Safety protection device for replaceable battery pack for mining

Abstract

The application relates to a replaceable battery pack safety protection device for mines, belonging to the electrical explosion-proof field, comprising a sealed shell, a battery pack, a relay assembly, a first reliable resistor, a double diode, a fuse, an anti-reverse charging diode and a reliable resistor row arranged in the sealed shell; the positive pole of the battery pack is connected with the fuse and the relay assembly in sequence and led out of the sealed shell, and the negative pole of the battery pack is directly led out of the sealed shell; the anti-reverse charging diode is connected with the battery pack and the fuse in parallel; the double diode and the first reliable resistor are connected with the relay assembly in parallel respectively; the relay assembly is provided with a control switch led out of the sealed shell; and the reliable resistor row is connected between each single battery in the battery pack and led out of the sealed shell. The scheme guarantees the safety of the replaceable battery pack, reduces the volume of the explosion-proof power box and improves the use efficiency of the battery pack, so that the overall cost of the explosion-proof power box is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of electrical explosion prevention, and relates to a safety protection device for a replaceable battery pack for mine use. BACKGROUND

[0002] At present, the protection mode of the replaceable battery pack in the explosion-proof and intrinsic safety type power supply box mostly adopts the mode of independent battery pack compartment to ensure that the battery pack is in a safe state when the power supply is opened and connected, however, the independent compartment mode is simple to implement, but at the same time, it causes the problem of large volume and high cost of the power supply box; and the pure intrinsic safety treatment mode will cause the use efficiency of the battery pack to be greatly reduced. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a safety protection device for a replaceable battery pack for mine use.

[0004] To achieve the above purpose, the present application provides the following technical scheme:

[0005] A safety protection device for a replaceable battery pack for mine use, comprising a sealed shell, a battery pack, a relay assembly, a first reliable resistor, a double diode, a fuse, an anti-reverse charging diode and a reliable resistor bank arranged in the sealed shell; the positive electrode of the battery pack is connected in series with the fuse and the relay assembly in sequence, and is led out of the sealed shell, and the negative electrode of the battery pack is directly led out of the sealed shell; the anti-reverse charging diode is connected in parallel with the battery pack and the fuse; the double diode and the first reliable resistor are connected in parallel with the relay assembly respectively; the relay assembly is provided with a control switch led out of the sealed shell; and the reliable resistor bank is connected between each single battery in the battery pack and is led out of the sealed shell.

[0006] Further, the positive electrode of the anti-reverse charging diode is connected with the negative electrode of the battery pack, and the negative electrode of the anti-reverse charging diode is connected with the positive electrode of the battery pack.

[0007] Further, the double diode comprises two diodes connected in head-to-tail manner, the positive electrode of which is connected with the positive electrode lead-out wire of the battery pack, and the negative electrode of which is connected with the fuse.

[0008] Further, the relay assembly controls the on-off through the control switch, the control switch is a knob switch, and the control input line of the knob switch is led out of the sealed shell.

[0009] Further, the sealed shell is a potting shell sealed by epoxy resin glue.

[0010] The beneficial effects of the present invention are as follows: this solution combines a battery pack with an additional safety protection device and adopts a combined overall epoxy resin encapsulation method to ensure the safety of the replaceable battery pack, reduce the volume of the explosion-proof power box and improve the utilization efficiency of the battery pack, thereby reducing the overall cost of the explosion-proof power box.

[0011] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0013] Figure 1 This is a schematic diagram of the safety protection device structure of a replaceable battery pack for mining. DETAILED DESCRIPTION

[0014] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0015] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0016] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0017] See also Figure 1 , is a safety protection device for a replaceable battery pack for mining, comprising a sealed housing, a battery pack, a relay assembly, a first reliable resistor, a double diode, a fuse, an anti-reverse charging diode and a reliable resistor row arranged in the sealed housing; the positive pole of the battery pack is connected in series with the fuse and the relay assembly in sequence and led out of the sealed housing, and the negative pole of the battery pack is directly led out of the sealed housing; the anti-reverse charging diode is connected in parallel with the battery pack and the fuse; the double diode and the first reliable resistor are respectively connected in parallel with the relay assembly; a control switch leading out of the sealed housing is provided in the relay assembly; the reliable resistor row is connected between the single cells in the battery pack and led out of the sealed housing.

