CN111890938A - Battery management method, system, medium, battery, and electric vehicle - Google Patents

Battery management method, system, medium, battery, and electric vehicle Download PDF

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Publication number
CN111890938A
CN111890938A CN202010763533.0A CN202010763533A CN111890938A CN 111890938 A CN111890938 A CN 111890938A CN 202010763533 A CN202010763533 A CN 202010763533A CN 111890938 A CN111890938 A CN 111890938A
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temperature
battery
preset
determining
abnormal
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刘经财
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Beijing Qisheng Technology Co Ltd
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Beijing Qisheng Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/45—Control or actuating devices therefor
    • B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/46—Vehicles with auxiliary ad-on propulsions, e.g. add-on electric motor kits for bicycles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Embodiments of the present disclosure provide a battery management method, system, medium, battery, and electric vehicle. The method comprises the following steps: the temperature detection is carried out on the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery, the temperature detection devices are located at different preset positions of the battery and used for detecting the temperature of the preset positions, and whether the service condition of the battery is abnormal or not is determined according to the temperature distribution information. The method of the embodiment of the disclosure improves the reliability and accuracy of battery temperature detection and improves the battery management effect.

Description

Battery management method, system, medium, battery, and electric vehicle
Technical Field
Embodiments of the present disclosure relate to computer technologies, and in particular, to a battery management method, system, medium, battery, and electric vehicle.
Background
The BATTERY management system (BATTERY MANAGEMENT SYSTEM, referred to as BMS system for short) is used for managing the BATTERY and preventing the BATTERY from malfunctioning.
Because the temperature is one of the important parameters for normal operation of the battery, the temperature of the battery needs to be detected in the battery management system, and the battery is managed based on the detected temperature, so that the damage to the battery caused by overhigh or overlow temperature is avoided.
In the existing battery management mode, the temperature of the battery is detected through a single temperature probe, so that the problem of low reliability of battery temperature detection exists, and the battery management effect is poor.
Disclosure of Invention
The embodiment of the disclosure provides a battery management method, a battery management system, a medium, a battery and an electric vehicle, which are used for solving the problem that the battery management effect is poor due to low reliability of battery temperature detection.
In a first aspect, an embodiment of the present disclosure provides a battery management method, including:
the method comprises the steps that temperature detection is carried out on a battery through a plurality of preset temperature detection devices to obtain temperature distribution information of the battery, and the plurality of temperature detection devices are located at different preset positions of the battery and are used for detecting the temperature of the preset positions;
and determining whether the service condition of the battery is abnormal or not according to the temperature distribution information.
In a second aspect, an embodiment of the present disclosure provides a battery management system, including:
the detection unit is used for detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery, and the plurality of temperature detection devices are located at different preset positions of the battery and are used for detecting the temperature of the preset positions; and
and the determining unit is used for determining whether the use condition of the battery is abnormal or not according to the temperature distribution information.
In a third aspect, an embodiment of the present disclosure provides a battery management system, including:
a memory and a processor;
the memory is to store program instructions;
the processor is configured to invoke program instructions in the memory to perform the method according to the first aspect.
In a fourth aspect, embodiments of the present disclosure provide a battery, including:
the battery pack, the plurality of temperature detection devices, and the battery management system according to the second or third aspect are managed.
In a fifth aspect, embodiments of the present disclosure provide an electric vehicle including a battery as described in the fourth aspect above.
In a sixth aspect, embodiments of the present disclosure provide a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method according to the first aspect as described above.
In a seventh aspect, embodiments of the present disclosure provide a program product comprising a computer program that, when executed by a processor, implements the method as described in the first aspect above.
According to the battery management method, the battery management system, the battery management medium, the battery and the electric vehicle, temperature detection is carried out on the battery through the plurality of temperature detection devices located at different positions of the battery, temperature distribution information of the battery is obtained, whether the use condition of the battery is abnormal or not is determined according to the temperature distribution information, and therefore the temperature of the battery at different positions is detected through the plurality of temperature detection devices, not only is the reliability of the temperature detection of the battery improved, but also the condition that the temperatures of the battery at different positions are different is fully considered, the accuracy of the temperature detection of the battery is improved, the accuracy of judgment of the use condition of the battery is further improved, and the battery management effect is improved.
Various possible embodiments of the present disclosure and technical advantages thereof will be described in detail below.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic view of an application scenario of an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of a battery management method according to an embodiment of the present disclosure;
FIG. 3 is a diagram illustrating a location distribution of a temperature detecting device according to an embodiment of the disclosure;
fig. 4 is a schematic flow chart of a battery management method according to another embodiment of the present disclosure;
fig. 5 is a schematic flow chart of a battery management method according to another embodiment of the present disclosure;
fig. 6 is a schematic flow chart of a battery management method according to another embodiment of the present disclosure;
fig. 7 is a schematic flow chart of a battery management method according to another embodiment of the disclosure;
fig. 8 is a schematic flow chart of a battery management method according to another embodiment of the disclosure;
fig. 9 is a schematic flow chart of a battery management method according to another embodiment of the present disclosure;
fig. 10 is a schematic flow chart of a battery management method according to another embodiment of the disclosure;
fig. 11 is a schematic structural diagram of a battery management system provided in an embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of a battery management system according to another embodiment of the present disclosure;
fig. 13 is a schematic structural diagram of a battery provided in an embodiment of the present disclosure.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of systems and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
To enable those skilled in the art to better understand the embodiments of the present disclosure, the terms referred to in the embodiments of the present disclosure are explained first:
a battery: the battery pack comprises a battery pack consisting of a plurality of battery cells and is used for providing electric energy for equipment where the battery is located.
In electronic devices, for example, electric vehicles such as electric bicycles and electric automobiles are generally provided with a battery and a battery management system for managing the battery. The battery management system is used for detecting parameters such as voltage, current and temperature of the battery in real time and performing battery management based on the parameters so as to improve the safety of the electric vehicle.
The existing battery management mode is generally provided with a single temperature probe to detect the temperature of the battery, and the inventor finds that the existing mode has the main problems that: firstly, the temperature detection of the battery excessively depends on the temperature probe, and if the temperature probe fails, the accurate battery temperature cannot be detected; secondly, for the battery that includes a plurality of electric cores, because radiating nonconformity, the temperature of battery different positions department is different, even this temperature probe does not become invalid, also can't detect accurate battery temperature. Due to the problem of low reliability and accuracy of temperature detection, the battery management effect of the battery management method needs to be improved.
In the embodiment of the disclosure, a plurality of temperature detection devices are preset at different preset positions of a battery, the temperature detection devices detect the temperatures of the preset positions to obtain the temperature distribution information of the battery, and whether the use condition of the battery is abnormal is determined based on the temperature distribution information of the battery, so that the temperature detection is performed on different positions of the battery through the plurality of temperature detection devices, the excessive dependence on a single temperature detection device in the management of the battery is avoided, the reliability and the accuracy of the temperature detection of the battery are improved, and the management effect of the battery is further improved.
The battery management method provided by the embodiment of the disclosure may be applied to an application scenario shown in fig. 1, where the application scenario includes an electronic device disposed in a battery 101, and in fig. 1, the electronic device is taken as an electric vehicle, such as a shared electric bicycle, and the battery 101 may provide electric energy for an electric device on the electric vehicle and provide traction power for the electric vehicle. A temperature detection device is disposed in the battery 101 for detecting the temperature of the battery 101, and the detected temperature can be sent to a corresponding battery management system, so that the battery management system performs battery management on the battery 101.
The following describes technical solutions of embodiments of the present disclosure and how to solve the above technical problems in detail with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present disclosure will be described below with reference to the accompanying drawings.
Fig. 2 is a schematic flow chart of a battery management method according to an embodiment of the disclosure. As shown in fig. 2, the method includes:
s201, detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery, wherein the plurality of temperature detection devices are located at different preset positions of the battery and used for detecting the temperature of the preset positions.
Specifically, a plurality of temperature detection devices are arranged at different preset positions of the battery, and each temperature detection device detects the temperature of the preset position where the temperature detection device is located. One or more temperature detection devices can be arranged at one preset position to reduce the degree of dependence on a single temperature detection device, and the temperature distribution information of the battery comprises the temperature detected by each temperature detection device and the preset position of each temperature detection device.
In one possible embodiment, the temperature sensing device is a temperature probe to provide a degree of convenience in positioning the temperature sensing device within the battery.
And S202, determining whether the service condition of the battery is abnormal or not according to the temperature distribution information.
Specifically, after the temperature distribution information of the battery is obtained, the temperature of each preset position in the battery can be obtained according to the temperature detected by each temperature detection device in the temperature distribution information and the preset position where each temperature detection device is located, whether the temperature of the battery is abnormal or not can be determined according to the temperature of each preset position of the battery, and if the temperature of the battery is abnormal, the abnormal use condition of the battery is determined. Wherein the type of temperature anomaly comprises one or more of: the high temperature abnormality, the low temperature abnormality and the temperature distribution abnormality can be compared by setting corresponding temperature threshold values and temperature distribution information to determine whether the battery has the temperature abnormality.
According to the battery management method, the temperature detection is carried out on different positions of the battery through the plurality of temperature detection devices to obtain the temperature distribution information of the battery, and whether the use condition of the battery is abnormal or not is determined according to the temperature distribution information of the battery, so that the dependence degree on a single temperature detection device is reduced, the reliability and the accuracy of the temperature detection are improved, and the battery management effect is further improved.
In one possible embodiment, the temperature detecting devices may be uniformly distributed on one or more planes of the electric core pack to improve the accuracy of the temperature detection of the battery, considering that the temperatures of different planes of the electric core pack in the battery are different and the temperatures of different positions on the same plane are also different. The plane of the electric core group comprises all side surfaces of the electric core group, such as the upper side surface and the lower side surface of the electric core group, and the orientation can be determined according to the actual arrangement condition of the batteries without limitation.
In one possible embodiment, the distribution scheme of the positions of the temperature detection devices on the plane of the electric core group comprises: at least one temperature detection device is arranged in the center of the electric core group. Wherein, the center of the electric core group is the center of the electric core group plane.
Specifically, on the electric core group, the heat dissipation of different preset positions where the temperature detection device is located is inconsistent, and the closer to the center of the battery, the higher the temperature of the preset position is, the higher the heat island effect is presented. Therefore, the center of the electric core group can be provided with at least one temperature detection device to monitor the central position with the highest temperature in the electric core group in real time, and the accuracy of battery temperature detection and the battery management effect are improved.
In a possible embodiment, the location distribution scheme of the temperature detection device on the plane of the electric core group further comprises: except the temperature detection devices arranged at the center of the electric core group, the positions of the rest temperature detection devices are distributed to form at least one temperature acquisition ring, and the temperature acquisition ring takes the center of the electric core group as the center of a circle.
Specifically, in addition to the temperature detection device provided at the center of the electric core pack, the temperature detection device is also required to be provided in a region other than the center of the electric core pack. Under normal conditions, the temperature distribution of the electric core group shows a heat island effect, namely, the temperature distribution of the electric core group takes the center of the electric core group as the center of a circle to form individual temperature distribution circles, the temperature of each position on the same temperature distribution circle is similar, the larger the radius of the temperature distribution circle is, the lower the temperature of each position on the temperature distribution circle is. Therefore, when the temperature detection devices are arranged in the region outside the center of the electric core group, the position distribution of the temperature detection devices forms at least one temperature acquisition ring, and the temperature acquisition ring takes the center of the electric core group as the circle center, so that the detected temperature distribution information can reflect the actual condition of the temperature distribution of the electric core group, the distribution rationality of the temperature detection devices is improved, and the accuracy of the temperature detection of the battery is improved.
In a feasible implementation mode, the temperature detection devices on the same temperature acquisition ring are distributed at equal intervals, so that the temperature detection is uniformly carried out on the same temperature acquisition ring, and the accuracy of the temperature detection of the battery is effectively improved.
In a feasible implementation mode, the temperature detection devices on the adjacent temperature acquisition rings are distributed in a staggered mode, so that the distribution of the temperature detection devices on the whole plane is more uniform, and the utilization rate of the temperature detection devices and the accuracy of battery temperature detection are improved.
