CN217159298U - Battery pack charging and discharging active equalization device - Google Patents
Battery pack charging and discharging active equalization device Download PDFInfo
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- CN217159298U CN217159298U CN202122782805.4U CN202122782805U CN217159298U CN 217159298 U CN217159298 U CN 217159298U CN 202122782805 U CN202122782805 U CN 202122782805U CN 217159298 U CN217159298 U CN 217159298U
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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
A battery pack charging and discharging active balancing device comprises a DC-DC converter corresponding to each battery in a plurality of batteries connected in parallel and a master control system of a battery management system BMS, wherein the batteries are respectively connected with a charging interface and a discharging interface through the corresponding DC-DC converters, and each battery and each DC-DC converter are respectively connected with the master control system of the battery management system BMS through a CAN bus. The balancing device independently controls the DC-DC converter corresponding to each battery according to the data of the real-time voltage electric quantity of each battery through the master control system of the battery management system BMS, and further ensures the voltage electric quantity balance of each battery when charging and discharging are finished through independently controlling the charging and discharging quantity of each battery in unit time, thereby effectively prolonging the service life of the battery pack.
Description
Technical Field
The utility model relates to a balanced device of group battery charge-discharge initiative belongs to the automatic regulation and control technical field of electronic agricultural machinery group battery charge-discharge.
Background
The existing electric agricultural machinery generally adopts a plurality of storage batteries connected in parallel to supply power, and each storage battery is connected to a concentrator and then is charged and discharged through the concentrator. The existing electric agricultural machine is not provided with a voltage and electric quantity balancing device for charging and discharging of the parallel storage batteries, and the conditions that the voltage and electric quantity of the storage batteries are high and the voltage and electric quantity of the storage batteries are low in the charging and discharging processes of the storage batteries can be caused due to the fact that the states of the parallel storage batteries are possibly different (for example, the internal resistances of the storage batteries are different and the voltage and electric quantity of the storage batteries are different), so that the storage battery pack can be stopped working due to failure reporting, and the service life of the storage batteries is further shortened.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the defect of the no voltage electric quantity initiative equalizer function of charge-discharge to current parallelly connected group battery, a new group battery charge-discharge initiative equalizer device is provided, this equalizer device carries out independent control according to the data of every battery real-time voltage electric quantity to the DC-DC converter that every battery corresponds through battery management system BMS's major control system, through the charge-discharge volume in the every battery unit interval of independent control, and then the voltage electric quantity of every battery is balanced when guaranteeing the charge-discharge to end, effectively improve the life of group battery.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a battery pack charging and discharging active balancing device comprises a plurality of batteries connected in parallel, a DC-DC converter corresponding to each battery and a master control system of a battery management system BMS, wherein the batteries are respectively connected with a charging interface and a discharging interface through the corresponding DC-DC converters, and each battery and each DC-DC converter are respectively connected with the master control system of the battery management system BMS through a CAN bus.
By adopting the technical scheme, the battery pack charging and discharging active balancing device is provided, the DC-DC converter corresponding to each battery is independently controlled by the main control system of the battery management system BMS according to the data of the real-time voltage and electric quantity of each battery, the charging and discharging quantity of each battery in unit time is independently controlled, the voltage and electric quantity balance of each battery when charging and discharging are finished is further ensured, and the service life of the battery pack is effectively prolonged.
The utility model discloses a further set up to: the battery is connected with the charging interface and the discharging interface through the non-isolated bidirectional DC-DC converter.
By adopting the technical scheme, the arrangement of internal electric devices is simplified by adopting the non-isolated bidirectional DC-DC converter, and the occupation of the electric devices on the space is effectively reduced.
The utility model discloses a further set up to: direct current fuses are arranged between the battery and the DC-DC converter, and the direct current fuses are arranged between the DC-DC converter and the charging interface and between the DC-DC converter and the discharging interface.
By adopting the technical scheme, the fuses for protection are arranged between the DC-DC converter and the battery and between the DC-DC converter and the charge-discharge interface, so that the condition that the electric device is damaged due to overhigh voltage can be effectively ensured.
The utility model discloses main beneficial effect is:
1. the novel balancing device independently controls the DC-DC converter corresponding to each battery through a main control system of a battery management system BMS according to the real-time voltage and electric quantity data of each battery, and ensures the voltage and electric quantity balance of each battery when charging and discharging are finished through independently controlling the charging and discharging quantity of each battery in unit time, thereby effectively prolonging the service life of a battery pack;
2. the novel battery is connected with the charging interface and the discharging interface through the non-isolated bidirectional DC-DC converter, the arrangement of internal electric devices is simplified by adopting the bidirectional DC-DC converter, and the occupation of the electric devices on the space is effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1, a battery pack charging and discharging active balancing device includes 8 non-isolated bidirectional DC-DC converters and a main control system of a battery management system BMS, the 8 non-isolated bidirectional DC-DC converters correspond to 8 batteries connected in parallel one by one, the batteries are respectively connected with a charging interface and a discharging interface through the corresponding non-isolated bidirectional DC-DC converters, and each battery and each DC-DC converter are respectively connected with the main control system of the battery management system BMS through a CAN bus. A direct current fuse is arranged between each battery and the corresponding non-isolated bidirectional DC-DC converter, and a direct current fuse is arranged between each DC-DC converter and the charging interface and the discharging interface. The battery management system BMS main control system is connected with external equipment through a CAN bus.
The use principle is as follows: in the discharging process, the voltage and the electric quantity of each battery are compared, then the voltage and the electric quantity are sequenced from high to low, a battery management system BMS main control system controls the output current of a non-isolated bidirectional DC-DC converter in sequence, the current output with high voltage and electric quantity is large, the current output with low voltage and electric quantity is small, and therefore the fact that the voltage and the electric quantity of each battery can be basically consistent after discharging is finally guaranteed; in the charging process, the voltage and the electric quantity of each battery are compared, then the voltage and the electric quantity are sequenced from high to low, the battery management system BMS is controlled by sequentially controlling the output current of the non-isolated bidirectional DC-DC converter, the current output with high voltage and electric quantity is small, the current output with low voltage and electric quantity is large, and finally the voltage and the electric quantity of each battery can be basically consistent after the charging is finished. The consistency of the final voltage and the electric quantity of the parallel battery pack in charging and discharging is realized through the mode, and the frequent occurrence of faults or the reduction of the service life of the battery pack caused by the overlarge voltage and electric quantity difference of each battery of the battery pack is prevented.
Claims (3)
1. The utility model provides a group battery charge-discharge initiative balancing unit which characterized in that: the system comprises a DC-DC converter corresponding to each battery in a plurality of batteries connected in parallel and a main control system of a battery management system BMS, wherein the batteries are respectively connected with a charging interface and a discharging interface through the corresponding DC-DC converters, and each battery and each DC-DC converter are respectively connected with the main control system of the battery management system BMS through a CAN bus; in the discharging process, the voltage and the electric quantity of each battery are compared, then the voltage and the electric quantity are sequenced from high to low, the main control system controls and controls the output current of the DC-DC converter in sequence, the current output with high voltage and electric quantity is large, the current output with low voltage and electric quantity is small, and therefore the fact that the voltage and the electric quantity of each battery can be basically consistent after discharging is finished is ensured; in the charging process, the voltage and the electric quantity of each battery are also compared, then the voltage and the electric quantity are sequenced from high to low, the main control system controls the output current of the DC-DC converter in sequence, the current output with high voltage and electric quantity is small, the current output with low voltage and electric quantity is large, and finally the voltage and the electric quantity of each battery can be basically consistent after the charging is finished.
2. The active charge and discharge equalizing device for battery pack according to claim 1, wherein: the battery is connected with the charging interface and the discharging interface through the non-isolated bidirectional DC-DC converter.
3. The active charge and discharge equalization device for battery pack according to claim 2, characterized in that: a direct current fuse is arranged between the battery and the DC-DC converter, and direct current fuses are arranged between the DC-DC converter and the charging interface and between the DC-DC converter and the discharging interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122782805.4U CN217159298U (en) | 2021-11-15 | 2021-11-15 | Battery pack charging and discharging active equalization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122782805.4U CN217159298U (en) | 2021-11-15 | 2021-11-15 | Battery pack charging and discharging active equalization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217159298U true CN217159298U (en) | 2022-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202122782805.4U Active CN217159298U (en) | 2021-11-15 | 2021-11-15 | Battery pack charging and discharging active equalization device |
Country Status (1)
| Country | Link |
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| CN (1) | CN217159298U (en) |
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2021
- 2021-11-15 CN CN202122782805.4U patent/CN217159298U/en active Active
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