CN208316322U - Battery protection system and its battery protecting plate - Google Patents
Battery protection system and its battery protecting plate Download PDFInfo
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- CN208316322U CN208316322U CN201820427617.5U CN201820427617U CN208316322U CN 208316322 U CN208316322 U CN 208316322U CN 201820427617 U CN201820427617 U CN 201820427617U CN 208316322 U CN208316322 U CN 208316322U
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Abstract
The utility model provides a kind of battery protection system and its battery protecting plate, battery protection system includes: battery pack, the charge-discharge control unit and high precision sampling resistance being connected on battery set charge/discharge major loop, the battery management chip in parallel with battery pack, the temperature sampling circuit being connect with battery management chip, the high speed microprocessor being connect with battery management chip, the communication interface being connect with high speed microprocessor, the grid of two mos pipes of charge-discharge control unit is connect with battery management chip, the two sides of battery management chip connection high precision sampling resistance, the voltage of battery management chip acquisition battery pack, electric current and temperature, the signal that battery management chip acquires handle and be sent to the information for the battery pack that processing obtains by communication interface the controller of external connection by high speed microprocessor, to user or Equipment can obtain the information of battery pack in real time, and carry out reasonable management according to information is obtained, and improve safety and efficiency that battery pack utilizes.
Description
Technical field
The utility model belongs to battery protection technical field, and in particular to a kind of battery protection system and its battery protection
Plate.
Background technique
Battery protecting circuit is in order to avoid battery because overcharge, overdischarge, electric current is excessive leads to shorter battery life
Or battery is damaged and a kind of circuit for designing.
Although having existed some patents for battery protecting circuit, lithium battery protection board currently on the market
Have a single function, parameter is fixed, the information of battery cannot be obtained, in actual use can not flexibly according to the composition of battery pack and
The setting and matching of state progress parameter.
Utility model content
The utility model is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide one kind can obtain battery letter
Breath, and the battery protection system and its battery protecting plate that battery is managed according to the battery information of acquisition.
The utility model provides a kind of battery protection system characterized by comprising battery pack；
Charge-discharge control unit, the battery pack is external to be output and input for controlling, and is connected to the battery pack pair
On the major loop output and input outside, the charge-discharge control unit includes two concatenated field effect transistors, described two
The parasitic diode differential concatenation of field effect transistor connects；
Battery management chip, it is in parallel with the battery pack for acquiring the voltage, electric current, temperature of the battery pack；
High precision sampling resistance, the electric current on major loop for detecting the battery pack, is connected to the battery pack pair
On the major loop output and input outside；
Temperature sampling circuit acquires the temperature of each sampled point in battery pack, connect with the battery management chip；
High speed microprocessor is connect with the battery pack, electric energy is provided by the battery pack, with the battery management chip
Connection, voltage, electric current, temperature for being acquired according to the battery management chip calculate the remaining of the battery pack in real time to be held
Amount, judges battery health degree according to the residual capacity of the charge and discharge number and the battery pack of statistics in use, according to
Maximum charging and discharging capabilities, the tolerance of power device, the real time temperature of the battery pack and the real-time voltage of battery pack obtain in real time
Power, and according to preset charging over-voltage voltage, preset charging current value, the preset under-voltage electricity of electric discharge
Pressure, preset discharge current, predetermined temperature value control the conducting of two field effect transistors and disconnect from
And realize that charging over-voltage, charging overcurrent, electric discharge is under-voltage, electric discharge overcurrent, charge and discharge overheat protector；And
Communication interface is connect with the high speed microprocessor, for being communicated with peripheral control unit,
Wherein, the battery management chip is connect with the grid of two field effect transistors, the battery management core
On the major loop that the battery pack that piece is connected to the high precision sampling resistance two sides is externally output and input.
Further, it in battery protection system provided by the utility model, can also have the following features: wherein, institute
State the lithium battery that battery pack is multi-section serial.
Further, it in battery protection system provided by the utility model, can also have the following features: wherein, electricity
It further includes battery balanced module that system is protected in pond, is connect with the battery pack, including multiple battery equalizing circuits, every batteries are equal
Connect a battery equalizing circuit, in each battery equalizing circuit comprising a switch in parallel with battery and with
The concatenated resistance of switch, the switch and the resistance are connect with the battery management chip.
Further, it in battery protection system provided by the utility model, can also have the following features: wherein, institute
It states and is provided with fuse on the major loop that battery pack is externally output and input.
Further, it in battery protection system provided by the utility model, can also have the following features: wherein, institute
Stating communication interface is CAN or RS232 or RS485 or I2C.
