CN202333857U - Active equalizer of lithium battery pack - Google Patents
Active equalizer of lithium battery pack Download PDFInfo
- Publication number
- CN202333857U CN202333857U CN2011204430617U CN201120443061U CN202333857U CN 202333857 U CN202333857 U CN 202333857U CN 2011204430617 U CN2011204430617 U CN 2011204430617U CN 201120443061 U CN201120443061 U CN 201120443061U CN 202333857 U CN202333857 U CN 202333857U
- Authority
- CN
- China
- Prior art keywords
- lithium battery
- equalizer
- direct current
- converters
- equalization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses an active equalizer of a lithium battery pack, which comprises a plurality of direct current (DC)-direct current (DC) converters, two direct current equalization buses and n switch channel modules, wherein two input ends of each of the DC-DC converters are respectively connected with the anode and cathode of the lithium battery pack; a control terminal of each of the DC-DC converters is used for receiving control signals; two output ends of each of the DC-DC converters are connected to the two direct current equalization buses respectively; two input ends of each of the switch channel modules are respectively connected to the two direct current equalization buses; a control terminal of each of the switch channel modules is used for receiving switching signals; and two output ends of each of the switch channel modules are respectively connected with the anode and cathode of the corresponding lithium battery in the lithium battery pack. The equalizer is an active equalizer, and has the advantages of high equalization speed and high efficiency; by adoption of the equalization buses, the number of DC-DC converters and the cost of equalizer are reduced under the condition of guaranteeing the satisfactory performance; and moreover, a relay is used as an equalization isolator so as to reduce the whole cost of the equalizer and guarantee high reliability.
Description
Technical field
The utility model belongs to storage battery balancing technique field, is specifically related to a kind of active equalizer of lithium battery group.
Background technology
The low tension battery field has application market widely, and for example electric bicycle, communication base station, automobile accessory power supply, scenic spot are with electric motor car or the like.Traditional low tension battery comprises lead-acid battery and lithium battery, and lead-acid battery is low with its price, stable performance, and advantage such as connection in series-parallel is simple is always in occupation of most market; And lithium battery is higher because of its price, and connection in series-parallel needs proprietary problems such as battery management system be applied in single battery unit module field and jumbo electrokinetic cell fields such as mobile phone always, like electric automobile etc.
But in recent years, the cost of lithium battery itself constantly descends, and it is big to have capacity again with respect to lead-acid battery; Advantages such as the life-span is long; Progressively be applied in A-battery group field, lead-acid battery is owing to its pollution problem especially in the recent period, and its application receives more restriction; Cost also rising, will be accelerated the application of lithium battery group in low-pressure field.
The series connection of lithium battery group is used must have battery management system, and critical piece wherein is a balanced unit, and this unit is used for the unbalanced battery unit that charges is carried out equalized maintenance, to improve the efficient and the life-span of whole battery group.Existing equalizer is divided into passive type and active two kinds, and passive equalizer adopts the mode of parallel resistance more, and the advantage of this equalizer is simple in structure, and price is low, and shortcoming is that speed is slow, and efficient is low, is accompanied by energy loss; And active equalizer adopts the pattern of parallel connection direct-DC converter more, and advantage is that balancing speed is fast, and efficient is high, and energy utilization rate is high, but owing to need a plurality of DC-DC converters, makes cost higher.Therefore, in the low pressure applications field (＜60VDC), it is lower to be badly in need of a kind of cost, the equalizer of function admirable, the application of lithium battery in low-pressure field of just making greater efforts to promote.
Summary of the invention
To the above-mentioned technological deficiency of existing in prior technology, the utility model provides a kind of active equalizer of lithium battery group, has reduced corresponding devices, has reduced the cost of equalizer.
A kind of active equalizer of lithium battery group comprises: several DC-DC (DC-to-dc) converter, two balanced buses of direct current and n switch channel module, and n is the number of lithium battery in the lithium battery group; Wherein:
Two inputs of described DC-DC converter are corresponding respectively to link to each other with the both positive and negative polarity of lithium battery group, and control end receives the control signal that external equipment provides, and two outputs correspondence respectively are connected on described two direct currents equilibrium bus;
Two inputs of described switch channel module correspondence respectively are connected on the balanced bus of described two direct currents, and control end receives the switching signal that external equipment provides, two outputs respectively with the lithium battery group in the both positive and negative polarity of corresponding lithium battery link to each other.
In the optimized technical scheme, described switch channel module is a relay; Relay is more cheap, can reduce the whole cost of equalizer.
The equalizer of the utility model adopts active equilibrium, and balancing speed is fast, and efficient is high; Satisfying under the condition of performance, adopting bus balanced, significantly reducing the number of DC-DC converter, reducing the cost of equalizer; Select for use relay as balanced isolating device simultaneously, can make the whole cost of equalizer obtain descending, and reliability is high.
Description of drawings
Fig. 1 is the circuit theory sketch map of the utility model.
Embodiment
In order to describe the utility model more particularly, be elaborated below in conjunction with accompanying drawing and embodiment technical scheme and relative theory thereof to the utility model.
As shown in Figure 1, a kind of active equalizer of lithium battery group comprises: a DC-DC converter, two balanced buses of direct current and ten relays; Wherein:
The lithium battery group is composed in series by ten lithium batteries successively; The first input end of DC-DC converter links to each other with the positive pole of the first lithium battery E1; Second input links to each other with the negative pole of the tenth lithium battery E10; Control end receives the control signal that battery management unit provides, and first output is connected on the balanced bus L1 of first direct current, and second output is connected on the balanced bus L2 of second direct current.
