Abnormality detection method of low-voltage battery, readable storage medium, equipment and product

Abstract

The invention provides an anomaly detection method of a low-voltage battery, a readable storage medium, equipment and a product, the method is applied to an electric vehicle, the electric vehicle maintains an accumulated value of the low-voltage battery corresponding to at least one abnormal condition, and each abnormal condition is configured with a corresponding abnormal charging condition and an abnormal accumulated threshold value; the method comprises the following steps: acquiring target voltage information of the low-voltage battery; under the condition that the target voltage information is matched with a target abnormal charging condition, charging the low-voltage battery, and increasing an accumulated value of a target abnormal condition corresponding to the target abnormal charging condition; and determining a corresponding target accumulated value according to the accumulated value of the target abnormal condition, and determining that the low-voltage battery is abnormal under the condition that the target accumulated value is greater than a target abnormal accumulated threshold value corresponding to the target abnormal condition.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile battery detection, and in particular to a method, a readable storage medium, a device and a product for detecting an abnormality of a low-voltage battery. Background Art

[0002] As an environmentally friendly means of transportation, electric vehicles are mainly driven by electric motors and batteries. Compared with traditional fuel vehicles, they have the characteristics of low noise and zero emissions. Among them, electric vehicles can be equipped with low-voltage batteries to power the low-voltage electrical systems on board, such as lights, navigation, air conditioning, etc. However, with the extension of the use time, the performance of the low-voltage battery will gradually weaken, causing the battery capacity to decay. When the battery capacity decays to a certain extent, the vehicle will be unable to start because the low-voltage battery voltage is too low, causing great trouble for the owner's car travel.

[0003] In the related art, whether the low-voltage battery needs to be charged in time is usually judged only based on the voltage value of the low-voltage battery. However, this method cannot determine whether the performance of the low-voltage battery is abnormal, resulting in the risk of the vehicle still being unable to start. Summary of the invention

[0004] In view of this, the present invention provides a low-voltage battery abnormality detection method, a readable storage medium, a device and a product to solve the deficiencies in the related art.

[0005] Specifically, the present invention is achieved through the following technical solutions:

[0006] According to a first aspect of the present invention, a method for detecting an abnormality of a low-voltage battery is provided, which is applied to an electric vehicle, wherein the electric vehicle maintains a cumulative value of the low-voltage battery corresponding to at least one abnormal situation, and each abnormal situation is configured with a corresponding abnormal charging condition and an abnormal cumulative threshold; the method comprises:

[0007] Acquiring target voltage information of the low-voltage battery;

[0008] When the target voltage information matches the target abnormal charging condition, charging the low voltage battery, and increasing the cumulative value of the target abnormal condition corresponding to the target abnormal charging condition;

[0009] A corresponding target cumulative value is determined according to the cumulative value of the target abnormal situation, and when the target cumulative value is greater than a target abnormal cumulative threshold corresponding to the target abnormal situation, it is determined that the low-voltage battery is abnormal.

[0010] Optionally, the target voltage information includes: the voltage value of the low-voltage battery and the interval time from the end of the last charging.

[0011] Optionally, the acquiring target voltage information of the low-voltage battery includes:

[0012] When the low-voltage battery is finished charging, the voltage value of the low-voltage battery is monitored, and the monitored voltage value and the corresponding monitoring duration are used as the target voltage information; or,

[0013] When the low-voltage battery finishes charging, in response to a target operation triggered by a user for the low-voltage battery, the voltage value of the low-voltage battery and the interval time between the target operation and the last charging end of the low-voltage battery are used as the target voltage information.

[0014] Optionally, the target abnormal charging condition is:

[0015] The interval duration is a preset duration and the voltage value is less than a first preset voltage value; and / or,

[0016] The interval duration matches a preset duration range and the voltage value is less than a second preset voltage value corresponding to the interval duration, and the interval duration is negatively correlated with the second preset voltage value.

[0017] Optionally, charging the low-voltage battery includes:

[0018] charging the low-voltage battery for a first preset charging time; or,

[0019] The low-voltage battery is charged until the voltage value of the low-voltage battery reaches a third preset voltage value or the charging time is longer than the second preset charging time.

[0020] Optionally, the low-voltage battery corresponds to multiple abnormal conditions, and a complex condition formed by combining at least a part of the abnormal conditions including the target abnormal condition among the multiple abnormal conditions is configured with a corresponding abnormal accumulation threshold; and determining the corresponding target accumulation value according to the accumulation value of the target abnormal condition includes:

[0021] The cumulative value of the target abnormal situation is used as the target cumulative value; or,

[0022] The target cumulative value is calculated according to the cumulative values ​​of each abnormal situation in the complex situation.