The utility model additionally provides a kind of battery protecting plate characterized by comprising above-mentioned battery protection system,
And circuit substrate, the battery protection system are integrated on the circuit substrate.
The advantages of the utility model, is as follows:
The battery protection system according to involved in the utility model, battery management chip acquire the electric current of battery pack, voltage,
Temperature, battery management chip are connect with high speed microprocessor, and the major loop of battery set charge/discharge is arranged in charge-discharge control unit
It above and with battery management chip connect, the information of the battery pack of acquisition is sent to high speed microprocessor by battery management chip, high
Fast microprocessor will be protected battery pack according to preset parameter after the information processing of battery pack, high speed microprocessor
It is connect with communication interface, therefore, high speed microprocessor can be by the voltage of battery pack, electric current, temperature, remaining capacity, failure shape
The information such as state are sent to the controller of external connection by communication interface, by the controller of external connection, user or equipment
The information of battery pack can be obtained in real time, and is reasonably managed according to the information of the battery pack of acquisition, and battery pack is improved
The safety and efficiency utilized, and the characteristic of battery pack can be studied, and according to battery according to the information of the battery pack of acquisition
The setting of each parameter in the characteristic change high speed microprocessor of group, such as setting charging over-voltage voltage, charging current value, electric discharge is under-voltage
The flexible setting of parameter can be realized without changing hardware circuit in the parameters such as voltage, discharge current, temperature value.
Detailed description of the invention
Fig. 1 is the circuit diagram of battery protection system in the utility model；
Fig. 2 is the circuit diagram of battery balanced module in the utility model；
Fig. 3 is the structure chart of battery protecting plate in the utility model.
Specific embodiment
In order to be easy to understand the technical means, creative features, achievement of purpose, and effectiveness of the utility model, with
Lower embodiment combination attached drawing is specifically addressed the utility model battery protection system and its battery protecting plate.
Embodiment one
In the present embodiment, as shown in Figure 1, battery protection system 100 include battery pack 10, charge-discharge control unit 20,
Battery management chip 30, high precision sampling resistance 40, temperature sampling circuit 50, high speed microprocessor 60 and communication interface 70.
In the present embodiment, battery pack 10 is the lithium battery that 6~16 strings are connected in series.
In the present embodiment, battery pack 10 is also connected with battery balanced module 90, as shown in Fig. 2, battery balanced module 90
Comprising multiple battery equalizing circuits 91, every batteries in battery pack 10 are all connected with a battery equalizing circuit 91, each battery
The switch 911 comprising one and battery parallel connection of equalizing circuit 91 and with the concatenated resistance 912 of switch 911, switch 911 and resistance
912 are connected on battery management chip 30, and battery management chip 30 manages the opening of the switch 911 of each battery equalizing circuit 91
And closure realizes the equilibrium of battery to adjust the voltage of each battery.
By taking battery 1 as an example, when 1 voltage of battery that battery management chip 30 detects is higher than other cell voltages,
High speed microprocessor 60 is sent the signal to, signal issues high speed microprocessor 60 to battery management chip 30 based on the received
Signal is controlled, battery management chip 30 is according to the switch 911 in control signal conduction Fig. 2, so that in the pole G of N-MOSFETQ1
Voltage is generated between the pole S, so that the discharge loop of N-MOSFETQ1 and discharge resistance Rb1 composition be connected, battery is put
Electricity realizes the equilibrium of voltage.
For controlling, battery pack 10 is external to be output and input charge-discharge control unit 20.As shown in Figure 1, charge and discharge is automatically controlled
Unit 20 processed is connected on the major loop that battery pack 10 is externally output and input.Charge-discharge control unit 20 includes two concatenated
The parasitic diode differential concatenation of field effect transistor 21 and 22, two field effect transistors 21 and 22 connects, field effect transistor
Pipe 21 is charging metal-oxide-semiconductor, and field effect transistor 22 is electric discharge metal-oxide-semiconductor.
It is as follows that charge-discharge control unit 20 controls the external function of outputting and inputting realization of battery pack 10: charging metal-oxide-semiconductor
When simultaneously turning on electric discharge metal-oxide-semiconductor, battery pack can be normally carried out charging and discharging.When charging metal-oxide-semiconductor disconnects, discharge metal-oxide-semiconductor
The function of forbidding charging may be implemented at this time, prevent from being overcharged by battery pack for conducting.When charging metal-oxide-semiconductor conducting, discharge MOS
It disconnects, the function of forbidding electric discharge may be implemented at this time, battery is prevented to be excessively discharged.When charging metal-oxide-semiconductor and electric discharge metal-oxide-semiconductor are same
When disconnect, forbid battery to be charged and discharged simultaneously at this time, when inside has device failure or battery life to terminate, can pass through
This movement is to terminate battery.
