Electrolyte temperature control method, device and equipment of hydrogen production system

Abstract

The invention relates to an electrolyte temperature control method, device and equipment of a hydrogen production system. The hydrogen production system comprises a photovoltaic unit, an energy storage unit, an electrolytic cell unit, an electrolyte circulation loop connected with the electrolytic cell unit and a target DC-DC converter, the distance between the target DC-DC converter and the electrolyte circulation loop is smaller than a preset distance, and the target DC-DC converter comprises a DC-DC converter connected between the photovoltaic unit and the energy storage unit and / or a DC-DC converter connected between the photovoltaic unit and the energy storage unit. The DC-DC converter is connected between the energy storage unit and the electrolytic bath unit. The method comprises the following steps: acquiring the real-time temperature of an electrolyte in the electrolytic bath unit; determining a target working mode corresponding to a target temperature range according to the target temperature range of the real-time temperature of the electrolyte; and controlling the target DC-DC converter to work based on the target working mode. By adopting the method, the energy utilization efficiency can be optimized.

Description

Technical Field

[0001] This application relates to the field of new energy hydrogen production technology, and in particular to a method, apparatus and equipment for controlling the electrolyte temperature of a hydrogen production system. Background Technology

[0002] Hydrogen production systems are one of the key pathways to achieving green hydrogen production. Among them, the electrolyzer, as the core component of hydrogen production, needs to operate under suitable temperature conditions to ensure hydrogen production efficiency and equipment safety.

[0003] However, current hydrogen production systems have significant technical shortcomings in low-temperature environments. Electrolyzers face difficulties in cold start-up, and the associated preheating solutions have numerous deficiencies. On one hand, in low-temperature environments, the electrolyte viscosity increases significantly, and the ion migration rate decreases drastically. Direct start-up not only leads to low hydrogen production efficiency but may also cause irreversible damage to the internal structure of the electrolyzer. Therefore, the electrolyte typically needs to be preheated to 60-80°C before it can enter normal operating conditions. On the other hand, existing technologies generally use independent electric heaters to preheat the electrolyte. This method requires additional heating elements, control circuits, and safety protection modules, increasing system complexity and hardware costs, occupying significant installation space, and hindering modular and integrated system layout. Consequently, the overall utilization rate of independent heater equipment is low, reducing the overall energy efficiency of the system. Summary of the Invention

[0004] Therefore, it is necessary to provide a question-and-answer method, apparatus, and device for hardware design specifications that can optimize energy utilization to address the aforementioned technical problems.

[0005] In a first aspect, this application provides a method for controlling the electrolyte temperature in a hydrogen production system. The hydrogen production system includes: a photovoltaic unit, an energy storage unit, an electrolyzer unit, an electrolyte circulation loop connected to the electrolyzer unit, and a target DC-DC converter. The distance between the target DC-DC converter and the electrolyte circulation loop is less than a preset distance. The target DC-DC converter includes: a DC-DC converter connected between the photovoltaic unit and the energy storage unit, and / or a DC-DC converter connected between the energy storage unit and the electrolyzer unit. The method includes:

[0006] Obtain the real-time temperature of the electrolyte in the electrolytic cell unit;

[0007] Based on the target temperature range in which the real-time temperature of the electrolyte is located, determine the target operating mode corresponding to the target temperature range;

[0008] The target DC-DC converter is controlled to operate based on the target operating mode.

[0009] The target temperature range is any one of multiple temperature ranges, and the heat generated by the switching losses of the target DC-DC converter varies under different operating modes corresponding to different temperature ranges.

[0010] In one embodiment, determining the target operating mode corresponding to the target temperature range based on the target temperature range of the real-time temperature of the electrolyte includes:

[0011] If the real-time temperature of the electrolyte is lower than the preset operating temperature, then the target operating mode is determined to be the hard-switching heating mode.

[0012] If the real-time temperature of the electrolyte is not lower than the preset operating temperature, then the target operating mode is determined to be the soft-switching mode.

[0013] In the hard-switching heating mode, the target DC-DC converter is controlled to operate outside the zero-voltage switching region in order to actively increase switching losses and generate Joule heat; in the soft-switching mode, the target DC-DC converter is controlled to maintain at the resonant frequency and operate in the zero-voltage switching region.

[0014] In one embodiment, determining the target operating mode as a hard-switching heating mode if the real-time temperature of the electrolyte is lower than the preset operating temperature includes:

[0015] If the real-time temperature of the electrolyte is lower than the cold start temperature threshold, the target operating mode is determined to be hard switch slow heating mode.

[0016] If the real-time temperature of the electrolyte is not lower than the cold start temperature threshold, then the target operating mode is determined to be the hard switch rapid heating mode.

[0017] Wherein, the cold start temperature threshold is less than the preset operating temperature; in the hard-switching rapid heating mode, the real-time heating rate reference value is limited to a set rapid heating rate, and the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency; in the hard-switching slow heating mode, the real-time heating rate reference value is limited to a set slow heating rate, and the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency; the slow heating rate is lower than the rapid heating rate.

[0018] In one embodiment, for the hard-switching heating mode, controlling the target DC-DC converter to operate based on the target operating mode includes:

[0019] Using the preset operating temperature as the outer loop temperature reference and the real-time electrolyte temperature as the outer loop temperature feedback, the real-time heating rate reference value of the inner loop is obtained by the first PI controller.

[0020] The real-time heating rate of the electrolyte is collected as the inner ring heating rate feedback. The rate deviation between the real-time heating rate reference value and the real-time heating rate of the electrolyte is input into the second PI controller for calculation to obtain the real-time switching frequency adjustment amount.

[0021] The real-time switching frequency adjustment is superimposed on the resonant frequency of the target DC-DC converter to obtain the real-time switching frequency;

[0022] The target DC-DC converter is controlled to operate according to the real-time switching frequency so that the target DC-DC converter can operate out of the zero-voltage switching region.

