New energy battery shell with auxiliary nicks
By designing a marking structure with auxiliary marking on the housing of the new energy battery, the problem of difficult timely release of high-temperature and high-pressure gases inside the battery is solved, rapid pressure relief and safe use are achieved, and the explosion-proof performance and use safety of the battery are improved.
Patent Information
- Application Number
- CN202421385921.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-06-17
AI Technical Summary
New energy batteries may cause the accumulation of high-temperature and high-pressure gas during charging and discharging. If they are not discharged in time, it may cause the battery to disintegrate, explode or catch fire, and it is difficult for existing battery cases to effectively prevent explosion-proof and release gas.
A new energy battery case with auxiliary marking is designed, and by extruding to form an extrusion layer and stamping the marking lines and auxiliary markings thereon, forming an easy-to-open marking structure so as to quickly rupture and release gas when the internal pressure reaches a certain level.
It realizes that when the high-temperature and high-pressure gas inside the battery reaches a certain pressure, it quickly opens the pressure relief to avoid the battery explosion, improves the safety of the battery use, and ensures the efficiency of the exhaust effect by limiting the blasting position and controlling the opening size.
Smart Images
Figure CN222802033U_ABST
Abstract
Description
[Technical field]
[0001] The utility model relates to the technical field of explosion-proof of new energy battery shells, in particular to a new energy battery shell with auxiliary notches. [Background Technology]
[0002] As an emerging energy storage medium, new energy batteries have attracted more and more attention due to their advantages such as high energy density, high output power, long charge and discharge life, fast charging, green and pollution-free, wide operating temperature range and low self-discharge. During the battery charging and discharging process, the internal gas production pressure is an extremely important safety factor; and during the use of the battery, due to overcharging, over-discharging, short circuit and other reasons, high-temperature and high-pressure gas may be generated inside the battery. If these high-temperature and high-pressure gases cannot be discharged to the outside of the battery in time, it may cause serious accidents such as battery disintegration, explosion, fire, etc.
[0003] The battery structure in new energy power batteries or energy storage power stations requires that the battery shell must be opened in an explosion-proof manner when the gas pressure in the battery shell reaches 0.7MPa to 2.3MPa. This is because the aluminum or steel materials of new energy batteries will explode before a short circuit occurs, or the electrolyte and other materials will decompose and produce gas after charging for a long time and explode. Therefore, if the battery shell cannot release gas in time to prevent explosion, it will be unsafe for the driving car energy storage power station. At the same time, excessive pressure can easily cause damage to internal materials. [Contents of the utility model]
[0004] The purpose of the utility model is to solve the above-mentioned deficiencies and provide a new energy battery shell with auxiliary notches, which can help the integrated notched bursting valve to quickly open and release pressure, and timely discharge the high-temperature and high-pressure gas inside the battery shell. At the same time, the bursting position can be limited, the opening size can be controlled, and instantaneous release is ensured. The gas release effect is high, and the safety of battery use is improved.
[0005] To achieve the above-mentioned purpose, the utility model provides a new energy battery shell with auxiliary notches, including a new energy battery shell body 1, wherein the new energy battery shell body 1 is a shell-like structure with a cavity inside, and an extrusion layer 2 is formed locally on the new energy battery shell body 1 by extrusion, and a notch line 3 is stamped on the extrusion layer 2, and auxiliary notches 4 are respectively arranged on both sides of the notch line 3, and the auxiliary notches 4 and the notch line 3 constitute an easily opened notch structure, that is, an outer "mouth"-shaped structure, and the notch line 3 is broken after being subjected to the pressure impact inside the new energy battery shell body 1, and is folded in a direction away from the new energy battery shell body 1 with the auxiliary notch 4 as a crease.
[0006] Furthermore, the main body 1 of the new energy battery housing is made of aluminum or steel. The main body 1 of the new energy battery housing is in the shape of a square box or a circular tube. The extrusion layer 2 is arranged on the bottom surface and / or the top cover of the main body 1 of the new energy battery housing, so as to realize rapid outward explosion and quickly release the internal air pressure.
[0007] Furthermore, the cross-section of the scoring line 3 is in the shape of "工" or "王" or "H" or "C" or "U" or "O", etc.
[0008] Furthermore, the scoring line 3 is composed of an upper scoring line, a lower scoring line and a middle scoring line connecting the upper scoring line and the lower scoring line. The auxiliary scoring lines 4 are arranged between the left ends of the upper scoring line and the lower scoring line and between the right ends of the upper scoring line and the lower scoring line. When the scoring line 3 breaks, the middle scoring line tears along the upper scoring line and the lower scoring line and folds outwards with the auxiliary scoring line 4 as the crease, so as to further define the explosion position and control the opening size.
[0009] Furthermore, the scoring line 3 is composed of two symmetrically arranged and connected rectangular blocks up and down or two symmetrically arranged and connected rectangular blocks left and right. After the scoring line 3 folds outwards with the auxiliary scoring line 4 as the crease, a rectangular explosion opening is formed, which further helps the scoring line to explode quickly and timely discharge the high-temperature and high-pressure gas inside the battery case to avoid battery explosion.
[0010] Furthermore, the auxiliary scoring line 4 is a discontinuous dotted scoring line, and there are gaps reserved between both ends of the auxiliary scoring line 4 and the scoring line 3, so that it will not fly outwards while exploding quickly, eliminating potential safety hazards.
[0011] Furthermore, the surfaces of the scoring line 3 and the auxiliary scoring line 4 are both provided with concave-convex patterns, and the concave-convex patterns are several concave-convex grooves. The setting of the concave-convex patterns here can make it easier to break and release pressure.
[0012] Furthermore, the thickness of the extrusion layer 2 is 0.3 mm - 0.6 mm, and the remaining thickness of the scoring line 3 and the auxiliary scoring line 4 is 0.10 mm - 0.22 mm, so as to achieve the purpose of explosion-proof pressure of 0.7 MPa to 2.3 MPa.
[0013] Furthermore, the main body 1 of the new energy battery housing is a circular tube, and the extrusion layer 2 is arranged on the tube wall and / or the tube cover of the main body 1 of the new energy battery housing, and the extrusion layer 2 is evenly distributed along the circumference.
[0014] Compared with the prior art, the utility model has the following advantages:
[0015] (1) Since the battery shell of the utility model is relatively thick, an extrusion layer is formed by extrusion to reduce the thickness of a local area, thereby facilitating the stamping process of the score line and the auxiliary score line, making it easy to punch open the score line, thereby improving the explosion-proof performance of the battery shell;
[0016] (2) The extrusion layer of the utility model can be arranged on any surface of the battery housing body, and its arrangement is flexible, and the structure is simple and easy to process. When the battery is subjected to a large pressure, it can be cracked in time to release the pressure, and the explosion-proof effect is good;
[0017] (3) The score line of the utility model breaks after being impacted by internal pressure, and folds outward with the auxiliary score line as a fold, so that the score line remains connected to the shell after being broken, and will not fly out quickly, nor will it damage nearby batteries, eliminating safety hazards;
[0018] (4) The auxiliary notch of the utility model can help the notch line to explode quickly, thereby timely discharging the high-temperature and high-pressure gas inside the battery shell, avoiding battery explosion and improving the safety of battery use;
[0019] (5) The utility model provides two auxiliary notches, which not only can limit the blasting position and control the opening size, but also can achieve a 90-degree full opening of the opening, thereby ensuring instant release and high deflation effect;
[0020] (6) The utility model avoids the problem that the opening without auxiliary notches can only be torn and broken little by little, and the internal pressure has no time to be released, and the pressure release is very slow, which affects the explosive release and even creates a safety hazard;
[0021] (7) The utility model can be mass-produced through one-time design and mold cost, thereby reducing production costs, and the processing technology is simple, which greatly improves production efficiency and achieves the purpose of explosion-proof and safe operation of new energy batteries. [Drawings]
[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model (unexploded state);
[0023] Figure 2 yes Figure 1 A schematic diagram of the front structure of
[0024] Figure 3 yes Figure 1 A schematic diagram of the side structure of
[0025] Figure 4 yes Figure 1 Schematic diagram of the bottom structure;
[0026] Figure 5It is a three-dimensional structural schematic diagram of the utility model (blasting state);
[0027] Figure 6 yes Figure 5 A schematic diagram of the front structure of
[0028] Figure 7 yes Figure 5 A schematic diagram of the side structure of
[0029] Figure 8 yes Figure 5 Schematic diagram of the bottom structure;
[0030] Fig. 9 It is a schematic diagram of the three-dimensional structure of the utility model before improvement (unexploded state);
[0031] Fig.10 yes Fig. 9 A schematic diagram of the front structure of
[0032] Fig.11 yes Fig. 9 A schematic diagram of the side structure of
[0033] Fig.12 yes Fig. 9 Schematic diagram of the bottom structure;
[0034] Fig.13 It is a three-dimensional structural schematic diagram of the utility model before improvement (blasting state);
[0035] Fig.14 yes Fig.13 A schematic diagram of the front structure of
[0036] Fig.15 yes Fig.13 A schematic diagram of the side structure of
