Whole stack type energy storage heat management device and energy storage system

Abstract

The utility model provides a full stack type energy storage heat management device and an energy storage system. The full stack type energy storage heat management device comprises a first special cooling module installed in a cold circulation loop on the side of an energy storage converter group, a second special cooling module installed in a cold circulation loop on the side of a battery pack group, a shared cooling module shared between the side of the energy storage converter group and the side of the battery pack group, and a processing module. The shared cooling module is respectively connected to the energy storage converter group side cold circulation loop and the battery pack group side cold circulation loop through the first flow direction control module and the second flow direction control module; the first flow direction control module and the second flow direction control module are electrically connected with the processing module, and the processing module controls a cold circulation loop connected with the shared cooling module by controlling opening and closing of the first flow direction control module and the second flow direction control module. According to the scheme, the heat management flexibility of the energy storage system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage technology field especially, it is a full stack type energy storage heat management device and energy storage system. BACKGROUND

[0002] Containerized energy storage system (CESS) is a kind of highly integrated energy storage solution, it integrates key components such as battery pack group, energy storage converter PCS group, battery management system BMS, energy management system EMS in container. Since the working state of energy storage converter group and battery pack group is related to the ambient temperature of component, so there will be heat management system for the heat management of energy storage converter group and battery pack group in containerized energy storage system. Through the application of heat management system, energy storage converter group and battery pack group can operate in the optimum temperature range.

[0003] At present, the heat management system in the related art is mostly to manage the heat of battery pack group and energy storage converter group respectively, and the heat management system on the side of battery pack group and the heat management system on the side of energy storage converter group are in independent state, leading to poor heat management flexibility of energy storage system. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of full stack type energy storage heat management device and energy storage system to improve the heat management flexibility of energy storage system.

[0005] Firstly, the embodiment of the application provides a kind of full stack type energy storage heat management device, it is applied to energy storage system, and the energy storage system includes energy storage converter group and battery pack group, and the full stack type energy storage heat management device includes: first special cooling module installed in energy storage converter group side cold circulation loop, second special cooling module installed in battery pack group side cold circulation loop, shared cooling module shared by energy storage converter group side and battery pack group side and processing module;

[0006] The shared cooling module is respectively connected with energy storage converter group side cold circulation loop and battery pack group side cold circulation loop by first flow direction control module and second flow direction control module;

[0007] The first flow direction control module and the second flow direction control module are respectively electrically connected with the processing module, and the processing module controls the cold circulation loop accessed by the shared cooling module by controlling the opening and closing of the first flow direction control module and the second flow direction control module.

[0008] In the implementation process of the scheme, the shared cooling module is shared by the energy storage converter group side and the battery pack group side, and the processing module controls the opening and closing of the first flow direction control module and the second flow direction control module to control the cold circulation loop to which the shared cooling module is connected, so that the shared cooling module can be flexibly configured to the energy storage converter group side cold circulation loop and / or the battery pack group side cold circulation loop, thereby improving the thermal management flexibility of the energy storage system.

[0009] In an implementation form of the first aspect, the shared cooling module comprises: a first natural radiator and a first cooling fan.

[0010] The first natural radiator is connected to the first flow direction control module and the second flow direction control module through cooling liquid pipelines respectively.

[0011] The first cooling fan is electrically connected to the processing module.

[0012] In the implementation process of the scheme, the shared cooling module can adopt the natural radiator and cooling fan mode for heat dissipation, which on the one hand, is conducive to improving the response speed of the full-stack energy storage thermal management device, and on the other hand, is conducive to reducing the manufacturing cost and energy consumption of the full-stack energy storage thermal management device.

[0013] In an implementation form of the first aspect, the first dedicated cooling module comprises: a first electronic water pump, a second natural radiator and a second cooling fan.

[0014] The input end of the second natural radiator is connected to the output end of the first electronic water pump through a cooling liquid pipeline, and the output end is connected to the input end of the converter cold plate of the energy storage converter group through a cooling liquid pipeline.

[0015] The output end of the converter cold plate is connected to the input end of the first electronic water pump through a cooling liquid pipeline.

[0016] The second cooling fan is electrically connected to the processing module.

[0017] In the implementation process of the scheme, the first dedicated cooling module can adopt the natural radiator and cooling fan mode for heat dissipation, which on the one hand, is conducive to improving the response speed of the full-stack energy storage thermal management device, and on the other hand, is conducive to reducing the manufacturing cost and energy consumption of the full-stack energy storage thermal management device.

[0018] In an implementation form of the first aspect, the second dedicated cooling module comprises: a third cooling fan, a compressor, an air-cooled condenser, an electronic expansion valve and a plate heat exchanger.

[0019] The compressor, the air-cooled condenser, the electronic expansion valve and the plate heat exchanger are connected in series.

[0020] The third cooling fan, the compressor and the electronic expansion valve are electrically connected with the processing module respectively.

