CN219937963U

CN219937963U - Charge-discharge control switch, charge-discharge control device, battery pack and aircraft

Info

Publication number: CN219937963U
Application number: CN202223149567.4U
Authority: CN
Inventors: 田瑜; 宋永明; 翁志福
Original assignee: Autoflight Kunshan Co Ltd
Current assignee: Autoflight Kunshan Co Ltd
Priority date: 2022-11-25
Filing date: 2022-11-25
Publication date: 2023-10-31
Anticipated expiration: 2032-11-25

Abstract

The embodiment of the disclosure provides a charge-discharge control switch, a charge-discharge control device, a battery pack and an aircraft. The charge-discharge control switch includes: a driving circuit and a switching unit; the driving circuit is in communication connection with the micro control unit; the input end of the driving circuit is connected with a preset power supply; the output end of the driving circuit is connected with the first end of the switch unit; the second end of the switch unit is connected with the negative electrode of the battery module, and the third end of the switch unit is connected with the negative electrode of the load of the battery module; the driving circuit is used for controlling the switch unit to be opened or closed according to the charge and discharge control signals when receiving the charge and discharge control signals sent by the micro control unit; the volume of the switch unit is smaller than that of the relay, and the weight of the switch unit is smaller than that of the relay. The charge and discharge control switch of the embodiment of the disclosure can reduce the weight of the battery pack and improve the energy density of the battery pack.

Description

Charge-discharge control switch, charge-discharge control device, battery pack and aircraft

Technical Field

The embodiment of the disclosure relates to the technical field of aircrafts, in particular to a charge-discharge control switch, a charge-discharge control device, a battery pack and an aircraft.

Background

With the continuous development of new energy technology, new energy is gradually applied to aircrafts as power energy. In the field of aircraft, the weight of the product is important. A battery pack used on an aircraft generally includes a battery module and a battery management control device. The battery module is used for providing power, and the battery management control device is used for managing battery work, such as collecting battery module information, controlling battery module charging and discharging and the like.

At present, the battery management control device mainly adopts a positive and negative relay mode to control the charge and discharge of the battery pack, but the battery pack has larger weight and smaller energy density due to the large volume and the large weight of the relay.

Disclosure of Invention

The utility model provides a charge-discharge control switch, charge-discharge control device, battery package and aircraft for solve at present because the relay is bulky, and weight is big, leads to the weight of battery package great, the battery package energy density also less problem.

A first aspect of an embodiment of the present disclosure provides a charge-discharge control switch, including: a driving circuit and a switching unit;

the driving circuit is in communication connection with the micro control unit; the input end of the driving circuit is connected with a preset power supply; the output end of the driving circuit is connected with the first end of the switch unit;

the second end of the switch unit is connected with the negative electrode of the battery module, and the third end of the switch unit is connected with the negative electrode of the load of the battery module;

the driving circuit is used for controlling the switch unit to be opened or closed according to the charge and discharge control signals when receiving the charge and discharge control signals sent by the micro control unit;

the volume of the switch unit is smaller than that of the relay, and the weight of the switch unit is smaller than that of the relay.

Optionally, the charge-discharge control switch as described above, the switch unit includes a charge switch group and a discharge switch group connected to each other; the charging switch group comprises at least one charging switch; the discharge switch group comprises at least one discharge switch;

the first end of the discharging switch group is connected with the output end of the driving circuit, the second end of the discharging switch group is connected with the second end of the charging switch group, and the third end of the discharging switch group is connected with the negative electrode of the battery module;

the first end of the charging switch group is connected with the output end of the driving circuit, the second end of the charging switch group is connected with the second end of the discharging switch group, and the third end of the charging switch group is connected with the negative electrode of the load of the battery module.

Optionally, as described above, the charge switch and the discharge switch are MOS transistors of the same type; the charging switch is one; the discharge switch is one;

the output end of the driving circuit is connected with the grid electrode of the charging switch, and the output end of the driving circuit is connected with the grid electrode of the discharging switch;

according to the type of the MOS tube, one end of a source electrode or a drain electrode of the discharging switch is connected with one end of the source electrode or the drain electrode of the charging switch; one end of the discharging switch and one end of the charging switch are both sources or drains;

the other end of the source electrode or the drain electrode of the discharging switch is connected with the negative electrode of the battery module, and the other end of the source electrode or the drain electrode of the charging switch is connected with the negative electrode of the load of the battery module.

