CN220984605U

CN220984605U - Battery pack, battery module, propulsion system and mobile device

Info

Publication number: CN220984605U
Application number: CN202322625491.6U
Authority: CN
Inventors: 张宇; 陶师正; 万小康
Original assignee: Guangdong ePropulsion Technology Co Ltd
Current assignee: Guangdong ePropulsion Technology Co Ltd
Priority date: 2023-09-26
Filing date: 2023-09-26
Publication date: 2024-05-17
Anticipated expiration: 2033-09-26

Abstract

The embodiment of the application provides a battery pack, a battery module, a propulsion system and movable equipment. The battery pack includes: the battery management system comprises a first input end, a second input end and an output end; the first input end and the second input end are connected with one end of a first switch unit, the other end of the first switch unit is connected with the battery core, and the output end is used for being connected with the first input end of the next battery pack connected with the battery pack; the first input end of the battery pack is used for transmitting a power supply signal when the first switch unit is closed so as to enable the battery management system to be powered on; the second input terminal is used for transmitting a control signal when the first switch unit is closed by receiving a closing operation of a user, so that the battery management system sets the local machine as a host machine. The application can accurately distinguish the host computer from the slave computer by whether the user executes the closing operation on the first switch unit in the battery pack, thereby improving the accuracy of determining the host computer and the slave computer.

Description

Battery pack, battery module, propulsion system and mobile device

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack, a battery module, a propulsion system and movable equipment.

Background

In recent years, various devices (e.g., electric vehicles, electric ships, etc.) have been increasingly in demand for batteries. In the device, multiple battery packs may be used to provide power. The device is generally only provided with an interface for receiving power supply signals and communication signals of one battery pack, and in the case of multiple battery packs, a need exists for distinguishing between a master and a slave of the multiple battery packs. A master-slave differentiation strategy for a plurality of battery packs is lacking in the related art.

Disclosure of Invention

In a first aspect, an embodiment of the present application provides a battery pack, which is applied to a battery module including a plurality of battery packs connected in sequence; the battery pack includes: the battery management system comprises a first input end, a second input end and an output end; the first input end and the second input end are connected with one end of the first switch unit, the other end of the first switch unit is connected with the battery cell, and the output end is used for being connected with the first input end of the next battery pack connected with the battery pack; the first input end of the battery pack is used for transmitting a power supply signal when the first switch unit is closed so as to enable the battery management system to be powered on; the second input terminal is used for transmitting a control signal when the first switch unit is closed by receiving a closing operation of a user, so that the battery management system sets the local machine as a host.

In a second aspect, an embodiment of the present application provides a battery module, where the battery module includes a plurality of battery packs according to any of the embodiments of the present application.

In a third aspect, embodiments of the present application provide a water propulsion system, the water propulsion system comprising: a water area propeller; the battery module is connected with the water area propeller.

In a fourth aspect, embodiments of the present application provide a water area mobile device, the water area mobile device comprising: a movable body; and a water propulsion system as in any one of the embodiments of the present application, the water propulsion system being coupled to the movable body.

According to the application, the plurality of battery packs are sequentially connected, the first input end and the second input end of the battery management system in each battery pack are connected with the battery core through the first switch unit, and after a user performs closing operation on the first switch unit in a certain battery pack, the first input end of the battery management system in the battery pack can transmit a power supply signal, so that the battery management system is electrified; and, the second input terminal of the battery management system in the battery pack can transmit the control signal, so that the battery management system sets the local machine as the host machine. Therefore, when a plurality of battery packs are connected in sequence, whether the second input end of each battery pack acquires the control signal can be used as a basis for distinguishing the master machine from the slave machines, the battery management system with the second input end acquiring the control signal is the master machine, and the battery management system without the second input end acquiring the control signal is the slave machine, so that the master machine and the slave machine can be distinguished accurately, and the accuracy for determining the master machine and the slave machine is improved.

Drawings

Fig. 1 is a schematic view of a battery module according to an embodiment of the present application.

Fig. 2 is a schematic view of a battery pack according to an embodiment of the present application.

Fig. 3 is a schematic view of a battery pack including a switching element and a double pole switch according to an embodiment of the present application.

Fig. 4 is a schematic view of a battery pack including a voltage converting unit according to an embodiment of the present application.

Fig. 5 is a schematic view of a battery pack including a second switching unit according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a battery pack including an external signal input terminal according to an embodiment of the present application.

