Rigid airbag device for square battery

Abstract

The utility model discloses a square battery rigid air bag device which comprises a first column, a cross beam and a second column, and the upper end of the first column is connected with the upper end of the second column through the cross beam to form a door-shaped structure; a gas accommodating cavity and a gas inlet are formed in the cross beam; the gas inlet is in sealed butt joint with a liquid injection port of the square battery and is communicated with the gas accommodating cavity; a first through hole and a second through hole are formed in the cross beam; a positive probe and a negative probe of a battery formation device respectively penetrate through the first through hole and the second through hole to be connected with a positive pole and a negative pole of the square battery; an exhaust valve is arranged at any one of the left end and the right end of the cross beam and used for exhausting gas in the gas containing cavity. The rigid airbag device for the battery adopts a door-shaped structure and a positioning and locking mechanism, so that the liquid injection port of the square battery is in close contact with the air inlet on the cross beam and is always sealed, the battery is prevented from being influenced by the humidity of a production environment in a production process after liquid injection, the performance of the battery is improved, and the production cost is reduced. And the dehumidification energy consumption cost in battery production is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a device for processes such as standing, forming and aging of square metal shell batteries after liquid injection. Background Art

[0002] Lithium batteries have been widely used in electric vehicles and energy storage due to their high energy density, long cycle life, wide temperature range, low self-discharge rate and stable operating voltage platform, and have very broad market prospects. Lithium batteries are a complex system, including components such as positive electrodes, negative electrodes, electrolytes and diaphragms, involving electrochemical reactions between positive and negative electrodes, lithium ion conduction, electron transmission, and heat generation and diffusion. Its production process is very complex and involves multiple production processes. After the battery is filled, it is usually necessary to stand, form, and age to ensure stable and reliable battery performance.

[0003] The formation process is a crucial part of the lithium-ion battery manufacturing process. In this process, a certain current is applied to activate the active materials at the positive and negative electrodes of the battery cell, so that the battery cell has the ability to charge and discharge. During the formation process, a stable solid electrolyte interface (SEI) film will form on the surface of the negative electrode. The formation and stability of this SEI film has an important impact on the capacity and cycle life of the battery cell.

[0004] Conventional formation processes usually include the following steps: first, the battery after injection is pre-sealed or temporarily sealed, and left to stand at high temperature for a period of time, and then current is applied to the battery cell to promote the formation of the SEI film; then, the charge and discharge process is carried out to further enhance the stability of the SEI film; finally, the battery is left to stand again to ensure the stability of the SEI film. However, as the energy density of the battery increases, even if the standing time before and after charging and discharging is extended, it is difficult to ensure the wettability of the electrolyte and the stability of the SEI film.

[0005] CN108306062A discloses a formation method for improving the cycle life of a soft-pack power battery, a battery formation fixture and its application, and a soft-pack power battery, and relates to the technical field of soft-pack power batteries. The formation method comprises placing the battery after liquid injection in a multi-stage vacuum standing and vacuum sealing process, and then placing the vacuum-sealed battery in a battery formation fixture for aging, pre-charging, standing, and other steps, wherein the immersion method of vacuum standing after liquid injection can shorten the electrolyte absorption rate and the liquid infiltration time; the aging process adopts pressure standing, which can make the electrolyte infiltrate more fully under a certain pressure; the pre-charging process adopts a battery formation fixture, which can make the positive and negative plates of the battery contact closely, and the SEI film formed has the same composition, and the surface thickness is uniform and stable. The invention also provides a battery formation fixture, which has a simple structure, is easy to use, and is suitable for industrial production.

[0006] CN114335740A discloses a formation method of a lithium ion battery and a lithium ion battery. In the low-temperature formation stage, there is only the first electrolyte in the battery core, so that the SEI film formed on the surface of the negative electrode of the lithium ion battery is thin and dense in the low-temperature formation stage, which is conducive to improving the storage performance of the battery core; in the normal temperature formation stage, the battery core includes the first electrolyte and the second electrolyte, so that the SEI film formed on the surface of the negative electrode of the lithium ion battery is thicker in the normal temperature formation stage, ensuring that the formed SEI film has relatively stable performance. The components of the additives included in the first electrolyte and the second electrolyte make the by-products of the formation process less, thereby reducing the volume expansion caused by the accumulation of by-products during the cycle, thereby ensuring that the formed SEI film has good characteristics and charging safety.

[0007] The currently disclosed square battery formation methods and devices have certain defects, especially the negative pressure formation device of square batteries is bulky, and the external humid air is easily invaded during the formation and exhaust process, which has a negative impact on the cycle performance of the battery; therefore, the production environment of the negative pressure formation process must be strictly dehumidified; strict dehumidification of the environment will inevitably lead to high production energy consumption costs. Therefore, it is very important to develop and design a new type of square metal shell battery formation supporting device that does not require environmental dehumidification. Utility Model Content

[0008] The utility model solves the above-mentioned technical problems to a certain extent, and discloses a square battery rigid airbag device suitable for a metal shell, comprising a first column, a crossbeam and a second column, wherein the upper end of the first column is connected to the upper end of the second column through the crossbeam, so that the first column, the crossbeam and the second column present a door-shaped structure;

[0009] A sealed gas containing cavity is provided in the crossbeam, and an air inlet with a planar sealing structure is provided on one side of the crossbeam facing the first column and the second column; the air inlet is sealed and docked with the liquid injection port of the target square battery, and the air inlet is communicated with the gas containing cavity;

[0010] A first slide groove and a second slide groove which are parallel to each other and have equal width and length are respectively arranged on the inner sides of the first column and the second column, and the width of the first slide groove and the second slide groove is equal to the thickness of the target square battery; the farthest distance between the first slide groove and the second slide groove is equal to the width of the target square battery; the lower ends of the first column and the second column are both provided with positioning locking mechanisms;

[0011] The positioning locking mechanism limits the displacement of the target square battery, so that the target square battery is positioned at the correct position between the crossbeam, the first slide groove, and the second slide groove, and the air inlet is in close contact with the liquid injection port of the target square battery and always remains sealed;

[0012] The crossbeam is provided with a first opening and a second opening through which the positive and negative formation probes of the battery can pass, the first opening and the second opening respectively correspond to the positive and negative poles of the target square battery, and the positive and negative formation probes respectively pass through the first opening and the second opening to contact the positive and negative poles of the target square battery; the first opening, the second opening and the gas containing cavity on the crossbeam are closed and not connected, so that the gas containing cavity is airtight and leak-proof;

[0013] An exhaust valve is arranged at either the left or right end of the crossbeam, and the exhaust valve is connected to the gas containing chamber. The exhaust valve opens and releases the pressure after the internal pressure of the gas containing chamber exceeds a preset pressure. The exhaust valve can also be connected to a vacuum pump to extract the gas in the gas containing chamber.

[0014] The square battery rigid airbag device adopts a door-shaped structure and a positioning and locking mechanism, so that the device can effectively fix the target square battery, and make the injection port of the target square battery closely contact with the air inlet on the crossbeam of the airbag device and always keep it sealed, so as to ensure that the battery is protected from the negative influence of the humidity of the working environment during the standing, forming, aging and other processes after injection, which not only improves the performance of the battery, but also greatly reduces the dehumidification energy consumption cost in battery production; the square battery rigid airbag device adopts a door-shaped structure and a slide groove arranged on the column, which can also facilitate the loading, fixing and removal of the target square battery.

[0015] When the user performs a formation process on a square battery, the positive and negative probes of the formation equipment can be conveniently connected to the positive and negative poles of the battery through the first opening and the second opening provided on the crossbeam, so that the battery can be directly connected to the positive and negative probes of the formation equipment without being disassembled, thereby completing the formation process of the target square battery.

[0016] An exhaust valve is provided on the gas containing chamber on the crossbeam, and a preset opening pressure is set for the exhaust valve. The exhaust valve can automatically open when the pressure in the gas containing chamber exceeds the preset pressure to release the excess pressure, thereby ensuring that the pressure inside the airbag device is always within a safe range and improving the reliability of the device. At the same time, for the formation process of the target square battery, if the process or production requires, the exhaust valve is connected to the vacuum device to discharge the gas generated in the formation process in a timely manner.

[0017] As an embodiment disclosed by the utility model, a gas storage cavity is provided in the first column, and the gas storage cavity is connected with the gas containing cavity on the cross beam and is sealed relative to the outside. The gas storage cavity is provided in the first column so that the volume of gas contained in the gas containing cavity in the cross beam of the square battery rigid airbag device is expanded, and the gas pressure in the gas containing cavity is reduced, thereby reducing the frequency of using the exhaust valve or vacuum pump and extending the service life of the device.

[0018] As an embodiment disclosed by the utility model, a gas storage cavity is provided in the second column, and the gas storage cavity is connected with the gas containing cavity on the cross beam and is sealed relative to the outside. The gas storage cavity is provided in the second column so that the volume of gas contained in the gas containing cavity in the cross beam of the square battery rigid airbag device is expanded, and the gas pressure in the gas containing cavity in the cross beam is further reduced, thereby further reducing the frequency of using the exhaust valve or vacuum pump and extending the service life of the device.

[0019] As an embodiment disclosed by the utility model, the distance between the "stop" of the positioning locking mechanism and the air inlet on the crossbeam is equal to the height of the target square battery injection port relative to the bottom of the battery or the height relative to the surface of the cover plate at the other end of the battery. Since the distance between the "stop" of the positioning locking mechanism and the air inlet on the crossbeam is equal to the height of the target square battery injection port relative to the bottom of the battery or the height relative to the surface of the cover plate at the other end of the battery, the battery installed in the airbag device and locked by the "stop" of the locking mechanism can ensure that its injection port is in close contact with the air inlet of the gas containing chamber on the crossbeam and always remain sealed, ensuring the sealing performance between the air inlet and the battery injection port, preventing gas leakage, and maintaining the normal working state of the airbag device.

[0020] In addition, the "stop" of the positioning locking mechanism ensures that the battery filling port is in close contact with the air inlet of the gas containing chamber on the crossbeam and is always sealed. This design can ensure that the position of the target square battery in the device is more stable, which helps to reduce the shaking and movement of the battery during the formation process and improve the stability and reliability of the device.

[0021] As an implementation mode disclosed by the utility model, a rubber sealing ring is arranged between the air inlet on the crossbeam and the battery cell injection port, and the rubber sealing ring realizes plane sealing.

[0022] The rubber sealing ring in this solution can effectively fill the gap between the air inlet and the injection port of the target square battery, achieving a plane seal; this sealing method can effectively prevent gas leakage, ensure the airtightness of the gas inside the airbag device, and improve the reliability and safety of the system. In addition, the rubber sealing ring has excellent pressure resistance and corrosion resistance, can withstand high gas pressure without deformation or damage, can also resist erosion by media such as gas and liquid, is not easily damaged by chemical substances, and improves the stability of the entire system. At the same time, the installation of the rubber sealing ring is relatively simple, does not require complex tools and techniques, and is convenient for the assembly and maintenance of the device; reduces the installation and maintenance costs of the device and improves the convenience of operation.

[0023] As an embodiment disclosed by the utility model, the positioning locking mechanism at the lower ends of the first column and the second column is connected to the square wedge block with the guide rod through a spring, and the spring is sleeved on the guide rod; the spring is extended to push out the square wedge block and ensure that it partially exceeds the surface of the first slide groove and the second slide groove; the spring is compressed to retract the square wedge block and ensure that it does not exceed the surface of the corresponding first slide groove and the second slide groove.

