CN216980702U - Explosion-proof housing and battery with explosion-proof housing - Google Patents
Explosion-proof housing and battery with explosion-proof housing Download PDFInfo
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- CN216980702U CN216980702U CN202220437574.5U CN202220437574U CN216980702U CN 216980702 U CN216980702 U CN 216980702U CN 202220437574 U CN202220437574 U CN 202220437574U CN 216980702 U CN216980702 U CN 216980702U
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Abstract
The utility model relates to the technical field of batteries, in particular to an explosion-proof shell and a battery with the same, comprising: the shell body is of a double-layer composite structure, the double-layer composite structure comprises an inner layer and an outer layer, and the inner layer and the outer layer are tightly pressed; the outer layer of the surface of one side of the shell body is provided with an anti-explosion groove, the anti-explosion groove is annular, the depth h of the anti-explosion groove is equal to the thickness of the outer layer, the bottom of the anti-explosion groove is provided with an opening, and the surface of the inner layer is partially exposed out of the opening; the pressure of normal work in the shell body is set to be pressure P, if the pressure in the shell body is larger than the pressure P, the inner layer is extruded and deformed to generate cracks, and the cracks are communicated with the openings. The utility model provides an explosion-proof shell and a battery with the same.
Description
Technical Field
The utility model relates to the technical field of batteries, in particular to an explosion-proof shell and a battery with the same.
Background
Batteries on the current market are generally provided with explosion-proof structures to ensure that the batteries can be timely decompressed when the internal air pressure excessively rises in the long-term use process or the thermal runaway process in order to avoid internal manufacturing defects or internal thermal runaway under the condition of user abuse, so that the explosion of the batteries is prevented, and the personal and property safety is protected.
Currently, typical explosion-proof valve designs can be divided into two categories: one is a laminated explosion-proof pressure relief structure, generally apply to the design of the cover plate of the cylindrical lithium ion battery, generally have cutoff, pressure relief function at the same time, but the structural defect of this kind is that the structure is complicated, the assembly of more parts is complicated, the space usage is great; the other type is an engraving type explosion-proof pressure relief structure, the structure has very high requirement on the manufacturing precision of the engraving, and is only suitable for engraving in metal with low hardness and good ductility, such as aluminum alloy and the like, and the engraving is difficult to form on the material with high hardness, the processing manufacturability is poor, the thin-wall part is easy to deform by extrusion, and the explosion-proof pressure is difficult to control accurately due to the fact that the engraving is performed on the iron alloy with high hardness.
In the prior art, due to size limitation, the traditional laminated explosion-proof structure occupies a large space and is difficult to arrange in a miniature battery; in addition, the micro-battery generally adopts iron-based alloy with high strength as a shell or a cover plate base material, the grooving of the material has no economical and reliable manufacturing method, and due to the limitation of the use environment, sufficient deformation space cannot be provided to realize the explosion-proof pressure relief function.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the stacked explosion-proof structure aims to solve the problems that the traditional stacked explosion-proof structure occupies a large space and is difficult to arrange in a miniature battery; the utility model provides an explosion-proof shell and a battery with the explosion-proof shell, wherein the explosion-proof shell is simple to manufacture, does not need to increase extra structural space, has simple manufacturing process, low maintenance cost and high safety performance, and has the explosion-proof pressure relief function.
The technical scheme adopted by the utility model for solving the technical problems is as follows: an explosion proof enclosure comprising: the shell body is of a double-layer composite structure, the double-layer composite structure comprises an inner layer and an outer layer, and the inner layer and the outer layer are tightly pressed; an outer layer of the surface of one side of the shell body is provided with an explosion-proof groove, the explosion-proof groove extends along the circumferential direction of the shell body, the explosion-proof groove is annular, the depth h of the explosion-proof groove is equal to the thickness of the outer layer, the bottom of the explosion-proof groove is provided with an opening, and the surface of the inner layer is partially exposed out of the opening; setting the pressure of normal work in the shell body as pressure P, and if the pressure in the shell body is greater than the pressure P, the inner layer is extruded and deformed to generate cracks, and the cracks are communicated with the openings. This explosion-proof shell simple manufacture need not to increase extra structure space, has explosion-proof pressure release function, has ensured the effective space of shell, and explosion-proof shell is double-deck composite construction, and sets up explosion-proof groove in the outer layer, has guaranteed the safety of pressure release, and the security performance is high.
Further, specifically, in order to protect the explosion-proof groove and improve the safety performance, a first weakening portion and a second weakening portion are further arranged on the outer layer of one side surface of the shell body, the first weakening portion and the second weakening portion extend along the circumferential direction of the shell body, the first weakening portion and the second weakening portion are both annular, and the first weakening portion surrounds the second weakening portion; the explosion proof groove is disposed between the first and second weakened portions.
Preferably, for precise control of the machining and ease of machining, the explosion-proof groove is located at an intermediate position between the first and second weakened portions.
Further, specifically, for convenience of manufacture and guarantee of an explosion-proof effect, the cross section of the explosion-proof groove is in a tapered shape, and the size of the cross section of the explosion-proof groove gradually decreases from the outer layer to the inner layer.
Further, in particular, the depth of the first weakened portion is the same as the depth of the second weakened portion, and the thickness of the first weakened portion is smaller than that of the outer layer and larger than that of the inner layer.
Further, in order to ensure the mechanical property, the inner layer has good electrical conductivity and thermal conductivity, the outer layer has good corrosion resistance and wear resistance, and grooving is facilitated, the inner layer is a copper layer, and the outer layer is a stainless steel layer.
Preferably, in order to facilitate manufacturing and improve manufacturing efficiency, the first weakening portion, the second weakening portion, and the explosion-proof groove are all disposed at a bottom of the housing body.
A battery having an explosion proof housing comprising an explosion proof housing as described above.
The utility model has the beneficial effects that:
(1) the explosion-proof shell is simple to manufacture, does not need to increase extra structural space, has an explosion-proof pressure relief function, and ensures the effective space of the shell;
(2) the explosion-proof shell is of a double-layer composite structure, the explosion-proof groove is formed in the outer layer, the safety of pressure relief is guaranteed, the safety performance is high, and the safety is further improved through further improvement;
(3) the explosion-proof shell has the advantages of simple manufacturing process, low maintenance cost and convenience for automatic production.
Drawings
The utility model is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of embodiment 1 of the present invention.
Fig. 2 is a sectional view of embodiment 1 of the present invention.
Fig. 3 is a partially enlarged view of a in example 1 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 5 is a sectional view of embodiment 2 of the present invention.
Fig. 6 is a partially enlarged view of B of embodiment 2 of the present invention.
FIG. 7 is a flowchart of a method of making an embodiment of the utility model.
In fig. 1, a housing body; 11. an inner layer; 12. an outer layer; 2. an explosion-proof groove; 3. a first weakened portion; 4. a second weakened portion.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1 to 3, which are first embodiments of the present invention, an explosion-proof enclosure includes: the shell comprises a shell body 1, wherein the shell body 1 is of a double-layer composite structure, the double-layer composite structure comprises an inner layer 11 and an outer layer 12, and the inner layer 11 and the outer layer 12 are tightly pressed; an outer layer 12 on the surface of one side of the shell body 1 is provided with an anti-explosion groove 2, the anti-explosion groove 2 extends along the circumferential direction of the shell body 1, the anti-explosion groove 2 is annular, the depth h of the anti-explosion groove 2 is equal to the thickness of the outer layer 12, the bottom of the anti-explosion groove 2 is provided with an opening, and the surface of the inner layer 11 is partially exposed out of the opening; the pressure of normal work in the shell body 1 is set to be pressure P, and if the pressure in the shell body 1 is greater than the pressure P, the inner layer 11 is extruded and deformed to generate cracks, and the cracks are communicated with the openings. This explosion-proof housing simple manufacture need not to increase extra structure space, has explosion-proof pressure release function, has ensured the effective space of shell, and explosion-proof housing is double-deck composite construction, and sets up explosion-proof groove in the skin, has guaranteed the safety of pressure release, and the security performance is high.
The cross-section of the anti-explosion groove 2 forms a taper shape with the size gradually reduced from the outer layer 12 to the inner layer 11, and the tapered structure is arranged, so that the processing process is simple, the anti-explosion effect is effectively guaranteed, and the safety of the anti-explosion shell is further guaranteed. The inner layer 11 is a copper layer, the outer layer 12 is a stainless steel layer, the shell body 1 is suitable for manufacturing and using, the copper layer and the stainless steel layer are tightly combined, and the mechanical performance is good. The explosion-proof groove 2 is arranged at the bottom of the shell body 1. Because the bottom of the explosion-proof shell is a plane, the explosion-proof shell is convenient to manufacture, and the manufacturing efficiency is improved.
As shown in fig. 7, an explosion-proof enclosure manufacturing method is used for manufacturing the explosion-proof enclosure, and the manufacturing method comprises the following steps:
s1: choose preliminary fashioned casing body 1, preliminary fashioned casing body 1 is double-deck composite construction, and double-deck composite construction includes inlayer 11 and skin 12, and inlayer 11 and the inseparable pressfitting of skin 12.
S2: an anti-explosion groove 2 is formed in the outer layer 12 on the surface of one side of the shell body 1, the anti-explosion groove 2 extends along the circumferential direction of the shell body 1, the anti-explosion groove 2 is annular, the depth h of the anti-explosion groove 2 is equal to the thickness of the outer layer 12, an opening is formed in the bottom of the anti-explosion groove 2, and the surface of the inner layer 11 is partially exposed out of the opening;
the specific process of the manufacturing method of the explosion-proof shell according to the first embodiment of the utility model can be as follows:
(1) choose preliminary fashioned casing body 1, preliminary fashioned casing body 1 is double-deck composite construction, and double-deck composite construction includes inlayer 11 and skin 12, and inlayer 11 and the inseparable pressfitting of skin 12. The inner layer 11 is a copper layer, and the outer layer 12 is a stainless steel layer;
the copper layer has good electrical conductivity, thermal conductivity and ductility, but the copper layer has insufficient strength after being stretched, is easy to deform, has low surface hardness, is easy to generate scratches to influence the surface appearance, and is relatively expensive; the stainless steel layer has good corrosion resistance, wear resistance, diamagnetism and strong decorativeness, but has disadvantages of poor thermal conductivity and increased heat loss compared to the copper layer. The double-layer composite structure has the advantages of good electrical conductivity, thermal conductivity, ductility and the like of the copper layer, corrosion resistance, wear resistance, strong decoration and the like of the stainless steel layer, is suitable for manufacturing and using the shell body 1, and is tight in combination of the copper layer and the stainless steel layer and good in mechanical property.
(2) Offer explosion-proof groove 2, explosion-proof groove 2 has been offered through laser etching at one side surface outer 12 of casing body 1, explosion-proof groove 2 is the annular, the degree of depth h in explosion-proof groove 2 equals outer 12 thickness, the bottom in explosion-proof groove 2 is provided with the opening, the surface part of inlayer 11 exposes in the opening, in other words, form explosion-proof groove through outer complete laser etching, and keep the inlayer, the surface of inlayer can partially expose, laser etching's influence factor includes laser power, the number of times of ablation, ablation speed, packing density, the laser type.
