Novel constant-temperature unit system for energy storage and control method thereof

Abstract

On one hand, two battery compartment medium paths and two inverter medium paths are provided to solve the problems that an existing constant-temperature unit system cannot work normally at low temperature and a PCS cannot be cooled when liquid cooling is conducted under the high-temperature or low-temperature condition; on the other hand, a control method for the novel constant-temperature unit system for energy storage is designed, the inverter target water temperature and the battery cabin target water temperature are obtained, and corresponding regulation and control are conducted by combining the comparison relation between the inverter target water temperature and the radiator outlet water temperature, the comparison relation between the battery cabin target water temperature and the inverter outlet water temperature and the comparison relation between the battery cabin target water temperature and the battery outlet water temperature; the problem that the overall energy consumption of the system is high can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of constant temperature units, and particularly relates to a new type of constant temperature unit system for energy storage and its control method. Background Art

[0002] During the energy transportation and storage processes of energy storage devices, heat is either generated or absorbed. When the operating temperature of the devices is too high or too low, it may lead to out-of-control situations of the devices, resulting in immeasurable losses. Therefore, it is necessary to control the temperature of the devices separately, and the temperature control devices are crucial.

[0003] The current temperature control devices mainly have the following deficiencies.

[0004] 1. The constant temperature control device must first perform compression refrigeration and then convert through an intermediate medium.

[0005] 2. The existing devices have relatively high energy consumption and cannot operate normally in a relatively low-temperature environment, which may lead to the following situations.

[0006] They cannot work at relatively low temperatures and are prone to damaging related components.

[0007] They cannot provide refrigeration for the liquid-cooled PCS alone, and cannot ensure the normal operation of the liquid-cooled PCS in high-temperature or relatively low-temperature situations.

[0008] Serious energy waste occurs. In any case of refrigeration, the compressor needs to be started, resulting in an additional need to provide a separate energy input for the compressor, causing waste. Summary of the Invention

[0009] To solve at least one of the defects existing in the prior art, the purpose of the present invention is to provide a new type of constant temperature unit system for energy storage.

[0010] The technical solution adopted by the present invention to solve its problems is: a new type of constant temperature unit system for energy storage, including:

[0011] Two battery cabin medium paths and two inverter medium paths. Among them,

[0012] The first battery cabin medium path includes, connected in sequence, a battery cabin water pump, a battery three-way ball valve, a plate heat exchanger, a plate heat exchanger battery outlet temperature sensor, a heater, a battery inlet temperature sensor, a battery inlet temperature and pressure sensor, an energy storage battery pack, a battery outlet pressure sensor, a battery outlet temperature sensor, a filter, a makeup water tank, and a battery cabin water pump.

[0013] The second battery compartment medium path includes, connected in sequence, a battery compartment water pump, a battery three-way ball valve, a radiator, a radiator outlet temperature sensor, a heater, a battery inlet temperature sensor, a battery inlet pressure sensor, an energy storage battery pack, a battery outlet pressure sensor, a battery outlet temperature sensor, a filter, a make-up water tank, and a battery compartment water pump;

[0014] The first inverter medium path includes, connected in sequence, an inverter water pump, an inverter three-way ball valve, a plate heat exchanger, an inverter outlet temperature sensor, an inverter inlet temperature sensor, an inverter inlet pressure sensor, an energy storage inverter, an inverter outlet pressure sensor, the inverter outlet, a filter screen, a make-up water tank, and an inverter water pump;

[0015] The second inverter medium path includes, connected in sequence, an inverter water pump, an inverter three-way ball valve, a radiator, a radiator outlet temperature sensor, an inverter inlet temperature sensor, an inverter inlet pressure sensor, an energy storage inverter, an inverter outlet pressure sensor, the inverter outlet, a filter screen, a make-up water tank, and an inverter water pump.