Optionally, as described above, the charge switch and the discharge switch are NMOS transistors;

the source electrode of the discharging switch is connected with the negative electrode of the battery module, and the drain electrode of the discharging switch is connected with the drain electrode of the charging switch; and the source electrode of the charging switch is connected with the negative electrode of the load.

Optionally, as described above, the charge switch and the discharge switch are PMOS transistors;

the drain electrode of the discharging switch is connected with the negative electrode of the battery module, and the source electrode of the discharging switch is connected with the source electrode of the charging switch; and the drain electrode of the charging switch is connected with the negative electrode of the load.

Optionally, the charge-discharge control switch as described above, the driving circuit includes: the charging output circuit is connected with the charging output circuit;

the control module is connected with the charging output circuit, and the control module is connected with the discharging output circuit; the control module is in communication connection with the micro control unit;

the charging output circuit is connected with the discharging output circuit in parallel; the input end of the charging output circuit is connected with the preset power supply, and the output end of the charging output circuit is connected with the grid electrode of the charging switch; the input end of the discharge output circuit is connected with the preset power supply, and the output end of the discharge output circuit is connected with the grid electrode of the discharge switch;

the control module is used for controlling the charge output circuit to output voltage or not to output voltage according to the charge and discharge control signal when receiving the charge and discharge control signal of the micro control unit, and/or controlling the discharge output circuit to output voltage or not to output voltage.

Optionally, in the charge-discharge control switch as described above, if the charge-discharge control signal is high-efficiency charge or high-efficiency discharge, the control unit is further configured to control the charge output circuit and the discharge output circuit to output voltages at the same time;

if the charge and discharge control signal is low-efficiency charge, the control unit is further configured to control only the output voltage of the charge output circuit;

if the charge and discharge control signal is low-efficiency discharge, the control unit is further configured to control only the discharge output circuit to output voltage.

A second aspect of an embodiment of the present disclosure provides a charge and discharge control device, including: the micro control unit, the sampling unit, the preset power supply and the charge-discharge control switch according to any one of the first aspect;

the sampling unit is in communication connection with the micro control unit; the micro control unit is in communication connection with the charge-discharge control switch; the preset power supply is connected with the input end of the charge-discharge control switch;

the sampling unit is used for collecting state information of the battery module and sending the state information to the micro control unit;

the micro control unit is used for judging whether the battery module meets a preset charging condition or a preset discharging condition according to the state information, and sending a corresponding charging and discharging control signal to the charging and discharging control switch according to a judging result;

the charge-discharge control switch is used for controlling the connection state between the battery module and the load according to the charge-discharge control signal.

A third aspect of the disclosed embodiments provides a battery pack, comprising: a battery module and a charge-discharge control device as described in the second aspect;

the charge and discharge control device is used for controlling the charge and discharge of the battery module.

A fourth aspect of an embodiment of the present disclosure provides an aircraft, comprising: a power plant and a battery pack as described in the third aspect;

the battery pack is used for providing energy for the power equipment.

The embodiment of the disclosure provides a charge-discharge control switch, a charge-discharge control device, a battery pack and an aircraft. The charge-discharge control switch includes: a driving circuit and a switching unit; the driving circuit is in communication connection with the micro control unit; the input end of the driving circuit is connected with a preset power supply; the output end of the driving circuit is connected with the first end of the switch unit; the second end of the switch unit is connected with the negative electrode of the battery module, and the third end of the switch unit is connected with the negative electrode of the load of the battery module; the driving circuit is used for controlling the switch unit to be opened or closed according to the charge and discharge control signals when receiving the charge and discharge control signals sent by the micro control unit; the volume of the switch unit is smaller than that of the relay, and the weight of the switch unit is smaller than that of the relay. The charge and discharge control switch comprises a driving circuit and a switch unit, wherein the driving circuit is used for controlling the switch unit to be opened or closed according to a charge and discharge control signal sent by the micro control unit when receiving the charge and discharge control signal, so as to realize charge and discharge control of the battery module. Meanwhile, the volume of the switch unit is smaller than that of the relay, and the weight of the switch unit is smaller than that of the relay, so that the weight of the battery pack can be reduced, and the energy density of the battery pack can be improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural diagram of a charge-discharge control switch provided in the present disclosure;

fig. 2 is a schematic structural diagram of an external connection relationship including a charge-discharge control switch provided in the present disclosure;

fig. 3 is a schematic structural diagram II including an external connection relationship of a charge-discharge control switch provided in the present disclosure;

fig. 4 is a schematic structural diagram III including an external connection relationship of a charge-discharge control switch provided in the present disclosure;

fig. 5 is a schematic structural diagram IV including an external connection relationship of a charge-discharge control switch provided in the present disclosure;

fig. 6 is a schematic structural diagram of an external connection relationship including a charge and discharge control device provided in the present disclosure;

fig. 7 is a schematic structural diagram of the battery pack external connection relationship provided in the present disclosure;

fig. 8 is a schematic structural view of an aircraft provided by the present disclosure.

Symbol description:

100. a charge-discharge control switch; 110. a driving circuit; 120. a switching unit; 121. a charging switch group; 122. a discharge switch group; 123. an NMOS tube charging switch; 124. an NMOS tube discharge switch; 125. a PMOS tube charging switch; 126. a PMOS tube discharge switch; 200. a micro control unit; 300. presetting a power supply VCC; 400. a battery module; 500. a load; 600. a sampling unit; 700. a charge/discharge control device; 800. a battery pack; 810. a power plant; 900. an aircraft.

Specific embodiments of the present disclosure have been shown by way of the above drawings and will be described in more detail below. These drawings and the written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the disclosed concepts to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

The technical scheme of the present disclosure is described in detail below with specific examples. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present disclosure will be described below with reference to the accompanying drawings.

It should be noted that the brief description of the terminology in the present utility model is for the purpose of facilitating understanding of the embodiments described below only and is not intended to limit the embodiments of the present utility model. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the utility model are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

For a clear understanding of the technical solutions of the present utility model, the prior art solutions will be described in detail first. With the continuous development of new energy technology, new energy is gradually becoming a power energy source for many passing tools, transportation tools, exploration tools and the like, and is applied to the field of aircrafts. The electric energy commonly used in the new energy source is generally to continuously supply electric energy to power equipment such as a motor through a battery pack, so as to provide power required for movement for the aircraft. The battery pack generally comprises a battery module, a battery management system and other components, and the battery management system comprises relevant devices for charging and discharging batteries. At present, the charge and discharge of the battery pack are mainly controlled by adopting a positive-negative relay mode, and the weight requirement of the aircraft in the field of aircrafts is high, and the relay is large in size and weight, so that the weight of the battery pack is large, the energy density of the battery pack is small, and the requirement of the aircraft on the weight cannot be met.

Therefore, the inventor finds in the research that in order to solve the technical problems that the relay is large in size and weight, so that the weight of the battery pack is large and the energy density of the battery pack is small, the relay can be changed into other switching devices, and the switching devices with smaller size and weight are selected, so that the original charge and discharge control function can be maintained, the size is smaller, the weight is smaller, and the energy density of the battery pack can be improved.

Specifically, the charge-discharge control switch includes: a driving circuit and a switching unit. The driving circuit is in communication connection with the micro control unit, and the input end of the driving circuit is connected with a preset power supply. The output end of the driving circuit is connected with the first end of the switch unit.

The second end of the switch unit is connected with the negative electrode of the battery module, and the third end of the switch unit is connected with the negative electrode of the load of the battery module. The driving circuit is used for controlling the switch unit to be opened or closed according to the charge and discharge control signals when the charge and discharge control signals sent by the micro control unit are received. The volume of the switch unit is smaller than that of the relay, and the weight of the switch unit is smaller than that of the relay.

The charge and discharge control switch comprises a driving circuit and a switch unit, wherein the driving circuit is used for controlling the switch unit to be opened or closed according to a charge and discharge control signal sent by the micro control unit when receiving the charge and discharge control signal, so as to realize charge and discharge control of the battery module. Meanwhile, the volume of the switch unit is smaller than that of the relay, and the weight of the switch unit is smaller than that of the relay, so that the weight of the battery pack can be reduced, and the energy density of the battery pack can be improved.

