CN110829545B - Floating charging system and method for storage battery of generator set and generator set - Google Patents
Floating charging system and method for storage battery of generator set and generator set Download PDFInfo
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- CN110829545B CN110829545B CN201911257920.0A CN201911257920A CN110829545B CN 110829545 B CN110829545 B CN 110829545B CN 201911257920 A CN201911257920 A CN 201911257920A CN 110829545 B CN110829545 B CN 110829545B
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Abstract
The invention discloses a floating charging system and method for a storage battery of a generator set and the generator set, wherein the floating charging system comprises a floating charging power supply loop; the floating charge power supply loop comprises a mains supply branch connected with mains supply, a unit power supply branch connected with the generator set, a relay and a floating charge power supply module connected with the storage battery; the normally closed contact of the relay is connected in series between the mains supply branch and the floating charge power supply module; a normally open contact of the relay is connected in series between the unit power supply branch and the floating charge power supply module; and a coil of the relay is connected with the generating set or a voltage-building signal output end of the generating set controller. The floating charging method is a using method of the floating charging system, when the unit works, the unit charges the storage battery, and when the unit does not work, the commercial power charges the storage battery; the generator set comprises a generator, an engine, a generator set controller, a storage battery and the floating charging system. The invention has simple structure, and can optimally control the charging process and the charging current of the storage battery so as to prolong the service life of the storage battery.
Description
Technical Field
The invention belongs to the technical field of generator set charging, and particularly relates to a generator set storage battery floating charging system and method and a generator set.
Background
The generator set mainly comprises an engine (providing kinetic energy), a generator (generating current) and a control system, wherein the core of the control system is a generator set controller; the unit controller is a centralized monitoring protection unit for the generator set, and can control the functions of starting, running, stopping, preheating, pre-supplying oil, switching on and switching off the brake and the like of the generator set, detect and display various parameters (including generator parameters, engine parameters and the like) of the generator set, process the detected data, send out alarm and stop protection, and achieve the purposes of automatic protection and control of the generator set. The technical scheme of the existing generator set for charging the storage battery is shown in fig. 1, in order to realize the charging function of the generator set on the storage battery 1, a charging generator is installed on the generator set, when the generator set runs, an engine drives the charging generator to run by means of a belt transmission mechanism, after external excitation, the charging generator generates electricity to output alternating-current voltage, and the direct-current voltage is output through a rectification voltage regulating module (see fig. 2, a rectification circuit 2 and a voltage regulator 3) arranged in a charger to further charge the storage battery 1.
When the charging generator is installed, a belt transmission mechanism needs to be installed, a support needs to be used, the occupied space is large, and the cost is high; meanwhile, because the voltage regulation control circuit of the charging generator is simpler, the output voltage is a voltage value which is stably higher than the nominal voltage of the storage battery, the charging current curve is shown in figure 3, and the charging current is inversely proportional to the battery capacity. When the capacity of the storage battery is insufficient, the charging current is large and measures are taken infinitely, and the phenomena of lead acid salinization, heating and water loss of the storage battery are easily caused by overlarge current; when the storage battery is full of capacity, the floating charge is higher, the supplementary current is larger, the corrosion of the positive plate of the storage battery is aggravated, the phenomena of frequent exhaust, water loss and high temperature of the storage battery are caused, the service life of the storage battery is shortened under the two conditions, and the deformation and the expansion of the storage battery groove caused by thermal runaway of the storage battery are caused under the condition that the storage battery is high, so that the battery fails. In short, the charging generator cannot optimally control the charging process and the charging current of the storage battery so as to prolong the service life of the storage battery.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and the technical problem to be solved by the invention is to provide a floating charging system and method for a storage battery of a generator set and the generator set, which have simple structures and can optimally control the charging process and the charging current of the storage battery so as to prolong the service life of the storage battery.
