CN116995340A - Multipolar self-switching detection device and detection method for energy storage battery box - Google Patents
Multipolar self-switching detection device and detection method for energy storage battery box Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H—ELECTRICITY
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
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Abstract
The invention relates to the field of energy storage battery detection, in particular to an energy storage battery box multipolar self-switching detection device and a detection method thereof, wherein the detection method comprises the following steps: the acquisition detection unit carries out natural temperature rise detection on the target battery for a plurality of times and respectively generates first analysis images corresponding to each natural temperature rise detection; the temperature analysis unit counts the rising time corresponding to each rising coefficient, determines a temperature control range according to the rising time, and carries out first auxiliary temperature rise detection on the target battery and generates a temperature control strategy; the working condition analysis unit detects working condition states of the target battery and determines a working condition control strategy according to the corresponding working condition reference quantity detected by each working condition state; according to the invention, corresponding temperature control strategies and working condition control strategies are generated according to the temperature rising characteristics of the target battery under different detection temperatures and different working conditions, so that the thermal management effect of the battery is improved.
Description
Technical Field
The invention relates to the field of energy storage battery detection, in particular to a multi-pole self-switching type detection device and a detection method for an energy storage battery box.
Background
An energy storage battery is a device that is capable of converting electrical energy into chemical energy and reconverting it into electrical energy when needed. They play a role in storing and releasing electric energy in the electric power system, the low temperature environment will have a negative effect on the performance of the battery in winter use, the chemical reaction rate of the battery will decrease at lower temperature, resulting in a decrease in the discharge capacity and energy storage capacity of the battery, and the low temperature will increase the brittleness of the battery material, resulting in an increase in the risk of structural damage or internal short circuit, so the thermal management system is generally required to control and adjust the battery temperature to keep the battery working in a suitable temperature range, improving the performance and prolonging the life, but in the prior art, the thermal management system is generally used to control the battery thermal insulation heating device for the real-time temperature of the energy storage battery, but how to set the preset temperature threshold of the thermal management system and how to control the battery thermal insulation heating device for different discharge conditions is a problem to be solved by the current technicians.
Chinese patent publication No. CN110146819B discloses a method and system for estimating the actual temperature rise time of a battery, an automobile, a device and a storage medium, comprising the steps of: step 1: acquiring ideal reference heating Time RfTiTemp when the battery is heated from the current self temperature tc to the battery charging low-temperature threshold temperature TiTiTiTime 0 under the current ambient temperature Wc before charging; step 2: acquiring at least one of a charging mode thermal coefficient ChrgModeF and a load consumption thermal coefficient CnsF, wherein the charging mode thermal coefficient ChrgModeF influences the charging gun output power on the ideal reference temperature rise time estimation, and the load consumption thermal coefficient CnsF influences the battery temperature rise time estimation before charging; step 3: and estimating the actual heating Time ChrgPHeatTi when the current self temperature is heated to the battery charging low temperature threshold temperature Time0 before the battery is charged according to at least one of the charging mode thermal coefficient ChrgModeF and the load consumption thermal coefficient CnsF and the ideal reference heating Time RfTiTemp. In addition, chinese patent publication No. CN110154835a discloses a high-energy battery pack heating temperature control system and a control method thereof, including a battery pack remaining power detection system for detecting a battery remaining power; a battery pack temperature detection system for detecting a battery temperature; a battery pack heating system for heating the battery; a battery pack temperature equalizing system for equalizing the temperature of the battery pack; and a controller connected with and controlling the battery pack remaining power detection system. The battery pack temperature detection system and the battery pack heating system can judge a battery thermal management mode. Therefore, the above technical solutions respectively disclose the technical solutions of battery temperature rise detection and battery heating temperature control, but have the following problems: the working parameters of the thermal management system cannot be set according to actual application scenes, and the battery thermal insulation heating device cannot be correspondingly controlled according to different discharging working conditions, so that the problem of poor battery temperature rising control precision is solved.
Disclosure of Invention
Therefore, the invention provides a multi-pole self-switching detection device and a detection method for an energy storage battery box, which are used for solving the problems that in the prior art, working parameters of a thermal management system cannot be set according to actual application scenes, and a battery heat preservation and heating device cannot be correspondingly controlled according to different discharging working conditions, so that the temperature rise control precision of a battery is poor.
In order to achieve the above object, the present invention provides a multi-pole self-switching detection method for an energy storage battery box, comprising:
the acquisition detection unit carries out natural temperature rise detection on the target battery for a plurality of times and respectively generates first analysis images corresponding to each natural temperature rise detection;
the temperature analysis unit analyzes each first analysis image to obtain ascending coefficients, counts ascending time periods corresponding to the ascending coefficients, and determines a temperature control range according to the ascending time periods;
the temperature analysis unit controls the acquisition detection unit to respectively take the intermediate value of each temperature control range as a detection temperature and perform first auxiliary temperature rise detection on the target battery, detects the battery temperature rise time corresponding to the rising coefficient of each first auxiliary temperature rise detection, and sets the temperature control strategy of the corresponding temperature control range to adopt a first auxiliary temperature rise device when the battery temperature rise time is in a first preset temperature rise range or a second preset temperature rise range;
The working condition analysis unit detects working condition states of the target battery and determines a working condition control strategy according to the corresponding working condition reference quantity detected by each working condition state, wherein the working condition control strategy comprises no need of adjustment of the auxiliary heating device, reduced adjustment of power of the auxiliary heating device and pause switching duration setting of the auxiliary heating device;
transmitting the temperature control strategy and the working condition control strategy to a user through a display unit;
the battery temperature rising time is in a third preset temperature rising range, and the temperature analysis unit judges that the second auxiliary temperature rising detection is carried out.