[0021] In the implementation process of the scheme, the battery pack group side can adopt compressor refrigeration, on the one hand, it is conducive to improving the response speed of the full-stack energy storage thermal management device to the rapid change of the temperature of the battery pack group; on the other hand, it can reduce the safety risk caused by battery overheating, and is conducive to improving the reliability of the energy storage system.

[0022] In an implementation form of the first aspect, the second special cooling module further includes: a first temperature sensor, a first pressure sensor, a second temperature sensor and a second pressure sensor;

[0023] The first temperature sensor and the first pressure sensor are arranged at the outlet of the plate heat exchanger respectively;

[0024] The second temperature sensor and the second pressure sensor are arranged at the outlet of the compressor respectively;

[0025] The first temperature sensor, the first pressure sensor, the second temperature sensor and the second pressure sensor are electrically connected with the processing module respectively.

[0026] In the implementation process of the scheme, the second special cooling module collects the temperature and pressure at the outlet of the plate heat exchanger and the temperature and pressure at the outlet of the compressor through the temperature sensor and the pressure sensor, so that the processing module can monitor the power consumption of the second special cooling module, on the one hand, it is conducive to improving the reliability of the full-stack energy storage thermal management device; on the other hand, the full-stack energy storage thermal management device can be applied to more application scenarios, which is conducive to improving the adaptability of the full-stack energy storage thermal management device.

[0027] In an implementation form of the first aspect, the device further includes: a dehumidification module, the dehumidification module is installed in the battery pack group side cold circulation loop; the dehumidification module is electrically connected with the processing module.

[0028] In the implementation process of the scheme, by setting the dehumidification module, the full-stack energy storage thermal management device can start the dehumidification module when the humidity of the cabin where the battery pack group is located is greater than the humidity threshold, so as to dehumidify, and the dehumidification function is conducive to maintaining the inside of the system at a suitable humidity, thereby improving the safety of the energy storage system.

[0029] In an implementation form of the first aspect, the dehumidification module includes: a second electronic water pump, a dehumidification radiator, a dehumidification fan and a dehumidification electric valve;

[0030] An output end of the second electronic water pump is connected to one end of the dehumidification electric valve through a cooling liquid pipeline.

[0031] The other end of the dehumidification electric valve is connected to an input end of the dehumidification radiator through a cooling liquid pipeline.

[0032] An output end of the dehumidification radiator is connected to an input end of the second electronic water pump.

[0033] The second electronic water pump, the dehumidification fan and the dehumidification electric valve are respectively electrically connected to the processing module.

[0034] In the implementation process of the above scheme, the battery pack group side is dehumidified by the dehumidification radiator and the dehumidification fan, which is beneficial to maintain the inside of the energy storage system at a suitable humidity, thereby improving the safety of the energy storage system; on the other hand, it is beneficial to reduce the manufacturing cost and energy consumption of the full-stack energy storage thermal management device.

[0035] In an implementation form of the first aspect, the device further comprises a heating module; the heating module is installed in the battery pack group side cold circulation loop; the heating module is electrically connected to the processing module.

[0036] In the implementation process of the above scheme, the battery pack group is heated by the heating module, which is beneficial to improve the reliability of the energy storage system on the one hand, and on the other hand, the energy storage system can be applied to more application scenarios, which is beneficial to improve the adaptability of the energy storage system.

[0037] In an implementation form of the first aspect, the heating module is a PTC heating unit.

[0038] In the implementation process of the above scheme, the heating module adopts the PTC heating unit, which makes the heating process of the heating module more stable, and is beneficial to improve the reliability of the full-stack energy storage thermal management device.

[0039] Secondly, the embodiments of the present application provide an energy storage system, which comprises an energy storage converter group, a battery pack group and a full-stack energy storage thermal management device, wherein the full-stack energy storage thermal management device is provided by the first aspect or any one of the possible implementation forms of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0041] Figure 1 The structural schematic diagram of the full-stack energy storage thermal management device provided by the embodiment of the present application is shown in the figure.

[0042] Figure 2 The structural schematic diagram of the full-stack energy storage thermal management device in some application scenarios provided by the embodiment of the present application is shown in the figure.

[0043] Figure 3 The running logic schematic diagram of the full-stack energy storage thermal management device in some application scenarios provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0046] It should be noted that: similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] In the description of the utility model, it needs to be explained that the terms "upper", "middle" and the like indicate the position or location relationship based on the position or location relationship shown in the drawings, or the position or location relationship when the utility model product is usually placed, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0049] Some embodiments of the utility model will be described in detail below in combination with the drawings. In the case of no conflict, the following examples and features in the examples can be combined with each other.

[0050] The energy storage converter group and the battery pack group are key components of the energy storage system, which will generate heat during operation. If effective thermal management is not performed, it may cause problems such as performance degradation and shortened life of the components, and even safety accidents. The thermal management system can adjust the temperature of components such as the energy storage converter group and the battery pack group during the operation of the energy storage system, so that each component can work efficiently at an appropriate temperature.