Fig. 7 is a circuit schematic of a battery pack according to an embodiment of the present application.

Fig. 8 is a schematic view of a battery pack connected to a secondary battery according to an embodiment of the present application.

Fig. 9 is a schematic view of a battery pack connected to a charging device according to an embodiment of the present application.

Fig. 10 is a schematic view of a propulsion system according to an embodiment of the application.

Fig. 11 is a schematic diagram of a removable device according to an embodiment of the present application.

Fig. 12 is a schematic diagram showing a connection manner of a plurality of battery management systems according to an embodiment of the present application.

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 do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the application. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "in response to a determination" depending on the context.

In the device, a plurality of battery packs 101 are often used for parallel power supply, and the parallel battery packs 101 can improve the upper limit of power supply current and prolong the service time. In some application scenarios, the device is generally only equipped with an interface that receives a power supply signal and a communication signal of one battery, so in the case of using a plurality of battery packs 101 to supply power, a master-slave machine needs to be provided for the battery management system 1013 in each battery pack 101. The master machine may be used to control the local machine and each slave machine, and the slave machine may control the battery pack 101 where the local machine is located. Such management includes, but is not limited to, power control, charge control, fault monitoring, fault reporting, temperature monitoring, and/or communication and data management, among others.

In the related art, the host computer and the slave computer are often distinguished by the differences in the aspects of wiring mode, appearance, software and hardware configuration and the like, and the accuracy of the mode for distinguishing the host computer from the slave computer is not high. In some cases, the software and hardware configuration, appearance and wiring modes of the master and the slave may be the same, which further increases the difficulty of distinguishing the master and the slave.

Based on this, the present application provides a battery pack 101, a battery module 100, a propulsion system 11 and a mobile device 10, wherein a first switch unit 1012 is added between a battery core 1011 of the battery pack 101 and a battery management system 1013, the first switch unit 1012 is connected with a first input terminal In1 and a second input terminal In2 of the battery management system 1013 at the same time, and after the first switch unit 1012 is closed, the battery core 1011 can supply power to the battery management system 1013 through the first input terminal In1, so that the battery management system 1013 is electrically operated; and, when the first switching unit 1012 is closed by a user operation, a control signal may be transmitted to the battery management system 1013 through the second input terminal In2, so that the battery management system 1013 sets the home as a host. In this way, when the plurality of battery packs 101 are connected in sequence, whether the second input terminal of each battery pack acquires the control signal can be used as a basis for distinguishing the master machine from the slave machine, the battery management system of which the second input terminal acquires the control signal is the master machine, and the battery management system of which the second input terminal does not acquire the control signal is the slave machine. Therefore, the host computer and the slave computer can be accurately identified, and the accuracy of distinguishing the host computer from the slave computer is improved.

Specific implementations of the application are illustrated below.

Referring to fig. 1 to 7, the present application provides a battery pack 101 applied to a battery module 100 including a plurality of battery packs 101 connected in sequence; the battery pack 101 includes:

A Battery cell 1011, a Battery management system 1013 (Battery MANAGEMENT SYSTEM, BMS) and a first switch unit 1012, wherein the Battery management system 1013 includes a first input terminal In1, a second input terminal In2 and an output terminal Out;

The first input end In1 and the second input end In2 are connected with one end of the first switch unit 1012, the other end of the first switch unit 1012 is connected with the electric core 1011, and the output end Out is used for being connected with the first input end In1 of the next battery pack 101 connected with the battery pack 101;

A first input terminal In1 of the battery pack 101 is used for transmitting a power supply signal when the first switching unit 1012 is closed, so that the battery management system 1013 is powered;

the second input terminal In2 is used for transmitting a control signal when the first switch unit 1012 is closed by receiving a closing operation of a user, so that the battery management system 1013 sets the local as a host.

Each of the battery packs 101 in the battery module 100 of the present application may be used alone or together with at least one other battery pack 101. The following mainly exemplifies an embodiment in which a plurality of battery packs 101 are used together. In this case, N (N is a positive integer greater than 1) sequentially connected battery packs 101 may be included in the battery module 100. Each battery pack 101 may be the same configuration of battery packs 101, and in particular, may have the same software configuration, the same hardware configuration, the same appearance, and/or the same wiring pattern. Thus, when the user connects the plurality of battery packs 101, the user does not need to distinguish between the master and slave, and the user's convenience of operation is improved. The battery pack 101 in the above-described embodiment may be any one of the battery packs 101 in the battery module 100.

The cell 1011 is capable of storing and releasing electrical energy. The battery core 1011 can supply power to the power consumption components in the battery pack 101, wherein the power consumption components comprise a battery management system 1013, and can also comprise components such as an indicator lamp, a buzzer and the like. Wherein the indicator light may be used to indicate a state of the battery pack 101, such as an in-charge state, a charge completion state, a fault state, a low-charge state, etc. The buzzer may be used to output alarm information when the state of the battery pack 101 is abnormal.

The battery cell 1011 may be connected to the battery management system 1013 through a first switching unit 1012, wherein the first switching unit 1012 is capable of controlling opening and closing of a path between the battery cell 1011 and the battery management system 1013. When the first switching unit 1012 is turned off, the path between the battery cell 1011 and the battery management system 1013 is disconnected, and the battery cell 1011 stops supplying power to the battery management system 1013; when the first switching unit 1012 is closed, the path between the battery cell 1011 and the battery management system 1013 is conducted, and the battery cell 1011 supplies power to the battery management system 1013. The first switching unit 1012 may be closed in response to a closing operation by a user. For example, the first switch unit 1012 may include a physical button, a slider, a rotating component, or an interactive component such as a voice control component, and accordingly, the closing operation may be pressing the physical button, dragging the slider, rotating the rotating component, or emitting a voice signal.

The battery management system 1013 is configured to monitor, control, and protect the battery pack 101. The battery management system 1013 may include a first input terminal In1 and a second input terminal In2. When the first switch unit 1012 is closed, the battery cell 1011 can output a power supply signal to the first input terminal In1, and the first input terminal In1 transmits the power supply signal to the battery management system 1013 so that the battery management system 1013 can obtain power. When the first switching unit 1012 receives a closing operation of a user to be closed, the cell 1011 can output a control signal to the second input terminal In2, and the second input terminal In2 transmits the control signal to the battery management system 1013 so that the battery management system 1013 sets the local as a host. The power supply signal and the control signal may be voltage signals, and the voltage of the control signal may be the same as or different from the voltage of the power supply signal.

Referring to fig. 6, the battery management system 1013 may further include an output terminal Out for connecting to the first input terminal In1 of the next battery pack 101 connected to the battery pack 101 In which the battery management system 1013 is located. When the battery pack 101 in which the battery management system 1013 is located is the last battery pack 101 among the plurality of battery packs 101 connected in sequence, the output terminal Out of the battery management system 1013 of the last battery pack 101 may not need to be connected to another port. The battery pack 101 may output a power supply signal to the first input terminal In1 of the next battery pack 101 through the output terminal Out of the battery management system 1013 of the present battery pack 101 to power the battery management system 1013 of the next battery pack 101.

Or referring to fig. 3 and 5, the battery pack 101 further includes a second switching unit 1015 (i.e., a switching module in the foregoing embodiment). One end of the second switching unit 1015 is connected to one end of the first switching unit 1012 of the next battery pack 101, which is connected to the battery cell 1011, and the other end of the second switching unit 1015 is connected to the first input terminal In1 of the next battery pack 101, specifically, the second switching unit 1015 is connected to one end of the first switching unit 1012, which is connected to the first input terminal In1, so as to be connected to the first input terminal In1. The second switching unit 1015 may be a device having a switching function such as a relay. The second switch unit 1015 may further include an enable terminal, where the enable terminal of the second switch unit 1015 is connected to the output terminal Out of the battery management system 1013 of the battery pack 101 where the second switch unit 1015 is located, so that the second switch unit 1015 may be controlled to be opened or closed by the battery management system 1013. Specifically, the battery management system 1013 of the battery pack 101 in which the second switching unit 1015 is located may control the second switching unit 1015 to be closed after power is supplied. After the second switching unit 1015 is closed, the switching element 1012a of the next battery pack 101 is shorted, so that the battery cell 1011 of the next battery pack 101 can supply power to the battery management system 1013 of the next battery pack 101 to power the battery management system 1013 of the next battery pack 101.

If the second input terminal In2 of the battery management system 1013 In one battery pack 101 fails to acquire the control signal transmitted when the first switch unit 1012 of the present battery pack 101 is closed by receiving the closing operation of the user, the battery management system 1013 sets the present as the slave. For example, the battery management system 1013 may start timing when power is supplied, and if the second input terminal In2 of the battery management system 1013 fails to acquire the control signal when the timing time length reaches the preset time length threshold, the battery management system 1013 sets the local as the slave.

