Commercial vehicle low-voltage storage battery system and commercial vehicle

Abstract

The utility model discloses a commercial vehicle low-voltage storage battery system and a commercial vehicle. The commercial vehicle low-voltage storage battery system comprises a 24V low-voltage storage battery pack formed by two 12V storage batteries which are connected in series through a wire; the positive electrode of a first storage battery of the low-voltage storage battery pack is connected with a DCDC power supply, and the negative electrode of a second storage battery is connected with the vehicle body ground; positive electrodes of the first storage battery and the second storage battery are connected with the vehicle body control module through respective fuse boxes, so that voltage acquisition is performed on the first storage battery and / or the second storage battery through the vehicle body control module; the positive electrode of the second storage battery is further connected with an electromagnetic main switch through a fuse box, the electromagnetic main switch is connected with the 12V load and the vehicle body control module, and the vehicle body control module controls the on or off state of the electromagnetic main switch so as to supply power to the 12V load. According to the utility model, through simple circuit connection, detection of a low-voltage storage battery pack and a single storage battery is realized, alarm is given in time, and timely maintenance of the storage batteries is ensured.

Description

Technical Field

[0001] This utility model relates to the field of new energy electric vehicle technology, specifically, a low-voltage battery system for commercial vehicles and a commercial vehicle. Background Technology

[0002] Currently, commercial vehicles generally use a 24V low-voltage system, consisting of two 12V lead-acid batteries connected in series. Since vehicles are powered by 24V, but often require 12V power for specific needs, the two batteries are frequently used by connecting a single wire between them. Using only one battery in this way will cause that battery to become depleted, resulting in the battery pack malfunctioning. Utility Model Content

[0003] To address the aforementioned technical problems, the purpose of this utility model is to provide a low-voltage battery system for commercial vehicles and a commercial vehicle, which can collect voltage data from the first battery and / or the second battery through the vehicle body control module, determine whether a single battery is low on power, and provide timely warnings to ensure reliable power supply to the batteries.

[0004] The present invention solves the above problems through the following technical solution:

[0005] A low-voltage battery system for commercial vehicles includes: two 12V batteries connected in series via wires to form a 24V low-voltage battery pack; the positive terminal of the first battery in the low-voltage battery pack is connected to a DC-DC power supply, and the negative terminal of the second battery is connected to the vehicle ground; the positive terminals of both the first and second batteries are connected to a vehicle control module via their respective fuse boxes, so that the vehicle control module can collect voltage data from the first and / or second batteries; and the positive terminal of the second battery is also connected to an electromagnetic master switch via a fuse box, the electromagnetic master switch being connected to a 12V load and the vehicle control module, the vehicle control module controlling the closed or open state of the electromagnetic master switch to supply power to the 12V load.

[0006] As a further improvement of this utility model, the vehicle body control module is connected to an external temperature sensor via a wire to collect the external ambient temperature in real time.

[0007] As a further improvement of this utility model, the vehicle body control module is connected to a T-BOX to provide a low-voltage battery pack low-power alarm reminder when the vehicle is in a dormant state.

[0008] As a further improvement of this utility model, the vehicle body control module is also connected to the cockpit control module to provide a low-voltage battery pack low-power alarm reminder through the cockpit control module.

[0009] As a further improvement of this utility model, the body control module and the cockpit control module are connected by a hard wire.

[0010] As a further improvement of this utility model, the DC-DC power supply is also directly connected to the vehicle body control module.

[0011] Meanwhile, the present invention also solves the above problems through the following technical solution: a commercial vehicle, including the commercial vehicle low-voltage battery system as described above.

[0012] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0013] This invention, through simple circuit connections and optimization of existing vehicle modules, enables the detection and timely alarm of low-voltage battery packs and individual batteries, ensuring timely battery maintenance. Furthermore, it can intelligently output a 12V voltage, facilitating flexible user operation and ease of implementation. Attached Figure Description

[0014] Figure 1 This is a circuit diagram of a low-voltage battery system for commercial vehicles according to this utility model;

[0015] Figure 2 This is a schematic diagram of the connection structure of the fuse box of this utility model installed on the storage battery. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example:

[0018] Combined with appendix Figure 1 As shown, a low-voltage battery system for commercial vehicles includes: two 12V batteries connected in series via wires to form a 24V low-voltage battery pack; the positive terminal of the first battery in the low-voltage battery pack is connected to a DC-DC power supply, and the negative terminal of the second battery is connected to the vehicle ground; the positive terminals of both the first and second batteries are connected to the vehicle control module through their respective fuse boxes, and the positive terminal of the second battery is also connected to an electromagnetic master switch through the fuse box, and the electromagnetic master switch is connected to a 12V load and the vehicle control module respectively, so that the vehicle control module can control the closed or open state of the electromagnetic master switch to realize the power supply to the 12V load.