[0051] The related art usually designs the battery side and the energy storage converter side as two independent thermal management systems, and the two independent thermal management systems each have an independent cooling circuit and do not interfere with each other. However, this independent design method cannot obtain the cold compensation of the other side when the cold of one side is insufficient, or cannot compensate for the cold of the other side when the cold of one side is sufficient, resulting in poor flexibility of the thermal management of the energy storage system.

[0052] Therefore, based on this, the embodiment of the present application provides a full-stack energy storage thermal management device, which is provided with a shared cooling module shared between the energy storage converter group side and the battery pack group side, and the processing module controls the opening and closing of the first flow direction control module and the second flow direction control module to control the cold circulation circuit connected to the shared cooling module, so that the shared cooling module can be flexibly configured to the energy storage converter group side cold circulation circuit and / or the battery pack group side cold circulation circuit, which is beneficial to improve the flexibility of the thermal management of the energy storage system.

[0053] The full-stack energy storage thermal management device is described in detail below. Please refer to Figure 1 The embodiment of the present application provides a full-stack energy storage thermal management device 100 applied to an energy storage system 200, wherein the energy storage system 200 comprises an energy storage converter group 210 and a battery pack group 220, and the full-stack energy storage thermal management device 100 comprises: a first dedicated cooling module 110 installed in a cold circulation loop on the energy storage converter group side, a second dedicated cooling module 120 installed in a cold circulation loop on the battery pack group side, a shared cooling module 130 shared by the energy storage converter group side and the battery pack group side, a first flow direction control module 140, a second flow direction control module 150 and a processing module 160.

[0054] The shared cooling module 130 is connected to the cold circulation loop on the energy storage converter group side and the cold circulation loop on the battery pack group side through the first flow direction control module 140 and the second flow direction control module 150 respectively.

[0055] The first flow direction control module 140 and the second flow direction control module 150 are electrically connected to the processing module 160, and the processing module 160 controls the opening and closing of the first flow direction control module 140 and the second flow direction control module 150 to control the cold circulation loop connected to the shared cooling module 130.

[0056] For example, the first flow direction control module 140 and the second flow direction control module 150 can comprise electric valves, and the processing module 160 can control the opening and closing of the electric valves to control the cold circulation loop connected to the shared cooling module.

[0057] For example, the number of the shared cooling module 130 can be one or more, and the shared cooling module 130 can be a cooling module such as an air cooling module, a liquid cooling module or a compressor cooling module. In addition, when the full-stack energy storage thermal management device 100 is provided with multiple shared cooling modules 130, multiple types of cooling modules can be provided, for example, in a certain scenario, the full-stack energy storage thermal management device 100 is provided with three shared cooling modules 130, including one air cooling module, one liquid cooling module and one compressor cooling module.

[0058] It can be understood that the above-mentioned shared cooling module 130 can be connected to the PCS side cold circulation loop (energy storage inverter group side cold circulation loop) and the PACK side cold circulation loop (battery pack group side cold circulation loop) alone, and can also be connected to the PCS side cold circulation loop and the PACK side cold circulation loop at the same time. Taking the full-stack energy storage thermal management device 100 including only one shared cooling module 130 as an example, if the shared cooling module 130 is connected to the PCS side cold circulation loop and the PACK side cold circulation loop at the same time, the cold circulation path can be a series cold circulation loop, for example: energy storage inverter group 210→shared cooling module 130→battery pack group 220→energy storage inverter group 210; the cold circulation loop can also be a parallel cold circulation loop, for example: energy storage inverter group 210→shared cooling module 130→energy storage inverter group 210, battery pack group 220→shared cooling module 130→battery pack group 220. The specific cold circulation loop can be set according to the specific application scenario, and the embodiments of the present application will not be described again.

[0059] In addition, it can be understood that taking the full-stack energy storage thermal management device 100 including only one shared cooling module 130 as an example, the case that the shared cooling module 130 is connected to the energy storage inverter group side and the battery pack group side at the same time includes:

[0060] (1) The temperature control requirements of the energy storage inverter group side and the battery pack group side are the same, and the shared cooling module 130 can provide sufficient cold energy for the energy storage inverter group side and the battery pack group side;

[0061] (2) The temperature control requirements of the energy storage inverter group side and the battery pack group side are different, but the shared cooling module 130 can provide sufficient cold energy for the energy storage inverter group side and the battery pack group side.

[0062] The following describes an optional embodiment of the above-mentioned shared cooling module 130:

[0063] As an optional embodiment of the above-mentioned full-stack energy storage thermal management device, the above-mentioned shared cooling module 130 can include: a first natural radiator 131 and a first cooling fan 132; the first natural radiator 131 is connected to the first flow direction control module 140 and the second flow direction control module 150 through the cooling liquid pipeline respectively; the first cooling fan 132 is electrically connected with the processing module 160.

[0064] For example, the above-mentioned first cooling fan 132 can face the first natural radiator 131, and of course, a series layout of the radiator and the cooling fan can also be adopted. The specific arrangement mode can be selected according to the application scenario, and the embodiments of the present application will not be described again.

[0065] The shared cooling module 130 in the above scheme can adopt a natural radiator combined with a cooling fan to dissipate heat, which on the one hand is conducive to improving the response speed of the full-stack energy storage thermal management device 100, and on the other hand is conducive to reducing the manufacturing cost and energy consumption of the full-stack energy storage thermal management device 100.

[0066] Next, an optional embodiment of the first dedicated cooling module 110 is introduced as follows:

[0067] As an optional embodiment of the full-stack energy storage thermal management device, the first dedicated cooling module 110 includes a first electronic water pump 111, a second natural radiator 112, and a second cooling fan 113. The input end of the second natural radiator 112 is connected to the output end of the first electronic water pump 111 through a cooling liquid pipeline, and the output end is connected to the input end of the converter cold plate of the energy storage converter group 210 through a cooling liquid pipeline; the output end of the converter cold plate is connected to the input end of the first electronic water pump 111 through a cooling liquid pipeline; and the second cooling fan 113 is electrically connected to the processing module 160.

[0068] It can be understood that the first electronic water pump 111 is used to realize the flow of the cooling liquid in the PCS side cooling circulation loop.

[0069] The main function of the converter cold plate is to transfer heat from the energy storage converter to the cooling liquid.

[0070] The first dedicated cooling module 110 in the above scheme can adopt a natural radiator combined with a cooling fan to dissipate heat, which on the one hand is conducive to improving the response speed of the full-stack energy storage thermal management device 100, and on the other hand is conducive to reducing the manufacturing cost and energy consumption of the full-stack energy storage thermal management device.

[0071] Next, an optional embodiment of the second dedicated cooling module 120 is introduced as follows:

[0072] As an optional embodiment of the full-stack energy storage thermal management device, the second dedicated cooling module 120 includes a third cooling fan 121, a compressor 122, an air-cooled condenser 123, an electronic expansion valve 124, and a plate heat exchanger 125, which are connected in series; and the third cooling fan 121, the compressor 122, the electronic expansion valve 124, and the plate heat exchanger 125 are electrically connected to the processing module 160.

[0073] It can be understood that the third cooling fan 121, the compressor 122, and the electronic expansion valve 124 are electrically connected to the processing module 160, so that the processing module 160 can control the start-stop of the third cooling fan 121 and the compressor 122 and the opening and closing of the electronic expansion valve 124.

[0074] The battery pack group side in the above scheme can adopt compressor refrigeration, on the one hand, it is beneficial to improve the response speed of the full-stack energy storage thermal management device 100 to the temperature rapid change of the battery pack group 220; on the other hand, it can reduce the safety risk caused by battery overheating, and is beneficial to improve the reliability of the energy storage system 200.

[0075] As an optional implementation of the full-stack energy storage thermal management device, the second special cooling module 120 further comprises: a first temperature sensor 126, a first pressure sensor 127, a second temperature sensor 128 and a second pressure sensor 129;

[0076] The first temperature sensor 126 and the first pressure sensor 127 are respectively arranged at the outlet of the plate heat exchanger 125;

[0077] The second temperature sensor 128 and the second pressure sensor 129 are respectively arranged at the outlet of the compressor 122;

[0078] The first temperature sensor 126, the first pressure sensor 127, the second temperature sensor 128 and the second pressure sensor 129 are respectively electrically connected with the processing module 160.

[0079] It can be understood that the first temperature sensor 126 and the first pressure sensor 127 are respectively used to collect the temperature and pressure of the outlet of the plate heat exchanger 125 and send them to the processing module 160, and the second temperature sensor 128 and the second pressure sensor 129 are respectively used to collect the temperature and pressure of the outlet of the compressor 122 and send them to the processing module 160, and the processing module 160 can monitor the compressor cooling energy consumption of the second special cooling module 120 based on the temperature and pressure of the outlet of the plate heat exchanger 125 and the temperature and pressure of the outlet of the compressor 122.

[0080] In the implementation process of the above scheme, the second special cooling module 120 collects the temperature and pressure of the outlet of the plate heat exchanger 125 and the temperature and pressure of the outlet of the compressor 122 through the temperature sensor and the pressure sensor, so that the processing module 160 can monitor the power consumption of the second special cooling module 120, on the one hand, it is beneficial to improve the reliability of the full-stack energy storage thermal management device 100; on the other hand, the full-stack energy storage thermal management device 100 can be applied to more application scenarios, which is beneficial to improve the adaptability of the full-stack energy storage thermal management device 100.

[0081] The dehumidification function of the full-stack energy storage thermal management device 100 is introduced as follows:

[0082] As an optional implementation of the full-stack energy storage thermal management device, the full-stack energy storage thermal management device 100 further comprises a dehumidification module 170; the dehumidification module 170 is installed in the battery pack group side cold circulation loop. The dehumidification module 170 is electrically connected with the processing module 160.

