Battery management method and battery management device

Abstract

A battery management method, a battery management device, and a battery system. The battery management method is applied to a battery management device (20) to manage the battery device (20), the battery management device (20) includes a connection state conversion device (200), the contact of the connection state conversion device (200) is connected with two battery groups of the battery device (10), and the method comprises: acquiring an operating environment voltage of the battery device (10); and controlling the connection state conversion device (200) to convert from a first connection state to a second connection state according to the operating environment voltage. It is expected to solve the technical problem that the battery device (10) cannot be compatible with different voltage platforms.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and more specifically, to a battery management method and a battery management device. Background Technology

[0002] With the increasing prevalence of energy shortages and environmental pollution in modern society, electric vehicles, as a new energy vehicle, have gained widespread recognition since their introduction. Conventional household electric vehicles are designed and developed based on a 400-volt voltage platform and have rapidly captured the market. The batteries, motors, and related system components of electric vehicles are all compatible with the 400-volt voltage platform, therefore the market provides charging equipment that is compatible with the 400-volt voltage platform for charging electric vehicles.

[0003] With the increasing demands for driving range in electric vehicles and the growing demand for freight and passenger transport based on electric vehicles, electric vehicle battery capacities are becoming larger and charging times are becoming longer. This has led to the development of electric vehicles and charging equipment based on an 800-volt voltage platform, significantly reducing charging time. However, charging equipment based on a 400-volt voltage platform cannot charge electric vehicles based on an 800-volt voltage platform, and electric vehicles based on a 400-volt voltage platform cannot use charging equipment based on an 800-volt voltage platform. Furthermore, 400-volt battery packs cannot power motors and other system components on an 800-volt voltage platform, and motors and other system components on a 400-volt voltage platform are incompatible with 800-volt battery packs. Summary of the Invention

[0004] In a first aspect, embodiments of this disclosure provide a battery management device for managing a battery device. The battery management device includes a control device and a connection state transition device. The connection state transition device includes a first pair of contacts, a second pair of contacts, and a third pair of contacts. One contact in the first pair of contacts is used to connect to the positive terminal of a first battery pack of the battery device, and the other contact in the first pair of contacts is used to connect to the negative terminal of a second battery pack of the battery device. One contact in the second pair of contacts is used to connect to the positive terminal of the first battery pack, and the other contact in the second pair of contacts is used to connect to the positive terminal of the second battery pack. One contact in the third pair of contacts is used to connect to the first battery pack. The negative terminal is connected, and another contact in the third pair of contacts is used to connect to the negative terminal of the second battery pack; the control device is used to control the connection state switching device to switch from a first connection state to a second connection state; the first connection state includes: the first pair of contacts are on, the second pair of contacts are off, and the third pair of contacts are off; the second connection state includes: the first pair of contacts are off, the second pair of contacts are on, and the third pair of contacts are on; or, the first connection state includes: the first pair of contacts are off, the second pair of contacts are on, and the third pair of contacts are on; the second connection state includes: the first pair of contacts are on, the second pair of contacts are off, and the third pair of contacts are off.

[0005] In some possible embodiments, the control device is further configured to acquire the operating environment information of the battery device; the control device controls the connection state transition device to transition from the first connection state to the second connection state based on the operating environment information.

[0006] In some possible embodiments, the operating environment information includes an operating environment voltage, wherein the nominal voltage of the first battery pack is the same as the nominal voltage of the second battery pack; the control device is further configured to control the connection state switching device to switch from the first connection state to the second connection state when it is determined that the operating environment voltage matches the nominal voltage.

[0007] In some possible embodiments, the operating environment information includes an operating environment voltage, wherein the nominal voltage of the first battery pack is the same as the nominal voltage of the second battery pack; the control device is further configured to control the connection state switching device to switch from the first connection state to the second connection state when it is determined that the operating environment voltage matches twice the nominal voltage.

[0008] In some possible embodiments, the operating environment voltage includes the operating voltage of the charging device, and the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the charging device; the control device is also used to control the charging device to charge the battery pack.

[0009] In some possible embodiments, the operating environment voltage includes the operating voltage of the power device, and the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the power device; the control device is also used to control the battery device to supply power to the power device.

[0010] In some possible embodiments, the connection state transition device includes a detection unit and a conduction unit; the control device is further configured to send a control signal to the connection state transition device; the detection unit, in response to detecting the control signal, drives the conduction unit to move from a first position to a second position; when the conduction unit is in the first position, the connection state transition device is in the first connection state; when the conduction unit is in the second position, the connection state transition device is in the second connection state.

[0011] In a second aspect, a battery system is provided, the battery system including the battery management device provided in the first aspect and various possible embodiments thereof.

[0012] Thirdly, a battery management method is provided, applied to a battery management device to manage the battery device. The battery management device includes a connection state transition device; the connection state transition device includes a first pair of contacts, a second pair of contacts, and a third pair of contacts; one contact in the first pair of contacts is used to connect to the positive terminal of a first battery pack of the battery device, and the other contact in the first pair of contacts is used to connect to the negative terminal of a second battery pack of the battery device; one contact in the second pair of contacts is used to connect to the positive terminal of the first battery pack, and the other contact in the second pair of contacts is used to connect to the positive terminal of the second battery pack; one contact in the third pair of contacts is used to connect to the negative terminal of the first battery pack, and the other contact in the third pair of contacts is used to connect to the negative terminal of the second battery pack. The negative terminal of the second battery pack is connected; the first connection state of the connection state switching device includes: the first pair of contacts are on, the second pair of contacts are off, and the third pair of contacts are off; the second connection state of the connection state switching device includes: the first pair of contacts are off, the second pair of contacts are on, and the third pair of contacts are on; or, the first connection state includes: the first pair of contacts are off, the second pair of contacts are on, and the third pair of contacts are on; the second connection state includes: the first pair of contacts are on, the second pair of contacts are off, and the third pair of contacts are off; the method includes: acquiring the operating environment information of the battery device; and controlling the connection state switching device to switch from the first connection state to the second connection state according to the operating environment information.

[0013] In some possible embodiments, the operating environment information includes the operating environment voltage, wherein the nominal voltage of the first battery pack is the same as the nominal voltage of the second battery pack; the step of controlling the connection state transition device to switch from the first connection state to the second connection state based on the operating environment information includes: controlling the connection state transition device to switch from the first connection state to the second connection state when it is determined that the operating environment voltage matches the nominal voltage.

[0014] In some possible embodiments, the operating environment information includes an operating environment voltage, wherein the nominal voltage of the first battery pack is the same as the nominal voltage of the second battery pack; the step of controlling the connection state transition device to switch from the first connection state to the second connection state based on the operating environment information includes: controlling the connection state transition device to switch from the first connection state to the second connection state when it is determined that the operating environment voltage matches twice the nominal voltage.

[0015] In some possible embodiments, the operating environment voltage includes the operating voltage of the charging device, and the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the charging device; after controlling the connection state switching device to switch from the first connection state to the second connection state, the method further includes: controlling the charging device to charge the battery device.

[0016] In some possible embodiments, the operating environment voltage includes the operating voltage of the power device, and the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the power device; after controlling the connection state switching device to switch from the first connection state to the second connection state, the method further includes: controlling the battery device to supply power to the power device.

