CN219626744U - Battery cooling device and system for power-changing heavy truck - Google Patents

Abstract

The utility model discloses a battery cooling device and a system for a heavy truck of power exchange, wherein the cooling device comprises an expansion water tank, a cooling unit, a cold machine water inlet pipe, a cooling water inlet main pipe and a cooling water outlet main pipe, the cooling unit comprises a water pump and a control switch, and a heat flow check plate is further arranged at the air outlet side of the cooling unit and used for preventing high-pressure fault alarm of the cooling unit caused by hot air backflow; the first end of the cooling water outlet main pipe is connected to the water outlet of the cooling unit, the second end of the cooling water outlet main pipe is connected to the water inlet of one or more external batteries, the first end of the cooling water inlet main pipe is connected to the water outlet of one or more batteries so as to recycle the liquid cooled by the external batteries, the second end of the cooling water inlet main pipe is respectively connected to the water outlet of the expansion water tank and the water inlet of the water inlet pipe of the cooling machine, and the water outlet of the water inlet pipe of the cooling machine is connected to the water inlet of the cooling unit. The utility model improves the cooling efficiency and reduces the high-voltage fault alarm of the cooling unit.

Description

Battery cooling device and system for power-changing heavy truck

Technical Field

The utility model belongs to the technical field of thermal management, and particularly relates to a battery cooling device and system for a power conversion heavy truck.

Background

Along with the continuous breakthrough of battery technology and the reduction of battery cost, the pure electric heavy truck has taken up an important market place in the field of new energy heavy trucks. The endurance mileage of the pure electric heavy truck and the service life of the battery become important technical indexes of market competitiveness. How to control the consistency of the charge and discharge temperatures of all the battery cells in the battery pack is a necessary condition for realizing the complete charge and discharge of the battery, and the discharge can be fully utilized to increase the endurance mileage to the greatest extent while prolonging the service life of the battery. However, in recent years, the problem of low cooling efficiency of a battery and high-voltage fault alarm of a cooling unit frequently occurs in the running of a pure electric heavy truck market. Therefore, it is important to design a battery cooling system with high cooling efficiency and reduced high-voltage fault alarm of a cooling unit.

Disclosure of Invention

The technical problems to be solved by the utility model are as follows: a battery cooling device and system having high cooling efficiency while reducing high-voltage failure alarms of a cooling unit is provided. In order to solve the above problems, the present utility model provides the following technical solutions.

In a first aspect of the present utility model, there is provided a battery cooling device for a heavy-duty battery replacement card, comprising: an expansion water tank, a cooling unit, a cold water inlet pipe, a cooling water inlet main pipe and a cooling water outlet main pipe, wherein,

the cooling unit comprises a water pump and a control switch, the control switch is used for controlling the water pump to start, and a heat flow check plate is further arranged on the air outlet side of the cooling unit;

the first end of the main cooling water outlet pipe is connected with a water outlet of the cooling unit, the second end of the main cooling water outlet pipe is connected with water inlets of one or more external batteries, and the external battery system is cooled by liquid flowing out from the second end of the main cooling water outlet pipe;

the first end of the main cooling water inlet pipe is connected to the water outlets of the one or more batteries so as to recycle the liquid cooled by the external batteries, the second end of the main cooling water inlet pipe is respectively connected to the water outlet of the expansion water tank and the water inlet of the water inlet pipe of the cooling machine, and the water outlet of the water inlet pipe of the cooling machine is connected to the water inlet of the cooling unit.

In one embodiment of the present utility model, the expansion tank includes an exhaust pipeline, the exhaust pipeline includes a first exhaust pipe, a second exhaust pipe, and a third exhaust pipe, a first end of the first exhaust pipe is connected to the inside of the main cooling inlet pipe, a first end of the second exhaust pipe is connected to the inside of the main cooling outlet pipe, a second end of the first exhaust pipe and a second end of the second exhaust pipe are respectively connected to a first end of the third exhaust pipe, and a second end of the third exhaust pipe is connected to an exhaust port of the expansion tank.

In one embodiment of the utility model, the vent is located at the top end of the expansion tank.

