Liquid leakage detection equipment and liquid leakage detection system of power battery

Abstract

The utility model discloses liquid leakage detection equipment and a liquid leakage detection system of a power battery, and relates to the technical field of battery detection, and the liquid leakage detection equipment of the power battery comprises a liquid leakage detection module, a control module and a communication connection module, wherein the liquid leakage detection module is used for acquiring liquid leakage information of the power battery, determining whether liquid leakage occurs in the power battery based on the liquid leakage information, and generating a liquid leakage result; the control module is used for processing the liquid leakage result to determine a processing result and generating a control instruction based on the processing result; the bus communication module is used for sending the control instruction to the power battery, so that the power battery is controlled and managed based on the control instruction; the Bluetooth communication module is used for determining the working state of the control module, and when the control module works abnormally, a liquid leakage result is obtained and sent to the user equipment, so that the user equipment masters the liquid leakage state of the power battery in real time according to the liquid leakage result. According to the technical scheme of the utility model, battery leakage detection is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a leakage detection device and a leakage detection system for a power battery. Background Art

[0002] With the development of new energy, the use of electric vehicles is becoming more and more common, and the safety of power batteries during use has also become a major concern.

[0003] At present, the safety inspection of power batteries is mainly to determine whether there is electrolyte leakage in the power battery. Usually, the leakage monitoring plan is integrated into the whole vehicle system, which is extremely dependent on the power supply of the new energy vehicle itself and the communication method of the vehicle itself. When the owner does not use the car for a long time due to other reasons and the battery itself is exhausted, or the MCU control unit of the battery management fails, if the battery pack has a leakage problem at this time, the owner will not be able to know about it, which brings inconvenience and safety hazards to people. Utility Model Content

[0004] The utility model provides a leakage detection device and a leakage detection system for a power battery, which solves the problem that the existing power supply method relies on the new energy vehicle itself and the communication method of the vehicle itself. When the vehicle battery itself is exhausted due to other reasons, the owner cannot be informed of the leakage problem of the power battery. The utility model realizes the Bluetooth connection between the power battery and the user equipment. When the power of the vehicle itself is completely exhausted or the control module has an abnormality, the Bluetooth communication module starts to work. When the user equipment is connected by Bluetooth, the leakage situation of the power battery is sent to the user equipment, thereby improving the user experience and improving the user's safety.

[0005] According to one aspect of the utility model, the utility model provides a leakage detection device for a power battery, the leakage detection device for the power battery of the device comprises: a leakage detection module, a control module and a communication connection module, the communication connection module comprises a Bluetooth communication module and a bus communication module; the control module is respectively connected to the leakage detection module and the bus communication module for communication, and the Bluetooth communication module is respectively connected to the control module and the leakage detection module for Bluetooth; wherein,

[0006] The leakage detection module is used to obtain leakage information of the power battery, determine whether the power battery is leaking based on the leakage information, and generate a leakage result;

[0007] The control module is used to process the leakage result to determine the processing result, and generate a control instruction based on the processing result;

[0008] The bus communication module is used to send the control instruction to the power battery, so that the power battery controls and manages the power battery based on the control instruction;

[0009] The Bluetooth communication module is used to determine the working status of the control module. When the control module works abnormally, the leakage result is obtained and sent to the user device, so that the user device can grasp the leakage status of the power battery in real time according to the leakage result.

[0010] Optionally, the leakage detection module includes a transceiver and at least two leakage detection sensors; the transceiver is communicatively connected to the control module and the at least two leakage detection sensors respectively; wherein the transceiver is used to send the leakage results obtained by the at least two leakage detection sensors to the control module; the at least two leakage detection sensors are used to obtain the leakage information of the power battery, and determine whether the power battery is leaking according to the leakage information, and generate a leakage result.

[0011] Optionally, the liquid leakage detection sensor is a hydrogen sensor or a pressure sensor.

[0012] Optionally, the Bluetooth communication module includes a Bluetooth chip, a Bluetooth control unit and a button battery; the Bluetooth chip is connected to the control module via Bluetooth, the Bluetooth chip is connected to the Bluetooth control unit for communication, and the button battery is electrically connected to the Bluetooth chip and the Bluetooth control unit, respectively; wherein, the Bluetooth chip is used to put the Bluetooth communication module in a low-power working state; the Bluetooth control unit is used to control the Bluetooth chip to communicate with the control module, and synchronously save the processing results of the control module; the button battery is used to provide power for the Bluetooth control unit and the Bluetooth chip.

