CN213782918U - Super capacitor sub-controller - Google Patents
Super capacitor sub-controller Download PDFInfo
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- CN213782918U CN213782918U CN202022758161.0U CN202022758161U CN213782918U CN 213782918 U CN213782918 U CN 213782918U CN 202022758161 U CN202022758161 U CN 202022758161U CN 213782918 U CN213782918 U CN 213782918U
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- battery management
- management chip
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- super capacitor
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Abstract
The utility model discloses a super capacitor sub-controller, include: a battery management chip; the communication interface unit is connected with the battery management chip; the single voltage input unit is connected with the battery management chip; the single voltage balancing unit is connected with the battery management chip; and the monomer temperature access unit is connected with the battery management chip. The utility model discloses a circuit structure is simple, and the components and parts of adoption are less, have improved the reliability of product effectively and have reduced the preparation cost.
Description
Technical Field
The utility model relates to a super capacitor management equipment technical field especially relates to a super capacitor sub-controller.
Background
In order to cope with the current environment and energy crisis, new energy automobiles are vigorously developed to become a consensus of the international society, and electric automobiles also become a necessary trend for the development of the automobile industry in the future. Among them, the energy storage device of the electric vehicle becomes one of the important factors for the development of new energy technology. The super capacitor serving as a novel energy storage device can be used in extremely-low-temperature and other extremely-severe environments, has no environmental pollution, has the characteristics of safety, reliability, wide application range, greenness, environmental friendliness, easiness in maintenance and the like, and is a breakthrough component for improving and solving the application of electric energy and power.
The single working voltage of the super capacitor is not high, mostly between 1V and 4V, and in practical application, a plurality of single capacitors are generally required to be connected in series for use. When the capacitors are connected in series, because parameters (such as capacitance, ESR, leakage current and the like) of each single capacitor have certain difference, voltage at two ends of each single capacitor is unbalanced easily in a heavy current discharging process, partial capacitors are over-charged and over-discharged, and the service life of the capacitors and the reliability of the whole circuit are influenced. Although the difference of the parameters of the super capacitor has small influence on the voltage sharing in the initial stage of application, the influence on the voltage sharing of the super capacitor is larger and larger as the discrete type of the parameters becomes larger in the middle and later stages of the use process, and finally the service life of the super capacitor is shortened sharply. Meanwhile, if the charging current of the capacitor is too large, the working temperature is too high, the voltage of the single body is too high, and the like, safety accidents such as combustion, explosion and the like are easy to happen. In order to avoid the above situations, the conventional method is to uniformly manage the super capacitor by using a super capacitor management system.
In relatively large scale applications, a distributed super capacitor management system is employed. In the distributed super capacitor management system, a master controller and a sub-controller are generally connected through CAN communication. Therefore, the sub-controller must be provided with the MCU and the power conversion circuit, but this results in a complicated circuit and a large number of devices, which is not favorable for reliability and cost control of the product.
To this end, the applicant has sought, through useful research and research, a solution to the above-mentioned problems, in the context of which the technical solutions to be described below have been made.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: aiming at the defects of the prior art, the super-capacitor sub-controller which simplifies the circuit structure, reduces the number of devices, improves the reliability and reduces the preparation cost is provided.
The utility model discloses the technical problem that will solve can adopt following technical scheme to realize:
an ultracapacitor sub-controller comprising:
the battery management chip is used for processing various signals and executing control instructions;
the communication interface unit is connected with the battery management chip and is used for connecting the battery management chip to a super capacitor main controller for data interaction;
the single voltage input unit is connected with the battery management chip and used for acquiring voltage signals of single capacitors and inputting the acquired voltage to the battery management chip for processing;
the single voltage balancing unit is connected with the battery management chip and is used for performing balancing control on the single capacitor according to a control instruction sent by the battery management chip; and
and the monomer temperature access unit is connected with the battery management chip and is used for acquiring the temperature signal of the monomer capacitor and inputting the acquired temperature signal to the battery management chip for processing.
In a preferred embodiment of the present invention, the device further comprises an onboard temperature detection unit connected to the battery management chip for detecting the self temperature of the supercapacitor sub-controller.
Due to the adoption of the technical scheme, the beneficial effects of the utility model reside in that: compared with the current mainstream super capacitor sub-controller, the utility model has the advantages of simple circuit structure, fewer adopted components, effective improvement of product reliability and reduction of preparation cost.
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 following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Referring to fig. 1, a super capacitor sub-controller is provided, which includes a battery management chip 1, a communication interface unit 2, a cell voltage input unit 3, a cell voltage equalization unit 4, a cell temperature access unit 5, and an on-board temperature detection unit 6.
The communication interface unit 2 is connected with the battery management chip 1, and is used for connecting the battery management chip 1 to the super capacitor main controller for data interaction. In this embodiment, the communication interface unit 2 adopts an isopi interface, and the connection terminals of the communication interface unit 2 and the battery management chip 1 can be electrically isolated by a transformer.
The single voltage input unit 3 is connected with the battery management chip 1 and used for acquiring voltage signals of the single capacitors and inputting the acquired voltage to the battery management chip 1 for processing. Specifically, the cell voltage input unit 3 processes the cell voltage by using the resistance-capacitance filter circuit and the overvoltage protection circuit, and outputs the processed cell voltage to the battery management chip 1, so that the measurement of the battery management chip 1 is more accurate, and the battery management chip 1 is protected.
The cell voltage balancing unit 4 is connected with the battery management chip 1 and is used for performing balancing control on the cell capacitors according to the control instruction sent by the battery management chip 1. The cell voltage balancing unit 4 adopts a passive balancing mode, and a discharge resistor controlled by an MOS (metal oxide semiconductor) tube is connected in parallel to each cell capacitor. The conduction state of the MOS tube is controlled by the battery management chip 1. The super capacitor main controller sends a control instruction to the control battery management chip 1 in a communication mode, and the battery management chip 1 controls the on-off of the MOS tube according to the control instruction, so that the balance control of the single capacitor is realized.
The monomer temperature access unit 5 is connected with the battery management chip 1 and used for acquiring temperature signals of the monomer capacitors and inputting the acquired temperature signals to the battery management chip 1 for processing. Specifically, the cell temperature connection unit 5 is used to connect the NTC thermistor to the battery management chip 1, and is composed of a filter circuit and an overvoltage protection circuit. In this embodiment, the cell temperature access unit 5 can access 4 NTC types with 100k 3950B values, and is respectively connected to the first 4 input interfaces for the battery management chip 1.
The on-board temperature detection unit 6 is connected with the battery management chip 1 and is used for detecting the temperature of the super-capacitor sub-controller. When the self temperature of the super-capacitor sub-controller rises to a certain degree due to the equalizing discharge, some protection actions are carried out. The on-board temperature detection unit is composed of two NTC thermistors attached to a circuit board of the super-capacitor sub-controller and a related control circuit. Two NTC thermistors are respectively connected to the 5 th and 6 th path general input interfaces of the battery management chip 1. The type of the NTC thermistor is a 100k 3950B value type.
The working principle of the super capacitor sub-controller of the utility model is as follows:
the super capacitor monomer is connected into the battery management chip 1 through the monomer voltage input unit 3, an external NTC temperature probe is connected into the battery management chip 1 through the monomer temperature access unit 5, and the battery management chip 1 is connected to the super capacitor main controller through the communication interface unit 2. The super capacitor main controller controls the battery management chip 1 to sample the voltage and the temperature of the super capacitor monomer through the communication interface unit 2, and reads voltage and temperature sampling values. The super capacitor main controller controls the single voltage balancing unit 4 through the battery management chip 1 according to a sampling value, the single voltage balancing unit 4 controls the MOS tube switch of the single voltage balancing, and the high-voltage single electric quantity discharge is achieved. Meanwhile, the super-capacitor main controller can also control the onboard temperature detection unit 6 through the battery management chip 1 to realize the measurement of the temperature of the super-capacitor sub-controller, and execute a certain protection strategy according to the temperature values.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A supercapacitor sub-controller, comprising:
the battery management chip is used for processing various signals and executing control instructions;
the communication interface unit is connected with the battery management chip and is used for connecting the battery management chip to a super capacitor main controller for data interaction;
the single voltage input unit is connected with the battery management chip and used for acquiring voltage signals of single capacitors and inputting the acquired voltage to the battery management chip for processing;
the single voltage balancing unit is connected with the battery management chip and is used for performing balancing control on the single capacitor according to a control instruction sent by the battery management chip; and
and the monomer temperature access unit is connected with the battery management chip and is used for acquiring the temperature signal of the monomer capacitor and inputting the acquired temperature signal to the battery management chip for processing.
2. The supercapacitor sub-controller of claim 1, further comprising an on-board temperature detection unit connected to the battery management chip for detecting its own temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022758161.0U CN213782918U (en) | 2020-11-25 | 2020-11-25 | Super capacitor sub-controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022758161.0U CN213782918U (en) | 2020-11-25 | 2020-11-25 | Super capacitor sub-controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213782918U true CN213782918U (en) | 2021-07-23 |
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| CN202022758161.0U Active CN213782918U (en) | 2020-11-25 | 2020-11-25 | Super capacitor sub-controller |
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| CN (1) | CN213782918U (en) |
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2020
- 2020-11-25 CN CN202022758161.0U patent/CN213782918U/en active Active
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