CN212257628U

CN212257628U - Thermal management system and electric hydraulic excavator

Info

Publication number: CN212257628U
Application number: CN202021587595.2U
Authority: CN
Inventors: 郝振东
Original assignee: Shanghai Sany Heavy Machinery Co Ltd
Current assignee: Shanghai Sany Heavy Machinery Co Ltd
Priority date: 2020-08-03
Filing date: 2020-08-03
Publication date: 2020-12-29
Anticipated expiration: 2030-08-03

Abstract

An embodiment of the utility model provides a heat management system and electronic hydraulic shovel relates to the heat management system field. Aims to solve the problem that the existing power battery is heated by an electric heater and has higher cost. The thermal management system comprises a hydraulic cylinder heat dissipation system, wherein the hydraulic cylinder heat dissipation system comprises a first loop and a hydraulic cylinder arranged on the first loop; the battery heating system comprises a second loop and a battery pack arranged on the second loop; and the first heat exchanger is arranged on the first loop and the second loop at the same time. Through first heat exchanger, utilize the work heat of hydraulic oil to heat the battery package, make full use of the heat energy that hydraulic system produced in the working process.

Description

Thermal management system and electric hydraulic excavator

Technical Field

The utility model relates to a heat management system field particularly, relates to a heat management system and electronic hydraulic shovel.

Background

With the continuous development of new energy technology, the engineering machinery field accelerates the step of researching and developing the electric excavator. As a power battery in a key system of the electric excavator, the performance, the service life and the reliability of the power battery are closely related to the temperature of the battery. In the prior art, the performance of the power battery is obviously reduced in a low-temperature environment, and the charge and discharge capacity is obviously restricted. Therefore, a battery thermal management system is very important.

The existing battery thermal management system generally adopts a high-voltage electric heater, but the cost of parts is high, and the heating mode is relatively single.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heat management system, for example, it can improve current power battery and adopt electric heater heating, has the higher problem of cost.

The utility model discloses an aim still includes, provides an electronic hydraulic shovel, and it can improve current power battery and adopt the electric heater heating, has the higher problem of cost.

The embodiment of the utility model discloses a can realize like this:

an embodiment of the utility model provides a thermal management system, include:

the hydraulic cylinder heat dissipation system comprises a first loop and a hydraulic cylinder arranged on the first loop; the battery heating system comprises a second loop and a battery pack arranged on the second loop; and the first heat exchanger is arranged on the first loop and the second loop at the same time.

In addition, the thermal management system provided by the embodiment of the present invention may also have the following additional technical features:

optionally: the battery heating system further comprises an energy storage device, and the energy storage device is arranged on the second loop.

Optionally: the heat management system also comprises a cab heating system, wherein the cab heating system comprises a third loop and an evaporator arranged on the third loop; the thermal management system also includes a second heat exchanger disposed on both the first loop and the third loop.

Optionally: the thermal management system also includes a third heat exchanger disposed on the first circuit.

Optionally: the first loop comprises a main circulation loop and a first branch, and two ends of the first branch are communicated with the main circulation loop;

the heat management system further comprises an oil tank, the hydraulic cylinder and the oil tank are arranged on the main circulation loop, and the first heat exchanger is arranged on the first branch and the second loop at the same time.

Optionally: the first loop also comprises a second branch, and both ends of the second branch are communicated with the main circulation loop;

the second heat exchanger is arranged on the second branch and the third loop at the same time.

Optionally: the first loop also comprises a third branch, and both ends of the third branch are communicated with the main circulation loop;

the third heat exchanger is arranged on the third branch.

Optionally: the first branch, the second branch and the third branch are communicated at the same position at one end close to the hydraulic cylinder.

Optionally: the heat management system also comprises a first delivery pump, a second delivery pump and a third delivery pump;

the first delivery pump is arranged on the main circulation loop, the second delivery pump is arranged on the second loop, and the third delivery pump is arranged on the third loop.

The embodiment of the utility model provides an electric hydraulic excavator is still provided. The electro-hydraulic excavator includes a thermal management system.

