Phase change heat storage type power supply heat preservation box body

Abstract

The utility model relates to the technical field of lead-acid power supply heat preservation devices, in particular to a phase change heat storage type power supply heat preservation box body. The phase change heat storage type power supply heat preservation box comprises a shell and an upper cover matched with the shell, an upper heat insulation layer is arranged on the inner side of the upper cover, an inner heat insulation layer is arranged on the inner wall of the shell, flame-retardant self-temperature-control heat tracing bands are arranged on the inner heat insulation layer, and a plurality of circles of flame-retardant self-temperature-control heat tracing bands are arranged along the inner wall of the inner heat insulation layer. The inner container is detachably installed in the shell through supporting legs at the bottom, the inner container and the inner heat insulation layer do not make contact with each other, and a cavity formed between the outer wall of the inner container and the inner wall of the inner heat insulation layer is a heat storage cavity; the upper part of the shell is provided with a liquid injection port and a pressure relief port, and the lower part of the shell is provided with a liquid discharge port; a flexible bag is detachably arranged in the heat storage cavity, and a heat storage agent is injected into the flexible bag. According to the utility model, the working temperature of the storage battery power supply can be kept appropriate for a long time, and the actual discharge capacity of the lead-acid storage battery power supply in a cold environment is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lead-acid power supply insulation devices, in particular to a phase-change heat storage power supply insulation box. Background Art

[0002] Electric forklifts are a staple of handling equipment, primarily powered by lead-acid battery power supplies. Electric forklifts operate in a wide variety of environments, and their working environments vary widely. Electric forklifts are often used to handle cargo in cold storage. The discharge capacity of a lead-acid battery power supply is closely related to the discharge temperature: at 30°C, the discharge capacity is 100% of the rated capacity; at 0°C, it is 90% of the rated capacity; and at -20°C, it is only 60% of the rated capacity. When operating in a cold storage environment, the lead-acid battery power supply dissipates heat into the cold storage, and without heat compensation, the power supply unit's operating temperature remains low, reducing its actual discharge capacity.

[0003] Phase-change thermal storage materials are a special type of thermal storage material that utilizes the phase change process of matter to store energy. Phase change refers to the process by which a substance's physical phase (solid, liquid, gas, etc.) changes. Phase-change thermal storage materials can absorb or release large amounts of heat through phase change within a specific temperature range, thereby achieving energy storage and utilization. Phase-change thermal storage materials have the characteristics of high density, high specific heat, low pollution, and easy adjustment. In addition, they can absorb heat outside of a certain temperature range, thereby achieving the purpose of heat storage. Utility Model Content

[0004] The technical problem to be solved by the utility model is to propose a phase change thermal storage power supply insulation box, which can keep the working temperature of the battery power supply suitable for a long time and effectively improve the actual discharge capacity of the lead-acid battery power supply in cold environment.

[0005] The phase-change thermal storage power supply insulation box of the utility model comprises a shell and an upper cover adapted to the shell, an upper insulation layer is provided on the inner side of the upper cover, an inner insulation layer is provided on the inner wall of the shell, a flame-retardant self-controlling temperature heating belt is provided on the inner insulation layer, and the flame-retardant self-controlling temperature heating belt is provided in several circles along the inner wall of the inner insulation layer;

[0006] The heat storage chamber is formed by the outer wall of the inner liner and the inner wall of the inner insulation layer. The heat storage chamber is formed between the outer wall of the inner liner and the inner wall of the inner insulation layer. The upper part of the shell is provided with a liquid filling port and a pressure relief port, and the lower part of the shell is provided with a liquid discharge port. The liquid filling port, the pressure relief port and the liquid discharge port are all connected to the heat storage chamber.

[0007] A flexible bag is detachably provided in the heat storage cavity, and the flexible bag is filled with heat storage agent. The flexible bag is provided with a liquid inlet, an exhaust port and a liquid outlet corresponding to the liquid injection port, the pressure relief port and the liquid discharge port respectively.

[0008] Preferably, a groove is provided on the inner heat-insulating layer, a flame-retardant self-controlling temperature heating belt is installed in the groove, and the outer side of the flame-retardant self-controlling temperature heating belt is not lower than the opening of the groove.

[0009] Preferably, it also includes a temperature sensor and an alarm. The temperature sensor is arranged in the inner cavity of the inner tank. The temperature sensor is electrically connected to the alarm. When the temperature is too low, an alarm can be sounded to remind the staff to replace the flexible bag in time or reheat the heat storage agent in time.

[0010] Preferably, the support legs and the housing are connected by interference fit.

[0011] Preferably, the liquid injection port, the pressure relief port and the liquid discharge port are respectively provided with a heat-insulating plug.

