TWM574983U - Battery pack, battery thermal management system and vehicle - Google Patents

Abstract

The utility model discloses a battery pack, a battery thermal management system and a vehicle. The battery pack comprises: a box body; a plurality of battery modules, the plurality of battery modules are divided into a plurality of rows of battery modules, and each battery module is set to be replaced. Hot parts; a plurality of heat exchange tube assemblies, each row of battery modules corresponding to at least one heat exchange tube assembly, each heat exchange tube assembly comprising a heat exchange tube and two branch tubes, one of the heat exchange tubes being connected in a corresponding row between the heat exchange members of two adjacent battery modules in the battery module, the branch pipes are connected at the inlet or the outlet of the heat exchange member of the battery module at the end of each row of battery modules; the total water inlet pipe and the total outlet pipe, the total inlet pipe and the total outlet pipe are respectively connected to the two branch pipes of each heat exchange tube assembly. Therefore, when the battery pack is in operation, the total inlet pipe can supply heat exchange liquid into the plurality of heat exchange tube assemblies, and the heat exchange liquid can flow through the heat exchange members in each row of the battery modules, thereby improving the operation of the battery cells. Temperature.

Description

Battery pack and battery thermal management system and vehicle

The present invention relates to the field of vehicle technology, and in particular to a battery pack and a battery thermal management system having the same and a vehicle having the battery thermal management system.

At present, electric vehicles are heated due to battery discharge or charging procedures, and the battery pack is generally a sealed structure, so that the air flow inside the battery pack is poor, and the heat transfer efficiency is low, resulting in an increase in the temperature of the power battery, which affects the life of the battery.

This creation aims to solve at least one of the technical problems in the related art to some extent. To this end, the present invention proposes a battery pack in which the battery module has a good heat exchange effect and a suitable operating temperature.

This creation further proposes a battery thermal management system.

This creation further proposes a vehicle.

According to the battery pack of the present invention, comprising: a box body; a plurality of battery modules, the plurality of battery modules are disposed in the box body, the plurality of battery modules are divided into a plurality of rows of battery modules, and each of the battery modules is provided with heat exchange a plurality of heat exchange tube elements, each row of the battery module corresponding to at least one heat exchange tube element, each of the heat exchange tube elements comprising a plurality of independent heat exchange tubes and two branch tubes, each of the heat exchange tube elements The heat exchange tube is connected between heat exchange members of adjacent two battery modules in a row of battery modules, and the branch tube of each of the heat exchange tube elements is connected to the battery at the end of each row of battery modules At the inlet or outlet of the heat exchange member of the module; a total inlet pipe and a total outlet pipe, the total inlet pipe and the total outlet pipe are respectively connected to the two branch pipes of each of the heat exchange tube members.

Therefore, when the battery pack is in operation, the total inlet pipe can supply the heat exchange liquid into the plurality of heat exchange tube components, and the heat exchange liquid enters the plurality of heat exchange tube components respectively, thereby flowing through the heat exchange members in each row of the battery modules. And heat exchange with the battery core in the heat exchange member, thereby improving the operating temperature of the battery core, extending the working life of the battery core, and thus the temperature difference between the battery modules is small, the temperature distribution of the battery pack is uniform, and the work is performed. Good reliability.

In some examples of the present creation, each of the heat exchange members is provided with an interface for communicating with the heat exchange tubes on the corresponding battery module.

In some examples of the present creation, the heat exchange tube is a bellows.

In some examples of the present creation, the upper surface of the battery module is provided with a limiting member that limits the degree of freedom of the heat exchange tube.

In some examples of the present creation, the stop member is a snap ring in which the heat exchange tube is snapped.

In some examples of the present creation, the heat exchange liquid in the plurality of heat exchange tubes assembly flows in the same direction, the total inlet pipe is located at one side of the plurality of battery modules, and the total outlet pipe is located on the opposite side of the plurality of battery modules .

In some examples of the present creation, each row of battery modules corresponds to two heat exchange tube assemblies, and the flow direction of the heat exchange tube assemblies alternates.

In some examples of the present creation, the total inlet pipe and the total outlet pipe are disposed on opposite sides of the plurality of battery modules.

In some examples of the present creation, the branch tube is L-shaped to fit the side and upper surfaces of the battery module.

In some examples of the present creation, at least one length of the total inlet pipe and the total outlet pipe is rectangular.

In some examples of the present creation, each of the heat exchange tubes is provided with a joint at both ends thereof.

In some examples of the present creation, each of the battery modules includes a battery pack, the heat exchange member being a heat exchange plate disposed on one side of the battery core group.

In some examples of the present creation, a thermal pad is interposed between the heat exchange plate and the set of cells.

According to the battery thermal management system of the present invention, comprising: the battery pack; the heat exchange loop pipe, the two ends of the heat exchange loop pipe are respectively connected with the total inlet pipe and the total outlet pipe; the refrigeration system and the warm air a system comprising a compressor, a condenser and a heat exchanger, the heat exchanger comprising a first heat exchange channel and a second heat exchange channel that exchange heat with each other, the first heat exchange channel being connected in series to the compressor and the Between the condensers, the second heat exchange channel is a part of the heat exchange loop pipe, the warm air system is used for heating air, and the warm air system comprises a warm air pipe, the warm air pipe and the heat exchange loop channel Optionally, a first PTC heater for selectively heating the heat exchange liquid within the heat exchange loop passage.

In some examples of the present creation, the refrigeration system further includes a third heat exchange passage connected in series between the compressor and the condenser, the third heat exchange passage and the warm air duct being interchanged heat.

In some examples of the present creation, the battery thermal management system further includes a first control valve that is selectively in communication with the heat exchange loop passage through the first control valve.

In some examples of the present creation, the first control valve regulates a flow rate of the heat exchange liquid flowing from the heat exchange loop passage into the total inlet pipe, and regulates heat exchange from the heat exchange loop passage into the warm air passage. The flow of liquid.

In some examples of the present creation, the first control valve includes a first valve port, a second valve port, and a third valve port, the first valve port of the first control valve being in communication with an outlet of the first PTC heater, a second valve port of the first control valve is in communication with the warm air duct, a third valve port of the first control valve is in communication with the total inlet pipe, a first valve port of the first control valve and the first control valve The second valve port is connected and the flow rate is adjustable, and the first valve port of the first control valve is in communication with the third valve port of the first control valve and the flow rate is adjustable.

In some examples of the present creation, the battery thermal management system further includes a second control valve, the total outlet pipe selectively connecting the inlet of the first PTC heater and the inlet of the total inlet pipe through the second control valve One.

In some examples of the present creation, the second control valve includes a first valve port, a second valve port, and a third valve port, the first valve port of the second control valve being in communication with the total outlet pipe, the second control a second valve port of the valve is in communication with the total inlet pipe, a third valve port of the second control valve is in communication with the first PTC heater, and a first valve port of the second control valve is selectively connectable to the second valve port Controlling the second valve port of the valve or the third valve port of the second control valve.

In some examples of the present creation, the warm air system further includes a second PTC heater that selectively heats the heat exchange liquid within the warm air duct.

The vehicle according to the present invention includes the battery thermal management system described.

Embodiments of the present creation are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and are intended to be illustrative of the present invention and are not to be construed as limiting.

A battery pack 1000 according to the present embodiment will be described in detail below with reference to the accompanying drawings, which can be applied to a vehicle as a power battery.

As shown in FIGS. 7 to 9 and FIGS. 11 and 12, the battery pack 1000 according to the present embodiment may include: a case 1, a plurality of battery modules 31, a plurality of heat exchange tube assemblies, and a total water inlet pipe 33. And the total outlet pipe 34, the plurality of battery modules 31 are disposed in the casing 1, and the casing 1 can function to protect and fix the plurality of battery modules 31.

As shown in FIG. 1 and FIG. 3 to FIG. 5 , the plurality of battery modules 31 are all part of the battery 3 , and the plurality of battery modules 31 are divided into a plurality of rows of battery modules 31 , and each of the battery modules 31 is provided with heat exchange. In the device 312, the battery module 31 is distributed with a battery core 311, and the heat exchange member 312 can exchange heat with the battery core 311 to improve the operating temperature of the battery core 311. For example, when the battery core 311 operates at a high temperature, the heat exchange member 312 can be supplied with heat exchange liquid to reduce the operating temperature of the battery core 311; for example, when the battery core 311 is operated and the temperature is low, the heat exchange member 312 can supply the high temperature heat exchange liquid to raise the operating temperature of the battery core 311.

Each row of battery modules 31 corresponds to at least one heat exchange tube element. For example, as shown in Figures 7 to 9, each row of battery modules 31 corresponds to a heat exchange tube element, as shown in Figures 11 and 12, respectively. It is shown that each row of battery modules 31 corresponds to two heat exchange tube assemblies. Each heat exchange tube element includes a plurality of independent heat exchange tubes 32, and a plurality of independent heat exchange tubes 32 may be spaced apart in the row direction of the battery module 31, and any one of the heat exchange tubes 32 of each heat exchange tube element Connected between the heat exchange members 312 of the adjacent two battery modules 31 in the corresponding row of battery modules 31. Thus, each heat exchange tube element can connect the heat exchange members 312 in the corresponding row of battery modules 31.

As shown in Figs. 15 to 17, each of the heat exchange tube members further includes a branch pipe at both ends and for connecting the total inlet pipe 33 and the total outlet pipe 34, respectively, wherein a branch pipe is connected to the main inlet pipe 33, The other branch pipe is connected to the main water outlet pipe 34, and the branch pipe of each heat transfer pipe element is connected at the inlet or the outlet of the heat exchange member 312 of the battery module 31 at the end of each row of the battery module 31. The branch pipe is arranged to connect the main water inlet pipe 33 and each row of the battery modules 31, and to connect the main water outlet pipe 34 and each row of the battery modules 31.

Therefore, when the battery pack 1000 is in operation, the total water inlet pipe 33 can supply the heat exchange liquid into the plurality of heat exchange tube components, and the heat exchange liquid enters the plurality of heat exchange tube components respectively, so that the flow can flow through each row of the battery modules 31. The heat member 312 exchanges heat with the battery cell 311 in the heat exchange member 312, thereby improving the operating temperature of the battery cell 311, extending the working life of the battery cell 311, and thus the temperature difference between the battery modules 31 is small. The temperature distribution of the battery pack 1000 is uniform and the working reliability is good.

There are various ways of connecting the total inlet pipe 33 and each heat exchange pipe element, and there are various connection modes between the total outlet pipe 34 and each heat exchange pipe element, for example, the total inlet pipe 33 and each heat exchange pipe component. It can be directly connected, and the total outlet pipe 34 can be directly connected with each heat exchange pipe element; for example, a water inlet connection pipe 35, a total outlet pipe 34 and each heat exchange pipe are connected between the total inlet pipe 33 and each heat exchange pipe element. A water outlet connection pipe 36 is connected between the components.

Optionally, each heat exchange member 312 is provided with an interface for communicating with the heat exchange tube 32 on the corresponding battery module 31, wherein the interface may be perpendicular to the upper surface of the battery module 31. The interface may be disposed on the upper surface of the battery module 31, so as to avoid affecting the arrangement of the plurality of battery modules 31 in the casing 1, and may facilitate the heat exchange tube components to sequentially heat the heat exchange members in the battery module 31. 312 connection. As shown in FIG. 2, each heat exchange member 312 has a liquid inlet interface 3121 and a liquid outlet interface 3122. The liquid inlet interface 3121 and the liquid outlet interface 3122 have the same structure, and the liquid inlet interface 3121 is used to connect the upstream heat exchange tubes 32. The liquid outlet interface 3122 is used to connect the downstream heat exchange tubes 32. The heat exchange member 312 has a heat exchange liquid, and the heat exchange liquid can enter the heat exchange member 312 from the liquid inlet interface 3121, and the heat exchange liquid entering the heat exchange member 312 exchanges heat with the battery core 311 and then flows out from the liquid outlet interface 3122. The piece 312 implements heating or cooling of the battery cell 311.

Preferably, the heat exchange tube 32 can be a bellows having a certain degree of flexibility to effectively absorb mounting tolerances.

According to an alternative embodiment of the present invention, the upper surface of the battery module 31 is provided with a limiting member that limits the degree of freedom of the heat exchange tube 32. The limiting member can effectively limit the heat exchange tubes 32 between the two battery modules 31, so that the position reliability of the heat exchange tubes 32 can be ensured, thereby ensuring the structural reliability of the battery pack 1000.

Specifically, the limiting member is a snap ring 38, and the heat exchange tube 32 is snapped into the snap ring 38. The snap ring 38 can effectively prevent the heat exchange tube 32 from randomly shaking, thereby ensuring the connection temperature of the heat exchange tube 32 and avoiding the occurrence of abnormal noise.

Optionally, as shown in FIG. 7 to FIG. 9, the heat exchange liquids in the plurality of heat exchange tubes are flowed in the same direction, the total inlet pipe 33 is located at one side of the plurality of battery modules 31, and the total outlet pipe 34 is located at the plurality of battery modules. 31 on the opposite side. Thus, the total inlet pipe 33 and the total outlet pipe 34 are arranged reasonably, and the corresponding heat exchange tubes 32 can be respectively connected to the total inlet pipe 33 and the total outlet pipe 34, so that the manufacturing difficulty of the battery pack 1000 can be reduced, and the battery pack 1000 can be reduced. manufacturing cost.

Alternatively, as shown in Fig. 15, each row of battery modules 31 corresponds to two heat exchange tube assemblies, and the flow directions of the two heat exchange tube assemblies alternate. In other words, each of the battery modules 31 can correspond to the two heat exchange members 312, and the heat exchange liquids in the two heat exchange members 312 flow in opposite directions, so that the heat exchange between the two heat exchange members 312 and the battery core 311 can be performed well. It is advantageous to improve the temperature uniformity between the battery modules 31.

Further, the opposite sides of the plurality of battery modules 31 are provided with a total inlet pipe 33 and a total outlet pipe 34. Among them, the branch pipe can be divided into an inlet water connection pipe 35 and a water outlet connection pipe 36. Specifically, the liquid inlet interface 3121 of the heat exchange member 312 of the first battery module 31 of each row of the battery modules 31 is connected to the total water inlet pipe 33 through the water inlet connection pipe 35, and the last of each row of battery modules 31 The liquid discharge interface 3122 of the heat exchange member 312 of one battery module 31 is connected to the total outlet pipe 34 through the water outlet connection pipe 36. The number of the water inlet connecting pipes 35 and the number of the water outlet connecting pipes 36 are the same as the number of the battery modules 31.

Optionally, both the inlet connection pipe 35 and the outlet connection pipe 36 may be bellows, and the bellows has a certain degree of flexibility, and can effectively absorb installation tolerances.

One end of the water inlet connecting pipe 35 and the liquid inlet interface 3121 of the heat exchange member 312 of the first battery module 31 of each row of the battery modules 31 are detachably connected through the adapter 37, and the water inlet pipe 35 is additionally connected. One end is detachably connected to the main inlet pipe 33 through the adapter 37; one end of the outlet connection pipe 36 and the liquid outlet interface 3122 of the heat exchange member 312 of the last battery module 31 of each row of the battery modules 31 are transferred. The head 37 is detachably connected, and the other end of the outlet connection pipe 36 is detachably connected to the total outlet pipe 34 through a joint 37. The circulation pipe of the heat exchange liquid adopts the above arrangement and connection manner, is convenient to install and disassemble, and has small occupied space, and the connection is stable and reliable.

As shown in Figs. 8 and 9, the total inlet pipe 33 and the total outlet pipe 34 are provided on the bottom plate of the casing 11, and the liquid inlet interface 3121 and the liquid outlet interface 3122 are provided at the top of the battery module 31, so that water is introduced. The connecting pipe 35 and the water outlet connecting pipe 36 are L-shaped pipes, so that the water inlet connecting pipe 35 and the water outlet connecting pipe 36 can respectively fit the side surface and the upper surface of the battery module 31.

Also, the snap ring 38 can also be used to secure the inlet connection conduit 35 and the outlet connection conduit 36. Preferably, the water inlet connecting pipe 35 can be fixed by a snap ring 38 disposed on the edge of the first battery module 31 in each row of the battery modules 31, and the water outlet connecting pipe 36 can pass a card. The ring 38 is fixed, and the snap ring 38 is disposed on the edge of the last battery module 31 in each row of the battery modules 31, so that the water inlet connecting pipe 35 and the water outlet connecting pipe 36 are not randomly shaken, the connection is stable, and the difference is avoided. ring.

Optionally, at least one length of the main inlet pipe 33 and the total outlet pipe 34 is rectangular. The rectangular pipe section can facilitate the connection of the branch pipe, and this can facilitate the arrangement of the total inlet pipe 33 and the total outlet pipe 34 in the casing 1.

Further, each of the heat exchange tubes 32 is provided with a joint at both ends thereof. The adapter can be used to connect with the interface of the corresponding heat exchange tube 32. The arrangement of the adapter can ensure the connection reliability between the heat exchange tube 32 and the heat exchange member 312 on the one hand, and can reduce the heat exchange tube 32 on the other hand. Difficulty in connection with the heat exchange member 312.

As shown in FIG. 3 to FIG. 5 and FIG. 13 to FIG. 14 , each of the battery modules 31 includes a battery core group, the heat exchange member 312 is a heat exchange plate, and the heat exchange plate is disposed in the battery core group. side. For example, as shown in Figures 3 to 5, the heat exchange plates can be sandwiched between the two cell groups such that one heat exchange plate can simultaneously exchange heat with the two sets of cells; for example, Figure 13 As shown in Fig. 14, the two battery core groups can be close to each other, and then the two heat exchange plates can be attached to the side of the two battery core groups away from each other.

Each of the cell groups includes at least one row of cells 311, and each row of cells 311 includes at least one cell 311. It can be understood that when each row of cell groups includes a plurality of rows of cells 311, the plurality of rows of cells 311 are sequentially arranged from top to bottom.

The arrangement position and structure of the heat exchange member 312 can be applied to the structure in which the battery core 311 is stacked upward, and the space in the height direction can be effectively utilized to increase the capacitance of the battery module 31 while ensuring each battery core 311. Both are in direct contact with the heat exchange plate, and the contact area is large, and the heat conduction efficiency is high, so that the heat exchange effect is good.

It can be understood that the middle portion of the battery module 31 (for example, between two rows of battery groups) has poor heat dissipation conditions and severe temperature rise, and the heat exchange plate is sandwiched between two rows of battery groups. The temperature of the most severe area of the battery module 31 can be effectively reduced.

Preferably, the heat exchange member 312 is vertically mounted inside the battery module 31, and has a simple structure and convenient installation.

Further, a heat conducting pad 313 is interposed between the heat exchange plate and each column of the battery core, and the battery core 311 and the heat exchange plate are in contact with each other through the thermal pad 313 to absorb the mounting tolerance, increase the contact area, and further improve the replacement. Thermal effect.

In the embodiment shown in FIG. 4 and FIG. 5, the thermal pad 313 is two, and the two thermal pads 313 are respectively disposed on both sides of the heat exchange plate.

The battery thermal management system 10000 according to the present embodiment will be described in detail below with reference to the accompanying drawings. As shown in FIGS. 1 to 10, the battery thermal management system 10000 according to the present embodiment includes the battery pack 1000, the heat exchange loop pipe, the refrigeration system 4, the warm air system 5, and the first PTC heating of the above embodiment. 6.

The battery pack 1000 can be installed on an electric vehicle, and provides power output for the electric vehicle and an energy storage device for powering other electric devices on the vehicle, and can be repeatedly charged. A plurality of battery modules 31 may be disposed in the battery pack 1000.

The battery pack 1000 has a total water inlet 21 formed on the total water inlet pipe 33 and a total water outlet port 22 formed on the total water outlet pipe 34. The two ends of the heat exchange loop pipe are respectively connected to the total water inlet 21 and the total water outlet 22, that is, the heat exchange loop pipe is connected between the total water inlet 21 and the total water outlet 22.

The heat exchange liquid flows from the total water inlet 21 into the heat exchange between the battery pack 1000 and the battery pack 1000, and then flows out from the total water outlet 22 to the heat exchange loop pipe, so that the heat exchange liquid exchanges heat with the battery pack 1000.

