An explosion-proof AGV composite system using dual battery packs

Abstract

The present invention provides an explosion-proof AGV composite system using a dual battery pack, the composite system comprising a main battery power supply circuit system, a secondary battery power supply circuit system and a secondary battery charging system; when a positive pressure system is established in the main battery power supply circuit system, a positive pressure control unit U3 controls a main circuit contactor KM1 to be turned on, and the main battery BAT1 provides power to the main control unit U2 and the equipment circuit unit U1; when the power supply voltage of the secondary battery BAT2 of the secondary battery power supply circuit system meets the composite system requirements, the positive pressure system is established, and the positive pressure control unit U3 controls the main circuit contactor KM1 to be turned on; the secondary battery charging system connects the positive pressure control unit U3 with the main battery BAT1 and the secondary battery BAT2, reads battery parameters, and when the secondary battery BAT2 is lower than a set value, the voltage of the secondary battery BAT2 is lower than the voltage of the main battery BAT1, and the positive pressure control unit U3 controls the positive pressure system circuit contactor KM2 to be turned on, connecting the main battery BAT1 and the secondary battery BAT2, so that the main battery BAT1 charges the secondary battery BAT2.

Description

Technical Field

[0001] The present invention belongs to the technical field of explosion-proof AGVs, and in particular relates to an explosion-proof AGV composite system using dual battery packs. Background Art

[0002] Currently, common explosion-proof AGVs are of two types: flameproof and positive pressure. The solution for explosion-proof AGVs is to place the electrical equipment in a flameproof explosion-proof box, increase the shell strength and connections to meet the explosion-proof standard requirements for use in explosive environments; the solution for positive pressure AGVs is to place the electrical equipment in a positive pressure protection system, and establish a positive pressure system with an installation device to meet the requirements for use in explosive environments. However, the current technical solutions have the following defects. The solution for explosion-proof AGVs requires that the electrical equipment be placed in a flameproof explosion-proof box. Due to technical requirements, the mass and volume of the flameproof explosion-proof box are larger than those of the positive pressure explosion-proof box. Due to the excessive mass and volume, the AGV design needs to consider more space and carrying capacity, making the flameproof AGV larger in size. The solution for positive pressure AGVs requires starting the AGV in a non-explosion-proof environment, which is inconvenient to use. Summary of the Invention

[0003] The present invention provides an explosion-proof AGV composite system using dual battery packs, wherein the composite system comprises a main battery power supply circuit system, a secondary battery power supply circuit system and a secondary battery charging system;

[0004] When the positive pressure system is established, the positive pressure control unit U3 controls the main circuit contactor KM1 to be turned on, and the main battery BAT1 provides power to the main control unit U2 and the equipment circuit unit U1;

[0005] The auxiliary battery power supply circuit system, when the supply voltage of the auxiliary battery BAT2 meets the composite system, the positive pressure system is established, the positive pressure control unit U3 controls the main circuit contactor KM1 to be turned on, and monitors the composite system parameters in real time. When the settings are not met, the main circuit contactor KM1 is cut off, and the positive pressure system is re-established according to the pressure flow and temperature parameters;

[0006] The secondary battery charging system connects the positive pressure control unit U3 to the main battery BAT1 and the secondary battery BAT2, reads the battery parameters, and when the secondary battery BAT2 is lower than the set value, the voltage of the secondary battery BAT2 is lower than the voltage of the main battery BAT1. The positive pressure control unit U3 controls the positive pressure system circuit contactor KM2 to turn on, connecting the main battery BAT1 and the secondary battery BAT2, so that the main battery BAT1 charges the secondary battery BAT2.

[0007] Furthermore, the main battery power supply circuit system is composed of a main battery BAT1, a main battery charging contactor KM3, a main battery charging socket XS1, a main battery manual charging socket XS2, a total load switch QL1, a main circuit breaker QF1, a main circuit contactor KM1, a positive pressure system circuit contactor KM2, a main control system circuit breaker QF3, a main control system rectifier device V1, a main control unit U2, a circuit breaker QF4, an equipment circuit unit U1, a positive pressure control circuit breaker QF2, a positive pressure gas supply circuit breaker QF5, a positive pressure control circuit rectifier device V2, a positive pressure gas supply circuit unit U4, a positive pressure control unit U3, a temperature sensor S1, a flow sensor S2, a pressure sensor S3 and a positive pressure control unit U3.