[0016] Among them, the battery outlet pressure sensor is used to detect the outlet pressure of the battery-side system to avoid leakage of the battery-side system caused by excessive pressure; the battery outlet temperature sensor is used to obtain the battery outlet temperature; the battery liquid level sensor is used to detect the liquid level of the battery-side system, and when the liquid level reaches a certain level, it reminds the user to add coolant; the radiator outlet temperature sensor is used to obtain the outlet temperature of the radiator; the plate heat exchanger battery outlet temperature sensor is used to obtain the outlet temperature of the battery side plate heat exchanger; the battery inlet temperature sensor is used by the user to obtain the battery side inlet temperature; the battery inlet pressure sensor is used to detect the system inlet pressure to avoid damage to system components caused by water shortage in the battery-side system; the inverter outlet pressure sensor is used to detect the outlet pressure of the inverter-side system to avoid leakage of the inverter-side system caused by excessive pressure, the inverter outlet temperature sensor is used by the user to obtain the inverter outlet temperature, the inverter liquid level sensor is used to detect the liquid level of the inverter-side system, and when the liquid level reaches a certain level, it reminds the user to add coolant, the plate heat exchanger inverter outlet temperature sensor is used to obtain the outlet temperature of the plate heat exchanger inverter side, and the inverter inlet temperature sensor obtains the inverter side inlet temperature; the inverter inlet pressure sensor is used to detect the system inlet pressure to avoid damage to system components caused by water shortage in the inverter-side system.

[0017] Furthermore, the system further includes a condenser device,

[0018] The condenser device includes, connected in sequence, a condenser, a liquid receiver, a pressure switch, an electronic expansion valve, a plate heat exchanger, a compressor-side pressure sensor, a suction temperature sensor, a gas-liquid separator, an electric compressor, and a condenser;

[0019] The condenser device is used to provide a condensing function.

[0020] Furthermore, the system further includes a cooling fan for cooling the system.

[0021] The present invention also provides a control method for a new type of constant temperature unit system for energy storage, which is applied to the new type of constant temperature unit system for energy storage and includes:

[0022] Each time the system is started, all ball valves are opened to the middle state, and there is medium flow in the first battery compartment medium path, the second battery compartment medium path, the first inverter medium path, and the second inverter medium path; the cooling fan is turned on, and after waiting for a preset duration, the following judgments are made:

[0023] Obtain the target water temperature of the inverter and the target water temperature of the battery compartment;

[0024] Judge the opening conditions of the battery compartment water pump and the inverter water pump, and adjust the switching quantity of the battery three-way ball valve based on the opening conditions of the battery compartment water pump and the inverter water pump;

[0025] After that, if heating is required, further determine the heating requirements of the inverter and the battery, and adjust the switching quantity of the three-way ball valve through the PID algorithm according to the heating requirements of the inverter and the battery.

[0026] Furthermore, specifically, judging the opening conditions of the battery compartment water pump and the inverter water pump, and adjusting the switching quantity of the battery three-way ball valve based on the opening conditions of the battery compartment water pump and the inverter water pump, includes:

[0027] When only the battery compartment water pump or only the energy storage inverter water pump is turned on,

[0028] When the target water temperature of the inverter ≤ the outlet water temperature of the radiator, the outlet water temperature of the radiator ≥ the outlet water temperature of the inverter, or the target water temperature of the battery compartment ≤ the outlet water temperature of the radiator, the outlet water temperature of the radiator ≥ the outlet water temperature of the battery, all of the three-way ball valve leading to the radiator side are closed;

[0029] When the target water temperature of the inverter ≥ the outlet water temperature of the radiator or the target water temperature of the battery compartment ≥ the outlet water temperature of the radiator, all of the three-way ball valve leading to the plate heat exchanger side are closed

[0030] When the target water temperature of the inverter ≤ the outlet water temperature of the radiator, the outlet water temperature of the radiator < the outlet water temperature of the inverter, or the target water temperature of the battery compartment ≤ the outlet water temperature of the radiator, the outlet water temperature of the radiator < the outlet water temperature of the battery, the three-way ball valve adjusts the switching quantity of the three-way ball valve through the PID algorithm according to the target water temperature of the inverter or the target water temperature of the battery compartment;

[0031] When both the battery compartment water pump and the energy storage inverter water pump are turned on

[0032] When the target water temperature of the inverter ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator ≥ the outlet water temperature of the inverter, the three-way ball valve of the inverter closes the waterway leading to the radiator; when the target water temperature of the battery compartment ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator ≥ the outlet water temperature of the battery, the three-way ball valve of the battery compartment closes the waterway leading to the radiator.

[0033] When the target water temperature of the inverter ≥ the outlet water temperature of the radiator, the three-way ball valve of the inverter closes the waterway leading to the plate heat exchanger; when the target water temperature of the battery compartment ≥ the outlet water temperature of the radiator, the three-way ball valve of the battery compartment closes the waterway leading to the plate heat exchanger.

