CN211183448U - Lithium battery management system - Google Patents
Lithium battery management system Download PDFInfo
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- CN211183448U CN211183448U CN201921762342.1U CN201921762342U CN211183448U CN 211183448 U CN211183448 U CN 211183448U CN 201921762342 U CN201921762342 U CN 201921762342U CN 211183448 U CN211183448 U CN 211183448U
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Abstract
The utility model discloses a lithium battery management system, include: a lithium battery module including a plurality of lithium battery packs BiThe lithium battery pack BiThe sensor is connected with a microprocessor, the microprocessor is respectively connected with a communication unit, a storage unit and a fault diagnosis unit, and the fault diagnosis unit is connected with each lithium battery pack BiA power switch is arranged between the lithium battery module and the monitoring module, the output end of the monitoring module is respectively connected with the input end of the overcharge protection unit and the overdischarge protection unitThe input end of the protection unit is connected with the input end of the overcurrent protection unit. It can self-checking lithium cell group trouble itself, can also effectually carry out overcharge protection, overdischarge protection and overcurrent protection to lithium cell group, can realize that the user conveniently looks over the operating condition of lithium cell simultaneously.
Description
Technical Field
The utility model relates to a management system, concretely relates to lithium battery management system.
Background
Along with the development of science and technology, people pay more and more attention to environment-friendly clean energy, and the lithium battery has the advantages of light weight, long service life, strong adaptability to high and low temperatures and environmental protection as an energy storage medium.
The lithium battery management system is an important component of a power battery system of an electric vehicle and is mainly used for monitoring and protecting the reliable operation of a lithium battery pack.
The lithium battery has large capacity, a large number of serial-parallel connection sections and a complex system, and the problems of electrolyte leakage, electric leakage, collision and the like easily occur in the using process, and in addition, the conditions of overcharge, overdischarge and overcurrent easily occur in the charging and discharging processes, so the working life of the lithium battery is influenced slightly, and safety accidents are caused seriously.
Therefore, developing a lithium battery management system that can timely protect the lithium battery pack and realize that a user conveniently checks the working state of the lithium battery is important in promoting the development of the power battery system of the electric vehicle.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a lithium battery management system, it can self-checking lithium cell group own trouble, can also effectually organize to lithium cell and carry out overcharge protection, overdischarge protection and overcurrent protection, realizes the user and conveniently looks over the operating condition of lithium cell simultaneously.
In order to solve the technical problem, the utility model provides a lithium battery management system, include: a lithium battery module including a plurality of lithium battery packs BiThe lithium battery pack BiThe sensor is connected with a microprocessor, the microprocessor is respectively connected with a communication unit, a storage unit and a fault diagnosis unit, and the fault diagnosis unit is connected with each lithium battery pack BiA power switch is arranged between the lithium battery module and the monitoring module, the output end of the monitoring module is respectively connected with the input end of the overcharge protection unit, the input end of the overdischarge protection unit and the input end of the overcurrent protection unit, and the output end of the overcharge protection unitThe terminal, the output end of the over-discharge protection unit and the output end of the over-current protection unit are connected with the input end of an IC control module, the IC control module is connected with a display module, the display module is connected with the client, and the monitoring module is connected with the MCU.
Preferably, the lithium battery management system is characterized in that the monitoring module comprises a voltage detection circuit module, a current detection circuit module and a temperature information monitoring circuit module.
Preferably, the lithium battery management system is characterized in that the voltage detection circuit module is used for detecting the output voltage of the lithium battery module, the current detection circuit module is used for detecting the maximum discharge current of the lithium battery module, and the temperature information monitoring circuit module is used for detecting the working temperature of the lithium battery module.
Preferably, the lithium battery management system is characterized in that the overcharge protection unit is started immediately after the output voltage is higher than the voltage set value by 5s, the overdischarge protection unit is started immediately when the output voltage is lower than the voltage set value, the overcurrent protection unit is started immediately when the maximum discharge current is higher than the current set value, and the overcharge protection unit and the overdischarge protection unit are started immediately after the operating temperature exceeds the temperature set value.
Preferably, the lithium battery management system is characterized in that the IC control module includes a discharge control mosfet unit and a charge control mosfet unit.
Preferably, the lithium battery management system is characterized in that the overcharge protection unit is configured to turn off the charge control mosfet d unit, the overdischarge protection unit is configured to turn off the discharge control mosfet d unit, and the overcurrent protection unit is configured to turn off the discharge control mosfet d unit.
Preferably, the lithium battery management system is characterized in that the display module displays the lithium battery pack B by using a liquid crystal displayiAnd fault indications.
Preferably, the lithium battery management system is characterized in that the display module transmits the displayed content to the client through bluetooth.
Preferably, the lithium battery management system is characterized in that the MCU is connected to a PC terminal, and the PC terminal is used for setting parameters in the lithium battery management system.
Preferably, the lithium battery management system is characterized in that the sensor is one or more of an insulation sensor, a collision sensor, a smoke sensor, an inclination sensor and an acceleration sensor.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a plurality of lithium cell group B to in the lithium cell moduleiSelf-checking, eliminating possible electrolyte leakage, battery collision, electric leakage and other phenomena, judging the failed battery pack through the fault diagnosis unit, and then disconnecting the corresponding power switch to prevent the failed lithium battery pack BiAnd is connected with the monitoring module.
2. The utility model provides a lithium cell module with the monitoring module is connected, the monitoring module can in time acquire lithium cell group BiWhen the monitoring module detects that the voltage value in the lithium battery module is higher than a voltage set value, the overcharge protection unit is started, the overcharge protection unit closes a charge-controlled MOSFET (metal-oxide-semiconductor field effect transistor) unit, and a charge loop is closed; when the voltage value is lower than the voltage set value, the over-discharge protection unit is started, and the over-discharge protection unit closes the MOSFET unit for discharge control and closes the discharge loop; when the maximum discharge current is higher than the current set value, the discharge control MOSFET unit is closed, the discharge loop is closed, and meanwhile, the display module displays fault information, so that the professional can conveniently process the fault information in time.
3. The utility model discloses a self-checking lithium cell group BiThe self fault is processed in time, and the failed lithium battery pack B is processediLithium battery pack B without failureiGo further toThe safety protection method has the advantages that overcharge protection, overdischarge protection and overcurrent protection are carried out step by step, the safety of the power battery system of the electric vehicle is greatly improved in a mode of self-checking and protection, meanwhile, the probability of occurrence of major accidents is reduced, and manpower and material resources are saved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and 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 block diagram of the self-checking system of the present invention;
fig. 2 is a system block diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.
Examples
Referring to fig. 1 and 2, the utility model discloses a lithium battery management system, include: a lithium battery module including multiple lithium battery groups BiThe lithium battery pack BiA sensor is connected with a microprocessor which is respectively connected with a communication unit, a storage unit and a fault diagnosis unit, and the fault diagnosis unit is connected with each lithium battery pack BiA power switch is arranged between the lithium battery module and the monitoring module, the output end of the monitoring module is respectively connected with the input end of the overcharge protection unit, the input end of the overdischarge protection unit and the input end of the overcurrent protection unit,the output end of the overcharge protection unit, the output end of the overdischarge protection unit and the output end of the overcurrent protection unit are connected with the input end of an IC control module, the IC control module is connected with a display module, the display module is connected with a client, and the monitoring module is connected with an MCU.
The sensor is one or more of an insulation sensor, a collision sensor, a smoke sensor, an inclination angle sensor and an acceleration sensor.
The information of the lithium battery module is monitored by the monitoring module.
The monitoring module comprises a voltage detection circuit module, a current detection circuit module and a temperature information monitoring circuit module, wherein the voltage detection circuit module is used for detecting the output voltage of the lithium battery module, the current detection circuit module is used for detecting the maximum discharge current of the lithium battery module, the temperature information monitoring circuit module is used for detecting the working temperature of the lithium battery module, the overcharge protection unit is started immediately after the output voltage is higher than a voltage set value by 5s, the overdischarge protection unit is started immediately when the output voltage is lower than the set value, the overcurrent protection unit is started immediately when the maximum discharge current is higher than a current set value, and the overcharge protection unit and the overdischarge protection unit are started immediately after the working temperature is higher than a temperature set value.
Wherein the IC control module includes a discharge control mosfet d unit and a charge control mosfet d unit, and the charge control mosfet d unit is turned off immediately after the overcharge protection unit is turned on, and the discharge control mosfet d unit is turned off immediately after the overdischarge protection unit is turned on.
Wherein, the display module adopts a liquid crystal screen to display the lithium battery pack BiAnd a fault indication; when the charging control MOSFET unit is closed, the charging loop is cut off, and charging is stopped; after the discharge control MOSFET unit is closed, a discharge loop is cut off, and discharge is stopped; at the moment, the liquid crystal display can display obvious fault indication, and the maintenance and the treatment of professionals are facilitated.
Wherein, the fault indication that above-mentioned display module will show is passed through the bluetooth and is transmitted to the customer end, and convenience of customers in time knows lithium cell group BiAnd can be stored at the client end to be used as a sample for later statistical analysis.