The inventor proposes the technical scheme of the utility model based on the creative discovery.

Embodiments of the present disclosure are described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a charge-discharge control switch provided in the present disclosure. Fig. 2 is a schematic diagram of an external connection relationship including a charge-discharge control switch provided in the present disclosure, as shown in fig. 1, in this embodiment, the charge-discharge control switch 100 includes a driving circuit 110 and a switch unit 120. As shown in fig. 2, the connection relationship and the function of the charge/discharge control switch 100 provided in this embodiment are specifically as follows:

the driving circuit 110 is communicatively connected to the micro control unit 200. The input end of the driving circuit 110 is connected to a preset power source, and the output end of the driving circuit 110 is connected to the first end of the switching unit 120.

A second end of the switching unit 120 is connected to the negative electrode of the battery module 400, and a third end of the switching unit 120 is connected to the negative electrode of the load 500 of the battery module 400.

The driving circuit 110 is configured to control the switching unit 120 to be opened or closed according to the charge/discharge control signal when receiving the charge/discharge control signal transmitted from the micro control unit 200.

The volume of the switching unit 120 is smaller than the volume of the relay, and the weight of the switching unit 120 is smaller than the weight of the relay.

As shown in fig. 2, the battery module 400 is generally composed of a plurality of unit cells, the positive electrode of the battery module 400 is a common positive electrode of all the unit cells, and the negative electrode of the battery module 400 is a common negative electrode of all the unit cells, as shown in fig. 2, where +represents a common positive electrode and-represents a common negative electrode. The sampling unit 600 is connected with the positive electrode and the negative electrode of the battery module 400, and collects state information such as voltage and temperature of each unit cell of the battery module 400. The specific acquisition mode can be to set up a sensor to each single battery in advance, and realize the state information acquisition to the single battery by acquiring the information of the sensor.

The micro control unit 200 (the english is called Microcontroller Unit, the english is abbreviated as MCU) may be connected with the driving circuit 110 in a communication manner as shown in fig. 2, may be connected with other battery management modules, such as a temperature control module in a communication manner, and may send a temperature control signal to the temperature control module to control the temperature of the battery module 400.

The preset power VCC300 (the english term: volt Current Condenser, chinese term: power supply voltage of the circuit) represents a preset power as the power supply voltage of the driving circuit 110, and the preset power may be a high level power or a low level power, depending on the driving circuit 110 and the switching unit 120. If the switch unit 120 adopts an NMOS (all-N-Metal-Oxide-Semiconductor) tube, the preset power supply generally adopts a high-level power supply, and if the switch unit 120 adopts a PMOS (all-N-positive channel Metal Oxide Semiconductor, P-type Metal-Oxide-Semiconductor) tube, the preset power supply generally adopts a low-level power supply.

The load 500 may be an energy-consuming device, such as a motor, an air conditioner, etc., or a charging device, such as a charger. The positive electrode of the load 500 is connected with the positive electrode of the battery module 400, and the negative electrode of the load 500 is connected with the negative electrode of the battery module 400 through the switching unit 120.

The driving circuit 110 may be a general circuit, and may only control the on or off of the switching unit 120. The switch unit 120 may be a MOS transistor, or an IGBT (all english: insulated Gate Bipolar Transistor, chinese: insulated gate bipolar transistor), or a triode if the capacity of the battery module 400 in the aircraft is smaller.

In practical applications, if the load 500 connected to the battery module 400 is energy-consuming equipment. The sampling unit 600 transmits the acquired state information to the micro control unit 200. The micro control unit 200 may determine whether the current battery module 400 satisfies the conditions of charge and discharge according to the state information. When it is determined that the discharging condition is satisfied, a charging and discharging control signal is sent to the driving circuit 110, and the driving circuit 110 controls the switch unit 120 to be closed, so as to discharge the load 500 from the battery module 400. The conditions for discharging may be preset, for example, the voltage is greater than a preset threshold, the temperature is within a preset threshold, etc.

When discharging, the collecting unit still continues to collect the state information and continuously sends the state information to the micro control unit 200, and if the micro control unit 200 determines that the discharging condition is not satisfied, a charging and discharging control signal is sent to the driving circuit 110, so that the driving circuit 110 controls the switch unit 120 to be turned off. If the energy consumption device is disconnected, the micro-control unit 200 also controls the driving circuit 110 to disconnect the switching unit 120.

If the load 500 connected to the battery module 400 is a charging device. The sampling unit 600 transmits the acquired state information to the micro control unit 200. The micro control unit 200 may determine whether the current battery module 400 satisfies the conditions of charge and discharge according to the state information. When it is determined that the charging condition is satisfied, a charging/discharging control signal is sent to the driving circuit 110, and the driving circuit 110 controls the switch unit 120 to be closed, so as to charge the load 500 of the battery module 400 by the charging device. The charging condition may be preset, for example, the voltage is less than a preset voltage threshold, the temperature is within a preset threshold, and the like.

When charging, the collecting unit still continues to collect the state information and continuously sends the state information to the micro control unit 200, and if the micro control unit 200 determines that the charging condition is not satisfied, a charging and discharging control signal is sent to the driving circuit 110, so that the driving circuit 110 controls the switch unit 120 to be turned off. If the charging device is disconnected, the micro control unit 200 also controls the driving circuit 110 to disconnect the switching unit 120.

The charge and discharge control switch 100 provided in the embodiments of the present disclosure includes a driving circuit 110 and a switch unit 120, where the driving circuit 110 is configured to control the switch unit 120 to be opened or closed according to the charge and discharge control signal when receiving the charge and discharge control signal sent by the micro control unit 200, so as to implement charge and discharge control on the battery module 400. Meanwhile, the switching unit 120 has a smaller volume than the relay and a smaller weight than the relay, so that the weight of the battery pack can be reduced and the energy density of the battery pack can be improved.

Fig. 3 is a schematic diagram of a second structure including an external connection relationship of a charge-discharge control switch according to the present disclosure, as shown in fig. 3, the charge-discharge control switch 100 according to the present embodiment refines the switch unit 120 based on the previous embodiment.

The switching unit 120 of the present embodiment includes a charge switch group 121 and a discharge switch group 122 connected to each other. The charge switch group 121 includes at least one charge switch, and the discharge switch group 122 includes at least one discharge switch.

The first end of the discharging switch set 122 is connected to the output end of the driving circuit 110, the second end is connected to the second end of the charging switch set 121, and the third end is connected to the negative electrode of the battery module 400.

The first end of the charging switch set 121 is connected to the output end of the driving circuit 110, the second end is connected to the second end of the discharging switch set 122, and the third end is connected to the negative electrode of the load 500 of the battery module 400.

In this embodiment, by means of the charging switch group 121 and the discharging switch group 122, the heating problem of the device can be reduced compared with the single switch group, thereby avoiding the heating problem of the device, reducing the service life and even generating damage.

Fig. 4 is a schematic diagram three of an external connection relationship including a charge and discharge control switch provided by the present disclosure, and fig. 5 is a schematic diagram four of an external connection relationship including a charge and discharge control switch provided by the present disclosure. As shown in fig. 4 and 5, the charge-discharge control switch 100 provided in the present embodiment further refines the switch unit 120.

The charging switch and the discharging switch of the embodiment are MOS tubes of the same type. The charging switch is one, and the discharging switch is one.

An output terminal of the driving circuit 110 is connected to a gate of the charge switch, and an output terminal of the driving circuit 110 is connected to a gate of the discharge switch.

According to the type of the MOS tube, one end of a source electrode or a drain electrode of the discharging switch is connected with one end of the source electrode or the drain electrode of the charging switch. One end of the discharging switch and one end of the charging switch are both sources or drains.

The other end of the source or the drain of the discharge switch is connected with the negative electrode of the battery module 400, and the other end of the source or the drain of the charge switch is connected with the negative electrode of the load 500 of the battery module 400.

In the embodiment, the charging switch and the discharging switch adopt MOS tubes, and the MOS tubes have high input impedance, low noise and good thermal stability. Due to its good thermal stability, the battery module 400 has higher heat resistance to heat generated during the charging and discharging processes, and it is difficult to cause a failure of the switch due to a heat generation problem. Meanwhile, the stability and the operability of the charge-discharge control switch 100 are further increased by one charge switch and one discharge switch.