[0034] When the target water temperature of the inverter ≥ the outlet water temperature of the radiator, the three-way ball valve of the inverter closes the waterway leading to the plate heat exchanger; when the target water temperature of the battery compartment ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the battery, the three-way ball valve of the battery compartment adjusts the opening / closing amount of the three-way ball valve according to the target water temperature of the battery compartment through the PID algorithm.

[0035] When the target water temperature of the inverter ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator ≥ the outlet water temperature of the inverter, the three-way ball valve of the inverter closes the waterway leading to the radiator; when the target water temperature of the battery compartment ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the battery, the three-way ball valve of the battery compartment adjusts the opening / closing amount of the three-way ball valve according to the target water temperature of the battery compartment through the PID algorithm.

[0036] When the target water temperature of the battery compartment ≥ the outlet water temperature of the radiator, the three-way ball valve of the battery compartment closes the waterway leading to the plate heat exchanger; when the target water temperature of the inverter ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the inverter, the three-way ball valve of the inverter adjusts the opening / closing amount of the three-way ball valve according to the target water temperature of the inverter through the PID algorithm.

[0037] When the target water temperature of the battery compartment ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator ≥ the outlet water temperature of the battery, all the waterways leading to the radiator side of the three-way ball valve are closed; when the target water temperature of the inverter ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the inverter, the three-way ball valve of the inverter adjusts the opening / closing amount of the three-way ball valve according to the target water temperature of the inverter through the PID algorithm.

[0038] When the target water temperature of the battery compartment ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the battery, the three-way ball valve of the battery compartment adjusts the opening / closing amount of the three-way ball valve according to the target water temperature of the battery compartment through the PID algorithm; when the target water temperature of the inverter ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the inverter, the three-way ball valve of the inverter adjusts the opening / closing amount of the three-way ball valve according to the target water temperature of the inverter through the PID algorithm.

[0039] Furthermore, specifically, adjusting the opening / closing amount of the three-way ball valve through the PID algorithm according to the heating requirements of the inverter and the battery includes,

[0040] When both the inverter and the battery need to be heated, the three-way ball valve of the inverter and the ball valve of the battery compartment are both opened to the radiator side, and the heater is turned on for heating.

[0041] When the inverter needs to be heated and the battery needs to be cooled, the three-way ball valve of the inverter is opened to the radiator side, and the three-way ball valve of the battery compartment adjusts the opening degree of the three-way ball valve through the PID algorithm according to the target water temperature of the battery compartment.

[0042] When the battery compartment needs to be heated and the inverter needs to be cooled, the three-way ball valve of the battery compartment adjusts the opening degree of the three-way ball valve through the PID algorithm according to the target water temperature of the battery compartment.

[0043] The beneficial effects of the present invention: Provide a new type of constant temperature unit system for energy storage. On the one hand, two medium paths for the battery compartment and two medium paths for the inverter are proposed to solve the problems that the existing constant temperature unit system cannot work properly at low temperatures and the PCS cannot be cooled in high or low temperature conditions for liquid cooling; on the other hand, a control method for a new type of constant temperature unit system for energy storage is designed. By obtaining the target water temperature of the inverter and the target water temperature of the battery compartment, and combining the comparison relationships between the target water temperature of the inverter, the target water temperature of the battery compartment and the outlet water temperature of the radiator, the outlet water temperature of the inverter, and the outlet water temperature of the battery, corresponding regulation can be carried out, which can solve the problem of high overall energy consumption of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly describe the drawings required for the description of the embodiments. Obviously, the described drawings are only a part of the embodiments of the present invention, rather than all embodiments. Those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative efforts.

[0045] Figure 1 It is the structural schematic diagram of a new type of constant temperature unit system for energy storage of the present invention;

[0046] Figure 2 It is the central controller control relationship diagram of a new type of constant temperature unit system for energy storage of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in conjunction with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present invention. In addition, all the connection relationships mentioned in the text do not simply refer to the direct connection of components, but refer to the more optimal circuit structure that can be formed by adding or reducing connection components according to the specific implementation situation. The various technical features in the present invention can be combined interactively without conflicting with each other.

