CN217823008U - Water chilling unit for direct-hanging energy storage system - Google Patents
Water chilling unit for direct-hanging energy storage system Download PDFInfo
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- CN217823008U CN217823008U CN202221420453.6U CN202221420453U CN217823008U CN 217823008 U CN217823008 U CN 217823008U CN 202221420453 U CN202221420453 U CN 202221420453U CN 217823008 U CN217823008 U CN 217823008U
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Abstract
The utility model relates to a direct-hanging energy storage is cooling water set for system, interior cold side return circuit and refrigeration side return circuit, interior cold side return circuit include main circulation loop and deionization branch road, main circulation loop includes cold drawing, water pump, heater and the filter of series connection, deionization branch road includes the deionization jar with cold drawing parallel connection; the refrigeration side loop comprises a compressor, a condenser, a drying filter, an electronic expansion valve and an evaporator which are connected in series; the heat exchange medium in the inner cooling side loop exchanges heat with the cell stack of the direct-hanging energy storage system when passing through the cold plate, and the heat exchange medium exchanges heat with the refrigerant working medium in the refrigerating side loop through the evaporator. The utility model discloses can deal with the heat dissipation demand that increases along with it after energy storage system energy density increases, realize evenly dispelling the heat simultaneously, guarantee the radiating effect, avoid the heat dissipation blind spot, battery core temperature difference is little.
Description
Technical Field
The utility model belongs to the technical field of the cooling of battery energy storage system, concretely relates to directly hang cooling water set for energy storage system.
Background
With the rapid development of wind and light renewable energy sources, the uncertainty of wind and light power generation power brings huge challenges to the real-time balance of power production and consumption, and the demand of energy storage is promoted to rapidly develop towards the direction of scale and large capacity. The inconsistency of the battery cores enables the safety of the battery energy storage system to be sharply reduced along with the increase of the serial and parallel connection number of the battery cores, and the problem seriously restricts the improvement of the capacity of the battery stack. The energy storage battery pack is incorporated into the direct current capacitor of the chain type converter, the high-voltage direct-hanging chain type energy storage converter is formed, the 'segmentation control' of a large number of batteries can be directly realized, the battery circulation is avoided, the safety problem is solved, the complexity of a battery management system is greatly reduced, the current equalizing path between the battery packs is shortened, the transformer can be saved, the efficiency of the system is effectively improved, and the cost is reduced.
The density of the battery pack with high-voltage direct-hanging chain type energy storage is higher than that of other energy storage systems, accordingly, the heat dissipation requirement of the battery pack is higher and higher, and the battery pack needs to be rapidly dissipated so as to reach an ideal working temperature and avoid adverse consequences such as shortened service life of a battery due to overheating of the battery pack. The existing battery pack cooling equipment adopts an air-cooled forced convection heat dissipation mode, so that the interior of a battery pack is difficult to cool, wind is difficult to disperse uniformly, and a certain dead zone exists. When the surface temperature of the battery is too high, the internal temperature of the battery often exceeds the upper limit of the allowable temperature, and the service life of the battery pack is easily influenced.
Therefore, how to solve the problems of large heat productivity, heat dissipation dead zone and the like of high-voltage direct-hanging energy storage is a urgent task for those skilled in the art at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a hang cooling water set for energy storage system directly to solve the poor problem of energy storage system radiating effect of hanging directly.
The utility model discloses a hang energy storage is cooling water set for system directly realizes like this:
a water chilling unit for a direct-hanging energy storage system is provided with an inner cooling side loop and comprises a main circulation loop and a deionization branch, wherein the main circulation loop comprises a cold plate, a water pump, a heater and a filter which are connected in series, and the deionization branch comprises a deionization tank which is connected with the cold plate in parallel;
a refrigeration-side circuit including a compressor, a condenser, a dry filter, an electronic expansion valve, and an evaporator connected in series;
and the heat exchange medium in the inner cooling side loop exchanges heat with the cell stack of the direct-hanging energy storage system when passing through the cold plate, and the heat exchange medium and the refrigerant working medium in the refrigeration side loop exchange heat through the evaporator.
Furthermore, the water pump is arranged on the cold plate and the water outlet side of the deionization branch, and the water inlet side of the water pump is provided with an air bag type expansion tank on the main circulation loop.
Furthermore, a flow switch positioned on the main circulation loop is arranged on the water inlet side of the cold plate.
Furthermore, a conductivity transmitter positioned on the main circulation loop is arranged on the water inlet side of the cold plate.
Further, the filter is arranged on the water inlet side of the cold plate.
Furthermore, a butterfly valve, a pressure transmitter and a temperature transmitter which are positioned on the main circulation loop are respectively arranged on the water inlet side and the water outlet side of the cold plate.
