CN203967801U - The large current balance charger of lithium battery - Google Patents
The large current balance charger of lithium battery Download PDFInfo
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- CN203967801U CN203967801U CN201420407796.8U CN201420407796U CN203967801U CN 203967801 U CN203967801 U CN 203967801U CN 201420407796 U CN201420407796 U CN 201420407796U CN 203967801 U CN203967801 U CN 203967801U
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- chip microcomputer
- lithium battery
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Abstract
The utility model discloses the large current balance charger of a kind of lithium battery, it comprises 1 mainboard and n piece slave plate, carry out exchanges data by CAN communication bus between the two, mainboard comprises single-chip microcomputer, 422 communication interfaces, CAN communication interface, temperature acquisition and control circuit; Slave plate comprises single-chip microcomputer, temperature sampling circuit, current sampling circuit, voltage sampling circuit, DC-DC power module, CAN communication interface.The utility model has the advantages that: 1. can carry out active equalization charging to the power brick of the lithium battery composition of any amount, equalizing charge electric current can be up to 50A.2. can carry out the charging of 2 stages to the lithium battery of any type.Band data communication interface, in exportable charging process various data.
Description
Technical field
The utility model relates to the large current balance charger of a kind of lithium battery.
Background technology
Along with the extensive use of lithium battery
,the requirement that the series connection of many group lithium batteries is used is more and more higher, due to the difference of battery material and manufacturing process etc., the characteristic of all single lithium batteries can not be in full accord, the voltage of monomer in long-term use, capacity level there will be difference, if difference is eliminated not in time, after accumulating over a long period, can progressively strengthen, the form showing in discharge process is that whole cell set capacity reduces, there is to one's heart's content condition in single battery, very easily cause battery to damage, and the form showing in charging process is that each monomer voltage is inconsistent, there will be single overpressure situation, there is certain potential safety hazard.So, for make lithium battery group in long-term use all the time in more excellent state, lithium cell charging machine must possess the function of cell capacity equilibrium, reduces the voltage differences between each cell.Traditional equalizing circuit is to adopt passive equilibrium, adopt serial connection charge, monomer equalization discharge, advantage is that charging control circuit is simple, needs the power supply of use few, shortcoming is to design discharge circuit, and the degree of unbalance of monomer will determine the selection of discharging current, if monomer degree of unbalance is larger, and discharging current is little, discharge time is oversize, if increasing discharging current, will increase again caloric value, reduce the reliability of system; In addition, equalization discharge need to discharge monomer high voltage, and this will waste mass energy.
Utility model content
The purpose of this utility model is the deficiency that overcomes above-mentioned technology existence, provides that a kind of euqalizing current is large, charge efficiency is high, reliability is high, the lithium battery balance charger of flexible configuration.
The technical scheme that the utility model adopted is to achieve these goals as follows: the large current balance charger of a kind of lithium battery, is characterized in that: comprise 1 mainboard and n piece slave plate, between carry out exchanges data by CAN communication bus;
Mainboard comprises single-chip microcomputer, 422 communication interfaces, CAN communication interface, temperature controller, LDO voltage stabilizing circuit; 422 communication interfaces, CAN communication interface, temperature controller, LDO voltage stabilizing circuit are connected with single-chip microcomputer;
Slave plate comprises single-chip microcomputer, temperature sensor, current sensor, LDO voltage stabilizing circuit, DC-DC power module and CAN communication interface; Temperature sensor, current sensor, LDO voltage stabilizing circuit, DC-DC power module and CAN communication interface are connected with single-chip microcomputer; DC-DC power module connects with corresponding battery; Battery is connected with single-chip microcomputer.
According to the large current balance charger of lithium battery described in the utility model, it is characterized in that: the single-chip microcomputer in single-chip microcomputer and slave plate in described mainboard is LPC1754 chip microcontroller.
The large current balance charger of lithium battery described in the utility model, slave plate charging circuit adopts independently DC-DC power module of every road.Internal communication is CAN communication.External communication interface is RS422 interface.Described single-chip microcomputer can be LPC1754 single-chip microcomputer.Charging is controlled and is adopted active equalization control, and euqalizing current is decided by selected DC-DC power module output current.
The utility model has the advantages that: 1, can carry out active equalization charging to the power brick of the lithium battery composition of any amount, equalizing charge electric current can be up to 50A.2, can carry out the charging of 2 stages to the lithium battery of any type.3, band data communication interface, all various data in exportable charging process.
Brief description of the drawings
Fig. 1 is the utility model schematic block circuit diagram.
Embodiment
Below in conjunction with accompanying drawing 1, the utility model is elaborated, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1: provide at this that a kind of euqalizing current is large, charge efficiency is high, reliability is high, the lithium battery balance charger of flexible configuration; It comprises 1 mainboard 10 and n piece slave plate 20, carries out exchanges data between the two by CAN communication bus; Described mainboard 10 comprises single-chip microcomputer 11,422 communication interfaces 12, CAN communication interface 13, temperature acquisition and control circuit 14; Described slave plate 20 comprises single-chip microcomputer 21, temperature sampling circuit 22, current sampling circuit 23, voltage sampling circuit 24, charging circuit (DC-DC power module) 25, CAN communication interface 26.