[0023] In one embodiment, for the soft-switching mode, controlling the target DC-DC converter to operate based on the target operating mode includes:

[0024] The real-time switching frequency of the target DC-DC converter is kept constant at its resonant frequency.

[0025] In one embodiment, after controlling the target DC-DC converter to operate based on the target operating mode, the method further includes: obtaining the real-time temperature of the electrolyte in the electrolytic cell unit; when the real-time temperature of the electrolyte is less than or equal to the hot start temperature threshold, the target operating mode can be switched from a soft-switching mode to a hard-switching rapid heating mode.

[0026] In one embodiment, the hydrogen production system further includes a temperature detection module installed at the target location for detecting the real-time temperature of the electrolyte in the electrolyzer unit. The target location includes at least one of the following:

[0027] The inlet of the electrolytic cell unit, the outlet of the electrolytic cell unit, the cavity of the electrolytic cell unit, and the middle section of the electrolyte circulation loop.

[0028] In one embodiment, the thermal coupling method between the target DC-DC converter and the electrolyte circulation loop includes at least one of the following:

[0029] Fill the gaps with a highly thermally conductive material;

[0030] Install heat pipe heat transfer components;

[0031] Arrange air ducts to guide hot air heating structures; install embedded heating plates, which are attached to the outer wall of the DC-DC converter power module or electrolyte circulation pipeline;

[0032] A heat conduction structure with a shared metal substrate is used to directly and physically bond the power module of the DC-DC converter to the electrolyte circulation pipeline.

[0033] Secondly, this application also provides an electrolyte temperature control device for a hydrogen production system.

[0034] The hydrogen production system includes: a photovoltaic unit, an energy storage unit, an electrolyzer unit, an electrolyte circulation loop connecting the electrolyzer unit, and a target DC-DC converter. The distance between the target DC-DC converter and the electrolyte circulation loop is less than a preset distance. The target DC-DC converter includes: a DC-DC converter connected between the photovoltaic unit and the energy storage unit, and / or a DC-DC converter connected between the energy storage unit and the electrolyzer unit. The device includes:

[0035] The acquisition module is used to acquire the real-time temperature of the electrolyte in the electrolytic cell unit;

[0036] The working mode determination module is used to determine the target working mode corresponding to the target temperature range based on the target temperature range where the real-time temperature of the electrolyte is located.

[0037] The control module is used to control the target DC-DC converter to operate based on the target operating mode;

[0038] The target temperature range is any one of multiple temperature ranges, and the heat generated by the switching losses of the target DC-DC converter varies under different operating modes corresponding to different temperature ranges.

[0039] Thirdly, this application also provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method described in the first aspect.

[0040] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect.

[0041] Fifthly, this application also provides a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect.

[0042] The aforementioned hydrogen production system includes an electrolyte temperature control method, apparatus, computer equipment, computer-readable storage medium, and computer program product. The hydrogen production system comprises: a photovoltaic unit, an energy storage unit, an electrolyzer unit, an electrolyte circulation loop connecting the electrolyzer unit, and a target DC-DC converter. The distance between the target DC-DC converter and the electrolyte circulation loop is less than a preset distance. The target DC-DC converter includes: a DC-DC converter connected between the photovoltaic unit and the energy storage unit, and / or a DC-DC converter connected between the energy storage unit and the electrolyzer unit. In this method, the real-time temperature of the electrolyte in the electrolyzer unit can be obtained; based on the target temperature range where the real-time electrolyte temperature is located, a target operating mode corresponding to the target temperature range is determined; and the target DC-DC converter is controlled to operate based on the target operating mode. The target temperature range can be any temperature range from multiple temperature ranges, and the heat generated by the target DC-DC converter differs under different operating modes corresponding to different temperature ranges. This scheme allows for real-time acquisition of the electrolyte temperature within the electrolyzer unit of the hydrogen production system. Based on the target temperature range of the electrolyte's real-time temperature, a corresponding target operating mode is matched. This enables control of the target DC-DC converters (including the DC-DC converter between the photovoltaic unit and the energy storage unit, and / or the DC-DC converter between the energy storage unit and the electrolyzer unit) located less than a preset distance from the electrolyte circulation loop to operate in that mode. Utilizing the heat differences generated by the converters under different operating modes, and leveraging the proximity of the converters to the electrolyte circulation loop, the electrolyte temperature is regulated, ensuring the electrolyzer remains within a suitable operating temperature range. This improves the operating efficiency and stability of the hydrogen production system, while simultaneously fully integrating the synergistic effects of photovoltaic power generation, energy storage, and electrolysis hydrogen production to optimize energy utilization efficiency. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic flowchart of an electrolyte temperature control method for a hydrogen production system in one embodiment;

[0045] Figure 2 This is a control schematic diagram of a hard-switching slow heating mode in one embodiment;

[0046] Figure 3 This is a control schematic diagram of a hard-switching rapid heating mode in one embodiment;

[0047] Figure 4 This is a control schematic diagram of a soft-switching mode in one embodiment;

[0048] Figure 5 This is a schematic diagram of the electrolyte temperature control method in another embodiment of the hydrogen production system;

[0049] Figure 6 This is a structural block diagram of the electrolyte temperature control device in a hydrogen production system according to one embodiment.

[0050] Figure 7 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0052] Currently, hydrogen production systems face significant technical limitations in low-temperature environments. Electrolyzers face difficulties in cold start-up, and the associated preheating solutions have numerous shortcomings. Firstly, in low-temperature environments, the electrolyte viscosity increases significantly, and the ion migration rate decreases drastically. Direct start-up not only leads to low hydrogen production efficiency but may also cause irreversible damage to the internal structure of the electrolyzer. Therefore, the electrolyte typically needs to be preheated to 60-80°C before it can enter normal operating conditions. Secondly, existing technologies generally use independent electric heaters to preheat the electrolyte. This method requires additional heating elements, control circuits, and safety protection modules, increasing system complexity and hardware costs, occupying significant installation space, and hindering modular and integrated system layout. Furthermore, independent heaters only function during the cold start phase, resulting in low overall equipment utilization. Their operation relies on energy storage batteries, consuming valuable electrical energy and reducing overall system energy efficiency. Especially in cold regions with insufficient sunlight, the energy consumption during the preheating phase significantly reduces the effective operating time of the hydrogen production system.

