Module for detecting pressure difference between upper port and lower port of switch for direct-current switch

Abstract

The utility model relates to the technical field of energy storage, and discloses a module for detecting voltage difference between an upper port and a lower port of a switch for a direct current switch, which comprises a main switch group used for controlling on-off of a main current path between a battery and a mains supply side; the pre-charging switch group is connected in parallel with the main switch group and is used for pre-charging the circuit before the main switch group is closed; the main negative module is connected to the mains supply side and used for performing electric energy exchange with a load; the Hall sensor is configured on the battery side and used for detecting current information output by the battery and sending a detection result to the battery control unit; the fuse protector is connected to the negative electrode of the battery and is used for providing overcurrent protection; and the fuse heater is connected to the positive electrode of the battery and is used for providing overcurrent protection. According to the utility model, the Hall sensor and the fuse provide real-time protection and ensure the safety and stability of system operation, and finally, the voltage difference between the commercial power side and the battery side can be directly read through the main negative module, which is simpler, more convenient and more direct.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage technical field especially, relate to a module for detecting the pressure difference of the upper and lower ports of switch for DC switch. BACKGROUND

[0002] DC switch is a kind of electrical switch equipment for DC circuit, and main function is to control the on-off of DC, it is widely used in industry, electric power, rail transit, photovoltaic power generation, electric vehicle etc., to ensure the safe, stable and reliable operation of system, wherein DC switch is widely used in battery cabinet.

[0003] In the energy storage industry, before the power supply to the battery cabinet, in order to avoid the battery positive and negative pole reverse connection and other reasons to cause the pressure difference between battery side and power side to be too large in the closing moment, the voltage difference between battery side and power side needs to be judged before power supply, so as to detect.

[0004] And the traditional high-voltage box pre-charge circuit needs to collect the voltage values of power side and battery side respectively and compare the pressure difference before power supply, which needs two-way sampling port to sample and needs to compare the pressure difference again, which is relatively cumbersome, therefore a module for detecting the pressure difference of the upper and lower ports of switch for DC switch is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a module for detecting the pressure difference of the upper and lower ports of switch for DC switch, aiming at improving the problem that two-way sampling port is needed to sample and the pressure difference needs to be compared again in the prior art, which is relatively cumbersome.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A module for detecting the pressure difference of the upper and lower ports of switch for DC switch, comprising:

[0008] Main switch group, for controlling the on-off of main current path between battery and power side;

[0009] Pre-charge switch group, connected in parallel with main switch group, for pre-charging circuit before main switch group is closed;

[0010] Main negative module, connected at power side, for exchanging electric energy with load;

[0011] Hall sensor, configured at battery side, for detecting current information output by battery, and sending detection result to battery control unit;

[0012] Fuse minus, connected at negative pole of battery, for providing overcurrent protection;

[0013] Fuse plus, connected at positive pole of battery, for providing overcurrent protection;

[0014] As a further description of the above technical solutions:

[0015] The pre-charge switch group comprises a group of controllable switches for gradually increasing the current in the pre-charge stage to protect the circuit.

[0016] As a further description of the above technical solutions:

[0017] The Hall sensor is connected to the battery control unit for real-time monitoring of the working state of the battery and providing an overload protection signal to the battery control unit.

[0018] As a further description of the above technical solutions:

[0019] The fuse minus and the fuse plus can automatically disconnect the circuit under overload conditions to prevent damage to the battery and the circuit.

[0020] As a further description of the above technical solutions:

[0021] The main negative module can communicate with the battery control unit through a control signal to control the working mode of the load.

[0022] The utility model has the following beneficial effects:

[0023] In the utility model, the module reduces current impact, optimizes energy distribution, and prolongs the service life of the equipment through pre-charging, main switch control, load adjustment, and real-time monitoring. At the same time, the Hall sensor and the fuse provide real-time protection to ensure the safety and stability of the system. Finally, through the main negative module, the voltage difference between the mains side and the battery side can be directly read, which is more convenient and direct. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 A high-voltage box pre-charge circuit schematic diagram for detecting the voltage difference between the upper and lower openings of the switch for the direct current switch is provided.

[0025] Fig. 2 An electrical schematic diagram for detecting the voltage difference between the upper and lower openings of the switch for the direct current switch is provided.

[0026] Fig. 3 An electrical schematic diagram for detecting the voltage difference between the upper and lower openings of the switch for the direct current switch is provided.

[0027] LEGEND:

[0028] 1, main switch group; 2, pre-charge switch group; 3, main negative module; 4, Hall sensor; 5, fuse minus; 6, fuse plus. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0030] With reference to Figs. 1 to 3 The utility model provides an embodiment: a module for detecting the pressure difference between the upper and lower ports of a DC switch, comprising: a main switch group 1 for controlling the on-off of the main current path between the battery and the mains side, which ensures the safe switching between the battery and the mains, avoids the impact of sudden current on the system, and realizes efficient remote operation through a relay control signal, thereby improving the intelligent level of the circuit. The pre-charging switch group 2 is composed of a group of controllable switches, which is used to gradually increase the current in the pre-charging stage to protect the circuit, and is connected in parallel with the main switch group 1. The principle is to convert the high-pressure difference impact current into stable current by gradually turning on the circuit, thereby protecting the elements and prolonging the service life of the equipment, and supporting accurate current regulation.

