Connecting device

Abstract

This invention provides a connection device for connecting a battery and an instrument. The connection device includes: a first control circuit and a second control circuit connected in parallel between the positive and negative terminals of the battery; and a third control circuit disposed between the battery and the instrument. The first control circuit has a first switching element; the second control circuit has a first control element and a first unidirectional conduction element, wherein when the first unidirectional conduction element is turned on, the first control element turns on the first switching element; the third control circuit has a second switching element; the first control circuit also has a second control element connected between the first switching element and the negative terminal of the battery, wherein when the first switching element is turned on, the second control element is turned on. The technical solution of this application effectively solves the problem of reversed positive and negative terminals when connecting an instrument and a battery in related technologies.

Description

Technical Field

[0001] This invention relates to the field of discharge equipment technology, and more specifically, to a connection device. Background Technology

[0002] Battery packs play a vital role in power systems, and ensuring battery performance and lifespan is extremely important.

[0003] In the existing technology, the discharge of the battery pack not only causes the temperature of the battery compartment to rise, which has a great impact on the operation and life of the battery pack, but also the positive and negative terminals of the discharge line are easily reversed. This can damage the safety of the battery pack and discharge equipment, or even cause a short circuit in the battery and even cause a fire, resulting in personal injury and equipment accidents. Summary of the Invention

[0004] The main objective of this invention is to provide a connection device to solve the problem that the positive and negative terminals may be reversed when connecting instruments and batteries in related technologies.

[0005] To achieve the above objectives, according to one aspect of the present invention, a connecting device is provided for connecting a battery and an instrument. The connecting device includes: a housing with a positive terminal and a negative terminal of the battery disposed thereon; and a circuit assembly disposed on the housing, the circuit assembly including a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit. The first and second control circuits are connected in parallel between the positive and negative terminals of the battery, and the third control circuit is disposed between the battery and the instrument. The first control circuit has a first switching element; the second control circuit has a first control element and a first unidirectional conduction element. When the circuit is on, the first control element turns on the first switching element; when the first unidirectional conduction element is off, the first switching element is off. A second switching element is provided on the third control circuit. The first control circuit also includes a second control element connected between the first switching element and the negative terminal of the battery. When the first switching element is on, the second control element is on; when the first switching element is off, the second control element is off. A first indicator is provided on the fourth control circuit, which is connected between the first control circuit and the negative terminal of the battery. The connection point between the fourth control circuit and the first control circuit is located between the first switching element and the second control element. When the first switching element is on, the first indicator is in a first indicating state.

[0006] Furthermore, the first unidirectional conducting element includes a diode.

[0007] Furthermore, the first control circuit is also provided with a first step-down component, which is connected between the battery and the first control component, and a first unidirectional conduction component is provided between the positive terminal of the battery and the first step-down component.

[0008] Furthermore, the circuit assembly also includes a fifth control circuit, which is disposed between the positive terminal and the negative terminal of the battery. The fifth control circuit is equipped with a third switching element and a second indicator, with the third switching element disposed between the positive terminal and the second indicator. The circuit assembly also includes a sixth control circuit, which is disposed between the positive terminal and the negative terminal of the battery. The sixth control circuit is equipped with a third control element and a second unidirectional conduction element. The conduction direction of the second unidirectional conduction element is opposite to that of the first unidirectional conduction element. When the second unidirectional conduction element is on, the third control element and the third switching element are on. When the second unidirectional conduction element is off, the third control element and the third switching element are off. When the third switching element is on, the second indicator is in the second indicating state.

[0009] Furthermore, a second step-down component is provided on the sixth control circuit. The second step-down component is connected between the battery and the third control component. A second unidirectional conduction component is provided between the positive terminal of the battery and the second step-down component.

[0010] Furthermore, the second control circuit is also equipped with a voltmeter and an ammeter. The ammeter is positioned between the first unidirectional conductor and the first step-down component. The first terminal of the voltmeter is located between the first unidirectional conductor and the ammeter, and the second terminal of the voltmeter is connected to the first step-down component.

[0011] Furthermore, a manual switch is also provided on the first control circuit, which is located between the positive terminal of the battery and the first switching element.

[0012] Furthermore, the circuit assembly also includes a seventh control circuit, which is connected between the first control circuit and the negative terminal of the battery. The connection between the seventh control circuit and the first control circuit is located between the manual switch and the first switching element. A third indicator is provided on the seventh control circuit.

[0013] Furthermore, the housing is also equipped with a positive terminal and a negative terminal for the instrument. The third switching element is located between the negative terminal of the battery and the positive terminal of the instrument. The circuit assembly also includes an eighth control circuit, which is connected between the first control circuit and the negative terminal of the battery. The connection between the eighth control circuit and the first control circuit is located between the first switching element and the second control element. The eighth control circuit is equipped with a fourth control element, and the third control circuit is also equipped with a fourth switching element. The fourth switching element is located between the negative terminal of the battery and the negative terminal of the instrument. When the fourth control element is turned on, the fourth switching element is turned on; when the fourth control element is turned off, the fourth switching element is turned off.

[0014] Furthermore, the connecting device also includes a movable component located at the bottom of the housing.

[0015] According to the technical solution of this invention, a connecting device is connected between a battery and an instrument. The connecting device includes a housing and a circuit assembly mounted on the housing. The circuit assembly includes a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit. The first control circuit is located between the positive and negative terminals of the battery. The second control circuit is located between the positive and negative terminals of the battery, and the first and second control circuits are connected in parallel. The third control circuit is located between the battery and the instrument. The first control circuit has a first switching element and a second control element, with the second control element connected between the first switching element and the negative terminal of the battery. The second control circuit has a first control element and a first unidirectional conduction element. The third control circuit has a second switching element. The fourth control circuit is connected to the first control circuit between the first switching element and the second control element, and is connected to the negative terminal of the battery. The fourth control circuit has a first indicator. When the first unidirectional conduction element is activated, the first control element activates the first switching element, which in turn activates the second control element, and the first indicator is in a first indicating state. When the first unidirectional conductor is disconnected, the first switching component and the second control component are also disconnected. Through the above configuration, when the battery's positive terminal is connected to the battery's positive terminal and the battery's negative terminal is connected to the battery's negative terminal, the first unidirectional conductor can conduct, thereby energizing the first control component. This, in turn, energizes the first switching component, which in turn energizes the second control component, enabling the second switching component to conduct. This allows a circuit to be formed between the battery and the instrument, facilitating current flow. When the first switching component is conducting, the first indicator is in the first indicating state, providing a prompt to the operator to determine whether the second switching component is conducting. When the battery's positive terminal is connected to the battery's negative terminal and the battery's negative terminal is connected to the battery's positive terminal, the first unidirectional conductor cannot conduct, leading to the disconnection of the first switching component, the second control component, and the second switching component. This prevents a circuit from being formed between the battery and the instrument, thus avoiding reversed polarity. Therefore, the technical solution of this application effectively solves the problem of reversed polarity when connecting the instrument and battery in related technologies. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the connecting device according to the present invention is shown;

[0018] Figure 2 It shows Figure 1 A three-dimensional structural diagram of the connecting device from another perspective;

[0019] Figure 3 It shows Figure 1 A schematic diagram of the connection device;

[0020] Figure 4 It shows Figure 1 A schematic diagram of the connection device between the battery and the instrument.

[0021] The above figures include the following reference numerals:

[0022] 1. Battery; 2. Instrument; 10. Housing; 11. Battery positive terminal; 12. Battery negative terminal; 13. Instrument positive terminal; 14. Instrument negative terminal; 20. Circuit assembly; 21. First control circuit; 211. First switching element; 212. Second control element; 213. Manual switch; 22. Second control circuit; 221. First control element; 222. First unidirectional conduction element; 223. First step-down element; 224. Voltmeter; 225. Ammeter; 23 231. Third control circuit; 232. Second switching element; 233. Fourth switching element; 24. Fourth control circuit; 241. First indicator; 25. Fifth control circuit; 251. Third switching element; 252. Second indicator; 26. Sixth control circuit; 261. Third control element; 262. Second unidirectional conduction element; 263. Second step-down element; 27. Seventh control circuit; 271. Third indicator; 28. Eighth control circuit; 281. Fourth control element; 30. Moving element. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0026] like Figures 1 to 4 As shown, the connection device in this embodiment is used to connect between battery 1 and instrument 2. The connection device includes a housing 10 and a circuit assembly 20. The housing 10 has a positive terminal 11 and a negative terminal 12 for the battery. The circuit assembly 20 is mounted on the housing and includes a first control circuit 21, a second control circuit 22, a third control circuit 23, and a fourth control circuit 24. The first control circuit 21 and the second control circuit 22 are connected in parallel between the positive terminal 11 and the negative terminal 12, and the third control circuit 23 is located between battery 1 and instrument 2. The first control circuit 21 has a first switching element 211. The second control circuit 22 has a first control element 221 and a first unidirectional conduction element 222. When the first unidirectional conduction element 222 is on, the first control element 221 turns on the first switching element 211; when the first unidirectional conduction element 222 is off, the first switching element 211 is off. The third control circuit 23 has a second switching element 231. The first control circuit 21 is further provided with a second control element 212, which is connected between the first switching element 211 and the negative terminal 12 of the battery. When the first switching element 211 is turned on, the second control element 212 is turned on; when the first switching element 211 is turned off, the second control element 212 is turned off. The fourth control circuit 24 is provided with a first indicator 241, which is connected between the first control circuit 21 and the negative terminal 12 of the battery. The connection point between the fourth control circuit 24 and the first control circuit 21 is located between the first switching element 211 and the second control element 212. When the first switching element 211 is turned on, the first indicator 241 is in a first indicating state.

[0027] Using the technical solution of this invention, a connecting device is connected between battery 1 and instrument 2. The connecting device includes a housing 10 and a circuit assembly 20 disposed on the housing 10. The circuit assembly 20 includes a first control circuit 21, a second control circuit 22, a third control circuit 23, and a fourth control circuit 24. The first control circuit 21 is disposed between the positive terminal 11 and the negative terminal 12 of the battery. The second control circuit 22 is disposed between the positive terminal 11 and the negative terminal 12 of the battery. The first control circuit 21 and the second control circuit 22 are arranged in parallel. The third control circuit 23 is disposed between battery 1 and instrument 2. The first control circuit 21 is provided with a first switching element 211 and a second control element 212. The second control element 212 is connected between the first switching element 211 and the negative terminal 12 of the battery. The second control circuit 22 is provided with a first control element 221 and a first unidirectional conduction element 222. The third control circuit 23 is provided with a second switching element 231. The connection point between the fourth control circuit 24 and the first control circuit 21 is located between the first switching element 211 and the second control element 212. The fourth control circuit 24 is connected to the negative terminal 12 of the battery. A first indicator 241 is provided on the fourth control circuit 24. When the first unidirectional conduction element 222 is turned on, the first control element 221 causes the first switching element 211 to turn on, and the turning on of the first switching element 211 enables the second control element 212 to turn on, and the first indicator 241 is in a first indicating state. When the first unidirectional conduction element 222 is turned off, the first switching element 211 is turned off, and the second control element 212 is turned off. With the above setup, when the positive terminal 11 of the battery is connected to the positive terminal of battery 1 and the negative terminal 12 of the battery is connected to the negative terminal of the battery, the first unidirectional conductor 222 can conduct, thereby energizing the first control unit 221. The first control unit 221 then activates the first switching unit 211, which in turn energizes the second control unit 212, which in turn activates the second switching unit 231. This allows a circuit to be formed between battery 1 and instrument 2, enabling current flow. When the first switching unit 211 is activated, the first indicator 241 is in the first indicating state, thus providing a prompt to the operator, facilitating the operator's judgment on whether the second switching unit 231 is activated. When the positive terminal 11 of the battery is connected to the negative terminal of battery 1 and the negative terminal 12 of the battery is connected to the positive terminal of battery 1, the first unidirectional conductor 222 cannot conduct, thereby causing the first switching element 211 to disconnect, the second control element 212 to disconnect, and the second switching element 231 to disconnect, preventing a circuit from being formed between battery 1 and instrument 2 and avoiding reverse polarity. Therefore, the technical solution of this application effectively solves the problem of possible reverse polarity when connecting the instrument and the battery in related technologies.

