Battery pack, power supply method, power supply device and computer equipment

Abstract

The invention relates to a battery pack, a power supply method, a power supply device and computer equipment. The battery pack comprises a battery module, a first output end and a second output end, the battery module is electrically connected with the first output end, and the first output end is used for supplying power to high-voltage equipment; the battery module comprises a preset battery unit, the preset battery unit is electrically connected with a second output end, and the second output end is used for supplying power to the low-voltage equipment. In the battery pack, the power supply method, the power supply device and the computer equipment, the battery module supplies power to the high-voltage equipment through the first output end, and the preset battery unit in the battery module is electrically connected with the second output end and supplies power to the low-voltage equipment. In an emergency, power is supplied to the low-voltage equipment through the preset battery unit, so that the battery module can smoothly supply power to the high-voltage equipment.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack, a power supply method, a power supply device and a computer device. Background Art

[0002] In traditional technology, low-voltage devices are often used to drive battery packs, so that low-voltage devices can provide power to high-voltage devices. However, when the low-voltage device fails, the battery pack will not work and will not be able to supply power to the low-voltage device, which will affect the operation of the low-voltage device. Summary of the invention

[0003] Based on this, it is necessary to provide a battery pack, a power supply method, a power supply device and a computer device that solve the problem that the battery pack cannot work when a low-voltage device fails. On the one hand, the present invention provides a battery pack: a battery module, a first output terminal and a second output terminal;

[0004] The battery module is electrically connected to the first output end, and the first output end is used to supply power to the high-voltage device;

[0005] The battery module includes a preset battery unit, the preset battery unit is electrically connected to the second output end, and the second output end is used to supply power to the low-voltage device.

[0006] In one embodiment, the battery pack further comprises:

[0007] a switch, wherein a first end of the switch is electrically connected to a preset battery unit, and a second end of the switch is electrically connected to the second output end;

[0008] When the switch is closed, the preset battery unit is connected to the second output terminal;

[0009] When the switch is turned off, the preset battery unit is disconnected from the second output terminal.

[0010] In one embodiment, the battery pack further comprises:

[0011] A control module is connected to the control end of the switch, and is used to control the switch to be closed or opened.

[0012] In one embodiment, the battery pack further includes a voltage conversion module, and the voltage conversion module connects the preset battery unit and the second output end.

[0013] The voltage conversion module includes: a transformer unit and a voltage stabilizing unit. The transformer unit is connected to the preset battery unit through the switch and is used to transform the voltage of the preset battery unit. The two ends of the voltage stabilizing unit are respectively connected to the transformer unit and the second output end, and are used to stabilize the voltage output by the transformer unit and output it to the second output end. The transformer unit includes a drive circuit and a transformer element. The drive circuit is connected to the transformer element and the preset battery unit and is used to drive the transformer element to perform voltage conversion under the control of the control module. The transformer element is connected to the drive circuit and the second output end.

[0014] In one aspect, the present invention provides a power supply method, which is applied to the aforementioned battery pack, and the method comprises:

[0015] When the low-voltage device is powered by the low-voltage power supply, detecting a state in which the low-voltage power supply supplies power to the second output terminal;

[0016] When an abnormal power supply state is detected, power is supplied to the low-voltage device through the second output terminal.

[0017] In one embodiment, the method further comprises:

[0018] A first power supply circuit for the low-voltage power supply to supply power to the low-voltage device and a second power supply circuit for the preset battery unit to supply power to the low-voltage device are conducted.

[0019] In one embodiment, the method further comprises:

[0020] receiving an instruction to replace the battery pack;

[0021] In response to the instruction, power is supplied to the low-voltage device through the second output terminal.

[0022] In one aspect, the present invention provides a power supply device, the device comprising:

[0023] A detection subunit, used for detecting a state in which the low-voltage power supply supplies power to the low-voltage device when the low-voltage power supply supplies power to the low-voltage device;

[0024] The control subunit is used to supply power to the low-voltage device through the second output terminal when an abnormal power supply state is detected.

[0025] In one aspect, the present invention provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the aforementioned method when executing the computer program.

[0026] In the battery pack, power supply method, power supply device and computer equipment, the battery module supplies power to the high-voltage device through the first output terminal, and the preset battery unit in the battery module is electrically connected to the second output terminal and supplies power to the low-voltage device. In an emergency, the preset battery unit supplies power to the low-voltage device, so that the battery module can smoothly supply power to the high-voltage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of a vehicle power supply system provided by an embodiment;

[0029] Figure 2 A schematic diagram of a battery pack provided by an embodiment;

[0030] Figure 3 A schematic diagram of a battery pack connection relationship provided by an embodiment;

[0031] Figure 4 A flow chart of a power supply method provided by an embodiment;

[0032] Figure 5 A logic diagram of a power supply method provided by an embodiment;

[0033] Figure 6 A flow chart of a power supply method provided in another embodiment;

[0034] Figure 7 A schematic diagram of a power supply device provided in an embodiment.

[0035] Explanation of the reference numerals in the accompanying drawings: vehicle power supply system-10; low-voltage power supply-10; low-voltage equipment-11; battery pack-12; first output terminal-120; second output terminal-121; battery management unit-1211; battery module-122; preset battery cell-1221; switch-123; control module-124; voltage conversion module-125; transformer unit-1251; drive circuit-1251a; transformer device-1251b; voltage stabilizing unit-1252; high-voltage equipment-13. DETAILED DESCRIPTION

[0036] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0038] It can be understood that the terms "first", "second", etc. used in the present application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element.

[0039] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0040] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0041] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0042] In one embodiment, see Figure 1 , a vehicle power supply system 10 is provided, which can be applied to a vehicle system. The vehicle power supply system 10 includes a low-voltage power source 10, a low-voltage device 11, a battery pack 12 and a high-voltage device 13.

[0043] The low-voltage power supply 10 is connected to the low-voltage device 11, and the low-voltage device 11 is connected to the battery pack 12, and the low-voltage device 11 is used to provide low-voltage power to the battery pack 12. When the low-voltage device 11 supplies power to the battery pack 12, the battery pack 12 can provide high-voltage power to the high-voltage device 13. As an example, the voltage range of the low-voltage device 11 can be 5V-20V, and specifically, the voltage value of the low-voltage device 11 can be 12V. In another example, the power supply voltage range of the battery pack 12 can be 400V-800V. At this time, the high-voltage device 13 can be a new energy vehicle.

[0044] In an emergency, the low voltage power source 10 may fail, causing the low voltage device 11 to fail to work properly, thereby affecting the normal operation of the battery pack 12, making the battery pack 12 unable to supply high voltage, which will cause the high voltage device 13 to fail to start normally. Based on this, please refer to Figure 2 and Figure 3 The present application provides a battery pack 12 . The battery pack 12 includes: a first output terminal 120 , a second output terminal 121 , and a battery module 122 .

[0045] The first output terminal 120 is connected to the high-voltage device 13, and is used to supply power to the high-voltage device 13. The battery pack 12 is connected to the high-voltage device 13 through the first output terminal 120, and provides power to the high-voltage device 13. As an example, the high-voltage device 13 can be a vehicle or the like.

[0046] The second output terminal 121 is connected to the low-voltage device 11 for supplying power to the low-voltage device 11. The battery pack 12 is connected to the low-voltage device 11 via the second output terminal 121 to provide power to the low-voltage device 11. As an example, the output voltage of the second output terminal 121 (i.e., the operating voltage of the low-voltage device 11) may range from 5V to 20V. As an example, the low-voltage device 11 may include a battery management unit (BMS) 1211, etc.

[0047] It can be understood that after the low voltage device 11 is working, the battery module 122 can provide high voltage power to the high voltage device 13. As an example, the battery module 122 can provide a voltage of 400V-800V to the outside.

[0048] The battery module 122 includes a preset battery cell 1221. The preset battery cell 1221 is connected to the second output terminal 121 inside the battery pack 12, and the low-voltage device 11 is powered by the second output terminal 121. As an example, the preset battery cell 1221 can provide a voltage of 9V-16V. Specifically, the preset battery cell 1221 may include a plurality of connected lithium iron phosphate battery modules or ternary lithium battery modules.

[0049] When a power supply failure occurs in the low-voltage device 11, the battery pack 12 will be unable to provide high-voltage power supply. In this embodiment, by setting a preset battery unit 1221 in the battery module 122, when a power supply failure occurs in the low-voltage device 11, the preset battery unit 1221 supplies power to the low-voltage device 11 through the second output terminal 121, thereby starting the low-voltage device 11, so that the low-voltage device 11 starts the battery pack 12, and finally the battery pack 12 provides high-voltage power supply normally.