When the plurality of battery packs 101 are operated, the user can control the battery management system 1013 of the i-th battery pack 101 to be powered by the closing operation, and set the battery management system 1013 of the i-th battery pack 101 as the host. Then, the battery management system 1013 of the i+1th battery pack 101 is powered on through the output terminal Out of the battery management system 1013 of the i+1th battery pack 101, the battery management system 1013 of the i+2th battery pack 101 is powered on through the output terminal Out of the battery management system 1013 of the i+1th battery pack 101, and so on, so that the battery management systems 1013 of the i to nth battery packs 101 are powered on in sequence and start to operate. Since the battery management systems 1013 in the i+1th battery pack 101 to the battery management system 1013 in the N-th battery pack 101 fail to receive the control signal, the battery management systems 1013 in the i+1th battery pack 101 to the battery management system 1013 in the N-th battery pack 101 are all set as slaves. In this way, the user can implement one-key power-up of the plurality of battery packs 101 by operating the first switch unit 1012 in the battery pack 101 where the host computer is located, so that the power-up efficiency of the battery pack 101 is improved, and the power-up judgment time is shortened. Also, it is possible to accurately distinguish between the master and the slave according to whether the user operates the first switching unit 1012, reducing collision of the master and the slave.

In practical applications, the battery pack 101 where the host is located is the 1 st battery pack 101 among the plurality of battery packs 101, however, the present application is not limited thereto. In the case of a failure or the like of the 1 st battery pack 101, the user may operate the first switching unit 1012 in the other battery packs 101 according to actual needs, thereby setting the battery management system 1013 in the other battery packs 101 as the host.

In some embodiments, referring to fig. 2, 3, and 4, the first switching unit 1012 includes a double pole switch 1012b, and the double pole switch 1012b includes a first switching circuit and a second switching circuit. One end of the first switching circuit is connected to the first input terminal In1 of the battery management system 1013, and the other end of the first switching circuit is connected to the battery core 1011, and the first switching circuit is used for converting the electric energy output by the battery core 1011 into a power supply signal and transmitting the power supply signal to the first input terminal In1, so that the battery management system 1013 is powered. The first switching circuit may also be referred to as a supply circuit. One end of the second switching circuit is connected to the second input end In2 of the battery management system 1013, and the other end is connected to the first input end In1 of the battery management system 1013, specifically, connected to one end of the first switching circuit connected to the first input end In1, and then connected to the first input end In1. That is, the electric energy output by the cell 1011 is divided into two paths, one path is transmitted to the first input terminal In1 through the first switching circuit, and the other path is transmitted to the second input terminal In2 through the second switching circuit. The second switching circuit is configured to convert the electrical energy output by the battery cell 1011 into a control signal when the first switching unit 1012 is closed by receiving a closing operation of a user, and transmit the control signal to the second input terminal In2, so that the battery management system 1013 sets the host as the host. The second switching loop may also be referred to as a control loop. In this embodiment, the transmission of the power supply signal and the transmission of the control signal are implemented by a double-pole switch 1012b, so that the battery pack 101 has the advantages of simple structure and low cost.

With continued reference to fig. 2, 3, and 4, the battery pack 101 may further include a voltage conversion unit 1014, where the voltage conversion unit 1014 is connected between the battery management system 1013 and the double pole switch 1012b for converting the output voltage of the battery cell 1011. In the case where the battery pack 101 includes the voltage converting unit 1014, one end of the first switching circuit connected to the first input terminal In1 is connected to the first input terminal In1 via the voltage converting unit 1014, and one end of the second switching circuit connected to the first input terminal In1 is also connected to one end of the voltage converting unit 1014 connected to the first input terminal In 1.

In order to meet the power consumption requirement of the electric equipment, the voltage output by the battery 1011 is often larger, and the voltage output by the battery 1011 can be converted into the working voltage suitable for the battery management system 1013 by adding the voltage conversion unit 1014 to the battery pack 101, so as to prevent the battery management system 1013 from being damaged due to overlarge input voltage. In addition, when the output voltage of the battery cell 1011 changes, the voltage conversion unit 1014 can convert the output voltage of the battery cell 1011 into a fixed voltage, thereby ensuring the stability of the power supply signal and the control signal input to the battery management system 1013. Alternatively, the voltage converting unit 1014 may be a direct current-direct current (DC-DC) converter.

In some embodiments, the first switching unit 1012 is a self-recovering switch. After the first switching unit 1012 is closed in response to a closing operation by a user, the first switching unit 1012 can be automatically restored to an open state. In the case where the first switching unit 1012 is a self-recovery switch, the first switching unit 1012 may further include a switching element 1012a. One end of the switching element 1012a is connected to the battery cell 1011, and the other end is connected to the first input terminal In1. After the first switching unit 1012 receives a closing operation of a user to close, the battery management system 1013 is powered on, and thereafter, the battery management system 1013 may control the switching element 1012a to close, so that the battery cell 1011 may continue to output a power supply signal to the battery management system 1013 through the closed switching element 1012a to maintain the battery management system 1013 in an operating state. Alternatively, the switching element 1012a is a relay.

When power is not required to be supplied to the battery management system 1013, the switching element 1012a may be controlled to be turned off to disconnect the power supply circuit from the battery cell 1011 to the battery management system 1013, thereby reducing the power consumption of the battery management system 1013 to the battery cell 1011. Further, in the case where the battery pack 101 includes the voltage conversion unit 1014, one end of the switching element 1012a is connected to the cell 1011, and the other end is connected to the first input terminal In1 through the voltage conversion unit 1014. In this way, when the switching element 1012a is turned off, the cell 1011 can stop outputting electric power to the voltage conversion unit 1014 and the battery management system 1013, thereby simultaneously reducing the electric power consumption of the cell 1011 by the voltage conversion unit 1014 and the battery management system 1013.

With continued reference to fig. 3 and 5, in an embodiment in which the battery pack 101 includes the second switching unit 1015 and the first switching unit 1012 includes the switching element 1012a, after the battery management system 1013 of the next battery pack 101 is powered on, the battery management system 1013 in the battery pack 101 in which the second switching unit 1015 is located may control the second switching unit 1015 of the present battery pack 101 to be turned off. And, the battery management system 1013 of the next battery pack 101 may control the switching element 1012a of the next battery pack 101 to be closed. After the switching element 1012a of the next battery pack 101 is closed, a loop between the cell 1011 of the present battery pack 101 to the battery management system 1013 of the next battery pack 101 is conducted, so that the cell 1011 of the present battery pack 101 can supply power to the battery management system 1013 of the next battery pack 101. Therefore, by controlling the second switch unit 1015 to be turned off, the battery management system 1013 of the next battery pack 101 can be powered only by the battery core 1011 of the next battery pack 101, so that the situation that one battery pack 101 supplies power to the battery management system 1013 of the next battery pack 101 for a long time is avoided, and the balance between the electric quantities of the battery packs 101 is improved.

Referring to fig. 6, the battery management system 1013 further includes an external signal input terminal In3 connected to an external power source. The external signal input terminal In3 can be used for transmitting an electrical signal output by an external power source, so that the battery management system 1013 sets the host as a host. If the battery management system 1013 fails to acquire the electrical signal output from the external power supply through the external signal input terminal In3, the battery management system 1013 sets the local as the slave. The external signal input terminal In3 may include a third input terminal In31 for connecting with the external storage battery 200; and/or a fourth input terminal In32 for connection with the external charging device 300. By setting the external signal input end In3, besides the first switch unit 1012 is manually operated by a user, the master-slave machine can be set In a power supply mode of an external power supply, so that the setting mode of the master-slave machine is more flexible.

The general flow of the present application is described below with reference to specific circuit diagrams.

As shown In fig. 7, 8, 9 and 12, each battery pack 101 has 1 double-pole self-recovery switch (i.e. the first switch unit 1012), when the user presses the double-pole self-recovery switch, the self-locking relay (i.e. the switch unit 1012 a) is shorted, the first switch loop (shown by the short dashed line In fig. 10) is turned ON, the DC-DC converter obtains the battery power, and outputs a 12V or 24V power supply signal to the first input terminal In1 (shown by the ON-level port In fig. 10) of the battery management system 1013, so that the battery management system 1013 can obtain the electric work. The battery management system 1013 may also control the on-off relay (i.e., the second switching unit 1015) to be closed, so as to short the latching relay of the next battery pack 101, thereby conducting the first switching circuit of the next battery pack 101, and the battery management system 1013 of the next battery pack 101 is powered. As shown in fig. 12, the on-off relay of the battery pack where the control host of the host is located is closed, so that the ignition 1 and the ignition 2 below the host are turned on, and further, the ignition 1 and the ignition 2 above the slave 1 are turned on. After the ignition 1 and the ignition 2 above the slave 1 are turned on, the self-locking relay of the slave 1 is shorted, the first switching circuit of the slave 1 is turned on, and the battery management system 1013 of the slave 1 is powered. Similar to the operation of the master, after the battery management system 1013 of the slave 1 is powered on, the slave 1 controls the on-off relay of the battery pack 101 where the slave 1 is located to be closed, so that the self-locking relay of the battery pack where the slave 2 is located is shorted, the first switch loop of the slave 2 is turned on, and the battery management system 1013 of the slave 2 is powered on. Therefore, the user only needs to operate the host to enable the host to be electrified, and other slaves can be electrified under the control of the previous battery pack 101 connected with the host, so that the function of one-key electrification of a plurality of battery packs 101 is realized, and the operation of the user is greatly facilitated.

Whether the battery management system 1013 is used as a master machine or a slave machine, after the battery management system 1013 is powered on, a holding signal is output to the self-locking relay to enable the self-locking relay to be closed and kept in a closed state, so that when the double-blade self-recovery switch is opened, a loop where the self-locking relay is located is conducted, and the DC-DC converter can continuously obtain power supply of the battery cell 1011, so that the battery management system 1013 is continuously in a power-on state. When the user presses the double-pole self-recovery switch, the second switching circuit (shown by the long dashed line In fig. 10) is also turned on, the 12V or 24V control signal output by the DC-DC converter is given to the second input terminal In2 (i.e., PWM signal detection port) of the battery management system 1013, and the battery management system 1013 detects the 12V or 24V control signal within 3s of power-on, thereby setting itself as the host. While the PWM signal detection port of the battery management system 1013 in which the double-pole self-recovery switch is not pressed fails to detect the 12V or 24V control signal, the battery management system 1013 sets itself as a slave.

As shown In fig. 7, 8 and 10, each battery pack 101 also has an external 12V-C power supply 12V-C detection port (i.e., an external signal input terminal In 3). When the battery pack 101 is used for the propeller 500, such as an outboard motor, the outboard motor is equipped with a 12V battery 200, and the 12V battery 200 is mainly used for supplying power to electric equipment such as an ECU, a tilting motor, a steering motor, and the like of the outboard motor. When an outboard motor is connected to the battery pack 101 and the outboard motor is powered up, the outboard motor will output a 12V-C signal provided by the battery 200 to the battery management system 1013 of the battery pack 101 directly connected thereto, so that the battery management system 1013 is powered up. After the battery management system 1013 is powered on, it detects that a 12V signal is input at the 12V-C detection port in the figure, and sets itself as the host. While the 12V signal is not detected by the 12V-C detection port for the battery management system 1013 of the battery pack 101 that is not directly connected to the outboard motor, this part of the battery management system 1013 sets itself as a slave.

As shown in fig. 7 and 9, the battery pack 101 may be charged without operating the first switching unit 1012 at the time of charging. The charger (i.e., the charging device 300 in the foregoing embodiment) supplies and communicates only with the battery pack 101 directly connected thereto (simply referred to as the direct battery pack 101). The charger is plugged In, the charger outputs an auxiliary 12V power supply to power the direct-connected battery pack 101, the direct-connected battery pack 101 is electrified, a CHG_P+ detection port (namely an external signal input end In 3) of a battery management system 1013 of the direct-connected battery pack 101 detects the auxiliary 12V power supply for charging, and the direct-connected battery pack 101 is set as a host. In contrast, the chg_p+ detection port of the battery management system 1013 of the battery pack 101, which is not directly connected to the charger, does not detect a signal of 12V, and therefore, this part of the battery management system 1013 sets itself as a slave. Through setting up multiple master slave machine recognition mode, can be applicable to different application scenarios, improve the flexibility of scheme. For example, in the charging scenario, the master-slave machine may be determined by the input signal of the third input terminal In 31; during the power-up process of each battery management system 1013, the master-slave machine can be determined by the input signal of the second input terminal In 2.

