CN113767538B

CN113767538B - Battery management apparatus, system, battery, mobile device, and method

Info

Publication number: CN113767538B
Application number: CN202080025670.2A
Authority: CN
Inventors: 李鹏; 金军骞; 林宋荣
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2020-05-07
Filing date: 2020-05-07
Publication date: 2024-05-10
Anticipated expiration: 2040-05-07
Also published as: WO2021223158A1; CN113767538A

Abstract

The application provides a battery management device, which comprises a detection unit and a control unit, wherein one end of the detection unit is connected with equipment, and the other end of the detection unit is connected with the control unit, wherein the detection unit outputs different level signals when being connected with different equipment, and the equipment is power supply equipment or power consumption equipment; the control unit is used for determining the equipment connected with the detection unit based on the level signal and controlling the charging or discharging state of the battery unit. The application realizes the management of the charge and discharge of the battery, and also provides a battery management system, a battery, a movable device and a charge and discharge management method.

Description

Battery management apparatus, system, battery, mobile device, and method

Technical Field

The present application relates to the field of battery management, and in particular, to a battery management device, a battery management system, a battery, a mobile device, and a method for charge and discharge management.

Background

For a daily battery pack composed of a plurality of single batteries, for expanding the electric quantity of the battery pack, a parallel connection mode can be adopted for the plurality of single batteries in the battery pack, or a parallel connection mode can be adopted for the plurality of small battery packs in the battery pack, but the electric levels of the parallel batteries cannot be equal absolutely, so that potential difference is formed, and the problem that whether a charger is in place or not cannot be accurately judged by the battery pack composed of the parallel batteries is caused.

Disclosure of Invention

The embodiment of the application provides a battery management device, a battery management system, a battery, mobile equipment and a charge and discharge management method.

In a first aspect, an embodiment of the present application provides a battery management apparatus, including:

The detection unit is used for connecting one end with the equipment and the other end with the control unit, and outputting different level signals when different equipment is connected with the detection unit; the equipment is power supply equipment or power consumption equipment;

and the control unit is used for determining the equipment connected with the detection unit based on the level signal and controlling the charging or discharging state of the battery unit.

In a second aspect, an embodiment of the present application provides a battery management system, including a battery management device and a battery, where the battery includes a battery unit;

the battery management device includes:

In a third aspect, an embodiment of the present application provides a battery including a battery unit and a battery management device, the battery management device including:

In a fourth aspect, an embodiment of the present application provides a mobile platform, on which a battery is mounted, the battery including a battery unit and a battery management device, the battery management device including:

In a fifth aspect, an embodiment of the present application provides a method for charge and discharge management, including:

the device is connected with the equipment through a detection unit, wherein the detection unit outputs different level signals when different equipment is connected; the equipment is power supply equipment or power consumption equipment;

and determining the equipment connected with the detection unit based on the level signal, and controlling the charging or discharging state of the battery unit.

In a sixth aspect, the application provides a computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of the fifth aspect described above.

In a seventh aspect, the application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the fifth aspect described above.

The battery management device provided by the application can realize that the control unit judges that the connected equipment is power supply equipment or power consumption equipment according to the level state output when the detection unit is connected with different equipment, and correspondingly controls the state of the battery, so that the battery is effectively managed.

Drawings

Fig. 1 is a schematic diagram of a battery pack of a drone powering the drone according to an exemplary embodiment of the present application.

Fig. 2 is a schematic structural view of a battery management device according to an exemplary embodiment of the present application.

Fig. 3 is a schematic diagram showing connection between a detection unit and a device, and between the detection unit and a control unit according to an exemplary embodiment of the present application.

Fig. 4 is a schematic structural view of a detection unit according to an exemplary embodiment of the present application.

Fig. 5 is a schematic view illustrating a structure of a battery management device according to an exemplary embodiment of the present application.

Fig. 6 is a schematic diagram showing connection of a detection unit, a first detection subunit, a second detection subunit, a device, a control unit, and a battery unit according to an exemplary embodiment of the present application.

Fig. 7 is a schematic structural diagram of a second detection subunit according to an exemplary embodiment of the present application.

Fig. 8 is a diagram illustrating a battery management system according to an exemplary embodiment of the present application.

Fig. 9 is a battery according to an exemplary embodiment of the present application.

Fig. 10 is a movable platform according to an exemplary embodiment of the present application.

Fig. 11 is a flowchart illustrating a method of charge and discharge management according to an exemplary embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

When the battery is used for supplying power to the equipment, the length of the power supply time is considered, the temperature, the electric quantity and the like of the battery are required to be detected in real time, so that whether the battery is abnormal or not is judged, the service life of the battery is prolonged, the battery is not directly supplied with power by using the single battery, a plurality of single batteries, detection circuits, protection circuits, a shell and the like of the plurality of batteries are packaged to form a battery pack, and the battery pack is used for supplying power to the equipment. While it is considered to expand the capacity of the battery pack as much as possible and to extend the service life of the battery, the batteries inside the battery pack are generally connected in parallel.