[0023] Optionally, the method further includes:

[0024] Sending abnormal prompt information about the low-voltage battery to the instrument panel and / or the vehicle central control screen; and / or,

[0025] The battery abnormality prompt information is sent to the user terminal and / or the after-sales platform of the electric vehicle through the vehicle-mounted remote information processing terminal.

[0026] According to a second aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the steps of the method described in the first aspect.

[0027] According to a third aspect of the present invention, there is provided an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method of the first aspect when executing the program.

[0028] According to a fourth aspect of the present invention, there is provided a computer program product, comprising a computer program / instruction, which implements the steps of the method as described in the first aspect when executed by a processor.

[0029] It can be seen from the above embodiments that the electric vehicle of this specification maintains a cumulative value of at least one abnormal situation for the low-voltage battery, and each abnormal situation is configured with a corresponding abnormal charging condition and an abnormal cumulative threshold. After obtaining the target voltage information of the low-voltage battery, if the target voltage information matches the target abnormal charging condition, the cumulative value of the target abnormal situation corresponding to the above target abnormal charging condition can be increased while charging the low-voltage battery. When it is determined based on the cumulative value of the target abnormal situation that the target cumulative value is greater than the target abnormal cumulative threshold corresponding to the target abnormal situation, the low-voltage battery can be determined to be abnormal. Wherein, while the low-voltage battery does not affect normal charging, it can also determine whether the low-voltage battery frequently has the corresponding abnormal situation based on the comparison result of the target cumulative value and the above target abnormal cumulative threshold, thereby effectively judging whether the performance of the low-voltage battery is abnormal, and avoiding the situation where the vehicle cannot start. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the architecture of a low-voltage battery abnormality detection system shown in an embodiment disclosed in the present invention;

[0032] Figure 2 It is a flow chart of a method for detecting an abnormality of a low-voltage battery shown in an embodiment disclosed in the present invention;

[0033] Figure 3 It is a schematic diagram of a charging module and an abnormal alarm module of a low-voltage battery shown in an embodiment disclosed in the present invention;

[0034] Figure 4 It is a flow chart of another method for detecting abnormality of a low-voltage battery according to an embodiment disclosed in the present invention;

[0035] Figure 5 is a schematic structural diagram of an electronic device shown in an embodiment of the present invention;

[0036] Figure 6 Schematic diagram of a low-voltage battery abnormality detection device shown in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are only examples of devices and methods consistent with some aspects of the present invention.

[0038] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0039] It should be understood that although the terms first, second, third, etc. may be used in the present invention to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0040] The following is a detailed description of an embodiment of abnormality detection of a low-voltage battery in the present specification with reference to the accompanying drawings.

[0041] Figure 1 is a schematic diagram of the architecture of a low-voltage battery abnormality detection system shown in an exemplary embodiment of this specification, such as Figure 1 As shown, the above system may include the following components: a power battery 10 and a low-voltage battery 11. Among them:

[0042] As a core component of an electric vehicle, the power battery 10 can be responsible for storing and releasing electric energy to provide power for the electric motor of the electric vehicle. A battery management system (BMS) can be integrated inside the power battery 10. The BMS consists of two parts: hardware and software. The hardware includes, for example, a master control unit, a slave control unit, an information acquisition unit, etc., and the software is responsible for data analysis and processing. Specifically, the BMS can be connected to the battery unit (i.e., the battery cell) of the power battery through the above hardware, so as to collect data such as the voltage, current, and temperature of the battery in real time, and perform battery status monitoring and control through the above software.

[0043] Correspondingly, the BMS may also be connected to the low-voltage battery 11, and maintain a cumulative value of at least one abnormal situation corresponding to the above-mentioned low-voltage battery, and each abnormal situation may be configured with a corresponding abnormal charging condition and an abnormal cumulative threshold, so that after obtaining the voltage information from the low-voltage battery 11, it is determined whether the power battery 10 needs to charge the low-voltage battery 11 according to the above-mentioned voltage information, and whether the low-voltage battery 11 is abnormal according to the relationship between the cumulative value of each abnormal situation and the corresponding abnormal cumulative threshold, wherein the relevant data of the above-mentioned cumulative value, abnormal charging condition and corresponding abnormal cumulative threshold may be stored in the local memory, the non-volatile storage device of the BMS or other devices respectively; the above-mentioned cumulative value may be specifically implemented by a hardware counter in the BMS or a software counter designed by programming, and this is not limited in this specification.

[0044] As an important component of an electric vehicle, the low-voltage battery 11 can not only provide stable power support for the low-voltage system of the vehicle, but also work in conjunction with the power battery 10 to ensure the normal operation of the vehicle. For example, in an electric vehicle, the low-voltage battery is responsible for waking up the power battery system to start the vehicle. Among them, the low-voltage battery 11 can be connected to the power battery 10 through a direct current to direct current converter (DC / DC converter) and charged according to the power provided by the power battery 10. In addition, the low-voltage battery 11 can select a 12V (Volt) lithium battery or lead-acid battery according to the actual needs of the vehicle, and this specification does not limit this.

[0045] Figure 2 is a flow chart of a method for detecting abnormality of a low-voltage battery according to an embodiment of the present invention. Figure 2 As shown, it is applied to an electric vehicle, the electric vehicle maintains a cumulative value of the low-voltage battery corresponding to at least one abnormal situation, and each abnormal situation is configured with a corresponding abnormal charging condition and an abnormal cumulative threshold; the method may include the following steps:

[0046] Step S202, obtaining target voltage information of the low-voltage battery.

[0047] The above-mentioned electric vehicle can obtain the target voltage information of the above-mentioned low-voltage battery through BMS. The target voltage information can include the voltage value of the above-mentioned low-voltage battery and the interval length from the last charging of the low-voltage battery to the end. As for the method of obtaining the target voltage information, it can be specifically divided into the following multiple methods.

[0048] In one embodiment, the BMS of the electric vehicle can monitor the voltage value of the low-voltage battery when the low-voltage battery ends charging, and use the monitored voltage value and the corresponding monitoring duration as the target voltage information. Among them, the BMS can perform the above monitoring behavior at the moment when the low-voltage battery ends charging, and the voltage value of the low-voltage battery and the current monitoring duration can be periodically collected at preset monitoring intervals during the monitoring process as the target voltage information, thereby saving certain monitoring resources. For example: when the time interval of the above monitoring process is 30 minutes, then at the 30th minute after the low-voltage battery ends charging, the corresponding voltage value and the monitoring duration "30 minutes" can be recorded as a target voltage information, at the 60th minute after the low-voltage battery ends charging, the corresponding voltage value and the monitoring duration "60 minutes" can be recorded as another target voltage information, at the 90th minute after the low-voltage battery ends charging, ..., and so on. In this embodiment, the voltage value of the low-voltage battery can be obtained on the basis of a determined and orderly interval duration, so as to facilitate the matching with the above abnormal charging conditions.

[0049] In another embodiment, when the above-mentioned low-voltage battery ends charging, the BMS of the electric vehicle can respond to the target operation triggered by the user for the above-mentioned low-voltage battery, and use the voltage value of the above-mentioned low-voltage battery and the interval time between the above-mentioned target operation and the last charging of the above-mentioned low-voltage battery as the above-mentioned target voltage information. Among them, the target operation triggered by the user includes but is not limited to the vehicle start operation, the low-voltage electrical equipment power supply operation, etc. For example, the user starts the air conditioner in the car through the low-voltage battery in situ at the 10th minute after the low-voltage battery is charged, and wakes up the power battery system through the low-voltage battery to start the vehicle at the 60th minute after the charging ends. Then, the BMS can obtain the target voltage information twice. The target voltage information obtained for the first time includes the voltage value of the low-voltage battery when the air conditioner is started and the interval time "10 minutes", and the target voltage information obtained for the second time includes the voltage value of the low-voltage battery when the vehicle is started and the interval time "60 minutes". Compared with the previous embodiment, the voltage value of the low-voltage battery obtained in this embodiment does not correspond to the determined interval time, but is random with the time point of the target operation performed by the user. Those skilled in the art will understand that, although the present embodiment effectively eliminates the active monitoring process of the BMS and the corresponding resource costs, due to the uncontrollability of the user's execution of the target operation, there may still be special circumstances where the interval duration of the target voltage information obtained is concentrated within a certain time period, resulting in the interval duration being unable to evenly cover the entire stage after the charging is completed, such as the low-voltage battery being charged again or the interval duration from the last charging completion exceeding the preset maximum duration threshold, thereby affecting the accuracy of abnormal detection of the above-mentioned low-voltage battery to a certain extent.

[0050] It should be noted that the above-mentioned situation where the low-voltage battery ends charging refers to the situation where the low-voltage battery naturally cuts off power after its capacity reaches the corresponding preset maximum value, and does not include the special situation where the charging process is forcibly terminated due to factors such as human intervention. In addition, the units of the voltage value and interval time of the above-mentioned target voltage information can be set and converted according to actual needs, and this manual does not limit this.