[0017] In some possible embodiments, the connection state transition device includes a detection unit and a conduction unit; controlling the connection state transition device to transition from the first connection state to the second connection state according to the working environment information includes: sending a control signal to the connection state transition device according to the working environment information, so that the detection unit, in response to detecting the control signal, drives the conduction unit to move from a first position to a second position; when the conduction unit is in the first position, the connection state transition device is in the first connection state; when the conduction unit is in the second position, the connection state transition device is in the second connection state.

[0018] Fourthly, a computing device is provided, including a processor and a memory, the memory storing computer instructions, the processor being configured to execute the computer instructions such that the computing device implements the battery management method provided in the third aspect and its various possible embodiments.

[0019] Fifthly, a computer storage medium is provided for storing computer instructions that, when executed by a computing device, cause the computing device to implement the battery management method provided in the third aspect and its various possible embodiments.

[0020] In a sixth aspect, a connection state switching device is provided, the connection state switching device comprising: a first pair of contacts, a second pair of contacts, a third pair of contacts, and a connection control device; one contact of the first pair of contacts is used to connect to the positive terminal of a first battery pack, and the other contact of the first pair of contacts is used to connect to the negative terminal of a second battery pack; one contact of the second pair of contacts is used to connect to the positive terminal of the first battery pack, and the other contact of the second pair of contacts is used to connect to the positive terminal of the second battery pack; one contact of the third pair of contacts is used to connect to the negative terminal of the first battery pack, and the other contact of the third pair of contacts is used to connect to the negative terminal of the second battery pack. The negative terminal of the pool group is connected; the connection control device responds to the detection of a control signal, causing the connection state switching device to switch from a first connection state to a second connection state; the first connection state includes: the first pair of contacts are on, the second pair of contacts are off, and the third pair of contacts are off; the second connection state includes: the first pair of contacts are off, the second pair of contacts are on, and the third pair of contacts are on; or the first connection state includes: the first pair of contacts are off, the second pair of contacts are on, and the third pair of contacts are on; the second connection state includes: the first pair of contacts are on, the second pair of contacts are off, and the third pair of contacts are off.

[0021] In a seventh aspect, a battery device is provided, the battery device including the connection state switching device provided in the sixth aspect and various possible embodiments thereof, and further including the first battery pack and the second battery pack mentioned in the sixth aspect. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0023] Figure 1 A schematic diagram illustrating an application scenario of the battery management device provided in one or more embodiments of this disclosure;

[0024] Figure 2 This includes a schematic diagram of the working state of a battery management device provided in one or more embodiments of this disclosure;

[0025] Figure 3 This includes a schematic diagram of the working state of another battery management device provided in one or more embodiments of the present disclosure;

[0026] Figure 4 This includes a schematic diagram of the working state of a connection state transition device provided in one or more embodiments of this disclosure;

[0027] Figure 5 This includes a schematic diagram of the working state of another connection state transition device provided in one or more embodiments of the present disclosure;

[0028] Figure 6 This includes schematic flowcharts of battery management methods provided in one or more embodiments of this disclosure;

[0029] Figure 7 A schematic block diagram of a computing device provided in one or more embodiments of this disclosure. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0031] Unless otherwise defined, all technical and scientific terms used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used in the specification of this disclosure and the application is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this disclosure are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this disclosure are used to distinguish different objects, and not to describe a particular order or hierarchy.

[0032] In this disclosure, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this disclosure can be combined with other embodiments.

[0033] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0034] In this disclosure, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this disclosure, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0035] In this disclosure, "multiple" refers to two or more (including two), and similarly, "multiple sets" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0036] A battery device includes a battery that provides electrical energy to an electrical device or load device. A battery device may include a rechargeable battery or a secondary battery. In terms of battery type, a battery device may be a lithium-ion battery, a lithium metal battery, a lead-acid battery, a nickel-cadmium battery, a nickel-metal hydride battery, a lithium-sulfur battery, a lithium-air battery, or a sodium-ion battery, etc., and no specific limitation is made in this disclosure. In terms of battery scale, a battery device may include battery cells / individual cells, battery packs, and / or battery stacks. A battery device may include a battery management device, such as a battery management system (BMS), which can be used for safety monitoring, parameter collection and configuration, and control of charging and discharging, etc., of the battery device. The function of the battery management device is not specifically limited in this disclosure.

[0037] Charging devices, such as charging piles or chargers, are used to charge battery devices. The charging device can output charging power according to the charging requirements of the BMS to charge the battery device. For example, the charging device can output voltage and current according to the required voltage and current sent by the BMS, and charge the battery device with the participation of the BMS.

[0038] Electrical devices include various electrical equipment that obtains electrical energy from battery devices, including but not limited to motors, vehicles, ships, and spacecraft. As an example, the motor of a hybrid vehicle is connected to the battery device and obtains electrical energy from the battery device to achieve driving function. The embodiments of this disclosure do not specifically limit the electrical devices.

[0039] In a common scenario, charging devices charge battery devices, which in turn provide power to electrical devices. However, in some special situations, the charging input of the charging device may not be compatible with the battery device, and the power output of the battery device may not be compatible with the electrical device. For example, a charging station with a 400-volt voltage platform cannot charge an electric vehicle with an 800-volt voltage platform, and an electric vehicle with a 400-volt voltage platform cannot be charged using a charging station with an 800-volt voltage platform. Furthermore, a battery device with a 400-volt voltage platform cannot power system components such as motors on an 800-volt voltage platform, and system components such as motors on a 400-volt voltage platform are also incompatible with battery devices on an 800-volt voltage platform.

[0040] In view of the above situation, the present disclosure provides a battery management device, which aims to improve the compatibility of the battery device in terms of charging input and / or power output, so as to solve the technical problem of incompatibility between the battery device and different voltage platforms.

[0041] Figure 1 The diagram illustrates an application scenario of the battery management device provided in one or more embodiments of this disclosure. Figure 1 The system includes a battery device 10, a battery management device 20, and a charging / power-consuming device 30. The battery device 10 includes a first battery pack 101 and a second battery pack 102, which can be connected in series or in parallel and connected to the charging / power-consuming device 30 (in this embodiment, device 30 can be either a charging device or a power-consuming device), thereby providing power to the power-consuming device or charging it via the charging device. In this embodiment, the battery pack is, for example, composed of multiple cells connected in series and / or in parallel and includes a positive and a negative electrode; the charging device is, for example, a charging pile or a charging gun; and the power-consuming device is, for example, a motor, a vehicle, a ship, or an aircraft. Those skilled in the art will understand that… Figure 1 The diagram shown is a schematic representation of an application scenario of the battery management device provided in this embodiment of the present disclosure. Figure 1 Other electrical components can also be connected in the application scenarios shown. For example, as needed, a main positive and main negative switch or relay can be connected to the positive and negative terminals of the battery device, respectively. This disclosure does not limit this.

[0042] Battery management device 20 includes control device 210 ( Figure 1 (not shown) and connection state switching device 200 ( Figure 1(Not shown), the connection state switching device 200 includes a first pair of contacts 201, a second pair of contacts 202, and a third pair of contacts 203. One contact in the first pair of contacts 201 is connected to the positive terminal of the first battery pack 101 of the battery device 10, and the other contact in the first pair of contacts 201 is connected to the negative terminal of the second battery pack 102 of the battery device 10. Similarly, one contact in the second pair of contacts 202 is connected to the positive terminal of the first battery pack 101, and the other contact in the second pair of contacts 202 is connected to the positive terminal of the second battery pack 102. Likewise, one contact in the third pair of contacts 203 is connected to the negative terminal of the first battery pack 101, and the other contact in the third pair of contacts 203 is connected to the negative terminal of the second battery pack 102. For example, a contact can be connected to either the positive or negative terminal of the battery pack via a wire, thus establishing an electrical connection from the positive or negative terminal of the battery pack to that contact.

[0043] The connection state transition device 200 of the battery management device 20 includes a first connection state and a second connection state. In one optional embodiment, the first connection state includes: a first pair of contacts 201 being on, a second pair of contacts 202 being off, and a third pair of contacts 203 being off; the second connection state includes: the first pair of contacts 201 being off, the second pair of contacts 202 being on, and the third pair of contacts 203 being on. In another optional embodiment, the first connection state includes: the first pair of contacts 201 being off, the second pair of contacts 202 being on, and the third pair of contacts 203 being on; the second connection state includes: the first pair of contacts 201 being on, the second pair of contacts 202 being off, and the third pair of contacts 203 being off. Those skilled in the art will understand that a pair of on contacts means that there is an electrical connection between the pair of contacts, for example, current can flow from one contact in the pair to the other contact in the pair; a pair of off contacts means that there is no electrical connection between the pair of contacts, for example, current cannot flow from one contact in the pair to the other contact in the pair.

[0044] The control device 210 of the battery management device 20 controls the connection state transition device 200 to transition from a first connection state to a second connection state. As an example, the control device 210 can be a functional unit implemented in software and / or hardware. For instance, the control device 210 includes a processor or processing unit that can be coupled to a memory and execute instructions stored in the memory to perform functions such as managing and / or controlling the battery device. Alternatively, the control device 210 may include control circuitry to perform these functions. The control device 210 can be part of the BMS or the BMS itself, and perform the aforementioned management and / or control functions. In one or more embodiments of this disclosure, the control device 210 controls the connection state transition device 200 to transition from the first connection state to the second connection state. For example, the control device 210 can send a control signal to the connection state transition device 200, causing the connection state transition device 200 to transition from the first connection state to the second connection state in response to detecting the control signal. It is worth noting that the embodiments disclosed herein do not limit the type and implementation form of the control signal. For example, sending a control signal can be achieved by sending a control command, a high level, a low level, power on, power off, etc.

[0045] Figure 2 The diagram shown is a schematic representation of the working state of a battery management device provided in one or more embodiments of this disclosure, wherein... Figure 2 (a) shows one connection state of the connection state switching device 200 of the battery management device 20. Figure 2 (b) illustrates that when the battery management device 20 is in this connected state, the battery management device 20 performs... Figure 1 The diagram shows the working status of the application scenario. Figure 2 In the connection state switching device 200, the connection state includes: the first pair of contacts 201 is on, the second pair of contacts 202 is off, and the third pair of contacts 203 is off. Since the second pair of contacts 202 is off and the third pair of contacts 203 is off, for ease of understanding of this embodiment, in... Figure 2 (b) does not show the wiring connected to the second pair of contacts 202 and the third pair of contacts 203.

[0046] See Figure 2 (a) The battery management device 20 includes a connection state transition device 200 and a control device 210. The connection state transition device 200 includes a first pair of contacts 201, a second pair of contacts 202, and a third pair of contacts 203. Figure 2In (a), the connection states of the connection state switching device 200 include: the first pair of contacts 201 are on, the second pair of contacts 202 are off, and the third pair of contacts 203 are off. Thus, there is an electrical connection or a path between the two contacts of the first pair of contacts 201; for example, current can flow from one contact of the first pair of contacts 201 to the other. The second pair of contacts 202 are off; there is no path between the two contacts of the second pair of contacts 202, and current cannot flow from one contact of the second pair of contacts 202 to the other. Similarly, the third pair of contacts 203 are also off; there is no path between the two contacts of the third pair of contacts 203, and current cannot flow from one contact of the third pair of contacts 203 to the other. See also... Figure 2 (b) Since one contact of the first pair of contacts 201 is connected to the negative terminal of the first battery pack 101 of the battery device 10, and the other contact of the first pair of contacts 201 is connected to the positive terminal of the second battery pack 102 of the battery device 10, when the first pair of contacts 201 of the connection state switching device 200 is turned on and the second pair of contacts 202 and the third pair of contacts 203 are turned off, the negative terminal of the first battery pack 101 and the positive terminal of the second battery pack 102 of the battery device 10 are connected together through the first pair of contacts 201, and the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected in series. Figure 2 As shown in (b), the positive terminal of the first battery pack 101 and the negative terminal of the second battery pack 102 are respectively connected to the charging device / electrical device 30. Therefore, when the connection state switching device 200 is in a state of... Figure 2 In the connection state shown (i.e., the first pair of contacts 201 is on, the second pair of contacts 202 is off, and the third pair of contacts 203 is off), the first battery pack 101 and the second battery pack 102 supply power to the electrical device 30 in series, or the first battery pack 101 and the second battery pack 102 obtain electrical energy from the charging device 30 in series.

[0047] Figure 3 The diagram shown is a schematic representation of the working state of another battery management device provided in one or more embodiments of this disclosure, wherein... Figure 3 (a) shows another connection state of the connection state switching device 200 of the battery management device 20. Figure 3 (b) illustrates that when the battery management device 20 is in this additional connection state, the battery management device 20... Figure 1 The diagram shows the working status of the application scenario. Figure 3 In this context, the connection states of the connection state switching device 200 include: the first pair of contacts 201 are open, the second pair of contacts 202 are closed, and the third pair of contacts 203 are closed. Since the first pair of contacts 201 are open, for ease of understanding of this embodiment, in... Figure 3 (b) does not show the wiring connected to the first pair of contacts 201.

[0048] See Figure 3 (a) The battery management device 20 includes a connection state transition device 200 and a control device 210. The connection state transition device 200 includes a first pair of contacts 201, a second pair of contacts 202, and a third pair of contacts 203. Figure 3 In (a), the connection states of the connection state switching device 200 include: the first pair of contacts 201 are open, the second pair of contacts 202 are closed, and the third pair of contacts 203 are closed. Therefore, the two contacts of the first pair of contacts 201 are in an open state, there is no path between them, and current cannot flow from one contact to the other. The two contacts of the second pair of contacts 202 are in a closed state, meaning there is an electrical connection or path between them, for example, current can flow from one contact to the other. Similarly, the three pairs of contacts 203 are also in a closed state, meaning there is an electrical connection or path between them, for example, current can flow from one contact to the other. See also... Figure 3 (b) Since one contact of the second pair of contacts 202 is connected to the positive terminal of the first battery pack 101, and the other contact of the second pair of contacts 202 is connected to the positive terminal of the second battery pack 201, and one contact of the third pair of contacts 203 is connected to the negative terminal of the first battery pack 101, and the other contact of the third pair of contacts 203 is connected to the negative terminal of the second battery pack 201, when the first pair of contacts 201 of the connection state switching device 200 is open and the second pair of contacts 202 and the third pair of contacts 203 are closed, the positive terminals of the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected together through the second pair of contacts 202, and the negative terminals of the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected together through the third pair of contacts 203, thus the first battery pack 101 and the second battery pack 102 of the battery device 10 are in a parallel connection. Figure 3 As shown in (b), the positive terminal of the first battery pack 101 and the negative terminal of the second battery pack 102 are respectively connected to the charging device / electrical device 30. Therefore, when the connection state switching device 200 is in a state of... Figure 3 In the connection state shown (i.e., the first pair of contacts 201 is open, the second pair of contacts 202 is closed, and the third pair of contacts 203 is closed), the first battery pack 101 and the second battery pack 102 supply power to the electrical device 30 in parallel, or the first battery pack 101 and the second battery pack 102 obtain electrical energy from the charging device 30 in series.

[0049] Optionally, the first connection state includes Figure 2(a) shows the connection state, i.e., the first pair of contacts 201 of the connection state switching device 200 is on, the second pair of contacts 202 is off, and the third pair of contacts 203 is off. The second connection state includes... Figure 3 (a) shows the connection state, where the first pair of contacts 201 of the connection state switching device 200 is open, the second pair of contacts 202 is closed, and the third pair of contacts 203 is closed. For example, the connection state switching device 200 of the battery management device 20 is in the state shown in (a). Figure 2 (a) shows the first connection state; see also the section on Figure 2 According to the relevant description, at this time, the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected in series. The first battery pack 101 and the second battery pack 102 supply power to the power consumption device 30 in series, or the first battery pack 101 and the second battery pack 102 obtain electrical energy from the charging device 30 in series. Furthermore, the control device 210 can send a control signal to the connection state switching device 200, so that the control connection state switching device 200 responds to the detection of the control signal from Figure 2 The first connection state shown in (a) transitions to Figure 3 (a) shows the second connection state; see the section on... Figure 3 According to the relevant description, after conversion, the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected in parallel. The first battery pack 101 and the second battery pack 102 supply power to the power device 30 in parallel, or the first battery pack 101 and the second battery pack 102 obtain power from the charging device 30 in parallel.

[0050] Optionally, the first connection state includes Figure 3 (a) shows the connection state, i.e., the first pair of contacts 201 of the connection state switching device 200 is open, the second pair of contacts 202 is closed, and the third pair of contacts 203 is closed. The second connection state includes... Figure 2 (a) shows the connection state, where the first pair of contacts 201 of the connection state switching device 200 is on, the second pair of contacts 202 is off, and the third pair of contacts 203 is off. For example, the connection state switching device 200 of the battery management device 20 is in the state shown in (a). Figure 3 (a) shows the first connection state; see also the section on Figure 3 According to the relevant description, at this time, the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected in parallel. The first battery pack 101 and the second battery pack 102 supply power to the power consumption device 30 in parallel, or the first battery pack 101 and the second battery pack 102 obtain electrical energy from the charging device 30 in parallel. Furthermore, the control device 210 can send a control signal to the connection state switching device 200, so that the control connection state switching device 200 responds to the detection of the control signal from Figure 3 The first connection state shown in (a) transitions to Figure 2 (a) shows the second connection state; see the section on... Figure 2 According to the relevant description, after conversion, the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected in series. The first battery pack 101 and the second battery pack 102 supply power to the power device 30 in series, or the first battery pack 101 and the second battery pack 102 obtain power from the charging device 30 in series.

[0051] Since the first battery pack 101 and the second battery pack 102 of the battery device 10 exhibit different electrical characteristics when operating in series and in parallel, such as providing different voltages, the battery management device 20 in one or more embodiments of this disclosure controls the connection state switching device 200 to switch the connection state. This enables the first battery pack 101 and the second battery pack 102 of the battery device 10 connected by the connection state switching device 200 to switch from a series state to a parallel state, and / or from a parallel state to a series state. This allows the battery device 10 to be adapted to different working environments, thereby improving the compatibility of the battery device in terms of charging input and / or power output, and solving the technical problem of incompatibility between the battery device and different voltage platforms.

[0052] In an optional embodiment, the control device 210 is further configured to acquire operating environment information of the battery device 10, and the control device 210 controls the connection state transition device 200 to transition from a first connection state to a second connection state based on the operating environment information. Optionally, the operating environment information includes operating environment voltage and / or operating environment current, which may include the operating environment voltage and operating environment current of the power-consuming device. As an example, the connection state transition device 200 of the battery management device 20 is in... Figure 2 (a) shows the connection state, so the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected in series to the first power user 30 and provide power to the first power user 30; when the battery device 10 needs to connect to the second power user 30 and provide power to the second power user 30, the control device 210 can obtain the operating environment information of the battery device 10, such as the operating environment voltage of the second power user 30. The control device 210 can, when it determines that the voltage output when the first battery pack 101 and the second battery pack 102 are in parallel matches the operating environment voltage of the second power user 30, control the connection state switching device 200 to switch from parallel to parallel. Figure 2 The connection state shown in (a) is converted to Figure 3(a) shows the connection state. After the conversion, the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected to the second power-consuming device 30 in parallel and provide power to the second power-consuming device 30. Optionally, the working environment information includes working mode information. For example, the working mode information may indicate that the first battery pack 101 and the second battery pack are in a series or parallel state, and may also indicate that the connection state of the connection state conversion device 200 is the first connection state or the second connection state. As an example, the working mode information is preset, for example, including a preset sequence, and also including a preset identifier. After the control device 210 obtains the working mode information, it controls the connection state conversion device 200 to switch from the first connection state to the second connection state. Through the above implementation, the connection state conversion device 200 can be controlled to switch the connection state according to the working environment information, which also controls the first battery pack 101 and the second battery pack 102 of the battery device 10 to switch the connection state, making the battery device 10 more compatible with the working environment.

[0053] In an optional embodiment, the nominal voltage of the first battery pack 101 is the same as the nominal voltage of the second battery pack 102. Those skilled in the art will understand that the nominal voltage, or rated voltage, typically refers to the output voltage of the battery pack, and is not the actual output voltage of the battery pack. The actual voltage of the battery pack is related to factors such as battery capacity. Because the nominal voltages of the first battery pack 101 and the second battery pack 102 are the same, the first battery pack 101 and the second battery pack 102, when connected in series, will exhibit an output voltage approximately twice the nominal voltage, and when connected in parallel, will exhibit an output voltage approximately equal to the nominal voltage. Therefore, the battery device 10 including the first battery pack 101 and the second battery pack 102, according to one or more embodiments provided in this disclosure, can be adapted to different voltage environments when switching from a series state to a parallel state, or from a parallel state to a series state. For example, it can be adapted to a voltage platform corresponding to the nominal voltage, and also to a voltage platform corresponding to twice the nominal voltage.

[0054] Optionally, the operating environment information includes the operating environment voltage. The control device is further configured to control the connection state transition device to switch from the first connection state to the second connection state when it is determined that the operating environment voltage matches the nominal voltage. In an optional embodiment, the operating environment voltage includes the operating voltage of the charging device, the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the charging device, and the control device is further configured to control the charging device to charge the battery device. As an example, the nominal voltage of the first battery pack 101 and the second battery pack 102 of the battery device 10 is 400 volts. The battery device 10, the battery management device 20, and the power consumption device 30 are configured to... Figure 1 The connection is as shown, where the electrical device 30 is, for example, the motor of an electric vehicle, which is adapted to or corresponds to an 800-volt voltage platform, so the connection state switching device 200 of the battery management device 20 is in a state where... Figure 2 As shown in (a), the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected in series to provide an output voltage of 800 volts. Thus, the battery device 10 is suitable for the motor of an electric vehicle and can provide electrical energy to the electric vehicle. When the electric vehicle needs to be charged via a charging device, the battery device 10, the battery management device 20, and the charging device are connected in series. Figure 1 The connection is as shown, wherein the negative terminal of the first battery pack 101 and the positive terminal of the second battery pack 102 are connected to the charging device. The control device 210 acquires the operating environment voltage, such as the operating voltage of the charging device. When it is determined that the operating voltage, the compatible voltage range, or the voltage platform corresponding to the charging device matches the nominal voltage of 400 volts of the first battery pack 101 and the second battery pack 102, the control device 210 controls the connection state switching device 200 to switch from... Figure 2 The connection status shown in (a) has switched to... Figure 3 The connection state shown in (a) is such that the first battery pack 101 and the second battery pack 102 of the battery device 10 are changed from a series connection to a parallel connection, so that the first battery pack 101 and the second battery pack 102 of the battery device 10 provide an output voltage of about 400 volts in parallel. Thus, the battery device 10 is suitable for the charging device and can provide electrical energy to the electric vehicle through the charging device. In this way, the control device 210 can control the charging device to charge the battery device 10.

[0055] Optionally, the operating environment information includes the operating environment voltage. The control device is further configured to control the connection state transition device to switch from the first connection state to the second connection state when it is determined that the operating environment voltage matches twice the nominal voltage. In an optional embodiment, the operating environment voltage includes the operating voltage of the power-consuming device, the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the power-consuming device, and the control device is further configured to control the battery device to supply power to the power-consuming device. As an example, the nominal voltage of the first battery pack 101 and the second battery pack 102 of the battery device 10 is 400 volts, and the battery device 10, the battery management device 20, and the power-consuming device 30 are configured to... Figure 1 The connection is as shown, where the electrical device 30 is, for example, the motor of a first electric vehicle, which is adapted to or corresponds to a 400-volt voltage platform, so the connection state switching device 200 of the battery management device 20 is in a state where... Figure 3 As shown in (a), the first battery pack 101 and the second battery pack 102 of the battery device 10 are connected in parallel to provide an output voltage of 400 volts. Thus, the battery device 10 is suitable for the motor of the first electric vehicle and can provide electrical energy to the electric vehicle. When the battery device 10 is applied to the second electric vehicle, the battery device 10, the battery management device 20, and the motor of the second electric vehicle are connected in parallel... Figure 1 The connection is as shown, wherein the negative terminal of the first battery pack 101 and the positive terminal of the second battery pack 102 are connected to the motor of the second electric vehicle. When it is necessary to supply power to the electrical device, i.e., the motor of the second electric vehicle, through the battery device 10, the control device 210 acquires the operating environment voltage, such as the operating voltage of the motor of the second electric vehicle. When it is determined that its operating voltage, the compatible voltage range, or the voltage platform corresponding to the electrical device matches twice the nominal voltage of the first battery pack 101 and the second battery pack 102, i.e., 800 volts, the control device 210 controls the connection state switching device 200 to switch from... Figure 3 The connection status shown in (a) has switched to... Figure 2 (a) shows the connection state, so that the first battery pack 101 and the second battery pack 102 of the battery device 10 are changed from a parallel connection to a series connection, so that the first battery pack 101 and the second battery pack 102 of the battery device 10 provide an output voltage of about 800 volts in series. Thus, the battery device 10 is suitable for the electric device, namely the motor of the second electric vehicle, and the control device 210 can control the battery device 10 to supply power to the motor of the second electric vehicle.

[0056] In an optional embodiment, the connection state transition device includes a detection unit and a conduction unit; the control device is further configured to send a control signal to the connection state transition device; the detection unit, in response to detecting the control signal, drives the conduction unit to move from a first position to a second position; when the conduction unit is in the first position, the connection state transition device is in the first connection state; when the conduction unit is in the second position, the connection state transition device is in the second connection state. As mentioned above, the control device 210 can send a control signal to the connection state transition device 200, causing the connection state transition device 200 to transition from the first connection state to the second connection state in response to detecting the control signal. The implementation of sending the control signal can be referred to the previous description and will not be repeated here. The connection state transition device 200 can realize the function of transitioning from one connection state to another through the detection unit and the conduction unit.

[0057] Figure 4 The diagram shown is a schematic representation of the working state of a connection state transition device provided in one or more embodiments of this disclosure, wherein... Figure 4 (a) illustrates one connection state of the connection state switching device 200, in Figure 4 In (a), the connection state includes: the first pair of contacts 201 is turned on, the second pair of contacts 202 is turned off, and the third pair of contacts 202 is turned off; Figure 4 (b) A schematic diagram showing another connection state of the connection state switching device 200 is provided. Figure 4 In (b), the alternative connection state includes: the first pair of contacts 201 being open, the second pair of contacts 202 being closed, and the third pair of contacts 203 being closed. The first connection state of the connection state switching device 200 includes... Figure 4 The connection state shown in (a) includes the second connection state of the connection state switching device 200, which includes... Figure 4 (b) is used as an example for illustration: See Figure 4 (a) The connection state transition device 200 includes a first pair of contacts 201, a second pair of contacts 202, a third pair of contacts 203, a detection unit 204, and a conduction unit 205. The conduction unit 205 is in a first position. When in the first position, the conduction unit 205 can conduct the first pair of contacts 201, but not conduct the second pair of contacts 202 and the third pair of contacts 203. Thus, the first pair of contacts 201 is in a conducting state, the second pair of contacts 202 is in a disconnected state, and the third pair of contacts 203 is also in a disconnected state. The detection unit 204, in response to detecting a control signal, drives the conduction unit 205 from... Figure 4 The first position shown in (a) is moved to Figure 4 The second position is shown in (b). See also Figure 4(b) In the second position, the conducting unit 205 is de-conducting the first pair of contacts 201 and conducting the second pair of contacts 202 and the third pair of contacts 203. Thus, the first pair of contacts 201 is in an open state, the second pair of contacts 202 is in a conducting state, and the third pair of contacts 203 is also in a conducting state. Optionally, the connection state switching device 200 includes a relay or a contactor. As an example, the connection state switching device 200 includes a multi-contact electromagnetic relay, and the detection unit 204 of the connection state switching device 200 includes an electromagnetic mechanism (those skilled in the art will understand that common electromagnetic mechanisms can control the conducting unit to realize the opening and closing function of the electromagnetic relay based on electromagnetic force and elastic components). The control signal is, for example, an electrical signal after energization. When the detection unit 204 does not detect the control signal, the conducting unit 205 is in the open state. Figure 4 (a) In the first position shown, when the conducting unit 205 is in the first position, the first connecting portion 2051 of the conducting unit 205 contacts the first pair of contacts 201, thereby conducting the first pair of contacts 201. The conducting unit 205 also includes a second connecting portion 2052, which does not contact the first pair of contacts 201, the second pair of contacts 202, and the third pair of contacts 203, thereby not conducting the second pair of contacts 202 and the third pair of contacts 203. When the control device 210 of the battery management device 20 sends a control signal, for example, to energize the circuit corresponding to the detection unit 204, the detection unit 204 (which includes an electromagnetic mechanism) connected to the state transition device 200 generates an electromagnetic force in response to detecting that the circuit is energized, driving the conducting unit 205 from... Figure 4 The first position shown in (a) is moved to Figure 4 (b) In the second position shown, when the conducting unit 205 is in the second position, the first connecting portion 2051 of the conducting unit 205 contacts the second pair of contacts 202, thereby connecting the second pair of contacts 202. The second connecting portion 2052 of the conducting unit 205 contacts the third pair of contacts 203, thereby connecting the second pair of contacts 203. At this time, the first connecting portion 2051 does not contact the first pair of contacts 201, thus not connecting the first pair of contacts 201. In one or more optional embodiments of this disclosure, the conducting unit 205 moves as a whole during the process of moving from the first position to the second position, which can make the switching performance more stable during the process of connecting and disconnecting multiple contacts of the connection state transition unit.

[0058] Figure 5 The diagram shown is a schematic representation of the working state of another connection state switching device provided in one or more embodiments of this disclosure, wherein... Figure 5 (a) illustrates one connection state of the connection state switching device 200, in Figure 5In (a), the connection state includes: the first pair of contacts 201 is open, the second pair of contacts 202 is closed, and the third pair of contacts 202 is closed; Figure 5 (b) A schematic diagram showing another connection state of the connection state switching device 200 is provided. Figure 5 In (b), the other connection state includes: the first pair of contacts 201 being on, the second pair of contacts 202 being off, and the third pair of contacts 203 being off. The first connection state of the connection state switching device 200 includes... Figure 5 The connection state shown in (a) includes the second connection state of the connection state switching device 200, which includes... Figure 5 (b) is used as an example for illustration: See Figure 5 (a) The connection state transition device 200 includes a first pair of contacts 201, a second pair of contacts 202, a third pair of contacts 203, a detection unit 204, and a conduction unit 205. The conduction unit 205 is in a first position. When in the first position, the conduction unit 205 is able to de-conduct the first pair of contacts 201 and conduct the second pair of contacts 202 and the third pair of contacts 203. Thus, the first pair of contacts 201 is in an open state, the second pair of contacts 202 is in a conducting state, and the third pair of contacts 203 is also in a conducting state. The detection unit 204, in response to detecting a control signal, drives the conduction unit 205 from... Figure 5 The first position shown in (a) is moved to Figure 5 The second position is shown in (b). See also Figure 5 (b) wherein the conducting unit 205 is in a second position, which enables the first pair of contacts 201 to be connected, but does not connect the second pair of contacts 202 and the third pair of contacts 203, thereby making the first pair of contacts 201 connected, the second pair of contacts 202 disconnected, and the third pair of contacts 203 disconnected. Optionally, the connection state switching device 200 includes a relay or a contactor. As an example, the connection state switching device 200 includes a multi-contact electromagnetic relay, and the detection unit 204 of the connection state switching device 200 includes an electromagnetic mechanism, and the control signal includes, for example, a power-off signal. The detection unit 204 (which includes the electromagnetic mechanism) generates an electromagnetic force when the corresponding circuit is energized, causing the conducting unit 205 to be in the second position. Figure 5(a) In the first position shown, when the conducting unit 205 is in the first position, the first connecting portion 2051 of the conducting unit 205 does not contact the first pair of contacts 201, thus not conducting the first pair of contacts 201. The conducting unit 205 also includes a second connecting portion 2052 and a third connecting portion 2053. The second connecting portion 2052 contacts the second pair of contacts 202, thus conducting the second pair of contacts 202. The third connecting portion 2053 contacts the third pair of contacts 203, thus conducting the third pair of contacts 203. When the control device 210 of the battery management device 20 sends a control signal, for example, to de-energize the circuit corresponding to the detection unit 204, the detection unit 204 (which includes an electromagnetic mechanism) connected to the state transition device 200 responds to the detection of the circuit de-energization, causing the electromagnetic force to disappear, and drives the conducting unit 205 from... Figure 5 The first position shown in (a) is moved to Figure 5 (b) In the second position shown, when the conducting unit 205 is in the second position, the first connecting portion 2051 of the conducting unit 205 contacts the first pair of contacts 201, thereby connecting the first pair of contacts 201. The second connecting portion 2052 does not contact the second pair of contacts 202, thus not connecting the second pair of contacts 202. The third connecting portion 2053 does not contact the third pair of contacts 203, thus not connecting the third pair of contacts 203. In one or more optional embodiments of this disclosure, the conducting unit 205 moves as a whole during the process of moving from the first position to the second position, which can make the switching performance more stable during the process of connecting and disconnecting multiple contacts of the connection state transition unit.

[0059] This disclosure also provides a battery system, which may include the battery management device 20 as described in one or more of the foregoing embodiments, and may also include the battery device 10 as described in one or more of the foregoing embodiments. The battery device 10 may include, for example, a first battery pack 101 and a second battery pack 102 as described in one or more of the foregoing embodiments. The connection method between the battery device 10 and the battery management device 20 can be referred to... Figure 1 The connection method between the battery device 10 and the battery management device 20 will not be described here.

[0060] This disclosure also provides a connection state switching device, which may include the connection state switching device 200 as described in one or more of the foregoing embodiments. The connection state switching device can be used to connect to a battery device 10 as described in one or more of the foregoing embodiments. The battery device 10 includes a first battery pack 101 and a second battery pack 102 as described in one or more of the foregoing embodiments. Thus, the connection state switching device can change the connection state, thereby changing the connection state of the battery device 10, for example, switching the first battery pack 101 and the second battery pack 102 between a series connection and a parallel connection.

[0061] This disclosure also provides a battery device, which may include a first battery pack and a second battery pack. The battery device may also include a connection state switching device 200 as described in one or more of the foregoing embodiments. The connection method between the connection state switching device 200 and the first and second battery packs can refer to the connection method between the first battery pack 101 and the second battery pack 102 and the connection state switching device 200 in one or more of the foregoing embodiments. Thus, the connection state switching device 200 can change the connection state, thereby changing the connection state of the battery device, for example, switching the first and second battery packs between a series connection and a parallel connection. For example, the connection state switching device changes the connection state in response to a control signal from a BMS external to the battery device.

[0062] This disclosure also provides an electric vehicle, which may include one or more of the battery device, battery management device, and connection state transition device provided in one or more embodiments of this disclosure.

[0063] This disclosure also provides a battery management method. Figure 6 A schematic flowchart of a battery management method provided in this disclosure is shown. It should be understood that... Figure 6 The steps or operations described are merely examples; other operations or procedures may be performed in the embodiments of this disclosure. Figure 6 Variations of various operations. Furthermore, Figure 6 Each step in the process can be followed separately according to... Figure 6 The different orders presented may be executed, and it is possible that they are not intended to be executed. Figure 6 All operations within.

[0064] Figure 6The method 600 shown can be applied to a battery management device, such as the battery management device 20 in one or more of the foregoing embodiments. The method 600 will be described below, but it should be understood that the embodiments disclosed herein are not limited thereto. For example, the battery management device 20 used in method 600 includes a connection state transition device 200, which includes a first pair of contacts 201, a second pair of contacts 202, and a third pair of contacts 203. One contact in the first pair of contacts 201 is used to connect to the positive terminal of the first battery pack 101 of the battery device 10, and the other contact in the first pair of contacts 201 is used to connect to the negative terminal of the second battery pack 102 of the battery device 10. One contact in the second pair of contacts 202 is used to connect to the positive terminal of the first battery pack 101, and the other contact in the second pair of contacts 202 is used to connect to the positive terminal of the second battery pack 102. One contact in the third pair of contacts 203 is used to connect to the negative terminal of the first battery pack 101, and the other contact in the third pair of contacts 203 is used to connect to the negative terminal of the second battery pack 102. Furthermore, the positive and negative terminals of the battery device 10 can be connected to a charging device / electrical device 30 to supply power to the electrical device or to charge it via the charging device. Method 600 includes the following steps:

[0065] S601, Obtain the operating environment information of the battery device;

[0066] In step S601, for example, the battery management device 20 may acquire the operating environment information of the battery device 10. As an example, the operating environment information includes the operating environment voltage and / or operating environment current. The operating environment voltage and current may include the operating environment voltage and current of the power-consuming device 30, or the operating environment voltage and current of the charging device 30. The operating environment information of the battery device can be referred to the descriptions in one or more of the foregoing embodiments, and will not be repeated here.

