A Portable Battery Pack BMS Monitoring System and Its Monitoring Method

Abstract

The present invention belongs to the field of new energy technologies, in particular to a portable battery pack BMS monitoring system and its monitoring method. The system includes a protective housing, a BMS control main board disposed within the protective housing, a wireless positioning module for periodically refreshing location information to a user mobile terminal, a signal strength feedback module for synchronously detecting the signal strength of the wireless positioning module according to the location information, and an alarm module triggered by the wireless positioning module and the signal strength feedback module to generate an alarm message and send it to the user mobile terminal; wherein, a plurality of positive antenna elements of the wireless positioning module are provided and evenly arranged on the inner top surface of the protective cover, and the negative antenna element is the iron box housing of the battery pack. The alarm module includes a voice alarm unit and a smoke release warning unit; through the position and the weakening of the signal strength to trigger early warning and smoke release alarm, so as to simulate the spontaneous combustion situation caused by violent disassembly of the battery, and recently achieve a better anti-theft effect.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy, and particularly relates to a portable battery pack BMS monitoring system and a monitoring method thereof. Background Art

[0002] Due to the widespread existence of very serious traffic problems and automobile exhaust pollution problems in big cities, the pedal electric vehicle is an ideal small, medium-speed and short-distance daily transportation tool, and it has unique development conditions and broad application prospects in China. Compared with other batteries, lithium-ion batteries have the advantages of light weight, small volume, high average voltage, high energy density, large output power, high charging efficiency, no memory effect, long cycle life, wide operating temperature range, and small self-discharge, and are widely used in the field of pedal electric two-wheelers.

[0003] However, at present, due to the small size and light weight of the storage battery of the pedal electric vehicle, it is easy to be stolen. Although there are anti-theft measures in the industry at present, they only locate the battery and give voice warnings, and cannot further prevent the theft behavior of illegal thieves. Therefore, we propose a BMS monitoring system that can conduct more comprehensive anti-theft monitoring and management of the battery to meet the market needs. Summary of the Invention

[0004] The purpose of the present invention is to provide a portable battery pack BMS monitoring system and a monitoring method thereof to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A portable battery pack BMS monitoring system includes:

[0006] A protective shell, which is fixedly attached to the top surface of the iron box shell of the battery pack, and a power transmission plug adapted to the interface of the battery pack is provided at the bottom of the protective shell;

[0007] A BMS control main board, which is arranged in the protective shell and is connected to the battery pack through the power transmission plug;

[0008] A wireless positioning module, which is integrated on the BMS control main board and is used to regularly refresh the position information of the battery pack to the user mobile terminal; a plurality of positive antenna vibrators of the wireless positioning module are evenly arranged on the inner top surface of the protective shell, and the negative antenna vibrator is the iron box shell of the battery pack;

[0009] A signal strength feedback module, which is integrated on the BMS control main board and synchronously detects the signal strength of the wireless positioning module according to the refresh time of the position information;

[0010] An alarm module, integrated on the BMS control main board, is triggered by the wireless positioning module and the signal strength feedback module to generate alarm information and send it to the user mobile terminal;

[0011] Among them, the alarm module includes a voice alarm unit and a smoke release warning unit.

[0012] In the portable battery pack BMS monitoring system of the present invention, the position information includes regular position information corresponding to the unchanged position of the battery pack, and illegal position information corresponding to the illegal movement of the battery pack;

[0013] The alarm information includes a warning signal and an alarm signal;

[0014] Among them, the triggering of the alarm module by the wireless positioning module and the signal strength feedback module specifically includes:

[0015] When the illegal position information is detected, the wireless positioning module triggers the alarm module to generate the warning signal and send it to the user mobile terminal for warning;

[0016] When the detected signal strength is less than the set threshold, the signal strength feedback module triggers the alarm module to give a voice warning and a smoke release warning, and generates an alarm signal to send to the user mobile terminal for alarm.

[0017] In the portable battery pack BMS monitoring system of the present invention, the portable battery pack BMS monitoring system further includes a U-shaped handle, and the two arms of the U-shaped handle are longitudinally rotatably connected to the protective housing through two rotating components respectively.

[0018] In the portable battery pack BMS monitoring system of the present invention, the rotating component includes a rotating shaft vertically connected to the arm of the U-shaped handle, and a rotating seat for the fixed-axis rotation of the rotating shaft; a magnetic strip perpendicular to the plane where the two arms of the U-shaped handle are located is radially embedded in the rotating shaft, and a magnetic suction plate and a receiving groove adapted to the magnetic suction plate are provided on the bottom surface of the protective housing below the magnetic strip, and the depth of the receiving groove is greater than the thickness of the magnetic suction plate; when assembled in place, the lower part of the rotating shaft is flush with the upper end opening of the receiving groove, and the magnetic strip is in a vertical state and attracted to the magnetic suction plate.

[0019] The portable battery pack BMS monitoring system according to the present invention, wherein the magnetic attraction plate is an iron sheet; the portable battery pack BMS monitoring system further includes a closing trigger module for triggering the alarm module, and two trigger terminals of the closing trigger module are respectively arranged on the bottom surface of the accommodating groove. In the initial state, the magnetic attraction plate is separated from the two trigger terminals and attracted to the magnetic strip. In the trigger state, the magnetic strip rotates and is separated from the magnetic attraction plate, and the magnetic attraction plate conducts the two trigger terminals.

[0020] The portable battery pack BMS monitoring system according to the present invention, wherein a plurality of magnetic field detection elements are arranged on the rotating seat along the circumferential direction of the rotating shaft, and the magnetic field detection elements are used to trigger the alarm module to generate an alarm signal and send it to the user mobile terminal for alarm according to the number of times they are triggered.

[0021] The portable battery pack BMS monitoring system according to the present invention, wherein the rotating seat is detachably arranged on the bottom surface of the protective housing, a pressing seat for pressing down on the rotating seat is arranged on the inner top surface of the protective housing, a concave cavity is arranged on the lower end surface of the pressing seat, and the smoke release warning unit is arranged in the concave cavity.

[0022] The portable battery pack BMS monitoring system according to the present invention, wherein the protective housing includes a bottom plate and a protective cover covering the bottom plate; the BMS control main board is arranged on the bottom plate, an annular cofferdam is arranged on the inner top surface of the protective cover around the BMS control main board, and when assembled in place, the lower end of the annular cofferdam is hermetically attached to the upper surface of the bottom plate, and the rotating shaft is located outside the annular cofferdam.

[0023] The portable battery pack BMS monitoring system according to the present invention, wherein a release port for releasing smoke is arranged on a side wall of the concave cavity facing away from the annular cofferdam.

[0024] To achieve the above object, the present invention also provides the following technical solution: A monitoring method for a portable battery pack BMS monitoring system, the method includes the following steps:

[0025] Step 1: Refresh the current position of the battery pack within a first preset time through the wireless positioning module, and send the refreshed position information to the user mobile terminal, wherein the position information includes regular position information and illegal position information;

[0026] Step 2: Give a warning to the user according to the illegal position information;

[0027] Step 3: According to Step 2, detect the real-time signal strength of the wireless positioning module through the signal strength feedback module. If the real-time signal strength is less than the first preset signal strength, trigger the voice alarm unit of the alarm module to give a voice alarm warning;

[0028] Step 4: Continuously detect the real-time signal strength within the second preset time. If the real-time signal strength is less than the second preset signal strength, trigger the smoke release warning unit of the alarm module to release a smoke warning, where the value of the second preset signal strength is less than the value of the first preset signal strength.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] When the battery pack is illegally moved, it can give a warning to the user to indicate the risk of theft. Moreover, since the positive antenna elements of the positioning module are evenly arranged on the inner top surface of the protective housing, when the protective housing is illegally damaged by violence, the effective area of the positive antenna elements will be reduced, resulting in a decrease in the signal strength. At this time, if the detected signal strength continues to weaken, the alarm module will be further triggered, and the smoke release warning unit of the alarm module will release smoke to simulate the situation of spontaneous combustion when the battery is violently disassembled, making the thief think that the battery has been damaged due to spontaneous combustion during violent disassembly and has no theft value, thus terminating the theft behavior. Moreover, during the smoke release warning process, a corresponding prompt tone can also be broadcast through the voice alarm unit, further strengthening the psychological feeling of the thief to abandon the theft and making them leave the battery pack faster. In addition, through the dual confirmation operations of warning and alarm, the false alarm frequency caused by the position drift of the positioning signal can be greatly reduced, reducing the risk confirmation trouble and psychological pressure of the user, and greatly improving the user experience. Description of the Drawings

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic structural diagram of the portable battery pack BMS monitoring system of the present invention.

[0033] Figure 2 is Figure 1 explosion state diagram of

[0034] Figure 3 It is a bottom view of the protective cover of the portable battery pack BMS monitoring system of the present invention.

[0035] Figure 4 It is a bottom view of the protective cover of the portable battery pack BMS monitoring system of the present invention.

[0036] Figure 5 It is the bottom view of the floor of the portable battery pack BMS monitoring system of the present invention.

[0037] Figure 6 It is the longitudinal sectional view in the left - right direction of the portable battery pack BMS monitoring system of the present invention.

[0038] Figure 7 It is Figure 6 the structural diagram when the lifting handle in is rotated to the vertical state.

[0039] Figure 8 It is the structural schematic diagram of the control system of the portable battery pack BMS monitoring system of the present invention. Specific embodiments

[0040] The terms "first", "second", "third", "fourth", etc. in the description and claims of the present invention and the accompanying drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0041] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0042] "Plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0043] Moreover, the orientation terms such as "upper", "lower", "left", "right", "upper end", "lower end", "longitudinal", etc. are all referenced based on the attitude position of the device or equipment described in this solution during normal use.

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] This embodiment discloses a portable battery pack BMS monitoring system as shown in Figures 1 to 8 which can be applied to high-end intelligent electric vehicles, lithium battery management in the takeaway platform, shared electric vehicles, and other industrial application scenarios.

[0046] This system includes a protective housing 10, which is fixedly attached to the top surface of the iron box housing 500 of the battery pack. The protective housing 10 is generally fixed to the iron box housing 500 of the battery pack by four first bolts 20 at the four corners of its bottom. Further, a power supply plug 30 adapted to the interface of the battery pack is provided at the bottom of the protective housing 10, so that the battery can be directly electrically connected to the internal control components after assembly to realize the monitoring and control of various parameters.

[0047] Furthermore, this system also includes a BMS control main board 40, which is arranged on the inner bottom surface of the protective housing 10 and connected to the battery pack through the power supply plug 30. The BMS control main board 40 specifically supports multiple communication methods such as TTL / 485 / CAN, can adapt to the MODBUS communication protocol of all BMS protection boards in the industry, can also monitor the voltage and current data of each string of battery cells in real time, and also supports real-time temperature monitoring. Once a high-temperature warning occurs, it can control the cut-off of the battery MOS charge and discharge.

[0048] Furthermore, this system also includes a wireless positioning module 50, which supports LTE CAT1 and is backward compatible with 2G at the same time to ensure as few network blind spots as possible. The wireless positioning module 50 is specifically integrated on the BMS control main board 40. Of course, it can also be separately arranged on the inner top surface of the protective housing 10. The wireless positioning module 50 is used to periodically refresh the position information of the battery pack to the user mobile terminal. Multiple antenna positive oscillators 51 of the wireless positioning module 50 are evenly arranged on the inner top surface of the protective housing, so as to form a trigger area in the vulnerable top area of the protective housing 10. The antenna negative oscillator of the wireless positioning module 50 is the iron box housing 500 of the battery pack. When the protective housing 10 is illegally and violently damaged, it will also cause the antenna positive oscillator 51 to be damaged, resulting in a reduction in the effective radiation area of the antenna of the wireless positioning module 50. The reduction of this area will cause a weakening of the signal strength, and thus it can be indirectly known that the protective housing 10 is being illegally damaged.

[0049] The reference ground (i.e., the negative electrode) of the antenna positive oscillator 51 is formed on the iron box housing 500 of the battery pack, so that the antenna positive oscillator 51 of the wireless positioning module 50 and the iron box form a dipole antenna, that is, a low-frequency positioning module is formed, thereby ensuring the stability and penetration of the positioning signal; in order to ensure concealment and structural compactness, the signal feeding point of the wireless positioning module 50 is connected to the first bolt 20 connecting the iron box housing 500 through a connecting wire; compared with the traditional high-frequency positioning module, the negative electrode of the low-frequency antenna is made larger than the positive electrode, which can ensure the stability of signal radiation, enhance the penetration of the wireless positioning module 50, and ensure the positioning accuracy in some occasions with narrow space and complex environment.

[0050] Furthermore, the system further includes a signal strength feedback module 60, which is integrated on the BMS control main board 40. The signal strength feedback module 60 synchronously detects the signal strength of the wireless positioning module 50 according to the refresh time of the position information, so as to feedback the detected real-time signal to the control system for comparison with the standard signal strength. Through the comparison result, for example, if the detected signal strength suddenly is less than the standard value, it can be known at this time that the protective housing 10 is damaged, which is convenient for the next control operation.

[0051] Furthermore, the system further includes an alarm module 70, which is integrated on the BMS control main board 40 and is triggered by the wireless positioning module 50 and the signal strength feedback module 60 to generate an alarm message and send it to the user mobile terminal 600; that is, the wireless positioning module 50 is used to detect whether the position of the battery pack has changed. When it changes, the alarm module 70 is triggered to remind the user; in addition, if the position of the battery pack has not changed, since it is well-known that traditional battery packs have a positioning function, some illegal thieves will violently damage and open the BMS controller housing of the battery to destroy the controller to avoid alarming the user mobile terminal 600 when the position of the battery pack changes. In this solution, the antenna positive oscillators 51 of the wireless positioning module 50 are evenly arranged on the inner top wall of the protective housing 10, so that the alarm can be triggered when the protective housing 10 is damaged, thereby avoiding this illegal violent disassembly theft behavior and more effectively ensuring the property safety of users.

[0052] As is well-known, the size of the radiation area of the antenna is related to the signal strength. In the technical field, it is common knowledge to inversely know the damage of the effective area of the antenna by detecting the change in the size of the signal strength before and after. This solution will not be elaborated here.

[0053] Among them, the alarm module 70 includes a voice alarm unit 71 and a smoke release warning unit 72. The voice alarm unit 71 is used to broadcast local warning sounds. The broadcasting method can be offline voice broadcasting or online voice broadcasting, or a combination of online and offline methods; and the smoke release warning unit 72 is used to release smoke from the inside to the outside to simulate the spontaneous combustion of batteries to deter illegal dismantling personnel. In addition, the diffused smoke and the sound of the synchronous alarm can also attract the attention of passers-by around, further preventing theft.

[0054] In the actual alarm process, when the battery pack is illegally moved, the alarm module 70 cooperates with the wireless positioning module 50 to warn the user to remind the user that the battery pack is at risk of being stolen. Furthermore, since the positive antenna vibrator 51 of the positioning module is evenly arranged on the inner top surface of the protective shell 10, when the protective shell 10 is illegally and violently damaged, the effective area of ​​the positive antenna vibrator 51 will be reduced, thereby weakening the signal strength. At this time, if the signal strength continues to weaken, the alarm module 70 will be further triggered, and the smoke release warning unit 72 of the alarm module 70 will release smoke to simulate the spontaneous combustion of the battery when it is violently disassembled, so that the thief believes that the battery has been damaged due to the spontaneous combustion caused by violent disassembly and has no theft value, thereby terminating the theft. In addition, during the smoke release warning process, the voice alarm unit 71 can also broadcast the corresponding prompt tone to further strengthen the thief's psychological feeling of giving up theft and make him leave the battery pack faster. Through the double confirmation operation of warning and alarm, the frequency of false alarms caused by the position drift of the positioning signal can be greatly reduced, reducing the user's risk confirmation trouble and psychological pressure, and greatly improving the user experience.

[0055] As for the release of the alarm state, the user mobile terminal 600 that is connected to the BMS control mainboard 40 can be used to authorize the release of the control to facilitate the user's maintenance and other operations. An APP / applet can also be provided on the user mobile terminal 40 to quickly view the battery SOC remaining power, cruising range and other information, and overcharge and over-discharge alarms.

[0056] Among them, the smoke generation method of the smoke release warning unit 72 can be generated by chemical reaction or by heating a special atomizer. For the former, the specific trigger structure can be opened by the partition of two adjacent isolation chambers through a motor drive structure to allow the two chemical solutions to mix and generate smoke, or it can be achieved through other structures with similar principles. This is easy for technical personnel with this skill to think of, and this solution will not be elaborated here; for the latter, a small electronic smoke generator can be directly purchased on the market and used directly, and a more suitable one among many products can be selected, and this solution will not be elaborated here.

[0057] In this embodiment, the location information includes the regular location information corresponding to the unchanged position of the battery pack and the illegal location information corresponding to the illegal movement of the battery pack. When the user mobile terminal 600 receives the illegal location information, it can be known that the battery pack has been illegally moved. At this time, the traditional emergency measure is only for the user to go to the scene to confirm the situation of the battery pack. However, the user experience of this method is poor. When the positioning signal drifts, it may also trigger a false alarm. At this time, if the user is still reminded to go to the scene to confirm but no theft is found, the user experience will be greatly reduced, bringing unnecessary trouble to the user.

[0058] The alarm information includes a warning signal and an alarm signal; the steps for the wireless positioning module 50 and the signal strength feedback module 60 to trigger the alarm module 70 specifically include:

[0059] When the illegal location information is detected, the wireless positioning module 50 triggers the alarm module 70 to generate a warning signal and send it to the user mobile terminal 600 for warning, giving the user the first reminder;

[0060] When it is further detected that the signal strength is less than the set threshold on the basis of the first reminder, the signal strength feedback module 60 triggers the alarm module 70 to give a voice warning and a smoke release warning, and generates an alarm signal to send to the user mobile terminal 600 for alarm, to give the user the second reminder;

[0061] That is to say, the warning information is used to remind the user that there is a risk of theft of the battery pack at the current time. Due to the existence of the situation of position signal drift, the first reminder at this time still requires further processes to determine. By whether the next alarm signal appears, it can be finally determined whether there is a real theft situation, and then the situation of position drift can be excluded. That is, when the protective shell 10 is damaged, the antenna positive oscillator 51 of the wireless positioning module 50 is also damaged, resulting in a decrease in signal strength, and then the existence of the damage behavior can be known.

[0062] In order to avoid false triggering of the alarm caused by signal fluctuations, the degree of signal weakening can be continuously and repeatedly detected within a certain period of time. If the signal strength continues to weaken, it can be determined that a theft behavior has occurred. If it is only a short-term signal strength fluctuation, there is no need to alarm. The length of the corresponding detection time can be set according to the actual situation. Generally, the signal strength fluctuation is less than one second at the shortest and about one to two seconds at the longest. During this period, the theft actions of illegal thieves cannot be completed. Therefore, based on this logic, the signal strength fluctuation can be excluded by setting a cyclic detection time period, which can further improve the accuracy of the alarm.

[0063] In this embodiment, the portable battery pack BMS monitoring system of this embodiment further includes a U-shaped handle 80. The two arms 81 of the U-shaped handle 80 are respectively longitudinally rotatably connected to the protective housing 10 through two rotating components 90 to facilitate the daily handling and movement by users. Further, the rotating component 90 includes two rotating shafts 91 respectively vertically connected to the two arms 81 of the U-shaped handle 80, and a rotating seat 92 for the rotating shaft 91 to rotate about a fixed axis. The rotating seat 92 is specifically elongated and its two ends are respectively fixed to the bottom surface of the protective housing 10 by two first bolts 20 at one end of the protective housing 10. And in the middle of the lower surface of the rotating seat 92, an upwardly facing fitting groove 920 is provided corresponding to the rotating shaft 91. After assembly, the inner wall of the fitting groove 920 is in contact with the upper side wall of the rotating shaft 91 and restricts the rotating shaft 91 downward on the bottom surface of the protective housing 10.

[0064] In order to prevent the axial movement of the rotating shaft 91, an annular groove 910 adapted to the rotating seat 92 is coaxially provided on the circumferential side wall of the rotating shaft 91. After assembly, the rotating seat 92 is stuck in the annular groove 910, and thus the rotating shaft 91 can be positioned in the axial left-right direction, so that the rotation can stably perform a fixed-axis rotation motion in place.

[0065] Further, a magnetic strip 100 perpendicular to the plane where the two arms 81 of the U-shaped handle 80 are located is radially embedded in the rotating shaft 91. The two ends of the magnetic strip 100 are flush with the circumferential side wall of the rotating shaft 91. And on the bottom surface of the protective housing 10 and below the magnetic strip 100, a magnetic attraction plate 110 and a receiving groove 120 adapted to the magnetic attraction plate 110 are provided. Through the adsorption cooperation between the magnetic attraction plate 110 and the magnetic strip 100, a damping force can be provided for the rotation of the rotating shaft 91, avoiding the upper and lower shaking of the handle in the non-use state and the collision and wear with the protective housing 10.

[0066] Specifically, the depth of the receiving groove 120 is greater than the thickness of the magnetic attraction plate 110, and the magnetic attraction plate 110 is specifically rectangular. When assembled in place, that is, in the stationary state without moving the battery pack, at this time the battery pack is generally stationary in the battery box of the electric vehicle. In this state, the lower part of the rotating shaft 91 is flush with the upper end opening of the receiving groove 120 and the magnetic strip 100 is in a vertical state and attracted to the magnetic attraction plate 110 to ensure that the magnetic attraction plate 110 is still located in the receiving groove 120 when it is attracted upward and moved in place, avoiding the magnetic attraction plate 110 moving out of the receiving groove 120 due to vibration.

[0067] Further, in order to limit the positions of the two ends of the magnetic attraction plate 110 when it moves upward in place, on the bottom surface of the rotating seat 92, raised portions 921 extending downward are provided on both the left and right sides of the fitting groove 920. The lower end surface of the raised portion 921 is a horizontal plane and is flush with the bottom surface of the protective housing 10. After assembly, the two raised portions 921 are respectively located directly above the two ends of the magnetic attraction plate 110.

[0068] In this embodiment, both the magnetic attraction plate 110 and the rotating base 92 are made of iron sheets to ensure the tensile strength of the rotating base 92, while the rotating shaft 91 and the U-shaped handle are integrally connected to ensure the structural strength.

[0069] Furthermore, the portable battery pack BMS monitoring system of this embodiment further includes a closing trigger module 130 for triggering the alarm module 70. The closing trigger module 130 can be specifically integrated on the BMS control main board 40. Two trigger terminals 131 of the closing trigger module 130 are respectively extended and arranged on the bottom surface of the receiving groove 120. In the initial state, the magnetic attraction plate 110 is separated from the two trigger terminals 131 and attracted to the magnetic strip 100. In the trigger state, the magnetic strip 100 rotates and is separated from the magnetic attraction plate 110, and the magnetic attraction plate 110 falls and resets to the bottom surface of the receiving groove 120 due to the loss of the upward suction force, thereby conducting the two trigger terminals 131. As a result, the closing trigger module 130 sends a trigger signal to the alarm module 70. By separating and conducting the magnetic attraction plate 110 and the trigger terminals 131, the trigger alarm action can be bound to the action of the illegal thief repeatedly rotating the handle during the theft process due to the need for violent disassembly. When the alarm module 70 detects that the closing trigger module 130 has been repeatedly triggered multiple times, it can determine that the theft behavior has occurred and is in progress, realizing the auxiliary confirmation of the existence of theft from a more comprehensive aspect to improve the recognition accuracy of the system. Among them, the trigger times threshold of the closing trigger module 130 can be selected according to the actual situation.

[0070] Furthermore, a plurality of magnetic field detection elements 140 are arranged on the rotating base 92 along the circumferential direction of the rotating shaft 91. Specifically, three are set, and two of them are horizontally opposite to each other on the left and right, and the other is arranged at the top of the rotating base 92 and directly above the rotating shaft 91. The magnetic field detection element 140 is used to trigger the alarm module 70 to generate an alarm signal and send it to the user mobile terminal 600 for alarm according to the number of times it is triggered. By presetting the detection times threshold for the magnetic field detection element 140 to send an alarm to the alarm module 70, the occurrence of false trigger alarms caused by the failure of the magnetic attraction plate 110 to be attracted to the magnetic strip 100 can be effectively avoided. Generally, the magnetic field detection element 140 selects a Hall sensor with a small volume and high precision.

[0071] In this embodiment, the rotating base 92 is detachably arranged on the bottom surface of the protective housing 10 through the first bolt 20, and a pressing seat 150 for pressing the rotating base 92 downward is arranged on the inner top surface of the protective housing 10 to further stabilize the rotating shaft 91; further, a concave cavity 151 is arranged on the lower end surface of the pressing seat 150, and the smoke release warning unit 72 is arranged in the concave cavity 151 to make full use of the internal space of the protective housing 10, making the structure more compact. At the same time, it is also convenient for the smoke released by the smoke release warning unit 72 to be quickly released through the gap between the rotating shaft 91 and the protective housing 10, strengthening the authenticity of the battery spontaneous combustion and smoking.

[0072] In this embodiment, the protective housing 10 includes a bottom plate 101 and a protective cover 102 covering the bottom plate 101; the bottom plate 101 is rectangular and fixed on the top surface of the iron box housing 500 of the battery pack through four first bolts 20, and the protective cover 102 is connected and fixed to the bottom plate 101 through four second bolts 160 screwed upward from the lower surface of the bottom plate 101; wherein, the BMS control main board 40 is arranged on the bottom plate 101, and the rotating base 92 is fixed on the bottom plate 101 through the first bolt 20; and an annular cofferdam 1021 is arranged on the inner top surface of the protective cover 102 around the BMS control main board 40. When assembled in place, the lower end of the annular cofferdam 1021 is in sealing fit with the upper surface of the bottom plate 101; specifically, the rotating shaft 91, the smoke release warning unit 72, the first bolt 20 and the second bolt 160 are all located outside the annular cofferdam 1021, and the antenna positive oscillator is located inside the annular cofferdam. Through the cooperation of the annular cofferdam 1021 and the bottom plate 101, the sealing of the BMS control main board 40 can be realized to achieve the purpose of waterproofing, and at the same time, smoke is also prevented from entering the inside of the BMS control main board 40.

[0073] Further, a release port 1511 for releasing smoke is arranged on a side wall of the concave cavity 151 facing away from the annular cofferdam 1021. When the smoke release warning unit 72 is triggered, the smoke is released to the external environment through the release port 1511 and the gap 170 between the rotating shaft 91 and the protective cover 102.

[0074] The implementation steps of the monitoring method of the portable battery pack BMS monitoring system in this embodiment are as follows:

[0075] Step 1: Refresh the current position of the battery pack through the wireless positioning module 50 within the first preset time, and send the refreshed position information to the user mobile terminal 600. Among them, the position information includes regular position information and illegal position information, so that the user can initially judge the situation of the battery pack according to the illegal position information and facilitate the preparation of emergency measures;

[0076] Step 2: Give a warning to the user according to the illegal position information to remind the user that there may be a theft risk for the current battery pack;

[0077] Step 3: According to Step 2, the signal strength feedback module 60 detects the real-time signal strength of the wireless positioning module 50. If the real-time signal strength is less than the first preset signal strength, the voice alarm unit 71 of the alarm module 70 is triggered to give a voice alarm warning, thereby eliminating the situation such as positioning position drift in Step 2.

[0078] Step 4: The real-time signal strength is cyclically detected within the second preset time. If the real-time signal strength is less than the second preset signal strength, the smoke release warning unit 72 of the alarm module 70 is triggered to give a smoke release warning. Among them, the value of the second preset signal strength is less than the value of the first preset signal strength, so as to achieve more accurate identification of theft events and simulate the final situation of battery spontaneous combustion, play a better anti-theft warning role, and can immediately stop the continuous occurrence of theft behavior.

[0079] It should be understood that for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims

1. A portable battery pack BMS monitoring system, characterized in that: include: The protective shell is fixedly attached to the top surface of the battery pack iron box shell, and the bottom of the protective shell is provided with a power supply plug adapted to the interface of the battery pack; A BMS control mainboard is disposed in the protective housing and connected to the battery pack through the power supply plug; A wireless positioning module is integrated on the BMS control mainboard and is used to periodically refresh the location information of the battery pack to the user's mobile terminal; the antenna positive pole vibrator of the wireless positioning module is provided with multiple and evenly arranged on the inner top surface of the protective shell, and the antenna negative pole vibrator is the iron box shell of the battery pack; A signal strength feedback module is integrated on the BMS control mainboard and synchronously detects the signal strength of the wireless positioning module according to the refresh time of the location information; An alarm module is integrated on the BMS control mainboard and is triggered by the wireless positioning module and the signal strength feedback module to generate an alarm message and send it to the user's mobile terminal; Wherein, the alarm module includes a voice alarm unit and a smoke release warning unit; The position information includes regular position information corresponding to the unchanged position of the battery pack and illegal position information corresponding to the illegal movement of the battery pack; The alarm information includes early warning signals and alarm signals; The wireless positioning module and the signal strength feedback module trigger the alarm module specifically including: When the illegal location information is detected, the wireless positioning module triggers the alarm module to generate the warning signal and send it to the user's mobile terminal for warning; When it is detected that the signal strength is less than a set threshold, the signal strength feedback module triggers the alarm module to issue a voice warning and a smoke release warning, and generates an alarm signal to send to the user's mobile terminal for alarm; The monitoring method of the portable battery pack BMS monitoring system comprises the following steps: Step 1: Refresh the current position of the battery pack within a first preset time by the wireless positioning module, and send the refreshed position information to the user mobile terminal, wherein the position information includes regular position information and illegal position information; Step 2: Warning the user based on the illegal location information; Step 3: According to step 2, the real-time signal strength of the wireless positioning module is detected by the signal strength feedback module. If the real-time signal strength is less than the first preset signal strength, the voice alarm unit of the alarm module is triggered to perform a voice alarm warning; Step 4: cyclically detecting the real-time signal strength within a second preset time, if the real-time signal strength is less than the second preset signal strength, triggering the smoke release warning unit of the alarm module to issue a smoke release warning, wherein the value of the second preset signal strength is less than the value of the first preset signal strength.

2. The portable battery pack BMS monitoring system according to claim 1, characterized in that: The portable battery pack BMS monitoring system also includes a U-shaped handle, and two arms of the U-shaped handle are longitudinally rotatably connected to the protective shell through two rotating components.

3. The portable battery pack BMS monitoring system according to claim 2, characterized in that: The rotating assembly includes a rotating shaft vertically connected to the support arms of the U-shaped handle, and a rotating seat for the rotating shaft to rotate around the fixed axis; a magnetic strip perpendicular to the plane where the two arms of the U-shaped handle are located is radially embedded in the rotating shaft, and a magnetic plate and a receiving groove adapted to the magnetic plate are provided on the bottom surface of the protective shell below the magnetic strip, and the depth of the receiving groove is greater than the thickness of the magnetic plate; when assembled in place, the lower part of the rotating shaft is flush with the upper end opening of the receiving groove, and the magnetic strip is in a vertical state and is attracted to the magnetic plate.

4. The portable battery pack BMS monitoring system according to claim 3, characterized in that: The magnetic plate is an iron sheet; the portable battery pack BMS monitoring system also includes a closed trigger module that triggers the alarm module, and the two trigger terminals of the closed trigger module are respectively arranged on the bottom surface of the accommodating groove. In the initial state, the magnetic plate is separated from the two trigger terminals and is attracted to the magnetic strip. In the triggered state, the magnetic strip rotates and is separated from the magnetic plate, and the magnetic plate conducts the two trigger terminals.

5. The portable battery pack BMS monitoring system according to claim 4, characterized in that: A plurality of magnetic field detection elements are provided on the rotating seat along the circumferential direction of the rotating shaft. The magnetic field detection elements are used to trigger the alarm module to generate an alarm signal and send it to the user's mobile terminal for alarm according to the number of times they are triggered.

6. The portable battery pack BMS monitoring system according to claim 5, characterized in that: The rotating seat is detachably arranged on the bottom surface of the protective shell, and a pressing seat is arranged on the inner top surface of the protective shell, pressing downward against the rotating seat. A concave cavity is arranged on the lower end surface of the pressing seat, and the smoke release warning unit is arranged in the concave cavity.

7. The portable battery pack BMS monitoring system according to claim 6, characterized in that: The protective shell includes a bottom plate and a protective cover arranged on the bottom plate; the BMS control mainboard is arranged on the bottom plate, and an annular cofferdam is arranged on the inner top surface of the protective cover around the BMS control mainboard. When assembled in place, the lower end of the annular cofferdam is sealed and fitted with the upper surface of the bottom plate, and the rotating shaft is located on the outside of the annular cofferdam.

8. The portable battery pack BMS monitoring system according to claim 7, characterized in that: A release port for releasing smoke is arranged on a side wall of the concave cavity away from the annular cofferdam.

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