High precision sampling resistance 40 is used to detect the electric current on the major loop of battery pack 10, and it is externally defeated to be connected to battery pack 10
Enter and the major loop that exports on.
Temperature sampling circuit 50 (NTC) is used to acquire the temperature of each sampled point in battery pack 10, with battery management chip 30
Connection.Sampled point is separately positioned on the different places of battery pack 10, and the setting of sampled point makes it possible to obtain the every of battery pack 10
The temperature of a part, for acquiring the temperature of battery pack 10 everywhere.
Battery management chip 30 is used to acquire the voltage, electric current, temperature of battery pack 10.As shown in Figure 1, battery management core
Piece 30 is in parallel with battery pack 10, and battery management chip 30 is connect with the grid of two field effect transistors 21 and 22, battery management
On the major loop that the battery pack that chip 30 is connected to 40 two sides of high precision sampling resistance is externally output and input.In the present embodiment
In, battery management chip 30 uses the specialized lithium battery management chip AN49503A of Panasonic.
Battery management chip 30 is in parallel with battery pack 10, so as to collect the voltage at 10 both ends of battery pack, cell tube
On the major loop that the battery pack that reason chip 30 is connected to 40 two sides of high precision sampling resistance is externally output and input, so as to standard
The total current for flowing through battery pack 10 is really read, the temperature of each sampled point is read by temperature sampling circuit 50.
Voltage, electric current, temperature of the high speed microprocessor 60 for being acquired according to battery management chip 30 calculate battery in real time
The residual capacity of group 10, judges battery health according to the residual capacity of the charge and discharge number and battery pack of statistics in use
Degree, obtains reality according to the maximum charging and discharging capabilities of battery pack, the tolerance of power device, the real time temperature of battery pack and real-time voltage
When power, and according to preset charging over-voltage voltage, preset charging current value, the under-voltage electricity of preset electric discharge
Pressure, preset discharge current, predetermined temperature value control charging metal-oxide-semiconductor 21 and the metal-oxide-semiconductor 22 that discharges lead on and off
It opens to realize that charging over-voltage, charging overcurrent, electric discharge is under-voltage, electric discharge overcurrent, charge and discharge overheat protector.
High speed microprocessor 60 reads voltage, electric current and the temperature of battery pack 10 in real time, by current integration and according to making
The charge-discharge characteristic adjusting parameter of battery pack at different temperature, calculates the residual capacity of battery.By calculating battery
The residual capacity of the charge and discharge number and battery pack of group in use, to determine the health degree of battery pack.In conjunction with electricity
The maximum charging and discharging capabilities of pond group, the tolerance of power device and the real time temperature of current battery and voltage provide a reality
When maximum charge or discharge power, according to this realtime power, intelligent charger or electrical equipment, it is adjustable in real time
Power, efficiency for charge-discharge prevent BMS from protecting.
High speed microprocessor 60 is connect with battery pack 10, provides electric energy by battery pack 10.High speed microprocessor 60 and battery
Managing chip 30 connects, and the information of the voltage of the battery of acquisition, electric current, temperature is sent to the micro- place of high speed by battery management chip 30
Device 60 is managed, high speed microprocessor 60 handles signal, and sends control letter to battery management chip 30 according to processing result
Number, battery management chip 30 controls the conducting and disconnection of charging metal-oxide-semiconductor 21 and the metal-oxide-semiconductor 22 that discharges according to control signal, thus right
Battery pack 10 carry out charging over-voltage, charging overcurrent, electric discharge it is under-voltage, electric discharge overcurrent, charge and discharge overheat protector.In the present embodiment,
High speed microprocessor 60 is single-chip microcontroller.
Battery protection system 100 to battery pack 10 carry out charging over-voltage, charging overcurrent, electric discharge it is under-voltage, electric discharge overcurrent, charge and discharge
The principle of electric overheat protector is as follows:
Charging overvoltage protection: when any cell voltage in battery pack 10 meets or exceeds the preset piezoelectricity that charged
When pressure, high speed microprocessor 60 issues the signal for forbidding charging, 30 basis of battery management chip to battery management chip 30
Signal-off charging metal-oxide-semiconductor, forbids charging, realizes charging overvoltage protection.
Charging overcurrent protection: when electric current meets or exceeds the charging current value of setting, high speed microprocessor in battery pack 10
60 issue the signal for forbidding charging to battery management chip 30, and battery management chip 30 is forbidden according to signal-off charging metal-oxide-semiconductor
Charging overcurrent protection is realized in charging.
Electric discharge under-voltage protection: when any cell voltage in battery pack 10 is at or below the preset under-voltage electricity of electric discharge
When pressure, high speed microprocessor 60 issues the signal for forbidding electric discharge, 30 basis of battery management chip to battery management chip 30
Signal-off electric discharge metal-oxide-semiconductor, forbids discharging, and realizes electric discharge under-voltage protection.
Electric discharge overcurrent protection: when electric current meets or exceeds the discharge current value of setting, high speed microprocessor in battery pack 10
60 issue the signal for forbidding electric discharge to battery management chip 30, and battery management chip 30 is forbidden according to signal-off electric discharge metal-oxide-semiconductor
Electric discharge overcurrent protection is realized in electric discharge.
Overheat protector: when the temperature of battery pack 10 meets or exceeds the temperature value of setting, high speed microprocessor 60 is to battery
Managing chip 30 issues the signal for forbidding electric discharge, and battery management chip 30 is forbidden discharging according to signal-off electric discharge metal-oxide-semiconductor, real
It now discharges overcurrent protection.
Communication interface 70 is connect with high speed microprocessor 60, for communicating with peripheral control unit.High speed microprocessor 60 will
The information such as voltage, electric current, temperature, remaining capacity, the malfunction of the battery being calculated are sent out in real time by communication interface 70
The controller for giving external connection, by the controller of external connection, user or equipment can obtain the information of battery in real time,
And reasonably managed according to the information of the battery of acquisition, such as: it replaces and reports in time when charging in time, battery life termination
It is useless, to improve the reliability and disposal efficiency that battery uses.And battery can be studied according to the information of the battery pack of acquisition
The characteristic of group, and according to the setting of each parameter in the characteristic of battery pack change high speed microprocessor 60, as set the piezoelectricity that charged
The parameters such as pressure, charging current value, electric discharge brownout voltage, discharge current, temperature value, without changing hardware circuit, Ji Keshi
The flexible setting of existing parameter.In the present embodiment, communication interface 70 is CAN or RS232 or RS485 or I2C.Communication interface 70
The controller of external connection can be computer.
In the present embodiment, it is provided with fuse 80 on the major loop that battery pack 10 is externally output and input, in battery pack
When 10 progress charge and discharge, if there is the excessive situation of electric current, fuse 80 fuses, and charge-discharge circuit disconnects, and avoids cell damage.
Embodiment two
As shown in figure 3, battery protecting plate 200 includes: above-mentioned battery protection system 100 and circuit substrate 300, electricity
Pond protection system 100 is integrated on circuit substrate 200.
Above embodiment is the preferred case of the utility model, is not intended to limit the protection scope of the utility model.
Claims (6)
1. a kind of battery protection system characterized by comprising
Battery pack；
Charge-discharge control unit, the battery pack is external to be output and input for controlling, and it is externally defeated to be connected to the battery pack
Enter and the major loop that exports on, the charge-discharge control unit includes two concatenated field effect transistors, described two effects
The parasitic diode differential concatenation of transistor is answered to connect；
Battery management chip, it is in parallel with the battery pack for acquiring the voltage, electric current, temperature of the battery pack；
High precision sampling resistance, the electric current on major loop for detecting the battery pack, it is externally defeated to be connected to the battery pack
Enter and the major loop that exports on；
Temperature sampling circuit acquires the temperature of each sampled point in battery pack, connect with the battery management chip；
High speed microprocessor is connect with the battery pack, is provided electric energy by the battery pack, is connected with the battery management chip
It connecing, the voltage, electric current, temperature for being acquired according to the battery management chip calculate the residual capacity of the battery pack in real time,
Battery health degree is judged according to the residual capacity of the charge and discharge number and the battery pack of statistics in use, according to battery
Maximum charging and discharging capabilities, the tolerance of power device, the real time temperature of the battery pack and the real-time voltage of group obtain realtime power,
And according to preset charging over-voltage voltage, preset charging current value, preset electric discharge brownout voltage, in advance
The discharge current of setting, predetermined temperature value control the conducting of two field effect transistors and disconnect realizing and filling
Electric over-voltage, charging overcurrent, electric discharge is under-voltage, electric discharge overcurrent, charge and discharge overheat protector；And
Communication interface is connect with the high speed microprocessor, for being communicated with peripheral control unit,
Wherein, the battery management chip is connect with the grid of two field effect transistors, and the battery management chip connects
It connects on the major loop that the battery pack in the high precision sampling resistance two sides is externally output and input.
2. battery protection system according to claim 1, it is characterised in that:
Wherein, the battery pack is the lithium battery of multi-section serial.
