CN211239382U

CN211239382U - Battery pack adapter

Info

Publication number: CN211239382U
Application number: CN201922244059.6U
Authority: CN
Inventors: 王超
Original assignee: Zhangjiagang Huajie Electronics Co Ltd
Current assignee: Zhangjiagang Huajie Electronics Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-08-11
Anticipated expiration: 2029-12-13

Abstract

The utility model relates to a battery pack adapter, which comprises a housin, this casing includes battery case and control box, and the inside installation cavity that is equipped with of battery case, the one end opening of installation cavity form the plug mouth, are provided with the control chamber in the control box, are provided with the PCB board in the control chamber, are connected with positive connecting terminal on the PCB board, negative connecting terminal, anodal plug terminal, negative pole plug terminal, temperature measurement terminal, and three slot has been seted up to the one end of control box, anodal plug terminal, negative pole plug terminal, temperature measurement terminal be located the control chamber and with three slot one-to-one. The utility model discloses a positive connecting terminal and negative connecting terminal are connected with the battery package, and positive plug terminal, negative pole plug terminal and temperature measurement terminal correspond with electric tool and are connected to the PCB board couples together positive connecting terminal and positive plug terminal, couples together negative connecting terminal and negative pole plug terminal, makes electric tool pass through battery package adapter use originally can not the battery package of assembly.

Description

Battery pack adapter

The technical field is as follows:

the utility model relates to a battery package adapter.

Background art:

portable electric tool all is provided with the battery package, has two kinds of connected modes between present battery package and the electric tool main part, and one kind is built-in, and the battery package can't be changed promptly, then need stop electric tool's use when the battery package is under-voltage and charge, and the back is accomplished in charging, resumes the use, and this obviously can greatly reduced electric tool's rate of utilization.

The other connection mode is an external connection mode, namely the battery pack is detachably connected with the electric tool main body through an external interface (hereinafter, briefly described as a battery clamp) of the electric tool main body, the electric tool has the function of replacing the battery pack, the battery pack can be detached to replace the battery pack in a full-charge state to continue to be used under the condition that the battery pack is in an undervoltage state, and the battery pack in an undercharge state can be independently charged, so that the use efficiency of the electric tool can be greatly improved.

Since the power tool is frequently used, the power tool may be damaged and the battery pack may be used. At this time, the consumer can buy a new electric tool again and continue to use the old battery pack, so that the cost is reduced and the waste is avoided.

However, since the electric tools are fast in updating and upgrading speed and various electric tools are in wide variety at present, different batches or different brands of electric tools have different battery clamp structures, which cannot be clearly distinguished for non-professional users, and the battery clamp of the newly purchased electric tool is often not matched with the originally existing battery pack, so that the originally existing battery clamp is idle and cannot be used.

The utility model has the following contents:

the utility model discloses the technical problem that will solve is: provided is a battery pack adapter which can connect and use a battery pack and a battery clip which cannot be matched.

In order to solve the technical problem, the utility model discloses a technical scheme is: the battery pack adapter comprises a shell and is characterized in that the shell comprises a battery box located at the lower part and a control box connected to the upper end of the battery box, a mounting cavity is arranged inside the battery box, a plug opening is formed in one end of the mounting cavity at the opening of the battery box, guide convex ribs extending inwards from the plug opening are arranged on the wall of the two side walls of the mounting cavity, a control cavity is arranged in the control box and isolated from the mounting cavity, a PCB is arranged in the control cavity, a positive connecting terminal and a negative connecting terminal corresponding to the positive pole and the negative pole of a battery pack are connected to the PCB, the lower ends of the positive connecting terminal and the negative connecting terminal extend downwards and are inserted into the mounting cavity, when the battery pack is inserted into the mounting cavity along the guide convex ribs, the positive connecting terminal and the negative connecting terminal are just inserted into the positive pole slot, the negative pole slot and the negative pole slot of the battery pack respectively, the temperature measuring device comprises a negative electrode plug-in terminal and a temperature measuring terminal, wherein three slots are formed in one end of the control box, the positive electrode plug-in terminal, the negative electrode plug-in terminal and the temperature measuring terminal are located in the control cavity and correspond to the three slots one to one, and clamping grooves clamped with the battery clamp are formed in the outer walls of the two sides of the control box.

As a preferred scheme, a limiting buckle used for blocking the battery pack from sliding out is arranged on the battery box.

As a preferred scheme, a battery pack high-temperature protection circuit is arranged on the PCB and comprises a singlechip, the singlechip is provided with a power supply pin VCC, a grounding pin GND, a temperature measurement pin TMP and a switch pin S, the positive connecting terminal is connected with the positive inserting terminal through a first electronic switch, the negative connecting terminal is connected with the negative inserting terminal through an NTC resistor, a power supply pin VCC of the singlechip is connected with the positive connecting terminal, a grounding pin GND is grounded, a temperature measuring pin TMP is connected with the positive pole of the NTC resistor to detect the voltage of the positive pole of the NTC resistor, a switch pin S is connected with the control pole of the second electronic switch, the drain of the second electronic switch is grounded, the source is connected with the control pole of the first electronic switch, the drain of the first electronic switch is connected with the positive pole plug-in terminal, the NTC resistance pastes on negative connection terminal, the temperature measurement terminal is connected with the NTC resistance positive pole.

The utility model has the advantages that: the utility model discloses a positive connecting terminal and negative connecting terminal are connected with the battery package, correspond through anodal plug terminal, negative pole plug terminal and temperature measurement terminal and electric tool and be connected, then couple together positive connecting terminal and anodal plug terminal with the PCB board, couple together negative connecting terminal and negative pole plug terminal for electric tool can pass through battery package adapter use originally the battery package that can not assemble.

The utility model discloses further restrict battery package roll-off battery case through set up spacing knot on the battery case, improve the safety in utilization of battery package adapter.

The utility model discloses further through the optimization to the circuit on the PCB board, utilize the singlechip to the detection of NCT resistance positive terminal voltage, judge NTC resistance 'S operating temperature, then the operating temperature control switch pin S according to NTC resistance is the output high level still outputs the low level to control second electronic switch, first electronic switch' S break-make, the break-make of the whole circuit of final control, discharge with the protection battery package is not warm.

Description of the drawings:

the following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a sectional view A-A of FIG. 1;

fig. 3 is a circuit diagram on a PLC.

In fig. 1 to 3: 1. the temperature measuring device comprises a shell, 101, a battery box, 102, a control box, 2, an installation cavity, 3, a plug port, 4, a guide convex rib, 5, a control cavity, 6, a PCB board, 7, a positive connecting terminal, 8, a negative connecting terminal, 9, a positive plug terminal, 10, a negative plug terminal, 11, a temperature measuring terminal, 12, a slot, 13, a clamping groove, 14, a single chip microcomputer, 15, a first electronic switch, 16, an NTC resistor, 17, a second electronic switch, 18, a limit buckle, 19 and a torsion spring.

The specific implementation mode is as follows:

the following describes in detail a specific embodiment of the present invention with reference to the drawings.

As shown in fig. 1 and 2, the battery pack adapter comprises a housing 1, the housing 1 comprises a battery box 101 located at the lower part and a control box 102 connected to the upper end of the battery box 101, a mounting cavity 2 is arranged inside the battery box 101, the mounting cavity 2 forms a plug opening 3 at one end of the battery box 101, guide convex ribs 4 extending inwards from the plug opening 3 are arranged on the two side cavity walls of the mounting cavity 2, a control cavity 5 is arranged in the control box 102, the control cavity 5 is isolated from the mounting cavity 2, a PCB 6 is arranged in the control cavity 5, a positive connecting terminal 7 and a negative connecting terminal 8 corresponding to the positive pole and the negative pole of the battery pack are connected to the PCB 6, the lower ends of the positive connecting terminal 7 and the negative connecting terminal 8 extend downwards and are inserted into the mounting cavity 2, when the battery pack is inserted into the mounting cavity 2 along the guide convex ribs 4, the positive connecting terminal 7 and the negative connecting terminal 8 are just inserted into the positive slot and the, the PCB 6 is also connected with three positive plug-in terminals 9, negative plug-in terminals 10 and temperature measuring terminals 11 which are matched with the battery clamp of the electric tool, one end of the control box 102 is provided with three slots 12, the positive plug-in terminals 9, the negative plug-in terminals 10 and the temperature measuring terminals 11 are positioned in the control cavity 5 and are in one-to-one correspondence with the three slots 12, and the outer walls of two sides of the control box 102 are provided with clamping grooves 13 which are clamped with the battery clamp. As shown in fig. 2, be provided with the spacing knot 18 that is used for blockking the battery package roll-off on the battery case 101, spacing knot 18 rotates through the bolt and connects on the battery case 101, has cup jointed torsional spring 19 on the bolt, and the elastic force of torsional spring 19 orders about the downward swing of spacing knot 18 right-hand member, keeps off in plug mouth 3 department, prevents the battery package roll-off.