[0012] Preferably, the flexible bag is made of a flexible heat-conductive film, and is provided with a plurality of through holes for the support legs to pass through. A fixing hole is provided on the upper part of the flexible bag, and the upper part of the flexible bag is fixed to the inner insulation layer by a fixing bolt that passes through the shell, the inner insulation layer and the fixing hole in sequence from the outside.

[0013] Preferably, a positioning groove is provided on the inner container, and the fixing bolt extends into the positioning groove and is arranged corresponding to the positioning groove. The fixing bolt plays a positioning role for the inner container and prevents the upper part of the inner container from moving.

[0014] Preferably, the liquid inlet, the exhaust port and the liquid outlet are respectively provided with sealing screw caps.

[0015] Preferably, the inner insulation layer and the upper insulation layer are respectively one of rock wool board, XPS board and EPS board.

[0016] Preferably, the heat storage agent is a compound of one or more of polyethylene glycol 300, polyethylene glycol 400, water and paraffin.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. Before use, the flame-retardant, self-controlling electric heating tape is turned on to melt the heat storage agent in the flexible capsule and heat it to a specific temperature to complete heat storage. When used in a cold environment, the heat storage agent in the heat storage chamber cools down to the freezing point, undergoes a phase change, and releases heat to compensate for heat loss during use. The upper and inner insulation layers have low thermal conductivity, which can reduce the heat dissipation rate of the internal power supply device.

[0019] 2. The heat storage agent is stored in a flexible bag, which is placed in the heat storage cavity, so that impurities inside the heat storage agent will not remain in the heat storage cavity. When the heat storage agent has been used for too long and impurities are generated inside and needs to be replaced, the inner tank is removed after the heat storage agent is emptied and the flexible bag is replaced. There is no need to clean the inside of the heat storage cavity, which is convenient to use.

[0020] 3. The setting of the flexible bag makes the entire device easier to maintain. During maintenance, it is only necessary to remove the flexible bag together with the heat storage agent as a whole without emptying the heat storage agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 yes Figure 1 A in the middle is an enlarged structural diagram;

[0023] Figure 3 This is a schematic diagram of the flexible bag deployment structure of the utility model;

[0024] Figure 4 This is a side view of the inner container structure of the utility model;

[0025] In the figure: 1. Shell; 2. Upper cover; 3. Upper insulation layer; 4. Inner insulation layer; 5. Flame-retardant self-controlling temperature heating tape; 6. Inner liner; 7. Support legs; 8. Heat storage chamber; 9. Liquid filling port; 10. Pressure relief port; 11. Liquid drain port; 12. Flexible bladder; 13. Liquid inlet; 14. Exhaust port; 15. Liquid outlet; 16. Groove; 17. Temperature sensor; 18. Alarm; 19. Insulation plug; 20. Fixing bolt; 21. Positioning groove; 22. Sealing screw cap; 23. Through hole; 24. Fixing hole. DETAILED DESCRIPTION

[0026] The present invention will be described clearly and completely below with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figure 1 As shown, the phase-change thermal storage power supply insulation box of the present invention includes a shell 1 and an upper cover 2 adapted to the shell 1. An upper insulation layer 3 is provided on the inner side of the upper cover 2. An inner insulation layer 4 is provided on the inner wall of the shell 1. A flame-retardant self-controlling temperature heating belt 5 is provided on the inner insulation layer 4. The flame-retardant self-controlling temperature heating belt 5 is provided with several circles along the inner wall of the inner insulation layer 4.

[0029] The housing 1 further includes an inner liner 6, which is detachably mounted within the housing 1 via supporting legs 7 at the bottom. The inner liner 6 and the inner insulation layer 4 do not contact each other, and a cavity formed between the outer wall of the inner liner 6 and the inner wall of the inner insulation layer 4 serves as a heat storage chamber 8. A liquid injection port 9 and a pressure relief port 10 are provided at the upper portion of the housing 1, and a liquid discharge port 11 is provided at the lower portion of the housing 1. The liquid injection port 9, the pressure relief port 10, and the liquid discharge port 11 are all in communication with the heat storage chamber 8.

[0030] A flexible bag 12 is detachably provided in the heat storage chamber 8. The flexible bag 12 is filled with heat storage water. The flexible bag 12 is provided with a liquid inlet 13, an exhaust port 14 and a liquid outlet 15 corresponding to the liquid injection port 9, the pressure relief port 10 and the liquid discharge port 11 respectively.

[0031] A groove 16 is provided on the inner heat-insulating layer 4 , and a flame-retardant self-controlling temperature heating belt 5 is installed in the groove 16 . The outer side of the flame-retardant self-controlling temperature heating belt 5 is not lower than the opening of the groove 16 .