However, there is a common problem in parallel connection of batteries, that is, the problem of mutual charging between batteries occurs, because the main parameters of the capacity, internal resistance, electromotive force, etc. of the batteries are closely related to the performance of the raw materials (active materials and electrolyte) of the batteries, the battery structure, the battery size, and the manufacturing process, and even if the batteries in the same batch as the manufacturer are guaranteed to be completely consistent, it is difficult to realize. Therefore, when the batteries leave the factory, certain differences exist in capacity, internal resistance and electromotive force, and when different batteries are connected in parallel, the batteries with high electromotive force can charge the batteries with low electromotive force, so that lithium is easily separated out after charging, and combustion accidents are further caused.

Fig. 1 is a schematic diagram of a battery pack of an unmanned aerial vehicle for supplying power to the unmanned aerial vehicle, wherein the battery pack 10 includes a single battery 101 and a single battery 102, the battery pack 10 is connected with the unmanned aerial vehicle 11 and supplies power to the unmanned aerial vehicle 11, due to the difference between the single battery 101 and the single battery 102, a potential difference exists between the single battery 101 and the single battery 102, and if the electromotive force of the single battery 101 is higher than that of the single battery 102, the single battery 101 charges the single battery 102 in the process of supplying power to the unmanned aerial vehicle 11 by the battery pack 10, so that the battery is damaged. Therefore, for a battery pack composed of parallel single batteries, a battery charging event occurs when a power-consuming device is connected, and in fact, this is also due to the difference between the single batteries, which causes a problem that it is impossible to determine whether or not a charger is in place.

The embodiment of the application provides a battery management device, which manages the charge state or discharge state of a single battery in a battery pack by identifying equipment connected with the battery pack, so that the battery pack can accurately identify that power supply equipment or power consumption equipment is in place and can enter a correct state according to the connection condition with the equipment. The charge state and the discharge state of the battery unit in the embodiment of the application can be understood that when the battery unit is in the charge state, the battery unit is allowed to acquire electric quantity from external power supply equipment for charging, and meanwhile, the battery unit can also discharge to an internal circuit, and of course, the battery unit can also be only allowed to acquire electric quantity from the external power supply equipment, so that the battery unit is forbidden to discharge; when the battery unit is in a discharging state, only the battery unit is allowed to discharge, the battery unit is forbidden to acquire electric quantity for charging, and the mutual charging among batteries is avoided. In addition, the battery management device in the embodiment of the present application may be integrated on the battery pack, or may be integrated on a physical device capable of being connected to the battery pack, and in which physical form the battery management device specifically exists, the present application is not limited thereto.

It can be understood that the battery management device in the embodiment of the present application is not only applicable to a battery pack composed of a plurality of parallel unit batteries, but also applicable to a battery pack composed of a plurality of serial unit batteries or a battery pack having only a single unit battery, and the specific structure of the battery pack can be determined by those skilled in the art according to practical situations.

Fig. 2 is a schematic structural diagram of a battery management device according to an exemplary embodiment of the present application, and as shown in fig. 2, a battery management device 20 includes:

A detection unit 201, which is used for connecting one end with the equipment and the other end with the control unit 202, and when the detection unit 201 is connected with different equipment, different level signals are output; the equipment is power supply equipment or power consumption equipment;

A control unit 202 for determining the devices connected to the detection unit 201 based on the level signal and controlling the charge or discharge state of the battery cells.

In the embodiment of the present application, the detecting unit 201 can be connected to a device, and outputs different level signals when connected to different devices, where the level signals may be signals indicating a level state of the detecting unit 201 or signals indicating a change in the level state of the detecting unit 201, so that the control unit 202 may determine the connected device according to the level signal output by the detecting unit 201, and control the state of the battery unit according to the connected device. Specifically, when it is determined that the detection unit 201 is connected to the power supply apparatus, for example, when the detection unit 201 is connected to the charger, the battery unit is controlled to be in a charged state; when it is determined that the detection unit 201 is connected to the power consumption device, for example, when the detection unit 201 is connected to some movable platforms like an unmanned aerial vehicle, a new energy automobile, etc. which consume electric power, the battery unit is controlled to be in a discharge state. When the battery unit is in a charging state, the battery unit is allowed to acquire electric quantity from external power supply equipment for charging, meanwhile, the battery unit can also discharge to an internal circuit, and the battery unit can be only allowed to acquire electric quantity from the external power supply equipment, so that the battery unit is forbidden to discharge; when the battery unit is in a discharging state, only the battery unit is allowed to discharge, the battery unit is forbidden to acquire electric quantity for charging, and the mutual charging among batteries is avoided. In addition, it should be noted that the detection unit 201 and the control unit 202 may be directly connected, or may be indirectly connected through other devices, and a specific connection manner may be selected according to actual situations, which is not limited in the embodiment of the present application. While how the detection unit 201 changes the level state when connected to the power supply device and the power consumption device will be described in the following embodiments.