[0053] To address the aforementioned issues, this application provides a hydrogen production system and a method for controlling the electrolyte temperature within the system. This method controls the operating mode of the DC-DC converter in the hydrogen production system, actively utilizing the switching losses of the DC-DC converter to generate heat during the heating process to assist in heating the electrolyte, thereby replacing or reducing reliance on external heaters. The control system adjusts the switching frequency and duty cycle of the DC-DC converter based on the ambient temperature and the electrolyzer's startup requirements, causing it to operate in a low-efficiency mode during heating. This actively increases switching losses to generate Joule heat, which is transferred to the electrolyte through a heat-conducting structure, achieving rapid temperature rise. Once the electrolyte reaches the optimal reaction temperature, the system automatically switches to a high-efficiency operating mode, restoring optimal energy utilization. This technology integrates energy management and thermal management, improving system integration and low-temperature adaptability, and enabling waste heat reuse and start-up without auxiliary heating.

[0054] The hydrogen production system provided in this application embodiment may include: a photovoltaic unit, an energy storage unit, an electrolyzer unit, an electrolyte circulation loop connected to the electrolyzer unit, and a target DC-DC converter.

[0055] The distance between the target DC-DC converter and the electrolyte circulation loop is less than a preset distance. The target DC-DC converter includes: a DC-DC converter connected between the photovoltaic unit and the energy storage unit, and / or a DC-DC converter connected between the energy storage unit and the electrolyzer unit.

[0056] The aforementioned photovoltaic unit is used to collect solar energy and convert it into DC power.

[0057] The aforementioned energy storage unit is used to store surplus photovoltaic energy (the DC power remaining after the photovoltaic unit supplies power to the electrolytic cell unit), or to supplement the power supply to the electrolytic cell unit when the output of the photovoltaic unit is insufficient.

[0058] The aforementioned electrolyzer unit can perform water electrolysis to generate hydrogen and oxygen. The electrolyzer unit can be alkaline or proton exchange membrane (PEM) type.

[0059] The aforementioned target DC-DC converter can be connected between the photovoltaic unit and the energy storage unit, and / or between the energy storage unit and the electrolytic cell unit, and can realize voltage conversion and power regulation.

[0060] For example, the target DC-DC converter can adopt a bidirectional full-bridge inductor-inductor-capacitor (LLC) resonant topology to support bidirectional energy flow. For instance, the power modules of the DC-DC converter are arranged adjacent to the electrolyte stainless steel pipe, with the spacing set to be less than a preset distance. This preset distance can be 9mm, 10mm, 11mm, etc.; the power modules can be, for example, metal-oxide-semiconductor field-effect transistors (MOSFETs), transformers, etc.

[0061] The DC-DC converter topology can also be replaced with other structures that support soft / hard switching, such as phase-shifted full-bridge, buck-boost converter, single-ended primary inductor converter (SEPIC), etc., and is not limited to the LLC resonant topology mentioned above.

[0062] In some embodiments, the thermal coupling method between the target DC-DC converter and the electrolyte circulation loop includes, but is not limited to, at least one of the following:

[0063] 1) Fill the gap between the target DC-DC converter and the electrolyte circulation loop with a high thermal conductivity material. For example, fill the gap between the target DC-DC converter and the electrolyte circulation loop with a high thermal conductivity material such as thermal grease or thermal pads.

[0064] 2) Install heat pipe heat transfer components.

[0065] 3) Arrange the air duct to guide the hot air heating structure; install an embedded heating plate, which is attached to the outer wall of the DC-DC converter power module or the electrolyte circulation pipeline.

[0066] 4) A shared metal substrate heat conduction structure is used to directly and physically bond the power module of the target DC-DC converter to the electrolyte circulation pipeline. For example, a shared heat conduction structure, such as an aluminum heat sink, can be used to achieve efficient heat conduction.

[0067] In some embodiments, the electrolyte circulation loop described above is connected to the electrolytic cell unit to supply electrolyte to the electrolytic cell unit and maintain its temperature stability.

[0068] In some embodiments, the hydrogen production system described above may further include a temperature detection module. This temperature detection module is installed at a target location for detecting the real-time temperature of the electrolyte in the electrolyzer unit. The target location may include, but is not limited to, at least one of the following:

[0069] The inlet of the electrolytic cell unit, the outlet of the electrolytic cell unit, the cavity of the electrolytic cell unit, and the middle section of the electrolyte circulation loop.

[0070] In some embodiments, the hydrogen production system described above may further include: a central controller, which may be implemented using a digital signal processor (DSP), a microcontroller, or other real-time processor, and its implementation is not limited to embedded systems, such as Digital Signal Processor (ARM) and Field-Programmable Gate Array (FPGA) architectures.

[0071] For example, the temperature sensor described above can be installed at the inlet of the electrolyzer and provide real-time feedback of the temperature (i.e., the real-time temperature of the electrolyte) to the central controller. The central controller can implement the electrolyte temperature control method of the hydrogen production system provided in this embodiment using a preset control algorithm.

[0072] It should be noted that the electrolyte temperature control method of the hydrogen production system provided in this application embodiment can also be implemented by other computer devices besides the central controller mentioned above. The computer device can be connected to the temperature sensor and the target DC-DC converter in the hydrogen production system.

[0073] In one exemplary embodiment, such as Figure 1 The diagram illustrates a process flow chart for controlling the electrolyte temperature in a hydrogen production system. This method is applied to the hydrogen production system described in the above embodiments, and the process flow may include, but is not limited to, the following steps:

[0074] 101. Obtain the real-time temperature of the electrolyte in the electrolytic cell unit.

