A dual-channel signal recognition lithium battery charger with backup function

Abstract

The present invention discloses a dual-channel signal recognition lithium battery charger with a backup function, and relates to the technical field of chargers. The dual-channel signal recognition lithium battery charger with a backup function comprises a shell, and also comprises: an assembly slot shell, the assembly slot shell is located in the shell, and a side of the assembly slot shell is provided with a reserved opening, and the assembly slot shell is used to accommodate a lithium battery to be charged; and a backup battery, the backup battery is located in the shell, and the backup battery is used as a backup to charge the lithium battery; and an inner cover, the inner cover is located on one side of the reserved opening of the assembly slot shell, and an air bag is provided in the inner cover, and an inert gas and dry powder fire extinguishing material are provided in the air bag; the dual-channel signal recognition lithium battery charger with a backup function is provided with a backup battery to ensure that the device can charge the lithium battery in the case of a power outage; in the case of a fire of the lithium battery during charging, the extrusion assembly squeezes the air bag, and the dry powder and the inert gas shell extinguish the fire of the lithium battery to prevent the fire from spreading.

Description

Technical Field

[0001] The invention relates to the technical field of chargers, in particular to a lithium battery charger with dual-path signal recognition and a backup function. Background Art

[0002] Currently, chargers on the market generally can only charge one battery at a time. When multiple batteries need to be charged at the same time, the waiting time is long and the efficiency is low. When multiple chargers are used at the same time, the chargers are troublesome to carry. For this reason, a lithium battery charger is proposed in the patent with publication number CN204681132U, which uses no less than two power input sockets to ensure that multiple batteries can be charged at the same time and realize dual-channel signal recognition. However, this type of dual-channel charger still has the following defects, such as the inability to charge the lithium battery when the city power is cut off and the inability to prevent the fire when the lithium battery catches fire. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a dual-channel signal recognition lithium battery charger with a backup function, which solves the problem that the lithium battery can no longer be charged when the city power is cut off and the fire cannot be prevented when the lithium battery catches fire.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dual-channel signal recognition lithium battery charger with backup function, comprising an outer shell, and also comprising: an assembly slot shell, the assembly slot shell is located in the outer shell, and a reserved opening is provided on one side of the assembly slot shell, and the assembly slot shell is used to accommodate a lithium battery to be charged; and a backup battery, the backup battery is located in the outer shell, and the backup battery is used as a backup to charge the lithium battery; and an inner cover, the inner cover is located on one side of the reserved opening of the assembly slot shell, and an airbag is provided in the inner cover, inert gas and dry powder fire extinguishing material are provided in the airbag, and an extrusion component for extruding the airbag is provided in the inner cover, the extrusion component is used to generate pressure loss on the airbag, so that the dry powder and inert gas in the airbag enter the assembly slot shell from the reserved opening to extinguish the lithium battery.

[0005] Furthermore, one end of the assembly groove shell is formed as a closed end by the outer shell, and the other end of the assembly groove shell is an open end, a fireproof cloth is fixedly provided on the upper side of the outer shell close to the open end, and a raised shell is provided on the side of the outer shell close to the open end of the assembly groove shell at a position opposite to the fireproof cloth, and the fireproof cloth is accommodated in the raised shell; a cloth pulling assembly is provided on the upper side of the outer shell close to the fireproof cloth, and the cloth pulling assembly is used to unfold the fireproof cloth so that the fireproof cloth blocks the open end.

[0006] Furthermore, a pressure plate is installed on the side of the power output end of the extrusion assembly close to the airbag, and the extrusion assembly squeezes the airbag by pushing the pressure plate; the cloth pulling assembly includes a push rod fixed to the side of the pressure plate close to the airbag, a gear rod installed at the other end of the push rod, a driving gear meshed under the gear rod, a driven gear meshed under the driving gear and a pull rod one end of which is coaxial with the driven gear, and the pull rod is fixedly connected to the lower side of the fireproof cloth.

[0007] Furthermore, a thin layer is provided on one side of the airbag close to the reserved opening, and when the airbag is squeezed, the thin layer is damaged by the inert gas pressure, so that the inert gas and dry powder fire extinguishing material enter the assembly groove shell from the position where the thin layer is damaged; a positioning plate is fixedly provided on one side of the airbag away from the mechanical cavity, and the positioning plate is fixedly connected to the inner cover by bolts.

[0008] Furthermore, the device also includes a driving structure, which is used to drive the extrusion assembly to work; the lithium battery charger also includes a smoke detection sensor and a controller, the smoke detection sensor is installed on a side of the assembly slot shell close to the reserved opening, and the smoke detection sensor is used to detect smoke and transmit a signal to the controller, and the controller controls the driving structure to work.