Mainboard 10 comprises single-chip microcomputer 11,422 communication interfaces 12, CAN communication interface 13, temperature controller 14, LDO voltage stabilizing circuit 15; 422 communication interfaces 12, CAN communication interface 13, temperature controller 14, LDO voltage stabilizing circuit 15 are connected with single-chip microcomputer 11.
Slave plate 20 comprises single-chip microcomputer 21, temperature sensor 22, current sensor 23, LDO voltage stabilizing circuit 24, DC-DC power module 25, CAN communication interface 26; Temperature sensor 22, current sensor 23, LDO voltage stabilizing circuit 24, DC-DC power module 25 and CAN communication interface 26 are connected with single-chip microcomputer 21; DC-DC power module 25 connects with corresponding battery 27; Battery 27 is connected with single-chip microcomputer 21.In Fig. 1, battery 27 is directly connected to single-chip microcomputer 21, and that is exactly voltage sample.
LDO is low dropout regulator, means low pressure difference linear voltage regulator, is with respect to traditional linear voltage regulator.Traditional linear voltage regulator, wants more than specific output voltage exceeds 2v ~ 3V as the chip of 78xx series all requires input voltage, otherwise with regard to cisco unity malfunction.But in some cases, such condition is obviously too harsh, and as 5v turns 3.3v, input only has 1.7v with the pressure reduction of output, does not obviously satisfy condition.For this situation, just there is the power conversion chip of LDO class.This voltage also will gather, so deliver to single-chip microcomputer.
wherein single-chip microcomputer adopts LPC1754, and inside has high accurate A/D, DA and CAN communication interface, coordinates analog signal processing to realize battery temperature, charging current, the isoparametric collection of cell voltage, and DA output is used for controlling charging current or charging voltage.
dC-DC power module is selected the adjustable output electric power module of VICOR company, control the output voltage of power module by DA, thereby realize constant current or constant voltage charge, after some monomers have charged, automatically stop, other monomer continues charging, and until all monomers have charged, whole power brick charging finishes.
external communication interface adopts RS422, can be by computer the parameter such as the monomer voltage to all cells, charging current, charged state, fault message, battery capacity show.
?every slave plate can be arranged on by battery nearby, and all slave plates work alone completely.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiment, General Principle as defined herein can, in the situation that not departing from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (2)
1. the large current balance charger of lithium battery, is characterized in that: comprise 1 mainboard (10) and n piece slave plate (20), between carry out exchanges data by CAN communication bus;
Mainboard (10) comprises single-chip microcomputer (11), 422 communication interfaces (12), CAN communication interface (13), temperature controller (14), LDO voltage stabilizing circuit (15); 422 communication interfaces (12), CAN communication interface (13), temperature controller (14), LDO voltage stabilizing circuit (15) are connected with single-chip microcomputer (11);
Slave plate (20) comprises single-chip microcomputer (21), temperature sensor (22), current sensor (23), LDO voltage stabilizing circuit (24), DC-DC power module (25), CAN communication interface (26); Temperature sensor (22), current sensor (23), LDO voltage stabilizing circuit (24), DC-DC power module (25) and CAN communication interface (26) are connected with single-chip microcomputer (21); DC-DC power module (25) connects with corresponding battery (27); Battery (27) is connected with single-chip microcomputer (21).
2. the large current balance charger of lithium battery according to claim 1, is characterized in that the single-chip microcomputer (21) in single-chip microcomputer (11), the slave plate (20) in described mainboard (10) is LPC1754 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420407796.8U CN203967801U (en) | 2014-07-23 | 2014-07-23 | The large current balance charger of lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420407796.8U CN203967801U (en) | 2014-07-23 | 2014-07-23 | The large current balance charger of lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203967801U true CN203967801U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420407796.8U Active CN203967801U (en) | 2014-07-23 | 2014-07-23 | The large current balance charger of lithium battery |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720646A (en) * | 2016-04-11 | 2016-06-29 | 深圳市清友能源技术有限公司 | Charging current-limiting circuit for communication base station reserve power supply |
| CN108988410A (en) * | 2018-06-06 | 2018-12-11 | 安徽锐能科技有限公司 | Equal balance system for battery pack |
| CN114374004A (en) * | 2021-12-23 | 2022-04-19 | 北京时代民芯科技有限公司 | Battery management system capable of setting number of charging units |
-
2014
- 2014-07-23 CN CN201420407796.8U patent/CN203967801U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720646A (en) * | 2016-04-11 | 2016-06-29 | 深圳市清友能源技术有限公司 | Charging current-limiting circuit for communication base station reserve power supply |
| CN105720646B (en) * | 2016-04-11 | 2018-03-02 | 深圳市清友能源技术有限公司 | A kind of charging current limiter circuit for stand-by power supply after communication base station |
| CN108988410A (en) * | 2018-06-06 | 2018-12-11 | 安徽锐能科技有限公司 | Equal balance system for battery pack |
| CN114374004A (en) * | 2021-12-23 | 2022-04-19 | 北京时代民芯科技有限公司 | Battery management system capable of setting number of charging units |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |