CN103490491A - Lithium battery charging-discharging protecting device - Google Patents
Lithium battery charging-discharging protecting device Download PDFInfo
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- CN103490491A CN103490491A CN201310230385.6A CN201310230385A CN103490491A CN 103490491 A CN103490491 A CN 103490491A CN 201310230385 A CN201310230385 A CN 201310230385A CN 103490491 A CN103490491 A CN 103490491A
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- lithium battery
- protective device
- discharge protective
- battery charge
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Abstract
The invention relates to a lithium battery charging-discharging protecting device which has the automatic balance function. The lithium battery charging-discharging protecting device is composed of at least two lithium battery charging-discharging protecting device bodies connected in parallel. Each lithium battery charging-discharging protecting device body comprises two H bridges and a pulse transformer, each H bridge comprises four MOS tubes, the MOS tubes of the two H bridges are the same, the leading-out ends of the first H bridges are connected to the two ends of the main sides of the pulse transformers, the other ends of the first H bridges are connected to the positive electrode and the negative electrode of a lithium battery, the leading-out ends of the second H bridges are connected to the positive electrode and the negative electrode of a direct current busbar, the other ends of the second H bridges are connected to the two ends of the auxiliary sides of the pulse transformers, the lithium battery charging-discharging protecting device bodies share the positive electrode and the negative electrode of the one direct busbar, and a capacitor is connected between the two leading-out ends of the second H bridges or between the positive electrode and the negative electrode of the shared direct current busbar. The lithium battery charging-discharging protecting device has the advantages that the automatic balance function is achieved, the situation that the voltage of a lithium battery pack is kept coincident in the charging and discharging processes is guaranteed, energy flows inside the lithium battery pack without overflowing, the maximum use rate of the energy is guaranteed, and the service life of the lithium battery pack is prolonged.
Description
Technical field
The present invention relates to the lithium battery charge and discharge protective device, it is formed in parallel by the lithium battery charge and discharge protective device of a plurality of monomers, is the lithium battery charge and discharge protective device with automatic equalization function.
Background technology
Existing lithium battery charging device, in charging normal process, due to the distributivity of lithium battery parameter, puts on the voltage that the voltage of the positive and negative end of lithium battery may can bear higher than lithium battery, causes superpotential generation.For the infringement of avoiding overvoltage to bring lithium battery, prior art mostly is the method adopted at charging circuit additional bypass resistance and decomposes overvoltage.Use the principle of resistance consumption by by-pass current, to guarantee that lithium battery is unlikely to overvoltage in charging process, this measure has caused energy to be consumed without foundation and has not produced any benefit.Simultaneously, lithium battery charging device does not have corresponding equalizing circuit in discharge process, easily causes the lithium battery overvoltage.Discharge process is in uncontrollable state, can bring immeasurable impact to life-span of lithium battery.
Summary of the invention
The object of the invention is to; overcome the shortcoming of prior art; a kind of lithium battery charge and discharge protective device with automatic equalization function is provided; the voltage that guarantees the lithium battery group is consistent in the charging and discharging process; and energy flows not excessive in the lithium battery group, has guaranteed the maximum utilization of energy.Improve the useful life of lithium battery group.
Lithium battery charge and discharge protective device technique scheme of the present invention is:
A kind of lithium battery charge and discharge protective device, it is composed in parallel by least two single lithium battery charging and discharging protection devices; Described single lithium battery charging and discharging protection device comprises:
Two H bridges and a pulse transformer, each H bridge has included 4 metal-oxide-semiconductors, and the metal-oxide-semiconductor of two H bridges is identical; In these two H bridges, a H bridge exit is connected to the two ends, former limit of pulse transformer, and the other end is connected on the both positive and negative polarity of lithium battery; The 2nd H bridge exit is connected on the both positive and negative polarity of DC master row, and the other end is connected to the secondary two ends of pulse transformer;
All single lithium battery charging and discharging protection devices in described lithium battery charge and discharge protective device have the both positive and negative polarity of a DC master row; All the 2nd H bridges are drawn between the both positive and negative polarity at two ends or between the both positive and negative polarity of total DC master row and are connect an electric capacity.
Further technical scheme is:
Described lithium battery charge and discharge protective device, its metal-oxide-semiconductor is connected with a timer, for send the PWM waveform by timer, makes metal-oxide-semiconductor open and turn-off according to regular time; Described timer is a timer with timing circuit.
Described lithium battery charge and discharge protective device, in its metal-oxide-semiconductor, inverse parallel has a diode.
Described lithium battery charge and discharge protective device, its H bridge and the 2nd H bridge form a synchronous rectificating device.
Described lithium battery charge and discharge protective device, it is energy storage capacitor that its 2nd H bridge is drawn the electric capacity connect between the both positive and negative polarity of the electric capacity that connects between the both positive and negative polarity at two ends or total DC master row.
Described lithium battery charge and discharge protective device, its H bridge is drawn between the both positive and negative polarity at two ends and is connect an electric capacity.
Described lithium battery charge and discharge protective device, it is composed in parallel by the lithium battery charge and discharge protective device of 3 monomers.
Described lithium battery charge and discharge protective device, it is composed in parallel by the lithium battery charge and discharge protective device of 10 monomers.
In conjunction with technical scheme of the present invention and principle, remarkable result of the present invention is described as follows:
Lithium battery charge and discharge protective device one end of the present invention is connected with the two poles of the earth of lithium battery; an other end is connected with DC master row; DC master row is public DC master row, and it is energy storage capacitor that the 2nd H bridge is drawn the electric capacity connect between the both positive and negative polarity of the electric capacity that connects between the both positive and negative polarity at two ends or total DC master row.Lithium battery charge and discharge protective device of the present invention adopts the synchronous rectification of two H bridges, and the middle pulse transformer that adopts is isolated connection.Lithium battery charge and discharge protective device of the present invention has following advantage:
1, energy in bidirectional flow: be connected with energy storage capacitor between the both positive and negative polarity of total DC master row, when lithium battery discharges, energy storage capacitor absorbs electric energy, and when lithium cell charging, energy storage capacitor discharges electric energy.
2, fixed duty cycle, automatically equalizing voltage: described metal-oxide-semiconductor sends the PWM waveform by the timer with timing circuit makes metal-oxide-semiconductor open and turn-off according to regular time, and duty ratio is fixed.In the situation that duty ratio is fixing, lithium battery group energy automatically equalizing voltage.
3, synchronous rectification, high conversion efficiency: two synchronous rectificating devices that the H bridge forms, can realize the synchronous rectification when lithium battery group discharges and recharges, improved conversion efficiency.
The accompanying drawing explanation
Fig. 1 is the schematic diagram that the lithium battery charge and discharge protective device of a monomer is connected with DC master row and lithium battery.
Fig. 2 is that the timer by having timing circuit produces driving signal theory diagram.
Fig. 3 is the lithium battery charge and discharge protective device schematic diagram of the present invention by the lithium battery charge and discharge protective installation composition of 3 monomers.
In figure, the respective name of each mark is: 1
-dC master row; 2,2.1,2.2,2.3
-charging and discharging protection device; 3,3.1,3.2,3.3
-the BT lithium battery; 4
-timer; 5
-the H bridge; Q1～Q4-MOS pipe; T, T1, T2, T3-pulse transformer; The positive pole of BUS+-DC master row; The negative pole of BUS--DC master row; C1, C2-electric capacity; BAT+-positive pole of lithium battery; The negative pole of BAT--lithium battery.
embodiment
Below by embodiment also by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
embodiment 1:as shown in Figure 1, be the basic embodiment of a kind of lithium battery charge and discharge protective device of the present invention, as shown in Figure 1, be the schematic diagram that the lithium battery charge and discharge protective device 2 of a monomer is connected with DC master row 1 and lithium battery 3.Described lithium battery charge and discharge protective device, it is composed in parallel by least two single lithium battery charging and discharging protection devices 2; Described single lithium battery charging and discharging protection device 2 comprises: two H bridges 5 and a pulse transformer T, and each H bridge has included 4 metal-oxide-semiconductors, and the metal-oxide-semiconductor of two H bridges is identical; In these two H bridges, a H bridge exit is connected to the two ends, former limit of pulse transformer T, and the other end is connected on the both positive and negative polarity of lithium battery 3; The 2nd H bridge exit is connected on the both positive and negative polarity of DC master row 1, and the other end is connected to the secondary two ends of pulse transformer T; All single lithium battery charging and discharging protection devices 2 in described lithium battery charge and discharge protective device have the both positive and negative polarity of a DC master row 1; All the 2nd H bridges are drawn between the both positive and negative polarity at two ends or between the both positive and negative polarity of total DC master row and are connect a capacitor C 2.