3. battery protection system according to claim 1, which is characterized in that further include:
Battery balanced module is connect with the battery pack, including multiple battery equalizing circuits, and every batteries are all connected with described in one
Battery equalizing circuit is connected comprising one with the switch of battery parallel connection and with described switch in each battery equalizing circuit
Resistance, it is described switch and the resistance connect with the battery management chip.
4. battery protection system according to claim 1, it is characterised in that:
Wherein, fuse is provided on the major loop that the battery pack is externally output and input.
5. battery protection system according to claim 1, it is characterised in that:
Wherein, the communication interface is CAN or RS232 or RS485 or I2C.
6. a kind of battery protecting plate characterized by comprising battery protection described in any claim in claim 1 to 5
System and circuit substrate, the battery protection system are integrated on the circuit substrate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820427617.5U CN208316322U (en) | 2018-03-28 | 2018-03-28 | Battery protection system and its battery protecting plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820427617.5U CN208316322U (en) | 2018-03-28 | 2018-03-28 | Battery protection system and its battery protecting plate |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110071554A (en) * | 2019-06-01 | 2019-07-30 | 深圳市永航新能源技术有限公司 | A kind of parallel extended structure of battery BMS |
| CN110460128A (en) * | 2019-08-23 | 2019-11-15 | 北京电子工程总体研究所 | A kind of autonomous controllable high-voltage battery set control system |
| CN110571776A (en) * | 2019-07-10 | 2019-12-13 | 上海艾为电子技术股份有限公司 | surge protection circuit |
| WO2021063290A1 (en) * | 2019-09-30 | 2021-04-08 | 深圳市道通科技股份有限公司 | Battery and automotive diagnostic tablet |
| CN113300005A (en) * | 2020-02-21 | 2021-08-24 | Oppo广东移动通信有限公司 | Electric quantity detection device and method and electronic equipment |
| USD929339S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD929336S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD929335S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD929334S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD929337S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD929338S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| CN113703376A (en) * | 2021-10-25 | 2021-11-26 | 深圳达人高科电子有限公司 | Lithium battery protection board and interface driving circuit thereof |
| USD953268S1 (en) | 2019-09-05 | 2022-05-31 | Techtronic Cordless Gp | Electrical interface |
| WO2022237817A1 (en) * | 2021-05-11 | 2022-11-17 | 深圳市道通智能航空技术股份有限公司 | Battery management system |
| USD1012855S1 (en) | 2019-09-05 | 2024-01-30 | Techtronic Cordless Gp | Battery pack |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110071554A (en) * | 2019-06-01 | 2019-07-30 | 深圳市永航新能源技术有限公司 | A kind of parallel extended structure of battery BMS |
| CN110571776A (en) * | 2019-07-10 | 2019-12-13 | 上海艾为电子技术股份有限公司 | surge protection circuit |
| CN110571776B (en) * | 2019-07-10 | 2021-09-14 | 上海艾为电子技术股份有限公司 | Surge protection circuit |
| CN110460128A (en) * | 2019-08-23 | 2019-11-15 | 北京电子工程总体研究所 | A kind of autonomous controllable high-voltage battery set control system |
| USD929335S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD953268S1 (en) | 2019-09-05 | 2022-05-31 | Techtronic Cordless Gp | Electrical interface |
| USD929339S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD929336S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD1013634S1 (en) | 2019-09-05 | 2024-02-06 | Techtronic Cordless Gp | Battery pack |
| USD929334S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD929337S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD929338S1 (en) | 2019-09-05 | 2021-08-31 | Techtronic Cordless Gp | Electrical interface |
| USD1012855S1 (en) | 2019-09-05 | 2024-01-30 | Techtronic Cordless Gp | Battery pack |
| WO2021063290A1 (en) * | 2019-09-30 | 2021-04-08 | 深圳市道通科技股份有限公司 | Battery and automotive diagnostic tablet |
| WO2021164475A1 (en) * | 2020-02-21 | 2021-08-26 | Oppo广东移动通信有限公司 | Electric quantity measuring apparatus and method and electronic device |
| CN113300005A (en) * | 2020-02-21 | 2021-08-24 | Oppo广东移动通信有限公司 | Electric quantity detection device and method and electronic equipment |
| WO2022237817A1 (en) * | 2021-05-11 | 2022-11-17 | 深圳市道通智能航空技术股份有限公司 | Battery management system |
| CN113703376A (en) * | 2021-10-25 | 2021-11-26 | 深圳达人高科电子有限公司 | Lithium battery protection board and interface driving circuit thereof |
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