CN113890126B - Protection controller applied to electronic equipment and electronic equipment - Google Patents

Protection controller applied to electronic equipment and electronic equipment Download PDF

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Publication number
CN113890126B
CN113890126B CN202110342486.7A CN202110342486A CN113890126B CN 113890126 B CN113890126 B CN 113890126B CN 202110342486 A CN202110342486 A CN 202110342486A CN 113890126 B CN113890126 B CN 113890126B
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China
Prior art keywords
battery
protection controller
voltage
module
threshold
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CN202110342486.7A
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CN113890126A (en
Inventor
曹雷
周海滨
邱钰鹏
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Honor Device Co Ltd
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Honor Device Co Ltd
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Priority to CN202110342486.7A priority Critical patent/CN113890126B/en
Publication of CN113890126A publication Critical patent/CN113890126A/en
Priority to PCT/CN2022/081273 priority patent/WO2022206394A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The embodiment of the application provides a protection controller applied to electronic equipment and the electronic equipment, wherein the electronic equipment comprises a first battery and a second battery, and the protection controller is configured to be connected with the first battery and the second battery; a protection controller for: detecting parameters, wherein the parameters are the pressure difference between the first battery and the second battery or the current value of the protection controller; in response to the parameter not meeting a preset condition with a preset threshold, disconnecting the first battery from the second battery; and in response to the parameter and the threshold meeting preset conditions, the first battery and the second battery are communicated, and the first battery and the second battery are connected in parallel. In this embodiment, in the manufacturing stage of electronic equipment, the staff need not to select the battery that the voltage is the same in advance, and the protection controller can be based on the parameter between the battery, protects the safety of battery, avoids the battery to damage, can improve battery yield, reduces staff's work load, improves production line efficiency.

Description

Protection controller applied to electronic equipment and electronic equipment
Technical Field
The embodiment of the application relates to a charging technology, in particular to a protection controller applied to electronic equipment and the electronic equipment.
Background
When the electronic equipment is connected with the power supply, the power supply can charge the electronic equipment, and the essence of the charging of the power supply to the electronic equipment is as follows: the power supply charges a battery in the electronic device. When a user uses the electronic device, the battery discharge may power a load in the electronic device. In order to improve the charging efficiency of the electronic device, the electronic device may adopt a structure in which the double batteries are connected in parallel.
During the manufacturing stage of electronic devices, workers need to install batteries on the electronic devices. Since the batteries are discharged to different extents after production, the voltages of the batteries are different even for batteries produced in the same lot. When the staff installs the batteries, because the batteries are connected in parallel, if the voltage of the batteries has a large pressure difference, circulation current can be caused, and a large current mutual charging phenomenon is generated between the batteries connected in parallel, so that the batteries are burnt out.
Disclosure of Invention
The embodiment of the application provides a protection controller applied to electronic equipment and the electronic equipment, which can improve the production line efficiency.
In a first aspect, embodiments of the present application provide a protection controller applied to an electronic device, the electronic device including a first battery and a second battery, the protection controller configured to be connected to the first battery and the second battery. Wherein, the protection controller is used for: detecting a parameter, wherein the parameter is the pressure difference between the first battery and the second battery or the current value of the protection controller; in response to the parameter not meeting a preset condition with a preset threshold, disconnecting the first battery from the second battery; and in response to the parameter and the threshold value meeting the preset condition, the first battery and the second battery are communicated, and the first battery and the second battery are connected in parallel.
Wherein, the parameter and the preset threshold value not meeting the preset condition can be understood as: the magnitude of the parameter and the preset threshold does not meet the preset condition, and the preset condition may be that the preset threshold is larger than the parameter, or that the preset threshold is larger than or equal to the parameter. In this embodiment of the application, in the manufacturing stage of electronic equipment, the staff need not to select the battery that the voltage is the same in advance, but by the protection controller based on the parameter, the safety of protection battery avoids the battery to damage, can improve battery yield, reduces staff's work load, improves production line efficiency.
In one possible implementation manner, the parameter is the pressure difference, the threshold is a pressure difference threshold, and the preset condition is that the pressure difference is less than or equal to the pressure difference threshold. Because the differential pressure can be converted into a product of the current value and the resistance value of the protection controller, in one possible implementation, the parameter is the current value of the protection controller, the threshold is a current threshold, and the preset condition is that the current value is less than or equal to the current threshold. In one possible implementation, the differential pressure threshold set in embodiments of the present application may be less than or equal to "the product of the current threshold and the protection controller resistance".
The structure of the protection controller is presented in two aspects:
the method comprises the following steps: the parameter is the pressure difference, the threshold is a pressure difference threshold, and the preset condition is that the pressure difference is smaller than or equal to the pressure difference threshold. In one possible implementation, the protection controller includes: the voltage detection device is connected with the first battery, the second battery and the isolation module respectively, and the isolation module is connected with the first battery and the second battery respectively.
In this possible implementation manner, the voltage detection device is configured to: detecting the pressure differential; outputting a disconnect command to the isolation module in response to the differential pressure being greater than the differential pressure threshold; and outputting a conduction instruction to the isolation module in response to the pressure difference being less than or equal to the pressure difference threshold. The isolation module is used for: disconnecting based on the disconnection instruction to disconnect the connection between the first battery and the second battery; and conducting based on the conducting instruction so as to communicate the first battery and the second battery. In one embodiment, the voltage detection means may be in the form of a chip or a circuit, and the isolation module may be in the form of a chip or a circuit.
The protection controller can be composed of a voltage detection device and an isolation module, and the voltage detection device can drive the isolation module to be disconnected and connected based on the magnitude relation between the pressure difference and the pressure difference threshold value so as to disconnect and connect the first battery and the second battery. Furthermore, during the production and manufacturing stage, the staff does not need to select the batteries with the same voltage in advance, the protection controller can disconnect the connection between the first battery and the second battery when the first battery and the second battery are connected, the safety of the batteries is protected, the battery damage is avoided, the yield of the batteries can be improved, the workload of the staff can be reduced, and the production line efficiency is improved.
In one possible implementation, the voltage detection device includes: the sampling device comprises a sampling module and a driving module, wherein the input end of the sampling module is respectively connected with the first battery, the second battery and the isolation module, the output end of the sampling module is connected with the input end of the driving module, and the output end of the driving module is connected with the isolation module. Wherein, the sampling module is used for: the differential pressure is detected and output to the drive module. The driving module is used for: outputting a low level to the isolation module in response to the differential pressure being greater than the differential pressure threshold, the low level being used to characterize the disconnect command; and outputting a high level to the isolation module in response to the pressure difference being less than or equal to the pressure difference threshold, wherein the high level is used for representing the on instruction. In one embodiment, the sampling module and the driving module may each be separately in the form of a chip or a circuit.
In this embodiment of the application, the protection controller may be composed of an isolation module, a sampling module and a driving module, where the sampling module may obtain a pressure difference between the first battery and the second battery, and output the pressure difference to the driving module. The driving module can compare the pressure difference between the first battery and the second battery with the pressure difference threshold value, so as to control the isolation module to be connected or disconnected, thereby achieving the purpose of connecting and disconnecting the first battery and the second battery, and further achieving the purpose of improving the production line efficiency, and the related description is specifically referred to above.
In one possible implementation, the isolation module may include a switch, and the isolation module may be turned off and on by the switch to disconnect or connect the first battery and the second battery.
In one possible implementation, the switch includes: a first switching tube and a second switching tube; the output end of the driving module is respectively connected with the first end of the first switching tube and the first end of the second switching tube, the second end of the first switching tube is respectively connected with the first battery and the input end of the sampling module, the third end of the first switching tube is connected with the second end of the second switching tube, and the third end of the second switching tube is respectively connected with the second battery and the input end of the sampling module. In one possible implementation, the first switching tube and the second switching tube are field effect tube MOS.
In one possible implementation, the sampling module is a differential amplifying circuit. In one possible implementation, the driving module is a comparator circuit. It should be appreciated that the sampling module may also be other types of circuits for acquiring the differential pressure of the first and second batteries and the drive module may be other types of circuits for comparing the differential pressure to a differential pressure threshold.
