Novel fuel cell stack packaging structure

Abstract

The utility model discloses a novel fuel cell stack packaging structure, which relates to the technical field of cell packaging structures, and comprises an outer shell, a containing cavity is arranged in the outer shell, the upper end of the outer shell is provided with an opening, the opening of the upper end of the outer shell is connected with a sealing cover through a screw, and a plurality of uniformly arranged cell units are arranged in the outer shell. The upper ends of the battery units penetrate through the sealing cover; electrodes are arranged on the battery units, insulating sleeves wrap the surfaces of the electrodes, a heat dissipation mechanism is arranged at the upper end of the sealing cover, a shaft sleeve is rotatably installed between the two side plates, absorbent cotton is fixedly connected to the shaft sleeve and is cylindrical, and one side of the absorbent cotton faces the penetrating opening; according to the novel fuel cell stack packaging structure, when the pressure in the outer shell rises, the air pressure pushes the piston to move towards the outer side, and a gap is formed between the lower end of the piston and the penetrating opening, so that the air in the outer shell can be discharged from the gap, and the pressure in the outer shell is reduced in time.

Description

Technical Field

[0001] This utility model relates to the field of battery packaging structure technology, and in particular to a novel fuel cell stack packaging structure. Background Technology

[0002] A fuel cell stack, also known as an electrochemical generator, is a device that converts chemical energy into electrical energy. It is the core component of a hydrogen fuel cell power system, generating electrical energy through electrochemical reactions. Novel fuel cell stack encapsulation structures are a crucial part of proton exchange membrane fuel cell power generation systems, designed to improve the performance, reliability, and production efficiency of fuel cell stacks.

[0003] For example, the existing publication CN215578651U discloses a fuel cell stack packaging structure, fuel cell module, and fuel cell vehicle, specifically including an upper cover plate, a lower cover plate, a left side plate, a right side plate, a front end plate of the fuel cell stack, and a rear end plate of the fuel cell stack. The upper cover plate, lower cover plate, left side plate, and right side plate are all connected to the front end plate and rear end plate of the fuel cell stack to form a whole. This utility model, by incorporating the front end plate and rear end plate of the fuel cell stack as part of the packaging structure, and connecting the upper cover plate, lower cover plate, left side plate, and right side plate of the packaging structure to the front end plate and rear end plate of the fuel cell stack to form a whole, reduces the size and weight of the fuel cell module and lowers processing costs.

[0004] Existing fuel cell stack packaging structures are prone to pressure rise when the temperature increases. However, existing packaging structures do not have timely and effective pressure relief mechanisms, which leads to excessive internal pressure and leakage. To address this, we propose a novel fuel cell stack packaging structure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a novel fuel cell stack packaging structure that solves the problems mentioned in the background section.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a novel fuel cell stack packaging structure, comprising: an outer shell, wherein a cavity is provided inside the outer shell, an opening is provided at the upper end of the outer shell, a cover is connected to the opening at the upper end of the outer shell by screws, and a plurality of uniformly arranged battery units are installed inside the outer shell, wherein the upper end of the battery unit protrudes through the cover;

[0007] Each battery cell is equipped with electrodes, the surface of which is covered with an insulating sleeve. A heat dissipation mechanism is provided at the upper end of the cover, which contacts the upper end of the battery cell and is used to remove heat from the battery cell. An opening is provided on one side of the outer casing, and a piston is slidably disposed in the opening. The piston can seal the opening. A support base is fixedly installed inside the outer casing, and a spring is fixedly connected to the support base. The end of the spring is fixedly connected to the piston. Two spaced side plates are connected to one side of the outer casing by screws. A bushing is rotatably installed between the two side plates, and absorbent cotton is fixedly connected to the bushing. The absorbent cotton is cylindrical, and one side of the absorbent cotton faces the opening.

[0008] As a further technical solution of this utility model, the absorbent cotton is hollow inside, the internal cavity of the absorbent cotton is connected to the inner cavity of the bushing, an alarm light is fixedly installed on the outer shell, a detection probe is fixedly installed on the outer shell, the detection probe passes through the bushing and is inserted into the internal cavity of the absorbent cotton, and the detection probe is in contact with the absorbent cotton.

[0009] As a further technical solution of this utility model, a motor is fixedly installed on the side plate located on one side, and the output shaft of the motor is fixedly connected to the bushing. The motor can drive the absorbent cotton to rotate.

[0010] As a further technical solution of this utility model, the heat dissipation mechanism includes two spaced channels, which are fixedly installed on the outer shell. The channels are made of thermally conductive metal, and both ends of the channels are connected and fixedly installed with conduits. The conduits are connected to an external coolant supply device.