[0009] Furthermore, the inner cover is divided into three chambers along the connecting line direction of the two assembly groove shells. The middle chamber is a mechanical chamber for accommodating the driving structure and the extrusion assembly, and the chambers on both sides are fire extinguishing chambers for accommodating airbags; the pressure plate is located in the fire extinguishing chamber.

[0010] Furthermore, the extrusion assembly includes a first extrusion assembly, which includes a bidirectional screw located in the middle of the mechanical cavity and an internal threaded barrel threadedly connected to both ends of the bidirectional screw, and the other end of the internal threaded barrel is fixedly connected to the pressure plate; the driving structure is used to drive the bidirectional screw to rotate so that threaded force is generated between the internal threaded barrel and the bidirectional screw; a guide sleeve is provided in the mechanical cavity, and the guide sleeve is arranged on the outside of the internal threaded barrel to limit the circumferential rotation of the internal threaded barrel.

[0011] Furthermore, the extrusion assembly includes a second extrusion assembly, which includes a thrust gear arranged in the middle of the mechanical cavity and a thrust rack rod meshed with both sides of the thrust gear, and one end of the thrust rack rod is fixedly connected to the pressure plate.

[0012] Furthermore, a positive electrode assembly is provided at one end of the assembly tank shell close to the open end, and a negative electrode assembly is provided at the other end of the assembly tank shell, the negative electrode of the lithium battery is electrically connected to the negative electrode assembly, and the positive electrode of the lithium battery is connected to the positive electrode assembly.

[0013] Furthermore, the positive electrode assembly includes a rocker arm, one end of which is fixed with a positive electrode sheet, the positive electrode sheet is located at the center of the assembly slot shell, and the other end of the rocker arm is rotatably installed on the side of the assembly slot shell away from the reserved opening through a rotating shaft; the negative electrode assembly includes a bracket and a negative electrode sheet installed on the bracket opposite to the rocker arm, and the bracket can move along the axial direction of the assembly slot shell so that the negative electrode sheet can adapt to lithium batteries of different lengths.

[0014] The present invention has the following beneficial effects:

[0015] (1) The dual-channel signal recognition lithium battery charger with backup function is provided with a backup battery. When the external power supply is cut off, the backup battery charges the lithium battery to ensure that the device can also charge the lithium battery in the case of power outage.

[0016] (2) The dual-channel signal recognition lithium battery charger with backup function is provided with an airbag and a squeezing assembly. When a lithium battery catches fire during charging, the squeezing assembly squeezes the airbag to cause pressure damage to the airbag. The compressed airbag will be damaged, so that the dry powder and inert gas in the airbag will be sprayed out from the damaged position to the reserved opening and then enter the assembly slot shell. The dry powder and inert gas shell will extinguish the fire of the lithium battery to prevent the fire from spreading.

[0017] (3) The dual-channel signal recognition lithium battery charger with backup function has a thin layer on one side of the airbag near the reserved opening. When the thin layer is squeezed, it will be damaged first by the pressure of the inert gas due to its thinness. This can increase the strength of the airbag itself and ensure that the thin layer is not damaged when squeezed.

[0018] (4) The dual-channel signal recognition lithium battery charger with backup function is provided with a fireproof cloth. In addition to squeezing the airbag, the extrusion component can also serve as the power of the cloth pulling component. Then, when the lithium battery catches fire, the cloth pulling component can pull the fireproof cloth, thereby pulling the lower end of the fireproof cloth downward, so that the lower end of the fireproof cloth is downwardly separated from the protruding shell, and then the fireproof cloth can cover and block the opening end, so that the lithium battery is isolated from the external environment at the position of the opening end through the fireproof cloth, preventing the flame from spreading outward from the opening end.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an appearance diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0022] Figure 3 For the present invention Figure 2Schematic diagram of the structure without fireproof cloth installed;

[0023] Figure 4 An exploded view of the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of the inner cover in the first embodiment of the present invention;

[0025] Figure 6 A bottom perspective view of the airbag of the present invention;

[0026] Figure 7 It is a schematic structural diagram of the connection diagram between the first extrusion assembly and the driving structure of the present invention;

[0027] Figure 8 is an exploded view of the first extrusion assembly of the present invention;

[0028] Fig. 9 It is a schematic diagram of the structure of the tank shell assembly of the present invention;

[0029] Fig.10 It is a schematic diagram of the installation of the negative electrode assembly of the present invention;

[0030] Fig.11 It is a schematic structural diagram of the positive electrode assembly of the present invention;

[0031] Fig.12 Schematic diagram of the internal structure of the inner cover in the second embodiment of the present invention.

