CN203843347U - Portable off-grid type direct-current arc welding machine with built-in lithium battery pack - Google Patents
Portable off-grid type direct-current arc welding machine with built-in lithium battery pack Download PDFInfo
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- CN203843347U CN203843347U CN201420069553.8U CN201420069553U CN203843347U CN 203843347 U CN203843347 U CN 203843347U CN 201420069553 U CN201420069553 U CN 201420069553U CN 203843347 U CN203843347 U CN 203843347U
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Abstract
The utility model relates to a portable off-grid type direct-current arc welding machine with a built-in lithium battery pack. The portable off-grid type direct-current arc welding machine mainly comprises the lithium battery pack, a control system, a welding current control system and an arc welding generating device. A working principle for welding includes that the lithium battery pack of the welding machine provides stable 48-volt direct-current power for the arc welding generating device, the stable 48-volt direct-current power is subjected to filtering and pulse width modulation by the arc welding generating device, flows through a chopper circuit, and is converted into direct-current pulse current which is not less than 50 kilohertz and has the characteristic of descending, combustion is stable by using a pilot arc circuit, electric welding rods and welding materials are fused, and the purpose of cooling down the electric welding rods and the welding materials so as to combine the electric welding rods and the welding materials is achieved. The control system monitors variation of discharge current and discharge voltage through a voltage and current detecting circuit, on-off states of a time-delay circuit and a relay are controlled, and the purpose of protecting inner circuits and the battery pack is achieved.
Description
Technical field
The utility model relates to for outdoor emergency, the needs of rushing to repair, speedily carry out rescue work, when having electrical network to support, can not use built-in lithium battery group to carry out the DC arc welder of weld job.
Technical background
The DC arc welder of the market mainstream is DC inverse arc welding machine now, its basic functional principle is after three-phase or single-phase 50 hertz of industrial frequency AC electric rectifications, filtering, to obtain a more level and smooth direct current, the inverter circuit being comprised of IGBT or FET becomes this direct current in the alternating current of 15～100 KHzs, after the step-down of intermediate frequency main transformer, rectifying and wave-filtering obtains the output of direct current stably welding current (or the alternating current of required frequency is exported in inversion again) again.The control circuit of inversion direct current welding and cutting device is comprised of given circuit and drive circuit etc., by the feedback of voltage, current signal is processed, realize complete machine loop control, adopt the control technology that pulse-width modulation PWM is core, thereby obtain the welding direct current output with constant-current characteristics of quick pulsewidth modulation, guaranteed excellent welding technological effect.Its key technical feature is AC-DC, and DC inversion is midfrequent AC, and AC rectification straightens stream.
Compare with AC welding set, DC inverse arc welding machine floating voltage is high, and striking is easy, and output current does not have " zero crossing ", and stable electric arc and droplet transfer stably can be provided.-dawn electric arc is ignited, and direct-current arc can keep continuous burning; And while adopting AC power welding, due to the change of electric current and voltage direction, and electric arc will extinguish and again ignite more than 120 times each second, electric arc can not continous-stable burning.In the situation that welding current is lower, direct-current arc has good wetting action to the weld metal of fusing, applied widely, and energy standard weld size, and the metal foil part that cannot weld for AC welding set has extraordinary welding effect.
No matter be AC welding set or inverter type welder in the situation that not having electrical network to support, after can only being 220 volts or 380 volt AC power by petrol and diesel oil TRT or the inversion of lead-acid battery group, for its power supply could meet the needs of realizing outdoor study.Adopt the weight of a whole set of equipment of these two kinds of modes all more than 100 kilograms, that uses generator also will carry oil plant.Even if adopt lead-acid battery group, due to the higher striking current of inverter type welder and the irregular variation of working end voltage, greatly shortened its service life the deep discharge that causes lead-acid battery group.Because lead-acid battery discharge-rate is lower, needing again first inversion is 4000 watts of above alternating currents, in order to guarantee that inverter power reaches the instructions for use of welding machine, the equipment module of lead-acid battery is more, generally only lead-acid battery case just weigh 90 kilograms and volume large, carry inconvenience.Adopt these two kinds of modes all to affect greatly the mobility of meeting an urgent need, rush to repair, speedily carrying out rescue work, the cost of a whole set of equipment is higher, has limited such and has been equipped in use emergent, the aspect of rushing to repair, speedily carry out rescue work.
Summary of the invention
For the outdoor weld job equipment volume solving when not having electrical network to support large, Heavy Weight, mobility is bad, many drawbacks such as be unfavorable for carrying, a kind of built-in lithium battery group portable from net type DC arc welder, lithium battery group in housing, discharge and recharge control panel, cut-out relay, arc-welding generator is linked in sequence, it is characterized in that: lithium battery group is by discharging and recharging 48 volts of control panel outputs, 300 amperes of constant current dc sources, connection is by chopping switch, the arc-welding generator that fly-wheel diode and inductance form, the safety protection circuit that electrical equipment forms is succeeded in loop, form non-inverse type DC arc welder.
Technical scheme of the present invention is mainly by lithium battery group and control system, welding current control system, and arc-welding generating means forms (as shown in Figure 1).
1, lithium battery group and charge control system
Lithium battery group is selected 8 ampere-hours, 3.7 volts of LiMn2O4 high magnification battery cores, adopt 13 string 3 structures, form 48 volts, 24 ampere-hour lithium battery groups, using EG4313 integrated chip is core, form intelligent charging control system, by the real time sample of every battery core charging voltage is detected, adopt single-point feedback circuit, make every battery core when charging, automatically carry out constant current constant voltage conversion, guarantee that every battery core reaches after 4.3 volts of charging voltages, with 300 milliamperes of current cut-off chargings, thereby realized single-point single control when lithium battery group is charged, make the power supply capacity of energy-storage units optimum.Its basic control circuit as shown in Figure 2.
2, welding current control system
Discharge loop adopts 350 amperes of solid-state relays as switch block, by voltage, current detection circuit monitoring discharge current,
The variation of voltage, after detection battery pack output voltage is lower than 2.8 volts, delay circuit starts, and after 5 seconds, voltage is as do not returned to more than 2.8 volts, and relay starts, and disconnects discharge loop, to prevent from putting the lithium battery group causing, damages.When detecting electric current higher than 300 ampere-hours, relay starts, and disconnects discharge loop, prevents internal circuit and battery pack damage that overload causes.Its basic circuit principle as shown in Figure 3.
3, arc-welding generating means
Dc chopper (D.C. Chopper) is called again chopper, it is by the fixing direct current of magnitude of voltage, be converted to the variable continuous-current plant of magnitude of voltage, that a kind of direct current is to the converter of direct current (DC to DC Converter), this technology maturation is stable, in fields such as electric machine speed regulation control, resistance trimming, excitations, is widely used.The feature of the starting the arc mode of welding machine is: utilize by chopping switch, inductance, fly-wheel diode forms chopper circuit, the high current characteristic smooth direct current of the low pressure electricity that has of lithium battery group output is converted into the dc source with decline external characteristics, by pulse width modulation mode, respond welding terminal and when switching on and off, produce huge voltage change, the electric arc that ignites when the instantaneous short circuit of the two poles of the earth, utilizes the electric arc producing to come consumable electrode and wlding, the cooling object that makes their combinations that reached afterwards.Its basic circuit principle as shown in Figure 4.
The implementation of this novel practical technology be in housing lithium battery group, discharge and recharge control panel, cut-out relay, arc-welding generator and be linked in sequence, it is characterized in that: lithium battery group is by discharging and recharging 48 volts of control panel outputs, 300 amperes of constant current dc sources, the arc-welding generator that connection is comprised of chopping switch, fly-wheel diode and inductance, the safety protection circuit that electrical equipment forms is succeeded in loop, forms non-inverse type DC arc welder.
accompanying drawing explanation:
(course of work accompanying drawings of this novel practical technology is as follows)
To be that built-in lithium battery is portable form structural representation from net type DC arc welder to Fig. 1, and Fig. 2 is lithium battery group and charge control system, and Fig. 3 is welding current control system, and Fig. 4 is arc-welding generating means.
