Battery circuit module with reverse current prevention function

Abstract

The application relates to the technical field of electric storage devices, in particular to a battery circuit breaking module with a reverse current prevention function, which comprises a reverse prevention diode. The reverse prevention diode is connected in series in a circuit loop to prevent current backflow when the polarity of a battery is reversed. The reverse prevention diode is connected in series in a high-voltage positive electrode loop to cope with current backflow when the polarity of the battery is reversed, so as to avoid damage of rear-end electronic equipment (such as BMS and motor controllers) caused by reverse voltage impact. The battery circuit breaking module is actively cooled by a radiator to ensure the stability of long-term operation of the battery circuit breaking module. The reverse prevention diode is directly fixed to the radiator and coated with heat-conducting silicone grease, so that the heat dissipation efficiency is improved, and performance degradation caused by high temperature is avoided. The contactor, the fuse and the BMU and other modules are quickly assembled through cooperation of a bottom plate and an insulator, so that the wiring complexity is reduced, and maintenance is convenient. The BMU, the pre-charging circuit and the Hall sensor are integrated in the battery power-off unit, and the volume of the battery circuit breaking module is reduced.

Description

Technical Field

[0001] This invention relates to the field of electrical storage device technology, specifically to a battery circuit breaker module with reverse current prevention function. Background Technology

[0002] Multiple electrical control systems are incorporated into the battery pack to manage the battery assembly, such as the battery circuit breaker module. Traditional battery disconnection units (BDUs) primarily consist of high-voltage contactors, fuses, and copper busbars. Mechanical contactors control the on / off state of the high-voltage circuit, while fuses provide overcurrent protection. However, this technology suffers from the following drawbacks: lack of reverse connection protection, which can easily damage electronic equipment if the battery polarity is incorrectly connected; arcing risk, as contactors generate arcs when interrupting large currents, reducing device lifespan; response delay, as fuses require milliseconds to blow, making them unsuitable for transient short circuits; insufficient heat dissipation, as high-current components (such as diodes) lack effective heat dissipation design, making them prone to overheating and failure; and low integration, with separate layouts for modules such as the pre-charge circuit and BMU, resulting in significant space consumption.

[0003] When preventing reverse current, reverse current flow triggers a chain reaction, causing the reverse protection diode to continuously withstand abnormal current. Excessive reverse current requires the diode to withstand the impact, potentially leading to rapid overload and overheating. Therefore, quickly dissipating the heat from the reverse protection diode to prevent continuous high-temperature damage to the diode and surrounding instruments, and to prevent localized high temperatures in the battery disconnect module within a short period, is a key area for technological research and development. Summary of the Invention

[0004] The purpose of this invention is to provide a battery circuit breaker module with reverse current prevention function to solve the reverse current prevention problem of the electrical system in the new energy vehicle battery pack mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a battery circuit breaker module with reverse current prevention function, comprising a base disposed in a battery pack, a cover plate disposed above the base, a plurality of insulators fixedly connected between the base and the cover plate, a receiving space formed between the base and the cover plate, and the receiving space being provided with a negative input copper busbar, a negative output copper busbar, a positive input copper busbar, a positive busbar, a discharge copper busbar, a charging copper busbar, a charge-discharge copper busbar, a contactor copper busbar, a positive output copper busbar, a fuse, a Hall sensor, and a reverse protection diode, wherein the reverse protection diode is connected in series in the circuit loop to prevent reverse current flow when the battery polarity is reversed;

[0006] The space also contains a switching power supply, contactor, pre-charge group, charging contactor, discharging contactor and heat sink, with anti-reverse diodes fixedly installed on the heat sink;

[0007] The base has an upper BMU cover plate and a lower BMU cover plate, and the BMU is fixedly installed between the upper BMU cover plate and the lower BMU cover plate.

[0008] A low-voltage control connector and a high-voltage acquisition connector are fixed to one edge of the base. The low-voltage control connector and the high-voltage acquisition connector are used for power supply or voltage acquisition.

[0009] The two Hall sensors are respectively fixed on the negative output copper busbar and the positive input copper busbar. Both the negative input copper busbar and the negative output copper busbar are supported and limited by insulators and are simultaneously connected to the contactor.

[0010] Both the positive input copper bus and the positive busbar are limited and supported by insulators. The positive busbar is connected to the charging contactor. The fuse is fixedly connected between the positive input copper bus and the positive busbar. Both the discharge copper bus and the charging copper bus are limited and supported by insulators and are connected to the anti-reverse diode.

[0011] The contactor copper busbar is fixedly connected between the charging contactor and the discharging contactor, the charging and discharging copper busbar is fixedly connected between the anti-reverse diode and the contactor copper busbar, and the positive output copper busbar is fixedly connected between the charging copper busbar and the discharging contactor.

[0012] The heat sink has two symmetrical rows of heat sinks on the side opposite to the anti-reverse diode, and a heat storage device is arranged between the two rows of heat sinks. Both ends of the heat storage device are connected to a plate-shaped box. Each heat sink has two symmetrically distributed heat absorbers on both sides, and the heat absorbers are connected between the two plate-shaped boxes. A split drive is also fixed on the heat sink. The heat storage device and all the heat absorbers are linked together through the split drive. The heat sink has plate holes for the split drive and the plate-shaped box to pass through.

