Partitioned bipolar plate, battery, electric pile and multi-zone temperature cascade regulation and control system

Abstract

The invention belongs to the field of fuel cell regulation and control, and particularly discloses a partitioned bipolar plate, a cell, an electric pile and a multi-region temperature cascade regulation and control system. Through step-by-step heat exchange from top to bottom in the gas flowing direction, controllable progressive increase of the temperature of the water-cooling flow channel is formed, a corresponding temperature step regulation and control strategy is provided, and heat regeneration and step temperature control technologies are combined, so that the complexity and energy loss during engineering implementation are greatly reduced, and the engineering implementation efficiency is improved. And the overall operation performance is improved while the local performance balance of the battery is optimized. The system is not only suitable for a single battery, but also suitable for the whole galvanic pile. Powerful support is provided for efficient and stable operation of a vehicle-mounted fuel cell system, and particularly, the excellent performance improvement capability is shown under a cross-humidity environment and a high-load condition.

Description

Technical Field

[0001] This application belongs to the field of fuel cell regulation. More specifically, it relates to a partitioned bipolar plate, a battery, a fuel cell stack, and a multi-region temperature cascade regulation system. Background Art

[0002] With the continuous increase in the automotive industry's demand for efficient and environmentally friendly power systems, fuel cells, especially proton exchange membrane fuel cells, have been widely used in hydrogen fuel cell vehicles due to their advantages such as high efficiency and zero emissions. However, in actual on-vehicle applications, proton exchange membrane fuel cells often face serious problems of uneven local performance under high current density operation. Specifically, the upstream region is prone to a decrease in power generation capacity due to membrane dehydration, and the downstream region is prone to flooding due to excessive product water generated by the reaction, which in turn affects the overall stability and performance of the system.

[0003] In recent years, some studies have demonstrated at the single-cell level that by implementing a lower temperature in the upstream region and a higher temperature in the downstream region, the high current density performance under high power operation conditions can be improved to a certain extent, thereby alleviating the problems of upstream drying and downstream flooding.

[0004] However, the existing technologies have the following deficiencies: (1) Existing research mainly focuses on the design of a single cell, and no systematic structural design and optimization have been carried out on the entire fuel cell stack; (2) In existing research, the upstream and downstream temperature control often relies on three separate water tanks, pumps, and heaters for independent control. This design is not only difficult to promote in actual engineering, but also has high system complexity and large energy consumption, making it difficult to meet the requirements of on-vehicle systems for compactness and high efficiency. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the purpose of this application is to provide a partitioned bipolar plate, a battery, a fuel cell stack, and a multi-region temperature cascade regulation system, aiming to solve the problems of upstream drying and downstream flooding that often occur in fuel cells during high current density operation.

[0006] The first aspect of this application relates to a partitioned bipolar plate, which includes a plate body, a plurality of coolant inlets, a plurality of coolant outlets, and a plurality of coolant flow regions; along the gas flow direction, a plurality of mutually independent coolant flow regions are uniformly arranged inside the plate body; perpendicular to the gas flow direction, a coolant inlet and a coolant outlet are symmetrically arranged on both sides of each coolant flow region and are connected to the inlet and outlet; the outlet of the previous flow region is connected to the inlet of the next flow region.

[0007] Preferably, the number of the coolant flow regions is not less than 3.

[0008] A second aspect of the present application relates to a battery, comprising a membrane electrode and the partitioned bipolar plates described in the first aspect, wherein the partitioned bipolar plates are located on both sides of the membrane electrode.

[0009] The third aspect of the present application relates to a battery stack, which is formed by stacking multiple single cells as described in the second aspect, wherein the partitioned bipolar plates are used to provide transmission channels for the reaction gas, separate adjacent membrane electrodes, and realize current conduction between each single cell.

[0010] The fourth aspect of the present application relates to a multi-zone temperature step control system, which is used for the battery as described in the second aspect or the battery stack as described in the third aspect, and includes: a liquid cooling module, a temperature adjustment module, a temperature monitoring module, a control module and a heat recovery module; the liquid cooling module is used to remove the waste heat generated by the operation of the battery / battery stack through the coolant; the temperature adjustment module includes: a plurality of auxiliary heat exchange units, which are respectively located at the entrance of each coolant flow area of ​​the battery / battery stack, and are used to work in the corresponding working mode according to the control instruction to heat / cool / not treat the coolant; the temperature monitoring module is used to monitor the temperature at the outlet of each coolant flow area of ​​the battery in real time; the control module controls the working mode of each auxiliary heat exchange unit based on the monitoring results to ensure that the coolant about to enter each cooling area reaches a preset temperature range, and the preset temperature of the coolant increases from area to area along the flow direction of the reaction gas; the heat recovery module is used to recover the waste heat generated during the flow of the coolant, and the recovered heat is used to increase the coolant temperature of the designated area through the heat exchange process.