By way of example, fig. 3 is a diagram illustrating a position distribution of the temperature detecting device by taking a plane of the electric core assembly as an example. In fig. 3, a temperature detecting means is provided at the center of the electric core pack, and T1 is a temperature detected by the temperature detecting means. The center of the electric core group is used as a circle center, the distribution of the rest temperature detection devices forms two temperature acquisition rings, three temperature detection devices are distributed on each temperature acquisition ring, the temperature detection devices on the temperature acquisition rings are uniformly distributed, and the temperature detection devices on the adjacent temperature acquisition rings are distributed in a staggered manner. The temperature collecting rings are numbered from near to far according to the distance from the center of the electric core group. T2.0, T2.1 and T2.2 respectively represent the temperatures detected by the temperature detection devices at the corresponding positions on the first temperature acquisition ring, and T3.0, T3.1 and T3.2 respectively represent the temperatures detected by the temperature detection devices at the corresponding positions on the second temperature acquisition ring. Under normal use conditions, the value of T1 is greatest, the values of T2.0, T2.1, T2.2 are second-smallest, and the values of T3.0, T3.1, T3.2 are second-smallest. The values of T2.0, T2.1 and T2.2 are similar, and the values of T3.0, T3.1 and T3.2 are similar.
In a possible implementation manner, when the use condition of the battery is abnormal, a preset precaution operation is performed, wherein the precaution operation includes one or more of stopping the charging and discharging operations of the battery and sending an abnormality early warning message to a preset monitoring terminal, so that the abnormal use condition of the battery is timely found and measures are taken, and the use safety of the battery is provided.
In a feasible implementation manner, when the abnormality early warning information is sent to the monitoring terminal, the position of the battery with abnormal use condition is sent at the same time, so that the monitoring terminal can locate the battery in time and perform safety maintenance on the battery.
Fig. 4 is a schematic flow chart of a battery management method according to another embodiment of the present disclosure. As shown in fig. 4, the method includes:
s401, detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery, wherein the plurality of temperature detection devices are located at different preset positions of the battery and used for detecting the temperature of the preset positions.
Specifically, the specific content of step S401 may refer to the description of step S201, and is not described again.
And S402, the preset positions comprise a first position and a second position, and in the temperature distribution information, when the temperature of the first position is higher than that of the second position, the abnormal use condition of the battery is determined, wherein the distance between the first position and the center of the electric core group of the battery is larger than that between the second position and the center of the electric core group.
Specifically, the first position is any one of the preset positions except the center of the cell group, the second position is any one of the preset positions except the first position, and the position relationship between the first position and the second position is required to satisfy: the distance between the first position and the center of the electric core group is larger than that between the second position and the center of the electric core group. Wherein, the first and the second are just for distinction.
Specifically, when the temperature collecting rings are formed by the position distribution of the remaining temperature detecting devices except the temperature detecting device positioned at the center of the electric core group and the temperature collecting rings use the center of the electric core group as the center of a circle, the first position and the second position are preset positions positioned on different temperature collecting rings. Wherein the radius of the temperature collection ring at the first position is larger than the radius of the temperature collection ring at the second position.
Specifically, after the temperature distribution information of the battery is obtained, the temperature of each preset position in the battery can be obtained according to the temperature detected by each temperature detection device in the temperature distribution information and the preset position where each temperature detection device is located, and the temperatures of the preset positions are compared. When the service condition is normal, the closer the service condition is, the higher the temperature of the preset position is, and when the temperature of the first position is higher than that of the second position, namely the temperature of the first position is higher than that of the second position closer to the center of the battery, the temperature distribution abnormality of the battery can be determined, and the service condition abnormality of the battery can be further determined.
As an example, taking fig. 3 as an example, if T3.0 is greater than T1, it may be determined that the temperature distribution of the battery is abnormal.
According to the battery management method, the temperature detection is carried out on different positions of the battery through the plurality of temperature detection devices, so that the temperature distribution information of the battery is obtained, in the temperature distribution information, when the temperature of the first position is larger than the temperature of the second position closer to the center of the electric core group in the preset position, the abnormal use condition of the battery is determined, the use condition of the battery is judged based on the temperature obtained by the detection of the plurality of temperature detection devices, the dependence degree on a single temperature detection device is reduced, the reliability and the accuracy of the temperature detection of the battery are improved, and the battery management effect is further improved.
Fig. 5 is a schematic flow chart of a battery management method according to another embodiment of the disclosure. As shown in fig. 5, the method includes:
s501, detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery, wherein the plurality of temperature detection devices are located at different preset positions of the battery and used for detecting the temperature of the preset positions.
Specifically, the specific content of step S501 may refer to the description of step S401, and is not described again.
And S502, the preset positions comprise a first position and a second position, and when the temperature difference value between the first position and the second position is greater than a preset first threshold value in the temperature distribution information, it is determined that the use condition of the battery is abnormal, and the distance between the first position and the center of the electric core group of the battery is equal to the distance between the second position and the center of the electric core group.
Specifically, the first position is any one of the preset positions, the second position is any one of the preset positions except the first position, and the position relationship between the first position and the second position is required to satisfy: the distance between the first position and the center of the electric core group is equal to the distance between the second position and the center of the electric core group. Wherein, the first and the second are just for distinction.
Specifically, when the temperature collecting rings are formed at positions of the remaining temperature detecting devices, except for the temperature detecting device located at the center of the electric core pack, and the temperature collecting rings use the center of the electric core pack as the center of a circle, the first position and the second position may be different preset positions located on the same temperature collecting ring.
Specifically, after the temperature distribution information of the battery is obtained, the temperature of each preset position in the battery can be obtained according to the temperature detected by each temperature detection device in the temperature distribution information and the preset position where each temperature detection device is located, and the temperatures of the preset positions are compared with each other. When the using condition is normal, the temperature of the preset position which is the same with the center of the electric core group is close, and when the temperature difference value between the first position and the second position is larger than the preset first threshold value, the temperature distribution of the battery can be determined to be abnormal, and then the using condition of the battery can be determined to be abnormal. The first threshold is a preset threshold parameter, and can be set by research personnel according to own experience.