[0083] It can be understood that the processing module 160 can monitor the humidity of the cabin where the battery pack group 220 is located in the energy storage system 200 through the humidity sensor. When the humidity is greater than the humidity threshold, the dehumidification module is started to reduce the environmental humidity to a humidity value not greater than the humidity threshold.

[0084] The above scheme sets the dehumidification module, so that the full-stack energy storage thermal management device 100 can start the dehumidification module when the humidity of the cabin where the battery pack group is located is greater than the humidity threshold, thereby dehumidifying. The dehumidification function is conducive to maintaining the system inside at a suitable humidity, thereby improving the safety of the energy storage system.

[0085] Next, an optional implementation of the dehumidification module 170 is introduced:

[0086] As an optional implementation of the full-stack energy storage thermal management device, the dehumidification module 170 comprises a second electronic water pump 171, a dehumidification radiator 172, a dehumidification fan 173 and a dehumidification electric valve 174; the output end of the second electronic water pump 171 is connected with one end of the dehumidification electric valve 174 through a cooling liquid pipeline; the other end of the dehumidification electric valve 174 is connected with the input end of the dehumidification radiator 172 through a cooling liquid pipeline; the output end of the dehumidification radiator 172 is connected with the input end of the second electronic water pump 171. The second electronic water pump 171, the dehumidification fan 173 and the dehumidification electric valve 174 are electrically connected with the processing module 160 respectively.

[0087] It can be understood that when the humidity is greater than the preset humidity threshold, the processing module 160 can start the dehumidification electric valve 174 and the dehumidification fan 173, the return air flows through the dehumidification radiator 172 to complete dehumidification, and the supply air is supplied to the cabin where the battery pack group 220 is located. Air circulation is formed in the cabin where the battery pack group 220 is located to achieve the effect of dehumidification.

[0088] In addition, it can be understood that the dehumidification module 170 can directly use the low-temperature cooling liquid of the battery pack group side for dehumidification, which eliminates the traditional compressor dehumidification module, so that the full-stack energy storage thermal management device 100 is more economical and efficient.

[0089] The above scheme dehumidifies the battery pack group side through the dehumidification radiator 172 and the dehumidification fan 173. On the one hand, it is conducive to maintaining the inside of the energy storage system 200 at a suitable humidity, thereby improving the safety of the energy storage system; on the other hand, it is conducive to reducing the manufacturing cost and energy consumption of the full-stack energy storage thermal management device 100.

[0090] The heating function of the full-stack energy storage thermal management device 100 is described as follows:

[0091] As an optional implementation of the full-stack energy storage thermal management device, the full-stack energy storage thermal management device 100 further comprises a heating module 180, which is installed in the battery pack group side cold circulation loop; the heating module 180 is electrically connected with the processing module 160.

[0092] It can be understood that the processing module 160 can monitor the starting mode of the battery pack group and parameters such as ambient temperature and cell temperature, and control the heating module 180 to start when the heating condition is met. The heating condition is, for example, that the battery pack group 220 starts statically in a low-temperature environment, and the cell temperature is not greater than 10℃.

[0093] For example, the heating module 180 can be a heating module of types such as resistance heating, infrared heating, and electromagnetic heating.

[0094] The above scheme sets the heating module 180 to heat the battery pack group 220, which on the one hand enables the battery pack group 220 to work in an optimal temperature range, and is beneficial to improve the reliability of the energy storage system 200; on the other hand, enables the energy storage system 200 to be applied to more application scenarios, and is beneficial to improve the adaptability of the energy storage system 200.

[0095] An optional implementation of the heating module 180 is described as follows:

[0096] As an optional implementation of the full-stack energy storage thermal management device, the heating module 180 can be a PTC heating unit.

[0097] The PTC heating unit is a heating element made of a material with a positive temperature coefficient. When the PTC heating unit is powered on, it will start to heat up. As the temperature rises, the resistance of the PTC material increases, and the difficulty of current passing increases, thereby limiting the increase of power. When a certain specific temperature is reached, the power of the PTC heating unit stabilizes at a relatively constant level.

[0098] In the implementation process of the above scheme, the heating module 180 adopts the PTC heating unit, which makes the heating process of the heating module 180 more stable, and is beneficial to improve the reliability of the full-stack energy storage thermal management device 100.

[0099] A specific application scenario is provided below to describe the working principle of the full-stack energy storage thermal management device 100 in detail:

[0100] Please refer to Figure 2The application scenario includes the full-stack energy storage thermal management device 100, the full-stack energy storage thermal management device 100 includes:

[0101] A shared cooling module 130, the cooling module includes: a first natural radiator 131 and a first cooling fan 132; the first natural radiator 131 is connected with the first flow direction control module 140 and the second flow direction control module 150 through the cooling liquid pipeline respectively; the first cooling fan 132 can assist the first natural radiator 131 to dissipate heat;

