A multi-liquid level monitoring expansion tank for pure electric / hydrogen fuel heavy trucks

Abstract

The utility model discloses a pure electric / hydrogen fuel heavy truck is with many liquid level monitoring expansion tank, solved the problem that current intelligent accurate liquid level linear identification cannot be realized, simultaneously has the liquid shortage alarm and full liquid prompt function. Including expansion tank body (1) and liquid level sensor (2), liquid level sensor (2) installs in expansion water tank body (1) bottom, goes into expansion water tank (1) inside, and the float ball (4) is sleeved on the guide rod (6) of liquid level sensor (2), and the float ball (4) is installed between the upper snap ring (3) and lower snap ring (5) of guide rod (6), can slide freely before the upper snap ring (3) and lower snap ring (5), and expansion tank body (1) is equipped with expansion tank sight glass (8), and the position of upper snap ring (3), lower snap ring (5) corresponds MAX line, MIN line of expansion tank sight glass (8) respectively. Compared with the traditional expansion tank, the utility model discloses linear many liquid level identification sensor, can real -time accurate feedback liquid level position.

Description

Technical Field

[0001] This utility model relates to a multi-level monitoring expansion tank for pure electric / hydrogen fuel cell heavy trucks, belonging to the field of new energy vehicles. Background Technology

[0002] Currently, the expansion tanks with liquid level monitoring in the thermal management systems of pure electric / hydrogen fuel cell heavy-duty trucks only report a low liquid level status, indicating a low liquid level fault when the system detects a lack of coolant. This approach cannot achieve intelligent and precise linear liquid level identification. Intelligent and precise monitoring of the liquid level in the thermal management systems of pure electric / hydrogen fuel cell heavy-duty trucks can achieve linear identification of the liquid level from 0% to 100%. This provides more accurate identification of coolant capacity. Utility Model Content

[0003] This invention provides a multi-level monitoring expansion tank for pure electric / hydrogen fuel cell heavy trucks, which solves the current problem of not being able to achieve intelligent and accurate linear identification of liquid levels, and also has low liquid alarm and full liquid indication functions.

[0004] This utility model is achieved through the following technical solution:

[0005] A multi-level monitoring expansion tank for pure electric / hydrogen fuel heavy trucks includes an expansion tank body (1) and a level sensor (2). The level sensor (2) is installed at the bottom of the expansion tank body (1) through a threaded structure, extending into the interior of the expansion tank (1). A float (4) is fitted on the guide rod (6) of the level sensor (2). The float (4) is installed between the upper retaining ring (3) and the lower retaining ring (5) of the guide rod (6) and can slide freely between the upper retaining ring (3) and the lower retaining ring (5). The expansion tank body (1) is provided with an expansion tank sight window (8). The positions of the upper retaining ring (3) and the lower retaining ring (5) correspond to the MAX line and MIN line of the expansion tank sight window (8), respectively.

[0006] Furthermore, the liquid level sensor (2) can convert the position information of the float (4) into a voltage signal, and the position of the float (4) is linearly related to the voltage.

[0007] Furthermore, the liquid level sensor (2) is equipped with a wiring harness plug-in (7). The wiring harness plug-in (7) has three pins, which are positive, negative and signal output respectively. After the positive and negative pins of the wiring harness plug-in (7) are connected to the corresponding circuit, the output signal pin outputs the voltage signal corresponding to the position of the float (4).

[0008] Furthermore, the liquid level sensor (2) is connected to the vehicle circuit, and the corresponding controller identifies the position of the coolant level.

[0009] Furthermore, the controller will issue alarms and prompts upon detecting the corresponding voltage signal.

[0010] Compared with traditional expansion tanks, this invention adds a linear multi-level identification sensor, which can provide real-time and accurate feedback on the liquid level position. Attached Figure Description

[0011] Figure 1 A schematic diagram of the structure of this utility model;

[0012] Figure 2 Schematic diagram of liquid level sensor;

[0013] Figure 3 The relationship between the float position and voltage is linear. Detailed Implementation

[0014] like Figure 1 , 2 As shown, this utility model is a multi-level monitoring expansion tank for pure electric / hydrogen fuel heavy trucks. A liquid level sensor (2) is installed at the bottom of the expansion tank body (1). A float (4) is sleeved on the guide rod (6) of the liquid level sensor (2). The float (4) is installed between the upper retaining ring (3) and the lower retaining ring (5) and can slide freely between the upper retaining ring (3) and the lower retaining ring (5) of the guide rod (6).