[0011] Preferably, the liquid cooling module comprises: a pump, a water tank and a cooling channel of a battery / battery stack, wherein the water tank is used to store coolant; the pump is used to drive the coolant in the water tank to flow in the water cooling channel; the cooling channel of the battery / battery stack is used to introduce the coolant into the corresponding area of ​​the battery stack for heat exchange.

[0012] Preferably, the auxiliary heat exchange unit comprises three parallel branches; the first branch is composed of a valve and a cooler in series; the second branch is composed of a valve; and the third branch is composed of a valve and a heater in series.

[0013] Preferably, the control module includes: at least one memory for storing programs; and at least one processor for entering the programs stored in the memory. When the programs stored in the memory are entered, the processor is used to enter the control method described below: When the measured temperature of the temperature sensor n is within the set temperature range, the auxiliary heat exchange unit n is in the sleep mode, that is, the valve in the third branch is closed, the heater is closed, the valve in the second branch is open, the valve in the first branch is closed, and the cooler is closed; when the measured temperature of the temperature sensor n is higher than the set temperature range, the auxiliary heat exchange unit n is in the heat dissipation mode, that is, the valve in the third branch is closed, the heater is closed, the valve in the second branch is closed, the valve in the first branch is opened, and the cooler is opened; when the measured temperature of the temperature sensor n is lower than the set temperature range, the auxiliary heat exchange unit n is in the heating mode, that is, the valve in the third branch is opened, the heater is opened, the valve in the second branch is closed, the valve in the first branch is closed, and the cooler is closed.

[0014] Preferably, when the temperature adjustment module includes three auxiliary heat exchange units, the first auxiliary heat exchange unit is close to the gas inlet reaction zone, and the third auxiliary heat exchange unit is close to the gas outlet reaction zone. The heat recovery module includes: a first heat exchanger, a second heat exchanger, a diverter, and a confluence device; The first heat exchanger is used to perform heat exchange on the coolant flowing out of the first cooling channel and the diverted coolant, and then transfer it to the second auxiliary heat exchange unit and the confluence device; the second heat exchanger is used to perform heat exchange on the coolant flowing out of the second cooling channel and the diverted coolant, and then transfer it to the third auxiliary heat exchange unit and the confluence device; the diverter is used to divide the coolant flowing out of the third cooling channel into two paths and transfer them to the first heat exchanger and the second heat exchanger respectively; the confluence device is used to mix the coolant flowing out of the first heat exchanger and the second heat exchanger and transfer it to the pump.

[0015] Generally speaking, compared with the prior art, the above technical solution conceived by the present application has the following beneficial effects: (1) The present application proposes a partitioned bipolar plate. By reconstructing the partition of the continuous cooling channels, the water-cooling channels are divided into multiple independent regions along the gas flow direction. The outlet of the previous flow region is connected to the inlet of the subsequent flow region. Each flow region is later combined with an efficient regenerative device and a temperature gradient control strategy to achieve the control of the temperature of each coolant increasing step by step along the reaction gas flow direction. This structure not only optimizes the local temperature distribution, effectively alleviates the problem of coexistence of drying and flooding, but also greatly reduces energy consumption while improving the cooling efficiency, thus providing a feasible technical path for the efficient and stable operation of the fuel cell system under actual working conditions.

[0016] (2) This application proposes a system for realizing multi-region temperature cascade control of fuel cells. By exchanging heat step by step from top to bottom along the gas flow direction, a controllable increasing temperature of the water-cooled flow channel is formed, and corresponding temperature cascade control strategies are equipped, combined with regenerative heat and cascade temperature control technologies, thereby greatly reducing the complexity and energy loss during engineering implementation, and improving the overall operating performance while optimizing the local performance balance of the battery. This system is applicable not only to a single cell but also to the entire stack, providing strong support for the efficient and stable operation of on-vehicle fuel cell systems, especially showing excellent performance improvement capabilities in cross-humidity environments and high-load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a partitioned bipolar plate structure provided by an embodiment of this application.