[0024] When the spring is extended, the square wedge will be pushed out and partially exceed the surface of the first slide groove and the second slide groove, thereby ensuring that the target square battery is firmly positioned in the correct position and ensuring that the injection port of the target square battery is in close contact with the air inlet on the cross beam of the airbag device and always remains sealed; when the spring is compressed, the square wedge will be retracted and ensure that it does not exceed the surface of the slide groove, and the target square battery can be smoothly loaded into or taken out of the first slide groove and the second slide groove.

[0025] At the same time, the design of the spring and the guide rod makes the positioning locking mechanism stable and reliable, improving the versatility and applicability of the device. In addition, this connection method is relatively simple, easy to install and maintain, and does not require complex tools and technical support; this helps to reduce the production cost and maintenance cost of the device and improves the convenience of operation.

[0026] As an embodiment disclosed by the utility model, the positioning and locking mechanism at the lower end of the first column and the second column includes a cam with a "stop"; when the cam rotates to the locking position, the "stop" on the cam exceeds the surface of the first slide groove and the second slide groove; when the cam rotates, the "stop" on the cam is retracted into the surface of the first slide groove and the second slide groove. When the cam rotates to the locking position, the stop on the cam will exceed the surface of the first slide groove and the second slide groove, thereby ensuring that the target square battery is firmly positioned in the correct position, ensuring that the injection port of the target square battery is in close contact with the air inlet on the cross beam of the airbag device and always remains sealed. When the cam rotates, the "stop" on the cam is retracted into the surface of the first slide groove and the second slide groove, and the target square battery is smoothly loaded into or taken out of the first slide groove and the second slide groove.

[0027] As one of the main components of the positioning lock, the cam has a relatively simple and compact structure, which can effectively utilize the internal space of the device and improve the compactness of the design of the device.

[0028] As an embodiment disclosed by the utility model, the positioning locking mechanism at the lower ends of the first column and the second column includes a first pair of magnet buckles and a second pair of magnet buckles; a magnet of the first pair of magnet buckles is fixed to the lower end of the first column, a magnet of the second pair of magnet buckles is fixed to the lower end of the second column, and the remaining two magnets are respectively fixed to the two ends of a cross bar, and the cross bar is connected and fixed to the first column and the second column by attracting each other through the magnetic attraction between the magnet buckles; the first column, the cross beam, the second column, and the cross bar form a U-shaped structure.

[0029] In this solution, the first and second pairs of magnetic buckles can be firmly fixed to the lower ends of the first and second columns and the two ends of the crossbar through the attraction of magnets. This design ensures that the battery is firmly fixed in the device and prevents accidental movement or shaking during use.

[0030] In addition, the design of the magnetic buckle is simple, without the need for complex mechanical parts or complex installation processes. The assembly and maintenance of the device are easier. The magnetic structure does not require external energy supply and can achieve the fixing function only by the attraction of the magnet. There is no need to consider power supply issues, which simplifies the structure, saves energy, and enhances environmental adaptability.

[0031] As an embodiment disclosed by the utility model, the positioning and locking mechanism at the lower ends of the first column and the second column includes a first positioning pin, a second positioning pin, and a cross bar; the first positioning pin is assembled in a pin hole with the same diameter as the first pin and preset at the lower end of the first column, and the center line of the pin hole is set in the center of the first slide groove and is perpendicular to the first slide groove surface; the second positioning pin is assembled in a pin hole with the same diameter as the second pin and preset at the lower end of the second column, and the center line of the pin hole is set in the center of the second slide groove and is perpendicular to the second slide groove surface; positioning pin holes with the same diameter as the first positioning pin and the second positioning pin are respectively preset at both ends of the cross bar; the cross bar is fixed to the lower ends of the first column and the second column by inserting the first positioning pin and the second positioning pin into the pin holes of the cross bar, and the first column, the cross beam, the second column, and the cross bar form a U-shaped structure.

[0032] In this solution, the first positioning pin and the second positioning pin are inserted from the outside of the first column and the second column respectively and pass through the pin holes of the first column and the second column respectively, and enter the pin holes at both ends of the crossbar, so as to fix the crossbar between the first column and the second column to form a square structure; this design ensures that the target square battery is securely fixed in the airbag device and prevents the target square battery from moving or shaking during use. The distance from the upper plane of the crossbar to the air inlet on the crossbeam can also be flexibly adjusted by adjusting the position of the pin holes of the first column and the second column to adapt to square batteries of different heights and sizes, thereby improving the versatility and applicability of the device.

[0033] The design of the positioning pin locking structure is simple, the insertion and extraction of the positioning pin are easy to achieve, and the cost is low. No complicated mechanical parts or complicated installation process are required, and the assembly and maintenance of the device are also simple.

[0034] The door-shaped structure and column with slide groove design of the square battery rigid airbag device enable the device to effectively protect the square battery, reduce the negative impact of external impact on the battery during the static, formation, aging and other process after liquid injection, and improve the stability and safety of the battery during the static, formation, aging and other process after liquid injection; an exhaust valve is arranged on the gas containing chamber, and the exhaust valve is set with a preset opening pressure. The exhaust valve can automatically open when the pressure in the gas containing chamber exceeds the preset pressure to release excess pressure, thereby ensuring that the pressure inside the airbag device is always within a safe range, thereby improving the reliability and safety of the device; a simple and stable positioning locking mechanism is adopted, which can conveniently fix the target square battery and also conveniently remove the target square battery, thereby improving the convenience of manual operation and the adaptability to the use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a three-dimensional schematic diagram of a battery rigid airbag device disclosed in the utility model;

[0037] Figure 2 It is a cross-sectional schematic diagram of a battery rigid airbag device disclosed in the utility model with a square wedge retracted;

[0038] Figure 3 yes Figure 2 A partial enlarged schematic diagram of

[0039] Figure 4 It is a cross-sectional schematic diagram of a battery rigid airbag device disclosed in the utility model with a square wedge extending out;

[0040] Figure 5 yes Figure 4 A partial enlarged schematic diagram of

[0041] Figure 6 It is a cross-sectional schematic diagram of a battery rigid airbag device disclosed in the utility model;

[0042] in

[0043] 1. First column, 11. First slide slot, 2. Second column, 21. Second slide slot, 3. Crossbeam, 31. Gas containing chamber, 32. Air inlet, 33. Air storage chamber, 34. Exhaust valve, 35. First port, 36. Second port, 4. Target square battery, 41. Liquid filling port, 5. Positioning locking mechanism, 51. Spring, 52. Guide rod, 53. Square wedge, 54. Lever, 55. Magnetic buckle. Implementation

[0044] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0045] 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.

