A visual detection device for electrolyte leakage in lithium-ion battery pack cells

Abstract

This utility model discloses a visual lithium-ion battery pack electrolyte leakage detection device, relating to the field of electrolyte leakage detection and early warning technology. It includes a lithium battery block and a protective shell for storing and discharging multiple lithium battery blocks. One corner of the protective shell has a notch, and a visualization window is fixedly installed in the notch. Floating blocks distributed at the bottom of the notch are placed within the visualization window, and a vertical rod is fixedly installed at the center of the top of each floating block. It also includes detection chambers distributed at predetermined positions within the visualization window. Each detection chamber includes a central perforation, within which a spring sleeve is fixedly installed. A spring sleeve, interlocking with the spring sleeve, is fixedly installed on the outer wall of the vertical rod. This utility model achieves early warning of electrolyte leakage in lithium-ion battery cells through a buzzer and a visualization window.

Description

Technical Field

[0001] This utility model relates to the field of electrolyte leakage detection and early warning technology, specifically a visual lithium-ion battery pack cell electrolyte leakage detection device. Background Technology

[0002] Electrolyte leakage in lithium-ion battery cells is an extremely serious malfunction that can directly lead to the complete paralysis of battery performance. The electrolyte, as the ion conductor inside the battery, is the only channel through which lithium ions travel between the positive and negative electrodes, functioning much like the circulatory system. Once a leak occurs, the battery's internal resistance increases dramatically, cutting off or severely blocking the ion transport path. This directly manifests as a precipitous drop in the battery's effective capacity and output power. You'll find the battery becomes unchargeable, the charge indicator instantly drops to zero, or it quickly loses power after only slight use, completely losing its basic energy storage and power supply functions, ultimately becoming a "dead battery."

[0003] More critically, electrolyte leakage triggers a chain reaction of chemical reactions, pushing the battery to the brink of thermal runaway (combustion or explosion). Leakage first disrupts the stability of the protective solid electrolyte interphase (SEI) film on the negative electrode surface. To repair this film, the battery continuously consumes its already limited electrolyte and active lithium, inducing uneven lithium ion deposition to form sharp lithium dendrites. These dendrites easily pierce the separator, causing a direct internal short circuit between the positive and negative electrodes, instantly generating a large amount of heat. Simultaneously, various violent side reactions produce large amounts of flammable gases (such as carbon monoxide and methane), causing the battery casing to bulge and deform, further increasing the risk of internal short circuits. These factors combined cause the battery's internal temperature to rise exponentially, ultimately igniting the remaining, already highly flammable organic electrolyte, leading to violent combustion or even an explosion.

[0004] Therefore, it is necessary to detect and provide early warning of electrolyte leakage in lithium-ion battery cells in order to avoid major accidents. Utility Model Content

[0005] The purpose of this invention is to provide a visual detection device for electrolyte leakage in lithium-ion battery pack cells, in order to overcome the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a visual lithium-ion battery pack internal cell electrolyte leakage detection device, including lithium battery blocks, and a protective shell for storing and discharging multiple lithium battery blocks, wherein one corner of the protective shell is notched, and a visualization window is fixedly installed in the notched corner;

[0007] The visualization window contains floating blocks distributed at the bottom of the notch, and a vertical rod is fixedly installed at the center of the top of the floating blocks;

[0008] It also includes a detection chamber located at a predetermined position in the visualization window. The detection chamber includes a central perforation, in which a spring sleeve is fixedly disposed. The outer wall of the vertical rod is fixedly installed with a spring sleeve that is interlocked with the spring sleeve.

[0009] Preferably, a buzzer and a button battery compartment are fixedly installed inside the detection chamber, and the buzzer, the button battery compartment, the spring core sleeve, and the spring sleeve form a series circuit.

[0010] Preferably, a sealing member is inserted into the top of the visualization window, and a connecting rod is fixedly connected between the sealing member and the detection chamber.

[0011] Preferably, both the floating block and the vertical rod are made of high-density sponge.

[0012] Preferably, the detection chamber has a hatch facing the floating block, and a cover is fixedly inserted into the hatch.

[0013] Preferably, a grid bracket is fixedly installed inside the protective shell, and multiple lithium battery blocks are arranged on the grid bracket.

[0014] Preferably, the mesh bracket maintains a predetermined distance from the bottom inner side of the protective shell, and a flow guide is placed within this distance, the flow guide including inclined liquid outlet channels;

[0015] The protective shell has a vertical channel that communicates with the notch, and the vertical channel is connected to the lower part of the liquid outlet channel.