[0018] Figure 2 It is a schematic diagram of a multi-region temperature cascade control system structure provided by an embodiment of this application.

[0019] Figure 3 It is a schematic diagram of the flow chart of the control method provided by an embodiment of this application.

[0020] In all the drawings, the same reference numerals are used to represent the same elements or structures, where: 1 is the first coolant inlet, 2 is the first coolant flow region, 3 is the first coolant outlet, 4 is the second coolant inlet, 5 is the second coolant flow region, 6 is the second coolant outlet, 7 is the third coolant inlet, 8 is the third coolant flow region, 9 is the third coolant outlet, 10 is the first reaction gas inlet, 11 is the second reaction gas inlet, 12 is the second reaction gas outlet, and 13 is the first reaction gas outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions, and advantages of this application clearer, the following further details this application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0022] The term "and / or" in this application is an association relationship describing associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The symbol " / " in this application represents an "or" relationship between associated objects. For example, A / B represents A or B.

[0023] In the description of the specification and claims of this application, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order of the objects. For example, a first response message and a second response message are used to distinguish different response messages, rather than to describe a specific order of the response messages.

[0024] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0025] In the description of the embodiments of this application, unless otherwise specified, the meaning of "a plurality" refers to two or more. For example, a plurality of processing units refers to two or more processing units, etc.; a plurality of elements refers to two or more elements, etc.

[0026] The embodiments of this application will be described below with reference to the accompanying drawings in the embodiments of this application.

[0027] The water-cooling structure of a traditional bipolar plate usually adopts an integrated continuous cooling channel that runs through the entire battery. The coolant flows along a preset single path, and the cooling effect mainly depends on the adjustment of the overall flow rate. It is difficult to achieve precise temperature zoning control for local areas such as the upstream and downstream, which further limits the water-heat management and local performance balance optimization under high-performance operation. Although this integrated cooling structure has certain advantages in simplifying system design, it is difficult to effectively cope with the problems of drying in the upstream area and flooding in the downstream area under working conditions such as high power output and low humidity commonly seen in practical applications, which is likely to cause local power generation performance imbalance and affect the overall efficiency and stability of the system.

[0028] To address this problem, a first aspect of this application relates to a partitioned bipolar plate, which includes a plate body, a plurality of coolant inlets, a plurality of coolant outlets, and a plurality of coolant flow regions; along the gas flow direction, a plurality of mutually independent coolant flow regions are uniformly arranged inside the plate body; perpendicular to the gas flow direction, a coolant inlet and a coolant outlet are symmetrically arranged on both sides of each coolant flow region and are connected to the inlet and the outlet; the outlet of the previous flow region is connected to the inlet of the next flow region.

[0029] Preferably, the number of the coolant flow regions is not less than 3.

[0030] A second aspect of this application relates to a battery, which includes a membrane electrode and the partitioned bipolar plate described in the first aspect, and the partitioned bipolar plate is located on both sides of the membrane electrode.

[0031] The third aspect of the present application relates to a stack of cells, which is formed by stacking a plurality of single cells as described in the second aspect. The partitioned bipolar plate is used to provide a transmission channel for the reaction gas, separate adjacent membrane electrode assemblies, and achieve current conduction between the single cells.

[0032] The fourth aspect of the present application relates to a multi-region temperature cascade control system, which is used for the battery as described in the second aspect or the stack of cells as described in the third aspect, and includes: a liquid cooling module, a temperature regulation module, a temperature monitoring module, a control module, and a heat recovery module; the liquid cooling module is used to take away the waste heat generated during the operation of the battery / stack of cells through a coolant; the temperature regulation module includes: a plurality of auxiliary heat exchange units, which are respectively located at the inlets of the coolant flow regions of the battery / stack of cells, and are used to work in corresponding working modes according to control instructions to heat / cool / do not process the coolant; the temperature monitoring module is used to monitor the temperature at the outlets of the coolant flow regions of the battery in real time; the control module controls the working modes of the auxiliary heat exchange units based on the monitoring results to ensure that the coolant about to enter each cooling region reaches a preset temperature range, and the preset temperature of the coolant increases gradually along the reaction gas flow direction; the heat recovery module is used to recover the waste heat generated during the flow of the coolant, and use the recovered heat to increase the temperature of the coolant in a specified region through a heat exchange process.