Furthermore, a water drainage pipeline is arranged on the inner cooling side loop, and a water drainage valve is installed on the water drainage pipeline.
Furthermore, an exhaust valve is arranged on the inner cooling side loop.
Furthermore, a precision filter positioned on the deionization branch is arranged on the water outlet side of the deionization tank.
Further, the compressor is positioned on the water inlet side of the condenser.
After the technical scheme is adopted, the utility model discloses the beneficial effect who has does:
(1) The utility model can meet the heat dissipation requirement of energy density increase of the energy storage system, and simultaneously realize uniform heat dissipation, guarantee the heat dissipation effect, avoid the heat dissipation dead zone and have small temperature difference of the battery core body;
(2) The utility model ensures the conductivity of the heat exchange medium to be at a low level due to the deionized branch, and meets the insulation requirement under the working condition of high voltage of the direct-hanging energy storage system;
(3) The utility model discloses owing to be provided with the heater, can possess simultaneously and refrigerate and heat the function, still can ensure when external environment temperature changes that the battery is in suitable working range, it is more convenient to use.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of a water chilling unit for a direct-hanging energy storage system according to a preferred embodiment of the present invention;
in the figure: the device comprises an inner cold side loop 1, a main circulation loop 1-1, a deionization branch 1-2, a refrigeration side loop 2, a cold plate 3, a water pump 4, a heater 5, a filter 6, a deionization tank 7, a compressor 8, a condenser 9, an evaporator 10, an air bag type expansion tank 11, a water pump frequency converter 12, a flow switch 13, a conductivity transmitter 14, a butterfly valve I15, a pressure transmitter I16, a temperature transmitter I17, a butterfly valve II 18, a temperature transmitter II 19, a pressure transmitter II 20, a drainage pipeline 21, a drainage valve 22, an exhaust valve 23, a precision filter 24, a drying filter 25, an electronic expansion valve 26, a compressor frequency converter 27, a condenser fan frequency converter 28 and a battery stack 29.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
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 work belong to the protection scope of the present invention.
As shown in fig. 1, a water chilling unit for a direct-hanging energy storage system comprises an internal cooling side loop 1 and a refrigeration side loop 2, wherein the internal cooling side loop 1 comprises a main circulation loop 1-1 and a deionization branch 1-2, the main circulation loop 1-1 comprises a cold plate 3, a water pump 4, a heater 5 and a filter 6 which are connected in series, and the deionization branch 1-2 comprises a deionization tank 7 connected in parallel with the cold plate 3; the refrigeration-side circuit 2 includes a compressor 8, a condenser 9, a dry filter 25, an electronic expansion valve 26, and an evaporator 10 connected in series; the heat exchange medium in the inner cooling side loop 1 exchanges heat with the cell stack 29 of the direct-hanging energy storage system when passing through the cold plate 3, and the heat exchange medium and the refrigerant working medium in the refrigeration side loop 2 exchange heat through the evaporator 10.
Specifically, the inner cooling side loop 1 and the refrigeration side loop 2 are connected with the same evaporator 10, wherein the heat exchange medium in the inner cooling side loop 1 and the refrigerant working medium in the refrigeration side loop 2 exchange heat in the evaporator 10, and the temperature of the heat exchange medium is reduced through the refrigerant working medium.
In this embodiment, the heat exchange medium is deionized water.
Preferably, the heater 5 may be an electric heater 5 for adjusting the heating temperature.
In the present embodiment, the heater 5 is located at the water inlet side of the deionization branch 1-2 and the cold plate 3.
The water pump 4 is arranged to flow deionized water in the inner cold-side loop 1, and therefore the water pump 4 is arranged on the cold plate 3 and the water outlet side of the deionization branch 1-2.
An air bag type expansion tank 11 positioned on the main circulation loop 1-1 is arranged at the water inlet side of the water pump 4.
When the pressure or water quantity of the heat exchange medium in the internal cooling side loop 1 is unstable due to temperature change and the like, the air bag type expansion tank 11 can absorb or discharge partial water quantity through air bag volume change so as to level volume change caused by water temperature change and reduce pressure fluctuation of the internal cooling side loop 1.
In the embodiment, the airbag type expansion tank 11 is arranged on the water outlet side of the cold plate 3, and a pipeline thereof is connected with the deionization branch 1-2 in parallel.
Preferably, the water pump 4 is a variable frequency water pump in order to reduce energy consumption.
Specifically, the water pump 4 is connected with a water pump frequency converter 12.
In order to adjust the flow of the deionized water entering the cold plate 3 conveniently, a flow switch 13 positioned on the main circulation loop 1-1 is arranged on the water inlet side of the cold plate 3.