[0032] In the figure, 1, display screen; 2, power plug; 3, shell; 4, assembly tank shell; 5, positive electrode assembly; 51, rocker arm; 52, rotating shaft; 53, positive electrode sheet; 6, second extrusion assembly; 61, thrust gear; 62, thrust rack rod; 7, first extrusion assembly; 71, internal threaded cylinder; 72, guide sleeve; 73, bidirectional screw rod; 8, negative electrode assembly; 81, negative electrode sheet; 82, bracket; 83, spring; 84, guide rod; 9, pull assembly; 91, pull rod; 92 , gear rod; 93, driven gear; 94, driving gear; 95, push rod; 10, fireproof cloth; 11, PCB board; 12, inner cover; 121, fire extinguishing chamber; 122, mechanical chamber; 13, positioning seat; 14, airbag; 141, thin layer; 142, positioning plate; 15, guide groove; 16, spare battery; 17, driving structure; 171, motor; 172, driving wheel; 173, belt; 174, driven wheel; 18, pressure plate; 19, smoke detection sensor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] See also Figure 1 As shown, an embodiment of the present invention provides a technical solution: a dual-channel signal recognition lithium battery charger with a backup function, comprising a housing 3, and also comprising an assembly slot shell 4 for accommodating a lithium battery to be charged, and the assembly slot shell 4 is assembled in the housing 3.

[0036] Here, one, two or more assembly slot shells 4 can be provided. When two are provided, dual-channel charging is realized, and two lithium batteries can be charged simultaneously. Moreover, the two or more assembly slot shells 4 should be an integrated structure, and the assembly slot shells 4 are preferably injection molded.

[0037] In addition, for the assembly of the assembly slot shell 4, embedding grooves integrated with the outer shell 3 are set on both sides of the inner wall of the outer shell 3. By inserting the two sides of the assembly slot shell 4 into the embedding grooves, the position of the assembly slot shell 4 can be locked. It is best to install screws between the embedding grooves and the assembly slot shell 4 to further lock the position of the assembly slot shell 4.

[0038] Optionally, the diameters of the various assembly slot shells 4 mentioned here may be the same or different. When the diameters are different, different assembly slot shells 4 may accommodate lithium batteries of different diameters to charge lithium batteries of different models.

[0039] like Figure 2The charger should also include a backup battery 16, which is located in the housing 3, and the backup battery 16 is used as a backup to charge the lithium battery when the external power supply is cut off; in fact, the charger also includes a power plug 2 and a PCB board 11. After the power plug 2 is inserted into the mains, the lithium battery is charged through the PCB board 11. A detection sensor for detecting the voltage of the backup battery 16 should also be provided. When the voltage of the backup battery 16 is too low (i.e., the power is low), the external power supply (mains) will charge the backup battery 16 in addition to charging the lithium battery. When the external power supply is cut off, the backup battery 16 charges the lithium battery to ensure that the device can also charge the lithium battery in the event of a power outage.

[0040] Combination Figure 3 - Figure 5 As shown, various factors may cause the lithium battery to catch fire when the lithium battery is charging, so a fire extinguishing mechanism is provided here, that is, a reserved opening is provided on one side of the assembly slot shell 4, and the reserved opening is preferably located above the assembly slot shell 4, and an inner cover 12 is also provided, the inner cover 12 is located on one side of the reserved opening of the assembly slot shell 4, and an airbag 14 is provided in the inner cover 12, and an inert gas and dry powder fire extinguishing material are provided in the airbag 14, and an extrusion component for extruding the airbag 14 is provided in the inner cover 12, when the extrusion component squeezes the airbag 14, it can cause pressure loss to the airbag 14, and the airbag 14 after the pressure loss will be damaged, so that the dry powder and inert gas in the airbag 14 enter the reserved opening from the damaged position, and then enter the assembly slot shell 4, so that the dry powder and the inert gas shell extinguish the fire of the lithium battery to prevent the fire from spreading.

[0041] like Figure 1 In order to conveniently insert the lithium battery into the interior of the assembly slot shell 4, one end of the assembly slot shell 4 is an open end, so that the lithium battery shell is inserted into the interior of the assembly slot shell slot 4 from the open end, and one end of the assembly slot shell 4 is formed into a sealed end by the outer shell 3 to seal the inserted lithium battery.

