CN118739181A - Battery undervoltage control method, device, electronic equipment, medium and product - Google Patents

Abstract

The present application discloses a battery undervoltage control method, device, electronic device, medium and product. The battery undervoltage control method comprises: obtaining the battery temperature and the undervoltage protection value of a single battery; controlling the undervoltage protection value of the single battery according to the battery temperature, wherein the undervoltage protection value of the single battery decreases by a first set value for each decrease in the battery temperature by a set number of degrees. The above technical solution can reduce the undervoltage protection value accordingly when the battery temperature decreases, delay the undervoltage protection in a low temperature environment, increase the battery discharge, achieve full battery discharge, and improve battery performance.

Description

Battery undervoltage control method, device, electronic equipment, medium and product

Technical Field

The embodiments of the present application relate to the field of battery management technology, and in particular to a battery undervoltage control method, device, electronic device, medium and product.

Background Art

The discharge speed of batteries, especially lithium batteries, will slow down in low temperature environments, and excessive discharge will cause undervoltage problems. When the battery voltage is lower than the normal working voltage, that is, the battery is undervoltage, the voltage protection is activated. The battery cannot continue to discharge before the problem is solved, causing the connected electric vehicle to be unable to drive normally or run unstably. Electric vehicles, especially lithium-ion vehicles, have a short range in winter. The main reason is that the battery capacity is greatly affected by temperature. The discharge at low temperature is 85% of that at normal temperature, and undervoltage problems are prone to occur. Since the battery cannot be fully discharged, it affects the user's travel. How to make the battery fully discharged in a low temperature environment has become an urgent problem to be solved.

Summary of the invention

The present application provides a battery undervoltage control method, device, electronic device, medium and product to achieve full discharge of the battery and improve battery performance.

In a first aspect, an embodiment of the present application provides a battery undervoltage control method, comprising:

Get the battery temperature and the undervoltage protection value of a single battery;

The undervoltage protection value of the single battery is controlled according to the battery temperature, wherein the undervoltage protection value of the single battery is correspondingly reduced by a first set value each time the battery temperature decreases by a set number of degrees.

In a second aspect, an embodiment of the present application further provides a battery undervoltage control device, comprising:

The acquisition module is used to obtain the battery temperature and the undervoltage protection value of a single battery;

The control module is used to control the undervoltage protection value of the single battery according to the battery temperature, wherein the undervoltage protection value of the single battery decreases by a first set value each time the battery temperature decreases by a set degree.

In a third aspect, an embodiment of the present application provides an electronic device, including:

one or more processors;

A storage device for storing one or more programs;

When the one or more programs are executed by the one or more processors, the one or more processors implement the battery undervoltage control method as described in the first aspect.

In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the battery undervoltage control method as described in the first aspect.

In a fifth aspect, an embodiment of the present application further provides a computer program product, including a computer program and/or instructions, which, when executed by a processor, implements the battery undervoltage control method as described in the first aspect.

The embodiments of the present application provide a battery undervoltage control method, device, electronic device, medium and product. The battery undervoltage control method includes: obtaining the current terminal current, full-charge capacity and current number of cycles; determining corresponding status values according to the current terminal current, the full-charge capacity and the current number of cycles respectively; determining the current battery health status value according to the weighted average of each of the status values. The above technical scheme evaluates the battery health status by considering the current current, capacity and number of charging cycles of the battery respectively, and then comprehensively determines the current battery health status value according to the status values of various aspects, thereby improving the reliability of the battery health status and facilitating users to understand the battery health status and use the battery reasonably.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

FIG1 is a flow chart of a battery undervoltage control method provided by an embodiment of the present application;

FIG2 is a schematic diagram of the structure of a battery undervoltage control device provided in an embodiment of the present application;

FIG3 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

DETAILED DESCRIPTION

The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only the parts related to the present application, rather than all structures, are shown in the accompanying drawings.