[0051] Step S204, when the target voltage information matches the target abnormal charging condition, charging the low voltage battery, and increasing the cumulative value of the target abnormal condition corresponding to the target abnormal charging condition.

[0052] After the BMS obtains the target voltage information, it can match the target voltage information with the abnormal charging conditions of each abnormal situation, and charge the low-voltage battery when the target voltage information successfully matches the target abnormal charging conditions, and increase the cumulative value of the target abnormal situation corresponding to the target abnormal charging conditions. The target abnormal charging conditions may be: the interval duration is a preset duration and the voltage value is less than a first preset voltage value; and / or the interval duration matches a preset duration range and the voltage value is less than a second preset voltage value corresponding to the interval duration, and the interval duration is negatively correlated with the second preset voltage value.

[0053] Taking the target voltage information of "10.5V" and "60 minutes" as an example, on one hand, the target abnormal charging condition matching the target voltage information may be, for example, "the above interval is 60 minutes and the above voltage value is less than 11V". In this example, 60 minutes is the above preset duration, and 11V is the above first preset voltage value. Correspondingly, the abnormal charging condition that does not match the target voltage information may be, for example, "the above interval is 60 minutes and the above voltage value is less than 10.4V", "the above interval is 80 minutes and the above voltage value is less than 11V". On the other hand, the target abnormal charging condition that matches the target voltage information may be, for example, "the above-mentioned interval duration matches 50 minutes to 70 minutes and the above-mentioned voltage value is less than 11.5V corresponding to the above-mentioned interval duration". In this example, 50 minutes to 70 minutes is the above-mentioned preset duration range, and 11.5V is the second preset voltage value corresponding to the above-mentioned interval duration "60 minutes", wherein the above-mentioned interval duration and the above-mentioned second preset voltage value may be said to be negatively correlated, for example, when the interval duration of the above-mentioned target voltage information increases to 65 minutes, the above-mentioned second preset voltage value may be reduced to 11.3V, and when the interval duration of the above-mentioned target voltage information is shortened to 55 minutes, the above-mentioned second preset voltage value may be increased to 11.7V. Correspondingly, the abnormal charging condition that does not match the target voltage information may be, for example, "the above-mentioned interval duration is 30 minutes to 50 minutes and the above-mentioned voltage value is less than 11.8V", "the above-mentioned interval duration is 50 minutes to 70 minutes and the above-mentioned voltage value is less than 10.4V". The corresponding relationship between the interval time and the value of the second preset voltage value can be calculated according to a preset function formula, and this specification does not limit this.

[0054] The above-mentioned target voltage information can match multiple target abnormal charging conditions. The arrangement order of different target abnormal charging conditions can be determined according to parameters such as preset priority or creation time. When the first target abnormal charging condition is matched, the BMS can first charge the low-voltage battery, and at the same time increase the cumulative value of the target abnormal situation corresponding to the above-mentioned first target abnormal charging condition. Then, according to the preset configuration, you can choose to stop matching or continue matching. If you continue to match, then when the nth target abnormal charging condition is matched, the cumulative value of the target abnormal situation corresponding to the above-mentioned nth target abnormal charging condition is increased, where n is a positive integer greater than 1.

[0055] This specification also provides different implementation methods for the above-mentioned charging method for the low-voltage battery.

[0056] In one embodiment, the BMS can charge the above-mentioned low-voltage battery for a first preset charging time. Among them, the BMS only needs to manage the charging time for the low-voltage battery, and there is no need to obtain additional parameters. It should be noted that since the situation where the above-mentioned low-voltage battery ends charging refers to the situation where the low-voltage battery is naturally powered off after the capacity reaches the corresponding preset maximum value, the above-mentioned low-voltage battery should meet the requirement of increasing from the voltage value of the above-mentioned target voltage information to the maximum voltage value corresponding to the above-mentioned preset maximum value within the above-mentioned first preset charging time. As for the correspondence between the above-mentioned first preset charging time and the voltage value of the above-mentioned target voltage information, it can be set by the manufacturer of the electric vehicle according to the specific model and driving conditions.