It should be further noted that, in the embodiment of the present application, each unit cell constituting the battery pack may be regarded as a battery unit, and the control unit 202 controlling the discharging or charging state of the battery unit may be understood as controlling the discharging or charging state of the unit cell. Since the number of the unit cells may be plural, the number of the control units may be configured to correspond to the number of the unit cells, i.e., one control unit individually manages and controls one unit cell, considering quick and accurate management control of the states of the plural unit cells. Of course, in consideration of the problem of cost, only one control unit may be configured to control the states of all the single batteries, and how to configure the number of the specific control units may be determined by those skilled in the art according to the actual situation, which is not limited herein. In one embodiment, the control unit may be an MCU (Microcontroller Unit, micro control unit).

The level state of the output of the detection unit 201 in fig. 2 in the case of connection with different devices will be described below. In one embodiment, the detection unit 201 may be configured such that the detection unit 201 outputs a high level when connected to a power supply device; when connected to the power consumption device, the detection unit 201 outputs a low level. Of course, the configuration may be reversed, and when the detection unit 201 is connected to the power supply apparatus, the detection unit 201 outputs a low level; when connected to a power consumption device, the detection unit 201 outputs a high level. How to configure, the person skilled in the art can choose according to the requirements. Thereby, it is achieved that the control unit 202 determines that the connected device is a power supply device or a power consumption device according to the level state of the detection unit 201, and correspondingly controls the state of the battery unit. Next, when the detection unit 201 is configured to be connected to the power supply apparatus, the detection unit 201 outputs a high level; when connected to the power consumption device, the detection unit 201 outputs a low level, for example, to explain the description.

Fig. 3 is a schematic diagram showing connection between the detection unit 201 and the device, the control unit 202, and the battery unit according to an exemplary embodiment of the present application, and as shown in fig. 3, the detection unit 201 is connected to the battery unit 203, the device 204, and the control unit 202, respectively. When the device 204 connected to the detection unit 201 is a power consumption device, the control unit 202 may control the state of the battery unit to be a discharge state according to the low level signal output by the detection unit 201; when the device 204 to which the detection unit 201 is connected is a power supply device, the control unit 202 may control the state of the battery unit to be a charged state according to a high level signal output from the detection unit 201. In one embodiment, the detection unit may include a first impedance, and the second end of the first impedance is connected to the device and the control unit, respectively, by connecting the first end of the first impedance to the battery unit, such that the control unit determines the connected device by the received level state of the second end of the first impedance.

In the following, a schematic diagram of the detection unit shown in fig. 4 is taken as an example, to further explain how the connected device is determined according to the level state of the detection unit 201.

As shown in fig. 4, the detection unit 201 includes a first impedance 401, a second impedance 402, a first capacitor 403, and a static eliminator 404. Wherein the second impedance 402 is much smaller than the first impedance 401. Meanwhile, it should be noted that, the PS end shown in fig. 4 is a connection end between the battery and the device, for example, the unmanned aerial vehicle or the charger may be connected to the PS end, and the ps_mcu end is a connection end between the detection unit 201 and the control unit. The first end of the first impedance 401 is connected to a battery cell that applies a stable DVCC level to the first end of the first impedance 401. When the PS terminal is not connected to the device, the PS terminal is in a suspended state, and at this time, since the first terminal of the first impedance 401 is applied with a stable DVCC level, the PS terminal is at a high level, so that the ps_mcu terminal connected to the control unit is also at a high level. When the PS terminal is connected with the power supply equipment, for example, when the PS terminal is connected with the charger, the power supply voltage of the charger is slightly higher than the voltage of the battery unit, so that the level of the PS terminal is increased compared with the original level, and the corresponding PS_MCU terminal level is also increased, therefore, the control unit can determine that the accessed equipment is the power supply equipment according to the rising edge signal acquired from the PS_MCU terminal, and when the power supply equipment is determined to be accessed, the state of the battery unit is controlled to be a charging state; when the PS terminal is connected to a power consumption device, for example, the PS terminal is connected to the unmanned aerial vehicle, the unmanned aerial vehicle cannot provide a voltage, so that the PS terminal is equivalent to being connected to the ground, at this time, the PS terminal is changed from a high level to a low level, and the second impedance 402 is far smaller than the first impedance 401, so that the corresponding ps_mcu terminal is also changed from a high level to a low level. Therefore, the control unit can determine that the accessed device is the power consumption device according to the falling edge signal acquired from the PS_MCU end, and when the power consumption device is determined to be accessed, the state of the battery unit is controlled to be a discharging state, and the charging of the battery unit is forbidden.