In one embodiment of the present utility model, the expansion tank further includes a water supplementing pipe, a first end of the main cooling water inlet pipe is connected to the water outlet of the external first battery, so as to recycle the liquid cooled by the external battery, a second end of the main cooling water inlet pipe is connected to the first end of the water supplementing pipe and the water inlet of the water inlet pipe of the chiller, respectively, and a second end of the water supplementing pipe is connected to the water outlet of the expansion tank.

In one embodiment of the present utility model, when the external battery is one, a first end of the main cooling water outlet pipe is connected to the water outlet of the cooling unit, a second end of the main cooling water outlet pipe is connected to the water inlet of the external battery, and the liquid flowing out through the second end of the main cooling water outlet pipe cools the external battery system; the first end of the main cooling water inlet pipe is connected to the water outlet of the external battery so as to recycle the liquid cooled by the external battery, the second end of the main cooling water inlet pipe is respectively connected to the water outlet of the expansion water tank and the water inlet of the water inlet pipe of the cooling machine, and the water outlet of the water inlet pipe of the cooling machine is connected to the water inlet of the cooling unit.

In one embodiment of the present utility model, when the external batteries are plural, the water inlet three-way pipe, the third battery water outlet branch, the fourth battery water outlet branch, the water outlet three-way pipe, the first battery water inlet branch, the second battery water inlet branch, the third battery water inlet branch and the fourth battery water inlet branch are further included, wherein,

the water outlet three-way pipe is respectively connected with the second end of the cooling water outlet main pipe, the first end of the first battery water inlet branch and the first end of the second battery water inlet branch; the second end of the first battery water inlet branch is connected with the first end of the fourth battery water inlet branch, and the second end of the fourth battery water inlet branch is connected with the fourth battery water outlet branch; the second end of the second battery water inlet branch is connected with the first end of the third battery water inlet branch, the second end of the third battery water inlet branch is connected with the third battery water outlet branch, and the third battery water outlet branch and the fourth battery water outlet branch are connected with the first end of the cooling water inlet main pipeline through the water inlet three-way pipe so as to realize the circulation cooling of the plurality of external batteries.

In one embodiment of the utility model, all liquid conduits are connected in the form of quick connectors.

In one embodiment of the utility model, all liquid conduits are wrapped around insulating wool.

In one embodiment of the utility model, the heat flow check plate further comprises a left check plate, a top check plate and a right check plate, wherein the left check plate is positioned on a first side of an air outlet of the cooling unit, the top check plate is positioned on the top of the air outlet of the cooling unit, and the right check plate is positioned on a second side of the air outlet of the cooling unit.

In a second aspect of the utility model, a battery cooling system for a heavy-duty battery replacement card comprises the battery cooling device for the heavy-duty battery replacement card, a battery replacement box frame and one or more power batteries, wherein,

the battery box frame comprises a plurality of storage layers from bottom to top, the cooling unit is arranged on the left side of a top equipment layer on the first side of the battery box frame, an air inlet of the cooling unit is on the same side as the first side of the battery box frame, and a water inlet and a water outlet of the cooling unit are arranged at positions close to the inner side of the battery box frame, wherein the first side of the battery box frame is one side of the battery box frame close to an external vehicle cab;

the top of the heat flow check plate is also provided with a notch, and the notch is arranged below a top cross beam of the battery box frame above the heat flow check plate;

the expansion water tank is arranged at one side of the top equipment layer, which is close to the water inlet and the water outlet of the cooling unit, so that a liquid supplementing path can be shortened, and meanwhile, the upper surface of a liquid adding port of the expansion water tank is lower than the upper surface of the battery box frame;

the battery cooling device for the battery replacement heavy truck is used for radiating one or more power batteries, and the one or more power batteries are distributed on a battery replacement box frame below the cooling unit.

The utility model has the following beneficial technical effects:

1. according to the battery cooling device and the system for the power-changing heavy truck, provided by the utility model, the air flow at the air outlet is blocked by designing the heat flow check plate, so that the amount of air flowing back to the air inlet is reduced, the air temperature at the air inlet of the cooling unit is controlled, the air flow temperature at the air inlet is consistent with the temperature of the refrigerant in the condenser, and the influence of high-pressure fault alarm of the cooling unit caused by higher air flow temperature at the air inlet after the air flows back is reduced.

