CN219659443U - Inter-battery charging system of lead-acid battery - Google Patents
Inter-battery charging system of lead-acid battery Download PDFInfo
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- CN219659443U CN219659443U CN202223580397.5U CN202223580397U CN219659443U CN 219659443 U CN219659443 U CN 219659443U CN 202223580397 U CN202223580397 U CN 202223580397U CN 219659443 U CN219659443 U CN 219659443U
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- 238000000429 assembly Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model relates to a battery charging system, in particular to an inter-battery charging system of a lead-acid battery; the battery charging device is suitable for charging two groups of batteries connected in parallel; the first charging circuit is connected between two groups of batteries; the second charging circuit is connected between the two groups of batteries and is connected with the first charging circuit in parallel; the control unit is respectively connected with the first charging circuit, the second charging circuit and each group of batteries; the advantages are that: the utility model adjusts the charging current and the charging voltage of the battery in real time, can charge with large current, improves the charging efficiency and reduces the charging time; meanwhile, according to the charging condition, the boost charging is carried out, so that the full charging of the rechargeable battery is ensured.
Description
Technical Field
The utility model relates to a battery charging system, in particular to an inter-battery charging system of a lead-acid battery.
Background
The storage battery charger converts alternating-current electric energy into direct current through a high-frequency switching power supply technology, so that a charging characteristic curve is optimized, and the service life of the storage battery is effectively prolonged. In some use environments, there is no ac power around, and charging between two sets of batteries is achieved by two schemes: 1) The two groups of batteries are directly connected in parallel for direct charging; 2) A group of batteries are connected with a direct current-to-alternating current device (inverter), and the inverter receives a direct current power supply of the batteries and outputs alternating current for a storage battery charger to charge the other group of batteries;
when the voltages of the two groups of batteries are different greatly, the initial current is large according to the ohm theorem, larger stress and heat are generated, and the service life of the batteries is influenced; the two groups of batteries are charged in parallel, the voltages of the last two groups of batteries are equal, no voltage difference exists, no current flows, and the two groups of batteries are in an insufficient electric quantity state and cannot be guaranteed to be in a full-charge state.
Disclosure of Invention
The utility model aims to provide an inter-battery charging system of a lead-acid battery, which solves the technical problems.
The technical problems solved by the utility model can be realized by adopting the following technical scheme:
an inter-battery charging system of a lead-acid battery is suitable for charging two groups of batteries connected in parallel; comprising the steps of (a) a step of,
the first charging circuit is connected between the two groups of batteries;
the second charging circuit is connected between the two groups of batteries and is connected with the first charging circuit in parallel;
and the control unit is respectively connected with the first charging circuit, the second charging circuit and each group of batteries.
Preferably, the two sets of batteries include a set of main batteries and a set of sub-batteries;
the first charging circuit includes:
the input end of the first charging module is connected with the main battery, and the output end of the first charging module is connected with the auxiliary battery;
the input end of the first switch module is connected to the control unit, and the output end of the first switch module is connected to the control end of the first charging module.
Preferably, the first charging module includes:
the drain electrode of the first MOS tube is connected to the main battery, the source electrode of the first MOS tube is connected to the auxiliary battery through a diode, the grid electrode of the first MOS tube is connected to the control end of the first charging module, and a first parasitic diode is arranged between the drain electrode and the source electrode;
and the first resistor is connected between the main battery and the control end of the first charging module.
Preferably, the first switch module includes:
the base electrode of the first triode is connected to the control unit through a second resistor, the collector electrode of the first triode is connected to the control end of the first charging module through a third resistor, and the emitter electrode of the first triode is grounded;
and one end of the fourth resistor is connected between the second resistor and the base electrode of the first triode, and the other end of the fourth resistor is grounded.
Preferably, the two sets of batteries include a set of main batteries and a set of sub-batteries;
the second charging circuit may comprise a circuit configured to charge the battery,
the input end of the second charging module is connected with the main battery, and the output end of the second charging module is connected with the auxiliary battery;
the input end of the first control module is connected to the control unit, and the output end of the first control module is connected to the first control end of the second charging module;
the input end of the second control module is connected to the control unit, and the output end of the second control module is connected to the second control end of the second charging module.
