Battery monitoring device and high voltage detection method

Abstract

The invention provides a battery monitoring device and a high-voltage detection method, and relates to the technical field of battery monitoring, and the device comprises a monitoring module which is used for monitoring the state data of a battery cell; the trigger module is connected in series with the lead of the monitoring module, the monitoring module is powered off when the trigger module is not triggered, and the monitoring module is powered on when the trigger module is triggered; and the mounting component is used for mounting the monitoring module and the triggering module. The monitoring module and the trigger module are installed on the battery through the installation part, the monitoring module is protected through the trigger module, the monitoring module is disconnected before high-voltage detection to avoid high-voltage damage, and the monitoring module is connected after high-voltage detection to monitor the change of air pressure in the battery in real time. Therefore, the monitoring module can be effectively protected from failure caused by high-voltage detection, and the rate of finished products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery monitoring, and in particular to a battery monitoring device and a high-voltage detection method. Background Art

[0002] When sealed batteries, such as lithium-ion batteries, are overcharged, overheated, or experience an internal short circuit, the electrolyte may decompose to produce large amounts of gases (such as CO2, H2, CH4, etc.), causing a sharp increase in internal pressure. If the excessive gas pressure cannot be released, the battery may swell, rupture, or even cause combustion or explosion.

[0003] Therefore, existing technologies often incorporate a monitoring module built into the battery package, allowing it to contact the gas inside the battery or its sealed environment and monitor changes in internal pressure in real time. For example, when the battery overheats or the electrolyte decomposes and produces gas, the pressure rises sharply, triggering the BMS to shut off the battery or trigger a pressure relief valve. When the battery seal fails, causing the pressure to drop, this can lead to electrolyte depletion, prompting the BMS to issue an alarm and initiate maintenance. Examples of this type of existing technology include Chinese patent CN108871657A, published on November 23, 2018, and Chinese patent CN118514523A, published on August 20, 2024.

[0004] However, the battery cell manufacturing process will undergo high-voltage testing, which may cause irreversible damage to the monitoring module, resulting in reduced yield or failure of the monitoring module. Summary of the Invention

[0005] The first object of the present invention is to provide a battery monitoring device capable of protecting a monitoring module from monitoring changes in the internal gas pressure of a battery;

[0006] A second object of the present invention is to provide a high-voltage detection method for a battery monitoring device, which can prevent the monitoring module from being damaged by high-voltage detection means;

[0007] The present invention provides a battery monitoring device, comprising: a monitoring module, the monitoring module being used to monitor status data of a battery cell; a trigger module, the trigger module being connected in series with a wire of the monitoring module, the monitoring module being powered off when the trigger module is not triggered, and being powered on when the trigger module is triggered; and an installation component, the installation component being used to install the monitoring module and the trigger module.

[0008] Furthermore, the monitoring module includes an air pressure sensor, which is connected to the pole of the battery cell through a wire for power supply.

[0009] Furthermore, the monitoring module further includes a PCB board, and the air pressure sensor is integrated on the PCB board.

[0010] Furthermore, the installation component includes a cover plate and a first snap-fit cover; a limiting column is provided on the cover plate, and a buckle is connected to the limiting column; a slot is provided at the edge of the first snap-fit cover; the monitoring module is fixed between the limiting column, the cover plate and the first snap-fit cover, and the buckle of the limiting column is snapped into the slot of the first snap-fit cover.

[0011] Furthermore, the trigger module includes a switch, a pressing unit and a pressing channel. The switch is connected in series with the wire of the monitoring module. The pressing channel is arranged above the switch. The pressing unit can move in the pressing channel to control the on and off of the switch.

[0012] Furthermore, the pressing unit includes sealing rubber particles, and the pressing channel and the sealing rubber particles are interference fit.

[0013] Furthermore, the installation component includes a cover plate and a second snap-fit cover; a limiting column is provided on the cover plate, and a buckle is connected to the limiting column; a slot is provided at the edge of the second snap-fit cover; the trigger module is fixed between the limiting column, the cover plate and the second snap-fit cover, and the buckle of the limiting column is engaged in the slot of the second snap-fit cover.

[0014] Furthermore, the mounting component includes an insulating patch, and the insulating patch is attached to and covers the cover plate and the wire.

[0015] The present invention also provides a high-voltage detection method for a battery monitoring device, comprising the following steps: S1, before performing high-voltage detection on a battery cell, controlling a trigger module to power off a monitoring module; S2, after performing high-voltage detection on a battery cell, controlling a trigger module to power on a monitoring module.

[0016] Furthermore, the trigger module includes a switch, a sealing rubber particle and a pressing channel. The switch is connected in series with the wires of the monitoring module, and the pressing channel is arranged above the switch. Before the high-voltage test on the battery cell is performed, the sealing rubber particle is not inserted into the pressing channel and the switch is not turned on, so that the monitoring module is powered off. After the high-voltage test on the battery cell is performed, the sealing rubber particle is inserted into the pressing channel, and the switch is pressed to turn on the switch, so that the monitoring module is powered on.

[0017] The technical solution of the present invention installs a monitoring module and a trigger module on a battery through installation components, protects the monitoring module through the trigger module, disconnects the monitoring module before high-voltage detection to avoid damage by high voltage, and connects the monitoring module after high-voltage detection to monitor the changes in the internal air pressure of the battery in real time. Therefore, the present invention can effectively protect the monitoring module from failure due to high-voltage detection and improve the yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the structure from an upper perspective of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure from the bottom perspective of the present invention;

[0021] Figure 3 For the present invention Figure 2 Exploded view of;

[0022] Figure 4 It is a bottom view of the present invention;

[0023] Figure 5 For the present invention Figure 4 AA cross-sectional view;

[0024] Figure 6 For the present invention Figure 5 An enlarged view of point A and a schematic diagram of the sealing rubber pellets inserted into the pressing channel;

[0025] Description of reference numerals:

[0026] 1-Monitoring module; 11-Air pressure sensor; 12-PCB board;

[0027] 2-trigger module; 21-switch; 22-pressing unit; 221-sealing rubber particles; 23-pressing channel;

[0028] 3- wire;

[0029] 4-installation component; 41-cover; 42-first buckle cover; 43-second buckle cover; 44-limiting column; 45-buckle; 46-slot; 47-insulation patch;

[0030] 5-pole. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] Example 1

[0035] like Figures 1-6 As shown, the present invention provides a battery monitoring device, including: a monitoring module 1, the monitoring module 1 is used to monitor the status data of the battery cell; a trigger module 2, the trigger module 2 is connected in series with a wire 3 of the monitoring module 1, the monitoring module 1 is powered off when the trigger module 2 is not triggered, and the monitoring module 1 is powered on when the trigger module 2 is triggered; and an installation component 4, the installation component 4 is used to install the monitoring module 1 and the trigger module 2.

[0036] Specifically, the battery monitoring device is composed of a cover plate 41 , a monitoring module 1 , a trigger module 2 , a snap-fit cover, and an insulating patch 47 .

[0037] The monitoring module 1 can realize functions such as collecting and transmitting data inside the battery cell. The monitoring module 1 may include an air pressure sensor 11 to monitor air pressure, and may also include other functional sensors to monitor other status data, such as a temperature sensor.

[0038] Taking into account the high-voltage detection means existing in the battery cell manufacturing process, the high voltage will cause irreversible damage to the monitoring module 1. For this purpose, a trigger module 2 is developed. The trigger module 2 is connected in series to the circuit of the monitoring module 1. Before the high-voltage monitoring means detects, the entire circuit is in a disconnected state, thereby protecting the monitoring module 1 from damage.

[0039] During the processing of the cover plate 41, the module with monitoring and transmitting functions, the trigger module 2 that controls on and off, and the cover plate 41 must be integrated together. The overall assembly plan is as follows: each component is processed separately, the normal cover plate 41 is assembled, the monitoring module 1 is embedded, the snap-fit cover is installed, and the insulating patch 47 is applied. The assembled cover plate 41 can be used in battery assembly. After the battery is manufactured, the internal battery information will be continuously collected and uploaded throughout the life cycle of the single cell.