[0048] Referring to Figure 1 and Figure 2 , Embodiment 1, a new type of constant temperature unit system for energy storage, comprising:

[0049] Two battery compartment medium paths and two inverter medium paths, wherein,

[0050] The first battery compartment medium path includes, connected in sequence, a battery compartment water pump, a battery three-way ball valve, a plate heat exchanger, a plate heat exchanger battery outlet temperature sensor, a heater, a battery inlet temperature sensor, a battery inlet temperature and pressure sensor, an energy storage battery pack, a battery outlet pressure sensor, a battery outlet temperature sensor, a filter, a make-up water tank, and a battery compartment water pump;

[0051] The second battery compartment medium path includes, connected in sequence, a battery compartment water pump, a battery three-way ball valve, a radiator, a radiator outlet temperature sensor, a heater, a battery inlet temperature sensor, a battery inlet pressure sensor, an energy storage battery pack, a battery outlet pressure sensor, a battery outlet temperature sensor, a filter, a make-up water tank, and a battery compartment water pump;

[0052] The first inverter medium path includes, connected in sequence, an inverter water pump, an inverter three-way ball valve, a plate heat exchanger, an inverter outlet temperature sensor, an inverter inlet temperature sensor, an inverter inlet pressure sensor, an energy storage inverter, an inverter outlet pressure sensor, an inverter outlet, a filter screen, a make-up water tank, and an inverter water pump;

[0053] The second inverter medium path includes, connected in sequence, an inverter water pump, an inverter three-way ball valve, a radiator, a radiator outlet temperature sensor, an inverter inlet temperature sensor, an inverter inlet pressure sensor, an energy storage inverter, an inverter outlet pressure sensor, an inverter outlet, a filter screen, a make-up water tank, and an inverter water pump.

[0054] Among them, the battery outlet water pressure sensor is used to detect the water outlet pressure of the battery-side system to prevent leakage of the battery-side system due to excessive pressure; the battery outlet water temperature sensor is used to obtain the battery outlet water temperature; the battery liquid level sensor is used to detect the liquid level of the battery-side system, and when the liquid level reaches a certain level, it reminds the user to add coolant; the radiator outlet water temperature sensor is used to obtain the outlet water temperature of the radiator; the plate heat exchanger battery outlet water temperature sensor is used to obtain the outlet water temperature of the plate heat exchanger on the battery side; the battery inlet water temperature sensor is used to obtain the battery-side inlet water temperature; the battery inlet water pressure sensor is used to detect the system inlet water pressure to prevent damage to system components due to water shortage in the battery-side system; the inverter outlet water pressure sensor is used to detect the water outlet pressure of the inverter-side system to prevent leakage of the inverter-side system due to excessive pressure, the inverter outlet water temperature sensor is used to obtain the inverter outlet water temperature, the inverter liquid level sensor is used to detect the liquid level of the inverter-side system, and when the liquid level reaches a certain level, it reminds the user to add coolant, the plate heat exchanger inverter outlet water temperature sensor is used to obtain the outlet water temperature of the plate heat exchanger on the inverter side, and the inverter inlet water temperature sensor obtains the inverter-side inlet water temperature; the inverter inlet water pressure sensor is used to detect the system inlet water pressure to prevent damage to system components due to water shortage in the inverter-side system.

[0055] In Embodiment 1, on the one hand, two battery compartment medium paths and two inverter medium paths are proposed to solve the problems that the existing constant temperature unit system cannot work properly at low temperatures and the PCS cannot be cooled in high or low temperature situations for liquid cooling; on the other hand, a control method for a new type of constant temperature unit system for energy storage is designed. By obtaining the target water temperature of the inverter and the target water temperature of the battery compartment, and combining the comparison relationships between the target water temperature of the inverter, the target water temperature of the battery compartment and the radiator outlet water temperature, the inverter outlet water temperature, and the battery outlet water temperature for corresponding regulation, the problem of high overall system energy consumption can be solved.