[0057] In another embodiment, the BMS may charge the low-voltage battery until the voltage value of the low-voltage battery reaches a third preset voltage value or the charging time is greater than the second preset charging time. In addition to controlling the charging time of the low-voltage battery, the BMS also needs to obtain the voltage value of the low-voltage battery. This method only requires that the capacity of the low-voltage battery reaches the corresponding preset maximum value through charging, which is suitable for the situation where the first preset charging time is uncertain. In addition, the second preset charging time can be set to the maximum theoretical time required for the low-voltage battery to complete charging. If the charging time is greater than the second preset charging time and the voltage value of the low-voltage battery has not yet reached the third preset voltage value, the subsequent step S206 can be ignored, and it is directly determined that the low-voltage battery has an abnormality.

[0058] Combine the following Figure 3 The charging modules of the power battery and the low-voltage battery are described below. Figure 3As shown, when the power battery can charge the low-voltage battery through the DC / DC converter, the two lines K1 and K2 involved refer to the high-voltage positive and negative relay lines. The function of these two lines is to control the connection and disconnection of the high-voltage direct current between the power battery and the low-voltage battery during the charging process. Obviously, when K1 and K2 are closed, the power battery can charge the low-voltage battery through the DC / DC converter; when K1 and K2 are disconnected, the low-voltage battery ends charging, and at this time the battery management information BMS in the power battery can be connected to the low-voltage battery to monitor the target voltage information of the low-voltage battery.

[0059] Step S206, determining a corresponding target cumulative value according to the cumulative value of the target abnormal situation, and determining that the low-voltage battery is abnormal when the target cumulative value is greater than a target abnormal cumulative threshold corresponding to the target abnormal situation.

[0060] After increasing the cumulative value of the target abnormal situation, the BMS can determine the corresponding target cumulative value based on the cumulative value. If the above target cumulative value is greater than the above target abnormality cumulative threshold, it can be said that the above low-voltage battery has experienced the target abnormal situation a corresponding number of times. Specifically, when the above cumulative value increment remains unchanged, the above target abnormality cumulative threshold is positively correlated with the number of target abnormal situations that need to be triggered to determine the above low-voltage battery abnormality.

[0061] In the present application, the above target cumulative value can be determined by the cumulative value of one or more abnormal situations.

[0062] In one embodiment, the BMS can directly use the cumulative value of the target abnormal situation as the target cumulative value. At this time, the target cumulative value corresponds to the number of times the target abnormal situation occurs in the low-voltage battery. The target abnormal cumulative threshold is the abnormal cumulative threshold of the target abnormal situation itself. Therefore, when the target cumulative value is greater than the abnormal cumulative threshold corresponding to the target abnormal situation, the low-voltage battery abnormality can be determined. Still taking the target abnormal situation where the abnormal charging condition is "the above interval is 60 minutes and the above voltage value is less than 11V" as an example, assuming that the target voltage information obtained matches the target abnormal charging condition once, the target abnormal situation will occur once, and its cumulative value can also be increased once. If the increment of the cumulative value is 1, and the abnormal cumulative threshold of the target abnormal situation is 4, it means that as long as the target abnormal situation occurs 5 times cumulatively, the low-voltage battery abnormality is determined.

[0063] In another embodiment, the low-voltage battery may correspond to a plurality of abnormal conditions, and a complex condition after at least a portion of the abnormal conditions including the target abnormal condition is combined with a corresponding abnormal accumulation threshold. The target cumulative value at this time can be calculated based on the cumulative values ​​of each abnormal condition in the complex condition, and the target abnormal accumulation threshold will also be used as the abnormal accumulation threshold of the complex condition for comparison with the target cumulative value. Among them, the above-mentioned abnormal conditions can be configured with the same or different cumulative value weights. The above-mentioned target cumulative value can be obtained by weighted calculation of the cumulative values ​​of at least part of the above-mentioned abnormal conditions. For example, a complex situation includes a first abnormal situation in which the abnormal charging condition is "the above-mentioned interval duration is 60 minutes and the above-mentioned voltage value is less than 11V", and a second abnormal situation in which the abnormal charging condition is "the above-mentioned interval duration is 30 minutes and the above-mentioned voltage value is less than 11.5V". Assuming that the abnormal cumulative thresholds of both are 9 and the cumulative values ​​are 8, the target cumulative value calculation method according to the previous embodiment will cause the BMS to be unable to determine the low-voltage battery abnormality, but further assuming that the weights of the above-mentioned first abnormal condition and the second abnormal condition are 1 respectively, and the abnormal cumulative threshold corresponding to the complex situation is 15, then the above-mentioned target cumulative value can be determined as 16 (8*1+8*1). At this time, the above-mentioned target cumulative value is greater than the above-mentioned abnormal cumulative threshold, so the above-mentioned low-voltage battery abnormality can be determined.

