Discharge control method and system and electronic equipment

Abstract

The invention is suitable for the technical field of batteries, and provides a discharge control method and system and electronic equipment. The discharging control method comprises the steps that a first battery obtains a first voltage of the first battery and a second voltage sent by a second battery; the first battery compares the first voltage with the second voltage; when the first voltage is greater than the second voltage, the first battery turns on a first charging switch of the first battery, and current detection is performed on the first battery to obtain first current information of the first battery; the first battery judges the overall use state of the first battery and the second battery according to the first current information; if it is judged that the overall use state is a discharge state, the first battery turns on a first discharge switch of the first battery and sends a first control signal to the second battery; the second battery switches off a second charging switch and a second discharging switch of the second battery according to the first control signal. According to the embodiment of the invention, the damage to the two groups of interconnected batteries during discharging can be reduced.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and in particular relates to a discharge control method, system and electronic equipment. Background Art

[0002] With the development of urbanization, more and more users are starting to use short-distance transportation tools such as electric vehicles. Usually, the original electric vehicle purchased by the user only has one battery or a group of batteries. Due to the demand for mileage or power usage, users often increase the number of batteries or battery packs when purchasing the electric vehicle or after using the electric vehicle for a period of time to meet the demand for mileage or power usage.

[0003] In some typical scenarios, when the user installs a battery or battery pack after using the electric vehicle for a period of time, the voltage of the installed battery is often different from the voltage of the initial battery due to the influence of the battery power. When the user connects the two and uses them to power the electric vehicle, the battery with a high voltage tends to charge the battery with a low voltage due to the potential difference between the two. At this time, for the high-voltage battery, it needs to power external devices and charge the low-voltage battery, which can easily cause the discharge current of the high-voltage battery to exceed its rated discharge current, thereby causing the battery temperature to rise and easily damage the battery. For the low-voltage battery, it will not only receive the electrical energy of the high-voltage battery, but also power external devices, that is, it has the situation of simultaneous charging and discharging, which will also affect the service life of the low-voltage battery. That is, in the related art, when the two groups of batteries are discharged, it is easy to damage the battery. Summary of the invention

[0004] The embodiments of the present application provide a discharge control method, system and electronic device, which can solve the problem in the related art that two groups of batteries are easily damaged during discharge.

[0005] In a first aspect, an embodiment of the present application provides a discharge control method, which is applied to a discharge control system, wherein the discharge control system further includes a first battery and a second battery, wherein the first battery and the second battery are connected in parallel and in communication, and the method includes:

[0006] The first battery obtains a first voltage of the first battery and a second voltage sent by the second battery;

[0007] The first battery compares the magnitude of the first voltage and the second voltage;

[0008] When the first voltage is greater than the second voltage, the first battery turns on a first charging switch of the first battery, and performs current detection on the first battery to obtain first current information of the first battery;

[0009] The first battery determines the overall usage status of the first battery and the second battery according to the first current information;

[0010] If it is determined that the overall use state is a discharge state, the first battery turns on a first discharge switch of the first battery and sends a first control signal to the second battery;

[0011] The second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal.

[0012] In a second aspect, an embodiment of the present application provides a discharge control system, the system comprising a first battery and a second battery, the first battery and the second battery being connected in parallel and in communication;

[0013] The first battery obtains a first voltage of the first battery and a second voltage sent by the second battery;

[0014] The first battery compares the magnitude of the first voltage and the second voltage;

[0015] When the first voltage is greater than the second voltage, the first battery turns on a first charging switch of the first battery, and performs current detection on the first battery to obtain first current information of the first battery;

[0016] The first battery determines the overall usage status of the first battery and the second battery according to the first current information;

[0017] If it is determined that the overall use state is a discharge state, the first battery turns on a first discharge switch of the first battery and sends a first control signal to the second battery;

[0018] The second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal.

[0019] In a third aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned discharge control method when executing the computer program.

[0020] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the above-mentioned discharge control method are implemented.

[0021] In a fifth aspect, an embodiment of the present application provides a computer program product. When the computer program product is run on an electronic device, the electronic device executes the above-mentioned discharge control method.

[0022] The beneficial effect of the embodiment of the present application compared with the prior art is that when the voltages of the two groups of batteries are different, the embodiment of the present application turns on the charging switch of the high-voltage battery (i.e., the first battery) and detects the current information of the high-voltage battery to determine the overall use status of the two groups of batteries. And when the overall use status is the discharge state, the charging switch and the discharging switch of the high-voltage battery are turned on to realize the discharge of the high-voltage battery to the external device. At the same time, the charging switch and the discharging switch of the second battery are turned off to prevent the low-voltage battery from receiving the electrical energy of the high-voltage battery, thereby avoiding the battery damage caused by the simultaneous charging and discharging of the low-voltage battery. In addition, since the low-voltage charging switch is turned off, the high-voltage battery will not discharge to the low-voltage battery, which can avoid the battery damage caused by the high-voltage battery exceeding the rated discharge current during discharge. That is, the embodiment of the present application can reduce the damage suffered by the two groups of interconnected batteries during discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0024] Figure 1 It is a schematic diagram of an implementation flow of a discharge control method provided in an embodiment of the present application;

[0025] Figure 2 It is a structural schematic diagram of a discharge control system provided in an embodiment of the present application;

[0026] Figure 3 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work are protected by the present application.

[0028] It should be noted that the terms "include", "comprises" and "have" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, terminal, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices. In the claims, specification and drawings of the present application, relational terms such as "first" and "second" are merely used to distinguish one entity / operation / object from another entity / operation / object, and do not necessarily require or imply any such real-time relationship or order between these entities / operations / objects.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] With the development of urbanization, more and more users are starting to use short-distance transportation tools such as electric vehicles. Usually, the original electric vehicle purchased by the user only has one battery or a group of batteries. Due to the demand for mileage or power usage, users often increase the number of batteries or battery packs when purchasing the electric vehicle or after using the electric vehicle for a period of time to meet the demand for mileage or power usage.

[0031] In some typical scenarios, when the user installs a battery or battery pack after using the electric vehicle for a period of time, the voltage of the installed battery is often different from the voltage of the initial battery due to the influence of the battery power. When the user connects the two and uses them to power the electric vehicle, the battery with a high voltage tends to charge the battery with a low voltage due to the potential difference between the two. At this time, for the high-voltage battery, it needs to power external devices and charge the low-voltage battery, which can easily cause the discharge current of the high-voltage battery to exceed its rated discharge current, thereby causing the battery temperature to rise and easily damage the battery. For the low-voltage battery, it will not only receive the electrical energy of the high-voltage battery, but also power external devices, that is, it has the situation of simultaneous charging and discharging, which will also affect the service life of the low-voltage battery. That is, in the related art, when the two groups of batteries are discharged, it is easy to damage the battery.

[0032] In view of this, an embodiment of the present application provides a discharge control method, which can reduce the damage caused by two groups of interconnected batteries during discharge.

[0033] In order to illustrate the technical solution of the present application, a specific embodiment is provided below for illustration.

[0034] Figure 1 A schematic diagram of a discharge control method according to an embodiment of the present application is shown. The method can be applied to Figure 2 The discharge control system shown. The discharge control system may include a first battery and a second battery. The first battery and the second battery are connected in parallel and in communication. It should be understood that the first battery and the second battery may be a single battery or a group of batteries composed of a plurality of batteries. The first battery and the second battery may be batteries of the same type, for example, they may be batteries of the same model.

[0035] Specifically, the first battery and the second battery may include an MCU, an AFE (Analog Front End) component, a shunt, and a communication circuit. Among them, the MCU is used to control the corresponding first battery and the second battery to execute the corresponding steps in the above-mentioned discharge control method. The AFE component is used to detect the voltage of the battery. The AFE component combined with the shunt can detect the current in the battery. The communication circuit can use 485 (RS-485) and CAN (Controller Area Network) industrial communication protocols to achieve communication connection between the two groups of batteries. Of course, in addition to the above structure, the first battery and the second battery can also use other structures or circuits to achieve the above functions.

[0036] Specifically, the above discharge control method may include the following steps S101 to S106.

[0037] Step S101: the first battery obtains a first voltage of the first battery and a second voltage sent by the second battery.

[0038] The first voltage is the voltage of the first battery, and the second voltage is the voltage of the second battery.

[0039] In an embodiment of the present application, the first battery can detect its own voltage (first voltage) through a built-in AFE component. Similarly, the second battery can also obtain its own voltage (second voltage). After both obtain their own voltages, they can send their own voltages to the other battery through a communication interface. Exemplarily, the second battery can send the voltage of the second battery (second voltage) to the first battery, and the first battery can obtain its own voltage (first voltage) and the voltage of the second battery (second voltage).

[0040] Step S102: the first battery compares the first voltage and the second voltage.

[0041] In the implementation manner of the present application, after obtaining the first voltage and the second voltage, the first battery can compare the two voltages through an internal MCU or logic circuit and obtain a comparison result.

[0042] The following are some examples of use scenarios of the embodiments of the present application:

[0043] In some scenarios, the electric car initially purchased by the user is only installed with one set of batteries. After driving the electric car, the user wants to increase the battery life or power of the electric car, so he buys a set of batteries of the same model as the initially installed batteries, and connects the two sets of batteries in parallel to form the above-mentioned first battery and second battery. It is understandable that since the first battery and the second battery are not installed and used at the same time, the power between the two is very likely to be different, which leads to different voltages between the two, so the first voltage of the first battery will be greater than the second voltage of the second battery. Of course, the scenario applicable to the embodiment of the present application is not the above one, but is applicable to all scenarios where two or two sets of batteries are connected in parallel.

[0044] Step S103, when the first voltage is greater than the second voltage, the first battery turns on a first charging switch of the first battery, and performs current detection on the first battery to obtain first current information of the first battery.

[0045] The first charging switch is a switch located on the first battery, which is used to control whether the first battery is charged, and can be a charging MOS. The current information is used to indicate whether there is a charging current in the corresponding battery, so the first current information is used to indicate whether there is a charging current in the first battery at this time.

[0046] It should be understood that, usually, for two batteries of the same type, it can be considered that the charge is proportional to the voltage, that is, if the voltage of one battery is greater than the voltage of the other battery, then it can be considered that the charge of the battery with the higher voltage is greater than the charge of the battery with the lower voltage.

[0047] Based on this, in the implementation of the present application, when the comparison result is that the first voltage is greater than the second voltage, it can be considered that the power of the first battery is greater than the power of the second battery. At this time, the first battery can turn on its charging switch and detect whether there is a charging current (first current information) in the first battery through the AFE component combined with the shunt.

[0048] Step S104: the first battery determines the overall usage status of the first battery and the second battery according to the first current information.

[0049] The overall use state may include a charging state and a discharging state. The charging state means that the discharge control system is receiving external power and is in a charging state as a whole. The discharging state means other states other than the charging state, for example, the discharge control system is in a discharging state as a whole, or the discharge control system is in a state of neither charging nor discharging.

[0050] In some specific embodiments of the present application, the first battery determines the overall usage status of the first battery and the second battery according to the first current information, which may specifically include step S401 or step S402.

[0051] Step S401: When the first current information corresponds to the presence of a charging current, the first battery determines that the overall usage state of the first battery and the second battery is a charging state.

[0052] In the implementation of the present application, since the voltage of the first battery is greater than the voltage of the second battery, the second battery will not charge the first battery, and at this time there will be no charging current from the second battery in the first battery. Therefore, when the first current information corresponds to the presence of a charging current, the charging current comes from the external power source, thereby determining that the overall use state of the first battery and the second battery is a charging state, that is, connected to an external power source.

[0053] Step S402: When the first current information corresponds to the absence of a charging current, the first battery determines that the overall usage state of the first battery and the second battery is a discharging state.

[0054] In the implementation mode of the present application, similarly, when the voltage of the first battery is greater than the voltage of the second battery, there will be no charging current from the second battery in the first battery. It should be understood that in the initial state, the charging switch and the discharging switch of the first battery and the second battery are both turned off. Based on this, when the charging switch of the second battery is turned off, if the discharge control system is connected to an external power supply, the charging current should be detected in the first battery at this time. Therefore, when the first current information corresponds to the absence of a charging current, it can be determined that the discharge control system is not connected to an external power supply, that is, the overall use state of the first battery and the second battery is a discharge state.

[0055] Step S105: if it is determined that the overall use state is a discharge state, the first battery turns on a first discharge switch of the first battery and sends a first control signal to the second battery.

[0056] The first discharge switch is a discharge switch located on the first battery, which is used to control whether the first battery discharges to other devices (such as an electric vehicle motor), and can specifically be a discharge MOS. The first control signal is a signal sent by the first battery to the second battery, which is used to control the charging switch and the discharging switch of the second battery.

[0057] After determining that the overall usage state of the first battery and the second battery is the discharge state, since the first voltage of the first battery is greater than the second voltage of the second battery, it can be understood that the power of the first battery is higher than the power of the second battery.

[0058] In order to avoid battery damage caused by the voltage difference between the two groups of batteries during the discharge process, in the embodiment of the present application, after determining that the overall use state is the discharge state, the first battery turns on the first discharge switch of the first battery, so that the first battery can power the external device. At the same time, the first battery also sends a first control signal to the second battery to control the charging switch and the discharging switch of the second battery.

[0059] It is understandable that before executing the above steps S101 to S105, the charging switch and the discharging switch of the first battery can be turned on or off. The charging switch and the discharging switch of the second battery can also be turned on or off. The on and off states of the charging switches and the discharging switches of the first battery and the second battery will not affect the execution of the above steps and subsequent steps.

[0060] Exemplarily, assuming that the initial state of the charging switch of the first battery is turned on, the “first battery turns on the first charging switch of the first battery” in the above step S103 may be to keep the first charging switch in the turned-on state. Also assuming that the initial state of the charging switch of the first battery is turned off, the “first battery turns on the first charging switch of the first battery” in the above step S103 may be to convert the first charging switch from the turned-off state to the turned-on state.

[0061] Step S106 : the second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal.

[0062] The second charging switch is a switch located on the second battery, used to control whether the second battery accepts charging, and can be a charging MOS. The second discharging switch is a switch located on the second battery, used to control whether the second battery discharges externally, and can be a discharging MOS.

[0063] In an embodiment of the present application, after the second battery receives the first control signal, the second charging switch and the second discharging switch of the second battery can be turned off. On the basis of turning on the first charging switch and the first discharging switch of the first battery in step S105, the second battery turns off the second charging switch and the second discharging switch. At this time, the second battery will neither receive electrical energy from the first battery or the external power supply, nor discharge to the external device, so as to avoid charging and discharging at the same time, thereby avoiding damage to the battery. In addition, when the whole is in a discharging state, the second battery does not discharge, which can narrow the gap in power with the first battery, so as to achieve power balance between the second battery and the first battery as soon as possible.

[0064] Since the second battery turns off the second charging switch, the first battery will not discharge additionally to the second battery, but only needs to discharge to the external device, which can prevent the discharge current from exceeding the rated discharge current and causing damage to the first battery.

[0065] The beneficial effect of the embodiment of the present application compared with the prior art is that when the voltages of the two groups of batteries are different, the embodiment of the present application turns on the charging switch of the high-voltage battery (i.e., the first battery) and detects the current information of the high-voltage battery to determine the overall use status of the two groups of batteries. And when the overall use status is the discharge state, the charging switch and the discharging switch of the high-voltage battery are turned on to realize the discharge of the high-voltage battery to the external device. At the same time, the charging switch and the discharging switch of the second battery are turned off to prevent the low-voltage battery from receiving the electrical energy of the high-voltage battery, thereby avoiding the battery damage caused by the simultaneous charging and discharging of the low-voltage battery. In addition, since the low-voltage charging switch is turned off, the high-voltage battery will not discharge to the low-voltage battery, which can avoid the battery damage caused by the high-voltage battery exceeding the rated discharge current during discharge. That is, the embodiment of the present application can reduce the damage suffered by the two groups of interconnected batteries during discharge.

[0066] In some specific embodiments of the present application, after the second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal, the method may further include steps S501 to S503.

[0067] Step S501: the first battery continuously performs current detection on the first battery to obtain second current information of the first battery.

[0068] The second current information is used to indicate whether there is a charging current in the first battery at this time.

[0069] In the implementation of the present application, during the discharge process, the charging switch of the first battery is always turned on, so the first battery can continuously perform current detection on the first battery, that is, continuously detect whether there is a charging current in the first battery, and obtain corresponding second current information. The specific detection process can refer to the above step S103, which will not be repeated here.

[0070] Step S502: the first battery determines the overall usage status of the first battery and the second battery according to the second current information.

[0071] In the implementation manner of the present application, the specific judgment process can refer to the above-mentioned step S104 and its specific implementation manner, which will not be repeated here.

[0072] Step S503: if it is determined that the overall use state is the charging state, the first battery turns off the first charging switch and the first discharging switch, and sends a second control signal to the second battery.

[0073] It is understandable that in some usage scenarios, after using the electric vehicle, the user will charge it (that is, charge the discharge control system), and at this time the first battery and the second battery will switch to the charging state.

[0074] In this case (connected to an external power supply), the first battery can detect the charging current and then determine that the overall usage state is a charging state. At this time, the first battery can turn off its first charging switch and first discharging switch, and send a second control signal to the second battery to instruct the second battery to turn on the second charging switch.

[0075] In some specific implementations of the present application, after sending the second control signal to the second battery, the method further includes steps S601 to S604.

[0076] Step S601: the second battery turns on a second charging switch according to a second control signal.

[0077] In an embodiment of the present application, after the second battery receives the second control signal, the second charging switch of the second battery may be turned on.

[0078] Step S602: the second battery performs current detection on the second battery to obtain third current information of the second battery.

[0079] In the implementation manner of the present application, after the second battery turns on the second charging switch, it is possible to further detect whether there is a charging current in the second battery, thereby obtaining third current information of the second battery.

[0080] Step S603: The second battery determines the overall usage status of the first battery and the second battery according to the third current information.

[0081] In the implementation of the present application, for the second battery, on the basis of turning off the first charging switch and the first discharging switch of the first battery, the second battery will not receive electric energy from the first battery. At this time, if a charging current is detected in the second battery, it can be considered that the overall use state of the first battery and the second battery is a charging state. Otherwise, it can be determined that the overall use state of the first battery and the second battery is a discharging state.

[0082] It should be understood that a transient current may be generated inside the battery when it is not charged, or no current may be detected at a certain moment when it is charging, which can easily lead to misjudgment. In the implementation mode of the present application, when the first battery determines that the overall usage status is a charging status, the overall usage status is re-determined by the second battery, which can effectively avoid misjudgment.

[0083] Step S604: if it is determined that the overall usage state is the charging state, the second battery turns on the second discharge switch.

[0084] In an embodiment of the present application, if the second battery determines that the overall usage state is the charging state again based on the first battery determining that the overall usage state is the charging state, the second battery can turn on the second discharge switch.

[0085] In the embodiment of the present application, after the overall use state of the first battery and the second battery is converted from the discharge state to the charge state, a secondary determination is first performed to avoid misjudgment. When the secondary determination is in the charge state, the second discharge switch of the second battery is turned on to charge the second battery with low power first, so that the power of the second battery is close to that of the first battery, so as to avoid damaging the battery during subsequent charging or use.

[0086] In some usage scenarios, the user just plugs in the charger for the electric vehicle, and the discharge control system is in the charging state, and then unplugs the charger soon, and the discharge control system is in the discharging state again. Based on this, in some specific implementations of the present application, after the second battery determines the overall usage status of the first battery and the second battery according to the third current information, steps S701 to S704 may also be included.

[0087] Step S701: If it is determined that the overall use state is a discharge state, the second battery turns off the second charging switch and sends a third control signal to the first battery.

[0088] In an embodiment of the present application, if the second battery determines that the overall usage state is a discharging state, and the first battery with a high charge needs to be discharged, the second battery turns off the second charging switch and sends a third control signal to the first battery to instruct the first battery to turn on its charging switch.

[0089] Step S702: the first battery turns on a first charging switch of the first battery according to the third control signal, and performs current detection on the first battery to obtain fourth current information of the first battery.

[0090] In an embodiment of the present application, after the first battery receives the third control signal, the first charging switch of the first battery may be turned on, and current detection may be performed on the first battery to obtain fourth current information of the first battery.

[0091] Step S703: the first battery determines the overall usage status of the first battery and the second battery according to the fourth current information.

[0092] In the implementation manner of the present application, the specific judgment process can refer to the above-mentioned step S104 and its specific implementation manner, which will not be repeated here.

[0093] Step S704: if it is determined that the overall usage state is a discharging state, the first battery turns on a first discharging switch.

[0094] In an embodiment of the present application, if it is determined after the secondary verification that the overall usage state is a discharging state, the first battery turns on the first discharging switch to discharge or prepare to discharge for the external device.

[0095] In some specific implementations of the present application, after the second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal, steps S801 to S804 may also be included.

[0096] Step S801: The first battery and the second battery continuously obtain a first voltage and a second voltage.

[0097] In the implementation manner of the present application, the first battery and the second battery can continuously monitor their own voltages and obtain the voltage of each other through the built-in AFE component.

[0098] Step S802: When the first battery detects that the first voltage is less than or equal to the second voltage, current detection is performed on the first battery to obtain fifth current information of the first battery.

[0099] It should be understood that when the first battery detects that the first voltage is less than or equal to the second voltage at a certain moment, it can usually be considered that the power of the first battery is consistent with the power of the second battery at this time. Based on this, the usual practice is to discharge the first battery and the second battery simultaneously from this moment. However, after a lot of research, the applicant found that when the voltage of the first battery decreases from higher than the voltage of the second battery to equal to or lower than the voltage of the second battery, it does not necessarily mean that the power of the first battery is consistent with the power of the second battery. Instead, a "pseudo-balance" phenomenon may occur, that is, when the voltage of the first battery decreases from higher than the voltage of the second battery to equal to or lower than the voltage of the second battery, it is not caused by the power of the first battery decreasing to the same as the power of the second battery, but the first battery has a large voltage change in a short period of time, resulting in a sudden decrease in the detected first voltage, making the second voltage greater than or equal to the second voltage. In fact, the power of the second battery is still lower than the power of the first battery.

[0100] Based on this, in the implementation of the present application, when the first battery detects that the first voltage is less than or equal to the second voltage, the first battery does not immediately turn on the second charging switch and the second discharging switch to enter the discharging state. Instead, the first battery is firstly current detected to obtain the fifth current information of the first battery, thereby verifying whether the power of the second battery is equal to or greater than that of the first battery.

[0101] Step S803: if the fifth current information corresponds to the presence of a charging current, the first battery keeps turning on the first charging switch and the first discharging switch, and sends a fourth control signal to the second battery.

[0102] In the implementation of the present application, if the fifth current information corresponds to the presence of a charging current, it can be considered that the charging current is generated by the second battery charging the first battery, which corresponds to the second battery having a higher power than the first battery. At this time, the first battery keeps turning on the first charging switch and the first discharging switch, and sends a fourth control signal to the second battery.

[0103] Step S804: the second battery turns on a second charging switch and a second discharging switch of the second battery according to a fourth control signal.

[0104] In an embodiment of the present application, after the second battery receives the fourth control signal, the second charging switch and the second discharging switch of the second battery may remain turned on.

[0105] At this time, the power levels of the first battery and the second battery are equal or substantially close, so that the two batteries are discharged at the same time. No charging current will be generated due to the voltage difference, or the generated charging current will be very small, thus avoiding damage to the batteries.

[0106] In some specific implementations of the present application, after the current detection is performed on the first battery to obtain the fifth current information of the first battery, step S901 and step S902 may also be included.

[0107] Step S901: if the fifth current information corresponds to the presence of a non-charging current, the first battery keeps turning on the first charging switch and the first discharging switch, and sends a fifth control signal to the second battery.

[0108] In the implementation of the present application, if the fifth current information corresponds to the absence of charging current, it can be considered that the current power level of the second battery is still lower than the power level of the first battery. That is, the phenomenon of detecting that the first voltage is less than or equal to the second voltage is caused by the above-mentioned "pseudo-balance" phenomenon. Therefore, the first battery still keeps the first charging switch and the first discharging switch turned on, and sends the fourth control signal to the second battery.

[0109] Step S902: the second battery keeps closing a second charging switch and a second discharging switch of the second battery according to the fifth control signal.

[0110] In the embodiment of the present application, after receiving the fifth control signal, the second battery keeps the second charging switch and the second discharging switch of the second battery closed, that is, even if the second battery does not enter the discharging state, while the first battery is still discharging, the power difference between the two can be reduced.

[0111] In the embodiment of the present application, after determining that a "pseudo-balance" phenomenon occurs, the charging switch of the second battery is not turned on to prevent the first battery from charging the second battery and causing damage to the battery.

[0112] The above implementations are all implemented based on the initial detection that the first voltage of the first battery is greater than the second voltage of the second battery. Now, the implementation corresponding to the initial detection that the first voltage of the first battery is less than the second voltage of the second battery is described. In some implementations of the present application, after the first battery obtains the first voltage of the first battery and the second voltage sent by the second battery, steps S1001 to S1005 may also be included.

[0113] Step S1001, the second battery compares the first voltage and the second voltage;

[0114] Step S1002, when the first voltage is less than the second voltage, the second battery turns on a second charging switch of the second battery, and performs current detection on the second battery to obtain sixth current information of the second battery;

[0115] Step S1003, the second battery determines the overall usage status of the first battery and the second battery according to the sixth current information;

[0116] Step S1004, if it is determined that the overall use state is a discharge state, the second battery turns on a second discharge switch of the second battery and sends a fifth control signal to the first battery;

[0117] Step S1005 : the first battery turns off a first charging switch and a first discharging switch of the first battery according to the fifth control signal.

[0118] In the implementation of the present application, when the first voltage is less than the second voltage, the second battery can execute the specific implementation of the first battery in steps S102 to S106, and the first battery can execute the specific implementation of the second battery in steps S102 to S106. That is, when the first voltage is less than the second voltage, the steps executed by the second battery are consistent with the steps executed by the first battery when the first voltage is greater than the second voltage. And, when the first voltage is less than the second voltage, the steps executed by the first battery are consistent with the steps executed by the second battery when the first voltage is greater than the second voltage.

[0119] Figure 2 A schematic diagram of the structure of a discharge control system provided in an embodiment of the present application is shown. The discharge control system 2 includes a first battery and a second battery. The first battery and the second battery are connected in parallel and in communication connection.

[0120] The first battery obtains a first voltage of the first battery and a second voltage sent by the second battery;

[0121] The first battery compares the magnitude of the first voltage and the second voltage;

[0122] When the first voltage is greater than the second voltage, the first battery turns on a first charging switch of the first battery, and performs current detection on the first battery to obtain first current information of the first battery;

[0123] The first battery determines the overall usage status of the first battery and the second battery according to the first current information;

[0124] If it is determined that the overall use state is a discharge state, the first battery turns on a first discharge switch of the first battery and sends a first control signal to the second battery;

[0125] The second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal.

[0126] The beneficial effect of the embodiment of the present application compared with the prior art is that when the voltages of the two groups of batteries are different, the embodiment of the present application turns on the charging switch of the high-voltage battery (i.e., the first battery) and detects the current information of the high-voltage battery to determine the overall use status of the two groups of batteries. And when the overall use status is the discharge state, the charging switch and the discharging switch of the high-voltage battery are turned on to realize the discharge of the high-voltage battery to the external device. At the same time, the charging switch and the discharging switch of the second battery are turned off to prevent the low-voltage battery from receiving the electrical energy of the high-voltage battery, thereby avoiding the battery damage caused by the simultaneous charging and discharging of the low-voltage battery. In addition, since the low-voltage charging switch is turned off, the high-voltage battery will not discharge to the low-voltage battery, which can avoid the battery damage caused by the high-voltage battery exceeding the rated discharge current during discharge. That is, the embodiment of the present application can reduce the damage suffered by the two groups of interconnected batteries during discharge.

[0127] In some embodiments of the present application, after the second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal, the method further includes: the first battery continuously performs current detection on the first battery to obtain second current information of the first battery; the first battery determines the overall usage status of the first battery and the second battery according to the second current information; if the overall usage status is determined to be a charging state, the first battery turns off the first charging switch and the first discharging switch, and sends a second control signal to the second battery.

[0128] In some embodiments of the present application, after sending the second control signal to the second battery, it also includes: the second battery turns on the second charging switch according to the second control signal; the second battery performs current detection on the second battery to obtain third current information of the second battery; the second battery determines the overall usage status of the first battery and the second battery according to the third current information; if the overall usage status is determined to be a charging state, the second battery turns on the second discharge switch.

[0129] In some embodiments of the present application, after the second battery determines the overall usage status of the first battery and the second battery according to the third current information, it also includes: if the overall usage status is determined to be a discharge state, the second battery turns off the second charging switch and sends a third control signal to the first battery; the first battery turns on the first charging switch of the first battery according to the third control signal, and performs current detection on the first battery to obtain fourth current information of the first battery; the first battery determines the overall usage status of the first battery and the second battery according to the fourth current information; if the overall usage status is determined to be a discharge state, the first battery turns on the first discharge switch.

[0130] In some embodiments of the present application, after the second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal, the method further includes: the first battery and the second battery continuously obtain the first voltage and the second voltage; when the first battery detects that the first voltage is less than or equal to the second voltage, current detection is performed on the first battery to obtain fifth current information of the first battery; if the fifth current information corresponds to the presence of a charging current, the first battery keeps turning on the first charging switch and the first discharging switch, and sends a fourth control signal to the second battery; the second battery turns on the second charging switch and the second discharging switch of the second battery according to the fourth control signal.

[0131] In some embodiments of the present application, after performing current detection on the first battery and obtaining the fifth current information of the first battery, it also includes: if the fifth current information corresponds to the existence of a non-charging current, the first battery keeps turning on the first charging switch and the first discharging switch, and sends a fifth control signal to the second battery; the second battery keeps turning off the second charging switch and the second discharging switch of the second battery according to the fifth control signal.

[0132] In some embodiments of the present application, the overall usage status includes a charging status and a discharging status, and the current information is used to characterize whether there is a charging current. The first battery determines the overall usage status of the first battery and the second battery based on the first current information, including: when the first current information corresponds to the presence of a charging current, the first battery determines that the overall usage status of the first battery and the second battery is a charging status; when the first current information corresponds to the absence of a charging current, the first battery determines that the overall usage status of the first battery and the second battery is a discharging status.

[0133] In some embodiments of the present application, after the first battery obtains the first voltage of the first battery and the second voltage sent by the second battery, it also includes: the second battery compares the first voltage and the second voltage; when the first voltage is less than the second voltage, the second battery turns on the second charging switch of the second battery, and performs current detection on the second battery to obtain sixth current information of the second battery; the second battery determines the overall usage status of the first battery and the second battery according to the sixth current information; if the overall usage status is determined to be a discharge state, the second battery turns on the second discharge switch of the second battery and sends a fifth control signal to the first battery; the first battery turns off the first charging switch and the first discharge switch of the first battery according to the fifth control signal.

[0134] like Figure 3, which is a schematic diagram of an electronic device provided in an embodiment of the present application. The electronic device 3 may include: a processor 301, a memory 302, and a computer program 303 stored in the memory 302 and executable on the processor 301, such as a discharge control program. When the processor 301 executes the computer program 303, the steps in the above-mentioned discharge control method embodiments are implemented, such as Figure 1 Steps S101 to S106 are shown.

[0135] The computer program may be divided into one or more modules / units, one or more modules / units are stored in the memory 302 and executed by the processor 301 to complete the present application. One or more modules / units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program in the electronic device.

[0136] The electronic device may include, but is not limited to, a processor 301 and a memory 302. Those skilled in the art will appreciate that Figure 3 These are merely examples of electronic devices and do not constitute a limitation of the electronic device. The electronic device may include more or fewer components than those shown in the figure, or a combination of certain components, or different components. For example, the electronic device may also include input and output devices, network access devices, buses, etc.

[0137] The processor 301 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0138] The memory 302 may be an internal storage unit of the electronic device, such as a hard disk or memory of the electronic device. The memory 302 may also be an external storage device of the electronic device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), etc. equipped on the electronic device. Further, the memory 302 may also include both an internal storage unit of the electronic device and an external storage device. The memory 302 is used to store computer programs and other programs and data required by the electronic device. The memory 302 may also be used to temporarily store data that has been output or is to be output.

[0139] It should be noted that, for the convenience and brevity of description, the structure of the above electronic device can also refer to the specific description of the structure in the method embodiment, which will not be repeated here.

[0140] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0141] The embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps in the above-mentioned discharge control method can be implemented.

[0142] An embodiment of the present application provides a computer program product. When the computer program product is run on a mobile terminal, the steps in the above-mentioned discharge control method can be implemented when the mobile terminal executes the computer program product.

[0143] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0144] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0145] In the embodiments provided in the present application, it should be understood that the disclosed devices / electronic devices and methods can be implemented in other ways. For example, the device / electronic device embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0146] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0147] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0148] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0149] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A discharge control method, characterized in that: Applied to a discharge control system, the discharge control system further includes a first battery and a second battery, the first battery and the second battery are connected in parallel and in communication, the method includes: The first battery obtains a first voltage of the first battery and a second voltage sent by the second battery; The first battery compares the first voltage and the second voltage; When the first voltage is greater than the second voltage, the first battery turns on a first charging switch of the first battery, and performs current detection on the first battery to obtain first current information of the first battery; The first battery determines, according to the first current information, an overall usage status of the first battery and the second battery; If it is determined that the overall usage state is a discharging state, the first battery turns on a first discharging switch of the first battery and sends a first control signal to the second battery; The second battery turns off a second charging switch and a second discharging switch of the second battery according to the first control signal.

2. The discharge control method according to claim 1, characterized in that: After the second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal, the method further includes: The first battery continuously performs current detection on the first battery to obtain second current information of the first battery; The first battery determines the overall usage status of the first battery and the second battery according to the second current information; If it is determined that the overall usage state is a charging state, the first battery turns off the first charging switch and the first discharging switch, and sends a second control signal to the second battery.

3. The discharge control method according to claim 2, characterized in that: After sending the second control signal to the second battery, the method further includes: The second battery turns on the second charging switch according to the second control signal; The second battery performs current detection on the second battery to obtain third current information of the second battery; The second battery determines the overall usage status of the first battery and the second battery according to the third current information; If it is determined that the overall usage state is a charging state, the second battery turns on the second discharge switch.

4. The discharge control method according to claim 3, characterized in that: After the second battery determines the overall usage status of the first battery and the second battery according to the third current information, the method further includes: If it is determined that the overall usage state is a discharging state, the second battery turns off the second charging switch and sends a third control signal to the first battery; The first battery turns on a first charging switch of the first battery according to the third control signal, and performs current detection on the first battery to obtain fourth current information of the first battery; The first battery determines the overall usage status of the first battery and the second battery according to the fourth current information; If it is determined that the overall usage state is a discharging state, the first battery turns on the first discharging switch.

5. The discharge control method according to claim 1, characterized in that: After the second battery turns off the second charging switch and the second discharging switch of the second battery according to the first control signal, the method further includes: The first battery and the second battery continuously obtain the first voltage and the second voltage; When the first battery detects that the first voltage is less than or equal to the second voltage, performing current detection on the first battery to obtain fifth current information of the first battery; If the fifth current information corresponds to the presence of a charging current, the first battery keeps turning on the first charging switch and the first discharging switch, and sends a fourth control signal to the second battery; The second battery turns on the second charging switch and the second discharging switch of the second battery according to the fourth control signal.

6. The discharge control method according to claim 5, characterized in that: After the current detection is performed on the first battery to obtain fifth current information of the first battery, the method further includes: If the fifth current information corresponds to the presence of a non-charging current, the first battery keeps turning on the first charging switch and the first discharging switch, and sends a fifth control signal to the second battery; The second battery keeps the second charging switch and the second discharging switch of the second battery closed according to the fifth control signal.

7. The discharge control method according to claim 1, characterized in that: The overall use state includes a charging state and a discharging state, the current information is used to indicate whether there is a charging current, and the first battery determines the overall use state of the first battery and the second battery according to the first current information, including: When the first current information corresponds to the presence of a charging current, the first battery determines that the overall usage state of the first battery and the second battery is a charging state; When the first current information corresponds to the absence of a charging current, the first battery determines that the overall usage state of the first battery and the second battery is a discharging state.

8. The discharge control method according to claim 1, characterized in that: After the first battery acquires the first voltage of the first battery and the second voltage sent by the second battery, the method further includes: The second battery compares the first voltage and the second voltage; When the first voltage is less than the second voltage, the second battery turns on a second charging switch of the second battery, and performs current detection on the second battery to obtain sixth current information of the second battery; The second battery determines the overall usage status of the first battery and the second battery according to the sixth current information; If it is determined that the overall use state is a discharge state, the second battery turns on a second discharge switch of the second battery and sends a fifth control signal to the first battery; The first battery turns off a first charging switch and a first discharging switch of the first battery according to the fifth control signal.

9. A discharge control system, characterized in that: The system includes a first battery and a second battery, wherein the first battery and the second battery are connected in parallel and in communication; The first battery obtains a first voltage of the first battery and a second voltage sent by the second battery; The first battery compares the first voltage and the second voltage; When the first voltage is greater than the second voltage, the first battery turns on a first charging switch of the first battery, and performs current detection on the first battery to obtain first current information of the first battery; The first battery determines, according to the first current information, an overall usage status of the first battery and the second battery; If it is determined that the overall usage state is a discharging state, the first battery turns on a first discharging switch of the first battery and sends a first control signal to the second battery; The second battery turns off a second charging switch and a second discharging switch of the second battery according to the first control signal.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the discharge control method according to any one of claims 1 to 8 when executing the computer program.

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