[0011] As a further technical solution of this utility model, the upper end of the electrode passes through the cover, and the bottom of the channel is provided with several openings, which are respectively arranged facing the electrode.

[0012] As a further technical solution of this utility model, a gap for heat dissipation is provided between the channel and the cover.

[0013] This invention provides a novel fuel cell stack packaging structure, which has the following advantages compared with the prior art:

[0014] 1. This design presents a novel fuel cell stack encapsulation structure. When the internal pressure of the outer casing rises, the air pressure pushes the piston to move outward, creating a gap between the lower end of the piston and the through-hole. This allows air inside the outer casing to escape through the gap, thereby reducing the pressure inside the outer casing in a timely manner. When electrolyte leakage occurs in the battery cell, the electrolyte can be discharged through the gap between the piston and the through-hole. At the same time, the absorbent cotton absorbs the overflowing electrolyte, preventing electrolyte leakage.

[0015] 2. This design presents a novel fuel cell stack packaging structure. The coolant circulation channel passes through a conduit on one side, and then the coolant enters a conduit on the other side through the channel. The conduit on the other side is connected to the coolant circulation channel, thus forming the coolant circulation channel. When the coolant flows in the channel, it passes through the opening. As the coolant passes through the opening, it can quickly and efficiently remove heat from the battery cells. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a novel fuel cell stack packaging structure;

[0017] Figure 2 This is a front view of a novel fuel cell stack packaging structure;

[0018] Figure 3 This is a partially enlarged schematic diagram of a novel fuel cell stack packaging structure.

[0019] Figure 4 This is a cross-sectional view of a novel fuel cell stack packaging structure.

[0020] In the diagram: 1. Outer shell; 2. Cover; 3. Battery unit; 4. Electrode; 5. Through-hole; 6. Piston; 7. Support seat; 8. Spring; 9. Side plate; 10. Bushing; 11. Absorbent cotton; 12. Alarm light; 13. Detection probe; 14. Motor; 15. Channel; 16. Conduit; 17. Opening. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4This utility model provides a novel fuel cell stack packaging structure technical solution: A novel fuel cell stack packaging structure includes an outer shell 1, with a cavity inside the outer shell 1. The upper end of the outer shell 1 is open, and a cover 2 is connected to the upper end of the outer shell 1 by screws. A plurality of uniformly arranged battery cells 3 are installed inside the outer shell 1, and the upper ends of the battery cells 3 protrude through the cover 2. Each battery cell 3 is provided with an electrode 4, and the surface of the electrode 4 is covered with an insulating sleeve. A heat dissipation mechanism is provided at the upper end of the cover 2, and the heat dissipation mechanism is in contact with the upper end of the battery cell 3. The casing 1 has an opening 5 on one side, and a piston 6 is slidably mounted inside the opening 5. The piston 6 can seal the opening 5. A support 7 is fixedly installed inside the casing 1, and a spring 8 is fixedly connected to the support 7. The end of the spring 8 is fixedly connected to the piston 6. Two spaced side plates 9 are connected to one side of the casing 1 by screws. A bushing 10 is rotatably mounted between the two side plates 9. A water-absorbing cotton 11 is fixedly connected to the bushing 10. The water-absorbing cotton 11 is cylindrical and one side faces the opening 5. When the internal pressure of the casing 1 increases, the air pressure pushes the piston 6 to move outward, creating a gap between the lower end of the piston 6 and the opening 5. This allows air inside the casing 1 to escape through the gap, thereby reducing the pressure inside the casing 1 in time. When the battery cell 3 leaks electrolyte, the electrolyte can be discharged through the gap between the piston 6 and the opening 5. At the same time, the water-absorbing cotton 11 absorbs the overflowing electrolyte, preventing electrolyte leakage.

[0023] Among them, such as Figure 3 and Figure 4 As shown, the absorbent cotton 11 is hollow inside, and its internal cavity communicates with the inner cavity of the bushing 10. An alarm light 12 is fixedly installed on the outer shell 1, and a detection probe 13 is also fixedly installed on the outer shell 1. The detection probe 13 passes through the bushing 10 and is inserted into the internal cavity of the absorbent cotton 11, making contact with the absorbent cotton 11. A motor 14 is fixedly installed on the side plate 9 on one side, and the output shaft of the motor 14 is fixedly connected to the bushing 10. The motor 14 can drive the absorbent cotton 11 to rotate. The heat dissipation mechanism includes two spaced channels 15, which are fixedly installed on the outer shell 1. The channels 15 are made of thermally conductive metal, and both ends of the channels 15 are connected and fixedly installed with conduits 16, which are connected to an external coolant supply device. The upper end of the electrode 4 passes through the cover 2, and several openings 17 are provided at the bottom of the channel 15, with the openings 17 facing the electrode 4. A gap for heat dissipation is provided between the channel 15 and the cover 2.