[0016] Preferably, a cyclohexylbenzene block is provided inside the vertical channel.

[0017] Preferably, the flow guide includes a plurality of V-shaped liquid inlets corresponding to the lithium battery block, and the plurality of V-shaped liquid inlets are connected in parallel to the liquid outlet channel.

[0018] In the above technical solution, the present invention provides a visual lithium-ion battery pack internal cell electrolyte leakage detection device, which has the following beneficial effects: after the electrolyte of the lithium battery pack leaks, it is guided into the missing slot, thereby pushing the floating block upward, and then driving the vertical rod to insert into the central through hole, so that the spring sleeve is embedded in the spring core sleeve and makes contact, thereby connecting the entire circuit, thereby driving the buzzer to give an early warning, realizing the early warning of electrolyte leakage of lithium-ion battery cells, and the changes of the floating block can be directly observed by the naked eye through the visualization window. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0021] Figure 2 This is a side sectional view of the structure provided for an embodiment of the present utility model;

[0022] Figure 3 Provided for the embodiments of this utility model Figure 2 A partially enlarged structural diagram;

[0023] Figure 4 A schematic diagram of the visualization window, floating block, and detection chamber provided for an embodiment of this utility model;

[0024] Figure 5 A cross-sectional structural diagram of the detection chamber provided in an embodiment of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Lithium battery block; 2. Protective shell; 21. Notch; 22. Grid bracket; 23. Vertical channel; 3. Visual window; 4. Floating block; 41. Vertical rod; 42. Spring sleeve; 5. Detection chamber; 51. Center perforation; 511. Spring sleeve; 52. Button battery compartment; 53. Buzzer; 6. Sealing component; 61. Connecting rod; 7. Cover; 8. Flow guide; 81. Liquid outlet channel; 82. V-shaped liquid receiving tank; 9. Cyclohexene block. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] Please see Figure 1-5 This utility model provides a technical solution: a visual lithium-ion battery pack internal cell electrolyte leakage detection device, used to detect whether electrolyte leakage has occurred in lithium battery block 1. Its detailed structure includes the following embodiments:

[0029] Example 1

[0030] Combination Figure 1 and Figure 2As shown, multiple lithium battery blocks 1 are arranged inside a protective housing 2. A notch 21 is formed at one corner of the protective housing 2, and a visualization window 3, sealed and fixed with adhesive, is provided on the notch 21. Further, floating blocks 4 are placed inside the visualization window 3, distributed at the bottom of the notch 21, and a vertical rod 41 is fixedly installed at the center of the top of the floating blocks 4. Detection chambers 5 are also provided in the visualization window 3, distributed at predetermined positions. A central perforation 51 is provided in the detection chamber 5, and a spring core sleeve 511 is fixedly installed inside the central perforation 51. A spring sleeve 42, which is interlocked with the spring core sleeve 511, is fixedly installed on the outer wall of the vertical rod 41.

[0031] Furthermore, a buzzer 53 and a button battery compartment 52 are fixedly installed inside the detection chamber 5. The buzzer 53, the button battery compartment 52, the reed core sleeve 511 and the reed sleeve 42 form a series circuit.

[0032] In the above technology, after the electrolyte of the lithium battery cell 1 leaks, it is guided into the notch 21, thereby pushing the floating block 4 upward. This causes the vertical rod 41 to insert into the central through hole 51, making the spring sleeve 42 embedded in the spring core sleeve 511, thus connecting the entire circuit and triggering the buzzer 53 to issue an early warning. This achieves early warning of electrolyte leakage in the lithium battery cell, and the changes in the floating block 4 can be directly observed with the naked eye through the visualization window 3.

[0033] Example 2

[0034] Based on Embodiment 1, this embodiment aims to provide a method in which the detection chamber 5 is distributed at a predetermined position. A sealing plug 6, sealed with adhesive, is inserted into the top of the visualization window 3, and a connecting rod 61 is fixedly connected between the sealing plug 6 and the detection chamber 5. The predetermined height of the detection chamber 5 can be fixed by using the connecting rod 61.

[0035] Furthermore, both the floating block 4 and the vertical rod 41 are made of high-density sponge. A silicone pad is fixedly installed on the side of the floating block 4 facing the notch 21, thereby realizing the piston movement. The detection chamber 5 has a hatch on the side facing the floating block 4, and a cover 7 is fixedly inserted into the hatch. When the cover 7 is removed, the button battery in the button battery compartment 52 can be replaced.

[0036] Example 3

[0037] Based on Embodiment 1, this embodiment aims to provide electrolyte guidance, with an integrally formed mesh bracket 22 inside the protective housing 2, and multiple lithium battery blocks 1 arranged on the mesh bracket 22. The grid bracket 22 maintains a predetermined distance from the bottom inner side of the protective shell 2, and a guide 8 is placed within this distance. The guide 8 has inclined liquid outlet channels 81 and multiple V-shaped liquid inlet grooves 82 corresponding to the lithium battery block 1. The multiple V-shaped liquid inlet grooves 82 are connected in parallel to the liquid outlet channels 81. The liquid outlet channels 81 are used to guide the electrolyte leaking from the lithium battery block 1 from the V-shaped liquid inlet grooves 82 to the liquid outlet channels 81, and finally enter the vertical channel 23 inside the protective shell 2 that is connected to the notch 21. At this time, the electrolyte reacts chemically with the cyclohexene block 9 placed in the vertical channel 23 to produce hydrogen gas. The hydrogen gas passes through the vertical channel 23, thereby pushing the floating block 4 upward, which in turn drives the vertical rod 41 to insert into the central through hole 51, so that the spring sleeve 42 is embedded in the spring core sleeve 511 and contacts, thereby connecting the entire circuit and driving the buzzer 53 to give an early warning. This enables early warning of electrolyte leakage in ion battery cells, and the changes in the floating block 4 can be directly observed with the naked eye through the visualization window 3.

[0038] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A device for visualizing the detection of electrolyte leakage from cells within a lithium-ion battery pack, comprising a lithium battery block (1), characterized in that, It also includes a protective housing (2) for storing and discharging multiple lithium battery blocks (1), one corner of the protective housing (2) being a notch (21), and a visualization window (3) being fixedly installed in the notch (21); The visualization window (3) contains floating blocks (4) distributed at the bottom of the notch (21), and a vertical rod (41) is fixedly installed at the center of the top of the floating block (4). It also includes a detection chamber (5) located at a predetermined position of the visualization window (3). The detection chamber (5) includes a central perforation (51). A spring core sleeve (511) is fixedly installed in the central perforation (51). A spring sleeve (42) is fixedly installed on the outer wall of the vertical rod (41) and is in an interlocking manner with the spring core sleeve (511).

2. The device for detecting leakage of electrolyte of a cell in a lithium-ion battery pack according to claim 1, characterized in that, The detection chamber (5) is fixedly installed with a buzzer (53) and a button battery compartment (52). The buzzer (53), the button battery compartment (52), the spring core sleeve (511) and the spring sleeve (42) form a series circuit.

3. The device for visualizing the leakage of the electrolyte of the cells in the lithium-ion battery pack according to claim 1, characterized in that, A sealing element (6) is inserted into the top of the visualization window (3), and a connecting rod (61) is fixedly connected between the sealing element (6) and the detection chamber (5).

4. The device for detecting leakage of electrolyte of a cell in a lithium-ion battery pack according to claim 1, characterized in that, Both the floating block (4) and the vertical rod (41) are high-density sponge components.

5. The device for visualizing the leakage of the electrolyte of the cells in the lithium-ion battery pack according to claim 1, characterized in that, The detection chamber (5) has a hatch facing the floating block (4), and a cover (7) is fixedly inserted into the hatch.

6. The visual lithium-ion battery pack cell electrolyte leakage detection device according to claim 1, characterized in that, A grid bracket (22) is fixedly installed inside the protective shell (2), and multiple lithium battery blocks (1) are arranged on the grid bracket (22).

7. The device for visualizing the leakage of the electrolyte of the electric cells inside the lithium-ion battery pack according to claim 6, characterized in that, The mesh bracket (22) maintains a predetermined distance from the bottom of the inner side of the protective shell (2), and a flow guide (8) is placed within this distance. The flow guide (8) includes inclined liquid outlet channels (81). The protective shell (2) has a vertical channel (23) that communicates with the notch (21), and the vertical channel (23) is connected to the lower part of the liquid outlet channel (81).

8. The device for detecting leakage of electrolyte from a cell in a lithium-ion battery pack according to claim 7, wherein Cyclohexene blocks (9) are placed inside the vertical channel (23).

9. The device for detecting leakage of electrolyte from a cell in a lithium-ion battery pack according to claim 7, wherein The flow guide (8) includes a plurality of V-shaped liquid inlet channels (82) corresponding to the lithium battery block (1), and the plurality of V-shaped liquid inlet channels (82) are connected in parallel to the liquid outlet channel (81).

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