Graphite electric energy storage system for heating system and intelligent heating method

Abstract

The application discloses a graphite electric energy storage system for a heating system and an intelligent heating method, the graphite electric energy storage system comprises a heat storage side and a heating side, the heat storage side and the heating side are connected through a plate heat exchanger, the heat storage side comprises at least one graphite electric energy storage device and a heat exchange pipe, the graphite electric energy storage device comprises a plurality of layers of graphite electric energy storage modules, each graphite electric energy storage module comprises a plurality of graphite units, a heating rod is arranged in each graphite unit, and the intelligent heating method comprises the following steps: the graphite electric energy storage device heats the heat exchange pipe; the first temperature and the second temperature are detected; and the electromagnetic valve of a waterway and the switch of the heating rod are controlled according to the first temperature, the second temperature, the electric energy use state of the heating rod and a preset control strategy. The application can make the operation of the heating system more stable and safe, the equipment operation more reliable, the heat efficiency higher, the heating temperature change fluctuation smaller, the user experience more comfortable, the automatic operation save the labor cost and improve the work efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to a graphite electric energy storage system for a heating system and an intelligent heating method. BACKGROUND

[0002] The heating system refers to a general term of a boiler room boiler, heat exchange unit, outdoor heating pipe network and radiator.

[0003] The boiler is a kind of energy conversion equipment, which inputs chemical energy and electric energy into the boiler, and outputs steam, high-temperature water or organic heat carrier with heat energy after the combustion conversion of the boiler.

[0004] The boiler includes a pot and a furnace, the pot refers to a container, and the furnace refers to a place for burning fuel. The steam or hot water produced by the operation of the boiler can directly provide the required heat energy for industrial production and people's life.

[0005] The heating system outputs a lot of energy, and the heat in the energy can ensure the heating and life of residents and users. In addition to the utilized heat, a part of the energy is wasted.

[0006] The heating system is changing to intelligent and low-carbon, and graphite is often used for electric energy storage in this process. The existing graphite electric energy storage device has the defects of low intelligent degree, large temperature fluctuation during heating, low thermal efficiency and low working efficiency. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the defects of low intelligent degree, large temperature fluctuation during heating, low thermal efficiency and low working efficiency of the existing graphite electric energy storage device, and to provide a graphite electric energy storage system for a heating system and an intelligent heating method, which makes the operation of the heating system more stable and safe, the equipment operation more reliable, the thermal efficiency higher, the heating temperature change smaller, the user experience more comfortable, the automatic operation saves labor cost and improves working efficiency.

[0008] The present application solves the above technical problems by the following technical scheme:

[0009] An intelligent heating method for a heating system is used for a graphite electric energy storage system, the graphite electric energy storage system includes a heat storage side and a heating side, the heat storage side and the heating side are connected through a plate heat exchanger, the heat storage side includes at least one graphite electric energy storage device and a heat exchange pipe, the graphite electric energy storage device includes a plurality of layers of graphite electric energy storage modules, the heat exchange pipe includes a plurality of water paths, the pipeline of each water path is arranged between adjacent graphite electric energy storage modules, each graphite electric energy storage module includes a plurality of graphite units, and a heating rod is arranged in each graphite unit. The intelligent heating method comprises the following steps:

[0010] The graphite electric energy storage device heats the heat exchange pipe;

[0011] detecting a first temperature of each graphite electric energy storage module, and detecting a second temperature of a water outlet of a heat supply side of the plate heat exchanger;

[0012] controlling the electromagnetic valves of the water paths and the switches of the heating rods according to the first temperature, the second temperature, a use state of electric energy of the heating rods, and a preset control strategy.

[0013] Preferably, the preset control strategy comprises:

[0014] determining whether a maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, closing the electromagnetic valves of the water paths heated by the graphite electric energy storage module with the lowest temperature; and / or,

[0015] for a graphite electric energy storage module, stopping heating of all the heating rods in the graphite electric energy storage module when the first temperature of the graphite electric energy storage module is greater than an upper limit temperature, and starting heating of all the heating rods in the graphite electric energy storage module when the first temperature of the graphite electric energy storage module is less than a lower limit temperature.