The working principle is as follows: when the battery is normally used, the pressure of normal work in the shell body 1 is pressure P, the inner layer 11 of the shell body 1 is mainly used for structural connection and sealing, and the outer layer 12 provided with the explosion-proof groove 2 is used for secondary structural connection and sealing. When the battery is used very much, the pressure inside the battery is greater than the pressure P, the sealing performance of the inner layer 11 is damaged, the bottom of the explosion-proof groove 2 is provided with the opening, the surface part of the inner layer 11 is exposed out of the opening, the inner layer 11 is subjected to extrusion deformation to generate cracks, the cracks are communicated with the opening, the cracks of the inner layer 11, the opening and the explosion-proof groove 2 form an exhaust channel, the internal air pressure of the battery is released from the exhaust channel, the explosion of the battery is avoided, the inner layer 11 only can form cracks, the inner layer cannot fall off from the outer layer, the explosion and the splashing of a winding core inside the battery are prevented, and the safety of the battery is improved.
Example 2
As shown in fig. 4 to 6, a second embodiment of the present invention is different from the first embodiment in that a first weakened portion 3 and a second weakened portion 4 are further provided on the outer layer 12 on one side surface of the housing body 1, the first weakened portion 3 and the second weakened portion 4 both extend along the circumferential direction of the housing body 1, the first weakened portion 3 and the second weakened portion 4 are both annular, and the first weakened portion 3 surrounds the second weakened portion 4; the explosion-proof groove 2 is provided between the first weakened portion 3 and the second weakened portion 4. The explosion-proof groove 2 is directly exposed outside and is easily damaged and deformed by collision, extrusion and the like in the processes of production, transportation and use. Through hiding explosion-proof groove 2 between first weakening portion 3 and second weakening portion 4, collision or extrusion production damage in avoiding spare part processing, assembly and the finished product normal use process have fine guard action to explosion-proof groove 2 for explosion-proof shell's security performance improves by a wide margin.
The explosion-proof groove 2 is located at the middle position between the first weakening part 3 and the second weakening part 4, so that the processing parameters can be accurately controlled, the processing is more convenient, and the explosion-proof effect of the manufactured explosion-proof shell is better.
The depth of the first weakened portion 3 is the same as the depth of the second weakened portion 4 and is less than the thickness of the outer layer 12 and greater than the thickness of the inner layer 11. First weakening portion 3 and second weakening portion 4 are transition region by big diminishing for joint strength when being connected between inlayer 11 and the skin 12, and when the inside pressure grow of casing, transition region's joint strength diminishes gradually, and transition region's connection can not the sudden change, can compromise the skin and have higher joint strength, also can guarantee that explosion-proof groove has lower exercise level intensity. The first weakened portion 3, the second weakened portion 4 and the explosion-proof groove 2 are all disposed at the bottom of the case body 1. Because the bottom of the explosion-proof shell is a plane, the explosion-proof shell is convenient to manufacture, and the manufacturing efficiency is improved.
The manufacturing method of the explosion-proof shell of the second manufacturing embodiment comprises the following steps:
s1: selecting a preliminarily formed shell body 1, wherein the preliminarily formed shell body 1 is of a double-layer composite structure, the double-layer composite structure comprises an inner layer 11 and an outer layer 12, and the inner layer 11 and the outer layer 12 are tightly pressed.
S2: form first weakening portion 3 and second weakening portion 4 through the outer 12 attenuate of a side surface at casing body 1, first weakening portion 3 and second weakening portion 4 are all along extending casing body 1 circumference, first weakening portion 3 and second weakening portion 4 are the annular, first weakening portion 3 surrounds second weakening portion 4, explosion-proof groove 2 has been seted up between first weakening portion 3 and second weakening portion 4, explosion-proof groove 2 is the annular, the degree of depth h of explosion-proof groove 2 equals the thickness of outer 12, the bottom of explosion-proof groove 2 is provided with the opening, the surface part of inlayer 11 exposes in the opening.