And two,: the parameter is a current value of the protection controller, the threshold is a current threshold, and the preset condition is that the current value is smaller than or equal to the current threshold. In one possible implementation, the protection controller includes: a current detection device and an isolation module; the current detection device is respectively connected with the first battery, the second battery and the isolation module, and the isolation module is respectively connected with the first battery and the second battery.
In this possible implementation manner, the current detection device is configured to: detecting the current value; outputting a disconnect command to the isolation module in response to the current value being greater than the current threshold; and outputting a conduction instruction to the isolation module in response to the current value being less than or equal to the current threshold. The isolation module is used for: disconnecting based on the disconnection instruction to disconnect the connection between the first battery and the second battery; and conducting based on the conducting instruction so as to communicate the first battery and the second battery. In one embodiment, the current detection means may be in the form of a chip or a circuit, and the isolation module may be in the form of a chip or a circuit. The isolation module may include a switch, as described above with reference to the related description.
The protection controller can be composed of a current detection device and an isolation module, the current detection device can drive the isolation module to be disconnected and connected based on the magnitude relation between the current value and the current threshold value of the protection controller, so that the disconnection and the connection of the first battery and the second battery are realized, and the aim of improving the production line efficiency can be realized.
In general, during the manufacturing stage of the electronic device, the voltage difference between the first battery and the second battery is small, and the protection controller may conduct the first battery and the second battery, but in a special case, the voltage difference between the first battery and the second battery is large, and the protection controller disconnects the first battery from the second battery, so that if the electronic device with the disconnected battery reaches the use stage of the user, the first battery and the second battery are separately charged, resulting in unbalanced voltage of the first battery and the second battery. In order to ensure that the first battery and the second battery in the electronic device are conducted during the use period of the user, the first battery and the second battery with large voltage difference need to be precharged during the manufacturing period of the electronic device so as to reduce the voltage difference between the first battery and the second battery, and the first battery and the second battery are conducted.
In one possible implementation, the driving module is configured to be connected with a micro processing unit MCU, which is connected with a display device. The driving module is further used for: outputting the low level to the MCU in response to the differential pressure being greater than the differential pressure threshold, and outputting the high level to the MCU in response to the differential pressure being less than or equal to the differential pressure threshold for instructing the MCU to send a prompt message to the display device.
In this possible implementation, since the protection controller may detect the differential pressure of the first battery and the second battery twice during the installation of the batteries, the MCU may determine the differential pressure between the first battery and the second battery based on the level of the two outputs of the driving module. When the MCU detects that the driving module outputs low voltage for the first time and outputs high voltage for the second time, it can be determined that the first battery and the second battery are communicated, that is, the differential pressure of the first battery and the second battery is smaller than or equal to the differential pressure threshold value. When the MCU detects that the driving module outputs low voltage for the first time and outputs low voltage for the second time, it is determined that the pressure difference between the first battery and the second battery is larger than the pressure difference threshold value, the MCU can display the prompt information sent by the device, and the display device can output the prompt information so as to prompt a worker to precharge the battery with lower voltage in the first battery and the second battery, so that the voltage balance of the first battery and the second battery is ensured.
In a second aspect, embodiments of the present application provide an electronic device that may include a first battery, a second battery, and a charge-discharge system. The system includes the first aspect and the protection controller in each possible implementation manner, and has the same technical effects as the first aspect, and reference may be made to the description above specifically.
In one possible implementation, the system further includes: a first voltage converter and a second voltage converter. The output end of the first voltage converter is connected with the first battery and the protection controller respectively, the output end of the second voltage converter is connected with the second battery and the protection controller respectively, and the input end of the first voltage converter is connected with the input end of the second voltage converter.
In this possible implementation, when the system is in a charging mode and the protection controller communicates with the first battery and the second battery, the first voltage converter is configured to charge the first battery and the second battery, and the second voltage converter is configured to charge the first battery and the second battery. In one possible implementation, the first voltage converter and the second voltage converter are both charge pumps.
When the system is in a charging mode, the protection controller can be communicated with the first battery and the second battery, so that the first battery and the second battery are connected in parallel, and the first voltage converter can charge the first battery and the second battery, the second voltage converter can charge the first battery and the second battery, the charging current of the first battery and the charging current of the second battery are both from the first voltage converter and the second voltage converter, and the charging current of the first battery is the same as the charging current of the second battery, so that the purpose of voltage balance can be achieved. In addition, the first battery and the second battery can be charged according to the same charging current, and can be simultaneously charged, so that the charging speed is high.
In addition, when the first voltage converter fails, the second voltage converter can charge the first battery, so that the problem that the first battery cannot be charged when the voltage converter corresponding to the first battery fails is avoided. The charging modes in the embodiment of the application are more.
In one possible implementation, the electronic device further includes: a load, the system further comprising: and the input end of the discharging module is respectively connected with the input end of the first voltage converter and the input end of the second voltage converter, and the output end of the discharging module is respectively connected with the second battery, the protection controller and the load.
When the system is in a charging mode and the protection controller is communicated with the first battery and the second battery, the discharging submodule, the first battery and the second battery supply power for the load. When the system is in a charging mode and the protection controller disconnects the first battery and the second battery, the discharging submodule and the second battery both supply power to the load.
In this embodiment, when protection controller intercommunication first battery with the second battery, first battery and the second battery is the load power supply, discharge performance is good.
In one possible implementation, when the system is in a discharge mode and the protection controller communicates with the first battery and the second battery, both the first battery and the second battery power the load. The second battery supplies power to the load when the system is in a discharge mode and the protection controller disconnects the first battery and the second battery.
In this possible implementation manner, the first battery and the second battery may both supply power to the load, and the first battery and the second battery may be discharged in parallel, so that voltage balance of the first battery and the second battery may be ensured.
The embodiment of the application provides a protection controller applied to electronic equipment and the electronic equipment, wherein the electronic equipment comprises a first battery and a second battery, and the protection controller is used for being connected with the first battery and the second battery; a protection controller for: detecting parameters, wherein the parameters are the pressure difference between the first battery and the second battery or the current value of the protection controller; in response to the parameter not meeting a preset condition with a preset threshold, disconnecting the first battery from the second battery; and in response to the parameter and the threshold meeting preset conditions, the first battery and the second battery are communicated, and the first battery and the second battery are connected in parallel. In this embodiment, in the manufacturing stage of electronic equipment, the staff need not to select the battery that the voltage is the same in advance, and protection controller can be based on the parameter of battery, protects the safety of battery, avoids the battery to damage, can improve battery yield, reduces staff's work load, improves production line efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a charge-discharge system in a conventional electronic device;
FIG. 2 is a schematic diagram of charging an existing electronic device;
fig. 3 is a schematic structural diagram of a charge-discharge system according to an embodiment of the present disclosure;
Fig. 4 is a schematic structural diagram of a charge-discharge system according to an embodiment of the present disclosure;
fig. 5A is a schematic structural diagram of a protection controller according to an embodiment of the present application;
fig. 5B is another schematic structural diagram of the protection controller according to the embodiment of the present application;
fig. 6 is another schematic structural diagram of a protection controller according to an embodiment of the present application;
FIG. 7 is a schematic diagram of the connection of the detection controller to the charge-discharge system in the production line;
fig. 8 is a schematic diagram of a charging and discharging system according to an embodiment of the present disclosure during charging;
FIG. 9 is a schematic charging diagram of the charge and discharge system of FIG. 8 when the charge and discharge system fails;
fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Reference numerals illustrate:
m1-a first MOS;
m2-a second MOS;
r1-a first resistor;
r2-a second resistor;
r3-a third resistor;
r4-fourth resistor;
r5-fifth resistor;
r6-sixth resistance;
r7-seventh resistor;
r8-eighth resistor;
r9-ninth resistance;
RL-load resistance;
CO 1-a first comparator;
a CO 2-second comparator;
CO 3-third comparator.
Detailed Description
Fig. 1 is a schematic diagram of a charge and discharge system in a conventional electronic device. As shown in fig. 1, the charge and discharge system includes: charge and discharge control device and battery pack. The charge and discharge control device is arranged on a main board of the electronic equipment, and the battery pack can be connected with the charge and discharge control device on the main board through a Board To Board (BTB) connector. The charge/discharge control device includes: a charge pump (charge pump) 1 and a charge pump 2. The charge pump may be referred to as a charge, and charge 1 and charge 2 in the charge-discharge control device are used to charge the battery pack. The charge-discharge control device further includes: the discharge circuit is connected to the charge 3, and the charge 3 is referred to as a discharge module hereinafter. The electronic discharging module is used for supplying power to a load in the electronic equipment and can also be used for charging the battery pack. The load in the electronic device may be a central processor (central processing unit, CPU), a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP) or the like in the electronic device. Since the power of the charge 3 in the discharge module is small, the discharge module has a small contribution to charging the battery, and for convenience of understanding, the following embodiments take the process of charging the battery by the charge 1 and the charge 2 as an example. The battery pack may include a battery 1 and a battery 2. It should be understood that C represents charge in the figure, e.g., C1 represents charge 1, C2 represents charge 2, and C3 represents charge 3.
The input end of the charge 1, the input end of the charge 2 and the input end of the discharging submodule are connected, the output end of the charge 1 is connected with the battery 1 and the battery 2 respectively, the output end of the charge 2 is connected with the battery 1 and the battery 2 respectively, and the output end of the discharging submodule is connected with the battery 1 and the battery 2 respectively and loads of electronic equipment. As shown in fig. 2, the electronic device is connected to a power supply through a charger, and the input terminal of the charger1, the input terminal of the charger2, and the input terminal of the discharging submodule are all connected to the charger, and fig. 2 illustrates the electronic device as a mobile phone. The charger may convert the supply voltage to a low voltage input to the charge 1, the charge 2, and the discharge module. The charger1 may convert the voltage input from the charger into a charging voltage required for the battery 1 to be input to the battery 1 and the battery 2. The charger2 may convert the voltage input from the charger into a charging voltage required for the battery 2 to be input to the battery 1 and the battery 2. And the discharging electronic module can supply power for a load by adopting voltage input by a charger. The battery 1 and the battery 2 can also supply power to the load through the discharging electronic module, so that the electronic equipment can realize charging and discharging at the same time when in a charging mode. It should be understood that the electronic device being in a charging mode may be understood as: the electronic device is connected to a power supply that provides a voltage to the charger. The electronic device being in discharge mode can be understood as: the electronic device is not connected to a power supply, and the battery 1 and the battery 2 supply power to the load.
Based on the structure shown in fig. 1, in the stage of manufacturing the electronic device, a worker (or a robot arm) needs to connect the battery to the main board through the BTB connector, that is, connect the battery to the charge/discharge control device. Since natural discharge is performed after the battery is manufactured, there are cases where voltages are different from one battery to another. Because the battery 1 and the battery 2 are connected in parallel, if the voltage difference between the voltages of the battery 1 and the battery 2 is small, the high-voltage battery charges the low-voltage battery with a small current, thereby balancing the voltages of the battery 1 and the battery 2. Among them, the high-voltage battery and the low-voltage battery can be understood as: the voltage of the battery 1 is a high voltage or a low voltage with respect to the voltage of the battery 2. Since the process current is small, the safety of the battery 1 and the battery 2 is not affected. If the voltage difference between the voltages of the battery 1 and the battery 2 is large, the high-voltage battery charges the low-voltage battery with a large current, which causes battery safety problems such as burning the low-voltage battery. Therefore, in the prior art, before the battery is connected to the main board, the staff needs to choose the battery with the same voltage for installation so as to ensure the safety of the battery, but this clearly increases the workload of the staff and reduces the production line efficiency.
The charge and discharge system for multiple batteries provided in the embodiments of the present application is described below with reference to specific embodiments, where the charge and discharge system in the embodiments of the present application is applied to an electronic device. The electronic device may be, but is not limited to, a device with a multi-battery parallel architecture, such as a cell phone, tablet, notebook, wearable device, smart home appliance, internet of things (internet of things, ioT) device, etc. The form of the electronic device in the embodiment of the present application is not particularly limited. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 3 is a schematic structural diagram of a charge-discharge system according to an embodiment of the present application, where the charge-discharge system is connected to a battery pack through a BTB connector. The battery pack includes 2 batteries, battery 1 and battery 2, respectively. Referring to fig. 3, the charge and discharge system includes: the device comprises a charging electronic module, an discharging electronic module and a protection controller group. The charging sub-module may include 2 voltage converters. In one embodiment, the voltage converter may be any component having a function of converting one voltage value to another voltage value (DC-DC) in a direct current circuit. The voltage converter may be a charge pump, which may be in the form of a chip, for example, and the following embodiments will be described with reference to the voltage converter as the charge. Referring to fig. 3, the charge electronic module may include a charge 1 and a charge 2. The protection controller group comprises one protection controller, and the protection controller can exist in the form of a chip or a circuit. The discharge sub-module may include: at least one voltage converter and a discharge circuit, the discharge sub-module may be as described in relation to fig. 1.
The input end of the charge 1, the input end of the charge 2 and the input end of the discharging submodule are connected, the output end of the charge 1 is respectively connected with the first end of the protection controller and the battery 1, the output end of the charge 2 is respectively connected with the second end of the protection controller and the battery 2, and the output end of the discharging submodule is respectively connected with the second end of the protection controller, the battery 2 and a load in the electronic equipment.
The controller is protected and the pressure difference between the battery 1 and the battery 2 can be obtained. In one embodiment, the protection controller may integrate a voltage detection function, and the protection controller may detect the voltage of the battery 1 and the voltage of the battery 2, thereby obtaining the voltage difference between the battery 1 and the battery 2. Wherein the voltage of the battery 1 may be V bat1 The voltage of the battery 2 may be V bat2 . Since the voltage drop on the connection line between the battery 1 and the protection controller is small, and the voltage drop on the connection line between the battery 2 and the protection controller is small, the voltage at point a may be used to represent the voltage of the battery 1, and the voltage at point B may be used to represent the voltage of the battery 2 in the embodiments of the present application. The protection controller can detect the voltage of the point A and the voltage of the point B as the voltage of the battery 1 and the voltage of the battery 2 respectively, and then the protection controller can obtain the pressure difference between the battery 1 and the battery 2.
In one embodiment, since the charger adjusts the charging voltage input to the battery to charge the battery according to the voltage of the battery, the protection controller can output the voltage V from the charger1 in the case that the power supply charges the electronic device out1 As the voltage of the battery 1, the voltage V output by the charge 2 out2 As the voltage of the battery 1, the voltage difference between the battery 1 and the battery 2 is further obtained. In the following embodiments, the protection controller detects the voltage at the point a and the voltage at the point B, and takes the differential pressure between the battery 1 and the battery 2 as an example.
In one embodiment, the protection controller has a pressure differential threshold value V pre-stored therein safe The differential pressure threshold may be understood as the maximum differential pressure threshold that the charge and discharge system can withstand (or the maximum differential pressure threshold that the battery in the charge and discharge system can withstand). When the workerWhen the person installs the battery 1 and the battery 2, the protection controller may detect the voltage at the point a and the voltage at the point B to obtain the pressure difference of the battery 1 and the battery 2. If the protection controller detects that the pressure difference between the battery 1 and the battery 2 is smaller than or equal to the pressure difference threshold value, the protection controller can be conducted, namely the point A and the point B are communicated, and the battery 1 and the battery 2 are kept in parallel connection. If the protection controller detects that the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold, the protection controller can be disconnected, namely the point A and the point B are disconnected, and the battery 1 and the battery 2 are isolated, so that the phenomenon that the battery 1 and the battery 2 generate large-current mutual charging due to the voltage difference is avoided, and the battery 1 or the battery 2 is damaged. It should be understood that isolating cell 1 and cell 2 can be understood as: the connection between the battery 1 and the battery 2 is broken. The connected battery 1 and battery 2 are connected in parallel.
In one embodiment, the protection controller may monitor and obtain the differential pressure of the batteries 1 and 2 (or the current of the protection controller) in real time. In one embodiment, the protection controller may periodically obtain the voltage differential (or the current of the protection controller) between the batteries 1 and 2. For example, the protection controller may acquire the differential pressure between the primary battery 1 and the battery 2 every a first preset time period, which may be 10ms.