[0013] Optionally, the leakage detection module is also used to determine the leakage position of the power battery according to the leakage information to achieve leakage positioning.

[0014] Optionally, the control module is also used to detect the voltage value and current value of the power battery.

[0015] Optionally, it also includes: an alarm module; the alarm module is communicatively connected to the control module, and the alarm module is connected to the Bluetooth communication module via Bluetooth; wherein the alarm module is used to send out an alarm message when a leakage failure occurs in the power battery.

[0016] Optionally, it also includes: a power supply module; the power supply module is electrically connected to the control module, the alarm module, the leakage detection module and the bus communication module respectively; wherein the power supply module is used to provide power for the control module, the alarm module, the leakage detection module and the bus communication module.

[0017] Optionally, the communication connection module is also used to receive a control strategy sent by a user device; wherein the control strategy is used to perform health management on the power battery.

[0018] According to one aspect of the utility model, the utility model provides a power battery leakage detection system, characterized in that it comprises: any power battery leakage detection device described in the utility model, a power battery and a user device.

[0019] According to the technical solution of the utility model, the leakage detection device of the power battery comprises: a leakage detection module, a control module and a communication connection module, the communication connection module comprises a Bluetooth communication module and a bus communication module; the control module is respectively communicated with the leakage detection module and the bus communication module, and the Bluetooth communication module is respectively connected with the control module and the leakage detection module via Bluetooth; wherein the leakage detection module is used to obtain leakage information of the power battery, determine whether the power battery is leaking based on the leakage information, and generate a leakage result; the control module is used to process the leakage result to determine the processing result, and generate a control instruction based on the processing result; the bus communication module is used to send the control instruction to the power battery, so that the power battery controls and manages the power battery based on the control instruction; the Bluetooth communication module is used to determine the working state of the control module, and when the control module is working abnormally, the leakage result is obtained and sent to the user device, so that the user device can grasp the leakage state of the power battery in real time according to the leakage result. The utility model determines the working state of the control module through the Bluetooth communication module. When the control module works abnormally, the leakage result is obtained and sent to the user device, so that the user device can grasp the leakage state of the power battery in real time according to the leakage result, and solves the existing communication mode that relies on the power supply of the new energy vehicle itself and the vehicle itself. When the owner does not use the vehicle for a long time due to other reasons and the battery of the vehicle itself is exhausted, the owner cannot know the leakage problem of the power battery, and realizes the Bluetooth connection between the power battery and the user device. When the power of the vehicle itself is completely exhausted or the control module is abnormal, the Bluetooth communication module starts to work, and the leakage situation of the power battery is sent to the user device when the user device is connected by Bluetooth, thereby improving the user experience and improving the user's safety.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1is a schematic structural diagram of a power battery leakage detection device provided in the first embodiment;

[0023] Figure 2 is a structural schematic diagram of a liquid leakage detection module provided in the first embodiment;

[0024] Figure 3 is a schematic diagram of the structure of a Bluetooth communication module provided in the first embodiment;

[0025] Figure 4 It is a structural schematic diagram of a power battery leakage detection system provided in the second embodiment.

[0026] Figure numerals: 1-liquid leakage detection device, 11-liquid leakage detection module, 111-transceiver, 112-liquid leakage detection sensor, 12-control module, 13-communication connection module, 131-Bluetooth communication module, 1311-Bluetooth chip, 1312-Bluetooth control unit, 1313-button battery, 132-bus communication module, alarm module 14 and power module 15. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Embodiment 1

[0030] Figure 1 is a schematic diagram of the structure of a power battery leakage detection device provided in the first embodiment. This embodiment is applicable to the case of power battery leakage detection. Figure 1 As shown, the leakage detection device 1 of the power battery of the utility model specifically includes: a leakage detection module 11, a control module 12 and a communication connection module 13, the communication connection module 13 includes a Bluetooth communication module 131 and a bus communication module 132; the control module 12 is respectively communicated with the leakage detection module 11 and the bus communication module 132, and the Bluetooth communication module 131 is respectively connected to the control module 12 and the leakage detection module 11 by Bluetooth.

[0031] Among them, the leakage detection module is used to obtain the leakage information of the power battery, determine whether the power battery is leaking based on the leakage information, and generate a leakage result; the control module is used to process the leakage result to determine the processing result, and generate a control instruction based on the processing result; the bus communication module is used to send the control instruction to the power battery, so that the power battery controls and manages the power battery based on the control instruction; the Bluetooth communication module is used to determine the working status of the control module. When the control module is working abnormally, the leakage result is obtained and sent to the user device, so that the user device can grasp the leakage status of the power battery in real time according to the leakage result.

[0032] Among them, the power battery is the core component of the new energy vehicle and the power source of the whole vehicle system of the new energy vehicle. The material of the power battery can be, for example, a lead-acid battery, a nickel-metal hydride battery, a lithium iron manganate battery, etc., which is not limited in this embodiment. The leakage information of the power battery is used to determine whether the power battery has leakage during operation or non-operation. The leakage information includes leakage frequency, leakage amount, leakage time, leakage location, etc. The leakage result is used to determine whether leakage has occurred. The leakage result includes leakage of the power battery, no leakage of the power battery, and potential leakage of the power battery. The processing result is the result of the control module processing the leakage result; the control instruction is an instruction generated according to the processing result, which is used to instruct the whole vehicle to control and manage the power battery, or instruct the user to perform health management on the power battery; the working state of the control module includes abnormal working state and normal working state. The abnormal working state means that the control module is working abnormally at this time, cannot work normally, and cannot communicate with the leakage detection module and the bus communication module; the normal working state means that the control module can work normally at this time.

[0033] Specifically, the leakage detection device of the power battery specifically includes a leakage detection module, a control module and a communication connection module, and the communication connection module includes a Bluetooth communication module and a bus communication module; the control module is respectively connected to the leakage detection module and the bus communication module in communication, and the Bluetooth communication module is respectively connected to the control module and the leakage detection module in Bluetooth. When it is necessary to detect whether the power battery of the new energy vehicle has a leakage fault, firstly, the leakage information of the power battery such as leakage frequency, leakage amount, leakage time, leakage position, etc. is obtained through the leakage detection module, and then based on the leakage information, it is determined whether the power battery has leaked, and a leakage result is generated, that is, when it is determined that the leakage frequency is less than the preset frequency and the leakage amount is less than the first preset amount, the leakage result is determined to be that the power battery has not leaked; when it is determined that the leakage frequency is greater than or equal to the preset frequency and / or the leakage amount is greater than or equal to the first preset amount, it is further determined whether the leakage amount is less than the second preset amount. If it is determined that the leakage amount is less than the second preset amount, the leakage result is determined to be that the power battery has a leakage hazard; if it is determined that the leakage amount is greater than or equal to the second preset amount, the leakage result is determined to be that the power battery has leaked. The preset frequency is a preset leakage frequency of the power battery, the first preset amount and the second preset amount are preset leakage amounts of the power battery, and the first preset amount is less than the second preset amount. The preset frequency, the first preset amount and the second preset amount are not limited in this embodiment. After the leakage result is determined, the leakage result is sent to the control module, and then the control module performs filtering processing on the leakage result to determine the processing result, and generates a control instruction based on the processing result. Different processing results correspond to different control instructions. For example, the processing result of the power battery leakage corresponds to the generation of a control instruction to control and manage the power battery leakage fault according to the processing result and send a reminder message to the user device. If the power battery is not leaking, continue to detect the power battery leakage in real time. If there is a potential leakage risk in the power battery, detect the power battery leakage in real time and send a reminder message to the user device. After determining the control instruction, the control instruction is sent to the power battery through the bus communication module, so that the power battery controls and manages the power battery based on the control instruction; when the control module is abnormal, it is impossible to communicate with the leakage detection module through the bus communication module. At this time, the working status of the control module is determined through the Bluetooth communication module. When the control module is working abnormally, the leakage result is obtained and sent to the user device, so that the user device can grasp the leakage status of the power battery in real time according to the leakage result.

[0034] In a specific embodiment, optionally, Figure 2 is a structural diagram of a liquid leakage detection module provided in the first embodiment. Figure 2 As shown, the liquid leakage detection module 11 includes a transceiver 111 and at least two liquid leakage detection sensors 112; the transceiver 111 is communicatively connected with the control module 12 and the at least two liquid leakage detection sensors 112 respectively.

[0035] The leakage detection sensor is a hydrogen sensor or a pressure sensor, which is not limited in this embodiment. There are at least two leakage detection sensors, and the advantage of such an arrangement is that accurate positioning detection of the battery pack of the power battery can be achieved.

[0036] The transceiver is used to interact with the control module, send the leakage information of the leakage detection unit to the control module, and inform the leakage detection module of the working status of the control module. The transceiver is used to send the leakage results obtained by at least two leakage detection sensors to the control module; at least two leakage detection sensors are used to obtain the leakage information of the power battery, and determine whether the power battery is leaking according to the leakage information, and generate a leakage result.

[0037] Specifically, the leakage detection module includes a transceiver and at least two leakage detection sensors; the transceiver is respectively connected to the control module and the at least two leakage detection sensors for communication. The transceiver is used to interact with the control module and send the leakage results obtained by the at least two leakage detection sensors to the control module; the at least two leakage detection sensors are used to obtain the leakage information of the power battery, determine whether the power battery is leaking according to the leakage information, and generate the leakage result, and at the same time, the working status of the control module can be notified to the leakage detection module.

[0038] For example, the analog front end (Analog Front End, AFE) of the leakage detection sensor of the leakage detection module adopts Infineon's TLE9012. TLE9012 is Infineon's 12-channel voltage acquisition chip, which supports 12-channel voltage acquisition and 5-channel negative temperature coefficient thermistor (Negative Temperature Coefficient Sensor, NTC). In addition to temperature acquisition, these NTC channels can also be used for external voltage analog to digital converter (analog to digital converter, ADC) acquisition. TLE9012 supports daisy chain communication mode, and the specific number of chips can be combined according to the power battery voltage of new energy vehicles. The transceiver adopts Infineon's TLE9015, which supports daisy chain transmission mode, supports two-channel isolated communication, and supports two-channel universal asynchronous receiver transmitter (UART) and micro control unit (MCU) communication. Furthermore, the main working principle of the leakage detection module is that when the leakage detection sensor detects leakage in the battery pack of the power battery, it feeds back a voltage value change to the NTC acquisition port of TLE9012. At this time, 9012 immediately sends the error information to the transceiver TLE9015 through ring communication, and TLE9015 transmits it to the control module through UART, and the control module makes corresponding alarm processing. Due to the integration of multiple leakage detection sensors, the leakage detection module can accurately locate which battery pack has leakage, which is convenient for subsequent investigation and maintenance.

[0039] In a specific implementation, optionally, the leakage detection module is further used to determine the leakage position of the power battery according to the leakage information to achieve leakage positioning.

[0040] The leakage location is the location of the battery pack where the power battery actually leaks.

[0041] Specifically, the leakage detection module is also used to determine the leakage position of the power battery according to the leakage information, so as to realize the leakage positioning of the battery pack of the power battery that is actually leaking.

[0042] In a specific embodiment, optionally, Figure 3 is a schematic diagram of the structure of a Bluetooth communication module provided in the first embodiment. Figure 3As shown, the Bluetooth communication module 131 includes a Bluetooth chip 1311, a Bluetooth control unit 1312 and a button battery 1313; the Bluetooth chip 1311 is connected to the control module 12 by Bluetooth, the Bluetooth chip 1311 is communicatively connected to the Bluetooth control unit 1312, and the button battery 1313 is electrically connected to the Bluetooth chip 1311 and the Bluetooth control unit 1312 respectively.

[0043] Among them, the Bluetooth chip is used to make the Bluetooth communication module work in a low-power state; the Bluetooth control unit is used to control the Bluetooth chip to communicate with the control module and synchronously save the processing results of the control module; the button battery is used to provide power for the Bluetooth control unit and the Bluetooth chip.

[0044] Specifically, the Bluetooth control unit is used to control the Bluetooth chip to communicate with the control module and synchronously save the processing results of the control module. When the working state of the control module is abnormal, the leakage detection module is connected to the Bluetooth communication module via Bluetooth. The Bluetooth chip puts the Bluetooth communication module in a low-power working state and sends the leakage results of the leakage detection module to the user device via the Bluetooth connection.

[0045] Furthermore, the button battery uses CR2032, with a power of 240 mAh, and the Bluetooth control unit uses TI's MSP430 with a minimum current of 0.1 microamperes. The Bluetooth chip uses Infineon's low-power Bluetooth chip CYW89820. Under normal circumstances, the entire Bluetooth communication module is working as the Bluetooth control unit (Bluetooth control unit and control module Bluetooth communication, as well as Bluetooth chip broadcast communication are all within 1 millisecond, which is negligible compared to the power consumption of the entire Bluetooth communication module), and the self-damage rate of the button battery is less than 10% within 10 years. In summary, the power consumption of the entire Bluetooth unit can exceed 15 years of working time under the maintenance of CR2032, which exceeds the scrap cycle of the entire vehicle. The wireless alarm function within the entire vehicle cycle can be realized.

[0046] For example, when the control module is in normal working condition, the Bluetooth communication module is in sleep mode, at which time the power consumption is the lowest. The Bluetooth control unit communicates with the control module once every 1 minute to synchronously save the leakage status of the power battery pack at this time and confirm whether the control module is working normally and whether the power battery vehicle has power. When the Bluetooth control unit does not receive a reply from the control module, it is confirmed that the power battery vehicle is either out of power or the control module has a fault. At this time, the Bluetooth control unit turns on the Bluetooth broadcast function and broadcasts once every minute to broadcast the current battery safety status of the power battery to the user device, and the user device can receive the leakage information through the Bluetooth connection.

[0047] In a specific implementation, optionally, the control module is also used to detect the voltage value and current value of the power battery.

[0048] Among them, the control module adopts Infineon's AURIX TC3 series MCU. This MCU supports the highest functional safety level of automotive danger, mainly for voltage, current and problem detection of power batteries and battery health management.

[0049] Specifically, the control module is also used to detect the voltage and current values ​​of the power battery, thereby realizing voltage, current and problem detection and battery health management of the power battery.

[0050] In a specific embodiment, optionally, the power battery leakage detection device further includes: an alarm module 14; the alarm module is communicatively connected to the control module, and the alarm module is Bluetooth-connected to the Bluetooth communication module.

[0051] Among them, the alarm module is used to send out an alarm message when a power battery leakage failure occurs.

[0052] Specifically, when a leakage fault is detected in the power battery, an alarm message is sent out through the alarm module to remind the user that the power battery has a leakage fault and to control and manage the power battery in a timely manner.

[0053] In a specific embodiment, optionally, the leakage detection device for a power battery further includes: a power module 15; the power module is electrically connected to the control module, the alarm module, the leakage detection module and the bus communication module respectively.

[0054] Among them, the power module is used to provide power for the control module, alarm module, leakage detection module and bus communication module.

[0055] Specifically, the power battery leakage detection device also includes: a power module, which is electrically connected to the control module, the alarm module, the leakage detection module and the bus communication module respectively to provide power for the control module, the alarm module, the leakage detection module and the bus communication module.

[0056] In a specific implementation, optionally, the communication connection module is further used to receive a control policy sent by the user equipment.

[0057] Among them, the control strategy is used to manage the health of the power battery.

[0058] Specifically, the communication connection module is also used to receive the control strategy sent by the user equipment, so that the whole vehicle of the power battery can manage the health of the power battery.

[0059] The advantage of this setting is that it can timely manage the health of the power battery and increase the service life of the power battery.

[0060] According to the technical solution of this embodiment, the leakage detection device of the power battery includes: a leakage detection module, a control module and a communication connection module, the communication connection module includes a Bluetooth communication module and a bus communication module; the control module is respectively communicated with the leakage detection module and the bus communication module, and the Bluetooth communication module is respectively connected with the control module and the leakage detection module by Bluetooth; wherein the leakage detection module is used to obtain leakage information of the power battery, determine whether the power battery is leaking based on the leakage information, and generate a leakage result; the control module is used to process the leakage result to determine the processing result, and generate a control instruction based on the processing result; the bus communication module is used to send the control instruction to the power battery, so that the power battery controls and manages the power battery based on the control instruction; the Bluetooth communication module is used to determine the working state of the control module, and when the control module is working abnormally, the leakage result is obtained and sent to the user device, so that the user device can grasp the leakage state of the power battery in real time according to the leakage result. On the basis of the above embodiments, the utility model determines the working state of the control module through the Bluetooth communication module. When the control module works abnormally, the leakage result is obtained and sent to the user device, so that the user device can grasp the leakage state of the power battery in real time according to the leakage result, so as to solve the existing communication mode that relies on the power supply of the new energy vehicle itself and the vehicle itself. When the owner does not use the vehicle for a long time due to other reasons and the battery of the vehicle itself is exhausted, the owner cannot know the leakage problem of the power battery, and realizes the Bluetooth connection between the power battery and the user device. When the power of the vehicle itself is completely exhausted or the control module is abnormal, the Bluetooth communication module starts to work, and the leakage situation of the power battery is sent to the user device when the user device is connected by Bluetooth, thereby improving the user experience and improving the user's safety.

[0061] Embodiment 2

[0062] Figure 4 is a schematic diagram of the structure of a power battery leakage detection system provided in the second embodiment; this embodiment is applicable to the case of power battery leakage detection. Figure 4 As shown, the power battery leakage detection system of the present invention specifically comprises: any power battery leakage detection device 1 described in the present invention, a power battery 2 and a user device 3.

