Energy storage thermal management system, thermal management method and energy storage equipment

Abstract

The invention discloses an energy storage heat management system, a heat management method and energy storage equipment. A heat dissipation assembly; the heat dissipation pipeline is provided with a two-way valve, a three-way valve and a water pump, and the three-way valve, the two-way valve, the water pump, the cooling pipeline and the heat dissipation assembly form a double-module forced cooling circulation loop, a double-module natural cooling loop, a double-mode cooling loop and a waste heat recycling loop which can be alternately connected and disconnected; the control module is used for adjusting the working states of the two-way valve, the three-way valve, the water pump and the compressor refrigeration assembly according to at least one of the environment temperature, the battery management request data, the first water inlet and outlet temperature and the second water inlet and outlet temperature so as to configure the heat management mode of the battery module and the energy storage conversion module. Heat management loop control and switching among different heat management modes are achieved through the two-way valve and the three-way valve, the pipeline structure and the control mode are simple, the system reliability is high, and the energy utilization rate is high.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage thermal management, and in particular to an energy storage thermal management system, a thermal management method and an energy storage device. Background Art

[0002] Energy storage liquid cooling unit is a device that removes heat from the battery through the circulation of coolant in the evaporator to achieve temperature control. With the continuous improvement of the requirements for temperature uniformity and reliability of energy storage equipment (especially in high temperature and high altitude areas), the demand for liquid cooling of energy storage converters (Power Conversion System, PCS for short) has increased.

[0003] In the existing energy storage liquid cooling unit design, independent refrigeration systems are usually configured for the battery pack and the energy storage inverter, or a dual-circulation liquid cooling method is used to simultaneously realize battery pack liquid cooling and PCS liquid cooling. The existing technology has the following problems: in the independent refrigeration system, two completely independent sets of pipelines and refrigerators need to be configured, the energy utilization rate is low, and the system cost is increased; in the dual-circulation liquid cooling method, in order to achieve the decoupling between the battery pack liquid cooling circuit and the PCS liquid cooling circuit, a four-way valve connection structure is usually required, the pipeline structure is complex, the cost is high, and the existing four-way valve structure is difficult to meet the large flow requirements. Summary of the invention

[0004] The present invention provides an energy storage thermal management system, a thermal management method and an energy storage device, which realize thermal management loop control and switching between different thermal management modes through a two-way valve and a three-way valve, and can solve the problems of complex piping structure, low energy utilization and high cost of existing energy storage liquid cooling units.

[0005] According to one aspect of the present invention, there is provided an energy storage thermal management system for thermally managing a battery module and an energy storage inverter module, the thermal management system comprising: a compressor refrigeration assembly, provided with a circulation pipeline and a cooling pipeline; a heat dissipation assembly; a heat dissipation pipeline, provided with a two-way valve, a three-way valve and a water pump, the three-way valve, the two-way valve, the water pump, the cooling pipeline and the heat dissipation assembly are interconnected to form a dual-module strong cooling circulation loop, a dual-module natural cooling loop, a dual-mode cooling loop and a waste heat recycling loop that can be alternately turned on and off; a control module, for obtaining ambient temperature, battery management request data, a first inlet and outlet water temperature of the battery module and a second inlet and outlet water temperature of the energy storage inverter module, and adjusting the working states of the two-way valve, the three-way valve, the water pump and the compressor refrigeration assembly according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperature and the second inlet and outlet water temperature to configure the thermal management mode of the battery module and the energy storage inverter module.

[0006] Optionally, the two-way valve includes a first two-way valve, a second two-way valve, a third two-way valve and a fourth two-way valve; the three-way valve includes a first three-way valve; the water pump includes a first water pump and a second water pump; wherein the first end of the first water pump is connected to the first end of the heat dissipation component via the first two-way valve, the first end of the first water pump is also connected to the water inlet of the cooling pipeline via the second two-way valve, the second end of the first water pump is connected to the heat dissipation outlet of the battery module and the heat dissipation outlet of the energy storage converter module via the first three-way valve, and the The water outlet of the cooling pipeline is connected to the heat dissipation water inlet of the battery module, and the water outlet of the cooling pipeline is also connected to the heat dissipation water inlet of the energy storage inverter module via the third two-way valve; the first end of the second water pump is connected to the first end of the heat dissipation component via the fourth two-way valve, and the second end of the second water pump is connected to the heat dissipation water outlet of the energy storage inverter module; the second end of the heat dissipation component is connected to the heat dissipation water inlet of the battery module via the third two-way valve, and the second end of the heat dissipation component is also connected to the heat dissipation water inlet of the energy storage inverter module.

[0007] Optionally, the control module is configured to: when the dual-module forced cooling circulation loop participates in thermal management, control the first water pump and the compressor refrigeration component to start, control the second water pump to shut down, control the first two-way valve and the fourth two-way valve to close, and control the second two-way valve and the third two-way valve to conduct; when the dual-module natural cooling loop participates in thermal management, control the first water pump to start, control the compressor refrigeration component and the second water pump to shut down, control the first two-way valve and the third two-way valve to conduct, and control the second two-way valve and the fourth two-way valve to shut down; when the dual-mode cooling loop participates in thermal management, control the first water pump, the second water pump and the compressor refrigeration component to start, control the second two-way valve and the fourth two-way valve to conduct, and control the first two-way valve and the third two-way valve to shut down; when the waste heat recycling loop participates in thermal management, control the first water pump to start, control the second water pump and the compressor refrigeration component to shut down, control the second two-way valve and the third two-way valve to conduct, and control the first two-way valve and the fourth two-way valve to shut down.

