Flexible access device for high-capacity storage battery pack

Abstract

The invention relates to the technical field of electric power, in particular to a high-capacity storage battery pack flexible access device which comprises a body assembly, a built-in double-integral circuit and a range type intelligent flexible detection circuit. The voltage and the current are accurately controlled when the battery pack is connected to and separated from a main loop, sparks and arcing are avoided, and the range type intelligent flexible detection circuit is used for automatically switching high-molecular thermistors and alloy resistors with different resistance values according to working states and dynamically adjusting the resistance values so as to reduce transient current and prevent a contact from being burnt and fused; the external assembly extrudes the air bag through the clamping or loosening action of the quick connector, inert gas in the air bag is jetted to the position between the quick connector and the upper power connection end of the main loop through the gas jetting hole, and electric arcs or electric sparks possibly generated in the contact process of the part are eliminated.

Description

Technical Field

[0001] The invention relates to the field of electric power technology, and in particular to a flexible access device for a large-capacity battery pack. Background Art

[0002] Power batteries play a vital role in the DC system of the substation, mainly responsible for providing backup power and ensuring the safe operation of the power system. Under normal circumstances, the battery pack supplies power to various equipment in the substation through the connection with the main circuit; when the power grid fails, the battery pack becomes an emergency power supply to ensure that key equipment can continue to operate. Therefore, a reliable connection between the battery pack and the main circuit is crucial to the stable operation of the power system. However, the existing connection and disconnection method between the battery pack and the main circuit often adopts a direct plug-in method, which has the following major problems:

[0003] Safety hazards: During the connection and disconnection process between the battery pack and the main circuit, due to the large current, sparks, arcs and local heating are easily generated. These phenomena will not only cause the contacts to burn and melt, but may also cause larger-scale power failures, posing a major threat to the safety of the power system.

[0004] Inconvenient operation: The connection and disconnection between the large-capacity battery pack and the main circuit must be carried out strictly in accordance with the operating procedures. However, due to the limited on-site operating space, the operator may generate sparks and arcs if he is not careful when performing related operations, which poses a direct threat to personal safety. It also increases the difficulty of operation and reduces work efficiency. Summary of the invention

[0005] In view of the above-mentioned problems existing in the existing flexible access device for large-capacity storage battery packs, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a flexible access device for a large-capacity battery pack, the purpose of which is to provide a safer, more efficient and simpler connection method to meet the safety hazards existing in the process of connecting and disconnecting the battery pack and the main circuit during maintenance, and eliminate problems such as sparks, arcing, and local heating.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a large-capacity battery pack flexible access device, including a main body component, a built-in double-integral circuit and a differential intelligent flexible detection circuit, wherein the double-integral circuit is used to eliminate the component error of the circuit itself through two integrations, so as to ensure the precise control of voltage and current when the battery pack is connected to and disconnected from the main circuit, and avoid the occurrence of sparks and arcs, and the differential intelligent flexible detection circuit is used to automatically switch polymer thermistors and alloy resistors with different resistance values ​​according to the working state, and dynamically adjust the resistance value to reduce transient current and prevent contact burning and melting;

[0008] The external component includes a pair of quick connectors specially designed for high-current electricity and a 220V AC power cord. One end of the quick connector is connected to the main component and the other end is connected to the main circuit. The quick connector sprays gas during the clamping process to eliminate sparks, and the 220V AC power cord is used to power the main component.

[0009] As a preferred solution of the flexible access device for a large-capacity battery pack described in the present invention, the main body component also includes an external interface for plugging and adapting with a quick connector, a main display screen for human-computer interaction, a secondary display screen, a lithium battery pack for power supply, a lithium battery display screen, and a control switch.

[0010] As a preferred solution of the flexible access device for large-capacity battery packs described in the present invention, the dual-integral circuit adopts sealed permanent magnet arc extinguishing technology, which is suitable for a voltage range of 0 to 250V and can effectively suppress current surges during instantaneous access to the line loop.