[0046] In the present invention, unless otherwise specified, directional words such as "up, down, left, right" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0047] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0048] The present invention will be described in detail below with reference to the accompanying drawings.

[0049] Example 1

[0050] like Figure 1 As shown, this embodiment describes a rigid airbag device suitable for a square battery, comprising a first column 1, a crossbeam 3 and a second column 2, wherein the upper end of the first column 1 is connected to the upper end of the second column 2 through the crossbeam 3, so that the first column 1, the crossbeam 3 and the second column 2 present a gate-shaped structure;

[0051] A sealed gas containing chamber 31 is provided in the crossbeam 3, and an air inlet 32 ​​with a planar sealing structure is provided on one side of the crossbeam 3 facing the first column 1 and the second column 2; the air inlet 32 ​​is closely connected with the liquid injection port 41 of the target square battery and is always kept sealed, and the air inlet 32 ​​is connected with the gas containing chamber 31;

[0052] The first column 1 and the second column 2 are respectively provided with a first chute 11 and a second chute 21 which are parallel to each other and have the same width and length. The width of the first chute 11 and the second chute 21 are both equal to the thickness of the target square battery; the farthest distance between the first chute 11 and the second chute 21 is equal to the width of the target square battery; the first chute 11 and the second chute 21 limit the left and right, front and back and movement displacement of the target square battery 4; the lower end of the first column 1 and the lower end of the second column 2 are both provided with a positioning locking mechanism 5; the positioning locking mechanism 5 limits the up and down displacement of the target square battery, so that the target square battery is fixed at the correct position between the crossbeam 3, the first chute 11 and the second chute 21, and the air inlet 32 ​​and the liquid injection port 41 of the target square battery are in close contact and always kept sealed and airtight, so as to ensure that the humid gas in the external environment does not enter the interior of the target square battery;

[0053] The crossbeam 3 is provided with a first opening 35 and a second opening 36 through which the positive and negative probes of the battery formation can pass. The first opening 35 and the second opening 36 correspond to the positive and negative poles of the target square battery respectively. The positive and negative probes of the battery formation pass through the first opening 35 and the second opening 36 respectively to contact and connect with the positive and negative poles of the target square battery; the first opening 35, the second opening 36 and the gas containing chamber 31 are not connected, so that the gas containing chamber 31 is airtight and leak-proof.

[0054] An exhaust valve 34 is provided at either the left or right end of the crossbeam 3. The exhaust valve 34 is connected to the gas containing chamber 31. The exhaust valve 34 opens and releases the pressure after the internal pressure of the gas containing chamber 31 exceeds a preset pressure. The exhaust valve 34 can also be connected to a vacuum pump to extract the gas in the gas containing chamber 31.

[0055] The design of the door-shaped structure of the square battery rigid airbag device can effectively fix and protect the square battery, and reduce the negative impact caused by external impact on the battery during the standing, formation, aging and other processes after liquid injection; the planar sealing structure of the air inlet 32 ​​on the crossbeam of the square battery rigid airbag device ensures that the injection port 41 of the target square battery 4 and the air inlet 32 ​​on the crossbeam are in close contact and always remain sealed, ensuring that the target square battery 4 is prevented from humid gas from the external environment from entering the battery during the standing, formation, aging and other processes after liquid injection; the gas entering the gas containing chamber 31 through the air inlet 32 ​​can be stored in the containing chamber without leakage, and the closed state of the entire device can be well maintained.

[0056] The target square battery is accurately positioned in the door-shaped structure through the first slide groove 11, the second slide groove 21 and the positioning locking mechanism 5, and the target square battery is maintained in a correct and stable position through the above three structures, thereby effectively preventing the movement and shaking of the battery and ensuring that the gas in the external environment does not enter the battery.

[0057] When the battery is formed, the positive and negative probes of the formation power supply are respectively connected to the positive and negative poles of the battery through the first opening 35 and the second opening 36 provided on the cross beam 3, so that the battery can be directly connected to the formation power supply without disassembling the rigid airbag device, thereby completing the formation process of the target square battery.

[0058] An exhaust valve 34 is provided on one side of the gas containing chamber 31 , and a preset opening pressure is set for the exhaust valve 34 . The exhaust valve 34 can automatically open when the pressure in the gas containing chamber 31 exceeds the preset pressure to release the excess pressure.

[0059] In this embodiment, the distance between the "stop" of the positioning locking mechanism 5 and the air inlet 32 ​​on the crossbeam 3 is equal to the height of the injection port 41 of the target square battery relative to the bottom of the battery. The battery placed in this position can ensure close contact between its injection port 41 and the air inlet 32 ​​and always maintain a seal, which helps to ensure the sealing performance between the air inlet 32 ​​and the battery injection port 41, and prevent humid gases from the external environment from entering the battery and affecting the battery performance.

[0060] The air inlet 32 ​​on the crossbeam 3 is provided with a sealing ring resistant to electrolyte corrosion, which realizes plane sealing, effectively prevents gas leakage, and ensures the airtightness of the gas containing chamber 31 of the rigid airbag device.