[0037] Fig.16 yes Fig.13 Schematic diagram of the bottom structure;
[0038] Figures 17 to 20 It is a schematic diagram of the structure in which the scoring line and the auxiliary scoring are arranged on the top cover of the present invention;
[0039] In the figure: 1. New energy battery shell body 2. Extrusion layer 3. Score line 4. Auxiliary score. [Specific implementation method]
[0040] The utility model is further described below in conjunction with the accompanying drawings:
[0041] As attached Figure 1 To Attachment Figure 8As shown in the figure, the utility model provides a new energy battery shell with auxiliary scoring, which includes a new energy battery shell body 1. The new energy battery shell body 1 is a shell-shaped structure with a cavity inside. A pressing layer 2 is formed on a part of the new energy battery shell body 1 by extrusion. A scoring line 3 is punched on the pressing layer 2. The cross-section of the scoring line 3 is in the shape of "工" or "王" or "H" or "C" or "U" or "O", etc. Auxiliary scoring 4 is arranged on both sides of the scoring line 3. The auxiliary scoring 4 and the scoring line 3 form a scoring structure that is easy to open, that is, an outer "口" - shaped structure. When the scoring line 3 is impacted by the pressure inside the new energy battery shell body 1, it breaks and folds away from the new energy battery shell body 1 with the auxiliary scoring 4 as the crease; the thickness of the pressing layer 2 is 0.3mm - 0.6mm, and the remaining thickness of the scoring line 3 and the auxiliary scoring 4 is 0.10mm - 0.22mm, so as to achieve the purpose of explosion-proof pressure from 0.7MPa to 2.3MPa.
[0042] Among them, the scoring line 3 is composed of an upper scoring line, a lower scoring line, and a middle scoring line connecting the upper scoring line and the lower scoring line. The auxiliary scoring 4 is arranged between the left ends of the upper scoring line and the lower scoring line, and between the right ends of the upper scoring line and the lower scoring line. When the scoring line 3 breaks, the middle scoring line tears along the upper scoring line and the lower scoring line and folds outwards with the auxiliary scoring 4 as the crease, so as to further limit the blasting position and control the opening size.
[0043] The scoring line 3 is composed of two symmetrically connected rectangular blocks up and down or two symmetrically connected rectangular blocks left and right. After the scoring line 3 folds outwards with the auxiliary scoring 4 as the crease, a rectangular blasting opening is formed, which further helps the scoring line to burst quickly and timely discharge the high-temperature and high-pressure gas inside the battery shell to avoid battery explosion. The auxiliary scoring 4 is a discontinuous dotted-line scoring, and there are gaps reserved between both ends of the auxiliary scoring 4 and the scoring line 3, so that it will not fly outwards while bursting quickly, eliminating potential safety hazards. Concave-convex patterns are arranged on the surfaces of the scoring line 3 and the auxiliary scoring 4. The concave-convex patterns are several concave-convex grooves. The setting of the concave-convex patterns here can make it easier to break and release pressure.
[0044] The new energy battery shell body 1 is made of aluminum or steel. The new energy battery shell body 1 can be set as a square box shape (including a square shell and a square cover) or a circular tubular shape (including a round tube and a round cover). The pressing layer 2 is arranged on the bottom surface and / or the top cover of the new energy battery shell body 1, so as to achieve rapid outward blasting and quickly release the internal air pressure; the new energy battery shell body 1 can also be set as a circular tube shape, and the pressing layer 2 is arranged on the tube wall and / or the tube cover of the new energy battery shell body 1, and the pressing layer 2 is evenly distributed along the circumference.
[0045] The utility model provides a processing method for a new energy battery shell with auxiliary notches, comprising the following steps:
[0046] 1) First, aluminum or steel is used to make a new energy battery housing body 1, and the new energy battery housing body 1 is a square box-shaped body including a square cover or a round cover, and can be stamped into an integral notched explosion-proof valve;
[0047] 2) Then, a punch press is used to stretch and extrude for multiple times to compact the shrinkage holes of the partially extruded material of the new energy battery housing body 1 to form a dense organizational structure, that is, to form an extrusion layer 2;
[0048] 3) When the thickness of the extruded material is between 0.3 mm and 0.6 mm, a scoring line 3 is punched so that the residual thickness of the material after scoring is between 0.10 mm and 0.22 mm;
[0049] 4) Finally, auxiliary notches 4 are punched on both sides of the notch line 3, so that when the notch line 3 is ruptured by the internal pressure impact, it is quickly folded away from the new energy battery housing body 1 with the auxiliary notches 4 as the fold.
