CN215817612U - BMS battery management system charge-discharge circuit based on battery management chip - Google Patents
BMS battery management system charge-discharge circuit based on battery management chip Download PDFInfo
- Publication number
- CN215817612U CN215817612U CN202122168250.4U CN202122168250U CN215817612U CN 215817612 U CN215817612 U CN 215817612U CN 202122168250 U CN202122168250 U CN 202122168250U CN 215817612 U CN215817612 U CN 215817612U
- Authority
- CN
- China
- Prior art keywords
- battery management
- resistor
- management chip
- pin
- capacitor
- 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.)
- Active
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 50
- 238000007599 discharging Methods 0.000 claims abstract description 13
- 108010077333 CAP1-6D Proteins 0.000 claims description 3
- 101000897856 Homo sapiens Adenylyl cyclase-associated protein 2 Proteins 0.000 claims description 3
- 101000836079 Homo sapiens Serpin B8 Proteins 0.000 claims description 3
- 101000798702 Homo sapiens Transmembrane protease serine 4 Proteins 0.000 claims description 3
- 102100029500 Prostasin Human genes 0.000 claims description 3
- 102100032471 Transmembrane protease serine 4 Human genes 0.000 claims description 3
- 108010031970 prostasin Proteins 0.000 claims description 3
- 238000001914 filtration Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A charging and discharging circuit of a BMS battery management system based on a battery management chip is connected with an NTC thermistor through an interface, and can realize the collection of temperature data of a battery pack. The capacitor I plays a role in filtering, the resistor III and the resistor IV are pull-up resistors, the resistor V is a pull-up resistor, the battery management chip controls the on-off of the MOS transistor I, the resistor VI is a current-limiting resistor, the battery management chip controls the on-off of the MOS transistor II, the resistor VII is a sampling resistor, and the resistor VIII, the capacitor IV, the capacitor V, the capacitor VI and the resistor IX form an RC filter circuit. The SRN pin of the battery management chip is connected with the resistor VIII and used for collecting voltage difference between two ends of the resistor VII, so that charging and discharging current is obtained, detection of the charging and discharging current of the BMS battery management system is realized, and safety of the BMS battery management system is improved.
Description
Technical Field
The utility model relates to the technical field of lithium battery management, in particular to a battery management chip-based BMS battery management system charging and discharging circuit.
Background
With the development of battery technology, lithium ion batteries have the advantages of small size, light weight, high energy density, no memory effect, small self-discharge, long cycle life and the like, and are widely applied to the fields of new energy automobiles, photovoltaic energy storage and the like. The BMS is called a battery management system, and is mainly used for carrying out data acquisition, analysis, state estimation and management on parameters such as electrical characteristics and thermal characteristics of each battery unit, improving the utilization rate of the battery, preventing the battery from being overcharged and overdischarged and prolonging the service life of the battery.
The charging and discharging circuits of the existing BMS battery management system are mostly lack of protection functions, charging overshoot is easy to generate, the charging current is too large, the charging circuit is overheated, and the like, so that the service life of the battery is shortened, and even safety accidents are caused.
Disclosure of Invention
In order to overcome the defects of the technology, the utility model provides the battery management chip-based BMS battery management system charging and discharging circuit which can acquire temperature data and charging and discharging current in real time.
The technical scheme adopted by the utility model for overcoming the technical problems is as follows:
a BMS battery management system charge and discharge circuit based on battery management chip includes:
the battery management chip is characterized in that a VC15 pin of the battery management chip is connected to one end of a resistor I, the other end of the resistor I is respectively connected to a power supply, a 16 pin of a battery pack interface and a VIN pin of a power supply interface, a VC0 pin of the battery management chip is connected to a 1 pin of the battery pack interface through a resistor II, a CAP2 pin of the battery management chip is connected to a VC5X pin through a capacitor I, a TS2 pin and a VC5X pin of the battery management chip are connected to an interface used for connecting an NTC thermistor, a VSS pin of the battery management chip is grounded, an SCL pin of the battery management chip is connected to a 3.3V power supply through a resistor III, and an SDA pin of the battery management chip is connected to a 3.3V power supply through a resistor IV;
the grid electrode of the MOS tube I is connected to the CHG pin of the battery management chip through a resistor V, and the source electrode of the MOS tube I is connected to the GND pin of the power interface;
the grid electrode of the MOS transistor II is connected to the DSG pin of the battery management chip through a resistor VI, the drain electrode of the MOS transistor II is connected to the drain electrode of the MOS transistor I, the source electrode of the MOS transistor II is grounded through the resistor VII, the capacitor IV and the resistor VII are connected in parallel, one end of the capacitor IV is connected to one end of the resistor VIII, the other end of the capacitor IV is connected to one end of a resistor IX, the other end of the resistor VIII is connected to the SRN pin of the battery management chip and one end of the capacitor V respectively, the other end of the resistor IX is connected to the SRP pin of the battery management chip and one end of the capacitor VI respectively, and the other end of the capacitor V is connected with the other end of the capacitor VI in series.
Preferably, the battery management chip is a BQ76940 type battery management chip.
In order to realize filtering, the REGOUT pin of the battery management chip is grounded through a capacitor ii, and the CAP1 pin of the battery management chip is grounded through a capacitor iii.
The utility model has the beneficial effects that: the NTC thermistor is connected through the interface, and the collection of temperature data of the battery pack can be realized. The capacitor I plays a role in filtering, the resistor III and the resistor IV are pull-up resistors, the resistor V is a pull-up resistor, the battery management chip controls the on-off of the MOS transistor I, the resistor VI is a current-limiting resistor, the battery management chip controls the on-off of the MOS transistor II, the resistor VII is a sampling resistor, and the resistor VIII, the capacitor IV, the capacitor V, the capacitor VI and the resistor IX form an RC filter circuit. The SRN pin of the battery management chip is connected with the resistor VIII and used for collecting voltage difference between two ends of the resistor VII, so that charging and discharging current is obtained, detection of the charging and discharging current of the BMS battery management system is realized, and safety of the BMS battery management system is improved.
Drawings
FIG. 1 is a circuit block diagram of the present invention;
in the figure, 1, a battery management chip 2, a battery pack interface 3, a power interface 4, a resistor I5, a resistor II 6, a capacitor I7, a capacitor II 8, a capacitor III 9, a resistor III 10, a resistor IV 11, a MOS transistor I12, a resistor V13, a MOS transistor II 14, a resistor VI 15, a resistor VII 16, a resistor VIII 17, a capacitor IV 18, a capacitor V19, a capacitor VI 20, a resistor IX 21 and an interface are arranged.
Detailed Description
The utility model is further described below with reference to fig. 1.
A BMS battery management system charge and discharge circuit based on battery management chip includes: the battery management chip 1 is characterized in that a VC15 pin of the battery management chip 1 is connected to one end of a resistor I4, the other end of the resistor I4 is respectively connected to a power supply, a 16 pin of a battery pack interface 2 and a VIN pin of a power supply interface 3, a VC0 pin of the battery management chip is connected to a 1 pin of the battery pack interface 2 through a resistor II 5, a CAP2 pin of the battery management chip is connected to a VC5X pin through a capacitor I6, a TS2 pin and a VC5X pin of the battery management chip are connected to an interface 21 for connecting an NTC thermistor, a VSS pin of the battery management chip is grounded, an SCL pin of the battery management chip is connected to a 3.3V power supply through a resistor III 9, and an SDA pin of the battery management chip is connected to a 3.3V power supply through a resistor IV 10; a gate of the MOS transistor i 11 is connected to the CHG pin of the battery management chip 1 via a resistor v 12, and a source thereof is connected to the GND pin of the power interface 3; the grid electrode of the MOS tube II 13 is connected to the DSG pin of the battery management chip 1 through a resistor VI 14, the drain electrode of the MOS tube II is connected to the drain electrode of the MOS tube I11, the source electrode of the MOS tube II is grounded through a resistor VII 15, a capacitor IV 17 and the resistor VII 15 are connected in parallel, one end of the capacitor IV 17 is connected to one end of a resistor VIII 16, the other end of the capacitor IV 17 is connected to one end of a resistor IX 20, the other end of the resistor VIII 16 is respectively connected to the SRN pin of the battery management chip 1 and one end of a capacitor V18, the other end of the resistor IX 20 is respectively connected to the SRP pin of the battery management chip 1 and one end of a capacitor VI 19, and the other end of the capacitor V18 is connected with the other end of the capacitor VI 19 in series. Battery pack interface 2 can connect 15 lithium cell series batteries, battery pack interface 2's 1 foot is the total negative pole of group battery, is connected with battery management chip 1's VCO pin through resistance II 5, resistance II 5 plays the current-limiting effect, battery pack interface 2's 16 feet is the total positive pole of group battery, connect in battery management chip 1's VC15 pin through resistance I4, realize the group battery total voltage and detect, resistance I4 plays the current-limiting effect. The collection of battery pack temperature data can be achieved by connecting the NTC thermistors in the BMS battery management system through the interface 21. The capacitor I6 plays a role in filtering, the resistor III 9 and the resistor IV 10 are pull-up resistors, the resistor V12 is a pull-up resistor, the battery management chip 1 controls the on-off of the MOS transistor I11, the resistor VI 14 is a current-limiting resistor, the battery management chip 1 controls the on-off of the MOS transistor II 13, the resistor VII 15 is a sampling resistor, and the resistor VIII 16, the capacitor IV 17, the capacitor V18, the capacitor VI 19 and the resistor IX 20 form an RC filter circuit. The SRN pin of the battery management chip 1 is connected with the resistor VIII 16 and used for collecting voltage difference between two ends of the resistor VII 15, so that charging and discharging current is obtained, detection of the charging and discharging current of the BMS battery management system is realized, and safety of the BMS battery management system is improved.
Preferably, the battery management chip 1 is a BQ76940 type battery management chip.
The REGOUT pin of the battery management chip 1 is grounded through a capacitor II 7, and the CAP1 pin of the battery management chip 1 is grounded through a capacitor III 8. And the capacitor II 7 and the capacitor III 8 both have filtering functions.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A BMS battery management system charge-discharge circuit based on battery management chip, characterized by includes:
the battery management chip (1) is characterized in that a VC15 pin of the battery management chip is connected to one end of a resistor I (4), the other end of the resistor I (4) is respectively connected to a power supply, a 16 pin of a battery pack interface (2) and a VIN pin of a power supply interface (3), a VC0 pin of the battery management chip is connected to the 1 pin of the battery pack interface (2) through a resistor II (5), a CAP2 pin of the battery management chip is connected to a VC5X pin through a capacitor I (6), a TS2 pin and a VC5X pin of the battery management chip are connected to an interface (21) for connecting an NTC thermistor, a VSS pin of the battery management chip is grounded, an SCL pin of the battery management chip is connected to a 3.3V power supply through a resistor III (9), and an SDA pin of the battery management chip is connected to the 3.3V power supply through a resistor IV (10);
the grid of the MOS tube I (11) is connected to the CHG pin of the battery management chip (1) through a resistor V (12), and the source of the MOS tube I is connected to the GND pin of the power interface (3);
the grid electrode of the MOS transistor II (13) is connected to the DSG pin of the battery management chip (1) through a resistor VI (14), the drain electrode of the MOS transistor II is connected to the drain electrode of the MOS transistor I (11), the source electrode of the MOS transistor II is grounded through a resistor VII (15), a capacitor IV (17) and the resistor VII (15) are connected in parallel, one end of the capacitor IV (17) is connected to one end of a resistor VIII (16), the other end of the capacitor IV (17) is connected to one end of a resistor IX (20), the other end of the resistor VIII (16) is connected to the SRN pin of the battery management chip (1) and one end of a capacitor V (18) respectively, the other end of the resistor IX (20) is connected to the SRP pin of the battery management chip (1) and one end of a capacitor VI (19) respectively, and the other end of the capacitor V (18) is connected with the other end of the capacitor VI (19) in series.
2. The battery management chip-based BMS battery management system charging and discharging circuit of claim 1, wherein: the battery management chip (1) is a BQ76940 type battery management chip.
3. The battery management chip-based BMS battery management system charging and discharging circuit of claim 1, wherein: the REGOUT pin of the battery management chip (1) is grounded through a capacitor II (7), and the CAP1 pin of the battery management chip (1) is grounded through a capacitor III (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122168250.4U CN215817612U (en) | 2021-09-09 | 2021-09-09 | BMS battery management system charge-discharge circuit based on battery management chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122168250.4U CN215817612U (en) | 2021-09-09 | 2021-09-09 | BMS battery management system charge-discharge circuit based on battery management chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215817612U true CN215817612U (en) | 2022-02-11 |
Family
ID=80159029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122168250.4U Active CN215817612U (en) | 2021-09-09 | 2021-09-09 | BMS battery management system charge-discharge circuit based on battery management chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215817612U (en) |
-
2021
- 2021-09-09 CN CN202122168250.4U patent/CN215817612U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103633693B (en) | A kind of battery balanced management system | |
| CN103715737A (en) | Lithium battery charging/ discharging management system | |
| CN103208828A (en) | Management system for serial connected battery packs | |
| CN108508365B (en) | Lithium ion battery self-discharge screening method | |
| CN109530275A (en) | Retired battery sorting method and system | |
| CN205407331U (en) | Group battery intelligent management system suitable for new forms of energy car | |
| CN103293481A (en) | Lithium ion battery self-discharging quick detecting method | |
| CN204287442U (en) | Circuit is eliminated in a kind of electric energy meter pond passivation detection and passivation | |
| CN102082312A (en) | High-capacity energy storage device | |
| CN203632319U (en) | Lithium battery charging/discharging management system | |
| CN208547706U (en) | A kind of rechargeable battery charging and discharging currents detection circuit and the electric appliance using rechargeable battery | |
| CN107192965A (en) | A kind of dc source aging testing system and its method | |
| CN205195249U (en) | Digit BMS protection shield with data storage function | |
| CN215817612U (en) | BMS battery management system charge-discharge circuit based on battery management chip | |
| CN103633705A (en) | Terminal and method of precisely acquiring battery voltage by discharging during charging | |
| TW201803242A (en) | Battery internal resistance detection device with electricity recharge, and application method thereof capable of recovering energy consumed during battery internal resistance measurement | |
| CN108054450A (en) | A kind of lithium battery management system | |
| CN106394305A (en) | Electromobile battery pack capable of being quickly charged and quickly-charging method thereof | |
| CN203434650U (en) | Battery management device | |
| CN206742911U (en) | One kind is based on metal-oxide-semiconductor battery adaptive charge and discharge device in parallel | |
| CN206471812U (en) | A kind of battery pack protection circuit | |
| CN203984060U (en) | Large current balance type power-supply management system | |
| CN203722293U (en) | Cell management apparatus carrying out management on cell charging and discharging | |
| CN211653083U (en) | Double-chip cascade acquisition circuit | |
| CN204330989U (en) | A kind of accumulator overload performance pick-up unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |