Control system of storage battery of diesel generator

Abstract

The utility model belongs to the technical field of diesel generators, and particularly discloses a control system of a diesel generator accumulator jar, which comprises a diesel generator main body, a control panel and an accumulator jar, and further comprises an electromagnetic switch device, and line structures between an armature switch and the accumulator jar and the control panel are connected in series through a connecting terminal. The connection terminal comprises a positive terminal, a negative terminal, a control terminal and an output load terminal; the control terminal is electrically connected with the wire outlet end of the control panel; the positive terminal is electrically connected with a battery pack negative electrode of the storage battery; the negative terminal is electrically connected with the positive pole of the battery pack of the accumulator jar through the tandem control panel; and the output load terminal is connected with a starting / closing circuit of the diesel generator main body. According to the utility model, a worker can control loops such as a secondary line of the accumulator jar through the control panel, manual connection / disconnection operation is not needed, and the safety of the worker is ensured while electric leakage of the accumulator jar is prevented. The utility model is suitable for controlling the diesel generator.

Description

Technical Field

[0001] This utility model belongs to the field of diesel generator technology and relates to a control system for a diesel generator battery. Background Technology

[0002] Mobile generators are widely used in various situations requiring temporary or mobile power, such as construction sites for wind power, photovoltaic power, and power transmission and transformation, as well as hospitals. They also serve as backup power in water supply systems to ensure continued power supply when the main power source is interrupted.

[0003] For example, a schematic diagram of a mobile diesel generator is shown below. Figure 1 As shown, the system includes a diesel generator body containing a generator and a diesel engine, a control box (including a control system), a battery for starting the control system and diesel engine, and auxiliary devices (fuel tank, water tank, additional movable equipment support structure, and additional batteries for power generation). Its power generation principle is that the diesel engine burns diesel fuel in the fuel tank, converting the chemical energy of the diesel into mechanical energy. The mechanical power of the diesel engine is transmitted to the rotor of the generator through an internal transmission device. When the rotor rotates, the internal stator windings of the generator cut the magnetic lines of force of the rotor's magnetic field, generating an induced electromotive force (EMF) in the stator windings. Since the stator windings are connected to an external load circuit, the induced EMF drives current to flow through the load, generating electrical energy that is stored in the batteries used for power generation, thus realizing the conversion of mechanical energy into electrical energy. Throughout the power generation process, operators adjust the engine's operating status and the generator's output voltage, frequency, and other parameters through the control panel in the control system to meet the power demands of different loads.

[0004] In actual production, after the diesel generator starts, it will automatically charge the battery pack in the storage battery. When the battery pack is fully charged, the staff will close the charging interface of the storage battery. However, because the secondary circuit of the generator (i.e., the auxiliary low-voltage circuit used for control, monitoring and signal transmission in the generator, which is different from the high-voltage primary circuit that directly transmits electrical energy) is always in an open-circuit discharge state, the storage battery will continue to discharge after the diesel generator stops. After a maintenance cycle (usually 15 days), the storage battery used for the control system and diesel engine starting will be insufficient, which will cause the generator to fail to restart.

[0005] To ensure the generator can restart next time it is used, the existing solution is to manually connect and disconnect the battery circuit before starting and after stopping the mobile diesel generator. This prevents the battery used for the control system and diesel engine starting from continuously discharging and ensures that the battery is fully charged. However, this method is complicated and cumbersome for the personnel who are connecting and disconnecting the wires. Furthermore, it is easy to come into contact with live parts when connecting or disconnecting the wires. Since the operating voltage of the generator and battery is usually high, if the personnel make a mistake, it may cause a short circuit between the positive and negative terminals, generate sparks, or even cause a fire, which poses a great safety hazard. Utility Model Content

[0006] The purpose of this invention is to provide a control system for a diesel generator battery, allowing operators to directly control the opening and closing of the secondary circuit between the battery and the main body of the diesel generator via a control panel, without the need for disconnection operations, thereby avoiding contact with live parts and ensuring safety.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A control system for a diesel generator battery includes a diesel generator body, a control panel for controlling the diesel generator body, and a battery for supplying power to the diesel generator body and the control panel during startup. The control system also includes an electromagnetic switch device, wherein the electromagnetic switch device connects its armature switch in series with the circuit of the battery and the control panel through connection terminals. The connection terminals of the electromagnetic switch device include a positive terminal, a negative terminal, a control terminal, and an output load terminal.

[0009] The control terminal of the electromagnetic switch device is electrically connected to the output terminal of the control panel;

[0010] The positive terminal of the electromagnetic switch device is electrically connected to the negative terminal of the battery pack of the storage battery;

[0011] The negative terminal of the electromagnetic switch device is electrically connected to the positive terminal of the battery pack of the storage battery via a series control panel.

[0012] The output load terminal of the electromagnetic switch device is connected to the start / stop circuit of the diesel generator body.

[0013] As a limitation, the electromagnetic switch device further includes a grounding terminal, which is connected to the grounding terminal of the diesel generator body via a grounding wire.

