CN117783896A

CN117783896A - Battery testing method and device, nonvolatile storage medium and computer equipment

Info

Publication number: CN117783896A
Application number: CN202311624620.8A
Authority: CN
Inventors: 杨慧; 厉运杰; 徐庆庆; 程世骑; 杨思文
Original assignee: Gotion High Tech Co Ltd
Current assignee: Gotion High Tech Co Ltd
Priority date: 2023-11-27
Filing date: 2023-11-27
Publication date: 2024-03-29

Abstract

The invention discloses a battery testing method, a battery testing device, a nonvolatile storage medium and computer equipment. Wherein the method comprises the following steps: acquiring historical working state data of a vehicle battery, wherein the vehicle battery is positioned in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs; according to the historical working state data, determining respective corresponding test parameter values of a plurality of battery state of charge (SOC) intervals, wherein the test parameter values are used for simulating respective corresponding working states of a vehicle battery in the plurality of SOC intervals; and respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals according to the test parameter values to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery. The invention solves the technical problem that the set test parameters cannot truly simulate the working state of the vehicle battery when the market vehicle runs when the power battery in the vehicle is tested in the prior art.

Description

Battery testing method and device, nonvolatile storage medium and computer equipment

Technical Field

The present invention relates to the field of battery testing, and in particular, to a battery testing method and apparatus, a nonvolatile storage medium, and a computer device.

Background

The lithium ion battery is widely used in various fields because of high energy density, no memory effect and long cycle life, the performance of the lithium ion battery is generally divided into two categories of electrical performance and reliability, and the life is one of important indexes for measuring the performance of the lithium ion battery.

In the prior art, national standard test standard GB/T31484-2015 is generally adopted to test the standard cycle life of the lithium battery, the specific test method is 1C (constant current constant voltage charge)/1C (constant current discharge), the test period is longer, but the charge and discharge strategy of the whole battery pack is generally constant current charge of ladder current and small current, the battery is in a constraint state in the whole pack, the test parameters set in the prior art are free from the running condition of a vehicle at the market end as a reference, and the battery cannot be close to the real running state of the vehicle at the market end when tested.

In view of the above problems, no effective solution has been proposed at present.

Disclosure of Invention

The embodiment of the invention provides a battery testing method, a device, a nonvolatile storage medium and computer equipment, which at least solve the technical problem that set testing parameters cannot truly simulate the working state of a vehicle battery when a market vehicle runs when a power battery in the vehicle is tested in the prior art.

According to an aspect of an embodiment of the present invention, there is provided a battery testing method including: optionally, acquiring historical working state data of the vehicle battery, wherein the vehicle battery is located in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs; according to the historical working state data, determining test parameter values corresponding to each of a plurality of battery state of charge (SOC) intervals, wherein the test parameter values are used for simulating the working states of the vehicle battery corresponding to each of the plurality of SOC intervals; and respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals according to the test parameter values to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery.

Optionally, according to the test parameter values, respectively performing a cyclic test on the battery to be tested in a plurality of SOC intervals, including: for any of the plurality of SOC intervals, the following test steps are performed: determining an upper interval limit and a lower interval limit corresponding to a target SOC interval in the plurality of SOC intervals, wherein the target SOC interval is any interval in the plurality of SOC intervals; and carrying out target cycle test on the battery to be tested in the target SOC interval according to the test parameter value, wherein any one cycle test in the target cycle test comprises the following steps: and charging the battery to be tested to the upper limit of the interval, and discharging the battery to be tested to the lower limit of the interval.

Optionally, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: determining target historical data corresponding to a target SOC interval in the historical operating state data, wherein the target historical data represents the operating state of the vehicle battery in the target SOC interval; and determining a target parameter value corresponding to the target SOC interval according to the target historical data, wherein the test parameter value comprises the target parameter value.

Optionally, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: according to the historical working state data, determining a first using time length of the vehicle battery in a target SOC interval and determining a second using time length of the vehicle battery, wherein the second using time length is the total using time length of the vehicle battery in a plurality of SOC intervals; determining a first use time length proportion corresponding to the target SOC interval according to the first use time length and the second use time length; and determining a target cycle number corresponding to the target SOC interval according to the first use time-length ratio and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

Optionally, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: according to the historical working state data, determining first charge and discharge times of triggering charge and discharge of the vehicle battery in a target SOC (state of charge) interval and determining second charge and discharge times of the vehicle battery, wherein the second charge and discharge times are total charge and discharge times of triggering charge and discharge of the vehicle battery in a plurality of SOC intervals; determining a first charge-discharge frequency proportion corresponding to the target SOC interval according to the first charge-discharge frequency and the second charge-discharge frequency; and determining a target cycle number corresponding to the target SOC interval according to the first charge-discharge frequency proportion and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

Optionally, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining a third using time length corresponding to each of the plurality of charge-discharge multiplying factors; determining a first use duration of the vehicle battery in the target SOC interval according to the historical working state data; determining a second use time length proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third use time length and the first use time length; and determining a target charge-discharge current corresponding to the target SOC interval according to the second use time length ratio and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current.

Optionally, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining third charge-discharge times corresponding to the plurality of charge-discharge multiplying factors; determining the second charge and discharge times of the vehicle battery in the target SOC interval according to the historical working state data; determining a second charge-discharge frequency proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third charge-discharge frequency and the second charge-discharge frequency; and determining a target charge-discharge current corresponding to the target SOC interval according to the second charge-discharge frequency proportion and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current.

According to another aspect of the embodiment of the present invention, there is also provided a battery test apparatus including: the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring historical working state data of a vehicle battery, the vehicle battery is positioned in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs; the first determining module is used for determining test parameter values corresponding to each of a plurality of battery state of charge (SOC) intervals according to historical working state data, wherein the test parameter values are used for simulating the working states of the vehicle battery corresponding to each of the plurality of SOC intervals; and the second determining module is used for respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals according to the test parameter values to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery.

According to still another aspect of the embodiment of the present invention, there is further provided a nonvolatile storage medium, where the nonvolatile storage medium includes a stored program, and when the program runs, the device in which the nonvolatile storage medium is controlled to execute any one of the battery testing methods described above.

According to still another aspect of the embodiment of the present invention, there is further provided a computer device, including a memory for storing a program and a processor for running the program stored in the memory, where the program executes any one of the battery testing methods described above when running.

In the embodiment of the invention, the historical working state data of the vehicle battery is obtained, wherein the vehicle battery is positioned in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs; then, according to the historical working state data, determining test parameter values corresponding to each of a plurality of battery state of charge (SOC) intervals, wherein the test parameter values are used for simulating the working states of the vehicle battery corresponding to each of the plurality of SOC intervals; according to the test parameter values, respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery, so that the purpose that the set test parameters can simulate the working state of the vehicle battery when the market vehicle runs when the vehicle battery is tested is achieved, the technical effects of improving the authenticity and reliability of the vehicle battery test process are achieved, and the technical problem that the set test parameters cannot truly simulate the working state of the vehicle battery when the market vehicle runs when the power battery in the vehicle is tested in the prior art is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 shows a hardware block diagram of a computer terminal for implementing a battery test method;

fig. 2 is a flow chart of a battery testing method according to an embodiment of the present invention;

FIG. 3 is a flow chart of a battery testing method provided in accordance with an alternative embodiment of the present invention;

FIG. 4 is a schematic illustration of a plurality of SOC interval usage duty cycles distribution while a market vehicle is in operation, provided in accordance with an alternative embodiment of the present invention;

FIG. 5 is a schematic diagram of a plurality of charge-discharge rate distributions within a certain SOC interval when a market vehicle is running according to an alternative embodiment of the present invention;

fig. 6 is a block diagram of a battery testing apparatus according to an embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In accordance with an embodiment of the present invention, there is provided a method embodiment of battery testing, it being noted that the steps shown in the flowchart of the figures may be performed in a computer system, such as a set of computer executable instructions, and, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order other than that shown or described herein.

The method embodiments provided by the embodiments of the present application may be performed in a mobile terminal, a computer terminal, or similar computing device. Fig. 1 shows a hardware block diagram of a computer terminal for implementing a battery test method. As shown in fig. 1, the computer terminal 10 may include one or more (shown as processor 102a, processor 102b, … …, processor 102 n) processors (which may include, but are not limited to, a microprocessor MCU or a processing device such as a programmable logic device FPGA) and a memory 104 for storing data. In addition, the method may further include: a display, an input/output interface (I/O interface), a Universal Serial BUS (USB) port (which may be included as one of the ports of the BUS), a network interface, a power supply, and/or a camera. It will be appreciated by those of ordinary skill in the art that the configuration shown in fig. 1 is merely illustrative and is not intended to limit the configuration of the electronic device described above. For example, the computer terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.

It should be noted that the one or more processors and/or other data processing circuits described above may be referred to herein generally as "data processing circuits. The data processing circuit may be embodied in whole or in part in software, hardware, firmware, or any other combination. Furthermore, the data processing circuitry may be a single stand-alone processing module or incorporated, in whole or in part, into any of the other elements in the computer terminal 10. As referred to in the embodiments of the present application, the data processing circuit acts as a processor control (e.g., selection of the path of the variable resistor termination to interface).

The memory 104 may be used to store software programs and modules of application software, such as program instructions/data storage devices corresponding to the battery testing method in the embodiments of the present invention, and the processor executes the software programs and modules stored in the memory 104, thereby executing various functional applications and data processing, that is, implementing the battery testing method of the application program. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor, which may be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The display may be, for example, a touch screen type Liquid Crystal Display (LCD) that may enable a user to interact with a user interface of the computer terminal 10.

Fig. 2 is a flow chart of a battery testing method according to an embodiment of the invention, as shown in fig. 2, the method includes the following steps:

Step S202, historical working state data of a vehicle battery is obtained, wherein the vehicle battery is located in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs.

The vehicle battery in this step may be any vehicle battery in the types of electric vehicles at market end, hybrid electric vehicles, pure electric buses, and the like. Alternatively, the historical operating state data may include a plurality of types of data related to the operating state of the vehicle battery, for example, may include at least one of the following data types: the total use time of a vehicle battery in a market-end vehicle in a battery state of charge (SOC) is long, the use time of the vehicle battery in one of the SOC intervals, the total charge and discharge times of the vehicle battery in a plurality of SOC intervals, the charge and discharge times of the vehicle battery in one of the SOC intervals, the plurality of charge and discharge multiplying factors adopted when the vehicle battery is charged and discharged in one of the SOC intervals, the use time of the plurality of charge and discharge multiplying factors, and the charge and discharge times of the plurality of charge and discharge multiplying factors.