The utility model discloses thermal management system and electric hydraulic shovel's beneficial effect includes, for example:

the heat management system comprises a first heat exchanger, a second heat exchanger and a battery pack, wherein the first heat exchanger is used for exchanging heat between a first loop and a second loop, the battery pack is heated by using the working heat of hydraulic oil, the heat energy generated by a hydraulic system in the working process is fully utilized, the energy waste is reduced, the energy utilization rate of the whole excavator is improved, the energy conservation and emission reduction are achieved, and the excavator is more intelligent. Meanwhile, heat generated by hydraulic energy is utilized to provide heat for preheating the battery, and cold start of the power battery is reduced.

The electric hydraulic excavator comprises the thermal management system, and the problem that the existing power battery is heated by an electric heater and has high cost can be solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a thermal management system according to an embodiment of the present invention.

Icon: 10-a thermal management system; 100-a first loop; 110-a main circulation loop; 111-hydraulic cylinder; 112-a first delivery pump; 113-oil tank; 120-a first branch; 130-a second branch; 140-a third branch; 200-a second loop; 210-an energy storage; 220-a second delivery pump; 230-a battery pack; 300-a third loop; 310-an evaporator; 320-a third delivery pump; 400-a first heat exchanger; 410-a second heat exchanger; 420-third heat exchanger.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

The thermal management system 10 provided in the present embodiment is described in detail below with reference to fig. 1.

Referring to fig. 1, an embodiment of the present invention provides a thermal management system 10, including: the hydraulic cylinder heat dissipation system comprises a first loop 100 and a hydraulic cylinder 111 arranged on the first loop 100; a battery heating system including a second circuit 200 and a battery pack 230 disposed on the second circuit 200; and a first heat exchanger 400, wherein the first heat exchanger 400 is provided in both the first circuit 100 and the second circuit 200.

The heat generated during the operation of the hydraulic cylinder 111 is dissipated through the hydraulic cylinder heat dissipation system. The high-temperature hydraulic oil flows to the first heat exchanger 400 through the first loop 100, exchanges heat with battery cooling liquid in the second loop 200 at the first heat exchanger 400, and supplies heat to the battery after the cooling liquid obtains heat.

The present embodiment will be described by taking the thermal management system 10 of the electric excavator as an example. After the electric excavator works normally, the high-temperature hydraulic oil exchanges heat with the battery cooling liquid in the second loop 200 in the first heat exchanger 400, and the battery is supplied with heat after the cooling liquid obtains heat.

With continued reference to fig. 1, in the present embodiment, the battery heating system further includes an accumulator 210, and the accumulator 210 is disposed on the second circuit 200.

The coolant flows into the energy storage device 210 to store heat after obtaining heat, and when the electric excavator stops for a short time and the average temperature of the battery is lower than the low temperature of the battery, the coolant in the energy storage device 210 supplies heat to the battery and maintains the temperature of the working environment of the battery.

Specifically, referring to fig. 1, the first circuit 100 includes a main circulation circuit 110 and a first branch 120, both ends of the first branch 120 are communicated with the main circulation circuit 110; the thermal management system 10 further comprises a tank 113, a hydraulic cylinder 111 and the tank 113 are arranged on the main circulation circuit 110, and a first heat exchanger 400 is arranged on both the first branch circuit 120 and the second circuit 200.

The high-temperature hydraulic oil flowing out of the hydraulic cylinder 111 flows to the main circulation circuit 110, then partially flows to the first branch circuit 120, exchanges heat with the battery coolant in the second circuit 200 through the first heat exchanger 400, and then flows back to the oil tank 113.

Specifically, with continued reference to fig. 1, the thermal management system 10 further includes a first transfer pump 112 and a second transfer pump 220, the first transfer pump 112 being disposed on the primary circulation loop 110, the second transfer pump 220 being disposed on the second loop 200.

The first transfer pump 112 is used for providing power for the high-temperature hydraulic oil to circulate along the main circulation loop 110 and simultaneously providing power for the high-temperature hydraulic oil to flow to the first branch 120. The high-temperature hydraulic oil flowing out of the hydraulic cylinder 111 flows to the first branch 120, and exchanges heat with the battery coolant through the first heat exchanger 400.

The second delivery pump 220 is used for providing power for the battery cooling liquid to flow back and forth along the circulation in the second loop 200, the battery cooling liquid flows to the first heat exchanger 400 to obtain heat of the high-temperature hydraulic oil, then flows to the energy storage device 210 to be stored, and when the temperature of the battery pack 230 is lower than a preset temperature, the heat is released to the battery pack 230.

With continued reference to fig. 1, in this embodiment, the thermal management system 10 further includes a cab heating system including a third circuit 300 and an evaporator 310 disposed on the third circuit 300; the thermal management system 10 also includes a second heat exchanger 410, the second heat exchanger 410 being disposed on both the first loop 100 and the third loop 300.

The heat generated by the hydraulic energy is utilized to provide heat for the cab. The high-temperature hydraulic oil also exchanges heat with the cab heating coolant in the third loop 300 through the second heat exchanger 410 to provide heat for the cab, so that a comfortable environment is created.

Specifically, referring to fig. 1, the first circuit 100 further includes a second branch 130, and both ends of the second branch 130 are communicated with the main circulation circuit 110; the second heat exchanger 410 is disposed on both the second branch 130 and the third circuit 300.

The high-temperature hydraulic oil discharged from the hydraulic cylinder 111 flows to the main circulation circuit 110, and then partially flows to the second branch circuit 130, and exchanges heat with the cab heating coolant in the third circuit 300 through the second heat exchanger 410.

Specifically, referring to fig. 1, the thermal management system 10 further includes a third transfer pump 320, the third transfer pump 320 being disposed on the third circuit 300.

The third transfer pump 320 provides power for circulating the cab heating coolant along the third circuit 300. The heating coolant obtains heat through the second heat exchanger 410 during the flow process.

With continued reference to fig. 1, in this embodiment, the thermal management system 10 further includes a third heat exchanger 420, and the third heat exchanger 420 is disposed on the first circuit 100.

A part of the high-temperature hydraulic oil flowing out of the hydraulic cylinder 111 enters the first heat exchanger 400 to exchange heat with the battery pack 230 coolant, a part of the high-temperature hydraulic oil flows through the second heat exchanger 410 to exchange heat with the cab heating coolant, and the other part of the high-temperature hydraulic oil directly enters the third heat exchanger 420 to be cooled.

Specifically, referring to fig. 1, the first circuit 100 further includes a third branch 140, and both ends of the third branch 140 are communicated with the main circulation circuit 110; a third heat exchanger 420 is disposed on the third branch 140.

The high-temperature hydraulic oil flowing out of the hydraulic cylinder 111 flows to the main circulation loop 110, and then partially flows to the third branch 140, and exchanges heat through the third heat exchanger 420.

With continued reference to fig. 1, in the present embodiment, the ends of the first branch 120, the second branch 130, and the third branch 140 close to the hydraulic cylinder 111 are communicated at the same position.

After flowing out, the high-temperature hydraulic oil of the hydraulic cylinder 111 flows to the first branch 120, the second branch 130 and the third branch 140 at the same position, so that the high-temperature hydraulic oil can be uniformly distributed, and the heat supply of the first branch 120 and the second branch 130 is satisfied.

The embodiment of the utility model provides an electric hydraulic excavator is still provided. The electrohydraulic excavator includes a thermal management system 10. The problem that the existing power battery is heated by an electric heater and has higher cost can be solved.

In some embodiments:

please refer to fig. 1: fig. 1 shows a schematic diagram of a thermal management system 10, in which a first circuit 100 includes a main circulation circuit 110, a first branch circuit 120, a second branch circuit 130, and a third branch circuit 140, a hydraulic cylinder 111, a first transfer pump 112, and a tank 113 are disposed on the main circulation circuit 110, and the first branch circuit 120, the second branch circuit 130, and the third branch circuit 140 are connected in parallel to the main circulation circuit 110. The battery pack 230, the accumulator 210, and the second transfer pump 220 are provided on the second circuit 200. A third transfer pump 320 and a cab evaporator 310 are provided on the third circuit 300. The first heat exchanger 400 is disposed on the first branch 120 and the second loop 200, and is configured to exchange heat between the high-temperature hydraulic oil and the coolant of the battery pack 230, and the high-temperature hydraulic oil flows out from the hydraulic cylinder 111, then flows to the first branch 120, and then flows back to the oil tank 113. The second heat exchanger 410 is disposed on the second branch 130 and the third loop 300, and is configured to exchange heat between the high-temperature hydraulic oil and the cab heating coolant, and the high-temperature hydraulic oil flows out of the hydraulic cylinder 111, then flows to the second branch 130, then flows back to the third branch 140, and then flows back to the oil tank 113. The third heat exchanger 420 is disposed on the third branch 140, and is used for cooling the high-temperature hydraulic oil, and then returns to the oil tank 113.

The present embodiment provides a thermal management system 10 with at least the following advantages:

the battery pack 230 is heated by using heat energy generated during the operation of the hydraulic system, and the operating environment temperature of the battery pack 230 is maintained. The energy storage device 210 is arranged on the second loop 200, the cooling liquid flows into the energy storage device 210 to store heat after obtaining the heat, and when the electric excavator stops for a short time and the average temperature of the battery is lower than the low temperature of the battery, the cooling liquid in the energy storage device 210 supplies heat for the battery.

The heat energy generated in the working process of the hydraulic system is utilized to heat the cab. The energy waste is reduced, and the energy utilization rate of the whole vehicle is improved.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A thermal management system, comprising:

a hydraulic cylinder heat dissipation system including a first circuit (100) and a hydraulic cylinder (111) disposed on the first circuit (100);

a battery heating system comprising a second circuit (200) and a battery pack (230) disposed on the second circuit (200);

a first heat exchanger (400), the first heat exchanger (400) being disposed on both the first circuit (100) and the second circuit (200).

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

the battery heating system further comprises an energy storage (210), the energy storage (210) being arranged on the second circuit (200).

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

the thermal management system further comprises a cab heating system comprising a third circuit (300) and an evaporator (310) disposed on the third circuit (300);

the thermal management system further comprises a second heat exchanger (410), the second heat exchanger (410) being arranged on both the first circuit (100) and the third circuit (300).

4. The thermal management system of claim 3, wherein:

the thermal management system also includes a third heat exchanger (420), the third heat exchanger (420) being disposed on the first circuit (100).

5. The thermal management system of claim 4, wherein:

the first circuit (100) comprises a main circulation circuit (110) and a first branch circuit (120), and both ends of the first branch circuit (120) are communicated with the main circulation circuit (110);

the thermal management system further comprises an oil tank (113), the hydraulic cylinder (111) and the oil tank (113) are arranged on the main circulation circuit (110), and the first heat exchanger (400) is arranged on the first branch circuit (120) and the second circuit (200) at the same time.

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

the first circuit (100) further comprises a second branch (130), both ends of the second branch (130) are communicated with the main circulation circuit (110);

the second heat exchanger (410) is arranged on both the second branch (130) and the third circuit (300).

7. The thermal management system of claim 6, wherein:

the first circuit (100) further comprises a third branch (140), both ends of the third branch (140) are communicated with the main circulation circuit (110);

the third heat exchanger (420) is disposed on the third branch (140).

8. The thermal management system of claim 7, wherein:

the first branch (120), the second branch (130) and the third branch (140) are communicated at the same position close to one end of the hydraulic cylinder (111).

9. The thermal management system of claim 8, wherein:

the thermal management system further comprises a first delivery pump (112), a second delivery pump (220), and a third delivery pump (320);

the first delivery pump (112) is provided on the main circulation circuit (110), the second delivery pump (220) is provided on the second circuit (200), and the third delivery pump (320) is provided on the third circuit (300).

10. An electric hydraulic excavator is characterized in that:

the electrohydraulic excavator includes the thermal management system of any one of claims 1-9.