Energy storage device with hybrid structure of hydrogen ion battery and lithium ion battery

Abstract

The utility model discloses a hydrogen ion battery and lithium ion battery mixed structure energy storage device, which comprises a shell, a lithium ion battery, a hydrogen ion battery, a lithium ion battery, a lithium ion battery, a lithium ion battery, a hydrogen ion battery and a lithium ion battery, the partition plate is arranged in the shell and divides the interior of the shell into two parts; the battery pack is arranged in the shell, the battery pack comprises a plurality of hydrogen ion battery monomers and a plurality of lithium ion battery monomers, and the hydrogen ion battery monomers and the lithium ion battery monomers are arranged at intervals. According to the technical scheme, the advantages of the hydrogen ion battery and the lithium ion battery are combined, performance optimization of the energy storage device is achieved, and the energy storage device has the advantages of being low in cost, convenient to operate and manage, high in safety and reliability and the like; by arranging the cooling circulation structure, the charging and discharging efficiency of the battery can be improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an energy storage device with a hybrid structure of hydrogen-ion battery and lithium-ion battery. Background Technology

[0002] With the rapid development of the new energy industry and the widespread application of unstable renewable energy sources such as solar and wind power, energy storage technology has become crucial for ensuring a stable energy supply and efficient utilization. Common energy storage technologies currently include lithium-ion battery energy storage, sodium-ion battery energy storage, and supercapacitor energy storage. Lithium-ion batteries have advantages such as high energy density and long cycle life, and are widely used in the energy storage field, but their cost is relatively high; supercapacitors have high power density and fast charging and discharging speeds, but their energy density is relatively low.

[0003] Existing energy storage technologies, when used alone, struggle to simultaneously meet the requirements of high energy density, high power density, long cycle life, and low cost. In applications requiring both high energy density for long-term energy storage and high power density for rapid charging and discharging, such as peak shaving and frequency regulation in smart grids and rapid start-stop systems for electric vehicles, a single energy storage technology cannot achieve the desired performance. Utility Model Content

[0004] To overcome the shortcomings of existing energy storage technologies, this invention proposes a hybrid energy storage device combining hydrogen-ion and lithium-ion batteries. By combining the advantages of the two types of batteries, it aims to meet the diverse needs of different application scenarios for energy storage systems.

[0005] This utility model is achieved through the following technical solution:

[0006] A hybrid energy storage device combining hydrogen-ion and lithium-ion batteries, comprising:

[0007] The housing has an internal mounting cavity, and a cover plate is provided on the top of the housing, with a drain valve provided on the cover plate;

[0008] A partition is installed inside the housing and divides the interior of the housing into two parts;

[0009] A battery pack is disposed inside a housing. The battery pack includes multiple hydrogen-ion battery cells and multiple lithium-ion battery cells, which are arranged at intervals.

[0010] A further feature of this technical solution is that the housing has a first sidewall and a second sidewall disposed opposite to each other, and both the first sidewall and the second sidewall are perpendicular to the partition.

[0011] The first side wall is provided with a cooling water inlet and a cooling water outlet, which are located on both sides of the partition.

[0012] Two outlets are provided on the second side wall, located on both sides of the partition, and connected to each other by a connecting conduit.

[0013] Deionized water can be introduced into the shell through a cooling water inlet.

[0014] A further provision of this technical solution is that both the hydrogen-ion battery cell and the lithium-ion battery cell are mounted in the mounting cavity inside the housing via a bracket, the bracket comprising:

[0015] The support body is hollow inside, and at least one side wall of the support body is provided with heat dissipation holes;

[0016] Spacer blocks: L-shaped spacer blocks are provided at the four corners of the lower end of the main body of the support.

[0017] The positioning plate is located at the top of the main body of the bracket. The center of the positioning plate is hollowed out, and there are protrusions at the four corners of the positioning plate.

[0018] A further provision of this technical solution is that both the hydrogen-ion battery cell and the lithium-ion battery cell include a battery body, a positive electrode disposed on the upper end of the battery body, a negative electrode disposed on the upper end of the battery body, and a vent hole disposed on the upper end of the battery body.

[0019] A further provision of this technical solution is that the upper end of the battery pack is provided with a sealing plate, and the surface of the sealing plate is uniformly provided with a plurality of lead-out holes, and the electrodes of the hydrogen-ion battery cells and the lithium-ion battery cells are located in the lead-out holes.

[0020] A further provision of this technical solution is that a handle is provided on the outside of the housing.

[0021] This utility model discloses a hybrid energy storage device combining hydrogen-ion and lithium-ion batteries, which, compared with existing technologies:

[0022] This technical solution combines the advantages of both hydrogen-ion and lithium-ion batteries to optimize the performance of the energy storage device. It offers advantages such as low cost, ease of operation and management, and high safety and reliability. By setting up a cooling circulation structure, the charging and discharging efficiency of the battery can be improved. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the internal structure of the present invention. Figure 1 .

[0025] Figure 3 This is a schematic diagram of the internal structure of the present invention. Figure 2 .

[0026] Figure 4 This is a schematic diagram of the structure of the bracket of this utility model.

[0027] Figure 5 This is a schematic diagram of the battery arrangement of this utility model.

[0028] The numbers and letters in the diagram represent the names of the corresponding components:

[0029] The components are: 1. Shell; 2. Drain valve; 3. Separator; 4. Hydrogen-ion battery cell; 5. Lithium-ion battery cell; 6. Cooling water inlet; 7. Cooling water outlet; 8. Bracket; 9. Sealing plate; 10. Outlet hole; 11. Handle; 12. Connecting conduit; 81. Bracket body; 82. Heat dissipation hole; 83. Spacer block; 84. Positioning plate; 85. Protrusion. Detailed Implementation

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0032] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] See Figures 1 to 5As shown, a hybrid energy storage device combining hydrogen-ion and lithium-ion batteries includes: a housing 1 with an internal mounting cavity, a cover plate on the top of the housing 1, and a drain valve 2 at the cover plate; a separator 3 disposed inside the housing 1, dividing the interior of the housing 1 into two parts; and a battery pack disposed inside the housing 1, comprising multiple hydrogen-ion battery cells 4 and multiple lithium-ion battery cells 5, the hydrogen-ion battery cells 4 and the lithium-ion battery cells 5 being arranged at intervals. In this technical solution, the structure of the hydrogen-ion battery cell 4 is as follows: the hydrogen-ion battery mainly includes a positive electrode, a negative electrode, a separator, and an electrolyte with sodium carbonate or sodium bicarbonate as the main component. The positive electrode uses basic carbonate or bicarbonate containing manganese or nickel, which can effectively store and release hydrogen ions during charging and discharging. The negative electrode uses basic carbonate or bicarbonate containing iron or magnesium. This material has a high theoretical specific capacity and a low potential, which is beneficial to improving the energy density and charging and discharging efficiency of the battery. The separator uses an ion exchange membrane, which has good ion permeability and mechanical strength, effectively blocking the positive and negative electrodes to prevent short circuits, while allowing hydrogen ions to pass through. The electrolyte composition is primarily sodium carbonate (Na₂CO₃) or sodium bicarbonate (NaHCO₃). The lithium-ion battery cell structure mainly includes a positive electrode, a negative electrode, a separator, and an electrolyte primarily composed of sodium carbonate or sodium bicarbonate. The positive electrode uses lithium iron phosphate, which can effectively store and release lithium ions during charging and discharging. The negative electrode uses graphite, a material with high theoretical specific capacity and low potential, which is beneficial for improving the battery's energy density and charge / discharge efficiency. The separator uses an inorganic composite material. The membrane has good ion permeability and mechanical strength, effectively blocking the positive and negative electrodes to prevent short circuits, while allowing lithium ions to pass through. The electrolyte composition is as follows: the electrolyte is mainly composed of lithium hexafluorophosphate, and the solvent is a carbonate-based organic solvent. The energy storage device of this technical solution uses multiple spaced hydrogen-ion battery cells and lithium-ion battery cells. The charging and discharging of the hydrogen-ion battery module and the lithium-ion battery module can be coordinated and controlled according to different application scenarios (such as grid peak shaving, electric vehicle start-stop, etc.) and real-time load requirements. When high power output is required, the hydrogen-ion battery discharge is prioritized; when a long-term stable energy supply is required, the lithium-ion battery discharge is the main source of power. Meanwhile, during the charging process, the charging power is reasonably allocated according to the state of the two types of batteries to achieve efficient charging. At the same time, since gas is produced inside the hydrogen ion battery cell 4 and the lithium ion battery cell 5 during use, the internal gas pressure of the casing 1 will increase. The gas pressure inside the energy storage device can be balanced by the setting of the vent valve 2. When the internal pressure is greater than the set threshold, the vent valve opens to release the excess gas pressure, thereby maintaining internal balance. The casing 1 is preferably a rectangular structure, and the mounting cavity is preferably a rectangular cavity.