[0016] Preferably, the water paths of the heat exchange pipes are divided into a plurality of water path groups, and the preset control strategy comprises:

[0017] determining whether a maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, closing the electromagnetic valves of all the water paths in a target water path group, the target water path group being a water path group in which the water paths heated by the graphite electric energy storage module with the lowest temperature are located.

[0018] Preferably, the preset control strategy comprises:

[0019] determining whether a maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, closing the electromagnetic valves of all the water paths in a target water path group, the graphite electric energy storage module with the lowest temperature being located in the target water path group and the number of the graphite electric energy storage modules being an odd number greater than or equal to 3.

[0020] starting heating of all the heating rods in the graphite electric energy storage modules located in the target water path group;

[0021] The intelligent heat supply method comprises:

[0022] recording information of the graphite electric energy storage modules located in the target water path group.

[0023] Preferably, the heat supply side comprises a thermometer and a buffer tank, the thermometer is arranged between the water outlet of the heat supply side of the plate heat exchanger and the buffer tank and is used to obtain the second temperature, the water temperature of the buffer tank is a third temperature, and the preset control strategy comprises:

[0024] determining whether the third temperature belongs to a preset interval, and if not, increasing or decreasing the number of the opened water paths;

[0025] After increasing or decreasing the number of open water paths, the second temperature is detected and the number of open or closed water paths is adjusted according to the second temperature.

[0026] Preferably, the preset control strategy comprises:

[0027] If the third temperature is less than a preset temperature value, one of the water paths is opened.

[0028] After opening one of the water paths, the second temperature is detected at a preset time interval,

[0029] When the second temperature is greater than the third temperature, the current number of water paths is maintained.

[0030] When the second temperature is less than or equal to the third temperature, one of the water paths is opened again.

[0031] And / or,

[0032] The preset control strategy comprises:

[0033] If the third temperature is greater than a preset temperature value, one of the water paths is closed.

[0034] After closing one of the water paths, the second temperature is detected at a preset time interval,

[0035] When the second temperature is less than the third temperature, the current number of water paths is maintained.

[0036] When the second temperature is greater than or equal to the third temperature, one of the water paths is closed again.

[0037] Preferably, the preset control strategy comprises:

[0038] If the third temperature is greater than the maximum value of a preset interval, one of the water paths is closed.

[0039] After closing one of the water paths, the second temperature is detected at a preset time interval,

[0040] When the second temperature is greater than the maximum value of the preset interval, one of the water paths is closed again.

[0041] When the second temperature is less than the middle value of the preset interval, one of the water paths is opened.

[0042] When the second temperature is less than the maximum value of the preset interval and greater than the middle value, the current number of water paths is maintained.

[0043] And / or,

[0044] The preset control strategy comprises:

[0045] determining whether the third temperature is less than the minimum value of the preset interval, and if so, opening one of the water paths;

[0046] after opening one of the water paths, detecting the second temperature at a preset time interval,

[0047] when the second temperature is less than the minimum value of the preset interval, opening one of the water paths again,

[0048] when the second temperature is greater than the median value of the preset interval, closing one of the water paths,

[0049] when the second temperature is greater than the minimum value of the preset interval and less than the median value, maintaining the current number of open water paths.

[0050] Preferably, the preset control strategy comprises:

[0051] determining whether the third temperature belongs to the preset interval, and if not, increasing or decreasing the number of open water paths;

[0052] after increasing or decreasing the number of open water paths, detecting the second temperature at a preset time interval;

[0053] obtaining the rate of change of the second temperature according to the length of the preset time interval;

[0054] adjusting the number of open or closed water paths according to the rate of change.

[0055] Preferably, the preset control strategy comprises:

[0056] when increasing the number of open water paths, opening the water paths in the order of decreasing temperature of the graphite electric energy storage module;

[0057] when decreasing the number of open water paths, closing the water paths in the order of increasing temperature of the graphite electric energy storage module.

[0058] Preferably, the intelligent heating method comprises:

[0059] recording the number of times of closing the water paths;

[0060] limiting the flow of the water path with the maximum number of times of closing in a unit time;

[0061] and / or,

[0062] respectively recording the number of times of opening and closing the water paths;

[0063] the heat exchange pipe comprises a mixing pipe, and the water paths with the maximum number of times of opening and closing mix in the mixing pipe before being discharged.

[0064] The present application also provides a graphite electric energy storage system for a heating system, which is used in the intelligent function method as described above.

[0065] According to the common knowledge in the art, the above-mentioned preferred conditions can be combined arbitrarily to obtain preferred examples of the present application.

[0066] The positive progress effect of the present application is that:

[0067] The present application can make the operation of the heating system more stable and safe, the equipment operation more reliable, the thermal efficiency higher, the heating temperature change smaller, and the user experience more comfortable, thereby saving labor cost and improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0068] Figure 1 FIG. 1 is a structural schematic diagram of a graphite electric energy storage system according to an embodiment of the present application.

[0069] Figure 2 FIG. 2 is a structural schematic diagram of a graphite electric energy storage device according to an embodiment of the present application.

[0070] Figure 3 FIG. 3 is a flowchart of an intelligent heating method according to an embodiment of the present application. DETAILED DESCRIPTION

[0071] The present application will be further described below by way of examples, but the present application is not limited in the scope of the examples.

[0072] Example 1

[0073] Reference Figure 1 , Figure 2 The present embodiment provides a graphite electric energy storage system for a heating system. The graphite electric energy storage system comprises a heat storage side 11 and a heat supply side 21.

[0074] The heat storage side and the heat supply side are connected through a plate heat exchanger 31. The heat storage side comprises at least one graphite electric energy storage device 111 and a heat exchange pipe. The graphite electric energy storage device comprises a plurality of layers of graphite electric energy storage modules. The heat exchange pipe comprises a plurality of water paths. The pipeline of each water path is arranged between adjacent graphite electric energy storage modules. Each graphite electric energy storage module comprises a plurality of graphite units. Each graphite unit is provided with a heating rod.

[0075] The graphite electric energy storage system comprises a processing module. The sensor signals collected by the heat storage side and the heat supply side are transmitted to the processing module. The processing module can be composed of a plurality of processing units. The plurality of processing units are distributed on various processing nodes.

[0076] The graphite electric energy storage device is used for heating the heat exchange pipe.

[0077] The temperature sensor in the graphite unit is used to detect the first temperature of each layer of the graphite electric energy storage module. In this embodiment, each graphite unit includes a temperature sensor, and the temperature of a layer of the graphite electric energy storage module is the average value of all the graphite units under the layer.

[0078] The temperature sensor of the heat supply side outlet of the plate heat exchanger is used to obtain the second temperature, and the first temperature is the average temperature of the graphite units in the graphite electric energy storage module.

[0079] The processing module is used to control the electromagnetic valve of the waterway and the switch of the heating rod according to the first temperature, the second temperature, the heating rod electric energy use state and a preset control strategy.

[0080] In the specific implementation,

[0081] The analog input signal includes:

[0082] The graphite temperature adopts a K-type thermocouple, and a K-type thermocouple acquisition module is used. The graphite inlet temperature, the plate heat storage side inlet temperature, the plate heat storage side outlet temperature, the plate heat storage side inlet pressure, the graphite inlet pressure, the outdoor temperature, the heat storage side circulating frequency converter feedback, the electric regulating valve feedback, the heat supply side supply temperature, the heat supply side return temperature, the buffer tank temperature, the heat supply side supply pressure, the heat supply side return pressure, the heat supply side circulating frequency converter feedback and the heat supply side water supply frequency converter feedback are collected.

[0083] The analog output signal includes:

[0084] The heat storage side circulating frequency converter given value, the electric regulating valve given value, the heat supply side circulating frequency converter given value and the heat supply side water supply frequency converter given value are collected.