[0040] Example 2

[0041] The monitoring module 1 includes an air pressure sensor 11, which is connected to the battery cell's pole 5 via a wire 3 for power. The monitoring module 1 also includes a PCB 12, on which the air pressure sensor 11 is integrated. The mounting component 4 includes a cover 41 and a first snap-fit cover 42. The cover 41 is provided with a retaining post 44, to which a buckle 45 is attached. The first snap-fit cover 42 has a slot 46 at its edge. The monitoring module 1 is secured between the retaining post 44, the cover 41, and the first snap-fit cover 42, with the buckle 45 of the retaining post 44 snapping into the slot 46 of the first snap-fit cover 42.

[0042] Specifically, the wire 3 of the monitoring module 1 connects to the battery post 5 to draw power. A first snap-on cover 42 is designed to secure the monitoring module 1; the module 1 is sandwiched between four retaining posts 44, with stepped sides. The first snap-on cover 42 has a "J"-shaped flange structure that fits snugly onto the monitoring module 1, exposing the steps on both sides of the module for connection to the battery post 5 via the wire 3. The retaining posts 44 snap onto the first snap-on cover 42.

[0043] Example 3

[0044] The trigger module 2 includes a switch 21, a pressing unit 22, and a pressing channel 23. The switch 21 is connected in series with the wire 3 of the monitoring module 1. The pressing channel 23 is arranged above the switch 21. The pressing unit 22 can move within the pressing channel 23 to control the on and off of the switch 21. The pressing unit 22 includes a sealing rubber particle 221. The pressing channel 23 and the sealing rubber particle 221 have an interference fit. The mounting component 4 includes a cover plate 41 and a second snap-fit cover 43. The cover plate 41 is provided with a limiting post 44, to which a buckle 45 is connected. The second snap-fit cover 43 has a slot 46 at its edge. The trigger module 2 is fixed between the limiting post 44, the cover plate 41, and the second snap-fit cover 43. The buckle 45 of the limiting post 44 snaps into the slot 46 of the second snap-fit cover 43.

[0045] Specifically, the trigger module 2 is connected in series to the wire 3 of the monitoring module 1 and the battery terminal 5. A second snap-on cover 43 is designed to secure the trigger module 2. The switch 21 is a push-on structure, with a push channel 23 connected to the cover 41. The push channel 23 has a through hole located above the switch 21 (away from the second snap-on cover 43). When the push unit 22 is pressed from the push channel 23, the switch 21 is turned on. The trigger module 2 is clamped between four limiting posts 44. The second snap-on cover 43 is a square cover-like structure with multiple slots 46 on its outer edge. The snaps 45 on the limiting posts 44 snap onto the second snap-on cover 43, directly snapping the trigger module 2 inside to secure it.

[0046] Pressing unit 22 triggers module 2 via sealing rubber pellet 221. During high-voltage testing, sealing rubber pellet 221 is not yet inserted, and the entire circuit is disconnected. After the test is complete, sealing rubber pellet 221 is inserted. The physical pressure closes switch 21, completing the circuit connection and protecting monitoring module 1 from damage. Sealing rubber pellet 221 acts to both press and connect switch 21 and seal pressing channel 23. Sealing rubber pellet 221 is inserted into pressing channel 23 from the back side of switch 21 (away from second snap-fit cover 43), preventing it from falling out through interference fit.

[0047] Example 4

[0048] The mounting component 4 includes an insulating patch 47 , which is attached to and covers the cover 41 and the wire 3 .

[0049] Specifically, the insulating patch 47 adopts a contoured design, and the power supply metal sheet is insulated from the inside of the battery cell. The design of the insulating patch 47 can play an insulating role. At the same time, the contoured patch is fully covered to play a covering and beautiful role.

[0050] Example 5

[0051] The present invention also provides a high-voltage detection method for a battery monitoring device, comprising the following steps: S1, before performing a high-voltage test on a battery cell, controlling the trigger module 2 to de-energize the monitoring module 1; S2, after performing the high-voltage test on the battery cell, controlling the trigger module 2 to energize the monitoring module 1. The trigger module 2 includes a switch 21, a sealing rubber particle 221, and a pressing channel 23. The switch 21 is connected in series with the wire 3 of the monitoring module 1, and the pressing channel 23 is disposed above the switch 21. Before performing the high-voltage test on the battery cell, the sealing rubber particle 221 is not inserted into the pressing channel 23, and the switch 21 is not connected, thereby de-energizing the monitoring module 1. After performing the high-voltage test on the battery cell, the sealing rubber particle 221 is inserted into the pressing channel 23, and the switch 21 is pressed to connect the switch 21, thereby energizing the monitoring module 1.

[0052] Specifically, the trigger module 2 is triggered by the sealing rubber particles 221. When the high-voltage test is performed, the sealing rubber particles 221 have not yet been inserted and the entire circuit is in a disconnected state. After the test is completed, the sealing rubber particles 221 are inserted. Due to the physical pressing effect, the switch 21 is closed, completing the path connection; that is, the monitoring module 1 is protected from being damaged.

[0053] The working mode and principle of the present invention can be found in the high voltage detection method of Example 5, which will not be described in detail.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery monitoring device, characterized in that: include: A monitoring module, configured to monitor battery status data; A trigger module, wherein the trigger module is connected in series with a wire of the monitoring module, the monitoring module is powered off when the trigger module is not triggered, and the monitoring module is powered on when the trigger module is triggered; An installation component is used to install the monitoring module and the trigger module.

2. The battery monitoring device according to claim 1, characterized in that: The monitoring module includes an air pressure sensor, which is connected to the pole of the battery cell through a wire for power supply.

3. The battery monitoring device according to claim 2, characterized in that: The monitoring module further includes a PCB board, and the air pressure sensor is integrated on the PCB board.

4. The battery monitoring device according to claim 3, characterized in that: The mounting component includes a cover plate and a first snap-on cover; The cover plate is provided with a limiting column, and the limiting column is connected with a buckle; A card slot is provided on the edge of the first buckle cover; The monitoring module is fixed between the limiting column, the cover plate and the first buckle cover, and the buckle of the limiting column is engaged with the slot of the first buckle cover.

5. The battery monitoring device according to claim 1, characterized in that: The trigger module includes a switch, a pressing unit and a pressing channel. The switch is connected in series with the wire of the monitoring module. The pressing channel is arranged above the switch. The pressing unit can move in the pressing channel to control the on and off of the switch.

6. The battery monitoring device according to claim 5, characterized in that: The pressing unit includes sealing rubber particles, and the pressing channel and the sealing rubber particles are interference-fitted.

7. The battery monitoring device according to claim 5, characterized in that: The mounting component includes a cover plate and a second snap-on cover; The cover plate is provided with a limiting column, and the limiting column is connected with a buckle; A card slot is provided on the edge of the second buckle cover; The trigger module is fixed between the limiting column, the cover plate and the second buckle cover, and the buckle of the limiting column is engaged with the slot of the second buckle cover.

8. The battery monitoring device according to claim 1, characterized in that: The mounting component includes an insulating patch, and the insulating patch is attached to and covers the cover plate and the wire.

9. A high voltage detection method for a battery monitoring device according to claim 1, characterized in that: The steps include: S1, before performing high-voltage detection on the battery cell, control the trigger module to power off the monitoring module; S2, after performing high voltage detection on the battery cell, controls the trigger module to power on the monitoring module.

10. The high voltage detection method according to claim 9, characterized in that: The trigger module includes a switch, a sealing rubber particle and a pressing channel. The switch is connected in series with the wires of the monitoring module, and the pressing channel is arranged above the switch. Before performing high-voltage testing on the battery cell, the sealing rubber particles are not inserted into the pressing channel and the switch is not turned on, so the monitoring module is powered off; After the battery cell is subjected to high-voltage testing, the sealing rubber particles are inserted into the pressing channel, and the switch is pressed to turn on the switch, thereby energizing the monitoring module.

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