[0034] See Figures 1 to 5As shown, the housing 1 has a first sidewall and a second sidewall arranged opposite to each other, both of which are perpendicular to the partition 3. A cooling water inlet 6 and a cooling water outlet 7 are provided on the first sidewall, located on opposite sides of the partition 3. Two outlets are provided on the second sidewall, located on opposite sides of the partition 3, and connected by a connecting conduit 12. Deionized water can be introduced into the housing 1 through the cooling water inlet 6. In this technical solution, a cooling pool is also provided outside the energy storage device, containing deionized water. The deionized water in the cooling pool enters the housing 1 through the cooling water inlet 6 via a water pump. Since the connecting conduit 12 is located on the second sidewall, the two cavities separated by the partition 3 are connected by the connecting conduit 12. Deionized water enters through the cooling water inlet 6 and then exits through the connecting conduit 12 and the cooling water outlet 7. The deionized water is discharged into the cooling pool through a conduit. Notably, the height of the deionized water inside the casing 1 is lower than the height of the individual battery cells. Through the circulating deionized water, heat exchange can occur between the circulating water and the outer shell of the battery cells, thereby improving the charging and discharging efficiency of the battery cells. Deionized water is non-conductive, which also makes the internal environment more stable. Preferably, a liquid level sensor is also installed inside the casing 1 to measure the liquid level of the deionized water inside the casing 1. When the internal liquid level is high, the signal is fed back to the control system, which then controls the water pump to stop working or reduce the pumping flow rate. In this energy storage device, the hydrogen ion battery cells will release a large amount of carbon dioxide gas under abnormal conditions (such as battery explosion). Combined with the circulating water introduced into the hybrid structure energy storage device, this facilitates the spread of fire in the hybrid structure energy storage device and reduces the risk of explosion of the entire energy storage system.

[0035] See Figure 2 and Figure 4As shown, both the hydrogen-ion battery cell 4 and the lithium-ion battery cell 5 are mounted in the mounting cavity inside the housing 1 via a bracket 8. The bracket 8 includes: a bracket body 81, which is hollow inside and has a heat dissipation hole 82 on at least one side wall; spacers 83, with L-shaped spacers 83 at each of the four lower corners of the bracket body 81; and a positioning plate 84, which is located at the upper end of the bracket body 81, with a hollow center and protrusions 85 at each of the four corners. The bracket body 81 has a rectangular structure, and the interior of the bracket body 81 is used to place the batteries. The heat dissipation holes 82 of the battery cells are mainly used for heat dissipation of the battery cells. At the same time, since cooling water is circulated inside the housing 1, the heat dissipation holes 82 also facilitate the contact between the battery cell housing and the cooling water, thereby facilitating heat dissipation. The spacer block 83 and the positioning plate 84 ensure that there is a gap between each battery cell when they are arranged inside the housing 1. This gap can serve as a heat dissipation channel and can also be used as a flow channel for circulating deionized water to cool or heat the battery. The hollowed-out center of the positioning plate 84 is mainly used to expose the electrode positions of the battery cells to facilitate the connection of subsequent wires.