[0102] A first dedicated cooling module 110, the module includes: a first electronic water pump 111, a second natural radiator 112 and a second cooling fan 113, the input end of the second natural radiator 112 is connected with the output end of the first electronic water pump 111 through the cooling liquid pipeline, and the output end is connected with the input end of the converter cold plate of the energy storage converter group 210 through the cooling liquid pipeline; the output end of the converter cold plate is connected with the input end of the first electronic water pump 111 through the cooling liquid pipeline; the second cooling fan 113 is electrically connected with the processing module 160;

[0103] A second dedicated cooling module 120, including: a third cooling fan 121, a compressor 122, an air-cooled condenser 123, an electronic expansion valve 124 and a plate heat exchanger 125, the compressor 122, the air-cooled condenser 123, the electronic expansion valve 124 and the plate heat exchanger 125 are connected in series; the third cooling fan 121, the compressor 122, the electronic expansion valve 124 are electrically connected with the processing module 160 respectively;

[0104] A dehumidification module 170 installed in the battery pack group side cold circulation loop, including: a second electronic water pump 171, a dehumidification radiator 172, a dehumidification fan 173 and a dehumidification electric valve 174; the output end of the second electronic water pump 171 is connected with one end of the dehumidification electric valve 174 through the cooling liquid pipeline; the other end of the dehumidification electric valve 174 is connected with the input end of the dehumidification radiator 172 through the cooling liquid pipeline; the output end of the dehumidification radiator 172 is connected with the input end of the second electronic water pump 171. The second electronic water pump 171, the dehumidification fan 173 and the dehumidification electric valve 174 are electrically connected with the processing module 160 respectively;

[0105] A heating module 180 installed in the battery pack group side cold circulation loop, the heating module 180 can adopt a PTC heating unit;

[0106] The above-mentioned PTC heating unit can cooperate with the plate heat exchanger 125 in the second dedicated cooling module 120 to heat, and the plate heat exchanger 125 can increase the heat exchange area, so as to more effectively transfer heat;

[0107] The first flow direction control module 140 includes: a first electric two-way ball valve 141 and a second electric two-way ball valve 142;

[0108] The second flow direction control module 150 comprises an electric three-way regulating valve 151 and a third electric two-way ball valve 152.

[0109] Firstly, the six working modes of the full-stack energy storage thermal management device 100 are introduced:

[0110] Working mode one (Model 1): the energy storage inverter group side and the battery pack group side are both cooled by natural cooling, and the running state is as follows:

[0111] (1) Energy storage inverter group side: the first electric two-way ball valve 141 and the second electric two-way ball valve 142 are powered off and closed, and the second natural radiator 112 provides cooling capacity to meet the PCS side cooling demand;

[0112] It can be understood that the internal temperature of the energy storage inverter group 210 can be monitored, and if the internal temperature of the energy storage inverter group 210 is greater than the set value , the second cooling fan 113 is started, and when the internal temperature of the energy storage inverter group 210 is not greater than the set value , only the second natural radiator 112 can be used for cooling;

[0113] At this time, the energy storage inverter group side uses the first dedicated cooling module 110 for cooling.

[0114] (2) Battery pack group side: the electric three-way regulating valve 151 is actuated, and the cooling liquid flows to the first natural radiator 131 at 100%, and the third electric two-way ball valve 152 is powered on, and the first natural radiator 131 and the first cooling fan 132 provide cooling capacity;

[0115] At this time, the battery pack group side uses the shared cooling module 130 for cooling.

[0116] Working mode two (Model 2): the energy storage inverter group side is cooled by natural cooling, and the battery pack group side is cooled by natural cooling and compressor refrigeration, and the running state is as follows:

[0117] (1) Energy storage inverter group side: the first electric two-way ball valve 141 and the second electric two-way ball valve 142 are powered off and closed, and the second natural radiator 112 and the second cooling fan 113 provide cooling capacity;

[0118] At this time, the energy storage inverter group side uses the first dedicated cooling module 110 for cooling.

[0119] (2) Battery pack group side: the electric three-way regulating valve 151 is actuated, and the cooling liquid partially flows to the first natural radiator 131, and the other part flows to the plate heat exchanger 125, and the third electric two-way ball valve 152 is powered on, and the first natural radiator 131 and the plate heat exchanger 125 provide cooling capacity at the same time;

[0120] In this working mode, the first natural radiator 131 works at full load priority, and the insufficient cooling capacity is compensated by compressor refrigeration;

[0121] In addition, the power consumption during compressor refrigeration can be monitored through the first temperature sensor 126, the first pressure sensor 127, the second temperature sensor 128, and the second pressure sensor 129.

[0122] At this time, the battery pack group side uses the shared cooling module 130 and the second dedicated cooling module 120 for heat dissipation.

[0123] Working mode three (Model 3): The energy storage inverter group side is cooled by natural heat dissipation, and the battery pack group side is cooled by compressor refrigeration, and the running state is as follows:

[0124] (1) Energy storage inverter group side: the first electric two-way ball valve 141 and the second electric two-way ball valve 142 are powered off and closed, and the second natural radiator 112 and the second cooling fan 113 provide cooling capacity;

[0125] At this time, the energy storage inverter group side uses the first dedicated cooling module 110 for heat dissipation.