2. The battery cooling device and the system for the power-changing heavy truck provided by the utility model have the advantages that the control switch is designed for the cooling unit, the reasonable design of the exhaust pipeline is combined, the complete exhaust of the pipeline can be realized by freely filling the gravity when cooling liquid is filled, all liquid pipelines are in the form of quick connectors, the on-site assembly efficiency is improved, meanwhile, the leakage point of the cooling liquid is reduced, the after-sales maintenance and replacement of the water pipe are facilitated, the heat insulation cotton is wound on the outer sides of all pipelines, the heat exchange with the environment is reduced, the cold energy loss is reduced, the cooling efficiency is improved, the battery cooling system can be suitable for a battery cooling system of a heavy truck power-changing scene, and the independent cooling of the battery in the power-changing box can be realized under three working conditions of heavy truck operation, non-power-changing charging and station power-changing charging, so that the cooling efficiency of the battery is ensured, and the battery performance and the service life are better.

3. According to the battery cooling system for the battery replacement heavy truck, provided by the utility model, the air inlet of the cooling unit is adjacent to the vehicle cab by designing the cooling unit and the expansion water tank at the position of the battery replacement box frame, and the air outlet of the cooling unit is opposite to the vehicle running direction, so that the air inlet and the air outlet of the cooling unit are facilitated, the cooling efficiency is further improved, meanwhile, the short fluid supplementing path is effectively shortened, and the filling efficiency is improved.

The present utility model will be described in further detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of a battery cooling device for a heavy truck for power exchange according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an exhaust pipeline of the battery cooling device for a heavy truck in FIG. 1;

FIG. 3 is a schematic view of an installation of a thermal flow check plate according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of a quick water pipe;

fig. 5 is a schematic structural diagram of a battery cooling system for a heavy truck for power exchange according to an embodiment of the present utility model.

Reference numerals illustrate:

the device comprises a 1-expansion water tank, a 100-water supplementing pipe, a 101-exhaust pipeline, a 1011-first exhaust pipe, a 1012-second exhaust pipe, a 1013-third exhaust pipe, a 2-cooling unit, a 201-heat flow check plate, a 2011-left check plate, a 2012-top check plate, a 2013-right check plate, a 3-cold machine water inlet pipe, a 4-cooling water inlet main pipe, a 5-cooling water outlet main pipe, a 6-water inlet three-way pipe, a 61-third battery water outlet branch, a 62-fourth battery water outlet branch, a 7-water outlet three-way pipe, a 71-first battery water inlet branch, a 72-second battery water inlet branch, a 8-third battery water inlet branch, a 81-first quick plug, a 82-first hard pipe, a 83-hose, a 84-second hard pipe, a 85-second quick plug, a 9-fourth battery water inlet branch, a 10-connection three-way, a 11-battery box frame and a 13-power battery.

Detailed Description

The present utility model will be described in further detail with reference to specific examples, but embodiments of the present utility model are not limited thereto.

In the description of the present utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "transverse," "inner," "outer," and the like refer to an azimuth or positional relationship based on that shown in the drawings, or that is commonly put in place when the product of this application is used, merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, a description of the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In the present utility model, the schematic representations of the above terms are not necessarily for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art may combine and combine the different embodiments or examples described in this disclosure.

Although the utility model is described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed utility model, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Example 1

Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery cooling device for a heavy-duty battery replacement according to an embodiment of the present utility model, where the battery cooling device for a heavy-duty battery replacement includes: expansion tank 1, cooling unit 2, cold machine inlet tube 3, cooling inlet main pipe 4 and cooling outlet main pipe 5.