[0075] Specifically, temperature sensors (such as thermistors and thermocouples) deployed in the electrolyte circulation loop or inside the electrolytic cell can collect electrolyte temperature data in real time and transmit the temperature data to the central controller, enabling the central controller to obtain the real-time electrolyte temperature in the electrolytic cell unit. Here, real-time electrolyte temperature refers to the instantaneous actual temperature of the electrolyte during the operation of the electrolytic cell.

[0076] 102. Determine the target operating mode corresponding to the target temperature range based on the real-time temperature of the electrolyte.

[0077] The target temperature range can be any one of several temperature ranges. Different temperature ranges correspond to different operating modes of the target DC-DC converter.

[0078] For example, the target temperature range mentioned above can be any temperature range among a plurality of pre-divided continuous temperature intervals. For example: a low temperature interval below the cold start temperature threshold, a hot start operating interval below the preset operating temperature but not below the cold start temperature threshold, and a normal operating interval not below the preset operating temperature.

[0079] The different operating modes of the target DC-DC converter corresponding to the different temperature ranges mentioned above can refer to the operating modes that are matched for each temperature range and enable the target DC-DC converter to generate the corresponding heat.

[0080] This involves comparing the collected real-time electrolyte temperature with multiple preset temperature ranges to determine its corresponding range and then selecting the appropriate operating mode. Different operating modes for different temperature ranges can be achieved by adjusting the converter's operating parameters to change its switching losses, thereby controlling heat generation.

[0081] In some embodiments, determining the target operating mode corresponding to the target temperature range based on the real-time temperature of the electrolyte may include, but is not limited to, the following:

[0082] Case 1: If the real-time temperature of the electrolyte is lower than the preset operating temperature, the target operating mode is determined to be the hard-switching heating mode.

[0083] In the hard-switching heating mode, the target DC-DC converter is controlled to operate outside the zero-voltage switching region in order to actively increase switching losses and generate Joule heat.

[0084] The aforementioned hard-switching heating mode refers to the operating mode in which the target DC-DC converter operates outside the zero-voltage switching (ZVS) region. The characteristic of hard-switching heating mode is that the switching transistor is turned on or off in a non-zero voltage or non-zero current state, resulting in significant switching losses. These losses are released in the form of Joule heat, thereby heating the electrolyte.

[0085] In the implementation of Case 1, when the real-time temperature of the electrolyte is detected to be lower than the preset operating temperature, the target operating mode is determined to be the hard-switching heating mode. The core implementation logic is to control the target DC-DC converter to actively operate away from the zero-voltage switching region, so that the target DC-DC converter generates higher switching losses during the switching process. These losses are converted into Joule heat, which heats the electrolyte and causes its temperature to rise back to the preset operating temperature range.

[0086] Case 2: If the real-time temperature of the electrolyte is not lower than the preset operating temperature, then the target operating mode is determined to be soft-switching mode.

[0087] In soft-switching mode, the target DC-DC converter operates in the zero-voltage switching region.

[0088] The aforementioned soft-switching mode refers to the operating mode in which the DC-DC converter operates in the zero-voltage switching (ZVS) region. The characteristic of soft-switching mode is that the switching transistor is turned on when the voltage is zero or turned off when the current is zero, significantly reducing switching losses and heat generation. It is suitable for scenarios where the electrolyte temperature reaches the normal operating range, prioritizing the high-efficiency and low-power operation of the converter.

[0089] In the implementation of scenario 2, the target DC-DC converter is stably operated in the zero-voltage switching region through the control strategy, so that the switching transistor completes the conduction or turn-off action when the voltage is zero, minimizing switching losses and reducing additional heat generation. At this time, the converter operates in a state of high efficiency and low loss, meeting the normal power supply requirements of the hydrogen production system.

[0090] In some embodiments, the above-described situation 1 may also include, but is not limited to, the following specific situations:

[0091] Case 1a: If the real-time temperature of the electrolyte is lower than the cold start temperature threshold, then the target operating mode is determined to be hard switch slow heating mode.

[0092] The cold start temperature threshold is lower than the preset operating temperature. This cold start temperature threshold is a temperature range below the preset operating temperature, used to distinguish between two heating requirements of the electrolyte at low temperatures: when the temperature is below this threshold, the electrolyte is in an extremely low temperature state and needs to be heated slowly to avoid thermal shock; when the temperature is above this threshold but below the preset operating temperature, it can be heated quickly to shorten the heating time.

[0093] In hard-switching slow heating mode, the real-time heating rate reference value is limited to the set slow heating rate, while the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency.

[0094] The resonant frequency is the inherent frequency of the resonant circuit in the target DC-DC converter. When the switching frequency of the target DC-DC converter is equal to the resonant frequency, zero-voltage switching is easily achieved. When the switching frequency is higher than the resonant frequency, the DC-DC converter will leave the zero-voltage switching region and enter a hard-switching state, thereby generating switching losses for heating.

[0095] In the implementation of the above situation 1a, when the real-time temperature of the electrolyte is lower than the cold start temperature threshold, the system determines the target working mode as hard-switching slow heating mode. To achieve this, two conditions must be met simultaneously: First, the reference value of the real-time heating rate of the electrolyte must be strictly limited to the set slow heating rate to prevent thermal shock of the extremely low temperature electrolyte due to excessively rapid heating; second, the real-time switching frequency of the target DC-DC converter must be controlled to be higher than its resonant frequency, forcing the converter to leave the zero-voltage switching region and enter the hard-switching state to generate Joule heating, thereby achieving slow heating of the electrolyte.

[0096] Case 1b: If the real-time electrolyte temperature is not lower than the cold start temperature threshold, then the target operating mode is determined to be the hard-switching rapid heating mode.