[0126] (2) Battery pack group side: the electric three-way regulating valve 151 is actuated, and the cooling liquid 100% flows to the plate heat exchanger 125, the third electric two-way ball valve 152 is powered off and closed, and the cooling capacity is provided by compressor refrigeration;

[0127] In addition, the power consumption during compressor refrigeration can be monitored through the first temperature sensor 126, the first pressure sensor 127, the second temperature sensor 128, and the second pressure sensor 129.

[0128] At this time, the battery pack group side uses the second dedicated cooling module 120 for heat dissipation.

[0129] Working mode four (Model 4): The energy storage inverter group side is cooled by natural heat dissipation, and the battery pack group side is cooled by compressor refrigeration, and the running state is as follows:

[0130] (1) Energy storage inverter group side: the first electric two-way ball valve 141 and the second electric two-way ball valve 142 are powered on and opened, and the first natural radiator 131 and the first cooling fan 132 jointly provide cooling capacity;

[0131] At this time, the energy storage inverter group side uses the first dedicated cooling module 110 and the shared cooling module 130 for heat dissipation.

[0132] (2) Battery pack group side: The electric three-way regulating valve 151 is actuated, the cooling liquid 100% flows to the plate heat exchanger 125, the third electric two-way ball valve 152 is powered off and closed, and the cold quantity is provided by the compressor refrigeration;

[0133] In addition, the power consumption during the compressor refrigeration can be monitored by the first temperature sensor 126, the first pressure sensor 127, the second temperature sensor 128, and the second pressure sensor 129;

[0134] At this time, the battery pack group side uses the second special cooling module 120 for heat dissipation.

[0135] Working mode five (dehumidification mode):

[0136] The humidity of the cabin where the battery pack group 220 is located is monitored, when the humidity is greater than the preset humidity threshold, the dehumidification electric valve 174 and the dehumidification fan 173 are opened, the return air flows through the dehumidification radiator 172 to complete dehumidification, and the supply air is supplied to the cabin where the battery pack group is located, forming an air circulation in the cabin where the battery pack group is located to achieve the dehumidification effect.

[0137] This function directly uses the low-temperature cooling liquid of the battery pack group side for dehumidification, which saves the traditional compressor dehumidification module, and makes the above-mentioned full-stack energy storage thermal management device 100 more economical and efficient.

[0138] Working mode six (heating mode):

[0139] If the battery pack group 220 is started in a low-temperature environment, and the cell temperature is not greater than 10℃, the heating module 180 and the second electronic water pump 171 are opened.

[0140] Please refer to Figure 3 , the working principle of the above-mentioned full-stack energy storage thermal management device 100 will be introduced as follows:

[0141] (1) When the running time of the energy storage system 200 is , the corresponding working mode is selected based on the environment temperature;

[0142] The scheme of selecting the corresponding working mode based on the environment temperature is as follows:

[0143] When the running time of the energy storage system 200 is , the above-mentioned Model 1 is adopted;

[0144] When the running time of the energy storage system 200 is , the above-mentioned Model 2 is adopted;

[0145] When the running time of the energy storage system 200 is , the above-mentioned Model 3 is adopted;

[0146] When the running time of the energy storage system 200 is , the above-mentioned Model 4 is adopted.

[0147] (2) The start-up and running time of the energy storage system 200 At the same time, the operating mode is selected by taking into account both the ambient temperature and the heating power of the battery cell:

[0148] When the cell heating power At that time, the corresponding working mode is selected based on the ambient temperature;

[0149] When the cell heating power hour:

[0150] 1. Ambient temperature At that time, according to the battery pack at Power duration within the range Select your work mode:

[0151] At that time, the corresponding working mode is selected based on the ambient temperature;

[0152] At that time, the working mode will be directly set to the above-mentioned Model 2;

[0153] 2. Ambient temperature At that time, according to the battery pack at Power duration within the range Select your work mode:

[0154] At that time, the working mode will be directly set to the above-mentioned Model 2;

[0155] At that time, the working mode will be directly set to the aforementioned Model 3.

[0156] When the cell heating power hour:

[0157] 1. Ambient temperature At that time, according to the battery pack at Power duration within the range Select your work mode:

[0158] At that time, the corresponding working mode is selected based on the ambient temperature;

[0159] At that time, the working mode will be directly set to the above-mentioned Model 2;

[0160] At that time, the working mode will be directly set to the aforementioned Model 3;

[0161] 2. Ambient temperature At that time, according to the battery pack at power duration in the range to select the operation mode:

[0162] when, directly determine the operation mode as Model 3 described above;

[0163] when, directly determine the operation mode as Model 4 described above.

[0164] It can be understood that the processing module 160 can control the working state of the first dedicated cooling module 110, the second dedicated cooling module 120 and the shared cooling module 130 in the full-stack energy storage thermal management device 100 based on the running logic described above.

[0165] For example, the processing module 160 can obtain the temperature inside the energy storage system 200 based on the temperature sensor.