As an example, taking fig. 3 as an example, if the temperature difference between T2.0 and T2.1 is greater than the first threshold value, it may be determined that the temperature distribution of the battery is abnormal.
According to the battery management method, the temperature detection is carried out on different positions of the battery through the plurality of temperature detection devices, so that the temperature distribution information of the battery is obtained, and in the temperature distribution information, when the temperature difference value between the first position and the second position which are the same as the distance between the temperature difference value and the center of the electric core group is larger than the first threshold value, the abnormal use condition of the battery is determined, so that the use condition of the battery is judged based on the temperature obtained by the detection of the plurality of temperature detection devices, the dependence degree on a single temperature detection device is reduced, the reliability and the accuracy of the temperature detection of the battery are improved, and the battery management effect is further improved.
Fig. 6 is a schematic flow chart of a battery management method according to another embodiment of the present disclosure. As shown in fig. 6, the method includes:
s601, detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery, wherein the plurality of temperature detection devices are located at different preset positions of the battery and used for detecting the temperature of the preset positions.
Specifically, the specific content of step S601 may refer to the description of step S201, and is not described again.
And S602, when the battery is in a standing state, determining a temperature difference value between a preset position on one side of a preset central axis and a preset position on the other side of the preset central axis according to temperature distribution information.
Wherein, when the battery is in a static state, the battery does not carry out charging and discharging operations.
Specifically, on one or more planes of the electric core group of the battery, the preset positions are distributed on the central axis of the plane and on two sides of the central axis, the central axis passes through the center of the electric core group, and on the plane, the center of the electric core group is the center of the plane. Taking fig. 3 as an example, T1 is the temperature of the center of the electric core set, the dotted line passing through the center of the electric core set is the central axis of the plane of the electric core set shown in fig. 3, and the predetermined positions are distributed on and at both sides of the central axis.
Specifically, in the temperature distribution information, the temperatures of the preset positions on both sides of the central axis are obtained, and the temperature difference between the preset position on one side and the preset position on the other side is calculated.
And S603, when the temperature difference value exceeds a preset second threshold value, determining that the service condition of the battery is abnormal.
Specifically, in the standing state, the temperature of the preset position on one side in the temperature distribution information is close to the temperature of the preset position on the other side. When the temperature of the preset position on one side is higher than that of the preset position on the other side, the influence of environmental factors can be caused, for example, one side of the battery is irradiated by the sun, the other side of the battery is not irradiated by the sun, and the abnormality of one side of the battery can also be caused.
Specifically, when the temperature difference between the preset position on one side and the preset position on the other side in the temperature distribution information exceeds a second threshold, it is determined that the use condition of the battery is abnormal. If the second threshold value is not exceeded, the influence of the environmental factors is judged, and no processing is carried out. The second threshold is a preset threshold parameter, and can be set by research personnel according to own experience.
By way of example, taking fig. 3 as an example, T2.1, T3.1 and T3.0 are temperatures of preset positions on one side of the central axis of the plane of the electric core assembly, T2.2 and T3.2 are temperatures of preset positions on the other side of the central axis, and according to T2.1, T3.1 and T3.0 and T2.2 and T3.2, a temperature difference between the preset positions on one side of the central axis and the preset positions on the other side can be determined, and when the temperature difference exceeds a second threshold value, it is determined that the use condition of the battery is abnormal.
According to the battery management method, the temperature detection is carried out on different positions of the battery through the plurality of temperature detection devices, so that the temperature distribution information of the battery is obtained, and in the temperature distribution information, when the temperature difference between the preset position on one side and the preset position on the other side is larger than the second threshold value, the abnormal use condition of the battery is determined, so that the use condition of the battery is judged based on the temperature detected by the plurality of temperature detection devices, the dependence degree on a single temperature detection device is reduced, the reliability and the accuracy of the temperature detection of the battery are improved, and the battery management effect is further improved.
Fig. 7 is a schematic flow chart of a battery management method according to another embodiment of the disclosure. As shown in fig. 7, the method includes:
and S701, detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery, wherein the plurality of temperature detection devices are positioned at different preset positions of the battery and are used for detecting the temperature of the preset positions.
Specifically, the specific content of step S701 may refer to the description of step S201, and is not described again.
S702, in the temperature distribution information, determining whether the temperature of at least one preset position is larger than a preset third threshold value, and if so, determining that the service condition of the battery is abnormal.
Specifically, when the temperature distribution information of the battery is obtained, the temperature of each preset position in the temperature distribution information is compared with a preset third threshold, and when the temperature of at least one preset position is greater than the third threshold, the situation that the temperature of the battery is too high can be determined, and then the abnormal use condition of the battery can be determined. The third threshold is a preset threshold parameter, and can be set by research personnel according to own experience.
By way of example, taking fig. 3 as an example, when at least one of T1, T2.0, T2.1, T2.2, T3.0, T3.1, and T3.2 is greater than the third threshold, it may be determined that the temperature of the battery is too high, and thus, it may be determined that the usage condition of the battery is abnormal.
According to the battery management method, the temperature detection is carried out on different positions of the battery through the plurality of temperature detection devices to obtain the temperature distribution information of the battery, and in the temperature distribution information, when the temperature of at least one preset position is larger than a third threshold value, the abnormal use condition of the battery is determined, so that the use condition of the battery is judged based on the temperature information obtained by the detection of the plurality of temperature detection devices, the dependence degree on a single temperature detection device is reduced, the reliability and the accuracy of the temperature detection of the battery are improved, and the battery management effect is further improved.
Fig. 8 is a schematic flow chart of a battery management method according to another embodiment of the disclosure. As shown in fig. 8, the method includes:
s801, detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery, wherein the plurality of temperature detection devices are located at different preset positions of the battery and used for detecting the temperature of the preset positions.
Specifically, the specific content of step S801 may refer to the description of step S201, and is not described again.
S802, in the temperature distribution information, whether the temperature of at least one preset position is smaller than a fourth threshold value is determined, and if yes, the use condition of the battery is determined to be abnormal.