[0061] Example 2

[0062] like Figure 1 As shown, this embodiment describes a rigid airbag device suitable for a square battery, comprising a first column 1, a crossbeam 3 and a second column 2, wherein the upper end of the first column 1 is connected to the upper end of the second column 2 through the crossbeam 3, so that the first column 1, the crossbeam 3 and the second column 2 present a gate-shaped structure;

[0063] A sealed gas containing chamber 31 is provided in the crossbeam 3, and an air inlet 32 ​​with a planar sealing structure is provided on one side of the crossbeam 3 facing the first column 1 and the second column 2; the air inlet 32 ​​is closely connected with the liquid injection port 41 of the target square battery 4 and is always kept sealed, and the air inlet 32 ​​is connected with the gas containing chamber 31;

[0064] The first column 1 and the second column 2 are respectively provided with a first chute 11 and a second chute 21 which are parallel to each other and have the same width and length. The width of the first chute 11 and the second chute 21 are both equal to the thickness of the target square battery 4; the maximum distance between the first chute 11 and the second chute 21 is equal to the width of the target square battery 4; the first chute 11 and the second chute 21 limit the left and right and front and back movement displacement of the target square battery 4; the lower end of the first column 1 and the lower end of the second column 2 are both provided with a positioning locking mechanism 5;

[0065] The positioning locking mechanism 5 limits the up and down movement of the target square battery 4, so that the target square battery 4 is fixed in the correct position between the crossbeam 3, the first slide groove 11, and the second slide groove 21, and the air inlet 32 ​​on the crossbeam and the liquid injection port 41 of the target square battery 4 are in close contact and remain sealed, ensuring that the humid gas in the external environment cannot enter the interior of the target square battery.

[0066] The crossbeam 3 is provided with a first opening 35 and a second opening 36 through which the positive and negative probes of the formation power source can pass. The first opening 35 and the second opening 36 correspond to the positive and negative poles of the target square battery 4 respectively. The positive and negative probes of the formation power source respectively pass through the first opening 35 and the second opening 36 to contact and connect with the positive and negative poles of the target square battery 4; the first opening 35, the second opening 36 and the gas containing chamber 31 are not connected, so that the gas containing chamber 31 is sealed and leak-proof.

[0067] An exhaust valve 34 is provided at either the left or right end of the crossbeam 3, and the exhaust valve 34 is connected to the gas containing chamber 31. The exhaust valve 34 opens and releases the pressure after the internal pressure of the gas containing chamber 31 exceeds a preset pressure. The exhaust valve 24 is selected as a pin-type exhaust valve, and the rigid airbag device is connected to the vacuum system through the exhaust valve 24 to extract the gas in the gas containing chamber 31.

[0068] The design of the door-shaped structure of the square battery rigid airbag device can effectively fix and protect the square battery, and reduce the negative impact caused by external impact on the battery during the standing, forming, aging and other processes after liquid injection; the planar sealing structure of the air inlet 32 ​​on the crossbeam of the square battery rigid airbag device ensures the close contact and sealing between the injection port 41 of the target square battery 4 and the air inlet 32 ​​on the crossbeam, ensuring that the target square battery 4 is prevented from humid gas from the external environment from entering the battery during the standing, forming, aging and other processes after liquid injection; the gas entering the gas containing chamber 31 through the air inlet 32 ​​can be stored in the containing chamber without leakage, and the closed state of the entire device can be well maintained.

[0069] Through the first slide groove 11, the second slide groove 21 and the positioning locking mechanism 5, the target square battery 4 is accurately positioned in the door-shaped structure, and the target square battery 4 is fixed and maintained in the correct position through the above three structures, thereby effectively preventing the battery from moving and shaking.

[0070] When the battery is formed, the positive and negative probes of the formation power supply are respectively connected to the positive and negative poles of the battery through the first opening 35 and the second opening 36 provided on the cross beam 3, so that the battery can be directly connected to the formation power supply without disassembling the rigid airbag device, thereby completing the formation process of the target square battery.

[0071] An exhaust valve 34 is provided on the gas containing chamber 31 , and a preset opening pressure is set for the exhaust valve 34 . The exhaust valve 34 can automatically open when the pressure in the gas containing chamber 31 exceeds the preset pressure to release the excess pressure.

[0072] In this embodiment, the distance between the "stop" of the positioning locking mechanism 5 and the air inlet 32 ​​on the crossbeam 3 is equal to the height of the liquid filling port 41 of the target square battery 4 relative to the bottom of the battery. The battery placed in this position can ensure close contact between its liquid filling port 41 and the air inlet 32 ​​and maintain a reliable seal, which helps to ensure the sealing performance between the air inlet 32 ​​and the battery filling port 41, and prevent humid gases from the external environment from entering the battery.

[0073] The air inlet 32 ​​on the crossbeam 3 is provided with a sealing ring resistant to electrolyte corrosion, which realizes plane sealing, effectively prevents gas leakage, and ensures the airtightness of the gas inside the rigid airbag device.

[0074] like Figure 2 As shown, in this embodiment, the first column 1 and the second column 2 are both provided with a gas storage cavity 33, and the two gas storage cavities 33 are connected with the gas containing cavity 31 on the crossbeam 3 and are sealed relative to the outside. The gas storage cavity 33 is provided in the first column 1 and the second column 2 to store more gas, so that the volume of gas contained in the battery rigid airbag device is expanded, thereby reducing the frequency of using the exhaust valve 34 and the vacuum pump, and extending the service life of the system; and the increase in the volume of gas contained in the gas containing cavity 31 can adapt to batteries 4 of different material systems to produce gases of different volumes and pressures at different process temperatures; thus expanding the adaptability of the battery rigid airbag device.

[0075] Example 3

[0076] like Figure 1 As shown, this embodiment describes a rigid airbag device suitable for a square battery, comprising a first column 1, a crossbeam 3 and a second column 2, wherein the upper end of the first column 1 is connected to the upper end of the second column 2 through the crossbeam 3, so that the first column 1, the crossbeam 3 and the second column 2 present a gate-shaped structure;

[0077] A sealed gas containing chamber 31 is provided in the crossbeam 3, and an air inlet 32 ​​with a planar sealing structure is provided on one side of the crossbeam 3 facing the first column 1 and the second column 2; the air inlet 32 ​​is closely connected with the liquid injection port 41 of the target square battery 4 and is always kept sealed, and the air inlet 32 ​​is connected with the gas containing chamber 31;

[0078] The first column 1 and the second column 2 are respectively provided with a first chute 11 and a second chute 21 which are parallel to each other and have equal width and length. The width of the first chute 11 and the second chute 21 is equal to the thickness of the target square battery 4; the farthest distance between the first chute 11 and the second chute 21 is equal to the width of the target square battery 4; the lower end of the first column 1 and the lower end of the second column 2 are both provided with a positioning locking mechanism 5;

[0079] The positioning locking mechanism 5 limits the up and down displacement of the target square battery 4, so that the target square battery 4 is fixed at the correct position between the crossbeam 3, the first slide groove 11, and the second slide groove 21, and the air inlet 32 ​​and the liquid injection port 41 of the target square battery 4 are in close contact and remain sealed;

[0080] The crossbeam 3 is provided with a first opening 35 and a second opening 36 through which the positive and negative probes of the formation power supply can pass. The first opening 35 and the second opening 36 correspond to the positive and negative poles of the target square battery 4 respectively. The positive and negative probes of the formation power supply pass through the first opening 35 and the second opening 36 respectively to contact and connect with the positive and negative poles of the target square battery 4; the first opening 35, the second opening 36 and the gas containing chamber 31 are not connected, so that the gas containing chamber 31 is airtight and leak-proof.

[0081] An exhaust valve 34 is provided at either the left or right end of the crossbeam 3. The exhaust valve 34 is connected to the gas containing chamber 31. The exhaust valve 34 opens and releases the pressure after the internal pressure of the gas containing chamber 31 exceeds a preset pressure. The exhaust valve 24 is selected as a pin-type exhaust valve. The rigid airbag device is connected to the vacuum system through the exhaust valve 24 to extract the gas in the gas containing chamber 31.

[0082] The design of the door-shaped structure of the square battery rigid airbag device can effectively fix and protect the square battery, and reduce the negative impact caused by external impact on the battery during the standing, forming, aging and other processes after liquid injection; the planar sealing structure of the air inlet 32 ​​on the crossbeam of the square battery rigid airbag device ensures the close contact and sealing between the injection port 41 of the target square battery 4 and the air inlet 32 ​​on the crossbeam, ensuring that the target square battery 4 is prevented from humid gas from the external environment from entering the battery during the standing, forming, aging and other processes after liquid injection; the gas entering the gas containing chamber 31 through the air inlet 32 ​​can be stored in the containing chamber without leakage, and the closed state of the entire device can be well maintained.

[0083] The target square battery 4 is accurately positioned in the door-shaped structure through the first slide groove 11, the second slide groove 21 and the positioning locking mechanism 5, and the target square battery 4 is fixed in the correct position through the above three structures, thereby effectively preventing the movement and shaking of the battery.

[0084] The positive and negative probes of the formation power supply contact and connect with the positive and negative poles of the battery through the first opening 35 and the second opening 36 provided on the crossbeam 3, so that the battery can be directly connected to the formation power supply without being disassembled, thereby completing the formation process of the target square battery 4.

[0085] An exhaust valve 34 is provided on the gas containing chamber 31 , and a preset opening pressure is set for the exhaust valve 34 . The exhaust valve 34 can automatically open when the pressure in the gas containing chamber 31 exceeds the preset pressure to release the excess pressure.

[0086] In this embodiment, the distance between the "stop" of the positioning locking mechanism 5 and the air inlet 32 ​​on the crossbeam 3 is equal to the height of the injection port 41 of the target square battery 4 relative to the bottom of the battery. The battery placed in this position can ensure close contact with the air inlet 32 ​​and maintain a seal, which helps to ensure the sealing performance between the air inlet 32 ​​and the battery injection port 41, prevent humid air from the external environment from entering the battery, and prevent gas leakage.

[0087] A rubber sealing ring is provided at the air inlet 32 ​​on the crossbeam 3 to achieve plane sealing, effectively preventing moist air from entering the battery and preventing gas leakage, thereby ensuring the airtightness of the gas containing chamber 31 inside the rigid airbag device.

[0088] like Figure 2 As shown, in this embodiment, the first column 1 and the second column 2 are both provided with a gas storage cavity 33, and the two gas storage cavities 33 are connected with the gas containing cavity 31 on the crossbeam 3 and are sealed relative to the outside. The gas storage cavity 33 is provided in the first column 1 and the second column 2 to store more gas, so that the volume of gas contained in the battery rigid airbag device is expanded, thereby reducing the frequency of using the exhaust valve 34 and the vacuum pump, and extending the service life of the system; and the increase in the volume of gas contained in the gas containing cavity 31 can adapt to batteries 4 of different material systems to produce gases of different volumes and pressures at different process temperatures; thus expanding the adaptability of the battery rigid airbag device.

[0089] like Figure 3 , Figure 4 , Figure 5As shown, the positioning locking mechanism 5 at the lower end of the first column 1 and the second column 2 is connected to the square wedge 53 with the guide rod 52 through the spring 51, and the spring 51 is sleeved on the guide rod 52; when the spring 51 is extended, a part of the square wedge 53 exceeds the surface of the first slide groove 11 and the second slide groove 21; by moving the lever 54, the spring 51 is compressed, the square wedge 53 is retracted, and it is ensured that it does not exceed the surface of the corresponding first slide groove 11 and the second slide groove 21.

