Energy storage heat management system with dehumidification function

Abstract

The utility model relates to an energy storage heat management system with a dehumidification function, which comprises a refrigerant loop configured to circulate a refrigerant, and the refrigerant in the refrigerant loop can cool a cooling liquid in a cooling liquid loop; the refrigerating system assembly is arranged on the refrigerating loop; the cooling liquid loop is used for circulating cooling liquid so as to cool the battery and air, and the cooling liquid loop comprises a cooling liquid main loop and a cooling liquid branch communicated with the cooling liquid main loop; one part of the evaporator communicates with the refrigerant loop, the other part of the evaporator communicates with the cooling liquid main loop, and the evaporator is configured to transfer heat between the refrigerant loop and the cooling liquid main loop; a dehumidified air circuit configured to circulate air; one part of the dehumidification heat exchanger communicates with the cooling liquid branch, the other part of the dehumidification heat exchanger communicates with the dehumidification air loop, and the dehumidification heat exchanger is configured to transfer heat between the cooling liquid branch and the dehumidification air loop so as to cool air.

Description

Technical Field

[0001] The utility model relates to the technical field of heat management, in particular to an energy storage heat management system with a dehumidification function. Background Art

[0002] Thermal management refers to the management and control of the temperature of the overall system, individual components, or their environment, with the goal of maintaining proper operation or improving the performance or lifespan of each component. Currently, thermal management is commonly required in fields such as electrochemical energy storage, where it significantly impacts the performance, lifespan, and safety of energy storage systems.

[0003] Most thermal management systems currently used for energy storage do not have integrated dehumidification modules. Instead, they only install energy storage thermal management units. The battery compartments containing the batteries cannot be dehumidified, and condensation easily forms on the battery surfaces, resulting in poor safety. Even if some energy storage thermal management units have integrated dehumidification modules, there are still drawbacks:

[0004] (1) When an additional dehumidifier is added to the battery compartment, it takes up space in the battery compartment and is costly;

[0005] (2) Adding an additional dehumidifier unit will complicate the control system of the battery energy storage integrator;

[0006] (3) The existing energy storage thermal management unit with integrated dehumidification takes a portion of the cooling capacity from the refrigerant circuit for dehumidification in principle. This diverted refrigerant can easily cause the refrigerant flowing through the evaporator to be unstable, thereby causing large fluctuations in the coolant outlet temperature, affecting battery performance; the refrigerant side pipeline of the existing energy storage thermal management unit with integrated dehumidification is prone to refrigerant migration, resulting in insufficient refrigerant flowing through the main circulation circuit, affecting the heat exchange capacity. Utility Model Content

[0007] In order to solve at least some of the above problems in the prior art, the present invention provides an energy storage thermal management system with a dehumidification function, comprising:

[0008] a refrigerant circuit configured to circulate a refrigerant, wherein the refrigerant in the refrigerant circuit is capable of cooling a coolant in the coolant circuit;

[0009] Refrigeration system components, which are arranged on the refrigeration circuit;

[0010] A coolant circuit for circulating coolant to cool the battery and air, the coolant circuit comprising a coolant main circuit and a coolant branch circuit connected to the coolant main circuit;

[0011] an evaporator having a portion in communication with the refrigerant circuit and another portion in communication with the main coolant circuit, and being configured to transfer heat between the refrigerant circuit and the main coolant circuit;

[0012] a dehumidified air circuit configured to circulate air; and

[0013] The dehumidification heat exchanger has a portion communicating with the coolant branch and another portion communicating with the dehumidified air circuit, and is configured to transfer heat between the coolant branch and the dehumidified air circuit to cool the air.

[0014] Furthermore, the refrigeration system components include:

[0015] a compressor disposed on the refrigerant circuit and configured to compress the refrigerant;

[0016] a condenser, which is arranged on the refrigerant circuit and communicated with the compressor;

[0017] A throttling element is provided on the refrigerant circuit and communicated with the condenser.

[0018] Furthermore, it also includes:

[0019] A regulating valve is provided on the coolant branch;

[0020] A fan is provided on the dehumidification air circuit.

[0021] Furthermore, it also includes a water pump, which is arranged on the coolant main circuit.

[0022] Furthermore, it also includes a water supply tank, which is arranged on the main coolant circuit.

[0023] Further, the evaporator includes a first inlet and a first outlet for the refrigerant to flow through, and a second inlet and a second outlet for the cooling liquid to flow through;

[0024] The dehumidification heat exchanger includes a first inlet and a first outlet for coolant to flow through, and a second inlet and a second outlet for air to flow through.