Thereby realizing the power-on operation and master-slave setting process of the plurality of battery packs 101 connected in sequence. After setting up the host and the slave, the host may send a host message, and the slave may send a slave message. The number of hosts may be determined based on the number of battery management systems 1013 that send host messages. If the number of hosts is greater than 1 (e.g., the user presses the first switch unit 1012 in the plurality of battery packs 101), a failure notice may be output. In addition, the battery pack 101 may also output a high voltage signal to an external consumer (e.g., the propeller 500). If the high voltage power is not supplied when the fault prompt is output, the high voltage power is not supplied (namely, the battery pack 101 is forbidden to output a high voltage signal); if high voltage is applied at this time, the master issues a high voltage command to the slave and all slaves to cause all of the battery packs 101 to be high voltage (i.e., stop outputting high voltage signals).

In some embodiments, after the power-up of the battery management system 1013 in the host, if the power-down signal is detected, the line between the battery cell 1011 of the battery pack 101 where the host is located and the host may be disconnected, so that the host is powered down. Referring to fig. 2 to 6, the power-down signal may be generated by a user operating the first switching unit 1012 in the main unit, or generated after the charging is completed, or issued by the power consumer. Specifically, the battery management system 1013 in the host may open the switching element 1012a in the host, thereby disconnecting the line between the battery cell 1011 and the battery management system 1013 in the host.

For example, considering that the host performs a unified management function on each slave, after the host powers on, if a power-down signal is detected, the host may first send a power-down instruction to all the slaves, so that each slave cuts off a circuit between the cell 1011 of the battery pack 101 where the slave resides and the slave, and then cuts off a circuit between the cell 1011 of the battery pack 101 where the host resides and the host, thereby enabling a plurality of battery packs 101 to be powered down by one key, which is beneficial to improving power-down efficiency. Each slave can disconnect the switching element 1012a of the battery pack 101 where the slave is located, thereby disconnecting the line between the battery cell 1011 of the battery pack 101 where the slave is located and the slave.

For example, the user may cause the host to receive the power-down signal by operating the first switching unit 1012 of the battery pack 101 where the host is located. Because the first switch unit 1012 can not only power up the battery pack 101 but also power down the battery pack 101, in order to avoid that the user presses the first switch unit 1012 for a long time to cause the battery pack 101 to mistakenly consider the power up signal as the power down signal, after a first time from the power up, the host computer controls the host computer and all the slaves to power down if detecting the power down signal. The embodiment realizes that whether the power-down signal is detected or not is judged after the power-up is performed for a period of time, and the power-down accuracy is ensured. It can be appreciated that the first duration may be specifically set according to an actual application scenario, which is not limited in this embodiment. For example, the first duration may be 10s or 20s.

Illustratively, the down signal is an input signal received by the host from its second input terminal In 2. When the host is in an operating state, the user may operate the first switching unit 1012 to close the first switching unit 1012. When the host is In an operating state and the first switch unit 1012 is closed by receiving a closing operation of a user, the battery cell 1011 can output a control signal to the second input terminal In2, and the second input terminal In2 transmits the control signal to the battery management system 1013 so that the battery management system 1013 is powered down.

For example, in order to ensure that the slave can receive the shutdown instruction sent by the master, the master may send the shutdown instruction to all the slaves every second duration after detecting the power-down signal, and disconnect the line between the battery cell 1011 of the battery pack 101 where the slave is located and the slave after sending the shutdown instruction for a preset number of times. According to the embodiment, the power-off instruction is sent for a plurality of times, so that the slave can receive the power-off instruction, and power-off operation is executed according to the power-off instruction, and the power-off accuracy is guaranteed. It can be understood that the second duration and the preset number of times can be specifically set according to the actual application scenario, which is not limited in this embodiment. For example, the second duration may be 200ms or 250ms; the preset number of times may be 3 times or 5 times, etc.

Referring to fig. 1, the present application also provides a battery module 100 including a plurality of battery packs 101 according to any of the embodiments of the present application.

Referring to fig. 10, the present application also provides a propulsion system 11 comprising: a propeller 500; and the battery module 100 according to any one of the embodiments of the present application, the battery module 100 is connected with the propeller 500. The battery module 100 may supply power to the propeller 500 to cause the propeller 500 to output power. The number of the impellers 500 may be 1 or more, and the number of the battery modules 100 may be 1 or more. In some examples, the battery modules 100 may be in a one-to-one correspondence with the thrusters 500, each thruster 500 being powered by its corresponding battery module 100. In other examples, one propeller 500 may be powered by a plurality of battery modules 100. In still other examples, one battery module 100 may also power multiple propellers 500.