Specifically, as shown in fig. 2, the expansion tank 1 includes an exhaust pipe 101, the exhaust pipe 101 includes a first exhaust pipe 1011, a second exhaust pipe 1012, and a third exhaust pipe 1013, a first end of the first exhaust pipe 1011 is connected to the inside of the main cooling water inlet pipe 4, a first end of the second exhaust pipe 1012 is connected to the inside of the main cooling water outlet pipe 5, a second end of the first exhaust pipe 1011 and a second end of the second exhaust pipe 1012 are connected to a first end of the third exhaust pipe 1013, respectively, and a second end of the third exhaust pipe 1013 is connected to an exhaust port of the expansion tank 1.

Preferably, the exhaust port is located at the top of the expansion tank 1.

In the present embodiment, the first exhaust pipe 1011 and the second exhaust pipe 1012 are connected to the third exhaust pipe 1013 through a connecting tee. The manner in which the first exhaust pipe 1011 and the second exhaust pipe 1012 are connected to the third exhaust pipe 1013 is not limited in the present utility model.

According to the battery cooling device for the power changing heavy truck, the first exhaust pipe 1011 and the second exhaust pipe 1012 are respectively arranged for the cooling main water inlet pipe 4 and the cooling main water outlet pipe 5, the first exhaust pipe 1011 and the second exhaust pipe 1012 are converged to the third exhaust pipe 1013 and then are connected to the exhaust port at the top of the expansion water tank 1, so that the length of a gas exhaust pipe is shortened, and the exhaust efficiency is improved.

The cooling unit 2 comprises a water pump, a control switch and a heat flow check plate 201.

Specifically, the control switch is used for controlling the water pump to start. Further, the control switch is a control switch connected in parallel in the water pump starting control circuit of the cooling unit 2 and is used for controlling the starting of the water pump, so that the water circulation of the whole system is realized, and the original control logic of the water pump starting control circuit is not influenced.

When the temperature of the battery of the traditional cooling unit reaches a certain temperature requirement, the cooling machine is started, so that the cooling machine cannot be tested in advance, and the fault detection is not facilitated. According to the battery cooling device for the power change heavy truck, the control switch is connected in parallel in the water pump starting control circuit of the cooling unit 2, the control switch is operated, so that the cooling unit is immediately started to work, the air of the main cooling water inlet pipeline 4 and the main cooling water outlet pipeline 5 in the system can be effectively discharged by combining the design of the exhaust pipeline 101, the cooling efficiency is improved, meanwhile, the manual test, forced starting, fault investigation and maintenance treatment of the cooling unit 2 can be controlled in time, the battery cooling system of the heavy truck power change scene can be adapted, and independent cooling of batteries in a power change box can be realized under three working conditions of heavy truck operation, non-power change charging and station-end power change charging, so that the cooling efficiency of the batteries is ensured, and the battery performance and the service life are better.

A heat flow check plate 201 is provided at the air outlet side of the cooling unit 2 for preventing the backflow of hot air. Further, as shown in fig. 3, the heat flow check plate 201 further includes a left check plate 2011, a top check plate 2012, and a right check plate 2013, wherein the left check plate 2011 is located at a first side of an air outlet of the cooling unit 2, the top check plate 2012 is located at a top of the air outlet of the cooling unit 2, and the right check plate 2013 is located at a second side of the air outlet of the cooling unit 2.

Optionally, a rivet nut is arranged inside the cooling unit 2 for installing a heat flow check plate 201 at an air outlet of the cooling unit 2.

Preferably, the heat flow check plate 201 is made of aluminum alloy, so that the weight of the device can be reduced while the function is realized.

According to the characteristic curve of the refrigerant, the higher the temperature of the refrigerant, the higher the pressure required for liquefying the refrigerant, thus causing a high-pressure fault alarm of the cooling unit 2. According to the battery cooling device for the power changing heavy truck, provided by the embodiment, the heat flow check plate 201 is arranged at the air outlet of the cooling unit 2, so that high-voltage fault alarm of the cooling unit 2 caused by overhigh temperature due to hot air backflow at the air outlet can be avoided.

The first end of the main cooling water outlet pipe 5 is connected to the water outlet of the cooling unit 2, the second end of the main cooling water outlet pipe 5 is connected to the water inlet of one or more external batteries, and the one or more batteries are cooled by the liquid flowing out from the second end of the main cooling water outlet pipe 5.