[0050] In one embodiment, the battery pack 12 includes a switch 123 .

[0051] A first end of the switch 123 is connected to the preset battery unit 1221 . A second end of the switch 123 is connected to the second output end 121 .

[0052] When the switch 123 is closed, the preset battery unit 1221 is connected to the second output terminal 121 . At this time, the preset battery unit 1221 can supply power to the second output terminal 121 .

[0053] When the switch 123 is disconnected, the preset battery unit 1221 is disconnected from the second output terminal 121. At this time, the preset battery unit 1221 cannot supply power to the second output terminal 121. As an example, the switch 123 may include a switch such as a field effect transistor.

[0054] In one embodiment, the battery pack 12 includes a control module 124 .

[0055] The control module 124 is connected to the control end of the switch 123. The control module 124 is used to control the switch 123 to be turned on or off. As an example, when the switch 123 is a field effect transistor, the control module 124 is connected to the gate of the field effect transistor. At the same time, one of the source and the drain of the field effect transistor is the first end of the switch 123, connected to the preset battery unit 1221. The other of the source and the drain of the field effect transistor is the second end of the switch 123, connected to the second output terminal 121.

[0056] As an example, the battery management unit 1211 may serve as the control module 124 .

[0057] In the vehicle power supply system 10, the low-voltage device 11 can always provide low-voltage power to the battery pack 12, that is, the circuit between the low-voltage device 11 and the battery pack 12 can always be turned on. In an emergency, the low-voltage device 11 cannot provide low-voltage power to the battery pack 12. At this time, the control module 124 controls the switch 123 to be turned on, so that the preset battery unit 1221 provides low-voltage power to the low-voltage device 11 through the second output terminal 121, and then the battery pack 12 can be powered with high voltage.

[0058] In one embodiment, see Figure 3 The battery pack 12 also includes a voltage conversion module 125 .

[0059] The voltage conversion module 125 is located between the preset battery unit 1221 and the second output terminal 121. The voltage conversion module 125 is used to convert the voltage output by the preset battery unit 1221 into the input voltage of the second output terminal 121. For example, when the preset battery unit 1221 outputs a 9V voltage and the input voltage of the second output terminal 121 is 12V, the voltage conversion module 125 needs to convert the 9V voltage into 12V.

[0060] Specifically, the two ends of the switch 123 can be connected to the preset battery unit 1221 and the voltage conversion module 125 respectively. Of course, the voltage conversion module 125 can also be located between the switch 123 and the preset battery unit 1221.

[0061] In this embodiment, when the voltage output by the preset battery unit 1221 is not equal to the operating voltage of the second output terminal 121, the voltage conversion module 125 may be provided. Of course, in some embodiments, when the voltage output by the preset battery unit 1221 is equal to the operating voltage of the second output terminal 121, the voltage conversion module 125 may not be provided.

[0062] In one embodiment, see Figure 3 The voltage conversion module 125 includes a voltage transformation unit 1251 and a voltage stabilization unit 1252 .

[0063] The voltage transformation unit 1251 is connected to the preset battery unit 1221 via the switch 123 , and the voltage transformation unit 1251 is used to transform the voltage output by the preset battery unit 1221 .

[0064] Specifically, the voltage transformation unit 1251 includes a driving circuit 1251a and a transformer 1251b. The driving circuit 1251a is connected to the transformer 1251b and the control module 124. The driving circuit 1251a is used to drive the transformer 1251b to perform voltage transformation under the control of the control module 124, and the transformer 1251b is mainly used to transform the voltage output by the preset battery unit 1221. For example, the transformer 1251b may include a transformer.

[0065] For example, two ends of the voltage stabilizing unit 1252 are respectively connected to the voltage transformation unit 1251 and the battery management unit 1211 . The voltage stabilizing unit 1252 is used to stabilize the voltage output by the voltage transformation unit 1251 and output it to the battery management unit 1211 .

[0066] In addition, the voltage conversion module 125 may further include a filtering unit (not shown), which is used to filter out unnecessary bands.

[0067] Figure 3The internal circuit connection relationship of the battery pack 12 is exemplarily shown. The battery module 122 in the battery pack 12 is not only provided with a preset battery unit 1221, but also with other battery units. The preset battery unit 1221 and other battery units can form a battery module 122 together by connecting in series and parallel, so as to provide high voltage power supply. It can be understood that the preset battery unit 1221 can be composed of some battery modules in the battery module 122.

[0068] For example, when the vehicle system is working normally, the battery management unit 1211 controls the battery module 122 to provide high voltage for the vehicle system. When an emergency occurs, the preset battery unit 1221 is used to power the battery management unit 1211, and the battery module 122 provides high voltage for the vehicle system.

[0069] The preset battery cell 1221 is grounded at one end and connected to the switch 123 at the other end. The switch 123 is a field effect transistor, which includes a gate, a source and a drain. The preset battery cell 1221 can be connected to the source. At the same time, the gate is connected to the battery management unit 1211 (for example, the battery management unit 1211 can be used as a control module 124 at this time). When the voltage applied to the gate by the battery management unit 1211 exceeds the threshold voltage, the field effect tube is turned on. Conversely, when the voltage applied to the gate by the battery management unit 1211 is less than the threshold voltage, the field effect tube is disconnected. The drain can be connected to the voltage conversion module 125.

[0070] The voltage conversion module 125 may include a driving circuit 1251 a , a transformer 1251 b , and a voltage stabilizing unit 1252 , which are arranged in sequence.

[0071] The drain of the field effect transistor connected to the driving circuit 1251a is connected to the battery management unit 1211. The battery management unit 1211 can control the driving circuit 1251a to work, so that the transformer 1251b works.

[0072] The two output ends of the driving circuit 1251a are respectively connected to the two input ends of the transformer 1251b, and the two output ends of the transformer 1251b can be respectively connected to the two input ends of the voltage stabilizing unit 1252. In addition, the circuit between the transformer 1251b and the voltage stabilizing unit 1252 can also be grounded.

[0073] The output end of the voltage stabilizing unit 1252 can be connected to the battery management unit 1211 to transmit the transformed voltage to the battery management unit 1211. At this point, the preset battery unit 1221 in the battery pack 12 can supply power to the battery management unit 1211.

[0074] At this time, a competitive power supply can be formed between the low-voltage power supply 10 and the preset battery unit 1221 to achieve redundant power supply.

[0075] It is understandable that the battery pack 12 may also be in other forms, not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of the battery pack 12. The battery pack 12 may include 75kwh, 100kwh, 90kwh, 115kwh, 80kwh, 60kwh, 150kwh and other types of battery packs.

[0076] Based on the same inventive concept, please refer to Figure 4 and Figure 5 In one embodiment, a power supply method is provided, which is applied to the battery pack 12. The power supply method includes:

[0077] Step S20 : ​​when the low-voltage power supply 10 supplies power to the low-voltage device 11 , detecting a state in which the low-voltage power supply 10 supplies power to the low-voltage device 11 .

[0078] Step S30 : when it is detected that the power supply state is abnormal, power is supplied to the low-voltage device 11 through the second output terminal 121 .

[0079] In step S20, the battery management unit 1211 can detect whether the low voltage power source 10 normally supplies power to the low voltage device 11. Of course, the vehicle power supply system 10 can also be provided with a detection module to detect whether the low voltage power source 10 normally supplies power to the low voltage device 11.

[0080] In step S30 , when the power supply state of the low-voltage device 11 is abnormal, the preset battery unit 1221 is controlled to supply power to the low-voltage device 11 through the second output terminal 121 .

[0081] Of course, at this time, the switch 123 can be turned on by the control module 124, so that the preset battery unit 1221 supplies power to the second output terminal 121. At the same time, after the normal operation of the vehicle is completed, the vehicle control system requests to shut down, the control module 124 can disconnect the switch 123, and the battery management unit 1211 can also stop the battery module 122 from working.

[0082] In the related art, only the low voltage power source 10 supplies power to the low voltage device 11. When the power supply state of the low voltage power source 10 is abnormal, the battery pack 12 cannot output voltage to the vehicle or other equipment, causing the vehicle or other equipment to fail to work.

[0083] In this embodiment, a preset battery unit 1221 is set in the battery module 122. When the low-voltage power supply 10 abnormally supplies power to the low-voltage device 11, the preset battery unit 1221 is used to supply power to the low-voltage device 11 through the second output terminal 121, so that the battery module 122 can provide high-voltage power through the first output terminal 120, thereby enabling the vehicle and other equipment to operate normally.