[0011] As a preferred solution of the flexible access device for a large-capacity battery pack described in the present invention, the extreme difference intelligent flexible detection circuit is also controlled by a high-voltage DC high-power contactor, which has reliable on-off characteristics.

[0012] As a preferred solution of the flexible access device for a large-capacity battery pack of the present invention, the external interface is divided into two, one of which is a jumper port, and both are connected to the main circuit through a quick connector.

[0013] As a preferred solution of the flexible access device for a large-capacity battery pack described in the present invention, the quick connector is configured in the form of a clip, and high and low potential identification wiring is performed at the same end of the main circuit, i.e., the upper and lower ends of the fuse, according to the current direction, so that the voltmeter can collect the voltage difference between the two ends of the fuse.

[0014] As a preferred solution of the flexible access device for a large-capacity battery pack of the present invention, the quick connector is divided into a handle part and a clamp part, wherein an airbag for containing gas is arranged inside the clamp part, and a clip is arranged on the outside of the airbag, and a plurality of jet holes are arranged on the clip.

[0015] As a preferred solution of the flexible access device for a large-capacity battery pack of the present invention, the clip is used to fit the outer wall of the power connection terminal on the main circuit, and the air jet holes are symmetrically arranged along the midpoint of the length direction of the clip, and the air jet holes are configured to exhaust air outward in one direction.

[0016] As a preferred solution of the flexible access device for a large-capacity battery pack of the present invention, a cavity is separately provided in the clamping part, the airbag is located in the cavity, and a plurality of telescopic rods are provided between the cavity and the airbag.

[0017] As a preferred solution of the flexible access device for a large-capacity battery pack of the present invention, a gas-filling hole is arranged outside the clamping head part, and the gas-filling hole is connected to the airbag through a hose.

[0018] Beneficial effects of the present invention: Double-integral circuit design: A double-integral circuit is adopted to eliminate the component errors of the circuit itself through two integrations, ensuring precise control of voltage and current when the battery pack is connected to and disconnected from the main circuit, avoiding the occurrence of sparks and arcing. This design can provide stable and reliable performance under various operating conditions.

[0019] Differential intelligent flexible detection circuit: A differential intelligent flexible detection circuit has been developed, which can automatically switch between polymer thermistors and alloy resistors with different resistance values ​​according to the working state. This design can dynamically adjust the resistance value to reduce transient current, prevent contact burning and melting, and improve the safety and reliability of the access process.

[0020] Combined application of polymer thermistors and alloy resistors: Innovatively combine polymer thermistors and manganese-copper alloy resistors, using the characteristics of thermistors to reduce transient currents, and solving the problem of limited current carrying capacity of thermistors through shunting by alloy resistors. This combined application improves the carrying capacity and safety of the device.

[0021] Built-in lithium battery power supply system: The built-in lithium battery power supply system is designed to provide independent and stable power support to ensure the reliable operation of the device in various environments. The system improves the flexibility of the device, avoids the impact of external power failure on the access process, and increases the convenience of operation.

[0022] High-current clip-type quick connector design: a specially designed quick connector with an airbag containing inert gas and several jet holes connected to the airbag on the outside. The airbag is squeezed by the clamping or loosening action of the quick connector, and the inert gas in the airbag is sprayed through the jet holes to the area between the quick connector and the electrical terminal on the main circuit, eliminating the arc or spark that may be generated during the contact process, allowing operators to connect and disconnect the battery pack conveniently, quickly and reliably. The quick connector ensures the stable connection of the contact head, improves the safety and efficiency of the operation, and is suitable for on-site two-handed operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the flexible access device for a large-capacity battery pack of the present invention.

[0025] Figure 2 The figure is a schematic diagram of the overall internal circuit of the flexible access device for a large-capacity battery pack of the present invention.

[0026] Figure 3 The diagram is a partial circuit diagram of the internal human-machine interaction unit of the flexible access device for a large-capacity battery pack of the present invention.

[0027] Figure 4 The figure is a schematic diagram of the quick connector structure of the flexible access device for a large-capacity battery pack of the present invention.