The MCU is connected with a PC end, the PC end is used for setting parameters in a lithium battery management system, and the parameters comprise the output voltage, the maximum discharge current and the working temperature.
The actual working process is as follows:
the power switch is in a closed state, and the sensor is used for charging the lithium battery pack BiDetecting whether electrolyte leakage, electric leakage, collision and the like occur, and analyzing and processing the lithium battery pack B through the microprocessor if the electrolyte leakage, the electric leakage, the collision and the like occuriOn one hand, the fault information is informed to the professional through the communication unit and is processed in time, and meanwhile, the fault information is stored, and on the other hand, the fault diagnosis unit is used for storing the lithium battery pack B with faultsiDiagnosing and cutting off the corresponding failed lithium battery BiA power switch. Lithium battery pack B without faultsiOvercharge protection, overdischarge protection, and overcurrent protection are further performed.
The utility model discloses a first self-checking gets rid of lithium cell group BiLithium battery B that may appear iniThe self faults can reduce the probability of occurrence of major accidents when overcharge protection, overdischarge protection and overcurrent protection are carried out, the safety is improved, and manpower and material resources are saved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A lithium battery management system, comprising: a lithium battery module including a plurality of lithium battery packs BiThe lithium battery pack BiThe sensor is connected with a microprocessor, the microprocessor is respectively connected with a communication unit, a storage unit and a fault diagnosis unit, and the fault diagnosis unit is connected with each lithium battery pack BiThe monitoring module is connected with the input end of the overcharge protection unit, the input end of the overdischarge protection unit and the input end of the overcurrent protection unit respectively, the output end of the overcharge protection unit, the output end of the overdischarge protection unit and the output end of the overcurrent protection unit are connected with the input end of the IC control module, the IC control module is connected with the display module, the display module is connected with the client, and the monitoring module is connected with the MCU.
2. The lithium battery management system of claim 1, wherein the monitoring module comprises a voltage detection circuit module, a current detection circuit module, and a temperature information monitoring circuit module.
3. The lithium battery management system as claimed in claim 2, wherein the voltage detection circuit module is configured to detect an output voltage of the lithium battery module, the current detection circuit module is configured to detect a maximum discharge current of the lithium battery module, and the temperature information monitoring circuit module is configured to detect an operating temperature of the lithium battery module.
4. The lithium battery management system as claimed in claim 3, wherein the overcharge protection unit is immediately activated when the output voltage is higher than the voltage set value by 5s, the overdischarge protection unit is immediately activated when the output voltage is lower than the voltage set value, the overcurrent protection unit is immediately activated when the maximum discharge current is higher than the current set value, and the overcharge and overdischarge protection units are immediately activated when the operating temperature exceeds the temperature set value.
5. The lithium battery management system of claim 1, wherein the IC control module includes a discharge control mosfet d unit and a charge control mosfet d unit.
6. The lithium battery management system of claim 5, wherein the overcharge protection unit is to turn off the charge control mosfet d cell, the overdischarge protection unit is to turn off the discharge control mosfet d cell, and the overcurrent protection unit is to turn off the discharge control mosfet d cell.
7. The lithium battery management system as claimed in claim 1, wherein the display module displays the lithium battery pack B using a liquid crystal screeniAnd fault indications.
8. The lithium battery management system of claim 7, wherein the display module transmits the displayed content to the client via bluetooth.
9. The lithium battery management system of claim 1, wherein the MCU is connected to a PC terminal, and the PC terminal is used for setting parameters in the lithium battery management system.
10. The lithium battery management system of claim 1, wherein the sensor is one or more of an insulation sensor, a crash sensor, a smoke sensor, a tilt sensor, and an acceleration sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762342.1U CN211183448U (en) | 2019-10-21 | 2019-10-21 | Lithium battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762342.1U CN211183448U (en) | 2019-10-21 | 2019-10-21 | Lithium battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211183448U true CN211183448U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921762342.1U Active CN211183448U (en) | 2019-10-21 | 2019-10-21 | Lithium battery management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211183448U (en) |
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2019
- 2019-10-21 CN CN201921762342.1U patent/CN211183448U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A lithium battery management system Effective date of registration: 20220629 Granted publication date: 20200804 Pledgee: Bank of Suzhou Co.,Ltd. Wujiang sub branch Pledgor: SUZHOU HUAQIAN SHIDAI NEW ENERGY TECHNOLOGY Co.,Ltd. Registration number: Y2022320010308 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |