Intelligent temperature control battery system and control method

Abstract

The present invention discloses an intelligent temperature-controlled battery system and a control method, which relate to the technical field of battery temperature control. The method comprises the following steps: photographing a battery system in operation using an infrared thermal imager to obtain a charging image group and a discharging image group; analyzing the images in the charging image group and the discharging image group to obtain a charging start time, a charging end time, a discharging start time, and a discharging end time; and cooling the battery system in operation based on charging temperature control characteristics and discharging temperature control characteristics. The present invention is used to address the problem in the prior art of insufficient control over the overall heat dissipation efficiency of the battery in different environments, due to the lack of an improved method for analyzing infrared images of the battery's environment using an infrared thermal imager and setting the start and end times of the cooling system based on the analysis results.

Description

Technical Field

[0001] The present invention relates to the technical field of battery temperature control, and in particular to an intelligent temperature-controlled battery system and a control method. Background Art

[0002] The battery intelligent temperature control system is a technology that monitors and controls the battery's temperature in real time. It can effectively reduce the battery's aging rate and damage risk, and improve the battery's service life and safety. Specifically, the battery intelligent temperature control system has the following functions: 1. Reduce the battery's aging rate; 2. Improve battery safety; 3. Improve battery performance. The battery intelligent temperature control system can dynamically adjust according to the battery's operating status, so that it operates within the optimal temperature range, thereby improving the battery's performance and efficiency.

[0003] Existing improvements in intelligent temperature control for battery systems typically detect the cooling water temperature and ambient temperature to achieve temperature control. For example, Chinese patent publication number CN112886086A discloses a battery temperature control system, a battery temperature control method, a storage medium, and a vehicle. This solution achieves temperature control of the battery pack by detecting the cooling water inlet temperature, the cooling water outlet temperature, the ambient temperature, and battery pack information. Other improvements in intelligent temperature control for battery systems are typically used to improve the heat dissipation efficiency of the battery. However, existing improvements lack an improved method for analyzing infrared images of the battery environment using an infrared thermal imager and setting the start and end times of the cooling system based on the analysis results. When the battery environment is relatively dense, the heat emitted by the battery will increase the surrounding ambient temperature, making it impossible to accurately control the start and end times of the cooling system, and thus the overall heat dissipation efficiency of the battery. In view of this, it is necessary to improve the existing intelligent temperature control battery system. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems in the prior art to a certain extent. By proposing an intelligent temperature-controlled battery system and a control method, it is used to solve the problem in the prior art of lacking an improved method for analyzing infrared images of the environment in which the battery is located based on an infrared thermal imager and setting the start and end time of the cooling system based on the analysis results. When the environment in which the battery is located is relatively tight, the heat emitted by the battery will cause the surrounding ambient temperature to rise, making it impossible to accurately control the start and end time of the cooling system, resulting in insufficient regulation of the overall heat dissipation efficiency of the battery in different environments.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an intelligent temperature-controlled battery system, comprising a temperature image capturing module, a temperature image analysis module, and a battery temperature control module; the temperature image capturing module is data-connected to the temperature image analysis module, and the temperature image analysis module is data-connected to the battery temperature control module;

[0006] The temperature image shooting module is used to shoot the battery system in operation using an infrared thermal imager, and group the images obtained into a charging image group and a discharging image group respectively;

[0007] The temperature image analysis module is used to analyze the images in the charging image group and the discharging image group, and obtain the charging start time, charging end time, discharging start time, and discharging end time based on the analysis results; the charging start time and charging end time are recorded as the charging temperature control feature, and the discharging start time and discharging end time are recorded as the discharging temperature control feature;

[0008] The battery temperature control module is used to cool the battery system in operation based on the charging temperature control characteristics and the discharging temperature control characteristics.

[0009] Furthermore, the temperature image shooting module is configured with a charging image shooting strategy, which includes:

[0010] Place the battery system in an environment where it operates normally. When the battery modules in the battery system have zero charge, use an infrared thermal imager to take a picture of the battery system and its surroundings. This is recorded as the empty image. The infrared thermal imager is fixed in position, recorded as the charging shooting position, and the battery system is charged.

[0011] The total charging time of the battery system is recorded as L. After the battery system starts charging, the battery system and the surrounding environment are photographed using an infrared thermal imager at standard intervals. These images are sequentially recorded as charging images 1 to K, where the value of the standard interval time × K equals L.

[0012] The charging image 1 to the charging image K are recorded as a charging image group.

[0013] Furthermore, the temperature image shooting module is also configured with a discharge image shooting strategy, which includes:

[0014] Place the battery in an environment where it operates normally. When the battery modules in the battery system are fully charged, use an infrared thermal imager to photograph the battery system and its surroundings. This is recorded as the full-charge image. Fix the position of the infrared thermal imager, which is recorded as the discharge shooting position, and discharge the battery system.