As shown in fig. 3, the PCB 6 is provided with a battery pack high temperature protection circuit, the circuit includes a single chip 14, the single chip 14 is provided with a power pin VCC, a ground pin GND, a temperature measurement pin TMP, and a switch pin S, the positive connection terminal 7 and the positive connection terminal 9 are connected through a first electronic switch 15, the first electronic switch 15 can be a MOS transistor or other field effect transistor, the negative connection terminal 8 is connected with the negative connection terminal 10 through an NTC resistor 16, the NTC resistor is a thermistor, the power pin VCC of the single chip 14 is connected to the positive connection terminal 7 to be powered and operated, the ground pin GND is grounded or connected to the negative connection terminal 8, the temperature measurement pin TMP is connected to the positive electrode of the NTC resistor 16 to detect the positive voltage of the NTC resistor 16, the switch pin S is connected to the control electrode of the second electronic switch 17, the second electronic switch 17 can be a MOS transistor or other field, the drain electrode of the second electronic switch 17 is grounded, the source electrode is connected with the control electrode of the first electronic switch 15, the drain electrode of the first electronic switch 15 is connected with the positive electrode plug-in terminal 9, the NTC resistor 16 is attached to the negative connection terminal 8, when the temperature of the battery pack rises, the negative connection terminal 8 directly connected with the electric battery pack also rises along with the temperature rise, and the NTC resistor 16 is attached to the negative connection terminal 8, so that the working temperature of the battery pack can be accurately measured. The temperature measuring terminal 11 is connected with the positive electrode of the NTC resistor 16 to supply a control chip inside the power tool to detect the working temperature of the battery pack, and the working temperature of the battery pack is ensured not to exceed a preset temperature.

The utility model discloses the working process is: as shown in fig. 1-3, firstly, the battery pack is inserted into the installation cavity 2 from the insertion opening 3, when the battery pack is inserted, the right end of the limit buckle 18 is jacked up by the battery pack, after the battery pack is inserted, the limit buckle 18 resets under the elasticity of the torsion spring 19, and the right end of the limit buckle 18 blocks the tail of the battery pack to prevent the battery pack from sliding out of the installation cavity 2. After the battery package installation, singlechip 14 is with electric operation, detects the battery package temperature to be in standby state at any time, be less than the default when the battery package temperature, then singlechip 14 passes through switch pin S and exports the high level, makes second electronic switch 17 switch on, and second electronic switch 17 switches on and makes first electronic switch 15 switch on, then realizes connecting between positive connecting terminal 7 and the anodal grafting terminal 9, when electric tool starts, just can form the return circuit.

After the battery pack is installed in the battery box 101, the shell 1 is butted with a battery clamp of the electric tool, during installation, the control box 102 is aligned with the battery clamp and inserted into the battery clamp along the clamping groove 13, installation is completed, and three terminals in the battery clamp are respectively inserted into the positive electrode inserting terminal 9, the negative electrode inserting terminal 10 and the temperature measuring terminal 11.

