A spark-proof flow guiding device

Abstract

The utility model provides a kind of anti-ignition flow guide device, belong to battery pack installation field, including external control circuit, guide drainage circuit, drainage clamp jaw, pneumatic assembly and protection component, external control circuit includes switch QF, relay KA, pneumatic assembly includes electromagnetic valve Y, one end of switch QF is connected to the one end of power supply circuit after being connected in series with the coil of relay KA, the other end of electromagnetic valve Y is connected to the other end of power supply circuit after being connected in series with the normally open contact KA11 of relay KA, drainage clamp jaw is grounded by guide drainage circuit, pneumatic assembly is connected with protection component;Drainage clamp jaw clamps the end of copper bar at the same time closing switch QF, copper bar high potential is pulled to zero, relay KA coil is electrified, electromagnetic valve Y is on circuit conduction, pneumatic assembly drives protection component to move up and away from PACK package, to make copper bar lap joint space, copper bar on drainage clamp jaw is bolted with BDU component bolt hole position lap joint, same potential lap joint will not appear ignition phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of battery pack installation technology, and in particular to an anti-sparking diversion device. Background Technology

[0002] With societal development, the demand for electric vehicles is constantly increasing, and people are paying more and more attention to lithium-ion batteries in electric vehicles. As the market changes, the safety performance requirements for PACK pack installation processes are gradually increasing. Currently, the SOC of battery cells in battery stacking modules and module housings is approximately 27%. The design of both high-voltage and low-voltage wiring harnesses has been updated and iterated. Due to the installation requirements of BDU / BMS and the connection process between high and low voltage harnesses, high-to-low voltage conversion occurs. Currently, a problem has arisen where arcing occurs during the connection of the high-voltage copper busbar of a PACK pack with the bolt holes of the BDU component. The reason for this arcing is that, to meet EMC design requirements, the DC-DC high-voltage input uses a two-stage filtering scheme. The measured capacitance on the high-voltage input side of the DC-DC port is 4.18uF, and the DC-DC high-voltage connector is inside the relay (requiring the DC-DC to operate only after the vehicle is powered off). When the module's main positive terminal is connected to the copper busbar, the capacitor charges instantaneously, causing arcing. To resolve the issue of abnormal arcing and ensure product quality, the existing technology involves disconnecting one end of the high-voltage copper busbar from the module terminal block to ensure that the high-voltage copper busbar is not energized, then connecting the other end of the high-voltage copper busbar to the bolt hole of the BDU component, and finally reconnecting one end of the high-voltage copper busbar to the module terminal block. This method is cumbersome. Utility Model Content

[0003] The technical problem to be solved by this utility model is: how to solve the problem of abnormal arcing in copper busbar overlap.

[0004] This utility model solves the above-mentioned technical problems through the following technical solution: an anti-sparking diversion device, including an external control circuit, a guiding diversion circuit, a diversion gripper, a pneumatic component and a protective component. The external control circuit includes a switch QF and a relay KA. The pneumatic component includes a solenoid valve Y. One end of the switch QF is connected in series with the coil of the relay KA and then connected to one end of the solenoid valve Y and the power supply circuit. The other end of the solenoid valve Y is connected in series with the normally open contact KA11 of the relay KA and then connected to the other end of the switch QF and the power supply circuit. The diversion gripper is grounded through the guiding diversion circuit. The pneumatic component is connected to the protective component.

[0005] Beneficial effects: The pneumatic component moves the protective component down to above the bolt holes of the BDU component in the PACK, protecting the PACK and preventing copper busbars with residual current from being directly connected to the bolt holes of the BDU component without prior current drainage. While the current drainage claws clamp the end of the copper busbar, the switch QF is closed, pulling the high potential of the copper busbar down to zero. The relay KA coil is energized, and the circuit containing the solenoid valve Y is connected. The pneumatic component moves the protective component up away from the PACK, making room for the copper busbar to connect. The copper busbar clamped on the current drainage claws is then connected to the bolt hole of the BDU component. Connecting at the same potential will not cause arcing.

[0006] Preferably, the guiding current-draining circuit includes a resistor R1, and the current-draining clamp is connected in series with the resistor R1 and then grounded.

[0007] Beneficial effects: When the current-draining claws clamp the end of the copper busbar, the copper busbar current flows into the resistor end to neutralize the current, reduce the copper busbar voltage, release the residual current on the copper busbar, and pull the high potential of the copper busbar down to zero.

[0008] Preferably, the guiding and diverting circuit further includes a resistor R2, one end of which is connected to the diverting clamp and one end of the resistor R1, and the other ends of the resistors R1 and R2 are grounded respectively.