Specifically, when the temperature distribution information of the battery is obtained, the temperature of each preset position in the temperature distribution information is compared with a preset fourth threshold, and when the temperature of at least one preset position is lower than the fourth threshold, the condition that the temperature of the battery is too low can be determined, so that the abnormal use condition of the battery can be determined. The fourth threshold is a preset threshold parameter, and can be set by research personnel according to own experience.
In a possible embodiment, when the temperature of at least one preset position is lower than the fourth threshold, the battery is heated, and the problem that the temperature of the battery is too low is solved.
By way of example, taking fig. 3 as an example, when at least one of T1, T2.0, T2.1, T2.2, T3.0, T3.1, and T3.2 is smaller than the fourth threshold, it may be determined that the temperature of the battery is too low, and thus, it may be determined that the usage condition of the battery is abnormal.
According to the battery management method, the temperature detection is carried out on different positions of the battery through the plurality of temperature detection devices to obtain the temperature distribution information of the battery, and in the temperature distribution information, when the temperature of at least one preset position is lower than the fourth threshold value, the abnormal use condition of the battery is determined, so that the use condition of the battery is judged based on the temperatures detected by the plurality of temperature detection devices, the dependence degree on a single temperature detection device is reduced, the reliability and the accuracy of the temperature detection of the battery are improved, and the battery management effect is further improved.
Fig. 9 is a schematic flowchart of a battery management method according to another embodiment of the disclosure. In the method, at least one temperature detection device is arranged at the center of the electric core group, and in addition to the temperature detection devices arranged at the center of the electric core group, the position distribution of the rest temperature detection devices forms at least one temperature collection ring, and the temperature collection ring takes the center of the electric core group as the center of a circle, which can be referred to the position distribution scheme of the temperature detection devices in the feasible embodiment. As shown in fig. 9, the method includes:
s901, detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery.
Specifically, the specific content of step S901 may refer to the description of step S201, and is not described again.
And S902, determining the temperature difference value of the temperature acquisition rings according to the highest temperature and the lowest temperature in the temperature acquisition rings aiming at the temperature acquisition rings.
Specifically, each temperature acquisition ring is provided with at least two temperature detection devices respectively for detecting the temperature of different preset positions on the temperature acquisition ring, and the accuracy of battery temperature detection is improved. And aiming at each temperature acquisition ring, acquiring the highest temperature and the lowest temperature in the temperature acquisition ring in the temperature distribution information of the battery, and calculating the difference value of the highest temperature and the lowest temperature to obtain the temperature difference value of the temperature acquisition ring.
And S903, when the temperature difference value of at least one temperature collecting ring is larger than a preset fifth threshold value, determining that the service condition of the battery is abnormal.
Specifically, the temperature difference values of the temperature acquisition rings are respectively compared with a preset fifth threshold value. When the use condition is normal, the distances between the preset positions in the same temperature collecting ring and the center of the electric core group are equal or close, so the temperatures at the preset positions in the same temperature collecting ring are also equal or close. After comparison, when the temperature difference value of at least one temperature collecting ring is larger than a preset fifth threshold value, the temperature distribution of the battery can be determined to be abnormal, and then the use condition of the battery can be determined to be abnormal, so that the battery management effect is improved according to the temperature difference value of each temperature collecting ring. The fifth threshold is a preset threshold parameter, and can be set by research personnel according to own experience.
By way of example, taking fig. 3 as an example, the maximum temperature and the minimum temperature of the first temperature acquisition loop, which are the difference between the maximum temperature and the minimum temperature, i.e. the temperature difference of the first temperature loop, can be obtained in T2.0, T2.1, and T2.2. The maximum and minimum temperatures of the second temperature acquisition loop, i.e., the temperature difference of the second temperature loop, can be obtained in T3.0, T3.1, T3.2. And determining that the use condition of the battery is abnormal when at least one temperature difference value is greater than a fifth threshold value in the temperature difference value of the first temperature ring and the temperature difference value of the second temperature ring.
According to the battery management method, the temperature detection is carried out on different positions of the battery through the plurality of temperature detection devices to obtain the temperature distribution information of the battery, and in the temperature distribution information, when the temperature difference value of at least one temperature acquisition ring is larger than a preset fifth threshold value, the abnormal use condition of the battery is determined, so that the use condition of the battery is judged based on the temperatures detected by the plurality of temperature detection devices, the dependence degree on a single temperature detection device is reduced, the reliability and the accuracy of the temperature detection of the battery are improved, and the battery management effect is further improved.
Fig. 10 is a flowchart illustrating a battery management method according to another embodiment of the disclosure. In the method, at least one temperature detection device is arranged at the center of the electric core group, and in addition to the temperature detection devices arranged at the center of the electric core group, the position distribution of the rest temperature detection devices forms at least one temperature collection ring, and the temperature collection ring takes the center of the electric core group as the center of a circle, which can be referred to the position distribution scheme of the temperature detection devices in the feasible embodiment. As shown in fig. 10, the method includes:
and S1001, detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery.
Specifically, the specific content of S1001 may refer to the description of S201, and is not described again.
S1002, when the battery is in a static state, determining the average temperature of each temperature acquisition ring.
S1003, when the difference value between the average temperature of at least one temperature acquisition ring and the current environment temperature of the battery is larger than a preset sixth threshold value, determining that the service condition of the battery is abnormal.
Specifically, the battery is in a static state, that is, the battery is in a state of stopping working (that is, stopping charging and discharging), and in a normal state, the temperature of the battery is close to the ambient temperature of the battery. In the temperature distribution information of the battery, the average temperature of each temperature acquisition ring is determined, and the current environment temperature of the battery is acquired at the same time. And comparing the average temperature of each temperature acquisition ring with the current environment temperature to obtain the temperature difference value between the average temperature of each temperature acquisition ring and the current environment temperature. When at least one temperature difference value is larger than a preset sixth threshold value, the temperature detection of the battery may be failed, or the environment where the battery is located may suddenly change, so as to determine that the service condition of the battery is abnormal.