Preferably, the second charging module includes:
the drain electrode of the second MOS tube is connected to the main battery, the source electrode of the second MOS tube is connected to a first node through an inductor, the grid electrode of the second MOS tube is connected to the first control end of the second charging module, a second parasitic diode is arranged between the drain electrode and the source electrode, and the drain electrode of the second MOS tube is connected to the first control end of the second module through a tenth resistor;
a backflow preventing diode connected between the first node and the sub-battery;
one end of the second control end is connected to the first node, and the other end of the second control end is connected to the output end of the second control module.
Preferably, the first control module includes:
and the base electrode of the second triode is connected to the control unit through a fifth resistor, the collector electrode of the second triode is connected to the first control end of the second charging module through a sixth resistor, and the emitter electrode of the second triode is grounded.
Preferably, the second control module includes:
the grid electrode of the third MOS tube is connected to the control unit through a seventh resistor, the drain electrode of the third MOS tube is connected to the second control end of the second charging module, and the source electrode of the third MOS tube is grounded through an eighth resistor;
and one end of the ninth resistor is connected between the seventh resistor and the grid electrode of the third MOS tube, the other end of the ninth resistor is connected between the eighth resistor and the source electrode of the third MOS tube, and a third parasitic diode is arranged between the drain electrode and the source electrode.
Preferably, the anti-backflow diode is formed by connecting two diode assemblies in parallel.
The beneficial effects are that: by adopting the technical scheme, the utility model can adjust the charging current and the charging voltage of the battery in real time, so that the high-current charging can be realized, the charging efficiency is improved, and the charging time is reduced; meanwhile, boost charging is carried out according to the charging condition, so that the rechargeable battery is ensured to be fully charged. The novel charging safety between batteries is improved, the charging effect is guaranteed, the charging efficiency is improved, and the charging cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the current flow of the present utility model;
FIG. 2 is a schematic diagram of a first charging circuit according to the present utility model;
FIG. 3 is a schematic diagram of a second charging circuit according to the present utility model;
reference numerals: 1. a first charging circuit; 2. a second charging circuit; 3. a main battery; 4. a sub-battery; 5. a first charging module; 6. a first switch module; 7. a second charging circuit; 8. a second charging module; 9. a first control module; 10. a second control module; 11. a first node; 12. a first control end; 13. a second control end; 14. and a control unit.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
The utility model is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
An inter-battery charging system of a lead-acid battery is suitable for charging two groups of batteries connected in parallel; as shown in fig. 1, including,
the first charging circuit 1, as shown in fig. 2, is connected between two sets of batteries;
the second charging circuit 2, as shown in fig. 3, is connected between two sets of batteries and is connected in parallel with the first charging circuit 1;
a control unit 14 connected to the first charging circuit 1, the second charging circuit 2, and each group of batteries, respectively;
the control unit 14 performs voltage and current parameter configuration according to key input, sets a set value, detects the voltages of the two groups of batteries, controls the batteries to charge, compares the voltage data acquired in real time with the set value, and when the voltage of the main battery 3 is greater than or equal to the set value, turns on the first charging circuit 1 to block the second charging circuit 2, wherein the first charging circuit is a high-current BULK circuit; when the voltage of the main battery 3 is smaller than a set value, the second charging circuit 2 is conducted to block the first charging circuit 1, and the second conducting circuit 2 is a BOOST circuit;
when the control unit 14 detects a failure, it performs an interrupt charge and displays a failure alarm.
It should be noted that, in the present utility model, the functions of voltage detection, voltage comparison, fault alarm display, etc. of the control unit are all implemented by using the prior art, and the present utility model only aims at how the whole circuit system works when the control unit outputs the corresponding control instruction, that is, the control unit itself is not included in the protection scope of the present utility model.