[0067] S602, based on the working environment information, control the connection state switching device to switch from the first connection state to the second connection state.

[0068] In step S602, for example, the battery management device 20 can control the connection state switching device 200 of the battery management device to switch from a first connection state to a second connection state based on the acquired operating environment information. In one optional embodiment, the first connection state includes: the first pair of contacts 201 being on, the second pair of contacts 202 being off, and the third pair of contacts 203 being off; the second connection state includes: the first pair of contacts 201 being off, the second pair of contacts 202 being on, and the third pair of contacts 203 being on. In another optional embodiment, the first connection state includes: the first pair of contacts 201 being off, the second pair of contacts 202 being on, and the third pair of contacts 203 being on; the second connection state includes: the first pair of contacts 201 being on, the second pair of contacts 202 being off, and the third pair of contacts 203 being off. As an example, when the connection state transition device 200 of the battery management device 20 is in a first connection state, the battery management device obtains voltage platform information corresponding to the power-consuming device 30, such as the motor of an electric vehicle, and transitions the connection state transition device 200 from the first connection state to a second connection state based on the obtained voltage platform information. As another example, when the connection state transition device 200 of the battery management device 20 is in a second connection state, the battery management device obtains voltage platform information corresponding to the charging device 30, such as a charging pile, and transitions the connection state transition device 200 from the second connection state to the first connection state based on the obtained voltage platform information. Regarding how the battery management device 20 controls the connection state transition device 200 to transition between connection states, one or more of the foregoing embodiments can be referred to. For example, the battery management device 20 can implement the function of the control device 210 and / or execute corresponding steps, which will not be elaborated further here.

[0069] Since the first battery pack 101 and the second battery pack 102 of the battery device 10 exhibit different electrical characteristics when operating in series and in parallel, such as providing different voltages, the battery management method in one or more embodiments provided in this disclosure can control the connection state switching device 200 to switch the connection state, thereby causing the first battery pack 101 and the second battery pack 102 of the battery device 10 connected by the connection state switching device 200 to switch from a series state to a parallel state, and / or from a parallel state to a series state. This allows the battery device 10 to be adapted to different working environments, thereby improving the compatibility of the battery device in terms of charging input and / or power output, and solving the technical problem of incompatibility between the battery device and different voltage platforms.

[0070] In an optional embodiment, the operating environment information includes the operating environment voltage, wherein the nominal voltage of the first battery pack 101 is the same as the nominal voltage of the second battery pack 102; the method 600 further includes controlling the connection state transition device 200 to transition from a first connection state to a second connection state when it is determined that the operating environment voltage matches the nominal voltage, or the method 600 further includes controlling the connection state transition device 200 to transition from the first connection state to the second connection state when it is determined that the operating environment voltage matches twice the nominal voltage. The implementation methods for determining how the operating environment voltage matches the nominal voltage, and how to determine how the operating environment voltage matches twice the nominal voltage, can be referred to the descriptions in one or more of the foregoing embodiments, and will not be repeated here.

[0071] Optionally, the operating environment voltage includes the operating voltage of the charging device 30. The negative terminal of the first battery pack 101 and the positive terminal of the second battery pack 102 are connected to the charging device 30. For example, after the battery management device 20 controls the connection state transition device 200 to transition from the first connection state to the second connection state, method 600 further includes: controlling the charging device 30 to charge the battery device 10. Optionally, the operating environment voltage includes the operating voltage of the power-consuming device 30. The negative terminal of the first battery pack 101 and the positive terminal of the second battery pack 102 are connected to the power-consuming device 30. For example, after the battery management device 20 controls the connection state transition device 200 to transition from the first connection state to the second connection state, method 600 further includes: controlling the battery device 10 to supply power to the power-consuming device 30. Regarding how to supply power to the power-consuming device 30 and / or supply power to the battery device 10 through the charging device 30 after the connection state transition, please refer to the description in one or more of the foregoing embodiments, which will not be repeated here.

[0072] In an optional embodiment, the connection state transition device 200 includes a detection unit 204 and a conduction unit 205. The method 600 further includes: sending a control signal to the connection state transition device 200 based on operating environment information, so that the detection unit 204, in response to detecting the control signal, drives the conduction unit 205 to move from a first position to a second position; when the conduction unit 205 is in the first position, the connection state transition device 200 is in a first connection state; when the conduction unit 205 is in the second position, the connection state transition device 200 is in a second connection state. Optionally, the conduction unit 205 includes a first conduction part 2051 and a second conduction part 2052. For example, when the conduction unit 205 is in the first position... Figure 4In the first position shown in (a), the first connecting portion 2051 contacts the first pair of contacts 201, thereby connecting the first pair of contacts 201. The second connecting portion 2052 does not contact the first pair of contacts 201, the second pair of contacts 202, and the third pair of contacts 203, thereby not connecting the second pair of contacts 202 and the third pair of contacts 203. When the battery management device 20 sends a control signal, the detection unit 204 connected to the state transition device 200 responds to the detection of the control signal and drives the conduction unit 205 from... Figure 4 The first position shown in (a) is moved to Figure 4 (b) In the second position shown, when the conducting unit 205 is in the second position, the first connecting portion 2051 of the conducting unit 205 contacts the second pair of contacts 202, thereby connecting the second pair of contacts 202. The second connecting portion 2052 of the conducting unit 205 contacts the third pair of contacts 203, thereby connecting the second pair of contacts 203. At this time, the first connecting portion 2051 does not contact the first pair of contacts 201, thereby not connecting the first pair of contacts 201. Regarding how to make the detection unit 204 respond to the detection of the control signal and drive the conducting unit 205 to move from the first position to the second position, one or more of the above embodiments can be referred to, and will not be repeated here.

[0073] Figure 7 A schematic block diagram of a computing device 700 according to an alternative embodiment of the present disclosure is shown. Figure 7 As shown, the computing device 700 includes a memory 710 and a processor 720. The memory 710 is coupled to the processor 720. The memory 710 is used to store program instructions, and the processor 720 is used to call the program instructions stored in the memory 710 to execute the methods of the various embodiments of this disclosure described above.

[0074] This disclosure also provides a computer-readable storage medium for storing a computer program that performs the methods described in the various embodiments of this disclosure.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit them. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A battery management device for managing a battery device, characterized in that, The battery management device includes: A control device and a connection state transition device; the connection state transition device includes a first pair of contacts, a second pair of contacts, and a third pair of contacts; One of the first pair of contacts is used to connect to the positive terminal of the first battery pack of the battery device, and the other contact in the first pair of contacts is used to connect to the negative terminal of the second battery pack of the battery device. One of the contacts in the second pair is used to connect to the positive terminal of the first battery pack, and the other contact in the second pair is used to connect to the positive terminal of the second battery pack. One of the contacts in the third pair is used to connect to the negative terminal of the first battery pack, and the other contact in the third pair is used to connect to the negative terminal of the second battery pack. The control device is used to control the connection state switching device to switch from a first connection state to a second connection state; The first connection state includes: the first pair of contacts is on, the second pair of contacts is off, and the third pair of contacts is off; the second connection state includes: the first pair of contacts is off, the second pair of contacts is on, and the third pair of contacts is on; or The first connection state includes: the first pair of contacts is open, the second pair of contacts is closed, and the third pair of contacts is closed; the second connection state includes: the first pair of contacts is closed, the second pair of contacts is open, and the third pair of contacts is open. The connection state transition device includes a detection unit and a conduction unit; The control device is also used to send control signals to the connection state transition device; In response to detecting the control signal, the detection unit drives the conduction unit to move from the first position to the second position; When the conducting unit is in the first position, the connection state switching device is in the first connection state; When the conducting unit is in the second position, the connection state switching device is in the second connection state.