the specific embodiment:
During the charging of lithium battery group, as shown in Figure 2, opening power master switch (1), control system (2) startup work, the adhesive of charging control relay (3) (4), open charging control switch (5), constant-current charge loop (7) are connected, 220 volts of civil powers of charger device (6) access, be converted into 60 volts/3 amperes direct currents, for energy-storage lithium battery group (8), carry out constant-current charge, now display module (9) shows current charged state, and shows battery voltage.When voltage acquisition module (10) all cell voltages that collect all reach 4.3 volts, control system (2) control relay (3) that will charge cuts out, constant-current charge loop (7) disconnects, the electric current of power supply adaptor (2) output will be 55.9 volts by transformer (11) step-down, and by constant-voltage charge loop (12), continue as energy-storage lithium battery group (8) and carry out constant-voltage charge.When the detected charging current of current sensor (12) drops to 300 milliamperes, control system (2) control relay (4) that will charge cuts out, and cuts off all charge circuits, and now display module (9) shows that charging finishes.
During lithium battery group powered operation, as shown in Figure 3, open master switch (1) control system (2) startup work, control of discharge relay (3) adhesive, energy-storage lithium battery group (4) is arc-welding generator (6) power supply by discharge loop (5), now soldering turret (7) can carry out weld job, and display module (8) shows work at present state, and shows battery voltage.When voltage acquisition module (9) a certain batteries voltage drop to 2.8 in the energy-storage lithium battery group that collects (4) volt while continuing 5 seconds, control system (2) is closed control of discharge relay (3), cut off discharge loop (5), now display module (8) shows low voltage warning, prompting charging.When cell voltage returns to higher than 2.8 volts and while continuing 30 seconds, control of discharge relay (3) recovers adhesive, and discharge loop (5) recloses, and welding machine is task again.When the detected discharge current of current sensor (12) surpasses to 300 amperes, control system (2) is closed control of discharge relay (3), and now display module (8) shows overcurrent protection, and prompting is restarted.
During weld job, as shown in Figure 4, lithium battery group discharge loop is powered to arc-welding generator (1), power supply average voltage is 48 volts, the current rectifying and wave filtering circuit (2) of the electric current of access arc-welding generator through being formed by isolating diode and reactor, by the chopper (4) of being controlled by main control module (3), be converted to and be not less than the DC pulse current that 50 KHzs have the outer feature that declines, the pulse direct current of output is via capacitor (5), the keep-alive circuit (7) that IGCT (6) forms, and by providing time modulus by main control module (3), chopper (4) and IGCT (6) are carried out conducting and turn-off control, charge and discharge in conjunction with capacitor (5), so that back ground current to be provided, realize the smooth combustion of electric current.
The invention has the beneficial effects as follows and take built-in lithium battery group as power supply unit, utilize direct current DC converting circuit, the direct current of lithium battery group output is converted into the outer feature welding current of decline with steady constant current feature, thereby, saved inversion direct current welding machine by AC-DC, direct current becomes midfrequent AC, midfrequent AC becomes the process of stable state direct current, secondary transformer and relevant control circuit have been reduced, improved Energy Efficiency Ratio, greatly reduce the weight and volume of equipment, equip the built-in DC welder gross weight of lithium electricity of 1200 watt-hours not higher than 9 kilograms, volume is only 0.03 cubic metre, and kept the welding effect of existing inversion direct current welding machine.For outdoor emergency, the needed metal solder operation of rushing to repair, speedily carry out rescue work provides a kind of and has been easy to carry, conveniently moving, energy-conserving and environment-protective Novel welding apparatus.
Claims (4)
1.
a kind of built-in lithium battery group portable from net type DC arc welder, in housing lithium battery group, discharge and recharge control panel, cut-out relay, arc-welding generator and be linked in sequence, it is characterized in that: lithium battery group is by discharging and recharging 48 volts of control panel outputs, 300 amperes of constant current dc sources, the arc-welding generator that connection is comprised of chopping switch, fly-wheel diode and inductance, the safety protection circuit that electrical equipment forms is succeeded in loop, forms non-inverse type DC arc welder.