[0085] The digital input signal includes:

[0086] The energy storage device start / stop, the heating rod start / stop, the heating rod running state, the heat storage side circulating pump fault, the heat storage side circulating pump running state, the heat storage side circulating pump start / stop, the heat supply side circulating pump fault, the heat supply side circulating pump running state, the heat supply side circulating pump manual automatic selection, the heat supply side water supply pump fault, the heat supply side water supply pump running state, the heat supply side water supply pump manual automatic selection, the heat supply side circulating pump start / stop and the heat supply side water supply pump start / stop are collected.

[0087] The digital output signal includes:

[0088] The heating rod start, the heat storage side circulating pump running, the heat supply side circulating pump running, the heat supply side water supply pump running and the electromagnetic valve are collected.

[0089] The processing module can also be a cloud server. The cloud server detects signals uploaded by the graphite electric energy storage system, and issues instructions to the graphite electric energy storage system execution device after operation. The processing module can also prestore a preset control strategy. The preset control strategy includes:

[0090] determining whether the maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, closing the electromagnetic valve of the water path heated by the graphite electric energy storage module with the lowest temperature;

[0091] For a graphite electric energy storage module, when the first temperature of the graphite electric energy storage module is greater than the upper limit temperature, the heating of all heating rods in the graphite electric energy storage module is stopped, and when the first temperature of the graphite electric energy storage module is less than the lower limit temperature, the heating of all heating rods in the graphite electric energy storage module is started.

[0092] In this embodiment, the heat storage device has N layers, each layer has M K-type thermocouples, and there are several heating rods. The temperature measured by each thermocouple is displayed on the HMI, and the average temperature of each layer is calculated. If the average value is lower than 300°C (set in this embodiment), the heating rods in this layer are started.

[0093] When a certain thermocouple has a measurement problem, the average temperature should exclude the value of the problem thermocouple.

[0094] Each group of heating rods can be independently started manually, and the heating rods are invalid when started manually in the automatic mode of the heat storage device.

[0095] Referring to Figure 2 In this embodiment, there are 15 layers of graphite electric energy storage modules 41, each layer of graphite electric energy storage module includes two to three graphite units 42, and there are 8 water paths 43 in this embodiment, which are controlled by 8 electromagnetic valves. Each graphite unit includes 3 heating rods 44.

[0096] In this embodiment, the 8 water paths are divided into 2 groups.

[0097] Preferably, the water paths of the heat exchange pipes are divided into several water path groups, and the preset control strategy includes:

[0098] determining whether the maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, closing the electromagnetic valve of all water paths in the target water path group, the target water path group being the water path group in which the water path heated by the graphite electric energy storage module with the lowest temperature is located.

[0099] Further, the preset control strategy includes:

[0100] determining whether the maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, closing the electromagnetic valve of all water paths in the target water path group, the target water path group being the water path group in which the graphite electric energy storage module with the lowest temperature and the number of graphite electric energy storage modules being an odd number greater than 3 is located.

[0101] starting the heating of all heating rods in the graphite electric energy storage modules in the middle of the target water path group;

[0102] The intelligent heating method includes:

[0103] record information of the graphite electric energy storage module in the middle of the target waterway group.

[0104] The above control strategy is used to adjust the temperature balance among all graphite electric energy storage modules.

[0105] Further, the heat supply side comprises a thermometer 211 and a buffer tank 212, the thermometer is arranged between the heat supply side outlet of the plate heat exchanger and the buffer tank and is used to obtain the second temperature, the water temperature of the buffer tank is a third temperature, and the preset control strategy comprises:

[0106] determining whether the third temperature belongs to a preset interval, and if not, increasing or decreasing the number of opened waterways;

[0107] After increasing or decreasing the number of opened waterways, the value of the second temperature is detected, and the number of opened or closed waterways is adjusted according to the second temperature.

[0108] Preferably, the preset control strategy comprises:

[0109] determining whether the third temperature is less than a preset temperature value, and if so, opening one of the waterways;

[0110] After opening one of the waterways, the second temperature is detected at a preset time interval,

[0111] maintaining the current number of waterways when the second temperature is greater than the third temperature,

[0112] opening one of the waterways again when the second temperature is less than or equal to the third temperature;

[0113] The preset control strategy comprises:

[0114] determining whether the third temperature is greater than a preset temperature value, and if so, closing one of the waterways;

[0115] After closing one of the waterways, the second temperature is detected at a preset time interval,

[0116] maintaining the current number of waterways when the second temperature is less than the third temperature,

[0117] closing one of the waterways again when the second temperature is greater than or equal to the third temperature.

[0118] Further, the preset control strategy comprises:

[0119] when increasing the number of opened waterways, opening the waterways in the order of the temperature of the graphite electric energy storage module from high to low;

[0120] when decreasing the number of opened waterways, closing the waterways in the order of the temperature of the graphite electric energy storage module from low to high.

[0121] The intelligent heating method comprises:

[0122] record the number of times of closing the water path;

[0123] limit the flow of the water path with the maximum number of times of closing in a unit time;

[0124] Further,

[0125] record the number of times of opening and closing the water path respectively;

[0126] The heat exchange pipe comprises a mixing pipe, and the water from the water paths with the maximum number of times of opening and closing is mixed in the mixing pipe.

[0127] In the embodiment, the water path comprises a front electromagnetic valve and a rear electromagnetic valve, as shown in Figure 2 In the first mode of the embodiment, the heat exchange liquid in the water path enters the graphite electric energy storage module after passing through the front electromagnetic valve, is heated, and then returns from another graphite electric energy storage module through the loop. In another mode, a mixing pipe is provided, the heat exchange liquid in the water path enters the graphite electric energy storage module after passing through the front electromagnetic valve, is heated, and then enters the mixing pipe. An electromagnetic valve is also provided on the mixing pipe. The mixing pipe is controlled by the electromagnetic valve to mix the water from different water paths and then pass through the other graphite electric energy storage module.

[0128] Further balance the temperature between the graphite electric energy storage modules of each layer.

[0129] Referring to Figure 3 , the graphite electric energy storage system, the embodiment further provides an intelligent heating method, comprising:

[0130] The graphite electric energy storage device heats the heat exchange pipe;

[0131] detect the first temperature of each layer of the graphite electric energy storage module, and detect the second temperature of the water outlet of the heating side of the plate heat exchanger;

[0132] According to the first temperature, the second temperature, the heating rod electric energy use state, and the preset control strategy, control the electromagnetic valve of the water path and the switch of the heating rod.

[0133] The preset control strategy comprises:

[0134] determine whether the maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, close the electromagnetic valve of the water path heated by the graphite electric energy storage module with the lowest temperature; and / or,

[0135] For a graphite electric energy storage module, when the first temperature of the graphite electric energy storage module is greater than the upper limit temperature, stop heating all the heating rods in the graphite electric energy storage module, and when the first temperature of the graphite electric energy storage module is less than the lower limit temperature, open the heating of all the heating rods in the graphite electric energy storage module.

[0136] Specifically, the water path of the heat exchange pipe is divided into several water path groups, and the preset control strategy includes:

[0137] determining whether the maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, closing the electromagnetic valves of all water paths in a target water path group, the target water path group being a water path group in which the graphite electric energy storage module with the lowest temperature is heated.

[0138] Preferably, the preset control strategy includes:

[0139] determining whether the maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, closing the electromagnetic valves of all water paths in a target water path group, the target water path group being a water path group in which the graphite electric energy storage module with the lowest temperature is heated.

[0140] turning on all heating rods in the graphite electric energy storage modules in the target water path group to heat;

[0141] The intelligent heating method includes:

[0142] recording information of the graphite electric energy storage modules in the target water path group.

[0143] Further, the heating side includes a thermometer and a buffer tank, the thermometer is arranged between the heating side outlet of the plate heat exchanger and the buffer tank and is used to obtain the second temperature, the water temperature of the buffer tank is a third temperature, and the preset control strategy includes:

[0144] determining whether the third temperature belongs to a preset interval, and if not, increasing or decreasing the number of opened water paths;

[0145] After increasing or decreasing the number of opened water paths, detecting the value of the second temperature and adjusting the number of opened or closed water paths according to the second temperature.