[0042] like Figure 1 - Figure 3 As shown, in order to further prevent the spread of fire, that is, to prevent the flame from spreading outward from the opening end, a fireproof cloth 10 is fixedly provided above the side of the outer shell 3 close to the opening end, and a protruding shell is provided on the side of the outer shell 3 close to the opening end of the assembly groove shell 4 at a position opposite to the fireproof cloth 10, and the fireproof cloth 10 is accommodated in the protruding shell; a cloth pulling assembly 9 is provided on the upper side of the outer shell 3 close to the fireproof cloth 10.

[0043] In this embodiment, when the lithium battery catches fire, the cloth pulling assembly 9 can pull the fireproof cloth 10, thereby pulling the lower end of the fireproof cloth 10 downward, so that the lower end of the fireproof cloth 10 is downwardly separated from the raised shell, and then the fireproof cloth 10 can cover and seal the opening end, thereby isolating the lithium battery from the external environment through the fireproof cloth 10 at the position of the opening end, preventing the flame from spreading outward from the opening end.

[0044] Optionally, the fireproof cloth 10 is silicone rubber coated glass fiber cloth, basalt fiber fireproof cloth, acrylic cotton fiber fireproof cloth, SM fireproof cloth, blue glass fiber fireproof cloth or aluminum foil fireproof cloth.

[0045] Combination Figure 5 and Figure 6 As shown, in order to facilitate the extrusion of the airbag 14, a pressure plate 18 is installed on the side of the power output end of the extrusion assembly close to the airbag 14. The extrusion assembly pushes the pressure plate 18 to squeeze the airbag 14, thereby expanding the extrusion area, which is more conducive to the pressure plate 18 to produce uniform pressure loss.

[0046] The cloth pulling assembly 9 mentioned above includes a push rod 95 fixed to the side of the pressure plate 18 close to the airbag 14, a gear rod 92 installed at the other end of the push rod 95, a driving gear 94 meshed under the gear rod 92, a driven gear 93 meshed under the driving gear 94, and a pull rod 91 one end of which is coaxial with the driven gear 93, and the pull rod 91 is fixedly connected to the lower side of the fireproof cloth 10.

[0047] In this embodiment, when the pressure plate 18 squeezes the airbag 14, the pressure plate 18 can be displaced, thereby pushing the push rod 95 and the gear rod 92, so that the gear rod 92 can drive the driving gear 94 to rotate. Figure 2 Counterclockwise rotation is generated from the perspective shown, so that the driven gear 93 can generate clockwise rotation, and its clockwise rotation can drive the pull rod 91 to rotate clockwise, and then the pull rod 91 shell pulls the fireproof cloth 10 when rotating, so that the fireproof cloth 10 can cover the opening end.

[0048] Preferably, the fireproof cloth 10 is preferably a fan-shaped structure to adapt to the movement trajectory of the pull rod 91.

[0049] like Figure 6 In order to ensure the strength of the airbag 14 and avoid the self-explosion of the airbag 14, the airbag 14 is preferably made of polyimide fiber, polyester fiber or polypropylene fiber, so as to ensure the self-strength of the airbag 14. However, in this case, it will be difficult for the airbag 14 to produce pressure loss when it is squeezed by the pressure plate 18, which will cause the dry powder and inert gas to be unable to be discharged. Therefore, a thin layer 141 is provided on the side of the airbag 14 close to the reserved opening. When the thin layer 141 is squeezed, it will be damaged first by the pressure of the inert gas due to its thin texture, so that the inert gas and the dry powder fire extinguishing material can enter the assembly slot shell 4 from the damaged position of the thin layer 141 to perform fire extinguishing operations.

[0050] Optionally, the material of the thin layer 141 is polytetrafluoroethylene or rubber, which may be damaged under high air pressure.

[0051] Preferably, when preparing the airbag 14, a plurality of through holes are actually first opened on the airbag 14, and a thin layer 141 is bonded to the airbag 14 by an adhesive to cover the through holes, and the diameter of the thin layer 141 is larger than the diameter of the through holes to facilitate the bonding operation of the thin layer 141.

[0052] In addition, in order to facilitate the installation of the airbag 14 , a positioning plate 142 is fixedly provided on a side of the airbag 14 away from the mechanical cavity 122 , and the positioning plate 142 is fixedly connected to the inner cover 12 by bolts.

[0053] Combination Figure 5 The device also includes a driving structure 17, which is used to drive the extrusion component to work.

[0054] The device also includes a smoke detection sensor 19 and a controller. The smoke detection sensor 19 is installed on one side of the assembly slot shell 4 close to the reserved opening, and the smoke detection sensor 19 is used to detect smoke and transmit the signal to the controller. The controller controls the drive structure 17 to work so that the device can detect smoke and respond before a fire occurs.