[0019] In one specific design, two 12V batteries are connected in series. The positive terminal voltage of the first battery is 24V, and the positive terminal voltage of the second battery is 12V. A lead from the positive terminal of the second battery passes through fuse box I and is connected to the vehicle control module to collect voltage data. The positive terminal voltage of the first battery can be obtained from the power supply of the vehicle control module itself, i.e., the DC-DC power supply. By simply collecting the voltages from the two positive terminals, the system determines whether the second battery is low on power and whether an alarm is needed. Simultaneously, an electromagnetic master switch is connected to the positive terminal of the second battery via fuse box II. This master switch is controlled by the vehicle control module to open or close, allowing 12V power to be output for specific 12V loads.

[0020] It should be noted that the DC-DC power supply provides power to the vehicle's low-voltage electrical loads and the battery, and is connected to the vehicle control module.

[0021] Figure 2 This is a schematic diagram of the connection structure of the fuse box of this utility model installed on the battery. The connection structure of installing the fuse box on one battery is the existing connection structure. This application only installs the fuse box on two 12V batteries connected in series. Therefore, this installation structure will not be described.

[0022] As a preferred option, the vehicle control module is also connected to an external temperature sensor via wires to collect the ambient temperature in real time.

[0023] In an even better configuration, the vehicle control module is also connected to a T-BOX to send alarm signals to the T-BOX and to the mobile phone user, reminding the user that the low-voltage battery pack may be at risk of being depleted and to perform timely maintenance and inspection.

[0024] The body control module can also be connected to the cockpit control module to provide alarm alerts via the cockpit control module.

[0025] In one specific embodiment, the vehicle body control module can intelligently collect the positive terminal voltages of the first and second batteries;

[0026] Scenario 1: When the vehicle is powered on, the DC-DC power supply outputs power normally. The body control module collects the terminal voltage of the second battery and combines it with the external ambient temperature collected by the external temperature sensor. If the external ambient temperature is lower than the set threshold, it is determined that the second battery is low on power and an alarm message is sent to the cockpit control module to trigger an alarm.

[0027] Scenario 2: With the vehicle in sleep mode, the body control module periodically wakes up to detect the voltages of the first and second batteries. Combined with the ambient temperature, when the voltage of the first battery falls below a threshold, the body control module sends an alarm message to the T-BOX and also to the mobile phone user, alerting them to a potential battery drain risk and prompting timely maintenance and inspection. When the voltage of the second battery falls below the threshold, the body control module sends a single battery drain risk warning, reminding the user to inspect and repair that individual battery.

[0028] When a user needs 12V power, they can press the 12V power access button via the soft switch on the cockpit control module's large screen. Upon receiving the request, the body control module checks if the DC-DC power supply is operational. If it is, it closes the main electromagnetic switch, allowing the 12V power circuit to output. This output interface is located in a convenient power source on the vehicle, providing a unified output for the user to connect and use. An indicator light illuminates to indicate that 12V power is available. If the DC-DC power supply is not operational, the body control module requests it to operate, ensuring that the single battery does not directly supply power and preventing battery depletion caused by continuous use without DC-DC charging.

[0029] The electromagnetic main switch can be used to connect many 12V modules or loads.

[0030] A DC-DC power supply is a type of power electronic device primarily used to convert the DC power from a car battery into the DC power required by other loads.

[0031] This invention, through simple circuit connections and optimization of existing vehicle modules, enables low-voltage battery pack and individual battery detection, providing timely alarms and ensuring prompt battery maintenance. Furthermore, it can intelligently output a 12V voltage, offering user-friendly flexibility and ease of implementation.

[0032] Although the present invention has been described herein with reference to illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention, and the implementation of the present invention is not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and implementations, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A low-voltage battery system for commercial vehicles, characterized in that, include: Two 12V batteries connected in series by wires form a 24V low-voltage battery pack. The positive terminal of the first battery in this low-voltage battery pack is connected to a DC-DC power supply, and the negative terminal of the second battery is connected to the vehicle ground. The positive terminals of both the first and second batteries are connected to the vehicle control module through their respective fuse boxes, so that the vehicle control module can collect voltage data from the first and / or second batteries. The positive terminal of the second battery is also connected to an electromagnetic master switch through a fuse box. The electromagnetic master switch is connected to both the 12V load and the vehicle control module. The vehicle control module controls the opening and closing of the electromagnetic master switch to supply power to the 12V load.

2. The commercial vehicle low-voltage battery system according to claim 1, characterized in that, The vehicle body control module is connected to an external temperature sensor via wires to collect the ambient temperature in real time.

3. The commercial vehicle low-voltage battery system according to claim 1, characterized in that, The vehicle body control module is connected to a T-BOX to provide a low-voltage battery pack low-power alarm when the vehicle is in a dormant state.

4. The commercial vehicle low-voltage battery system according to claim 1, characterized in that, The vehicle body control module is also connected to the cockpit control module, which provides low-voltage battery pack low-power alarm reminders.

5. The commercial vehicle low-voltage battery system according to claim 4, characterized in that, The body control module and the cockpit control module are connected by hard wiring.

6. The commercial vehicle low-voltage battery system according to claim 1, characterized in that, The DC-DC power supply is also directly connected to the vehicle body control module.

7. A commercial vehicle, characterized in that, Including a commercial vehicle low-voltage battery system as described in any one of claims 1-6.

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