[0036] Both the hydrogen-ion battery cell 4 and the lithium-ion battery cell 5 include a battery body, a positive electrode disposed on the upper end of the battery body, a negative electrode disposed on the upper end of the battery body, and a vent hole disposed on the upper end of the battery body; in this technical solution, the structure of the battery cell is the prior art.

[0037] See Figure 2 and Figure 5 As shown, the upper end of the battery pack is also provided with a sealing plate 9. The surface of the sealing plate 9 is evenly provided with a plurality of lead-out holes 10. The electrodes of the hydrogen ion battery cell 4 and the lithium ion battery cell 5 are located in the lead-out holes 10. In this technical solution, the lead-out holes 10 are rectangular holes. The sealing plate 9 is used to separate the electrode part of the battery cell from the deionized water to prevent water vapor from affecting the internal environment. It is worth noting that a sealing ring is provided in the lead-out holes 10. The sealing ring can achieve a sealing effect and further isolate water vapor.

[0038] The outer side of the housing 1 is also provided with a handle 11; the handle 11 facilitates the handling of the energy storage device, and preferably, there are multiple handles 11.

[0039] Preferably, the exterior of the housing 1 is also provided with a control panel for real-time monitoring of various operating parameters of the hybrid energy storage device; the exterior of the housing 1 is also provided with a power interface, which is electrically connected to the battery cell.

[0040] Preferably, this technical solution also includes an energy management system, which can collect data such as voltage, current, temperature, and state of charge (SOC) of the hydrogen-ion battery module and the lithium-ion battery module in real time. Based on preset strategies and algorithms, such as different application scenarios (e.g., grid peak shaving, electric vehicle start-stop, etc.) and real-time load demands, the system coordinates the charging and discharging of the hydrogen-ion and lithium-ion battery modules. When high power output is required, priority is given to discharging the hydrogen-ion battery; when a long-term stable energy supply is needed, the lithium-ion battery is primarily discharged. Simultaneously, during charging, the charging power is rationally allocated according to the state of the two batteries to achieve efficient charging. A bidirectional DC-DC converter connects the hydrogen-ion and lithium-ion battery modules, enabling bidirectional energy flow between them. During charging, the input electrical energy is distributed to the hydrogen-ion and lithium-ion battery modules according to the instructions of the energy management system; during discharging, the electrical energy output from the hydrogen-ion and lithium-ion battery modules is integrated to meet load demands. It can adjust the voltage matching between different battery components to ensure the stable operation of the hybrid energy storage device; the gas pressure balance system: the hybrid energy storage device with a hybrid structure of hydrogen-ion batteries and lithium-ion batteries is equipped with a gas venting valve to balance the gas pressure inside the energy storage device. When the internal pressure is greater than a set threshold, the gas venting valve opens to release the excess gas pressure; the thermal management system: the hybrid energy storage device is also equipped with a cooling water inlet and a cooling water outlet. Through the circulation of deionized water, the battery is cooled and dissipated to maintain the battery's thermal balance; or the battery is heated to improve the battery's charging and discharging efficiency.

[0041] Hybrid energy storage device operation method

[0042] 1. Charging Process: When an external power source is connected, the energy management system calculates and allocates charging power based on the SOC and other state information of the hydrogen-ion and lithium-ion battery modules. If the SOC of the hydrogen-ion battery is low and requires rapid replenishment, more charging power is allocated to the hydrogen-ion battery charger, which then transfers electrical energy to the hydrogen-ion battery module for charging via a bidirectional DC-DC converter. Simultaneously, according to a preset ratio, a portion of the power is allocated to the lithium-ion battery charger to charge the lithium-ion battery module. During the charging process, the energy management system continuously monitors the status of both batteries, such as temperature and voltage. When either battery reaches full charge or an abnormal situation occurs, the charging strategy is adjusted promptly to ensure safe and efficient charging.

[0043] 2. Discharge Process: When the load requires electrical energy, the energy management system determines the appropriate power level based on the load's power demand and the state of the two battery types. For short-term high-power demands, such as rapid acceleration of an electric vehicle or instantaneous power compensation from the grid, the hydrogen-ion battery module is prioritized to discharge to the load via a bidirectional DC-DC converter, utilizing the high power density of the hydrogen-ion battery to quickly provide a large amount of electrical energy. For long-term stable power demands, such as continuous grid power supply or constant-speed driving of an electric vehicle, the lithium-ion battery module primarily discharges, leveraging its high energy density to ensure a sustained energy supply. During discharge, the energy management system monitors the battery's SOC and other state parameters in real time. When the SOC of any battery type becomes too low, the discharge strategy is adjusted promptly to prevent over-discharge.

[0044] 3. Status Monitoring and Protection: The energy management system monitors various parameters of the hydrogen-ion and lithium-ion battery modules in real time, including voltage, current, temperature, water level, and state of charge (SOC). If any abnormalities such as overcharging, over-discharging, overheating, or short circuits are detected, protective measures are immediately implemented, such as disconnecting the charging and discharging circuits of the corresponding battery modules and adjusting the energy flow by controlling the bidirectional DC-DC converter. Simultaneously, the energy management system records and analyzes the overall operating status of the hybrid energy storage device, providing data support for subsequent maintenance and optimization.

[0045] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A hybrid energy storage device combining hydrogen-ion and lithium-ion batteries, characterized in that, include: The housing (1) has an installation cavity inside, and the top of the housing (1) is provided with a cover plate, and the cover plate is provided with a drain valve (2). A partition (3) is disposed inside the housing (1) and divides the interior of the housing (1) into two parts; The battery pack is disposed inside the housing (1). The battery pack includes multiple hydrogen ion battery cells (4) and multiple lithium ion battery cells (5), which are arranged at intervals.

2. The energy storage device with a hybrid structure of hydrogen-ion battery and lithium-ion battery according to claim 1, characterized in that: The housing (1) has a first sidewall and a second sidewall that are arranged opposite to each other, and the first sidewall and the second sidewall are both perpendicular to the partition (3); A cooling water inlet (6) and a cooling water outlet (7) are provided on the first side wall, and the cooling water inlet (6) and the cooling water outlet (7) are located on both sides of the partition (3); Two outlets are provided on the second side wall. The two outlets are located on both sides of the partition (3) and are connected by a connecting conduit (12). Deionized water can be introduced into the housing (1) through the cooling water inlet (6).

3. The energy storage device with a hybrid structure of hydrogen-ion battery and lithium-ion battery according to claim 1, characterized in that, Both the hydrogen-ion battery cell (4) and the lithium-ion battery cell (5) are mounted in the mounting cavity inside the housing (1) via a bracket (8). The bracket (8) includes: The support body (81) is hollow inside, and at least one side wall of the support body (81) is provided with heat dissipation holes (82). The four corners of the lower end of the support body (81) are provided with L-shaped spacer blocks (83). Positioning plate (84): The upper end of the bracket body (81) is provided with positioning plate (84), the middle of positioning plate (84) is hollowed out, and the four corners of positioning plate (84) are provided with protrusions (85).

4. The energy storage device with a hybrid structure of hydrogen-ion battery and lithium-ion battery according to claim 1, characterized in that: Both the hydrogen-ion battery cell (4) and the lithium-ion battery cell (5) include a battery body, a positive electrode disposed on the upper end of the battery body, a negative electrode disposed on the upper end of the battery body, and a vent hole disposed on the upper end of the battery body.

5. The energy storage device with a hybrid structure of hydrogen-ion battery and lithium-ion battery according to claim 1, characterized in that: The upper end of the battery pack is also provided with a sealing plate (9), and the surface of the sealing plate (9) is uniformly provided with multiple lead-out holes (10), and the electrodes of the hydrogen ion battery cell (4) and the lithium ion battery cell (5) are located in the lead-out holes (10).

6. The energy storage device with a hybrid structure of hydrogen-ion battery and lithium-ion battery according to claim 1, characterized in that: The outer side of the housing (1) is also provided with a handle (11).

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