It should be mentioned before discussing the exemplary embodiments in more detail that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the steps as sequential processes, many of the steps therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of the steps can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

It should be noted that the concepts such as "first" and "second" mentioned in the embodiments of the present application are only used to distinguish different devices, modules, units or other objects, and are not used to limit the order or interdependence of the functions performed by these devices, modules, units or other objects.

In addition, the embodiments in the present application and the features in the embodiments may be combined with each other if there is no conflict.

The acquisition, storage, use, and processing of data in the technical solution of this application comply with the relevant provisions of national laws and regulations.

It should be noted that in the embodiments of the present application, some existing solutions in the industry such as certain software, components, models, etc. may be mentioned, which should be regarded as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of the present application, but it does not mean that the applicant has or will necessarily use the relevant content of the solution.

FIG1 is a flow chart of a battery undervoltage control method provided in an embodiment of the present application. This embodiment is applicable to the case where a battery undervoltage condition is to be controlled, and the battery is a storage battery, and its discharge is affected by temperature, for example, it may be a lithium battery. Specifically, the battery undervoltage control method may be executed by a battery undervoltage control device, and the battery undervoltage control device may be implemented by software and/or hardware and integrated in an electronic device. Electronic devices include, but are not limited to, computers, smart phones, electronic controllers (Electronic Control Unit, ECU), vehicle-mounted chips or servers and other devices with computing functions.

As shown in FIG1 , the method specifically comprises the following steps:

S110: Obtain battery temperature and an undervoltage protection value of a single battery.

Specifically, the battery temperature mainly refers to the internal temperature of the battery. The electronic device can communicate with the battery to obtain the battery temperature, or it can be obtained with the help of a temperature sensor. The undervoltage protection value of a single battery cell, which can also be called the minimum voltage of a single battery cell, can be determined based on the rated voltage. For example, each battery cell has a rated voltage. In actual operation, it cannot be fully guaranteed that the battery can operate at the rated voltage. It usually operates in a range near the rated voltage, such as ±15% of the rated voltage. If the operating voltage is lower than the rated voltage by -15%, it is in an undervoltage state and will trigger undervoltage protection. The undervoltage protection value is usually pre-set and is applicable to the normal temperature range. For example, in an environment of +5°C to +40°C, the undervoltage protection value of a single battery cell is 2.75V.

S120, controlling the undervoltage protection value of the single battery cell according to the battery temperature, wherein the undervoltage protection value of the single battery cell decreases by a first set value each time the battery temperature decreases by a set number of degrees.

Specifically, if the current battery temperature is within the normal temperature range (such as +5°C to +40°C), the undervoltage protection value of a single battery is a default value or a preset value (such as 2.75V). Every time the battery temperature drops by a set number of degrees, the undervoltage protection value of a single battery drops by a first set value. For example, the undervoltage protection value of a single battery can be reduced by 0.03V for every 1°C drop in battery temperature compared to +5°C. For low temperature environments, the battery temperature ranges from +5°C to -10°C, and accordingly, the undervoltage protection value of a single battery ranges from 2.75V to 2.3V. Exemplarily, the battery is a 48V24AH lithium battery with 13 series and 1 parallel.

A battery undervoltage control method provided in an embodiment of the present application controls an undervoltage protection value according to the battery temperature. When the battery temperature decreases, the undervoltage protection value can be reduced accordingly, thereby delaying the undervoltage protection in a low temperature environment, increasing the battery discharge amount, achieving full battery discharge, and improving battery performance.

In one embodiment, the method further comprises:

S130 , controlling a total undervoltage protection value of the multiple batteries according to the battery temperature, wherein the battery temperature is positively correlated with the total undervoltage protection value of the multiple batteries.

