CN203607902U - Battery pack equalization circuit - Google Patents
Battery pack equalization circuit Download PDFInfo
- Publication number
- CN203607902U CN203607902U CN201320846020.1U CN201320846020U CN203607902U CN 203607902 U CN203607902 U CN 203607902U CN 201320846020 U CN201320846020 U CN 201320846020U CN 203607902 U CN203607902 U CN 203607902U
- Authority
- CN
- China
- Prior art keywords
- battery pack
- transformer
- circuit
- equalization
- cell
- 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 - Lifetime
Links
- 230000002457 bidirectional effect Effects 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a battery pack equalization circuit. The circuit comprises a battery pack, a DC/DC converter connected with the battery pack, electric equipment connected with a power supply output interface of the DC/DC converter and an equalization control circuit. The equalization control circuit comprises a transformer forming one-to-one correspondence with each single battery. A primary coil of the transformer is connected with the single batteries. A secondary coil is connected to the power supply output interface of the DC/DC converter. A control switch circuit which is connected with the transformer and is used for controlling on and off of the transformer is arranged. By using the circuit of the utility model, battery pack equalization efficiency is increased and an equalization system is simplified; lossless discharge equalization and charging equalization are combined together; one transformer is used to realize bidirectional equalization; simultaneously the external DC/DC is combined so that a high-efficiency and simple battery pack equalization system is realized.
Description
Technical field
This real utility model relates to a kind of circuit of battery pack balancing.
Background technology
In series battery, although identical by the electric current of cell, due to its capacity difference; the depth of discharge of battery also can be different; federation capacious is shallow fills shallow putting, and the little federation's super-charge super-discharge of capacity, this just causes, and decay capacious is slow, life; The decay that capacity is little is accelerated, the lost of life, and difference between the two can be increasing.Be to depend on that minimum joint cell by the capacity of whole group the useful life of battery pack.Therefore, in the use procedure of battery pack, must carry out equilibrium.The equalization methods adopting at present has two kinds of energy consumption formula equalization discharge and DC/DC formula charge balancings.It is very large that energy consumption formula euqalizing current can not do, and its caloric value greatly, not energy-conservation yet; The situation that while monomer voltage is too low is also not suitable for the equilibrium of Energy in use formula.DC/DC charge equalization method (as batteries of electric automobile group, often has hundreds of joint) in the many application scenarios of battery number, and efficiency is not high, circuit is complicated, the too high situation of monomer voltage is not suitable for using simultaneously.
Utility model content
In order to address the above problem, the utility model provides a kind of design of circuit of battery pack balancing.
A kind of circuit of battery pack balancing, comprises battery pack, the DC/DC transducer being connected with battery pack, and the power consumption equipment being connected with the power supply output interface of DC/DC transducer, be provided be connected with cell for balancing control circuit; Described balancing control circuit is connected with battery management system.
Concrete, described balancing control circuit comprises and each cell transformer one to one, and the primary coil of transformer is connected with cell, and secondary coil is connected to the power supply output interface of DC/DC transducer; And be provided with the control switch circuit for control transformer break-make being connected with transformer.
Concrete, described control switch comprises the first control switch circuit and the second control switch circuit; Described the first control switch circuit is serially connected with between the elementary line and cell of transformer, comprises the first switch and the first diode that are connected in parallel; Described the second control switch circuit is serially connected with between the secondary wire and cell of transformer, comprises the second switch and the second diode that are connected in parallel; Described the first diode is connected with transformer with the negative pole of the second diode.
In sum, the utlity model has following beneficial effect: (1) has improved battery pack balancing efficiency, has simplified equalizing system; (2) will can't harm equalization discharge and charge balancing combines, realize bidirectional equalization by a transformer, with being combined with of outside DC/DC, realize efficient, simple battery pack balancing system simultaneously.
Accompanying drawing explanation
Fig. 1 is the embodiment schematic diagram of a kind of circuit of battery pack balancing described in the utility model.
Embodiment
In order to allow those skilled in the art understand better the technical solution of the utility model, below the utility model is further elaborated.
As shown in Figure 1, the utility model has disclosed a kind of circuit of battery pack balancing, comprises battery pack, the DC/DC transducer being connected with battery pack, and the power consumption equipment being connected with the power supply output interface of DC/DC transducer, be provided be connected with cell for balancing control circuit; Described balancing control circuit is connected with battery management system.
Battery pack is (as electric automobile) in actual applications, all can pass through a DC/DC transducer, DC high voltage be converted to 12 or 24V voltage to low voltage equipment use (as the balanced control and management circuit in battery management system).
Take a cell as example: in the time that monomer voltage is too high, can be by the first K switch 1 of battery management system control the first ON-OFF control circuit with certain frequency switching closure, the second switch K2 of second switch control circuit disconnects, thereby to this cell electric discharge, the electric weight of electric discharge is conducted to low-pressure side 12/24V and is held by transformer, part electric weight is provided can to low-pressure side power consumption equipment, realizes harmless equalization discharge.