[0015] The level sensor (2) is installed at the bottom of the expansion tank body (1) via a threaded structure. The level sensor (2) extends into the interior of the expansion tank (1). The upper retaining ring (3) corresponds to the MAX line of the expansion tank sight window (8), and the lower retaining ring (5) corresponds to the MIN line of the expansion tank sight window (8). When the expansion tank body (1) is filled with coolant, the float (4) floats with the liquid level. When the liquid level is at the MAX line, the level sensor float (4) will float to the position corresponding to the MAX line of the expansion tank body (1). When the liquid level is at the MIN line, the level sensor float (4) is at the MIN position.

[0016] The level sensor (2) can convert the position information of the float (4) into a voltage signal. When the float (4) is at the MAX line, the voltage in the corresponding voltage curve (9) is 4.5V. When the float (4) is at the MIN line, the voltage in the corresponding voltage curve (9) is 0.5V. The position of the float (4) and the voltage have a linear relationship, such as... Figure 3 As shown.

[0017] The wiring harness plug-in (7) has three pins with functions of positive, negative, and signal output. After connecting the positive and negative pins of the wiring harness plug-in (7) to the corresponding circuit, the output signal pin outputs the voltage signal corresponding to the position of the float (4).

[0018] By connecting the liquid level sensor (2) to the vehicle circuit, the corresponding controller can identify the coolant level position and achieve accurate linear identification of the liquid level. For special liquid level positions MAX, MIN, or other defined liquid levels, the vehicle controller can monitor the corresponding voltage signal and issue an alarm, prompt, or perform other strategic actions. This achieves accurate and intelligent identification of the vehicle's coolant level.

[0019] The expansion tank incorporates a linear multi-level sensor, providing a foundation for intelligent detection of vehicle thermal management. For example, it can provide functions such as low fluid level alarms, full fluid level indications, and antifreeze volume displays.

Claims

1. A multi-level monitoring expansion tank for pure electric / hydrogen fuel cell heavy-duty trucks, characterized in that: The expansion tank body (1) and the liquid level sensor (2) are included. The liquid level sensor (2) is installed at the bottom of the expansion tank body (1) and extends into the interior of the expansion tank (1). A float (4) is fitted on the guide rod (6) of the liquid level sensor (2). The float (4) is installed between the upper retaining ring (3) and the lower retaining ring (5) of the guide rod (6) and can slide freely between the upper retaining ring (3) and the lower retaining ring (5). The expansion tank body (1) is provided with an expansion tank sight glass (8). The positions of the upper retaining ring (3) and the lower retaining ring (5) correspond to the MAX line and MIN line of the expansion tank sight glass (8) respectively.

2. The multi-level monitoring expansion tank for pure electric / hydrogen fuel cell heavy-duty trucks according to claim 1, characterized in that: The liquid level sensor (2) can convert the position information of the float (4) into a voltage signal, and the position of the float (4) is linearly related to the voltage.

3. The multi-level monitoring expansion tank for pure electric / hydrogen fuel cell heavy-duty trucks according to claim 2, characterized in that: The liquid level sensor (2) has a wiring harness plug (7). The wiring harness plug (7) has three pins, which are positive, negative and signal output respectively. After the positive and negative pins of the wiring harness plug (7) are connected to the corresponding circuit, the output signal pin outputs the voltage signal corresponding to the position of the float (4).

4. The multi-level monitoring expansion tank for pure electric / hydrogen fuel cell heavy trucks according to claim 1, characterized in that: The liquid level sensor (2) is connected to the vehicle circuit, and the corresponding controller identifies the position of the coolant level.

5. A multi-level monitoring expansion tank for pure electric / hydrogen fuel cell heavy-duty trucks according to claim 4, characterized in that: The controller will issue an alarm or prompt action after detecting the corresponding voltage signal.

6. The multi-level monitoring expansion tank for pure electric / hydrogen fuel cell heavy-duty trucks according to claim 1, characterized in that: The liquid level sensor (2) is installed at the bottom of the expansion tank body (1) via a threaded structure.

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