[0025] Furthermore, the first end of the coolant branch is communicated with the second outlet of the evaporator, and the second end of the coolant branch is communicated with the water inlet of the water pump.

[0026] Furthermore, a water collecting device and a condensed water drain outlet are provided at the lower portion of the dehumidification heat exchanger.

[0027] Furthermore, a humidity sensor is included, which is arranged in the battery compartment.

[0028] Furthermore, it also includes a control system, which is used to control the operation of the energy storage thermal management system.

[0029] The present invention has at least the following beneficial effects: (1) The energy storage thermal management system with dehumidification function disclosed by the present invention obtains coldness from the coolant side, does not affect the migration and distribution of the refrigerant in the refrigeration system, and improves the reliability of the refrigerant cycle; (2) The integrated dehumidification function can not only cool the battery in the battery compartment, but also avoid the generation of condensed water on the battery surface, thereby improving the performance and safety reliability of the battery; (3) The dehumidification module is integrated inside the thermal management unit, saving the space area in the battery compartment and reducing the cost; (4) The control of the dehumidification module is integrated inside the thermal management unit, simplifying the control system of the battery integrator; (5) The coolant of the dehumidification branch will flow back to the water pump again, and there is a water supply tank in the coolant system to ensure the coolant flow through the evaporator and the battery end, without affecting the heat exchange demand of the battery end. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To further illustrate the above and other advantages and features of various embodiments of the present invention, a more detailed description of various embodiments of the present invention will be presented with reference to the accompanying drawings. It will be understood that these drawings depict only typical embodiments of the present invention and are not to be considered as limiting the scope thereof. In the drawings, for clarity, identical or corresponding components will be represented by the same or similar reference numerals.

[0031] Figure 1 A schematic diagram of an energy storage thermal management system with a dehumidification function according to an embodiment of the present invention is shown.

[0032] Reference numerals: 10 refrigerant circuit, 11 compressor, 12 condenser, 13 throttling element, 14 evaporator, 15 coolant main circuit, 16 coolant branch circuit, 17 regulating valve, 18 dehumidification heat exchanger, 19 water pump, 20 water supply tank, 21 dehumidification air circuit, 22 fan. DETAILED DESCRIPTION

[0033] It should be noted that components in the drawings may be shown exaggerated for illustrative purposes and are not necessarily true to scale.

[0034] In the present invention, each embodiment is only intended to illustrate the solution of the present invention and should not be understood as limiting.

[0035] In the present invention, unless otherwise specified, the quantifiers "a" and "an" do not exclude the presence of multiple elements.

[0036] It should also be pointed out that in the embodiments of the present invention, for the sake of clarity and simplicity, only a portion of the parts or components may be shown, but a person skilled in the art will understand that under the guidance of the present invention, the required parts or components may be added according to the needs of the specific scenario.

[0037] It should also be pointed out that within the scope of the present invention, the terms "same", "equal", "equal to" and so on do not mean that the two values ​​are absolutely equal, but allow a certain reasonable error, that is, the terms also cover "substantially the same", "substantially equal", "substantially equal to".

[0038] It should also be noted that in the description of this utility model, the terms "center," "longitudinal," "transverse," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not explicitly or implicitly state that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In addition, the embodiments of the present invention describe the process steps in a specific order, but this is only for the convenience of distinguishing the steps, and does not limit the order of the steps. In different embodiments of the present invention, the order of the steps can be adjusted according to the adjustment of the process.

[0040] In the present invention, high temperature > low temperature, high pressure > low pressure.

[0041] Figure 1 A schematic diagram of an energy storage thermal management system with a dehumidification function according to an embodiment of the present invention is shown.

[0042] like Figure 1 As shown, an energy storage thermal management system with dehumidification function includes a refrigerant circuit 10, a refrigeration system component, an evaporator 14, a coolant circuit, a regulating valve 17, a dehumidification heat exchanger 18, a water pump 19, a water supply tank 20, a dehumidification air circuit 21, and a fan 22.

[0043] The refrigerant circuit 10 is configured to circulate a refrigerant, wherein the refrigerant in the refrigerant circuit 10 can cool the coolant in the coolant circuit.