[0090] Example 4

[0091] like Figure 1 As shown, this embodiment describes a rigid airbag device suitable for a square battery, comprising a first column 1, a crossbeam 3 and a second column 2, wherein the upper end of the first column 1 is connected to the upper end of the second column 2 through the crossbeam 3, so that the first column 1, the crossbeam 3 and the second column 2 present a gate-shaped structure;

[0092] A sealed gas containing chamber 31 is provided in the crossbeam 3, and an air inlet 32 ​​with a planar sealing structure is provided on the side of the crossbeam 3 facing the first column 1 and the second column 2; the air inlet 32 ​​is tightly docked and sealed with the injection port 41 of the target square battery 4, and the air inlet 32 ​​is connected with the gas containing chamber 31;

[0093] The first column 1 and the second column 2 are respectively provided with a first chute 11 and a second chute 21 which are parallel to each other and have equal width and length. The width of the first chute 11 and the second chute 21 is equal to the thickness of the target square battery 4; the farthest distance between the first chute 11 and the second chute 21 is equal to the width of the target square battery 4; the lower end of the first column 1 and the lower end of the second column 2 are both provided with a positioning locking mechanism 5;

[0094] The positioning locking mechanism 5 limits the up and down displacement of the target square battery 4, so that the target square battery 4 is fixed at the correct position between the crossbeam 3, the first slide groove 11, and the second slide groove 21, and the air inlet 32 ​​and the liquid injection port 41 of the target square battery 4 are in close contact and remain sealed;

[0095] The crossbeam 3 is provided with a first opening 35 and a second opening 36 through which the positive and negative probes of the formation power supply can pass. The first opening 35 and the second opening 36 correspond to the positive and negative poles of the target square battery 4 respectively. The positive and negative probes of the formation power supply pass through the first opening 35 and the second opening 36 respectively to contact and connect with the positive and negative poles of the target square battery 4; the first opening 35, the second opening 36 and the gas containing chamber 31 are not connected, so that the gas containing chamber 31 is airtight and leak-proof.

[0096] An exhaust valve 34 is provided at either the left or right end of the crossbeam 3. The exhaust valve 34 is connected to the gas containing chamber 31. The exhaust valve 34 opens and releases the pressure after the internal pressure of the gas containing chamber 31 exceeds a preset pressure. The exhaust valve 24 is selected as a pin-type exhaust valve. The rigid airbag device is connected to the vacuum system through the exhaust valve 24 to extract the gas in the gas containing chamber 31.

[0097] The design of the door-shaped structure of the square battery rigid airbag device can effectively fix and protect the square battery, and reduce the negative impact caused by external impact on the battery during the standing, forming, aging and other processes after liquid injection; the planar sealing structure of the air inlet 32 ​​on the crossbeam of the square battery rigid airbag device ensures the close contact and sealing between the injection port 41 of the target square battery 4 and the air inlet 32 ​​on the crossbeam, ensuring that the target square battery 4 is prevented from humid gas from the external environment from entering the battery during the standing, forming, aging and other processes after liquid injection; the gas entering the gas containing chamber 31 through the air inlet 32 ​​can be stored in the containing chamber without leakage, and the closed state of the entire device can be well maintained.

[0098] The target square battery 4 is accurately positioned in the door-shaped structure through the first slide groove 11, the second slide groove 21 and the positioning locking mechanism 5, and the target square battery 4 is fixed in the correct position through the above three structures, thereby effectively preventing the movement and shaking of the battery.

[0099] The positive and negative probes of the formation power supply contact and connect with the positive and negative poles of the battery through the first opening 35 and the second opening 36 provided on the crossbeam 3, so that the battery can be directly connected to the formation power supply without being disassembled, thereby completing the formation process of the target square battery 4.

[0100] An exhaust valve 34 is provided on the gas containing chamber 31 , and a preset opening pressure is set for the exhaust valve 34 . The exhaust valve 34 can automatically open when the pressure in the gas containing chamber 31 exceeds the preset pressure to release the excess pressure.

[0101] In this embodiment, the distance between the "stop" of the positioning locking mechanism 5 and the air inlet 32 ​​on the crossbeam 3 is equal to the height of the target square battery 4 injection port 41 relative to the surface of the cover plate at the other end of the battery. The battery placed in this position can ensure close contact with the air inlet 32 ​​and maintain a seal, which helps to ensure the sealing performance between the air inlet 32 ​​and the battery injection port 41, prevent humid air from the external environment from entering the battery, and prevent gas leakage.

[0102] A rubber sealing ring is provided at the air inlet 32 ​​on the crossbeam 3 to achieve plane sealing, effectively preventing moist air from entering the battery and preventing gas leakage, thereby ensuring the airtightness of the gas containing chamber 31 inside the rigid airbag device.

[0103] An exhaust valve 34 is provided on the gas containing chamber 31 , and a preset opening pressure is set for the exhaust valve 34 . The exhaust valve 34 can automatically open when the pressure in the gas containing chamber 31 exceeds the preset pressure to release the excess pressure.

[0104] like Figure 6 As shown, in this embodiment, the first column 1 and the second column 2 are both provided with a gas storage cavity 33, and the two gas storage cavities 33 are connected with the gas containing cavity 31 on the crossbeam 3 and are sealed relative to the outside. The gas storage cavity 33 is provided in the first column 1 and the second column 2 to store more gas, so that the volume of gas contained in the battery rigid airbag device is expanded, thereby reducing the frequency of using the exhaust valve 34 and the vacuum pump, and extending the service life of the system; and the increase in the volume of gas contained in the gas containing cavity 31 can adapt to batteries 4 of different material systems to produce gases of different volumes and pressures at different process temperatures; thus expanding the adaptability of the battery rigid airbag device.