[0028] Figure 5 The figure is a schematic diagram of the internal structure of the clamping head portion of the flexible access device for a large-capacity battery pack of the present invention.

[0029] Figure 6 for Figure 5 A partial enlarged schematic diagram in the middle.

[0030] Figure 7 for Figure 5 A partial enlarged schematic diagram of point B in the middle.

[0031] In the figure:

[0032] 100, main body assembly; 101, external interface; 102, main display screen; 103, auxiliary display screen; 104, lithium battery pack; 105, lithium battery display screen; 106, control switch;

[0033] 200, external component; 201, quick connector; 201a, handle part; 201b, chuck part; 201b-1, cavity; 201b-2, air bag; 201b-3, clip; 201b-4, jet hole; 201b-5, telescopic rod; 201b-6, air filling hole; 201b-7, hose; 201b-8; 202, 220V AC power cord. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0038] Example 1

[0039] Reference Figure 1 , which is the first embodiment of the present invention, provides a large-capacity battery pack flexible access device, including a main body component 100, a built-in double integration circuit and an extreme difference intelligent flexible detection circuit, wherein the double integration circuit is used to eliminate the component error of the circuit itself through two integrations to ensure accurate control of voltage and current when the battery pack is connected to and disconnected from the main circuit to avoid the occurrence of sparks and arcs, and the extreme difference intelligent flexible detection circuit is used to automatically switch polymer thermistors and alloy resistors with different resistance values ​​according to the working state, and dynamically adjust the resistance value to reduce transient current and prevent contact burning and melting; an external component 200, which includes a pair of high-current power-specific quick connectors 201 and a 220V AC power cord 202, one end of the quick connector 201 is connected to the main body component 100 and the other end is connected to the main circuit, wherein the quick connector 201 sprays gas during the clamping process to eliminate sparks, and the 220V AC power cord 202 is used to power the main body component 100.

[0040] In this embodiment: 1. Reducing transient current: adopting a differential intelligent flexible detection circuit, by switching polymer thermistors with different resistance values, the transient current is effectively reduced, sparks and arcing phenomena are reduced, and operational safety is improved.

[0041] 2. Improve current carrying capacity: Introducing manganese-copper alloy resistors as shunt devices solves the problem of polymer thermistor's carrying capacity under high current conditions, ensuring the stability and reliability of the entire system under high current conditions.

[0042] 3. Simplified operation process: The built-in lithium battery power supply system and high-current clamp-type connector are designed to enable operators to connect and disconnect the battery pack simply and quickly, improving the efficiency and convenience of maintenance work.

[0043] 4. Improve safety: Through optimized design, the voltage or current peak value of the contacts in the disconnected or connected state is limited, the possibility of spark generation is eliminated, and the safety of equipment and personnel is guaranteed.

[0044] 5. Design of high-current clip-type quick connector 201: A specially designed quick connector 201, wherein an air bag 201b-2 containing inert gas is arranged inside the quick connector 201, and a plurality of jet holes 201b-4 connected to the air bag 201b-2 are arranged on the outside. The air bag 201b-2 is squeezed by the clamping or loosening action of the quick connector 201, and the inert gas in the air bag 201b-2 is sprayed through the jet holes 201b-4 to the area between the quick connector 201 and the electrical terminal on the main circuit, thereby eliminating the arc or electric spark that may be generated during the contact process, so that the operator can connect and disconnect the battery pack conveniently, quickly and reliably. The quick connector 201 ensures the stable connection of the contact head, improves the safety and efficiency of the operation, and is suitable for on-site two-handed operation.

[0045] In summary, the device can effectively prevent safety hazards such as sparks, arcing, local heating, etc. generated during the maintenance process, reduce the occurrence of equipment failures and power outages, and improve the reliability and safety of the power system. At the same time, through the built-in lithium battery power supply system and high-current clamp-type connector design, it simplifies on-site operations, improves the work efficiency and safety of operation and maintenance personnel, and reduces the risk of personal injury caused by accidents.

