CN214154050U - Battery protection circuit, battery protection board, battery and electronic equipment - Google Patents
Battery protection circuit, battery protection board, battery and electronic equipment Download PDFInfo
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- CN214154050U CN214154050U CN202022501095.9U CN202022501095U CN214154050U CN 214154050 U CN214154050 U CN 214154050U CN 202022501095 U CN202022501095 U CN 202022501095U CN 214154050 U CN214154050 U CN 214154050U
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- management chip
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- voltage stabilizing
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Abstract
The utility model discloses a battery protection circuit, battery protection shield, battery and electronic equipment belongs to the battery field. The battery protection circuit comprises a battery management chip and an LDO voltage stabilizing circuit, wherein an input pin of the battery management chip is used for being connected with an input end of a battery, an input end of the LDO voltage stabilizing circuit is used for being connected with an input end of the battery, an enabling end of the LDO voltage stabilizing circuit is connected with a first LED pin of the battery management chip, and an output end of the LDO voltage stabilizing circuit is used for being connected with an output end of the battery. The battery management chip is used for detecting battery information of the battery, and the LDO voltage stabilizing circuit is used for controlling the on-off of the LDO voltage stabilizing circuit according to the battery information, wherein the battery information comprises at least one of voltage, current, temperature and battery capacity. The battery protection circuit can detect battery information and correspondingly protect the battery, and the service life of the battery and the use safety of the battery are improved.
Description
Technical Field
The utility model relates to a battery field especially relates to a battery protection circuit, battery protection shield, battery and electronic equipment.
Background
When the battery is overcharged, overdischarged, and the discharge current is too large or the circuit is short-circuited, the performance of the battery can be seriously damaged, and the normal use of the battery is influenced, but the related battery protection circuit cannot perform corresponding detection and protection at present.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a battery protection circuit can detect battery information and carry out corresponding protection to the battery, has improved the safety in utilization of battery life and battery.
The utility model discloses still provide a battery protection shield who has above-mentioned battery protection circuit.
The utility model discloses still provide a battery that has above-mentioned battery protection shield.
The utility model discloses still provide an electronic equipment who has above-mentioned battery protection shield or battery.
According to the utility model discloses a battery protection circuit of first aspect embodiment includes:
the battery management chip is used for detecting battery information of the battery;
the input end of the LDO voltage stabilizing circuit is used for being connected with the input end of the battery, the enabling end of the LDO voltage stabilizing circuit is connected with the first LED pin of the battery management chip, the output end of the LDO voltage stabilizing circuit is used for being connected with the output end of the battery, and the LDO voltage stabilizing circuit is used for controlling the on-off of the LDO voltage stabilizing circuit according to the battery information;
wherein the battery information includes at least one of voltage, current, temperature, and battery capacity.
According to the utility model discloses battery protection circuit has following beneficial effect at least: the battery protection circuit detects information such as voltage, current, temperature and battery capacity of the battery through the battery management chip, the LDO voltage stabilizing circuit controls the on-off of the battery according to the detection result of the battery management chip, the battery information can be detected, the battery can be correspondingly protected, and the service life of the battery and the use safety of the battery are improved.
According to some embodiments of the present invention, the battery protection circuit comprises:
and the temperature detection module is connected with the temperature detection interface of the battery management chip and used for detecting the temperature of the battery.
According to some embodiments of the invention, the temperature detection module comprises at least one temperature sensor.
According to some embodiments of the present invention, the battery protection circuit further comprises:
and the overcurrent detection module is respectively and electrically connected with the battery management chip and the output end of the LDO voltage stabilizing circuit and is used for detecting the current of the battery.
According to the utility model discloses a some embodiments, overflow detection module and include:
a first end of the first resistor is connected with the output end of the LDO voltage stabilizing circuit, and a second end of the first resistor is connected with the output end of the battery;
the grid electrode of the MOS tube is connected with the second LED pin of the battery management chip, the drain electrode of the MOS tube is connected with the receiving end of the battery management chip, and the source electrode of the MOS tube is connected with the second end of the first resistor.
According to the utility model discloses a some embodiments, it still includes to overflow detection module:
a first end of the second resistor is connected with a second LED pin of the battery management chip, and a second end of the second resistor is connected with a grid electrode of the MOS tube;
a first end of the third resistor is connected with a receiving end of the battery management chip, and a second end of the third resistor is connected with a drain electrode of the MOS tube;
and a first end of the fourth resistor is connected with the receiving end of the battery management chip and the first end of the third resistor, and a second end of the fourth resistor is connected with the grounding end of the battery.
According to some embodiments of the present invention, the battery protection circuit further comprises a first diode, a cathode of the first diode is connected to the second end of the first resistor, an output end of the battery is connected, and an anode of the first diode is connected to the ground terminal of the battery.
According to some embodiments of the present invention, the battery protection circuit further comprises a first capacitor, a first end of the first capacitor is connected to a cathode of the first diode, and a second end of the first capacitor is connected to an anode of the first diode.
According to the utility model discloses a battery protection shield of second aspect embodiment includes:
a circuit substrate;
the battery protection circuit of the embodiment of the first aspect;
wherein the battery protection circuit is integrated on the circuit substrate.
According to the utility model discloses battery protection shield has following beneficial effect at least: the battery protection circuit integrated on the circuit substrate of the battery protection board detects information such as voltage, current, temperature and battery capacity of a battery through the battery management chip, the LDO voltage stabilizing circuit controls the on-off of the battery according to the detection result of the battery management chip, the battery information can be detected, the battery can be correspondingly protected, and the service life of the battery and the use safety of the battery are improved.
According to the utility model discloses a battery of third aspect embodiment includes:
an electric core;
the battery protection plate according to the embodiment of the second aspect.
According to the utility model discloses battery has following beneficial effect at least: the battery detects information such as voltage, current, temperature and battery capacity of the battery through the battery management chip of the battery protection circuit, the LDO voltage stabilizing circuit controls the on-off of the battery according to the detection result of the battery management chip, the battery information can be detected, the battery can be correspondingly protected, the circuit structure is simple, and the service life of the battery and the use safety of the battery are improved.
According to the utility model discloses an electronic equipment of fourth aspect embodiment includes:
the battery protection sheet of the embodiment of the second aspect or the battery of the embodiment of the third aspect.
According to the utility model discloses electronic equipment has following beneficial effect at least: the electronic equipment can exert the performance to the maximum extent by using the battery or the battery protection board, monitors and manages the battery in real time during charging and discharging, can detect the battery information and correspondingly protect the battery, and improves the use safety of the electronic equipment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
fig. 1 is a schematic structural diagram of a battery protection circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery protection circuit according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery protection circuit according to another embodiment of the present invention.
Reference numerals: 110. a battery management chip; 120. the LDO voltage stabilizing circuit; 210. an overcurrent detection module; 220. a temperature detection module; 310. a temperature sensor.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In a first aspect, refer to fig. 1, the embodiment of the utility model provides a battery protection circuit includes battery management chip 110 and LDO voltage stabilizing circuit 120, wherein, battery management chip 110's input pin is used for connecting the input of battery, battery management chip 110 is used for detecting the battery information of battery, LDO voltage stabilizing circuit 120's input is used for connecting the input of battery, LDO voltage stabilizing circuit 120's enable end is connected with the first LED pin of battery management chip, LDO voltage stabilizing circuit 120's output is used for connecting the output of battery, LDO voltage stabilizing circuit 120 is used for controlling the break-make of LDO voltage stabilizing circuit 120 according to battery information, wherein, battery information includes voltage, the electric current, the temperature, at least one in the battery capacity.
The battery management chip 110 and the LDO voltage stabilizing circuit 120 are directly connected to an output loop of the battery, when the battery annoying input end starts to supply power, the battery management chip 110 detects battery information of the battery, processes the battery information, and determines a relationship between battery information parameters and preset protection range parameters, so that a high level/low level signal is output through a first LED pin of the battery management chip 110 to control the on or off of the LDO voltage stabilizing circuit 120, thereby controlling the normal output of the battery and realizing the protection of the battery. The battery protection circuit monitors the working state of the battery in real time through the battery management chip, when the conditions of undervoltage or overcurrent or low capacity or high temperature of the battery and the like are detected, the voltage of the enabling end of the LDO voltage stabilizing circuit 120 is reduced through the battery management chip 110, the output of the LDO voltage stabilizing circuit is directly cut off, the battery can be protected in time, and the service life of the battery and the use safety of the battery are improved.
In some embodiments, when the input end of the battery starts to supply power, and the battery management chip 110 detects that the parameters of the voltage, the current, the temperature, and the battery capacity are within the preset ranges, the first LED pin of the battery management chip 110 outputs a high-level signal to drive the LDO regulator circuit 120 to operate normally, so that the battery can output a voltage normally through the output end of the LDO regulator circuit 120.
In some embodiments, when the voltage input at the input end of the battery is too low, the battery management chip 110 detects that the voltage parameter is not within the preset range, and at this time, the first LED pin of the battery management chip 110 outputs a low level signal to turn off the LDO voltage stabilizing circuit 120, thereby turning off the battery, stopping outputting the voltage, and implementing the under-voltage protection of the battery.
In some embodiments, when the battery management chip 110 detects that the battery capacity is lower than the preset range, the first LED pin of the battery management chip 110 outputs a low level signal to turn off the LDO voltage stabilizing circuit 120, thereby turning off the battery, stopping outputting the voltage, and implementing low capacity protection of the battery.
It should be noted that the preset protection ranges of voltage, current, temperature and battery capacity can be adjusted according to actual conditions, so that the detection and control protection of the battery have good flexibility, and the use safety of the battery in any scene is met.
Referring to fig. 2, in some embodiments, the battery protection circuit includes a temperature detection module 220, and the temperature detection module 220 is connected to the temperature detection interface of the battery management chip 110 and is used for detecting the temperature of the battery. The temperature detection module 220 detects the temperature of the battery, the battery management chip 110 receives the temperature detection result through the temperature detection interface, compares the detected temperature value with a preset temperature protection range, and controls the voltage output of the battery by controlling the on-off of the LDO voltage stabilizing circuit 120 when the detected temperature value is monitored to exceed the temperature protection range, so as to achieve the purpose of battery over-temperature protection.
Referring to fig. 3, in some embodiments, the temperature detection module 220 includes at least one temperature sensor 310. Taking fig. 3 as an example, the temperature detecting module 220 includes a temperature sensor 310 and a thermistor R5, the temperature sensor 310 and the thermistor R5 are connected to the temperature detecting interface of the battery management chip 110 after being streamed, and when the battery management chip 110 detects that the temperature is too high through the thermistor R5 and the temperature sensor 310, the first LED pin of the battery management chip 110 outputs a low level signal to turn off the output of the LDO voltage regulator circuit 120, thereby turning off the battery, stopping the output, and implementing the over-temperature protection.
Referring to fig. 2, in some embodiments, the battery protection circuit includes an over-current detection module 210, and the over-current detection module 210 is electrically connected to the battery management chip 110 and the output terminal of the LDO voltage regulator circuit 120, respectively, for detecting the current of the battery. The over-current detection module 210 in the battery protection circuit is electrically connected with the battery management chip 110 and the output end of the LDO voltage stabilizing circuit 120, the current of the battery is monitored through the battery management chip 110, the over-current detection module 210 detects the current change, the battery management module 110 receives the current change and processes the current value, the on-off of the LDO voltage stabilizing circuit 120 is controlled according to the detection result to control the voltage output of the battery, and therefore over-current protection of the battery is achieved.
Referring to fig. 3, in some embodiments, the over-current detection module 210 includes a first resistor R1 and a MOS transistor S1, a first end of the first resistor R1 is connected to the output end of the LDO regulator circuit 120, a second end of the first resistor R1 is connected to the output end of the battery, a gate of the MOS transistor S1 is connected to the second LED pin of the battery management chip 110, a drain of the MOS transistor S1 is connected to the receiving end pin12 of the battery management chip 110, and a source of the MOS transistor S1 is connected to the second end of the first resistor R1.
When the output end of the LDO voltage stabilizing circuit 120 discharges, the receiving end pin12 of the battery management chip 110 calculates the real-time current of the battery in the battery management chip 110 by comparing the voltage drop across the first resistor R1, and when the real-time current of the battery exceeds the preset protection range, the first LED pin of the battery management chip 110 outputs a low level signal to close the output of the LDO voltage stabilizing IC120, thereby shutting off the battery, stopping outputting the voltage, and realizing the overcurrent protection of the battery.
Further, the over-current detection module 210 further includes a second resistor R2, a third resistor R3, and a fourth resistor R4. The first end of the second resistor R2 is connected to the second LED pin of the battery management chip 110, the second end of the second resistor R2 is connected to the gate of the MOS transistor S1, the first end of the third resistor R3 is connected to the receiving terminal pin12 of the battery management chip 110, the second end of the third resistor R3 is connected to the drain of the MOS transistor S1, the first end of the fourth resistor R4 is connected to the receiving terminal pin12 of the battery management chip 110 and the first end of the third resistor R3, and the second end of the fourth resistor R4 is connected to the ground terminal of the battery.
In order to achieve power consumption optimization, the second LED pin of the battery management chip 110 is turned on within a preset time interval, and the MOS transistor S1 is controlled to monitor the current, so that overcurrent detection and protection of the battery can be performed, power consumption due to real-time current detection is reduced, and cost is reduced.
Referring to fig. 3, in some embodiments, the battery protection circuit further includes a first diode D1, a cathode of the first diode D1 is connected to the second terminal of the first resistor R1 and the output terminal of the battery, and an anode of the first diode D1 is connected to the ground terminal of the battery. The first diode D1 is reversely connected in the battery protection circuit, so that the circuit can be stabilized and protected, and the stable output of the voltage can be ensured.
Referring to fig. 3, in some embodiments, the battery protection circuit further includes a first capacitor C1, a first terminal of the first capacitor C1 is connected to a cathode of a first diode D1, and a second terminal of the first capacitor C1 is connected to an anode of a first diode D1. When the first diode D1 is used for voltage stabilization protection, the first capacitor C1 connected in parallel across the first diode D1 can perform a filtering function, thereby further ensuring the stability of voltage output.
In some embodiments, the battery management chip 110 is a Gas gauge IC chip. The Gas gauge IC chip can monitor the current, voltage, temperature and battery power of the battery, thereby determining the charge-discharge state of the battery, and controlling the LDO voltage stabilizing circuit when detecting overcurrent, undervoltage, high temperature or low power, thereby adjusting the normal output of the battery to protect the battery, and improving the service life of the battery and the use safety of the battery.
In some embodiments, the LDO regulator of the LDO voltage regulator circuit 120 is model number TPS 709. The LDO voltage stabilizer of the type is sensitive to power consumption, high in temperature range precision, suitable for a system powered by a battery, and capable of sensitively protecting the battery from overcurrent, undervoltage, high temperature or low power, so that the use safety of the battery is improved.
The second aspect, the utility model provides an in the battery protection circuit include circuit substrate and the battery protection circuit of any embodiment of the first aspect, wherein, battery protection circuit is integrated on circuit substrate, integrated battery protection circuit passes through the voltage that battery management chip detected the battery on the circuit substrate of this kind of battery protection shield, the electric current, the temperature, information such as battery capacity, the break-make of battery is controlled according to the testing result of battery management chip to LDO voltage stabilizing circuit, can detect battery information and carry out corresponding protection to the battery, the safety in utilization of battery life and battery has been improved.
The third aspect, the embodiment of the utility model provides a battery includes the battery protection shield of electricity core and second aspect embodiment, and information such as voltage, electric current, temperature, battery capacity that this kind of battery passes through battery protection circuit's battery management chip detection battery, the break-make of battery is controlled according to battery management chip's testing result to LDO voltage stabilizing circuit, can detect battery information and carry out corresponding protection to the battery, and not only circuit structure is simple, has still improved the safety in utilization of battery life and battery.
In a fourth aspect, the present invention provides an electronic device including the battery protection board of the second aspect embodiment or the battery of the third aspect embodiment, and this kind of electronic device can exert its performance to the utmost extent through using this kind of battery or battery protection board, carries out real-time monitoring and management to the battery when charging and discharging, can detect battery information and carry out corresponding protection to the battery to guarantee that the group battery can normally work, improved electronic device's safety in utilization.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (11)
1. A battery protection circuit, comprising:
the battery management chip is used for detecting battery information of the battery;
the input end of the LDO voltage stabilizing circuit is used for being connected with the input end of the battery, the enabling end of the LDO voltage stabilizing circuit is connected with the first LED pin of the battery management chip, the output end of the LDO voltage stabilizing circuit is used for being connected with the output end of the battery, and the LDO voltage stabilizing circuit is used for controlling the on-off of the LDO voltage stabilizing circuit according to the battery information;
wherein the battery information includes at least one of voltage, current, temperature, and battery capacity.
2. The battery protection circuit of claim 1, further comprising:
and the temperature detection module is connected with the temperature detection interface of the battery management chip and used for detecting the temperature of the battery.
3. The battery protection circuit of claim 2, wherein the temperature detection module comprises at least one temperature sensor.
4. The battery protection circuit of claim 1, further comprising:
and the overcurrent detection module is respectively and electrically connected with the battery management chip and the output end of the LDO voltage stabilizing circuit and is used for detecting the current of the battery.
5. The battery protection circuit of claim 4, wherein the over-current detection module comprises:
a first end of the first resistor is connected with the output end of the LDO voltage stabilizing circuit, and a second end of the first resistor is connected with the output end of the battery;
the grid electrode of the MOS tube is connected with the second LED pin of the battery management chip, the drain electrode of the MOS tube is connected with the receiving end of the battery management chip, and the source electrode of the MOS tube is connected with the second end of the first resistor.
6. The battery protection circuit of claim 5, wherein the over-current detection module further comprises:
a first end of the second resistor is connected with a second LED pin of the battery management chip, and a second end of the second resistor is connected with a grid electrode of the MOS tube;
a first end of the third resistor is connected with a receiving end of the battery management chip, and a second end of the third resistor is connected with a drain electrode of the MOS tube;
and a first end of the fourth resistor is connected with the receiving end of the battery management chip and the first end of the third resistor, and a second end of the fourth resistor is connected with the grounding end of the battery.
7. The battery protection circuit of claim 5, further comprising a first diode, wherein a cathode of the first diode is connected to the second terminal of the first resistor and the output terminal of the battery, and an anode of the first diode is connected to the ground terminal of the battery.
8. The battery protection circuit of claim 7, further comprising a first capacitor, wherein a first terminal of the first capacitor is connected to a cathode of the first diode, and wherein a second terminal of the first capacitor is connected to an anode of the first diode.
9. A battery protection plate, comprising:
a circuit substrate;
a battery protection circuit according to any one of claims 1 to 8;
wherein the battery protection circuit is integrated on the circuit substrate.
10. A battery, comprising:
an electric core;
the battery protection sheet as claimed in claim 9.
11. An electronic device, comprising:
the battery protection plate as claimed in claim 9 or the battery as claimed in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022501095.9U CN214154050U (en) | 2020-11-02 | 2020-11-02 | Battery protection circuit, battery protection board, battery and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022501095.9U CN214154050U (en) | 2020-11-02 | 2020-11-02 | Battery protection circuit, battery protection board, battery and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214154050U true CN214154050U (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022501095.9U Active CN214154050U (en) | 2020-11-02 | 2020-11-02 | Battery protection circuit, battery protection board, battery and electronic equipment |
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| Country | Link |
|---|---|
| CN (1) | CN214154050U (en) |
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2020
- 2020-11-02 CN CN202022501095.9U patent/CN214154050U/en active Active
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