[0013] The heat absorption device includes a heat-conducting plate that contacts the heat sink for heat transfer, an insulated square groove box for limiting the range of motion of the heat-conducting plate, and soft flat tubes connected to both ends of the heat-conducting plate. The soft flat tubes are connected between the plate-shaped box and the plate cavity opened inside the heat-conducting plate. The insulated square groove box is fixed on the radiator.

[0014] The split drive includes a pressure plate, a T-shaped frame fixed at one end of the pressure plate, a side frame for limiting the movement direction of the T-shaped frame, a C-shaped spring for pushing the T-shaped frame to reset, a pressure shaft that drives on both sides of the T-shaped frame, a double-headed fan plate that is vertically fixed at one end of the pressure shaft, and a half-frame that drives on both ends of the double-headed fan plate. A row of heat-conducting plates on one side of a row of heat sinks is fixedly connected to a half-frame, and a row of heat-conducting plates on the other side of a row of heat sinks is fixedly connected to another half-frame. The C-shaped spring is fixed to the side frame, the side frame is fixed to the heat sink, and the side frame supports the pressure shaft.

[0015] The heat storage device includes an insulated tube fixedly connected between two plate-shaped boxes, and an integrated device installed on the outside of the insulated tube. The insulated tube is fixedly installed on the radiator. The heat storage device also includes an insulated corrugated tube and a heat dissipation corrugated tube disposed inside the insulated tube, and a piston insulated plate connected between the insulated corrugated tube and the heat dissipation corrugated tube. Multiple heat dissipation holes are opened on the shell of the insulated tube outside the heat dissipation corrugated tube.

[0016] The integrated device drives the piston adiabatic disc to slide in the adiabatic tube. The adiabatic tube pushes the heat dissipation bellows at one end to discharge the heat absorber stored in the heat dissipation bellows. After absorbing heat from the heat sink, the heat absorber is injected into the heat insulation bellows at the other end of the adiabatic tube.

[0017] The integrated device includes a sliding seat assembly mounted on a piston insulating plate, a lead screw for driving the sliding seat assembly to move, an upper frame for supporting the lead screw, an electromagnetic drive assembly for driving the lead screw to rotate, and a secondary drive assembly for controlling the deformation and elongation of the sliding seat assembly. The electromagnetic drive assembly also magnetically controls the secondary drive assembly. The upper frame is fixed on the insulating tube, and the insulating tube shell has a long plate hole for the sliding seat assembly to move.

[0018] The piston seat assembly includes an extension seat fixed on the piston heat insulation plate, a square recessed frame disposed between the extension seat and the press plate, a partition inserted between the extension seat and the square recessed frame, and a long straight rod that slides through a rod hole opened at one end of the partition.

[0019] The partition also slides through the plate hole opened on one side of the extension seat. Short columns are set at the four corners of one side of the square recessed frame, and the short columns slide into the column grooves opened on the extension seat. A pad is set on the other side of the square recessed frame. Plate grooves for receiving the pad of the square recessed frame are opened at both ends of the pressure plate. The lead screw passes through the threaded hole opened on the extension seat.

[0020] The auxiliary drive assembly includes a magnetically movable metal ring plate, a lightweight column fixedly connected to the metal ring plate at one end, a lightweight T-plate perpendicular to the lightweight column, a roller gear for transmission between the lightweight column and the lightweight T-plate, a U-shaped spring for pushing the lightweight T-plate to reset, and a sub-frame for supporting the main body in the auxiliary drive assembly. The sub-frame is fixed on the upper frame, and the lightweight T-plate and the long straight rod are fixedly connected.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. By connecting an anti-reverse diode in series with the high-voltage positive circuit, reverse current flow is addressed when the battery polarity is reversed, preventing damage to downstream electronic equipment (such as BMS and motor controllers) due to reverse voltage surges. Active heat dissipation via a heat sink ensures the long-term stability of the battery disconnect module. The anti-reverse diode is directly fixed to the heat sink and coated with thermal grease to improve heat dissipation efficiency and prevent performance degradation caused by high temperatures. The base plate and insulators enable rapid assembly of modules such as contactors, fuses, and BMUs, reducing wiring complexity and facilitating maintenance. The BMU, pre-charge circuit, and Hall sensor are integrated into the battery disconnect unit, reducing the size of the battery disconnect module.

[0023] 2. When the anti-reverse diode generates heat during normal operation, the heat sink can achieve basic heat dissipation. The heat absorber and the heat sink do not come into contact. If the anti-reverse diode is subjected to reverse current and generates a large amount of heat, then the multiple heat absorbers in this invention will come into contact with the heat sink to transfer heat, accelerating the absorption and transfer of heat on the heat sink. The absorbed heat will be stored in a concentrated manner. When the battery circuit breaker module finishes working, the heat sink will no longer dissipate heat, and the previously stored heat can be released. In this way, the basic heat dissipation on the heat sink will not be superimposed with the stored heat, avoiding the internal environment of the battery circuit breaker module from overheating in a short period of time. Attached Figure Description

[0024] Figure 1 This is a side view of the present invention.

[0025] Figure 2 This is a top view of the present invention.

[0026] Figure 3 This is a schematic diagram showing the location of the heat sink.

[0027] Figure 4 This is a schematic diagram of the structure of the present invention.

[0028] Figure 5 This is a schematic diagram of the base structure.

[0029] Figure 6 This is a schematic diagram of the heat sink structure.

[0030] Figure 7 This is a schematic diagram showing the location of the thermal storage device.

[0031] Figure 8 This is a schematic diagram showing the location of the anti-reverse diode.

[0032] Figure 9 This is a schematic diagram of the heat absorber structure.

[0033] Figure 10 This is a schematic diagram of the drive unit structure.

[0034] Figure 11 This is a schematic diagram showing the location of the integrated device.

[0035] Figure 12 This is a schematic diagram of an insulated corrugated pipe structure.

[0036] Figure 13 This is a schematic diagram of the integrated device structure.

[0037] Figure 14 This is a schematic diagram of the swing seat assembly.

[0038] Figure 15 This is a schematic diagram of the auxiliary drive unit structure.

[0039] Figure 16 This is a schematic diagram showing the position of the electromagnet.

[0040] Figure 17 This is a schematic diagram showing the position of the spring.

[0041] In the diagram: 1. Base; 2. Switching power supply; 3. Fuse; 4. Hall sensor; 5. Insulator; 6. Contactor; 7. Heat sink; 8. Anti-reverse diode; 9. Low-voltage control connector; 10. Pre-charge group; 11. BMU; 12. High-voltage acquisition connector; 13. Negative input copper busbar; 14. Negative output copper busbar; 15. Positive input copper busbar; 16. Positive busbar; 17. Discharge copper busbar; 18. Charging copper busbar; 19. Charging and discharging copper busbar; 20. Contactor copper busbar; 21. Positive output copper busbar; 22. Cover plate; 23. BMU upper cover plate; 24. BMU lower cover plate; 25. Press-fit nut; 26. Charging contactor; 27. Discharge contactor; 71. Heat sink; 28. Heat storage tank; 29. ​​Plate box; 30. Heat absorber; 30. Heat-conducting plate; 301. Insulating square groove box; 302. Soft flat tube; 303. Separator; 31. Press-fit long plate; 311. T-shaped bracket. 12. Side frame 313. C-type spring 314. Press shaft 315. Double-headed fan plate 316. Half frame 317. Insulated barrel 32. Integrated device 33. Insulated corrugated pipe 34. Heat dissipation corrugated pipe 35. Piston insulated plate 36. Swivel assembly 37. Outer extension seat 371. Square recessed frame 372. Partition plate 373. Long straight rod 374. Lead screw 38. Upper frame 39. Electromagnetic drive assembly 40. First plate Gear 401, First disc shaft 402, Second disc gear 403, Second disc shaft 404, Side control shaft 405, Electromagnet 406, Metal disc 407, Swivel plate 408, Spring 409, Pile 429, Door ring plate 439, Steering bar 449, Secondary drive assembly 41, Metal ring plate 411, Lightweight column 412, Lightweight T-plate 413, Roller gear 414, U-shaped spring 415, Sub-frame 416. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the technical solutions of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1 to 17 The present invention provides a technical solution: a battery circuit breaker module with reverse current prevention function, including a base 1 disposed in a battery pack, a cover plate 22 disposed above the base 1, a plurality of insulators 5 fixedly connected between the base 1 and the cover plate 22, a receiving space formed between the base 1 and the cover plate 22, and the receiving space is provided with a negative input copper busbar 13, a negative output copper busbar 14, a positive input copper busbar 15, a positive busbar 16, a discharge copper busbar 17, a charging copper busbar 18, a charge and discharge copper busbar 19, a contactor copper busbar 20, a positive output copper busbar 21, a fuse 3, a Hall sensor 4, and a reverse protection diode 8. The reverse protection diode 8 is connected in series in the circuit to prevent current backflow when the battery polarity is reversed.

[0044] The space also houses a switching power supply 2, a contactor 6, a pre-charge group 10, a charging contactor 26, a discharging contactor 27, and a heat sink 7. Below the base 1 are a BMU upper cover plate 23, a BMU lower cover plate 24, and a BMU 11 fixedly installed between the BMU upper cover plate 23 and the BMU lower cover plate 24. The BMU 11 is a battery management unit, mainly used for monitoring, controlling, and managing the battery system, and is one of the core components of the battery management system (BMS).

[0045] This invention is used in the high-voltage electrical system of new energy vehicles. It has the function of preventing reverse current. The battery circuit breaker module is installed inside the battery pack and is externally connected through the positive input copper busbar 15 and the negative input copper busbar 13. It adopts a modular integrated design. The base 1 integrates many power components, such as contactors 6 and fuses 3, and the control unit is integrated below, which further reduces the space volume and improves the space utilization. It effectively prevents the reverse current from flowing back when the battery polarity is reversed, and avoids damage to the downstream BMS and motor controller and other electronic equipment due to reverse voltage impact. It actively dissipates heat through the heat sink 7.

[0046] The base 1 and the cover plate 22 are connected by an insulator 5, and a receiving space is formed between the base 1 and the cover plate 22. The contactor, fuse and copper busbar and other devices are installed in the receiving space.

[0047] The base 1 and the insulator 5 can be disassembled and connected. The base 1 is provided with a press-fit nut 25. The contactor 6, insulator 5, heat sink 7, pre-charge resistor 10, switching power supply 2, low-voltage control connector 9 and high-voltage acquisition connector 12 are all fixedly connected to the press-fit nut 25 on the base 1 by screws. This screw fixing method greatly facilitates the connection and disassembly between components. The base 1 has a circular hole, and the circular hole is fixed to the press-fit nut 25 by interference fit. The functions of the low-voltage control connector 9 and the high-voltage acquisition connector 12 include power supply for the contactor coil drive, external power supply, and voltage acquisition connection port.

[0048] The circuit components include a negative input copper busbar 13, a negative output copper busbar 14, a positive input copper busbar 15, a positive busbar 16, a discharge copper busbar 17, a charging copper busbar 18, a charge / discharge copper busbar 19, a contactor copper busbar 20, a positive output copper busbar 21, a fuse 3, a Hall sensor 4, and a reverse protection diode 8.

[0049] The negative input copper busbar 13, negative output copper busbar 14, positive input copper busbar 15, and positive output copper busbar 21 are used for circuits other than the external battery circuit breaker module. The anti-reverse diode 8 is mounted on the heat sink 7 and coated with thermal grease. The heat sink 7 has threaded holes, and the anti-reverse diode 8 is fitted with screws to be screwed into the threaded holes on the heat sink 7. Two Hall sensors 4 are fixed on the negative output copper busbar 14 and the positive input copper busbar 15, respectively. Both the negative input copper busbar 13 and the negative output copper busbar 14 are fixedly connected to the insulator 5 and also fixedly connected to the negative contactor 6.

[0050] Both ends of the positive input copper busbar 15 are fixed to the insulator 5. The positive busbar 16 is fixed to the insulator 5 and is connected to the charging contactor 26. The fuse 3 is fixedly connected between the positive input copper busbar 15 and the positive busbar 16. The discharge copper busbar 17 and the charging copper busbar 18 are both fixed to the insulator 5 and are both connected to the anti-reverse diode 8.

[0051] The contactor copper busbar 20 is fixedly connected between the charging contactor 26 and the discharging contactor 27. The charging and discharging copper busbar 19 is fixedly connected between the anti-reverse diode 8 and the contactor copper busbar 20. The positive output copper busbar 21 is fixedly connected between the charging copper busbar 18 and the discharging contactor 27. The upper cover plate 23 and the lower cover plate 24 of the BMU are fixedly connected to the insulator 5 by screws. The BMU 11 is installed between the upper cover plate 23 and the lower cover plate 24 of the BMU.

[0052] The insulator 5 is provided with a press-fit nut 25. The fuse, copper busbar, BMU11, BMU upper cover plate 23 and BMU lower cover plate 24 are fixedly connected to the press-fit nut 25 by screws.

[0053] refer to Figure 7It is understood that the heat sink 7 has two symmetrical rows of heat sinks 71 on the side opposite to the anti-reverse diode 8, and a heat storage unit 28 is arranged between the two rows of heat sinks 71. Both ends of the heat storage unit 28 are connected to plate boxes 29. Each heat sink 71 has two symmetrically distributed heat absorbers 30 on both sides. The heat absorbers 30 are connected between the two plate boxes 29. A split drive 31 is also fixed on the heat sink 7. The heat storage unit 28 and all the heat absorbers 30 are linked through the split drive 31. The heat sink 71 has plate holes for the split drive 31 and the plate box 29 to pass through.

[0054] The heat absorber 30 includes a heat-conducting plate 301 that contacts and transfers heat to the heat sink 71, an insulated square groove box 302 that restricts the range of motion of the heat-conducting plate 301, and flexible flat tubes 303 connected to both ends of the heat-conducting plate 301. The flexible flat tubes 303 connect between the plate-shaped box 29 and the plate cavity opened inside the heat-conducting plate 301. The insulated square groove box 302 is fixed to the radiator 7. The insulated square groove box 302 has plate holes for the heat-conducting plate 301 to slide and extend. The insulated square groove box 302 has a heat insulation effect to prevent heat from leaking out of the heat-conducting plate 301. After the front of the heat-conducting plate 301 contacts the heat sink 71, the heat on the heat sink 71 is transferred to the heat-conducting plate 301 and will not leak out further through the heat-conducting plate 301, but will be transported away by the internal fluid. (Refer to...) Figure 9 Understandably, at this point, the heat-conducting plate 301 and the heat sink 71 are in contact and conducting heat. The heat-conducting plate 301 can be separated from the heat sink 71 by sliding to the left. The heat transfer between the two is greatly reduced because they are no longer in contact, which can be understood as stopping heat transfer.

[0055] The split drive unit 31 includes a pressure plate 311, a T-shaped frame 312 fixed at one end of the pressure plate 311, a side frame 313 for limiting the movement direction of the T-shaped frame 312, a C-shaped spring 314 for pushing the T-shaped frame 312 to reset, a pressure shaft 315 that drives both sides of the T-shaped frame 312, a double-headed fan plate 316 that is vertically fixed at one end of the pressure shaft 315, and a half frame 317 that drives both ends of the double-headed fan plate 316. A row of heat-conducting plates 301 on one side of a row of heat sinks 71 and a half frame 317 are fixedly connected, and a row of heat-conducting plates 301 on the other side of a row of heat sinks 71 and another half frame 317 are fixedly connected. The C-shaped spring 314 is fixed on the side frame 313, the side frame 313 is fixed on the heat sink 7, and the side frame 313 supports the pressure shaft 315.

[0056] A track is provided on the side frame 313. A section of the T-shaped frame 312 slides through an arc groove opened in the track. The firing shaft 315 is movably sleeved in a through hole opened in the side frame 313. One end of the firing shaft 315 is equipped with a shaft gear to mesh with a row of teeth at the end of the T-shaped frame 312 for transmission. Both ends of the double-headed fan plate 316 are equipped with arc-shaped racks, and the arc-shaped racks mesh with the straight racks at the end of the half frame 317 for transmission. (Reference) Figure 10As we understand it, the rising of the pressure plate 311 will drive the T-shaped frame 312. The rising of the T-shaped frame 312 will cause the pressure shafts 315 on both sides to rotate synchronously, which in turn will cause the two double-headed fan plates 316 to rotate symmetrically and synchronously. The half-frame 317 above the double-headed fan plate 316 moves to the right, driving a row of heat-conducting plates 301 to move to the right. The half-frame 317 below the double-headed fan plate 316 moves to the left, driving another row of heat-conducting plates 301 to move to the left. In this way, the heat-conducting plates 301 on both sides of the heat sink 71 come closer and clamp the heat sink 71, and begin to make contact for heat transfer. Conversely, when the pressure plate 311 descends, the heat-conducting plates 301 and the heat sink 71 stop heat transfer by separating.

[0057] The heat storage tank 28 includes an insulated tube 32 fixedly connected between two plate-shaped boxes 29, and an integrated device 33 installed outside the insulated tube 32. The insulated tube 32 is fixedly installed on the radiator 7. The heat storage tank 28 also includes an insulated corrugated tube 34 and a heat dissipation corrugated tube 35 disposed inside the insulated tube 32, and a piston insulated plate 36 connected between the insulated corrugated tube 34 and the heat dissipation corrugated tube 35. Multiple heat dissipation holes are opened on the shell of the insulated tube 32 outside the heat dissipation corrugated tube 35.

[0058] The integrated device 33 drives the piston adiabatic disc 36 to slide in the adiabatic tube 32. The adiabatic tube 32 pushes the heat dissipation bellows 35 at one end to discharge the heat absorber stored in the heat dissipation bellows 35. After absorbing the heat from the heat sink 71, the heat absorber is injected into the heat insulation bellows 34 at the other end of the adiabatic tube 32.

[0059] The insulated tube 32 has tapered ends. One end of the insulated bellows 34 is sealed by a fixedly connected piston insulated plate 36, and the other end of the insulated bellows 34 is fixedly connected to an inner convex ring inside one end of the insulated tube 32. Similarly, one end of the heat dissipation bellows 35 is sealed by a fixedly connected piston insulated plate 36, and the other end of the heat dissipation bellows 35 is fixedly connected to an inner convex ring inside the other end of the insulated tube 32. The heat absorber is a liquid that rapidly absorbs heat using existing technology. The shell of the insulated bellows 34 is an insulation material, while the heat dissipation bellows 35 is not an insulation material. The heat absorber injected into the insulated bellows 34 will keep one end warm for a period of time, while the heat absorber injected into the heat dissipation bellows 35 will dissipate heat and lower the temperature.

[0060] The reverse protection diode 8 is connected in series in the circuit to prevent reverse current flow when the battery polarity is reversed. When reverse current flow occurs, the reverse protection diode 8 heats up rapidly, and the heat is transferred to the heat sink 7 and then diffuses outward. If heat dissipation is not controlled, the local space of the battery disconnect module will overheat, which will inevitably lead to safety problems caused by high heat. If the heat sink 7 can transfer and collect a large amount of heat during excessive heat dissipation, the heat release can be reduced, so the local space around the heat sink 7 will not overheat. The transferred and collected heat can be released when the battery disconnect module stops working. As long as the battery disconnect module is working, the reverse protection diode 8 will have basic heat dissipation. It is necessary to prevent the excessive heat rise caused by the superposition of the basic heat dissipation of the reverse protection diode 8 and the heat stored in the insulation bellows 34. Therefore, after the battery pack stops supplying power and the battery disconnect module stops working, the basic heat dissipation of the reverse protection diode 8 disappears, and the heat stored in the insulation bellows 34 is released. The two heat releases are staggered, which can prevent the excessive heat rise of the local space caused by superposition.

[0061] When the reverse-current protection diode 8 is subjected to reverse current flow, it will cause the heat sink 7 to heat up. At this time, the heat absorber in the heat dissipation bellows 35 is controlled to flow into the insulation bellows 34 to achieve emergency cooling of the heat sink 7. Specifically, the piston insulation plate 36 moves to compress the heat dissipation bellows 35, squeezing out the heat absorber in the heat dissipation bellows 35. Then the heat absorber is injected into the plate box 29 at one end and flows to all the heat conduction plates 301. At the same time, all the heat conduction plates 301 and heat sinks 71 are in contact. The heat on the heat sinks 71 is transferred to the heat conduction plates 301 and absorbed by the heat absorber flowing inside the heat conduction plates 301. Then the heated heat absorber gathers into another plate box 29 and is then concentratedly injected into the insulation bellows 34. The heat in the insulation bellows 34 cannot be released quickly, thus achieving centralized storage of heat. The stored heat will not be released when the heat sink 7 is performing basic heat dissipation.

[0062] When the battery circuit breaker module stops working, the heat sink 7 no longer releases heat, and then the release of stored heat can be controlled. Especially in cold regions, the release of stored heat can maintain the internal temperature of the battery circuit breaker module and prevent the battery circuit breaker module from failing due to low temperature. Further analysis shows that when the battery circuit breaker module is in a cold environment, some of the heat absorber in the heat insulation bellows 34 can be injected into the heat dissipation bellows 35 every once in a while, which is to say, heat is released intermittently. This way, the ambient temperature of the battery circuit breaker module can be maintained. In cold regions, when the anti-reverse diode 8 is working, it dissipates heat to the outside through the heat sink 7. The heat sink 7 has basic heat dissipation. Even if there is no reverse current, the heat insulation bellows 34 can also collect and store heat, which means it collects the basic heat dissipation of the heat sink 7.

[0063] The process of storing and releasing heat in the heat-insulating corrugated pipe 34: The piston insulation plate 36 moves and presses the heat-insulating corrugated pipe 34, and the hot heat absorber in the heat-insulating corrugated pipe 34 is injected into a plate-shaped box 29, and then diffuses into all the heat-conducting plates 301. At this time, the heat-conducting plates 301 and the heat sink 71 are separated, and the heat in the heat-conducting plates 301 is directly dissipated through the front. The cooled heat absorber is gathered through another plate-shaped box 29, and then injected into the heat-dissipating corrugated pipe 35.

[0064] The integrated device 33 includes a sliding seat assembly 37 mounted on the piston adiabatic disc 36, a lead screw 38 for driving the sliding seat assembly 37 to move, an upper frame 39 for supporting the lead screw 38, an electromagnetic drive assembly 40 for driving the lead screw 38 to rotate, and a secondary drive assembly 41 for controlling the deformation and elongation of the sliding seat assembly 37. The electromagnetic drive assembly 40 also magnetically controls the secondary drive assembly 41. The upper frame 39 is fixed on the adiabatic tube 32, and the shell of the adiabatic tube 32 has a long plate hole for the sliding seat assembly 37 to move.

[0065] The piston seat assembly 37 includes an extension seat 371 fixed on the piston insulating plate 36, a square recess 372 disposed between the extension seat 371 and the press plate 311, a partition 373 inserted between the extension seat 371 and the square recess 372, and a long straight rod 374 that slides through a rod hole opened at one end of the partition 373.

[0066] The partition plate 373 also slides through the plate hole opened on one side of the extension seat 371. Short columns are provided at the four corners of one side of the square recessed frame 372, and the short columns slide into the column grooves opened on the extension seat 371. A pad is provided on the other side of the square recessed frame 372. Plate grooves for receiving the pads of the square recessed frame 372 are opened at both ends of the pressing plate 311. The lead screw 38 passes through the threaded hole opened on the extension seat 371.

[0067] The auxiliary drive assembly 41 includes a magnetically movable metal ring plate 411, a lightweight column 412 fixedly connected to the metal ring plate 411 at one end, a lightweight T-plate 413 perpendicular to the lightweight column 412, a roller gear 414 for transmission between the lightweight column 412 and the lightweight T-plate 413, a U-shaped spring piece 415 for pushing the lightweight T-plate 413 to reset, and a sub-frame 416 for supporting the main body in the auxiliary drive assembly 41. The sub-frame 416 is fixed on the upper frame 39, and the lightweight T-plate 413 is fixedly connected to the long straight rod 374. The lightweight column 412 slides through a square hole opened on the sub-frame 416, and the U-shaped spring piece 415 partially slides through another square hole opened on the sub-frame 416. The roller gear 414 is movably sleeved in a round hole opened on the sub-frame 416 by setting a roller shaft, and one end of the U-shaped spring piece 415 is fixed on the sub-frame 416.

[0068] After being magnetically attracted, the metal ring plate 411 moves horizontally, pulling the lightweight column 412. The moving lightweight column 412 drives the roller gear 414 to rotate, which in turn causes the lightweight T-plate 413 to move. The lightweight T-plate 413 drives the long straight rod 374, and the long straight rod 374 moves radially to drive the partition plate 373. The partition plate 373 is inserted between the square recess 372 and the extended seat 371, increasing the distance between the square recess 372 and the extended seat 371. This causes the entire sliding seat assembly 37 to deform and elongate. The pad on the square recess 372 and the end slot on the pressure plate 311 are engaged. The electromagnetic drive assembly 40 drives the lead screw 38 to rotate, causing the extended seat 371 to move horizontally. The piston adiabatic plate 36 and the square recessed frame 372 move synchronously. The pad on the square recessed frame 372 disengages from one end of the slot on the pressure plate 311, and at the same time, the pad pushes the pressure plate 311, causing the pressure plate 311 to rise until the square recessed frame 372 finishes moving. Then, the pad on 272 gets into the slot on the other end of the pressure plate 311, and the pressure plate 311 will fall back. This corresponds to the emergency heat absorption mentioned earlier, that is, the piston adiabatic plate 36 moves and presses the heat dissipation bellows 35 to cause the heat absorber to be transported. At the same time, the pressure plate 311 rises and causes the heat conduction plate 301 to come into contact with the heat sink 71. The transported heat absorber absorbs the heat on the heat sink 71.

[0069] After the magnetic attraction provided by the electromagnetic drive assembly 40 disappears, the previously mentioned heat dissipation is triggered, that is, the lead screw 38 automatically reverses and resets. This drives the piston insulating plate 36 through the extended seat 371. The piston insulating plate 36 moves in the reverse direction to press the heat-insulating bellows 34, and the heat-absorbing agent in the heat-insulating bellows 34 is transported in the reverse direction. At the same time, the metal ring plate 411 is no longer magnetically attracted, the U-shaped spring 415 presses the light T plate 413 to reset, and the long straight rod 374 moves radially to drive the partition plate 373. The partition plate 373 moves from the square recess 37 When the extension seat 371 is pulled out, the sliding seat assembly 37 deforms and shrinks. During the reverse translation of the extension seat 371, the pad on the square recess 372 pushes the middle section of the pressure plate 311, and the pressure plate 311 will not rise as mentioned above. As a result, the heat conduction plate 301 does not contact the heat sink 71. When the heat absorber is transported in the reverse direction through the heat conduction plate 301, the internal heat can be dissipated through the front of the heat conduction plate 301, and a heat dissipation space is left between the heat conduction plate 301 and the heat sink 71.

[0070] Further analysis of the previous paragraph: When the heat-conducting plate 301 and the heat sink 71 come into contact, the heat-conducting plate 301 absorbs heat from the heat sink 71, while the heat sink 71 dissipates heat faster because heat transfer is fastest in solids, followed by liquids, and slowest in gases. After the heat-conducting plate 301 and the heat sink 71 come into contact, it is heat transfer between solids, and the heat in the heat sink 71 is directly dissipated into the air, which is heat transfer from solid to gas. After the heat-conducting plate 301 and the heat sink 71 separate, the heat-conducting plate 301 releases heat. Based on the above logic, the heat-conducting plate 301 can be used as a third heat dissipation surface for the heat sink 71. If the anti-reverse diode 8 is aging and generates more heat during operation, rather than a concentrated large amount of heat generated during current reverse flow, then the electromagnetic drive group 40 can be controlled to perform work once every certain period of time, correspondingly controlling the alternation of heat absorption and dissipation, adding another heat dissipation surface to the heat sink 71, thereby accelerating the heat dissipation of the heat sink 71.

[0071] The electromagnetic drive assembly 40 includes a first disc gear 401, a first disc shaft 402, a second disc gear 403, a second disc shaft 404, a side control shaft 405, an electromagnet 406, a metal disc 407, a sliding plate 408, a spring 409, a post 429, a door ring plate 439, and a direction bar 449. The first disc shaft 402, the second disc shaft 404, and the side control shaft 405 are respectively movably sleeved in different through holes opened on the upper frame 39. One end of the first disc shaft 402 is equipped with a gear to mesh with a row of teeth on the sliding plate 408 for transmission, and the other end of the first disc shaft 402 is fixed to the middle of the first disc gear 401. One end of the second disc shaft 404 is equipped with a gear to... The first disc gear 401 meshes with the second disc shaft 404, and the other end of the second disc shaft 404 is fixed in the middle of the second disc gear 403. One end of the side control shaft 405 meshes with the second disc gear 403 through a gear. The side control shaft 405 is perpendicular to the bevel gear fixed at the end of the lead screw 38 through a fixed ring bevel gear. The electromagnet 406 fixed on the upper frame 39 is connected to an external control circuit. After the electromagnet 406 is energized, it magnetically attracts the metal disc 407 fixed on the sliding plate 408. The electromagnet 406 also magnetically attracts the metal ring plate 411. After the metal ring plate 411 is translated, it sticks to the electromagnet 406. The translation of the metal ring plate 411 triggers the deformation and elongation of the previously mentioned sliding seat assembly 37.

[0072] The metal disc 407 moves to drive the traveling plate 408. A directional bar 449 is fixed to one side of the traveling plate 408. A spring 409 is fitted on the directional bar 449. The spring 409 is inserted into the air column hole on the pile 429. The pile 429 is fixed on the upper frame 39. A door ring plate 439 is sealed at the air column hole of the pile 429. The metal disc 407 moves to drive the first disc shaft 402 to rotate. Then, the first disc gear 401 drives the second disc shaft 404. Next, the second disc gear 403 drives the side control shaft 405, which in turn drives the lead screw 38 to rotate. If the electromagnet 40 6. When the magnetic attraction stops, the spring 409 rebounds to control the sliding plate 408 to translate and reset. The subsequent transmission controls the final lead screw 38 to rotate in the opposite direction. Whether the sliding plate 408 moves forward or backward, it will continue for a period of time. In this way, the rotation of the lead screw 38 is controlled, and the subsequent delivery speed of the heat-absorbing agent is limited. Specifically, when the directional bar 449 extends and retracts in the air column hole of the pile 429, the air in the pile 429 can only slowly pass through the central fine hole on the door ring plate 439, thereby inhibiting the extension and retraction of the directional bar 449, and thus limiting the moving speed of the sliding plate 408.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery circuit breaker module with reverse current prevention function, characterized in that: The device includes a base disposed in the battery pack, a cover plate disposed on the top of the base, multiple insulators fixedly connected between the base and the cover plate, a receiving space formed between the base and the cover plate, and a negative input copper busbar, a negative output copper busbar, a positive input copper busbar, a positive busbar, a discharge copper busbar, a charging copper busbar, a charge-discharge copper busbar, a contactor copper busbar, a positive output copper busbar, a fuse, a Hall sensor, and a reverse protection diode. The reverse protection diode is connected in series in the circuit to prevent reverse current from flowing back when the battery polarity is reversed. The space also contains a switching power supply, contactor, pre-charge group, charging contactor, discharging contactor and heat sink, with anti-reverse diodes fixedly installed on the heat sink; The base has an upper cover plate and a lower cover plate for the BMU, and the BMU is fixedly installed between the upper cover plate and the lower cover plate. The heat sink has two symmetrical rows of heat sinks on the side opposite to the anti-reverse diode, and a heat storage device is arranged between the two rows of heat sinks. Both ends of the heat storage device are connected to a plate-shaped box. Each heat sink has two symmetrically distributed heat absorbers on both sides, and the heat absorbers are connected between the two plate-shaped boxes. A split drive is also fixed on the heat sink. The heat storage device and all the heat absorbers are linked together through the split drive. The heat sink has plate holes for the split drive and the plate-shaped box to pass through. The heat absorption device includes a heat-conducting plate that contacts the heat sink for heat transfer, an insulated square groove box for limiting the range of motion of the heat-conducting plate, and soft flat tubes connected to both ends of the heat-conducting plate. The soft flat tubes connect the plate-shaped box and the plate cavity opened inside the heat-conducting plate. The insulated square groove box is fixed on the heat sink.

2. A battery circuit breaker module with reverse current prevention function according to claim 1, characterized in that: A low-voltage control connector and a high-voltage acquisition connector are fixed to one edge of the base. The low-voltage control connector and the high-voltage acquisition connector are used for power supply or voltage acquisition.

3. A battery circuit breaker module with reverse current prevention function according to claim 1, characterized in that: The two Hall sensors are respectively fixed on the negative output copper busbar and the positive input copper busbar. Both the negative input copper busbar and the negative output copper busbar are supported and limited by insulators and are simultaneously connected to the contactor.

4. A battery circuit breaker module with reverse current prevention function according to claim 1, characterized in that: Both the positive input copper bus and the positive busbar are limited and supported by insulators. The positive busbar is connected to the charging contactor. The fuse is fixedly connected between the positive input copper bus and the positive busbar. Both the discharge copper bus and the charging copper bus are limited and supported by insulators and are connected to the anti-reverse diode.

5. A battery circuit breaker module with reverse current prevention function according to claim 1, characterized in that: The contactor copper busbar is fixedly connected between the charging contactor and the discharging contactor, the charging and discharging copper busbar is fixedly connected between the anti-reverse diode and the contactor copper busbar, and the positive output copper busbar is fixedly connected between the charging copper busbar and the discharging contactor.

6. A battery circuit breaker module with reverse current prevention function according to claim 1, characterized in that: The split drive includes a pressure plate, a T-shaped frame fixed at one end of the pressure plate, a side frame for limiting the movement direction of the T-shaped frame, a C-shaped spring for pushing the T-shaped frame to reset, a pressure shaft that drives on both sides of the T-shaped frame, a double-headed fan plate that is vertically fixed at one end of the pressure shaft, and a half-frame that drives on both ends of the double-headed fan plate. A row of heat-conducting plates on one side of a row of heat sinks is fixedly connected to a half-frame, and a row of heat-conducting plates on the other side of a row of heat sinks is fixedly connected to another half-frame. The C-shaped spring is fixed to the side frame, the side frame is fixed to the heat sink, and the side frame supports the pressure shaft.

7. A battery circuit breaker module with reverse current prevention function according to claim 6, characterized in that: The heat storage device includes an insulated tube fixedly connected between two plate-shaped boxes, and an integrated device installed on the outside of the insulated tube. The insulated tube is fixedly installed on the radiator. The heat storage device also includes an insulated corrugated tube and a heat dissipation corrugated tube disposed inside the insulated tube, and a piston insulated plate connected between the insulated corrugated tube and the heat dissipation corrugated tube. Multiple heat dissipation holes are opened on the shell of the insulated tube outside the heat dissipation corrugated tube. The integrated device drives the piston adiabatic disc to slide in the adiabatic tube. The adiabatic tube pushes the heat dissipation bellows at one end to discharge the heat absorber stored in the heat dissipation bellows. After absorbing heat from the heat sink, the heat absorber is injected into the heat insulation bellows at the other end of the adiabatic tube.

8. A battery circuit breaker module with reverse current prevention function according to claim 7, characterized in that: The integrated device includes a sliding seat assembly mounted on a piston insulating plate, a lead screw for driving the sliding seat assembly to move, an upper frame for supporting the lead screw, an electromagnetic drive assembly for driving the lead screw to rotate, and a secondary drive assembly for controlling the deformation and elongation of the sliding seat assembly. The electromagnetic drive assembly also magnetically controls the secondary drive assembly. The upper frame is fixed on the insulating tube, and the insulating tube shell has a long plate hole for the sliding seat assembly to move.

9. A battery circuit breaker module with reverse current prevention function according to claim 8, characterized in that: The piston seat assembly includes an extension seat fixed on the piston heat insulation plate, a square recessed frame disposed between the extension seat and the press plate, a partition inserted between the extension seat and the square recessed frame, and a long straight rod that slides through a rod hole opened at one end of the partition. The partition also slides through the plate hole opened on one side of the extension seat. Short columns are set at the four corners of one side of the square recessed frame, and the short columns slide into the column grooves opened on the extension seat. A pad is set on the other side of the square recessed frame. Plate grooves for receiving the pad of the square recessed frame are opened at both ends of the pressure plate. The lead screw passes through the threaded hole opened on the extension seat.

10. A battery circuit breaker module with reverse current prevention function according to claim 9, characterized in that: The auxiliary drive assembly includes a magnetically movable metal ring plate, a lightweight column fixedly connected to the metal ring plate at one end, a lightweight T-plate perpendicular to the lightweight column, a roller gear for transmission between the lightweight column and the lightweight T-plate, a U-shaped spring for pushing the lightweight T-plate to reset, and a sub-frame for supporting the main body in the auxiliary drive assembly. The sub-frame is fixed on the upper frame, and the lightweight T-plate and the long straight rod are fixedly connected.

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