[0105] The positioning locking mechanism 5 at the lower ends of the first column 1 and the second column 2 includes a first pair of magnet buckles 55 and a second pair of magnet buckles 55; one magnet of the first pair of magnet buckles 55 is fixed to the lower end of the first column 1, and one magnet of the second pair of magnet buckles 55 is fixed to the lower end of the second column 2, and the remaining two magnets are respectively fixed to the two ends of a cross bar, and the cross bar is fixed by attracting each other through the magnetic attraction between the magnet buckles.

Claims

1. A square battery rigid airbag device, characterized in that: It comprises a first column, a crossbeam and a second column, wherein the upper end of the first column is connected to the upper end of the second column through the crossbeam, so that the first column, the crossbeam and the second column present a door-shaped structure; A sealed gas containing cavity is provided in the crossbeam, and an air inlet with a planar sealing structure is provided on one side of the crossbeam facing the first column and the second column; the air inlet is sealed and docked with the liquid injection port of the target square battery, and the air inlet is communicated with the gas containing cavity; A first slide groove and a second slide groove which are parallel to each other and have equal width and length are respectively arranged on the inner sides of the first column and the second column, and the width of the first slide groove and the second slide groove is equal to the thickness of the target square battery; the farthest distance between the first slide groove and the second slide groove is equal to the width of the target square battery; the lower ends of the first column and the second column are both provided with positioning locking mechanisms; The positioning locking mechanism limits the displacement of the target square battery, so that the target square battery is positioned between the crossbeam, the first slide groove, and the second slide groove, and the air inlet on the crossbeam is in close contact with the liquid injection port of the target square battery and always keeps it sealed; The crossbeam is provided with a first opening and a second opening through which the positive and negative formation probes of the battery can pass, the first opening and the second opening respectively correspond to the positive and negative poles of the target square battery, and the positive and negative formation probes respectively pass through the first opening and the second opening to contact the positive and negative poles of the target square battery; the first opening, the second opening and the gas containing cavity on the crossbeam are closed and not connected, so that the gas containing cavity is airtight and leak-proof; An exhaust valve is arranged at either the left or right end of the crossbeam, and the exhaust valve is connected to the gas containing chamber. The exhaust valve opens and releases the pressure after the internal pressure of the gas containing chamber exceeds a preset pressure. The exhaust valve can also be connected to a vacuum pump to extract the gas in the gas containing chamber.

2. The square battery rigid airbag device according to claim 1, characterized in that: An air storage cavity is arranged in the first column, and the air storage cavity is communicated with the gas containing cavity on the cross beam and is airtight and airtight relative to the outside.

3. The square battery rigid airbag device according to claim 1, characterized in that: An air storage cavity is arranged in the second column, and the air storage cavity is communicated with the gas containing cavity on the cross beam and is airtight and airtight relative to the outside.

4. The square battery rigid airbag device according to claim 1, characterized in that: The distance between the stop of the positioning locking mechanism and the air inlet on the crossbeam is equal to the height of the injection port of the target square battery relative to the bottom of the battery or relative to the surface of the cover plate at the other end of the battery.

5. The square battery rigid airbag device according to claim 1, characterized in that: The air inlet on the crossbeam is provided with a rubber sealing ring, and the rubber sealing ring realizes a plane seal between the battery filling port and the air inlet on the crossbeam.

6. The square battery rigid airbag device according to claim 1 or 4, characterized in that: The positioning and locking mechanism at the lower ends of the first column and the second column is connected to the square wedge block with the guide rod through a spring, and the spring is sleeved on the guide rod; the spring is extended to push out the square wedge block so that it partially exceeds the surface of the first slide groove and the second slide groove; the spring is compressed to retract the square wedge block and ensure that it does not exceed the surface of the first slide groove and the second slide groove corresponding to it.

7. The square battery rigid airbag device according to claim 1 or 4, characterized in that: The positioning locking mechanism at the lower end of the first column and the second column includes a cam with a stop; when the cam rotates to the locking position, the stop on the cam exceeds the surface of the first slide groove and the second slide groove; when the cam rotates, the stop on the cam is retracted into the surface of the first slide groove and the second slide groove.

8. The square battery rigid airbag device according to claim 1 or 4, characterized in that: The positioning and locking mechanism at the lower ends of the first column and the second column comprises a first pair of magnet buckles, a cross bar, and a second pair of magnet buckles; one magnet of the first pair of magnet buckles is fixed to the lower end of the first column, and the other magnet is fixed to one end of the cross bar; one magnet of the second pair of magnet buckles is fixed to the lower end of the second column, and the other magnet is fixed to the other end of the cross bar; the cross bar is fixed to the lower ends of the first column and the second column by attracting each other through the magnetic attraction between the magnet buckles; the first column, the cross beam, the second column, and the cross bar form a U-shaped structure.

9. The square battery rigid airbag device according to claim 1 or 4, characterized in that: The positioning and locking mechanism at the lower ends of the first column and the second column comprises a first positioning pin, a cross bar and a second positioning pin; the first positioning pin is assembled in a pin hole with the same diameter as the first pin and preset at the lower end of the first column, and the center line of the pin hole is arranged in the center of the first slide groove and is perpendicular to the first slide groove surface; the second positioning pin is assembled in a pin hole with the same diameter as the second pin and preset at the lower end of the second column, and the center line of the pin hole is arranged in the center of the second slide groove and is perpendicular to the second slide groove surface; positioning pin holes with the same diameter as the first positioning pin and the second positioning pin are respectively preset at both ends of the cross bar; the cross bar is fixed to the lower ends of the first column and the second column by inserting the first positioning pin and the second positioning pin into the pin holes of the cross bar, and the first column, the cross beam, the second column and the cross bar form a U-shaped structure.

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