/or "unless the context clearly indicates otherwise. The term "such as" as used herein refers to, and is used interchangeably with, the phrase "such as, but not limited to.

It is also noted that in the apparatus, devices and methods of the present application, the components or steps may be disassembled and/or assembled. Such decomposition and/or recombination should be considered as equivalent aspects of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood that the terms "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are used for more clearly describing the technical solutions, and are not intended to limit the scope of the present application.

The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the application to the form disclosed herein. Although a number of example aspects and embodiments have been discussed above, a person of ordinary skill in the art will recognize certain variations, modifications, alterations, additions, and subcombinations thereof.

Claims (13)

1. A heat exchange device, comprising:

a first flow guide;

the heat conduction piece and the first flow guide piece form a first flow guide cavity for guiding the cooling liquid;

the second flow guiding piece and the heat conducting piece form a second flow guiding cavity for guiding the refrigerant, and the refrigerant and the cooling liquid can exchange heat mutually through heat conduction of the heat conducting piece;

and the heating piece is arranged in the first diversion cavity.

2. The heat exchange device according to claim 1, wherein the heat conducting members include a plurality of stacked heat conducting members, each of the heat conducting members being located between the first and second heat conducting members, any two of the heat conducting members disposed adjacently forming a heat conducting chamber, the plurality of heat conducting chambers being the first heat conducting chamber for conducting the cooling liquid and the second heat conducting chamber for conducting the cooling medium, respectively;

and in the arrangement direction of the heat conducting piece, the first flow guiding cavity and the second flow guiding cavity are alternately arranged.

3. The heat exchange device according to claim 2, wherein the coolant introduction and discharge passages penetrate the first flow guide member and all the heat conductive members and communicate with all the first flow guide chambers;

The refrigerant leading-in channel and the refrigerant leading-out channel penetrate through the first flow guiding piece and all the heat conducting pieces and are communicated with all the second flow guiding cavities.

4. A heat exchange device according to claim 3, wherein the coolant introduction passage and the coolant discharge passage are provided on two opposite corners of the first guide chamber, respectively, the coolant introduction passage and the coolant discharge passage are provided on two opposite corners of the second guide chamber, respectively, and diagonal lines of the two opposite corners of the first guide chamber intersect diagonal lines of the two opposite corners of the second guide chamber.

5. The heat exchange device of claim 1 wherein the heat transfer member and the second flow guide member are both channel members, the first flow guide member is a top cover closing the heat transfer member slot, and the bottom wall of the heat transfer member closes the second flow guide member slot;

and/or the heat conducting piece is provided with an enhanced heat exchange structure for increasing the heat conducting area.

6. The heat exchange device of any one of claims 1-5, wherein the heating element is an electrically heated membrane disposed within the first flow directing chamber.

7. The heat exchange device of claim 6, wherein the heating element is adhered to an inner wall of the first flow guiding cavity, or the electric heating film is suspended in the first flow guiding cavity under the support of the supporting element.

8. The heat exchange device according to any one of claims 1 to 5, wherein the heating surface of the heating member is provided with a plurality of raised structures or a plurality of recessed structures.

9. The heat exchange device of any one of claims 1-5, wherein the heating element comprises:

an electric heating wire;

the lead is electrically connected with the electric heating wire;

the packaging film is used for sealing and packaging the connection part of the electric heating wire and the lead wire;

the lead comprises an extraction part penetrating through the cavity wall of the first diversion cavity, and the extraction part is in sealing connection with the cavity wall.

10. A battery thermal management system, comprising:

a coolant loop for guiding coolant and flowing the coolant through the battery;

a refrigerant loop for guiding the refrigerant and changing the phase state of the refrigerant to provide heat and cold;

the heat exchange device is arranged in the cooling liquid loop and the refrigerant loop;

wherein the heat exchange device is a heat exchange device according to any one of claims 1-9.

11. The battery thermal management system of claim 10, wherein the coolant loop comprises a coolant main circuit, a first leg, and a second leg, the first leg and the second leg being disposed in parallel and each in series with the coolant main circuit, the heat exchange device and the battery being disposed in the coolant main circuit, the first leg comprising a heat sink;

The three-way valve or the proportional regulating valve is provided with an inlet, a first outlet and a second outlet, wherein the inlet is communicated with the cooling liquid main path, the first outlet is communicated with the first branch path, and the second outlet is communicated with the second branch path.

12. The battery thermal management system of claim 10 or 11, wherein the refrigerant circuit comprises a refrigerant main circuit, a third leg, and a fourth leg, the third leg and the fourth leg being disposed in parallel and each being in series with the refrigerant main circuit;

the refrigerant main path comprises a compressor, an evaporator, an electronic expansion valve and a gas-liquid separator, the third branch path comprises an external condenser positioned outside a vehicle and a first stop valve for controlling the on-off of the third branch path, and the fourth branch path comprises an internal condenser positioned in a passenger cabin of the vehicle and a second stop valve for controlling the on-off of the fourth branch path.

13. A vehicle comprising the heat exchange device of any one of claims 1-9 or the battery thermal management system of any one of claims 10-12.