CN114069794A - BMS equalizing battery management circuit based on multiple communication modes - Google Patents
BMS equalizing battery management circuit based on multiple communication modes Download PDFInfo
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- CN114069794A CN114069794A CN202111404873.5A CN202111404873A CN114069794A CN 114069794 A CN114069794 A CN 114069794A CN 202111404873 A CN202111404873 A CN 202111404873A CN 114069794 A CN114069794 A CN 114069794A
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- 239000003990 capacitor Substances 0.000 claims description 17
- 101150008604 CAN1 gene Proteins 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the technical field of battery management, in particular to a BMS (battery management system) equalizing battery management circuit based on multiple communication modes, which comprises a battery self-discharge circuit, a battery cell equalizing circuit, an electric quantity indicating module, a 485 communication circuit and a CAN (controller area network) communication circuit, wherein the battery self-discharge circuit is electrically connected with the battery cell equalizing circuit; various communication interfaces are added to the battery through the 485 communication circuit and the CAN communication circuit, communication protocols such as serial ports, CANBUS, RS485, SMBUS and the like are supported, and the application range of the battery is expanded.
Description
Technical Field
The invention relates to the technical field of battery management, in particular to a BMS (battery management system) balanced battery management circuit based on multiple communication modes.
Background
Energy shortage is an important problem influencing the development of national economy in China and is also a common concern all over the world. Energy conservation and emission reduction are long-term strategic guidelines for economic and social development in China and are also a very urgent task at present. The new energy automobile power battery in China accounts for more than 85% of the whole world, and the improvement of the power battery pack is important. In consideration of the advantages of abundant rare earth resources and listed battery output in China, the development of a high-energy quick-charging super-general long-stroke modular composite power battery pack is imperative.
When the existing electric automobile is charged, the communication interface is single, and the application range is small.
Disclosure of Invention
The invention aims to provide a BMS (battery management system) balanced battery management circuit based on multiple communication modes, and aims to solve the technical problems that in the prior art, when an electric automobile is charged, a communication interface is single, and the application range is small.
In order to achieve the purpose, the invention provides a multi-communication-mode-based BMS equalization battery management circuit, which comprises a battery self-discharge circuit, a battery cell equalization circuit, an electric quantity indicating module, a 485 communication circuit and a CAN communication circuit, wherein the battery self-discharge circuit is electrically connected with the battery cell equalization circuit, and the battery cell equalization circuit, the 485 communication circuit and the CAN communication circuit are electrically connected with the electric quantity indicating module;
the 485 communication circuit comprises a chip U5, a resistor R30, a resistor R33, a diode D2, a diode D3, a diode D4 and an external connector RS1, wherein one end of the resistor R30 is electrically connected with a 7 pin of the chip U5, the other end of the resistor R30 is grounded, one end of the diode D2 is grounded, the other end of the diode D2 is electrically connected with a 7 pin of the chip U5, a 2 pin of the diode D3 and a 2 pin of the external connector RS1, one end of the resistor R33 is electrically connected with a 6 pin of the chip U5, the other end of the resistor R33 is grounded, one end of the diode D4 is grounded, and the other end of the diode D4 is electrically connected with a 6 pin of the chip U5, a diode D3 and a 3 pin of the external connector RS 1.
The CAN communication circuit comprises a capacitor C18, a capacitor C19, a resistor R32 and an external connector CAN1, wherein 3 pins of a chip U4 are electrically connected with one ends of the capacitor C19 and the capacitor C18 in sequence, the other ends of the capacitor C19 and the capacitor C18 are grounded, 7 pins and 6 pins of the chip U4 are electrically connected with two ends of the resistor R32 respectively, and 1 pin and 2 pins of the external connector CAN1 are electrically connected with two ends of the resistor R32 respectively.
The battery self-discharge circuit comprises a resistor R2, a resistor R3, a resistor R6 and a MOS transistor Q2, wherein the resistor R2 is connected with the resistor R3 in parallel, one end of the resistor R3 is electrically connected with the drain of the MOS transistor Q2, the source of the MOS transistor Q2 is grounded, and the grid of the MOS transistor Q2 is electrically connected with the resistor R6.
SP485 is adopted as the chip U5, and TJA1050T is adopted as the chip U4.
The electric quantity indication module adopts an STM32F10338T6 single chip microcomputer.