2. The battery management device according to claim 1, characterized in that, The control device is also used to acquire the operating environment information of the battery device; The control device controls the connection state switching device to switch from the first connection state to the second connection state based on the working environment information.

3. The battery management device according to claim 2, characterized in that, The operating environment information includes the operating environment voltage, and the nominal voltage of the first battery pack is the same as the nominal voltage of the second battery pack. The control device is also used to control the connection state switching device to switch from the first connection state to the second connection state when it is determined that the operating environment voltage matches the nominal voltage.

4. The battery management device according to claim 2, characterized in that, The operating environment information includes the operating environment voltage, and the nominal voltage of the first battery pack is the same as the nominal voltage of the second battery pack. The control device is also used to control the connection state switching device to switch from the first connection state to the second connection state when it is determined that the operating environment voltage matches twice the nominal voltage.

5. The battery management device according to claim 3 or 4, characterized in that, The operating environment voltage includes the operating voltage of the charging device, and the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the charging device. The control device is also used to control the charging device to charge the battery device.

6. The battery management device according to claim 3 or 4, characterized in that, The operating environment voltage includes the operating voltage of the electrical device, and the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the electrical device. The control device is also used to control the battery device to supply power to the electrical device.

7. A battery system, characterized in that, The battery system includes the battery management device as described in any one of claims 1-6, and further includes the battery device.

8. A battery management method, applied to a battery management device to manage the battery device, characterized in that, The battery management device includes a connection state transition device; the connection state transition device includes a first pair of contacts, a second pair of contacts, and a third pair of contacts; one contact of the first pair of contacts is used to connect to the positive terminal of a first battery pack of the battery device, and the other contact of the first pair of contacts is used to connect to the negative terminal of a second battery pack of the battery device; one contact of the second pair of contacts is used to connect to the positive terminal of the first battery pack, and the other contact of the second pair of contacts is used to connect to the positive terminal of the second battery pack; one contact of the third pair of contacts is used to connect to the negative terminal of the first battery pack, and the other contact of the third pair of contacts is used to connect to the negative terminal of the second battery pack; the first connection state of the connection state transition device includes: the first pair of contacts is on, the second pair of contacts is off, and the third pair of contacts is off. The second connection state of the connection state switching device includes: the first pair of contacts being open, the second pair of contacts being closed, and the third pair of contacts being closed; or, the first connection state includes: the first pair of contacts being open, the second pair of contacts being closed, and the third pair of contacts being closed, and the second connection state includes: the first pair of contacts being closed, the second pair of contacts being open, and the third pair of contacts being open; the connection state switching device includes a detection unit and a conduction unit; the detection unit, in response to detecting a control signal, drives the conduction unit to move from a first position to a second position; when the conduction unit is in the first position, the connection state switching device is in the first connection state; when the conduction unit is in the second position, the connection state switching device is in the second connection state; the method includes: Obtain the operating environment information of the battery device; The connection state switching device is controlled to switch from the first connection state to the second connection state based on the working environment information.

9. The battery management method according to claim 8, characterized in that, The operating environment information includes the operating environment voltage, and the nominal voltage of the first battery pack is the same as the nominal voltage of the second battery pack. The step of controlling the connection state transition device to switch from the first connection state to the second connection state based on the working environment information includes: When it is determined that the operating environment voltage matches the nominal voltage, the connection state switching device is controlled to switch from the first connection state to the second connection state.

10. The battery management method according to claim 8, characterized in that, The operating environment information includes the operating environment voltage, and the nominal voltage of the first battery pack is the same as the nominal voltage of the second battery pack. The step of controlling the connection state transition device to switch from the first connection state to the second connection state based on the working environment information includes: When it is determined that the operating environment voltage matches twice the nominal voltage, the connection state switching device is controlled to switch from the first connection state to the second connection state.

11. The battery management method according to claim 9 or 10, characterized in that, The operating environment voltage includes the operating voltage of the charging device, and the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the charging device. After controlling the connection state transition device to transition from the first connection state to the second connection state, the method further includes: controlling the charging device to charge the battery device.

12. The battery management method according to claim 9 or 10, characterized in that, The operating environment voltage includes the operating voltage of the electrical device, and the negative terminal of the first battery pack and the positive terminal of the second battery pack are connected to the electrical device. After controlling the connection state transition device to transition from the first connection state to the second connection state, the method further includes: controlling the battery device to supply power to the power-consuming device.

13. The battery management method according to claim 9, characterized in that, The step of controlling the connection state transition device to switch from the first connection state to the second connection state based on the working environment information includes: According to the working environment information, a control signal is sent to the connection state transition device so that the detection unit responds to the detection of the control signal and drives the conduction unit to move from the first position to the second position; When the conducting unit is in the first position, the connection state switching device is in the first connection state; when the conducting unit is in the second position, the connection state switching device is in the second connection state.

14. A computing device, comprising a processor and a memory, characterized in that, The memory stores computer instructions, and the processor is configured to execute the computer instructions to cause the computing device to implement the battery management method according to any one of claims 8-13.

15. A computer storage medium for storing computer instructions, characterized in that, When the computer instructions are executed by the computing device, the computing device implements the battery management method according to any one of claims 8-13.

16. A connection state switching device, characterized in that, include: The first pair of contacts, the second pair of contacts, the third pair of contacts, and the connection control device; One of the first pair of contacts is used to connect to the positive terminal of the first battery pack, and the other contact in the first pair of contacts is used to connect to the negative terminal of the second battery pack. One of the contacts in the second pair is used to connect to the positive terminal of the first battery pack, and the other contact in the second pair is used to connect to the positive terminal of the second battery pack. One of the contacts in the third pair is used to connect to the negative terminal of the first battery pack, and the other contact in the third pair is used to connect to the negative terminal of the second battery pack. The connection control device responds to the detection of a control signal by causing the connection state switching device to switch from a first connection state to a second connection state; The first connection state includes: the first pair of contacts is on, the second pair of contacts is off, and the third pair of contacts is off; the second connection state includes: the first pair of contacts is off, the second pair of contacts is on, and the third pair of contacts is on; or The first connection state includes: the first pair of contacts is open, the second pair of contacts is closed, and the third pair of contacts is closed; the second connection state includes: the first pair of contacts is closed, the second pair of contacts is open, and the third pair of contacts is open. The device includes a detection unit and a conduction unit; the detection unit, in response to detecting a control signal, drives the conduction unit to move from a first position to a second position; when the conduction unit is in the first position, the connection state switching device is in the first connection state; when the conduction unit is in the second position, the connection state switching device is in the second connection state.

17. A battery device, characterized in that, The device includes the connection state switching device of claim 16, and further includes the first battery pack and the second battery pack.

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