In one possible embodiment, the weight associated with each temperature acquisition loop is preset. When the average temperature of the temperature acquisition ring is determined, the weight corresponding to the temperature acquisition ring is obtained, the temperature of each preset position in the temperature acquisition ring is weighted and averaged according to the weight corresponding to the temperature acquisition ring, and the average temperature of the temperature acquisition ring is obtained, so that the calculation accuracy of the average temperature of the temperature acquisition ring is improved.
In one possible embodiment, the corresponding weight of the temperature acquisition ring is determined according to the distance between the temperature acquisition ring and the center of the electric core group. The farther the distance between the temperature acquisition ring and the center of the electric core group is, the larger the weight corresponding to the temperature ring is, so that the temperature of the temperature acquisition ring is compensated through the weight, the calculation accuracy of the average temperature of the temperature acquisition ring is improved, and the judgment accuracy of the service condition of the battery is further improved.
For example, taking fig. 3 as an example, T2.0, T2.1, and T2.2 may be weighted and averaged to obtain the average temperature of the first acquired temperature coil. The weighted average of T3.0, T3.1, and T3.2 may be performed to obtain the average temperature of the second acquisition loop. And calculating the temperature difference between the average temperature of each temperature acquisition ring and the current environment temperature, and determining that the service condition of the battery is abnormal when at least one temperature difference is greater than a sixth threshold value.
According to the battery management method, the temperature detection is carried out on different positions of the battery through the plurality of temperature detection devices to obtain the temperature distribution information of the battery, and when the difference value between the average temperature of at least one temperature acquisition ring and the current environment temperature of the battery is larger than the sixth threshold value in the standing state of the battery, the abnormal use condition of the battery is determined, so that the use condition of the battery is judged based on the temperature detected by the plurality of temperature detection devices, the dependence degree on a single temperature detection device is reduced, the reliability and the accuracy of the temperature detection of the battery are improved, and the battery management effect is further improved.
The embodiments of the present disclosure shown in fig. 2 to 10 may be combined with each other in a non-exclusive manner.
Among the "first threshold", the "second threshold", … …, and the "sixth threshold", the "first, second, … …, and sixth" only serve to distinguish different thresholds.
Fig. 11 is a schematic structural diagram of a battery management system according to an embodiment of the present disclosure. As shown in fig. 11, the system includes:
a detection unit 1101, configured to perform temperature detection on the battery through a plurality of preset temperature detection devices to obtain temperature distribution information of the battery, where the plurality of temperature detection devices are located at different preset positions of the battery and are configured to detect temperatures of the preset positions; and
a determining unit 1102 for determining whether the usage condition of the battery is abnormal or not based on the temperature distribution information.
In one possible embodiment, the temperature detection means are uniformly distributed on one or more planes of the electric core pack of the battery.
In one possible embodiment, the center of the electric core set is provided with at least one temperature detection device.
In one possible embodiment, in addition to the temperature detecting device arranged at the center of the electric core assembly, the remaining temperature detecting devices are distributed to form at least one temperature collecting ring, and the temperature collecting ring takes the center of the electric core assembly as the center of a circle.
In one possible embodiment, the temperature sensing devices on the same temperature pick-up ring are equally spaced.
In one possible embodiment, the temperature sensing devices on adjacent temperature acquisition rings are staggered.
In one possible embodiment, the preset positions include a first position and a second position; the determining unit 1102 is specifically configured to:
and when the temperature of the first position is higher than that of the second position, determining that the use condition of the battery is abnormal, wherein the distance between the first position and the center of the electric core group of the battery is larger than that between the second position and the center of the electric core group.
In one possible embodiment, the preset positions include a first position and a second position; the determining unit 1102 is specifically configured to:
and when the temperature difference value between the first position and the second position is greater than a preset first threshold value, determining that the using condition of the battery is abnormal, wherein the distance between the first position and the center of the electric core group of the battery is equal to the distance between the second position and the center of the electric core group.
In one possible embodiment, the preset positions are distributed on the central axis of one or more planes of the electric core group of the battery and on two sides of the central axis; the determining unit 1102 is specifically configured to:
when the battery is in a standing state, determining a temperature difference value between a preset position on one side of the central axis and a preset position on the other side of the central axis according to temperature distribution information;
and when the temperature difference value is larger than a preset second threshold value, determining that the use condition of the battery is abnormal.
In a possible embodiment, the determining unit 1102 is specifically configured to:
and determining whether the temperature of at least one preset position is greater than a preset third threshold value in the temperature distribution information, and if so, determining that the service condition of the battery is abnormal.
In a possible embodiment, the determining unit 1102 is specifically configured to:
and determining whether the temperature of at least one preset position in the temperature distribution information is smaller than a preset fourth threshold, and if so, determining that the service condition of the battery is abnormal.
In one possible embodiment, the system further comprises:
and the heating unit is used for heating the battery when the temperature of at least one preset position is less than a fourth threshold value.
In a possible embodiment, the determining unit 1102 is specifically configured to:
when the battery is in a working state or a standing state, determining the temperature difference value of the temperature acquisition rings according to the highest temperature and the lowest temperature in the temperature acquisition rings aiming at each temperature acquisition ring;
and when the temperature difference value of at least one temperature acquisition ring is larger than a preset fifth threshold value, determining that the service condition of the battery is abnormal.
In a possible embodiment, the determining unit 1102 is specifically configured to:
when the battery is in a standing state, determining the average temperature of each temperature acquisition ring;
and when the difference value between the average temperature of at least one temperature acquisition ring and the current environment temperature of the battery is larger than a preset sixth threshold value, determining that the use condition of the battery is abnormal.
In a possible embodiment, the determining unit 1102 is specifically configured to:
acquiring the weight corresponding to the temperature acquisition ring;
and calculating the average temperature of the temperature acquisition ring according to the weight corresponding to the temperature acquisition ring and the temperature of a preset position in the temperature acquisition ring.
In a possible embodiment, the determining unit 1102 is specifically configured to:
and determining the weight corresponding to the temperature acquisition ring according to the distance between the temperature acquisition ring and the center of the electric core group of the battery.