[0097] In hard-switching rapid heating mode, the real-time heating rate reference value is limited to the set rapid heating rate, and the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency; in hard-switching slow heating mode, the real-time heating rate reference value is limited to the set slow heating rate, and the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency; the slow heating rate is lower than the rapid heating rate.

[0098] Among them, the slow heating rate is lower than the rapid heating rate.

[0099] In this embodiment, the heating rate reference value is the upper limit of the rate during the electrolyte heating process. It is divided into slow heating rate and fast heating rate, and the slow heating rate is lower than the fast heating rate. By limiting the heating rate, the performance degradation or structural damage of the electrolyte due to a sudden increase in temperature can be avoided.

[0100] In the implementation of the above situation 1b, the real-time heating rate reference value of the electrolyte is limited to the set rapid heating rate (which is higher than the slow heating rate) to improve the heating efficiency while avoiding damage to the electrolyte from a sudden temperature rise; at the same time, the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency, so that it maintains a hard switching operation state, and heat is generated through switching losses to quickly raise the electrolyte temperature to the preset operating temperature.

[0101] For example, the central controller can classify the system operating mode into three types based on the real-time electrolyte temperature: hard-switching rapid heating mode, hard-switching slow heating mode, and soft-switching mode. It sets a cold start temperature threshold Tc (e.g., 40°C) and a preset operating temperature Tnor (e.g., 60°C), and reads data from the temperature detection module to obtain the real-time electrolyte temperature Te(t). If Te(t) < Tc, the system is in the cold start stage and enters the hard-switching slow heating mode (the overall temperature of the electrolyzer is low, and internal components such as electrodes, diaphragms, and sealing materials are in a contracted state; if heating is too rapid, the difference in thermal expansion coefficients of different materials will cause stress concentration and damage to the electrolyzer components). If Tc ≤ Te(t) < Tnor, the system is in the hot start stage and enters the hard-switching rapid heating mode (the electrolyte viscosity decreases, convection is enhanced, the system's thermal conductivity improves, and it can withstand faster heating without generating excessive temperature differences). If Te(t) ≥ Tnor, the system hot start is complete, and it enters the soft-switching mode (ensuring continuous and efficient operation of the DC-DC converter and electrolyzer).

[0102] For example, the specific temperature values ​​of the above-mentioned cold start temperature threshold Tc (e.g., 40°C) and preset operating temperature Tnor (e.g., 60°C) are all exemplary descriptions and can be other values ​​in actual applications. This application embodiment does not limit them.

[0103] 103. Control the operation of the target DC-DC converter based on the target operating mode.

[0104] The heat generated by the switching losses of the target DC-DC converter varies under different operating modes corresponding to different temperature ranges.

[0105] The aforementioned switching losses can be the energy losses generated by the switching transistors (such as MOSFETs) in the DC-DC converter during the instantaneous turn-on and turn-off, which are ultimately dissipated as heat. Based on the target operating mode determined in step 102, parameters such as the converter's switching frequency, duty cycle, and soft-switching / hard-switching state can be adjusted to change the heat generated by its switching losses. Since the distance between the target DC-DC converter and the electrolyte circulation loop is less than a preset distance, the heat generated can be directly transferred to the electrolyte, achieving temperature control of the electrolyte. For example, a high-heat-generating operating mode is used in the low-temperature range to preheat the electrolyte; a low-heat-generating, high-efficiency mode is used in the normal operating range to maintain temperature stability.

[0106] In some embodiments, for hard-switching heating mode, controlling the target DC-DC converter to operate based on the target operating mode may include, but is not limited to, the following steps:

[0107] (1) Based on the preset working temperature and the real-time temperature of the electrolyte, determine the reference value of the real-time heating rate.

[0108] The preset operating temperature is used as the outer ring temperature reference, and the real-time electrolyte temperature is used as the outer ring temperature feedback. The real-time heating rate reference value is obtained by the first PI controller.

[0109] (2) Based on the collected real-time heating rate of the electrolyte and the reference value of the real-time heating rate, determine the real-time switching frequency adjustment amount.

[0110] The real-time heating rate of the electrolyte is collected as the inner loop heating rate feedback. The rate deviation between the real-time heating rate reference value and the real-time heating rate of the electrolyte is input into the second PI controller for calculation to obtain the real-time switching frequency adjustment amount.

[0111] (3) Determine the real-time switching frequency based on the real-time switching frequency adjustment and the resonant frequency of the target DC-DC converter.

[0112] The real-time switching frequency is obtained by superimposing the real-time switching frequency adjustment with the resonant frequency of the target DC-DC converter.

[0113] (4) Control the target DC-DC converter to operate according to the real-time switching frequency so that the target DC-DC converter can operate out of the zero-voltage switching region.

[0114] For example, taking a bidirectional full-bridge LLC resonant topology, if the real-time electrolyte temperature Te(t) is lower than the preset operating temperature Tnor, the real-time switching frequency adjustment Δfs(t) obtained through the loop will be positive, and the real-time switching frequency fs(t) will be higher than the resonant frequency fr, forcing the DC-DC converter to operate outside the ZVS region.

[0115] For example, taking a bidirectional full-bridge LLC resonant topology, when operating in hard-switching slow heating mode or hard-switching fast heating mode, a loop control method is adopted. The preset operating temperature Tnor is used as the outer loop temperature reference, and the real-time electrolyte temperature Te(t) is used as the outer loop temperature feedback. The real-time heating rate reference Vref(t) is obtained through the first PI controller. Then, the real-time electrolyte heating rate Ve(t) is used as the inner loop heating rate feedback. The rate deviation between the real-time heating rate reference value and the real-time electrolyte heating rate is obtained through the second PI controller to obtain the real-time switching frequency adjustment Δfs(t). The resonant frequency fr is superimposed on the real-time switching frequency adjustment Δfs(t) to obtain the real-time switching frequency fs(t).

