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CN-224204788-U - Portable semi-closed lithium battery charger

CN224204788UCN 224204788 UCN224204788 UCN 224204788UCN-224204788-U

Abstract

The utility model relates to a portable semi-closed lithium battery charger which comprises a semi-closed shell, a connecting cable and a charging main control board, wherein the semi-closed shell comprises an upper shell and a lower shell which are detachably connected, heat dissipation long grooves are formed in two sides of the upper shell and the lower shell, a bayonet is formed after the upper shell and the lower shell are buckled, a pulse activation bypass circuit of the charging main control board is connected to a DCDC (direct current to direct current) conversion circuit, a power supply input end is connected with a charging output end through the DCDC conversion circuit and the pulse activation bypass circuit after passing through a rectifying and filtering circuit, an input end of a singlechip control circuit is connected with a charged battery, and an output end of the singlechip control circuit is connected with the DCDC conversion circuit and the pulse activation bypass circuit. The portable semi-closed lithium battery charger shell design can realize safe and good heat dissipation effect and is convenient to assemble, disassemble and maintain, and the main board has auxiliary functions of battery damage stopping, current limiting protection, backflow prevention and the like on the basis of having the functions of outputting reverse connection prevention and undervoltage pulse activation.

Inventors

  • WANG KANGYIN

Assignees

  • 爱科(河南)科技实业有限公司

Dates

Publication Date
20260505
Application Date
20241204

Claims (5)

  1. 1. The portable semi-closed lithium battery charger is characterized by comprising a semi-closed shell (1), connecting cables (2) and a charging main control board (3), wherein the charging main control board (3) is installed and fixed inside the semi-closed shell (1), the two connecting cables (2) are fixedly arranged at two ends of the semi-closed shell (1) in a penetrating way and extend into the semi-closed shell (1) to be connected with the charging main control board (3), The semi-closed shell (1) comprises an upper shell (11) and a lower shell (12) which are detachably connected, heat dissipation long grooves (13) penetrating into cavities of the semi-closed shell (1) are formed in two sides of the upper shell (11) and the lower shell (12), and a bayonet (14) for clamping and fixing a connecting cable is formed after the upper shell (11) and the lower shell (12) are buckled; The bayonet (14) at the input end of the semi-closed shell (1) is positioned on one side of the side surface, and an annular concentric heat dissipation long groove (13) is formed beside the bayonet (14), the bayonet (14) at the output end of the semi-closed shell (1) is positioned in the center of the other side surface, and the side surface forms a linear surrounding heat dissipation long groove (13) at the periphery of the bayonet (14); The charging control board (3) is integrated with a rectification filter circuit (31), a DCDC (direct current) conversion circuit (32), a pulse activation bypass circuit (33) and a singlechip control circuit (34), the pulse activation bypass circuit (33) is connected to the DCDC conversion circuit (32), a power supply input end is connected with a charging output end through the DCDC conversion circuit (32) and the pulse activation bypass circuit (33) after passing through the rectification filter circuit (31), an input end of the singlechip control circuit (34) is connected with a charged battery, and an output end of the singlechip control circuit (34) is connected with the DCDC conversion circuit (32) and the pulse activation bypass circuit (33) respectively.
  2. 2. The portable semi-closed lithium battery charger of claim 1, wherein the pulse activation bypass circuit (33) is provided with an N-channel MOS tube, a current-limiting PTC and a backflow-preventing diode for controlling pulse output.
  3. 3. The portable semi-closed lithium battery charger of claim 2, wherein the output end of the single chip microcomputer control circuit (34) is connected with an N-channel MOS tube.
  4. 4. The portable semi-closed lithium battery charger according to claim 3, wherein the H-shaped clamping limiting pieces (21) are arranged on the two connecting cables (2).
  5. 5. The portable semi-closed lithium battery charger according to claim 4, wherein plugs for connecting an alternating current power supply and a load charging port are respectively arranged at the outer side ends of the two connecting cables (2), and the inner side ends of the two connecting cables (2) extend into the semi-closed shell (1) and are respectively connected with a power supply input end and a charging output end integrated on the charging main control board (3).