[0008] Furthermore, the auxiliary battery power supply circuit system is composed of an auxiliary battery BAT2, an auxiliary battery manual charging socket XS3, a total load switch QL1, a main circuit breaker QF1, a positive pressure gas supply circuit breaker QF5, a positive pressure control circuit breaker QF2, a positive pressure gas supply circuit unit U4, a positive pressure control circuit rectifier V2, a positive pressure control unit U3, a temperature sensor S1, a flow sensor S2, a pressure sensor S3, a positive pressure control unit U3 and a main circuit contactor KM1.

[0009] Furthermore, the auxiliary battery charging system is composed of a main battery BAT1, an auxiliary battery BAT2, a total load switch QL1, a main circuit breaker QF1, a positive pressure system circuit contactor KM2, a positive pressure gas supply circuit breaker QF5, a positive pressure gas supply circuit unit U4, a positive pressure control circuit breaker QF2, a positive pressure control circuit rectifier V2 and a positive pressure control unit U3.

[0010] Furthermore, the main battery BAT1 includes three two-wire connection ports, which are respectively connected to the main battery charging contactor KM3, the main battery manual charging socket XS2 and the main load switch QL1 for manual operation;

[0011] The main battery BAT1 is connected to the main circuit contactor KM1 and the positive pressure system circuit contactor KM2 via the main load switch QL1 and the main circuit breaker QF1 respectively;

[0012] One end of the main circuit contactor KM1 is connected through the main control system circuit breaker QF3, the main control system rectifier device V1, and the main control unit U2; the other end of the main circuit contactor KM1 is connected to the equipment circuit unit U1;

[0013] One end of the positive pressure system circuit contactor KM2 is connected through the positive pressure control circuit breaker QF2, the positive pressure control circuit rectifier V2 and the positive pressure control unit U3; the other end of the positive pressure system circuit contactor KM2 is connected to the positive pressure gas supply circuit unit U4 through the positive pressure gas supply circuit breaker QF5;

[0014] The positive pressure control unit U3 is connected to the temperature sensor S1, flow sensor S2 and pressure sensor S3 respectively;

[0015] The main battery charging contactor KM3 is connected to the main battery charging socket XS1.

[0016] Furthermore, the auxiliary battery BAT2 includes two two-wire interfaces, which are respectively connected to the auxiliary battery manual charging socket XS3 and the main load switch QL1;

[0017] One end of the main circuit breaker QF1 is connected to the positive pressure gas supply circuit breaker QF5 and the positive pressure gas supply circuit unit U4; the other end of the main circuit breaker QF1 is connected to the positive pressure control circuit breaker QF2, the positive pressure control circuit rectifier V2 and the positive pressure control unit U3, and the positive pressure control unit U3 is respectively connected to the temperature sensor S1, flow sensor S2 and pressure sensor S3.

[0018] Furthermore, the main battery BAT1 and the auxiliary battery BAT2 are connected to the total load switch QL1 and the main circuit breaker QF1 in sequence respectively; the main battery BAT1 is connected to the positive pressure gas supply circuit unit U4 through the total load switch QL1, the main circuit breaker QF1, the positive pressure system circuit contactor KM2, and the positive pressure gas supply circuit breaker QF5; the main battery BAT1 is connected to the total load switch QL1, the main circuit breaker QF1, the positive pressure control circuit breaker QF2, the positive pressure control circuit rectifier V2 and the positive pressure control unit U3 in sequence.

[0019] Furthermore, the main battery BAT1 is connected to the main circuit breaker QF1 via the first two channels of the main load switch QL1;

[0020] The first two channels of the main circuit breaker QF1 are connected to the main circuit contactor KM1 and the positive pressure system circuit contactor KM2 respectively;

[0021] One end of the main circuit contactor KM1 is connected to the inlet of the main control system rectifier device V1 through the protection device main control system circuit breaker QF3, and the outlet of the main control system rectifier device V1 is connected to the main control unit U2 to provide power to the main control unit U2; the other end of the main circuit contactor KM1 is connected to the equipment circuit unit U1 through the circuit breaker QF4 to provide power to it;

[0022] The positive pressure system circuit contactor KM2 is connected to the positive pressure control circuit rectifier V2 and the positive pressure supply circuit unit U4 through the positive pressure control circuit breaker QF2 and the positive pressure supply circuit breaker QF5 respectively. The outlet of the positive pressure control circuit rectifier V2 is connected to the positive pressure control unit U3 to provide power for it;

[0023] The temperature sensor S1, flow sensor S2, and pressure sensor S3 are respectively connected to the signal input terminals of the positive pressure control unit U3;

[0024] After the positive pressure system is established, the positive pressure control unit U3 controls the main circuit contactor KM1 to be turned on, and the main battery BAT1 provides power to the main control unit U2 and the equipment circuit unit U1.