[0055] like Figure 5 As shown, the inner cover 12 is divided into three chambers along the connecting line direction of the two assembly slot shells 4. The middle chamber is a mechanical chamber 122 for accommodating the drive structure 17 and the extrusion assembly, and the chambers on both sides are fire extinguishing chambers 121 for accommodating the airbag 14. The fire extinguishing chamber 121 is preferably a closed chamber except for an opening at a position opposite to the reserved opening below, thereby ensuring that the inert gas and dry powder inside the airbag 14 can completely enter the interior of the assembly slot shell 4 after the airbag 14 is damaged; preferably, the pressure plate 18 is located in the fire extinguishing chamber 121 to facilitate the pressure plate 18 to squeeze the airbag 14.

[0056] The extrusion assembly mentioned above includes a first extrusion assembly 7, which includes a bidirectional screw 73 located in the middle of the mechanical cavity 122 and an internal threaded barrel 71 threadedly connected to both ends of the bidirectional screw 73. The other end of the internal threaded barrel 71 is fixedly connected to the pressure plate 18. When the bidirectional screw 73 rotates, it generates thread force with the internal threaded barrel 71, thereby causing the internal threaded barrel 71 to produce axial displacement, and then push or pull the pressure plate 18, so that the pressure plate 18 squeezes the airbag 14 or detaches from the airbag 14.

[0057] In addition, the driving structure 17 is used to drive the bidirectional screw 73 to rotate, so that a thread force is generated between the internal threaded barrel 71 and the bidirectional screw 73 .

[0058] Furthermore, in order to prevent the internal threaded tube 71 from rotating due to excessive friction between the bidirectional screw 73 and the internal threaded tube 71, a guide sleeve 72 is provided in the mechanical cavity 122. The guide sleeve 72 is sleeved on the outside of the internal threaded tube 71 to limit the circumferential rotation of the internal threaded tube 71, so that the internal threaded tube 71 can only be displaced in the axial direction; preferably, the guide sleeve 72 here is welded in the mechanical cavity 122.

[0059] The driving structure 17 mentioned above includes a motor 171 , a driving wheel 172 is fixedly provided at the power output end of the motor 171 , a driven wheel 174 is installed in the middle of the bidirectional screw rod 73 , and a belt 173 is provided between the two driving wheels 172 and the driven wheel 174 .

[0060] Of course, the first extrusion assembly 7 can also be provided with two groups, that is, Figure 7 and Figure 8 As shown, two groups of first extrusion assemblies 7 are arranged near the two ends of the pressure plate 18 to increase the pressure and improve the uniformity of the extrusion force; in this state, two driven wheels 174 are provided, and the belt 173 connects the two driven wheels 174 and a driving wheel 172, and in order to ensure the transmission stability, the height of the driving wheel 172 is greater than or less than the height of the driven wheel 174, so that the belt 173 is not at the same height.

[0061] like Fig.10 In order to charge the lithium battery in the assembly slot shell 4, a positive electrode assembly 5 is provided at one end of the assembly slot shell 4 close to the opening end, and a negative electrode assembly 8 is provided at the other end of the assembly slot shell 4. The negative electrode of the lithium battery is electrically connected to the negative electrode assembly 8, and the positive electrode of the lithium battery is connected to the positive electrode assembly 5. Both the positive electrode assembly 5 and the negative electrode assembly 8 are connected to the PCB board 11.

[0062] Combination Fig.10 and Fig.11 The positive electrode assembly 5 includes a rocker arm 51, one end of which is fixedly provided with a positive electrode sheet 53, which is located at the center of the assembly slot shell 4. The positive electrode of the lithium battery located in the assembly slot shell 4 can contact the positive electrode sheet 53 to conduct a circuit between the two. The other end of the rocker arm 51 is rotatably installed on the side of the assembly slot shell 4 away from the reserved opening through a rotating shaft 52. Therefore, when the lithium battery needs to be loaded into the assembly slot shell 4, the rocker arm 51 is pushed so that the rocker arm 51 can rotate along the rotating shaft 52, so that the rocker arm 51 can drive the positive electrode sheet 53 to separate from the open end, thereby facilitating the insertion of the lithium battery. After insertion, the rocker arm 51 can be reset.

[0063] Preferably, a torsion spring may be assembled between the rotating shaft 52 and the rocker arm 51 , so that the rocker arm 51 can be automatically reset.

[0064] Combination Fig. 9 and Fig.10As shown, the above-mentioned negative electrode assembly 8 includes a bracket 82 and a negative electrode sheet 81 mounted on the bracket 82 opposite to the rocker arm 51. The negative electrode sheet 81 contacts the negative electrode of the lithium battery. The bracket 82 can move axially along the assembly slot shell 4 to enable the negative electrode sheet 81 to adapt to lithium batteries of different lengths.

[0065] Preferably, a guide groove 15 is provided at the lower side of the assembly groove shell 4, the bracket 82 passes through the guide groove 15, and a spring 83 is installed at the lower end of the bracket 82, and a positioning seat 13 is installed at one end of the lower side of the assembly groove shell 4 close to the open end, and the other end of the spring 83 is installed on the positioning seat 13. It is also preferred to fix a guide rod 84 on the side of the positioning seat 13 close to the spring 83, and the other end of the guide rod 84 passes through the lower end of the bracket 82, so that when the lithium battery is inserted into the assembly groove shell 4, the lithium battery can push the negative electrode sheet 81, and then the negative electrode sheet 81, Fig.10 The state shown is that the negative electrode sheet 81 and the bracket 82 are pushed to the threshold. In this state, the spring 83 is in a stretched state and has a rebound tendency, which can give pressure to the negative electrode sheet 81 toward the lithium battery, so that the two are in close contact.

[0066] A display screen 1 is preferably provided on the upper surface of the housing 3 to display the charging status of the lithium battery.

[0067] Embodiment 2

[0068] Different from the first embodiment, the extrusion assembly includes a second extrusion assembly 6, which includes a thrust gear 61 arranged in the middle of the mechanical cavity 122 and a thrust rack rod 62 meshing with both sides of the thrust gear 61. One end of the thrust rack rod 62 is fixedly connected to the pressure plate 18, so that when the thrust gear 61 rotates, the thrust rack rod 62 can move in the opposite direction so that the thrust rack rod 62 can push the pressure plate 18. A driving wheel 172 is fixedly provided at the power output end of the motor 171, and a driven wheel 174 is installed on the central axis of the thrust gear 61. A belt 173 is provided between the driving wheel 172 and the driven wheel 174.

[0069] like Fig.12 Of course, the second extrusion assembly 6 here can also be set in two groups to improve the uniformity of extrusion. At this time, two driven wheels 174 are set, which are respectively installed on the central axis of the thrust gear 61. The belt 173 drives and connects the two driven wheels 174 and the driving wheel 172, and the driven wheel 174 is not on the same straight line as the driving wheel 172 to maintain transmission stability.

[0070] When in use (working), by rotating the rocker arm 51, the rocker arm 51 can be rotated to a position away from the open end. At this time, the lithium battery to be charged is inserted into the interior of the assembly slot shell 4. At this time, the assembly slot shell 4 pushes the negative electrode sheet 81, so that the bracket 82 pushes the spring 83, and then the rocker arm 51 is reset, so that the positive electrode sheet 53 is aligned with the positive electrode of the lithium battery. The power plug 2 is inserted into the mains to charge the lithium battery. The voltage detection sensor detects the voltage of the backup battery 16. When the voltage of the backup battery 16 is too low (that is, the power is low), the external power supply (mains) will charge the backup battery 16 in addition to charging the lithium battery. When the external power supply is cut off, the backup battery 16 charges the lithium battery to ensure that the device can also charge the lithium battery in the event of a power outage.