[0009] Beneficial effect: Resistors R1 and R2 in the guiding current-draining circuit serve as backups for each other, ensuring normal current drainage.

[0010] Preferably, the external control circuit and the guiding and diversion circuit are both located in the diversion box, the diversion clamp is connected to the diversion box, the switch QF is located on the shell of the diversion box, and the other end of the resistor R1 is grounded through the shell.

[0011] Preferably, the external control circuit also includes an indicator light DS. One end of the indicator light DS is connected to one end of the power supply circuit, and the other end of the indicator light DS is connected in series with the normally open contact KA12 of the relay KA and then connected to the other end of the power supply circuit and the switch QF.

[0012] Beneficial effects: By setting an indicator light, the current-draining jaws clamp the end of the copper busbar while the switch QF is closed, the relay KA coil is energized, and the circuit where the indicator light is located is connected, which can remind the operator that the copper busbar has completed current drainage. The copper busbar can be connected to the bolt hole of the BDU component.

[0013] Preferably, the power supply circuit includes a transformer T and a circuit breaker F. The first input terminal of the transformer T is connected to the neutral wire, and the second input terminal of the transformer T is connected in series with the circuit breaker F and then connected to the live wire. The first output terminal of the transformer T serves as one end of the power supply circuit, and the second output terminal of the transformer T serves as the other end of the power supply circuit.

[0014] Preferably, the pneumatic assembly further includes a cylinder connected to the solenoid valve Y, and the protective assembly includes an isolation plate and a buffer pad. The cylinder is connected to the isolation plate, the buffer pad is located at the bottom of the isolation plate, and elastic foam is connected to the bottom of the buffer pad.

[0015] Beneficial effects: By setting up a buffer pad with elastic foam facing the bottom of the PACK, it can prevent damage to the PACK accessories caused by impact when the trolley starts suddenly; it can also play a physical isolation role, preventing operators from directly connecting copper busbars with residual current to bolt holes without diverting the current through the copper busbars.

[0016] Preferably, the pneumatic assembly further includes a fixed plate, the cylinder is located on the fixed plate, the isolation plate is fixed to the fixed plate by a guide assembly, and the top of the isolation plate is connected to the cylinder by a connecting block.

[0017] Preferably, the guide assembly includes a guide shaft and a bearing, with one end of the guide shaft passing through the bearing and connected to the top of the isolation plate, and the bearing fixed to the fixed plate.

[0018] Preferably, the device further includes a first pillar and a second pillar. The two ends of the first pillar are respectively fixed to one end of the two second pillars by connectors. The other end of the second pillar is fixedly connected to the support. The pneumatic components and the drainage box are both fixed on the first pillar.

[0019] The advantages of this utility model are as follows: This utility model can solve the problem of arcing abnormalities that occur during PACK / module copper busbar connection and at any work station. It does not require disassembling the end of the high-voltage copper busbar connected to the module terminal block. It is simple to operate and applicable to the arcing process during the installation of any PAVK module. It can eliminate safety hazards in the production process and ensure that product quality and PACK package functions meet design requirements. Attached Figure Description

[0020] Figure 1 A schematic diagram illustrating the application of the anti-sparking diversion device provided in this embodiment of the utility model;

[0021] Figure 2 A perspective view of the anti-sparking diversion device provided in an embodiment of this utility model;

[0022] Figure 3 A perspective view of the anti-sparking diversion device provided in an embodiment of this utility model;

[0023] Figure 4 Circuit diagram of the external control circuit in the anti-sparking diversion device provided in this embodiment of the utility model;

[0024] Figure 5 A circuit diagram of the guiding and diverting circuit in the anti-sparking diversion device provided in this embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the flow-guiding claw and flow-guiding box in the anti-sparking flow-guiding device provided in this embodiment of the utility model;

[0026] Figure 7 A schematic diagram of the pneumatic components and protective components in the anti-sparking diversion device provided in this embodiment of the utility model;

[0027] Figure 8 A perspective view of the fixing plate in the anti-sparking diversion device provided in an embodiment of this utility model;

[0028] Figure 9 A perspective view of the connecting block in the anti-sparking diversion device provided in an embodiment of this utility model;

[0029] Figure 10 A perspective view of the isolation plate in the anti-sparking diversion device provided in the embodiment of this utility model;

[0030] Figure 11 A perspective view of the buffer pad in the anti-sparking diversion device provided in an embodiment of this utility model;

[0031] Figure 12 A schematic diagram showing the position of the copper busbar after the copper busbar overlap is completed when the anti-sparking diversion device provided in this embodiment of the utility model is applied.