The connected mode of ten relays is all the same; With the 3rd relay J 3 is example: an end of its first normally opened contact is connected on the balanced bus L1 of first direct current; The other end of first normally opened contact links to each other with the positive pole of the 3rd lithium battery E3, and an end of second normally opened contact is connected on the balanced bus L2 of second direct current, and the other end of second normally opened contact links to each other with the negative pole of the 3rd lithium battery E3; One termination of coil is received the switching signal that relay control unit provides, the other end ground connection of coil.
The main effect of DC-DC converter is to drop to the voltage of lithium battery group the voltage levvl of each lithium battery, and is transported on the balanced bus of direct current; In the present embodiment, the voltage-dropping type model of DC-DC converter using National Semiconductor is the chip of LM5005.
Battery management unit is used to detect the state of each lithium battery, and the work of control lithium battery group is also commanded the work of relay control unit simultaneously, and then controlled the action of each relay (balanced unit); In the present embodiment, it is the chip of ATA6870 that battery management unit adopts the model of Atmel company.
When equalizer was worked, according to the order of battery management unit, equalizer worked under constant voltage and current limiting state or the crossing current pressure limiting state; The balanced bus of direct current is connecting the output of DC-DC converter; Be connected to 10 relays on its each node respectively; The relay input is connected on the balanced bus of two direct currents; Output is connected in the both positive and negative polarity of lithium battery, and any time has only relay to connect, and can make corresponding lithium cell charging; Relay control unit receives the signal of battery management unit, and through coding output, control needs the corresponding relay folding of a balanced lithium battery, to realize the The whole control logic.
Claims (2)
1. the active equalizer of a lithium battery group is characterized in that, comprising: several DC-DC converters, two balanced buses of direct current and n switch channel module, and n is the number of lithium battery in the lithium battery group; Wherein:
Two inputs of described DC-DC converter are corresponding respectively to link to each other with the both positive and negative polarity of lithium battery group, and control end receives control signal, and two outputs correspondence respectively are connected on described two direct currents equilibrium bus;
Two inputs of described switch channel module correspondence respectively are connected on the balanced bus of described two direct currents, control end receiving key signal, two outputs respectively with the lithium battery group in the both positive and negative polarity of corresponding lithium battery link to each other.
2. the active equalizer of lithium battery group according to claim 1 is characterized in that: described switch channel module is a relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204430617U CN202333857U (en) | 2011-11-10 | 2011-11-10 | Active equalizer of lithium battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204430617U CN202333857U (en) | 2011-11-10 | 2011-11-10 | Active equalizer of lithium battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202333857U true CN202333857U (en) | 2012-07-11 |
Family
ID=46445823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204430617U Expired - Fee Related CN202333857U (en) | 2011-11-10 | 2011-11-10 | Active equalizer of lithium battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202333857U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111572405A (en) * | 2020-05-22 | 2020-08-25 | 安徽安凯汽车股份有限公司 | Active equalization system and method for lithium battery |
-
2011
- 2011-11-10 CN CN2011204430617U patent/CN202333857U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111572405A (en) * | 2020-05-22 | 2020-08-25 | 安徽安凯汽车股份有限公司 | Active equalization system and method for lithium battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101632694B1 (en) | Battery cell voltage balancing apparatus and method | |
| CN104184183A (en) | Battery management system and method for driving same | |
| CN201985554U (en) | Active self-management charging device for lithium ion power battery | |
| CN103023106B (en) | One-machine-and-multiple-charging electrombile charging system and method | |
| CN101740827A (en) | Active equalization system of lithium-ion power battery and equalization method thereof | |
| CN203119557U (en) | Battery pack active balancing device based on cascading structure | |
| CN103117577A (en) | Energy balance circuit for battery pack of electric vehicle | |
| CN104786866A (en) | Electric car and bi-directional inversion type motor controller | |
| CN202564995U (en) | Multichannel battery pack charge-discharge control device | |
| CN203104011U (en) | Charge/discharge managing and equalizing system for storage battery or capacitor | |
| CN104767216A (en) | Electric energy flow direction switching system and method for electric automobile intelligent charging system | |
| CN101599657A (en) | The PWM shunting realizes the method for dynamic voltage balancing of battery pack in charging state | |
| CN103023105B (en) | Electric motor car charging system with standby switching and charging method | |
| CN105472786A (en) | Distributed base station and communication system | |
| CN204674396U (en) | Electronlmobil and two-way contravariant electric machine controller | |
| CN104442437A (en) | Electric vehicle optimized energy system with balance function | |
| CN202353275U (en) | Power battery equalization circuit combining charging and discharging | |
| CN103124094A (en) | Active equalizing device of electric automobile power battery pack | |
| CN203589787U (en) | Equalization circuit for lithium battery pack | |
| CN202333857U (en) | Active equalizer of lithium battery pack | |
| CN113595221A (en) | Composite power supply module and composite power supply equalization system | |
| CN202309118U (en) | Transformer scan chain type storage battery equalizing circuit | |
| CN203933086U (en) | A kind of battery balanced device | |
| CN111697681B (en) | Multi-path charging shunt control system and method for spacecraft | |
| CN203151127U (en) | One-machine-and-multiple-charging electrombile charging system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20120711 Termination date: 20141110 |
|
| EXPY | Termination of patent right or utility model |