embodiment 2:further embodiment.As different from Example 1, as shown in Figure 2, described lithium battery charge and discharge protective device, its metal-oxide-semiconductor is connected with a timer 4, for by timer 4, sending the PWM waveform, makes metal-oxide-semiconductor open and turn-off according to regular time; Described timer is a timer with timing circuit.
embodiment 3:further embodiment.As different from Example 1, as shown in Figure 1, described lithium battery charge and discharge protective device, in described metal-oxide-semiconductor, inverse parallel has a diode.
embodiment 4:further embodiment.As different from Example 1, as shown in Figure 1, described lithium battery charge and discharge protective device, its H bridge and the 2nd H bridge form a synchronous rectificating device.
embodiment 5:further embodiment.As different from Example 1, as shown in Figure 1,3, described lithium battery charge and discharge protective device, its 2nd H bridge is drawn between the both positive and negative polarity at two ends and is connect capacitor C 2, is energy storage capacitor.
embodiment 6:further embodiment.As different from Example 5, the indirectly capacitor C 2 of the both positive and negative polarity of total DC master row, be energy storage capacitor, and the 2nd H bridge of each single lithium battery charging and discharging protection device of the present embodiment is drawn between the both positive and negative polarity at two ends and no longer connect capacitor C 2.
embodiment 7:further embodiment.As different from Example 1, as shown in Figure 1, described lithium battery charge and discharge protective device, its H bridge is drawn between the both positive and negative polarity at two ends and is connect a capacitor C 1.
embodiment 8:as different from Example 1, as shown in Figure 3, the present embodiment is the embodiment of the lithium battery charge and discharge protective device that composes in parallel of the lithium battery charge and discharge protective device 2.1,2.2,2.3 by 3 monomers.Lithium battery is respectively 3.1,3.2,3.3; Pulse transformer T is respectively T1, T2, T3; The lithium battery charge and discharge protective device 2.1,2.2,2.3 of 3 monomers has 6 H bridges, and its metal-oxide-semiconductor is identical.
embodiment 9:as different from Example 8, the present embodiment is the lithium battery charge and discharge protective device that the lithium battery charge and discharge protective device by 10 monomers composes in parallel.
Can also there is the lithium battery charge and discharge protective device of more monomers to compose in parallel the lithium battery charge and discharge protective device.
To technical scheme of the present invention and principle and effect, be described further as follows:
As shown in the figure; lithium battery charge and discharge protective device of the present invention produces the pulse signal of a fixed duty cycle by the timer 4 with timing circuit; this signal generates, inputs to the driving chip after drive amplification by anti-phase, dead band, thus the H bridge metal-oxide-semiconductor of the former limit of driving transformer T, secondary.If the voltage of lithium battery group exists uneven, the energy of voltage higher li battery will be transferred to DC master row 1 from the lithium battery charge and discharge protective device, and the low lithium battery of voltage will obtain energy from DC master row 1, thereby reach the purpose of electric voltage equalization.
Claim protection range of the present invention is not limited to above-described embodiment.
Claims (8)
1. a lithium battery charge and discharge protective device, is characterized in that, it is composed in parallel by least two single lithium battery charging and discharging protection devices; Described single lithium battery charging and discharging protection device comprises:
Two H bridges and a pulse transformer, each H bridge has included 4 metal-oxide-semiconductors, and the metal-oxide-semiconductor of two H bridges is identical; In these two H bridges, a H bridge exit is connected to the two ends, former limit of pulse transformer, and the other end is connected on the both positive and negative polarity of lithium battery; The 2nd H bridge exit is connected on the both positive and negative polarity of DC master row, and the other end is connected to the secondary two ends of pulse transformer;
All single lithium battery charging and discharging protection devices in described lithium battery charge and discharge protective device have the both positive and negative polarity of a DC master row; All the 2nd H bridges are drawn between the both positive and negative polarity at two ends or between the both positive and negative polarity of total DC master row and are connect an electric capacity.
2. lithium battery charge and discharge protective device according to claim 1, is characterized in that, described metal-oxide-semiconductor is connected with a timer, for send the PWM waveform by timer, makes metal-oxide-semiconductor open and turn-off according to regular time; Described timer is a timer with timing circuit.
3. lithium battery charge and discharge protective device according to claim 1, is characterized in that, in described metal-oxide-semiconductor, inverse parallel has a diode.
4. lithium battery charge and discharge protective device according to claim 1, is characterized in that, a described H bridge and the 2nd H bridge form a synchronous rectificating device.
5. lithium battery charge and discharge protective device according to claim 1, is characterized in that, it is energy storage capacitor that described the 2nd H bridge is drawn the electric capacity connect between the both positive and negative polarity of the electric capacity that connects between the both positive and negative polarity at two ends or total DC master row.
6. lithium battery charge and discharge protective device according to claim 1, is characterized in that, a described H bridge is drawn between the both positive and negative polarity at two ends and connect an electric capacity.
7. lithium battery charge and discharge protective device according to claim 1, is characterized in that, it is composed in parallel by the lithium battery charge and discharge protective device of 3 monomers.
8. lithium battery charge and discharge protective device according to claim 1, is characterized in that, it is composed in parallel by the lithium battery charge and discharge protective device of 10 monomers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310230385.6A CN103490491A (en) | 2013-06-12 | 2013-06-12 | Lithium battery charging-discharging protecting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310230385.6A CN103490491A (en) | 2013-06-12 | 2013-06-12 | Lithium battery charging-discharging protecting device |
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| CN103490491A true CN103490491A (en) | 2014-01-01 |
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| CN201310230385.6A Pending CN103490491A (en) | 2013-06-12 | 2013-06-12 | Lithium battery charging-discharging protecting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811497A (en) * | 2016-03-14 | 2016-07-27 | 上海电气集团股份有限公司 | Integrated DC-DC battery balancer |
| CN107508334A (en) * | 2017-08-03 | 2017-12-22 | 北京优尔良科技发展有限公司 | A kind of batteries online management system |
| CN107591579A (en) * | 2016-07-08 | 2018-01-16 | 王研 | A kind of novel power battery group protection board |
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| CN102025182A (en) * | 2010-11-30 | 2011-04-20 | 梁一桥 | Modular charging/discharging system of power battery pack of multifunctional electromobile |
| CN102222957A (en) * | 2011-06-21 | 2011-10-19 | 清华大学深圳研究生院 | Automatic battery capacity equalization circuit and implementing method thereof |
| CN102340165A (en) * | 2010-07-26 | 2012-02-01 | 李建国 | Electrodynamic force vehicle power supply management system |
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2013
- 2013-06-12 CN CN201310230385.6A patent/CN103490491A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567574A (en) * | 2009-06-03 | 2009-10-28 | 王创社 | Proportional balancing method for voltage of energy storage device and circuit |
| CN102340165A (en) * | 2010-07-26 | 2012-02-01 | 李建国 | Electrodynamic force vehicle power supply management system |
| CN102025182A (en) * | 2010-11-30 | 2011-04-20 | 梁一桥 | Modular charging/discharging system of power battery pack of multifunctional electromobile |
| CN102222957A (en) * | 2011-06-21 | 2011-10-19 | 清华大学深圳研究生院 | Automatic battery capacity equalization circuit and implementing method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811497A (en) * | 2016-03-14 | 2016-07-27 | 上海电气集团股份有限公司 | Integrated DC-DC battery balancer |
| CN107591579A (en) * | 2016-07-08 | 2018-01-16 | 王研 | A kind of novel power battery group protection board |
| CN107508334A (en) * | 2017-08-03 | 2017-12-22 | 北京优尔良科技发展有限公司 | A kind of batteries online management system |
| CN107508334B (en) * | 2017-08-03 | 2024-05-14 | 北京优尔良科技发展有限公司 | Online management system of storage battery pack |
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Application publication date: 20140101 |