The refrigeration system 4 and the warm air system 5, the refrigeration system 4 includes a compressor 42, a condenser 43, and a heat exchanger 41, and the refrigerant flows in a loop in the compressor 42, the condenser 43, and the heat exchanger 41, and a state change occurs, and The outside exchanges heat to achieve cooling in the cab. In the presently described embodiment, the refrigeration system 4 provides cooling power to the thermal management system 10000.

The heat exchanger 41 includes a first heat exchange passage 411 and a second heat exchange passage 412 which exchange heat with each other, the first heat exchange passage 411 is connected in series between the compressor 42 and the condenser 43, and the second heat exchange passage 412 is heat exchange. A part of the loop pipe, that is, the refrigerant flowing in the first heat exchange passage 411 is a refrigerant, and the second heat exchange passage 412 is connected in series between the total water inlet 21 of the battery pack 1000 and the total water outlet 22, and the second heat exchange passage 412 is The flow is the heat exchange liquid.

Preferably, the heat exchanger 41 is a plate heat exchanger 41, so that the structure is simple and the cost is low.

The heating system 5 is used to heat the air to achieve heating in the cab.

The heating system 5 includes a warm air duct 51, and the warm air duct 51 is selectively connectable with the heat exchange loop pipe, that is, when the warm air system 5 needs to be turned on, the heat exchange liquid in the heat exchange loop pipe can be Flowing into the warm air passage 51, thereby flowing in the warm air duct 51 is also a heat exchange liquid, and when the heat exchange liquid is heated, the warm air passage 51 exchanges heat with the air flowing through it to achieve heating in the cab; When the heating system 5 needs to be turned on, the heat exchange liquid in the heat exchange loop pipe may not flow into the warm air passage 51, and the flow path of the heat exchange liquid may be reasonably selected according to the demand to reduce heat loss.

The first PTC heater 6 provides heating power to the battery pack 1000 of the thermal management system 10000. The first PTC heater 6 is configured to selectively heat the heat exchange liquid in the heat exchange loop passage, and when the heat exchange liquid needs to be heated, the first PTC heater 6 is energized, and when the heat exchange liquid is not required to be heated, The first PTC heater 6 is powered off.

The water pump loop 2006 can be provided with a water pump 2006 and a water tank 2007. The water pump 2006 mainly provides power for the circulation system of the heat exchange liquid. The water tank 2007 is mainly used for adding a heat exchange liquid to the heat exchange liquid circulation system and storing the heat exchange liquid.

In a specific embodiment of the present creation, the inlet and outlet of the water tank 2007, the inlet of the water pump 2006, and the outlet of the second heat exchange passage 412 may be in communication through the first three-way valve 91.

Alternatively, the water tank 2007 may be a secondary water tank of the electric vehicle 100000, so that the thermal management system 10000 can utilize the existing components of the electric vehicle 100000, saving cost and layout space.

When the temperature of the battery pack 1000 is too low, the thermal management system 10000 is activated, the first PTC heater 6 is energized, and the first PTC heater 6 utilizes the thermistor characteristic, the resistance rapidly increases with temperature, and the resistance heats up after energization.

At this time, if the heating system 5 is not turned on in the cab, as shown in FIGS. 1 and 10, the heat exchange liquid sequentially flows through the second heat exchange passage 412, the water pump 2006, the first PTC heater 6, and the battery pack 1000. The second heat exchange passage 412, and the heat exchange liquid can exchange heat with the refrigerant in the first heat exchange passage 411 at the second heat exchange passage 412, so that the first PTC heater 6 heats the heat exchange liquid, and the pair can be realized. Heating of the battery pack 1000. When the temperature of the battery pack 1000 exceeds a predetermined value, the heating power of the first PTC heater 6 is gradually decreased to maintain the battery pack 1000 at a suitable temperature.

At this time, if the heating system 5 is turned on in the cab, as shown in FIG. 1 and FIG. 10, the heat exchange liquid sequentially flows through the water pump 2006, the first PTC heater 6, and the battery pack 1000, and a part of the heat exchange liquid enters the second heat exchange. The passage 412, and the heat exchange liquid can exchange heat with the refrigerant in the first heat exchange passage 411 at the second heat exchange passage 412, so that the first PTC heater 6 heats the heat exchange liquid to realize heating of the battery pack 1000, The other portion enters the warm air passage 51, and the air is blown through the warm air passage 51 in the warm air passage 51 to heat the cab.

Of course, in order to improve the comfort of the user, the heat demand of the warm air passage 51 can be preferentially satisfied. When the temperature in the cab reaches a predetermined temperature, it is only necessary to maintain the temperature in the cab to maintain balance.

It can be understood that maintaining the temperature in the cab to maintain balance means that when the temperature of the battery pack 1000 rises, the temperature of the battery pack 1000 is higher than the temperature of the heat exchange liquid, and the heat of the battery pack 1000 can be used for heating. The heat exchange liquid can thereby reduce the heating power of the first PTC heater 6, maintain the temperature of the supply cab, and achieve the purpose of rational utilization of energy.

According to the battery pack 1000 thermal management system 10000 of the presently-created embodiment, the heat exchange liquid can be heated by the first PTC heater 6 to effect heating of the battery pack 1000 and heating of the cab.

When the temperature of the battery pack 1000 is too high, the thermal management system 10000 is started, the compressor 42 of the refrigeration system 4 is started, the refrigerant is compressed, and after being cooled by the condenser 43, the refrigerant is expanded by the expansion valve and then enters the first heat exchange passage 411. The refrigerant in the refrigeration system 4 exchanges heat with the heat exchange liquid of the second heat exchange passage 412. After the heat exchange liquid is cooled, it is driven by the water pump 2006, and is returned between the heat exchange loop pipe and the battery pack 1000. The ring is heat exchanged with the battery pack 1000 to lower the temperature of the battery pack 1000.

When the cab needs to be turned on to cool down the cab, the refrigeration system 4 satisfies the cooling requirements of the battery pack 1000 and satisfies the cooling requirements in the cab.

When the battery pack 1000 does not need to be cooled or heated, if the temperature difference between the battery modules 31 exceeds the set value, the water pump 2006 can be separately activated to perform heat exchange liquid circulation inside the battery pack 1000, thereby reducing the battery mode. The temperature difference between group 31.

According to the thermal management system 10000 of the present embodiment, the cooling of the heat exchange liquid is achieved by heat exchange between the refrigerant of the refrigeration system 4 of the electric vehicle 1000 and the heat exchange liquid to achieve cooling of the battery pack 1000, through the first PTC heater 6. The heating of the heat exchange liquid is realized to realize the function of heating the battery pack 1000 and the cab, and in different external environments, the battery pack 1000 is still at a suitable temperature, and the temperature uniformity and temperature stability of the battery pack 1000 are ensured. The heat management is more efficient, and heat exchange with the battery pack 1000 is performed by the heat exchange liquid, so that the heat of the battery pack 1000 is uniform, the temperature difference between the plurality of battery modules 31 in the battery pack 1000 is small, and the space of the heat exchange loop pipe is small. The utility model has the advantages of low cost and no need to increase too much peripheral device to drive the heat exchange liquid to flow around the heat exchange loop pipe and the battery pack 1000, thereby saving power consumption of the electric vehicle.

In addition, according to the thermal management system 10000 of the present embodiment, combining the air conditioning system of the electric vehicle 100000 with the heating and cooling of the battery pack 1000 can preferentially ensure the use requirement of the air conditioning system. When the temperature of the battery pack 1000 reaches a predetermined value, The energy of the battery pack 1000 can supplement the heating power of the first PTC heater 6 to achieve the purpose and effect of fully utilizing the energy of the entire vehicle.

Some specific embodiments of the battery thermal management system 10000 in accordance with the present teachings are described in detail below with reference to FIGS. 1 and 10.

As shown in FIGS. 1 and 10, the battery thermal management system 10000 according to the present creative embodiment includes a battery pack 1000, a heat exchange loop pipe, an air conditioner system of the electric car 100000 including the refrigeration system 4 and the heater system 5, The first PTC heater 6, the first control valve 7, and the second control valve 8.

The battery pack 1000 has a total water inlet 21 and a total water outlet 22, and two ends of the heat exchange loop pipe are connected to the total water inlet 21 and the total water outlet 22, respectively. The refrigeration system 4 includes a compressor 42, a condenser 43, and a heat exchanger 41. The heat exchanger 41 includes a first heat exchange passage 411 and a second heat exchange passage 412 which exchange heat with each other, the first heat exchange passage 411 is connected in series between the compressor 42 and the condenser 43, and the second heat exchange passage 412 is heat exchange. A part of the loop pipe. The first PTC heater 6 is for selectively heating the heat exchange liquid in the heat exchange loop passage.

The warm air system 5 includes a warm air duct 51. The warm air duct 51 and the heat exchange loop duct are selectively communicated through the first control valve 7, whereby the control is simple and the switching of the operation mode of the thermal management system 10000 is facilitated.

Specifically, the first control valve 7 can adjust the flow rate of the heat exchange liquid flowing from the heat exchange loop passage into the total water inlet 21, and the first control valve 7 can regulate the heat exchange from the heat exchange loop passage into the warm air passage 51. The flow of liquid. That is, the first control valve 7 is a flow regulating valve.

More specifically, as shown in FIGS. 1 and 10, the first control valve 7 includes a first valve port A1, a second port A2, and a third port A3, and the first port A1 of the first control valve 7 In communication with the outlet of the first PTC heater 6, the second port A2 of the first control valve 7 is in communication with the warm air duct 51, and the third port A3 of the first control valve 7 is in communication with the total water inlet 21.

The first valve port A1 of the first control valve 7 communicates with the second valve port A2 of the first control valve 7 and the flow rate is adjustable. For example, the opening size of the communication between the first valve port A1 and the second valve port A2 can be adjusted.

The first valve port A1 of the first control valve 7 communicates with the third valve port A3 of the first control valve 7 and the flow rate is adjustable. For example, the opening size of the communication between the first valve port A1 and the third valve port A2 can be adjusted.

That is to say, if the heating system 5 is turned on in the cab, the heat exchange liquid in the heat exchange loop passage, after being heated by the first PTC heater 6, can all flow into the warm air duct 51 through the warm air duct 51 and then flow into the total feed. The nozzle 21 may also directly flow into the total water inlet 21, and may partially flow into the warm air duct 51 and the other portion may flow into the total water inlet 21.

The total water outlet 22 is selectively connectable to one of the inlet of the first PTC heater 6 and the total water inlet 21 through the second control valve 8, that is, when the second control valve 8 communicates with the total water outlet 22 and the first At the inlet of the PTC heater 6, the heat exchange liquid may be heated by the first PTC heater 6 and then flow into the total water inlet 21, and when the second control valve 8 communicates with the total water outlet 22 and the total water inlet 21, the heat exchange liquid may not After being heated by the first PTC heater 6, it flows directly into the total water inlet 21.

More specifically, as shown in FIGS. 1 and 10, the second control valve 8 includes a first port B1, a second port B2, and a third port B3, and the first port B1 of the second control valve 8 In communication with the total water outlet 22, the second valve port B2 of the second control valve 8 communicates with the total water inlet 21, and the third valve port B3 of the second control valve 8 communicates with the inlet of the first PTC heater 6.

The first port B1 of the second control valve 8 is selectively communicable with the second port B2 of the second control valve 8 or the third port B3 of the second control valve 8. The second control valve 8 can be an on-off valve.

Alternatively, the first PTC heater 6 may be disposed on the outer peripheral surface of the heat exchange loop passage to indirectly heat the heat exchange liquid, thereby high heat exchange efficiency and good sealing performance of the heat exchange loop passage.

Alternatively, the first PTC heater 6 may be disposed in the heat exchange loop passage to directly heat the heat exchange liquid, thereby making the heat exchange efficiency higher.

It can be understood that the first PTC heater 6 does not have a passage for the heat exchange liquid to flow by itself, but the first PTC heater 6 may be disposed on the outer peripheral surface of the heat exchange loop passage to indirectly heat the heat exchange liquid, or The first PTC heater 6 may be disposed in the heat exchange loop passage to directly heat the heat exchange liquid, where the first valve port A1 of the first control valve 7 communicates with the outlet of the first PTC heater 6, and the second control valve The third valve port B3 of 8 is in communication with the inlet of the first PTC heater 6" means the outlet of the portion of the heat exchange loop passage where the first PTC heater 6 is provided and the first valve of the first control valve 7. The port A1 is in communication, and the inlet of the portion of the heat exchange loop passage where the first PTC heater 6 is provided communicates with the third valve port B3 of the second control valve 8.

When the first PTC heater 6 can be disposed in the heat exchange loop passage to directly heat the heat exchange liquid, the heat exchange liquid is an insulating medium.

In the embodiment shown in Figures 1 and 10, the second valve port B2 of the second control valve 8, the third valve port A3 of the first control valve 7, and the total water inlet 21 can pass through the second three-way valve. The communication of 92, the outlet of the warm air passage 51, the second valve port B2 of the second control valve 8, and the total water inlet 21 may be communicated through the third three-way valve 93. Thereby, the connection is convenient, and the arrangement of the heat exchange channel is easy.

Further, as shown in FIG. 10, in some embodiments of the present creation, the refrigeration system 4 may further include a third heat exchange passage 44 connected in series between the compressor 42 and the condenser 43, The third heat exchange passage 44 and the warm air duct 51 exchange heat with each other. Thus, when the refrigeration system 4 is turned on, the refrigerant in the third heat exchange passage 44 exchanges heat with the heat exchange liquid in the warm air duct 51, whereby the refrigerant is at the third heat exchange passage 44 and the first heat exchange passage. At 411, heat exchange can be performed with the heat exchange liquid, the cooling rate of the heat exchange liquid is fast, and the cooling efficiency of the battery pack 1000 is higher.