2.
dC arc welder according to claim 1, the feature of its power unit is: adopt lithium battery group as power supply unit, take EG4313 chip as core control element, by the real time sample of every battery core charging voltage is detected, adopt single-point feedback circuit, make every battery core automatically carry out constant current constant voltage conversion when charging, guarantee that every battery core reaches after 4.3 volts of charging voltages, with 300 milliamperes of current cut-off chargings, thereby realized single-point single control when lithium battery group is charged.
3.
dC arc welder according to claim 1, the controlling feature of its operating current is: adopt 350 amperes of solid-state relays as switch block, by the variation of voltage, current detection circuit monitoring discharge current, voltage, after detection battery pack output voltage is lower than 2.8 volts, delay circuit starts, after 5 seconds, voltage is as do not returned to more than 2.8 volts, and relay starts, disconnect discharge loop, when detecting electric current higher than 300 ampere-hours, relay starts, and disconnects discharge loop.
4.
dC arc welder according to claim 1, the feature of its machine initial arc mode is: utilize by chopping switch, inductance, fly-wheel diode forms chopper circuit, the high current characteristic smooth direct current of the low pressure electricity that has of lithium battery group output is converted into the dc source with decline external characteristics, by pulse width modulation mode, respond welding terminal and when switching on and off, produce huge voltage change, electric arc ignites when the instantaneous short circuit of the two poles of the earth, utilize the electric arc producing to come consumable electrode and wlding, the cooling object that makes their combinations that reached afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420069553.8U CN203843347U (en) | 2014-02-18 | 2014-02-18 | Portable off-grid type direct-current arc welding machine with built-in lithium battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420069553.8U CN203843347U (en) | 2014-02-18 | 2014-02-18 | Portable off-grid type direct-current arc welding machine with built-in lithium battery pack |
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| CN203843347U true CN203843347U (en) | 2014-09-24 |
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| CN201420069553.8U Expired - Fee Related CN203843347U (en) | 2014-02-18 | 2014-02-18 | Portable off-grid type direct-current arc welding machine with built-in lithium battery pack |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384689A (en) * | 2014-11-07 | 2015-03-04 | 苏州中元动力科技有限公司 | Ternary lithium cell electric welder and control method thereof |
| CN105921853A (en) * | 2016-07-06 | 2016-09-07 | 北京信息科技大学 | Micro thermocouple welding machine |
| CN106077897A (en) * | 2016-07-13 | 2016-11-09 | 苏州新逸喆电子科技有限公司 | A kind of portable mobile wireless electric welding machine |
| CN107470746A (en) * | 2017-09-25 | 2017-12-15 | 陈炳周 | Low current input, the energy storage of High-current output release condenser discharge welder |
| CN108788574A (en) * | 2018-09-11 | 2018-11-13 | 深圳市川瑞贝科技有限公司 | Electric welding machine automatic shutdown circuitry and automatic shutdown method |
| WO2021179604A1 (en) * | 2020-03-11 | 2021-09-16 | 南京力骏新能源储能研究院有限公司 | Method for adjusting working current of lithium electric welding machine |
-
2014
- 2014-02-18 CN CN201420069553.8U patent/CN203843347U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384689A (en) * | 2014-11-07 | 2015-03-04 | 苏州中元动力科技有限公司 | Ternary lithium cell electric welder and control method thereof |
| CN105921853A (en) * | 2016-07-06 | 2016-09-07 | 北京信息科技大学 | Micro thermocouple welding machine |
| CN106077897A (en) * | 2016-07-13 | 2016-11-09 | 苏州新逸喆电子科技有限公司 | A kind of portable mobile wireless electric welding machine |
| CN107470746A (en) * | 2017-09-25 | 2017-12-15 | 陈炳周 | Low current input, the energy storage of High-current output release condenser discharge welder |
| CN108788574A (en) * | 2018-09-11 | 2018-11-13 | 深圳市川瑞贝科技有限公司 | Electric welding machine automatic shutdown circuitry and automatic shutdown method |
| WO2021179604A1 (en) * | 2020-03-11 | 2021-09-16 | 南京力骏新能源储能研究院有限公司 | Method for adjusting working current of lithium electric welding machine |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20200218 |
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| CF01 | Termination of patent right due to non-payment of annual fee |