In this embodiment, the MOS transistor may be an NMOS transistor and a PMOS transistor. As shown in fig. 4, the NMOS transistors used for the discharging switch and the charging switch in the figure, that is, the NMOS transistor discharging switch 124 and the NMOS transistor charging switch 123 in the figure.

The source of the NMOS tube discharging switch 124 is connected with the negative electrode of the battery module 400, and the drain of the NMOS tube discharging switch 124 is connected with the drain of the NMOS charging switch. The source of the NMOS transistor charge switch 123 is connected to the negative electrode of the load 500.

When an NMOS transistor is used, the preset power VCC300 may use a high level power, for example, a 12 volt power.

As shown in FIG. 5, the discharging switch and the charging switch in the figure are PMOS tubes, namely a PMOS tube discharging switch 126 and a PMOS tube charging switch 125 in the figure.

The drain electrode of the PMOS tube discharging switch 126 is connected with the negative electrode of the battery module 400, and the source electrode of the PMOS tube discharging switch 126 is connected with the source electrode of the PMOS tube charging switch 125. The drain of the PMOS transistor charge switch 125 is connected to the negative pole of the load 500.

When the PMOS transistor is adopted, the preset power VCC300 may adopt a low-level power supply.

In this embodiment, compared with the NMOS transistor, the NMOS transistor is wider in applicable application scenario, and the occupation area of the NMOS transistor is smaller under the same output current. And the PMOS tube is relatively not easily affected by noise. Different types of MOS tubes are adopted, and each MOS tube has an advantage interval.

Meanwhile, the driving circuit 110 may be further thinned based on the above embodiment. The method comprises the following steps:

the driving circuit 110 includes: the device comprises a control module, a charging output circuit and a discharging output circuit.

The control module is connected with the charging output circuit, and the control module is connected with the discharging output circuit. The control module is communicatively connected to the micro control unit 200.

The charge output circuit is connected in parallel with the discharge output circuit. The input end of the charging output circuit is connected with a preset power supply, and the output end of the charging output circuit is connected with the grid electrode of the charging switch. The input end of the discharging output circuit is connected with a preset power supply, and the output end of the discharging output circuit is connected with the grid electrode of the discharging switch.

The control module is configured to control the charge output circuit to output the voltage or not to output the voltage and/or control the discharge output circuit to output the voltage or not to output the voltage according to the charge/discharge control signal when receiving the charge/discharge control signal of the micro control unit 200.

In this embodiment, the control module may be a control circuit, for example, may be connected between a preset power supply and a discharge output circuit, and connected between the preset power supply and a charge output circuit. Thereby controlling the on-off between the preset power supply and the charging output circuit and the on-off between the preset power supply and the discharging output circuit.

In this embodiment, if the charge/discharge control signal is high-efficiency charge or high-efficiency discharge, the control unit is further configured to control the charge output circuit and the discharge output circuit to output voltages simultaneously.

If the charge-discharge control signal is low-efficiency charge, the control unit is further configured to control only the output voltage of the charge output circuit.

If the charge-discharge control signal is low-efficiency discharge, the control unit is further configured to control only the discharge output circuit to output voltage.

When only the charging output circuit is controlled to output voltage, the charging switch connected with the charging output circuit is turned on, and the discharging switch connected with the discharging output circuit is not turned on, but can conduct current. At this time, the current value charged to the battery module 400 by the charging device is small, which is low-efficiency charging.

Similarly, when only the discharge output circuit is controlled to output voltage, the discharge switch connected with the discharge output circuit is turned on, and the charge switch connected with the charge output circuit is turned on, but can conduct current. At this time, the battery module 400 discharges the energy consumption device with a smaller current value, which is a low-efficiency discharge.

If the charge output circuit and the discharge output circuit are controlled to output voltages at the same time, the discharge switch and the charge switch are turned on at the same time, and at this time, the current conducted between the battery module 400 and the load 500 is large, so that the battery module is charged or discharged with high efficiency.

The charge and discharge control signal may be set by an output level.

In this embodiment, by setting the opening strategies of the charge switch and the discharge switch, the magnitude of the current conducted between the battery module 400 and the load 500 can be controlled according to the actual requirements, so as to improve the applicability of the charge/discharge control switch 100 and the battery pack in the actual application scenario.