[0014] As a second limitation, the negative terminal of the battery pack of the storage battery is connected to the vehicle grounding line corresponding to the main body of the diesel generator.

[0015] As a further limitation, the rated power of the electromagnetic switching device is matched with the output power of the main body of the diesel generator.

[0016] As a further limitation, the control panel and the electromagnetic switch device are electrically connected by an electromagnetic interference shielded cable.

[0017] The technological advancements achieved by this invention compared to existing technologies, due to the adoption of the aforementioned technical solution, are as follows:

[0018] (1) The control system for a diesel generator battery provided by this utility model connects the diesel generator battery and the diesel generator body through an electromagnetic switch device. The control signal generated by the control panel automatically controls the opening or closing of the armature switch in the electromagnetic switch device, thereby affecting the connection and disconnection of the secondary lines of the diesel generator or control panel and the battery. This avoids the cumbersome operation of manual wiring and disconnection required by the operator in the prior art, reduces the complexity of operation, and reduces the safety hazards such as short circuits, sparks or fires that may occur when the operator touches live parts. While ensuring safety, it also effectively solves the problem of insufficient power and generator failure due to continuous discharge of the battery in the prior art.

[0019] (2) This utility model adds a grounding terminal to the electromagnetic switch device, and connects the grounding terminal to the grounding terminal of the diesel generator body through a grounding wire, or connects the grounding terminal of the vehicle body to the negative terminal of the battery pack of the storage battery. The grounding structure ensures the safety of the wiring between the diesel generator body, the control panel and the storage battery.

[0020] (3) The rated power of the electromagnetic switch device is matched with the output power of the diesel generator body to ensure that the electromagnetic switch device can withstand the load requirements of the diesel generator body during use and will not be damaged due to power mismatch.

[0021] (4) The control panel and the electromagnetic switch device of this utility model use an electromagnetic interference shielded cable for signal transmission, which effectively suppresses the influence of external electromagnetic interference on signal transmission and ensures the effectiveness of the operation of this utility model.

[0022] In summary, the electromagnetic switch device in this invention is connected in series with the circuit structure of the battery control panel and the diesel generator body, forming a circuit structure in which the secondary line between the battery and the control panel or the diesel generator body can be freely disconnected or closed. This allows the operator to control the secondary line circuit to open or close through the control panel without the need for manual disconnection or reconnection. This ensures safety while preventing the battery from continuing to discharge after the diesel engine stops.

[0023] This invention is suitable for controlling diesel generators. Attached Figure Description

[0024] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0025] In the attached diagram:

[0026] Figure 1 This is a schematic diagram of the structure of a mobile diesel generator in the prior art;

[0027] Figure 2 This is a schematic diagram of the overall module structure of Embodiment 1 of this utility model;

[0028] Explanation of reference numerals in the attached diagram: A, Output load terminal of the electromagnetic switch device; B, Control terminal of the electromagnetic switch device; C1, Positive terminal of the electromagnetic switch device; C2, Negative terminal of the electromagnetic switch device; D1, Positive terminal of the battery; D2, Negative terminal of the battery; E, Outgoing terminal of the control panel. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] Example 1: A control system for a diesel generator battery

[0031] like Figure 2 As shown, this embodiment includes a diesel generator body, a control panel for controlling the diesel generator body, an electromagnetic switch device, and a storage battery for supplying power to the diesel generator body and control panel during startup.

[0032] The electromagnetic switch device connects its armature switch in series with the circuit between the battery and the control panel via connection terminals. The connection terminals of the electromagnetic switch device include positive terminal C1, negative terminal C2, output load terminal A, and control terminal B.

[0033] Among them, the control terminal B of the electromagnetic switch device is electrically connected to the output terminal E of the control panel, the positive terminal C1 of the electromagnetic switch device is electrically connected to the negative terminal D2 of the battery pack of the storage battery, and the negative terminal C2 of the electromagnetic switch device is electrically connected to the positive terminal D1 of the battery pack of the storage battery through the control panel in series.

[0034] The output load terminal A of the electromagnetic switch device is connected to the start / stop circuit of the diesel generator body.

[0035] It should be noted that the electromagnetic switch device in this embodiment includes an electromagnetic coil, an armature switch, and switch contacts. The armature switch is attracted when the electromagnetic coil is energized, causing the switch contacts to close; when the electromagnetic coil is de-energized, it is released, causing the switch contacts to open. In this embodiment, the contact material of the electromagnetic switch device is made of high-quality conductive materials such as silver alloy. The electromagnetic switch device is equipped with overload protection devices (such as thermal relays) and short-circuit protection devices (such as fast-acting fuses).

[0036] Furthermore, to ensure the safety of the wiring between the diesel generator body, control panel, and battery, grounding is required. This embodiment provides the following two grounding structures:

[0037] The first grounding structure has an electromagnetic switch device with a grounding terminal, which is connected to the grounding terminal of the diesel generator body via a grounding wire.

[0038] In this embodiment, the grounding terminal of the electromagnetic switch device is connected to the grounding terminal of the diesel generator body (e.g., the generator's metal casing or a dedicated grounding stake) via a grounding wire, thus connecting to the earth. This ensures that the electromagnetic switch and the generator body are at the same reference potential, preventing electric shock if personnel accidentally touch the casing.

[0039] The second grounding structure connects the negative terminal D2 of the battery pack to the grounding line of the vehicle body corresponding to the main body of the diesel generator.

[0040] It should be noted that vehicle body grounding refers to a conductive structure in industrial equipment (such as diesel generators) and vehicle electrical systems, serving as a common reference point for the overall current loop of the industrial equipment or vehicle electrical system (e.g., it can be used as a unified grounding point to connect to the ground wire). Utilizing vehicle body grounding as a negative conductor reduces the need to lay separate negative lines for each local device.

[0041] In this embodiment, the negative terminal of the battery is connected to the vehicle body ground. Essentially, this allows the current to quickly reach the ground wire through the vehicle body ground when a fault occurs in the secondary circuit of the battery, thereby protecting the safety of equipment and personnel.

[0042] To further improve this embodiment, the rated power of the electromagnetic switch device is matched with the output power of the diesel generator body.

[0043] In practical applications, it is necessary to evaluate the output power of the diesel generator, such as the power range under different operating conditions (full load, overload, light load, etc.), and select the rated power of the electromagnetic switch based on this power range. This ensures the switch can stably carry the generator's output current, avoiding overload damage or malfunction due to power mismatch.

[0044] In this embodiment, the control panel and the electromagnetic switch device are electrically connected using an electromagnetic interference shielded cable.

[0045] In practical applications, the main body of the diesel generator may generate harmonics. Therefore, it is necessary to select an electromagnetic switch device with corresponding anti-interference capabilities or adaptability to ensure that the electromagnetic switch device works reliably in complex electrical environments.

[0046] In this embodiment, the housing of the electromagnetic switch device is made of corrosion-resistant material; the surface of the housing is coated with a protective coating, and a sealing ring is provided at the connection of the housing. This design allows the diesel generator to be used in more scenarios. For example, when the diesel generator is used in harsh environmental conditions (such as high temperature, high humidity, dust, corrosive gases, etc.), the electromagnetic switch device in this embodiment has a better protection level and environmental resistance, improving the reliability and service life of the electromagnetic switch device in harsh environments.

[0047] Working principle: (1) Battery circuit closing process: After the operator starts the diesel generator body through the start button on the control panel, the start signal connects the charging circuit, the electromagnetic coil is energized, the contacts are closed, the battery is connected to the secondary circuit of the diesel generator body, and the battery provides working current to the engine in the diesel generator body;

[0048] (2) Battery circuit disconnection process: The operator sends a stop signal through the stop button on the control panel to stop the diesel generator. The coil of the electromagnetic switch device is de-energized, the magnetic field disappears, the contacts are disconnected, and the battery is disconnected from the secondary circuit of the diesel generator.

[0049] When the electromagnetic switch is in the off state, the battery is completely isolated from the external circuit (such as the secondary circuit of the diesel generator). The battery will no longer discharge to the external secondary circuit. Therefore, the battery can avoid excessive discharge during standby without the need for staff to disconnect the wires, thus extending the battery's service life and ensuring that the diesel generator can start normally.

[0050] Furthermore, in this embodiment, the control panel of the diesel generator battery control system is not only used to control the battery, but can also control other operating parameters and operating condition settings of the diesel generator body through other control lines.

Claims

1. A control system for a diesel generator battery, comprising a diesel generator body, a control panel for controlling the diesel generator body, and a battery for supplying power to the diesel generator body and control panel during startup, characterized in that, The control system also includes an electromagnetic switch device, which connects its armature switch in series with the circuit of the storage battery and the control panel through a connection terminal. The connection terminal of the electromagnetic switch device includes a positive terminal, a negative terminal, a control terminal, and an output load terminal. The control terminal of the electromagnetic switch device is electrically connected to the output terminal of the control panel; The positive terminal of the electromagnetic switch device is electrically connected to the negative terminal of the battery pack of the storage battery; The negative terminal of the electromagnetic switch device is electrically connected to the positive terminal of the battery pack of the storage battery via a series control panel. The output load terminal of the electromagnetic switch device is connected to the start / stop circuit of the diesel generator body.

2. The control system for a diesel generator battery according to claim 1, characterized in that, The electromagnetic switch device also includes a grounding terminal, which is connected to the grounding terminal of the diesel generator body via a grounding wire.

3. The control system for a diesel generator battery according to claim 1, characterized in that, The negative terminal of the battery pack is connected to the vehicle grounding line corresponding to the main body of the diesel generator.

4. A control system for a diesel generator battery according to any one of claims 1-3, characterized in that, The rated power of the electromagnetic switch device is matched with the output power of the diesel generator body.

5. A control system for a diesel generator battery according to any one of claims 1-3, characterized in that, The control panel and the electromagnetic switch device are electrically connected by an electromagnetic interference shielded cable.

6. The control system for a diesel generator battery according to claim 4, characterized in that, The control panel and the electromagnetic switch device are electrically connected by an electromagnetic interference shielded cable.

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