In the manufacturing stage of the electronic device, the protection controller may adopt the technical solution described in the application above to obtain the voltage difference between the battery 1 and the battery 2, so as to protect the battery 1 and the battery 2. For example, if the pressure difference threshold is 0.5V, the worker first installs the battery 1, and the protection controller detects the voltage at the point A, namely V bat1 =4v, the protection controller detects the voltage at point B, i.e. V bat2 =0v. The protection controller detects that the voltage difference between the voltage at the point A and the voltage at the point B is larger than the voltage difference threshold value, and isolates the point A from the point B, namely, the battery 1 and the battery 2 are isolated in advance. When the worker installs the battery 2, the protection controller detects the voltage V at the point B bat2 =4.1v, the protection controller determines that the pressure difference between the battery 1 and the battery 2 is smaller than the pressure difference threshold value, and the protection controller may communicate the battery 1 and the battery 2.
In this embodiment of the application, be provided with the protection controller in the charge-discharge system of electronic equipment, the protection controller can detect the pressure differential between the battery, and then when the pressure differential between the battery is greater than pressure differential threshold value, keeps apart the battery, avoids producing the heavy current phenomenon of filling each other between the battery, protects the safety of battery. Similarly, the protection controller can also determine the pressure difference between the batteries by detecting the current value of the protection controller, and then isolate the batteries when the pressure difference is greater than a pressure difference threshold. Therefore, be provided with the charge-discharge system in this application embodiment in the electronic equipment, in the manufacturing stage, the staff need not to select the battery that the voltage is the same in advance, and the protection controller in the charge-discharge system can be based on the pressure difference between the battery, protects the safety of battery, avoids the battery to damage, can improve the battery yield, also can reduce staff's work load, improves production line efficiency.
The structure of the protection controller is described as follows.
Fig. 4 is a schematic structural diagram of a protection controller according to an embodiment of the present application. Referring to fig. 4, in one embodiment, the protection controller may include: the device comprises an isolation module, a sampling module and a driving module. The isolation module is connected with the output end of the charger1 and the battery 1, and the isolation module is also connected with the output end of the charger2 and the battery 2. The input end of the sampling module is connected with the output end of the charge 1, the output ends of the battery 1 and the charge 2, the battery 2 and the isolation module, the output end of the sampling module is connected with the input end of the driving module, and the output end of the driving module is connected with the isolation module.
And the sampling module is used for acquiring the voltages of the battery 1 and the battery 2, acquiring the pressure difference between the battery 1 and the battery 2 and outputting the pressure difference to the driving module. A drive module for comparing the differential pressure to a differential pressure threshold. If the driving module determines that the voltage difference between the battery 1 and the battery 2 is less than or equal to the voltage difference threshold value, the driving isolation module is conducted so as to keep the battery 1 and the battery 2 connected in parallel. If the driving module determines that the pressure difference between the battery 1 and the battery 2 is greater than the pressure difference threshold value, the driving isolation module is disconnected to isolate the battery 1 and the battery 2 and protect the battery 1 and the battery 2. And the isolation module is used for isolating and conducting the battery 1 and the battery 2.
In one embodiment, the sampling module and the driving module may be chips. The sampling chip can integrate a voltage detection function and a calculation function, the driving chip can prestore a differential pressure threshold value, and the driving chip can integrate a voltage driving function to drive the isolation module to be disconnected and connected. In one embodiment, the isolation module comprises a switch, and the switch can be opened or closed to realize the opening and the closing of the isolation module.
In one embodiment, the sampling module may be a differential amplification circuit. The differential amplifying circuit may include: a first comparator (comparator) CO1, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and a ninth resistor R9. The battery 1 is connected with a first end of a sixth resistor R6, a second end of the sixth resistor R6 is respectively connected with a first end of a seventh resistor R7 and a negative electrode input end of the first comparator CO1, and a second end of the seventh resistor R7 is connected with an output end of the first comparator CO 1. The battery 2 is connected to a first end of an eighth resistor R8, a second end of the eighth resistor R8 is connected to a first end of a ninth resistor R9 and a positive input end of the first comparator CO1, and a second end of the ninth resistor R9 is grounded. The resistance of the sixth resistor R6 is equal to the resistance of the eighth resistor R8, and the resistance of the seventh resistor R7 is equal to the resistance of the ninth resistor R9. Wherein the supply voltage of the first comparator CO1 is (V CC2 -(-V CC2 ))＝2V CC2 . It should be understood that the sampling module is illustrated in fig. 4 as a differential amplifying circuit, and the differential amplifying circuit may be replaced by another amplifying circuit for obtaining the voltage difference between the battery 1 and the battery 2.
In one embodiment, the driving module may be a comparator circuit. The comparator circuit may include a second comparator CO2, a third comparator CO3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, and a load resistor RL. The output end of the first comparator CO1 is connected with the first end of the fifth resistor R5, the second end of the fifth resistor R5 is respectively connected with the first end of the fourth resistor R4, the negative electrode input end of the second comparator CO2 and the positive electrode input end of the third comparator CO3, and the negative electrode input end of the second comparator CO2 is connected with the positive electrode input end of the third comparator CO 3. The second end of the fourth resistor R4 is connected to the first end of the first resistor R1 and the first end of the load resistor RL, respectively. The second end of the first resistor R1 is respectively connected with the second comparatorThe positive electrode input end of the CO2 and the first end of the second resistor R2 are connected. The second end of the second resistor R2 is connected with the first end of the third resistor R3, the first end of the third resistor R3 is also connected with the negative electrode input end of the third comparator CO3, and the second end of the third resistor R3 is grounded. The output end of the second comparator CO2 is respectively connected with the output end of the third comparator CO3, the second end of the load resistor RL and the isolation module. The resistance of the fourth resistor R4 is equal to the resistance of the fifth resistor R5. Wherein the power supply voltage of the second comparator CO2 is V CC1 The power supply voltage of the third comparator CO3 is V CC1 . It should be understood that the driver module is illustrated in fig. 4 as a comparator circuit, and that the comparator circuit may be replaced by other types of comparator circuits.
In one embodiment, the isolation module includes a first switching tube and a second switching tube. The output end of the driving module is connected with the first end of the first switching tube and the first end of the second switching tube respectively, the second end of the first switching tube is connected with the input ends of the first battery, the electronic charging module and the sampling module respectively, the third end of the first switching tube is connected with the second end of the second switching tube, and the third end of the second switching tube is connected with the input ends of the second battery, the electronic charging module and the sampling module respectively.
In one embodiment, the first switching tube and the second switching tube are field effect transistors, MOS, the first switching tube is a first MOSM1, and the second switching tube is a second MOSM 2. The grid electrode of the M1 is respectively connected with the output end of the second comparator CO2 and the output end of the third comparator CO3, the source electrode of the M1 is connected with the battery 1, and the drain electrode of the M1 is connected with the source electrode of the M2. The grid electrode of the M2 is respectively connected with the output end of the second comparator CO2 and the output end of the third comparator CO3, and the drain electrode of the M2 is connected with the battery 2. It should be understood that the isolation module including M1 and M2 is illustrated in fig. 4, and that the switching tubes in the isolation module may be replaced by other types of switching tubes.
The switching transistor according to the embodiment of the present application may be any switching transistor that can be turned on or off based on control, for example, an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), or a metal-oxide-semiconductor field effect transistor (Metal Oxide Semiconductor, MOS), or a triode, or a thyristor. The protection controller may include at least one switching tube therein. When the number of the switching tubes in the protection controller is plural, the types of the switching tubes may be different, for example, some of the switching tubes may be IGBTs, and the rest may be MOS.
The following describes the operation principle of the protection controller according to the circuit configuration shown in fig. 4:
the voltage at point a in fig. 4 is equal to the voltage V of the battery 1 bat1 The voltage at point B is equal to the voltage V of the battery 2 bat2 . Based on the basic principle of the differential amplifying circuit, the output end of the differential amplifier can output amplified differential voltage between the voltage at the point A and the voltage at the point B, namely amplified differential voltage V between the battery 1 and the battery 2 gap . Wherein V is gap Can be represented by the following formula one:
V gap ＝K(V B -V A )＝K(V bat2 -V bat1 ) Equation one
Wherein, the liquid crystal display device comprises a liquid crystal display device,
Figure BDA0002999633260000091
the basic principle and formula derivation of differential amplification circuits can be referred to the prior art. V (V) B Representing the voltage at point B, V A The voltage at point a is indicated.