Fig. 6 is a schematic structural diagram of an external connection relationship including a charge-discharge control device provided in the present disclosure, as shown in fig. 6, this embodiment provides a charge-discharge control device 700, including: the micro control unit 200, the sampling unit 600, the preset power source, and the charge and discharge control switch 100 in any of the above embodiments.

The sampling unit 600 is communicatively connected to the micro control unit 200. The micro control unit 200 is communicatively connected to the charge-discharge control switch 100. The preset power supply is connected with the input end of the charge-discharge control switch 100.

The sampling unit 600 is used to collect state information of the battery module 400 and transmit the state information to the micro control unit 200.

The micro control unit 200 is configured to determine whether the battery module 400 meets a preset charging condition or a preset discharging condition according to the state information, and send a corresponding charging/discharging control signal to the charging/discharging control switch 100 according to the determination result.

The charge and discharge control switch 100 is used to control the connection state between the battery module 400 and the load 500 according to the charge and discharge control signal.

The charge and discharge control device 700 in this embodiment transmits the collected state information to the micro control unit 200 through the sampling unit 600. The micro control unit 200 may determine whether the current battery module 400 satisfies the conditions of charge and discharge according to the state information. When it is judged that the charge condition is satisfied or the discharge is satisfied, a charge-discharge control signal is transmitted to the charge-discharge control switch 100 to control the connection state between the battery module 400 and the load 500. Since the volume of the charge/discharge control switch 100 is smaller than the volume of the relay and the weight is also smaller than the weight of the relay, the volume and the weight of the charge/discharge control device 700 are also smaller, the weight of the battery pack can be reduced, and the energy density of the battery pack can be improved.

Fig. 7 is a schematic structural diagram of the battery pack external connection relationship provided in the present disclosure, and as shown in fig. 7, the present disclosure further provides a battery pack 800, including: the battery module 400 and the charge and discharge control device 700 of the above embodiment.

The charge and discharge control device 700 is used to control the charge and discharge of the battery module 400.

In the battery pack 800 of the present embodiment, since the volume of the charge/discharge control switch 100 is smaller than the volume of the relay and the weight is also smaller than the weight of the relay, the weight of the battery pack 800 can be reduced and the energy density of the battery pack 800 can be improved.

Fig. 8 is a schematic structural diagram of an aircraft provided by the present disclosure, and as shown in fig. 8, the present disclosure further provides an aircraft 900, including: power device 810 and battery pack 800 as in the previous embodiments.

Battery pack 800 is used to power a power device 810.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with equivalents. Such modifications and substitutions do not depart from the spirit of the utility model.

Other implementations of the disclosed embodiments will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosed embodiments following, in general, the principles of the disclosed embodiments and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosed embodiments pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosed embodiments being indicated by the following claims.

It is to be understood that the disclosed embodiments are not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the embodiments of the present disclosure is limited only by the appended claims.

Claims

1. A charge-discharge control switch, characterized by comprising: a driving circuit and a switching unit;

the volume of the switch unit is smaller than that of the relay, and the weight of the switch unit is smaller than that of the relay;

the switch unit comprises a charging switch group and a discharging switch group which are connected with each other; the charging switch group comprises at least one charging switch; the discharge switch group comprises at least one discharge switch;

2. The charge-discharge control switch of claim 1, wherein the charge switch and the discharge switch are MOS transistors of the same type; the charging switch is one; the discharge switch is one;

3. The charge-discharge control switch of claim 2, wherein the charge switch and the discharge switch are both NMOS transistors;

4. The charge-discharge control switch of claim 2, wherein the charge switch and the discharge switch are PMOS transistors;

5. The charge-discharge control switch according to claim 2, wherein the drive circuit includes: the charging output circuit is connected with the charging output circuit;

6. The charge-discharge control switch according to claim 5, wherein if the charge-discharge control signal is high-efficiency charge or high-efficiency discharge, the control unit is further configured to control the charge output circuit and the discharge output circuit to output voltages simultaneously;

7. A charge/discharge control device, comprising: a micro control unit, a sampling unit, a preset power supply and the charge-discharge control switch according to any one of claims 1 to 6;

8. A battery pack, comprising: a battery module and the charge-discharge control device according to claim 7;

9. An aircraft, comprising: a power plant and a battery pack as claimed in claim 8;

the battery pack is used for providing energy for the power equipment.