In order to solve the technical problem, in a first aspect, an embodiment of the present invention provides a floating charging system for a storage battery of a generator set, where the storage battery is used to provide power for a set controller and a starter motor in the generator set; the storage battery floating charging system comprises a floating charging power supply loop used for charging the storage battery; the floating charge power supply loop comprises a mains supply branch connected with mains supply, a unit power supply branch connected with the power output end of the generator unit, a relay and a floating charge power supply module connected with the storage battery;
the normally closed contact of the relay is connected in series between the mains supply branch and the floating charge power supply module; the normally open contact of the relay is connected in series between the unit power supply branch and the floating charge power supply module; the coil of the relay is connected with the power output end or the voltage-building signal output end of the unit controller;
the floating charging power supply module comprises a rectifying and filtering circuit unit, a DC-DC converter, a filtering output circuit unit, a charging current and voltage detection circuit unit and a main control unit; the rectification filter circuit unit, the DC-DC converter and the filter output circuit unit are electrically connected in sequence, and the main control unit is electrically connected with the DC-DC converter and the charging current and voltage detection circuit unit respectively; the charging current and voltage detection circuit unit comprises a voltage detection circuit, a current detection circuit and an I-U conversion circuit; the voltage detection circuit and the current detection circuit are both electrically connected with the output end of the filter output circuit, and the I-U conversion circuit is connected with the current detection unit in series; the main control unit comprises a crystal oscillator circuit, an amplifying circuit and a PWM (pulse width modulation) circuit; the PWM modulation circuit is electrically connected with the crystal oscillator circuit and the amplifying circuit;
the PWM modulation circuit is electrically connected with the DC-DC converter, one input end of the amplifying circuit is electrically connected with the voltage detection circuit, and the other input end of the amplifying circuit is electrically connected with the I-U conversion circuit.
Furthermore, a fuse, a circuit breaker or a fuse is connected in the branch of the mains supply in series; and a fuse, a circuit breaker or a fuse is connected in the power branch of the unit in series.
In a second aspect, the embodiment of the invention provides a floating charging method for a generator set storage battery, which uses the floating charging system for the generator set storage battery; the float charging method comprises the following steps:
when the generator set is in a shutdown state, a coil of the relay is not electrified, the commercial power supply branch is conducted, and the generator set power supply branch is disconnected; the commercial power supplies alternating current power to the floating charge power supply module through the normally closed contact, and the floating charge power supply module charges the storage battery;
when the generator set is in a starting operation state, a coil of the relay is electrified, the commercial power supply branch is disconnected, and the generator set power supply branch is connected; the generator set provides an alternating current power supply for the floating charge power supply module, and the floating charge power supply module charges the storage battery;
the floating charging power supply module has three charging processes, wherein the first process is rapid charging, the charging current is constant, and the charging voltage of the storage battery is gradually increased along with the charging of the current; the second process is an equalizing charge stage, the charging current is reduced, and the charging voltage is constant; and in the third process, the storage battery is subjected to floating charging according to the voltage lower than that in the previous process, the charging current is floating charging current, and the floating charging process can meet the unit electric energy consumption and the self discharging consumption of the storage battery.
In a second aspect, an embodiment of the present invention provides a generator set, including a generator, an engine, a set controller, a starter motor, and a storage battery, where the generator and the engine are both electrically connected to the set controller, and the set controller and the starter motor are both electrically connected to the storage battery; the floating charging system of the generator set storage battery is also included; the unit power supply branch is connected with a power supply output end and a zero line end of the generator.
Further, the generator set also comprises a current detection circuit and a voltage detection circuit which are used for detecting the output current and the output voltage of the generator, and a starting power supply circuit which is used for providing starting power supply for the generator set controller; the current detection circuit and the voltage detection circuit are both electrically connected with the unit controller; the starting power supply circuit is electrically connected with the storage battery;
a circuit breaker, a fuse or a fuse is connected in the voltage detection circuit in series, and a starting switch and the fuse are connected on the starting power supply circuit in series;
and three power output ends of the generator are connected with a unit load circuit breaker in series.
After the technical scheme is adopted, the invention has the beneficial effects that:
the floating charging system for the storage battery of the generator set comprises a floating charging power supply loop for charging the storage battery; the floating charge power supply loop comprises a mains supply branch connected with mains supply, a unit power supply branch connected with a power output end of the generator unit, a relay and a floating charge power supply module connected with the storage battery; the normally closed contact of the relay is connected in series between the mains supply branch and the floating charge power supply module; a normally open contact of the relay is connected in series between the unit power supply branch and the floating charge power supply module; and a coil of the relay is connected with the power output end or the voltage-building signal output end of the unit controller. The floating charging method of the generator set storage battery is a using method of the floating charging system. The generator set comprises a generator, an engine, a generator set controller, a starting motor, a storage battery and the floating charging system of the storage battery of the generator set.