[0031] The main negative module 3 is connected to the mains side and is used for exchanging electric energy with the load, which realizes intelligent switching of the load working mode according to the instruction of the battery control unit (BCU), optimizes the load efficiency and energy consumption, and ensures the stability and reliability of the system. The Hall sensor 4 is connected to the battery control unit (BCU) and is used for real-time monitoring of the battery working state and providing an overload protection signal. The real-time monitoring function can quickly sense abnormal current and feed back the signal to the BCU, thereby responding to the overcurrent protection quickly and ensuring the safety of the battery and the system. The fuse minus 5 and the fuse plus 6 are respectively connected to the negative and positive poles of the battery and are used for providing overcurrent protection. The two automatically disconnect the circuit under overload conditions, forming a bidirectional protection to fully ensure the safe operation of the battery and related equipment.

[0032] Before the battery cabinet is powered on, the transformer primary side of the DCDC 24V isolation circuit is supplied with +24V, so that the transformer secondary side outputs 24V voltage to the relay control pin. After the relay is attracted, the battery side and the mains side negative pole are connected, forming an equipotential basis. This design not only ensures the voltage balance of the pre-charging circuit, but also directly collects the pressure difference between the two sides, realizes high precision of data collection, and is simple and easy to operate.

[0033] Working Principle: This module ensures the safe and stable operation of the system through the coordinated work of multiple key components. Main switch group 1, as the core component of the circuit, controls the current path between the battery side and the mains power side. Under normal operation, main switch group 1 is closed, allowing the current path to conduct; in abnormal situations or during system switching, main switch group 1 is open, cutting off the main current and preventing damage to the system from current surges. This design ensures efficient circuit switching and safe system operation.

[0034] The pre-charge switch group 2 consists of a set of controllable switches. Its function is to gradually increase the current before the circuit is officially energized, thereby reducing the inrush current caused by the high voltage difference. During the pre-charge stage, the pre-charge switch group 2 gradually establishes a stable current path, thus protecting circuit components and extending the service life of the equipment. This process achieves a smooth current transition and avoids the impact of instantaneous large currents on the system.

[0035] The main-load module 3 is responsible for exchanging electrical energy between the mains power supply and the load. It receives commands from the battery control unit (BCU) via its built-in control unit to adjust the load's operating mode. The intelligent control design of the main-load module 3 effectively optimizes energy distribution, improves load efficiency, reduces energy consumption, and ensures system stability.

[0036] Hall sensor 4 is used to monitor the battery's operating status in real time. By sensing the current output from the battery and feeding it back to the battery control unit (BCU), the system can quickly respond to abnormal currents. When the current is abnormal or there is an overload, Hall sensor 4 transmits the detected signal to the BCU, triggering a protection mechanism to effectively ensure the safety of the battery and circuitry.

[0037] Fuse -5 and fuse +6 are connected to the negative and positive terminals of the battery, respectively. Their function is to quickly disconnect the circuit in the event of overcurrent or short circuit in the system, preventing further damage. When used together, these two fuses provide bidirectional protection for both the positive and negative terminals of the battery, comprehensively improving the system's safety performance.

[0038] The entire module's workflow ensures that the circuit is fully pre-charged before system operation and that the current status is monitored in real time during system operation. Through the collaboration of its components, the module not only achieves intelligent current regulation and load optimization but also responds quickly to abnormal situations, comprehensively ensuring the safety and reliability of system operation.

[0039] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A module for detecting the voltage difference between the upper and lower ports of a DC switch, characterized in that, The application relates to a battery control system, comprising: a main switch group (1) for controlling the on-off of the main current path between the battery and the mains side; a pre-charging switch group (2) connected in parallel with the main switch group (1) for pre-charging the circuit before the main switch group (1) is closed; a main negative module (3) connected to the mains side for exchanging electric energy with the load; a Hall sensor (4) arranged at the battery side for detecting the current information output by the battery and sending the detection result to a battery control unit (BCU); a fuse minus (5) connected to the negative pole of the battery for providing overcurrent protection; a fuse plus (6) connected to the positive pole of the battery for providing overcurrent protection.

2. The module for detecting the pressure difference between the upper and lower ports of a detection switch for a DC switch according to claim 1, characterized by The pre-charging switch group (2) comprises a group of controllable switches for gradually increasing the current in the pre-charging stage to protect the circuit.

3. The module for detecting the pressure difference between the upper and lower ports of a detection switch for a DC switch according to claim 1, characterized in that, The Hall sensor (4) is connected to the battery control unit (BCU) for monitoring the working state of the battery in real time and providing an overload protection signal to the battery control unit.

4. The module for detecting the pressure difference between the upper and lower ports of a detection switch for a DC switch according to claim 1, characterized in that, The fuse plus (6) and the fuse minus (5) can automatically disconnect the circuit under the overload condition to prevent the damage of the battery and the circuit.

5. The module for detecting the pressure difference between the upper and lower ports of a detection switch for a DC switch according to claim 1, characterized in that, The main negative module (3) can realize communication with the battery control unit (BCU) through a control signal to control the working mode of the load.

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