[0028] Battery 1 is a 24V battery.

[0029] Instrument 2 is a discharge instrument.

[0030] The enclosure is equipped with anti-collision strips around its perimeter to protect operators from injury when they bump into the corners of the enclosure.

[0031] like Figure 3 As shown, in this embodiment, the first unidirectional conductor 222 includes a diode. The diode has unidirectional conduction characteristics, ensuring that current flows when the battery positive terminal 11 and battery negative terminal 12 are correctly connected, and that current cannot flow when the battery positive terminal 11 and battery negative terminal 12 are incorrectly connected.

[0032] like Figure 3 As shown, in this embodiment, the first control circuit 21 is further provided with a first step-down component 223, which is connected between the battery 1 and the first control component 221. A first unidirectional conductor 222 is disposed between the positive terminal 11 of the battery and the first step-down component 223. The first step-down component 223 can reduce the voltage to ensure the normal operation of the first control component 221.

[0033] like Figure 3 As shown, in this embodiment, the circuit assembly 20 further includes a fifth control circuit 25, which is disposed between the positive terminal 11 and the negative terminal 12 of the battery. The fifth control circuit 25 is equipped with a third switching element 251 and a second indicator 252, with the third switching element 251 positioned between the positive terminal 11 and the second indicator 252. The circuit assembly 20 also includes a sixth control circuit 26, which is disposed between the positive terminal 11 and the negative terminal 12 of the battery. The sixth control circuit 26 is equipped with a third control element 261 and a second unidirectional conduction element 262. The conduction directions of the second unidirectional conduction element 262 and the first unidirectional conduction element 262 are opposite. When the second unidirectional conduction element 262 is on, the third control element 261 and the third switching element 251 are on; when the second unidirectional conduction element 262 is off, the third control element 261 and the third switching element 251 are off. When the third switching element 251 is on, the second indicator 252 is in a second indicating state. When the positive terminal 11 of battery 1 is connected to the negative terminal of battery 1, and the negative terminal 12 of battery 1 is connected to the positive terminal of battery 1, the second unidirectional conductor 262 is activated, thereby energizing the third control unit 261, enabling the third switching unit 251 to conduct, and the second indicator 252 to issue a prompt, allowing the operator to determine that the positive terminal 11 and the negative terminal 12 of battery 1 are connected incorrectly. When the positive terminal 11 of battery 1 is connected to the positive terminal of battery 1, and the negative terminal 12 of battery 1 is connected to the negative terminal of battery 1, the second indicator 252 will not issue a prompt, avoiding misjudgment by the operator.

[0034] The second unidirectional conductor is also a diode.

[0035] like Figure 3 As shown, in this embodiment, the sixth control circuit 26 is provided with a second step-down component 263, which is connected between the battery 1 and the third control component 261. A second unidirectional conductor 262 is disposed between the battery positive terminal 11 and the second step-down component 263. The second step-down component 263 can reduce the voltage to ensure the normal operation of the third control component 261.

[0036] Both the first step-down component 223 and the second step-down component 263 are transformers.

[0037] The sixth control circuit 26 is also equipped with a third unidirectional conductor, which is located between the second step-down component and the battery negative terminal 12.

[0038] The third unidirectional conductor is also a diode. The conduction direction of the third unidirectional conductor is the same as that of the first unidirectional conductor.

[0039] The second control circuit 22 is also provided with a fourth unidirectional conductor, and the third unidirectional conductor is located between the first step-down component and the battery negative terminal 12.

[0040] The fourth unidirectional conductive element is also a diode. The conduction direction of the fourth unidirectional conductive element is the same as that of the second unidirectional conductive element.