[0044] The refrigeration system components are arranged on a refrigerant circuit 10 and include a compressor 11, a condenser 12, and a throttling element 13. Compressor 11 is configured to compress refrigerant. Condenser 12 is in communication with compressor 11 and is configured to condense refrigerant. Throttling element 13 is in communication with condenser 12 and may include an expansion valve, a throttling tube, a capillary tube, or the like.

[0045] The coolant circuit includes a main coolant circuit 15 and a branch coolant circuit 16. The coolant circuit circulates coolant. The coolant flowing through the main coolant circuit 15 cools the batteries in the battery compartment, while the coolant flowing through the branch coolant circuit 16 cools the air in the dehumidified air circuit 21. Both ends of the branch coolant circuit 16 are connected to the main coolant circuit 15.

[0046] A portion of the evaporator 14 is in communication with the refrigerant circuit 10 , and another portion is in communication with the coolant main circuit 15 . The evaporator 14 is configured to transfer heat between the refrigerant circuit and the coolant main circuit, wherein the evaporator 14 includes a first inlet and a first outlet for the refrigerant to flow through, and a second inlet and a second outlet for the coolant to flow through.

[0047] A first end of the coolant branch 16 is connected to the second outlet of the evaporator 14, and a second end of the coolant branch 16 is connected to the water inlet of the water pump 19. A portion of the coolant passing through the evaporator 14 enters the coolant branch 16 and then flows into the coolant main circuit 15.

[0048] The regulating valve 17 and the dehumidification heat exchanger 18 are arranged on the coolant branch 16. The regulating valve 17 can control the coolant to enter the coolant branch 16.

[0049] After the coolant is cooled by the evaporator 14 , part of it circulates in the coolant main circuit 15 to cool the battery, and part of it enters the coolant branch circuit 16 to cool the air in the dehumidification heat exchanger 18 before returning to the coolant main circuit 15 .

[0050] The water pump 19 is provided on the coolant main circuit 15 to provide power for the circulation of the coolant in the coolant main circuit 15 and the coolant branch circuit 16 .

[0051] The water supply tank 20 is connected to the coolant main circuit 15. The provision of the water supply tank 20 ensures the coolant flow through the evaporator and the battery end.

[0052] A fan 22 is provided on the dehumidification air circuit 21. The battery is placed in the battery compartment, and the dehumidification air circuit 21 is communicated with the battery compartment.

[0053] A portion of the dehumidifying heat exchanger 18 communicates with the coolant branch 16, and another portion communicates with the dehumidified air circuit 21. The dehumidifying heat exchanger 18 is configured to transfer heat between the coolant branch 16 and the air circuit 21 to cool the air. The dehumidifying heat exchanger 18 includes a first inlet and a first outlet for the coolant to flow through, and a second inlet and a second outlet for the air to flow through. A water collection device and a condensate drain are provided at the bottom of the dehumidifying heat exchanger 18. The high-temperature, high-humidity air within the battery compartment is cooled as it passes through the dehumidifying heat exchanger 18. The moisture in the air condenses into condensed water, which is collected by the water collection device and discharged through the condensate drain.

[0054] The dehumidification cycle draws cooling energy from the coolant circulation, which is drawn from the outlet of evaporator 14, passes through dehumidification heat exchanger 18, and then returns to the upstream of water pump 19. The dehumidification air circuit is powered by fan 22, which drives the air in the battery compartment to circulate through the dehumidification heat exchanger.

[0055] The energy storage thermal management system also includes a humidity sensor, which is arranged in the battery compartment to detect the humidity in the battery compartment.

[0056] The energy storage thermal management system also includes a control system that controls the operation of the energy storage thermal management system. When the humidity sensor detects a need for dehumidification in the battery compartment, the control system instructs the regulating valve 17 and fan 22 to operate simultaneously to dehumidify the battery compartment until the dehumidification need is resolved.

[0057] The control of the dehumidification module is integrated into the control system of the thermal management unit, simplifying the control system of the battery integrator.

[0058] The energy storage thermal management system with dehumidification function includes three major cycles: refrigerant cycle, coolant cycle and dehumidified air cycle.

[0059] (1) Refrigerant cycle

[0060] a→b: isentropic compression process of refrigerant in the compressor;

[0061] b→c: The refrigerant releases heat at equal pressure in the condenser;

[0062] c→d; isenthalpic throttling process of refrigerant in the throttling element;

[0063] d→a: The refrigerant absorbs heat at equal pressure in the evaporator.