[0166] For example, the processing module 160 can obtain the cell heat power of the battery pack group 220 in the following way:

[0167] (1) The cell heat power can be calculated by measuring the discharge current and voltage of the battery pack through a certain algorithm;

[0168] (2) The cell heat power can be estimated by monitoring the battery surface temperature through devices such as thermal imaging cameras, temperature sensors, etc.;

[0169] (3) The current data, voltage data and temperature data of the battery can be obtained by accessing the battery management system (BMS), and these data can be processed through a certain algorithm to estimate the cell heat power.

[0170] It can be understood that the way to obtain the cell heat power can adopt a relatively mature technology in the related art, and the cell heat power of the battery pack group 220 can be obtained, and the present application embodiment will not be repeated.

[0171] Based on the same inventive concept, the present application embodiment also provides an energy storage system 200, which comprises an energy storage converter group 210, a battery pack group 220 and a full-stack energy storage thermal management device 100, wherein the full-stack energy storage thermal management device 100 is any one of the full-stack energy storage thermal management devices 100 described above.

[0172] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A full stack energy storage thermal management device, characterized by, The application is applied to an energy storage system, the energy storage system comprises an energy storage converter group and a battery pack group, and the full-stack energy storage thermal management device comprises: a first special cooling module installed in a cold circulation loop on the energy storage converter group side, a second special cooling module installed in a cold circulation loop on the battery pack group side, a shared cooling module shared between the energy storage converter group side and the battery pack group side, a first flow direction control module, a second flow direction control module and a processing module; The shared cooling module is connected to the cold circulation loop on the energy storage converter group side and the cold circulation loop on the battery pack group side through the first flow direction control module and the second flow direction control module respectively; The first flow direction control module and the second flow direction control module are electrically connected to the processing module respectively, and the processing module controls the cold circulation loop connected to the shared cooling module by controlling the opening and closing of the first flow direction control module and the second flow direction control module.

2. The all stacked energy storage thermal management device of claim 1, wherein, The shared cooling module comprises a first natural radiator and a first cooling fan; The first natural radiator is connected to the first flow direction control module and the second flow direction control module through a cooling liquid pipeline respectively; The first cooling fan is electrically connected to the processing module.

3. The all stacked energy storage thermal management device of claim 1, wherein, The first special cooling module comprises a first electronic water pump, a second natural radiator and a second cooling fan; The input end of the second natural radiator is connected to the output end of the first electronic water pump through a cooling liquid pipeline, and the output end is connected to the input end of a converter cold plate of the energy storage converter group through a cooling liquid pipeline; The output end of the converter cold plate is connected to the input end of the first electronic water pump through a cooling liquid pipeline; The second cooling fan is electrically connected to the processing module.

4. The all stacked energy storage thermal management device of claim 1, wherein, The second special cooling module comprises a third cooling fan, a compressor, an air-cooled condenser, an electronic expansion valve and a plate heat exchanger; The compressor, the air-cooled condenser, the electronic expansion valve and the plate heat exchanger are connected in series; The third cooling fan, the compressor and the electronic expansion valve are electrically connected to the processing module respectively.

5. The full stack energy storage thermal management device of claim 4, wherein, The second special cooling module further comprises a first temperature sensor, a first pressure sensor, a second temperature sensor and a second pressure sensor; The first temperature sensor and the first pressure sensor are arranged at the outlet of the plate heat exchanger respectively; The second temperature sensor and the second pressure sensor are arranged at the outlet of the compressor respectively; The first temperature sensor, the first pressure sensor, the second temperature sensor and the second pressure sensor are electrically connected to the processing module respectively.

6. The full-stack thermal energy storage management device according to any one of claims 1-5, wherein, The device further comprises a dehumidification module installed in the cold circulation loop on the battery pack group side; and the dehumidification module is electrically connected to the processing module.

7. The full-stack energy storage thermal management device of claim 6, wherein, The dehumidification module comprises a second electronic water pump, a dehumidification radiator, a dehumidification fan and a dehumidification electric valve; The output end of the second electronic water pump is connected to one end of the dehumidification electric valve through a cooling liquid pipeline; The other end of the dehumidification electric valve is connected to the input end of the dehumidification radiator through a cooling liquid pipeline; The output end of the dehumidification radiator is connected to the input end of the second electronic water pump; The second electronic water pump, the dehumidification fan and the dehumidification electric valve are respectively electrically connected with the processing module.

8. The all-stack energy storage thermal management device of any one of claims 1-5, wherein, The device further comprises a heating module; the heating module is installed in the battery pack group side cold circulation loop; the heating module is electrically connected with the processing module.

9. The full-stack energy storage thermal management device of claim 8, wherein, The heating module is a PTC heating unit.

10. An energy storage system characterized by, The energy storage system comprises an energy storage converter group, a battery pack group and a full-stack energy storage thermal management device, wherein the full-stack energy storage thermal management device is the full-stack energy storage thermal management device according to any one of claims 1-9.

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