[0116] For example, taking the above-mentioned bidirectional full-bridge LLC resonant topology as an example, when operating in hard-switching slow heating mode, the real-time heating rate reference Vref(t) obtained by the outer loop is limited to within the set slow heating rate Vs (e.g., 1.0°C / min). Figure 2The diagram shows a control schematic for a hard-switching slow heating mode; however, when the system operates in hard-switching fast heating mode, the real-time heating rate reference Vref(t) obtained from the outer loop is limited to within the set fast heating rate Vf (e.g., 3.0°C / min). Figure 3 The diagram shown is a control schematic of a hard-switching rapid heating mode.

[0117] In some embodiments, when controlling the target DC-DC converter to operate based on the target operating mode in a soft-switching mode, the real-time switching frequency of the target DC-DC converter can be kept constant at its resonant frequency.

[0118] For example, taking the above bidirectional full-bridge LLC resonant topology as an example, when operating in soft-switching mode, the real-time heating rate reference Vref(t) obtained by the outer loop is limited to the set rapid heating rate Vf (e.g., 3.0°C / min), and at this time fs(t) = fr. Figure 4 This is a control diagram for a soft-switching mode.

[0119] The electrolyte temperature control method of the hydrogen production system in the above embodiments can acquire the temperature of the electrolyte in the electrolyzer unit of the hydrogen production system in real time, match the corresponding target working mode according to the target temperature range to which the real-time electrolyte temperature belongs, and then control the target DC-DC converter (including the DC-DC converter between the photovoltaic unit and the energy storage unit, and / or the DC-DC converter between the energy storage unit and the electrolyzer unit) that is less than a preset distance from the electrolyte circulation loop to work in this mode. By utilizing the heat difference generated by the converter under different working modes and taking advantage of the proximity between the converter and the electrolyte circulation loop, the electrolyte temperature can be regulated to ensure that the electrolyzer is always in a suitable working temperature range, improve the operating efficiency and stability of the hydrogen production system, and fully integrate the synergistic effect of photovoltaic power generation, energy storage and electrolysis hydrogen production links to optimize the system's energy utilization efficiency.

[0120] In this embodiment of the application, flexible switching between various working modes is also supported.

[0121] In one exemplary embodiment, such as Figure 5 The diagram shows a flow chart of a method for controlling the electrolyte temperature in a hydrogen production system. This method may include, but is not limited to, the following steps:

[0122] 501. Obtain the real-time temperature of the electrolyte in the electrolytic cell unit.

[0123] 502. Determine whether the real-time temperature of the electrolyte is lower than the cold start temperature threshold.

[0124] If the real-time temperature of the electrolyte is lower than the cold start temperature threshold, continue to execute step 503. If the real-time temperature of the electrolyte is not lower than the cold start temperature threshold, continue to execute steps 504 to 507.

[0125] 503. Determined to be hard-switching slow heating mode.

[0126] 504. Determine whether the real-time temperature of the electrolyte is lower than the preset operating temperature.

[0127] If the real-time temperature of the electrolyte is lower than the preset working temperature, continue to execute step 505; if the real-time temperature of the electrolyte is not lower than the preset working temperature, continue to execute steps 506 and 507.

[0128] 505. Determined to be in hard-switching rapid heating mode.

[0129] 506. Determined to be in soft switch mode.

[0130] 507. Determine whether the real-time temperature of the electrolyte is less than or equal to the thermal start-up temperature threshold.

[0131] The aforementioned hot start temperature threshold is a temperature threshold between the cold start temperature threshold and the preset operating temperature. It serves as the basis for switching between soft switch mode and hard switch rapid heating mode. When the real-time temperature of the electrolyte drops to or below the hot start temperature threshold in soft switch mode, the system switches to hard switch rapid heating mode.

[0132] If the real-time temperature of the electrolyte is less than or equal to the thermal start temperature threshold, return to step 505; if the real-time temperature of the electrolyte is greater than the thermal start temperature threshold, return to step 506.

[0133] In some embodiments, when operating in soft-switching mode, the real-time temperature of the electrolyte can be obtained. If the real-time temperature of the electrolyte (Ve(t)) is less than or equal to the thermal start temperature threshold (Th), the target operating mode can be switched from soft-switching mode to hard-switching rapid heating mode.

[0134] For example, the thermal start temperature threshold Tc can be set to 50°C. This specific temperature value is an exemplary description and can be other values ​​in actual applications. This application embodiment does not limit the specific value.

[0135] The electrolyzer temperature control method for the hydrogen production system described in the above embodiment first determines the relationship between the real-time electrolyte temperature and the cold start temperature threshold, and then further determines the relationship with the preset operating temperature. This accurately classifies the system into three operating modes: hard-switching slow heating, hard-switching fast heating, and soft-switching. Simultaneously, a hot start temperature threshold is added as the basis for switching between the soft-switching mode and the hard-switching fast heating mode, forming a closed-loop judgment logic. This not only achieves precise matching and flexible switching of operating modes under different temperature scenarios, ensuring that slow heating at extremely low temperatures avoids damage to the electrolyzer components due to thermal shock, rapid heating at medium and low temperatures shortens the heating time, and efficient and low-consumption operation at normal temperatures, but also responds promptly to electrolyte temperature fluctuations through closed-loop feedback, ensuring that the electrolyzer temperature remains stable within a reasonable range. This improves the reliability, efficiency, and accuracy of temperature control in the hydrogen production system.

[0136] The technical effects of the technical solutions provided in the embodiments of this application may include, but are not limited to:

[0137] (1) Solve the problem of equipment redundancy: No need to configure a dedicated electric heater and its control circuit, the system structure is simpler and the material cost is reduced.

[0138] (2) Solve the space occupation problem: Eliminate the heating module to save internal space, which is conducive to achieving high power density and modular design.

[0139] (3) Solve the problem of energy waste: convert the "waste heat" of the DC-DC converter into useful heat energy during the start-up phase, realize the cascade utilization of energy, and improve the overall energy efficiency.

[0140] (4) Solve the problem of slow start-up at low temperature: The electrolyte heating rate is significantly accelerated by the active heat generation strategy.

[0141] (5) Solve the problem of single control: Propose a dual-mode switching strategy of hard switching and soft switching to balance fast response and efficient operation.

[0142] (6) Improve the intelligence level of the system: realize fully automatic mode switching based on temperature feedback to adapt to different environmental conditions.

[0143] (7) Enhance system reliability: reduce heater failure points and reduce maintenance requirements.

[0144] (8) Support the concept of green and low carbon: reduce additional energy consumption and improve the utilization rate of renewable energy.

[0145] (9) It has good scalability: This strategy can be extended to other power electronic systems with cold start requirements, such as fuel cells and energy storage converters.

[0146] Based on the same inventive concept, this application also provides an electrolyte temperature control device for implementing the electrolyte temperature control method of the hydrogen production system described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more embodiments of the electrolyte temperature control device for hydrogen production systems provided below can be found in the limitations of the electrolyte temperature control method for hydrogen production systems described above, and will not be repeated here.

[0147] In one exemplary embodiment, such as Figure 6 As shown, an electrolyte temperature control device for a hydrogen production system is provided. The hydrogen production system includes: a photovoltaic unit, an energy storage unit, an electrolyzer unit, an electrolyte circulation loop connected to the electrolyzer unit, and a target DC-DC converter. The distance between the target DC-DC converter and the electrolyte circulation loop is less than a preset distance. The target DC-DC converter includes: a DC-DC converter connected between the photovoltaic unit and the energy storage unit, and / or a DC-DC converter connected between the energy storage unit and the electrolyzer unit. The device includes:

[0148] The acquisition module 601 is used to acquire the real-time temperature of the electrolyte in the electrolytic cell unit;

[0149] The working mode determination module 602 is used to determine the target working mode corresponding to the target temperature range based on the target temperature range where the real-time temperature of the electrolyte is located.

[0150] Control module 603 is used to control the target DC-DC converter to operate based on the target operating mode;

[0151] The target temperature range is any one of multiple temperature ranges, and the heat generated by the switching losses of the target DC-DC converter varies under different operating modes corresponding to different temperature ranges.

[0152] In some embodiments, the operating mode determination module 602 is specifically used for:

[0153] If the real-time temperature of the electrolyte is lower than the preset operating temperature, then the target operating mode is determined to be the hard-switching heating mode.

[0154] If the real-time temperature of the electrolyte is not lower than the preset operating temperature, then the target operating mode is determined to be the soft-switching mode.

[0155] In the hard-switching heating mode, the target DC-DC converter is controlled to operate outside the zero-voltage switching region in order to actively increase switching losses and generate Joule heat; in the soft-switching mode, the target DC-DC converter is controlled to maintain at the resonant frequency and operate in the zero-voltage switching region.

[0156] In some embodiments, the operating mode determination module 602 is specifically used for:

[0157] If the real-time temperature of the electrolyte is lower than the cold start temperature threshold, the target operating mode is determined to be hard switch slow heating mode.

[0158] If the real-time temperature of the electrolyte is not lower than the cold start temperature threshold, then the target operating mode is determined to be the hard switch rapid heating mode.

[0159] Wherein, the cold start temperature threshold is less than the preset operating temperature; in the hard-switching rapid heating mode, the real-time heating rate reference value is limited to a set rapid heating rate, and the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency; in the hard-switching slow heating mode, the real-time heating rate reference value is limited to a set slow heating rate, and the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency; the slow heating rate is lower than the rapid heating rate.

[0160] In some embodiments, for the hard-switching heating mode, the control module 603 is specifically used for:

[0161] Using the preset operating temperature as the outer loop temperature reference and the real-time electrolyte temperature as the outer loop temperature feedback, the real-time heating rate reference value of the inner loop is obtained by the first PI controller.

[0162] The real-time heating rate of the electrolyte is collected as the inner ring heating rate feedback. The rate deviation between the real-time heating rate reference value and the real-time heating rate of the electrolyte is input into the second PI controller for calculation to obtain the real-time switching frequency adjustment amount.

[0163] The real-time switching frequency adjustment is superimposed on the resonant frequency of the target DC-DC converter to obtain the real-time switching frequency;

[0164] The target DC-DC converter is controlled to operate according to the real-time switching frequency so that the target DC-DC converter can operate out of the zero-voltage switching region.

[0165] In some embodiments, for the soft-switching mode, the control module 603 is specifically used for:

[0166] The real-time switching frequency of the target DC-DC converter is kept constant at its resonant frequency.

[0167] In some embodiments, the device further includes a switching module, configured to switch the target operating mode from a soft-switching mode to a hard-switching rapid heating mode when the real-time temperature of the electrolyte is less than or equal to the hot-start temperature threshold.

[0168] In some embodiments, the hydrogen production system further includes a temperature detection module installed at the target location for detecting the real-time temperature of the electrolyte in the electrolyzer unit. The target location includes at least one of the following:

[0169] The inlet of the electrolytic cell unit, the outlet of the electrolytic cell unit, the cavity of the electrolytic cell unit, and the middle section of the electrolyte circulation loop.

[0170] In some embodiments, the thermal coupling method between the target DC-DC converter and the electrolyte circulation loop includes at least one of the following:

[0171] Fill the gaps with a highly thermally conductive material;

[0172] Install heat pipe heat transfer components;

[0173] Arrange air ducts to guide hot air heating structures; install embedded heating plates, which are attached to the outer wall of the DC-DC converter power module or electrolyte circulation pipeline;

[0174] A heat conduction structure with a shared metal substrate is used to directly and physically bond the power module of the DC-DC converter to the electrolyte circulation pipeline.

[0175] Each module in the electrolyte temperature control device of the aforementioned hydrogen production system can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0176] In one exemplary embodiment, a computer device is provided, the internal structure of which can be as shown in the figure. Figure 7As shown, this computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The database stores data. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communicating with external terminals via a network. When executed by the processor, the computer program implements a method for controlling the electrolyte temperature in a hydrogen production system.