In some embodiments, the warm air system 5 may further include a second PTC heater that selectively heats the heat exchange liquid in the warm air passage 51, that is, the warm air system 5 is separately provided with one The second PTC heater heats the heat exchange liquid in the warm air passage 51. The heating system 5 has high heating efficiency, and the temperature in the cab is rapidly increased, and the heating power of the first PTC heater can be reduced.

The first to fifth modes of operation of the battery thermal management system 10000 according to the present creative embodiment will be described in detail below with reference to FIGS. 1 and 10:

1), the first mode of operation: in this mode, the first PTC heater 6 only heats the battery pack 1000

Specifically, when the temperature of the battery pack 1000 is too low, the first PTC heater 6 is energized, the refrigeration system 4 is not operating, the warm air system 5 is not operating, the water pump 2006 is activated, and the first valve port B1 of the second control valve 8 is The third valve port B3 of the second control valve 8 is in communication, the first valve port B1 of the second control valve 8 is disconnected from the second valve port B2 of the second control valve 8, and the first valve port A1 of the first control valve 7 is In communication with the third port A3 of the first control valve 7, the first port A1 of the first control valve 7 is disconnected from the second port A2 of the first control valve 7.

The flow path of the heat exchange liquid is: the total water outlet 22, the second heat exchange passage 412, the water pump 2006, the first valve port B1 of the second control valve 8, the third valve port B3 of the second control valve 8, and the first PTC The heater 6, the first valve port A1 of the first control valve 7, the third valve port A3 of the first control valve 7, the total water inlet 21, and the battery pack 1000 are heat exchanged, and then flow out from the total water outlet 22, and reciprocate back. The circle is used to heat the battery pack 1000.

2), the second working mode: in this mode, the first PTC heater 6 simultaneously heats the battery pack 1000 and the heating system 5

Specifically, when the temperature of the battery pack 1000 is too low, the first PTC heater 6 is energized, the refrigeration system 4 is not operating, the warm air system 5 is operated, the water pump 2006 is activated, and the first valve port B1 of the second control valve 8 is The third valve port B3 of the second control valve 8 is in communication, the first valve port B1 of the second control valve 8 is disconnected from the second valve port B2 of the second control valve 8, and the first valve port A1 of the first control valve 7 is The third valve port A3 of the first control valve 7 is connected and the flow rate is adjustable. The first valve port A1 of the first control valve 7 communicates with the second valve port A2 of the first control valve 7 and the flow rate is adjustable.

The flow path of the heat exchange liquid is: sequentially flowing through the total water outlet 22, the second heat exchange passage 412, the water pump 2006, the first valve port B1 of the second control valve 8, the third valve port B3 of the second control valve 8, After the first PTC heater 6, it is divided into two paths from the outlet of the first PTC heater 6, one via the first valve port A1 of the first control valve 7, the third valve port A3 of the first control valve 7, and the total advance After the water port 21 is in heat exchange with the battery pack 1000, it flows out from the total water outlet 22, reciprocates and loops to realize heating of the battery pack 1000, and the other path passes through the first valve port A1 of the first control valve 7 and the first control valve 7 The second valve port A2, the warm air passage 51, and the air heat exchange in the warm air passage 51 realize heating of the cab, pass through the total water inlet 21, enter the battery pack 1000, and flow out from the total water outlet 22, and reciprocate back. ring.

The liquid heated by the first PTC heater 6 passes through the first control valve 7, by controlling the flow rate at which the first valve port A1 of the first control valve 7 communicates with the third port A3 of the first control valve 7, and is controlled The flow rate at which the first valve port A1 of the first control valve 7 communicates with the second valve port A2 of the first control valve 7 distributes the flow rate of the heat exchange liquid flowing into the warm air passage 5 and directly entering the total water inlet 21, that is, The heat for the heating system 5 and the heat for heating the battery pack 1000 are distributed.

Initially, the flow rate of the heat exchange liquid passing through the third port A3 of the first control valve 7 is smaller than the flow rate of the heat exchange liquid passing through the second port A2 of the first control valve 7, and is preferentially distributed to the heater system at a predetermined ratio. 5 more heat, priority to meet the heating requirements in the cab.

When the temperature in the cab is raised, it is only necessary to ensure that the temperature balance of the cab can be maintained. At this time, the flow rate of the heat exchange liquid passing through the third port A3 of the first control valve 7 is greater than that passing through the first control valve 7. The flow rate of the heat exchange liquid of the second port A2.

After the operating temperature of the battery pack 1000 rises, when the temperature of the battery pack 1000 is higher than the temperature of the heat exchange liquid, at this time, the first valve port A1 of the first control valve 7 and the third valve of the first control valve 7 The valve port A3 is disconnected, the first valve port A1 of the first control valve 7 is in communication with the second valve port A2 of the first control valve 7, and the flow rate is the largest at the communication, so that the heat of the heat exchange liquid can be heated by the heat of the battery pack 1000. A PTC heater 6 can reduce the heating power, maintain the temperature of the supply cab, and achieve the purpose of rational utilization of the vehicle energy.

3), the third working mode: in this mode, the refrigeration system 4 only cools the battery pack 1000

When the temperature of the battery pack 1000 is too high, the first PTC heater 6 is powered off, the refrigeration system 4 is operated, the warm air system 5 is not working, the water pump 2006 is started, and the first valve port B1 and the second control of the second control valve 8 are The third port B3 of the valve 8 is opened, and the first port B1 of the second control valve 8 is in communication with the second port B2 of the second control valve 8.

In the embodiment as shown in FIG. 1, the heat exchange liquid sequentially flows through the total water outlet 22 and the second heat exchange passage 412, and the heat exchange liquid is at the second heat exchange passage 412 and the first heat exchange passage 411. The heat exchange of the refrigerant, the cooled heat exchange liquid enters the battery pack 1000 via the water pump 2006, the first valve port B1 of the second control valve 8, the second valve port B2 of the second control valve 8, and the total water inlet 21, and the battery After the group 1000 is heat exchanged, it flows out from the total water outlet 22 and reciprocates the loop to achieve cooling of the battery pack 1000.

In the embodiment shown in FIG. 10, the refrigeration system 4 may further include a third heat exchange passage 44. When the temperature of the battery pack 1000 is too high, the first PTC heater 6 is powered off, and the refrigeration system 4 is operated, which is warm. The wind system 5 does not work, the water pump 2006 starts, the first valve port B1 of the second control valve 8 communicates with the third valve port B3 of the second control valve 8, and the first valve port B1 and the second control of the second control valve 8 The second valve port B2 of the valve 8 is opened, the first valve port A1 of the first control valve 7 is disconnected from the third valve port A3 of the first control valve 7, and the first valve port A1 of the first control valve 7 is The second valve port A2 of a control valve 7 is in communication.