While it is considered that many different signals are often mixed in the circuit, only certain specific signals are usually needed in actual use, so that the circuit needs to be filtered to remove some useless signals in the circuit. Therefore, the circuit diagram of the detecting unit 201 shown in fig. 4 further includes a filtering device, which is an RC filtering circuit, and the RC filtering circuit is formed by connecting a second resistor 402 and a first capacitor 403 in series, where the second resistor 402 is connected between the PS terminal and the ps_mcu terminal, and the first capacitor 403 is connected between the ps_mcu terminal and ground. It should be noted that, in order to realize the filtering function and ensure that a falling edge signal that jumps from a high level to a low level is generated when the power consumption device is connected, the second impedance 402 needs to be set to be far smaller than the first impedance 401, that is, ensure that the ps_mcu terminal also jumps to a low level when the PS terminal is on the ground plane. The first impedance 401 and the second impedance 402 are specifically set to what values, and what ratio or magnitude relation is satisfied, so that those skilled in the art can set the values according to the actual situation, and the present application is not limited herein. Meanwhile, when considering the influence of static electricity on current, in order to avoid the damage of static electricity to dust, static discharge and the like, a static electricity removing device is also required to be arranged. In the circuit diagram of the detecting unit 40 shown in fig. 4, a static eliminating device 404 is further included, where the static eliminating device 404 is formed by a pair of back-connected diodes, and the static eliminating device 404 is connected to the ground to eliminate static charges in the circuit.

It will be appreciated that in the embodiment shown in fig. 4, the filtering device and the static electricity removing device may not be included, and at this time, the control unit may still control the state of the battery unit according to the level output by the ps_mcu terminal. The filtering means and the static removing means may be selected to be configured in consideration of the protection requirement of the circuit and the acquisition requirement of the signal, and thus, for the filtering means and the static removing means in fig. 4, a person skilled in the art may select whether to be configured according to the requirement. In addition, in one embodiment, the first impedance 401 and the second impedance 402 shown in fig. 4 may be resistors, where the number of resistors may be one or multiple, and of course, may be other impedance element or elements.

By the detection unit shown in fig. 4, it is possible to accurately detect whether the device connected with the battery is a power consumption device, but since the PS end is at a high level when suspended, the level becomes high when connected with the power supply device, but the rising edge signal may be small and difficult to detect due to the small variation amplitude of the level state, so that it may not be possible to accurately detect whether the battery is connected with the power supply device by means of the detection unit in fig. 4. In order to accurately detect whether the battery is connected with the power supply equipment or not so as to control the power supply state of the battery more accurately, the embodiment of the application also provides a battery management device, and the battery management device is mainly added with a detection unit for detecting the connection condition of the power supply equipment on the basis of the detection unit shown in fig. 4, referring to fig. 5.

Fig. 5 is a schematic structural diagram of another battery management device according to an exemplary embodiment of the present application, and as shown in fig. 5, the battery management device 50 includes:

The detection unit 501, wherein the detection unit 501 includes a first detection subunit 5011 and a second detection subunit 5012, the first detection subunit 5011 is used for connecting one end with a device, and the other end is connected with the control unit 502, and the first detection subunit 5011 outputs different level states when connected with different devices; the device is a power supply device or a power consumption device, and the first detection subunit 5011 is mainly configured to output different level states according to whether the power consumption device is connected.

The second detection subunit 5012 is configured to have one end connected to the device and the other end connected to the control unit 502, where the second detection subunit 5012 outputs different level states when connected to different devices, and is mainly configured to output different level states according to whether the power supply device is connected or not;

a control unit 502 for determining a device to which the detection unit 501 is connected based on the level states output from the first detection subunit 5011 and the second detection subunit 5012 to control the discharge or charge state of the battery unit.

The first detecting subunit 5011 is mainly used for detecting whether a power consumption device is connected, and functions the same as that of the detecting unit 201 in fig. 2, so reference may be made to the description of the detecting unit 201 in the above embodiment, for example, the circuit diagram shown in fig. 4 may also be regarded as an implementation manner of the first detecting subunit 5011, and no repeated description is made on how the first detecting subunit 5011 detects the power consumption device. The following description will be mainly directed to the second detection subunit 5012.

In the embodiment of the present application, the second detecting subunit 5012 outputs different level states when connected to different devices, and in particular, the control unit 502 may determine whether to connect to the power supply device according to the level state of the second detecting subunit 5012 and control the battery unit to be in a charging state when connected to the power supply device according to whether the power supply device is connected to output different levels. For example, the second detection subunit 5012 controls the battery unit to be in a charged state when it is connected to the charger. Next, how the level state changes specifically when the second detection subunit 5012 is connected to the power supply apparatus will be described.

In one embodiment, when the second detection subunit 5012 is connected to the power supply apparatus, the level state of the second detection subunit 5012 changes from high level to low level, whereby the control unit 502 can determine whether to connect to the power supply apparatus according to the level state of the second detection subunit 5012. Of course, when the second detection subunit 5012 is configured to be connected to a power supply device, the level state of the second detection subunit 5012 may be changed from low to high, and the person skilled in the art may select how to configure the configuration as required. Next, when the second detection subunit 5012 is configured to be connected to a power supply apparatus, the level state of the second detection subunit 5012 changes from high to low.

Fig. 6 is a schematic diagram illustrating connection between the detection unit 501, the first detection subunit 5011, the second detection subunit 5012, the device, the control unit 502, and the battery unit according to an exemplary embodiment of the present application, where, as shown in fig. 6, the detection unit 501 is connected to the battery unit 505, the device 503, and the control unit 502, respectively. When the device 503 connected to the detection unit 501 is a power consumption device, the control unit 502 may control the state of the battery unit to be a discharge state according to the low level signal output by the first detection subunit 5011; when the device 503 connected to the detection unit 501 is a power supply device, the control unit 502 may control the state of the battery unit to be a charged state according to the low level signal output by the second detection subunit 5012. In one embodiment, the second detection subunit 5012 may comprise a switching means for connecting with the device 504 and the third impedance and being turned on when connected with the power supply device, and a third impedance, the first end of the third impedance being connected with the battery unit 505, the second end being connected in parallel with the control unit 502. Thus, the control unit 502 may determine whether the connected device is a power supply device according to the received level state of the third impedance.

In the following, a schematic structural diagram of the second detection subunit shown in fig. 7 is taken as an example, to further explain how the connected device is determined according to the level state of the second detection subunit.

As shown in fig. 7, the second detection subunit 5012 includes a third impedance 701, a switching device 702, a fourth impedance 703, a fifth impedance 704, a second capacitor 705, a third capacitor 706, and a static eliminator 707. It should be noted that, the PACK end shown IN fig. 7 is a battery and device connection end, the PACK end and the PS end shown IN fig. 4 are two independent ends, the PACK end can be connected to an unmanned aerial vehicle or a charger as well, and the CHARGER _in end is a connection end with a control unit. The first end of the third impedance 701 is connected to a battery cell, which applies a stable DVCC level to the first end of the third impedance 701. The switching device 702 is an N-channel field effect transistor, the drain of which is connected to the third impedance 701, the gate of which is connected to both the fourth impedance 703 and the fifth impedance 704, and the source of which is grounded.

When the PACK end is not connected with the equipment, the PACK end is in a suspended state, and at the moment, the PACK end is in a low level, namely the grid level of the N-channel field effect transistor is in a low level, and the source level of the N-channel field effect transistor is in a low level because of the source grounding surface of the N-channel field effect transistor. According to the characteristics of the N-channel field effect transistor (the N-channel field effect transistor is turned on when the gate level is greater than the source level), the N-channel field effect transistor cannot be turned on at this time, that is, the drain and the source of the N-channel field effect transistor are disconnected at this time, and since the first end of the third impedance is applied with a stable DVCC level, the drain of the N-channel field effect transistor is at a high level, and at this time, the CHARGER _in port connected to the control unit is also at a high level.

When the PACK end is connected with the power supply device, the power supply device is at a high level, so that the grid electrode of the N-channel field effect transistor connected with the PACK end through the fourth impedance 703 is also changed from a low level to a high level, at this time, the grid electrode level of the N-channel field effect transistor is greater than the source electrode level due to the source electrode grounding surface of the N-channel field effect transistor, and the N-channel field effect transistor is IN a conducting state, so that the drain electrode level of the N-channel field effect transistor originally at a high level jumps to a low level, and therefore when the PACK end is connected with the power supply device, a falling edge signal which jumps from the high level to the low level is generated at the drain electrode of the N-channel field effect transistor, namely the CHARGER _in port connected with the control unit, and the control unit can determine whether the device connected with the battery is the power supply device according to the collected falling edge signal. It should be noted that, since the power supply device generally needs to have a higher level than the battery cell level, the control unit needs to ensure that the PACK terminal level is higher than the battery cell level when the falling edge signal is acquired.

It can be seen that the control unit may determine whether to connect the power supply device according to the PACK end level state and the CHARGER _in end level state change caused by the change thereof IN the second detection subunit 5012 shown IN fig. 7. However, for a battery PACK composed of parallel single batteries, the second detection subunit 5012 is only dependent on the second detection subunit 5012, so that the accurate judgment cannot be completed, because in the battery PACK composed of parallel single batteries, the electric potential of each single battery is different, when the battery PACK is connected with a power consumption device, the battery PACK supplies power to the power consumption device through the PACK end, when the single battery with high electric potential supplies power to the power consumption device through the PACK end, for the single battery with low electric potential in the battery PACK, the second detection subunit 5012 also detects that the PACK end is changed from low level to high level, and the level of the PACK end is higher than that of the single battery, thereby causing the control unit to misjudge that the connected device is the power supply device, and control the single battery with low electric potential to enter the charging state.