In one possible embodiment, the system further comprises:
a preventive unit for performing a preset preventive operation when it is determined that the use condition of the battery is abnormal, the preventive operation including one or more of: stopping the charging and discharging operation of the battery and sending an abnormity early warning message to a preset monitoring terminal.
The battery management system provided in fig. 11 can perform any of the above-described method embodiments, and the implementation principle and technical effect are similar, which are not described herein again.
Fig. 12 is a schematic structural diagram of a battery management system according to another embodiment of the present disclosure. As shown in fig. 12, the battery management system may include: a processor 1201 and a memory 1202, the memory 1201 being adapted to store computer executable instructions, the processor 1202 implementing the solution of any one of the above-described method embodiments when executing the computer program.
The processor 1201 may be a general-purpose processor, including a central processing unit CPU, a Network Processor (NP), and the like; but also a digital signal processor DSP, an application specific integrated circuit ASIC, a field programmable gate array FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The memory 1202 may include a Random Access Memory (RAM) and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.
Fig. 13 is a schematic structural diagram of a battery according to an embodiment of the present disclosure. As shown in fig. 13, the battery includes a battery pack 1301, a plurality of temperature detection devices 1302, and a battery management system 1303 provided in any of the above embodiments.
Specifically, the temperature detecting devices 1203 are disposed at different positions of the electric core assembly 1301 and are configured to detect temperatures of the electric core assembly 1301 at different positions to obtain temperature distribution information of the electric core assembly 1301, the battery management system 1303 obtains the temperature distribution information, and determines whether the service condition of the battery is abnormal according to the temperature distribution information, and when the abnormal condition occurs, the battery management system 1303 may perform corresponding prevention operation on the electric core assembly 1301. The preventive operation comprises one or more of stopping the charging and discharging operation of the battery pack 1301 and sending an abnormity early warning message to preset monitoring equipment.
The embodiment of the disclosure also provides an electric vehicle, which comprises the battery provided by the embodiment.
The embodiments of the present disclosure also provide a storage medium having stored therein instructions, which when run on a computer, cause the computer to execute the method according to any of the embodiments described above.
The embodiments of the present disclosure also provide a program product, which includes a computer program, where the computer program is stored in a storage medium, and at least one processor can read the computer program from the storage medium, and when the at least one processor executes the computer program, the method of any of the above embodiments can be implemented.
It is to be understood that the various numerical designations referred to in the embodiments of the disclosure are merely for convenience of description and are not intended to limit the scope of the embodiments of the disclosure.
It should be understood that, in the embodiment of the present disclosure, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present disclosure.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. The embodiments of the disclosure are intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (38)

1. A method of battery management, the method comprising:
the method comprises the steps that temperature detection is carried out on a battery through a plurality of preset temperature detection devices to obtain temperature distribution information of the battery, and the plurality of temperature detection devices are located at different preset positions of the battery and are used for detecting the temperature of the preset positions;
and determining whether the service condition of the battery is abnormal or not according to the temperature distribution information.
2. The method according to claim 1, wherein the temperature sensing devices are uniformly distributed on one or more planes of the electric core pack of the battery.
3. The method according to claim 2, wherein the center of the electric core pack is provided with at least one of the temperature sensing devices.
4. The method according to claim 3, wherein the positions of the remaining temperature sensing devices except the temperature sensing device disposed at the center of the electric core pack are distributed to form at least one temperature collecting ring centered at the center of the electric core pack.
5. The method of claim 4, wherein said temperature sensing devices on the same temperature pick-up ring are equally spaced.
6. The method of claim 5, wherein said temperature sensing devices on adjacent said temperature acquisition loops are staggered.
7. The method of any one of claims 1-6, wherein the preset positions include a first position and a second position; the determining whether the use condition of the battery is abnormal according to the temperature distribution information includes:
and when the temperature of the first position is greater than that of the second position, determining that the use condition of the battery is abnormal, wherein the distance between the first position and the center of the battery core group of the battery is greater than that between the second position and the center of the battery core group.
8. The method of any one of claims 1-6, wherein the preset positions include a first position and a second position; the determining whether the use condition of the battery is abnormal according to the temperature distribution information includes:
and when the temperature difference value between the first position and the second position is greater than a preset first threshold value, determining that the use condition of the battery is abnormal, wherein the distance between the first position and the center of the battery core group of the battery is equal to the distance between the second position and the center of the battery core group.
9. The method according to any one of claims 1 to 6, wherein the predetermined positions are distributed on the central axis of one or more planes of the cell pack of the battery and on both sides of the central axis; the determining whether the use condition of the battery is abnormal according to the temperature distribution information includes:
when the battery is in a standing state, determining a temperature difference value between the preset position on one side of the central axis and the preset position on the other side of the central axis according to the temperature distribution information;
and when the temperature difference value is larger than a preset second threshold value, determining that the service condition of the battery is abnormal.
10. The method according to any one of claims 1 to 6, wherein the determining whether the use condition of the battery is abnormal according to the temperature distribution information includes:
and determining whether at least one preset position exists in the temperature distribution information, wherein the temperature of the preset position is greater than a preset third threshold, and if so, determining that the service condition of the battery is abnormal.
11. The method according to any one of claims 1 to 6, wherein the determining whether the use condition of the battery is abnormal according to the temperature distribution information includes:
and determining whether at least one preset position exists in the temperature distribution information, wherein the temperature of the preset position is smaller than a preset fourth threshold, and if so, determining that the service condition of the battery is abnormal.
12. The method of claim 11, further comprising:
when the temperature of at least one preset position is lower than the fourth threshold value, heating the battery.
13. The method according to any one of claims 4 to 6, wherein the determining whether the use condition of the battery is abnormal according to the temperature distribution information includes:
for each temperature acquisition ring, determining the temperature difference value of the temperature acquisition ring according to the highest temperature and the lowest temperature in the temperature acquisition ring;
and when the temperature difference value of at least one temperature acquisition ring is larger than a preset fifth threshold value, determining that the service condition of the battery is abnormal.
14. The method according to any one of claims 4 to 6, wherein the determining whether the use condition of the battery is abnormal according to the temperature distribution information includes:
when the battery is in a standing state, determining the average temperature of each temperature acquisition ring;
when the difference value between the average temperature of at least one temperature acquisition ring and the current environment temperature of the battery is larger than a preset sixth threshold value, determining that the use condition of the battery is abnormal.