When the electric tool is started, the motor starts to rotate, the battery pack starts to discharge, the temperature of the battery pack gradually rises in the use process of the battery pack, the temperature of the negative connecting terminal 8 also rises along with the temperature rise of the battery pack, the resistance value of the NTC resistor 16 attached to the negative connecting terminal 8 quickly drops, the voltage of the positive terminal of the NCT resistor 16 rises, the highest voltage is preset in the single chip microcomputer 14 and represents the highest working temperature of the battery pack, when the single chip microcomputer 14 detects that the voltage value reaches the highest voltage, the single chip microcomputer controls the switch pin S to output a low level, the second electronic switch 17 and the first electronic switch 15 are immediately switched off, the positive connecting terminal 7 and the positive plugging terminal 9 are switched off, and the electric tool cannot run.

Meanwhile, an internal control chip of the electric tool connected with the temperature measuring terminal 11 is also arranged for detecting the voltage of the positive terminal of the NTC resistor 16, and when the voltage detected by the internal control chip of the electric tool reaches the maximum voltage preset by the internal control chip, the internal circuit of the electric tool is also controlled to be disconnected, so that the motor stops rotating, and the battery pack is protected.

The above embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments in use, and are not intended to limit the invention; it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications belong to the protection scope of the present invention.

Claims

1. The battery pack adapter comprises a shell (1) and is characterized in that the shell (1) comprises a battery box (101) positioned at the lower part and a control box (102) connected to the upper end of the battery box (101), a mounting cavity (2) is arranged in the battery box (101), a plugging port (3) is formed at one end of the battery box (101) by the mounting cavity (2), guiding convex ribs (4) extending inwards from the plugging port (3) are arranged on the cavity walls at two sides of the mounting cavity (2), a control cavity (5) is arranged in the control box (102), the control cavity (5) is isolated from the mounting cavity (2), a PCB (6) is arranged in the control cavity (5), a positive connecting terminal (7) and a negative connecting terminal (8) corresponding to the positive pole and the negative pole of a battery pack are connected onto the PCB (6), the lower ends of the positive connecting terminal (7) and the negative connecting terminal (8) both extend downwards and are inserted into the mounting cavity (2), when the battery pack is inserted into the mounting cavity (2) along the guide convex rib (4), the positive connecting terminal (7) and the negative connecting terminal (8) are just respectively inserted into the positive slot and the negative slot of the battery pack, the PCB (6) is further connected with three positive inserting terminal (9), negative inserting terminal (10) and temperature measuring terminal (11) matched with the electric tool battery clamp, three slots (12) are formed in one end of the control box (102), the positive inserting terminal (9), the negative inserting terminal (10) and the temperature measuring terminal (11) are located in the control cavity (5) and correspond to the three slots (12) one by one, and clamping grooves (13) clamped with the battery clamp are formed in the outer walls of the two sides of the control box (102).

2. The battery pack adapter according to claim 1, wherein a stop buckle (18) for blocking the battery pack from sliding out is arranged on the battery box (101).

3. The battery pack adapter according to claim 1, wherein the PCB (6) is provided with a battery pack high temperature protection circuit, the circuit comprises a single chip microcomputer (14), the single chip microcomputer (14) is provided with a power supply pin VCC, a ground pin GND, a temperature measurement pin TMP, and a switch pin S, the positive connection terminal (7) and the positive plug terminal (9) are connected through a first electronic switch (15), the negative connection terminal (8) is connected with the negative plug terminal (10) through an NTC resistor (16), the power supply pin VCC of the single chip microcomputer (14) is connected with the positive connection terminal (7), the ground pin GND is grounded, the temperature measurement pin TMP is connected with the positive electrode of the NTC resistor (16) to detect the positive voltage of the NTC resistor (16), the switch pin S is connected with the control electrode of the second electronic switch (17), and the drain electrode of the second electronic switch (17) is grounded, the source electrode of the first electronic switch (15) is connected with the control electrode of the first electronic switch, the drain electrode of the first electronic switch (15) is connected with the positive electrode plug-in terminal (9), the NTC resistor (16) is attached to the negative connection terminal (8), and the temperature measurement terminal (11) is connected with the positive electrode of the NTC resistor (16).