The specific process of the manufacturing method of the explosion-proof shell according to the second embodiment of the utility model can be as follows:
(1) choose preliminary fashioned casing body 1, preliminary fashioned casing body 1 is double-deck composite construction, and double-deck composite construction includes inlayer 11 and skin 12, and inlayer 11 and the inseparable pressfitting of skin 12. The inner layer 11 is a copper layer, and the outer layer 12 is a stainless steel layer;
(2) the first weakened portion 3 and the second weakened portion 4 are formed in a molding mode, the outer layer 12 on one side surface of the shell body 1 is thinned through laser ablation to form the first weakened portion 3 and the second weakened portion 4, the first weakened portion 3 and the second weakened portion 4 extend along the circumferential direction of the shell body 1, the first weakened portion 3 and the second weakened portion 4 are both annular, and the first weakened portion 3 surrounds the second weakened portion 4;
(3) and an explosion-proof groove 2 is formed, the explosion-proof groove 2 is formed between the formed first weakened portion 3 and the formed second weakened portion 4 through laser etching, the explosion-proof groove 2 is annular, the depth h of the explosion-proof groove 2 is equal to the thickness of the outer layer 12, an opening is formed in the bottom of the explosion-proof groove 2, and the surface part of the inner layer 11 is exposed out of the opening.
Therefore, the manufacturing method of the explosion-proof shell according to the second embodiment of the utility model is different from the manufacturing method of the explosion-proof shell according to the first embodiment in that the first weakened part 3 and the second weakened part 4 are formed on the shell body 1 by performing laser burning and thinning treatment on the region where the explosion-proof groove 2 needs to be manufactured, the explosion-proof groove 2 is formed between the first weakened part 3 and the second weakened part 4 through laser etching, and the explosion-proof groove 2 is hidden in the first weakened part 3 and the second weakened part 4 through laser etching, so that the damage caused by collision or extrusion in the processes of part processing, assembly and normal use of a finished product is avoided, the explosion-proof shell has a good protection effect on the explosion-proof groove 2, and the safety performance of the explosion-proof shell is greatly improved.
It should be noted that the shapes of the first weakened portion 3, the second weakened portion 4 and the explosion-proof slot 2 may be reasonably adjusted according to the specific structure of the explosion-proof housing, so as to meet the explosion-proof requirement of the explosion-proof housing and ensure that the processing method is easy to implement, such as an elliptical ring shape. In the second embodiment of the present invention, the first weakened portion 3, the second weakened portion 4 and the explosion-proof groove 2 are all annular, and the cross sections of the first weakened portion 3 and the second weakened portion 4 are all rectangular, in the second embodiment of the present invention, the first weakened portion 3, the second weakened portion 4 and the explosion-proof groove 2 are all disposed at the bottom of the housing body 1, that is, the bottom of the housing body 1 is thinned by laser ablation to form the first weakened portion 3 and the second weakened portion 4, and then the explosion-proof groove 2 is formed between the formed first weakened portion 3 and the formed second weakened portion 4 by laser etching.
The explosion-proof groove 2 is located at an intermediate position between the first weakened portion 3 and the second weakened portion 4. The processing parameters can be accurately controlled, the processing is more convenient, and the explosion-proof shell which is manufactured has better explosion-proof effect.
The depth of the first weakened section 3 is the same as the depth of the second weakened section 4 and the thickness of the first weakened section is less than the outer layer 12 and greater than the inner layer 11.
The working principle is as follows: when the battery is normally used, the pressure of normal work in the shell body 1 is pressure P, the inner layer 11 of the shell body 1 is mainly used for structural connection and sealing, and the outer layer 12 provided with the first weakened portion 3, the second weakened portion 4 and the explosion-proof groove 2 is used for secondary structural connection and sealing. When the battery is used very much, the pressure inside the battery is greater than the pressure P, the sealability of the inner layer 11 is deteriorated, because the bottom of the explosion-proof groove 2 is provided with an opening, the surface part of the inner layer 11 is exposed out of the opening, the inner layer 11 is extruded and deformed to generate cracks, and the cracks are communicated with the openings, the cracks and the openings of the inner layer 11 and the explosion-proof groove 2 form an exhaust channel, the internal air pressure of the battery is released from the exhaust channel, the explosion of the battery is avoided, and the inner layer 11 only forms cracks, the inner layer can not fall off from the outer layer, the coiled core in the battery is prevented from being exploded and splashed, the safety of the battery is improved, meanwhile, the depth of the first weakened area is the same as that of the second weakened area, the thickness of the first weakened area is smaller than that of the outer layer 12 and is larger than that of the copper layer, the first weakened area and the second weakened area are partially connected with the outer layer 12, the explosion-proof groove 2 is prevented from being separated from the outer layer 12, and the safety of the battery during pressure relief is further guaranteed.