[0015] The discharge time of the battery system is recorded as Q. After the battery system starts discharging, the battery system and the surrounding environment are photographed using an infrared thermal imager at standard intervals. These images are sequentially recorded as discharge images 1 to P, where the value of the standard interval time × P equals Q.

[0016] Discharge image 1 to discharge image P are recorded as a discharge image group.

[0017] Furthermore, the temperature image analysis module is configured with an image analysis strategy, which includes:

[0018] For any image A in the charging image group and the discharging image group, obtain the highest temperature of the battery system under the operating state, which is recorded as the maximum tolerance temperature;

[0019] When the temperature corresponding to any pixel in image A is greater than or equal to the limit temperature, image A is recorded as a heat dissipation image; when the temperature corresponding to any pixel in image A is less than the limit temperature, image A is recorded as a normal thermal image.

[0020] Furthermore, the image analysis strategy also includes:

[0021] For any charging image K1 in the charging image group, when the charging image K1 is a normal thermal image and the charging image K1+1 is an image to be cooled, the charging image K1 is recorded as a critical cooling image;

[0022] Obtain a battery system with K1 battery modules having zero charge, each battery system including a charging unit. After the K1 charging units begin charging, use a cooling system to cool the battery modules of the K1 charging units at a standard interval time × 1 to a standard interval time × K1. Use an infrared thermal imager to obtain images of the K1 battery system at a standard interval time × (K1+1) after the start of charging, and record them as test cooling image 1 to test cooling image K1, respectively.

[0023] For any test cooling image K2 from the test cooling images 1 to the test cooling image K1, the test cooling image K2 is marked as an image to be cooled or a normal thermal image; when the test cooling image K2 is a normal thermal image and the test cooling image K2+1 is an image to be cooled, the time obtained by multiplying the standard interval time by K2 is recorded as the charging start time;

[0024] A charging unit with a battery module having a charge of 0 is obtained, and a cooling system is turned on to cool the battery module at the charging start time after charging begins. After the battery module is fully charged, an infrared thermal imager is used to photograph the battery system at standard intervals, and the image obtained in each shot is marked as a heat dissipation image or a normal thermal image. The time of the first normal thermal image obtained minus the time when the battery module is fully charged is recorded as the charging end time.

[0025] Furthermore, the image analysis strategy also includes:

[0026] For any discharge image P1 in the discharge image group, when discharge image P1 is a normal thermal image and discharge image P1+1 is an image to be cooled, discharge images 1 to P1 are analyzed based on the method for obtaining the charging start time, and the time obtained by the analysis is recorded as the discharge start time;

[0027] When the discharge image P1 is the image to be cooled and the discharge image P1+1 is the normal thermal image, the time corresponding to the standard interval time × P1 is recorded as the natural cooling time; the value of the natural cooling time divided by the standard interval time is recorded as G;

[0028] The value of the natural cooling time minus the discharge start time is recorded as the cooling off interval.

[0029] Furthermore, the image analysis strategy also includes:

[0030] Obtain G battery systems with fully charged battery modules, which are respectively labeled as cold-off test system 1 to cold-off test system G;

[0031] Discharge the cold-off test system 1 to the cold-off test system G, and use the cooling system in the cold-off test system 1 to the cold-off test system G to cool the battery module when the time after the start of discharge is the discharge start time, and turn off the cooling system in the cold-off test system 1 to the cold-off test system G at the standard interval time × 1 to the standard interval time × G after the cooling system is turned on, respectively, wherein the shutdown time of the cooling system of the cold-off test system 1 is the standard interval time × 1, the shutdown time of the cooling system of the cold-off test system 2 is the standard interval time × 2, and so on;

[0032] For any one of the cold test systems G1 from the cold test system 1 to the cold test system G, after the cooling system in the cold test system G1 starts the cooling process, an infrared thermal imager is used to obtain images of the battery system at standard intervals. When the G1th image is obtained, the acquisition is stopped, and the obtained images are sequentially recorded as cold system image G1~1 to cold system image G1~G1, and the cold system image G1~1 to cold system image G1~G1 are respectively marked as images to be cooled or normal thermal images; when the cold system images G1~1 to cold system images G1~G1 contain images to be cooled, the cold test system G1 is recorded as a system that still needs cooling; when the cold system images G1~1 to cold system images G1~G1 are all recorded as normal thermal images, the cold test system G1 is recorded as a system that has been cooled;

[0033] When the cooling test system 1 to the cooling test system G contain a heat dissipated system, the closing time of the cooling system of the heat dissipated system with the smallest number is recorded as the end-of-discharge time;

[0034] When the cooling test systems 1 to G do not contain any cooling systems, the system that still needs cooling is recorded as the selectable system with the largest number of normal thermal images among all the systems that still need cooling, and the shutdown time of the cooling system of the cooling test system with the smallest number among all the selectable systems is recorded as the end discharge time.

[0035] Furthermore, the image analysis strategy also includes:

[0036] When none of the discharge images P1 is an image to be dissipated and the discharge image P1+1 is a normal thermal image, the discharge images 1 to P are analyzed based on the method for obtaining the end-of-charge time, and the obtained time is recorded as the end-of-discharge time.

[0037] Furthermore, the battery temperature control module includes:

[0038] When the battery system is being charged, the cooling system is turned on to cool the battery module after the charging starts and the charging start time has passed. The cooling system is turned off after the battery module is fully charged and the charging end time has passed.

[0039] When the battery system starts to discharge, the cooling system is turned on to cool the battery module after the discharge starts and the cooling system is turned off at the discharge end time after the cooling system starts or the discharge end time after the battery system finishes discharging.

[0040] In a second aspect, the present invention further provides an intelligent temperature-controlled battery control method, comprising:

[0041] Step S1, photographing the battery system in operation using an infrared thermal imager, and grouping the images obtained into a charging image group and a discharging image group;

[0042] Step S2, analyzing the images in the charge image group and the discharge image group, and obtaining the charge start time, charge end time, charge end time, discharge start time, and discharge end time based on the analysis results; recording the charge start time and charge end time as the charge temperature control feature, and recording the discharge start time and discharge end time as the discharge temperature control feature;

[0043] Step S3: Cooling down the battery system in operation based on the charging temperature control characteristics and the discharging temperature control characteristics.

[0044] Beneficial effects of the present invention: The present invention first uses an infrared thermal imager to shoot a battery system in operation, and groups the images obtained by shooting into charging image groups and discharging image groups respectively, and then analyzes the images in the charging image group and the discharging image group, and obtains the charging start time, charging end time, charging end time, discharge start time and discharge end time based on the analysis results, and finally performs cooling treatment on the battery system in operation based on the charging temperature control characteristics and the discharge temperature control characteristics. The advantage of this is that by obtaining the charging image group and the discharge image group, the temperature changes of the battery and the surrounding environment during charging and discharging can be obtained, thereby providing data support for subsequent analysis, and by analyzing and obtaining the charging temperature control characteristics and the discharge temperature control characteristics, the optimal opening time and the optimal closing time of the cooling system during charging and discharging of the battery can be obtained under the condition that the battery is fully cooled, thereby fully cooling the batteries in different environments without wasting resources, accurately controlling the switches of the battery system, and improving the overall heat dissipation efficiency of the battery.

[0045] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or understood by practicing the present application. The purposes and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 1. It is a flow chart of the steps and principles of the method of the present invention;

[0047] Figure 2 It is a principle block diagram of the system of the present invention;

[0048] Figure 3 A schematic diagram of obtaining a heat dissipation critical image according to the present invention;

[0049] Figure 4 Schematic diagram of obtaining the end-of-discharge time of the present invention. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] Example 1

[0052] See also Figure 1 As shown, in the first embodiment, the present application provides an intelligent temperature-controlled battery control method, comprising:

[0053] In step S1 , the battery system in operation is photographed using an infrared thermal imager, and the photographed images are grouped and recorded as a charging image group and a discharging image group.

[0054] Step S1 includes: step S101, placing the battery system in an environment in which it is located during normal operation, and when the power of the battery module in the battery system is 0, using an infrared thermal imager to shoot the battery system and the surrounding environment, recording it as an empty film image, fixing the position of the infrared thermal imager, recording it as a charging shooting position, and charging the battery system; by obtaining the empty film image, an infrared image of the battery and the surrounding environment without being affected by the battery can be obtained, which is helpful for subsequent analysis.

[0055] In this embodiment, after the charging shooting position is acquired, all images shot during the subsequent battery charging process are shot at the charging shooting position, thereby ensuring that the objects and orientations in all images are consistent.

[0056] In step S102 , the total charging time of the battery system is recorded as L. After the battery system begins charging, the battery system and its surrounding environment are photographed using an infrared thermal imager at standard intervals. These images are sequentially recorded as charging images 1 to K, where the value of the standard interval multiplied by K equals L.

[0057] During the specific implementation process, the value of K can be set according to the charging time of the battery system. When the charging time of the battery system is long, the value of K can be increased; when the charging time of the battery system is short, the value of K can be reduced. In this embodiment, the value of K is set to 5. After obtaining the total charging time L of the battery system, the value of the standard interval time can be determined. For example, if the total charging time L of the battery system is 50 minutes, the standard interval time is 10 minutes.

[0058] In step S103 , charging image 1 to charging image K are recorded as a charging image group.

[0059] In step S104, the temperature image capturing module is further configured with a discharge image capturing strategy, which includes:

[0060] In step S105, the battery is placed in an environment in which it is normally operated. When the battery modules in the battery system are fully charged, an infrared thermal imager is used to photograph the battery system and the surrounding environment, which is recorded as a full-time image. The position of the infrared thermal imager is fixed, which is recorded as a discharge shooting position, and the battery system is discharged.

[0061] In step S106, the discharge time of the battery system is recorded as Q. After the battery system starts discharging, the battery system and the surrounding environment are photographed using an infrared thermal imager at standard intervals, and the images are recorded in sequence as discharge images 1 to P. The value of the standard interval multiplied by P equals Q. The method for determining the value of P is consistent with the method for determining the value of K. In this embodiment, the value of P is set to 5.

[0062] In step S107 , discharge image 1 to discharge image P are recorded as a discharge image group.

[0063] Step S2, analyzing the images in the charging image group and the discharging image group, and obtaining the charging start time, charging end time, charging end time, discharging start time, and discharging end time based on the analysis results; recording the charging start time and charging end time as charging temperature control characteristics, and recording the discharging start time and discharging end time as discharge temperature control characteristics.

[0064] Step S2 includes: Step S201, for any image A in the charging image group and the discharging image group, obtaining the highest temperature of the battery system under the operating state, and recording it as the limit tolerance temperature.

[0065] In step S202 , when the temperature corresponding to any pixel in image A is greater than or equal to the limit temperature, image A is recorded as an image to be cooled; when the temperature corresponding to any pixel in image A is less than the limit temperature, image A is recorded as a normal thermal image.

[0066] In step S203 , for any charging image K1 in the charging image group, when the charging image K1 is a normal thermal image and the charging image K1+1 is an image to be cooled, the charging image K1 is recorded as a cooling critical image.

[0067] See also Figure 3 As shown, WW1 to WWK are charging image groups, WW1 to WW3 are normal thermal images, and WW4 is an image to be cooled. Then, WW4 is recorded as a cooling critical image.

[0068] Step S204, obtaining a battery system in which the power level of K1 battery modules is 0, each battery system includes a charging unit, and after the K1 charging units start charging, the battery modules of the K1 charging units are cooled by the cooling system at a standard interval time × 1 to a standard interval time × K1, and an infrared thermal imager is used to obtain images of the K1 battery system at a standard interval time × (K1+1) after the start of charging, which are recorded as test cooling image 1 to test cooling image K1 respectively; in the above processing of the K1 battery modules, after the K1 charging units start charging, the battery modules of the K1 charging units are cooled by the cooling system at a standard interval time × 1 to a standard interval time × K1, specifically: for example, if the standard interval time is 5 minutes, for the first charging unit, cooling is performed 5 minutes after the start of charging, for the second charging unit, cooling is performed 10 minutes after the start of charging, and so on, and for the K1 charging unit, cooling is performed K1×5 minutes after the start of charging.

[0069] Step S205: For any test cooling image K2 from the test cooling image 1 to the test cooling image K1, mark the test cooling image K2 as an image to be cooled or a normal thermal image; when the test cooling image K2 is a normal thermal image and the test cooling image K2+1 is an image to be cooled, the time obtained by multiplying the standard interval time by K2 is recorded as the charging start time; when there are multiple cooling images from the test cooling image 1 to the test cooling image K1 that meet the above conditions, select the charging start time of any cooling image that meets the above conditions for subsequent analysis.

[0070] A charging unit with a battery module having a charge of 0 is obtained, and a cooling system is turned on to cool the battery module at the charging start time after charging begins. After the battery module is fully charged, an infrared thermal imager is used to photograph the battery system at standard intervals, and the image obtained in each shot is marked as a heat dissipation image or a normal thermal image. The time of the first normal thermal image obtained minus the time when the battery module is fully charged is recorded as the charging end time.

[0071] The charging start time and charging end time are recorded as charging temperature control characteristics.

[0072] In step S206 , for any discharge image P1 in the discharge image group, when the discharge image P1 is a normal thermal image and the discharge image P1+1 is an image to be cooled, the discharge images 1 to P1 are analyzed based on the method for obtaining the charging start time, and the analyzed time is recorded as the discharge start time.

[0073] When the discharge image P1 is an image to be cooled and the discharge image P1+1 is a normal thermal image, the time corresponding to the standard interval time × P1 is recorded as the natural cooling time; the value of the natural cooling time divided by the standard interval time is recorded as G; generally, the heat generated when the battery is discharged is less than the heat generated when the battery is charged. Therefore, when the cooling system is used, the heat generated by the battery system may recover to below the maximum tolerance temperature before the battery is exhausted. Therefore, the situation when the discharge image P1 is an image to be cooled and the discharge image P1+1 is a normal thermal image should be analyzed; the value of the natural cooling time minus the discharge start time is recorded as the cooling shutdown interval.

[0074] Step S207 , obtaining G battery systems with fully charged battery modules, which are respectively recorded as cold-off test system 1 to cold-off test system G.

[0075] The cold-shutdown test systems 1 to the cold-shutdown test systems G are discharged, and when the time after the start of discharge is the discharge start time, the cooling systems in the cold-shutdown test systems 1 to the cold-shutdown test systems G are used to cool the battery modules, and the cooling systems in the cold-shutdown test systems 1 to the cold-shutdown test systems G are turned off at the standard interval time × 1 to the standard interval time × G after the cooling systems are turned on, respectively. Among them, the turning-off time of the cooling system of the cold-shutdown test system 1 is the standard interval time × 1, the turning-off time of the cooling system of the cold-shutdown test system 2 is the standard interval time × 2, and so on.

[0076] For any one of the cold test systems G1 from the cold test system 1 to the cold test system G, after the cooling system in the cold test system G1 starts the cooling process, an infrared thermal imager is used to obtain images of the battery system at standard intervals. When the G1th image is obtained, the acquisition is stopped, and the obtained images are sequentially recorded as cold system image G1~1 to cold system image G1~G1, and the cold system image G1~1 to cold system image G1~G1 are respectively marked as images to be cooled or normal thermal images; when the cold system images G1~1 to cold system images G1~G1 contain images to be cooled, the cold test system G1 is recorded as a system that still needs cooling; when the cold system images G1~1 to cold system images G1~G1 are all recorded as normal thermal images, the cold test system G1 is recorded as a system that has been cooled.

[0077] Step S208: When the cooling test system 1 to the cooling test system G contain a heat dissipation system, the closing time of the cooling system of the heat dissipation system with the smallest number is recorded as the discharge end time; in one data processing, four cooling test systems are obtained through analysis, see Figure 4As shown, AA1 to AA4 are the four images corresponding to the cooling test system 1; AA5 to AA8 are the four images corresponding to the cooling test system 2; AA9 to AA12 are the four images corresponding to the cooling test system 3; AA13 to AA16 are the four images corresponding to the cooling test system 4; in AA1 to AA4, AA1 to AA3 are images to be dissipated, and AA4 is a normal thermal image; in AA5 to AA8, AA5 and AA6 are images to be dissipated, and AA7 and AA8 are normal thermal images; in AA9 to AA12, AA9 to AA12 are all normal thermal images; in AA13 to AA16, AA13 to AA16 are all normal thermal images. Then, through analysis, it can be obtained that the closing time of the cooling system of the cooling test system 3 is recorded as the end-of-discharge time; by obtaining the closing time of the cooling system of the cooling test system with the smallest number, the earliest time when the cooling system can be closed can be obtained, thereby reducing the opening time of the cooling system and saving resources.

[0078] When the cooling test systems 1 to G do not contain any cooling systems, the system that still needs cooling with the largest number of normal thermal images among all the systems that still need cooling is recorded as the selectable system, and the shutdown time of the cooling system of the cooling test system with the smallest number among all the selectable systems is recorded as the end-of-discharge time; among them, there may be multiple systems that still need cooling with the largest number of normal thermal images among all the systems that still need cooling, so the shutdown time of the cooling system of the cooling test system with the smallest number should be selected and recorded as the end-of-discharge time.

[0079] In step S209, when none of the discharge images P1 is an image to be cooled and the discharge image P1+1 is a normal thermal image, the discharge images 1 to P are analyzed based on the method for obtaining the end-of-charge time, and the obtained time is recorded as the end-of-charge time; the discharge start time and the discharge end time are recorded as the discharge temperature control feature.

[0080] Step S3: Cooling down the battery system in operation based on the charging temperature control characteristics and the discharging temperature control characteristics.

[0081] Step S3 includes: when charging the battery system, starting the cooling system to cool the battery module after the charging starts and the charging start time, and shutting down the cooling system after the battery module is fully charged and the charging end time.

[0082] When the battery system starts to discharge, the cooling system is turned on to cool the battery module after the discharge starts and the cooling system is turned off at the discharge end time after the cooling system starts or the discharge end time after the battery system finishes discharging.

[0083] Example 2

[0084] See also Figure 2 As shown, in the second embodiment, the present invention provides an intelligent temperature control battery system, including a temperature image shooting module, a temperature image analysis module and a battery temperature control module; the temperature image shooting module is data-connected to the temperature image analysis module, and the temperature image analysis module is data-connected to the battery temperature control module.

[0085] The temperature image shooting module is used to shoot the battery system in operation using an infrared thermal imager, and group the images obtained into a charging image group and a discharging image group.

[0086] The temperature image capture module is equipped with a charging image capture strategy, which includes:

[0087] Place the battery system in an environment where it operates normally. When the power level of the battery modules in the battery system is 0, use an infrared thermal imager to photograph the battery system and the surrounding environment. This is recorded as the empty image. Fix the position of the infrared thermal imager as the charging shooting position and charge the battery system.

[0088] The total charging time of the battery system is recorded as L. After the battery system starts charging, the battery system and the surrounding environment are photographed using an infrared thermal imager at standard intervals. These images are recorded in sequence as charging image 1 to charging image K, where the value of the standard interval time × K equals L.

[0089] The charging image 1 to the charging image K are recorded as a charging image group.

[0090] The temperature image capture module is also equipped with a discharge image capture strategy, which includes:

[0091] Place the battery in an environment where it operates normally. When the battery modules in the battery system are fully charged, use an infrared thermal imager to photograph the battery system and the surrounding environment. This is recorded as the full-time image. Fix the position of the infrared thermal imager, which is recorded as the discharge shooting position, and discharge the battery system.

[0092] The discharge time of the battery system is recorded as Q. After the battery system starts discharging, the battery system and the surrounding environment are photographed using an infrared thermal imager at standard intervals. These images are recorded in sequence as discharge image 1 to discharge image P, where the value of the standard interval time × P equals Q.

[0093] Discharge image 1 to discharge image P are recorded as a discharge image group.

[0094] The temperature image analysis module is used to analyze the images in the charging image group and the discharging image group, and obtain the charging start time, charging end time, discharging start time and discharging end time based on the analysis results; the charging start time and charging end time are recorded as the charging temperature control characteristics, and the discharging start time and discharging end time are recorded as the discharge temperature control characteristics.

[0095] The temperature image analysis module is configured with an image analysis strategy, which includes:

[0096] For any image A in the charging image group and the discharging image group, the highest temperature of the battery system under the operating state is obtained and recorded as the limit withstand temperature.

[0097] When the temperature corresponding to any pixel in image A is greater than or equal to the limit temperature, image A is recorded as a heat dissipation image; when the temperature corresponding to any pixel in image A is less than the limit temperature, image A is recorded as a normal thermal image.

[0098] Image analysis strategies also include:

[0099] For any charging image K1 in the charging image group, when the charging image K1 is a normal thermal image and the charging image K1+1 is an image to be cooled, the charging image K1 is recorded as a critical cooling image.

[0100] A battery system with K1 battery modules having a power of 0 is obtained, where each battery system includes a charging unit. After the K1 charging units start charging, the battery modules of the K1 charging units are cooled using a cooling system at a standard interval time × 1 to a standard interval time × K1. An infrared thermal imager is used to obtain images of the K1 battery system at a standard interval time × (K1+1) after the start of charging, which are recorded as test cooling image 1 to test cooling image K1, respectively.

[0101] For any test cooling image K2 from the test cooling image 1 to the test cooling image K1, the test cooling image K2 is marked as an image to be cooled or a normal thermal image; when the test cooling image K2 is a normal thermal image and the test cooling image K2+1 is an image to be cooled, the time obtained by multiplying the standard interval time by K2 is recorded as the charging start time.

[0102] A charging unit with a battery module having a charge of 0 is obtained, and a cooling system is turned on to cool the battery module at the charging start time after charging begins. After the battery module is fully charged, an infrared thermal imager is used to photograph the battery system at standard intervals, and the image obtained in each shot is marked as a heat dissipation image or a normal thermal image. The time of the first normal thermal image obtained minus the time when the battery module is fully charged is recorded as the charging end time.

[0103] Image analysis strategies also include:

[0104] For any discharge image P1 in the discharge image group, when the discharge image P1 is a normal thermal image and the discharge image P1+1 is an image to be cooled, the discharge images 1 to P1 are analyzed based on the method for obtaining the charging start time, and the time obtained by the analysis is recorded as the discharge start time.

[0105] When the discharge image P1 is the image to be cooled and the discharge image P1+1 is the normal thermal image, the time corresponding to the standard interval time × P1 is recorded as the natural cooling time; the value of the natural cooling time divided by the standard interval time is recorded as G.

[0106] The value of the natural cooling time minus the discharge start time is recorded as the cooling off interval.

[0107] Image analysis strategies also include:

[0108] A battery system with G battery modules fully charged is obtained, and they are respectively recorded as a cold-off test system 1 to a cold-off test system G.

[0109] The cold-shutdown test systems 1 to the cold-shutdown test systems G are discharged, and when the time after the start of discharge is the discharge start time, the cooling systems in the cold-shutdown test systems 1 to the cold-shutdown test systems G are used to cool the battery modules, and the cooling systems in the cold-shutdown test systems 1 to the cold-shutdown test systems G are turned off at the standard interval time × 1 to the standard interval time × G after the cooling systems are turned on, respectively. Among them, the turning-off time of the cooling system of the cold-shutdown test system 1 is the standard interval time × 1, the turning-off time of the cooling system of the cold-shutdown test system 2 is the standard interval time × 2, and so on.

[0110] For any one of the cold test systems G1 from the cold test system 1 to the cold test system G, after the cooling system in the cold test system G1 starts the cooling process, an infrared thermal imager is used to obtain images of the battery system at standard intervals. When the G1th image is obtained, the acquisition is stopped, and the obtained images are sequentially recorded as cold system image G1~1 to cold system image G1~G1, and the cold system image G1~1 to cold system image G1~G1 are respectively marked as images to be cooled or normal thermal images; when the cold system images G1~1 to cold system images G1~G1 contain images to be cooled, the cold test system G1 is recorded as a system that still needs cooling; when the cold system images G1~1 to cold system images G1~G1 are all recorded as normal thermal images, the cold test system G1 is recorded as a system that has been cooled;

[0111] When the cooling test systems 1 to G contain a heat dissipated system, the closing time of the cooling system of the heat dissipated system with the smallest number is recorded as the end-of-discharge time.

[0112] When the cooling test systems 1 to G do not contain any cooling systems, the system that still needs cooling is recorded as the selectable system with the largest number of normal thermal images among all the systems that still need cooling, and the shutdown time of the cooling system of the cooling test system with the smallest number among all the selectable systems is recorded as the end discharge time.

[0113] Image analysis strategies also include:

[0114] When none of the discharge images P1 is an image to be dissipated and the discharge image P1+1 is a normal thermal image, the discharge images 1 to P are analyzed based on the method for obtaining the end-of-charge time, and the obtained time is recorded as the end-of-discharge time.

[0115] The battery temperature control module is used to cool the battery system in operation based on the charging temperature control characteristics and the discharging temperature control characteristics.

[0116] The battery temperature control module includes:

[0117] When the battery system is being charged, the cooling system is turned on to cool the battery module after the charging starts and the charging start time has passed. The cooling system is turned off after the battery module is fully charged and the charging end time has passed.

[0118] When the battery system starts to discharge, the cooling system is turned on to cool the battery module after the discharge starts and the cooling system is turned off at the discharge end time after the cooling system starts or the discharge end time after the battery system finishes discharging.

[0119] Working principle: The present invention first uses an infrared thermal imager to shoot the battery system in a running state, and groups the images obtained, recording them as a charging image group and a discharging image group respectively. Then, the images in the charging image group and the discharging image group are analyzed, and the charging start time, charging end time, charging end time, discharge start time and discharge end time are obtained based on the analysis results. Finally, the battery system in the running state is cooled down based on the charging temperature control characteristics and the discharge temperature control characteristics.

[0120] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0121] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media containing computer-usable program code. The storage medium may be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0122] In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interface, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

Claims

1. Intelligent temperature control battery system, characterized in that: It includes a temperature image shooting module, a temperature image analysis module and a battery temperature control module; the temperature image shooting module is data-connected to the temperature image analysis module, and the temperature image analysis module is data-connected to the battery temperature control module; The temperature image shooting module is used to shoot the battery system in operation using an infrared thermal imager, and group the images obtained into a charging image group and a discharging image group respectively; The temperature image analysis module is used to analyze the images in the charging image group and the discharging image group, and obtain the charging start time, charging end time, discharging start time, and discharging end time based on the analysis results; the charging start time and charging end time are recorded as the charging temperature control feature, and the discharging start time and discharging end time are recorded as the discharging temperature control feature; The temperature image analysis module is configured with an image analysis strategy, which includes: For any image A in the charging image group and the discharging image group, obtain the highest temperature of the battery system under the operating state, which is recorded as the extreme tolerance temperature; When the temperature corresponding to any pixel in image A is greater than or equal to the limit temperature, image A is recorded as a heat dissipation image; when the temperature corresponding to any pixel in image A is less than the limit temperature, image A is recorded as a normal thermal image. The image analysis strategy also includes: For any charging image K1 in the charging image group, when the charging image K1 is a normal thermal image and the charging image K1+1 is an image to be cooled, the charging image K1 is recorded as a critical cooling image; Obtain a battery system with K1 battery modules having a charge of 0, each battery system including a charging unit. After the K1 charging units begin charging, use a cooling system to cool the battery modules of the K1 charging units at a standard interval time × 1 to a standard interval time × K1. Use an infrared thermal imager to obtain images of the K1 battery system at a standard interval time × (K1+1) after the start of charging, and record them as test cooling image 1 to test cooling image K1, respectively. For any test cooling image K2 from the test cooling images 1 to the test cooling image K1, the test cooling image K2 is marked as an image to be cooled or a normal thermal image; when the test cooling image K2 is a normal thermal image and the test cooling image K2+1 is an image to be cooled, the time obtained by multiplying the standard interval time by K2 is recorded as the charging start time; Obtain a charging unit with a battery module at zero charge, and activate the cooling system at the charging start time after charging begins to cool the battery module. After the battery module is fully charged, use an infrared thermal imager to photograph the battery system at standard intervals. Mark each captured image as a heat dissipation image or a normal thermal image. Subtract the time when the battery module is fully charged from the time of the first normal thermal image obtained as the charging end time. The image analysis strategy also includes: For any discharge image P1 in the discharge image group, when discharge image P1 is a normal thermal image and discharge image P1+1 is an image to be cooled, based on the acquisition of the charging start time, discharge images 1 to P1 are analyzed, and the time obtained by the analysis is recorded as the discharge start time; When the discharge image P1 is the image to be cooled and the discharge image P1+1 is the normal thermal image, the time corresponding to the standard interval time × P1 is recorded as the natural cooling time; the value of the natural cooling time divided by the standard interval time is recorded as G; The value of the natural cooling time minus the discharge start time is recorded as the cooling off interval; The image analysis strategy also includes: Obtain G battery systems with fully charged battery modules, which are respectively labeled as cold-off test system 1 to cold-off test system G; Discharge the cold-off test system 1 to the cold-off test system G, and use the cooling system in the cold-off test system 1 to the cold-off test system G to cool the battery module when the time after the start of discharge is the discharge start time, and turn off the cooling system in the cold-off test system 1 to the cold-off test system G at the standard interval time × 1 to the standard interval time × G after the cooling system is turned on, respectively, wherein the shutdown time of the cooling system of the cold-off test system 1 is the standard interval time × 1, the shutdown time of the cooling system of the cold-off test system 2 is the standard interval time × 2, and so on; For any one of the cold test systems G1 from the cold test system 1 to the cold test system G, after the cooling system in the cold test system G1 starts the cooling process, an infrared thermal imager is used to obtain images of the battery system at standard intervals. When the G1th image is obtained, the acquisition is stopped, and the obtained images are sequentially recorded as cold system images G1~1 to cold system images G1~G1, and the cold system images G1~1 to cold system images G1~G1 are respectively marked as images to be cooled or normal thermal images; when the cold system images G1~1 to cold system images G1~G1 contain images to be cooled, the cold test system G1 is recorded as a system that still needs cooling; when the cold system images G1~1 to cold system images G1~G1 are all recorded as normal thermal images, the cold test system G1 is recorded as a system that has cooled; When the cooling test system 1 to the cooling test system G contain a heat dissipated system, the closing time of the cooling system of the heat dissipated system with the smallest number is recorded as the end-of-discharge time; When the cooling test systems 1 to G do not contain any cooling systems, the system that still needs cooling is recorded as the selectable system with the largest number of normal thermal images among all the systems that still need cooling, and the cooling system shutdown time of the cooling test system with the smallest number among all the selectable systems is recorded as the discharge end time; The image analysis strategy also includes: When none of the discharge images 1 to P is an image to be cooled and the discharge image P1+1 is a normal thermal image, the discharge images 1 to P are analyzed based on the acquisition of the end-of-charge time, and the obtained time is recorded as the end-of-discharge time. The battery temperature control module is used to cool the battery system in operation based on the charging temperature control characteristics and the discharging temperature control characteristics; The battery temperature control module includes: When the battery system is being charged, the cooling system is turned on to cool the battery module after the charging starts and the charging start time has passed. The cooling system is turned off after the battery module is fully charged and the charging end time has passed. When the battery system starts to discharge, the cooling system is turned on to cool the battery module after the discharge starts and the cooling system is turned off at the discharge end time after the cooling system starts or the discharge end time after the battery system finishes discharging.

2. The intelligent temperature control battery system according to claim 1, characterized in that: The temperature image shooting module is configured with a charging image shooting strategy, which includes: The battery system is placed in an environment in which it operates normally. When the power level of the battery modules in the battery system is zero, an infrared thermal imager is used to photograph the battery system and the surrounding environment, which is recorded as an empty image. The position of the infrared thermal imager is fixed, which is recorded as a charging shooting position, and the battery system is charged. The battery system includes a battery module and a cooling system. The total charging time of the battery system is recorded as L. After the battery system starts charging, the battery system and the surrounding environment are photographed using an infrared thermal imager at standard intervals. These images are sequentially recorded as charging images 1 to K, where the value of the standard interval time × K equals L. The charging image 1 to the charging image K are recorded as a charging image group.

3. The intelligent temperature control battery system according to claim 2, characterized in that: The temperature image shooting module is also configured with a discharge image shooting strategy, which includes: Place the battery in an environment where it operates normally. When the battery modules in the battery system are fully charged, use an infrared thermal imager to photograph the battery system and its surroundings. This is recorded as the full-charge image. Fix the position of the infrared thermal imager, which is recorded as the discharge shooting position, and discharge the battery system. The discharge time of the battery system is recorded as Q. After the battery system starts discharging, the battery system and the surrounding environment are photographed using an infrared thermal imager at standard intervals. These images are sequentially recorded as discharge images 1 to P, where the value of the standard interval time × P equals Q. Discharge image 1 to discharge image P are recorded as a discharge image group.

4. An intelligent temperature-controlled battery control method, implemented based on the intelligent temperature-controlled battery system according to any one of claims 1 to 3, characterized in that: include: Step S1, photographing the battery system in operation using an infrared thermal imager, and grouping the images obtained into a charging image group and a discharging image group; Step S2, analyzing the images in the charging image group and the discharging image group, and obtaining the charging start time, charging end time, charging end time, discharging start time, and discharging end time based on the analysis results; The charge start time and the charge end time are recorded as the charge temperature control feature, and the discharge start time and the discharge end time are recorded as the discharge temperature control feature; Step S3: Cooling down the battery system in operation based on the charging temperature control characteristics and the discharging temperature control characteristics.

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