[0033] Preferably, the liquid cooling module includes: a pump, a water tank, and a cooling channel of the battery / stack of cells. Among them, the water tank is used to store the coolant; the pump is used to drive the coolant in the water tank to flow in the water cooling channel; the cooling channel of the battery / stack of cells is used to introduce the coolant into the corresponding region of the stack of cells for heat exchange.

[0034] Preferably, the auxiliary heat exchange unit includes three parallel branches; the first branch is composed of a valve and a cooler connected in series; the second branch is composed of a valve; the third branch is composed of a valve and a heater connected in series.

[0035] Preferably, the control module includes: at least one memory for storing a program; at least one processor for accessing the program stored in the memory. When the program stored in the memory is accessed, the processor is used to execute the regulation method described below: When the measured temperature of the temperature sensor n is within the set temperature range, the auxiliary heat exchange unit n is in the sleep mode, that is, the valve in the third branch is closed, the heater is turned off, the valve in the second branch is opened, the valve in the first branch is closed, and the cooler is turned off; when the measured temperature of the temperature sensor n is higher than the set temperature range, the auxiliary heat exchange unit n is in the heat dissipation mode, that is, the valve in the third branch is closed, the heater is turned off, the valve in the second branch is closed, the valve in the first branch is opened, and the cooler is turned on; when the measured temperature of the temperature sensor n is lower than the set temperature range, the auxiliary heat exchange unit n is in the heating mode, that is, the valve in the third branch is opened, the heater is turned on, the valve in the second branch is closed, the valve in the first branch is closed, and the cooler is turned off.

[0036] It should be noted that the above control method can effectively alleviate the problems of upstream drying and downstream flooding, optimize the local current density distribution, and significantly improve the performance of the fuel cell under high current density and dynamic load conditions by adjusting the temperature of each area, thereby changing the saturated vapor pressure and relative humidity in the reaction area.

[0037] Preferably, when the temperature adjustment module includes three auxiliary heat exchange units, the first auxiliary heat exchange unit is close to the reaction area of the gas inlet, and the third auxiliary heat exchange unit is close to the reaction area of the gas outlet. The heat recovery module includes: a first heat exchanger, a second heat exchanger, a shunt and a confluence. The first heat exchanger is used to exchange heat between the coolant flowing out of the first cooling channel and the shunted coolant, and then transfer it to the second auxiliary heat exchange unit and the confluence; the second heat exchanger is used to exchange heat between the coolant flowing out of the second cooling channel and the shunted coolant, and then transfer it to the third auxiliary heat exchange unit and the confluence; the shunt is used to divide the coolant flowing out of the third cooling channel into two paths and transfer them to the first heat exchanger and the second heat exchanger respectively; the confluence is used to mix the coolant flowing out of the first heat exchanger and the second heat exchanger and transfer it to the pump.

[0038] Embodiment As Figure 1As shown in the figure, this embodiment provides a partitioned bipolar plate, which mainly includes a plate body, reaction gas inlets / outlets (10, 11, 12, 13), coolant inlets / outlets (1, 3, 4, 6, 7, 9), and coolant flow regions (2, 5, 8). Among them, the coolant flow region is divided into 3 regions to achieve multi-region temperature cascade control. Specifically, the first coolant inlet 1 and the first coolant outlet 3 are respectively connected to the first coolant flow region 2; the second coolant inlet 4 and the second coolant outlet 6 are respectively connected to the second coolant flow region 5; the third coolant inlet 7 and the third coolant outlet 9 are respectively connected to the third coolant flow region 8. Each group of coolant flow regions 2, 5, 8 is independent of each other. The above structure is not only applicable to a three-region design, but can also be expanded to any number of cooling regions according to design requirements to achieve a more refined multi-region temperature control layout.

[0039] The first reaction gas inlet 10 and the first reaction gas outlet 13 are used for the inlet and outlet of the first reaction gas (hydrogen or air). The reaction gas flows in the direction indicated by the dotted arrow, and provides the reaction gas to the membrane electrode reaction region on one side of the bipolar plate. The second reaction gas inlet 11 and the second reaction gas outlet 12 are used for the inlet and outlet of the second reaction gas (air or hydrogen). The reaction gas flows in the direction indicated by the solid arrow, and provides the reaction gas to the membrane electrode reaction region on the other side of the bipolar plate.

[0040] The coolant flows in from the first coolant inlet 1 and flows through each flow region in turn to the third coolant outlet 9. Specifically, the coolant passes through the cooling regions 2, 5, 8 in the order of 1→3→4→6→7→9. At the inlet and outlet of each cooling region, a heat regeneration or auxiliary temperature control device is provided to ensure that the temperature of the cooling region remains at the preset target temperature. The inlets and outlets of the coolant are docked with their respective corresponding cooling regions in position to ensure effective temperature control within their respective regions.

[0041] The complete gas path flow process when the bipolar plate works is as follows: The first reaction gas enters from the inlet 10, flows in the direction indicated by the dotted arrow of the bipolar plate, passes through the membrane electrode reaction region, and is discharged from the outlet 13. The second reaction gas enters from the inlet 11, flows in the direction indicated by the solid arrow of the bipolar plate, provides the required gas in the membrane electrode reaction region, and is finally discharged from the outlet 12.

[0042] As Figure 2 shown, this embodiment provides a multi-region temperature cascade control system, including: a liquid cooling module, a temperature regulation module, a temperature monitoring and control module, and a heat recovery module.

[0043] The liquid cooling module includes: a pump, a water tank, and a cooling channel of the fuel cell stack. The pump is used to drive the coolant in the water tank to flow in the water cooling channel. The water tank stores the coolant and introduces the liquid into the corresponding area of the fuel cell stack through the cooling channel for heat exchange. Through the auxiliary heat exchange unit and the heat recovery module, the coolant exchanges heat with the waste heat generated by the fuel cell stack when flowing through each area, and finally the temperature of the corresponding area of the fuel cell stack reaches the designed temperature.

[0044] The temperature regulation module includes: an auxiliary heat exchange unit (1, 2, 3), which is composed of valves, heaters, and coolers. The auxiliary heat exchange unit is located at the inlet of each designed cooling area of the fuel cell stack. By adjusting the opening and closing of the valves, coolers, and heaters, and working together with the heat recovery module, it ensures the temperature stability of the corresponding area of the fuel cell stack and reaches the preset designed temperature.

[0045] The temperature monitoring and control module includes: temperature sensors 1, 2, and 3, which are respectively located at the outlets of each designed cooling area of the fuel cell stack. The controller is connected to each temperature sensor, valve, cooler, and heater. By monitoring the temperature in real time and combining with the control strategy, the controller adjusts the working mode of the auxiliary heat exchange unit to ensure the temperature stability of each area of the fuel cell stack and reaches the preset designed temperature.

[0046] The heat recovery module uses the recovered heat to increase the temperature of the coolant in the specified area through the heat exchange process, reduces energy consumption, and improves the overall energy efficiency of the system. This module includes: heat exchanger a, heat exchanger b, a diverter, and a confluence device. Heat exchanger a and heat exchanger b are respectively located before the auxiliary heat exchange units 2 and 3, and work together to ensure the temperature stability of the corresponding area of the fuel cell stack. Through the energy recovery mechanism, energy waste is minimized while ensuring that each area reaches the preset designed temperature. The diverter diverts the coolant with a relatively high temperature designed for the reaction area near the outlet (3 paths) to heat exchanger a and heat exchanger b, which is used to heat the coolant that has just come out of path 1 and is about to enter path 2, and the coolant that has just come out of path 2 and is about to enter path 3.

[0047] The water cooling channels in the fuel cell stack are sequentially divided into path 1, path 2, and path 3 (more paths can be set according to needs in actual design) along the flow direction of the gas (hydrogen and air / oxygen) from the inlet to the outlet, and each path is independent of each other in the battery structure. The water flow only flows from path 1 to path 2, and then to path 3 in the order shown in the figure.

[0048] Path 1, path 2, and path 3 respectively represent the water cooling areas divided along the gas flow direction, and their set temperatures are T1, T2, and T3 respectively. In view of the fact that in actual operation, the reaction area near the reaction gas inlet (path 1) is prone to drying, while the reaction area near the outlet (path 3) is prone to flooding due to excessive water generation, the principle of T1 < T2 < T3 is followed in the design, based on the principle that the higher the temperature, the higher the saturated vapor pressure and the lower the relative humidity.

[0049] To ensure that the temperature in the water-cooled channels reaches the preset values in sequence along Route 1, Route 2, and Route 3, the following scheme is adopted to achieve progressive temperature control: First, the coolant in the water tank is pumped into Auxiliary Heat Exchange Unit 1. After reaching the set temperature T1, it passes through the cooling flow channel of Route 1 to make the battery temperature in this area reach the set temperature T1. Then, it passes through Heat Exchanger a (exchanging heat with the cooling water with a temperature of T3 diverted from Route 3, where T3>T1) and Auxiliary Heat Exchange Unit 2, reaches the set temperature T2, passes through the second cooling flow channel to make the battery temperature in this area reach the set temperature T2. Subsequently, it passes through Heat Exchanger b (exchanging heat with a part of the cooling water with a temperature of T3 flowing out of Route 3, where T3>T2) and Auxiliary Heat Exchange Unit 3, reaches the set temperature T3, and passes through the third cooling flow channel to make the battery temperature in this area reach the set temperature T3. The coolant flowing out of the third cooling flow channel is divided into two paths by a diverter, and respectively passes through Heat Exchangers a and b to exchange heat with the coolant at the outlet of Route 1 (which is about to enter Auxiliary Heat Exchange Unit 2 and serve as the inlet of Route 2, with a target temperature of T2) and the outlet of Route 2 (which is about to enter Auxiliary Heat Exchange Unit 3 and serve as the inlet of Route 3, with a target temperature of T3), realizing heat recovery and minimizing energy consumption to the greatest extent.

[0050] The design of the auxiliary heat exchange unit system (Auxiliary Heat Exchange Units 1, 2, 3) is aimed at ensuring that the coolant about to enter each cooling area reaches the preset temperature range, and its control method is as Figure 3 shown. Temperature sensors 1, 2, and 3 respectively monitor the temperatures at the outlets of the cooling water in Route 1, Route 2, and Route 3 in real time and feed the data back to the controller. The controller judges whether the temperatures in each cooling area are maintained within the preset T1, T2, and T3 ranges based on these monitored values; at the same time, to ensure the stability of system control, the allowable fluctuation range (∆T) of the set temperature is regarded as the tolerance interval of the normal control state. When the measured temperature is within the set temperature range, Auxiliary Heat Exchange Unit n (n = 1, 2, 3) is in the sleep mode, that is, Valve n - 1 is closed, Valve n - 2 is open, Valve n - 3 is closed, Heater n is closed, and Cooler n is closed; when the measured temperature is higher than the set temperature range, Auxiliary Heat Exchange Unit n (n = 1, 2, 3) is in the heat dissipation mode, that is, Valve n - 1 is closed, Valve n - 2 is closed, Valve n - 3 is opened, Heater n is closed, and Cooler n is opened; when the measured temperature is lower than the set temperature range, Auxiliary Heat Exchange Unit n (n = 1, 2, 3) is in the heating mode, that is, Valve n - 1 is opened, Valve n - 2 is closed, Valve n - 3 is closed, Heater n is opened, and Cooler n is closed.

[0051] It should be understood that the above device is used to execute the method in the above embodiment. For the corresponding program modules in the device, their implementation principles and technical effects are similar to the descriptions in the above method. The working process of this device can refer to the corresponding process in the above method and will not be elaborated here.

[0052] In addition, when the logical instructions in the above-mentioned memory are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application.

[0053] Based on the method in the above embodiment, an embodiment of the present application provides a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program runs on a processor, the processor is caused to execute the method in the above embodiment.

[0054] Based on the method in the above embodiment, an embodiment of the present application provides a computer program product. When the computer program product runs on a processor, the processor is caused to execute the method in the above embodiment.

[0055] It can be understood that the processor in the embodiments of the present application may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. The general-purpose processor may be a microprocessor or any conventional processor.

[0056] The method steps in the embodiments of the present application can be implemented in a hardware manner or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory (RAM), flash memory, read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), registers, hard disks, removable hard disks, CD-ROMs, or any other form of storage medium well-known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC.

[0057] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0058] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0059] Those skilled in the art can easily understand that the above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A partitioned bipolar plate, characterized in that, It includes a plate body, a plurality of coolant inlets, a plurality of coolant outlets and a plurality of coolant flow regions; In the gas flow direction, a plurality of mutually independent coolant flow regions are uniformly arranged inside the plate body; In the direction perpendicular to the gas flow direction, a coolant inlet and a coolant outlet are symmetrically arranged on both sides of each coolant flow region and are communicated with the inlet and the outlet; The outlet of the previous flow region is communicated with the inlet of the next flow region.

2. The partitioned bipolar plate according to claim 1, wherein The number of the coolant flow regions is not less than 3.

3. A battery, characterized in that, It includes a membrane electrode and a partitioned bipolar plate as described in claim 1 or 2, and the partitioned bipolar plate is located on both sides of the membrane electrode.

4. A stack, characterized in that, It is stacked by a plurality of batteries as described in claim 3, wherein the partitioned bipolar plate is used to provide a transmission channel for reaction gases, separate adjacent membrane electrodes, and realize current conduction between single cells.

5. A multi-region temperature cascade control system, characterized in that, This system is used for the battery as described in claim 3 or the stack as described in claim 4, and includes: a liquid cooling module, a temperature regulation module, a temperature monitoring module, a control module and a heat recovery module; The liquid cooling module is used to take away the waste heat generated during the operation of the battery / stack through coolant; The temperature regulation module includes: a plurality of auxiliary heat exchange units, which are respectively located at the inlets of the coolant flow regions of the battery / stack, and are used to work in corresponding working modes according to control instructions to heat / cool / do not process the coolant; The temperature monitoring module is used to monitor the temperature at the outlets of the coolant flow regions of the battery in real time; The control module controls the working modes of the auxiliary heat exchange units based on the monitoring results to ensure that the coolant about to enter each cooling region reaches a preset temperature range, and the preset temperature of the coolant increases gradually along the reaction gas flow direction; The heat recovery module is used to recover the waste heat generated during the flow of the coolant, and use the recovered heat to increase the temperature of the coolant in a specified region through a heat exchange process.

6. The system according to claim 5, wherein The liquid cooling module includes: a pump, a water tank and a cooling channel of the battery / stack. Among them, the water tank is used to store coolant; the pump is used to drive the coolant in the water tank to flow in the water cooling channel; the cooling channel of the battery / stack is used to introduce the coolant into the corresponding region of the stack for heat exchange.

7. The system according to claim 5, characterized in that The auxiliary heat exchange unit includes three parallel branches; the first branch is composed of a valve and a cooler in series; the second branch is composed of a valve; the third branch is composed of a valve and a heater in series.

8. The system according to claim 7, wherein The control module includes: At least one memory for storing programs; At least one processor for entering the program stored in the memory. When the program stored in the memory is entered, the processor is used to enter the regulation method described below: When the measured temperature of the temperature sensor n is within the set temperature range, the auxiliary heat exchange unit n is in the sleep mode, that is, the valve in the third branch is closed, the heater is closed, the valve in the second branch is opened, the valve in the first branch is closed, and the cooler is closed; When the measured temperature of the temperature sensor n is higher than the set temperature range, the auxiliary heat exchange unit n is in the heat dissipation mode, that is, the valve in the third branch is closed, the heater is closed, the valve in the second branch is closed, the valve in the first branch is opened, and the cooler is opened; When the measured temperature of the temperature sensor n is lower than the set temperature range, the auxiliary heat exchange unit n is in the heating mode, that is, the valve in the third branch is opened, the heater is turned on, the valve in the second branch is closed, the valve in the first branch is closed, and the cooler is turned off.

9. The system according to claim 5, wherein When the temperature regulation module includes three auxiliary heat exchange units, the first auxiliary heat exchange unit is close to the gas inlet reaction zone, and the third auxiliary heat exchange unit is close to the gas outlet reaction zone. The heat recovery module includes: a first heat exchanger, a second heat exchanger, a diverter, and a confluence device; The first heat exchanger is used to exchange heat between the coolant flowing out of the first cooling channel and the diverted coolant, and then transfer it to the second auxiliary heat exchange unit and the confluence device; The second heat exchanger is used to exchange heat between the coolant flowing out of the second cooling channel and the diverted coolant, and then transfer it to the third auxiliary heat exchange unit and the confluence device; The diverter is used to divide the coolant flowing out of the third cooling channel into two paths and transfer them to the first heat exchanger and the second heat exchanger respectively; The confluence device is used to mix the coolant flowing out of the first heat exchanger and the second heat exchanger and transfer it to the pump.

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