Alternatively, the historical operating state data of the vehicle battery may be obtained by at least one of: from the vehicle battery management system, modern vehicles are equipped with a Battery Management System (BMS) that can record and store battery operating state data. By connecting to the BMS, historical operating state data of the battery, such as voltage, current, temperature, etc., of the battery can be acquired. Alternatively, the historical operating state data of the vehicle battery can be obtained by a vehicle diagnostic apparatus, a professional vehicle diagnostic apparatus can be connected to an OBD (On-board Diagnostics) interface of the vehicle, and the operating state data of the battery can be read, and the historical operating state data of the battery can be recorded and stored by a data recording function of the diagnostic apparatus. By acquiring historical working data of the vehicle battery, a data basis is provided for battery test parameter set values for simulating the working state of the vehicle battery when the market-end vehicle is in operation after battery test.

Step S204, according to the historical working state data, determining test parameter values corresponding to each of a plurality of battery state of charge (SOC) intervals, wherein the test parameter values are used for simulating the working states of the vehicle battery corresponding to each of the plurality of SOC intervals.

As an alternative embodiment, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: determining target historical data corresponding to a target SOC interval in the historical operating state data, wherein the target historical data represents the operating state of the vehicle battery in the target SOC interval; and determining a target parameter value corresponding to the target SOC interval according to the target historical data, wherein the test parameter value comprises the target parameter value.

Optionally, the target historical data may be a target charge-discharge frequency triggered by the market-end vehicle in the target SOC interval, where the target charge-discharge frequency represents a charge-discharge state of the vehicle battery in the target SOC interval, and the reference value of the test cycle number under the target SOC interval is determined according to the target charge-discharge frequency. The historical data of the target SOC interval is obtained to determine the target parameter value corresponding to the target SOC interval, so that the target parameter value can be ensured to truly simulate the working state of the vehicle battery when the market-end vehicle runs.

As an alternative embodiment, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: according to the historical working state data, determining a first using time length of the vehicle battery in a target SOC interval and determining a second using time length of the vehicle battery, wherein the second using time length is the total using time length of the vehicle battery in a plurality of SOC intervals; determining a first use time length proportion corresponding to the target SOC interval according to the first use time length and the second use time length; and determining a target cycle number corresponding to the target SOC interval according to the first use time-length ratio and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

The first use time length proportion of the target SOC interval in the total use time length of the plurality of SOC intervals is determined, the first use time length proportion is used as the weight of the target SOC interval, the weight is multiplied by the preset battery cycle test cycle number to obtain the target cycle number of the target SOC interval, the target cycle number is determined by using the first use time length proportion, the use time length of other SOC intervals except the target SOC interval is comprehensively considered, and the running state of the vehicle battery in the target SOC interval when the market-end vehicle runs can be comprehensively considered.

As an alternative embodiment, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: according to the historical working state data, determining first charge and discharge times of triggering charge and discharge of the vehicle battery in a target SOC (state of charge) interval and determining second charge and discharge times of the vehicle battery, wherein the second charge and discharge times are total charge and discharge times of triggering charge and discharge of the vehicle battery in a plurality of SOC intervals, and the primary charge and discharge times comprise primary charge and primary discharge; determining a first charge-discharge frequency proportion corresponding to the target SOC interval according to the first charge-discharge frequency and the second charge-discharge frequency; and determining a target cycle number corresponding to the target SOC interval according to the first charge-discharge frequency proportion and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number. The first charge-discharge frequency proportion is multiplied by the preset battery cycle test cycle number to obtain the target cycle number, the first charge-discharge frequency proportion is used as the weight of the target SOC interval, the charge-discharge frequency triggered by other SOC intervals except the target SOC interval is comprehensively considered, and the running state of the vehicle battery in the target SOC interval when the market-end vehicle runs can be more comprehensively considered.

As an alternative embodiment, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining a third using time length corresponding to each of the plurality of charge-discharge multiplying factors; determining a first use duration of the vehicle battery in the target SOC interval according to the historical working state data; determining a second use time length proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third use time length and the first use time length; according to the second usage time length ratio and the plurality of charge and discharge rates, the plurality of charge and discharge rate intervals can take a middle value of interval to determine a target charge and discharge current corresponding to the target SOC interval by multiplying the second usage time length ratio corresponding to each of the plurality of charge and discharge rate intervals in the target SOC interval by the corresponding plurality of charge and discharge rate intervals, for example, when the vehicle battery is operated at 35 degrees or more, the usage ratio of-0.3 to 0 charge and discharge rate interval is 12%, the usage ratio of 0 to 0.3 charge and discharge rate interval is 80%, the usage ratio of 0 to 0.3 charge and discharge rate interval is 5%, the usage ratio of 0.3 to 0.5 charge and discharge rate interval is 2%, and the usage ratio of 1.0 to 1.5 charge and discharge rate interval is 1%, that is, the obtained target charge and discharge current has a size of-0.15x12% +0.15x80% +0.4x5% +0.75x2% +1% + 0.1495 +. Wherein the test parameter value includes a target charge-discharge current. The target charge-discharge current is determined through the second use time-length ratio corresponding to the plurality of charge-discharge multiplying powers and the target charge-discharge multiplying power interval, and the obtained test parameters can be more truly close to the working state of the vehicle battery when the market-end vehicle runs.