[0084] Of course, before step S20, it includes:

[0085] Step S10 : supplying power to the high-voltage device 13 through the first output terminal 120 .

[0086] As an example, the battery pack 12 may be controlled to supply high voltage power to the vehicle through the first output terminal 120. At this time, the supply voltage range of the battery pack 12 may be 400V-800V.

[0087] In one embodiment, the circuit through which the low-voltage power supply 10 supplies power to the low-voltage device 11 is a first power supply circuit, and the circuit through which the preset battery unit 1221 supplies power to the low-voltage device 11 is a second power supply circuit.

[0088] When the first power supply circuit is turned on, the second power supply circuit is also turned on. It can be understood that the low-voltage power supply 10 can compete with the preset battery unit 1221 to supply power to the low-voltage device 11 .

[0089] As an example, it can be determined that either the low-voltage power supply 10 or the preset battery unit 1221 supplies power to the low-voltage device 11 according to the status of the low-voltage power supply 10 and the preset battery unit 1221. Alternatively, in another example, it can be determined that either the low-voltage power supply 10 or the preset battery unit 1221 supplies power to the low-voltage device 11 according to the status of the vehicle power supply system.

[0090] In this embodiment, the first power supply circuit and the second power supply circuit are both turned on. At this time, the low-voltage power supply 10 can compete with the preset battery unit 1221 to supply power to the low-voltage device 11, thereby improving the stability of the vehicle power supply system. When any power supply circuit fails, the other power supply circuit can supply power to the low-voltage device 11 to keep the battery pack 12 working.

[0091] In one embodiment, see Figure 4 and Figure 5 , step S20, comprising:

[0092] Step S21: receiving a detection instruction of the power supply status of the low-voltage device 11.

[0093] Step S22: Based on the detection instruction, detect the state of the low-voltage power supply 10 supplying power to the low-voltage device 11.

[0094] In step S21, after the vehicle control system is started, the vehicle control system sends a detection instruction to the control module 124 (e.g., the battery management unit 1211). The vehicle control system and the control module 124 can communicate with each other in a wired or wireless manner, and the wireless manner can be achieved through WIFI, near field communication or other technologies.

[0095] In step S22 , the control module 124 (such as the battery management unit 1211 ) may detect whether the low-voltage power source 10 supplies power to the low-voltage device 11 normally.

[0096] When the battery pack 12 needs to be replaced, the battery pack 12 is removed from the vehicle system. At this time, the battery pack 12 is disconnected from the low-voltage power supply 10, and the battery pack 12 exists independently. In one embodiment, the power supply method further includes:

[0097] Step S100: receiving an instruction to replace the battery pack 12 .

[0098] Step S200 : in response to the instruction, supply power to the low-voltage device 11 through the second output terminal 121 .

[0099] In step S100, after the vehicle control system is started, the vehicle system sends an instruction to replace the battery pack 12 to the battery management unit 1211. The control module 124 (such as the battery management unit 1211) can receive the information of replacing the battery pack 12.

[0100] In step S200 , the control module 124 may control the switch 123 to be turned on, so that the preset battery unit 1221 provides low-voltage power to the low-voltage device 11 through the second output terminal 121 .

[0101] Since the battery pack 12 is disconnected from the low-voltage device 11 in the single-pack state and the battery pack 12 exists independently, only the preset battery unit 1221 can be used to provide power to the low-voltage device 11, so that the low-voltage device 11 and the battery pack 12 can work normally.

[0102] Of course, when the battery pack 12 does not need to work, the control module 124 (such as the battery management unit 1211) can request to shut down, and the control module 124 controls the switch 123 to disconnect, so that the preset battery unit 1221 no longer provides low-voltage power to the second output terminal 121. This embodiment enables the control module 124 (such as the battery management unit 1211) to perform safety monitoring and cell balancing on the battery pack 12 in a single-pack scenario.

[0103] Those skilled in the art should know that the power supply method can be logically controlled using software.

[0104] It should be understood that although Figure 4 and Figure 6 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 4 and Figure 6At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0105] Based on the same inventive concept, in one embodiment, please refer to Figure 7 , a power supply device is provided, including a detection subunit and a control subunit.