Wherein the diode D2, the diode D3 and the diode D4 are all diacs.
According to the BMS balanced battery management circuit based on multiple communication modes, when a certain battery cell is boosted, the battery cell is discharged through the battery self-discharge circuit to protect the battery cell, and the battery cell is balanced through the battery cell balancing circuit to protect circuit elements; various communication interfaces are added to the battery through the 485 communication circuit and the CAN communication circuit, communication protocols such as a serial port, CANBUS, RS485, SMBUS and the like are supported, and the application range of the battery is expanded.
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 the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of a power indication module according to the present invention.
Fig. 2 is a schematic circuit diagram of a battery self-discharge circuit provided by the present invention.
Fig. 3 is a circuit schematic diagram of the cell balancing circuit provided in the present invention.
Fig. 4 is a schematic circuit diagram of a 485 communication circuit provided by the present invention.
Fig. 5 is a schematic circuit diagram of a CAN communication circuit provided by the present invention.
Fig. 6 is a schematic circuit diagram of the presence detection circuit provided by the present invention.
Fig. 7 is a circuit schematic diagram of a switching circuit provided by the present invention.
Fig. 8 is a schematic circuit diagram of an external module according to the present invention.
Fig. 9 is an interface diagram of the single chip microcomputer provided by the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 9, the invention provides a multi-communication mode-based BMS equalizing battery management circuit, which includes a battery self-discharge circuit, a cell equalizing circuit, a power indication module, a 485 communication circuit and a CAN communication circuit, wherein the battery self-discharge circuit is electrically connected with the cell equalizing circuit, and the cell equalizing circuit, the 485 communication circuit and the CAN communication circuit are electrically connected with the power indication module; the 485 communication circuit comprises a chip U5, a resistor R30, a resistor R33, a diode D2, a diode D3, a diode D4 and an external connector RS1, wherein one end of the resistor R30 is electrically connected with a 7 pin of the chip U5, the other end of the resistor R30 is grounded, one end of the diode D2 is grounded, the other end of the diode D2 is respectively electrically connected with a 7 pin of the chip U5, a 2 pin of the diode D3 and a 2 pin of the external connector RS1, one end of the resistor R33 is electrically connected with a 6 pin of the chip U5, the other end of the resistor R33 is grounded, one end of the diode D4 is grounded, and the other end of the diode D4 is respectively electrically connected with a 6 pin of the chip U5, a 3 pin of the diode D3 and a 3 pin of the external connector RS 1; the CAN communication circuit comprises a capacitor C18, a capacitor C19, a resistor R32 and an external connector CAN1, wherein a pin 3 of a chip U4 is electrically connected with one ends of the capacitor C19 and the capacitor C18 in sequence, the other ends of the capacitor C19 and the capacitor C18 are grounded, a pin 7 and a pin 6 of the chip U4 are electrically connected with two ends of the resistor R32 respectively, and a pin 1 and a pin 2 of the external connector CAN1 are electrically connected with two ends of the resistor R32 respectively; the battery self-discharge circuit comprises a resistor R2, a resistor R3, a resistor R6 and a MOS transistor Q2, wherein the resistor R2 is connected with the resistor R3 in parallel, one end of the resistor R3 is electrically connected with the drain of the MOS transistor Q2, the source of the MOS transistor Q2 is grounded, and the grid of the MOS transistor Q2 is electrically connected with the resistor R6.
In this embodiment, the chip U5 employs SP485, and the chip U4 employs TJA 1050T; the electric quantity indication module adopts an STM32F10338T6 singlechip; the diode D2, the diode D3 and the diode D4 are all diacs; when a certain electric core is boosted, the battery self-discharge circuit discharges electricity for the electric core to protect the electric core, and the electric core balancing circuit realizes the balancing of the electric core so as to protect circuit elements; various communication interfaces are added to the battery through the 485 communication circuit and the CAN communication circuit, communication protocols such as a serial port, CANBUS, RS485, SMBUS and the like are supported, and the application range of the battery is expanded.
Further, the BMS balancing battery management circuit based on multiple communication modes further comprises an on-site detection circuit, the on-site detection circuit comprises a resistor R35, a resistor R37, a resistor R38 and a MOS transistor Q8, a drain of the MOS transistor Q8 is electrically connected with the resistor R35, a source of the MOS transistor Q8 is grounded, and a gate of the MOS transistor Q8 is electrically connected with the resistor R37.
