Electric pile with heating function for vanadium redox flow battery
By setting up a heating mechanism on the end plate of the flow battery and directly heating it with the PTC ceramic heating body, the problem of degradation of battery performance at low temperatures is solved, and efficient temperature control and energy consumption optimization are achieved.
Patent Information
- Application Number
- CN202422356321.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The existing flow batteries have low power unit temperatures in low temperature environments, resulting in a degradation of battery performance, and the existing heating methods are inefficient and have high energy consumption.
A heating mechanism is arranged on the end plate, including a heating plate, a press plate and a cover plate, which directly transfers heat through the conductor, uses a PTC ceramic heating element as a heating source, and ensures that heat does not dissipate through the elastic member and the sealing ring.
It achieves efficient heating, improves battery temperature, improves battery performance, and avoids heat loss and energy consumption waste.
Smart Images
Figure CN223273303U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of vanadium redox flow battery stacks, and in particular to a vanadium redox flow battery stack with a heating function. Background Art
[0002] An all-vanadium flow battery is a redox battery with vanadium as the active material in a circulating liquid state. The electrical energy of a vanadium battery is stored as chemical energy in a sulfuric acid electrolyte containing vanadium ions of varying valences. The electrolyte is pumped into the battery stack via an external pump. Mechanical power causes it to circulate in a closed loop between the storage tank and the stack. Using a proton exchange membrane as the separator of the battery pack, the electrolyte solution flows parallel to the electrode surface, generating an electrochemical reaction. Current is collected and conducted through dual electrode plates, converting the chemical energy stored in the solution into electrical energy. The battery primarily consists of two end plates and a battery cell assembly positioned between them.
[0003] The optimal operating temperature for flow battery power units is between 30°C and 40°C. Within this temperature range, the battery achieves maximum efficiency, energy density, and lifespan. Excessively high or low temperatures can degrade battery performance and even pose safety risks. Most existing flow batteries lack self-heating capabilities, or the battery stack is placed inside a container and heated indirectly via the container's air conditioner or electric fans. This indirect heat transfer through air is inefficient, with much of the heat wasted and resulting in high energy consumption. Utility Model Content
[0004] In order to solve the problem of low temperature of the flow battery power unit in a low temperature environment, which leads to a decrease in battery performance, the present application provides a vanadium flow battery stack with a heating function, which adopts the following technical solutions:
[0005] A vanadium liquid flow battery stack with a heating function includes two oppositely arranged end plates and a heating mechanism installed on the end plates. The heating mechanism includes a heating plate and a pressing plate for placing the heating plate. The pressing plate is provided with a groove for embedding the heating plate, and the end plate is provided with a first card slot for embedding the pressing plate. The heating plate is located between the end plate and the pressing plate.
[0006] Optionally, the thickness of the heating plate is greater than the depth of the groove.
[0007] Optionally, the heating mechanism further includes a cover plate, the cover plate is provided with a second slot for embedding the pressure plate, and the pressure plate is embedded in the first slot and the second slot at the same time.
[0008] Optionally, the end plate is further provided with a receiving groove for embedding the cover plate, the first slot is provided on the bottom wall of the receiving groove, and the cover plate is penetrated with bolts for fixing the cover plate and the end plate.
[0009] Optionally, a sealing groove surrounding the first clamping groove is formed on the bottom wall of the accommodating groove, and a sealing ring is provided in the sealing groove, and the sealing ring is clamped between the cover plate and the end plate.
[0010] Optionally, a steel plate is provided on the side of the pressure plate away from the heating plate, and an elastic member is provided on the steel plate. The elastic member includes a support plate away from but parallel to the pressure plate, and a connecting plate connected between the support plate and the pressure plate, and the support plate is pressed against the bottom wall of the second slot.
[0011] Optionally, a sliding groove for sliding the steel plate is provided on the pressing plate, and the steel plate is detachably connected to the sliding groove.
[0012] Optionally, a first avoidance groove connected to the first card groove is opened on the bottom wall of the accommodating groove, a second avoidance groove connected to the groove is opened on the pressure plate, and the first avoidance groove is connected to the second avoidance groove.
[0013] Optionally, four heating mechanisms are provided on each end plate, and the four heating mechanisms are arranged in a circular array.
[0014] This application includes at least one of the following beneficial technical effects:
[0015] 1. The heating plate is in direct contact with the end plate, and the heat transfer efficiency through the conductor is high;
[0016] 2. The heating plate is wrapped by the pressing plate and the cover plate, which can effectively prevent heat loss;
[0017] 3. Under the action of the elastic force of the elastic member, the heating plate is pressed against the end plate, avoiding a gap between the heating plate and the end plate to cause poor heating. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.
[0019] Figure 2 It is a partial exploded view of an embodiment of the present application.
[0020] Figure 3 yes Figure 2 A partial enlarged view of middle A.
[0021] Figure 4 It is a partial structural diagram of an embodiment of the present application.
[0022] Figure 5 It is a partial structural diagram of an embodiment of the present application.
[0023] Explanation of the accompanying drawings: 1. End plate; 11. Accommodating groove; 111. Sealing groove; 112. First card slot; 113. First avoidance groove; 114. Threaded hole; 2. Heating plate; 3. Pressing plate; 31. Groove; 32. Second avoidance groove; 33. Slide groove; 4. Steel plate; 41. Connecting plate; 42. Support plate; 5. Cover plate; 51. Second card slot; 52. Avoidance hole; 6. Waterproof joint; 7. Sealing ring. DETAILED DESCRIPTION
[0024] The following is combined with Figure 1-5 This application is described in further detail.
[0025] The present application discloses a vanadium redox flow battery stack with a heating function. Figure 1 A vanadium liquid flow battery stack with a heating function includes two end plates 1 and a battery cell (not shown in the figure) between the two end plates 1. Four heating mechanisms are arranged on the outside of each end plate 1. The four heating mechanisms are distributed at equal intervals, and the connecting line of the four heating mechanisms is a square.
[0026] refer to Figure 2 、 Figure 3 The end plate 1 is provided with a receiving groove 11 for placing the heating mechanism. The receiving groove 11 is a rectangular groove. The bottom wall of the receiving groove 11 is provided with a first card groove 112 whose length and width are smaller than the receiving groove 11, and a circle of sealing grooves 111 surrounding the first card groove 112.
[0027] refer to Figure 3 、 Figure 4 The heating mechanism includes a heating plate 2, a pressing plate 3 for pressing the heating plate 2, and a cover plate 5 for covering the pressing plate 3 and the heating plate 2. The pressing plate 3 is located between the heating plate 2 and the cover plate 5. The heating plate 2 is a rectangular parallelepiped and is made of a PTC ceramic heating element. The pressing plate 3 is in the shape of a rectangular parallelepiped. A groove 31 with the same size (length and width) as the heating plate 2 is opened on the end surface of the pressing plate 3 close to the heating plate 2, but the depth of the groove 31 is less than the thickness of the heating plate 2, so that after the heating plate 2 is embedded in the groove 31, the end surface is higher than the pressing plate 3.
[0028] refer to Figure 4 、 Figure 5 The end surface of the pressing plate 3 away from the heating plate 2 is provided with a slide groove 33, in which a steel plate 4 is slidably connected. Two elastic members are formed on the steel plate 4. The manufacturing process of the elastic members is as follows: cutting along two parallel lines on the steel plate 4, and then cutting along the lines connected to the end points of the two parallel lines. After cutting, a steel sheet separated from the main body of the steel plate 4 is formed. The steel sheet is then bent to form a support plate 42 parallel to the steel plate 4 and a connecting plate 41 connected between the support plate 42 and the steel plate 4. The two elastic members are arranged in sequence along the length direction of the steel plate 4.
[0029] refer to Figure 3 、 Figure 4 One side of the cover plate 5 is provided with a groove for embedding the pressure plate 3 and the second groove 51. The first groove 112 corresponds to the second groove 51. A portion of the pressure plate 3 is embedded in the first groove 112, and a portion is embedded in the second groove 51. The cover plate 5 is embedded in the accommodating groove 11, and the cover plate 5 and the end plate 1 are in the same plane. A sealing ring 7 is embedded in the sealing groove 111, and the sealing ring 7 is pressed tightly between the cover plate 5 and the end plate 1.