As an alternative embodiment, determining test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data includes: according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining third charge-discharge times corresponding to the plurality of charge-discharge multiplying factors; determining the second charge and discharge times of the vehicle battery in the target SOC interval according to the historical working state data; determining a second charge-discharge frequency proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third charge-discharge frequency and the second charge-discharge frequency; and determining a target charge-discharge current corresponding to the target SOC interval according to the second charge-discharge frequency proportion and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current. The method comprises the steps that a second charge-discharge frequency proportion corresponding to each of a plurality of charge-discharge multiplying factors is multiplied by a plurality of charge-discharge multiplying factor intervals corresponding to each of the plurality of charge-discharge multiplying factor intervals in a target SOC interval, wherein the plurality of charge-discharge multiplying factor intervals can take interval intermediate values, and a target charge-discharge current corresponding to the target SOC interval is determined, for example, when a vehicle battery runs at-5 to 5 degrees, under 90% to 100% of the SOC interval, the charge-discharge frequency proportion triggered by the charge-discharge multiplying factor interval is 15%, the charge-discharge frequency proportion triggered by the charge-discharge multiplying factor interval is 68%, the charge-discharge frequency proportion triggered by the charge-discharge multiplying factor interval is 11%, the charge-discharge frequency proportion triggered by the charge-discharge multiplying factor interval is 0.3 to 0.5%, and the charge-discharge frequency proportion triggered by the charge-discharge multiplying factor interval is 1%, namely the magnitude of the obtained target charge-discharge current is: -0.4x15++0.15 x68% +0.15x11 the%+0.4x5% +0.75x1% = -0.118. Wherein the test parameter value includes a target charge-discharge current. The target charge-discharge current is determined through the second charge-discharge frequency proportion corresponding to the plurality of charge-discharge multiplying powers and the target charge-discharge multiplying power interval, and the obtained test parameters can be more truly close to the working state of the vehicle battery when the market-end vehicle runs.

Step S206, respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals according to the test parameter values to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery.

It should be noted that, the battery to be tested in this step may be a lithium battery using LFP or NCM as a positive electrode material, and the battery cell cycle applicability of the type of lithium battery for different material systems is strong. The battery to be tested can be in a 2-5 standard atmospheric pressure environment and under the restraint force of the metal fixture.

As an alternative embodiment, according to the test parameter values, respectively performing cyclic tests on the battery to be tested in a plurality of SOC intervals, including: for any of the plurality of SOC intervals, the following test steps are performed: determining an upper interval limit and a lower interval limit corresponding to a target SOC interval in the plurality of SOC intervals, wherein the target SOC interval is any interval in the plurality of SOC intervals; and carrying out target cycle test on the battery to be tested in the target SOC interval according to the test parameter value, wherein any one cycle test in the target cycle test comprises the following steps: and charging the battery to be tested to the upper limit of the interval, discharging the battery to be tested to the lower limit of the interval, wherein the battery to be tested is charged to the upper limit of the interval, the cut-off voltage is the upper limit voltage of the battery cell, the battery to be tested is discharged to the lower limit of the interval, and the cut-off voltage is the lower limit voltage of the battery cell. In the charging and discharging processes, the temperature difference between the cycle temperature of the battery to be tested and the temperature of the test environment is not more than 15 ℃; after the charging process is finished, the battery to be tested is placed for 2s, and after the discharging process is finished, the battery to be tested is placed for 60s, and the test verification period is shortened by shortening the standing time between one cycle, so that the overall battery test time can be shortened, and the test efficiency in the battery test process is greatly improved.

Through the steps, the purpose that the set test parameters can simulate the working state of the vehicle battery when the vehicle battery in the market runs is achieved when the vehicle battery is tested, so that the technical effects of improving the authenticity and reliability when the vehicle battery is tested are achieved, and the technical problem that the set test parameters cannot truly simulate the working state of the vehicle battery when the vehicle in the market runs when the power battery in the vehicle is tested in the prior art is solved.

Based on the above embodiments and alternative embodiments, the present invention provides specific ways to conduct battery testing as follows.

Fig. 3 is a flow chart of a battery testing method according to an alternative embodiment of the present invention, as shown in fig. 3, the method may include the following steps:

s302: and (5) counting historical working state data of the vehicle battery when the market-end vehicle runs.

Based on historical working state data of vehicle batteries in a certain number of market-end vehicles, counting the number of charge and discharge times triggered by the market-end vehicles in a plurality of SOC intervals and the use ratio of the same SOC intervals in different running temperatures, and taking the charge and discharge times and the use ratio of the same SOC intervals as reference values of stepped cycle numbers in battery tests.

FIG. 4 is a schematic diagram of a distribution of usage duty ratios of a plurality of SOC intervals during operation of a market vehicle according to an alternative embodiment of the present invention, wherein a first usage period of a vehicle battery during a target SOC interval is determined and a second usage period of the vehicle battery is determined according to historical operating state data, wherein the second usage period is a total usage period of the vehicle battery during the plurality of SOC intervals, as shown in FIG. 4; determining a first use time length proportion corresponding to the target SOC interval according to the first use time length and the second use time length; and determining a target cycle number corresponding to the target SOC interval according to the first use time-length ratio and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number. And determining a first use time length proportion of the target SOC interval in the total use time length of the plurality of SOC intervals, taking the first use time length proportion as the weight of the target SOC interval, and multiplying the weight by a preset battery cycle test cycle number to obtain the target cycle number of the target SOC interval.

The distribution of the triggering charge and discharge times in the multiple SOC intervals is different when the market vehicle runs, for example, the first charge and discharge times of the vehicle battery triggering charge and discharge in the target SOC interval may be determined according to the historical operating state data, and the second charge and discharge times of the vehicle battery may be determined, where the second charge and discharge times are the total charge and discharge times of the vehicle battery triggering charge and discharge in the multiple SOC intervals, and the one charge and discharge times include one charge and one discharge; determining a first charge-discharge frequency proportion corresponding to the target SOC interval according to the first charge-discharge frequency and the second charge-discharge frequency; and determining a target cycle number corresponding to the target SOC interval according to the first charge-discharge frequency proportion and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

And counting the corresponding multiple charge-discharge multiplying powers triggered by the market-end vehicle in multiple SOC states at different running temperatures, wherein the usage duty ratio distribution and the charge-discharge times triggered by the multiple charge-discharge multiplying powers are used as reference values of the step circulation charge-discharge current in the circulation test.

FIG. 5 is a schematic diagram of a plurality of charge-discharge rates in a certain SOC interval during operation of a market vehicle according to an alternative embodiment of the present invention, as shown in FIG. 5, according to historical operating state data, determining a plurality of charge-discharge rates adopted when a vehicle battery charges and discharges in a target SOC interval, and determining a third usage period corresponding to each of the plurality of charge-discharge rates; determining a first use duration of the vehicle battery in the target SOC interval according to the historical working state data; determining a second use time length proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third use time length and the first use time length; according to the second use time length proportion and the plurality of charge-discharge multiplying powers, multiplying the second use time length proportion corresponding to each of the plurality of charge-discharge multiplying powers in the target SOC section by the corresponding plurality of charge-discharge multiplying power sections, wherein the plurality of charge-discharge multiplying power sections can take section intermediate values to determine the target charge-discharge current corresponding to the target SOC section.

According to an alternative embodiment of the present invention, the distribution of the number of times of triggering charge and discharge at a plurality of charge and discharge rates in a certain SOC interval may also be different when the market vehicle is running. According to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining third charge-discharge times corresponding to the plurality of charge-discharge multiplying factors; determining the second charge and discharge times of the vehicle battery in the target SOC interval according to the historical working state data; determining a second charge-discharge frequency proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third charge-discharge frequency and the second charge-discharge frequency; and determining a target charge-discharge current corresponding to the target SOC interval according to the second charge-discharge frequency proportion and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current. The second charge-discharge frequency proportion corresponding to each of the plurality of charge-discharge multiplying factors in the target SOC interval is multiplied by the corresponding plurality of charge-discharge multiplying factor intervals, wherein the plurality of charge-discharge multiplying factor intervals can take interval intermediate values to determine the target charge-discharge current corresponding to the target SOC interval.

S304: and (5) making a cycle life test scheme of the battery to be tested.

Setting a test scheme according to the test parameter values obtained in the step S302:

s1: charging: charging the battery for a certain time by using a constant current, wherein the cut-off voltage is the upper limit voltage of the battery core;

s2: discharging: and discharging the battery for a certain time by using a constant current, wherein the cut-off voltage is the lower limit voltage of the battery core.

Starting from the 99% to 95% soc interval with S1 to S2 as one cycle, the test parameter values of the 99% to 95% soc interval determined according to step S302: the cycle number and the charge-discharge current are circulated in the interval, the charge current, the discharge current and the cycle number in the next 95% to 90% SOC interval are adjusted, and the next 95% to 90% SOC interval circulation is started until the last 5% to 0% SOC interval is ended.

According to the testing method described by the testing scheme, in the testing process of charging and discharging of the battery to be tested, the temperature difference between the circulating temperature of the battery to be tested and the temperature of the testing environment is not more than 15 ℃; after the charging process is finished, placing the battery to be tested for 2s, and after the discharging process is finished, placing the battery to be tested for 60s; in the charging or discharging process, the battery to be tested is under the environment of 2 to 5 standard atmospheres and under the constraint force of a metal clamp; the battery to be tested may be a lithium battery in which LFP or NCM is used as a positive electrode material.

S306: and (5) carrying out cycle life test on the battery to be tested.

The invention provides a specific alternative embodiment, which provides a cycle life testing method based on the operation of a market vehicle, wherein the operation data of the market vehicle for 1 year is counted, the use distribution of a plurality of SOC intervals is obtained through analysis, the charge and discharge times of a vehicle battery are triggered in the plurality of SOC intervals, and the charge and discharge current distribution in the plurality of SOC intervals is used for predicting the operation state operation parameters of the vehicle battery in 15 years later according to the operation state rule of the vehicle battery in the operation of the market vehicle in one year, and the operation parameters are used as the historical operation state data of the vehicle battery in the market for the cycle life test, and the test scheme of the step S304 is adopted for prediction. Table 1 shows the values of the cycle test parameters for alternative embodiments of the invention as they were tested at a test temperature of 45 c.

TABLE 1

Accordingly, the present invention also provides a prior art battery test embodiment as a comparison to the alternative embodiments described above. The comparison example is a cycle life testing method based on the operation of a vehicle at the market end, and the comparison example is different from the alternative embodiment in parameter setting, charging and discharging modes and standing time, and in the comparison example, 1C constant-current constant-voltage charging is directly adopted, and the comparison example is stood for 30min and circulated in a mode of 1C constant-current discharging until the capacity is 80% of the initial capacity.

For the testing time when the capacity retention rates of the specific optional embodiment and the comparative example are similar, the cycle life testing method used in the embodiment can be known, the testing time is shortened, and the testing current parameter is closer to the actual running condition of the whole vehicle in the market.