[0025] Furthermore, the auxiliary battery BAT2 includes two two-wire interfaces, which are respectively connected to the auxiliary battery manual charging socket XS3 and the rear two channels of the total load switch QL1;

[0026] The main load switch QL1 passes through the positive pressure gas supply circuit breaker QF5 and the positive pressure control circuit breaker QF2 through the two channels after the main circuit breaker QF1. The positive pressure gas supply circuit breaker QF5 is connected to the positive pressure gas supply circuit unit U4 as a power source.

[0027] The positive pressure control circuit breaker QF2 is connected to the positive pressure control circuit rectifier V2, and the outlet of the positive pressure control circuit rectifier V2 is connected to the positive pressure control unit U3 to provide power for it;

[0028] The temperature sensor S1, flow sensor S2, and pressure sensor S3 are respectively connected to the signal input terminals of the positive pressure control unit U3;

[0029] When the power supply voltage of the auxiliary battery BAT2 meets the requirements of the composite system, the positive pressure control unit U3 performs a purge operation according to the preset logic, pressure flow and temperature parameters. After the purge is completed, the intake volume is reduced and the positive pressure system is established. The positive pressure control unit U3 controls the main circuit contactor KM1 to be turned on and monitors the composite system parameters in real time. When the settings are not met, the main circuit contactor KM1 is cut off and the positive pressure system is re-established according to the pressure flow and temperature parameters.

[0030] Furthermore, the two-line power output of the main battery BAT1 and the auxiliary battery BAT2 passes through the first two channels and the last two channels of the main load switch QL1 and the main circuit breaker QF1 respectively;

[0031] The main battery BAT1 is connected to the positive pressure gas supply circuit unit U4 through the positive pressure system circuit contactor KM2 and the positive pressure gas supply circuit breaker QF5;

[0032] The main battery BAT1 is connected to the positive pressure control circuit rectifier V2 through the positive pressure control circuit breaker QF2 to provide power to the positive pressure control unit U3;

[0033] The positive pressure control unit U3 is connected to the main battery BAT1 and the auxiliary battery BAT2 through a communication line to read the battery parameters. When the auxiliary battery BAT2 is lower than the set value, the voltage of the auxiliary battery BAT2 is lower than the voltage of the main battery BAT1. The positive pressure control unit U3 controls the positive pressure system loop contactor KM2 to connect, connecting the two batteries, so that the main battery BAT1 charges the auxiliary battery BAT2. When the power meets the requirements, the positive pressure system loop contactor KM2 is disconnected to end charging. When the power of the two batteries is lower than the set value, the composite system prompts charging and manually or automatically charges the main battery BAT1 according to demand. When a fault occurs and both the main battery BAT1 and the auxiliary battery BAT2 cannot be charged normally, manual charging is performed by human intervention.

[0034] Beneficial effects:

[0035] This invention utilizes a dual-battery explosion-proof AGV composite system to address the issues of excessive mass and volume associated with explosion-proof AGVs and the inconvenience of positive-pressure AGVs. This solution allows for manual or automatic charging of the main battery BAT1 as needed, ensuring the immediate start-up of the explosion-proof AGV while reducing mass and volume compared to explosion-proof AGVs. It also offers greater ease of use compared to positive-pressure AGVs.

[0036] The present invention uses flameproof batteries on explosion-proof AGVs to maintain a positive pressure system, and places a main battery in the positive pressure system; after the positive pressure system is established, the main battery can be used to charge the auxiliary battery.

[0037] Compared to flameproof AGVs, this system significantly reduces weight and size, facilitating miniaturization. Compared to positive-pressure AGVs, this system offers the advantages of flexibility and ready restart after shutdown. In explosive environments, the system can be re-established through purging and monitoring of temperature, flow, and pressure parameters. The primary battery charges the secondary battery, ensuring sufficient charge to maintain the positive pressure system, avoiding repeated charging that reduces efficiency.

[0038] It should be understood that the above general description and the following detailed description are only exemplary and illustrative and do not limit the scope of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 2. A schematic circuit diagram of a main battery power supply circuit system in an explosion-proof AGV composite system using dual battery packs according to the present invention;

[0040] Figure 2 2. A schematic circuit diagram of a secondary battery power supply circuit system in an explosion-proof AGV composite system using dual battery packs according to the present invention;

[0041] Figure 3Schematic diagram of a circuit of a secondary battery charging system in an explosion-proof AGV composite system using dual battery packs according to the present invention;

[0042] In the figure, BAT1-main battery, BAT2-slave battery, QL1-total load switch, QF1-main circuit breaker, QF2-positive pressure control circuit breaker, QF3-main control system circuit breaker, QF4-circuit breaker, QF5-positive pressure gas supply circuit breaker, KM1-main circuit contactor, KM2-positive pressure system circuit contactor, KM3-main battery charging contactor, XS1-main battery charging socket, XS2-main battery manual charging socket, XS3-slave battery manual charging socket, V1-main control system rectifier, V2-positive pressure control circuit rectifier, U1-equipment circuit unit, U2-main control unit, U3-positive pressure control unit, U4-positive pressure gas supply circuit unit, S1-temperature sensor, S2-flow sensor, S3-pressure sensor;

[0043] It should be understood that the drawings are not necessarily drawn to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the present disclosure. The specific design features of the present invention as disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes will be determined in part by the particular intended application and use environment.

[0044] In the drawings, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. DETAILED DESCRIPTION

[0045] Reference will now be made in detail to various embodiments of the present invention, examples of which are illustrated in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments of the present invention, it should be understood that this description is not intended to limit the present invention to those exemplary embodiments. On the other hand, the present invention is intended to cover not only the exemplary embodiments of the present invention, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the present invention as defined by the appended claims.

[0046] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The specific structures and functions described in the exemplary embodiments of the present invention are for illustrative purposes only. The embodiments according to the concepts of the present invention may be implemented in various forms, and it should be understood that they should not be interpreted as being limited to the exemplary embodiments described in the exemplary embodiments, but include all modifications, equivalents or alternatives included in the spirit and scope of the present invention.

[0047] Throughout the specification, the technical terms used herein are for the purpose of describing various exemplary embodiments only and are not intended to be limiting. It will be further understood that the terms "comprises," "comprising," "having," etc., when used in exemplary embodiments, specifically refer to the presence of the stated parts, steps, operations, or elements, but do not preclude the presence or addition of one or more other parts, steps, operations, or elements.

[0048] The present invention provides an explosion-proof AGV composite system using a dual battery pack, the composite system comprising a main battery power supply circuit system, a secondary battery power supply circuit system and a secondary battery charging system;

[0049] like Figure 1 As shown, the main battery power supply circuit system consists of a main battery BAT1, a main battery charging contactor KM3, a main battery charging socket XS1, a main battery manual charging socket XS2, a total load switch QL1, a main circuit breaker QF1, a main circuit contactor KM1, a positive pressure system circuit contactor KM2, a main control system circuit breaker QF3, a main control system rectifier device V1, a main control unit U2, a circuit breaker QF4, an equipment circuit unit U1, a positive pressure control circuit breaker QF2, a positive pressure gas supply circuit breaker QF5, a positive pressure control circuit rectifier device V2, a positive pressure gas supply circuit unit U4, a positive pressure control unit U3, a temperature sensor S1, a flow sensor S2, a pressure sensor S3 and a positive pressure control unit U3.

[0050] The main battery BAT1, with a larger capacity than the secondary battery BAT2, can sustain several hours of operation for the composite system. Once the positive pressure system is established, the main battery BAT1 meets activation requirements, and the positive pressure control unit U3 closes the main circuit contactor KM1. The main load switch QL1, located outside the equipment, allows for manual disconnection, ensuring power is disconnected during maintenance or when a fault light is on, preventing explosions and potential damage to personnel and equipment.

[0051] The main circuit breaker QF1, the main control system circuit breaker QF3, and the loop circuit breaker QF4 provide overvoltage, overload, and short-circuit protection for the main circuit, the equipment loop unit U1, and the main control unit U2, respectively. When a fault occurs in the upstream or downstream equipment, the power supply circuit can be automatically cut off to avoid further damage to the equipment.

[0052] The main control system's rectifier device V1 provides a DC voltage source for the main control unit U2. Main control unit U2 establishes communication and data exchange with the main battery BAT1, monitoring various main battery data in real time. When the battery charge level drops, the explosion-proof AGV can execute a program and issue a low-battery warning. It can then autonomously drive to a charging station for charging in a non-explosive environment. When the explosion-proof AGV approaches the charging station, it exchanges signals with the station, connecting the main battery charging socket XS1. When the set conditions are met, the main control system controls the main battery charging contactor KM3 to close and initiate charging. The device must remain powered on during charging. When the battery level reaches the set value, charging stops and the main battery charging socket XS1 disconnects from the charging station. The device circuit unit U1 is the device's primary functional module, responsible for the operation of the explosion-proof AGV and robotic arm. The main control unit U2 includes the AGV and robotic arm's control components, sensors, and communication functions.

[0053] like Figure 2 As shown, the auxiliary battery power supply circuit system consists of an auxiliary battery BAT2, an auxiliary battery manual charging socket XS3, a total load switch QL1, a main circuit breaker QF1, a positive pressure gas supply circuit breaker QF5, a positive pressure control circuit breaker QF2, a positive pressure gas supply circuit unit U4, a positive pressure control circuit rectifier V2, a positive pressure control unit U3, a temperature sensor S1, a flow sensor S2, a pressure sensor S3, a positive pressure control unit U3 and a main circuit contactor KM1.

[0054] Among them, the auxiliary battery BAT2 directly provides power for the positive pressure control unit U3 and the positive pressure air supply circuit unit U4, the positive pressure control circuit contactor V2 provides a DC voltage source for the positive pressure control unit U3, the positive pressure control circuit circuit breaker QF2 and the positive pressure air supply circuit circuit breaker QF5 provide overvoltage, overload and short circuit protection for the positive pressure control unit U3 and the positive pressure air supply circuit unit U4 respectively, the temperature sensor S1 monitors the intake temperature of the air inlet, the flow sensor S2 serves as a sensor at the exhaust hole to monitor the flow, and the pressure sensor S3 is safely installed on the outer wall and is connected to the controller of the positive pressure control circuit through a safety barrier.

[0055] like Figure 3 As shown, the auxiliary battery charging system is composed of a main battery BAT1, an auxiliary battery BAT2, a total load switch QL1, a main circuit breaker QF1, a positive pressure system circuit contactor KM2, a positive pressure gas supply circuit breaker QF5, a positive pressure gas supply circuit unit U4, a positive pressure control circuit breaker QF2, a positive pressure control circuit rectifier V2 and a positive pressure control unit U3.

[0056] The main battery BAT1 can provide a charging function for the secondary battery BAT2, and the battery can be connected through the positive pressure system loop contactor KM2.

[0057] In the above technical solution, the main battery power supply circuit system includes a main battery BAT1, and the main battery BAT1 has three two-wire connection ports, which are respectively connected to the main battery charging socket XS1, the main battery manual charging socket XS2, and the manual operation device total load switch QL1 through the main battery charging contactor KM3, and are connected to the protection device main circuit breaker QF1 through the first two channels of the total load switch QL1. After passing through the first two channels of the protection device main circuit breaker QF1, they are respectively connected to the main circuit contactor KM1 and the positive pressure system circuit contactor KM2, and then through the main circuit contactor KM1 and the protection device main control system. Circuit breaker QF3 is connected to the inlet of the main control system rectifier V1, providing power to the main control unit U2. The outlet of the main control system rectifier V1 is connected to the main control unit U2. The other end of the main circuit contactor KM1 is connected to the equipment circuit unit U1 via circuit breaker QF4, providing power to it. The positive pressure system circuit contactor KM2 is connected to the positive pressure control circuit rectifier V2 and the positive pressure gas supply circuit unit U4 via positive pressure control circuit breaker QF2 and positive pressure gas supply circuit breaker QF5, respectively. The outlet of the positive pressure control circuit rectifier V2 is connected to the positive pressure control unit U3, providing power to it. Temperature sensor S1, flow sensor S2, and pressure sensor S3 are connected to the signal inputs of the positive pressure control unit U3. After the positive pressure system is established, the positive pressure control unit U3 controls the main circuit contactor KM1 to connect, and the main battery BAT1 provides power to the main control unit U2 and the equipment circuit unit U1.

[0058] In the above technical solution, the auxiliary battery power supply circuit system includes an auxiliary battery BAT2, and the auxiliary battery BAT2 has two two-wire interfaces, which are respectively connected to the auxiliary battery manual charging socket XS3 and the rear two channels of the manual operating device total load switch QL1, and after passing through the rear two channels of the protective device main circuit breaker QF1, they pass through the positive pressure supply circuit breaker QF5 and the positive pressure control circuit breaker QF2 and are connected to the positive pressure supply circuit unit U4 as a power supply; connected to the positive pressure control circuit rectifier device V2, the outlet of the positive pressure control circuit rectifier device V2 is connected to the positive pressure control unit U3 to provide it with power, and the temperature sensor S1, flow sensor S2, and pressure sensor S3 are respectively connected to the signal input end of the positive pressure control unit U3. When the power supply voltage of the auxiliary battery BAT2 meets the requirements of the composite system, the positive pressure control unit U3 performs a purge operation according to the predetermined logic, pressure flow and temperature parameters. After the purge is completed, the intake volume is reduced and the positive pressure system is established. The positive pressure control unit U3 controls the main circuit contactor KM1 to be turned on and monitors the composite system parameters in real time. When the settings are not met, the main circuit contactor KM1 is cut off and the positive pressure system is re-established according to the pressure flow and temperature parameters.

[0059] In the above technical solution, the auxiliary battery charging system includes a main battery BAT1 and an auxiliary battery BAT2. The two-line power outputs of the two batteries pass through the front two channels and the rear two channels of the manual operating device total load switch QL1 and the main circuit breaker QF1 respectively. The main battery BAT1 is connected together through the positive pressure system circuit contactor KM2, and is connected to the positive pressure supply circuit unit U4 through the positive pressure supply circuit breaker QF5; it is connected to the positive pressure control circuit rectifier V2 through the positive pressure control circuit breaker QF2 to provide power to the positive pressure control unit U3. The positive pressure control unit U3 is connected through the positive pressure system circuit contactor KM2. The communication line is connected to the main battery BAT1 and the auxiliary battery BAT2 to read the battery parameters. When the auxiliary battery BAT2 is lower than the set value, the voltage of the auxiliary battery BAT2 is lower than the voltage of the main battery BAT1. The positive pressure control unit U3 controls the positive pressure system circuit contactor KM2 to connect, connecting the two batteries, so that the main battery BAT1 charges the auxiliary battery BAT2. When the power meets the requirement, the positive pressure system circuit contactor KM2 is disconnected, ending the charging. When the power of both batteries is lower than the set value, the composite system prompts charging. The main battery BAT1 can be charged manually or automatically according to demand. In the event of a fault, if both batteries cannot be charged normally, manual charging can be performed manually.

[0060] The foregoing description of specific exemplary embodiments of the present invention has been presented for purposes of illustration and description. It is not intended to exclude or limit the invention to the precise form disclosed, and it is apparent that many modifications and variations are possible in light of the above teachings. The exemplary embodiments have been selected and described to explain certain principles of the present invention and their practical application so as to enable others skilled in the art to make or utilize the various exemplary embodiments of the present invention, and various alternatives and modifications thereof. It is intended that the scope of the present invention be defined by the claims appended hereto and their equivalents.

[0061] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An explosion-proof AGV composite system using dual battery packs, characterized in that: The composite system includes a main battery power supply circuit system, a secondary battery power supply circuit system and a secondary battery charging system; After the positive pressure system is established, the main battery power supply circuit system controls the main circuit contactor KM1 to be turned on by the positive pressure control unit U3, and the main battery BAT1 provides power to the main control unit U2 and the equipment circuit unit U1; When the supply voltage of the secondary battery BAT2 meets the composite system, the secondary battery supplies power to establish a positive pressure system. The positive pressure control unit U3 controls the main circuit contactor KM1 to turn on and monitors the composite system parameters in real time. When the composite system parameters do not meet the settings, the main circuit contactor KM1 is cut off and the positive pressure system is re-established according to the pressure flow and temperature parameters. The secondary battery charging system connects the positive pressure control unit U3 to the main battery BAT1 and the secondary battery BAT2, reads the battery parameters, and when the secondary battery BAT2 is lower than the set value, the voltage of the secondary battery BAT2 is lower than the voltage of the main battery BAT1. The positive pressure control unit U3 controls the positive pressure system circuit contactor KM2 to turn on, connecting the main battery BAT1 and the secondary battery BAT2, so that the main battery BAT1 charges the secondary battery BAT2.