[0024] The working principle of this invention is as follows: When the internal pressure of the outer casing 1 increases, the air pressure pushes the piston 6 to move outward, creating a gap between the lower end of the piston 6 and the through-hole 5. This allows air inside the outer casing 1 to escape through the gap, thus reducing the pressure inside the outer casing 1 in a timely manner. When electrolyte leakage occurs in the battery cell 3, the electrolyte can be discharged through the gap between the piston 6 and the through-hole 5. Simultaneously, the absorbent cotton 11 absorbs the overflowing electrolyte, preventing further leakage. This design helps avoid damage to the fuel cell stack caused by excessive internal stress in the outer casing 1, improving the overall performance and stability of the fuel cell stack and reducing the risk of component deformation or damage due to excessive sealing force. It also effectively prevents electrolyte leakage from corroding and damaging the fuel cell stack and the surrounding environment. This not only extends the service life of the fuel cell stack but also improves the safety of the entire fuel cell system.

[0025] The coolant circulation channel passes through the conduit 16 on one side, and then the coolant enters the conduit 16 on the other side through the channel 15. The conduit 16 on the other side is connected to the coolant circulation channel, thus forming the coolant circulation channel. When the coolant flows in the channel 15, it passes through the port 17. When the coolant passes through the port 17, it can quickly and efficiently remove the heat from the battery cell 3.

[0026] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A novel fuel cell stack packaging structure, characterized in that, include: The outer shell (1) has a cavity inside and an opening at the top. A cover (2) is connected to the opening at the top of the outer shell (1) by screws. Several battery units (3) are installed inside the outer shell (1) and the upper end of the battery unit (3) extends through the cover (2). Each battery unit (3) is provided with an electrode (4), the surface of the electrode (4) is covered with an insulating sleeve, the upper end of the cover (2) is provided with a heat dissipation mechanism, the heat dissipation mechanism is in contact with the upper end of the battery unit (3) and is used to remove the heat on the battery unit (3), a through hole (5) is opened on one side of the outer shell (1), a piston (6) is slidably arranged in the through hole (5), the piston (6) can block the through hole (5), a support seat (7) is fixedly installed in the outer shell (1), a spring (8) is fixedly connected on the support seat (7), the end of the spring (8) is fixedly connected to the piston (6), two spaced side plates (9) are connected to one side of the outer shell (1) by screws, a bushing (10) is rotatably installed between the two side plates (9), a water-absorbing cotton (11) is fixedly connected on the bushing (10), the water-absorbing cotton (11) is cylindrical, and one side of the water-absorbing cotton (11) faces the through hole (5).

2. The novel fuel cell stack packaging structure according to claim 1, characterized in that, The absorbent cotton (11) is hollow inside, and the cavity inside the absorbent cotton (11) is connected to the cavity inside the bushing (10). An alarm light (12) is fixedly installed on the outer shell (1), and a detection probe (13) is fixedly installed on the outer shell (1). The detection probe (13) passes through the bushing (10) and is inserted into the cavity inside the absorbent cotton (11). The detection probe (13) is in contact with the absorbent cotton (11).

3. The novel fuel cell stack packaging structure according to claim 2, characterized in that, A motor (14) is fixedly installed on the side plate (9) located on one side. The output shaft of the motor (14) is fixedly connected to the bushing (10). The motor (14) can drive the absorbent cotton (11) to rotate.

4. The novel fuel cell stack packaging structure according to claim 3, characterized in that, The heat dissipation mechanism includes two spaced channels (15), which are fixedly installed on the outer shell (1). The channels (15) are made of thermally conductive metal, and both ends of the channels (15) are connected and fixedly installed with conduits (16). The conduits (16) are connected to an external coolant supply device.

5. A novel fuel cell stack packaging structure according to claim 4, characterized in that, The upper end of the electrode (4) passes through the cover (2), and the bottom of the channel (15) is provided with several openings (17), which are respectively positioned facing the electrode (4).

6. A novel fuel cell stack packaging structure according to claim 5, characterized in that, A gap for heat dissipation is provided between the channel (15) and the cover (2).

Images