In this embodiment, the heat exchange liquid flows through the total water outlet 22, the second heat exchange passage 412, and the heat exchange liquid at the second heat exchange passage 412 to exchange heat with the refrigerant in the first heat exchange passage 411. The cooled heat exchange liquid passes through the water pump 2006, the first valve port B1 of the second control valve 8, the third valve port B3 of the second control valve 8, the first valve port A1 of the first control valve 7, and the first control valve The second valve port A2 of 7 enters the warm air passage 51, and the heat exchange liquid exchanges heat in the third heat exchange passage 44 in the warm air passage, and the cooled heat exchange liquid enters the battery pack 1000 via the total water inlet 21, After heat exchange with the battery pack 1000, it flows out from the total water outlet 22, reciprocatingly loops, and cooling the battery pack 1000.

In short, the cooling of the battery pack 1000 can select a suitable flow path of the heat exchange liquid according to the actual cooling needs, and the heat management system 1000 has a wider application range.

4), the fourth working mode: in this mode, the refrigeration system 4 cools the battery pack 1000 and cools the cab

In this mode, the refrigeration system 4 simultaneously cools the battery pack 1000 and the cooling cab, and the flow path of the heat exchange liquid when the refrigeration system 1000 cools the battery pack 1000 is the same as the flow path of the heat exchange liquid when the refrigeration system 4 cools only the battery pack 1000.

5), the fifth working mode: the internal loop of the battery pack 1000 in this mode

When the battery pack 1000 does not need to be cooled and does not need to be heated, if the temperature difference between the battery modules 31 exceeds the set value, the water pump 2006 can be separately activated to perform the heat exchange liquid circulation inside the battery pack 1000, thereby The temperature difference between the battery modules 31 is reduced.

At this time, the first PTC heater 6 is powered off, the refrigeration system 4 is not working, the warm air system 5 is not working, the water pump 2006 is activated, the first valve port B1 of the second control valve 8 and the third valve of the second control valve 8 are activated. The port B3 is opened, and the first port B1 of the second control valve 8 is in communication with the second port B2 of the second control valve 8.

The flow paths of the heat exchange liquid are: total water outlet 22, second heat exchange passage 412, water pump 2006, first valve port B1 of second control valve 8, second valve port B2 of second control valve 8, and total water inlet 21. After heat exchange with each of the battery modules 31 of the battery pack 1000, the water is discharged from the total water outlet 22 and reciprocated to balance the temperature difference between the battery modules 31 to make the temperature of the battery pack 1000 more uniform.

In short, according to the battery thermal management system 10000 of the present embodiment, the battery pack 1000 is temperature-controlled according to different external environments, so that the battery pack 1000 is always at a suitable temperature, and the energy of the refrigeration system 4 is utilized as a battery pack. 1000 refrigeration, using the first PTC heater of the battery pack 1000 to heat the heating system 5, the structure is simple and the vehicle energy distribution is reasonable.

The electric vehicle 100000 according to the present invention will be briefly described below with reference to FIGS. 1 and 10, as shown in FIGS. 1 and 10, the electric vehicle 100000 according to the present creative embodiment includes the above-described battery thermal management system 10000 and battery manager. 3000.

The battery manager 3000 is used to collect information of the battery pack 1000, such as voltage information, current information, and temperature information, to monitor the battery pack 1000.

The battery manager 3000 is connected to both the refrigeration system 4 of the battery thermal management system 10000 and the first PTC heater 6 to manage the battery pack 1000. Alternatively, the battery manager 3000 can perform CAN communication with the refrigeration system 4 and the first PTC heater 6, and the battery manager 3000 can also control the on and off of the high voltage contactor.

In the case that the electric vehicle 100000 is working normally, the battery manager 3000 collects relevant information of the battery pack 1000, including information such as temperature, voltage, current of the battery pack 1000, and monitors the battery pack 1000.

When the average temperature T of the battery pack 1000 detected by the battery manager 3000 reaches the high temperature alarm temperature value, the refrigeration system 4 starts to operate, and the thermal management system 1000 enters the third operation mode or the fourth operation mode.

When the battery manager 3000 detects that the average temperature T of the battery pack 1000 reaches the low temperature alarm temperature value, the first PTC heater 6 is energized, and the thermal management system 1000 enters the first mode of operation or the second mode of operation.

According to the electric vehicle 10000 of the present embodiment, the temperature of the battery pack 1000 is monitored by the battery manager 3000, the opening and closing of the refrigeration system 4 and the first PTC heater 6 are instantly controlled, and the refrigeration system 4 and the first PTC heater are adjusted. The power of 6 achieves thermal management of the battery pack 1000, so that the battery pack 1000 is always at a suitable temperature. The electric vehicle 10000 according to the present embodiment has a simple structure and is adapted to different environments and climates, and the thermal management effect of the battery pack 1000 is good.

In the description of this creation, it is to be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", " The orientation or positional relationship of the indications "inside", "outside", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the creation. The description and the simplification of the present invention are not intended to be a limitation of the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In the description of the present work, the meaning of "plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In this creation, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless expressly stated otherwise. Or in one piece; it may be mechanically connected, or it may be electrically connected or communicated with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication of two elements or interaction of two elements unless otherwise There are clear limits. For those skilled in the art, the specific meanings of the above terms in the present creation can be understood on a case-by-case basis.

In the present application, the first feature "on" or "below" the second feature may be the direct contact of the first and second features, or the first and second features are indirectly through the intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material, or feature is included in at least one embodiment or example of the present invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any or a plurality of embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described above, it is to be understood that the above-described embodiments are illustrative and are not to be construed as limiting the present invention, and those skilled in the art may The embodiments are subject to variations, modifications, substitutions and variations.