A battery having an explosion proof housing comprising an explosion proof housing as described above.
The explosion-proof shell is simple to manufacture, does not need to increase extra structural space, has an explosion-proof pressure relief function, and ensures the effective space of the shell; the explosion-proof shell is of a double-layer composite structure, the explosion-proof groove 2 is formed in the outer layer 12, the safety of pressure relief is guaranteed, the safety performance is high, and the safety is further improved through further improvement; and the manufacturing process is simple, the maintenance cost is low, and the automatic production is convenient.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. An explosion proof enclosure characterized by: the method comprises the following steps:
the shell body (1), the shell body (1) is of a double-layer composite structure, the double-layer composite structure comprises an inner layer (11) and an outer layer (12), and the inner layer (11) and the outer layer (12) are tightly pressed;
an outer layer (12) of the surface of one side of the shell body (1) is provided with an explosion-proof groove (2), the explosion-proof groove (2) extends along the circumferential direction of the shell body (1), the explosion-proof groove (2) is annular, the depth h of the explosion-proof groove (2) is equal to the thickness of the outer layer (12), the bottom of the explosion-proof groove (2) is provided with an opening, and the surface of the inner layer (11) is partially exposed out of the opening;
setting the normal working pressure in the shell body (1) as pressure P, and if the pressure in the shell body (1) is greater than the pressure P, the inner layer (11) is extruded and deformed to generate cracks, and the cracks are communicated with the openings.
2. An explosion proof enclosure as set forth in claim 1 in which: a first weakened portion (3) and a second weakened portion (4) are further arranged on the outer layer (12) of one side surface of the shell body (1), the first weakened portion (3) and the second weakened portion (4) extend along the circumferential direction of the shell body (1), the first weakened portion (3) and the second weakened portion (4) are annular, and the first weakened portion (3) surrounds the second weakened portion (4);
the explosion-proof groove (2) is arranged between the first weakening part (3) and the second weakening part (4).
3. An explosion proof enclosure as set forth in claim 2 in which: the explosion-proof groove (2) is located at the middle position between the first weakening part (3) and the second weakening part (4).
4. An explosion proof enclosure as set forth in claim 1, wherein: the cross section of the explosion-proof groove (2) is formed into a taper shape, the size of which is gradually reduced from the outer layer (12) to the inner layer (11).
5. An explosion proof enclosure as set forth in claim 2 in which: the depth of the first weakened portion (3) is the same as the depth of the second weakened portion (4), and the thickness of the first weakened portion is smaller than that of the outer layer (12) and larger than that of the inner layer (11).
6. An explosion proof enclosure as set forth in claim 1 in which: the inner layer (11) is a copper layer, and the outer layer (12) is a stainless steel layer.
7. An explosion proof enclosure as set forth in claim 2 in which: the first weakening portion (3), the second weakening portion (4) and the explosion-proof groove (2) are arranged at the bottom of the shell body (1).
8. A battery having an explosion-proof housing, characterized by: comprising an explosion proof enclosure according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220437574.5U CN216980702U (en) | 2022-03-02 | 2022-03-02 | Explosion-proof housing and battery with explosion-proof housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220437574.5U CN216980702U (en) | 2022-03-02 | 2022-03-02 | Explosion-proof housing and battery with explosion-proof housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216980702U true CN216980702U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220437574.5U Active CN216980702U (en) | 2022-03-02 | 2022-03-02 | Explosion-proof housing and battery with explosion-proof housing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216980702U (en) |
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2022
- 2022-03-02 CN CN202220437574.5U patent/CN216980702U/en active Active
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