Further, the acquisition and detection unit carries out N times of natural temperature rise detection on the target battery and correspondingly generates N first analysis images, the temperature analysis unit respectively analyzes each first analysis image to obtain the rising coefficient,
the calculation formula of the rising coefficient Ki of the ith first analysis image is:
Ki＝（Timax-Timin）/ti；
wherein, timax is the peak temperature in the ith first analysis image, timin is the initial temperature in the ith first analysis image, i=1, 2,3, … …, N;
the natural temperature rise detection is that the acquisition detection unit controls the detection temperature to be a preset detection temperature and discharges the target battery under standard working conditions, the acquisition detection unit acquires the corresponding change relation between the temperature of the target battery and time in the discharging process and generates a first analysis image, and the first analysis image is a two-dimensional coordinate system with a horizontal axis being time and a vertical axis being the temperature of the target battery.
Further, the temperature analysis unit counts the rising coefficients under the first temperature analysis condition and extracts rising time periods corresponding to the rising coefficients, and the temperature analysis unit determines a temperature control range according to the rising time periods;
if the rising time length is within a first preset rising time length range, the temperature analysis unit judges that the detected temperature of the natural heating detection corresponding to the rising time length is a first-level detected temperature;
if the rising time length is within a second preset rising time length range, the temperature analysis unit judges that the detected temperature of the natural heating detection corresponding to the rising time length is a second-level detected temperature;
if the rising time length is within a third preset rising time length range, the temperature analysis unit judges that the detected temperature of the natural heating detection corresponding to the rising time length is three-level detected temperature;
the temperature control range comprises a first temperature control range, a second temperature control range, a third temperature control range and a fourth temperature control range, wherein the numerical values in the first temperature control range are larger than the first temperature control detection temperature and smaller than or equal to the second temperature control detection temperature, the numerical values in the second temperature control range are larger than the second temperature control detection temperature and smaller than or equal to the third temperature control detection temperature, the numerical values in the third temperature control range are larger than the third temperature control detection temperature, and the numerical values in the fourth temperature control range are smaller than or equal to the first temperature control detection temperature; the first temperature control detection temperature is the average value of the sum of the first-stage detection temperatures, the second temperature control detection temperature is the average value of the sum of the second-stage detection temperatures, the third temperature control detection temperature is the average value of the sum of the third-stage detection temperatures, and the first temperature analysis condition is that the determination of the rising coefficient is completed.
Further, the temperature analysis unit controls the acquisition detection unit to respectively take the intermediate value of each temperature control range as the detection temperature under the second temperature analysis condition, and carries out first auxiliary temperature rise detection on the target battery, and detects the battery temperature rise time corresponding to the rising coefficient of each first auxiliary temperature rise detection;
if the battery temperature rising time length is in a first preset temperature rising range, the temperature analysis unit judges that the first auxiliary temperature rising detection is qualified and sets a temperature control strategy of a corresponding temperature control range, and a first auxiliary temperature rising device is adopted to heat with preset initial power;
if the battery temperature rising time length is in a second preset temperature rising range, the temperature analysis unit sets a temperature control strategy of a corresponding temperature control range, adopts a first auxiliary temperature rising device to raise the temperature, and increases and adjusts the operation power of the first auxiliary temperature rising device;
if the battery temperature rising time length is in a third preset temperature rising range, the temperature analysis unit judges that second auxiliary temperature rising detection is carried out aiming at the corresponding temperature control range;
the first auxiliary temperature rise detection is that the acquisition detection unit adjusts the detection temperature to be the middle value of each temperature control range and discharges the target battery under the standard working condition, the acquisition detection unit uses the first auxiliary temperature rise device to heat the target battery, the acquisition detection unit acquires the corresponding change relation between the temperature and time of the target battery in the discharge process and generates a second analysis image, and the second temperature analysis condition is that the determination of the temperature control range is completed.
Further, the temperature analysis unit increases and adjusts the power of the air pump of the first auxiliary temperature rising device according to the temperature rising time of the battery under the third temperature analysis condition,
the difference value of the power increment of the air pump and the battery temperature rise duration is in positive correlation;
the third temperature analysis condition is that the temperature rise time of the battery is in a second preset temperature rise range.
Further, the temperature analysis unit performs second auxiliary temperature rise detection in a corresponding temperature control range when the temperature rise time of the battery is in a third preset temperature rise range, wherein the first auxiliary temperature rise device of the acquisition detection unit is closed, and the second auxiliary temperature rise device is adopted to heat the target battery; the temperature analysis unit detects the battery temperature rise time length corresponding to the rising coefficient of each second auxiliary temperature rise detection;
if the battery temperature rising time length is in a first preset temperature rising range, the temperature analysis unit judges that the second auxiliary temperature rising detection is qualified and sets a temperature control strategy of a corresponding temperature control range, and a second auxiliary temperature rising device is adopted for temperature rising;
if the battery temperature rising time is in a second preset temperature rising range or a third preset temperature rising range, the temperature analysis unit sets a temperature control strategy of a corresponding temperature control range, adopts a second auxiliary temperature rising device to raise the temperature, and increases and adjusts the operating power of the second auxiliary temperature rising device.