The first end of the main cooling water inlet pipe 4 is connected to the water outlet of one or more batteries to recycle the liquid cooled by the external batteries, and the second end of the main cooling water inlet pipe 4 is connected to the water outlet of the expansion tank 1 and the water inlet of the water inlet pipe 3 of the cooling machine respectively, and the water outlet of the water inlet pipe 3 of the cooling machine is connected to the water inlet of the cooling machine set 2.

Optionally, the expansion tank 1 further includes a water replenishing pipe 100, a first end of the main cooling water inlet pipe 4 is connected to a water outlet of one or more batteries to recycle the liquid cooled by the external batteries, a second end of the main cooling water inlet pipe 4 is connected to the first end of the water replenishing pipe 100 and a water inlet of the chiller water inlet pipe 3, respectively, and a second end of the water replenishing pipe 100 is connected to a water outlet of the expansion tank 1.

Optionally, the battery cooling device for the heavy truck of changing electricity further comprises a connecting tee joint 10, and the second end of the main cooling water inlet pipeline 4 is respectively connected to the water outlet of the expansion water tank 1 and the water inlet of the water inlet pipe 3 of the cooler through the connecting tee joint 10.

Further, when the external battery is one, the first end of the main cooling water outlet pipe 5 is connected to the water outlet of the cooling unit 2, the second end of the main cooling water outlet pipe 5 is connected to the water inlet of the external battery, and the external battery system is cooled by the liquid flowing out from the second end of the main cooling water outlet pipe 5; the first end of the main cooling water inlet pipe 4 is connected to the water outlet of the external battery so as to recycle the liquid cooled by the external battery, the second end of the main cooling water inlet pipe 4 is respectively connected to the water outlet of the expansion water tank 1 and the water inlet of the water inlet pipe 3 of the cooling machine, and the water outlet of the water inlet pipe 3 of the cooling machine is connected to the water inlet of the cooling unit 2.

Further, when the external batteries are multiple, the battery cooling device for the heavy truck for power conversion further comprises a water inlet three-way pipe 6, a third battery water outlet branch 61, a fourth battery water outlet branch 62, a water outlet three-way pipe 7, a first battery water inlet branch 71, a second battery water inlet branch 72, a third battery water inlet branch 8 and a fourth battery water inlet branch 9. The water outlet three-way pipe 7 is respectively connected with the second end of the main cooling water outlet pipe 5, the first end of the first battery water inlet branch 71 and the first end of the second battery water inlet branch 72; the second end of the first battery water inlet branch 71 is connected to the first end of the fourth battery water inlet branch 9, and the second end of the fourth battery water inlet branch 9 is connected to the fourth battery water outlet branch 62; the second end of the second battery water inlet branch 72 is connected to the first end of the third battery water inlet branch 8, the second end of the third battery water inlet branch 8 is connected to the third battery water outlet branch 61, and the third battery water outlet branch 61 and the fourth battery water outlet branch 62 are connected to the first end of the cooling water inlet main pipe 4 through the water inlet three-way pipe 6 so as to realize the circulation cooling of a plurality of external batteries.

Further, as shown in fig. 4, the third battery water inlet branch 8 includes a first quick plug 81, a first hard pipe 82, a hose 83, a second hard pipe 84 and a second quick plug 85 which are sequentially connected, and each hard pipe outlet end is sealed with the connected quick plug by interference fit and butyl sealant filling, so that the sealing performance of the cooling pipeline is improved, and the cooling efficiency is further improved.

Preferably, all liquid pipes are connected in the form of quick connectors.

Preferably, all the outside of the liquid pipeline is wrapped with heat insulation cotton, so that heat exchange with the environment is reduced, the cold energy loss is reduced, and the cooling efficiency is further improved. Specifically, all the liquid pipelines comprise a main cooling water inlet pipeline 4, a main cooling water outlet pipeline 5, a third battery water outlet branch 61, a fourth battery water outlet branch 62, a first battery water inlet branch 71, a second battery water inlet branch 72, a third battery water inlet branch 8 and a fourth battery water inlet branch 9. The quick-connect connector is adopted, so that the on-site assembly efficiency is improved, meanwhile, the leakage point of the cooling liquid is reduced, and the after-sale maintenance and replacement of the water pipe are facilitated.

