CN113890126A

CN113890126A - Protection controller applied to electronic equipment and electronic equipment

Info

Publication number: CN113890126A
Application number: CN202110342486.7A
Authority: CN
Inventors: 曹雷; 周海滨; 邱钰鹏
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-01-04
Anticipated expiration: 2041-03-30
Also published as: CN113890126B; WO2022206394A1

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 to: detecting a parameter, wherein the parameter is the voltage difference between the first battery and the second battery or the current value of the protection controller; in response to the parameter and the preset threshold not meeting the preset condition, disconnecting the first battery and the second battery; and communicating the first battery and the second battery to enable the first battery and the second battery to be connected in parallel in response to the preset condition of the parameter and the threshold value. In the embodiment of the application, in the production and manufacturing stage of the electronic equipment, the staff does not need to select the batteries with the same voltage in advance, the protection controller can protect the safety of the batteries based on the parameters between the batteries, the damage to the batteries is avoided, the yield of the batteries can be improved, the workload of the staff is reduced, and the production line efficiency is improved.

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 charging the electronic equipment by the power supply is as follows: the power supply charges a battery in the electronic device. When a user uses the electronic device, the battery discharges to 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 two batteries are connected in parallel.

In the manufacturing stage of the electronic device, a worker needs to mount a battery on the electronic device. Since batteries are discharged to different degrees after their production, the voltages of the batteries are different even in the case of batteries produced in the same batch. When a worker installs batteries, because the batteries are connected in parallel, if the voltage of the batteries has large differential pressure, circulation current can be caused, a large-current mutual charging phenomenon is generated between the batteries connected in parallel, and the batteries are burnt out.

Disclosure of Invention

The embodiment of the application provides a protection controller and electronic equipment for electronic equipment, and can improve production line efficiency.

In a first aspect, an embodiment of the present application provides a protection controller applied to an electronic device, where the electronic device includes a first battery and a second battery, and the protection controller is configured to be connected to the first battery and the second battery. Wherein the protection controller is to: detecting a parameter, wherein the parameter is a voltage difference between the first battery and the second battery or a current value of the protection controller; in response to the parameter and a preset threshold not meeting a preset condition, disconnecting the first battery and the second battery; and communicating the first battery and the second battery to enable the first battery and the second battery to be connected in parallel in response to the preset condition that the parameter and the threshold value are met.

Wherein, the parameter and the preset threshold value which do not satisfy the preset condition can be understood as: the size of the parameter and the preset threshold does not satisfy the preset condition, and the preset condition may be that the preset threshold is greater than the parameter, or that the preset threshold is greater than or equal to the parameter. In the embodiment of the application, in the production and manufacturing stage of the electronic equipment, the staff does not need to select the batteries with the same voltage in advance, but the protection controller protects the safety of the batteries based on the parameters, avoids the damage of the batteries, can improve the yield of the batteries, reduces the workload of the staff and improves the production line efficiency.

In a possible implementation manner, the parameter is the differential pressure, 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. Since the differential pressure may be converted to a product of a current value and a resistance value of the protection controller, in one possible implementation, 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. In one possible implementation, the differential pressure threshold set in the embodiment of the present application may be less than or equal to "the product of the current threshold and the protection controller resistance value".

The following describes the structure of the protection controller from two aspects:

one is as follows: the parameter is the differential pressure, 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. In one possible implementation, the protection controller includes: the voltage 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 voltage detection device is configured to: detecting the pressure difference; in response to the pressure differential being greater than the pressure differential threshold, outputting a disconnect command to the isolation module; outputting a conduction command to the isolation module in response to the differential pressure being less than or equal to the differential pressure threshold. The isolation module is configured to: 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 to communicate the first battery and the second battery. In one embodiment, the voltage detection device 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 differential pressure and the differential pressure threshold value so as to realize disconnection and connection of the first battery and the second battery. Furthermore, in 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 first battery and the second battery when the first battery and the second battery are connected, the safety of the batteries is protected, the batteries are prevented from being damaged, 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 apparatus includes: sampling module and drive module, sampling module's input respectively with first battery the second battery, and the isolation module is connected, sampling module's output with drive module's input is connected, drive module's output with the isolation module is connected. Wherein the sampling module is configured to: detecting the differential pressure, and outputting the differential pressure to the driving module. The driving module is used for: in response to the differential pressure being greater than the differential pressure threshold, outputting a low level to the isolation module, the low level being indicative of the disconnect command; and responding to the differential pressure being smaller than or equal to the differential pressure threshold value, and outputting a high level to the isolation module, wherein the high level is used for representing the conduction instruction. In one embodiment, the sampling module and the driving module may be both separately present in the form of a chip or a circuit.

In this application embodiment, the protection controller may be composed of an isolation module, a sampling module, and a driving module, and the sampling module may acquire a differential pressure between the first battery and the second battery and output the differential pressure to the driving module. The driving module can compare the pressure difference between the first battery and the second battery and the pressure difference threshold value, and then control the isolation module to be switched on or switched off, so that the connection and disconnection of the first battery and the second battery can be realized, and further the purpose of improving the production line efficiency can be achieved.

In one possible implementation manner, the isolation module may include a switch, and the isolation module may be turned on and off by the switch to disconnect or connect the first battery and the second battery.

In one possible implementation, the switch includes: the first switch tube and the second switch tube; the output of drive module respectively with the first end of first switch tube, and the first end of second switch tube is connected, the second end of first switch tube respectively with first battery, and the input of sampling module is connected, the third end of first switch tube with the second end of second switch tube is connected, the third end of second switch tube respectively with the second battery, and the input of sampling module is connected. In a possible implementation manner, the first switching tube and the second switching tube are both field effect transistors MOS.

In one possible implementation, the sampling module is a differential amplification circuit. In one possible implementation, the driving module is a comparator circuit. It should be understood that the sampling module may be other types of circuits for obtaining a differential pressure between the first battery and the second battery, and the driving module may be other types of circuits for comparing the differential pressure to a differential pressure threshold.

The second step is as follows: the parameter is a current value of a 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: the device 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.

In this possible implementation, the current detection device is configured to: detecting the current value; outputting a disconnection instruction to the isolation module in response to the current value being greater than the current threshold; and responding to the current value smaller than or equal to the current threshold value, and outputting a conduction instruction to the isolation module. The isolation module is configured to: 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 to communicate the first battery and the second battery. In one embodiment, the current detection device 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 comprise a switch, as described above in relation thereto.

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 relation between the current value of the protection controller and the current threshold value, so that disconnection and connection of the first battery and the second battery are achieved, and the purpose of improving production line efficiency can be achieved.

Generally, in the production and manufacturing stage of the electronic device, the voltage difference between the first battery and the second battery is small, and the protection controller can 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 breaks the connection between the first battery and the second battery, if the electronic device with disconnected batteries reaches the use stage of a user, the first battery and the second battery are separately charged, so that the voltages of the first battery and the second battery are unbalanced. In order to ensure that the first battery and the second battery in the electronic device are conducted during the user using stage, it is necessary to pre-charge the first battery and the second battery with a large voltage difference during the production and manufacturing stage of the electronic device to reduce the voltage difference between the first battery and the second battery and conduct the first battery and the second battery.

In one possible implementation manner, the driving module is configured to be connected with a micro processing unit (MCU), and the MCU is connected with a display device. The driving module is further configured to: and responding to the pressure difference being larger than the pressure difference threshold value, outputting the low level to the MCU, and responding to the pressure difference being smaller than or equal to the pressure difference threshold value, outputting the high level to the MCU for indicating the MCU to send prompt information to the display device.

In this possible implementation, since the protection controller may detect two times of differential pressure of the first battery and the second battery during the installation of the batteries, the MCU may determine the differential pressure between the first battery and the second battery based on the levels 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, the first battery and the second battery can be determined to be communicated, namely the differential pressure of the first battery and the second battery is smaller than or equal to the differential pressure threshold. When the MCU detects that the driving module outputs low voltage for the first time and outputs low voltage for the second time, the voltage difference between the first battery and the second battery is determined to be larger than the voltage difference threshold value, the MCU can send prompt information through the display device, and the display device can output the prompt information to prompt a worker to pre-charge the battery with lower voltage in the first battery and the second battery so as to ensure the voltage balance of the first battery and the second battery.

In a second aspect, an embodiment of the present application provides an electronic device, which may include a first battery, a second battery, and a charging and discharging system. The system includes the first aspect, and the protection controller in each possible implementation manner, and has the same technical effect as the first aspect, and specifically, reference may be made to the above description.

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 manner, when the system is in a charging mode and the protection controller communicates 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, because the first voltage converter can charge the first battery and the second battery, the second voltage converter can also charge the first battery and the second battery, the charging current of the first battery and the charging current of the second battery are from the first voltage converter and the second voltage converter, and the charging current of the first battery and the charging current of the second battery are the same, 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, can be fully charged at the same time, and is high in charging speed.

In addition, when the first voltage converter fails, the second voltage converter can charge the first battery, and the problem that the first battery cannot be charged when the voltage converter corresponding to the first battery fails is solved. The embodiment of the application has multiple charging modes.

In one possible implementation, the electronic device further includes: a load, the system further comprising: and the input end of the discharge submodule 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 discharge submodule 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 are all used for supplying power to the load. When the system is in a charging mode and the protection controller disconnects the first battery and the second battery, the discharge submodule and the second battery both supply power to the load.

In the embodiment of the application, when the protection controller is communicated with the first battery and the second battery, the first battery and the second battery are both supplied with power by the load, and the discharging performance is good.

In a possible implementation manner, when the system is in a discharging mode and the protection controller communicates the first battery and the second battery, the first battery and the second battery both supply power to the load. When the system is in a discharge mode and the protection controller disconnects the connection between the first battery and the second battery, the second battery supplies power to the load.

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 discharge in parallel, so that voltage balance between the first battery and the second battery can 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 to: detecting a parameter, wherein the parameter is the voltage difference between the first battery and the second battery or the current value of the protection controller; in response to the parameter and the preset threshold not meeting the preset condition, disconnecting the first battery and the second battery; and communicating the first battery and the second battery to enable the first battery and the second battery to be connected in parallel in response to the preset condition of the parameter and the threshold value. In the embodiment of the application, in the production and manufacturing stage of the electronic equipment, the staff does not need to select the batteries with the same voltage in advance, the protection controller can protect the safety of the batteries based on the parameters of the batteries, the batteries are prevented from being damaged, the yield of the batteries can be improved, the workload of the staff is reduced, and the production line efficiency is improved.

Drawings

Fig. 1 is a schematic structural diagram of a charging and discharging system in a conventional electronic device;

FIG. 2 is a schematic diagram of a conventional charging of an electronic device;

fig. 3 is a schematic structural diagram of a charge and discharge system according to an embodiment of the present application;

fig. 4 is another schematic structural diagram of a charge and discharge system according to an embodiment of the present application;

fig. 5A is a schematic structural diagram of a protection controller according to an embodiment of the present application;

fig. 5B is a schematic structural diagram of a protection controller according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another protection controller according to an embodiment of the present application;

FIG. 7 is a schematic diagram of the connection between the detection controller and the charging/discharging system on the production line;

fig. 8 is a schematic diagram of a charging system according to an embodiment of the present disclosure;

FIG. 9 is a schematic diagram of charging in the event of a failure in the charging and discharging system shown in FIG. 8;

fig. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Description of reference numerals:

m1 — first MOS;

m2-second MOS;

r1 — first resistance;

r2 — second resistance;

r3 — third resistance;

r4-fourth resistor;

r5-fifth resistor;

r6-sixth resistance;

r7 — seventh resistor;

r8 — eighth resistance;

r9 — ninth resistor;

RL-load resistance;

CO1 — first comparator;

CO2 — second comparator;

CO3 — third comparator.

Detailed Description

Fig. 1 is a schematic structural diagram of a charging and discharging system in a conventional electronic device. As shown in fig. 1, the charge and discharge system includes: a charge and discharge control device and a battery pack. The charging and discharging control device is arranged on a main board of the electronic equipment, and the battery pack can be connected with the charging and discharging control device on the main board through a Board To Board (BTB) connector. The charge and 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 the charge pump 1 and the charge pump 2 in the charge and discharge control device are used to charge the battery pack. The charge and discharge control device further includes: the discharge sub-module is a structure in which a charge 3 is connected to a discharge circuit, a charge 3 is connected to a discharge circuit, and a charge 3 is connected to a discharge circuit. And the discharging submodule is used for supplying power to a load in the electronic equipment and also can be used for charging the battery pack. The load in the electronic device may be a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), or the like in the electronic device. Because the power of the charge 3 in the discharge submodule is small, the discharge submodule contributes less to charging the battery pack, and for convenience of understanding, the following embodiments take the process of teaching the charge 1 and the charge 2 to charge the battery pack as an example. The battery pack may include a battery 1 and a battery 2. It should be understood that the illustration shows a charge as C, such as C1 for charge 1, C2 for charge 2, and C3 for 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 respectively connected with the battery 1 and the battery 2, the output end of the charge 2 is respectively connected with the battery 1 and the battery 2, and the output end of the discharging submodule is respectively connected with the battery 1 and the battery 2 and a load of the electronic device. For example, as shown in fig. 2, the electronic device is connected to a power supply through a charger, and the input terminal of the charge 1, the input terminal of the charge 2, and the input terminal of the discharge submodule are all connected to the charger, and the electronic device is taken as a mobile phone in fig. 2 for illustration. The charger may convert the supply voltage to a low voltage input to charge 1, charge 2, and the discharge sub-modules. The charger1 can convert the voltage input by the charger into the charging voltage required by the battery 1 and input the charging voltage to the battery 1 and the battery 2. The charger2 can convert the voltage input by the charger into the charging voltage required by the battery 2 and input the charging voltage to the battery 1 and the battery 2. And the discharging submodule can supply power to the load by adopting the voltage input by the charger. The battery 1 and the battery 2 can also supply power to the load through the discharging submodule, and accordingly, when the electronic equipment is in a charging mode, charging and discharging can be achieved. It should be understood that the electronic device being in the charging mode may be understood as: the electronic device is connected with a power supply, and the power supply provides voltage to the charge. The electronic device being in the discharge mode may be understood as: the electronic device is not connected to a power supply, and the battery 1 and the battery 2 supply power to a load.

Based on the structure shown in fig. 1, in the manufacturing stage of 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 and discharge control device. Since the battery is naturally discharged after being produced, the voltage may vary from battery to battery. Since 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 these, 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 battery 1 and the battery 2 is large, the high voltage battery charges the low voltage battery with a large current, which causes a battery safety problem, such as burning out the low voltage battery. Therefore, in the prior art, before connecting the battery to the main board, the staff need to select the battery with the same voltage for installation, so as to ensure the safety of the battery, but this undoubtedly increases the workload of the staff and reduces the production line efficiency.

The charging and discharging system for multiple batteries provided in the embodiments of the present application is described below with reference to specific embodiments, and the charging and discharging system in the embodiments of the present application is applied to electronic devices. The electronic device may be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a wearable device, an intelligent household appliance, an internet of things (IoT) device, and the like having a multi-battery parallel structure. The form of the electronic device in the embodiment of the present application is not particularly limited. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

Fig. 3 is a schematic structural diagram of a charging and discharging system according to an embodiment of the present disclosure, where the charging and discharging system is connected to a battery pack through a BTB connector. The battery pack includes 2 cells, cell 1 and cell 2 respectively. Referring to fig. 3, the charge and discharge system includes: the protection controller comprises a charging submodule, a discharging submodule and a protection controller group. The charging submodule may include 2 voltage converters. In one embodiment, the voltage converter may be any component provided with a "converting one voltage value to another voltage value (DC-DC)" in a DC circuit. For example, the voltage converter may be a charge pump, and the charge may exist in the form of a chip, and the voltage converter is described as the charge in the following embodiments. Referring to fig. 3, the charging submodule may include a charge 1 and a charge 2. The protection controller group comprises a 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 submodule of which can be referred to the associated description of 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 loads in the electronic equipment.

And the protection controller can acquire the voltage difference between the battery 1 and the battery 2. In an embodiment, a voltage detection function may be integrated in the protection controller, and the protection controller may detect the voltage of the battery 1 and the voltage of the battery 2, so as to obtain the voltage difference between the battery 1 and the battery 2. Wherein the voltage of the battery 1 may be V_bat1The 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 the point a may be used to represent the voltage of the battery 1, and the voltage at the point B may be used to represent the voltage of the battery 2 in the embodiment of the present application. The protection controller can detect the voltage of the point A and the electricity of the point BThe voltages are respectively the voltage of the battery 1 and the voltage of the battery 2, and the protection controller can acquire the voltage difference between the battery 1 and the battery 2.

In one embodiment, because the charge is charged by adjusting the charging voltage input to the battery according to the voltage of the battery, the protection controller may adjust the voltage V output by the charge 1 in a scenario where the power supply charges the electronic device_out1As the voltage of battery 1, voltage V output from charger2_out2As 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 to obtain the voltage difference between the battery 1 and the battery 2.

In one embodiment, the protection controller is pre-stored with a differential pressure threshold V_safeThe differential pressure threshold may be understood as a maximum differential pressure threshold that the charging and discharging system can withstand (or a maximum differential pressure threshold that a battery in the charging and discharging system can withstand). When the worker installs the

batteries

1 and 2, the protection controller may detect the voltage at the point a and the voltage at the point B to obtain the voltage difference between the

batteries

1 and 2. If the protection controller detects that the differential pressure between the battery 1 and the battery 2 is smaller than or equal to the differential pressure 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 differential pressure between the battery 1 and the battery 2 is greater than the differential pressure threshold value, 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 are mutually charged by large current due to the differential pressure is avoided, and the battery 1 or the battery 2 is damaged. It is to be understood that isolating battery 1 and battery 2 can be understood as: the connection between the

batteries

1 and 2 is broken. The

connected batteries

1 and 2 are connected in parallel.

In one embodiment, the protection controller may monitor the differential voltage across battery 1 and battery 2 (or the current of the protection controller) in real time. In one embodiment, the protection controller may periodically obtain the voltage difference between the batteries 1 and 2 (or the current of the protection controller). For example, the protection controller may acquire the voltage difference between the battery 1 and the battery 2 every first preset time period, which may be 10 ms.

In the manufacturing stage of the electronic device, the protection controller may adopt the technical solution described above in this application to obtain the voltage difference between the battery 1 and the battery 2 to protect the battery 1 and the battery 2. For example, if the differential pressure threshold is 0.5V, the worker first installs the battery 1, and the protection controller detects the voltage at point a, i.e., V_bat1At 4V, the protection controller detects the voltage at point B, i.e., V_bat20V. 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, isolates the battery 1 from the battery 2 in advance. When the staff installs the battery 2, the protection controller detects the voltage V of the point B_bat24.1V, the protection controller determines that the differential pressure between battery 1 and battery 2 is less than the differential pressure threshold, and the protection controller may communicate battery 1 and battery 2.

In the embodiment of the application, the protection controller is arranged in the charging and discharging system of the electronic equipment, the protection controller can detect the pressure difference between the batteries, and then when the pressure difference between the batteries is greater than a pressure difference threshold value, the batteries are isolated, the phenomenon of mutual charging of large currents between the batteries is avoided, and the safety of the batteries is protected. Similarly, the protection controller may determine a voltage difference between the batteries by detecting a current value of the protection controller, and then isolate the batteries when the voltage difference is greater than a voltage difference threshold. Therefore, the charging and discharging system in the embodiment of the application is arranged in the electronic device, in the production and manufacturing stage, a worker does not need to select batteries with the same voltage in advance, and the protection controller in the charging and discharging system can protect the safety of the batteries based on the pressure difference between the batteries, avoid the damage of the batteries, improve the yield of the batteries, reduce the workload of the worker and improve the production line efficiency.

The structure of the protection controller will be described below.

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 to the output terminal of charge 1 and battery 1, and is also connected to the output terminal of charge 2 and 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 voltage difference between the battery 1 and the battery 2 and outputting the voltage difference to the driving module. And the driving module is used for comparing the pressure difference with a pressure difference threshold value. 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 to keep the battery 1 and the battery 2 in parallel connection. If the driving module determines that the differential pressure between the battery 1 and the battery 2 is greater than the differential pressure threshold, the driving isolation module is disconnected to isolate the battery 1 from the battery 2 and protect the battery 1 from the battery 2. And the isolation module is used for realizing the isolation and conduction of the battery 1 and the battery 2.

In one embodiment, the sampling module and the driving module may be chips. The sampling chip can be integrated with a voltage detection function and a calculation function, the driving chip can be pre-stored with a differential pressure threshold value, and the driving chip can be integrated with a voltage driving function so as to drive the isolation module to be disconnected and connected. In one embodiment, the isolation module includes a switch, and the switching of the switch can realize the opening and closing of the isolation module.

In one embodiment, the sampling module may be a differential amplification circuit. The differential amplification 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 input end of a first comparator CO1, and a second end of the seventh resistor R7 is connected with an output end of a first comparator CO 1. The battery 2 is connected to a first end of the eighth resistor R8, a second end of the eighth resistor R8 is connected to a first end of the 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 as a differential amplifier circuit in fig. 4, and the differential amplifier circuit may be replaced by another amplifier circuit for acquiring 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. An output end of the first comparator CO1 is connected with a first end of a fifth resistor R5, a second end of the fifth resistor R5 is connected with a first end of a fourth resistor R4, a negative input end of the second comparator CO2 and a positive input end of a third comparator CO3, and a negative input end of the second comparator CO2 is connected with a positive input end of the third comparator CO 3. A second end of the fourth resistor R4 is connected to a first end of the first resistor R1 and a first end of the load resistor RL. A second end of the first resistor R1 is connected to a positive input terminal of the second comparator CO2 and a first end of the second resistor R2, respectively. The second end of the second resistor R2 is connected to the first end of the third resistor R3, the first end of the third resistor R3 is further connected to the negative input terminal 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 connected to the output end of the third comparator CO3, the second end of the load resistor RL and the isolation module respectively. The resistance of the fourth resistor R4 is equal to the resistance of the fifth resistor R5. Wherein the supply voltage of the second comparator CO2 is V_CC1The supply voltage of the third comparator CO3 is V_CC1. It should be understood that the driving module is illustrated as an example of the comparator circuit in fig. 4, and the comparator circuit may be replaced by other types of comparator circuits.

In one embodiment, the isolation module includes a first switch tube and a second switch tube. The output end of the driving module is connected with the first end of the first switch tube and the first end of the second switch tube respectively, the second end of the first switch tube is connected with the input ends of the first battery, the charging submodule and the sampling module respectively, the third end of the first switch tube is connected with the second end of the second switch tube, and the third end of the second switch tube is connected with the input ends of the second battery, the charging submodule and the sampling module respectively.

In one embodiment, the first switch tube and the second switch tube are both field effect transistors MOS, the first switch tube is a first MOSM1, and the second switch tube is a second MOSM 2. The gate of M1 is connected to the output of the second comparator CO2 and the output of the third comparator CO3, the source of M1 is connected to the battery 1, and the drain of M1 is connected to the source of M2. The gate of M2 is connected to the output terminal of the second comparator CO2 and the output terminal of the third comparator CO3, and the drain of M2 is connected to the battery 2. It should be understood that, in fig. 4, the isolation module is illustrated as including M1 and M2, and the switch tubes in the isolation module may be replaced by other types of switch tubes.

The switch tube according to the embodiment of the present application may be any switch tube capable of being turned on or off based on control, for example, an Insulated Gate Bipolar Transistor (IGBT), a Metal Oxide Semiconductor field effect Transistor (MOS), a triode, or a thyristor. At least one switching tube may be included in the protection controller. When the number of the switching tubes in the protection controller is multiple, the types of the switching tubes may be different, for example, a part of the switching tubes may adopt IGBTs, and the remaining part of the switching tubes may adopt MOS.

According to the circuit structure shown in fig. 4, the following explains the operation principle of the protection controller:

the voltage at point a in fig. 4 is equal to the voltage V of the battery 1_bat1And the voltage at point B is equal to the voltage V of the battery 2_bat2. Based on the basic principle of the differential amplifier circuit, the output end of the differential amplifier can output the amplified voltage difference between the voltage at the point A and the voltage at the point B, namely the amplified voltage difference between the battery 1 and the battery 2_gap. Wherein, V_gapCan be shown as the following formula one:

V_gap＝K(V_B-V_A)＝K(V_bat2-V_bat1) Formula one

Wherein the content of the first and second substances,

the basic principle and formula derivation of the differential amplification circuit can be referred to the prior art. V_BVoltage at point B, V_AThe voltage at point a is shown.

Since the voltage of the battery 2 may be greater or less than the voltage of the battery 1, (V)_B-V_A) The result of (c) may be a positive value or a negative value. 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 disposed in the comparator circuit, and (V) is calculated_B-V_A) As a result of which the applied bias voltage is converted into a positive voltage V_refWith V_refIn place of V_gapIs compared with a pressure difference threshold value to characterize V_gapThe result is compared to the magnitude of the pressure differential threshold. Referring to FIG. 4, V_refCan be shown as the following equation two:

referring to fig. 4, the sum of the voltages across the first resistor R1 and the second resistor R2 is V_HI.e. the upper limit value of the voltage threshold characterized by the comparator circuit, the sum of the voltage across the second resistor R2 and the voltage across the third resistor R3 is V_LI.e. the lower limit value of the voltage threshold characterized by the comparator circuit. Wherein, V_HAnd V_LCan be expressed as the following equation three and equation four, respectively:

the comparator circuit may set V_refVoltage threshold (V)_L，V_H). Wherein when the comparator circuit determines V_L≤V_ref≤V_HWhen it is, can ensureFixed V_refIn 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_gateHigh to turn on M1 and M2, thereby keeping battery 1 and battery 2 in parallel. When the comparator circuit determines V_ref>V_HOr V_ref<V_LThen V can be determined_refIs out of the voltage threshold, and indicates that the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold, the comparator circuit can output V_gateLow to turn off M1 and M2, thereby isolating battery 1 from battery 2. In one embodiment, the high level output by the comparator circuit (driving module) can be regarded as a turn-on command, which is used to instruct the isolation module to turn on, i.e. the first MOS and the second MOS are turned on. The low level output by the comparator circuit (driving module) can be regarded as a disconnection instruction for instructing the disconnection of the isolation module, that is, the disconnection of the first MOS and the second MOS.

It should be noted that the supply voltage V at the second comparator CO2_CC1And the supply voltage V of the third comparator CO3_CC1On the premise of fixation, V_HV is related to the ratio of the sum of the resistances of the first resistor R1 and the second resistor R2 to the sum of the resistances of the first resistor R1, the second resistor R2 and the third resistor R3_LIs related to the proportion of the third resistor R3 to the sum of the resistances of the first resistor R1, the second resistor R2 and the third resistor R3. In the embodiment of the application, the staff can set the resistance values of the first resistor R1, the second resistor R2 and the third resistor R3 in advance based on the differential pressure threshold value which can be born by the battery in the charging and discharging system, and then the differential pressure threshold value and the V are realized_HAnd V_L"match.

In one embodiment, if the pressure difference threshold V is_safeIs 50mV, V_CC1At 3.3V, the protection controller may be configured to set the resistances of the first resistor R1, the second resistor R2, and the third resistor R3 to be equal, all of which are 100 Ω, the resistance of the sixth resistor R6 to be 10 Ω, and the resistance of the sixth resistor R6 to be 220 Ω. Correspondingly, the upper limit value V in the voltage threshold of the comparator circuit_H2.2V, the lower limit value V of the voltage threshold of the comparator circuit_LIs 1.1V。

Wherein, the following formula five can be obtained according to the formula two:

V_ref＝1.65V+0.5V_gapformula five

Following the above equation one, the following equation six is obtained:

V_gap＝22(V_B-V_A) Formula six

Combining the fifth formula and the sixth formula can obtain the seventh formula:

V_ref＝1.65V+11(V_B-V_A) Formula seven

In conclusion, when-50 mV is less than or equal to (V)_B-V_A) Less than or equal to 50mV, i.e. V_L(1.1V)≤V_ref≤V_H(2.2V), the comparator circuit determines that the voltage difference between battery 1 and battery 2 is less than or equal to the voltage difference threshold, and may output a high level, turning on M1 and M2. When the voltage is 50mV<(V_B-V_A) I.e. VH<V_refOr when (V)_B-V_A)<-50mV, i.e. V_ref<V_LIf the comparator circuit determines that the voltage difference between battery 1 and battery 2 is greater than the voltage difference threshold, a low level may be output, turning off M1 and M2.

In an embodiment, a voltage difference threshold that can be borne by a battery of the charge and discharge system does not correspond to a current threshold, and for example, a worker 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, and the battery 1 or the battery 2 may 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 bear and the resistance of the protection controller. Illustratively, the differential pressure threshold is 50mV, and when the differential pressure between the battery 1 and the battery 2 is 50mV, the current value 5A of the protection controller is greater than the current threshold 4A that the battery 1 or the battery 2 can bear. The operator can therefore use the product of the current threshold 5A and the resistance of the protection control 40mV as the differential pressure threshold.

In the embodiment of the application, when the pressure difference threshold value is preset by a worker, the pressure difference threshold value and the current threshold value which can be borne by the battery of the charge-discharge system can be considered, and then the smaller pressure difference threshold value is taken as the pressure difference threshold value of the battery 1 and the battery 2, so that the safety of the battery 1 and the safety of the battery 2 can be accurately protected.

In this embodiment, the protection controller may be composed of an isolation module, a sampling module, and a driving module, and the sampling module may acquire a differential pressure between the battery 1 and the battery 2 and output the differential pressure to the driving module. The driving module can compare the pressure difference between the battery 1 and the battery 2 and the pressure difference threshold value, and then control the isolation module to be switched on or off, so that the aim of realizing the communication and isolation of the battery 1 and the battery 2 can be fulfilled. Furthermore, in 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

batteries

1 and 2 when the voltage difference between the

batteries

1 and 2 is large, so that the safety of the batteries is protected, the damage of the batteries 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.

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 apparatus. In one embodiment, the isolation module may be replaced with a switch tube and a 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 battery 1 and the first end of the switch tube respectively, the second end of the voltage detection device can be connected with the battery 2 and the first end of 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 stored therein in advance. The voltage detection device can detect the voltage of the battery 1 and the voltage of the battery 2, and further acquire 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 to keep the battery 1 and the battery 2 connected in parallel. If the voltage detection device detects that the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold value, the switch tube can be disconnected 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 conduction instruction to the isolation module (the switch tube and the resistor), where the conduction instruction is used to instruct the isolation module to conduct, that is, the switch tube conducts. When the voltage detection device detects that the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold value, the voltage detection device may output a disconnection instruction to the isolation module (the switch tube and the resistor), where the disconnection instruction is used to instruct the isolation module to be disconnected, that is, the switch tube is disconnected.

In one embodiment, the voltage detection device may be a chip, and the chip may integrate the voltage detection function and the voltage driving function.

The protection controller in the embodiment of the application can acquire the voltage difference between the battery 1 and the battery 2 by detecting the voltage of the battery 1 and the voltage of the battery 2, and can achieve the purpose of controlling the communication or isolation of the battery 1 and the battery 2.

Because the battery 1 and the battery 2 can 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, and the current value of the current flowing through the protection controller is also increased, in an embodiment, the protection controller can 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, so as to control the connection or isolation between the battery 1 and the battery 2.

In one embodiment, a current detection function may be integrated into the protection controller, and the protection controller may detect a 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 to keep the battery 1 and the battery 2 connected in parallel. If the protection controller detects that the current value of the protection controller is larger than the current threshold value, the protection controller can be disconnected, and the battery 1 and the battery 2 can be isolated, so that the battery 1 or the battery 2 can be protected. It should be understood that the current threshold may be pre-stored in the protection controller. In one embodiment, the current threshold may correspond to a differential pressure threshold, and the current threshold may be: the value of the current flowing through the protection controller when the differential pressure between the battery 1 and the battery 2 is equal to the differential pressure threshold value.

Fig. 5B is another schematic structural diagram of a protection controller according to an 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 may be connected in parallel with the resistor, a first end of the current detection device may be connected to a second end of the switching tube, the second end of the current detection device may be connected to the battery 2, and the first end of the switching tube may be connected to the battery 1.

Referring to fig. 5B, a current threshold 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 parallel connection of the battery 1 and the battery 2 is kept. 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 disconnected, and the battery 1 or the battery 2 can be protected. 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, the current detection device may output a conduction instruction to the isolation module (the switch tube and the resistor), where the conduction instruction is used to instruct the isolation module to conduct, that is, the switch tube is conducted. 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 a disconnection instruction to the isolation module (the switch tube and the resistor), where the disconnection instruction is used to instruct the isolation module to be disconnected, that is, the switch tube is disconnected.

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 switch tube based on the current value detected by the current sensor. The controller can conduct the switch tube based on the fact that the current value detected by the current sensor is smaller than or equal to the current threshold value. The controller can open the switch tube based on the current value detected by the current sensor being greater than the current threshold value.

In one embodiment, the "voltage difference between the battery 1 and the battery 2" detected by the protection controller and the "current value of the protection controller" may be replaced by a "parameter", and both the voltage difference threshold value and the current threshold value may be replaced by preset threshold values. The protection controller compares the voltage difference between the battery 1 and the battery 2 with a voltage difference threshold value, and compares the current value of the protection controller with a current threshold value, which can be understood as: the protection controller detects whether the parameters and the preset threshold value meet preset conditions. In the above embodiment, when the parameter is a differential pressure, the preset condition is that the differential pressure is less than or equal to a differential pressure threshold, and when the parameter is a current value, the current value is less than or equal to a current threshold.

The protection controller in the embodiment of the application can achieve the purpose of controlling the connection or isolation of the battery 1 and the battery 2 in a current value detection mode, and further achieve the technical effects of the embodiment.

In fig. 4, the charging submodule includes two voltage converters, the protection controller group includes 1 protection controller, and the battery pack includes 2 batteries. In one embodiment, referring to fig. 6, the charging submodule may include N voltage converters, N being an integer greater than or equal to 2. The protection controller group may include

A protection controller. The battery pack may include N batteries. One voltage converter may correspond to one battery, and any two of the N voltage converters may correspond to one protection controller. The battery may be, but is not limited to, a lithium battery. In one embodiment, the structure of the charging submodule, the discharging submodule, and the protection controller group may be referred to as a charging and discharging 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 cells.

The input end of each voltage converter is connected with the input end of the discharge submodule. The output end of the first voltage converter is connected with the first end of the first protection controller and the first battery respectively, the output end of the second voltage converter is connected with the second end of the first protection controller and the second battery respectively, and the output end of the discharging submodule is connected with the second end of the first protection controller, the second battery and a load in the electronic equipment respectively.

The first voltage converter and the second voltage converter may be any two of 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 of a protection controller group. In other words, the output ends of any two of the N voltage converters are connected to a protection controller, and the batteries corresponding to the any two voltage converters are also connected to the protection controller. In one embodiment, the charging submodule and the discharging submodule are arranged on the main board, and the voltage converter in the charging submodule and the discharging submodule are connected with the battery through the BTB connector.

In one embodiment, the above-mentioned charge 1 in fig. 4 may be used as the first voltage converter, the charge 2 may be used as the second voltage converter, the battery 1 may be used as the first battery, the battery 2 may be used as the second battery, and the protection controller may be used as the first protection controller. It is understood that for the first voltage converter and the second voltage converter, the output terminals of the first voltage converter and the second voltage converter may be connected to a protection controller. In one embodiment, the first battery and the second battery are not included in the charge and discharge system, and the connection relationship among the first voltage converter, the second voltage converter, the protection controller, and the first battery and the second battery is shown with reference to fig. 6.

In the above embodiments, the charging and discharging system provided by the embodiment of the present application is described, and in the production and manufacturing stage of the electronic device, the voltage difference between the battery 1 and the battery 2 can be detected, so as to connect or isolate the battery 1 and the battery 2. In most cases, the voltage difference between the battery 1 and the battery 2 is very small, the battery 1 and the battery 2 can be conducted by a charging and discharging system, and then when the electronic equipment is in a user use stage, the battery 1 and the battery 2 can be charged and discharged in parallel, so that the balance between the battery 1 and the battery 2 and the voltage is ensured. However, in a special case, the voltage difference between the battery 1 and the battery 2 is large, and the charging and discharging system can isolate the battery 1 and the battery 2 in order to ensure the safety of the battery 1 and the battery 2, but if the electronic device with the isolated battery 1 and the isolated battery 2 reaches the stage of using by a user, the battery 1 and the battery 2 are separately charged, 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 stage of the user, the battery 1 and the battery 2 with large voltage difference need to be pre-charged during the production and manufacturing stage 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 the connection between the detection controller and the charging and discharging system on the production line. It should be understood that only the protection controller in the charge and 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 Controller Unit (MCU). When the electronic device is installed in the detection area, one end of the detection controller may be connected to an output terminal of the second comparator CO2 in the protection controller, and the other end of the detection controller may be connected to the display device. Wherein, for an electronic device, when a worker or a mechanical arm installs a first battery, the driving module outputs a driving voltage V_gateIs at a low voltage. When a worker or a mechanical arm installs a second battery, if the pressure difference between the two batteries is greater than the pressure difference threshold value, the driving voltage V output by the driving module_gateThe driving voltage V output by the driving module is low voltage if the voltage difference between the two batteries is less than or equal to the voltage difference threshold value_gateIs a high voltage. In one embodiment, when the protection controller is connected to the MCU, if the driving module outputs a low voltage, it may be regarded as outputting a low voltage to the MCU, and when the driving module outputs a high voltage, it may be regarded as outputting a high voltage to the MCU.

A detection controller for detecting two driving voltages V continuously output by the driving module in the protection controller in an electronic device_gate. When the detection controller detects that the driving module outputs a low voltage for the first time and outputs a high voltage for the second time, it may be determined that the battery 1 and the battery 2 in the charge and discharge system are connected, that is, the voltage difference between the battery 1 and the battery 2 is less than or equal to the voltage difference threshold. When examiningWhen 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 charging and discharging system are isolated, namely 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 equipment is abnormal (the voltage difference between the battery 1 and the battery 2 is greater than the voltage difference threshold value), the battery 1 and the battery 2 need to be charged, and therefore the voltages of the battery 1 and the battery 2 are balanced. Referring to fig. 7, the display device may be a notebook computer, and the notebook computer displays an identifier of an abnormal electronic device, such as the electronic device 2.

Thus, the operator can observe the electronic device having abnormality on the display device. Alternatively, the display device may send an exception message to the robot arm when receiving the prompt message, the exception message indicating that the currently installed electronic device is abnormal. In order to balance the voltages of the battery 1 and the battery 2 installed in the electronic device, a worker or a robot arm may place the abnormal electronic device in which the battery 1 and the battery 2 are installed in a charging area to charge the battery of low voltage alone in the electronic device, so that the voltages of the two batteries are balanced. During the charging of the low-voltage battery, the voltage difference between the battery 1 and the battery 2 is gradually reduced. 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. Cell 1 and cell 2 are connected in parallel and will discharge simultaneously, the voltages in cell 1 and cell 2 remaining balanced at all times.

The above embodiments describe that in the manufacturing stage of the electronic device, the charging and discharging system in the embodiments of the present application can protect the safety of the battery when the voltage difference is large without selecting the battery with the same voltage. Since the charge and discharge system can turn on the

batteries

1 and 2 at the production and manufacturing stage of the electronic device, the voltages in the

batteries

1 and 2 are balanced. When the electronic device is in a charging mode, the charging and discharging system can still conduct the battery 1 and the battery 2 because the voltages in the battery 1 and the battery 2 are balanced when the electronic device is used by a user, and the charging speed is fast because both the charge 1 and the charge 2 are the battery 1 and the battery 2, which is described in detail below.

Based on the charge and discharge system provided by the embodiment of the present application, referring to fig. 8, in an embodiment, because in the production and manufacturing stage of the electronic device, the battery 1 and the battery 2 can be communicated, and the voltage balance between the battery 1 and the battery 2 is ensured. Therefore, when the user charges the electronic device, that is, 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, the protection controller may control the switching tubes (e.g., M1 and M2) in the protection controller to conduct to communicate the battery 1 and the battery 2, so that the battery 1 and the battery 2 are connected in parallel. When battery 1 and battery 2 are connected in parallel, since charger1 can charge battery 1 and battery 2, and charger2 can charge battery 1 and battery 2, the charging current of battery 1 and the charging current of battery 2 are both from charger1 and charger2, and the charging current of battery 1 and the charging current of 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, and are fully charged at the same time, so that the charging speed is higher.

According to the charging and discharging system provided by the embodiment of the application, when the electronic equipment is in a charging mode, the protection controller can control the switch tube in the protection controller to be conducted so as to communicate the battery 1 and the battery 2, and the purpose of balancing the charging pressure difference of the battery 1 and the battery 2 can be achieved. In addition, the battery 1 is communicated with the battery 2, and when the battery 1 and the battery 2 are charged, the power can be supplied to the load through the discharging submodule, so that the charging and the discharging are realized at the same time. When the electronic equipment is in a charging mode and heavy-load discharge exists in the electronic equipment, the battery 1, the battery 2 and the discharge submodule are all supplied with power by the heavy load, the battery 1 and the battery 2 discharge together, and the pressure difference balance of the battery 1 and the battery 2 can be further ensured.

When the electronic device is in a discharging mode, that is, when the electronic device is not connected to a power supply, the protection controller may control the switching tube in the protection controller to be turned on, so that the battery 1 and the battery 2 simultaneously supply power to a load in the electronic device, and further, the voltage balance between the battery 1 and the battery 2 may be ensured. In the embodiment of the present application, when the electronic device is in the charging mode, the voltages of the battery 1 and the battery 2 reach a balance, so when the electronic device is switched from the charging mode to the discharging mode, for example, at the moment when a user unplugs the charger, there is no voltage difference between the battery 1 and the battery 2, or the voltage difference is very small, a phenomenon of mutual charging of transient large currents cannot be generated, and the safety of the battery is improved.

Fig. 9 is a schematic view of charging in the event of a failure in the charge-discharge system shown in fig. 8. In the charging and discharging system provided by the embodiment of the application, when the electronic device is in the charging mode, the protection controller is communicated with the battery 1 and the battery 2. Therefore, if charge 1 fails, charge 1 cannot charge battery 1, but since charge 2 is connected to battery 1, charge 2 can also charge battery 1, and normal charging of battery 1 can be ensured.

In the charging and discharging system provided by the embodiment of the application, the charge-discharge devices are in backup relation with each other, if one charge-discharge device has a fault, the other charge-discharge devices can still be used for charging the battery, the working mode of the charge-discharge devices is more flexible, and the normal charging and discharging of the battery can be ensured.

After the electronic device is used for a long time, if the electronic device is used for a longer time than a third preset time, the

batteries

1 and 2 may age differently, and the impedance inside the

batteries

1 and 2 increases. Illustratively, the third preset duration may be 1 year. According to the charging and discharging system shown in fig. 1, when the electronic device is in the charging mode, if the internal impedance of the battery 2 is large, the charging current of the battery 2 is small, the charging 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 communicate the battery 1 and the battery 2, and the purpose of balancing the charging pressure difference of the battery 1 and the battery 2 can be achieved. In the embodiment of the present application, if the battery is aged, the protection controller may detect that the current value of the protection controller is greater than the current threshold, and may isolate the battery 1 and the battery 2, so as to protect the safety of the battery 1 and the battery 2.

Referring to fig. 10, an electronic device 100 is further provided in the embodiment of the present application, where the electronic device 100 may include a first battery, a second battery, and the charging and discharging system in the foregoing embodiment, and the electronic device 100 in the embodiment of the present application has the same technical effects as the charging and discharging system in the foregoing embodiment. The first battery may be battery 1, the second battery may be battery 2, and battery 1 and battery 2 are illustrated as an example in fig. 10.

In one embodiment, a load may be included in the electronic device 100. The first and second batteries, and the charging and discharging system may be referred to as a power supply module of the electronic device 100, to supply power to a load in the electronic device 100. For example, the load may be, but is not limited to, a processor, a memory, a sensor, etc., and is not shown in fig. 10.

The term "plurality" herein means two or more. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship; in the formula, the character "/" indicates that the preceding and following related objects are in a relationship of "division".

It is to be understood that the various numerical references referred to in the embodiments of the present application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of the present application. It should be understood that, in the embodiment of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present application.

Claims

1. A protection controller applied to an electronic device including a first battery and a second battery, characterized in that the protection controller is configured to be connected to the first battery and the second battery;

the protection controller is configured to:

detecting a parameter, wherein the parameter is a voltage difference between the first battery and the second battery or a current value of the protection controller;

in response to the parameter and a preset threshold not meeting a preset condition, disconnecting the first battery and the second battery;

and communicating the first battery and the second battery to enable the first battery and the second battery to be connected in parallel in response to the preset condition that the parameter and the threshold value are met.

2. The protection controller of claim 1, wherein the parameter is the differential pressure, the threshold is a differential pressure threshold, and the preset condition is the differential pressure being less than or equal to the differential pressure threshold.

3. The protection controller according to claim 2, characterized in that the protection controller comprises: the voltage 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 voltage detection device is used for:

detecting the pressure difference;

in response to the pressure differential being greater than the pressure differential threshold, outputting a disconnect command to the isolation module;

outputting a conduction instruction to the isolation module in response to the differential pressure being less than or equal to the differential pressure threshold;

the isolation module is configured to:

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 to communicate the first battery and the second battery.

4. The protection controller according to claim 3, wherein the voltage detection means includes: 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 drive module, and the output end of the drive module is connected with the isolation module;

the sampling module is configured to:

detecting the differential pressure and outputting the differential pressure to the driving module;

the driving module is used for:

in response to the differential pressure being greater than the differential pressure threshold, outputting a low level to the isolation module, the low level being indicative of the disconnect command;

and responding to the differential pressure being smaller than or equal to the differential pressure threshold value, and outputting a high level to the isolation module, wherein the high level is used for representing the conduction instruction.

5. The protection controller of claim 4, wherein the isolation module comprises a switch.

6. The protection controller according to claim 4 or 5, wherein the sampling module is a differential amplification circuit.

7. The protection controller according to any one of claims 4 to 6, wherein the driving module is a comparator circuit.

8. The protection controller of claim 5, wherein the switch comprises: the first switch tube and the second switch tube;

the output of drive module respectively with the first end of first switch tube, and the first end of second switch tube is connected, the second end of first switch tube respectively with first battery, and the input of sampling module is connected, the third end of first switch tube with the second end of second switch tube is connected, the third end of second switch tube respectively with the second battery, and the input of sampling module is connected.

9. The protection controller according to claim 8, wherein the first switch tube and the second switch tube are both field effect transistors MOS.

10. The protection controller according to claim 1, wherein the parameter is the current value, the threshold is a current threshold, and the preset condition is that the current value is less than or equal to the current threshold.

11. The protection controller according to claim 10, characterized in that the protection controller comprises: the device 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 disconnection instruction to the isolation module in response to the current value being greater than the current threshold;

responding to the current value being smaller than or equal to the current threshold value, and outputting a conduction instruction to the isolation module;

the isolation module is configured to:

12. The protection controller according to any one of claims 4 to 9, wherein the driving module is configured to be connected with a micro processing unit (MCU), the MCU being connected with a display device;

the driving module is further configured to:

and responding to the pressure difference being larger than the pressure difference threshold value, outputting the low level to the MCU, and responding to the pressure difference being smaller than or equal to the pressure difference threshold value, outputting the high level to the MCU for indicating the MCU to send prompt information to the display device.

13. 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 1-12.

14. The electronic device of claim 13, wherein the system further comprises: the output end of the first voltage converter is respectively connected with the first battery and the protection controller, the output end of the second voltage converter is respectively connected with the second battery and the protection controller, 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.

15. The electronic device of claim 14, further comprising: a load, the system further comprising: the input end of the discharging submodule 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 submodule 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 are all used for supplying power to the load;

when the system is in a charging mode and the protection controller disconnects the first battery and the second battery, the discharge submodule and the second battery both supply power to the load.

16. The electronic device of claim 15,

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 are both used for supplying power to the load;

when the system is in a discharge mode and the protection controller disconnects the connection between the first battery and the second battery, the second battery supplies power to the load.

17. The electronic device of any of claims 14-16, wherein the first voltage converter and the second voltage converter are each charge pumps.