[0046] Example 2

[0047] Reference Figure 1-Figure 3 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that it is to solve the potential safety hazards such as sparks, arcing, local heating, etc. generated by the battery pack and the main circuit during maintenance, and ensure the convenience and efficiency of operation. The specific design contents are as follows:

[0048] Design of external interface 101: Two external interfaces 101 are used to connect quick connectors 201 (test lines), and one of them is a jumper port. Quick connector 201 is a set of two large current clamps to ensure quick and easy operation. The design of quick connector 201 facilitates operators to quickly connect and disconnect battery packs on site, improves operating efficiency and safety, and ensures quick and easy operation. The wiring should be noted: the same end of the main circuit (i.e. the upper and lower ends of the fuse) is connected according to the current direction for high and low potential identification wiring, so that the voltmeter can collect the voltage difference between the two ends of the fuse. This design can effectively manage the wiring and ensure the accuracy, safety and simplicity of voltage measurement. Voltage value display design of secondary display screen 103: Under the judgment of the control feedback loop, the device can correctly display the voltage difference between the two ends of the fuse, provide accurate voltage measurement data, and is also used for current display, displaying the current value in the loop; temperature display, displaying the temperature rise inside the device, which is convenient for operators to perform maintenance and fault diagnosis.

[0049] Human-computer interaction module design: The device is equipped with a 800*480 resolution high-definition LCD touch screen (main display screen 102), which supports capacitive touch and gesture operation, and can intuitively display the line voltage waveform and the on / off status of the device circuit. The high-definition display and intuitive operation interface improve the user experience and facilitate operators to monitor the equipment status in real time. There are also two control switches 106, one of which is a working switch: the working power control switch 106, which controls the power supply of the circuit; the other is the start connection-test start switch, which controls the main circuit. When “|” is set, the main circuit is connected, and when “0” is set, the main circuit is disconnected.

[0050] Spark absorption and elimination circuit design: Applicable to the voltage range of 0~250V, it adopts sealed permanent magnet arc extinguishing technology to effectively suppress the current surge when the line loop is instantly connected, prevent the generation of sparks and arcs, and ensure the safety of operation.

[0051] Intelligent flexible access design: It adopts high-voltage DC high-power contactor control and has reliable on-off characteristics. When the main circuit power terminals (both ends of the fuse) are connected, they are connected in an open circuit state to prevent sparks and arcing faults at the contact ends. During operation control, the on-off operation is completed inside the device, limiting the voltage, current and power consumption between the circuits within the safe working area without interfering with other online power equipment.

[0052] Battery management: The device has a built-in large-capacity lithium battery pack 104 and is designed with a lithium battery display screen 105 with a lithium battery power display function, which is convenient for operators to understand the use status of the lithium battery in real time and ensure stable power support under different operating environments. The built-in large-capacity lithium battery provides an independent power supply for instruments and circuits, simplifies external power supply issues, saves maintenance site space, improves the safety and operating convenience of maintenance personnel, and provides independent and stable power support. The lithium battery power display design allows operators to monitor the battery status in real time, ensures stable power support under various operating environments, and improves the flexibility and adaptability of the device. An AC socket-charging interface is set on the side of the device, which is connected to a single-phase AC input (220VAC ± 10%, 50Hz) and a 220V AC power cord 202.

[0053] Software Design

[0054] System control software: Develop system control software to manage and monitor the various functions of the device, including battery power monitoring, voltage and current monitoring, circuit on / off control, spark absorption circuit management, etc. The software can collect and process various sensor data in real time to ensure the normal operation of the system.

[0055] User interface software: The intuitively designed user interface is equipped with an 800*480 resolution high-definition LCD screen, which supports capacitive touch and gesture operation. The user interface can display line voltage waveform, device circuit on / off status, battery power and other information in real time. The operation is simple and intuitive, which improves the user experience.

[0056] Data collection and processing: The software is responsible for collecting data from sensors inside the device, including voltage, current, temperature and other information, and performs real-time processing and analysis. Through algorithm processing, the software can determine the operating status of the device, provide accurate voltage, current and power consumption data, and ensure that the device operates within a safe range.

[0057] Intelligent flexible access control: The software implements intelligent control of high-voltage DC high-power contactors, dynamically adjusts the on-off state of the contactors according to real-time data, ensures that no sparks or arcs are generated during the access and disconnection process, and improves the safety and reliability of the system.

[0058] Reverse wiring buzzer indication: When abnormal wiring is detected, a sound reminder is issued to remind the operator to correct it quickly.

[0059] Specifically: Figure 2In the figure, the main circuit current flows from XT1 to XT2. Part A is a diode that has a reverse connection protection effect. Rt represents a polymer thermistor with different resistance values ​​used for switching. The thermal spark elimination circuit is connected in parallel with the main circuit to detect the shunt current. When the current abnormality is detected, the KM switch is controlled to disconnect and cut off the current to prevent the generation of sparks. The control feedback circuit is connected in parallel in the main circuit. The voltage is detected by the PV1 voltmeter to determine the selection of a polymer thermistor with a suitable resistance value. The human-computer interaction unit is also connected in parallel with the flexible detection circuit in the main circuit and has an alarm system. VD1 is a diode that has a reverse connection protection effect. R1 is a current limiting resistor to prevent excessive current. HA is a sound unit responsible for alarming when dangerous situations occur.

[0060] exist Figure 3 In the figure, U1 and U2 are AC / DC conversion modules, because the power circuit is AC while the human-machine interaction unit and the power supply are DC. PV2 provides voltage data for the voltmeter. The VD diode acts as a clamp to clamp the voltage at a specified value. GB2 is a battery-powered power supply, J is a battery-powered monitoring module, and KM is an emergency handling module. Normally, K2 is closed and K1 is open. A part of the current flows through the J module and is monitored by the J module. When an abnormal current is detected, the K1 switch is closed to prevent dangerous situations such as sparks. Most of the current flows through KM and is safely consumed and processed.

[0061] Technological innovation

[0062] Double-integral circuit design: The double-integral circuit eliminates the component error of the circuit itself through two integrations, ensuring accurate control of voltage and current when the battery pack is connected to and disconnected from the main circuit, avoiding the occurrence of sparks and arcs. This design can provide stable and reliable performance under various operating conditions.

[0063] Differential intelligent flexible detection circuit: A differential intelligent flexible detection circuit has been developed, which can automatically switch between polymer thermistors and alloy resistors with different resistance values ​​according to the working state. This design can dynamically adjust the resistance value to reduce transient current, prevent contact burning and melting, and improve the safety and reliability of the access process.

[0064] Combined application of polymer thermistors and alloy resistors: Innovatively combine polymer thermistors and manganese-copper alloy resistors, using the characteristics of thermistors to reduce transient currents, and solving the problem of limited current carrying capacity of thermistors through shunting by alloy resistors. This combined application improves the carrying capacity and safety of the device.

[0065] Built-in lithium battery power supply system: The built-in lithium battery power supply system is designed to provide independent and stable power support to ensure the reliable operation of the device in various environments. The system improves the flexibility of the device, avoids the impact of external power failure on the access process, and increases the convenience of operation.

[0066] The remaining structures are the same as those of Example 1.

[0067] Example 3

[0068] Reference Figure 1 , 4 -7 is the third embodiment of the present invention, which is different from the second embodiment in that the quick connector 201 is configured in the form of a clip, and high and low potential identification wiring is performed at the same end of the main circuit, i.e., the upper and lower ends of the fuse, according to the current direction, so that the voltmeter can collect the voltage difference at both ends of the fuse.

[0069] The quick connector 201 is divided into a handle part 201a and a chuck part 201b, wherein an air bag 201b-2 containing gas is arranged inside the chuck part 201b, and a clip 201b-3 is arranged outside the air bag 201b-2, and a plurality of air injection holes 201b-4 are arranged on the clip 201b-3. The clip 201b-3 is used to fit the outer wall of the power terminal on the main circuit, and the air injection holes 201b-4 are arranged symmetrically along the midpoint of the length direction of the clip 201b-3, and the air injection holes 201b-4 are set to exhaust air outward in one direction. A cavity 201b-1 is opened in the chuck part 201b, and the air bag 201b-2 is located in the cavity 201b-1, and a plurality of telescopic rods 201b-5 are arranged between the cavity 201b-1 and the air bag 201b-2. The airbag 201b-2 contains inert gas such as nitrogen.

[0070] The outside of the clamping part 201b is provided with a gas filling hole 201b-6, which is connected to the airbag 201b-2 through a hose 201b-7. The gas filling hole 201b-6 is an important component of the clamping part 201b of the quick connector 201, and is connected to the inside of the airbag 201b-2 through the hose 201b-7. The function of the gas filling hole 201b-6 is to allow external inert gas to enter the airbag 201b-2 when necessary to restore the inflation state of the airbag 201b-2. When the airbag 201b-2 needs to be inflated, the external air filling device can be aligned with the air filling hole 201b-6, and the air filling hole 201b-6 can be pushed inward to open, and then inert gas is injected into the airbag 201b-2 through the hose 201b-7 to fill the airbag 201b-2 again to ensure that the quick connector 201 can work normally the next time it is used and play its role in reducing the generation of arcs and sparks.

[0071] In this embodiment, the opening and clamping of the chuck portion 201b can be achieved by operating the handle portion 201a of the quick connector 201. The specific steps are as follows: First, the chuck portion 201b is opened by pinching the handle portion 201a of the quick connector 201. Subsequently, the chuck portion 201b is aligned with the outer wall of the power connection terminal on the main circuit. The handle portion 201a is released, and the chuck portion 201b is automatically clamped, so that the two clips 201b-3 clamp and fit the connection terminal. During the clamping and fitting process of the clip 201b-3, the clip 201b-3 is compressed and deformed, and is bent in the direction of the airbag 201b-2 away from the power connection terminal, thereby squeezing the airbag 201b-2. After the airbag 201b-2 is squeezed, each jet hole 201b-4 is pushed open, and then the inert gas in the airbag 201b-2 is ejected from each jet hole 201b-4 around it. Since the clip 201b-3 is bent, the positions of the jet holes 201b-4 symmetrically distributed along the midpoint direction of the clip 201b-3 after bending just surround the connecting terminal, thereby spraying inert gas to the connecting terminal in the middle, and blowing out the arc or spark that may be generated by the clip 201b-3 and the connecting terminal. As the contact area between the clip 201b-3 and the connecting terminal increases, part of the jet holes 201b-4 gradually fits to the outer wall of the connecting terminal, thereby blocking this part of the jet holes 201b-4. At this time, the remaining jet holes 201b-4 around continue to spray the remaining unfitted clip 201b-3 and the connecting terminal, and cooperate with the slow release of the handle part 201a, so that the clamp part 201b gradually or slowly contacts the connecting terminal, so that the contact pressure is gradually applied during the connection process, effectively reducing the generation of arcs and sparks. As the airbag 201b-2 contracts, the internal telescopic rods 201b-5 are also compressed, and finally the clamping piece 201b-3 completely fits with the power connection terminal to clamp it.

[0072] On the contrary, when the handle part 201a is pinched to open the clamp part 201b, the clip 201b-3 is slowly released from the outer wall of the power terminal. As the clip 201b-3 releases the power terminal, the airbag 201b-2 is released by a certain space, and then the telescopic rods 201b-5 located between the airbag 201b-2 and the cavity 201b-1 are reset and unfolded, and the airbag 201b-2 is squeezed, so that the gas in the airbag 201b-2 is further squeezed, and the airbag 201b-2 is squeezed to push open the various air injection holes 201b-4, and then the inert gas is ejected from the air injection holes 201b-4, and the clip 201b-3 and the power terminal are sprayed to eliminate the arc or electric spark that may be generated, until the clip 201b-3 is completely separated from the power terminal.

[0073] Through the above steps, this embodiment reduces or eliminates the generation of arcs and sparks by spraying inert gas during the process of the chuck clamping the electrical terminal. At the same time, during the process of loosening the chuck, the same mechanism can be used to further eliminate the arcs and sparks that may be generated, thereby improving the safety and reliability of the connection process.

[0074] The remaining structure is the same as that of Example 2.

[0075] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0076] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A flexible access device for a large-capacity battery pack, characterized in that: include, The main body component (100) has a built-in double-integral circuit and a differential intelligent flexible detection circuit, wherein the double-integral circuit is used to eliminate the component error of the circuit itself through two integrations, thereby ensuring the precise control of voltage and current when the battery pack is connected to and disconnected from the main circuit, thereby avoiding the occurrence of sparks and arcs, and the differential intelligent flexible detection circuit is used to automatically switch polymer thermistors and alloy resistors with different resistance values ​​according to the working state, dynamically adjust the resistance value, thereby reducing transient current and preventing contact burning and melting; The external component (200) comprises a pair of quick connectors (201) specially designed for large current power and a 220V AC power line (202), one end of the quick connector (201) being connected to the main component (100) and the other end being connected to the main circuit, wherein the quick connector (201) ejects gas during the clamping process to eliminate sparks, and the 220V AC power line (202) is used to supply power to the main component (100).

2. The flexible access device for a large-capacity battery pack according to claim 1 is characterized in that: The main body component (100) further comprises an external interface (101) for plugging and matching with the quick connector (201), a main display screen (102) for human-computer interaction, a secondary display screen (103), a lithium battery pack (104) for power supply, a lithium battery display screen (105), and a control switch (106).

3. The flexible access device for a large-capacity battery pack according to claim 2 is characterized in that: The double-integral circuit adopts sealed permanent magnet arc extinguishing technology, is applicable to a voltage range of 0 to 250V, and can effectively suppress current surges when a line loop is instantaneously connected.

4. The flexible access device for a large-capacity battery pack according to claim 2 is characterized in that: The extreme difference intelligent flexible detection circuit is also controlled by a high-voltage DC high-power contactor, and has reliable on-off characteristics.

5. The flexible access device for a large-capacity battery pack according to claim 2 is characterized in that: The external interface (101) is divided into two, one of which is a jumper port, and both are connected to the main circuit through the quick connector (201).

6. The flexible access device for a large-capacity battery pack according to claim 1 or 5, characterized in that: The quick connector (201) is configured in the form of a clip, and high and low potential identification wiring is performed at the same end of the main circuit, i.e., the upper and lower ends of the fuse, according to the current direction, so that the voltmeter can collect the voltage difference between the two ends of the fuse.

7. The large-capacity battery pack flexible access device according to claim 6 is characterized in that: The quick connector (201) is divided into a handle portion (201a) and a clamp portion (201b), wherein an air bag (201b-2) containing gas is arranged inside the clamp portion (201b), and a clamping piece (201b-3) is arranged outside the air bag (201b-2), and a plurality of air injection holes (201b-4) are arranged on the clamping piece (201b-3).

8. The flexible access device for a large-capacity battery pack according to claim 7 is characterized in that: The clip (201b-3) is used to fit the outer wall of the power connection terminal on the main circuit, and the air jet holes (201b-4) are symmetrically arranged along the midpoint of the length direction of the clip (201b-3), and the air jet holes (201b-4) are configured to exhaust air outward in one direction.

9. The flexible access device for a large-capacity battery pack according to claim 7 or 8, characterized in that: The clamping head portion (201b) is provided with a cavity (201b-1), the airbag (201b-2) is located in the cavity (201b-1), and a plurality of groups of telescopic rods (201b-5) are provided between the cavity (201b-1) and the airbag (201b-2).

10. The flexible access device for a large-capacity battery pack according to claim 7, characterized in that: An air filling hole (201b-6) is arranged outside the clamping head portion (201b), and the air filling hole (201b-6) is connected to the air bag (201b-2) through a hose (201b-7).

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