[0030] refer to Figure 4 、 Figure 5 A first avoidance groove 113 is formed on the bottom wall of the receiving groove 11 and is connected to the first card groove 112. A second avoidance groove 32 is formed on the pressing plate 3 and is connected to the groove 31. The first avoidance groove 113 is connected to the second avoidance groove 32. A waterproof connector 6 is installed on the end plate 1. The waterproof connector 6 is used to pass the wires. The wires pass through the waterproof connector 6 and pass through the first avoidance groove 113 and the second avoidance groove 32 to connect to the heating plate 2.
[0031] refer to Figure 3 、 Figure 5 The four corners of the end plate 1 are provided with avoidance holes 52, and the bottom wall of the accommodating groove 11 is provided with threaded holes 114 corresponding to the avoidance holes 52. Bolts are passed through the avoidance holes 52 and screwed into the threaded holes 114 to fix the cover plate 5 and the end plate 1.
[0032] The implementation principle of a vanadium redox flow battery stack with a heating function in the embodiment of the present application is as follows:
[0033] 1. Clamp the heating plate 2 onto the pressing plate 3.
[0034] 2. Slide the steel plate 4 into the slide groove 33.
[0035] 3. The pressing plate 3 and the sealing ring 7 are respectively embedded in the first card groove 112 and the sealing ring 7 , and the wires pass through the second avoidance groove 32 , the first avoidance groove 113 , and the waterproof connector 6 .
[0036] Fourth, insert the cover plate 5 into the receiving groove 11 and tighten the bolts to fix the cover plate 5 and the end plate 1.
[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A vanadium redox flow battery stack with a heating function, comprising two end plates (1) arranged opposite to each other, characterized in that: The heating mechanism is also included, which is mounted on the end plate (1). The heating mechanism includes a heating plate (2) and a pressing plate (3) for placing the heating plate (2); a groove (31) for embedding the heating plate (2) is provided on the pressing plate (3); a first clamping groove (112) for embedding the pressing plate (3) is provided on the end plate (1); and the heating plate (2) is located between the end plate (1) and the pressing plate (3).
2. The vanadium redox flow battery stack with heating function according to claim 1, characterized in that: The thickness of the heating plate (2) is greater than the depth of the groove (31).
3. The vanadium redox flow battery stack with heating function according to claim 2, characterized in that: The heating mechanism further comprises a cover plate (5), the cover plate (5) being provided with a second card slot (51) for embedding the pressing plate (3), and the pressing plate (3) being embedded in both the first card slot (112) and the second card slot (51).
4. The vanadium redox flow battery stack with heating function according to claim 3, characterized in that: The end plate (1) is also provided with a receiving groove (11) for embedding the cover plate (5), the first clamping groove (112) is provided on the bottom wall of the receiving groove (11), and the cover plate (5) is penetrated by bolts for fixing the cover plate (5) and the end plate (1).
5. The vanadium redox flow battery stack with heating function according to claim 4, characterized in that: The bottom wall of the accommodating groove (11) is provided with a sealing groove (111) surrounding the first clamping groove (112); a sealing ring (7) is provided in the sealing groove (111); and the sealing ring (7) is clamped between the cover plate (5) and the end plate (1).
6. The vanadium redox flow battery stack with heating function according to claim 5, characterized in that: A steel plate (4) is provided on the side of the pressing plate (3) away from the heating plate (2), and an elastic member is provided on the steel plate (4). The elastic member includes a support plate (42) away from but parallel to the pressing plate (3), and a connecting plate (41) connected between the support plate (42) and the pressing plate (3), and the support plate (42) is pressed against the bottom wall of the second slot (51).
7. The vanadium redox flow battery stack with heating function according to claim 6, characterized in that: The pressing plate (3) is provided with a sliding groove (33) for the steel plate (4) to slide, and the steel plate (4) is detachably connected to the sliding groove (33).
8. The vanadium redox flow battery stack with heating function according to claim 7, characterized in that: A first avoidance groove (113) communicating with the first clamping groove (112) is provided on the bottom wall of the accommodating groove (11), a second avoidance groove (32) communicating with the groove (31) is provided on the pressing plate (3), and the first avoidance groove (113) is communicated with the second avoidance groove (32).
9. The vanadium redox flow battery stack with heating function according to claim 8, characterized in that: Each end plate (1) is provided with four heating mechanisms, and the four heating mechanisms are arranged in a circular array.