In this embodiment, the flow switch 13 is located on the inlet side of the cold plate 3 and the deionization branch 1-2.
In order to be able to detect the conductivity of the deionized water entering the cold plate 3, the water inlet side of the cold plate 3 is provided with a conductivity transmitter 14 located on the main circulation loop 1-1.
Specifically, to ensure the accuracy of the detection, the conduit in which the conductivity transmitter 14 is located is connected in parallel with the deionization branch 1-2.
In order to remove impurities in the deionized water entering the cold plate 3 and avoid influencing the flow of the deionized water in the cold plate 3, the heat exchange efficiency is ensured, and the filter 6 is arranged on the water inlet side of the cold plate 3.
In this embodiment, the filter 6 is located at the water inlet side of the deionization branch 1-2, and can also remove impurities from the deionized water entering the deionization branch 1-2.
The water inlet side and the water outlet side of the cold plate 3 are respectively provided with a butterfly valve, a pressure transmitter and a temperature transmitter which are positioned on the main circulation loop 1-1.
In the embodiment, pipelines in which the butterfly valve, the pressure transmitter and the temperature transmitter are located are connected with the deionization branch 1-2 in parallel.
Specifically, the water inlet side of cold drawing 3 is established ties in proper order and is had butterfly valve I15, pressure transmitter I16 and temperature transmitter I17, and wherein, butterfly valve I15 is used for controlling the break-make that gets into the deionized water in the cold drawing 3, and pressure transmitter I16 is used for detecting the pressure value of the 3 water inlet side of cold drawing, and temperature transmitter I17 is used for detecting the temperature of the deionized water that gets into in the cold drawing 3.
The water outlet side of cold drawing 3 is established ties in proper order and is had butterfly valve II 18, temperature transmitter II 19 and pressure transmitter II 20, and wherein, butterfly valve II 18 is used for controlling the break-make from the interior exhaust deionized water of cold drawing 3, and pressure transmitter II 20 is used for detecting the pressure value of cold drawing 3 water outlet side, and temperature transmitter II 19 is used for detecting the temperature from the interior exhaust deionized water of cold drawing 3.
In order to discharge deionized water in the inner cooling side loop 1 or supplement deionized water to the inner cooling side loop 1, a drain pipeline 21 is arranged on the inner cooling side loop 1, and a drain valve 22 is arranged on the drain pipeline 21.
In the present embodiment, the drain line 21 is connected to the main circulation circuit 1-1.
In order to facilitate the evacuation of the gas from the circuit during the replenishment of deionized water, the circuit 1 on the inner cooling side is provided with a vent valve 23.
In the present embodiment, the exhaust valve 23 is installed on the main circulation circuit 1-1.
After the deionization tank 7 is used for a long time, a small amount of resin in the deionization tank is broken to form small particles to be mixed into deionized water, and a precision filter 24 positioned on a deionization branch 1-2 is arranged on the water outlet side of the deionization tank 7 in order to remove the resin particles in the deionized water.
The refrigeration side loop 2 is used for cooling the refrigerant working medium absorbing heat in the deionized water, and the compressor 8 is positioned on the water inlet side of the condenser 9.
A dry filter 25 and an electronic expansion valve 26 are connected in series in this order on the water outlet side of the condenser 9.
The arrangement of the dry filter 25 can remove moisture in the refrigeration working medium, and ensure the smooth and normal operation of the refrigeration side loop 2; the electronic expansion valve 26 can facilitate adjustment of the amount of refrigerant supply.
Preferably, the compressor 8 selects the inverter compressor, that is to say, the compressor 8 is connected with the compressor converter 27, and the condenser 9 selects the inverter condenser, that is to say, the condenser 9 is connected with the condenser fan converter 28, can debate according to the temperature of deionized water and the change of condensation temperature adjusts the rotational speed between them, reduces the energy consumption.
When the water chilling unit is operated for the first time, the inner cooling side loop 1 works at first, and the water pump 4 is started to circulate the heat exchange medium in the inner cooling side loop 1. Part of the heat exchange medium passes through the deionization branch circuit 1-2, and is mixed with the heat exchange medium in the main circulation loop 1-1 after the conductivity is reduced. After the water chilling unit operates for a certain time, the conductivity transmitter 14 detects that the conductivity of the heat exchange medium in the water chilling unit is reduced to be lower than a target value, the high-voltage grade insulation requirement of the direct-hanging energy storage system is met, and the usable signal of the water chilling unit is uploaded through the control system.