[0008] Optionally, the first three-way valve is a flow-adjustable three-way valve; the control module is configured to: when the dual-module forced cooling circulation circuit, the dual-module natural cooling circuit or the waste heat recycling circuit participates in thermal management, adjust the flow distribution of the first three-way valve according to the first inlet and outlet water temperature and the second inlet and outlet water temperature; and / or, when the dual-mode cooling circuit participates in thermal management, control the first three-way valve to shut off the passage to the energy storage conversion module.

[0009] Optionally, the two-way valve includes a fifth two-way valve and a sixth two-way valve; the water pump includes a third water pump and a fourth water pump; the three-way valve includes a second three-way valve and a third three-way valve; wherein the first end of the third water pump is connected to the first end of the heat dissipation component via the first outlet of the second three-way valve, the first end of the third water pump is also connected to the water inlet of the cooling pipeline via the second outlet of the second three-way valve, and the second end of the third water pump is connected to the heat dissipation outlet of the battery module and the heat dissipation outlet of the energy storage converter module via the third three-way valve. ; The water outlet of the cooling pipeline is connected to the heat dissipation water inlet of the battery module; the water outlet of the cooling pipeline is also connected to the heat dissipation water inlet of the energy storage inverter module via the fifth two-way valve; the first end of the fourth water pump is connected to the first end of the heat dissipation component via the sixth two-way valve, and the second end of the fourth water pump is connected to the heat dissipation water outlet of the energy storage inverter module; the second end of the heat dissipation component is connected to the heat dissipation water inlet of the battery module via the fifth two-way valve, and the second end of the heat dissipation component is also connected to the heat dissipation water inlet of the energy storage inverter module.

[0010] Optionally, the control module is configured to: when the dual-module forced cooling circulation loop participates in thermal management, control the third water pump and the compressor refrigeration component to start, control the fourth water pump to shut down, control the fifth two-way valve to be turned on, control the sixth two-way valve to be turned off, and control the second outlet of the second three-way valve to be turned on and the first outlet to be turned off; when the dual-module natural cooling circuit participates in thermal management, control the third water pump to start, control the compressor refrigeration component and the fourth water pump to be turned off, control the fifth two-way valve to be turned on, control the sixth two-way valve to be turned off, and control the first of the second three-way valve The outlet is connected and the second outlet is closed; when the dual-mode cooling circuit participates in thermal management, the third water pump, the fourth water pump and the compressor refrigeration component are controlled to start, the fifth two-way valve is controlled to be closed, the sixth two-way valve is controlled to be connected, and the second outlet of the second three-way valve is controlled to be connected and the first outlet is closed; when the waste heat recycling circuit participates in thermal management, the third water pump is controlled to start, the fourth water pump and the compressor refrigeration component are controlled to be closed, the fifth two-way valve is controlled to be connected, the sixth two-way valve is controlled to be closed, and the second outlet of the second three-way valve is controlled to be connected and the first outlet is closed.

[0011] Optionally, the third three-way valve is a flow-adjustable three-way valve; the control module is configured to: when the dual-module forced cooling circulation circuit, the dual-module natural cooling circuit or the waste heat recycling circuit participates in thermal management, adjust the flow distribution of the third three-way valve according to the first inlet and outlet water temperature and the second inlet and outlet water temperature; and / or, when the dual-mode cooling circuit participates in thermal management, control the third three-way valve to shut off the passage to the energy storage conversion module.

[0012] Optionally, the energy storage thermal management system also includes: a detection component, which is arranged in the dual-module forced cooling circulation loop, the dual-module natural cooling circuit, the dual-mode cooling circuit and the waste heat recycling circuit, and the detection component is also connected to the control module; the detection component is used to collect water temperature and water pressure data of the dual-module forced cooling circulation loop, the dual-module natural cooling circuit, the dual-mode cooling circuit and the waste heat recycling circuit; the control module is configured to: determine the first inlet and outlet water temperature and the second inlet and outlet water temperature according to the water temperature and water pressure data provided by the detection component, and / or determine whether there is a water flow fault according to the water temperature and water pressure data.

[0013] According to another aspect of the present invention, there is provided an energy storage thermal management method, which is implemented based on the above-mentioned energy storage thermal management system and is used to perform thermal management on a battery module and an energy storage inverter module. The thermal management method comprises: acquiring ambient temperature, battery management request data, a first inlet and outlet water temperature of the battery module and a second inlet and outlet water temperature of the energy storage inverter module; and configuring a thermal management mode of the battery module and the energy storage inverter module according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperature and the second inlet and outlet water temperature.

[0014] According to another aspect of the present invention, there is provided an energy storage device, comprising: a battery module, an energy storage inverter module, and the above-mentioned energy storage thermal management system; the energy storage thermal management system is used to obtain ambient temperature, battery management request data, a first inlet and outlet water temperature of the battery module, and a second inlet and outlet water temperature of the energy storage inverter module, and configure a thermal management mode of the battery module and the energy storage inverter module according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperature, and the second inlet and outlet water temperature.

[0015] The technical solution of the embodiment of the present invention is to set a compressor refrigeration component, a heat dissipation component, a heat dissipation pipeline and a control module. The heat dissipation pipeline is provided with a two-way valve, a three-way valve and a water pump. The two-way valve, the three-way valve, the water pump, the cooling pipeline and the heat dissipation component are at least partially interconnected to form a dual-module strong cooling circulation loop, a dual-module natural cooling loop, a dual-mode cooling loop and a waste heat recycling loop that can be alternately turned on and off. The control module adjusts the two-way valve, the three-way valve, the water pump and the compressor according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperature and the second inlet and outlet water temperature. The working state of the refrigeration component of the mechanism is configured to configure the thermal management mode of the battery module and the energy storage inverter module, which solves the problems of complex piping structure, low energy utilization and high cost of the existing energy storage liquid cooling unit. The thermal management circuit control and switching between different thermal management modes are realized through two-way valves and three-way valves. The piping structure and control method are simple, the system reliability is high, and the refrigeration power consumption of the system is reduced through natural cooling. The waste heat recycling circuit can reuse the waste heat in the module to improve energy utilization. It can effectively reduce the system operating conditions under both cooling and heating conditions.