[0018] In one embodiment, the positive electrode of the anti-reverse charging diode is connected to the negative electrode of the battery pack, and the negative electrode of the anti-reverse charging diode is connected to the positive electrode of the battery pack.

[0019] In another embodiment, the double diode includes two diodes connected end to end, with the positive electrodes of the diodes connected to the positive lead of the battery pack and the negative electrodes of the diodes connected to the fuse.

[0020] Optionally, the relay assembly is controlled to be on and off by a control switch, and the control switch is a knob switch, and a control input line of the knob switch is led out of the sealed housing.

[0021] Optionally, the sealed housing is a potted housing sealed with epoxy resin.

[0022] This solution eliminates the safety hazard of direct contact with underground explosive gases by epoxy-sealing the battery pack and protective device as a whole. The detection signals directly drawn out from the single cells in the battery pack are subjected to intrinsic safety treatment and then directly led out. The power output of the battery pack consists of two parts, the intrinsically safe direct output and the non-intrinsically safe output, which will be manually controlled by the user after the flameproof power box is turned off. This solution has made the single cell detection wiring and the battery pack power line intrinsically safe. In the above embodiment, a relay control circuit is added to the battery pack power line, and the conduction or shutdown of the relay will be controlled by an external person controlling the state of the knob switch. In the above embodiment, the battery pack power line is connected in series with a temperature fuse and a temperature switch to ensure that the epoxy seal is prohibited from external output when it fails or overcurrent occurs. This solution also prevents external reverse charging damage to the battery by connecting a diode in parallel to the battery pack.

[0023] When the knob switch is in the off state before the power box shell is opened, the shutdown control signal will cause the relay component to be in the off state. At this time, the external electrical signal of the battery pack will be limited by the first reliable resistor and the reliable resistor row to limit the output energy of the battery to achieve the purpose of output intrinsic safety. The double diode is used to ensure the reliable charging of the battery pack, the anti-reverse charging diode is used to protect the battery pack, and the fuse limits the charging and discharging current of the battery pack to ensure that the working current of the battery pack meets the manufacturer's requirements and ensures that the epoxy resin curing will not fail due to excessively high internal working temperature; since there is a non-intrinsically safe circuit in the potting shell, the epoxy resin is completely encapsulated to completely isolate the non-intrinsically safe circuit from the hazardous gas environment underground and eliminate safety hazards.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A safety protection device for a replaceable battery pack for mining, characterized by: The invention comprises a sealed housing, a battery pack, a relay assembly, a first reliable resistor, a double diode, a fuse, an anti-reverse charge diode, and a reliable resistor bank arranged within the sealed housing; the positive electrode of the battery pack is sequentially connected in series with the fuse and the relay assembly and leads out of the sealed housing, while the negative electrode of the battery pack is directly led out of the sealed housing; the anti-reverse charge diode is connected in parallel with the battery pack and the fuse; the double diode and the first reliable resistor are respectively connected in parallel with the relay assembly; a control switch is provided within the relay assembly and leads out of the sealed housing; the reliable resistor bank is connected between the individual cells in the battery pack and leads out of the sealed housing; The positive electrode of the anti-reverse charging diode is connected to the negative electrode of the battery pack, and the negative electrode of the anti-reverse charging diode is connected to the positive electrode of the battery pack; The double diode comprises two diodes connected end to end, with the positive electrode of the diode connected to the positive lead of the battery pack and the negative electrode of the diode connected to the fuse; The relay assembly is controlled to be on and off by a control switch. The control switch is a knob switch. The control input line of the knob switch is led out of the sealed housing.

2. The safety protection device for a replaceable battery pack for mining according to claim 1, characterized in that: The sealed housing is a potting housing sealed with epoxy resin.

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