Description

Portable semi-closed lithium battery charger Technical Field The utility model relates to the technical field of vehicle-to-power grid devices, in particular to a portable semi-closed lithium battery charger. Background Common portable battery charger in the existing market, common shell design is serious in homogenization, and design and improvement aiming at a heat dissipation function are insufficient. The battery charger generally has no pulse activated charging function, and is usually directly charged after being electrified, the charging mode is very likely to directly damage the battery and the charger when the battery is reversely connected, which brings unnecessary risks and losses to users, meanwhile, when the lithium battery is placed for a long time and enters an under-voltage protection state, the charger directly charges the lithium battery and cannot activate the lithium battery, namely, the battery charging cannot be realized, so that the use scene of the lithium battery is limited, inconvenience is brought to the user, the user experience is reduced, and in addition, the battery is subjected to bulge deformation and even fire explosion risks for a certain bad battery with damage for a long time. Therefore, the existing portable chargers and chargers on the market have obvious defects in terms of safety and functionality, and improvement is needed. Disclosure of utility model The utility model solves the technical problems that the prior charger overcomes the defects of the prior charger in the aspects of shell structural design, main board safety and functionality, provides a portable semi-closed lithium battery charger, has the advantages of safety, reliability, durability and low failure rate, the design of the outer shell of the portable semi-closed lithium battery charger can realize safe and good heat dissipation effect, is convenient to assemble, disassemble and maintain, and has a certain repairing function on the lithium battery on the basis of having the functions of output reverse connection prevention and under-voltage pulse activation, and simultaneously has auxiliary functions of battery damage stopping, current limiting protection, backflow prevention and the like, thereby solving the problems that the prior charger cannot activate a deeply discharged battery, and the battery is charged with a large current for a long time to cause battery charging bulge or even fire explosion. The portable semi-closed lithium battery charger comprises a semi-closed shell, connecting cables and a charging main control board, wherein the charging main control board is fixedly arranged in the semi-closed shell, the two connecting cables are fixedly arranged at two ends of the semi-closed shell in a penetrating mode and extend into the semi-closed shell to be connected with the charging main control board, the semi-closed shell comprises an upper shell and a lower shell which are detachably connected, long radiating grooves penetrating into a cavity of the semi-closed shell are formed in two sides of the upper shell and the lower shell, a bayonet used for clamping the connecting cables is formed after the upper shell and the lower shell are buckled, the charging main control board is integrated with a rectifying filter circuit, a DCDC (direct current-direct current) conversion circuit, a pulse activation bypass circuit and a singlechip control circuit, the pulse activation bypass circuit is connected to the DCDC conversion circuit, the power supply input end is connected with a charging output end through the DCDC conversion circuit and the pulse activation bypass circuit after passing through the rectifying filter circuit, the input end of the singlechip control circuit is connected with a charged battery, and the output end of the singlechip control circuit is connected with the DCDC conversion circuit and the pulse activation bypass circuit respectively. Optimally, the pulse activation bypass circuit is provided with an N-channel MOS tube, a current-limiting PTC and an anti-backflow diode for controlling pulse output. Further, the method. The output end of the singlechip control circuit is connected with the N-channel MOS tube. Optimally, two connecting cables are provided with H-shaped clamping limiting pieces. Furthermore, the bayonet at the input end of the semi-closed shell is positioned at one side of the side face, an annular concentric heat dissipation long groove is formed beside the bayonet, the bayonet at the output end of the semi-closed shell is positioned at the center of the other side face, and the side face forms a straight line surrounding heat dissipation long groove at the periphery of the bayonet. Furthermore, plugs for connecting an alternating current power supply and a load charging port are respectively arranged at the outer side ends of the two connecting cables, the inner side ends of the two connecting cables extend into the semi-closed shell and are respectively co