Specifically, if the current battery temperature is within the normal temperature range (such as +5°C to +40°C), the total undervoltage protection value of multiple batteries (such as 13 in series and 1 in parallel, a total of 14 batteries) may be a default value or a preset value (such as 40V). As the battery temperature decreases, the total undervoltage protection value of the multiple batteries also decreases accordingly. For example, for every 1°C drop in battery temperature, the total undervoltage protection value of the multiple batteries decreases by a first set value accordingly. For example, for every 1°C drop in battery temperature compared to +5°C, the total undervoltage protection value of the multiple batteries may be reduced by 0.6V. As the battery temperature decreases, the total undervoltage protection value of the multiple batteries may range from 40V to 30V.

In one embodiment, the method further comprises:

S140, controlling the current output in the case of battery under-voltage according to the total under-voltage protection value, wherein the current output correspondingly increases by a third set value each time the total under-voltage protection value decreases by a second set value.

Specifically, if the total undervoltage protection value of multiple batteries (such as 13 in series and 1 in parallel, a total of 14 batteries) is the default value or preset value (such as 40V), the current output is the lowest value such as 10%; as the battery temperature and the total undervoltage protection value decrease, the current output can increase. For example, for every 1V decrease in the total undervoltage protection value, the current output increases by 6%. When the total undervoltage protection value decreases to 30V, the current output increases to 100%, so that the battery can be fully discharged in a low temperature environment and under voltage conditions.

In one embodiment, the method further comprises:

S150, when the total undervoltage protection value drops to the minimum value, the current output is stopped. For example, when the total undervoltage protection value drops to 30V, the current output may be stopped.

In one embodiment, the method further comprises:

S160, obtaining a driving mode set for a battery-powered vehicle through application software;

S170: When the driving mode is a designated mode and the battery is under-voltage, control the vehicle to increase its driving speed.

Specifically, the electronic device can be connected to the APP via Bluetooth, and the user can set the vehicle's driving mode in the APP. If the driving mode is normal mode, undervoltage control is performed according to the default value or preset value of the undervoltage protection, and the undervoltage protection value will not be adjusted or the vehicle will not be accelerated; if the driving mode is a specified mode, such as a secondary undervoltage mode or a low-power riding mode, the undervoltage protection value of a single battery, the total undervoltage protection value of multiple batteries and the current output can be adjusted according to the battery temperature; and when the battery is undervoltage, the vehicle can be controlled to accelerate to fully discharge the battery.

In one embodiment, the method further comprises:

S180: Setting a switch state, wherein the switch state is used to indicate whether to control the undervoltage protection value of the single battery according to the battery temperature.

Specifically, the electronic device can set the switch state and communicate with the battery, and determine whether to control the undervoltage protection value of a single battery cell according to the battery temperature through the switch state. In addition, it can also determine whether to control the total undervoltage protection value and current output of multiple batteries according to the battery temperature based on the switch state.

A battery undervoltage control method provided in an embodiment of the present application can adjust the undervoltage protection value of a single battery, the total undervoltage protection value of multiple batteries, and the current output according to the battery temperature; and when the battery is undervoltage, the vehicle speed can be controlled to fully discharge the battery; in addition, the user can set whether to enable the speed-up function through the APP, and the electronic device can also set whether to perform undervoltage control according to the battery temperature through the switch state, which improves the flexibility of undervoltage control and can meet different actual needs.

FIG2 is a schematic diagram of the structure of a battery undervoltage control device provided in an embodiment of the present application. The battery undervoltage control device provided in this embodiment includes:

An acquisition module 210 is used to acquire the battery temperature and the undervoltage protection value of a single battery;

The control module 220 is used to control the undervoltage protection value of the single battery according to the battery temperature, wherein the undervoltage protection value of the single battery is correspondingly reduced by a first set value every time the battery temperature drops by a set degree.

The device can reduce the undervoltage protection value accordingly when the battery temperature decreases, delay the undervoltage protection in a low temperature environment, increase the battery discharge amount, achieve full battery discharge, and improve battery performance.

Optionally, the control module 220 is further configured to: control a total under-voltage protection value of the multiple batteries according to the battery temperature, wherein the battery temperature is positively correlated with the total under-voltage protection value of the multiple batteries.

Optionally, the control module 220 is further used to: control the current output in the case of battery under-voltage according to the total under-voltage protection value, wherein every time the total under-voltage protection value decreases by a second set value, the current output correspondingly increases by a third set value.

Optionally, the control module 220 is further configured to: stop current output when the total undervoltage protection value drops to a minimum value.

Optionally, the device further comprises:

a mode determination module for acquiring a driving mode set for a vehicle using a battery through application software;

The speed-up module is used to control the vehicle to increase its driving speed when the driving mode is a specified mode and the battery is under-voltage.

Optionally, the device further comprises:

The enabling module is configured to set a switch state, wherein the switch state is used to indicate that an undervoltage protection value of the single battery is controlled according to the battery temperature.

The battery undervoltage control device provided in the embodiment of the present application can be used to execute the battery undervoltage control method provided in any of the above embodiments, and has corresponding functions and beneficial effects.

Fig. 3 shows a block diagram of an electronic device 10 that can be used to implement an embodiment of the present application. The electronic device 10 is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device 10 can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, user equipment, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples, and are not intended to limit the implementation of the present application described herein and/or required.

As shown in FIG3 , the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11 in communication, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to the bus 14.

Multiple components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices through a computer network such as the Internet and/or various telecommunication networks, wireless networks.

The processor 11 may be a variety of general and/or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above.

In some embodiments, the method of the above embodiment may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed on the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform any of the above embodiment methods in any other appropriate manner (e.g., by means of firmware).

Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and/or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

The computer programs for implementing the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer programs are executed by the processor, the functions/operations specified in the flow charts and/or block diagrams are implemented. The computer programs may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

In the context of the present application, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, device, or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device 10 having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device 10. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

An embodiment of the present application further provides a computer program product, including a computer program and/or instructions, which, when executed by a processor, implements the battery undervoltage control method as described in any of the above embodiments.

It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution of this application can be achieved, and this document is not limited here.

The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims (10)

1. A battery undervoltage control method, comprising: Get the battery temperature and the undervoltage protection value of a single battery; The undervoltage protection value of the single battery is controlled according to the battery temperature, wherein the undervoltage protection value of the single battery is correspondingly reduced by a first set value each time the battery temperature decreases by a set number of degrees. 2. The method according to claim 1, further comprising: The total undervoltage protection value of the multiple batteries is controlled according to the battery temperature, and the battery temperature is positively correlated with the total undervoltage protection value of the multiple batteries. 3. The method according to claim 2, further comprising: The current output in the case of battery under-voltage is controlled according to the total under-voltage protection value, wherein the current output correspondingly increases by a third set value each time the total under-voltage protection value decreases by a second set value. 4. The method according to claim 3, further comprising: When the total undervoltage protection value drops to a minimum value, the current output is stopped. 5. The method according to any one of claims 1 to 4, further comprising: Get the driving mode set for the battery-powered vehicle through the application software; When the driving mode is a designated mode and the battery voltage is low, the driving speed of the vehicle is controlled to increase. 6. The method according to any one of claims 1 to 4, further comprising: A switch state is set, where the switch state is used to indicate whether to control the undervoltage protection value of the single battery according to the battery temperature. 7. A battery undervoltage control device, comprising: The acquisition module is used to obtain the battery temperature and the undervoltage protection value of a single battery; The control module is used to control the undervoltage protection value of the single battery according to the battery temperature, wherein the undervoltage protection value of the single battery decreases by a first set value each time the battery temperature decreases by a set degree. 8. An electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the battery undervoltage control method as described in any one of claims 1-6. 9. A computer-readable storage medium having a computer program stored thereon, wherein when the program is executed by a processor, the battery undervoltage control method according to any one of claims 1 to 6 is implemented. 10. A computer program product, comprising a computer program and/or instructions, wherein when the computer program and/or instructions are executed by a processor, the battery undervoltage control method according to any one of claims 1 to 6 is implemented.