[0016] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of an energy storage thermal management system provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of the structure of an energy storage thermal management system of an alternative embodiment provided by the embodiment of the present invention;

[0020] Figure 3 A schematic structural diagram of an energy storage thermal management system according to another alternative embodiment of the present invention;

[0021] Figure 4 A flow chart of a method for thermal management of energy storage provided by an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the structure of an energy storage device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] Figure 1 This is a schematic diagram of the structure of an energy storage thermal management system provided by an embodiment of the present invention. The energy storage of this embodiment is provided with a battery module 200 and an energy storage converter module 300. The thermal management system of this embodiment is suitable for application scenarios in which thermal management of the battery module 200 and the energy storage converter module 300 is performed simultaneously. Figure 1 As shown, the thermal management system 100 of the present application includes: a compressor refrigeration component 110 , a heat dissipation component 120 , a heat dissipation pipeline 130 and a control module 140 .

[0026] The compressor refrigeration component 110 can be understood as a component that participates in refrigeration based on the low-temperature fluid provided by the compressor. Figure 2 and Figure 3 As shown, the compressor refrigeration assembly 110 is provided with a circulation pipeline 111, a cooling pipeline 112, a compressor 113, a water tank 114 and a condenser 115. Among them, the cooling pipeline 112 can be understood as a coolant circulation pipeline of the thermal management system, and the cooling pipeline 112 is connected to the heat dissipation pipeline 130; the circulation pipeline 111 can be understood as a pipeline for circulating cooling treatment of the cooling pipeline 112, and the circulation pipeline 111 is not connected to the heat dissipation pipeline 130, and only cools the heat dissipation pipeline 130. The circulation pipeline 111, the compressor 113, the water tank 114 and the condenser 115 constitute the compressor circulation cooling pipeline. When the cooling pipeline 112 participates in the refrigeration process, the compressor circulation cooling pipeline cools the fluid (for example, cooling water) flowing through the cooling pipeline 112.

[0027] The heat dissipation component 120 can be understood as a component that participates in heat dissipation based on a normal temperature fluid (such as cooling water). In this embodiment, the heat dissipation component 120 includes a heat dissipation water tank and a heat dissipation fan. The heat dissipation water tank is connected to the heat dissipation pipeline 130. At the same time, the heat dissipation fan dissipates heat from the water in the heat dissipation water tank.

[0028] The heat dissipation pipeline 130 is provided with a two-way valve, a three-way valve and a water pump. Among them, the two-way valve can be understood as a fluid control component with two interfaces (one inlet and one outlet), which can realize two-way on-off control; the three-way valve can be understood as a fluid control component with three interfaces (one inlet and two outlets or two inlets and one outlet), which can realize fluid control between three routes. In this embodiment, the three-way valve, the two-way valve, the water pump, the cooling pipeline 112 and the heat dissipation component 120 are at least partially interconnected to form a dual-module strong cooling circulation loop 101 that can be alternately turned on and off, a dual-module natural cooling loop 102, a dual-mode cooling loop 103 and a waste heat recycling loop 104. Among them, the dual-module forced cooling circulation loop 101 uses a fluid (such as cooling water) that has been cooled by the compressor refrigeration component 110 to perform forced cooling treatment on the battery module 200 and the energy storage inverter module 300; the dual-module natural cooling loop 102 uses a fluid (such as cooling water) that has been cooled by the heat dissipation component 120 to perform natural cooling treatment on the battery module 200 and the energy storage inverter module 300; the dual-mode cooling loop 103 uses a fluid (such as cooling water) that has been cooled by the heat dissipation component 120 to perform natural cooling treatment on the energy storage inverter module 300, and at the same time uses a fluid (such as cooling water) that has been cooled by the compressor refrigeration component 110 to perform forced cooling treatment on the battery module 200; the waste heat recycling loop 104 uses the waste heat generated by the energy storage inverter module 300 to heat the battery module 200. In this embodiment, the dual-module forced cooling circulation loop 101, the dual-module natural cooling loop 102, the dual-mode cooling loop 103 and the waste heat recycling loop 104 can share some pipelines, and in any thermal management mode (such as cooling or heating mode), one and only one of the dual-module forced cooling circulation loop 101, the dual-module natural cooling loop 102, the dual-mode cooling loop 103 and the waste heat recycling loop 104 is connected.

[0029] The control module 140 is used to obtain the ambient temperature, the battery management request data, the first inlet and outlet water temperature of the battery module 200 and the second inlet and outlet water temperature of the energy storage inverter module 300, and adjust the working state of the two-way valve, the three-way valve, the water pump and the compressor refrigeration assembly according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperature and the second inlet and outlet water temperature to configure the thermal management mode of the battery module 200 and the energy storage inverter module 300. In this embodiment, the ambient temperature can be understood as the temperature in the working environment of the battery module 200 and the energy storage inverter module 300. The battery management request data can be understood as data related to thermal management sent by the battery management system. Typically, the battery management request data includes but is not limited to: cooling request and heating request. The thermal management mode includes at least: dual-module simultaneous forced cooling mode, dual-module simultaneous natural cooling mode, single-module forced cooling mode, and module waste heat utilization mode.