In this embodiment, when the current value in the presence detection circuit exceeds a preset value, the MOS transistor Q8 controls the on/off of the circuit, thereby protecting the elements in the circuit.
Further, the multi-communication mode-based BMS balancing battery management circuit further comprises a switch circuit, the switch circuit comprises a switch KEY1 and a resistor R36, one end of the switch KEY1 is grounded, and the other end of the switch KEY1 is electrically connected with the resistor R36.
In this embodiment, when the current value in the in-place detection circuit exceeds the preset value, the switch KEY1 is controlled by the single chip microcomputer to cut off the power supply of the single chip microcomputer, so as to protect the single chip microcomputer.
Furthermore, the BMS balancing battery management circuit based on the multiple communication modes further comprises an external module, and the external module is electrically connected with the electric quantity indicating module.
In the embodiment, the external module provides interfaces of the UARY1 and the IICI, so that the application range is expanded.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A BMS balancing battery management circuit based on multiple communication modes is characterized in that,
the BMS balanced battery management circuit based on multiple communication modes comprises a battery self-discharge circuit, a battery cell balanced circuit, an electric quantity indicating module, a 485 communication circuit and a CAN communication circuit, wherein the battery self-discharge circuit is electrically connected with the battery cell balanced circuit, and the battery cell balanced circuit, the 485 communication circuit and the CAN communication circuit are electrically connected with the electric quantity indicating module;
the 485 communication circuit comprises a chip U5, a resistor R30, a resistor R33, a diode D2, a diode D3, a diode D4 and an external connector RS1, wherein one end of the resistor R30 is electrically connected with a 7 pin of the chip U5, the other end of the resistor R30 is grounded, one end of the diode D2 is grounded, the other end of the diode D2 is electrically connected with a 7 pin of the chip U5, a 2 pin of the diode D3 and a 2 pin of the external connector RS1, one end of the resistor R33 is electrically connected with a 6 pin of the chip U5, the other end of the resistor R33 is grounded, one end of the diode D4 is grounded, and the other end of the diode D4 is electrically connected with a 6 pin of the chip U5, a diode D3 and a 3 pin of the external connector RS 1.
2. The multi-communication mode-based BMS balancing battery management circuit of claim 1,
the CAN communication circuit comprises a capacitor C18, a capacitor C19, a resistor R32 and an external connector CAN1, wherein 3 pins of a chip U4 are sequentially connected with the capacitor C19 and one end of the capacitor C18 are electrically connected, the capacitor C19 and the other end of the chip U18 are all grounded, 7 pins and 6 pins of the chip U4 are respectively electrically connected with two ends of the resistor R32, and 1 pin and 2 pins of the external connector CAN1 are respectively electrically connected with two ends of the resistor R32.
3. The multi-communication mode-based BMS balancing battery management circuit of claim 2,
the battery self-discharge circuit comprises a resistor R2, a resistor R3, a resistor R6 and a MOS transistor Q2, wherein the resistor R2 is connected with the resistor R3 in parallel, one end of the resistor R3 is electrically connected with the drain of the MOS transistor Q2, the source of the MOS transistor Q2 is grounded, and the grid of the MOS transistor Q2 is electrically connected with the resistor R6.
4. The multi-communication mode-based BMS balancing battery management circuit of claim 3,
SP485 is adopted by the chip U5, and TJA1050T is adopted by the chip U4.
5. The multi-communication mode-based BMS balancing battery management circuit of claim 4,
and the electric quantity indication module adopts an STM32F10338T6 singlechip.
6. The multi-communication mode-based BMS balancing battery management circuit of claim 4,
the diode D2, the diode D3, and the diode D4 are all diacs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111404873.5A CN114069794B (en) | 2021-11-24 | 2021-11-24 | BMS balanced battery management circuit based on multiple communication modes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111404873.5A CN114069794B (en) | 2021-11-24 | 2021-11-24 | BMS balanced battery management circuit based on multiple communication modes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114069794A true CN114069794A (en) | 2022-02-18 |
| CN114069794B CN114069794B (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111404873.5A Active CN114069794B (en) | 2021-11-24 | 2021-11-24 | BMS balanced battery management circuit based on multiple communication modes |
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| CN114069794B (en) | 2024-01-16 |
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