2. The explosion-proof AGV composite system using dual battery packs according to claim 1, characterized in that: The main battery power supply circuit system is composed of a main battery BAT1, a main battery charging contactor KM3, a main battery charging socket XS1, a main battery manual charging socket XS2, a total load switch QL1, a main circuit breaker QF1, a main circuit contactor KM1, a positive pressure system circuit contactor KM2, a main control system circuit breaker QF3, a main control system rectifier V1, a main control unit U2, a circuit breaker QF4, an equipment circuit unit U1, a positive pressure control circuit breaker QF2, a positive pressure gas supply circuit breaker QF5, a positive pressure control circuit rectifier V2, a positive pressure gas supply circuit unit U4, a positive pressure control unit U3, a temperature sensor S1, a flow sensor S2, a pressure sensor S3 and a positive pressure control unit U3; The main battery BAT1 includes three two-wire connection ports, which are respectively connected to the main battery charging contactor KM3, the main battery manual charging socket XS2 and the main load switch QL1 for manual operation; The main battery BAT1 is connected to the main circuit contactor KM1 and the positive pressure system circuit contactor KM2 via the main load switch QL1 and the main circuit breaker QF1 respectively; One end of the main circuit contactor KM1 is connected through the main control system circuit breaker QF3, the main control system rectifier device V1, and the main control unit U2; the other end of the main circuit contactor KM1 is connected to the equipment circuit unit U1 through the circuit breaker QF4; One end of the positive pressure system circuit contactor KM2 is connected through the positive pressure control circuit breaker QF2, the positive pressure control circuit rectifier V2 and the positive pressure control unit U3; the other end of the positive pressure system circuit contactor KM2 is connected to the positive pressure gas supply circuit unit U4 through the positive pressure gas supply circuit breaker QF5; The positive pressure control unit U3 is connected to the temperature sensor S1, flow sensor S2 and pressure sensor S3 respectively; The main battery charging contactor KM3 is connected to the main battery charging socket XS1.

3. The explosion-proof AGV composite system using dual battery packs according to claim 1, characterized in that: The auxiliary battery power supply circuit system consists of an auxiliary battery BAT2, an auxiliary battery manual charging socket XS3, a total load switch QL1, a main circuit breaker QF1, a positive pressure gas supply circuit breaker QF5, a positive pressure control circuit breaker QF2, a positive pressure gas supply circuit unit U4, a positive pressure control circuit rectifier V2, a positive pressure control unit U3, a temperature sensor S1, a flow sensor S2, and a pressure sensor S3; The auxiliary battery BAT2 includes two two-wire interfaces, which are respectively connected to the auxiliary battery manual charging socket XS3 and the main load switch QL1; The auxiliary battery BAT2 is connected to the positive pressure gas supply circuit breaker QF5 and the positive pressure gas supply circuit unit U4 through the main load switch QL1 and the main circuit breaker QF1; the other end of the main circuit breaker QF1 is connected to the positive pressure control circuit breaker QF2, the positive pressure control circuit rectifier V2 and the positive pressure control unit U3, and the positive pressure control unit U3 is respectively connected to the temperature sensor S1, flow sensor S2 and pressure sensor S3.

4. The explosion-proof AGV composite system using dual battery packs according to claim 1, characterized in that: The auxiliary battery charging system consists of a main battery BAT1, an auxiliary battery BAT2, a total load switch QL1, a main circuit breaker QF1, a positive pressure system circuit contactor KM2, a positive pressure gas supply circuit breaker QF5, a positive pressure gas supply circuit unit U4, a positive pressure control circuit breaker QF2, a positive pressure control circuit rectifier V2 and a positive pressure control unit U3; The main battery BAT1 and the auxiliary battery BAT2 are connected to the total load switch QL1 and the main circuit breaker QF1 in sequence respectively; the main battery BAT1 is connected to the positive pressure gas supply circuit unit U4 through the total load switch QL1, the main circuit breaker QF1, the positive pressure system circuit contactor KM2, and the positive pressure gas supply circuit breaker QF5; the main battery BAT1 is connected to the total load switch QL1, the main circuit breaker QF1, the positive pressure system circuit contactor KM2, the positive pressure control circuit breaker QF2, the positive pressure control circuit rectifier V2 and the positive pressure control unit U3 in sequence, and the main battery BAT1 is connected to the auxiliary battery BAT2 through the total load switch QL1, the main circuit breaker QF1, and the positive pressure system circuit contactor KM2.

5. The explosion-proof AGV composite system using dual battery packs according to claim 2, characterized in that: The main battery BAT1 is connected to the main circuit breaker QF1 via the first two channels of the main load switch QL1; The first two channels of the main circuit breaker QF1 are connected to the main circuit contactor KM1 and the positive pressure system circuit contactor KM2 respectively; One end of the main circuit contactor KM1 is connected to the inlet of the main control system rectifier device V1 through the protection device main control system circuit breaker QF3, and the outlet of the main control system rectifier device V1 is connected to the main control unit U2 to provide power to the main control unit U2; the other end of the main circuit contactor KM1 is connected to the equipment circuit unit U1 through the circuit breaker QF4 to provide power to it; The positive pressure system circuit contactor KM2 is connected to the positive pressure control circuit rectifier V2 and the positive pressure supply circuit unit U4 through the positive pressure control circuit breaker QF2 and the positive pressure supply circuit breaker QF5 respectively. The outlet of the positive pressure control circuit rectifier V2 is connected to the positive pressure control unit U3 to provide power for it; The temperature sensor S1, flow sensor S2, and pressure sensor S3 are respectively connected to the signal input terminals of the positive pressure control unit U3; After the positive pressure system is established, the positive pressure control unit U3 controls the main circuit contactor KM1 to be turned on, and the main battery BAT1 provides power to the main control unit U2 and the equipment circuit unit U1.

6. The explosion-proof AGV composite system using dual battery packs according to claim 3, characterized in that: The auxiliary battery BAT2 includes two two-wire interfaces, which are respectively connected to the auxiliary battery manual charging socket XS3 and the rear two channels of the main load switch QL1; The main load switch QL1 passes through the positive pressure gas supply circuit breaker QF5 and the positive pressure control circuit breaker QF2 through the two rear channels of the main circuit breaker QF1. The positive pressure gas supply circuit breaker QF5 is connected to the positive pressure gas supply circuit unit U4 as a power source. The positive pressure control circuit breaker QF2 is connected to the positive pressure control circuit rectifier V2, and the outlet of the positive pressure control circuit rectifier V2 is connected to the positive pressure control unit U3 to provide power for it; The temperature sensor S1, flow sensor S2, and pressure sensor S3 are respectively connected to the signal input terminals of the positive pressure control unit U3; When the power supply voltage of the auxiliary battery BAT2 meets the requirements of the composite system, the positive pressure control unit U3 performs a purge operation according to the preset logic, pressure flow and temperature parameters. After the purge is completed, the intake volume is reduced and the positive pressure system is established. The positive pressure control unit U3 controls the main circuit contactor KM1 to be turned on and monitors the composite system parameters in real time. When the settings are not met, the main circuit contactor KM1 is cut off and the positive pressure system is re-established according to the pressure flow and temperature parameters.

7. The explosion-proof AGV composite system using dual battery packs according to claim 4, characterized in that: The two-line power output of the main battery BAT1 and the auxiliary battery BAT2 passes through the front two channels and the rear two channels of the main load switch QL1 and the main circuit breaker QF1 respectively; The main battery BAT1 is connected to the positive pressure gas supply circuit unit U4 through the positive pressure system circuit contactor KM2 and the positive pressure gas supply circuit breaker QF5; The main battery BAT1 is connected to the positive pressure control circuit rectifier V2 through the positive pressure control circuit breaker QF2 to provide power to the positive pressure control unit U3; The positive pressure control unit U3 is connected to the main battery BAT1 and the auxiliary battery BAT2 through a communication line to read the battery parameters. When the auxiliary battery BAT2 is lower than the set value, the voltage of the auxiliary battery BAT2 is lower than the voltage of the main battery BAT1. The positive pressure control unit U3 controls the positive pressure system loop contactor KM2 to connect, connecting the two batteries, so that the main battery BAT1 charges the auxiliary battery BAT2. When the power meets the requirements, the positive pressure system loop contactor KM2 is disconnected to end charging. When the power of the two batteries is lower than the set value, the composite system prompts charging and manually or automatically charges the main battery BAT1 according to demand. When a fault occurs and both the main battery BAT1 and the auxiliary battery BAT2 cannot be charged normally, manual charging is performed by human intervention.

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