[0030] In this embodiment, the control module 140 is used to adjust the working status of the two-way valve, three-way valve, water pump and compressor refrigeration component based on the thermal management mode, and control the on and off of the dual-module forced cooling circulation loop 101, the dual-module natural cooling loop 102, the dual-mode cooling loop 103 and the waste heat recycling loop 104.

[0031] Specifically, when the ambient temperature, battery management request data, the first inlet and outlet water temperature and the second inlet and outlet water temperature meet the conditions corresponding to the "dual-module simultaneous forced cooling mode", the dual-module forced cooling circulation loop 101 is controlled to be turned on, and the fluid (for example, cooling water) cooled by the compressor refrigeration component 110 is transmitted to the heat treatment pipelines of the battery module 200 and the energy storage inverter module 300 for forced cooling.

[0032] When the ambient temperature, battery management request data, the first inlet and outlet water temperatures and the second inlet and outlet water temperatures meet the conditions corresponding to the "dual-module simultaneous natural cooling mode", the dual-module natural cooling circuit 102 is controlled to be turned on, and the fluid (for example, cooling water) that has been heat-dissipated by the heat dissipation component 120 is transmitted to the heat treatment pipelines of the battery module 200 and the energy storage converter module 300 for natural cooling.

[0033] When the ambient temperature, battery management request data, the first inlet and outlet water temperatures and the second inlet and outlet water temperatures meet the conditions corresponding to the "single module forced cooling mode", the dual-mode cooling circuit 103 is controlled to be turned on, and the fluid (for example, cooling water) cooled by the compressor refrigeration component 110 is transmitted to the heat treatment pipeline of the battery module 200 for forced cooling. At the same time, the fluid (for example, cooling water) cooled by the heat dissipation component 120 is transmitted to the heat treatment pipeline of the energy storage inverter module 300 for natural cooling.

[0034] When the ambient temperature, battery management request data, the first inlet and outlet water temperatures and the second inlet and outlet water temperatures meet the conditions corresponding to the "module waste heat utilization mode", the waste heat recycling circuit 104 is controlled to be turned on, and the fluid (for example, cooling water) flowing through the heat treatment pipeline of the energy storage conversion module 300 is transmitted to the heat treatment pipeline of the battery module 200, and the waste heat generated by the energy storage conversion module 300 is used to heat the battery module 200.

[0035] Therefore, the technical solution of the present invention realizes the control of the thermal management circuit and the switching between different thermal management modes through a two-way valve and a three-way valve. The pipeline structure and control method are simple and the system reliability is high. It solves the problems of complex pipeline structure, low energy utilization rate and high cost of the existing energy storage liquid cooling unit. The refrigeration power consumption of the system is reduced through natural cooling. The waste heat recycling circuit can reuse the waste heat in the module to improve energy utilization rate. It can effectively reduce the system operating conditions under both cooling and heating conditions.

[0036] Figure 2 A schematic diagram of the structure of an energy storage thermal management system of an alternative embodiment provided by the present invention, in Figure 1 Based on the embodiment shown, a specific implementation of the heat dissipation pipeline 130 is provided. Figure 2 As shown, in this embodiment, the two-way valve includes a first two-way valve F21, a second two-way valve F22, a third two-way valve F23 and a fourth two-way valve F24; the three-way valve includes a first three-way valve F31; and the water pump includes a first water pump M1 and a second water pump M2.

[0037] See also Figure 2 As shown, the first end of the first water pump M1 is connected to the first end of the heat dissipation assembly 120 via the first two-way valve F21, the first end of the first water pump M1 is also connected to the water inlet of the cooling pipeline 112 via the second two-way valve F22, the second end of the first water pump M1 is connected to the heat dissipation outlet of the battery module 200 and the heat dissipation outlet of the energy storage converter module 300 via the first three-way valve F31, the water outlet of the cooling pipeline 112 is connected to the heat dissipation inlet of the battery module 200, and the cooling pipeline 112 is connected to the cooling pipeline 112. The water outlet is also connected to the heat dissipation water inlet of the energy storage converter module 300 via the third two-way valve F23; the first end of the second water pump M2 is connected to the first end of the heat dissipation component 120 via the fourth two-way valve F24, and the second end of the second water pump M2 is connected to the heat dissipation water outlet of the energy storage converter module 300; the second end of the heat dissipation component 120 is connected to the heat dissipation water inlet of the battery module 200 via the third two-way valve F23, and the second end of the heat dissipation component 120 is also connected to the heat dissipation water inlet of the energy storage converter module 300.

[0038] See also Figure 2As shown, the control module 140 of the present application is configured to: when the dual-module forced cooling circulation loop 101 participates in thermal management (i.e., the system is in the dual-module simultaneous forced cooling mode), control the first water pump M1 and the compressor refrigeration assembly 110 to start, control the second water pump M2 to close, control the first two-way valve F21 and the fourth two-way valve F24 to turn off, and control the second two-way valve F22 and the third two-way valve F23 to conduct, so that the dual-module forced cooling circulation loop 101 is conducted. Specifically, when the battery management request data is cooling request data, the control module 140 enters the thermal management mode judgment. When the ambient temperature is higher than the first preset temperature (for example, 40°C, the specific data is determined according to the actual temperature adjustment effect and specific needs), the dual-module simultaneous forced cooling mode is started. At this time, the battery module 200 and the energy storage inverter module 300 both need to use the compressor refrigeration assembly 110 to provide coolant. In this mode, the first water pump M1 and the compressor refrigeration assembly 110 are started, the dual-module forced cooling circulation loop 101 is turned on, and the fluid (for example, cooling water) cooled by the compressor refrigeration assembly 110 is transmitted to the battery module 200 via the second two-way valve F22. The fluid (for example, cooling water) cooled by the compressor refrigeration assembly 110 is transmitted to the heat treatment pipeline of the energy storage inverter module 300 via the third two-way valve F23, and the battery module 200 and the energy storage inverter module 300 are forced to cool at the same time.