The following describes the operation of the battery cooling device for a heavy battery replacement card:

the cooling liquid is added from the top liquid adding port of the expansion tank 1, and the whole cooling system is filled by two branches through the water supplementing pipe 100 via the connecting tee joint 10.

One branch enters the internal pipeline of the cooling unit 2 through the cooler water inlet pipe 3, the cooling liquid flows out from the water outlet of the cooling unit 2, and after passing through the cooling water outlet main pipeline 5, the branch enters the first and second internal cold water pipelines of the first and second batteries through the first end of the first battery water inlet branch 71 and the second battery water inlet branch 72 in two ways. Specifically, the first path enters the cold water pipeline inside the first battery through the first end of the first battery water inlet branch 71, then enters the fourth battery through the fourth battery water inlet branch 9, and then flows out and circulates through the fourth battery water outlet branch 62 to enter the main cooling water inlet pipeline 4; the second battery water inlet branch 72 is used for cooling the second battery, the third battery is cooled through the third battery water inlet branch 8, and then flows out and circulates into the cooling water inlet main pipeline 4 through the third battery water outlet branch 61.

The other branch, after passing through the water supplementing pipe 100, passes through the cooling water inlet main pipe 4 and the water inlet three-way pipe 6, and then respectively enters the cold water pipes inside the third battery and the fourth battery through the third battery water outlet branch 61 and the fourth battery water outlet branch 62.

Finally, the two branches enter the cooling water inlet main pipeline 4 through the third battery water outlet branch 61 and the fourth battery water outlet branch 62, and then enter the cooling unit 2 through the cooler water inlet pipe 3 to form circulation cooling. In addition, the water outlet temperature of the cooling unit 2 is lower than the water inlet temperature according to the communication requirement of the battery control box.

The battery cooling unit 2 for the heavy truck of changing electricity of traditional structure is not started in the liquid feeding process, and gas in the whole system pipeline can only escape from liquid and slowly enter the exhaust pipeline through the gas in the whole pipeline, and gas in the whole pipeline can not thoroughly be discharged before the vehicle operates, so that the water flow resistance of the cooling system is increased, the cooling efficiency is reduced, in addition, in the subsequent vehicle operation, when the gas is completely discharged, the cooling liquid needs to be added to reach the designated liquid level, the filling port of the cooling liquid is positioned at the top of the whole power changing frame, the operation difficulty is high, and certain potential safety hazards exist. The battery cooling device for the battery replacement heavy truck provided by the embodiment can thoroughly empty the gas in the pipeline by utilizing a self-circulation mode by means of the water pump in the cooling liquid adding and filling process by arranging the control switch on the cooling unit, and meanwhile, cooling liquid supplementing is completed, and the water pump of the chiller can be debugged before the running of the vehicle by the debugging switch.

Example two

Referring to fig. 5, fig. 5 is a schematic structural diagram of a battery cooling system for a heavy-duty battery replacement according to an embodiment of the present utility model, where the battery cooling system for a heavy-duty battery replacement includes the above-mentioned battery cooling device for a heavy-duty battery replacement, a battery replacement box frame 11, and one or more power batteries 13.

Specifically, the battery box frame 11 includes a plurality of storage layers from bottom to top, the cooling unit 2 is disposed on the left side of the top equipment layer on the first side of the battery box frame 11, and the air inlet of the cooling unit 2 is on the same side as the first side of the battery box frame 11, and the water inlet and the water outlet of the cooling unit 2 are disposed at positions close to the inner side of the battery box frame 11. The first side of the battery box frame 11 is a side of the battery box frame 11 close to the outside vehicle cab.

The battery cooling system for heavy truck trades that this embodiment provided, arrange in the left side of the top equipment layer of trading electric box frame 11 first side through cooling unit 2, and this cooling unit 2's air intake and this trading electric box frame 11 first side homonymy, make cooling unit 2's air intake and vehicle cab adjacent, cooling unit 2's air outlet is reverse with the vehicle direction of travel, be favorable to cooling unit 2's air inlet and air-out, and then improve cooling efficiency, this cooling unit 2's water inlet and delivery port set up in the position that is close to trading electric box frame 11 inboard, effectively shorten the total length of cooling outlet trunk line 5, cooling inlet trunk line 4, twine the heat preservation heat insulation cotton in all pipeline outsides simultaneously, reduce the heat exchange with the environment, reduce the cold loss.

Further, the top of the heat flow check plate 201 is provided with a notch, the notch is arranged below the top beam of the converter box frame 11 above the heat flow check plate 201, the notch can avoid the top beam of the converter box frame 11 above the heat flow check plate 201, the distance between the upper end surface of the heat flow check plate 201 and the top plate of the converter box frame 11 is shortened, the backflow air can be reduced, and the heat flow check effect is ensured.

The expansion water tank 1 is arranged at one side of the top equipment layer, which is close to the water inlet and the water outlet of the cooling unit 2, so that a liquid supplementing path can be shortened, and the filling efficiency can be improved; meanwhile, the upper surface of the liquid adding port of the expansion tank 1 is lower than the upper surface of the battery box frame 11, and the installation of various lifting appliances of the battery box can be matched in a larger range.

One or more power cells 13 are distributed on the battery box frame 11 below the cooling unit 2 from top to bottom.

Optionally, the battery cooling system for the battery replacement heavy truck further comprises a battery control box, wherein the battery control box is used for battery system data acquisition, data communication, data display, state estimation, thermal management, safety management, energy management and fault diagnosis.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (10)

1. A battery cooling device for a heavy battery replacement card, comprising: an expansion water tank (1), a cooling unit (2), a cold water inlet pipe (3), a main cooling water inlet pipe (4) and a main cooling water outlet pipe (5), wherein,

the cooling unit (2) comprises a water pump and a control switch, the control switch is used for controlling the water pump to start, and a heat flow check plate (201) is further arranged on the air outlet side of the cooling unit (2);

the first end of the main cooling water outlet pipe (5) is connected with a water outlet of the cooling unit (2), and the second end of the main cooling water outlet pipe (5) is connected with a water inlet of one or more external batteries to cool the one or more batteries;

the first end of the cooling main water inlet pipe (4) is connected to the water outlets of the one or more batteries so as to recycle the liquid cooled by the external batteries, the second end of the cooling main water inlet pipe (4) is respectively connected to the water outlet of the expansion water tank (1) and the water inlet of the cooling main water inlet pipe (3), and the water outlet of the cooling main water inlet pipe (3) is connected to the water inlet of the cooling unit (2).

2. The battery cooling device for the power changing heavy truck according to claim 1, wherein the expansion water tank (1) comprises an exhaust pipeline (101), the exhaust pipeline (101) comprises a first exhaust pipe (1011), a second exhaust pipe (1012) and a third exhaust pipe (1013), a first end of the first exhaust pipe (1011) is connected into the cooling water inlet main pipe (4), a first end of the second exhaust pipe (1012) is connected into the cooling water outlet main pipe (5), a second end of the first exhaust pipe (1011) and a second end of the second exhaust pipe (1012) are respectively connected into a first end of the third exhaust pipe (1013), and a second end of the third exhaust pipe (1013) is connected into an exhaust port of the expansion water tank (1).

3. The battery cooling device for a heavy truck according to claim 2, characterized in that the exhaust port is located at the top end of the expansion tank (1).

4. Battery cooling device for heavy truck according to claim 1, characterized in that the expansion tank (1) further comprises a water replenishment pipe (100), a first end of the main cooling water inlet pipe (4) is connected to the water outlet of the one or more batteries, a second end of the main cooling water inlet pipe (4) is connected to the first end of the water replenishment pipe (100) and the water inlet of the chiller water inlet pipe (3), respectively, and a second end of the water replenishment pipe (100) is connected to the water outlet of the expansion tank (1).