Since the voltage of the battery 2 may be greater than or less than the voltage of the battery 1, the voltage of (V B -V A ) The result of (2) may be positive or negative. In order to facilitate the comparator circuit to compare the voltage difference between the battery 1 and the battery 2 with the voltage difference threshold, in the embodiment of the present application, a fourth resistor R4 and a fifth resistor R5 with equal resistance values may be set in the comparator circuit, and the voltage difference between the battery 1 and the battery 2 is calculated by B -V A ) The result of (a) is that the applied bias voltage is converted into positive voltage V ref In V ref Instead of V gap Comparison with a pressure differential threshold to characterize V gap The result is compared with the magnitude of the pressure difference threshold. Referring to FIG. 4, V ref Can be represented by the following formula two:
Figure BDA0002999633260000092
referring to FIG. 4, the sum of the voltages across the first resistor R1 and the second resistor R2 is V H I.e. the upper limit of the voltage threshold represented by the comparator circuit, the sum of the voltage across the second resistor R2 and the voltage across the third resistor R3 being V L I.e. the lower value of the voltage threshold characterized by the comparator circuit. Wherein V is H And V L Can be represented by the following formulas three and four, respectively:
Figure BDA0002999633260000093
Figure BDA0002999633260000094
the comparator circuit may set V ref Voltage threshold (V) L ，V H ). Wherein when the comparator circuit determines V L ≤V ref ≤V H At this time, V can be determined ref In the voltage threshold, the voltage difference representing the battery 1 and the battery 2 is less than or equal to the voltage difference threshold, and the comparator circuit can output the driving voltage V gate At a high level to turn on M1 and M2, thereby keeping battery 1 and battery 2 in parallel. When the comparator circuit determines V ref >V H Or V ref <V L At this time, V can be determined ref Outside the voltage threshold, which characterizes the voltage difference between battery 1 and battery 2 being greater than the voltage difference threshold, the comparator circuit may output V gate At a low level to shut down M1 and M2 and thereby isolate battery 1 from battery 2. In one embodiment, the high level of the comparator circuit (driver module) output may be regarded as a turn-on command indicating that the isolation module is turned on, i.e. the first MOS and the second MOS are turned on. The low level of the output of the comparator circuit (driving module) can be seen as an off command for indicating that the isolation module is off, i.e. that the first MOS and the second MOS are off.
It should be noted that in the second comparisonSupply voltage V of CO2 CC1 And a supply voltage V of a third comparator CO3 CC1 On the premise of fixing V H Related to the ratio of the sum of the resistance values of the first resistor R1 and the second resistor R2 to the sum of the resistance values of the first resistor R1, the second resistor R2 and the third resistor R3 L Is related to the ratio of the third resistor R3 to the sum of the resistance values of the first resistor R1, the second resistor R2 and the third resistor R3. In this embodiment of the present application, a worker may set resistance values of a first resistor R1, a second resistor R2, and a third resistor R3 in advance based on a differential pressure threshold that can be borne by a battery in a charging and discharging system, so as to implement the differential pressure threshold and "V H And V L "match".
In one embodiment, if the differential pressure threshold V safe 50mV, V CC1 When the voltage is 3.3V, the resistance values of the first resistor R1, the second resistor R2 and the third resistor R3 are equal, and are all 100 Ω, the resistance value of the sixth resistor R6 is 10 Ω, and the resistance value of the sixth resistor R6 is 220 Ω. Correspondingly, the upper limit value V in the voltage threshold of the comparator circuit H A lower limit value V in the voltage threshold of the comparator circuit of 2.2V L Is 1.1V.
Wherein, according to the formula II, the following formula V is obtained:
V ref ＝1.65V+0.5V gap formula five
The following formula six can be obtained according to the above formula one:
V gap ＝22(V B -V A ) Formula six
Combining the above formula five and formula six may yield the following formula seven:
V ref ＝1.65V+11(V B -V A ) Equation seven
In conclusion, when the voltage is less than or equal to-50 mV (V) B -V A ) Less than or equal to 50mV, i.e. V L (1.1V)≤V ref ≤V H When the voltage difference between the battery 1 and the battery 2 is less than or equal to the voltage difference threshold value, the comparator circuit can output a high level to conduct M1 and M2. When 50mV<(V B -V A ) I.e. VH<V ref Alternatively, when (V B -V A )<-50mV, i.e. V ref <V L The comparator circuit determines that the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold, and may output a low level, turning off M1 and M2.
In one embodiment, the voltage difference threshold that can be borne by the battery of the charging and discharging system does not correspond to the current threshold, and the operator sets the voltage difference threshold in advance, and when the voltage difference between the battery 1 and the battery 2 is the voltage difference threshold, the current value of the protection controller is greater than the current threshold that can be borne by the battery 1 or the battery 2, so that the battery 1 or the battery 2 can be damaged. Therefore, the operator needs to adjust the differential pressure threshold, which is the product of the current threshold that the battery 1 or the battery 2 can withstand and the resistance value of the protection controller. For example, the voltage differential threshold is 50mV, and when the voltage differential between battery 1 and battery 2 is 50mV, the current value of the protection controller 5A is greater than the current threshold 4A that battery 1 or battery 2 can withstand. The operator can therefore take the product of the current threshold 5A and the resistance of the protection controller, 40mV, as the differential pressure threshold.
In this embodiment of the application, when the pressure difference threshold is preset, the staff can consider the pressure difference threshold and the current threshold that can be born by the battery of the charging and discharging system, and then take the smaller pressure difference threshold as the pressure difference threshold of the battery 1 and the battery 2, so that the safety of the battery 1 and the battery 2 can be accurately protected.
In this embodiment of the present application, the protection controller may be composed of an isolation module, a sampling module and a driving module, where the sampling module may obtain the pressure difference between the battery 1 and the battery 2, and output the pressure difference to the driving module. The driving module can compare the pressure difference between the battery 1 and the battery 2 with the pressure difference threshold value, so as to control the connection or disconnection of the isolation module, and the purpose of realizing the connection and isolation of the battery 1 and the battery 2 can be achieved. Furthermore, during the production and manufacturing stage, the staff does not need to select the batteries with the same voltage in advance, and the protection controller in the charging and discharging system can isolate the battery 1 from the battery 2 when the pressure difference between the battery 1 and the battery 2 is large, so that the safety of the battery is protected, the battery is prevented from being damaged, the yield of the battery can be improved, the workload of the staff can be reduced, and the production line efficiency is improved.
Fig. 5A is a schematic structural diagram of a protection controller according to an embodiment of the present application. In one embodiment, the "sampling module and the driving module" in fig. 4 may be integrated together to form the voltage detection device. In one embodiment, the isolation module may be replaced with a switching tube and resistor. As shown in fig. 5A, the protection controller may include a voltage detection device, a switching tube, and a resistor. The first end of the voltage detection device can be connected with the first ends of the battery 1 and the switch tube respectively, the second end of the voltage detection device can be connected with the first ends of the battery 2 and the resistor, and the second end of the resistor can be connected with the second end of the switch tube.
The voltage detection device may have a voltage difference threshold value stored therein. The voltage detection device may detect the voltage of the battery 1 and the voltage of the battery 2, and thus obtain the voltage difference between the battery 1 and the battery 2. When the voltage detection device detects that the voltage difference between the battery 1 and the battery 2 is smaller than or equal to the voltage difference threshold value, the switch tube can be conducted, and the battery 1 and the battery 2 are kept in parallel. If the voltage detection device detects that the voltage difference between the battery 1 and the battery 2 is larger than the voltage difference threshold value, the switch tube can be opened to protect the battery 1 or the battery 2. In one embodiment, when the voltage detection device detects that the voltage difference between the battery 1 and the battery 2 is less than or equal to the voltage difference threshold, the voltage detection device may output a turn-on instruction to the isolation module (the switching tube and the resistor), where the turn-on instruction is used to instruct the isolation module to turn on, i.e. the switching tube to turn on. When the voltage detection means detects that the voltage difference between the battery 1 and the battery 2 is larger than the voltage difference threshold, the voltage detection means may output a disconnection instruction to the isolation module (switching tube and resistor) for instructing the isolation module to be disconnected, i.e., the switching tube to be disconnected.
In one embodiment, the voltage detection device may be a chip, which may integrate the voltage detection function and the voltage driving function.
The protection controller in the embodiment of the application can obtain the pressure difference between the battery 1 and the battery 2 by detecting the voltages of the battery 1 and the battery 2, so that the purpose of controlling the communication or isolation between the battery 1 and the battery 2 can be achieved.
Since the battery 1 and the battery 2 may generate a large-current mutual charging phenomenon when the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold, the current value of the current flowing through the protection controller also becomes large, and thus in one embodiment, the protection controller may determine whether the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold by detecting the current value of the protection controller, thereby controlling the connection or isolation of the battery 1 and the battery 2.
In one embodiment, a current detection function may be integrated in the protection controller, which may detect the current value of the protection controller when a worker installs the battery 1 and the battery 2. If the protection controller detects that the current value of the protection controller is smaller than or equal to the current threshold value, the protection controller can be conducted, and the battery 1 and the battery 2 are kept in parallel. If the protection controller detects that the current value of the protection controller is greater than the current threshold value, the protection controller can be disconnected to isolate the battery 1 from the battery 2 so as to protect the battery 1 or the battery 2. It should be appreciated that the current threshold value may be pre-stored in the protection controller. In one embodiment, the current threshold may correspond to a differential pressure threshold, which may be: the current value of the current flowing in the protection controller when the differential pressure of the battery 1 and the battery 2 is equal to the differential pressure threshold value.
Fig. 5B is another schematic structural diagram of the protection controller according to the embodiment of the present application. As shown in fig. 5B, in one embodiment, the protection controller may include a current detection device, a switching tube, and a resistor. The current detection device can be connected with the resistor in parallel, the first end of the current detection device can be connected with the second end of the switch tube, the second end of the current detection device can be connected with the battery 2, and the first end of the switch tube is connected with the battery 1.
Referring to fig. 5B, a current threshold value may be stored in the current detection device in advance, and the current detection device may detect a current value of the current flowing through the current detection device. When the current detection device detects that the current value of the current detection device is smaller than or equal to the current threshold value, the switch tube can be conducted, and the battery 1 and the battery 2 are kept in parallel connection. When the current detection device detects that the current value of the current detection device is larger than the current threshold value, the switch tube can be opened to protect the battery 1 or the battery 2. In one embodiment, when the current detection device detects that the current value of the current detection device is less than or equal to the current threshold value, the current detection device may output a conduction instruction to the isolation module (the switching tube and the resistor), where the conduction instruction is used to instruct the isolation module to conduct, i.e. the switching tube to conduct. When the current detection device detects that the current value of the current detection device is greater than the current threshold value, the current detection device may output an off command to the isolation module (the switching tube and the resistor), the off command being used to instruct the isolation module to be turned off, i.e., the switching tube to be turned off.
In one embodiment, the current sensor and the controller may be integrated to obtain a current detection device, and the current sensor is configured to detect a current value of a current flowing through the current detection device. The controller is used for controlling the conduction and the closing of the switching tube based on the current value detected by the current sensor. The controller can conduct the switching tube based on the fact that the current value detected by the current sensor is smaller than or equal to a current threshold value. The controller may open the switching tube based on the current value detected by the current sensor being greater than the current threshold.
In one embodiment, the "differential pressure between the battery 1 and the battery 2" and the "current value of the protection controller" detected by the protection controller may be replaced by "parameters", and the differential pressure threshold and the current threshold may be replaced by preset thresholds. The comparison of the differential pressure of the battery 1 and the battery 2 with the differential pressure threshold value and the comparison of the current value of the protection controller with the current threshold value by the protection controller can be understood as: the protection controller detects whether the parameter and a preset threshold meet preset conditions. In the above embodiment, when the parameter is a differential pressure, the differential pressure is smaller than or equal to a differential pressure threshold value, and when the parameter is a current value, the current value is smaller than or equal to a current threshold value.
The protection controller in the embodiment of the application can achieve the purpose of controlling the communication or isolation between the battery 1 and the battery 2 by detecting the current value, thereby achieving the technical effects described in the above embodiment.
In fig. 4, an example is illustrated in which the charge sub-module includes two voltage converters, the protection controller group includes 1 protection controller, and the battery group includes 2 batteries. In one embodiment, referring to FIG. 6, the charging electronics module may includeN voltage converters, N is an integer greater than or equal to 2. The protection controller group may include
Figure BDA0002999633260000121
And a protection controller. The battery pack may include N batteries. One voltage converter may correspond to one battery, and any two voltage converters of the N voltage converters correspond to one protection controller. The battery may be, but is not limited to, a lithium battery. In one embodiment, the structure of the charge electronic module, the discharge sub-module, and the protection controller group may be referred to as a charge-discharge control device. It should be understood that the charge and discharge system provided in the embodiments of the present application is applied to an electronic device having multiple batteries, and the multiple batteries may also be understood as multiple battery cells.
The input end of each voltage converter is connected with the input end of the discharging submodule. The output end of the first voltage converter is respectively connected with the first end of the first protection controller and the first battery, the output end of the second voltage converter is respectively connected with the second end of the first protection controller and the second battery, and the output end of the electronic discharging module is respectively connected with the second end of the first protection controller, the second battery and a load in the electronic equipment.
The first voltage converter and the second voltage converter may be any two converters of the N voltage converters, the first battery is a battery corresponding to the first voltage converter, the second battery is a battery corresponding to the second voltage converter, and the first protection controller is one protection controller of the protection controller group. In other words, the output end of any two voltage converters in the N voltage converters is connected to a protection controller, and the battery corresponding to the any two voltage converters is also connected to the protection controller. In one embodiment, the charge and discharge sub-modules are disposed on a motherboard, and the voltage converter in the charge sub-module, and the discharge sub-module are connected to the battery through a BTB-capable connector.
In one embodiment, the charge 1 in fig. 4 may be used as a first voltage converter, the charge 2 may be used as a second voltage converter, the battery 1 may be used as a first battery, the battery 2 may be used as a second battery, and the protection controller may be used as a first protection controller. It will be appreciated that for the first and second voltage converters, the outputs of the first and second voltage converters may be connected to a protection controller. In one embodiment, the first battery and the second battery are not included in the charge-discharge system, and the connection relationship between the first voltage converter, the second voltage converter, the protection controller, the first battery and the second battery is shown with reference to fig. 6.
The above embodiments describe the charge and discharge system provided in the embodiments of the present application, and in the manufacturing stage of the electronic device, the voltage difference between the battery 1 and the battery 2 may be detected, so as to conduct or isolate the battery 1 and the battery 2. In most cases, the voltage difference between the battery 1 and the battery 2 is small, and the charging and discharging system can conduct the battery 1 and the battery 2, so that when the electronic equipment is in a use stage of a user, the battery 1 and the battery 2 can be charged and discharged in parallel, and the balance of the battery 1, the battery 2 and the voltage is ensured. However, in special cases, the voltage difference between the battery 1 and the battery 2 is large, and the charge-discharge system can isolate the battery 1 from the battery 2 in order to ensure the safety of the battery 1 and the battery 2, but if the electronic device isolated by the battery 1 and the battery 2 reaches the use stage of the user, the battery 1 and the battery 2 are charged separately, so that the voltages of the battery 1 and the battery 2 are unbalanced. In order to ensure that the battery 1 and the battery 2 in the electronic device are conducted during the use period of the user, it is necessary to precharge the battery 1 and the battery 2 having a large voltage difference during the manufacturing period of the electronic device to reduce the voltage difference between the battery 1 and the battery 2 and conduct the battery 1 and the battery 2.
Fig. 7 is a schematic diagram of connection between the detection controller and the charge-discharge system in the production line. It should be understood that only the protection controller in the charge-discharge control system is shown in fig. 7. Referring to fig. 7, when a worker installs a battery, the worker may install the battery in a detection area in which a detection controller is provided. In one embodiment, the detection controller may be, but is not limited to, a micro control unit (microcontroller unit, MCU). When the electronic equipment is arranged in the detection area, one end of the detection controller can be connected with the output end of the second comparator CO2 in the protection controller, and the detection controller The other end of the controller may be connected to a display device. Wherein, for an electronic device, when a first battery is installed by a worker or a mechanical arm, the driving voltage V output by the driving module gate Is of low voltage. When a worker or a mechanical arm installs a second battery, if the pressure difference between the two batteries is larger than the pressure difference threshold value, the driving voltage V output by the driving module gate Is low voltage, if the pressure difference between the two batteries is smaller than or equal to the pressure difference threshold value, the driving voltage V output by the driving module gate Is a high voltage. In one embodiment, when the protection controller is connected to the MCU, it may be considered to output a low voltage to the MCU if the driving module outputs a low voltage, and may be considered to output a high voltage to the MCU when the driving module outputs a high voltage.
A detection controller for detecting two drive voltages V continuously output by the drive module in the protection controller of an electronic device gate . When the detection controller detects that the driving module outputs the low voltage for the first time and outputs the high voltage for the second time, it can be determined that the battery 1 and the battery 2 in the charge and discharge system are connected, that is, the pressure difference between the battery 1 and the battery 2 is less than or equal to the pressure difference threshold. When the detection controller detects that the driving module outputs low voltage for the first time and outputs low voltage for the second time, it is determined that the battery 1 and the battery 2 in the charge-discharge system are isolated, that is, the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold value, the detection controller can send prompt information to the display device, the prompt information indicates that the electronic device is abnormal (the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold value), and the battery 1 and the battery 2 need to be charged, so that the voltages of the battery 1 and the battery 2 are balanced. Referring to fig. 7, an exemplary display device may be a notebook computer, on which an identification of an abnormal electronic device, such as the electronic device 2, is displayed.
In this way, the worker can observe the electronic apparatus having the abnormality on the display device. Or, when receiving the prompt information, the display device may send an abnormality message to the mechanical arm, where the abnormality message is used to indicate that the currently installed electronic device is abnormal. In order to balance the voltages of the battery 1 and the battery 2 mounted in the electronic device, a worker or a robot arm may place an abnormal electronic device in which the battery 1 and the battery 2 are mounted in a charging area to individually charge a low-voltage battery in the electronic device so that the voltages of the two batteries reach the balance. During the process of charging the low-voltage battery, the voltage difference between the battery 1 and the battery 2 gradually decreases. The protection controller may detect a voltage difference between the battery 1 and the battery 2, and may communicate the battery 1 and the battery 2 when the voltage difference between the battery 1 and the battery 2 is less than or equal to the voltage difference. The battery 1 and the battery 2 are connected in parallel, and discharge is performed simultaneously, and the voltages in the battery 1 and the battery 2 are always balanced.
The above embodiments teach that, in the manufacturing stage of the electronic device, the charging and discharging system in the embodiment of the present application is adopted, so that it is not necessary to select the batteries with the same voltage, and the safety of the batteries can be also protected when the voltage difference is large. Since the charge-discharge system can turn on the battery 1 and the battery 2 at the manufacturing stage of the electronic device, the voltages in the battery 1 and the battery 2 are balanced. In use by a user, because the voltages in battery 1 and battery 2 are balanced, the charge-discharge system can still turn on battery 1 and battery 2 when the electronic device is in a charging mode, and both charge 1 and charge 2 are battery 1 and battery 2, with a fast charging speed, particularly with reference to the following related description.
Based on the charge and discharge system provided in the embodiments of the present application, referring to fig. 8, in one embodiment, because the manufacturing stage of the electronic device, the battery 1 and the battery 2 may be connected, and voltage balance of the battery 1 and the battery 2 is ensured. Therefore, when the user charges the electronic device, that is, when the electronic device is in the charging mode, because the voltage difference between the battery 1 and the battery 2 is less than or equal to the voltage difference threshold value, the protection controller may control the switching transistors (e.g., M1 and M2) in the protection controller to be turned on to connect the battery 1 and the battery 2, so that the battery 1 and the battery 2 are connected in parallel. When the battery 1 and the battery 2 are connected in parallel, the charge 1 can charge the battery 1 and the battery 2, the charge 2 can charge the battery 1 and the battery 2, the charging current of the battery 1 and the charging current of the battery 2 are both from the charge 1 and the charge 2, and the charging current of the battery 1 and the charging current of the battery 2 are the same, so that the purpose of balancing the differential pressure can be achieved. In addition, the battery 1 and the battery 2 can be charged at the same charging current while being charged at a faster rate.
According to the charging and discharging system, when the electronic equipment is in the charging mode, the protection controller can control the switching tube in the protection controller to be conducted so as to be communicated with the battery 1 and the battery 2, and the purpose of balancing the pressure difference between the charging of the battery 1 and the charging of the battery 2 can be achieved. In addition, battery 1 and battery 2 intercommunication, and battery 1 and battery 2 can be through putting electronic module and for the load power supply when charging, and then realize charging and discharging simultaneously, and the discharge performance of the charge-discharge system in this application embodiment is good. When the electronic device is in a charging mode and heavy load discharge exists in the electronic device, the battery 1, the battery 2 and the discharging submodule supply power for the heavy load, and the battery 1 and the battery 2 discharge together, so that the pressure difference balance of the battery 1 and the battery 2 can be ensured.
When the electronic equipment is in a discharging mode, namely the electronic equipment is not connected with a power supply, the protection controller can control the switching tube in the protection controller to be conducted so that the battery 1 and the battery 2 can supply power to loads in the electronic equipment at the same time, and voltage balance of the battery 1 and the battery 2 can be further ensured. In this embodiment of the present application, because when the electronic device is in the charging mode, the voltages of the battery 1 and the battery 2 reach balance, when the electronic device is switched from the charging mode to the discharging mode, for example, when the user pulls out the charger, there is no pressure difference between the battery 1 and the battery 2, or the pressure difference is small, no phenomenon of transient heavy current mutual charging is generated, and the safety of the battery is improved.
Fig. 9 is a schematic charging diagram of the charge and discharge system shown in fig. 8 when the charge and discharge system fails. In the charge and discharge system provided in the embodiment of the present application, when the electronic device is in the charge mode, the protection controller communicates with the battery 1 and the battery 2. Therefore, if the charge 1 fails, the charge 1 cannot charge the battery 1, but since the charge 2 is connected to the battery 1, the charge 2 can charge the battery 1, and normal charging of the battery 1 can be ensured.
In the charge-discharge system provided by the embodiment of the application, the charge-discharge systems are in a backup relationship, if one charge has a fault, the battery can be charged by adopting other charge, the working mode of the charge is more flexible, and the normal charge-discharge of the battery can be ensured.
After the electronic device is used for a long time, if the service time of the electronic device is longer than the third preset time, the battery 1 and the battery 2 may be aged to different degrees, and the impedance inside the battery 1 and the battery 2 may be increased. Illustratively, the third predetermined time period may be 1 year. According to the charge-discharge system shown in fig. 1, when the electronic device is in the charge mode, if the impedance inside the battery 2 is large, the charge current of the battery 2 is small, the charge current of the battery 1 is large, and a bias current phenomenon occurs, so that the current of the protection controller is increased, and the battery safety problem is caused.
According to the charging and discharging system provided by the embodiment of the application, when the electronic equipment is in the charging mode, the protection controller can control the conduction of the M1 and the M2 so as to be communicated with the battery 1 and the battery 2, and the purpose of balancing the pressure difference of charging the battery 1 and the battery 2 can be achieved. In this embodiment of the present application, if the battery ages, the protection controller may detect that the current value of the protection controller is greater than the current threshold, then the battery 1 and the battery 2 may be isolated, and the safety of the battery 1 and the battery 2 may be protected, and the specific principle may be referred to the related description of the above embodiment.
Referring to fig. 10, the embodiment of the present application further provides an electronic device 100, where the electronic device 100 may include a first battery, a second battery, and the charge and discharge system described in the foregoing embodiment, and the electronic device 100 in the embodiment of the present application has the same technical effects as the foregoing charge and discharge system. The first battery may be battery 1 and the second battery may be battery 2, with battery 1 and battery 2 being illustrated in fig. 10.
In one embodiment, a load may be included in the electronic device 100. The first and second batteries, and the charge-discharge system may be referred to as a power module of the electronic device 100, to power a load in the electronic device 100. By way of example, the load may be, but is not limited to being, a processor, memory, sensors, etc., and is not shown in fig. 10.
The term "plurality" herein refers to two or more. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship; in the formula, the character "/" indicates that the front and rear associated objects are a "division" relationship.
It will be appreciated that the various numerical numbers referred to in the embodiments of the present application are merely for ease of description and are not intended to limit the scope of the embodiments of the present application. It should be understood that, in the embodiments of the present application, the sequence number of each process described above does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Claims (14)

1. A protection controller for an electronic device, the electronic device comprising a first voltage converter, a second voltage converter, a first battery and a second battery, the first voltage converter and the second converter having inputs connected to a power source, characterized in that the protection controller is configured to be connected to the first battery and the second battery;
the protection controller is used for detecting parameters;
in response to the parameter not meeting a preset condition with a preset threshold, disconnecting the first battery and the second battery, so that the first battery and the second battery are not connected in parallel;
in response to the parameter and the threshold meeting the preset condition, communicating the first battery and the second battery, and connecting the first battery and the second battery in parallel;
if the parameter is a pressure difference between the first battery and the second battery, the protection controller includes: a voltage detection device and an isolation module; the voltage detection device includes: the input end of the sampling module is connected with the output end of the first voltage converter, the output end of the second voltage converter, the first battery, the second battery and the isolation module respectively, the output end of the sampling module is connected with the input end of the driving module, and the output end of the driving module is connected with the isolation module;
The sampling module is used for detecting the pressure difference and outputting the pressure difference to the driving module;
the driving module is used for:
outputting a disconnection instruction to the isolation module in response to the pressure difference and a preset threshold not meeting a preset condition;
outputting a conduction instruction to the isolation module in response to the pressure difference and a preset threshold meeting a preset condition;
the isolation module is used for:
disconnecting based on the disconnection instruction to disconnect the connection between the first battery and the second battery;
conducting based on the conducting instruction to connect the first battery and the second battery;
the isolation module includes a switch, the switch including: a first switching tube and a second switching tube;
the output end of the driving module is respectively connected with the first end of the first switching tube and the first end of the second switching tube, the second end of the first switching tube is respectively connected with the first battery and the input end of the sampling module, the third end of the first switching tube is connected with the second end of the second switching tube, and the third end of the second switching tube is respectively connected with the second battery and the input end of the sampling module.
2. The protection controller of claim 1, wherein the threshold is a differential pressure threshold and the preset condition is that the differential pressure is less than or equal to the differential pressure threshold.
3. The protection controller according to claim 2, wherein the driving module is specifically configured to:
outputting a low level to the isolation module in response to the differential pressure being greater than the differential pressure threshold, the low level being used to characterize the disconnect command;
and outputting a high level to the isolation module in response to the pressure difference being less than or equal to the pressure difference threshold, wherein the high level is used for representing the on instruction.
4. A protection controller according to claim 3, wherein the sampling module is a differential amplifying circuit.
5. A protection controller according to claim 3, wherein the drive module is a comparator circuit.
6. The protection controller of claim 1, wherein the first switching tube and the second switching tube are both field effect tube MOS.
7. The protection controller of claim 1, wherein if the parameter is a current value of the protection controller, the threshold is a current threshold, and the preset condition is that the current value is less than or equal to the current threshold.
8. The protection controller of claim 7, wherein the protection controller comprises: a current detection device and an isolation module; the current detection device is respectively connected with the first battery, the second battery and the isolation module, and the isolation module is respectively connected with the first battery and the second battery;
the current detection device is used for:
detecting the current value;
outputting a disconnect command to the isolation module in response to the current value being greater than the current threshold;
outputting a turn-on instruction to the isolation module in response to the current value being less than or equal to the current threshold;
the isolation module is used for:
disconnecting based on the disconnection instruction to disconnect the connection between the first battery and the second battery;
and conducting based on the conducting instruction so as to communicate the first battery and the second battery.
9. The protection controller of any one of claims 1-6, wherein the drive module is configured to connect with a micro-processing unit, MCU, connected with a display device;
the driving module is further used for:
outputting the low level to the MCU in response to the differential pressure being greater than the differential pressure threshold, and outputting the high level to the MCU in response to the differential pressure being less than or equal to the differential pressure threshold for instructing the MCU to send a prompt message to the display device.
10. An electronic device, comprising: a first battery, a second battery and a charge-discharge system, the system comprising the protection controller of any one of claims 1-9.
11. The electronic device of claim 10, wherein the system further comprises: the output end of the first voltage converter is connected with the first battery and the protection controller respectively, the output end of the second voltage converter is connected with the second battery and the protection controller respectively, and the input end of the first voltage converter is connected with the input end of the second voltage converter;
when the system is in a charging mode and the protection controller is communicated with the first battery and the second battery, the first voltage converter is used for charging the first battery and the second battery, and the second voltage converter is used for charging the first battery and the second battery.
12. The electronic device of claim 11, wherein the electronic device further comprises: a load, the system further comprising: the input end of the discharging module is connected with the input end of the first voltage converter and the input end of the second voltage converter respectively, and the output end of the discharging module is connected with the second battery, the protection controller and the load respectively;
When the system is in a charging mode and the protection controller is communicated with the first battery and the second battery, the discharging submodule, the first battery and the second battery supply power for the load;
when the system is in a charging mode and the protection controller disconnects the first battery and the second battery, the discharging submodule and the second battery both supply power to the load.
13. The electronic device of claim 12, wherein the electronic device comprises a memory device,
when the system is in a discharging mode and the protection controller is communicated with the first battery and the second battery, the first battery and the second battery supply power for the load;
the second battery supplies power to the load when the system is in a discharge mode and the protection controller disconnects the first battery and the second battery.
14. The electronic device of any of claims 11-13, wherein the first voltage converter and the second voltage converter are each a charge pump.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113890126B (en) * 2021-03-30 2023-06-27 荣耀终端有限公司 Protection controller applied to electronic equipment and electronic equipment
CN117134440A (en) * 2023-01-16 2023-11-28 荣耀终端有限公司 Battery protection circuit, battery protection board and electronic equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110729788A (en) * 2019-10-24 2020-01-24 深圳市道通智能航空技术有限公司 Power supply control method, system and equipment
WO2020197363A1 (en) * 2019-03-28 2020-10-01 Samsung Electronics Co., Ltd. Power circuit and electronic device including the same
CN211830259U (en) * 2020-03-02 2020-10-30 辉芒微电子（深圳）有限公司 Battery reverse connection preventing equalization circuit for charging multiple batteries

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI448043B (en) * 2011-07-19 2014-08-01 Changs Ascending Entpr Co Ltd Battery module parallel protection protection device
DE102011121934A1 (en) * 2011-12-22 2013-06-27 Andreas Stihl Ag & Co. Kg Protection circuit for a battery pack
KR20160097637A (en) * 2015-02-09 2016-08-18 (주)브이엠이코리아 Apparatus for Controlling Secondary Cell Battery for Next Generation Eco-friendly Vehicle
CN107425593A (en) * 2017-08-09 2017-12-01 辽宁省肿瘤医院 Multivoltage battery parallel circuit
JP7009915B2 (en) * 2017-10-27 2022-01-26 株式会社デンソー Power storage system
CN208638069U (en) * 2018-08-29 2019-03-22 中国科学院上海高等研究院 Parallel connection device of battery packs
CN210517777U (en) * 2019-09-25 2020-05-12 深圳奥简科技有限公司 Battery protection circuit and battery charging and discharging system
CN113890126B (en) * 2021-03-30 2023-06-27 荣耀终端有限公司 Protection controller applied to electronic equipment and electronic equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020197363A1 (en) * 2019-03-28 2020-10-01 Samsung Electronics Co., Ltd. Power circuit and electronic device including the same
CN110729788A (en) * 2019-10-24 2020-01-24 深圳市道通智能航空技术有限公司 Power supply control method, system and equipment
CN211830259U (en) * 2020-03-02 2020-10-30 辉芒微电子（深圳）有限公司 Battery reverse connection preventing equalization circuit for charging multiple batteries

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