[0063] The power battery leakage detection device is connected to the power battery and the user equipment respectively. The power battery leakage detection device is used to detect leakage faults of the power battery, and the user equipment is used to receive the leakage result after the power battery leakage detection device performs leakage detection on the power battery.

[0064] Specifically, the power battery leakage detection device is connected to the power battery and the user equipment respectively. After the power battery leakage detection device detects the leakage fault of the power battery, it determines the leakage result, and sends the leakage result to the user equipment by connecting with the user equipment, so that the user equipment can grasp the leakage situation of the power battery and improve the safety and service life of the power battery.

[0065] The technical solution of this embodiment is to connect the power battery and the user device respectively through the leakage detection device of the power battery. The leakage detection device of the power battery is used to detect the leakage fault of the power battery, and the user device is used to receive the leakage result after the leakage detection device of the power battery detects the leakage of the power battery. On the basis of the above embodiment, the utility model determines the leakage result after the leakage detection device of the power battery detects the leakage fault of the power battery, and sends the leakage result to the user device by connecting with the user device, so that the user device can grasp the leakage situation of the power battery and improve the safety and service life of the power battery.

[0066] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A power battery leakage detection device, characterized in that: include: A liquid leakage detection module, a control module and a communication connection module, wherein the communication connection module includes a Bluetooth communication module and a bus communication module; the control module is respectively connected to the liquid leakage detection module and the bus communication module for communication, and the Bluetooth communication module is respectively connected to the control module and the liquid leakage detection module for Bluetooth; wherein, The leakage detection module is used to obtain leakage information of the power battery, determine whether the power battery is leaking based on the leakage information, and generate a leakage result; The control module is used to process the leakage result to determine a processing result, and generate a control instruction based on the processing result; The bus communication module is used to send the control instruction to the power battery, so that the power battery controls and manages the power battery based on the control instruction; The Bluetooth communication module is used to determine the working state of the control module. When the control module works abnormally, the leakage result is obtained and sent to the user device, so that the user device can grasp the leakage state of the power battery in real time according to the leakage result.

2. The power battery leakage detection device according to claim 1, characterized in that: The leakage detection module includes a transceiver and at least two leakage detection sensors; the transceiver is respectively connected to the control module and at least two leakage detection sensors for communication; wherein, The transceiver is used to send the leakage results obtained by at least two leakage detection sensors to the control module; At least two of the leakage detection sensors are used to obtain leakage information of the power battery, determine whether the power battery is leaking according to the leakage information, and generate the leakage result.

3. The power battery leakage detection device according to claim 2, characterized in that: The liquid leakage detection sensor is a hydrogen sensor or a pressure sensor.

4. The power battery leakage detection device according to claim 1, characterized in that: The Bluetooth communication module includes a Bluetooth chip, a Bluetooth control unit and a button battery; the Bluetooth chip is connected to the control module by Bluetooth, the Bluetooth chip is connected to the Bluetooth control unit for communication, and the button battery is electrically connected to the Bluetooth chip and the Bluetooth control unit respectively; wherein, The Bluetooth chip is used to put the Bluetooth communication module into a low-power working state; The Bluetooth control unit is used to control the Bluetooth chip to communicate with the control module and synchronously save the processing result of the control module; The button battery is used to provide power for the Bluetooth control unit and the Bluetooth chip.

5. The power battery leakage detection device according to claim 1, characterized in that: The leakage detection module is also used to determine the leakage position of the power battery according to the leakage information to achieve leakage positioning.

6. The power battery leakage detection device according to claim 1, characterized in that: The control module is also used to detect the voltage value and current value of the power battery.

7. The power battery leakage detection device according to claim 1, characterized in that: Also includes: Alarm module; the alarm module is connected to the control module in communication, and the alarm module is connected to the Bluetooth communication module in Bluetooth; wherein, The alarm module is used to send out an alarm message when a leakage failure occurs in the power battery.

8. The power battery leakage detection device according to claim 7, characterized in that: Also includes: A power module; the power module is electrically connected to the control module, the alarm module, the leakage detection module and the bus communication module respectively; wherein, The power supply module is used to provide power to the control module, the alarm module, the liquid leakage detection module and the bus communication module.

9. The power battery leakage detection device according to claim 1, characterized in that: The communication connection module is also used to receive a control strategy sent by the user equipment; wherein the control strategy is used to perform health management on the power battery.

10. A power battery leakage detection system, characterized in that: include: A power battery leakage detection device, a power battery and a user device as described in any one of claims 1 to 9.

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