When the generator set normally works to generate electricity, the generator set charges the storage battery and performs floating charging; when the generator set stops, the commercial power charges the storage battery and performs floating charging; the floating charging power module and the two power supply modes are switched to optimally control the charging process and the charging current of the storage battery, so that the service life of the storage battery is prolonged.
Drawings
FIG. 1 is a schematic block diagram of a prior art generator set battery charging apparatus;
FIG. 2 is a schematic diagram of the internal circuitry of the charge generator of FIG. 1;
FIG. 3 is a graph of the current of FIG. 2 undergoing charging;
FIG. 4 is a functional block diagram of a first embodiment of the genset of the present invention;
FIG. 5 is a schematic diagram of the structure of a float charge power module;
FIG. 6 is a graph of the current of FIG. 5 undergoing charging;
FIG. 7 is a block flow diagram of a generator set battery float charging method of the present invention;
FIG. 8 is a functional block diagram of a second embodiment of the genset in accordance with the present invention;
in the figure: 1-a storage battery, 2-a rectifying circuit, 3-a voltage regulator, 4-a floating charge power circuit, 5-a floating charge power module, 6-a mains supply branch, 7-a unit power branch, 8-a voltage detection circuit, 9-a current detection circuit and 10-a starting power circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first embodiment is as follows:
as shown in fig. 4, the present embodiment discloses a generator set, which includes a generator, an engine, a set controller, a starter motor and a storage battery 1, wherein the generator and the engine (engine ECU) are electrically connected to the set controller, and the set controller and the starter motor are electrically connected to the storage battery 1; the generator set controller also comprises a generator set storage battery floating charging system, a current detection circuit 9 and a voltage detection circuit 8 which are used for detecting the output current and the output voltage of the generator, and a starting power supply circuit 10 which is used for providing starting power supply for the generator set controller; the current detection circuit 9 and the voltage detection circuit 8 are both electrically connected with the unit controller; the starting power supply circuit 10 is electrically connected with the storage battery 1; the voltage detection circuit 8 is connected in series with circuit breakers QF 2-QF 4, or a fuse replaces the circuit breakers QF4, and the starting power circuit 10 is connected in series with a starting switch SA1 and a fuse QF 7; the three power outputs U, V, W of the generator (equivalent to U1, V1, W1) are connected in series with the unit load breaker QF 1.
In this embodiment, the floating charging system for the storage battery of the generator set comprises a floating charging power supply loop 4 for charging the storage battery 1; the floating charge power supply loop 4 comprises a mains supply branch 6 connected with mains supply, a unit power supply branch 7 connected with the power output end of a generator set, a relay KA2 and a floating charge power supply module 5 connected with the storage battery 1; specifically, the unit power branch 7 is connected with a power output end U (end U1) and a zero line end N1 (equal to end N) of the generator. A normally closed contact of the relay KA2 is connected in series between the mains supply branch 6 and the floating charge power module 5; a normally open contact of the relay KA2 is connected in series between the unit power branch 7 and the floating charge power module 5; the coil of the relay KA2 is connected with a voltage-build signal output end of the unit controller.
As shown in fig. 5, in this embodiment, the floating charge power supply module 5 includes a rectifying and filtering circuit unit, a DC-DC converter, a filtering output circuit unit, a charging current and voltage detection circuit unit, and a main control unit; the rectification filter circuit unit, the DC-DC converter and the filter output circuit unit are electrically connected in sequence, and the main control unit is electrically connected with the DC-DC converter and the charging current and voltage detection circuit unit respectively. The charging current and voltage detection circuit unit comprises a voltage detection circuit, a current detection circuit and an I-U conversion circuit.
The main control unit comprises a crystal oscillator circuit, an amplifying circuit and a PWM (pulse width modulation) circuit; the PWM modulation circuit is electrically connected with the crystal oscillator circuit and the amplifying circuit. The main control unit may adopt model UC3906N (package 16 PDIP).
As shown in fig. 6, the floating charge power module 5 may have three charging processes. The first process is fast charging, the charging current is constant in this stage, and the storage battery 1 is gradually increased along with the charging of the current. This process is constant in charging current; the second process is an equalizing charge stage, the charging current is reduced, and the charging voltage is constant; in the third process, the storage battery 1 is float-charged according to the float-charging voltage lower than that in the previous process, the charging current is the float-charging current, and the float-charging process can meet the unit power consumption and the self discharging consumption of the storage battery 1.
The floating charge power module 5 may also be model ATC138-27R 605.
In this embodiment, a circuit breaker QF5 is connected in series in the utility power branch 6, and a circuit breaker QF6 is connected in series in the unit power branch 7; the circuit breakers QF5, QF6 may each be replaced by a fuse or fuse.
As shown in fig. 7, the present embodiment further discloses a floating charging method for a generator set storage battery, which uses the floating charging system for a generator set storage battery; the float charging method comprises the following steps:
when the generator set is in a stop state, a coil of the relay KA2 is not electrified, the commercial power supply branch 6 is conducted, and the generator set power supply branch 7 is disconnected; the commercial power supplies alternating current power to the floating charge power supply module 5 through the normally closed contact, and the floating charge power supply module 5 charges the storage battery 1.
When the generator set is in a starting operation state, a coil of the relay KA2 is electrified, the commercial power supply branch circuit 6 is disconnected, and the generator set power supply branch circuit 7 is connected; the generator set provides alternating current power supply for the floating charge power supply module 5, and the floating charge power supply module 5 charges the storage battery 1.
The charging process and the charging current of the storage battery 1 can be optimally controlled by utilizing the floating charging power module 5 and the switching of the two power supply modes, so that the service life of the storage battery is prolonged.
Example two:
as shown in fig. 8, this embodiment discloses another generator set, and the difference between this embodiment and the first embodiment is that the floating charging system of the storage battery of the generator set is different; the method specifically comprises the following steps:
in this embodiment, the coil of the relay KA2 is connected to the power output terminal U (equivalent to the terminal U1) and the neutral terminal N (equivalent to the terminal N1) of the generator.
Compared with the prior art, the invention eliminates a charging generator and a belt transmission mechanism; the structure of the generator set is simplified, and the floating charging system of the storage battery of the generator set can optimally control the charging process and the charging current of the storage battery so as to prolong the service life of the storage battery. Meanwhile, after the unit is shut down, emergency charging of the storage battery can be met.
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made. Any modification and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A genset battery float charging system, the battery to provide power to a genset controller and a starter motor in the genset; the floating charging system of the storage battery is characterized by comprising a floating charging power supply loop used for charging the storage battery; the floating charge power supply loop comprises a mains supply branch connected with mains supply, a unit power supply branch connected with the power output end of the generator unit, a relay and a floating charge power supply module connected with the storage battery;
the generator set power branch is correspondingly connected with a power output end U and a zero line end N1 of a generator in the generator set; the normally closed contact of the relay is connected in series between the mains supply branch and the floating charge power supply module; the normally open contact of the relay is connected in series between the unit power supply branch and the floating charge power supply module; the coil of the relay is connected with the power output end or the voltage-building signal output end of the unit controller;
the floating charging power supply module comprises a rectifying and filtering circuit unit, a DC-DC converter, a filtering output circuit unit, a charging current and voltage detection circuit unit and a main control unit; the rectification filter circuit unit, the DC-DC converter and the filter output circuit unit are electrically connected in sequence, and the main control unit is electrically connected with the DC-DC converter and the charging current and voltage detection circuit unit respectively; the charging current and voltage detection circuit unit comprises a voltage detection circuit, a current detection circuit and an I-U conversion circuit, wherein the voltage detection circuit and the current detection circuit are both electrically connected with the output end of the filter output circuit, and the I-U conversion circuit is connected with the current detection circuit in series; the main control unit comprises a crystal oscillator circuit, an amplifying circuit and a PWM (pulse width modulation) circuit; the PWM modulation circuit is electrically connected with the crystal oscillator circuit and the amplifying circuit;
the PWM modulation circuit is electrically connected with the DC-DC converter, one input end of the amplifying circuit is electrically connected with the voltage detection circuit, and the other input end of the amplifying circuit is electrically connected with the I-U conversion circuit.
2. The genset battery float charging system of claim 1 wherein a fuse, circuit breaker or fuse is connected in series in the utility power branch; and a fuse, a circuit breaker or a fuse is connected in the power branch of the unit in series.