S308: and performing capacity test on the battery to be tested. After the cycle is finished, the capacity retention rate of the battery to be tested is tested by using the 1C/1C constant volume test, and in order to better compare the technical effects generated by the alternative embodiment of the invention, the alternative embodiment provided by the invention is compared with the alternative embodiment in a list, and table 2 is used for comparing the alternative embodiment provided by the invention with the LFP cycle capacity retention rate of 80% in the alternative embodiment, when the same cycle test reaches the same capacity retention rate of 80%, the cycle number of the alternative embodiment tested according to the test parameters is 66000 times, the cycle test days are about 77 days, the cycle number of the alternative embodiment is 1200, and the cycle test days are about 150 days, so that the cycle days of the alternative embodiment of the invention are shorter, and the battery test time is greatly shortened and the test efficiency is improved while the working state of the vehicle battery at the market end is truly simulated when the vehicle is running.

TABLE 2

Cycle test	Test method	Cycle number/number of times	Days/day of cycle test
				Alternative embodiments	Testing according to test parameters	66000	About 77 days
Comparative example	IC/1C cycle	1200	About 150 days

It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present invention is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present invention. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present invention.

From the above description of the embodiments, it will be clear to those skilled in the art that the battery testing method according to the above embodiments may be implemented by means of software plus necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method of the various embodiments of the present invention.

According to an embodiment of the present invention, there is further provided an apparatus for implementing the above battery testing method, and fig. 6 is a block diagram of a battery testing apparatus according to an embodiment of the present invention, as shown in fig. 6, including: the battery test apparatus will be described below with reference to the acquisition unit 62, the first determination module 64, and the second determination module 66.

The obtaining unit 62 is configured to obtain historical operating state data of the vehicle battery, where the vehicle battery is located in the market-end vehicle, and the historical operating state data represents an operating state of the vehicle battery when the market-end vehicle is running.

The first determining module 64 is connected to the obtaining unit 62, and is configured to determine test parameter values corresponding to each of the plurality of battery state of charge SOC intervals according to the historical operating state data, where the test parameter values are used to simulate an operating state of the vehicle battery corresponding to each of the plurality of SOC intervals.

The second determining module 66 is connected to the first determining module 64, and is configured to perform a cyclic test on the battery to be tested in a plurality of SOC intervals according to the test parameter values, so as to obtain a test result of the battery to be tested, where a battery model of the battery to be tested is matched with a battery model of the vehicle battery.

Here, the above-mentioned obtaining unit 62, the first determining module 64, and the second determining module 66 correspond to steps S202 to S206 in the embodiment, and the three modules are the same as the examples and application scenarios implemented by the corresponding steps, but are not limited to those disclosed in the above-mentioned embodiment. It should be noted that the above-described module may be operated as a part of the apparatus in the computer terminal 10 provided in the embodiment.

Embodiments of the present invention may provide a computer device, optionally in this embodiment, the computer device may be located in at least one network device of a plurality of network devices of a computer network. The computer device includes a memory and a processor.

The memory may be used to store software programs and modules, such as program instructions/modules corresponding to the battery testing method and apparatus in the embodiments of the present invention, and the processor executes the software programs and modules stored in the memory, thereby executing various functional applications and data processing, that is, implementing the battery testing method described above. The memory may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory may further include memory remotely located relative to the processor, which may be connected to the computer terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The processor may call the information and the application program stored in the memory through the transmission device to perform the following steps: acquiring historical working state data of a vehicle battery, wherein the vehicle battery is positioned in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs; according to the historical working state data, determining test parameter values corresponding to each of a plurality of battery state of charge (SOC) intervals, wherein the test parameter values are used for simulating the working states of the vehicle battery corresponding to each of the plurality of SOC intervals; and respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals according to the test parameter values to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery.

Optionally, the above processor may further execute program code for: according to the test parameter values, respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals, including: for any of the plurality of SOC intervals, the following test steps are performed: determining an upper interval limit and a lower interval limit corresponding to a target SOC interval in the plurality of SOC intervals, wherein the target SOC interval is any interval in the plurality of SOC intervals; and carrying out target cycle test on the battery to be tested in the target SOC interval according to the test parameter value, wherein any one cycle test in the target cycle test comprises the following steps: and charging the battery to be tested to the upper limit of the interval, and discharging the battery to be tested to the lower limit of the interval.

Optionally, the above processor may further execute program code for: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: determining target historical data corresponding to a target SOC interval in the historical operating state data, wherein the target historical data represents the operating state of the vehicle battery in the target SOC interval; and determining a target parameter value corresponding to the target SOC interval according to the target historical data, wherein the test parameter value comprises the target parameter value.

Optionally, the above processor may further execute program code for: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: according to the historical working state data, determining a first using time length of the vehicle battery in a target SOC interval and determining a second using time length of the vehicle battery, wherein the second using time length is the total using time length of the vehicle battery in a plurality of SOC intervals; determining a first use time length proportion corresponding to the target SOC interval according to the first use time length and the second use time length; and determining a target cycle number corresponding to the target SOC interval according to the first use time-length ratio and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

Optionally, the above processor may further execute program code for: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: according to the historical working state data, determining first charge and discharge times of triggering charge and discharge of the vehicle battery in a target SOC (state of charge) interval and determining second charge and discharge times of the vehicle battery, wherein the second charge and discharge times are total charge and discharge times of triggering charge and discharge of the vehicle battery in a plurality of SOC intervals; determining a first charge-discharge frequency proportion corresponding to the target SOC interval according to the first charge-discharge frequency and the second charge-discharge frequency; and determining a target cycle number corresponding to the target SOC interval according to the first charge-discharge frequency proportion and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

Optionally, the above processor may further execute program code for: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining a third using time length corresponding to each of the plurality of charge-discharge multiplying factors; determining a first use duration of the vehicle battery in the target SOC interval according to the historical working state data; determining a second use time length proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third use time length and the first use time length; and determining a target charge-discharge current corresponding to the target SOC interval according to the second use time length ratio and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current.

Optionally, the above processor may further execute program code for: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining third charge-discharge times corresponding to the plurality of charge-discharge multiplying factors; determining the second charge and discharge times of the vehicle battery in the target SOC interval according to the historical working state data; determining a second charge-discharge frequency proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third charge-discharge frequency and the second charge-discharge frequency; and determining a target charge-discharge current corresponding to the target SOC interval according to the second charge-discharge frequency proportion and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current.

By adopting the embodiment of the invention, a battery test scheme is provided. The method comprises the steps of obtaining historical working state data of a vehicle battery, wherein the vehicle battery is located in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs; then, according to the historical working state data, determining test parameter values corresponding to each of a plurality of battery state of charge (SOC) intervals, wherein the test parameter values are used for simulating the working states of the vehicle battery corresponding to each of the plurality of SOC intervals; according to the test parameter values, respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery, so that the purpose that the set test parameter can simulate the working state of the vehicle battery when the market vehicle runs when the vehicle battery is tested is achieved, the technical effects of improving the authenticity and reliability when the vehicle battery is tested are achieved, and the technical problem that the set test parameter cannot truly simulate the working state of the vehicle battery when the market vehicle runs when the power battery in the vehicle is tested in the prior art is solved.

Those skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program for instructing a terminal device to execute on associated hardware, the program may be stored in a non-volatile storage medium, and the storage medium may include: flash disk, read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), magnetic or optical disk, and the like.

Embodiments of the present invention also provide a nonvolatile storage medium. Alternatively, in the present embodiment, the above-described nonvolatile storage medium may be used to store the program code executed by the battery test method provided in the above-described embodiment.

Alternatively, in this embodiment, the above-mentioned nonvolatile storage medium may be located in any one of the computer terminals in the computer terminal group in the computer network, or in any one of the mobile terminals in the mobile terminal group.

Optionally, in the present embodiment, the non-volatile storage medium is arranged to store program code for performing the steps of: acquiring historical working state data of a vehicle battery, wherein the vehicle battery is positioned in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs; according to the historical working state data, determining test parameter values corresponding to each of a plurality of battery state of charge (SOC) intervals, wherein the test parameter values are used for simulating the working states of the vehicle battery corresponding to each of the plurality of SOC intervals; and respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals according to the test parameter values to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery.

Optionally, in the present embodiment, the non-volatile storage medium is arranged to store program code for performing the steps of: according to the test parameter values, respectively carrying out cyclic test on the battery to be tested in a plurality of SOC intervals, including: for any of the plurality of SOC intervals, the following test steps are performed: determining an upper interval limit and a lower interval limit corresponding to a target SOC interval in the plurality of SOC intervals, wherein the target SOC interval is any interval in the plurality of SOC intervals; and carrying out target cycle test on the battery to be tested in the target SOC interval according to the test parameter value, wherein any one cycle test in the target cycle test comprises the following steps: and charging the battery to be tested to the upper limit of the interval, and discharging the battery to be tested to the lower limit of the interval.

Optionally, in the present embodiment, the non-volatile storage medium is arranged to store program code for performing the steps of: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: determining target historical data corresponding to a target SOC interval in the historical operating state data, wherein the target historical data represents the operating state of the vehicle battery in the target SOC interval; and determining a target parameter value corresponding to the target SOC interval according to the target historical data, wherein the test parameter value comprises the target parameter value.

Optionally, in the present embodiment, the non-volatile storage medium is arranged to store program code for performing the steps of: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: according to the historical working state data, determining a first using time length of the vehicle battery in a target SOC interval and determining a second using time length of the vehicle battery, wherein the second using time length is the total using time length of the vehicle battery in a plurality of SOC intervals; determining a first use time length proportion corresponding to the target SOC interval according to the first use time length and the second use time length; and determining a target cycle number corresponding to the target SOC interval according to the first use time-length ratio and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

Optionally, in the present embodiment, the non-volatile storage medium is arranged to store program code for performing the steps of: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: according to the historical working state data, determining first charge and discharge times of triggering charge and discharge of the vehicle battery in a target SOC (state of charge) interval and determining second charge and discharge times of the vehicle battery, wherein the second charge and discharge times are total charge and discharge times of triggering charge and discharge of the vehicle battery in a plurality of SOC intervals; determining a first charge-discharge frequency proportion corresponding to the target SOC interval according to the first charge-discharge frequency and the second charge-discharge frequency; and determining a target cycle number corresponding to the target SOC interval according to the first charge-discharge frequency proportion and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

Optionally, in the present embodiment, the non-volatile storage medium is arranged to store program code for performing the steps of: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining a third using time length corresponding to each of the plurality of charge-discharge multiplying factors; determining a first use duration of the vehicle battery in the target SOC interval according to the historical working state data; determining a second use time length proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third use time length and the first use time length; and determining a target charge-discharge current corresponding to the target SOC interval according to the second use time length ratio and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current.

Optionally, in the present embodiment, the non-volatile storage medium is arranged to store program code for performing the steps of: according to the historical working state data, determining the test parameter values corresponding to each of the plurality of battery state of charge (SOC) intervals comprises the following steps: according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining third charge-discharge times corresponding to the plurality of charge-discharge multiplying factors; determining the second charge and discharge times of the vehicle battery in the target SOC interval according to the historical working state data; determining a second charge-discharge frequency proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third charge-discharge frequency and the second charge-discharge frequency; and determining a target charge-discharge current corresponding to the target SOC interval according to the second charge-discharge frequency proportion and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current.

The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of units may be a logic function division, and there may be another division manner in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a non-volatile storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. A battery testing method, comprising:

acquiring historical working state data of a vehicle battery, wherein the vehicle battery is positioned in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs;

determining test parameter values corresponding to each of a plurality of battery state of charge (SOC) intervals according to the historical working state data, wherein the test parameter values are used for simulating the working states of the vehicle battery corresponding to each of the plurality of SOC intervals;

and respectively carrying out cyclic test on the battery to be tested in the SOC intervals according to the test parameter values to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery.

2. The method according to claim 1, wherein the performing the cyclic test on the battery to be tested in the plurality of SOC intervals, respectively, according to the test parameter values, includes:

For any of the plurality of SOC intervals, performing the following test steps:

determining an upper interval limit and a lower interval limit corresponding to a target SOC interval in the plurality of SOC intervals, wherein the target SOC interval is any interval in the plurality of SOC intervals;

and carrying out target cycle test on the battery to be tested in the target SOC interval according to the test parameter value, wherein any one cycle test in the target cycle test comprises the following steps: and charging the battery to be tested to the upper limit of the interval, and discharging the battery to be tested to the lower limit of the interval.

3. The method of claim 2, wherein determining test parameter values for each of a plurality of battery state of charge SOC intervals based on the historical operating state data comprises:

determining target historical data corresponding to the target SOC interval in the historical operating state data, wherein the target historical data represents the operating state of the vehicle battery in the target SOC interval;

and determining a target parameter value corresponding to the target SOC interval according to the target historical data, wherein the test parameter value comprises the target parameter value.

4. The method of claim 2, wherein determining test parameter values for each of a plurality of battery state of charge SOC intervals based on the historical operating state data comprises:

according to the historical working state data, determining a first using time length of the vehicle battery in the target SOC interval and determining a second using time length of the vehicle battery, wherein the second using time length is the total using time length of the vehicle battery in the plurality of SOC intervals;

determining a first use time length proportion corresponding to the target SOC interval according to the first use time length and the second use time length;

and determining a target cycle number corresponding to the target SOC interval according to the first use time-length ratio and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

5. The method of claim 2, wherein determining test parameter values for each of a plurality of battery state of charge SOC intervals based on the historical operating state data comprises:

according to the historical working state data, determining first charge and discharge times of triggering charge and discharge of the vehicle battery in the target SOC interval and determining second charge and discharge times of the vehicle battery, wherein the second charge and discharge times are total charge and discharge times of triggering charge and discharge of the vehicle battery in the plurality of SOC intervals;

Determining a first charge-discharge frequency proportion corresponding to the target SOC interval according to the first charge-discharge frequency and the second charge-discharge frequency;

and determining a target cycle number corresponding to the target SOC interval according to the first charge-discharge frequency proportion and a preset battery cycle test cycle number, wherein the test parameter value comprises the target cycle number.

6. The method of claim 2, wherein determining test parameter values for each of a plurality of battery state of charge SOC intervals based on the historical operating state data comprises:

according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining a third using time length corresponding to each of the plurality of charge-discharge multiplying factors;

determining a first use duration of the vehicle battery in the target SOC interval according to the historical working state data;

determining a second usage time length proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third usage time length and the first usage time length;

and determining a target charge-discharge current corresponding to the target SOC interval according to the second use time-length ratio and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current.

7. The method of claim 2, wherein determining test parameter values for each of a plurality of battery state of charge SOC intervals based on the historical operating state data comprises:

according to the historical working state data, determining a plurality of charge-discharge multiplying factors adopted when the vehicle battery is charged and discharged in the target SOC interval, and determining third charge-discharge times corresponding to the charge-discharge multiplying factors;

determining a second charge and discharge frequency of the vehicle battery in the target SOC interval according to the historical working state data;

determining a second charge-discharge frequency proportion corresponding to each of the plurality of charge-discharge multiplying factors according to the third charge-discharge frequency and the second charge-discharge frequency;

and determining a target charge-discharge current corresponding to the target SOC interval according to the second charge-discharge frequency proportion and the plurality of charge-discharge multiplying powers, wherein the test parameter value comprises the target charge-discharge current.

8. A battery testing device is characterized in that,

the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring historical working state data of a vehicle battery, the vehicle battery is positioned in a market-end vehicle, and the historical working state data represents the working state of the vehicle battery when the market-end vehicle runs;

The first determining module is used for determining test parameter values corresponding to each of a plurality of battery state of charge (SOC) intervals according to the historical working state data, wherein the test parameter values are used for simulating the working states of the vehicle battery corresponding to each of the plurality of SOC intervals;

and the second determining module is used for respectively carrying out cyclic test on the battery to be tested in the SOC intervals according to the test parameter values to obtain a test result of the battery to be tested, wherein the battery model of the battery to be tested is matched with the battery model of the vehicle battery.

9. A non-volatile storage medium, characterized in that the non-volatile storage medium comprises a stored program, wherein the program, when run, controls a device in which the non-volatile storage medium is located to perform the battery life test method of any one of claims 1 to 7.

10. A computer device comprising a memory for storing a program and a processor for executing the program stored in the memory, wherein the program when executed performs the battery life test method of any one of claims 1 to 7.