[0177] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0178] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the various processes shown in the above method embodiments.

[0179] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the various processes shown in the above method embodiments.

[0180] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the various processes shown in the above method embodiments.

[0181] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0182] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0183] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for controlling the electrolyte temperature in a hydrogen production system, characterized in that, The hydrogen production system includes: a photovoltaic unit, an energy storage unit, an electrolyzer unit, an electrolyte circulation loop connected to the electrolyzer unit, and a target DC-DC converter. The distance between the target DC-DC converter and the electrolyte circulation loop is less than a preset distance. The target DC-DC converter includes: a DC-DC converter connected between the photovoltaic unit and the energy storage unit, and / or a DC-DC converter connected between the energy storage unit and the electrolyzer unit. The method includes: Obtain the real-time temperature of the electrolyte in the electrolytic cell unit; Based on the target temperature range where the real-time temperature of the electrolyte is located, determine the target operating mode corresponding to the target temperature range; The target DC-DC converter is controlled to operate based on the target operating mode. The target temperature range is any one of multiple temperature ranges, and the heat generated by the switching losses of the target DC-DC converter varies under different operating modes corresponding to different temperature ranges.

2. The method according to claim 1, characterized in that, The step of determining the target operating mode corresponding to the target temperature range based on the real-time temperature of the electrolyte includes: If the real-time temperature of the electrolyte is lower than the preset operating temperature, then the target operating mode is determined to be the hard-switching heating mode. If the real-time temperature of the electrolyte is not lower than the preset operating temperature, then the target operating mode is determined to be the soft-switching mode. In the hard-switching heating mode, the target DC-DC converter is controlled to operate outside the zero-voltage switching region in order to actively increase switching losses and generate Joule heat; in the soft-switching mode, the target DC-DC converter is controlled to operate in the zero-voltage switching region.

3. The method according to claim 2, characterized in that, For the hard-switching heating mode, controlling the target DC-DC converter to operate based on the target operating mode includes: Based on the preset operating temperature and the real-time temperature of the electrolyte, a reference value for the real-time heating rate is determined. Based on the collected real-time heating rate of the electrolyte and the reference value of the real-time heating rate, the real-time switching frequency adjustment amount is determined. The real-time switching frequency is determined based on the real-time switching frequency adjustment and the resonant frequency of the target DC-DC converter; The target DC-DC converter is controlled to operate according to the real-time switching frequency so that the target DC-DC converter can operate out of the zero-voltage switching region.

4. The method according to claim 2, characterized in that, For the soft-switching mode, controlling the target DC-DC converter to operate based on the target operating mode includes: The real-time switching frequency of the target DC-DC converter is kept constant at its resonant frequency.

5. The method according to claim 2, characterized in that, If the real-time temperature of the electrolyte is lower than the preset operating temperature, then determining the target operating mode as a hard-switching heating mode includes: If the real-time temperature of the electrolyte is lower than the cold start temperature threshold, the target operating mode is determined to be hard switch slow heating mode. If the real-time temperature of the electrolyte is not lower than the cold start temperature threshold, then the target operating mode is determined to be the hard switch rapid heating mode. Wherein, the cold start temperature threshold is less than the preset operating temperature; in the hard-switching rapid heating mode, the real-time heating rate reference value is limited to a set rapid heating rate, and the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency; in the hard-switching slow heating mode, the real-time heating rate reference value is limited to a set slow heating rate, and the real-time switching frequency of the target DC-DC converter is controlled to be higher than the resonant frequency; the slow heating rate is lower than the rapid heating rate.

6. The method according to claim 4, characterized in that, After controlling the target DC-DC converter to operate based on the target operating mode, the method further includes: Obtain the real-time temperature of the electrolyte in the electrolytic cell unit; When the real-time temperature of the electrolyte is less than or equal to the thermal start temperature threshold, the target operating mode can be switched from soft-switching mode to hard-switching rapid heating mode.

7. The method according to claim 1, characterized in that, The hydrogen production system also includes a temperature detection module, which is installed at a target location to detect the real-time temperature of the electrolyte in the electrolyzer unit. The target location includes at least one of the following: The inlet of the electrolytic cell unit, the outlet of the electrolytic cell unit, the cavity of the electrolytic cell unit, and the middle section of the electrolyte circulation loop.

8. The method according to any one of claims 1 to 7, characterized in that, The thermal coupling method between the target DC-DC converter and the electrolyte circulation loop includes at least one of the following: Fill the gaps with a highly thermally conductive material; Install heat pipe heat transfer components; Arrange air ducts to guide hot air heating structures; install embedded heating plates, which are attached to the outer wall of the DC-DC converter power module or electrolyte circulation pipeline. A heat conduction structure with a shared metal substrate is used to directly and physically bond the power module of the DC-DC converter to the electrolyte circulation pipeline.

9. An electrolyte temperature control device for a hydrogen production system, characterized in that, The hydrogen production system includes: a photovoltaic unit, an energy storage unit, an electrolyzer unit, an electrolyte circulation loop connecting the electrolyzer unit, and a target DC-DC converter. The distance between the target DC-DC converter and the electrolyte circulation loop is less than a preset distance. The target DC-DC converter includes: a DC-DC converter connected between the photovoltaic unit and the energy storage unit, and / or a DC-DC converter connected between the energy storage unit and the electrolyzer unit. The device includes: The acquisition module is used to acquire the real-time temperature of the electrolyte in the electrolytic cell unit; The working mode determination module is used to determine the target working mode corresponding to the target temperature range based on the target temperature range where the real-time temperature of the electrolyte is located. The control module is used to control the target DC-DC converter to operate based on the target operating mode; The target temperature range is any one of multiple temperature ranges, and the heat generated by the switching losses of the target DC-DC converter varies under different operating modes corresponding to different temperature ranges.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 8.

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