[0039] See also Figure 2 As shown, when the dual-module natural cooling loop 102 participates in thermal management (i.e., the system is in the dual-module simultaneous natural cooling mode), the control module 140 controls the first water pump M1 to start, controls the compressor refrigeration component 110 and the second water pump M2 to close, controls the first two-way valve F21 and the third two-way valve F23 to be turned on, and controls the second two-way valve F22 and the fourth two-way valve F24 to be turned off, so that the dual-module natural cooling loop 102 is turned on. When the battery management request data is cooling request data, the control module 140 enters the thermal management mode judgment. When the ambient temperature is less than the second preset temperature (for example, 10°C, the specific data is determined according to the actual temperature adjustment effect and specific needs), the dual-module simultaneous natural cooling mode is started. At this time, the battery and PCS both need to use the heat dissipation component 120 to provide coolant. In this mode, the compressor refrigeration component 110 and the second water pump M2 are turned off, and only the first water pump M1 and the heat dissipation component 120 are running. The fluid treated by the heat dissipation component 120 (for example, cooling water) is transmitted to the battery module 200 via the third two-way valve F23, and is transmitted to the heat treatment pipeline of the energy storage converter module 300 via a valveless pipeline. The unit has low power consumption, for example, the power consumption is about 1kW, the cooling capacity can reach about 9kW, and the COP is close to 9.0. The system has the highest operating efficiency under this condition.

[0040] See also Figure 2As shown, when the dual-mode cooling circuit 103 participates in thermal management (i.e., the system is in the single-module forced cooling mode), the first water pump M1, the second water pump M2 and the compressor cooling assembly 110 are controlled to start, the second two-way valve F22 and the fourth two-way valve F24 are controlled to be turned on, and the first two-way valve F21 and the third two-way valve F23 are controlled to be turned off, so that the dual-mode cooling circuit 103 is turned on. When the battery management request data is cooling request data, the control module 140 enters the thermal management mode judgment. When the ambient temperature is greater than or equal to the second preset temperature (for example, 10°C, the specific data is determined according to the actual temperature adjustment effect and specific needs), and is less than or equal to the first preset temperature (for example, 40°C, the specific data is determined according to the actual temperature adjustment effect and specific needs), the single-module forced cooling mode is started. At this time, the compressor cooling assembly 110 is only responsible for providing cooling liquid to the battery module 200, and the energy storage converter module 300 uses the heat dissipation assembly 120 to provide cooling liquid. In this mode, the first water pump M1, the second water pump M2, the heat dissipation assembly 120 and the compressor refrigeration assembly 110 are all started, and the fluid (for example, cooling water) cooled by the compressor refrigeration assembly 110 is transmitted to the battery module 200 via the second two-way valve F22, and the fluid (for example, cooling water) treated by the heat dissipation assembly 120 is transmitted to the heat treatment pipeline of the energy storage inverter module 300 via a valveless pipeline. Compared with the working condition of the dual-module strong cooling mode, the output power consumption of the compressor refrigeration assembly 110 is reduced.

[0041] See also Figure 2 As shown, when the waste heat recycling loop 104 participates in thermal management (i.e., the system is in the module waste heat utilization mode), the first water pump M1 is controlled to start, the second water pump M2 and the compressor refrigeration assembly 110 are controlled to be closed, the second two-way valve F22 and the third two-way valve F23 are controlled to be turned on, and the first two-way valve F21 and the fourth two-way valve F24 are controlled to be turned off, so that the waste heat recycling loop 104 is turned on. When the ambient temperature is less than the third preset temperature (for example, 0°C, the specific data is determined according to the actual temperature adjustment effect and specific needs), or when the battery management request data is the heating request data, the module waste heat utilization mode is started, and at this time, the energy storage inverter module 300 and the heating module 500 are responsible for providing heating heat to the battery module 200. In this mode, the second water pump M2 and the compressor refrigeration assembly 110 are both turned off, and the first water pump M1 transfers the hot water provided by the heat treatment pipeline of the energy storage and conversion module 300 to the heat treatment pipeline of the battery module 200, which can reduce the power consumption of the system heating module 500 and achieve energy-saving effects.

[0042] Therefore, the technical solution of the present invention only requires simple and reliable components such as two-way valves and three-way valves to achieve cooling and heating requirements under various thermal management modes. The system makes full use of the external low-temperature environment to achieve natural cooling, greatly reducing the cooling power consumption of the unit. At the same time, the PCS waste heat can be used in the heating condition to reduce the heating power consumption of the unit. The two-way valve switching is relatively stable, the control is simple, the system configuration is simple, the stability is high, and the implementation difficulty is low.

[0043] See also Figure 2 As shown, the first three-way valve F31 is set as a flow-adjustable three-way valve. The control module 140 of the present application is configured to: when the dual-module forced cooling circulation loop 101, the dual-module natural cooling loop 102 or the waste heat recycling loop 104 participates in thermal management, adjust the flow distribution of the first three-way valve F31 according to the first inlet and outlet water temperature and the second inlet and outlet water temperature; and / or, when the dual-mode cooling loop 103 participates in thermal management, control the first three-way valve F31 to shut off the passage with the energy storage conversion module 300.

[0044] Exemplarily, when the dual-module forced cooling circulation loop 101 participates in thermal management (i.e., the system is in the dual-module simultaneous forced cooling mode), the inlet and outlet water temperatures of the thermal treatment management of the energy storage inverter module 300 are monitored in real time. If the inlet and outlet water temperature difference is too large (for example, the temperature difference exceeds 10°C, and the specific data is determined according to the actual temperature control effect and specific needs), the opening of the first three-way valve F31 is controlled to decrease (increase the flow on the side of the energy storage inverter module 300), while ensuring that the inlet and outlet water temperature difference on the battery module 200 side does not exceed 5°C (the lower limit of the three-way valve opening). If the above requirements cannot be met at the same time, the unit will determine whether there is a water flow failure based on the inlet and outlet water pressure difference, and then prompt to check whether there are abnormalities in components such as the water pump and filter.

[0045] Figure 3 A schematic diagram of the structure of an energy storage thermal management system according to another alternative embodiment of the present invention is provided. Figure 1 Based on the embodiment shown, another specific implementation of the heat dissipation pipeline 130 is provided. Figure 3 As shown, in this embodiment, the two-way valve includes a fifth two-way valve F25 and a sixth two-way valve F26; the water pump includes a third water pump M3 and a fourth water pump M4; and the three-way valve includes a second three-way valve F32 and a third three-way valve F33.

[0046] See also Figure 3As shown, the first end of the third water pump M3 is connected to the first end of the heat dissipation component 120 via the first outlet of the second three-way valve F32, the first end of the third water pump M3 is also connected to the water inlet of the cooling pipeline 112 via the second outlet of the second three-way valve F32, the second end of the third water pump M3 is respectively connected to the heat dissipation outlet of the battery module 200 and the heat dissipation outlet of the energy storage converter module 300 via the third three-way valve F33; the water outlet of the cooling pipeline 112 is connected to the heat dissipation inlet of the battery module 200; the cooling pipe The water outlet of path 112 is also connected to the heat dissipation water inlet of the energy storage converter module 300 via the fifth two-way valve F25; the first end of the fourth water pump M4 is connected to the first end of the heat dissipation component 120 via the sixth two-way valve F26, and the second end of the fourth water pump M4 is connected to the heat dissipation water outlet of the energy storage converter module 300; the second end of the heat dissipation component 120 is connected to the heat dissipation water inlet of the battery module 200 via the fifth two-way valve F25, and the second end of the heat dissipation component 120 is also connected to the heat dissipation water inlet of the energy storage converter module 300.

[0047] See also Figure 3 As shown, the control module 140 of this embodiment is configured as follows: when the dual-module forced cooling circulation loop 101 participates in thermal management, the third water pump M3 and the compressor refrigeration assembly 110 are controlled to start, the fourth water pump M4 is controlled to be closed, the fifth two-way valve F25 is controlled to be turned on, the sixth two-way valve F26 is controlled to be turned off, and the second outlet of the second three-way valve F32 is controlled to be turned on and the first outlet is controlled to be turned off. When the dual-module natural cooling loop 102 participates in thermal management, the third water pump M3 is controlled to start, the compressor refrigeration assembly 110 and the fourth water pump M4 are controlled to be turned off, the fifth two-way valve F25 is controlled to be turned on, the sixth two-way valve F26 is controlled to be turned off, and the first outlet of the second three-way valve F32 is controlled to be turned on and the second outlet is controlled to be turned off. When the dual-mode cooling circuit 103 participates in thermal management, the third water pump M3, the fourth water pump M4 and the compressor refrigeration assembly 110 are controlled to start, the fifth two-way valve F25 is controlled to be closed, the sixth two-way valve F26 is controlled to be turned on, and the second outlet of the second three-way valve F32 is controlled to be turned on and the first outlet is turned off. When the waste heat recycling circuit 104 participates in thermal management, the third water pump M3 is controlled to start, the fourth water pump M4 and the compressor refrigeration assembly 110 are controlled to be turned off, the fifth two-way valve F25 is controlled to be turned on, the sixth two-way valve F26 is controlled to be turned off, and the second outlet of the second three-way valve F32 is controlled to be turned on and the first outlet is turned off.

[0048] Specifically, in Figure 3 In the embodiment shown, a second three-way valve F32 is used to replace Figure 2 In the embodiment shown in the figure, the conduction strategy of the first two-way valve F21, the second two-way valve F22, and the second three-way valve F32 is consistent with the conduction strategy of the branch where the first two-way valve F21 and the second two-way valve F22 are located, and the conduction strategies of the other components are consistent with those of the branch where the first two-way valve F21 and the second two-way valve F22 are located. Figure 2 The embodiments shown are consistent and will not be described again here.

[0049] See also Figure 2 and Figure 3 As shown, the energy storage thermal management system of the present application also includes: a detection component, which is arranged in the dual-module forced cooling circulation loop, the dual-module natural cooling circuit, the dual-mode cooling circuit and the waste heat recycling circuit, and the detection component is also connected to the control module 140; the detection component is used to collect water temperature and water pressure data of the dual-module forced cooling circulation loop, the dual-module natural cooling circuit, the dual-mode cooling circuit and the waste heat recycling circuit. In this embodiment, the detection component includes but is not limited to: a temperature sensor T and a pressure sensor PT. The control module 140 of the present application is also configured to: determine the first inlet and outlet water temperature and the second inlet and outlet water temperature according to the water temperature and water pressure data provided by the detection component, and determine whether there is a water flow fault according to the water temperature and water pressure data, and then prompt to check whether there are abnormalities in components such as water pumps and filters, so as to improve system reliability.

[0050] Based on the above embodiments, the embodiments of the present invention further provide an energy storage thermal management method. The energy storage thermal management method of the present application is implemented based on the above energy storage thermal management system, and is used to perform thermal management on the battery module 200 and the energy storage converter module 300, and can execute the corresponding control strategies and beneficial effects of the above energy storage thermal management system.