[0050] 5) Through testing, it was found that the punch shape of the auxiliary notch 4 is the most stable and has the longest service life when it is an inverted triangle.
[0051] As attached Fig. 9 To Attachment Fig.16 The structure shown in the figure is the structure before the improvement of the utility model (no auxiliary notches are set). By comparing with the utility model, it can be found that the structure without auxiliary notches has the following defects: during explosion, the opening can only be torn open slowly, and the pressure relief is very slow, which may cause the internal pressure to be insufficiently released, and the gas cannot be fully released, or even cannot be opened, and only leaks. If it cannot be released in time, deformation will occur from other surfaces, which may easily cause safety hazards. In addition, it is difficult to control the opening area of the explosion without auxiliary notches. If the opening area is too small, the gas release is small, and the slow pressure relief may easily cause fire. After setting two auxiliary notches, on the one hand, it is convenient for the opening to quickly become larger, so that the opening is fully opened at 90 degrees, thereby ensuring that it is fully opened when released, released instantly, and has a high pressure relief effect. On the other hand, while limiting the position, the opening size can be controlled to prevent the opening from being too large.
[0052] The life of mass-produced battery cases should be about 30 years, but if the pressure cannot be effectively released, fires often occur. To ensure that the gas is released instantly and the pressure relief effect is good, adding auxiliary notches is currently a more effective safety method. Each product has different power, opening size, pressure, and material thickness, but the principle is the same. They all need to reach the designed explosion value and need continuous improvement.
[0053] The utility model can adopt aluminum or steel, and use a punch press to extrude multiple times to compact the shrinkage of the extruded material to form a denser organizational structure, and make the material thickness reach about 0.45mm. When the thickness of the extruded part of the material is about 0.45mm, the scoring line and the auxiliary scoring are punched, and the residual thickness of the material after the scoring is only 0.10mm to 0.2mm. Tests show that the thickness of the material after the scoring is only between 0.10mm and 0.2mm, which can achieve the purpose of explosion-proof pressure of 0.7MPa to 2.3MPa. The basis for controlling the material thickness after notching to between 0.10mm and 0.2mm is: new energy vehicles in particular require that the battery shell must be opened explosion-proof when the gas reaches 0.7MPa to 2.3MPa. To this end, through many experiments, we have purchased booster pumps, proportional valves, pressure monitoring, and jointly developed a "residual thickness meter" (to measure the material thickness after notching), processed the clamps of the press mechanism and other devices, and adopted PLC control. After stamping the notch line, the residual thickness of the material is controlled between 0.10mm and 0.2mm, and the bursting pressure can successfully produce an explosion at 0.7MPa to 2.5MPa.
[0054] The utility model can also use aluminum material with a thickness of 1.8mm. First, the aluminum shell is stretched and extruded three times to compact the shrinkage holes of the partially extruded material to form a denser organizational structure, and the material thickness reaches about 0.5mm; the upper part of the aluminum shell needs to be gradually thinned after multiple stretching until it meets the size required by the bursting pressure; when the thickness of the extruded part of the material is about 0.5mm, the scoring line and auxiliary scoring will be punched again, and the thickness of the material after the scoring is only 0.15mm to 0.2mm. Tests show that the thickness of the material after the scoring is only between 0.15mm and 0.2mm, which can meet the explosion-proof pressure of 0.9MPA to 1.3MPA. Its mold may include blanking, stretching, stretching and extrusion, stretching and thinning, stretching and extrusion, stretching and thinning, square drawing, square shaping, punching and scoring, and rotary cutting. The basis for controlling the material thickness to only 0.15mm to 0.2mm after notching is that new energy batteries require that the battery shell must be opened explosion-proof when the gas reaches 0.9MPA to 1.3MPA. To this end, through many experiments, we purchased booster pumps, proportional valves, and pressure monitoring, and jointly developed a "residual thickness meter" (to measure the material thickness after notching), processed the clamps of the press mechanism and other devices, and adopted PLC control. After notching, the material thickness is controlled between 0.15mm and 0.2mm, and the bursting pressure can be successfully generated at 0.9MPA to 1.3MPA.