As shown in fig. 11, an embodiment of the present application further provides a mobile device 10, where the mobile device 10 includes a mobile body 12 and a propulsion system 11 according to any embodiment of the present application, and the propulsion system 11 is mounted on the mobile body 12.

The mobile device 10 includes devices capable of operating or moving in land, water, air, etc. As one example, the mobile device 10 may be a land mobile device, such as an automobile, truck, or the like. As another example, the mobile device 10 may be an aircraft, e.g., an unmanned plane, an airship, or the like. As yet another example, the mobile device 10 refers to a mobile device capable of running or activity on water, and may be used for sailing, diving, recreation, or other water activities. For example, the movable equipment in the water area can be various water area vehicles such as commercial ships, passenger ships, yachts, fishing ships, sailing ships, civil ships, etc., equipment capable of moving in the water area such as water area inspection equipment, water area management equipment, water area environment monitoring equipment, etc., equipment capable of operating under water such as underwater exploration ships, etc., and the application is not limited in this regard.

Taking the mobile device 10 as a water mobile device as an example, the mobile body 12 is a water mobile body, and the propulsion system 11 is a water propulsion system. The water propulsion system is used as power supply equipment of movable water equipment, and can change the posture of the movable water body so as to be placed below the water surface when the water propulsion system is needed to be used, thereby providing driving force for the movement of the movable water body. When the water propulsion system is not needed, the water propulsion system is placed above the water surface, so that the resistance of water flow when the movable body of the water area moves is reduced. The water propulsion system may be mounted in the head, tail, or side, and may be used as a side thruster when mounted in the side to assist in steering of the water mobile equipment, etc. The water propeller may be an outboard motor, an inboard motor, a pod propeller, etc., and the application is not limited in this regard.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the application.

Claims

1. A battery pack, characterized by being applied to a battery module including a plurality of the battery packs connected in sequence; the battery pack includes:

The battery management system comprises a first input end, a second input end and an output end;

The first input end and the second input end are connected with one end of the first switch unit, the other end of the first switch unit is connected with the battery cell, and the output end is used for being connected with the first input end of the next battery pack connected with the battery pack;

The first input end of the battery pack is used for transmitting a power supply signal when the first switch unit is closed so as to enable the battery management system to be powered on;

The second input terminal is used for transmitting a control signal when the first switch unit is closed by receiving a closing operation of a user, so that the battery management system sets the local machine as a host.

2. The battery pack according to claim 1, wherein the first switching unit of the battery pack comprises a double-pole switch including a first switching circuit and a second switching circuit;

One end of the first switch loop is connected with the first input end, and the other end of the first switch loop is connected with the battery cell;

One end of the second switch loop is connected with the second input end, and the other end of the second switch loop is connected with the first input end of the battery pack.

3. The battery pack according to claim 2, wherein the double-pole switch is a double-pole self-recovery switch, and the first switching unit further includes a switching element;

One end of the switching element is connected with the battery cell, and the other end of the switching element is connected with the first input end.

4. The battery pack according to claim 2 or 3, further comprising:

And the voltage conversion unit is connected between the battery management system and the double-pole switch and used for converting the output voltage of the battery cell.

5. The battery pack according to claim 4, wherein one end of the first switching circuit connected to the first input terminal is connected to the first input terminal via the voltage conversion unit.

6. The battery pack of claim 1, wherein the battery pack further comprises:

And one end of the second switch unit is connected with the output end, and the other end of the second switch unit is connected with the first input end of the next battery pack.

7. The battery pack according to claim 6, wherein one end of the second switching unit is connected to one end of the first switching unit of the next battery pack connected to the battery cell, and the other end of the second switching unit is connected to the first input end of the next battery pack.

8. The battery pack of claim 1, wherein the battery management system further comprises:

The external signal input end is used for being connected with an external power supply.

9. The battery pack of claim 8, wherein the external signal input terminal comprises:

the third input end is used for being connected with an external storage battery; and/or

And the fourth input end is used for being connected with external charging equipment.

10. A battery module comprising a plurality of battery packs according to any one of claims 1 to 9.

11. A propulsion system, the propulsion system comprising:

A propeller; and

The battery module of claim 9, the battery module being coupled to the propeller.

12. A removable device, the removable device comprising:

A movable body; and

The propulsion system of claim 11, in combination with the movable body.