CN210898565U - Battery management system - Google Patents
Battery management system Download PDFInfo
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- CN210898565U CN210898565U CN201921761904.0U CN201921761904U CN210898565U CN 210898565 U CN210898565 U CN 210898565U CN 201921761904 U CN201921761904 U CN 201921761904U CN 210898565 U CN210898565 U CN 210898565U
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Abstract
The utility model discloses a battery management system relates to a power supply system, has solved lithium cell and has discharged and be close to the problem that can't open the excitation after easily causing the overdischarge to the lower limit value, and its technical scheme main points are: including power supply unit, coupling is in the battery management module of power supply unit still includes: the switching unit is coupled with the power supply unit and outputs a switching signal to switch a loop where the battery management module is located; the protection unit is connected in series with the switching unit and used for limiting the current of the branch where the switching unit is located so as to protect the switching unit; the indicating unit is coupled in battery management module is used for instructing battery management module operating condition, the utility model discloses a battery management system, lithium cell discharge when being close to the lower limit value, power self-closing system ensure that battery management system is in unoperated state completely to satisfy the demand that lithium cell charge opened the system of encouraging.
Description
Technical Field
The utility model relates to a power supply system, in particular to battery management system.
Background
In recent years, with the accelerated breakthrough and wide application of technologies such as mobile internet, big data, sensors and the like, the development of artificial intelligence also enters a brand-new stage, the scale of market industries in various regions breaks through continuously, the intelligent voice technology becomes mature, and the commercialized application is started comprehensively. The core component of the robot is electric energy (battery), most of the robots with service properties in the market adopt lithium batteries, and a battery management system with complete functions is reserved for ensuring the safety and the reliability of the lithium batteries.
When a battery management system consisting of the battery management modules works, the battery management modules still consume certain electric energy (20-30 m battery management system), when the discharge of the lithium battery is close to a lower limit value, the remaining electric quantity is small, and the lithium battery cannot be started after overdischarge is easily caused, so that the normal use of the lithium battery is influenced, and the improvement space is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery management system, when the lithium cell discharges and is close to the lower limit value, ensure that battery management module is in unoperated state completely to satisfy the lithium cell and charge the demand of opening the system of encouraging.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a battery management system includes a power supply unit, a battery management module coupled to the power supply unit, and further includes:
the switching unit is coupled with the power supply unit and outputs a switching signal to switch the on-off of a loop where the battery management module is located;
the protection unit is connected in series with the switching unit and used for limiting the current of the branch where the switching unit is located so as to protect the switching unit;
the indicating unit is coupled with the battery management module and used for indicating the working state of the battery management module;
when the switching unit disconnects a loop where the battery management module is located, the battery management module stops consuming power, and the indicating unit does not work; when the switching unit closes a loop where the battery management module is located, the battery management module continues to consume power to work, and the indicating unit works.
By adopting the technical scheme, the switching unit coupled with the power supply unit switches the loop of the battery management module, when the switching unit closes the loop of the battery management module, the battery management module continues to consume power to work, the switching unit disconnects the loop of the battery management module, the battery management module stops consuming power, when the discharge of the lithium battery is close to the lower limit value, the residual electric quantity is small, the switching unit disconnects the loop of the battery management module to avoid the next situation that the battery management module continues to consume the electric quantity of the lithium battery, so that the battery management module is completely in the non-working state to meet the requirement of a lithium battery charging starting system;
the protection unit is used for limiting the current of the branch where the switching unit is located to avoid burning out the switching unit due to overlarge current flowing through the branch where the switching unit is located;
the indicating unit indicates the working state of the current battery management module, so that working personnel can conveniently know the working condition of the battery management module.
The utility model discloses further set up to: the indicating unit is a light indicator.
By adopting the technical scheme, the indicating unit is used for indicating light, and the indicating unit has no dead zone in indication, has good indicating effect and is convenient for workers to judge the position of the light indication; the two light indications avoid the problem of noise pollution compared with the sound indication.
The utility model discloses further set up to: the indication unit includes:
the light indicating part is coupled with the battery management module and used for indicating the working state of the battery management module, and the light indicating part consists of a light emitting diode;
and the light protection part is connected in series with the light-emitting diode and is used for limiting the current of the branch where the light-emitting diode is located so as to protect the light-emitting diode.
By adopting the technical scheme, the light indicating part consisting of the light emitting diodes works stably, has low power consumption and is more environment-friendly; the light protection part is used for limiting the current of the branch where the light-emitting diode is located, and the problem that the light-emitting diode is burnt due to the fact that the current of the branch where the light-emitting diode is located is too large is avoided.
The utility model discloses further set up to: further comprising:
and the amplifying unit is coupled to the front end of the battery management module and plays an amplifying role in amplifying signals accessed to the front end of the battery management module.
By adopting the technical scheme, the amplifying unit has an amplifying effect on the signal connected to the front end of the battery management module, and the situation that the signal at the front end of the battery management module is too weak in the transmission process to cause the signal to be transmitted to the front end of the battery management module and further drive the battery management module to work is avoided.
The utility model discloses further set up to: the amplifying unit is a power amplifying circuit coupled to the front end of the battery management module.
By adopting the technical scheme, the power amplification circuit has the characteristics of small distortion, low noise, large dynamic range and the like.
The utility model discloses further set up to: the power supply unit includes:
the rectification part is coupled to the commercial power and outputs a rectification signal;
the filtering part is coupled to the rectifying part to receive the rectified signal and output a filtered signal.
By adopting the technical scheme, the rectifying part rectifies the alternating current so as to convert the alternating current into the direct current; the filtering part filters a large amount of higher harmonics to ensure that the power supply unit outputs stable voltage.
The utility model discloses further set up to: the filtering part comprises a first filtering capacitor and a second filtering capacitor which are both coupled to the rectifying part and used for filtering.
By adopting the technical scheme, the C pi type filtering part consisting of the first filtering capacitor and the second filtering capacitor can filter higher harmonics, and the interference of the higher harmonics is avoided.
The utility model discloses further set up to: the power supply unit further includes:
and the voltage stabilizing part is coupled with the rectifying part to receive the rectified signal and play a role in stabilizing the signal.
By adopting the technical scheme, the voltage stabilizing part enables the current output by the power supply unit to be changed in a large range and the voltage to be basically unchanged, and the voltage output by the power supply unit can be clamped to a voltage stabilizing value.
To sum up, the utility model discloses following beneficial effect has:
1. the switching unit switches a loop where the battery management module is located, when the switching unit disconnects the loop where the battery management module is located, the battery management module stops consuming power, when the lithium battery discharges to be close to a lower limit value, the remaining electric quantity is small, the switching unit disconnects the loop where the battery management module is located, the electric quantity of the lithium battery is prevented from being continuously consumed by the battery management module, the battery management module is enabled to be completely in an out-of-operation state, and therefore the requirement of a lithium battery charging excitation starting system is met;
2. the protection unit is used for limiting the current of the branch where the switching unit is located to avoid burning out the switching unit due to overlarge current flowing through the branch where the switching unit is located;
3. the indicating unit indicates the working state of the current battery management module, so that working personnel can conveniently know the working condition of the battery management module.
Drawings
FIG. 1 is a schematic circuit diagram of a power supply unit according to the present embodiment;
fig. 2 is a schematic circuit diagram of the battery management module and the indicating unit in the present embodiment.
In the figure: 1. a power supply unit; 11. a rectifying section; 12. a filtering section; 121. a first filter capacitor; 122. a second filter capacitor; 13. a voltage stabilizing part; 2. a battery management module; 3. a switching unit; 4. a protection unit; 5. an indicating unit; 501. a light indication part; 502. a light protection unit; 6. an amplifying unit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying fig. 1-2.
As shown in fig. 1 and fig. 2, the battery management system disclosed in this embodiment includes a power supply unit 1, a battery management module 2 coupled to the power supply unit 1, a switching unit 3 coupled to the power supply unit 1, a protection unit 4 connected in series to the switching unit 3, and an indication unit 5 coupled to the battery management module 2.
As shown in fig. 1 and 2, the switching unit 3 is coupled to the power supply unit 1 and outputs a switching signal to switch the circuit of the battery management module 2. And the protection unit 4 is connected in series with the switching unit 3 and used for limiting the branch current of the switching unit 3 so as to protect the switching unit 3. The indication unit 5 is coupled to the battery management module 2 for indicating an operation status of the battery management module 2.
As shown in fig. 1, the power supply unit 1 includes a rectifying portion 11 coupled to the utility power and outputting a rectified signal, a voltage stabilizing portion 13 coupled to the rectifying portion 11 and receiving the rectified signal and playing a role of stabilizing the signal, and a filtering portion 12 coupled to the rectifying portion 11 and receiving the rectified signal and outputting a filtered signal.
As shown IN fig. 1, the rectifying unit 11 includes a rectifying diode coupled to the ac power and outputting a rectified signal, the rectifying diode is a diode D1, and the diode D1 is IN 5819. The voltage stabilizing part 13 is a zener diode Z, wherein the model of the zener diode Z is SMBJ 36. The filtering part 12 includes a first filtering capacitor 121 and a second filtering capacitor 122 both coupled to the rectifying part 11 for filtering. The first filter capacitor 121 is a capacitor C1, and the second filter capacitor 122 is a capacitor C2, wherein the value of the capacitor C1 is 220uF, and the value of the capacitor C2 is 104 uF.
As shown in fig. 1, the anode of the diode D1 is connected to the positive terminal of the alternating current BAT, and the cathode of the diode D1 is connected to one end of the zener diode Z, one end of the capacitor C1, and one end of the capacitor C2, respectively; the other end of the zener diode Z, the other end of the capacitor C1 and the other end of the capacitor C2 are all connected to the negative terminal of the alternating current BAT.
As shown in fig. 2, the switching unit 3 is a normally open switch SW, and the protection unit 4 is a resistor R1, wherein the resistance of the resistor R1 is 330K. The normally open switch SW is connected in series with resistor R1.
As shown in fig. 2, the battery management system further includes an amplifying unit 6 coupled to the front end of the battery management module 2 for amplifying a signal accessed to the front end of the battery management module 2, where the amplifying unit 6 is a power amplifying circuit coupled to the front end of the battery management module 2.
As shown in fig. 2, the power amplifying circuit includes a transistor Q1, a transistor Q2, a capacitor C3, a capacitor C4, a resistor R2, a resistor R3, a resistor R4, and a resistor R5. The model of the triode Q1 is MMBT555ILT, and the model of the triode Q2 is MMBT 5401. The value of the capacitor C3 is 105F, the resistance of the resistor R2 is 33K, the resistance of the resistor R3 is 1M, the resistance of the resistor R4 is 1M, and the resistance of the resistor R5 is 309K.
As shown in fig. 2, a base of the transistor Q1 is connected to one end of the resistor R1 and one end of the capacitor C3, respectively, and an emitter of the transistor Q1 is connected to ground AGND. The collector of the triode Q1 is connected with one end of the resistor R2, and the other end of the resistor R2 is respectively connected with one end of the resistor R1 and the base of the triode Q2. An emitter of the transistor Q2 is connected to one end of the capacitor C4 and the other end of the resistor R2, respectively.
As shown in fig. 2, the battery management module 2 includes a chip, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, a diode D2, a resistor R6, a resistor R7, and an inductor L. The chip model is MAX5033DUSA, the value of the capacitor C5 is 105F, the value of the capacitor C6 is 104F, the value of the capacitor C7 is 104F, and the value of the capacitor C8 is 47 uF. The diode D2 is of type IN5819, and the inductor L is of type YKCDRH104R-22 IN. The resistance of the resistor R6 is 33K, and the resistance of the resistor R7 is 11.3K.
As shown in fig. 2, the SGND terminal and the GND terminal of the chip are both connected to ground AGND, the ON/off terminal of the chip is connected to one terminal of a capacitor C5, one terminal of a resistor R4, and one terminal of a resistor R5, respectively, and the other terminal of a capacitor C5 is connected to ground AGND. The VIN terminal of the chip is connected with one end of a capacitor C4, the VD terminal of the chip is connected with one end of a capacitor C7, and the other end of the capacitor C7 is connected with ground AGND. The FB terminal of the chip is connected to one end of the resistor R6 and one end of the resistor R7, respectively. The BST terminal of the chip is connected with one end of the capacitor C6, and the PH terminal of the chip is connected with the other end of the capacitor C6. The anode of the diode D2 is connected to the other end of the capacitor C6 and one end of the inductor L, respectively. The other end of the inductor L is connected to one end of a resistor R6 and one end of a capacitor C8, respectively, the other end of the capacitor C8 is connected to ground AGND, and the other end of the resistor R7 is connected to ground AGND. One end of the capacitor C9 is connected to ground AGND, and the other end of the capacitor C9 is connected to one end of the capacitor C8.
As shown in fig. 2, the indication unit 5 is a light indication. The indicating unit 5 comprises a light indicating part 501 coupled to the battery management module 2 for indicating the working state of the battery management module 2, wherein the light indicating part 501 is composed of a Light Emitting Diode (LED); the indicating unit 5 further includes a light protection portion 502 connected in series to the light emitting diode LED for limiting the current of the branch where the light emitting diode LED is located so as to protect the light emitting diode LED.
As shown in fig. 2, the light protection unit 502 is a resistor R8. The type of the light emitting diode LED is ZX-35288W42-1, the resistance range of the resistor R8 is 330-2000 ohms, and the value is 1000 ohms in the embodiment.
As shown in fig. 2, one end of the resistor R8 is connected to the other end of the capacitor C9, the other end of the resistor R8 is connected to the anode of the light emitting diode LED, and the cathode of the light emitting diode LED is connected to ground AGND.
The working process is as follows:
1. the normally open switch SW is closed, the loop where the battery management module 2 is located is closed, the battery management module 2 continues to consume power to work, and the light emitting diode LED works;
2. the normally open switch SW is disconnected, the loop where the battery management module 2 is located is disconnected, the battery management module 2 stops consuming power, and the light emitting diode LED does not work.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (8)
1. A battery management system comprising a power supply unit (1), a battery management module (2) coupled to the power supply unit (1), characterized by: further comprising:
the switching unit (3) is coupled with the power supply unit (1) and outputs a switching signal to switch the on-off of a loop where the battery management module (2) is located;
the protection unit (4) is connected in series with the switching unit (3) and used for limiting the current of the branch where the switching unit (3) is located so as to protect the switching unit (3);
the indicating unit (5) is coupled with the battery management module (2) and used for indicating the working state of the battery management module (2);
when the switching unit (3) disconnects a loop where the battery management module (2) is located, the battery management module (2) stops consuming power, and the indicating unit (5) does not work; when the switching unit (3) closes a loop where the battery management module (2) is located, the battery management module (2) continues to work with power consumption, and the indicating unit (5) works.
2. A battery management system according to claim 1, wherein: the indicating unit (5) is used for indicating light.
3. A battery management system according to claim 2, wherein: the indication unit (5) comprises:
the light indicating part (501) is coupled to the battery management module (2) and used for indicating the working state of the battery management module (2), and the light indicating part (501) is composed of light emitting diodes;
and the light protection part (502) is connected in series with the light-emitting diode and is used for limiting the current of the branch circuit where the light-emitting diode is located so as to protect the light-emitting diode.
4. A battery management system according to claim 1, wherein: further comprising:
and the amplifying unit (6) is coupled to the front end of the battery management module (2) and plays a role in amplifying signals accessed to the front end of the battery management module (2).
5. The battery management system of claim 4, wherein: the amplifying unit (6) is a power amplifying circuit coupled to the front end of the battery management module (2).
6. A battery management system according to claim 1, wherein: the power supply unit (1) comprises:
a rectifying unit (11) coupled to a commercial power and outputting a rectified signal;
and the filtering part (12) is coupled to the rectifying part (11) to receive the rectified signal and output a filtered signal.
7. A battery management system according to claim 6, wherein: the filtering part (12) comprises a first filtering capacitor (121) and a second filtering capacitor (122) which are both coupled to the rectifying part (11) for filtering.
8. A battery management system according to claim 6, wherein: the power supply unit (1) further comprises:
and the voltage stabilizing part (13) is coupled to the rectifying part (11) to receive the rectified signal and play a role in stabilizing the signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921761904.0U CN210898565U (en) | 2019-10-19 | 2019-10-19 | Battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921761904.0U CN210898565U (en) | 2019-10-19 | 2019-10-19 | Battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210898565U true CN210898565U (en) | 2020-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921761904.0U Active CN210898565U (en) | 2019-10-19 | 2019-10-19 | Battery management system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210898565U (en) |
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2019
- 2019-10-19 CN CN201921761904.0U patent/CN210898565U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315800 No. 11, Chuangye 1st Road, West District, Ningbo Free Trade Zone, Zhejiang Province Patentee after: NINGBO BATE TECHNOLOGY Co.,Ltd. Address before: 315800 No. 11, Chuangye 1st Road, West District, Ningbo Free Trade Zone, Zhejiang Province Patentee before: NINGBO BATE TECHNOLOGY CO.,LTD. |
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| CP01 | Change in the name or title of a patent holder |