Connecting device

Abstract

The invention provides a connecting device which is used for being connected between a battery and an instrument, and the connecting device comprises a first control circuit and a second control circuit which are connected in parallel between a battery positive terminal and a battery negative terminal, and a third control circuit which is arranged between the battery and the instrument, a first switching piece is arranged on the first control circuit; the second control circuit is provided with a first control piece and a first one-way conduction piece, and when the first one-way conduction piece is conducted, the first control piece enables the first switching piece to be conducted; a second switching piece is arranged on the third control circuit; the first control circuit is further provided with a second control part, the second control part is connected between the first switching part and the battery cathode terminal, and when the first switching part is switched on, the second control part is switched on. According to the technical scheme, the problem that the positive electrode and the negative electrode are possibly connected reversely when the instrument is connected with the battery in the related technology is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of discharge equipment, and in particular to a connection device. Background Art

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

[0003] In the prior art, the discharge of a battery pack not only causes the temperature of the battery room to rise, which has a great impact on the operation and life of the battery pack, but also the positive and negative poles of the discharge wire are easily connected in reverse, which may damage the safety of the battery pack and the discharger equipment at the least, or even cause a battery short circuit or even a fire, resulting in personal and equipment accidents. Summary of the invention

[0004] The main purpose of the present invention is to provide a connection device to solve the problem that the positive and negative poles may be connected in reverse when the instrument is connected to the battery in the related art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a connection device for connecting between a battery and an instrument, the connection device comprising: a box body, on which a positive terminal of the battery and a negative terminal of the battery are arranged; a circuit assembly, arranged on the box body, the circuit assembly comprising a first control circuit, a second control circuit, a third control circuit and a fourth control circuit, the first control circuit and the second control circuit are arranged in parallel between the positive terminal of the battery and the negative terminal of the battery, and the third control circuit is arranged between the battery and the instrument; wherein the first control circuit is provided with a first switching element; the second control circuit is provided with a first control element and a first unidirectional conducting element, and the first unidirectional conducting element When turned on, the first control element turns on the first switching element, and when the first unidirectional conductive element is turned off, the first switching element is turned off; the third control circuit is provided with a second switching element; the first control circuit is also provided with a second control element, the second control element is connected between the first switching element and the negative terminal of the battery, when the first switching element is turned on, the second control element is turned on, and when the first switching element is turned off, the second control element is turned off; the fourth control circuit is provided with a first indicating element, the fourth control circuit is connected between the first control circuit and the negative terminal of the battery, the connection 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 turned on, the first indicating element is in a first indicating state.

[0006] Further, the first unidirectional conductive element includes a diode.

[0007] Furthermore, a first voltage reducing component is also provided on the first control circuit, the first voltage reducing component is connected between the battery and the first control component, and the first unidirectional conductive component is provided between the positive electrode terminal of the battery and the first voltage reducing component.

[0008] Furthermore, the circuit assembly also includes a fifth control circuit, which is arranged between the positive terminal of the battery and the negative terminal of the battery, and is provided with a third switching element and a second indicating element, and the third switching element is arranged between the positive terminal of the battery and the second indicating element; the circuit assembly also includes a sixth control circuit, which is arranged between the positive terminal of the battery and the negative terminal of the battery, and is provided with a third control element and a second unidirectional conducting element, the conduction direction of the second unidirectional conducting element is opposite to that of the first unidirectional conducting element, when the second unidirectional conducting element is conducted, the third control element is conducted, and the third switching element is conducted, and when the second unidirectional conducting element is disconnected, the third control element is disconnected, and the third switching element is disconnected; wherein, when the third switching element is conducted, the second indicating element is in a second indicating state.

[0009] Furthermore, a second voltage reducing component is provided on the sixth control circuit, the second voltage reducing component is connected between the battery and the third control component, and the second unidirectional conductive component is provided between the positive electrode terminal of the battery and the second voltage reducing component.

[0010] Furthermore, a voltmeter and an ammeter are also provided on the second control circuit. The ammeter is arranged between the first unidirectional conductive component and the first voltage step-down component. The first end of the voltmeter is located between the first unidirectional conductive component and the ammeter, and the second end of the voltmeter is connected to the first voltage step-down component.

[0011] Furthermore, a manual switch is also provided on the first control circuit, and the manual switch 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, and the connection between the seventh control circuit and the first control circuit is located between the manual switch and the first switching element, and the seventh control circuit is provided with a third indicator.

[0013] Furthermore, the box body is also provided with an instrument positive terminal and an instrument negative terminal, the third switching element is located between the battery negative terminal and the instrument positive terminal, the circuit assembly also includes an eighth control circuit, the eighth control circuit is connected between the first control circuit and the battery negative terminal, 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 provided with a fourth control element, the third control circuit is also provided with a fourth switching element, the fourth switching element is located between the battery negative terminal and the instrument negative terminal, when the fourth control element is turned on, the fourth switching element is turned on, and when the fourth control element is disconnected, the fourth switching element is disconnected.

[0014] Furthermore, the connecting device also includes a moving part arranged at the bottom of the box body.

[0015] According to the technical solution of the present invention, the connection device is connected between the battery and the instrument. The connection device includes a box and a circuit assembly arranged on the box, and 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 arranged between the positive terminal of the battery and the negative terminal of the battery, the second control circuit is arranged between the positive terminal of the battery and the negative terminal of the battery, the first control circuit and the second control circuit are arranged in parallel, and the third control circuit is arranged between the battery and the instrument. The first control circuit is provided with a first switching element and a second control element, and the second control element is connected between the first switching element and the negative terminal of the battery. The second control circuit is provided with a first control element and a first unidirectional conduction element. The third control circuit is provided with a second switching element. 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, and the fourth control circuit is connected to the negative terminal of the battery. The fourth control circuit is provided with a first indicator. When the first unidirectional conduction element is turned on, the first control element turns on the first switching element, and the first switching element turns on so that the second control element can be turned on, and the first indicator is in a first indication state. When the first one-way conducting member is disconnected, the first switching member is disconnected and the second control member is disconnected. Through the above-mentioned setting, when the positive terminal of the battery is connected to the positive electrode of the battery and the negative terminal of the battery is connected to the negative electrode of the battery, the first one-way conducting member can be turned on, and then the first control member can be energized, and then the first control member turns on the first switching member, and then the second control member can be energized, and then the second control member turns on the second switching member, so that a loop can be formed between the battery and the instrument to realize the flow of current. When the first switching member is turned on, the first indicator is in the first indicating state, so that a prompt can be issued to the operator, which is convenient for the operator to judge whether the second switching member is turned on. When the positive terminal of the battery is connected to the negative electrode of the battery and the negative terminal of the battery is connected to the positive electrode of the battery, the first one-way conducting member cannot be turned on, and then the first switching member is disconnected, the second control member is disconnected, and the second switching member is disconnected, and a loop cannot be formed between the battery and the instrument, avoiding the reverse connection of the positive and negative poles. Therefore, the technical solution of the present application effectively solves the problem that the positive and negative poles may be reversed when the instrument is connected to the battery in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

[0018] Figure 2 Shows Figure 1 A schematic diagram of a three-dimensional structure of a connecting device from another perspective;

[0019] Figure 3 Shows Figure 1 Schematic diagram of the principle of the connection device;

[0020] Figure 4 Shows Figure 1 Schematic diagram of the structure of the connecting device connected between the battery and the instrument.

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

[0022] 1. Battery; 2. Instrument; 10. Box; 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 conducting element; 223. First voltage reducing element; 224. Voltage meter; 225. Ammeter; 23 , third control circuit; 231, second switching element; 232, fourth switching element; 24, fourth control circuit; 241, first indicating element; 25, fifth control circuit; 251, third switching element; 252, second indicating element; 26, sixth control circuit; 261, third control element; 262, second unidirectional conducting element; 263, second voltage reducing element; 27, seventh control circuit; 271, third indicating element; 28, eighth control circuit; 281, fourth control element; 30, moving element. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0026] like Figures 1 to 4 As shown, the connection device of this embodiment is used to connect between the battery 1 and the instrument 2, and the connection device includes: a box 10 and a circuit assembly 20. The box 10 is provided with a battery positive terminal 11 and a battery negative terminal 12. The circuit assembly 20 is arranged on the box, and 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 arranged in parallel between the battery positive terminal 11 and the battery negative terminal 12, and the third control circuit 23 is arranged between the battery 1 and the instrument 2. Among them, 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, and 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 12 of the battery. 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, which 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 indication state.

[0027] By applying the technical solution of the present invention, the connection device is connected between the battery 1 and the instrument 2. The connection device includes a box 10 and a circuit assembly 20 arranged on the box 10, and 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 arranged between the positive terminal 11 of the battery and the negative terminal 12 of the battery, and the second control circuit 22 is arranged between the positive terminal 11 of the battery and the negative terminal 12 of the battery. The first control circuit 21 and the second control circuit 22 are arranged in parallel, and the third control circuit 23 is arranged between the battery 1 and the instrument 2. The first control circuit 21 is provided with a first switching element 211 and a second control element 212, and 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 conductive 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, and 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 one-way conducting element 222 is turned on, the first control element 221 turns on the first switching element 211, and the first switching element 211 turns on so that the second control element 212 can be turned on, and the first indicator 241 is in a first indicating state. When the first one-way conducting element 222 is turned off, the first switching element 211 is turned off, and the second control element 212 is turned off. Through the above-mentioned arrangement, when the positive battery terminal 11 is connected to the positive electrode of the battery 1 and the negative battery terminal 12 is connected to the negative electrode of the battery, the first unidirectional conductive member 222 can be turned on, and then the first control member 221 can be energized, and then the first control member 221 turns on the first switching member 211, and then the second control member 212 can be energized, and then the second control member 212 turns on the second switching member 231, so that a loop can be formed between the battery 1 and the instrument 2 to realize the flow of current. When the first switching member 211 is turned on, the first indicator member 241 is in the first indicating state, so that a prompt can be issued to the operator, so that the operator can judge whether the second switching member 231 is turned on. When the positive terminal 11 of the battery is connected to the negative terminal of the battery 1 and the negative terminal 12 of the battery is connected to the positive terminal of the battery 1, the first unidirectional conductive member 222 cannot be turned on, and then the first switching member 211 is disconnected, the second control member 212 is disconnected, and the second switching member 231 is disconnected, so that a loop cannot be formed between the battery 1 and the instrument 2, thereby avoiding the reverse connection of the positive and negative poles. Therefore, the technical solution of the present application effectively solves the problem of the reverse connection of the positive and negative poles when the instrument is connected to the battery in the related art.

[0028] Battery 1 is a 24V battery.

[0029] Instrument 2 is a discharge instrument.

[0030] Anti-collision strips are set around the box to protect the operator and prevent the operator from being injured when hitting the corners of the box.

[0031] like Figure 3 As shown, in this embodiment, the first unidirectional conductive member 222 includes a diode. The diode has a unidirectional conductive characteristic, which can ensure that when the battery positive terminal 11 and the battery negative terminal 12 are correctly connected, the current is conducted, and when the battery positive terminal 11 and the battery negative terminal 12 are incorrectly connected, the current cannot flow.

[0032] like Figure 3 As shown, in this embodiment, the first control circuit 21 is further provided with a first voltage reducing member 223, the first voltage reducing member 223 is connected between the battery 1 and the first control member 221, and the first unidirectional conducting member 222 is provided between the positive electrode terminal 11 of the battery and the first voltage reducing member 223. The first voltage reducing member 223 can reduce the voltage to ensure the normal operation of the first control member 221.

[0033] like Figure 3 As shown, in this embodiment, the circuit assembly 20 further includes a fifth control circuit 25, which is arranged between the battery positive terminal 11 and the battery negative terminal 12, and is provided with a third switch 251 and a second indicator 252, and the third switch 251 is arranged between the battery positive terminal 11 and the second indicator 252. The circuit assembly 20 further includes a sixth control circuit 26, which is arranged between the battery positive terminal 11 and the battery negative terminal 12, and is provided with a third control 261 and a second one-way conducting member 262, and the second one-way conducting member 262 and the first one-way conducting member 222 have opposite conducting directions, and when the second one-way conducting member 262 is conducting, the third control member 261 is conducting, and the third switch 251 is conducting, and when the second one-way conducting member 262 is disconnected, the third control member 261 is disconnected, and the third switch 251 is disconnected. Wherein, when the third switch 251 is conducting, the second indicator 252 is in the second indicating state. When the battery positive terminal 11 is connected to the negative terminal of the battery 1, and the battery negative terminal 12 is connected to the positive terminal of the battery 1, the second unidirectional conductive member 262 is turned on, and then the third control member 261 can be energized, so that the third switching member 251 can be turned on, and the second indicator member 252 can issue a prompt, so that the operator can judge that the battery positive terminal 11 and the battery negative terminal 12 are connected incorrectly. When the battery positive terminal 11 is connected to the positive terminal of the battery 1, and the battery negative terminal 12 is connected to the negative terminal of the battery 1, the second indicator member 252 will not issue a prompt, so as to avoid 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 voltage reducing member 263, the second voltage reducing member 263 is connected between the battery 1 and the third control member 261, and the second unidirectional conductive member 262 is provided between the battery positive electrode terminal 11 and the second voltage reducing member 263. The second voltage reducing member 263 can reduce the voltage to ensure the normal operation of the third control member 261.

[0036] The first voltage-reducing component 223 and the second voltage-reducing component 263 are both transformers.

[0037] The sixth control circuit 26 is also provided with a third unidirectional conductive element, which is arranged between the second voltage reducing element and the negative electrode terminal 12 of the battery.

[0038] The third unidirectional conductive element is also a diode, and the conducting direction of the third unidirectional conductive element is the same as the conducting direction of the first unidirectional conductive element.

[0039] A fourth unidirectional conductive element is also provided on the second control circuit 22 , and a third unidirectional conductive element is provided between the first voltage reducing element and the negative electrode terminal 12 of the battery.

[0040] The fourth unidirectional conductive element is also a diode, and the conducting direction of the fourth unidirectional conductive element is the same as the conducting direction 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 conductive member 222, then flows into the first voltage step-down member, and then flows out of the first voltage step-down member 223. After flowing out of the first voltage step-down member 223, it flows through the third unidirectional conductive member and then flows 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 conductive member, then flows into the second voltage reducing member 263, then flows out of the second voltage reducing member 263, flows through the second unidirectional conductive member 262, and then flows to the negative terminal 12 of the battery.

[0043] The first voltage reducing element 223 has a first input end, a first output end, a second input end, and a second output end.

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

[0045] The first control element is connected between the second input terminal and the second output terminal, so that after the current flows into the first voltage-reducing element, the first voltage-reducing element can supply power to the first control element 221 .

[0046] The second voltage reducing element 263 has a third input end, a third output end, a fourth input end, and a fourth output end.

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

[0048] The second control element is connected between the fourth input terminal and the fourth output terminal, so that after the current flows into the second voltage-reducing element, the second voltage-reducing element can supply power to the third control element 261 .

[0049] like Figure 3 As shown, in this embodiment, a voltmeter 224 and an ammeter 225 are further provided on the second control circuit 22. The ammeter 225 is provided between the first unidirectional conductive member 222 and the first voltage reducing member 223. The first end of the voltmeter 224 is located between the first unidirectional conductive member 222 and the ammeter 225, and the second end of the voltmeter 224 is connected to the first voltage reducing member 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 conductive member 222 and the first control member 221.

[0050] The second end of the voltmeter 224 is located between the first voltage reducing element 223 and the third unidirectional conducting element.

[0051] like Figure 3 As shown, in this embodiment, a manual switch 213 is further provided on the first control circuit 21, and 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 and the first switching element 211 is turned on, 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, which is connected between the first control circuit 21 and the negative terminal 12 of the battery, and 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, and 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 to prompt the operator that the connection device has been connected, so that the operator can operate cautiously and safely.

[0053] like Figure 3As shown, in this embodiment, the box is also provided with an instrument positive terminal 13 and an instrument negative terminal 14, the third switch is located between the battery negative terminal and the instrument positive terminal, the circuit assembly 20 also includes an eighth control circuit 28, the eighth control circuit 28 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 switch 211 and the second control component 212, the eighth control circuit 28 is provided with a fourth control component 281, the third control circuit 23 is further provided with a fourth switch 232, the fourth switch 232 is located between the battery negative terminal 12 and the instrument negative terminal 14, when the fourth control component 281 is turned on, the fourth switch 232 is turned on, when the fourth control component 281 is turned off, the fourth switch 232 is turned off. When the fourth control component 281 is turned on, the fourth switch 232 can be turned on, and then the battery negative terminal 12 and the instrument negative terminal 14 can be turned on, so that the flow of current is realized.

[0054] like Figure 3 As shown, in this embodiment, the connecting device further comprises a moving member 30 disposed at the bottom of the box body 10. Through the moving member 30, the connecting device can be arranged at different positions.

[0055] The moving member 30 includes a plurality of universal brake wheels.

[0056] The first indicator 241, the second indicator 252 and the third indicator 271 are all indicator lights, and 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 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 in sequence, and flows back to the negative terminal 12 of the battery.

[0059] When the current flows in the fourth control circuit 24 , it flows in from the first switching element 211 , flows through the first indicating 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 indicating element 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, 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 from the first switching element 211 , then flows 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 of this embodiment is a new type of convenient anti-mistouch discharge supporting facility. The connection device also includes a wire reel, on which a cable with a length of 5m is provided. The wire reel can select the required length according to the needs of the site, 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. At the same time, the connection device includes a positive and negative pole discrimination circuit, and an indicator light indicates that only when the positive and negative poles on the battery side are correctly connected, the connection device can be turned on. When the connection is incorrect, it cannot be turned on, avoiding the serious consequences caused by the reverse connection of the positive and negative poles. In addition, the shapes of the positive and negative poles on the discharger side and the battery side of the device are different, which avoids the reverse connection of the positive and negative poles of the discharge line from a physical level. The device is also equipped with an ammeter and a voltmeter, which can monitor the discharge current and the battery pack voltage changes in real time. The device is equipped with a manual switch 213, which can realize manual separation and closing, and is equipped with an air switch. It can automatically trip in the case of overcurrent, internal short circuit, etc., without affecting the operation of the battery pack. The device is equipped with a universal brake wheel and a handle on the outside, which is easy to carry, transport and fix.

[0066] The positive and negative electrodes on the discharge instrument side and the battery side are the battery positive terminal 11, the battery negative terminal 12, the instrument positive terminal 13 and the instrument negative terminal 14.

[0067] The appearance structures of the battery positive terminal 11, the battery negative terminal 12, the instrument positive terminal 13 and the instrument negative terminal 14 are different, which can further prevent the positive and negative poles from being connected in reverse.

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

[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 used on site, first place the device and the discharger outside the battery room, select the required length on the wire reel side according to the actual situation on site, pull it out and fix it. The wire reel has a self-locking function and can be pulled out to any length and fixed. Then connect the battery side and the discharger side. The positive and negative poles have different shapes of the plugs to prevent the positive and negative poles from being connected in reverse at the physical level. Connect the power cord of this device to the 220V external power supply, close the air switch, and turn the manual switch to the closed position. At this time, the power indicator light (yellow light) is on, check the correct wiring indicator light (green light) is on, and the wrong wiring indicator light (red light) is off. If the wiring is correct, the discharger can be operated to start discharging. During the work, the ammeter and voltmeter of this device can be observed to monitor the discharge current and battery pack voltage changes in real time. If there is an emergency, turn the manual opening and closing knob to the off position or disconnect the air switch. The air switch can automatically trip in the case of overcurrent (100A) and internal short circuit, which will not affect the operation of the battery pack. After the discharge work is completed, disconnect the air switch, turn the manual opening and closing knob to the off position, unplug the power cord, remove the wiring on the battery side and the discharger side, and retract the wire reel. The wire reel has an automatic retraction function. Pull the wire out a little more and the wire reel will automatically retract.

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

[0072] The 220V power supply is connected to the device through the power cord; the air switch can automatically trip in the event of overcurrent, internal short circuit, etc., without affecting the operation of the battery. The manual switch can manually stop the discharge in an emergency.

[0073] The instrument is a discharge instrument.

[0074] The functions that this device can achieve are as follows:

[0075] 1. A 5m long wire reel is provided. The wire reel has a self-locking function and can be pulled out to any length and fixed. The required length can be selected according to the needs of the site to enable the discharger to be placed outside the battery room for discharge and avoid the discharger affecting the temperature of the battery room. The wire reel has an automatic retraction function, which is convenient to use and easy to operate.

[0076] 2. A positive and negative pole identification circuit is provided. Only when the positive and negative poles on the battery side are connected correctly, the output discharger side inside the device can be turned on and discharge can be carried out, thus avoiding serious consequences caused by reverse connection of the positive and negative poles.

[0077] 3. With indicator lights, you can see at a glance whether the wiring is correct.

[0078] 4. The positive and negative poles of the device connected to the discharger side and the battery side have different shapes, which avoids the reverse connection of the positive and negative poles of the discharge line from a physical level, and makes up for the shortcoming that "the circuit cannot determine whether the wiring on the discharger side is correct" at a physical level.

[0079] 5. An ammeter and a voltmeter are installed to monitor the discharge current and battery pack voltage changes in real time.

[0080] 6. Equipped with a manual switch, which can be manually opened and closed, and the discharge can be manually stopped in an emergency.

[0081] 7. Equipped with 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. The exterior is equipped with universal brake wheels and handles for easy carrying, transport and fixation.

[0083] 9. The device shell is made of materials with good insulation performance and is equipped with grounding studs. The discharge wire and the non-contact surface of the connector are wrapped with materials with good insulation performance, with high safety performance.

[0084] The connection device of this embodiment not only greatly improves the safety of battery discharge, avoids personal and equipment accidents and serious consequences caused by incorrect positive and negative pole wiring, but also avoids the influence of the discharger on the battery chamber temperature, thereby improving battery performance and service life, and greatly reducing maintenance and replacement costs.

[0085] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually 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. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0087] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A connection device for connecting between a battery (1) and an instrument (2), characterized in that: The connecting device comprises: A box body (10), wherein the box body (10) is provided with a battery positive electrode terminal (11) and a battery negative electrode terminal (12); A circuit assembly (20) is arranged on the box, the circuit assembly (20) comprising 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) being arranged in parallel between the positive terminal (11) of the battery and the negative terminal (12) of the battery, and the third control circuit (23) being arranged between the battery (1) and the instrument (2); Wherein, 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 conductive element (222); when the first unidirectional conductive element (222) is turned on, the first control element (221) turns on the first switching element (211); and when the first unidirectional conductive 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), the second control element (212) being connected between the first switching element (211) and the negative electrode terminal (12) of the battery, and 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 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.

2. The connection device according to claim 1, characterized in that: The first unidirectional conductive element (222) comprises a diode.

3. The connection device according to claim 1, characterized in that: The second control circuit (22) is also provided with a first voltage reducing component (223), the first voltage reducing component (223) is connected between the battery (1) and the first control component (221), and the first unidirectional conductive component (222) is provided between the battery positive electrode terminal (11) and the first voltage reducing component (223).

4. The connection device according to claim 3, characterized in that: The circuit assembly (20) further comprises a fifth control circuit (25), the fifth control circuit (25) being arranged between the battery positive terminal (11) and the battery negative terminal (12), the fifth control circuit (25) being provided with a third switching element (251) and a second indicating element (252), the third switching element (251) being arranged between the battery positive terminal (11) and the second indicating element (252); The circuit assembly (20) further comprises a sixth control circuit (26), the sixth control circuit (26) being arranged between the battery positive terminal (11) and the battery negative terminal (12), the sixth control circuit (26) being provided with a third control element (261) and a second one-way conducting element (262), the second one-way conducting element (262) and the first one-way conducting element (222) having opposite conducting directions, when the second one-way conducting element (262) is conducting, the third control element (261) is conducting, and the third switching element (251) is conducting, when the second one-way conducting element (262) is disconnected, the third control element (261) is disconnected, and the third switching element (251) is disconnected; Wherein, when the third switching element (251) is turned on, the second indicating element (252) is in a second indicating state.

5. The connection device according to claim 4, characterized in that: The sixth control circuit (26) is provided with a second voltage reducing component (263), the second voltage reducing component (263) is connected between the battery (1) and the third control component (261), and the second unidirectional conductive component (262) is provided between the battery positive electrode terminal (11) and the second voltage reducing component (263).

6. The connection device according to claim 4, characterized in that: The second control circuit (22) is also provided with a voltmeter (224) and an ammeter (225); the ammeter (225) is provided between the first unidirectional conductive component (222) and the first voltage reducing component (223); a first end of the voltmeter (224) is located between the first unidirectional conductive component (222) and the ammeter (225); and a second end of the voltmeter (224) is connected to the first voltage reducing component (223).

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

8. The connection device according to claim 7, characterized in that The circuit assembly (20) further comprises a seventh control circuit (27), the seventh control circuit (27) being connected between the first control circuit (21) and the negative terminal (12) of the battery, the connection point between the seventh control circuit (27) and the first control circuit (21) being located between the manual switch (213) and the first switching element (211), and the seventh control circuit (27) being provided with a third indicator (271).

9. The connection device according to any one of claims 4 to 6, characterized in that: The box 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) further includes an eighth control circuit (28); the eighth control circuit (28) 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 Between 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 also provided on the third control circuit (23). The fourth switching element (232) is located between the negative terminal (12) of the battery and the negative terminal (14) of the instrument. When the fourth control element (281) is turned on, the fourth switching element (232) is turned on, and when the fourth control element (281) is turned off, the fourth switching element (232) is turned off.

10. The connection device according to any one of claims 1 to 6, characterized in that: The connecting device further comprises a moving part (30) arranged at the bottom of the box body (10).

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