Specifically, the two sets of batteries include a set of main batteries 3 and a set of sub-batteries 4;
the first charging circuit 1 includes:
the input end of the first charging module 5 is connected with the main battery 3, and the output end of the first charging module 5 is connected with the auxiliary battery 4;
the input end of the first switch module 6 is connected to the control unit 14, and the output end of the first switch module 6 is connected to the control end of the first charging module 5;
the first charging circuit 1 charges the sub-battery 4 with a large current, and as the voltage of the sub-battery 4 increases, the voltage of the main battery 3 gradually decreases until the voltage of the main battery 3 becomes smaller than a set value, and stops charging.
Specifically, the first charging module 5 includes:
the drain electrode of the first MOS tube Q1 is connected to the main battery 3, the source electrode of the first MOS tube Q1 is connected to the auxiliary battery 4 through the diode D1, the grid electrode of the first MOS tube Q1 is connected to the control end of the first charging module 5, and a first parasitic diode D2 is arranged between the drain electrode and the source electrode;
the first resistor R1, the first resistor R1 is connected between the main battery 3 and the control terminal of the first charging module 5.
Specifically, the first switch module 6 includes:
the base electrode of the first triode V1 is connected to the control unit 14 through the second resistor R2, the collector electrode of the first triode V1 is connected to the control end of the first charging module 5 through the third resistor R3, and the emitter electrode of the first triode V1 is grounded; the control unit 14 controls the on and off of the first triode V1;
and one end of the fourth resistor R4 is connected between the second resistor R2 and the base electrode of the first triode V1, and the other end of the fourth resistor R4 is grounded.
Specifically, the two sets of batteries include a set of main batteries 3 and a set of sub-batteries 4;
the second charging circuit 2 includes a circuit that,
the input end of the second charging module 8 is connected with the main battery 3, and the output end of the second charging module 8 is connected with the auxiliary battery 4;
the first control module 9, the input end of the first control module 9 is connected to the control unit 14, and the output end is connected to the first control end 12 of the second charging module 8;
the second control module 10, the input terminal of the second control module 10 is connected to the control unit 14, and the output terminal is connected to the second control terminal 13 of the second charging module 8.
Specifically, the second charging module 8 includes:
the drain electrode of the second MOS tube Q2 is connected to the main battery 3, the source electrode is connected to a first node 11 through an inductor, the grid electrode is connected to a first control end 12 of the second charging module 8, a second parasitic diode D3 is arranged between the drain electrode and the source electrode, and the drain electrode is connected to the first control end 12 of the second module through a tenth resistor R10;
a backflow preventing diode D4 connected between the first node 11 and the sub-battery 4;
one end of the second control terminal 13 is connected to the first node 11 and the other end is connected to the output terminal of the second control module 10.
Specifically, the first control module 9 includes:
the base electrode of the second triode V2 is connected to the control unit 14 through a fifth resistor R5, the collector electrode of the second triode V2 is connected to the first control end 12 of the second charging module 8 through a sixth resistor R6, and the emitter electrode of the second triode V is grounded; the control unit 14 controls the on and off of the second transistor V2, and further controls the first control module 9.
Specifically, the second control module 10 includes:
the grid electrode of the third MOS tube Q3 is connected to the control unit 14 through a seventh resistor R7, the drain electrode of the third MOS tube Q3 is connected to the second control end 13 of the second charging module 8, and the source electrode of the third MOS tube Q3 is grounded through an eighth resistor R8; the control unit 14 switches the third MOS transistor Q3 on and off at a set frequency to generate a proper output voltage for charging the secondary battery 4;
and one end of the ninth resistor R9 is connected between the seventh resistor R7 and the grid electrode of the third MOS tube Q3, the other end of the ninth resistor R9 is connected between the eighth resistor R8 and the source electrode of the third MOS tube Q3, and a third parasitic diode D5 is arranged between the drain electrode and the source electrode.
Specifically, the backflow prevention diode D4 is formed by connecting two diode assemblies in parallel, and is mainly used for preventing the voltage of the secondary battery 4 from flowing backwards into the main battery 3;
the control unit 14 collects charging current, voltage and temperature of the first charging circuit 1 and the second charging circuit 2 in real time, and displays the charging current, voltage and temperature on a display.
The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included within the scope of the present utility model.
Claims (2)
1. An inter-battery charging system of a lead-acid battery is suitable for charging two groups of batteries connected in parallel; it is characterized by comprising the following steps of,
the first charging circuit is connected between the two groups of batteries;
the second charging circuit is connected between the two groups of batteries and is connected with the first charging circuit in parallel;
the control unit is respectively connected with the first charging circuit, the second charging circuit and each group of batteries;
the two groups of batteries comprise a group of main batteries and a group of auxiliary batteries;
the first charging circuit includes:
the input end of the first charging module is connected with the main battery, and the output end of the first charging module is connected with the auxiliary battery;
the input end of the first switch module is connected to the control unit, and the output end of the first switch module is connected to the control end of the first charging module;
the first charging module includes:
the drain electrode of the first MOS tube is connected to the main battery, the source electrode of the first MOS tube is connected to the auxiliary battery through a diode, the grid electrode of the first MOS tube is connected to the control end of the first charging module, and a first parasitic diode is arranged between the drain electrode and the source electrode;
the first resistor is connected between the main battery and the control end of the first charging module;
the first switch module includes:
the base electrode of the first triode is connected to the control unit through a second resistor, the collector electrode of the first triode is connected to the control end of the first charging module through a third resistor, and the emitter electrode of the first triode is grounded;
one end of the fourth resistor is connected between the second resistor and the base electrode of the first triode, and the other end of the fourth resistor is grounded;
the second charging circuit may comprise a circuit configured to charge the battery,
the input end of the second charging module is connected with the main battery, and the output end of the second charging module is connected with the auxiliary battery;
the input end of the first control module is connected to the control unit, and the output end of the first control module is connected to the first control end of the second charging module;
the input end of the second control module is connected to the control unit, and the output end of the second control module is connected to the second control end of the second charging module; the second charging module includes:
the drain electrode of the second MOS tube is connected to the main battery, the source electrode of the second MOS tube is connected to a first node through an inductor, the grid electrode of the second MOS tube is connected to the first control end of the second charging module, a second parasitic diode is arranged between the drain electrode and the source electrode, and the drain electrode of the second MOS tube is connected to the first control end of the second control module through a tenth resistor;
a backflow preventing diode connected between the first node and the sub-battery;
one end of the second control end is connected to the first node, and the other end of the second control end is connected to the output end of the second control module; the first control module includes:
the base electrode of the second triode is connected to the control unit through a fifth resistor, the collector electrode of the second triode is connected to the first control end of the second charging module through a sixth resistor, and the emitter electrode of the second triode is grounded;
the second control module includes:
the grid electrode of the third MOS tube is connected to the control unit through a seventh resistor, the drain electrode of the third MOS tube is connected to the second control end of the second charging module, and the source electrode of the third MOS tube is grounded through an eighth resistor;
and one end of the ninth resistor is connected between the seventh resistor and the grid electrode of the third MOS tube, the other end of the ninth resistor is connected between the eighth resistor and the source electrode of the third MOS tube, and a third parasitic diode is arranged between the drain electrode and the source electrode.
2. The inter-cell charging system of claim 1, wherein the anti-reverse flow diode is formed using two diode assemblies in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223580397.5U CN219659443U (en) | 2022-12-30 | 2022-12-30 | Inter-battery charging system of lead-acid battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223580397.5U CN219659443U (en) | 2022-12-30 | 2022-12-30 | Inter-battery charging system of lead-acid battery |
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| Publication Number | Publication Date |
|---|---|
| CN219659443U true CN219659443U (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223580397.5U Active CN219659443U (en) | 2022-12-30 | 2022-12-30 | Inter-battery charging system of lead-acid battery |
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| CN (1) | CN219659443U (en) |
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- 2022-12-30 CN CN202223580397.5U patent/CN219659443U/en active Active
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