When the energy storage system has a refrigeration demand, the water pump 4 is started to enable the heat exchange medium to circularly flow, the heat of the battery pack is taken away from the cold plate 3, the heat is transferred to a refrigerant working medium in the refrigeration side loop 2 when passing through the evaporator 10, the temperature of the heat exchange medium in the inner cooling side loop 1 is reduced, and the low-temperature heat exchange medium enters the cold plate 3 again to cool the battery pack, so that the refrigeration cycle of the inner cooling side loop 1 is realized. The refrigerant working medium of the refrigeration side loop 2 absorbs heat of a heat exchange medium at the evaporator 10, evaporates from a liquid state to a gas state, is driven by the compressor 8, and transfers the heat from the evaporator 10 to the condenser 9, and the condenser 9 transfers the heat to the external environment through the heat exchange fan.
When the energy storage system has a heating requirement, the water pump 4 is started to enable the heat exchange medium to circularly flow, the heater 5 is started to heat the heat exchange medium, the high-temperature heat exchange medium enters the cold plate 3 to heat the cell stack 29, the return water temperature is reduced and then returns to the water pump 4, and the heating circulation of the inner cold side loop 1 is completed.
When the energy storage system does not have the refrigeration and heating requirements, the water pump 4 runs at low frequency through the water pump 4 frequency converter, so that the heat exchange medium continuously circulates, the conductivity is ensured to meet the running requirements of the energy storage system all the time, and the water chilling unit has the heat exchange capacity.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A water chilling unit for a direct-hanging energy storage system is characterized by comprising
The system comprises an internal cold side loop (1) and a system, wherein the internal cold side loop (1) comprises a main circulation loop (1-1) and a deionization branch (1-2), the main circulation loop (1-1) comprises a cold plate (3), a water pump (4), a heater (5) and a filter (6) which are connected in series, and the deionization branch (1-2) comprises a deionization tank (7) which is connected with the cold plate (3) in parallel;
a refrigeration-side circuit (2) that includes a compressor (8) and a condenser (9) connected in series, a dry filter (25), an electronic expansion valve (26), and an evaporator (10);
and the heat exchange medium in the inner cooling side loop (1) exchanges heat with the cell stack of the direct-hanging energy storage system when passing through the cold plate (3), and the heat exchange medium and the refrigerant working medium in the refrigeration side loop (2) exchange heat through the evaporator (10).
2. The water chilling unit for the direct-hanging energy storage system according to claim 1, wherein the water pump (4) is arranged on the water outlet side of the cold plate (3) and the deionization branch (1-2), and the water inlet side of the water pump (4) is provided with an air bag type expansion tank (11) on the main circulation loop (1-1).
3. The water chilling unit for the direct-hanging energy storage system according to claim 1, characterized in that a flow switch (13) on the main circulation loop (1-1) is arranged on the water inlet side of the cold plate (3).
4. The water chilling unit for the direct-hanging energy storage system according to claim 1, characterized in that the water inlet side of the cold plate (3) is provided with a conductivity transmitter (14) on the main circulation loop (1-1).
5. A water chilling unit for a direct-hanging energy storage system according to claim 1, characterized in that the filter (6) is arranged on the water inlet side of the cold plate (3).
6. The water chilling unit for the direct-hanging energy storage system according to claim 1, wherein the cold plate (3) is provided with a butterfly valve, a pressure transmitter and a temperature transmitter on the main circulation loop (1-1) at the water inlet side and the water outlet side respectively.
7. The water chilling unit for the direct-hanging energy storage system according to claim 1, wherein a drain pipeline (21) is arranged on the inner cold side loop (1), and a drain valve (22) is mounted on the drain pipeline (21).
8. Water chilling unit for a direct-hanging energy storage system according to claim 1, characterized in that the inner cold side loop (1) is provided with an exhaust valve (23).
9. The water chilling unit for the direct-hanging energy storage system according to claim 1, characterized in that a precision filter (24) on the deionization branch (1-2) is arranged on the water outlet side of the deionization tank (7).
10. The water chilling unit for the direct-hanging energy storage system according to claim 1, wherein the compressor (8) is located on a water inlet side of the condenser (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221420453.6U CN217823008U (en) | 2022-06-07 | 2022-06-07 | Water chilling unit for direct-hanging energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221420453.6U CN217823008U (en) | 2022-06-07 | 2022-06-07 | Water chilling unit for direct-hanging energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217823008U true CN217823008U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221420453.6U Active CN217823008U (en) | 2022-06-07 | 2022-06-07 | Water chilling unit for direct-hanging energy storage system |
Country Status (1)
| Country | Link |
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| CN (1) | CN217823008U (en) |
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2022
- 2022-06-07 CN CN202221420453.6U patent/CN217823008U/en active Active
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