A1, B1‧‧‧ first valve port

A2, B2‧‧‧ second valve port

A3, B3‧‧‧ third valve port

1‧‧‧ cabinet

3‧‧‧Battery

4‧‧‧Refrigeration system

5‧‧‧Warm air system

6‧‧‧First PTC heater

7‧‧‧First control valve

8‧‧‧Second control valve

21‧‧‧ total water inlet

22‧‧‧ total outlet

31‧‧‧ battery module

32‧‧‧ heat exchange tube

33‧‧‧Total water inlet

34‧‧‧ total outlet pipe

35‧‧‧Inlet connection pipe

36‧‧‧Water connection pipe

37‧‧‧Adapter

38‧‧‧Knock ring

41‧‧‧heat exchanger

42‧‧‧Compressor

43‧‧‧Condenser

44‧‧‧ third heat exchange channel

51‧‧‧Warm air passage

91‧‧‧ first three-way valve

92‧‧‧ second three-way valve

93‧‧‧Third three-way valve

311‧‧‧ batteries

312‧‧‧ Heat Exchanger

313‧‧‧ Thermal pad

411‧‧‧First heat exchange channel

412‧‧‧Second heat exchange channel

1000‧‧‧Battery Pack

2006‧‧‧Water pump

2007‧‧‧Water tank

3000‧‧‧Battery Manager

3121‧‧‧Inlet interface

3122‧‧‧ liquid interface

10000‧‧‧ Thermal Management System

100000‧‧‧Electric car

1 is a schematic diagram of an embodiment of a battery thermal management system according to the present invention; FIG. 2 is a schematic structural view of a battery module according to the present embodiment; FIG. 3 is a battery module according to the present creative embodiment. FIG. 4 is a schematic structural view of a second perspective of the interior of the battery module according to the present embodiment; FIG. 5 is a third diagram of the interior of the battery module according to the present embodiment. FIG. 6 is a flow chart of a heat exchange medium of a battery pack according to the present embodiment; FIG. 7 is a schematic structural view of a first view of the battery pack according to the present embodiment; FIG. A schematic diagram of a second perspective view of a battery pack according to the present creative embodiment; FIG. 9 is a schematic structural view of a third perspective of the battery pack according to the present embodiment; FIG. 10 is another diagram of the battery thermal management system according to the present creation 1 is a schematic structural view of a first view of a battery pack according to another embodiment of the present creation; FIG. 12 is a second view of a battery pack according to another embodiment of the present creation; FIG. 13 is a schematic structural view of a first perspective of the interior of the battery module according to the present embodiment; FIG. 14 is a schematic structural view of a second perspective of the interior of the battery module according to the present embodiment. 15 to 17 are schematic views of still another embodiment of the battery thermal management system according to the present invention.

Claims (22)

A battery pack, comprising: a box; a plurality of battery modules, the plurality of battery modules are disposed in the box, the plurality of battery modules are divided into a plurality of rows of battery modules, and each of the battery modules is disposed a heat exchange member; a plurality of heat exchange tube members, each of the battery modules corresponding to at least one of the heat exchange tube members, each of the heat exchange tube members comprising a plurality of independent heat exchange tubes and two branch tubes, each of the heat exchange tube members One of the heat exchange tubes is connected between the heat exchange members of the adjacent two battery modules in the corresponding row of battery modules, and the branch tubes of each of the heat exchange tube members are connected at the end of each of the battery modules. An inlet or an outlet of the heat exchange member of the battery module; a total inlet pipe and a total outlet pipe, wherein the total inlet pipe and the total outlet pipe are respectively connected to the two branch pipes of each of the heat exchange tube members. The battery pack according to claim 1, wherein each of the heat exchange members is provided with an interface for communicating with the heat exchange tube on the corresponding battery module. The battery pack according to claim 1, wherein the heat exchange tube is a bellows. The battery pack of claim 1, wherein the upper surface of the battery module is provided with a limiting member for limiting the degree of freedom of the heat exchange tube. The battery pack of claim 4, wherein the limiting member is a snap ring, and the heat exchange tube is snapped into the snap ring. The battery pack of claim 1, wherein the heat exchange liquid in the plurality of heat exchange tubes is flowed in the same direction, the total inlet pipe is located at one side of the plurality of battery modules, and the total outlet pipe is located at the plurality of batteries The opposite side of the module. The battery pack of claim 1, wherein each row of battery modules corresponds to two heat exchange tube assemblies, and the flow direction of the heat exchange tube assemblies alternates. The battery pack of claim 1, wherein the total inlet pipe and the total outlet pipe are disposed on opposite sides of the plurality of battery modules. The battery pack according to claim 8, wherein the branch pipe is L-shaped to fit the side surface and the upper surface of the battery module. The battery pack according to claim 1, wherein at least one section of the total inlet pipe and the total outlet pipe is rectangular. The battery pack according to claim 1, wherein each of the heat exchange tubes is provided with a joint at both ends thereof. The battery pack according to any one of claims 1 to 11, wherein each of the battery modules comprises a battery core group, and the heat exchange member is a heat exchange plate, the heat exchange plate Set on one side of the battery pack. The battery pack of claim 12, wherein a heat conducting pad is interposed between the heat exchange plate and the battery core group. A battery thermal management system, comprising: the battery pack according to any one of claims 1 to 13; a heat exchange loop pipe, the two ends of the heat exchange loop pipe respectively Connected to the total inlet pipe and the total outlet pipe; a refrigeration system and a heating system, the refrigeration system comprising a compressor, a condenser and a heat exchanger, the heat exchanger comprising a first heat exchange with each other a heat exchange passage and a second heat exchange passage, the first heat exchange passage being connected in series between the compressor and the condenser, wherein the second heat exchange passage is a part of the heat exchange loop pipe, and the heating system is used for the heating system Heating the air, the warm air system includes a warm air duct, the warm air duct selectively communicating with the heat exchange loop passage; a first PTC heater for selectively heating The heat exchange liquid in the heat exchange loop channel. The battery thermal management system of claim 14, wherein the refrigeration system further comprises a third heat exchange passage connected in series between the compressor and the condenser, the third The heat exchange passage and the warm air duct exchange heat with each other. The battery thermal management system of claim 14, further comprising a first control valve, the warm air duct and the heat exchange loop passage being selectively connectable through the first control valve. The battery thermal management system of claim 16, wherein the first control valve regulates a flow rate of the heat exchange liquid flowing from the heat exchange loop passage into the total inlet pipe, and adjusts the heat exchange loop The flow rate of the heat exchange liquid flowing into the warm air passage. The battery thermal management system of claim 17, wherein the first control valve comprises a first valve port, a second valve port and a third valve port, the first valve of the first control valve The port is in communication with the outlet of the first PTC heater, the second valve port of the first control valve is in communication with the warm air duct, and the third valve port of the first control valve is in communication with the main inlet pipe, the first control The first valve port of the valve is in communication with the second valve port of the first control valve and the flow rate is adjustable, and the first valve port of the first control valve is in communication with the third valve port of the first control valve and the flow rate is adjustable. The battery thermal management system of claim 18, further comprising a second control valve, the total outlet pipe selectively connecting the inlet of the first PTC heater and the second control valve One of the total inlet pipes. The battery thermal management system of claim 19, wherein the second control valve comprises a first valve port, a second valve port and a third valve port, the first valve of the second control valve a port is connected to the total outlet pipe, a second valve port of the second control valve is in communication with the total inlet pipe, and a third valve port of the second control valve is in communication with the first PTC heater, the second control valve The first valve port is selectively connectable to the second valve port of the second control valve or the third valve port of the second control valve. The battery thermal management system of claim 14, wherein the warm air system further comprises a second PTC heater, the second PTC heater selectively heating the heat exchange liquid in the warm air duct . A vehicle characterized by comprising a battery thermal management system according to any one of claims 14 to 21.