[0032] It also includes a temperature sensor 17 and an alarm 18. The temperature sensor 17 is arranged in the inner cavity of the inner liner 6. The temperature sensor 17 is electrically connected to the alarm 18. When the temperature is too low, the alarm can be sounded to remind the staff to replace the flexible bag 12 in time.

[0033] The supporting legs 7 are connected to the housing 1 by interference fit.

[0034] The liquid injection port 9, the pressure relief port 10 and the liquid discharge port 11 are respectively provided with a heat insulation plug 19.

[0035] like Figure 2 As shown, the flexible bag 12 is made of a flexible heat-conductive film, and a plurality of through holes 23 are provided on the flexible bag 12 for the support legs 7 to pass through. A fixing hole 24 is provided on the upper part of the flexible bag 12. The upper part of the flexible bag 12 is fixed to the inner insulation layer 4 by a fixing bolt 20 that passes through the shell 1, the inner insulation layer 4 and the fixing hole 24 in sequence from the outside.

[0036] like Figure 3 As shown, a positioning groove 21 is provided on the inner liner 6 , and the fixing bolt 20 extends into the positioning groove 21 and is arranged corresponding to the positioning groove 21 .

[0037] The liquid inlet 13 , the exhaust port 14 and the liquid outlet 15 are respectively provided with sealing screw covers 22 .

[0038] In this embodiment 1, the shell 1 is welded with 3 mm thick steel plates after the inner and outer surfaces are treated with plastic dipping; the inner liner 6 is welded with 8 mm thick steel plates after the inner and outer surfaces are treated with plastic dipping; the inner insulation layer 4 and the upper insulation layer 3 are both rock wool boards with a thermal conductivity of 0.04 W / (m·℃) and a thickness of 20 mm.

[0039] The working process is as follows:

[0040] Remove the inner liner 6 from the shell 1, and place the flexible bag 12 against the inner insulation layer 4. Note that the liquid filling port 9, the pressure relief port 10 and the liquid discharge port 11 correspond to the liquid inlet 13, the exhaust port 14 and the liquid outlet 15 respectively, and fix the flexible bag 12 to the inner insulation layer 4 with the fixing bolt 20; fix the support legs 7 of the inner liner 6 to the shell 1 after passing through the through hole 23. When placing the inner liner 6 into the shell 1, pay attention to the positioning groove 21 corresponding to the fixing bolt 20; punch the exhaust port 14, and inject the heat storage agent paraffin into the flexible bag 12 through the liquid inlet 13. The flexible bag 12 expands as the heat storage agent is injected and fills the heat storage chamber 8. After the injection is completed, tighten the sealing screw caps 22 on the exhaust port 14 and the liquid inlet 13, and seal the liquid filling port 9, the pressure relief port 10 and the liquid discharge port 11 with the insulation plug 19.

[0041] The battery 40-4PzS480H power supply device is charged, and the battery electrolyte is kept at a constant temperature of 30°C. The flame retardant self-controlling temperature heating tape 5 heats the heat storage agent to 35°C. The power supply device is placed in the box of the utility model, covered with the upper cover 2, and then placed in a -20°C environment. It is discharged at a current of 96A, and the actual discharge capacity is 465Ah.

[0042] When the housing 1 needs to be repaired during use, it is only necessary to remove the inner liner 6, take out the fixing bolt 20, and then remove the flexible bag 12 for repair;

[0043] When the heat storage agent ages and contains too many impurities and needs to be replaced, the liquid outlet and the exhaust port 14 are opened to drain the heat storage agent. Then, only the flexible bag 12 needs to be replaced, and the heat storage chamber 8 does not need to be cleaned.

[0044] Comparative Example 1

[0045] The same battery 40-4PzS480H power supply device as in Example 1 was charged, and the battery electrolyte was kept at a constant temperature of 30°C, then placed in a -20°C environment and discharged at a current of 96A. The actual discharge capacity was 353Ah.

[0046] Example 2

[0047] The difference between the box structure of Example 2 and Example 1 is that the heat storage agent is paraffin, the inner insulation layer 4 and the upper insulation layer 3 are both XPS boards with a thermal conductivity of 0.035 W / (m·℃) and a thickness of 15 mm.

[0048] The battery 24-4PzS480H power supply device is charged, and the battery electrolyte is kept at a constant temperature of 30°C. The flame retardant self-controlling temperature heating tape 5 heats the heat storage agent to 40°C. The power supply device is placed in the box of the utility model, covered with the upper cover 2, and then placed in a -20°C environment. It is discharged at a current of 96A, and the actual discharge capacity is 463Ah.

[0049] Comparative Example 2

[0050] The same battery 24-4PzS480H power supply device as in Example 2 was charged, and the battery electrolyte was kept at a constant temperature of 30°C, then placed in a -20°C environment and discharged at a current of 96A. The actual discharge capacity was 372Ah.

[0051] Example 3

[0052] The box structure of this embodiment 3 is different from that of embodiment 1 in that the heat storage agent is paraffin, the inner insulation layer 4 and the upper insulation layer 3 are both EPS boards with a thermal conductivity of 0.03W / (m·℃) and a thickness of 25mm.

[0053] The battery 12-2PzS240H power supply device is charged, and the battery electrolyte is kept at a constant temperature of 30°C. The flame retardant self-controlling temperature heating tape 5 heats the heat storage agent to 25°C. The power supply device is placed in the box of the utility model, covered with the upper cover 2, and then placed in a -20°C environment and discharged at a current of 48A. The actual discharge capacity is 227Ah.

[0054] Comparative Example 3

[0055] The same battery 12-2PzS240H power supply device as in Example 3 was charged, and the battery electrolyte was kept at a constant temperature of 30°C. It was then placed in a -20°C environment and discharged at a current of 48A. The actual discharge capacity was 138Ah.

[0056] It can be seen from Example 1 and Comparative Example 1, Example 2 and Comparative Example 2, and Example 3 and Comparative Example 3 that the utility model effectively improves the actual discharge capacity of the battery power supply in a cold environment.

Claims

1. A phase-change thermal storage power supply insulation box, comprising a shell (1) and an upper cover (2) adapted to the shell (1), characterized in that: An upper heat insulation layer (3) is provided on the inner side of the upper cover (2), an inner heat insulation layer (4) is provided on the inner wall of the shell (1), a flame retardant self-controlling temperature heating belt (5) is provided on the inner heat insulation layer (4), and a plurality of circles of the flame retardant self-controlling temperature heating belt (5) are provided along the inner wall of the inner heat insulation layer (4); The heat storage device further comprises an inner liner (6), wherein the inner liner (6) is detachably mounted in the shell (1) via supporting legs (7) at the bottom, the inner liner (6) and the inner heat insulation layer (4) are not in contact with each other, and a cavity formed between the outer wall of the inner liner (6) and the inner wall of the inner heat insulation layer (4) is a heat storage cavity (8); a liquid injection port (9) and a pressure relief port (10) are provided at the upper portion of the shell (1), and a liquid discharge port (11) is provided at the lower portion of the shell (1); the liquid injection port (9), the pressure relief port (10) and the liquid discharge port (11) are all in communication with the heat storage cavity (8); A flexible bag (12) is detachably provided in the heat storage chamber (8), and a heat storage agent is injected into the flexible bag (12). A liquid inlet (13), an exhaust port (14), and a liquid outlet (15) are respectively provided on the flexible bag (12) corresponding to the liquid injection port (9), the pressure relief port (10), and the liquid discharge port (11).

2. The phase change thermal storage power supply insulation box according to claim 1, characterized in that: A groove (16) is provided on the inner heat insulation layer (4), a flame retardant self-controlling temperature heating belt (5) is installed in the groove (16), and the outer side of the flame retardant self-controlling temperature heating belt (5) is not lower than the opening of the groove (16).

3. The phase change thermal storage power supply insulation box according to claim 1, characterized in that: It also includes a temperature sensor (17) and an alarm (18); the temperature sensor (17) is arranged in the inner cavity of the inner container (6); the temperature sensor (17) is electrically connected to the alarm (18).

4. The phase change thermal storage power supply insulation box according to claim 1, characterized in that: The supporting leg (7) and the housing (1) are connected by interference fit.

5. The phase change thermal storage power supply insulation box according to claim 1, characterized in that: The liquid injection port (9), the pressure relief port (10) and the liquid discharge port (11) are respectively provided with heat-insulating plugs (19).

6. The phase change thermal storage power supply insulation box according to claim 1, characterized in that: The flexible bag (12) is provided with a plurality of through holes (23) for the support legs (7) to pass through, and the upper portion of the flexible bag (12) is provided with a fixing hole (24). The upper portion of the flexible bag (12) is fixed to the inner heat insulation layer (4) by a fixing bolt (20) which passes through the shell (1), the inner heat insulation layer (4) and the fixing hole (24) in sequence from the outside.

7. The phase-change thermal storage power supply insulation box according to claim 6, characterized in that: The inner container (6) is provided with a positioning groove (21), and the fixing bolt (20) extends into the positioning groove (21) and is arranged corresponding to the positioning groove (21).

8. The phase change thermal storage power supply insulation box according to claim 1, characterized in that: The liquid inlet (13), the air outlet (14) and the liquid outlet (15) are respectively provided with sealing screw covers (22).

9. The phase-change thermal storage power supply insulation box according to claim 1, characterized in that: The inner heat insulation layer (4) and the upper heat insulation layer (3) are respectively one of a rock wool board, an XPS board, and an EPS board.

Images