5. The battery cooling device for the battery replacement heavy truck according to claim 1, wherein when the number of external batteries is one, a first end of the main cooling water outlet pipe (5) is connected to a water outlet of the cooling unit (2), a second end of the main cooling water outlet pipe (5) is connected to a water inlet of the external battery, and liquid flowing out through the second end of the main cooling water outlet pipe (5) cools an external battery system; the first end of the cooling main water inlet pipe (4) is connected to the water outlet of the external battery so as to recycle liquid cooled by the external battery, the second end of the cooling main water inlet pipe (4) is respectively connected to the water outlet of the expansion water tank (1) and the water inlet of the cooling machine water inlet pipe (3), and the water outlet of the cooling machine water inlet pipe (3) is connected to the water inlet of the cooling unit (2).

6. The battery cooling device for the battery replacement heavy truck according to claim 1, further comprising a water inlet three-way pipe (6), a third battery water outlet branch pipe (61), a fourth battery water outlet branch pipe (62), a water outlet three-way pipe (7), a first battery water inlet branch pipe (71), a second battery water inlet branch pipe (72), a third battery water inlet branch pipe (8) and a fourth battery water inlet branch pipe (9) when the external batteries are a plurality of,

the water outlet three-way pipe (7) is respectively connected with the second end of the cooling water outlet main pipe (5), the first end of the first battery water inlet branch (71) and the first end of the second battery water inlet branch (72); the second end of the first battery water inlet branch (71) is connected with the first end of the fourth battery water inlet branch (9), and the second end of the fourth battery water inlet branch (9) is connected with the fourth battery water outlet branch (62); the second end of the second battery water inlet branch (72) is connected to the first end of the third battery water inlet branch (8), the second end of the third battery water inlet branch (8) is connected to the third battery water outlet branch (61), and the third battery water outlet branch (61) and the fourth battery water outlet branch (62) are connected to the first end of the cooling water inlet main pipe (4) through the water inlet three-way pipe (6) so as to realize the circulation cooling of the plurality of external batteries.

7. The battery cooling device for a heavy-duty battery replacement card of claim 1, wherein all the liquid pipes are connected in the form of quick connectors.

8. The battery cooling device for a heavy truck according to claim 1, wherein heat-insulating cotton is wound around the outside of all the liquid pipes.

9. The battery cooling device for a heavy truck according to claim 1, wherein the heat flow check plate (201) further comprises a left check plate (2011), a top check plate (2012) and a right check plate (2013), the left check plate (2011) is located at a first side of an air outlet of the cooling unit (2), the top check plate (2012) is located at a top of the air outlet of the cooling unit (2), and the right check plate (2013) is located at a second side of the air outlet of the cooling unit (2).

10. A battery cooling system for a heavy-duty battery replacement card, comprising the battery cooling device for a heavy-duty battery replacement card according to any one of claims 1 to 9, a battery replacement box frame (11), and one or more power batteries (13), wherein,

the battery box replacing frame (11) comprises a plurality of storage layers from bottom to top, the cooling unit (2) is arranged on the left side of a top equipment layer on the first side of the battery box replacing frame (11), an air inlet of the cooling unit (2) is on the same side as the first side of the battery box replacing frame (11), and a water inlet and a water outlet of the cooling unit (2) are arranged at positions close to the inner side of the battery box replacing frame (11), wherein the first side of the battery box replacing frame (11) is the side, close to the outside, of a vehicle cab of the battery box replacing frame (11);

the top of the heat flow check plate (201) is also provided with a notch, and the notch is arranged below a top cross beam of the battery box frame (11) above the heat flow check plate (201);

the expansion water tank (1) is arranged on one side, close to the water inlet and the water outlet of the cooling unit (2), of the top equipment layer, so that a fluid supplementing path can be shortened, and meanwhile, the upper surface of a fluid adding port of the expansion water tank (1) is lower than the upper surface of the battery box frame (11);

the battery cooling device for the battery replacement heavy truck is used for cooling one or more power batteries (13), and the one or more power batteries (13) are distributed on a battery replacement box frame (11) below the cooling unit (2).