[0032] In the diagram: 10PACK, 21 drain gripper, 22 drain box, 31 cylinder, 32 fixing plate, 321 first through hole, 322 through groove, 33 connecting block, 331 first groove, 332 first mounting hole, 333 second through hole, 34 guide shaft, 35 bearing, 41 isolation plate, 42 buffer pad, 421 second groove, 422 second mounting hole, 43 elastic foam, 51 first column, 52 second column, 53 support member, 54 connector. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model are described clearly and completely below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0034] like Figures 1 to 3 As shown, this embodiment provides an anti-sparking diversion device, including an external control circuit, a guiding and diversion circuit, a diversion gripper 21, a pneumatic assembly, and a protective assembly. See [link to relevant documentation]. Figure 4 and Figure 5The external control circuit includes a switch QF and a relay KA. The pneumatic assembly includes a solenoid valve Y. One end of the switch QF is connected in series with the coil of the relay KA and then connected to one end of the solenoid valve Y and the power supply circuit. The other end of the solenoid valve Y is connected in series with the normally open contact KA11 of the relay KA and then connected to the other end of the switch QF and the power supply circuit. The flow-guiding gripper 21 is grounded through the guide flow-guiding circuit. The pneumatic assembly is connected to the protective assembly.

[0035] See Figure 5 The guiding and draining circuit includes resistors R1 and R2. One end of the draining clamp 21 is connected to one end of resistor R1 and one end of resistor R2, respectively. The other ends of resistors R1 and R2 are grounded. See also Figure 6 The external control circuit and the guiding current-draining circuit are both located in the current-draining box 22. The current-draining clamp 21 is connected to the current-draining box 22, and the switch QF is located on the shell of the current-draining box 22. The other end of the resistor R1 is grounded through the shell. In practical applications, the guiding current-draining circuit has two configuration methods: one circuit has only one resistor R1, and the other circuit includes resistors R1 and R2. When only one resistor R1 is used, the current-draining clamp 21 is connected in series with resistor R1 to the shell of the current-draining box 22 to achieve grounding. When two resistors are used, when the current-draining clamp 21 is connected to the copper busbar, the current of the copper busbar is split into two branches containing resistors R1 and R2. The current in both branches flows into the ground, and the two branches serve as backups for each other, achieving grounding. The current-draining clamp 21 is designed as a special clamp, and alligator clips can be used. Resistors R1 and R2 can be 100Ω NTC resistors. When the current-guiding clamp 21 is clamped onto the copper busbar, ensure that the high voltage of the copper busbar is tightly connected to the current-guiding clamp 21. The other end of the current-guiding clamp 21 is connected to ground. The current from the copper busbar flows along the spring contact to the resistor end to neutralize the current, reduce the voltage value of the copper busbar, and release the residual current on the copper busbar, thereby pulling the high potential of the copper busbar down to zero. At this point, the copper busbar is then connected to the bolt hole of the BDU assembly. Connecting at the same potential will prevent arcing. Resistors R1 and R2 in the current-guiding circuit are backups for each other to ensure normal current-guiding.

[0036] See also Figure 4 The external control circuit also includes an indicator light DS. One end of the indicator light DS is connected to one end of the power supply circuit, and the other end of the indicator light DS is connected in series with the normally open contact KA12 of the relay KA and then connected to the other end of the power supply circuit and the switch QF. The power supply circuit includes a transformer T and a circuit breaker F. The first input terminal of the transformer T is connected to the neutral line of the 220V power supply, and the second input terminal of the transformer T is connected in series with the circuit breaker F and then connected to the live line of the 220V power supply. The output terminal of the transformer T outputs a 24V voltage. The first output terminal of the transformer T serves as one end of the power supply circuit, and the second output terminal of the transformer T serves as the other end of the power supply circuit.

[0037] See Figure 7 The pneumatic assembly also includes a cylinder 31 connected to a solenoid valve Y. The cylinder 31 is located on a fixed plate 32. The protective assembly includes an isolation plate 41 and a buffer pad 42. The isolation plate 41 may be made of brown acrylic sheet, and the buffer pad 42 may be made of silicone material. The isolation plate 41 is fixed to the fixed plate 32 by a guide assembly. The guide assembly includes a guide shaft 34 and a bearing 35. One end of the guide shaft 34 passes through the bearing 35 and is connected to the top of the isolation plate 41. The bearing 35 is fixed to the fixed plate 32. The top of the isolation plate 41 is connected to the cylinder 31 by a connecting block 33. The buffer pad 42 is located at the bottom of the isolation plate 41, and the bottom of the buffer pad 42 is connected to an elastic foam 43.