[0071] Once the lithium battery short-circuits or other circumstances lead to a fire, the smoke detection sensor 19 detects the smoke and transmits a signal to the motor 171. At this time, the driving structure 17 can drive the extrusion assembly to work, which can push the pressure plate 18 when working. The pressure plate 18 can generate an extrusion force on the airbag 14. When the thin layer 141 on the airbag 14 is squeezed, it will first be damaged by the gas pressure of the inert gas due to its thin texture, so that the inert gas and the dry powder fire extinguishing material can enter the assembly slot shell 4 from the damaged position of the thin layer 141 to perform the fire extinguishing operation. At the same time, the pressure plate 18 can push the push rod 95 and the gear rod 92, so that the gear rod 92 can drive the driving gear 94 to Figure 2 Counterclockwise rotation is generated from the perspective shown, so that the driven gear 93 can generate clockwise rotation, and its clockwise rotation can drive the pull rod 91 to rotate clockwise, and then the pull rod 91 shell pulls the fireproof cloth 10 when rotating, so that the fireproof cloth 10 can cover the opening end to prevent the fire from spreading from the opening end.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dual-channel signal recognition lithium battery charger with backup function, comprising a housing (3), characterized in that: Also includes: An assembly slot shell (4), the assembly slot shell (4) being located inside the outer shell (3), and a reserved opening being provided on one side of the assembly slot shell (4), and the assembly slot shell (4) being used to accommodate a lithium battery to be charged; and A backup battery (16), the backup battery (16) is located in the housing (3), and the backup battery (16) serves as a backup for charging the lithium battery; and An inner cover (12), the inner cover (12) being located at one side of the reserved opening of the assembly slot shell (4), and an air bag (14) being provided in the inner cover (12), inert gas and dry powder fire extinguishing material being provided in the air bag (14), and an extrusion component for extruding the air bag (14) being provided in the inner cover (12), the extrusion component being used to generate pressure loss on the air bag (14), so that the dry powder and inert gas in the air bag (14) enter the assembly slot shell (4) from the reserved opening, so as to extinguish the fire of the lithium battery; One end of the assembly slot shell (4) is formed into a sealed end by the outer shell (3), and the other end of the assembly slot shell (4) is an open end, a fireproof cloth (10) is fixedly arranged above a side of the outer shell (3) close to the open end, and a protruding shell is arranged on a side of the outer shell (3) close to the open end of the assembly slot shell (4) at a position opposite to the fireproof cloth (10), and the fireproof cloth (10) is accommodated in the protruding shell; A cloth pulling assembly (9) is provided on one side of the upper part of the shell (3) close to the fireproof cloth (10), and the cloth pulling assembly (9) is used to unfold the fireproof cloth (10) so that the fireproof cloth (10) blocks the open end; A pressure plate (18) is installed on a side of the power output end of the extrusion component close to the airbag (14), and the extrusion component extrudes the airbag (14) by pushing the pressure plate (18); The cloth pulling assembly (9) comprises a push rod (95) fixed to a side of the pressure plate (18) close to the airbag (14), a gear rod (92) mounted on the other end of the push rod (95), a driving gear (94) meshed with the gear rod (92) below, a driven gear (93) meshed with the driving gear (94) below, and a pull rod (91) with one end coaxial with the driven gear (93), wherein the pull rod (91) is fixedly connected to the lower side of the fireproof cloth (10); A thin layer (141) is provided on one side of the air bag (14) close to the reserved opening, and when the air bag (14) is squeezed, the thin layer (141) is damaged by the pressure of the inert gas, so that the inert gas and the dry powder fire extinguishing material enter the assembly slot shell (4) from the damaged position of the thin layer (141); A positioning plate (142) is fixedly provided on a side of the airbag (14) away from the mechanical chamber (122), and the positioning plate (142) is fixedly connected to the inner cover (12) by bolts; It also includes a driving structure (17), wherein the driving structure (17) is used to drive the extrusion assembly to work; It also includes a smoke detection sensor (19) and a controller, wherein the smoke detection sensor (19) is installed on a side of the assembly slot shell (4) close to the reserved opening, and the smoke detection sensor (19) is used to detect smoke and transmit a signal to the controller, and the controller controls the operation of the drive structure (17); The inner cover (12) is divided into three chambers along the connecting line direction of the two assembly slot shells (4), the middle chamber is a mechanical chamber (122) for accommodating the drive structure (17) and the extrusion assembly, and the chambers on both sides are fire extinguishing chambers (121) for accommodating the airbag (14); The pressure plate (18) is located in the fire extinguishing chamber (121); The extrusion assembly comprises a first extrusion assembly (7), the first extrusion assembly (7) comprising a bidirectional screw rod (73) located in the middle of the mechanical cavity (122) and an internal threaded barrel (71) threadedly connected to both ends of the bidirectional screw rod (73), the other end of the internal threaded barrel (71) being fixedly connected to a pressing plate (18); The driving structure (17) is used to drive the bidirectional screw rod (73) to rotate, so as to generate a thread force between the internal threaded cylinder (71) and the bidirectional screw rod (73); A guide sleeve (72) is provided in the mechanical cavity (122), and the guide sleeve (72) is sleeved on the