[0056] There are two ways for the battery compartment medium to flow

[0057] Battery-side path 1: Battery compartment water pump → Battery three-way ball valve → Plate heat exchanger → Plate heat exchanger battery outlet water temperature sensor → Heater → Battery inlet water temperature sensor → Battery inlet water temperature and pressure sensor → Energy storage battery pack → Battery outlet water pressure sensor → Battery outlet water temperature sensor → Filter → Make-up water tank → Battery compartment water pump

[0058] Battery-side path 2: Battery compartment water pump → Battery three-way ball valve → Radiator → Radiator outlet water temperature sensor → Heater → Battery inlet water temperature sensor → Battery inlet water pressure sensor → Energy storage battery pack → Battery outlet water pressure sensor → Battery outlet water temperature sensor → Filter → Make-up water tank → Battery compartment water pump

[0059] There are two ways for the energy storage inverter medium to flow

[0060] Energy storage inverter side path three: Inverter pure compressor refrigeration mode: Inverter water pump → Inverter three-way ball valve → Plate heat exchanger → Plate heat exchanger inverter outlet temperature sensor → Inverter inlet temperature sensor → Inverter inlet pressure sensor → Energy storage inverter → Inverter outlet pressure sensor → Inverter outlet → Filter → Make-up water tank → Inverter water pump

[0061] Energy storage inverter side path four: Inverter water pump → Inverter three-way ball valve → Radiator → Radiator outlet temperature sensor → Inverter inlet temperature sensor → Inverter inlet pressure sensor → Energy storage inverter → Inverter outlet pressure sensor → Inverter outlet → Filter → Make-up water tank → Inverter water pump.

[0062] As a preferred embodiment of the present invention, the system further includes a condenser device,

[0063] The condenser device includes a condenser, a liquid receiver, a pressure switch, an electronic expansion valve, a plate heat exchanger, a compressor side pressure sensor, a suction temperature sensor, a gas-liquid separator, an electric compressor, and a condenser connected in sequence;

[0064] The condenser device is used to provide a condensing function.

[0065] As a preferred embodiment of the present invention, the system further includes a cooling fan, and the cooling fan is used to cool the system.

[0066] The present invention also proposes a control method for a new type of constant temperature unit system for energy storage, which is applied to the new type of constant temperature unit system for energy storage, and includes,

[0067] Each time the system is started, all ball valves are opened to the middle state, and there is medium flow in the first battery compartment medium path, the second battery compartment medium path, the first inverter medium path, and the second inverter medium path; the cooling fan is turned on, and after waiting for a preset duration, the following judgments are made,

[0068] Obtain the target water temperature of the inverter and the target water temperature of the battery compartment;

[0069] Judge the opening conditions of the battery compartment water pump and the inverter water pump, and adjust the switch quantity of the battery three-way ball valve based on the opening conditions of the battery compartment water pump and the inverter water pump;

[0070] After that, if heating is required, further determine the heating requirements of the inverter and the battery, and adjust the switch quantity of the three-way ball valve through the PID algorithm according to the heating requirements of the inverter and the battery.

[0071] As a preferred embodiment of the present invention, specifically, judging the opening conditions of the battery compartment water pump and the inverter water pump, and adjusting the switch quantity of the battery three-way ball valve based on the opening conditions of the battery compartment water pump and the inverter water pump, includes,

[0072] When only the battery compartment water pump or only the energy storage inverter water pump is turned on,

[0073] When the inverter target water temperature ≤ the radiator outlet water temperature, the radiator outlet water temperature ≥ the inverter outlet water temperature, or the battery compartment target water temperature ≤ the radiator outlet water temperature, the radiator outlet water temperature ≥ the battery outlet water temperature, all of the three-way ball valves leading to the radiator side are closed;

[0074] When the inverter target water temperature ≥ the radiator outlet water temperature or the battery compartment target water temperature ≥ the radiator outlet water temperature, all of the three-way ball valves leading to the plate heat exchanger side are closed;

[0075] When the inverter target water temperature ≤ the radiator outlet water temperature, the radiator outlet water temperature < the inverter outlet water temperature, or the battery compartment target water temperature ≤ the radiator outlet water temperature, the radiator outlet water temperature < the battery outlet water temperature, the three-way ball valve adjusts the opening / closing amount of the three-way ball valve according to the inverter target water temperature or the battery compartment target water temperature through the PID algorithm;

[0076] When both the battery compartment water pump and the energy storage inverter water pump are turned on,

[0077] When the inverter target water temperature ≤ the radiator outlet water temperature, the radiator outlet water temperature ≥ the inverter outlet water temperature, the inverter three-way ball valve closes the waterway leading to the radiator; when the battery compartment target water temperature ≤ the radiator outlet water temperature, the radiator outlet water temperature ≥ the battery outlet water temperature, the battery compartment three-way ball valve closes the waterway leading to the radiator;

[0078] When the inverter target water temperature ≥ the radiator outlet water temperature, the inverter three-way ball valve closes the waterway leading to the plate heat exchanger; when the battery compartment target water temperature ≥ the radiator outlet water temperature, the battery compartment three-way ball valve closes the waterway leading to the plate heat exchanger;

[0079] When the inverter target water temperature ≥ the radiator outlet water temperature, the inverter three-way ball valve closes the waterway leading to the plate heat exchanger; when the battery compartment target water temperature ≤ the radiator outlet water temperature, the radiator outlet water temperature < the battery outlet water temperature, the battery compartment three-way ball valve adjusts the opening / closing amount of the three-way ball valve according to the battery compartment target water temperature through the PID algorithm;

[0080] When the inverter target water temperature ≤ the radiator outlet water temperature, the radiator outlet water temperature ≥ the inverter outlet water temperature, the inverter three-way ball valve closes the waterway leading to the radiator; when the battery compartment target water temperature ≤ the radiator outlet water temperature, the radiator outlet water temperature < the battery outlet water temperature, the battery compartment three-way ball valve adjusts the opening / closing amount of the three-way ball valve according to the battery compartment target water temperature through the PID algorithm;

[0081] When the target water temperature in the battery compartment ≥ the outlet water temperature of the radiator, the three-way ball valve in the battery compartment closes the waterway leading to the plate heat exchanger; when the target water temperature of the inverter ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the inverter, the three-way ball valve of the inverter adjusts the opening degree of the three-way ball valve according to the target water temperature of the inverter through the PID algorithm.

[0082] When the target water temperature in the battery compartment ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator ≥ the outlet water temperature of the battery, all the three-way ball valves leading to the radiator side are closed; when the target water temperature of the inverter ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the inverter, the three-way ball valve of the inverter adjusts the opening degree of the three-way ball valve according to the target water temperature of the inverter through the PID algorithm.

[0083] When the target water temperature in the battery compartment ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the battery, the three-way ball valve in the battery compartment adjusts the opening degree of the three-way ball valve according to the target water temperature in the battery compartment through the PID algorithm; when the target water temperature of the inverter ≤ the outlet water temperature of the radiator and the outlet water temperature of the radiator < the outlet water temperature of the inverter, the three-way ball valve of the inverter adjusts the opening degree of the three-way ball valve according to the target water temperature of the inverter through the PID algorithm.

[0084] As a preferred embodiment of the present invention, specifically, the opening degree of the three-way ball valve is adjusted through the PID algorithm according to the heating requirements of the inverter and the battery, including,

[0085] When both the inverter and the battery need heating, the three-way ball valve of the inverter and the ball valve in the battery compartment are both opened to the radiator side, and the heater is turned on for heating.

[0086] When the inverter needs heating and the battery needs cooling, the three-way ball valve of the inverter is opened to the radiator side, and the three-way ball valve in the battery compartment adjusts the opening degree of the three-way ball valve according to the target water temperature in the battery compartment through the PID algorithm;

[0087] When the battery compartment needs heating and the inverter needs cooling, the three-way ball valve in the battery compartment adjusts the opening degree of the three-way ball valve according to the target water temperature in the battery compartment through the PID algorithm.

