CN218276123U - Charging control device of multi-series-parallel lithium battery pack - Google Patents
Charging control device of multi-series-parallel lithium battery pack Download PDFInfo
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- CN218276123U CN218276123U CN202221933909.9U CN202221933909U CN218276123U CN 218276123 U CN218276123 U CN 218276123U CN 202221933909 U CN202221933909 U CN 202221933909U CN 218276123 U CN218276123 U CN 218276123U
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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
The utility model discloses a charge control device of many strings of lithium cell group, include: the charging control circuits are respectively used for independently charging each lithium battery cell in the multi-series parallel lithium battery pack; each of the charge control circuits includes: the charging circuit comprises a DC-DC power supply module, a diode for preventing current from flowing backwards, a charging switch and a charging overvoltage protection module which are mutually connected in a circuit manner; and the charging controller is used for connecting and controlling each charging switch. By independently charging each lithium battery cell by using the independent charging control circuit, the problem that the existing series connection total voltage charging has high requirement on the consistency of the battery cells is solved, and the effective service time of the battery is prolonged.
Description
Technical Field
The utility model relates to a lithium battery charging control technical field especially relates to a charge control device of many strings of lithium cell groups.
Background
Most of lithium battery products in the market at present adopt a control mode of charging with a series total voltage, the charging voltage is high, the charger cost is high, the requirement on the consistency of each battery cell is high, the matching requirement in the production and manufacturing process is strict, the matching limiting conditions are more and difficult to match and control, a balancing circuit is generally added, but a passive power consumption type balancing method is mostly adopted for adding the balancing circuit, so that the problems of partial energy waste, reduction of the effective service time of the battery and the like exist.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide a charge control device of many strings of parallel lithium cell group for overcome current series connection total voltage and charged the problem that requires high to electric core uniformity, improved the effective live time of battery.
In view of this purpose, the embodiment of the present invention provides a charge control device for a multi-serial-parallel lithium battery pack, including: the charging control circuits are respectively connected with the charging port and the discharging port, and each charging control circuit is respectively used for independently charging each lithium battery cell in the multi-series parallel lithium battery pack; each path of the charging control circuit comprises: the charging circuit comprises a DC-DC power supply module, a diode for preventing current from flowing backwards, a charging switch and a charging overvoltage protection module which are mutually connected in a circuit manner; and the charging controller is electrically connected with each charging switch.
Further, the charging overvoltage protection module is electrically connected with the charging switch.
Furthermore, the charge control device further comprises a plurality of voltage sampling circuits, the charge controller is electrically connected with the voltage sampling circuits, each voltage sampling circuit is used for detecting the voltage of each lithium battery cell, and if the voltage value exceeds a preset voltage, the charge controller is used for switching off the corresponding charge switch.
Furthermore, the charge control device further comprises a plurality of paths of current sampling circuits, the charge controller is electrically connected with the current sampling circuits, each path of current sampling circuit is used for detecting the current of each lithium battery cell, and if the current value exceeds the preset current, the charge controller is used for switching off the corresponding charge switch.
Furthermore, the charge control device further comprises a plurality of paths of temperature sensors, the charge controller is electrically connected with the temperature sensors, each path of temperature sensors is used for respectively collecting the temperature of each lithium battery cell, and if the temperature does not accord with the preset temperature, the charge controller is used for controlling the corresponding disconnection of the charge switch.
Furthermore, the charging control device also comprises a plurality of paths of charging capacity registers, the charging controller is electrically connected with the charging capacity registers, and the charging controller is used for judging the aging or the fault of a certain power saving core.
Further, the charging controller is electrically connected with the charging indication circuit.
The utility model has the advantages that: the embodiment of the utility model provides a charge control device of many strings of parallel lithium cell group, include: the charging control circuits are respectively used for independently charging each lithium battery cell in the multi-series parallel lithium battery pack; each of the charge control circuits includes: the charging circuit comprises a DC-DC power supply module, a diode for preventing current from flowing backwards, a charging switch and a charging overvoltage protection module which are mutually connected in a circuit manner; and the charging controller is used for connecting and controlling each charging switch. By independently charging each lithium battery cell by using the independent charging control circuit, the problem that the existing series total voltage charging has high requirement on the consistency of the battery cells is solved, and the effective service time of the battery is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic block diagram of a charging control apparatus for a multi-serial-parallel lithium battery pack according to an embodiment of the present invention;
fig. 2 is an internal block diagram of a charge control circuit of a charge control device for a multi-serial-parallel lithium battery pack according to an embodiment of the present invention.
Detailed Description
An embodiment of the utility model provides a charge control device of many strings of lithium cell groups for overcome current series connection total voltage and charged the problem that requires highly to electric core uniformity, improved the effective live time of battery.
To make the objects, features and advantages of the present invention more obvious and understandable, the embodiments of the present invention are clearly and completely described in the embodiments of the present invention with reference to the drawings, and obviously, the embodiments described below are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, fig. 1 is a schematic block diagram of a charging control device for a multi-serial-parallel lithium battery pack, as shown in fig. 1, the charging control device for the multi-serial-parallel lithium battery pack includes: the charging control circuits are respectively connected with the charging port and the discharging port, and each charging control circuit is respectively used for independently charging the battery cell of each lithium battery pack in the multiple series-parallel lithium battery packs;
in a specific embodiment, as shown in fig. 1, the charging control circuit 1 may include a 1 st charging control circuit, a 2 nd charging control circuit, and an nth charging control circuit; each charging control circuit corresponds to an independent one-section multi-series parallel lithium battery pack.
Specifically, each of the charge control circuits includes: a DC-DC power supply module, a diode (not shown in the figure) for preventing current from reversely flowing, a charging switch and a charging overvoltage protection module;
in a specific embodiment, as shown in fig. 2, the 1 st path charging control circuit includes a 1 st path DC-DC power module, a 1 st path charging switch, a 1 st path charging overvoltage protection module, and a diode for preventing current from flowing backwards; by analogy, the 2 nd path charging control circuit comprises a 2 nd path DC-DC power supply module, a 1 st path charging switch, a 1 st path charging overvoltage protection module and a diode for preventing current from flowing backwards; the Nth charging control circuit comprises an Nth DC-DC power supply module, an Nth charging switch, an Nth charging overvoltage protection module and a diode for preventing current from flowing backwards;
and the charging controller is used for connecting and controlling each charging switch and controlling the disconnection or connection of the charging switches.
The working principle is as follows: the independent charging control circuit can realize independent charging of each section of the multi-series-parallel lithium battery pack and protection control of the charging switch through the charging controller, and has the functions of charging overcurrent, overvoltage, overtemperature, undertemperature and battery cell aging fault charging stopping protection. The problems that multiple series-parallel lithium battery packs have high requirements on the consistency of the battery cells, the production process is difficult to match and manage, and the energy waste caused by the addition of an equalizing circuit is avoided. And simultaneously, the effective service time of the battery is prolonged.
Further, the charging overvoltage protection module is used for automatically disconnecting charging when detecting that the cell voltage exceeds a limit value.
Specifically, each path of charge control circuit includes a charge overvoltage protection module, and when it is detected that the voltage of the battery cell exceeds a limit value, the charge overvoltage protection module controls the battery to automatically disconnect the charging.
Furthermore, the charging control device further comprises a plurality of paths of voltage sampling circuits, the charging controller is electrically connected with the voltage sampling circuits, each path of voltage sampling circuit is used for detecting the voltage of each lithium battery cell, and if the voltage value exceeds the preset voltage, the charging controller is used for switching off the corresponding charging switch.
Specifically, the voltage sampling circuit is an ADC voltage sampling circuit, and when the detected voltage value exceeds a preset voltage value, the charge controller turns off the corresponding charge switch.
Furthermore, the charging control device further comprises a plurality of paths of current sampling circuits, the charging controller is electrically connected with the current sampling circuits, each path of current sampling circuit is used for detecting the current of each lithium battery cell, and if the current value exceeds the preset current, the charging controller is used for switching off the corresponding charging switch.
Specifically, the current of each lithium battery cell is detected through a current sampling circuit, and if the current value exceeds a preset current, the charging controller turns off the corresponding charging switch.
Furthermore, the charge control device further comprises a plurality of paths of temperature sensors, the charge controller is electrically connected with the temperature sensors, each path of temperature sensors is used for respectively collecting the temperature of each section of lithium battery cell, and if the temperature does not accord with the preset temperature, the charge controller is used for controlling the disconnection of the corresponding charge switch.
Specifically, according to the temperature of each lithium battery cell detected by the temperature sensor, if the temperature is too high or too low, the charging controller performs corresponding processing, and the charging switch is turned off when the temperature is too high or too low.
In addition, the charging control device also comprises a plurality of paths of charging capacity registers, the charging controller is electrically connected with the plurality of paths of charging capacity registers, each path of charging capacity register is used for calculating and storing the electric quantity charged by each path when charging is completed according to the voltage values and the current values of the voltage sampling circuit and the current sampling circuit, and the charging controller is used for comparing and judging the aging or the fault of the electricity-saving core when the deviation of the electric quantity of a certain path exceeds the preset limit.
Furthermore, the charging controller is electrically connected with the charging indicating circuit, and the current charging state is displayed through the charging indicating circuit.
To sum up, the embodiment of the utility model provides a charge control device of many strings of parallel lithium cell group, include: the charging control circuits are respectively used for independently charging each lithium battery cell in the multi-series parallel lithium battery pack; each of the charge control circuits includes: the charging circuit comprises a DC-DC power supply module, a diode for preventing current from flowing backwards, a charging switch and a charging overvoltage protection module which are mutually connected in a circuit manner; and the charging controller is used for connecting and controlling each charging switch. By independently charging each lithium battery cell by using the independent charging control circuit, the problem that the existing series total voltage charging has high requirement on the consistency of the battery cells is solved, and the effective service time of the battery is prolonged.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. A charging control device of a multi-series-parallel lithium battery pack is characterized by comprising: the charging control circuits are respectively connected with the charging port and the discharging port, and each charging control circuit is respectively used for independently charging each lithium battery cell in the multi-series parallel lithium battery pack;
each path of the charging control circuit comprises: the charging circuit comprises a DC-DC power supply module, a diode for preventing current from flowing backwards, a charging switch and a charging overvoltage protection module which are mutually connected in a circuit manner;
and the charging controller is electrically connected with each charging switch.
2. The charging control device of the multi-series-parallel lithium battery pack according to claim 1, wherein the charging overvoltage protection module is electrically connected to the charging switch.
3. The charging control device of claim 1, further comprising a plurality of voltage sampling circuits, wherein the charging control device is electrically connected to the voltage sampling circuits, each voltage sampling circuit is configured to detect a voltage of each lithium battery cell, and the charging control device is configured to turn off the corresponding charging switch if a voltage value exceeds a preset voltage.
4. The charging control device of claim 1, further comprising a plurality of current sampling circuits, wherein the charging controller is electrically connected to the current sampling circuits, each current sampling circuit is configured to detect a current of each lithium battery cell, and the charging controller is configured to turn off the corresponding charging switch if a current value exceeds a predetermined current.
5. The charging control device of the multi-series-parallel lithium battery pack according to claim 1, further comprising a plurality of temperature sensors, wherein the charging controller is electrically connected to the temperature sensors, each temperature sensor is configured to collect a temperature of each lithium battery cell, and if the temperature does not meet a preset temperature, the charging controller is configured to control the corresponding charging switch to be turned off.
6. The charging control device of claim 1, further comprising a plurality of charging capacity registers, wherein the charging controller is electrically connected to the charging capacity registers, and the charging controller is configured to determine a cell aging or a cell failure.
7. The charging control device for a multi-serial lithium battery pack according to claim 1, wherein the charging controller is electrically connected to the charging indication circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221933909.9U CN218276123U (en) | 2022-07-25 | 2022-07-25 | Charging control device of multi-series-parallel lithium battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221933909.9U CN218276123U (en) | 2022-07-25 | 2022-07-25 | Charging control device of multi-series-parallel lithium battery pack |
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| Publication Number | Publication Date |
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| CN218276123U true CN218276123U (en) | 2023-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221933909.9U Active CN218276123U (en) | 2022-07-25 | 2022-07-25 | Charging control device of multi-series-parallel lithium battery pack |
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| CN (1) | CN218276123U (en) |
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2022
- 2022-07-25 CN CN202221933909.9U patent/CN218276123U/en active Active
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