[0038] See also Figure 2 and Figure 3 The anti-sparking diversion device also includes a first support column 51 and a second support column 52. The two ends of the first support column 51 are respectively fixed to one end of each of the two second support columns 52 via connectors 54. The two second support columns 51 are arranged in parallel, and the space between them is sufficient to accommodate the PACK package. In this embodiment, the height of the two second support columns 52 is 1.5m, and the length of the first support column 51 is 2mm, meaning the distance between the two second support columns 52 is 2mm. The other end of the second support column 52 is fixedly connected to the support member 53. The fixing plate 32 and the diversion box 22 in the pneumatic assembly are both fixed to the first support column 51.

[0039] See Figure 8 The fixing plate 32 is a rectangular plate, and a first through hole 321 is provided along the length of the fixing plate 32. In this embodiment, there are three first through holes 321. The middle first through hole 321 is used to fix and install the cylinder 31. The output end of the cylinder 31 passes through the first through hole 321 and is connected to the connecting block 33. The first through holes 321 on both sides are used to fix and install the bearings 35. The bearings 35 can be fixedly installed in the first through holes 321 by bolt assembly. The fixing plate 32 is also provided with multiple through grooves 322, which are used to fix the fixing plate 32 to the first support column 51.

[0040] See Figure 9 The connecting block 33 is a rectangular block. A first groove 331 is formed on one side of the connecting block 33, and multiple second through holes 333 are formed on the side of the connecting block 33 where the first groove is formed. See [link / reference]. Figure 10 The isolation plate 41 and the connecting block 33 have mounting holes at corresponding installation positions. The top of the isolation plate 41 is engaged with the first groove 331, and then the isolation plate 41 is fixedly installed on the connecting block 33 using a bolt assembly installed in the second through hole 333. The connecting block 33 has a first mounting hole 332 on its other side, through which the output end of the cylinder 31 is fixedly connected to the connecting block 33.

[0041] See Figure 11 The buffer pad 42 is a rectangular block with a length equal to that of the isolation plate 41. A second groove 421 is provided on the buffer pad 42, and a plurality of second mounting holes 422 are evenly spaced along the length of the buffer pad 42. A plurality of mounting holes are provided at the corresponding mounting positions of the isolation plate 41 and the buffer pad 42. The buffer pad 42 is fixed to the bottom of the isolation plate 41 by means of bolt assembly by snapping the bottom of the isolation plate 41 into the second groove 421.

[0042] Working principle: Combining Figure 1 When it is necessary to connect the copper busbars of PACK 10, the AGV trolley carries the trolley for installing high and low voltage wiring harnesses to the copper busbar tightening process. After the trolley is in place, the bolt holes of the BDU components in PACK 10 are located below the protective components, that is, the elastic foam 43 can cover the area where the bolt holes of the BDU components are located. At this time, the cylinder 31 extends and retracts to push the isolation plate 41 toward the position of the bolt holes of the BDU components until the gap between the elastic foam 43 at the bottom of the isolation plate 41 and the bolt holes of the BDU components is 5mm to 10mm. The cylinder 31 stops extending and retracting. A certain gap is maintained between the elastic foam 43 and the bolt holes of the BDU components, which can prevent the PACK accessories from being damaged by impact when the trolley suddenly starts due to the elastic foam 43 completely pressing the bolt holes.

[0043] After cylinder 31 is pressed down to the designated position, the operator removes the current-guiding jaw 21 from the first support column 51 and clamps it onto the end of the copper busbar on PACK 10. This end is the end of the copper busbar that needs to be connected to the bolt hole. After the spring mechanism of the current-guiding jaw 21 makes full contact with the copper busbar, the residual current on the copper busbar is guided to the ground terminal through the guiding current-guiding circuit, realizing the current-guiding function. After the current-guiding is completed, the potential of the end of the copper busbar is zero. Because the residual current on the copper busbar can be quickly diverted to ground when the current-draining claw 21 is clamped onto the end of the copper busbar, the switch QF on the current-draining box 22 is pressed at the same time as the current-draining claw 21 is clamped onto the end of the copper busbar. The relay KA coil is energized, and the normally open contacts KA11 and KA12 of the relay KA are both attracted. The circuit containing the solenoid valve Y and the indicator light DS is connected, the indicator light DS lights up, the cylinder 31 rises, and the elastic foam 43 moves away from the bolt hole of the BDU component, making room for the overlapping operation. At this time, the operator overlaps the copper busbar with the current-draining claw 21 with the bolt hole of the BDU component. At this time, the potential of both the copper busbar and the bolt hole of the BDU component is zero. Overlapping at the same potential will not cause arcing during the overlapping process. The installation bolts are pre-tightened, and then the bolts are tightened manually with a tightening gun. The position of the copper busbar after overlapping is as follows. Figure 12 As shown, Figure 12Position A in the middle is the last copper busbar to be installed. One end of the copper busbar is connected to the BDU component in the PACK package, and the other end of the copper busbar is connected to the terminal block of the module in the PACK package. After the connection is completed, the drain clamp 21 is manually removed, the switch QF on the drain box 22 is turned off, and the AGV trolley proceeds to the next station for transfer.

[0044] Before the copper busbar is drained, the elastic foam 43 is always positioned above the bolt holes of the BDU assembly, maintaining a certain gap between it and the bolt holes. This serves as a physical isolation mechanism, preventing operators from directly connecting the copper busbar with residual current to the bolt holes without draining the current, thus avoiding abnormal arcing.

[0045] This utility model's anti-arcing and diversion device can solve the arcing abnormalities that occur during PACK / module copper busbar connection and at any work station. It does not require disassembling the end of the high-voltage copper busbar connected to the module terminal block. It is simple to operate and applicable to any PAVK module installation process during arcing. It can eliminate safety hazards in the production process and ensure product quality and PACK package functionality to meet design requirements.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A spark-preventing diversion device, characterized in that: It includes an external control circuit, a guide flow circuit, a flow-guiding gripper, a pneumatic assembly, and a protective assembly. The external control circuit includes a switch QF and a relay KA. The pneumatic assembly includes a solenoid valve Y. One end of the switch QF is connected in series with the coil of the relay KA and then connected to one end of the power supply circuit of the solenoid valve Y. The other end of the solenoid valve Y is connected in series with the normally open contact KA11 of the relay KA and then connected to the other end of the switch QF and the power supply circuit. The flow-guiding gripper is grounded through the guide flow circuit. The pneumatic assembly is connected to the protective assembly.

2. The anti-sparking diversion device according to claim 1, characterized in that: The guiding and diversion circuit includes a resistor R1, and the diversion clamp is connected in series with the resistor R1 and then grounded.

3. The anti-sparking diversion device according to claim 2, characterized in that: The guiding and diversion circuit also includes resistor R2, one end of which is connected to the diversion clamp and one end of resistor R1, while the other ends of resistors R1 and R2 are grounded respectively.

4. The anti-sparking diversion device according to claim 3, characterized in that: The external control circuit and the guiding and drainage circuit are both located in the drainage box. The drainage clamp is connected to the drainage box. The switch QF is located on the shell of the drainage box. The other end of the resistor R1 is grounded through the shell.

5. The anti-sparking diversion device according to claim 1, characterized in that: The external control circuit also includes an indicator light DS. One end of the indicator light DS is connected to one end of the power supply circuit, and the other end of the indicator light DS is connected in series with the normally open contact KA12 of the relay KA and then connected to the other end of the power supply circuit and the switch QF.

6. The anti-sparking diversion device according to claim 5, characterized in that: The power supply circuit includes a transformer T and a circuit breaker F. The first input terminal of the transformer T is connected to the neutral wire, and the second input terminal of the transformer T is connected to the live wire after being connected in series with the circuit breaker F. The first output terminal of the transformer T serves as one end of the power supply circuit, and the second output terminal of the transformer T serves as the other end of the power supply circuit.

7. The anti-sparking diversion device according to claim 1, characterized in that: The pneumatic assembly also includes a cylinder connected to the solenoid valve Y, and the protective assembly includes an isolation plate and a buffer pad. The cylinder is connected to the isolation plate, the buffer pad is located at the bottom of the isolation plate, and elastic foam is connected to the bottom of the buffer pad.

8. The anti-sparking diversion device according to claim 7, characterized in that: The pneumatic assembly also includes a fixed plate, on which the cylinder is located, and an isolation plate is fixed to the fixed plate by a guide assembly. The top of the isolation plate is connected to the cylinder by a connecting block.

9. The anti-sparking diversion device according to claim 8, characterized in that: The guide assembly includes a guide shaft and a bearing. One end of the guide shaft passes through the bearing and is connected to the top of the isolation plate. The bearing is fixed to the fixed plate.

10. The anti-sparking diversion device according to claim 4, characterized in that: The device also includes a first pillar and a second pillar. The two ends of the first pillar are respectively fixed to one end of the two second pillars by connectors. The other end of the second pillar is fixedly connected to the support. The pneumatic components and the drainage box are both fixed on the first pillar.

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