[0051] Figure 4 Flow chart of a method for thermal management of energy storage provided by an embodiment of the present invention. Figure 4 As shown, the energy storage thermal management method of the present application includes:

[0052] S1: Acquire the ambient temperature, battery management request data, the first inlet and outlet water temperatures of the battery module 200 , and the second inlet and outlet water temperatures of the energy storage converter module 300 .

[0053] S2: configuring the thermal management mode of the battery module 200 and the energy storage converter module 300 according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperature, and the second inlet and outlet water temperature.

[0054] See also Figure 1 As shown, the thermal management system of the present application is provided with a dual-module forced cooling circulation loop 101, a dual-module natural cooling loop 102, a dual-mode cooling loop 103 and a waste heat recycling loop 104.

[0055] Optionally, the energy storage thermal management method of the present application also includes: when the dual-module forced cooling circulation loop, the dual-module natural cooling loop or the waste heat recycling loop participates in thermal management, adjusting the flow distribution of the battery module 200 and the energy storage inverter module 300 according to the first inlet and outlet water temperature and the second inlet and outlet water temperature; and / or, when the dual-mode cooling circuit participates in thermal management, controlling the forced cooling path of the energy storage inverter module 300 to be shut down.

[0056] Optionally, the energy storage thermal management method of the present application also includes: obtaining water temperature and water pressure data of the dual-module forced cooling circulation loop, the dual-module natural cooling loop, the dual-mode cooling loop and the waste heat recycling loop, and determining the first inlet and outlet water temperature and the second inlet and outlet water temperature according to the water temperature and water pressure data provided by the detection component, and / or determining whether there is a water flow fault according to the water temperature and water pressure data.

[0057] Based on the above embodiments, an embodiment of the present invention further provides an energy storage device, including the above thermal management system, and having corresponding functional modules and beneficial effects of the above thermal management system.

[0058] Figure 5 A schematic diagram of the structure of an energy storage device provided by an embodiment of the present invention. Figure 5 As shown, the energy storage device of the present application includes: a battery module 200, an energy storage inverter module 300, and the above-mentioned thermal management system 100. The thermal management system 100 is used to obtain the ambient temperature, the battery management request data, the first inlet and outlet water temperature of the battery module 200 and the second inlet and outlet water temperature of the energy storage inverter module 300, and configure the thermal management mode of the battery module 200 and the energy storage inverter module 300 according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperature and the second inlet and outlet water temperature.

[0059] In this embodiment, the energy storage equipment includes, but is not limited to: an energy storage power station or a mobile energy storage device.

[0060] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0061] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy storage thermal management system, characterized in that: Used to perform thermal management on battery modules and energy storage converter modules, the thermal management system includes: A compressor refrigeration assembly is provided with a circulation pipeline and a cooling pipeline; Heat dissipation components; The heat dissipation pipeline is provided with a two-way valve, a three-way valve and a water pump. The three-way valve, the two-way valve, the water pump, the cooling pipeline and the heat dissipation component constitute a dual-module strong cooling circulation loop, a dual-module natural cooling loop, a dual-mode cooling loop and a waste heat recycling loop that can be switched on and off alternately; A control module is used to obtain the ambient temperature, battery management request data, the first inlet and outlet water temperatures of the battery module and the second inlet and outlet water temperatures of the energy storage inverter module, and adjust the working states of the two-way valve, the three-way valve, the water pump and the compressor refrigeration assembly according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperatures and the second inlet and outlet water temperatures to configure the thermal management mode of the battery module and the energy storage inverter module.

2. The energy storage thermal management system according to claim 1, characterized in that: The two-way valve comprises a first two-way valve, a second two-way valve, a third two-way valve and a fourth two-way valve; The three-way valve comprises a first three-way valve; The water pump comprises a first water pump and a second water pump; Wherein, the first end of the first water pump is connected to the first end of the heat dissipation assembly via the first two-way valve, the first end of the first water pump is also connected to the water inlet of the cooling pipeline via the second two-way valve, the second end of the first water pump is respectively connected to the heat dissipation outlet of the battery module and the heat dissipation outlet of the energy storage converter module via the first three-way valve, the water outlet of the cooling pipeline is connected to the heat dissipation inlet of the battery module, and the water outlet of the cooling pipeline is also connected to the heat dissipation inlet of the energy storage converter module via the third two-way valve; The first end of the second water pump is connected to the first end of the heat dissipation component via the fourth two-way valve, and the second end of the second water pump is connected to the heat dissipation outlet of the energy storage converter module; The second end of the heat dissipation component is connected to the heat dissipation water inlet of the battery module via the third two-way valve, and the second end of the heat dissipation component is also connected to the heat dissipation water inlet of the energy storage converter module.

3. The energy storage thermal management system according to claim 2, characterized in that: The control module is configured to: when the dual-module strong cooling circulation loop participates in thermal management, control the first water pump and the compressor refrigeration component to start, control the second water pump to shut down, control the first two-way valve and the fourth two-way valve to close, and control the second two-way valve and the third two-way valve to conduct; When the dual-module natural cooling circuit participates in thermal management, the first water pump is controlled to start, the compressor refrigeration assembly and the second water pump are controlled to shut down, the first two-way valve and the third two-way valve are controlled to conduct, and the second two-way valve and the fourth two-way valve are controlled to shut down; When the dual-mode cooling circuit participates in thermal management, the first water pump, the second water pump and the compressor refrigeration assembly are controlled to start, the second two-way valve and the fourth two-way valve are controlled to be turned on, and the first two-way valve and the third two-way valve are controlled to be turned off; When the waste heat recycling circuit participates in thermal management, the first water pump is controlled to start, the second water pump and the compressor refrigeration component are controlled to shut down, the second two-way valve and the third two-way valve are controlled to be connected, and the first two-way valve and the fourth two-way valve are controlled to be closed.