[0055] The utility model can also be used on battery shells or battery covers with aluminum thickness of 0.6 to 1.8 mm. First, the aluminum is extruded twice to compact the shrinkage holes of the partially extruded material to form a denser organizational structure, and the material thickness reaches about 0.4 mm. Then, the scoring line and auxiliary scoring are punched. The thickness of the material after the scoring is only 0.18 mm to 0.22 mm. Tests show that the thickness of the material after the punching scoring is only between 0.18 mm and 0.22 mm, which can meet the explosion-proof pressure of 2.0 ± 0.3 MPa. The basis for controlling the thickness of the material after the scoring to only 0.18 mm to 0.22 mm is that the new energy battery must be opened explosion-proof when the gas in the square shell or the round tube reaches 2.0 ± 0.3 MPa. To this end, through many experiments, we purchased booster pumps, proportional valves, and pressure monitors, and jointly developed a "residual thickness meter" (to measure the thickness of the material after notching). We also processed the clamps of the press mechanism and other devices, and used PLC control. When the thickness of the material after notching is controlled between 0.18mm and 0.22mm, the bursting pressure can be successfully achieved at 2.0±0.3MPa.
[0056] The cost of the processing method of the utility model is less than one tenth of that of imported materials, and batch production can be achieved with only one-time design and mold costs. It is not only low-cost but also simple in processing technology, thus greatly improving production efficiency.
[0057] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. The standard parts used can be purchased from the market, and special-shaped parts can be customized according to the records in the specification and drawings. The specific connection methods of each part adopt mature conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.
[0058] The present invention is not limited to the above-mentioned implementation modes, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be considered as equivalent replacement modes and shall be included in the protection scope of the present invention.
Claims
1. A new energy battery casing with auxiliary notches, comprising a new energy battery casing body (1), wherein the new energy battery casing body (1) is a shell-like structure with a cavity inside, characterized in that: The new energy battery shell body (1) is partially extruded to form an extrusion layer (2), the extrusion layer (2) is punched with a score line (3), auxiliary score lines (4) are respectively arranged on both sides of the score line (3), the auxiliary score lines (4) and the score lines (3) form an outer "mouth"-shaped structure, the score lines (3) are broken after being impacted by the pressure inside the new energy battery shell body (1), and are folded in a direction away from the new energy battery shell body (1) with the auxiliary score lines (4) as folds.
2. The new energy battery housing with auxiliary notches as claimed in claim 1, characterized in that: The new energy battery shell body (1) is made of aluminum or steel, and the new energy battery shell body (1) is in a square box shape or a round tube shape. The extrusion layer (2) is arranged on the bottom surface and / or the top cover of the new energy battery shell body (1).
3. The new energy battery housing with auxiliary notches as claimed in claim 1, characterized in that: The cross section of the scoring line (3) is in the shape of a "I", "W", "H", "C", "U" or "O".
4. The new energy battery housing with auxiliary notches as claimed in claim 1, characterized in that: The score line (3) is composed of an upper score line, a lower score line, and a middle score line connected between the upper score line and the lower score line. The auxiliary score line (4) is arranged between the left end of the upper score line and the left end of the lower score line, and between the right end of the upper score line and the right end of the lower score line. When the score line (3) is broken, the middle score line is torn along the upper score line and the lower score line, and is folded outwards with the auxiliary score line (4) as a fold.
5. The new energy battery housing with auxiliary notches as claimed in claim 1, characterized in that: The scoring line (3) is composed of two rectangular blocks that are symmetrical and connected to each other, or two rectangular blocks that are symmetrical and connected to each other. The scoring line (3) is folded outward with the auxiliary scoring (4) as a fold to form a rectangular bursting hole.
6. The new energy battery housing with auxiliary notches as claimed in claim 1, characterized in that: The auxiliary notch (4) is a discontinuous dotted line notch, and gaps are reserved between the two ends of the auxiliary notch (4) and the notch line (3).
7. The new energy battery housing with auxiliary notches as claimed in claim 1, characterized in that: The surfaces of the scoring line (3) and the auxiliary scoring (4) are both provided with concave-convex patterns, and the concave-convex patterns are a plurality of concave-convex grooves.
8. The new energy battery housing with auxiliary notches as claimed in claim 1, characterized in that: The thickness of the extruded layer (2) is 0.3 mm to 0.6 mm, and the residual thickness of the score line (3) and the auxiliary score (4) is 0.10 mm to 0.22 mm.
9. The new energy battery housing with auxiliary notches as claimed in claim 1, characterized in that: The new energy battery shell body (1) is in the shape of a circular tube, the extrusion layer (2) is arranged on the tube wall and / or the tube cover of the new energy battery shell body (1), and the extrusion layer (2) is evenly distributed along the circumference.