[0064] (2) Coolant circulation

[0065] The water pump serves as the power source for coolant circulation, with the high-pressure side downstream of the pump and the low-pressure side upstream. The coolant and refrigerant transfer heat within the evaporator, and the heat released by the battery ultimately transfers energy through the evaporator. When the battery generates heat, the coolant acts as a coolant to cool the battery. The water pump then transfers the heat-carrying coolant to the refrigerant within the evaporator, where it then flows back to cool the battery.

[0066] (3) Dehumidification air circulation

[0067] When the humidity sensor detects that the humidity in the battery compartment has reached the set value, it sends a signal to the control system. The control system opens the regulating valve 17, directing a portion of the coolant to flow through the dehumidification heat exchanger 18, and at the same time turns on the fan 22. The forced convection of the fan 22 causes the high-temperature and high-humidity air in the battery compartment to flow through the dehumidification heat exchanger 18 with a lower temperature. When passing through the surface of the dehumidification heat exchanger 18, the high-temperature and high-humidity air will be cooled, and the moisture in the air will condense into condensed water, which will then attach to and flow into the water collection device and be discharged from the condensation water drain outlet. This dehumidification module only requires an air circuit composed of two air duct-like air guide structures. The air in the energy storage battery compartment is introduced from the air inlet of the dehumidification heat exchanger and then discharged from the air outlet. In this way, the high-temperature and high-humidity air in the energy storage battery compartment can be dehumidified.

[0068] Although certain embodiments of the present invention have been described in this application, those skilled in the art will appreciate that these embodiments are provided for illustrative purposes only. Numerous variations, alternatives, and improvements will be contemplated by those skilled in the art based on the teachings of this invention without departing from the scope of this invention. The appended claims are intended to define the scope of this invention and are intended to encompass methods and structures within the scope of these claims and their equivalents.

Claims

1. An energy storage thermal management system with dehumidification function, characterized in that: include: a refrigerant circuit configured to circulate a refrigerant, wherein the refrigerant in the refrigerant circuit is capable of cooling a coolant in the coolant circuit; Refrigeration system components, which are arranged on the refrigeration circuit; A coolant circuit for circulating coolant to cool the battery and air, the coolant circuit comprising a coolant main circuit and a coolant branch circuit connected to the coolant main circuit; an evaporator having a portion in communication with the refrigerant circuit and another portion in communication with the main coolant circuit, and being configured to transfer heat between the refrigerant circuit and the main coolant circuit; a dehumidified air circuit configured to circulate air; and The dehumidification heat exchanger has a portion communicating with the coolant branch and another portion communicating with the dehumidified air circuit, and is configured to transfer heat between the coolant branch and the dehumidified air circuit to cool the air.

2. The energy storage thermal management system with dehumidification function according to claim 1, characterized in that: The refrigeration system components include: a compressor disposed on the refrigerant circuit and configured to compress the refrigerant; a condenser, which is arranged on the refrigerant circuit and communicated with the compressor; A throttling element is provided on the refrigerant circuit and communicated with the condenser.

3. The energy storage thermal management system with dehumidification function according to claim 1, characterized in that: Also includes: A regulating valve is provided on the coolant branch; A fan is provided on the dehumidification air circuit.

4. The energy storage thermal management system with dehumidification function according to claim 1, characterized in that: It also includes a water pump, which is arranged on the coolant main circuit.

5. The energy storage thermal management system with dehumidification function according to claim 1, characterized in that: It also includes a water supply tank, which is arranged on the coolant main circuit.

6. The energy storage thermal management system with dehumidification function according to claim 4, characterized in that: The evaporator includes a first inlet and a first outlet for the refrigerant to flow therethrough, and a second inlet and a second outlet for the cooling liquid to flow therethrough; The dehumidification heat exchanger includes a first inlet and a first outlet for coolant to flow through, and a second inlet and a second outlet for air to flow through.

7. The energy storage thermal management system with dehumidification function according to claim 6, characterized in that: The first end of the coolant branch is communicated with the second outlet of the evaporator, and the second end of the coolant branch is communicated with the water inlet of the water pump.

8. The energy storage thermal management system with dehumidification function according to claim 1, characterized in that: A water collecting device and a condensed water drain outlet are provided at the lower part of the dehumidification heat exchanger.

9. The energy storage thermal management system with dehumidification function according to claim 3, characterized in that: Also included is a humidity sensor disposed within the battery compartment.

10. The energy storage thermal management system with dehumidification function according to claim 9, characterized in that: Also included is a control system for controlling the operation of the energy storage thermal management system.

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