For this problem, the control unit may be configured to determine whether the battery is connected to the power supply apparatus in conjunction with the first detection subunit 5011 and the second detection subunit 5012. Specifically, the determination may be made by combining fig. 4 and fig. 7 that the battery is connected to the power supply apparatus when the following condition is satisfied:

(1) The control unit collects a falling edge signal from a CHARGER _IN end;

(2) The ps_mcu side is detected as high.

The control unit controls the battery unit to enter the charged state only when the above 2 conditions are satisfied at the same time, and does not allow the battery to enter the charged state if the above 2 conditions are not satisfied. Since the ps_mcu terminal is detected to be high level, it can be determined that the battery is not connected to the power consumption device, and at this time, if the falling edge signal is collected from the CHARGER _in terminal, it can be determined that the power supply device is connected to the battery. Therefore, the battery pack composed of the parallel single batteries is judged by combining the first detection subunit 5011 and the second detection subunit 5012, so that erroneous judgment can be avoided when the low-potential batteries in the battery pack composed of the parallel single batteries are controlled and managed. IN some alternative examples, for some battery PACKs composed of serial single batteries, the PACK terminal level may also be detected when a falling edge signal is collected from the CHARGER _in terminal, and when it is determined that the PACK terminal level is higher than the battery cell level, connection of the power supply device is determined.

In view of protecting the switching device 702 in the second detection subunit 5012, a protection device including a fourth impedance 703 and a fifth impedance 704 is further provided in the second detection subunit 5012, which is mainly used for avoiding that when the PACK end is connected to the power supply device, the level of the power supply device is too high to exceed the working range of the switching device 702, for example, when the switching device is an N-channel fet, the power supply device level exceeds the maximum working voltage of the N-channel fet gate, which results in damage to the N-channel fet, and by providing the fourth impedance 703 and the fifth impedance 704, the voltage of the level input by the power supply device can be divided, and how the fourth impedance 703 and the fifth impedance 704 are set is determined according to the actual working parameters of the switching device, which is not limited herein. Similarly to fig. 4, the second detecting subunit 5012 is also provided with a filtering device and a static eliminating device, where the filtering device includes a second capacitor 705 and a third capacitor 706, and the static eliminating device 707 is a pair of back-connected diodes, and in this embodiment, the filtering device and the static eliminating device function similarly to those of fig. 4, and reference may be made to the related descriptions of the filtering device and the static eliminating device in fig. 4, which are not repeated herein. And the filtering device and the static eliminating device in fig. 7 can be selected by a person skilled in the art according to the requirements. In one embodiment, the third impedance 701 and the fourth impedance 703 and the fifth impedance 704 shown in fig. 7 may be resistors, where the number of resistors may be one or multiple, and of course, may be other impedance element or elements.

It will be appreciated that the present application is not limited to the detection unit 501 necessarily comprising both the first detection subunit 5011 and the second detection subunit 5012, and that the detection unit 501 comprises both the first detection subunit 5011 and the second detection subunit 5012 is just one preferred example, and that in some alternative embodiments, the detection unit 501 may comprise only the first detection subunit 5011, wherein the first detection subunit 5011 may refer to the relevant description of the detection unit 201; or the detection unit 501 may also comprise only the second detection subunit 5012. The application is not limited in this regard.

The embodiment of the application also provides a battery management system, wherein the battery management system comprises a battery management device and a battery, and the battery comprises a battery unit. The battery management device included in the battery management system of the present embodiment may refer to the related description of the battery management device of the above embodiment, and the description thereof will not be repeated here. Fig. 8 shows a battery management system according to an exemplary embodiment of the present application, where, as shown in fig. 8, a battery management device 801 and a battery 802 are included in the battery management system 80, the battery 802 includes a battery unit 8021, and the battery management device 801 manages charging and discharging of the battery unit 8021.

The embodiment of the application also provides a battery, which comprises a battery management device and a battery unit. The battery management device mounted on the battery in this embodiment can be referred to the description of the battery management device in the above embodiment, and the description thereof will not be repeated here. Fig. 9 shows a battery according to an exemplary embodiment of the present application, and as shown in fig. 9, a battery 90 includes a battery management device 901 and a battery unit 902, and charging and discharging of the battery unit 902 are managed by the battery management device 901.

The embodiment of the present application further provides a mobile platform, where the mobile platform is provided with the battery shown in fig. 9, and the battery management device provided on the battery may refer to the related description of the battery management device in the above embodiment, and will not be described herein again. Fig. 10 is a movable platform according to an exemplary embodiment of the present application, and as shown in fig. 10, the movable platform 100 includes a battery 90, the battery 90 includes a battery management device 901 and a battery unit 902, and the battery management device 901 manages charging and discharging of the battery unit 902. In some embodiments, the movable platform may be an unmanned aerial vehicle, an unmanned vehicle, a mobile robot, a new energy automobile, or the like.

The embodiment of the application also provides a method for charge and discharge management, which can refer to fig. 11, and comprises the following steps:

s11, connecting the device with a detection unit, wherein the detection unit outputs different level signals when connecting different devices; the equipment is power supply equipment or power consumption equipment;

And S12, determining the equipment connected with the detection unit based on the level signal, and controlling the charging or discharging state of the battery unit.

In one embodiment, the power supply device is a charger and the power consumption device is a mobile platform.

In one embodiment, the battery unit is in a charged state when the detection unit is connected with a power supply device; when the detection unit is connected with the power consumption equipment, the battery unit is in a discharging state.

In one embodiment, the detection unit comprises a first detection subunit; and when the first detection subunit outputs a low-level signal, the control unit determines that the equipment connected with the detection unit is the power consumption equipment.

In one embodiment, the detection unit comprises a second detection subunit; and the control unit determines that the equipment connected with the detection unit is power supply equipment when the first detection subunit outputs a high-level signal and the second detection subunit outputs a low-level signal.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted across a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). Computer readable storage media can be any available media that can be accessed by a computer or data storage devices, such as servers, data centers, etc., that contain an integration of one or more available media. Usable media may be magnetic media (e.g., floppy disks, hard disks, magnetic tape), optical media (e.g., DVD), or semiconductor media (e.g., solid State Disk (SSD)) or the like.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing has outlined rather broadly the methods and apparatus provided in embodiments of the present application in order that the detailed description of the principles and embodiments of the application may be implemented in conjunction with the specific embodiments; meanwhile, as one skilled in the art will have variations in the specific embodiments and application scope according to the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. A battery management apparatus, comprising:

a control unit for determining the device connected to the detection unit based on the level signal and controlling the charge or discharge state of the battery unit;

When the detection unit is connected with the power supply equipment, the battery unit is in a charging state;

when the detection unit is connected with the power consumption equipment, the battery unit is in a discharging state.

2. The battery management apparatus according to claim 1, wherein the power supply device is a charger and the power consumption device is a movable platform.

3. The battery management device of claim 1, wherein the detection unit comprises a first detection subunit;

And when the first detection subunit outputs a low-level signal, the control unit determines that the equipment connected with the detection unit is the power consumption equipment.

4. A battery management arrangement according to claim 3, wherein the first detection subunit comprises a first impedance and a first voltage source, the first impedance being for connection at one end to the first voltage source and at the other end to the device and the control unit, respectively.

5. The battery management device of claim 4 wherein the first detection subunit further comprises filtering means;

The filter device is an RC filter circuit, and the RC filter circuit comprises a second impedance and a first capacitor;

the second impedance is used for being connected between the equipment and the control unit;

The first capacitor is used for being connected between the control unit and the ground; wherein the second impedance is less than the first impedance.

6. The battery management device of claim 5 wherein the first impedance and the second impedance are resistors.

7. The battery management device of claim 3 wherein the detection unit comprises a second detection subunit;

And the control unit determines that the equipment connected with the detection unit is power supply equipment when the first detection subunit outputs a high-level signal and the second detection subunit outputs a low-level signal.

8. The battery management apparatus of claim 7 wherein the second detection subunit comprises a switching means, a second voltage source, and a third impedance, the switching means being for connection with the device and the third impedance and being conductive when connected with the power supply device;

the third impedance is used for connecting one end with the second voltage source and connecting the other end with the control unit in parallel with the switching device.

9. The battery management device of claim 8 wherein the second detection subunit further comprises a protection device;

The protection means comprises a fourth impedance for connection between the switching means and the device; and

A fifth impedance for connection between the switching device and ground;

Wherein the fourth impedance and the fifth impedance are determined according to an operating parameter of the switching device.

10. The battery management device of claim 9 wherein the second detection subunit further comprises a second filtering device;

The second filter means comprises a second capacitor for parallel connection with the fifth impedance and a third capacitor for parallel connection with the switching means.

11. The battery management device of claim 9, wherein the switching device is an N-channel field effect transistor;

And the drain electrode of the N-channel field effect transistor is connected with the third impedance, the grid electrode is simultaneously connected with the fourth impedance and the fifth impedance, and the source electrode is grounded.

12. The battery management device of claim 9 wherein the third impedance, the fourth impedance, and the fifth impedance are resistors.

13. The battery management device of claim 7 wherein the first detection subunit and the second detection subunit each comprise a static-dissipative device.

14. A battery management system comprising a battery management device and a battery, the battery comprising a battery cell;

the battery management device includes:

15. The battery management system of claim 14, wherein the power supply device is a charger and the power consuming device is a mobile platform.

16. The battery management system of claim 14, wherein the detection unit comprises a first detection subunit;

17. The battery management system of claim 16 wherein the first detection subunit comprises a first impedance and a first voltage source, the first impedance for connection to the first voltage source at one end and to the device and the control unit at the other end, respectively.

18. The battery management system of claim 17 wherein the first detection subunit further comprises filtering means;

19. The battery management system of claim 18 wherein the first impedance and the second impedance are resistors.

20. The battery management system of claim 16 wherein the detection unit comprises a second detection subunit;

21. The battery management system of claim 20 wherein the second detection subunit comprises a switching device, a second voltage source, and a third impedance, the switching device being configured to be coupled to the apparatus and the third impedance and to be turned on when coupled to the power supply apparatus;

22. The battery management system of claim 21 wherein the second detection subunit further comprises a protection device;

A fifth impedance for connection between the switching device and ground;

23. The battery management system of claim 22 wherein the second detection subunit further comprises a second filtering means;

24. The battery management system of claim 23, wherein the switching device is an N-channel field effect transistor;

25. The battery management system of claim 22 wherein the third impedance, the fourth impedance, and the fifth impedance are resistors.

26. The battery management system of claim 20 wherein the first detection subunit and the second detection subunit each comprise a static-dissipative device.

27. A battery, the battery comprising a battery cell and a battery management device, the battery management device comprising:

28. The battery of claim 27, wherein the power device is a charger and the power consuming device is a removable platform.

29. The battery of claim 27, wherein the detection unit comprises a first detection subunit;

30. The battery of claim 29, wherein the first detection subunit comprises a first impedance and a first voltage source, the first impedance for connection to the first voltage source at one end and to the device and the control unit at the other end, respectively.

31. The battery of claim 30, wherein the first detection subunit further comprises filtering means;

32. The battery of claim 31, wherein the first impedance and the second impedance are resistors.

33. The battery of claim 29, wherein the detection unit comprises a second detection subunit;

34. The battery of claim 33, wherein the second detection subunit comprises a switching device, a second voltage source, and a third impedance, the switching device being configured to be coupled to the apparatus and the third impedance and to be turned on when coupled to the power supply apparatus;

35. The battery of claim 34, wherein the second detection subunit further comprises a protection device;

A fifth impedance for connection between the switching device and ground;

36. The battery of claim 35, wherein the second detection subunit further comprises a second filtering device;

37. The battery of claim 35, wherein the switching device is an N-channel field effect transistor;

38. The battery of claim 35, wherein the third impedance, the fourth impedance, and the fifth impedance are resistors.

39. The battery of claim 33, wherein the first detection subunit and the second detection subunit each comprise a static-dissipative device.

40. A mobile platform, wherein a battery is mounted on the mobile platform, the battery comprising a battery unit and a battery management device, the battery management device comprising:

41. The mobile platform as recited in claim 40, wherein the power device is a charger and the power consumption device is the mobile platform.

42. The mobile platform of claim 40, wherein the detection unit comprises a first detection subunit;

43. The mobile platform of claim 42, wherein the first detection subunit comprises a first impedance and a first voltage source, the first impedance being configured to be connected to the first voltage source at one end and to the device and the control unit at the other end, respectively.

44. The mobile platform as in claim 43, wherein the first detection subunit further comprises filtering means;

45. The movable platform of claim 44, wherein the first impedance and the second impedance are resistors.

46. The mobile platform of claim 42, wherein the detection unit comprises a second detection subunit;

47. The mobile platform of claim 46, wherein the second detection subunit comprises a switching device, a second voltage source, and a third impedance, the switching device being configured to be coupled to the apparatus and the third impedance and to be turned on when coupled to the power supply apparatus;

48. The mobile platform of claim 47, wherein the second detection subunit further comprises a protection device;

A fifth impedance for connection between the switching device and ground;

49. The mobile platform as recited in claim 48, wherein the second detection subunit further comprises a second filtering device;

50. The movable platform of claim 48, wherein the switching device is an N-channel FET;

51. The movable platform of claim 48, wherein the third impedance, the fourth impedance, and the fifth impedance are resistors.

52. The mobile platform of claim 46, wherein the first detection subunit and the second detection subunit each comprise a static-dissipative device.

53. A method of charge and discharge management, comprising:

determining equipment connected with the detection unit based on the level signal, and controlling the charging or discharging state of the battery unit;

54. The method of claim 53, wherein the power device is a charger and the power consuming device is a mobile platform.

55. The method of claim 54, wherein the detection unit comprises a first detection subunit; the device for determining the connection of the detection unit based on the level signal comprises:

And when the first detection subunit outputs a low-level signal, determining that the equipment connected with the detection unit is the power consumption equipment.

56. The method of claim 55, wherein the detection unit comprises a second detection subunit; the detection unit comprises a first detection subunit; the apparatus for determining connection of the detection unit based on the level signal further includes:

and when the first detection subunit outputs a high-level signal and the second detection subunit outputs a low-level signal, determining that the equipment connected with the detection unit is power supply equipment.

57. A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 53-56.

58. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 53-56.