outside of the internal threaded cylinder (71) to limit the circumferential rotation of the internal threaded cylinder (71); The extrusion assembly comprises a second extrusion assembly (6), the second extrusion assembly comprising a thrust gear (61) disposed in the middle of the mechanical cavity (122) and a thrust rack rod (62) meshed with two sides of the thrust gear (61), one end of the thrust rack rod (62) being fixedly connected to the pressure plate (18); The driving structure (17) comprises a motor (171), a driving wheel (172) is fixedly provided at the power output end of the motor (171), a driven wheel (174) is installed in the middle of the bidirectional screw rod (73), and a belt (173) is provided between the two driving wheels (172) and the driven wheel (174); two groups of the first extrusion components (7) are provided, and the two groups of the first extrusion components (7) are arranged at positions close to both ends of the pressing plate (18) to increase the pressure and improve the uniformity of the extrusion force; in this state, two driven wheels (174) are provided, and the belt (173) connects the two driven wheels (174) and one driving wheel (172), and in order to ensure transmission stability, the height of the driving wheel (172) is greater than or less than the height of the driven wheel (174), so that the belt (173) is not at the same height; A positive electrode assembly (5) is provided at one end of the assembly tank shell (4) close to the open end, and a negative electrode assembly (8) is provided at the other end of the assembly tank shell (4); the negative electrode of the lithium battery is electrically connected to the negative electrode assembly (8), and the positive electrode of the lithium battery is connected to the positive electrode assembly (5); The positive electrode assembly (5) comprises a rocker arm (51), one end of which is fixedly provided with a positive electrode sheet (53), the positive electrode sheet (53) being located at the center of the assembly slot shell (4), and the other end of the rocker arm (51) being rotatably mounted on a side of the assembly slot shell (4) away from the reserved opening via a rotating shaft (52); when a lithium battery needs to be loaded into the assembly slot shell (4), the rocker arm (51) is pushed so that the rocker arm (51) can rotate along the rotating shaft (52), so that the rocker arm (51) can drive the positive electrode sheet (53) to be separated from the open end, thereby facilitating the insertion of the lithium battery; after the insertion, the rocker arm (51) can be reset; a torsion spring can also be assembled between the rotating shaft (52) and the rocker arm (51), so that the rocker arm (51) can be automatically reset; The negative electrode assembly (8) comprises a bracket (82) and a negative electrode sheet (81) mounted on the bracket (82) and opposite to the rocker arm (51); the bracket (82) can move along the axial direction of the assembly slot shell (4) so ​​that the negative electrode sheet (81) can adapt to lithium batteries of different lengths; a guide groove (15) is provided on the lower side of the assembly slot shell (4); the bracket (82) passes through the guide groove (15); a spring (83) is installed at the lower end of the bracket (82); a positioning seat (13) is installed at one end of the lower side of the assembly slot shell (4) close to the open end; the spring (83) ) is mounted on a positioning seat (13), and a guide rod (84) is fixed on a side of the positioning seat (13) close to the spring (83). The other end of the guide rod (84) passes through the lower end of the bracket (82), so that when the lithium battery is inserted into the assembly slot shell (4), the lithium battery can push the negative electrode sheet (81), and the negative electrode sheet (81) and the bracket (82) are pushed to a threshold state. In this state, the spring (83) is in a stretched state and has a rebound tendency, which can give the negative electrode sheet (81) a pressure in the direction of the lithium battery, so that the two are in close contact; When the pressure plate (18) squeezes the airbag (14), the pressure plate (18) can be displaced, thereby pushing the push rod (95) and the gear rod (92), so that the gear rod (92) can drive the driving gear (94) to rotate counterclockwise, so that the driven gear (93) can rotate clockwise, and the clockwise rotation can drive the pull rod (91) to rotate clockwise, and then the pull rod (91) shell pulls the fireproof cloth (10) when rotating, so that the fireproof cloth (10) can cover the opening end; the fireproof cloth (10) is a fan-shaped structure to adapt to the movement trajectory of the pull rod (91); In order to ensure the strength of the airbag (14) to prevent the airbag (14) from self-explosion, the airbag (14) is made of polyimide fiber, polyester fiber or polypropylene fiber, which can ensure the strength of the airbag (14). However, in this case, it is difficult for the airbag (14) to produce pressure loss when it is squeezed by the pressure plate (18), which also causes the dry powder and the inert gas to be unable to be discharged. Therefore, a thin layer (141) is provided on one side of the airbag (14) close to the reserved opening. When the thin layer (141) is squeezed, it will first be damaged by the gas pressure of the inert gas due to its thinness, so that the inert gas and the dry powder fire extinguishing material can enter the assembly slot shell (4) from the damaged position of the thin layer (141) to perform the fire extinguishing operation; The material of the thin layer (141) is polytetrafluoroethylene or rubber, which will be damaged under high air pressure. When the airbag (14) is prepared, a plurality of through holes are first opened on the airbag (14), and the thin layer (141) is bonded to the airbag (14) by an adhesive to cover the through holes. The diameter of the thin layer (141) is larger than the diameter of the through holes to facilitate the bonding operation of the thin layer (141).

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