[0064] It can be understood that the above two embodiments can act simultaneously on the accumulated value of the above target abnormal situation according to actual needs to improve the accuracy of determining the above low-voltage battery abnormality.

[0065] After determining that the low-voltage battery is abnormal, the corresponding abnormal prompt information can be sent to the instrument and / or the central control screen of the vehicle. When the vehicle is started, the instrument and / or the central control screen of the vehicle can push relevant information to remind the user to maintain and replace the low-voltage battery in time; in addition, the battery abnormality prompt information can be sent to the user terminal and / or the after-sales platform of the above-mentioned electric vehicle through the vehicle-mounted telematics processing terminal (Telematics BOX, T-BOX), wherein T-BOX can send the above-mentioned battery abnormality information to the user's mobile phone application (Application, APP), and then the APP pushes the information of the abnormal performance of the low-voltage battery to the user, reminding the owner to go to the after-sales service in time to check and maintain the low-voltage battery; or T-BOX can send the vehicle identification number (VIN) of the above-mentioned electric vehicle to the after-sales data platform. The after-sales data platform retrieves the user's contact information according to the vehicle VIN code, and then the after-sales staff contacts the user to go to the maintenance point in time to maintain and replace the low-voltage battery. After processing, the accumulated value of all abnormal situations can be reset to avoid the occurrence of repeated false alarms of abnormalities.

[0066] The following is still combined Figure 3 The abnormal alarm module of the power battery and the low-voltage battery is described. Figure 3 As shown, the BMS of the power battery can be connected to the instrument panel, the central control screen and the T-BOX of the electric vehicle respectively and transmit the corresponding battery abnormality prompt information. After receiving the above information, the T-BOX can further forward it to the user's mobile phone APP or after-sales data platform.

[0067] Figure 4 is a flow chart of another method for detecting abnormality of a low-voltage battery shown in an embodiment disclosed in the present invention; Figure 3 and Figure 4 As shown, the method is applied to an electric vehicle, wherein the electric vehicle maintains a cumulative value of the low-voltage battery corresponding to at least one abnormal situation, and each abnormal situation is configured with a corresponding abnormal charging condition and an abnormal cumulative threshold, and specifically includes the following steps.

[0068] Step S402: BMS disconnects K1 and K2.

[0069] In one embodiment, the BMS may disconnect the K1 and K2 relays when the power battery of the electric vehicle finishes charging the low-voltage battery.

[0070] Step S404: The BMS monitors and obtains the voltage value of the low-voltage battery.

[0071] In one embodiment, the BMS can monitor the voltage value of the low-voltage battery, and use the monitored voltage value and the corresponding monitoring time as the target voltage information of the low-voltage battery. Assume that the voltage value of the target voltage information is 10.5V and the monitoring time is 2 hours.

[0072] Step S406 , the BMS determines whether the voltage value of the low-voltage battery is less than V1 when the interval time from the last charging is T1 .

[0073] In one embodiment, there is an abnormal charging condition in which an abnormal situation exists: the interval length is T1 and the voltage value is less than V1, wherein, assuming that the above T1 is 2 hours and V1 is greater than 10.5V, then the above target voltage information matches the target abnormal charging condition, and step S410 can be executed; assuming that V1 is less than 10.5V, then the above target voltage information does not match the target abnormal charging condition, and step S408 can be executed.

[0074] Step S408: The BMS enters sleep mode.

[0075] In one embodiment, since the target voltage information does not match the target abnormal charging condition, the low-voltage battery does not have any abnormal situation, and there is no need to determine whether the low-voltage battery is abnormal.

[0076] In step S410 , the BMS adds 1 to the accumulated value of the corresponding target abnormal situation.

[0077] In one embodiment, since the target voltage information matches the target abnormal charging condition, it can be determined that a target abnormal situation has occurred in the low-voltage battery. At this time, the BMS can add 1 to the counter value corresponding to the target abnormal situation.

[0078] In step S412, the BMS determines whether the cumulative value of the target abnormal situation is greater than N.

[0079] In one embodiment, if the BMS determines that the counter value corresponding to the target abnormal condition, that is, its cumulative value is greater than the abnormality cumulative threshold N of the target abnormal condition as the target abnormality cumulative threshold, then step S414 can be executed, otherwise step S416 can be executed.

[0080] Step S414, determining that the low-voltage battery is abnormal.

[0081] In one embodiment, since the cumulative value of the target abnormality is greater than the target abnormality cumulative threshold N, the BMS can determine that the low-voltage battery is abnormal, and send the battery abnormality information to the user's mobile phone APP through TBOX. The APP then pushes the information of the performance abnormality of the low-voltage battery to the car owner, thereby reminding the car owner to go to the after-sales service in time to check and maintain the battery.