[0088] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A new type of constant temperature unit system for energy storage, characterized in that: include: Two battery compartment media paths and two inverter media paths, where: The first battery compartment medium path includes, connected in sequence, a battery compartment water pump, a battery three-way ball valve, a plate heat exchanger, a plate heat exchanger battery outlet water temperature sensor, a heater, a battery inlet water temperature sensor, a battery inlet water temperature pressure sensor, an energy storage battery pack, a battery outlet water pressure sensor, a battery outlet water temperature sensor, a filter, a water supply tank, and a battery compartment water pump; The second battery compartment medium path includes, connected in sequence, a battery compartment water pump, a battery three-way ball valve, a radiator, a radiator water outlet temperature sensor, a heater, a battery water inlet temperature sensor, a battery water inlet pressure sensor, an energy storage battery pack, a battery water outlet pressure sensor, a battery water outlet temperature sensor, a filter, a water supply tank, and a battery compartment water pump; The first inverter medium path includes, connected in sequence, an inverter water pump, an inverter three-way ball valve, a plate heat exchanger, an inverter water outlet temperature sensor, an inverter water inlet temperature sensor, an inverter water inlet pressure sensor, an energy storage inverter, an inverter water outlet pressure sensor, an inverter water outlet, a filter, a water supply tank, and an inverter water pump; The second inverter medium path includes, connected in sequence, an inverter water pump, an inverter three-way ball valve, a radiator, a radiator water outlet temperature sensor, an inverter water inlet temperature sensor, an inverter water inlet pressure sensor, an energy storage inverter, an inverter water outlet pressure sensor, inverter water outlet, a filter, a water supply tank, and an inverter water pump; The radiator water outlet temperature sensor is used to obtain the radiator water outlet temperature, the inverter water outlet temperature sensor is used to obtain the inverter water outlet temperature, and the battery water outlet temperature sensor is used to obtain the battery water outlet temperature. The battery water outlet pressure sensor is used to detect the water outlet pressure of the battery side system to avoid leakage of the battery side system caused by excessive pressure; the battery water outlet temperature sensor is used to obtain the battery water outlet temperature; the battery liquid level sensor is used to detect the liquid level of the battery side system. When the liquid level reaches a certain level, the user is reminded to add coolant; the radiator water outlet temperature sensor is used to obtain the radiator water outlet temperature; the plate replacement battery water outlet temperature sensor is used to obtain the battery side plate replacement water outlet temperature; the battery inlet temperature sensor is used to obtain the battery side water inlet temperature; the battery inlet pressure sensor is used to detect the system water inlet pressure to avoid water shortage on the battery side system. Causing damage to system components; the inverter water outlet pressure sensor is used to detect the system water outlet pressure on the inverter side to avoid leakage of the inverter side system due to excessive pressure; the inverter water outlet temperature sensor allows users to obtain the inverter water outlet temperature; the inverter liquid level sensor is used to detect the system liquid level on the inverter side. When the liquid level reaches a certain level, the user is reminded to add coolant; the panel-swapping inverter water outlet temperature sensor is used to obtain the panel-swapping inverter side water outlet temperature; the inverter water inlet temperature sensor obtains the inverter side water inlet temperature; the inverter water inlet pressure sensor is used to detect the system water inlet pressure to avoid damage to system components due to water shortage on the inverter side.

2. A novel constant temperature unit system for energy storage according to claim 1, characterized in that: The system further comprises a condenser device, The condenser device comprises a condenser, a liquid reservoir, a pressure switch, an electronic expansion valve, a plate heat exchanger, a compressor side pressure sensor, an intake air temperature sensor, a gas-liquid separator, an electric compressor, and a condenser which are connected in sequence; The condenser device is used to provide a condensation function.

3. A novel constant temperature unit system for energy storage according to claim 1, characterized in that: The system further comprises a cooling fan, and the cooling fan is used for cooling the system.

4. A control method for a novel constant temperature unit system for energy storage, characterized in that: A novel constant temperature unit system for energy storage as described in any one of claims 1 to 3, comprising: Each time the system is turned on, all ball valves are opened to the middle state, and medium flows through the first battery compartment medium path, the second battery compartment medium path, the first inverter medium path, and the second inverter medium path; the cooling fan is turned on, and the following judgment is made after waiting for a preset time: Obtain the target water temperature of the inverter and the target water temperature of the battery compartment; Determine the opening status of the battery compartment water pump and the inverter water pump, and adjust the switch amount of the battery three-way ball valve based on the opening status of the battery compartment water pump and the inverter water pump; Afterwards, if heating is required, the heating requirements of the inverter and the battery are further determined, and the switching amount of the three-way ball valve is adjusted through the PID algorithm according to the heating requirements of the inverter and the battery.

5. A control method for a novel constant temperature unit system for energy storage according to claim 4, characterized in that: Specifically, judging the opening status of the battery compartment water pump and the inverter water pump, and adjusting the switch quantity of the battery three-way ball valve based on the opening status of the battery compartment water pump and the inverter water pump, including: When only the battery compartment water pump or the energy storage inverter water pump is turned on, When the inverter target water temperature is ≤ the radiator outlet water temperature, the radiator outlet water temperature is ≥ the inverter outlet water temperature or the battery compartment target water temperature is ≤ the radiator outlet water temperature, the radiator outlet water temperature is ≥ the battery outlet water temperature, the three-way ball valve leading to the radiator side is completely closed; When the inverter target water temperature ≥ radiator outlet water temperature or the battery compartment target water temperature ≥ radiator outlet water temperature, all three-way ball valves leading to the plate heat exchanger side are closed; When the inverter target water temperature is ≤ the radiator outlet water temperature, the radiator outlet water temperature is < the inverter outlet water temperature, or the battery compartment target water temperature is ≤ the radiator outlet water temperature, the radiator outlet water temperature is < the battery outlet water temperature, the three-way ball valve adjusts the switch amount of the three-way ball valve according to the inverter target water temperature or the battery compartment target water temperature through the PID algorithm; When both the battery compartment water pump and the energy storage inverter water pump are turned on, When the inverter target water temperature is ≤ the radiator outlet water temperature and the radiator outlet water temperature is ≥ the inverter outlet water temperature, the inverter three-way ball valve closes the water path to the radiator; when the battery compartment target water temperature is ≤ the radiator outlet water temperature and the radiator outlet water temperature is ≥ the battery outlet water temperature, the battery compartment three-way ball valve closes the water path to the radiator; When the inverter target water temperature is ≥ the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery compartment target water temperature is ≥ the radiator outlet water temperature, the battery compartment three-way ball valve closes the water path to the plate heat exchanger; When the inverter target water temperature is ≥ the radiator outlet water temperature, the inverter three-way ball valve closes the water path to the plate heat exchanger; when the battery compartment target water temperature is ≤ the radiator outlet water temperature and the radiator outlet water temperature is < the battery outlet water temperature, the battery compartment three-way ball valve adjusts the switch amount of the three-way ball valve according to the battery compartment target water temperature through the PID algorithm; When the inverter target water temperature is ≤ the radiator outlet water temperature and the radiator outlet water temperature is ≥ the inverter outlet water temperature, the inverter three-way ball valve closes the water path to the radiator; when the battery compartment target water temperature is ≤ the radiator outlet water temperature and the radiator outlet water temperature is < the battery outlet water temperature, the battery compartment three-way ball valve adjusts the switch value of the three-way ball valve according to the battery compartment target water temperature through the PID algorithm; When the battery compartment target water temperature is ≥ the radiator outlet water temperature, the battery compartment three-way ball valve closes the water path to the plate heat exchanger; when the inverter target water temperature is ≤ the radiator outlet water temperature and the radiator outlet water temperature is < the inverter outlet water temperature, the inverter three-way ball valve adjusts the switch value of the three-way ball valve according to the inverter target water temperature through the PID algorithm; When the battery compartment target water temperature is ≤ the radiator outlet water temperature and the radiator outlet water temperature is ≥ the battery outlet water temperature, the three-way ball valve leading to the radiator side is completely closed; when the inverter target water temperature is ≤ the radiator outlet water temperature and the radiator outlet water temperature is < the inverter outlet water temperature, the inverter three-way ball valve adjusts the switching amount of the three-way ball valve according to the inverter target water temperature through the PID algorithm; When the battery compartment target water temperature is ≤ the radiator outlet water temperature or the radiator outlet water temperature is < the battery outlet water temperature, the battery compartment three-way ball valve adjusts the switching amount of the three-way ball valve through the PID algorithm according to the battery compartment target water temperature; when the inverter target water temperature is ≤ the radiator outlet water temperature or the radiator outlet water temperature is < the inverter outlet water temperature, the inverter three-way ball valve adjusts the switching amount of the three-way ball valve through the PID algorithm according to the inverter target water temperature.

6. A control method for a novel constant temperature unit system for energy storage according to claim 4, characterized in that: Specifically, the switching amount of the three-way ball valve is adjusted through the PID algorithm according to the heating requirements of the inverter and the battery, including: When both the inverter and the battery need to be heated, the inverter three-way ball valve and the battery compartment ball valve are opened to the radiator side, and the heater is turned on for heating. When the inverter needs to be heated and the battery needs to be cooled, the inverter three-way ball valve opens to the radiator side, and the battery compartment three-way ball valve adjusts the switch amount of the three-way ball valve through the PID algorithm according to the target water temperature of the battery compartment; When the battery compartment needs to be heated and the inverter needs to be cooled, the battery compartment three-way ball valve adjusts the switching amount of the three-way ball valve through the PID algorithm according to the target water temperature of the battery compartment.

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