Further, the working condition analysis unit detects working condition states of the target battery under the first working condition analysis condition and determines a working condition control strategy according to the corresponding working condition reference quantity detected by each working condition state;
if the working condition reference quantity is in the first working condition reference state, the working condition analysis unit judges that the auxiliary heating device of the working condition control strategy corresponding to the current working condition switching frequency does not need to be adjusted;
if the working condition reference quantity is in the second working condition reference state, the working condition analysis unit judges that the power of the auxiliary heating device of the working condition control strategy corresponding to the current working condition switching frequency is reduced and adjusted;
if the working condition reference quantity is in the third working condition reference state, the working condition analysis unit judges that the auxiliary heating device of the working condition control strategy corresponding to the current working condition switching frequency is subjected to pause switching time setting;
the first working condition reference state is that the time length of the target battery reaching the maximum temperature is longer than the preset reference heating time length and the maximum temperature of the target battery is smaller than or equal to the preset maximum temperature, the second working condition reference state is that the time length of the target battery reaching the maximum temperature is longer than the preset reference heating time length and the maximum temperature of the target battery is greater than the preset maximum temperature, the third working condition reference state is that the time length of the target battery reaching the maximum temperature is smaller than or equal to the preset reference heating time length and the maximum temperature of the target battery is greater than the preset maximum temperature, and the first working condition analysis condition is that the temperature management and control strategies corresponding to all the temperature management and control ranges are all determined to be completed.
Further, the working condition analysis unit calculates a temperature difference value between the maximum temperature of the target battery and a preset maximum temperature under the second working condition analysis condition, and reduces and adjusts the power of the auxiliary heating device according to the temperature difference value;
the reduction amount of the power of the auxiliary temperature rising device and the temperature difference value are in positive correlation;
the second working condition analysis condition is that the working condition reference quantity is in a second working condition reference state.
Further, the working condition analysis unit determines the pause time of the auxiliary heating device according to the time difference between the time when the target battery reaches the maximum temperature and the preset reference heating time under the third working condition analysis condition;
the pause time of the auxiliary temperature rising device is in positive correlation with the time difference value;
the third working condition analysis condition is that the working condition reference quantity is in a third working condition reference state.
The invention also provides a multipole self-switching detection device of the energy storage battery box applying the detection method, which comprises the following steps:
the collecting and detecting unit is used for carrying out discharge detection on the target battery, controlling the target battery to discharge at different temperatures and detecting the temperature of the target battery;
the temperature analysis unit is connected with the acquisition detection unit and used for extracting the rising time length corresponding to each rising coefficient, determining a temperature control range according to the rising time length, controlling the acquisition detection unit to take the middle value of each temperature control range as the detection temperature, performing first auxiliary heating detection on the target battery, and determining an auxiliary heating device and operating power corresponding to a temperature control strategy according to the battery heating time length corresponding to each rising coefficient in each first auxiliary heating detection;
The working condition analysis unit is connected with the acquisition detection unit and the temperature analysis unit and is used for detecting working condition states of the target battery and determining a working condition control strategy according to corresponding working condition reference quantities detected by the working condition states, and the working condition control strategy comprises no need of adjusting the auxiliary heating device, reducing and adjusting the power of the auxiliary heating device and setting the pause switching time of the auxiliary heating device;
the display unit is connected with the acquisition and detection unit, the temperature analysis unit and the working condition analysis unit and is used for inputting initial parameter information of the acquisition and detection unit and displaying a first analysis image, a second analysis image, a temperature control strategy and a working condition control strategy; the initial parameter information comprises a preset detection temperature, a standard working condition, a preset working condition switching frequency, and a first discharging working condition and a second discharging working condition which correspond to the preset working condition switching frequency.
Compared with the prior art, the method and the device have the advantages that the technical scheme of the invention carries out natural temperature rise detection on the detection temperature input by a user, and obtains the first analysis image of the target battery under different detection temperatures, thereby reflecting the temperature rise characteristics of the target battery under different detection temperatures, according to the rising time corresponding to the rising coefficient of the first analysis image, the temperature analysis unit determines the temperature control range according to the rising time, so that the subsequent data processing capacity is reduced, meanwhile, the limitation on the detection temperature quantity input by the user is abandoned, the setting of the temperature control range enables the temperature control strategy of the invention to have pertinence, in addition, the working condition analysis unit determines the working condition control strategy according to the working condition reference quantity corresponding to the detection of each working condition state of the target battery, the control error of the thermal management system caused by the discharge power switching in the prior art is abandoned as far as possible, the judgment precision of the invention is further improved, the temperature control precision of the target battery is higher, the detection temperature and the preset working condition switching frequency in the initial parameter information is not limited, thus the operation difficulty of the user is reduced, and the temperature control strategy and the preset working condition control strategy can be generated correspondingly and adjusted, and the temperature control strategy is convenient to obtain.
Drawings
FIG. 1 is a schematic diagram of a multi-pole self-switching detection method for an energy storage battery box according to an embodiment of the present invention;
fig. 2 is a unit connection diagram of a multipole self-switching detection device for an energy storage battery box according to an embodiment of the invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1 to 2, the present invention provides a multi-pole self-switching detection method for an energy storage battery box, which includes:
the acquisition detection unit carries out natural temperature rise detection on the target battery for a plurality of times and respectively generates first analysis images corresponding to each natural temperature rise detection;
the temperature analysis unit analyzes each first analysis image to obtain ascending coefficients, counts ascending time periods corresponding to the ascending coefficients, and determines a temperature control range according to the ascending time periods;
the temperature analysis unit controls the acquisition detection unit to respectively take the intermediate value of each temperature control range as a detection temperature and perform first auxiliary temperature rise detection on the target battery, detects the battery temperature rise time corresponding to the rising coefficient of each first auxiliary temperature rise detection, and sets the temperature control strategy of the corresponding temperature control range to adopt a first auxiliary temperature rise device when the battery temperature rise time is in a first preset temperature rise range or a second preset temperature rise range;
The working condition analysis unit detects working condition states of the target battery and determines a working condition control strategy according to the corresponding working condition reference quantity detected by each working condition state, wherein the working condition control strategy comprises no need of adjustment of the auxiliary heating device, reduced adjustment of power of the auxiliary heating device and pause switching duration setting of the auxiliary heating device;
transmitting the temperature control strategy and the working condition control strategy to a user through a display unit;
the battery temperature rising time is in a third preset temperature rising range, and the temperature analysis unit judges that the second auxiliary temperature rising detection is carried out.
Specifically, the temperature control strategy transmitted by the display unit includes an auxiliary heating device and the operation power of the auxiliary heating device, wherein the auxiliary heating device is correspondingly adopted by each temperature control range, the auxiliary heating device includes a first auxiliary heating device and a second auxiliary heating device, as an implementation mode, the first auxiliary heating device and the second auxiliary heating device are provided, the first auxiliary heating device is an air heating device, the second auxiliary heating device is an electric heating device, the principle of the air heating device is to heat air through a heating component first, then heat exchange is carried out on a battery through a fan or a designed runner, heating of the battery is achieved, the principle of the electric heating device is to add an electric heating plate at the top and the bottom of a battery module, most of heat generated by the electric heating plate is transmitted to the battery in a heat conduction mode, and only a small part of heat is lost to the surrounding environment in a heat convection mode. Therefore, the heat utilization rate of the electric heating plate is higher, but the energy consumption of the electric heating plate is larger than that of the air heating device; the above heating means are well known in the prior art and will not be described here.
The working condition control strategy transmitted by the display unit comprises that the auxiliary heating device corresponding to the working condition switching frequency in the first working condition frequency range does not need to be adjusted, the power of the auxiliary heating device corresponding to the working condition switching frequency in the second working condition frequency range is reduced and adjusted, and the pause switching duration of the auxiliary heating device corresponding to the working condition switching frequency in the third working condition frequency range is set.
Specifically, the acquisition and detection unit performs N times of natural temperature rise detection on the target battery and correspondingly generates N first analysis images, the temperature analysis unit respectively analyzes each first analysis image to acquire a rising coefficient,
the calculation formula of the rising coefficient Ki of the ith first analysis image is:
Ki＝（Timax-Timin）/ti；
wherein, timax is the peak temperature in the ith first analysis image, timin is the initial temperature in the ith first analysis image, i=1, 2,3, … …, N, N is the total number of preset detection temperatures;
the natural temperature rise detection is that the acquisition detection unit controls the detection temperature to be a preset detection temperature and discharges a target battery under standard working conditions, the acquisition detection unit acquires the corresponding change relation between the temperature of the target battery and time in the discharging process and generates a first analysis image, the first analysis image is a two-dimensional coordinate system with a horizontal axis as time and a vertical axis as the temperature of the target battery, the change curve of the temperature of the target battery and the time is displayed on the two-dimensional coordinate system, the unit of time is S, and the unit of the vertical axis is DEG C.
According to the invention, the preset detection temperature user can input a practical application scene, namely, the user can detect the temperature rise state of the target battery at a single environmental temperature and detect the temperature rise states of the target battery at a plurality of environmental temperatures, so that the practicability of the invention is improved.
Specifically, the determination method of Timax, timin and ti is as follows: sequentially calculating the difference Xc and DeltaX of longitudinal axes of intervals c ＝X c -X c-100 Wherein X is c X is the vertical axis value of a point with the horizontal axis coordinate of c on the change curve of the target battery temperature and time c-100 The vertical axis value of the point c-100 on the horizontal axis coordinate on the target battery temperature and time change curve, c=100, 200,300, … …, cmax, cmax=cz×100, cz=tz/100, cz is a downward integer, if Δx c Less than DeltaX c-100 At 110% of (2), X is determined c The coordinate point on the corresponding change curve of the target battery temperature and time is an ascending stopping point, the target battery temperature corresponding to the ascending stopping point is Timax, the target battery temperature of the coordinate point corresponding to the abscissa 0 on the change curve of the target battery temperature and time is Timin, and ti is the duration corresponding to the length of the transverse axis between the two coordinate points corresponding to Timax and Timin, and the duration is recorded as the ascending duration.
Specifically, the temperature analysis unit counts the rising coefficients under the first temperature analysis condition and extracts rising time periods corresponding to the rising coefficients, and the temperature analysis unit determines a temperature control range according to the rising time periods;
if the rising time length is within a first preset rising time length range, the temperature analysis unit judges that the detected temperature of the natural heating detection corresponding to the rising time length is a first-level detected temperature;
if the rising time length is within a second preset rising time length range, the temperature analysis unit judges that the detected temperature of the natural heating detection corresponding to the rising time length is a second-level detected temperature;
if the rising time length is within a third preset rising time length range, the temperature analysis unit judges that the detected temperature of the natural heating detection corresponding to the rising time length is three-level detected temperature;
the temperature control range comprises a first temperature control range, a second temperature control range, a third temperature control range and a fourth temperature control range, wherein the numerical values in the first temperature control range are larger than the first temperature control detection temperature and smaller than or equal to the second temperature control detection temperature, the numerical values in the second temperature control range are larger than the second temperature control detection temperature and smaller than or equal to the third temperature control detection temperature, the numerical values in the third temperature control range are larger than the third temperature control detection temperature, and the numerical values in the fourth temperature control range are smaller than or equal to the first temperature control detection temperature; the first temperature control detection temperature is the average value of the sum of the first-stage detection temperatures, the second temperature control detection temperature is the average value of the sum of the second-stage detection temperatures, the third temperature control detection temperature is the average value of the sum of the third-stage detection temperatures, and the first temperature analysis condition is that the determination of the rising coefficient is completed.
In the invention, when aiming at the condition of a plurality of detected temperatures, the temperature analysis unit determines the temperature control range according to the rising time, so that the time loss caused by manually setting the temperature threshold is reduced, the setting of the temperature control range is abandoned, and the setting of the temperature control strategy is more targeted.
Specifically, a user can input a target rising duration through a display unit, the values in the first preset rising duration range are all greater than 130% of the target rising duration, the values in the second preset rising duration range are all less than or equal to 130% of the target rising duration and are greater than 70% of the target rising duration, and the values in the third preset rising duration range are all less than 70% of the target rising duration, wherein the target rising duration user can set according to the battery type, chemical characteristics, application requirements, performance requirements and safety requirements in an actual application scene, and different types of batteries show different low-temperature environments, such as lithium ion batteries, are sensitive to low temperature, and the performance and available energy of the battery are obviously reduced in a low-temperature environment. Thus, these batteries may require a longer warm-up time to reach a suitable operating temperature; according to the application requirements and performance requirements of the battery, the heating time can be determined, and the response time and the instantaneity requirements of certain applications on the battery are higher, so that shorter heating time is possibly required to enable the battery to reach the proper working temperature as soon as possible; the specific safety requirements and guidelines may vary depending on the characteristics of the battery and the field of application.
Specifically, the temperature analysis unit controls the acquisition detection unit to respectively take the intermediate value of each temperature control range as the detection temperature under the second temperature analysis condition, and carries out first auxiliary temperature rise detection on the target battery, and detects the battery temperature rise time length corresponding to the rising coefficient of each first auxiliary temperature rise detection, wherein the battery temperature rise time length is the time length corresponding to the horizontal axis length of the coordinate point corresponding to the peak temperature and the initial temperature in the second analysis image in the first auxiliary temperature rise detection;
if the battery temperature rising time length is in a first preset temperature rising range, the temperature analysis unit judges that the first auxiliary temperature rising detection is qualified and sets a temperature control strategy of a corresponding temperature control range, and a first auxiliary temperature rising device is adopted to heat with preset initial power;
if the battery temperature rising time length is in a second preset temperature rising range, the temperature analysis unit sets a temperature control strategy of a corresponding temperature control range, adopts a first auxiliary temperature rising device to raise the temperature, and increases and adjusts the operation power of the first auxiliary temperature rising device;
if the battery temperature rising time length is in a third preset temperature rising range, the temperature analysis unit judges that second auxiliary temperature rising detection is carried out aiming at the corresponding temperature control range;
The first auxiliary temperature rise detection is that the acquisition detection unit adjusts the detection temperature to be the middle value of each temperature control range and discharges the target battery under the standard working condition, the acquisition detection unit uses the first auxiliary temperature rise device to heat the target battery, the acquisition detection unit acquires the corresponding change relation between the temperature and time of the target battery in the discharge process and generates a second analysis image, and the second temperature analysis condition is that the determination of the temperature control range is completed.
Specifically, the values in the first preset temperature rising range are all smaller than 90% of the target rising duration, the values in the second preset temperature rising range are all greater than or equal to 90% of the target rising duration and smaller than 110% of the target rising duration, and the values in the third preset temperature rising range are all greater than or equal to 110% of the target rising duration.
Specifically, the temperature analysis unit increases and adjusts the power of the air pump of the first auxiliary temperature-raising device according to the temperature-raising time length of the battery under the third temperature analysis condition,
the difference value of the power increment of the air pump and the battery temperature rise duration is in positive correlation;
the third temperature analysis condition is that the temperature rise time of the battery is in a second preset temperature rise range.
Specifically, the temperature analysis unit performs second auxiliary temperature rise detection in a corresponding temperature control range when the battery temperature rise time is in a third preset temperature rise range, wherein a first auxiliary temperature rise device of the acquisition detection unit is closed, and the second auxiliary temperature rise device is adopted to heat the target battery; the temperature analysis unit detects the battery temperature rise time length corresponding to the rising coefficient of each second auxiliary temperature rise detection;
if the battery temperature rising time length is in a first preset temperature rising range, the temperature analysis unit judges that the second auxiliary temperature rising detection is qualified and sets a temperature control strategy of a corresponding temperature control range, and a second auxiliary temperature rising device is adopted for temperature rising;
if the battery temperature rising time is in a second preset temperature rising range or a third preset temperature rising range, the temperature analysis unit sets a temperature control strategy of a corresponding temperature control range, adopts a second auxiliary temperature rising device to raise the temperature, and increases and adjusts the operating power of the second auxiliary temperature rising device.