[0082] Step S416, charging the low voltage battery.

[0083] In one embodiment, regardless of whether the performance of the low-voltage battery is abnormal, the low-voltage battery can be charged to ensure that the capacity of the low-voltage battery is sufficient.

[0084] Step S418: whether the charging time reaches T2.

[0085] In one embodiment, when the charging time reaches a preset T2, such as 3 hours, the BMS can terminate the charging of the low-voltage battery by disconnecting the K1 and K2 relays. Of course, if T2 is not reached, the charging state can continue.

[0086] Figure 5 is a schematic structural diagram of an electronic device shown in an embodiment of the present invention. Figure 5At the hardware level, the device includes a processor 501, a network interface 502, a memory 503, a non-volatile memory 504, and an internal bus 505, and may also include hardware required for other services. One or more embodiments of the present invention may be implemented based on software, such as the processor 501 reading the corresponding computer program from the non-volatile memory 504 to the memory 503 and then running it. Of course, in addition to the software implementation, one or more embodiments of the present invention do not exclude other implementations, such as logic devices or a combination of software and hardware, etc., that is, the execution subject of the following processing flow is not limited to each logic unit, but may also be hardware or logic devices.

[0087] Figure 6 The block diagram of a low-voltage battery abnormality detection device shown in an embodiment of the present invention. Figure 6 The device is applied to an electric vehicle, wherein the electric vehicle maintains a cumulative value of the low-voltage battery corresponding to at least one abnormal situation, and each abnormal situation is configured with a corresponding abnormal charging condition and an abnormal cumulative threshold. The device comprises:

[0088] A target voltage information acquisition unit 602 is used to acquire target voltage information of the low voltage battery;

[0089] The cumulative value increasing unit 604 is used to charge the low voltage battery when the target voltage information matches the target abnormal charging condition, and to increase the cumulative value of the target abnormal condition corresponding to the target abnormal charging condition;

[0090] The low-voltage battery abnormality determination unit 606 is used to determine a corresponding target cumulative value according to the cumulative value of the target abnormality, and determine the low-voltage battery abnormality when the target cumulative value is greater than a target abnormality cumulative threshold corresponding to the target abnormality.

[0091] Optionally, the target voltage information includes: the voltage value of the low-voltage battery and the interval time from the end of the last charging.

[0092] Optionally, the target voltage information acquiring unit 602 is specifically configured to:

[0093] When the low-voltage battery is finished charging, the voltage value of the low-voltage battery is monitored, and the monitored voltage value and the corresponding monitoring duration are used as the target voltage information; or,

[0094] When the low-voltage battery finishes charging, in response to a target operation triggered by a user for the low-voltage battery, the voltage value of the low-voltage battery and the interval time between the target operation and the last charging end of the low-voltage battery are used as the target voltage information.

[0095] Optionally, the target abnormal charging condition is:

[0096] The interval duration is a preset duration and the voltage value is less than a first preset voltage value; and / or,

[0097] The interval duration matches a preset duration range and the voltage value is less than a second preset voltage value corresponding to the interval duration, and the interval duration is negatively correlated with the second preset voltage value.

[0098] Optionally, the cumulative value increasing unit 604 is specifically configured to:

[0099] charging the low-voltage battery for a first preset charging time; or,

[0100] The low-voltage battery is charged until the voltage value of the low-voltage battery reaches a third preset voltage value or the charging time is longer than the second preset charging time.

[0101] Optionally, the low-voltage battery corresponds to multiple abnormal conditions, and a complex condition after at least a part of the abnormal conditions including the target abnormal condition among the multiple abnormal conditions is configured with a corresponding abnormal accumulation threshold; the low-voltage battery abnormality determination unit 606 is specifically used to:

[0102] The cumulative value of the target abnormal situation is used as the target cumulative value; or,

[0103] The target cumulative value is calculated according to the cumulative values ​​of each abnormal situation in the complex situation.

[0104] Optionally, the device further comprises:

[0105] A battery abnormality prompt information sending unit, used to send abnormality prompt information for the low-voltage battery to the instrument panel and / or the vehicle central control screen; and / or,

[0106] The battery abnormality prompt information is sent to the user terminal and / or the after-sales platform of the electric vehicle through the vehicle-mounted remote information processing terminal.