[0106] It can be understood that the power supply device may be, but is not limited to, a control module 124 , and the control module 124 may include, but is not limited to, a battery management unit 1211 .

[0107] The detection subunit is used to detect a state in which the low-voltage power supply 10 supplies power to the low-voltage device 11 when the low-voltage power supply 10 supplies power to the low-voltage device 11 .

[0108] The control subunit is used to supply power to the low-voltage device 11 through the second output terminal 121 when an abnormal power supply state is detected.

[0109] In one embodiment, the control subunit may also be configured to supply power to the high voltage device 13 via the first output terminal 120 .

[0110] In addition, the detection subunit may also be used to receive a detection instruction for the power supply status of the low-voltage device 11 , and based on the detection instruction, detect the status of the low-voltage power supply 10 supplying power to the low-voltage device 11 .

[0111] In one embodiment, the control subunit may also be configured to simultaneously conduct the first power supply loop and the second power supply loop.

[0112] The circuit through which the low-voltage power supply 10 supplies power to the low-voltage device 11 is the first power supply circuit, and the circuit through which the preset battery unit 1221 supplies power to the low-voltage device 11 is the second power supply circuit.

[0113] For the specific definition of the power supply device, please refer to the definition of the power supply method above, which will not be repeated here. Each module in the above power supply device can be implemented in whole or in part by software, hardware and a combination thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0114] In one embodiment, a computer device is provided, which includes a memory and a processor. The computer device may be a terminal. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. When the computer program is executed by the processor, the above-mentioned power supply method is implemented.

[0115] The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a key, trackball or touchpad provided on the computer device housing, or an external keyboard, touchpad or mouse.

[0116] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned embodiments are implemented.

[0117] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0118] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0119] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A battery pack, characterized in that: The battery pack comprises: a battery module, a first output terminal and a second output terminal; The battery module is electrically connected to the first output end, and the first output end is used to supply power to the high-voltage device; The battery module includes a preset battery unit, the preset battery unit is electrically connected to the second output end, and the second output end is used to supply power to the low-voltage device.

2. The battery pack according to claim 1, characterized in that: The battery pack further comprises: a switch, wherein a first end of the switch is electrically connected to the preset battery unit, and a second end of the switch is electrically connected to the second output end; When the switch is closed, the preset battery unit is connected to the second output terminal; When the switch is turned off, the preset battery unit is disconnected from the second output terminal.

3. The battery pack according to claim 2, characterized in that: The battery pack further comprises: A control module is connected to the control end of the switch, and is used to control the switch to be closed or opened.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The battery pack further includes a voltage conversion module, and the voltage conversion module connects the preset battery unit and the second output end.

5. The battery pack according to claim 4, characterized in that: The voltage conversion module includes: a transformer unit and a voltage stabilizing unit. The transformer unit is connected to the preset battery unit and is used to transform the voltage of the preset battery unit. The two ends of the voltage stabilizing unit are respectively connected to the transformer unit and the second output end, and are used to stabilize the voltage output by the transformer unit and output it to the second output end. The transformer unit includes a drive circuit and a transformer. The drive circuit is connected to the transformer and the preset battery unit and is used to drive the transformer to perform voltage conversion. The transformer is connected to the drive circuit and the second output end.

6. A power supply method, applied to the battery pack according to any one of claims 1 to 5, characterized in that: The method comprises: When the low-voltage device is supplied with power by the low-voltage power supply, detecting a state in which the low-voltage power supply supplies power to the low-voltage device; When an abnormal power supply state is detected, power is supplied to the low-voltage device through the second output terminal.

7. The power supply method according to claim 6, characterized in that: The method further comprises: A first power supply circuit for the low-voltage power supply to supply power to the low-voltage device and a second power supply circuit for the preset battery unit to supply power to the low-voltage device are conducted.

8. The power supply method according to claim 6, characterized in that: The method further comprises: receiving an instruction to replace the battery pack; In response to the instruction, power is supplied to the low-voltage device through the second output terminal.

9. A power supply device, characterized in that: The device comprises: A detection subunit, used for detecting a state in which the low-voltage power supply supplies power to the low-voltage device when the low-voltage power supply supplies power to the low-voltage device; The control subunit is used to supply power to the low-voltage device through the second output terminal when an abnormal power supply state is detected.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 6 to 8 are implemented.

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