Specifically, the working condition analysis unit detects working condition states of the target battery under a first working condition analysis condition and determines working condition control strategies according to the corresponding working condition reference amounts detected by the working condition analysis unit, wherein the working condition control strategies comprise a first working condition control strategy aiming at the working condition reference amounts at working condition switching frequencies corresponding to the first working condition reference states, a second working condition control strategy aiming at the working condition reference amounts at working condition switching frequencies corresponding to the second working condition reference states and a third working condition control strategy aiming at the working condition reference amounts at working condition switching frequencies corresponding to the third working condition reference states;
If the working condition reference quantity is in the first working condition reference state, the working condition analysis unit judges that the auxiliary heating device of the working condition control strategy corresponding to the current working condition switching frequency does not need to be adjusted;
if the working condition reference quantity is in the second working condition reference state, the working condition analysis unit judges that the power of the auxiliary heating device of the working condition control strategy corresponding to the current working condition switching frequency is reduced and adjusted;
if the working condition reference quantity is in the third working condition reference state, the working condition analysis unit judges that the auxiliary heating device of the working condition control strategy corresponding to the current working condition switching frequency is subjected to pause switching time setting;
the first working condition reference state is that the time length of the target battery reaching the maximum temperature is longer than the preset reference heating time length and the maximum temperature of the target battery is smaller than or equal to the preset maximum temperature, the second working condition reference state is that the time length of the target battery reaching the maximum temperature is longer than the preset reference heating time length and the maximum temperature of the target battery is greater than the preset maximum temperature, the third working condition reference state is that the time length of the target battery reaching the maximum temperature is smaller than or equal to the preset reference heating time length and the maximum temperature of the target battery is greater than the preset maximum temperature, and the first working condition analysis condition is that the temperature management and control strategies corresponding to all the temperature management and control ranges are all determined to be completed.
Specifically, the working condition state detection is that the acquisition and detection unit controls the detection temperature to be the middle value of the second temperature control range, and performs preset working condition switching frequency discharge on the target battery, the acquisition and detection unit acquires the corresponding change relation between the temperature of the target battery and time in the discharge process and generates a working condition analysis image, the working condition analysis image is a two-dimensional coordinate system with the horizontal axis being time and the vertical axis being the temperature of the target battery, the change curve of the temperature and time of the target battery is presented on the two-dimensional coordinate system, the maximum battery temperature in the working condition analysis image is recorded as the maximum temperature, the preset maximum temperature is the maximum temperature of the target battery when the middle value of the second temperature control range is used as the detection temperature and standard working condition discharge is performed, and the preset reference heating time is the time when the middle value of the second temperature control range is used as the detection temperature and standard working condition discharge is performed; the number of times of working condition state detection is equal to the number of preset working condition switching frequencies input by a user; when the target battery is discharged at a preset working condition switching frequency, the acquisition detection unit circularly switches a first discharging working condition and a second discharging working condition of the target battery, wherein the preset working condition switching frequency is the operation duration of the first discharging working condition, and the operation duration of the second discharging working condition is the same as that of the first discharging working condition.
Specifically, the working condition analysis unit calculates a temperature difference value between the maximum temperature of the target battery and a preset maximum temperature under the second working condition analysis condition, and reduces and adjusts the power of the auxiliary heating device according to the temperature difference value;
the reduction amount of the power of the auxiliary temperature rising device and the temperature difference value are in positive correlation; the temperature difference value is a value obtained by subtracting a preset maximum temperature from the maximum temperature of the target battery;
the second working condition analysis condition is that the working condition reference quantity is in a second working condition reference state.
Specifically, the working condition analysis unit determines the suspension time of the auxiliary heating device according to the time difference between the time when the target battery reaches the maximum temperature and the preset reference heating time under the third working condition analysis condition;
the pause time of the auxiliary temperature rising device is in positive correlation with the time difference value; the time difference value is a value obtained by subtracting the time when the target battery reaches the maximum temperature from the preset reference heating time;
the third working condition analysis condition is that the working condition reference quantity is in a third working condition reference state; and controlling the current auxiliary temperature rising device to be cyclically started and closed when the target battery reaches the maximum temperature, wherein the pause time is the closing time of the target battery.
The invention also provides a multipole self-switching detection device of the energy storage battery box applying the detection method, which comprises the following steps:
the collecting and detecting unit is used for carrying out discharge detection on the target battery, controlling the target battery to discharge at different temperatures and detecting the temperature of the target battery;
the temperature analysis unit is connected with the acquisition detection unit and used for extracting the rising time length corresponding to each rising coefficient, determining a temperature control range according to the rising time length, controlling the acquisition detection unit to take the middle value of each temperature control range as the detection temperature, performing first auxiliary heating detection on the target battery, and determining an auxiliary heating device and operating power corresponding to a temperature control strategy according to the battery heating time length corresponding to each rising coefficient in each first auxiliary heating detection;
the working condition analysis unit is connected with the acquisition detection unit and the temperature analysis unit and is used for detecting working condition states of the target battery and determining a working condition control strategy according to corresponding working condition reference quantities detected by the working condition states, and the working condition control strategy comprises no need of adjusting the auxiliary heating device, reducing and adjusting the power of the auxiliary heating device and setting the pause switching time of the auxiliary heating device;
The display unit is connected with the acquisition and detection unit, the temperature analysis unit and the working condition analysis unit and is used for inputting initial parameter information of the acquisition and detection unit and receiving a first analysis image, a second analysis image, a temperature control strategy and a working condition control strategy; the initial parameter information comprises a preset detection temperature, a standard working condition, a preset working condition switching frequency, a first discharging working condition and a second discharging working condition which correspond to the preset working condition switching frequency; it is noted that the preset detection temperature input by the user should be less than 5 ℃, the discharging power of the first discharging working condition is less than the discharging power of the second discharging working condition, and the standard working condition is the average discharging power corresponding to the common working condition in the using process of the target battery in the history record.
Specifically, the collection and detection unit includes, but is not limited to, a discharging device and a battery temperature detection device, wherein the discharging power of the discharging device should be adjustable, and the discharging device and the battery temperature detection device are conventional detection devices known to those skilled in the art, and are not described herein.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The multi-pole self-switching detection method for the energy storage battery box is characterized by comprising the following steps of:
the acquisition detection unit carries out natural temperature rise detection on the target battery for a plurality of times and respectively generates first analysis images corresponding to each natural temperature rise detection;
the temperature analysis unit analyzes each first analysis image to obtain ascending coefficients, counts ascending time periods corresponding to the ascending coefficients, and determines a temperature control range according to the ascending time periods;
the temperature analysis unit controls the acquisition detection unit to respectively take the intermediate value of each temperature control range as a detection temperature and perform first auxiliary temperature rise detection on the target battery, detects the battery temperature rise time corresponding to the rising coefficient of each first auxiliary temperature rise detection, and sets the temperature control strategy of the corresponding temperature control range to adopt a first auxiliary temperature rise device when the battery temperature rise time is in a first preset temperature rise range or a second preset temperature rise range;
The working condition analysis unit detects working condition states of the target battery and determines a working condition control strategy according to the corresponding working condition reference quantity detected by each working condition state, wherein the working condition control strategy comprises no need of adjustment of the auxiliary heating device, reduced adjustment of power of the auxiliary heating device and pause switching duration setting of the auxiliary heating device;
transmitting the temperature control strategy and the working condition control strategy to a user through a display unit;
the battery temperature rising time is in a third preset temperature rising range, and the temperature analysis unit judges that the second auxiliary temperature rising detection is carried out.
2. The multi-pole self-switching detection method of the energy storage battery box according to claim 1, wherein the acquisition detection unit performs N times of natural temperature rise detection on the target battery and correspondingly generates N first analysis images, the temperature analysis unit respectively analyzes each first analysis image to obtain a rising coefficient,
the calculation formula of the rising coefficient Ki of the ith first analysis image is:
Ki＝（Timax-Timin）/ti；
wherein, timax is the peak average temperature in the ith first analysis image, timin is the initial temperature in the ith first analysis image, i=1, 2,3, … …, N;
the natural temperature rise detection is that the acquisition detection unit controls the detection temperature to be a preset detection temperature and discharges the target battery under standard working conditions, the acquisition detection unit acquires the corresponding change relation between the temperature of the target battery and time in the discharging process and generates a first analysis image, and the first analysis image is a two-dimensional coordinate system with a horizontal axis being time and a vertical axis being the temperature of the target battery.
3. The multi-pole self-switching detection method of the energy storage battery box according to claim 2, wherein the temperature analysis unit counts the rising coefficients under the first temperature analysis condition and extracts rising time periods corresponding to the rising coefficients, and the temperature analysis unit determines a temperature control range according to the rising time periods;
if the rising time length is within a first preset rising time length range, the temperature analysis unit judges that the detected temperature of the natural heating detection corresponding to the rising time length is a first-level detected temperature;
if the rising time length is within a second preset rising time length range, the temperature analysis unit judges that the detected temperature of the natural heating detection corresponding to the rising time length is a second-level detected temperature;
if the rising time length is within a third preset rising time length range, the temperature analysis unit judges that the detected temperature of the natural heating detection corresponding to the rising time length is three-level detected temperature;
the temperature control range comprises a first temperature control range, a second temperature control range, a third temperature control range and a fourth temperature control range, wherein the numerical values in the first temperature control range are larger than the first temperature control detection temperature and smaller than or equal to the second temperature control detection temperature, the numerical values in the second temperature control range are larger than the second temperature control detection temperature and smaller than or equal to the third temperature control detection temperature, the numerical values in the third temperature control range are larger than the third temperature control detection temperature, and the numerical values in the fourth temperature control range are smaller than or equal to the first temperature control detection temperature; the first temperature control detection temperature is the average value of the sum of the first-stage detection temperatures, the second temperature control detection temperature is the average value of the sum of the second-stage detection temperatures, the third temperature control detection temperature is the average value of the sum of the third-stage detection temperatures, and the first temperature analysis condition is that the determination of the rising coefficient is completed.
4. The multi-pole self-switching detection method of the energy storage battery box according to claim 3, wherein the temperature analysis unit controls the acquisition detection unit to respectively take the intermediate value of each temperature control range as the detection temperature under the second temperature analysis condition and perform first auxiliary temperature rise detection on the target battery, and detects the battery temperature rise time length corresponding to the rising coefficient of each first auxiliary temperature rise detection;
if the battery temperature rising time length is in a first preset temperature rising range, the temperature analysis unit judges that the first auxiliary temperature rising detection is qualified and a temperature control strategy of a corresponding temperature control range is set to adopt a first auxiliary temperature rising device, and the first auxiliary temperature rising device operates at preset initial power;
if the battery temperature rising time length is in a second preset temperature rising range, the temperature analysis unit sets a temperature control strategy of a corresponding temperature control range, adopts a first auxiliary temperature rising device to raise the temperature, and increases and adjusts the operation power of the first auxiliary temperature rising device;
if the battery temperature rising time length is in a third preset temperature rising range, the temperature analysis unit judges that second auxiliary temperature rising detection is carried out aiming at the corresponding temperature control range;
The first auxiliary temperature rise detection is that the acquisition detection unit adjusts the detection temperature to be the middle value of each temperature control range and discharges the target battery under the standard working condition, the acquisition detection unit uses the first auxiliary temperature rise device to heat the target battery, the acquisition detection unit acquires the corresponding change relation between the temperature and time of the target battery in the discharge process and generates a second analysis image, and the second temperature analysis condition is that the determination of the temperature control range is completed.
5. The multi-pole self-switching detection method of an energy storage battery box according to claim 4, wherein the temperature analysis unit increases and adjusts the power of the air pump of the first auxiliary temperature rising device according to the temperature rising time of the battery under the third temperature analysis condition,
the difference value of the power increment of the air pump and the battery temperature rise duration is in positive correlation;
the third temperature analysis condition is that the temperature rise time of the battery is in a second preset temperature rise range.
6. The multi-pole self-switching detection method of the energy storage battery box according to claim 5, wherein the temperature analysis unit performs second auxiliary temperature rise detection in a corresponding temperature control range when the battery temperature rise time is within a third preset temperature rise range, wherein the first auxiliary temperature rise device of the acquisition detection unit is closed, and the second auxiliary temperature rise device is adopted to heat the target battery; the temperature analysis unit detects the battery temperature rise time length corresponding to the rising coefficient of each second auxiliary temperature rise detection;
If the battery temperature rising time length is in a first preset temperature rising range, the temperature analysis unit judges that the second auxiliary temperature rising detection is qualified and sets a temperature control strategy of a corresponding temperature control range, and a second auxiliary temperature rising device is adopted for temperature rising;
if the battery temperature rising time is in a second preset temperature rising range or a third preset temperature rising range, the temperature analysis unit sets a temperature control strategy of a corresponding temperature control range, adopts a second auxiliary temperature rising device to raise the temperature, and increases and adjusts the operating power of the second auxiliary temperature rising device.
7. The multi-pole self-switching detection method of the energy storage battery box according to claim 6, wherein the working condition analysis unit detects working condition states of the target battery under the first working condition analysis condition and determines a working condition control strategy according to the corresponding working condition reference quantity detected by each working condition state;
if the working condition reference quantity is in the first working condition reference state, the working condition analysis unit judges that the auxiliary heating device of the working condition control strategy corresponding to the current working condition switching frequency does not need to be adjusted;
if the working condition reference quantity is in the second working condition reference state, the working condition analysis unit judges that the power of the auxiliary heating device of the working condition control strategy corresponding to the current working condition switching frequency is reduced and adjusted;
If the working condition reference quantity is in the third working condition reference state, the working condition analysis unit judges that the auxiliary heating device of the working condition control strategy corresponding to the current working condition switching frequency is subjected to pause switching time setting;
the first working condition reference state is that the time length of the target battery reaching the maximum temperature is longer than the preset reference heating time length and the maximum temperature of the target battery is smaller than or equal to the preset maximum temperature, the second working condition reference state is that the time length of the target battery reaching the maximum temperature is longer than the preset reference heating time length and the maximum temperature of the target battery is greater than the preset maximum temperature, the third working condition reference state is that the time length of the target battery reaching the maximum temperature is smaller than or equal to the preset reference heating time length and the maximum temperature of the target battery is greater than the preset maximum temperature, and the first working condition analysis condition is that the temperature management and control strategies corresponding to all the temperature management and control ranges are all determined to be completed.
8. The multi-pole self-switching detection method of the energy storage battery box according to claim 7, wherein the working condition analysis unit calculates a temperature difference between the maximum temperature of the target battery and a preset maximum temperature under the second working condition analysis condition and reduces and adjusts the power of the auxiliary temperature raising device according to the temperature difference;
The reduction amount of the power of the auxiliary temperature rising device and the temperature difference value are in positive correlation;
the second working condition analysis condition is that the working condition reference quantity is in a second working condition reference state.
9. The multi-pole self-switching detection method of the energy storage battery box according to claim 8, wherein the working condition analysis unit determines the pause time of the auxiliary heating device according to the time difference between the time when the target battery reaches the maximum temperature and the preset reference heating time under the third working condition analysis condition;
the pause time of the auxiliary temperature rising device is in positive correlation with the time difference value;
the third working condition analysis condition is that the working condition reference quantity is in a third working condition reference state.
10. An energy storage battery box multipole self-switching detection device applying the detection method of any one of claims 1 to 9, characterized by comprising:
the collecting and detecting unit is used for carrying out discharge detection on the target battery, controlling the target battery to discharge at different temperatures and detecting the temperature of the target battery;
the temperature analysis unit is connected with the acquisition detection unit and used for extracting the rising time length corresponding to each rising coefficient, determining a temperature control range according to the rising time length, controlling the acquisition detection unit to take the middle value of each temperature control range as the detection temperature, performing first auxiliary heating detection on the target battery, and determining an auxiliary heating device and operating power corresponding to a temperature control strategy according to the battery heating time length corresponding to each rising coefficient in each first auxiliary heating detection;
The working condition analysis unit is connected with the acquisition detection unit and the temperature analysis unit and is used for detecting working condition states of the target battery and determining a working condition control strategy according to corresponding working condition reference quantities detected by the working condition states, and the working condition analysis unit comprises an auxiliary heating device without adjustment, power reduction adjustment of the auxiliary heating device and pause switching duration setting of the auxiliary heating device;
the display unit is connected with the acquisition and detection unit, the temperature analysis unit and the working condition analysis unit and is used for inputting initial parameter information of the acquisition and detection unit and displaying a first analysis image, a second analysis image, a temperature control strategy and a working condition control strategy; the initial parameter information comprises a preset detection temperature, a standard working condition, a preset working condition switching frequency, and a first discharging working condition and a second discharging working condition which correspond to the preset working condition switching frequency.
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