[0107] Based on the same concept as the above method, this specification also provides an electronic device, including: a processor; a memory for storing processor executable instructions; wherein the processor implements the steps of the method described in any of the above embodiments by running the executable instructions.

[0108] Based on the same concept as the above method, this specification also provides a computer-readable storage medium on which computer instructions are stored. When the instructions are executed by a processor, the steps of the method described in any of the above embodiments are implemented.

[0109] Based on the same concept as the above method, this specification also provides a computer program product, including a computer program / instruction, which implements the steps of the method described in any of the above embodiments when executed by a processor.

[0110] Although the present invention includes many specific implementation details, these should not be interpreted as limiting the scope of any invention or the scope of protection claimed, but are mainly used to describe the features of the specific embodiments of specific inventions. Certain features described in multiple embodiments of the present invention may also be implemented in combination in a single embodiment. On the other hand, the various features described in a single embodiment may also be implemented separately in multiple embodiments or in any suitable sub-combination. In addition, although features may work in certain combinations as described above and even initially claimed as such, one or more features from the claimed combination may be removed from the combination in some cases, and the claimed combination may point to a sub-combination or a variation of a sub-combination.

[0111] Similarly, although operations are depicted in a particular order in the accompanying drawings, this should not be understood as requiring that these operations be performed in the particular order shown or performed sequentially, or requiring that all illustrated operations be performed to achieve the desired results. In some cases, multitasking and parallel processing may be advantageous. In addition, the separation of various system modules and components in the above-described embodiments should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated together in a single software product, or packaged into multiple software products.

[0112] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the particular order or sequential order shown to achieve the desired results. In some implementations, multitasking and parallel processing may be advantageous.

[0113] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for detecting abnormality of a low-voltage battery, characterized in that: Applied to electric vehicles, the electric vehicles maintain the cumulative value of the low-voltage battery corresponding to at least one abnormal situation, and each abnormal situation is configured with a corresponding abnormal charging condition and abnormal cumulative threshold; the method includes: Acquiring target voltage information of the low-voltage battery; When the target voltage information matches the target abnormal charging condition, charging the low voltage battery, and increasing the cumulative value of the target abnormal condition corresponding to the target abnormal charging condition; A corresponding target cumulative value is determined according to the cumulative value of the target abnormal situation, and when the target cumulative value is greater than a target abnormal cumulative threshold corresponding to the target abnormal situation, it is determined that the low-voltage battery is abnormal.

2. The method according to claim 1, characterized in that The target voltage information includes: the voltage value of the low-voltage battery and the interval time from the last charging to the end.

3. The method according to claim 2, characterized in that The obtaining target voltage information of the low-voltage battery includes: When the low-voltage battery is finished charging, the voltage value of the low-voltage battery is monitored, and the monitored voltage value and the corresponding monitoring duration are used as the target voltage information; or, When the low-voltage battery finishes charging, in response to a target operation triggered by a user for the low-voltage battery, the voltage value of the low-voltage battery and the interval time between the target operation and the last charging end of the low-voltage battery are used as the target voltage information.

4. The method according to claim 2, characterized in that: The target abnormal charging condition is: The interval duration is a preset duration and the voltage value is less than a first preset voltage value; and / or, The interval duration matches a preset duration range and the voltage value is less than a second preset voltage value corresponding to the interval duration, and the interval duration is negatively correlated with the second preset voltage value.

5. The method according to claim 1, wherein charging the low-voltage battery comprises: Charging the low-voltage battery for a first preset charging time; or, The low-voltage battery is charged until the voltage value of the low-voltage battery reaches a third preset voltage value or the charging time is longer than the second preset charging time.

6. The method according to claim 1, characterized in that The low-voltage battery corresponds to a plurality of abnormal conditions, and a complex condition formed by combining at least a part of the abnormal conditions including the target abnormal condition among the plurality of abnormal conditions is configured with a corresponding abnormal accumulation threshold; The determining a corresponding target cumulative value according to the cumulative value of the target abnormal situation includes: taking the cumulative value of the target abnormal conditions as the target cumulative value; or, The target cumulative value is calculated according to the cumulative values ​​of each abnormal situation in the complex situation.

7. The method according to claim 1, characterized in that The method further comprises: Sending abnormal prompt information about the low-voltage battery to the instrument panel and / or the vehicle central control screen; and / or, The battery abnormality prompt information is sent to the user terminal and / or the after-sales platform of the electric vehicle through the vehicle-mounted remote information processing terminal.

8. A computer-readable storage medium, characterized in that: Computer instructions are stored thereon, and when the instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer program product, characterized in that The method comprises a computer program / instruction, which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 7.

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