15. The method of claim 14, wherein said determining an average temperature of each of said acquisition loops comprises:
acquiring the weight corresponding to the temperature acquisition ring;
and calculating the average temperature of the temperature acquisition ring according to the weight corresponding to the temperature acquisition ring and the temperature of the preset position in the temperature acquisition ring.
16. The method of claim 15, wherein said obtaining the corresponding weight of said temperature acquisition loop comprises:
and determining the weight corresponding to the temperature acquisition ring according to the distance between the temperature acquisition ring and the center of the battery core group of the battery.
17. The method according to any one of claims 1 to 6, wherein the determining whether the use condition of the battery is abnormal according to the temperature distribution information includes:
when the abnormal use condition of the battery is determined, executing preset preventive operation, wherein the preventive operation comprises one or more of the following operations: stopping the charging and discharging operation of the battery, and sending an abnormity early warning message to a preset monitoring terminal.
18. A battery management system, the system comprising:
the detection unit is used for detecting the temperature of the battery through a plurality of preset temperature detection devices to obtain the temperature distribution information of the battery, and the plurality of temperature detection devices are positioned at different preset positions of the battery and are used for detecting the temperature of the preset positions; and
and the determining unit is used for determining whether the use condition of the battery is abnormal or not according to the temperature distribution information.
19. The system according to claim 18, wherein the temperature detection means are uniformly distributed on one or more planes of the battery cell pack.
20. The system according to claim 19, wherein the center of the electric core set is provided with at least one of the temperature detecting devices.
21. The system of claim 20, wherein the positions of the remaining temperature sensing devices except the temperature sensing device disposed at the center of the electric core pack are distributed to form at least one temperature collecting ring centered at the center of the electric core pack.
22. The system of claim 21, wherein said temperature sensing devices on the same temperature pick-up ring are equally spaced.
23. The system of claim 22, wherein said temperature sensing devices on adjacent said temperature acquisition loops are staggered.
24. The system of any one of claims 18-23, wherein the preset positions include a first position and a second position; the determining unit is specifically configured to:
and when the temperature of the first position is greater than that of the second position, determining that the use condition of the battery is abnormal, wherein the distance between the first position and the center of the battery core group of the battery is greater than that between the second position and the center of the battery core group.
25. The system of any one of claims 18-23, wherein the preset positions include a first position and a second position; the determining unit is specifically configured to:
and when the temperature difference value between the first position and the second position is greater than a preset first threshold value, determining that the use condition of the battery is abnormal, wherein the distance between the first position and the center of the battery core group of the battery is equal to the distance between the second position and the center of the battery core group.
26. The system according to any one of claims 18 to 23, wherein said predetermined positions are distributed on the central axis of one or more planes of the battery cell pack of said battery and on both sides of said central axis; the determining unit is specifically configured to:
when the battery is in a standing state, determining a temperature difference value between the preset position on one side of the central axis and the preset position on the other side of the central axis according to the temperature distribution information;
and when the temperature difference value is larger than a preset second threshold value, determining that the service condition of the battery is abnormal.
27. The system according to any of claims 18-23, wherein the determining unit is specifically configured to:
and determining whether at least one preset position exists in the temperature distribution information, wherein the temperature of the preset position is greater than a preset third threshold, and if so, determining that the service condition of the battery is abnormal.
28. The system according to any of claims 18-23, wherein the determining unit is specifically configured to:
and determining whether at least one preset position exists in the temperature distribution information, wherein the temperature of the preset position is smaller than a preset fourth threshold, and if so, determining that the service condition of the battery is abnormal.
29. The system of claim 28, further comprising:
and the heating unit is used for heating the battery when the temperature of at least one preset position is lower than the fourth threshold value.
30. The system according to any of claims 21-23, wherein the determining unit is specifically configured to:
when the battery is in a working state or a standing state, determining the temperature difference value of the temperature acquisition rings according to the highest temperature and the lowest temperature in the temperature acquisition rings aiming at the temperature acquisition rings;
and when the temperature difference value of at least one temperature acquisition ring is larger than a preset fifth threshold value, determining that the service condition of the battery is abnormal.
31. The system according to any of claims 21-23, wherein the determining unit is specifically configured to:
when the battery is in a standing state, determining the average temperature of each temperature acquisition ring;
when the difference value between the average temperature of at least one temperature acquisition ring and the current environment temperature of the battery is larger than a preset sixth threshold value, determining that the use condition of the battery is abnormal.
32. The system according to claim 31, wherein the determining unit is specifically configured to:
acquiring the weight corresponding to the temperature acquisition ring;
and calculating the average temperature of the temperature acquisition ring according to the weight corresponding to the temperature acquisition ring and the temperature of the preset position in the temperature acquisition ring.
33. The system according to claim 32, wherein the determining unit is specifically configured to:
and determining the weight corresponding to the temperature acquisition ring according to the distance between the temperature acquisition ring and the center of the battery core group of the battery.
34. The system according to any one of claims 18-23, further comprising:
a preventive unit configured to perform a preset preventive operation when it is determined that an abnormality occurs in the use condition of the battery, the preventive operation including one or more of: stopping the charging and discharging operation of the battery, and sending an abnormity early warning message to a preset monitoring terminal.
35. A battery management system, the system comprising a memory and a processor;
the memory is to store program instructions;
the processor is configured to invoke program instructions in the memory to perform the method of any of claims 1-17.
36. A battery comprising a pack of cells, a plurality of temperature sensing devices, and a battery management system as claimed in any one of claims 18 to 34 or claim 35.
37. An electric vehicle characterized in that the electric vehicle comprises the battery according to claim 36.
38. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program; the computer program, when executed, implementing the method of any one of claims 1-17.
CN202010763533.0A 2020-07-31 2020-07-31 Battery management method, system, medium, battery, and electric vehicle Pending CN111890938A (en)

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CN113608127A (en) * 2021-10-08 2021-11-05 湖南大学 Thermal anomaly detection and positioning method for cylindrical lithium ion battery
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