4. The energy storage thermal management system according to claim 2, characterized in that: The first three-way valve is a flow-adjustable three-way valve; The control module is configured to: adjust the flow distribution of the first three-way valve according to the first inlet and outlet water temperature and the second inlet and outlet water temperature when the dual-module forced cooling circulation circuit, the dual-module natural cooling circuit or the waste heat recycling circuit participates in thermal management; and / or, when the dual-mode cooling circuit participates in thermal management, control the first three-way valve to shut off the passage to the energy storage conversion module.

5. The energy storage thermal management system according to claim 1, characterized in that: The two-way valve comprises a fifth two-way valve and a sixth two-way valve; The water pump comprises a third water pump and a fourth water pump; The three-way valve comprises a second three-way valve and a third three-way valve; Wherein, the first end of the third water pump is connected to the first end of the heat dissipation component via the first outlet of the second three-way valve, the first end of the third water pump is also connected to the water inlet of the cooling pipeline via the second outlet of the second three-way valve, the second end of the third water pump is respectively connected to the heat dissipation outlet of the battery module and the heat dissipation outlet of the energy storage converter module via the third three-way valve; the water outlet of the cooling pipeline is connected to the heat dissipation inlet of the battery module; the water outlet of the cooling pipeline is also connected to the heat dissipation inlet of the energy storage converter module via the fifth two-way valve; The first end of the fourth water pump is connected to the first end of the heat dissipation component via the sixth two-way valve, and the second end of the fourth water pump is connected to the heat dissipation outlet of the energy storage converter module; The second end of the heat dissipation component is connected to the heat dissipation water inlet of the battery module via the fifth two-way valve, and the second end of the heat dissipation component is also connected to the heat dissipation water inlet of the energy storage converter module.

6. The energy storage thermal management system according to claim 5, characterized in that: The control module is configured to: when the dual-module strong cooling circulation loop participates in thermal management, control the third water pump and the compressor refrigeration component to start, control the fourth water pump to shut down, control the fifth two-way valve to be turned on, control the sixth two-way valve to be turned off, and control the second outlet of the second three-way valve to be turned on and the first outlet to be turned off; When the dual-module natural cooling circuit participates in thermal management, the third water pump is controlled to start, the compressor refrigeration assembly and the fourth water pump are controlled to be turned off, the fifth two-way valve is controlled to be turned on, the sixth two-way valve is controlled to be turned off, and the first outlet of the second three-way valve is controlled to be turned on and the second outlet is controlled to be turned off; When the dual-mode cooling circuit participates in thermal management, the third water pump, the fourth water pump and the compressor refrigeration assembly are controlled to start, the fifth two-way valve is controlled to be closed, the sixth two-way valve is controlled to be turned on, and the second outlet of the second three-way valve is controlled to be turned on and the first outlet is controlled to be turned off; When the waste heat recycling circuit participates in thermal management, the third water pump is controlled to start, the fourth water pump and the compressor refrigeration component are controlled to shut down, the fifth two-way valve is controlled to be turned on, the sixth two-way valve is controlled to be turned off, and the second outlet of the second three-way valve is controlled to be turned on and the first outlet is turned off.

7. The energy storage thermal management system according to claim 5, characterized in that: The third three-way valve is a flow-adjustable three-way valve; The control module is configured to: adjust the flow distribution of the third three-way valve according to the first inlet and outlet water temperature and the second inlet and outlet water temperature when the dual-module forced cooling circulation circuit, the dual-module natural cooling circuit or the waste heat recycling circuit participates in thermal management; and / or, when the dual-mode cooling circuit participates in thermal management, control the third three-way valve to shut off the passage to the energy storage conversion module.

8. The energy storage thermal management system according to any one of claims 1 to 7, characterized in that: Also includes: A detection component is arranged in the dual-module forced cooling circulation loop, the dual-module natural cooling loop, the dual-mode cooling loop and the waste heat recycling loop, and the detection component is also connected to the control module; The detection component is used to collect water temperature and water pressure data of the dual-module forced cooling circulation loop, the dual-module natural cooling loop, the dual-mode cooling loop and the waste heat recycling loop; The control module is configured to: determine the first inlet and outlet water temperature and the second inlet and outlet water temperature according to the water temperature and water pressure data provided by the detection component, and / or determine whether there is a water flow fault according to the water temperature and water pressure data.

9. A method for thermal management of energy storage, characterized in that: The energy storage thermal management system according to any one of claims 1 to 8 is used to perform thermal management on a battery module and an energy storage converter module, and the thermal management method includes: Acquire the ambient temperature, battery management request data, the first inlet and outlet water temperature of the battery module, and the second inlet and outlet water temperature of the energy storage converter module; The thermal management mode of the battery module and the energy storage converter module is configured according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperatures, and the second inlet and outlet water temperatures.

10. An energy storage device, characterized in that: include: A battery module, an energy storage converter module, and an energy storage thermal management system as claimed in any one of claims 1 to 8; The energy storage thermal management system is used to obtain the ambient temperature, battery management request data, the first inlet and outlet water temperatures of the battery module and the second inlet and outlet water temperatures of the energy storage inverter module, and configure the thermal management mode of the battery module and the energy storage inverter module according to at least one of the ambient temperature, the battery management request data, the first inlet and outlet water temperatures and the second inlet and outlet water temperatures.

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