In the time that monomer voltage is too low, can be by the second switch K2 of battery management system control second switch control circuit with certain frequency switching closure, the first K switch 1 of the first ON-OFF control circuit disconnects, and charges to cell by the 12V/24V power supply of low-pressure side, realizes charge balancing.Because battery pack is taken from the power supply of DC/DC transducer, therefore the utility model can be realized the energy of getting battery pack itself and charges to cell, thereby realize battery pack, the cell of low electric weight is realized to charge balancing.Realize the harmless equalization discharge of certain cell and charge balancing, finally realize the equilibrium of whole battery pack.
The utility model is not described part in detail and is all adopted known technology.
The present embodiment is more excellent execution mode of the present utility model, and the part not being described in detail all adopts known mature technology.It should be noted that; in the situation that not deviating from the utility model spirit and essence thereof; those of ordinary skill in the art are when making various corresponding changes and distortion according to the utility model, but these changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (3)
1. a circuit of battery pack balancing, comprises battery pack, and the DC/DC transducer being connected with battery pack, and the power consumption equipment being connected with the power supply output interface of DC/DC transducer, is characterized in that, be provided be connected with cell for balancing control circuit; Described balancing control circuit is connected with battery management system.
2. a kind of circuit of battery pack balancing according to claim 1, it is characterized in that, described balancing control circuit comprises and each cell transformer one to one, and the primary coil of transformer is connected with cell, and secondary coil is connected to the power supply output interface of DC/DC transducer; And be provided with the control switch circuit for control transformer break-make being connected with transformer.
3. a kind of circuit of battery pack balancing according to claim 2, is characterized in that, described control switch comprises the first control switch circuit and the second control switch circuit;
Described the first control switch circuit is serially connected with between the elementary line and cell of transformer, comprises the first switch and the first diode that are connected in parallel;
Described the second control switch circuit is serially connected with between the secondary wire and cell of transformer, comprises the second switch and the second diode that are connected in parallel;
Described the first diode is connected with transformer with the negative pole of the second diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320846020.1U CN203607902U (en) | 2013-12-20 | 2013-12-20 | Battery pack equalization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320846020.1U CN203607902U (en) | 2013-12-20 | 2013-12-20 | Battery pack equalization circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203607902U true CN203607902U (en) | 2014-05-21 |
Family
ID=50720562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320846020.1U Expired - Lifetime CN203607902U (en) | 2013-12-20 | 2013-12-20 | Battery pack equalization circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203607902U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947282A (en) * | 2017-12-14 | 2018-04-20 | 成都隆航科技有限公司 | A kind of charging circuit for battery equalization system |
| CN108011525A (en) * | 2017-12-14 | 2018-05-08 | 成都隆航科技有限公司 | DC-DC control circuits in battery equalization system |
-
2013
- 2013-12-20 CN CN201320846020.1U patent/CN203607902U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947282A (en) * | 2017-12-14 | 2018-04-20 | 成都隆航科技有限公司 | A kind of charging circuit for battery equalization system |
| CN108011525A (en) * | 2017-12-14 | 2018-05-08 | 成都隆航科技有限公司 | DC-DC control circuits in battery equalization system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103956799B (en) | A kind of circuit of battery pack balancing based on many secondary transformer and its implementation | |
| CN204334058U (en) | A kind of balancer of serial lithium battery group | |
| CN104578288A (en) | Double-level-bridge-arm series connection storage cell pack efficient equalizer topology circuit and control method thereof | |
| CN104767216A (en) | Electric energy flow direction switching system and method for electric automobile intelligent charging system | |
| CN203607902U (en) | Battery pack equalization circuit | |
| CN204271706U (en) | A kind of battery module voltages balancer based on AC bus | |
| CN203589787U (en) | Equalization circuit for lithium battery pack | |
| CN104935033A (en) | Storage battery formation processing and charging/discharging circuit and control method thereof | |
| CN204615463U (en) | A kind of electrokinetic cell active equalization charging device | |
| CN201752078U (en) | Charging tube management system of energy transfer way of multi lithium ion battery set | |
| CN203827031U (en) | Battery group equalization circuit based on multi-secondary transformer | |
| CN204376462U (en) | The efficient equalizer topological circuit of a kind of double-deck brachium pontis series-connected batteries | |
| CN103516002A (en) | Method and equipment for fast and equalizing charging of lithium ion battery pack | |
| CN102270871B (en) | Pneumatic-control charging-type electric quantity equalizing system for power battery pack | |
| CN205453179U (en) | Electric vehicle battery organizes charging device with equilibrium and protect function charge | |
| CN204349478U (en) | A kind of novel batteries charge and discharge balancing device topological circuit | |
| CN203406637U (en) | Battery pack active balancing circuit based on feedback control | |
| CN204258377U (en) | A kind of lithium battery group intelligent balance recovers charger | |
| CN204794196U (en) | Balanced control system of group battery initiative | |
| CN202565002U (en) | Balanced-charging power supply circuit | |
| CN204167919U (en) | A kind of efficient balanced lead-acid battery charger | |
| CN202978315U (en) | Battery energy equalization circuit, battery energy equalization device and energy storage system | |
| CN105811862A (en) | Energy storage power station and energy storage method | |
| CN202333889U (en) | Intelligent balancing device for power battery of electric vehicle | |
| CN202586380U (en) | Novel cell energy balance device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140521 |