[0146] Further, the preset control strategy includes:

[0147] determining whether the third temperature is less than a preset temperature value, and if so, opening one of the water paths;

[0148] after opening one of the water paths, detecting the second temperature at a preset time interval,

[0149] maintaining the current number of water paths when the second temperature is greater than the third temperature,

[0150] opening another water path when the second temperature is less than or equal to the third temperature;

[0151] The preset control strategy includes:

[0152] determining whether the third temperature is greater than a preset temperature value, and if yes, closing one of the water paths;

[0153] after closing one of the water paths, detecting the second temperature at a preset time interval,

[0154] when the second temperature is less than the third temperature, maintaining the current number of water paths,

[0155] when the second temperature is greater than or equal to the third temperature, closing one of the water paths again.

[0156] The embodiment can make the operation of the heating system more stable and safe, make the equipment operation more reliable, make the heating efficiency higher, make the heating temperature change less fluctuant, make the user experience more comfortable, save the labor cost in the automatic operation, and improve the work efficiency.

[0157] Embodiment 2

[0158] The embodiment is basically the same as Embodiment 1, and the difference is only that:

[0159] the preset control strategy comprises:

[0160] determining whether the third temperature is greater than a maximum value of a preset interval, and if yes, closing one of the water paths;

[0161] after closing one of the water paths, detecting the second temperature at a preset time interval,

[0162] when the second temperature is greater than the maximum value of the preset interval, closing one of the water paths again,

[0163] when the second temperature is less than a middle number of the preset interval, opening one of the water paths,

[0164] when the second temperature is less than the maximum value of the preset interval and greater than the middle number, maintaining the current number of water paths;

[0165] the preset control strategy further comprises:

[0166] determining whether the third temperature is less than a minimum value of a preset interval, and if yes, opening one of the water paths;

[0167] after opening one of the water paths, detecting the second temperature at a preset time interval,

[0168] when the second temperature is less than the minimum value of the preset interval, opening one of the water paths again,

[0169] when the second temperature is greater than a middle number of the preset interval, closing one of the water paths,

[0170] when the second temperature is greater than the minimum value of the preset interval and less than the middle number, maintaining the current number of water paths.

[0171] Embodiment 3

[0172] This embodiment is basically the same as Embodiment 1, except that:

[0173] The preset control strategy comprises:

[0174] determining whether the third temperature belongs to a preset interval, and if not, increasing or decreasing the number of open waterways;

[0175] After increasing or decreasing the number of open waterways, the second temperature is detected at a preset time interval;

[0176] According to the length of the preset time interval, the change rate of the second temperature is obtained;

[0177] According to the change rate, the number of open or closed waterways is adjusted.

[0178] Although the specific embodiments of the present application are described above, those skilled in the art should understand that these are only illustrative, the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and such changes and modifications all fall within the protection scope of the present application.

Claims

1. An intelligent heating method for a heating system, characterized by, The application relates to an intelligent heating method for a graphite electric energy storage system, the graphite electric energy storage system comprising a heat storage side and a heat supply side, the heat storage side and the heat supply side being connected through a plate heat exchanger, the heat storage side comprising at least one graphite electric energy storage device and a heat exchange pipe, the graphite electric energy storage device comprising a plurality of layers of graphite electric energy storage modules, the heat exchange pipe comprising a plurality of water paths, the pipeline of each water path being arranged between adjacent graphite electric energy storage modules, each graphite electric energy storage module comprising a plurality of graphite units, and a heating rod being arranged in each graphite unit. The graphite electric energy storage device heats the heat exchange pipe. A first temperature of each layer of graphite electric energy storage modules is detected, and a second temperature of a water outlet on the heat supply side of the plate heat exchanger is detected. The opening and closing of the water paths and the opening and closing of the heating rods are controlled according to the first temperature, the second temperature, the electric energy use state of the heating rods and a preset control strategy. The heat supply side comprises a thermometer and a buffer tank, the thermometer is arranged between the water outlet on the heat supply side of the plate heat exchanger and the buffer tank and is used for obtaining the second temperature, the water temperature of the buffer tank is a third temperature, and the preset control strategy comprises the following steps. It is judged whether the third temperature belongs to a preset interval, and if not, the number of opened water paths is increased or decreased. After the number of opened water paths is increased or decreased, the value of the second temperature is detected, and the number of opened or closed water paths is adjusted according to the second temperature. The preset control strategy further comprises the following steps. It is judged whether the third temperature belongs to a preset interval, and if not, the number of opened water paths is increased or decreased. After the number of opened water paths is increased or decreased, the second temperature is detected at a preset time interval. The change rate of the second temperature is obtained according to the length of the preset time interval. The number of opened or closed water paths is adjusted according to the change rate. The intelligent heating method further comprises the following steps. The number of closed water paths is recorded. The flow of the water path with the maximum number of closed times in a unit time is limited.

2. The intelligent heating method of claim 1, wherein, The preset control strategy comprises the following steps. It is judged whether the maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, the electromagnetic valve of the water path heated by the graphite electric energy storage module with the lowest temperature is closed; and / or For a graphite electric energy storage module, when the first temperature of the graphite electric energy storage module is greater than an upper limit temperature, the heating of all the heating rods in the graphite electric energy storage module is stopped, and when the first temperature of the graphite electric energy storage module is less than a lower limit temperature, the heating of all the heating rods in the graphite electric energy storage module is started.

3. The intelligent heating method of claim 2, wherein, The water paths of the heat exchange pipe are divided into a plurality of water path groups, and the preset control strategy comprises the following steps. It is judged whether the maximum temperature difference between the graphite electric energy storage modules exceeds a preset temperature, and if so, the electromagnetic valves of all the water paths in a target water path group are closed, the target water path group being the water path group in which the water path heated by the graphite electric energy storage module with the lowest temperature is located.

4. The intelligent heating method of claim 1, wherein, The preset control strategy comprises the following steps. It is judged whether the third temperature is less than a preset temperature value, and if so, one water path is opened. After one water path is opened, the second temperature is detected at a preset time interval. When the second temperature is greater than the third temperature, the current number of water paths is maintained. When the second temperature is less than or equal to the third temperature, one water path is opened again. And / or The preset control strategy comprises the following steps. determining whether the third temperature is greater than a preset temperature value, and if so, closing one of the water paths; after closing one of the water paths, detecting the second temperature at a preset time interval, maintaining the current number of open water paths when the second temperature is less than the third temperature, closing one of the water paths again when the second temperature is greater than or equal to the third temperature.

5. The intelligent heating method of claim 1, wherein, the preset control strategy comprises: determining whether the third temperature is greater than a maximum value of a preset interval, and if so, closing one of the water paths; after closing one of the water paths, detecting the second temperature at a preset time interval, closing one of the water paths again when the second temperature is greater than the maximum value of the preset interval, opening one of the water paths when the second temperature is less than a middle value of the preset interval, maintaining the current number of open water paths when the second temperature is less than the maximum value of the preset interval and greater than the middle value; and / or, the preset control strategy comprises: determining whether the third temperature is less than a minimum value of a preset interval, and if so, opening one of the water paths; after opening one of the water paths, detecting the second temperature at a preset time interval, opening one of the water paths again when the second temperature is less than the minimum value of the preset interval, closing one of the water paths when the second temperature is greater than a middle value of the preset interval, maintaining the current number of open water paths when the second temperature is greater than the minimum value of the preset interval and less than the middle value.

6. The intelligent heating method according to claim 4 or 5, characterized in that, the preset control strategy comprises: when increasing the number of open water paths, opening the water paths in the order of decreasing temperature of the graphite electric energy storage modules; when decreasing the number of open water paths, closing the water paths in the order of increasing temperature of the graphite electric energy storage modules.

7. A graphite electrical energy storage system for a heating system, characterized by the graphite electric energy storage system is used in the intelligent heating method as in any one of 1 to 6.

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