3. A floating charging method for a generator set storage battery, which is characterized in that the floating charging system for the generator set storage battery of any one of claims 1 or 2 is used, and the floating charging method comprises the following steps:
when the generator set is in a shutdown state, a coil of the relay is not electrified, the commercial power supply branch is conducted, and the generator set power supply branch is disconnected; the commercial power supplies alternating current power to the floating charge power supply module through the normally closed contact, and the floating charge power supply module charges the storage battery;
when the generator set is in a starting operation state, a coil of the relay is electrified, the commercial power supply branch is disconnected, and the generator set power supply branch is connected; the generator set provides an alternating current power supply for the floating charge power supply module, and the floating charge power supply module charges the storage battery;
the floating charging power supply module has three charging processes, wherein the first process is rapid charging, the charging current is constant, and the charging voltage of the storage battery is gradually increased along with the charging of the current; the second process is an equalizing charge stage, the charging current is reduced, and the charging voltage is constant; and in the third process, the storage battery is subjected to floating charging according to the voltage lower than that in the previous process, the charging current is floating charging current, and the floating charging process can meet the unit electric energy consumption and the self discharging consumption of the storage battery.
4. A generator set comprising a generator, an engine, a set controller, a starter motor, and a battery, the generator and the engine each being electrically connected to the set controller, the set controller and the starter motor each being electrically connected to the battery; the floating charging system for the storage battery of the generator set is characterized by further comprising the floating charging system for the storage battery of the generator set according to any one of the claims 1 or 2; the unit power supply branch is connected with a power supply output end and a zero line end of the generator.
5. The generator set of claim 4, further comprising current and voltage detection circuits for detecting output currents, output voltages of the generators and a startup power circuit for providing startup power to the set controller; the current detection circuit and the voltage detection circuit are both electrically connected with the unit controller; the starting power supply circuit is electrically connected with the storage battery;
a circuit breaker, a fuse or a fuse is connected in the voltage detection circuit in series, and a starting switch and the fuse are connected on the starting power supply circuit in series;
and three power output ends of the generator are connected with a unit load circuit breaker in series.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911257920.0A CN110829545B (en) | 2019-12-10 | 2019-12-10 | Floating charging system and method for storage battery of generator set and generator set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911257920.0A CN110829545B (en) | 2019-12-10 | 2019-12-10 | Floating charging system and method for storage battery of generator set and generator set |
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| CN110829545A CN110829545A (en) | 2020-02-21 |
| CN110829545B true CN110829545B (en) | 2021-10-22 |
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| CN112177786B (en) * | 2020-08-19 | 2022-11-29 | 潍柴动力股份有限公司 | Large-cylinder-diameter engine unit system and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0583879A (en) * | 1991-09-18 | 1993-04-02 | Shin Kobe Electric Mach Co Ltd | Method and apparatus for charging storage battery |
| CN201345554Y (en) * | 2008-12-25 | 2009-11-11 | 广东康菱动力科技有限公司 | Direct-current control system of integrated diesel generating set of relay |
| CN201656536U (en) * | 2010-04-12 | 2010-11-24 | 郑州众智电子设备有限公司 | Automatic floating charger of generator set storage battery |
| CN206972420U (en) * | 2017-07-19 | 2018-02-06 | 飞尔特能源(东莞)有限公司 | A kind of generating set double cell set control system |
| CN109149716A (en) * | 2018-09-27 | 2019-01-04 | 江苏瑞昌哥尔德发电设备股份有限公司 | A kind of uninterrupted charging unit of battery for diesel generating set |
-
2019
- 2019-12-10 CN CN201911257920.0A patent/CN110829545B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0583879A (en) * | 1991-09-18 | 1993-04-02 | Shin Kobe Electric Mach Co Ltd | Method and apparatus for charging storage battery |
| CN201345554Y (en) * | 2008-12-25 | 2009-11-11 | 广东康菱动力科技有限公司 | Direct-current control system of integrated diesel generating set of relay |
| CN201656536U (en) * | 2010-04-12 | 2010-11-24 | 郑州众智电子设备有限公司 | Automatic floating charger of generator set storage battery |
| CN206972420U (en) * | 2017-07-19 | 2018-02-06 | 飞尔特能源(东莞)有限公司 | A kind of generating set double cell set control system |
| CN109149716A (en) * | 2018-09-27 | 2019-01-04 | 江苏瑞昌哥尔德发电设备股份有限公司 | A kind of uninterrupted charging unit of battery for diesel generating set |
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