[0041] When the current flows in the second control circuit 22, it flows from the positive terminal 11 of the battery through the first unidirectional conductor 222, then into the first step-down component, then out of the first step-down component 223, and after out of the first step-down component 223, it flows through the third unidirectional conductor and then to the negative terminal 12 of the battery.

[0042] When the current flows in the sixth control circuit 26, it flows from the positive terminal 11 of the battery through the fourth unidirectional conductor, then into the second step-down component 263, then out of the second step-down component 263, and after out of the second step-down component 263, it flows through the second unidirectional conductor 262 and then into the negative terminal 12 of the battery.

[0043] The first step-down component 223 has a first input terminal, a first output terminal, a second input terminal, and a second output terminal.

[0044] The ammeter is connected to the first input terminal. The third unidirectional conductor is connected to the first output terminal.

[0045] The first control unit is connected between the second input terminal and the second output terminal so that after the circuit flows into the first step-down unit, the first step-down unit can supply power to the first control unit 221.

[0046] The second step-down device 263 has a third input terminal, a third output terminal, a fourth input terminal, and a fourth output terminal.

[0047] The second unidirectional conductor is connected to the third input terminal. The fourth unidirectional conductor is connected to the third output terminal.

[0048] The second control unit is connected between the fourth input terminal and the fourth output terminal so that after the circuit flows into the second step-down unit, the second step-down unit can supply power to the third control unit 261.

[0049] like Figure 3 As shown, in this embodiment, the second control circuit 22 is further equipped with a voltmeter 224 and an ammeter 225. The ammeter 225 is positioned between the first unidirectional conductor 222 and the first step-down component 223. The first terminal of the voltmeter 224 is located between the first unidirectional conductor 222 and the ammeter 225, and the second terminal of the voltmeter 224 is connected to the first step-down component 223. The ammeter 225 can measure the current on the second control circuit 22. The voltmeter 224 can measure the voltage between the first unidirectional conductor 222 and the first control component 221.

[0050] The second terminal of voltmeter 224 is located between the first step-down component 223 and the third unidirectional conduction component.

[0051] like Figure 3 As shown, in this embodiment, a manual switch 213 is also provided on the first control circuit 21. The manual switch 213 is located between the positive terminal 11 of the battery and the first switching element 211. After the manual switch 213 is closed, the first switching element 211 is turned on, and the current can flow in the first control circuit 21, making the use of the connection device safer.

[0052] like Figure 3 As shown, in this embodiment, the circuit assembly 20 further includes a seventh control circuit 27. The seventh control circuit 27 is connected between the first control circuit 21 and the battery negative terminal 12. The connection point between the seventh control circuit 27 and the first control circuit 21 is located between the manual switch 213 and the first switching element 211. A third indicator 271 is provided on the seventh control circuit 27. After the manual switch 213 is closed, the third indicator 271 can issue a prompt, indicating to the operator that the connection device has been connected, facilitating careful and safe operation by the operator.

[0053] like Figure 3As shown, in this embodiment, the housing is also provided with an instrument positive terminal 13 and an instrument negative terminal 14. The third switching element is located between the battery negative terminal and the instrument positive terminal. The circuit assembly 20 also includes an eighth control circuit 28, which is connected between the first control circuit 21 and the battery negative terminal 12. The connection between the eighth control circuit 28 and the first control circuit 21 is located between the first switching element 211 and the second control element 212. A fourth control element 281 is provided on the eighth control circuit 28, and a fourth switching element 232 is provided on the third control circuit 23. The fourth switching element 232 is located between the battery negative terminal 12 and the instrument negative terminal 14. When the fourth control element 281 is on, the fourth switching element 232 is on; when the fourth control element 281 is off, the fourth switching element 232 is off. When the fourth control element 281 is on, the fourth switching element 232 can be on, thereby enabling the battery negative terminal 12 and the instrument negative terminal 14 to conduct, thus realizing the flow of current.

[0054] like Figure 3 As shown, in this embodiment, the connecting device further includes a movable member 30 disposed at the bottom of the housing 10. The movable member 30 allows the connecting device to be positioned in different locations.

[0055] The moving part 30 includes multiple omnidirectional brake wheels.

[0056] The first indicator 241, the second indicator 252, and the third indicator 271 are all indicator lights. The first indicator 241, the second indicator 252, and the third indicator 271 emit different lights.

[0057] When the current flows in the first control circuit 21, it flows out from the positive terminal 11 of the battery, then flows through the first switching element 211 and the second control element 212 in sequence, and flows back to the negative terminal 12 of the battery.

[0058] When the current flows in the third control circuit 23, it flows out from the positive terminal 11 of the battery, and then flows sequentially through the second switching element 231, the positive terminal 13 of the instrument, the instrument 2, the negative terminal 14 of the instrument, and the fourth switching element 232, before flowing back to the negative terminal 12 of the battery.

[0059] When the current flows in the fourth control circuit 24, it flows in through the first switching element 211, then through the first indicator element 241, and flows back to the negative terminal 12 of the battery.

[0060] When the current flows in the fifth control circuit 25, it flows out from the positive terminal 11 of the battery, then flows through the third switching element 251 and the second indicator 252 in sequence, and flows back to the negative terminal 12 of the battery.

[0061] When the current flows in the seventh control circuit 27, it flows out from the positive terminal 11 of the battery, then flows through the third indicator 271, and flows back to the negative terminal 12 of the battery.

[0062] When the current flows in the eighth control circuit 28, it flows in through the first switching element 211, then through the fourth control element 281, and flows back to the negative terminal 12 of the battery.

[0063] The first switching element 211, the second switching element 231, the fourth switching element 232, and the third switching element 251 are all switches.

[0064] The second control element 212, the first control element 221, the third control element 261, and the fourth control element 281 are all electromagnetic coils.

[0065] The connection device in this embodiment is a novel and convenient anti-accidental discharge device. The device includes a cable reel with a 5m cable. The cable reel can be selected according to site requirements to allow the discharger to be placed outdoors from the battery compartment, avoiding any impact on the battery compartment temperature. The device also includes a positive / negative polarity detection circuit with indicator lights. The connection is only conductive when the battery side is correctly wired; incorrect wiring prevents conduction, avoiding serious consequences from reversed polarity. Furthermore, the positive and negative polarity shapes on the discharger and battery sides are different, physically preventing reversed discharge wire polarity. The device is also equipped with an ammeter and voltmeter to monitor the discharge current and battery voltage changes in real time. It features a manual switch 213 for manual operation and an air switch that automatically trips in case of overcurrent or internal short circuit, ensuring uninterrupted battery operation. Externally, the device is equipped with casters and a handle for easy carrying, transport, and securing.

[0066] The positive and negative terminals connected to the discharge instrument and the battery are battery positive terminal 11, battery negative terminal 12, instrument positive terminal 13, and instrument negative terminal 14.

[0067] The battery positive terminal 11, battery negative terminal 12, instrument positive terminal 13, and instrument negative terminal 14 have different external structures. This further prevents the positive and negative terminals from being reversed.

[0068] When in use, the battery positive terminal 11, battery negative terminal 12, instrument positive terminal 13, and instrument negative terminal 14 can be pulled out from the box.

[0069] The cross-section of the battery positive terminal 11 is circular. The cross-section of the battery negative terminal 12 is triangular. The cross-section of the instrument positive terminal 13 is quadrilateral. The cross-section of the instrument negative terminal 14 is trapezoidal.

[0070] When using the device in the field, first place it and the discharger outside the battery room. Select the required length on the wire reel side according to the actual site conditions, pull it out and secure it. The reel has a self-locking function and can be pulled out to any length. Then connect the wires on the battery side and the discharger side. The positive and negative terminals have different plug shapes to physically prevent reverse connection. Connect the device's power cord to a 220V external power source, turn on the air switch, and rotate the manual switch to the ON position. At this time, the power indicator light (yellow light) will illuminate. Check that the correct wiring indicator light (green light) is on and the incorrect wiring indicator light (red light) is off, indicating correct wiring. The discharger can then be operated to begin discharging. During operation, the ammeter and voltmeter of the device can be observed to monitor the discharge current and battery voltage changes in real time. In case of emergency, rotate the manual on / off knob to the OFF position or disconnect the air switch. The air switch will automatically trip in case of overcurrent (100A) or internal short circuit, without affecting the operation of the battery pack. After the discharge operation is completed, turn off the air switch, rotate the manual on / off knob to the off position, unplug the power cord, disconnect the battery side and the discharger side wiring, and retract the reel. The reel has an automatic retraction function; pull the cord out a little further and the reel will retract automatically.

[0071] The power indicator light (yellow) is the third indicator 271. The correct wiring indicator light (green) is the first indicator 241. The incorrect wiring indicator light (red) is the second indicator 252.

[0072] The 220V power supply is provided by the battery connected to the device via a power cord; the circuit breaker can automatically trip in case of overcurrent, internal short circuit, etc., without affecting battery operation. A manual switch allows manual stopping of discharge in emergencies.

[0073] The instrument is a discharge instrument.

[0074] The device can perform the following functions:

[0075] 1. Equipped with a 5m long cable reel, the reel has a self-locking function and can be pulled out to any length for fixing. The required length can be selected according to site needs, so that the discharger can be placed outside the battery room for discharge, avoiding the influence of the discharger on the temperature of the battery room. The cable reel has an automatic retraction function, which is convenient and easy to operate.

[0076] 2. A positive and negative polarity discrimination circuit is provided. The internal output discharge instrument can only be connected and discharged when the positive and negative terminals on the battery side are connected correctly, thus avoiding serious consequences caused by reversed positive and negative terminals.

[0077] 3. There are indicator lights to show whether the wiring is correct.

[0078] 4. The positive and negative terminals of the device are different on the discharge instrument side and the battery side, which avoids the positive and negative terminals of the discharge wire being reversed from a physical perspective, and makes up for the deficiency that "the circuit cannot determine whether the wiring on the discharge instrument side is correct" from a physical perspective.

[0079] 5. Equipped with ammeters and voltmeters, it can monitor the discharge current and battery pack voltage changes in real time.

[0080] 6. Equipped with a manual switch, it can be manually switched on and off, and the discharge can be manually stopped in an emergency.

[0081] 7. Equipped with an air switch, it can automatically trip in case of overcurrent (100A) or internal short circuit, without affecting the operation of the battery pack.

[0082] 8. It is equipped with swivel brake wheels and handles on the outside, making it easy to carry, move and fix.

[0083] 9. The device casing is made of materials with good insulation properties and is equipped with grounding studs. The discharge wire and non-contact surfaces of the connectors are all wrapped with materials with good insulation properties, ensuring high safety performance.

[0084] The connection device in this embodiment not only greatly improves the safety of battery discharge operation and avoids personal and equipment accidents and serious consequences caused by incorrect positive and negative terminal wiring, but also avoids the influence of the discharge instrument on the battery compartment temperature, which can improve battery performance and service life, while greatly reducing maintenance and replacement costs.

[0085] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0086] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0087] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0088] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A connecting device for connecting between a battery (1) and an instrument (2), characterized in that, The connecting device includes: The housing (10) is provided with a battery positive terminal (11) and a battery negative terminal (12). A circuit assembly (20) is disposed on the housing. The circuit assembly (20) includes a first control circuit (21), a second control circuit (22), a third control circuit (23), and a fourth control circuit (24). The first control circuit (21) and the second control circuit (22) are disposed in parallel between the positive terminal (11) and the negative terminal (12) of the battery. The third control circuit (23) is disposed between the battery (1) and the instrument (2). The first control circuit (21) is provided with a first switching element (211). The second control circuit (22) is provided with a first control element (221) and a first unidirectional conduction element (222). When the first unidirectional conduction element (222) is turned on, the first control element (221) turns on the first switching element (211). When the first unidirectional conduction element (222) is turned off, the first switching element (211) is turned off. The third control circuit (23) is provided with a second switching element (231); The first control circuit (21) is further provided with a second control element (212), which is connected between the first switching element (211) and the negative terminal of the battery (12). When the first switching element (211) is turned on, the second control element (212) is turned on, and when the first switching element (211) is turned off, the second control element (212) is turned off. The fourth control circuit (24) is provided with a first indicator (241). The fourth control circuit (24) is connected between the first control circuit (21) and the negative terminal (12) of the battery. The connection between the fourth control circuit (24) and the first control circuit (21) is located between the first switching element (211) and the second control element (212). When the first switching element (211) is turned on, the first indicator (241) is in the first indicating state. The circuit assembly (20) further includes a fifth control circuit (25), which is disposed between the positive terminal (11) and the negative terminal (12) of the battery. The fifth control circuit (25) is provided with a third switching element (251) and a second indicator (252), which is disposed between the positive terminal (11) and the second indicator (252). The circuit assembly (20) further includes a sixth control circuit (26), which is disposed between the positive terminal (11) and the negative terminal (12) of the battery. The sixth control circuit (26) is provided with a third control element (261) and a second unidirectional conduction element (262). The conduction direction of the second unidirectional conduction element (262) is opposite to that of the first unidirectional conduction element (222). When the second unidirectional conduction element (262) is on, the third control element (261) is on and the third switching element (251) is on. When the second unidirectional conduction element (262) is off, the third control element (261) is off and the third switching element (251) is off. When the third switching element (251) is turned on, the second indicator (252) is in the second indicator state.

2. The connecting device according to claim 1, characterized in that, The first unidirectional conductor (222) includes a diode.

3. The connecting device according to claim 1, characterized in that, The second control circuit (22) is also provided with a first step-down component (223), which is connected between the battery (1) and the first control component (221). The first unidirectional conductor (222) is provided between the positive terminal (11) of the battery and the first step-down component (223).

4. The connecting device according to claim 3, characterized in that, The sixth control circuit (26) is provided with a second step-down component (263), which is connected between the battery (1) and the third control component (261). The second unidirectional conductor (262) is provided between the positive terminal (11) of the battery and the second step-down component (263).

5. The connecting device according to claim 3, characterized in that, The second control circuit (22) is also provided with a voltmeter (224) and an ammeter (225). The ammeter (225) is disposed between the first unidirectional conductor (222) and the first step-down component (223). The first end of the voltmeter (224) is located between the first unidirectional conductor (222) and the ammeter (225). The second end of the voltmeter (224) is connected to the first step-down component (223).

6. The connecting device according to any one of claims 1 to 5, characterized in that, The first control circuit (21) is also provided with a manual switch (213), which is located between the positive terminal (11) of the battery and the first switching element (211).

7. The connecting device according to claim 6, characterized in that, The circuit assembly (20) further includes a seventh control circuit (27), which is connected between the first control circuit (21) and the negative terminal of the battery (12). The connection between the seventh control circuit (27) and the first control circuit (21) is located between the manual switch (213) and the first switching element (211). A third indicator (271) is provided on the seventh control circuit (27).

8. The connecting device according to claim 4 or 5, characterized in that, The housing is also provided with an instrument positive terminal (13) and an instrument negative terminal (14). The third switching element is located between the battery negative terminal and the instrument positive terminal. The circuit assembly (20) also includes an eighth control circuit (28), which is connected between the first control circuit (21) and the battery negative terminal (12). The connection point between the eighth control circuit (28) and the first control circuit (21) is located between the first switching element (211) and the first control circuit (21). Between the second control unit (212), a fourth control unit (281) is provided on the eighth control circuit (28), and a fourth switching unit (232) is also provided on the third control circuit (23). The fourth switching unit (232) is located between the negative terminal of the battery (12) and the negative terminal of the instrument (14). When the fourth control unit (281) is turned on, the fourth switching unit (232) is turned on, and when the fourth control unit (281) is turned off, the fourth switching unit (232) is turned off.

9. The connecting device according to any one of claims 1 to 5, characterized in that, The connecting device also includes a movable part (30) disposed at the bottom of the housing (10).

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