Battery box body and battery

Abstract

The battery box body comprises a box body, an upper cover and a sealing ring, the box body is provided with a containing cavity with an opening facing one side, the peripheral side of the box body is connected with a first turnup edge, and the first turnup edge is turned over in the direction away from the opening; the upper cover is located at the opening of the containing cavity and comprises an upper cover body and a first connecting edge connected to the upper cover body in the circumferential direction, the portion, close to the first connecting edge, of the upper cover body in the circumferential direction is provided with a protection part, and the protection part abuts against a side plate of the box body; the sealing ring is located between the first flanging and the first connecting edge. According to the battery box body disclosed by the utility model, the sealing ring can be separated from the accommodating cavity by the protection part, so that impurities in an external environment are further prevented from entering the accommodating cavity, and meanwhile, when the battery is in thermal runaway, the protection part prevents high-temperature and high-pressure gas from impacting the sealing ring and avoids sealing failure of the sealing ring, so that double-layer protection is provided for the battery, and the service life of the battery is prolonged. And the safety of the battery is further improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery housing and a battery. Background Technology

[0002] In related technologies, the battery casing and cover are directly assembled with the sealing ring by compression. Because the sealing ring has a certain amount of compression, there is a gap between the sealing surface of the cover and the casing. When thermal runaway occurs in the battery, high-temperature and high-pressure gas will pass through this gap, causing the sealing ring to deform and fail, resulting in the failure of the battery casing seal. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this invention is to provide a battery housing in which a protective section separates the sealing ring from the receiving cavity. In the event of thermal runaway of the battery, the protective section prevents the sealing ring from being impacted by high-temperature, high-pressure gases, providing double-layer protection for the battery and thus improving battery safety.

[0004] This utility model also proposes a battery with a battery box.

[0005] According to a first aspect of the present invention, a battery case includes: a case having a receiving cavity with an opening to one side, a first flange connected to the outer periphery of the case, the first flange being folded away from the opening; a top cover located at the opening of the receiving cavity, the top cover including a top cover body and a first connecting edge connected to the circumferential direction of the top cover body, the top cover body having a protective portion in the circumferential direction near the first connecting edge, the protective portion abutting against a side plate of the case; and a sealing ring located between the first flange and the first connecting edge.

[0006] According to the battery housing of this utility model embodiment, the protective part can separate the sealing ring from the receiving cavity, further preventing impurities in the external environment from entering the receiving cavity. At the same time, when the battery experiences thermal runaway, the protective part prevents the sealing ring from being impacted by high-temperature and high-pressure gas, thus preventing the sealing ring from failing and providing double-layer protection for the battery, thereby improving the battery's safety.

[0007] According to some embodiments of the present invention, the protective part is a groove recessed in the upper cover body toward the receiving cavity. The groove has a first sidewall and a second sidewall disposed opposite to each other. The first sidewall is located on the outer periphery of the second sidewall and abuts against the side plate of the box body.

[0008] According to some embodiments of the present invention, the groove further has a bottom wall connected to the bottom of the first side wall and the second side wall, and a first rounded corner is provided between the first side wall and the bottom wall and between the second side wall and the bottom wall.

[0009] According to some embodiments of the present invention, the included angle between the first sidewall and the bottom wall is A, which satisfies: 90°≤A≤120°.

[0010] According to some embodiments of the present invention, the side of the first connecting edge away from the box body is the first side surface, the upper cover body includes a first plate and a second plate connected to the outer periphery of the first plate, the second plate forms the groove, the side of the first plate away from the box body is the second side surface, and the first side surface and the second side surface are coplanar.

[0011] According to some embodiments of this utility model, the height of the groove is Z, which satisfies: 2mm≤Z≤10mm; the minimum width of the groove is Y in the direction from the upper cover body to the first connecting edge, which satisfies: 2mm≤Y≤10mm.

[0012] According to some embodiments of the present invention, a second flange is connected to the first connecting edge in the circumferential direction, and the second flange is folded toward the first flange to abut against the first flange.

[0013] According to some embodiments of the present invention, the included angle between the first connecting edge and the second flange is a right angle; and / or, a second rounded corner is provided between the first connecting edge and the second flange.

[0014] According to some embodiments of the present invention, the battery housing further includes: a fastener, a first mounting hole on the first flange, a second mounting hole opposite to the first mounting hole on the first connecting edge, a third mounting hole opposite to the first mounting hole on the sealing ring, and the fastener passing through the first mounting hole, the second mounting hole and the third mounting hole to fix the top cover to the housing.

[0015] The battery according to a second aspect of the present invention includes: a battery housing according to the first aspect of the present invention described above.

[0016] According to the battery embodiment of this utility model, by setting the battery housing as described above, the protective part avoids the impact of high temperature and high pressure gas on the sealing ring, avoids the sealing ring from failing, provides double protection for the battery, and thus improves the safety of the battery.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of a battery according to an embodiment of the present utility model;

[0020] Figure 2 yes Figure 1 Top view of the battery;

[0021] Figure 3 yes Figure 2 Sectional view along line AA;

[0022] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0023] Figure 5 yes Figure 1 A schematic diagram of the upper and middle covers;

[0024] Figure 6 yes Figure 1 Top view of the upper and middle covers;

[0025] Figure 7 yes Figure 6 A cross-sectional view along the CC line;

[0026] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0027] Figure label:

[0028] 100. Battery; 101. Battery cell;

[0029] 10. Battery housing;

[0030] 1. Housing; 11. Receiving cavity; 12. First flange; 121. First mounting hole; 13. Side panel;

[0031] 2. Top cover; 21. Top cover body; 211. First plate; 2111. Second side; 212. Second plate; 213. Protective part; 214. Groove; 2141. First side wall; 2142. Second side wall; 2143. Bottom wall; 22. First connecting edge; 221. First side; 222. Second mounting hole; 23. Second flange;

[0032] 3. Sealing ring; 31. Third mounting hole. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The following is for reference. Figures 1-8 The battery housing 10 according to an embodiment of the present utility model is described.

[0037] According to the first aspect of the present invention, the battery housing 10 includes a housing 1 and a top cover 2. The housing 1 has a receiving cavity 11 with an opening to one side. A battery cell 101 is placed in the receiving cavity 11. The top cover 2 is located at the opening of the receiving cavity 11 and is used to close the opening of the receiving cavity 11. The housing 1 and the top cover 2 can be used to protect the battery cell 101 and prevent the battery cell 101 from being impacted by the external environment.

[0038] A first flange 12 is connected to the outer periphery of the box body 1, that is, a first flange 12 is connected to the opening of the box body 1. The first flange 12 is folded away from the opening, that is, the first flange 12 is set at an angle with the side plate 13 of the box body 1. The angle between the first flange 12 and the side plate 13 can be an acute angle, a right angle or an obtuse angle. Preferably, the angle between the first flange 12 and the side plate 13 is a right angle. The upper cover 2 includes an upper cover body 21 and a first connecting edge 22. The first connecting edge 22 is connected to the circumference of the upper cover body 21. The upper cover body 21 has a protective part 213 near the first connecting edge 22 in the circumference. The protective part 213 abuts against the side plate 13 of the box body 1. The box body 1 has four side plates 13, which are connected end to end in sequence. The first flange 12 is connected to the upper end of the four side plates 13.

[0039] The battery housing 10 also includes a sealing ring 3, which is located between the first flange 12 and the first connecting edge 22. The sealing ring 3 is used to seal the gap between the first flange 12 and the first connecting edge 22, thereby sealing the gap between the top cover 2 and the housing 1, preventing impurities in the external environment from entering the receiving cavity 11. When the battery 100 experiences thermal runaway, the sealing ring 3 can control the thermal runaway within the receiving cavity 11, preventing the spread of thermal runaway.

[0040] For example, the protective part 213 can be a limiting block provided on the side of the upper cover body 21 near the receiving cavity 11. The limiting block abuts against the side plate 13 of the box body 1 to isolate the sealing ring 3 from the receiving cavity 11.

[0041] The protective part 213 can separate the sealing ring 3 from the receiving cavity 11, further preventing impurities from the external environment from entering the receiving cavity 11. At the same time, when the battery 100 experiences thermal runaway, the protective part 213 can effectively protect the high temperature and high pressure gas generated by the internal thermal runaway from directly impacting the protective part 213, avoiding impact on the sealing ring 3 and preventing sealing failure. It can also prevent the flame from directly burning the sealing ring 3, providing double protection for the battery 100 and thus improving the safety of the battery 100.

[0042] According to the battery housing 10 of this utility model embodiment, the protective part 213 can separate the sealing ring 3 from the receiving cavity 11, further preventing impurities in the external environment from entering the receiving cavity 11. At the same time, when the battery 100 experiences thermal runaway, the protective part 213 prevents the sealing ring 3 from being impacted by high temperature and high pressure gas, preventing the sealing ring 3 from failing to seal, providing double protection for the battery 100, thereby improving the safety of the battery 100.

[0043] According to some embodiments of this utility model, refer to Figures 1-8The protective part 213 is a groove 214 recessed in the upper cover body 21 toward the receiving cavity 11. The groove 214 has a first side wall 2141 and a second side wall 2142 arranged opposite to each other. The first side wall 2141 is located on the outer periphery of the second side wall 2142 (the outer periphery is the side of the first side wall 2141 away from the center of the upper cover body 21). The first side wall 2141 abuts against the side plate 13 of the box body 1.

[0044] The groove 214 can also increase the structural strength of the top cover 2. The groove 214 is evenly distributed along the periphery of the top cover 2. When the top cover 2 is installed at the opening of the box 1, the first side wall 2141 of the groove 214 can abut against the side plate 13 of the box 1. The groove 214 can not only increase the structural strength of the top cover 2, but also separate the sealing ring 3 from the receiving cavity 11.

[0045] According to some embodiments of this utility model, refer to Figure 4 , Figure 8 The groove 214 also has a bottom wall 2143 connected to the bottom of the first side wall 2141 and the second side wall 2142. The first side wall 2141 and the second side wall 2142 are provided with a first rounded corner between the bottom wall 2143 and the first side wall 2141 and the second side wall 2142. When stamping the groove 214, the first rounded corner is provided between the first side wall 2141 and the second side wall 2142 and the bottom wall 2143, which can avoid stress concentration at the connection between the first side wall 2141 and the bottom wall 2143 and the connection between the second side wall 2142 and the bottom wall 2143. In addition, the design of the first rounded corner can also prevent the installer from scratching himself when installing the top cover 2.

[0046] According to some embodiments of this utility model, refer to Figure 4 , Figure 8 The included angle between the first sidewall 2141 and the bottom wall 2143 is A, satisfying 90°≤A≤120°. This allows the first sidewall 2141 to better abut against the side plate 13 and facilitates the stamping of the groove 214 on the upper cover body 21. If the inclination angle of the first sidewall 2141 is too large, the first sidewall 2141 will occupy too much space for the sealing ring 3. For example, the included angle between the first sidewall 2141 and the bottom wall 2143 can be 90°, 105°, 110°, or 120°, etc. Preferably, the included angle between the first sidewall 2141 and the bottom wall 2143 can be 90°.

[0047] In a specific example, the included angle between the second sidewall 2142 and the bottom wall 2143 is also A, satisfying: 90°≤A≤120°. The included angle between the second sidewall 2142 and the bottom wall 2143 can be 90°, 105°, 110° or 120°, etc. Preferably, the included angle between the second sidewall 2142 and the bottom wall 2143 can be 90°.

[0048] According to some embodiments of this utility model, refer to Figures 1-8 The side of the first connecting edge 22 facing away from the box body 1 is the first side surface 221. The upper cover body 21 includes a first plate 211 and a second plate 212. The second plate 212 is connected to the outer periphery of the first plate 211 and forms a groove 214. The side of the first plate 211 facing away from the box body 1 is the second side surface 2111. The first side surface 221 and the second side surface 2111 are coplanar, that is, the first connecting edge 22 and the upper cover body 21 are a flat plate. The groove 214 can be directly punched out at the edge of the upper cover body 21, which simplifies the processing of the groove 214.

[0049] According to some embodiments of this utility model, refer to Figure 4 , Figure 8 The height of the groove 214 is Z, which satisfies: 2mm≤Z≤10mm. This ensures that the first sidewall 2141 of the groove 214 can abut against the side plate 13, and also avoids the groove 214 occupying too much space in the receiving cavity 11. For example, the height of the groove 214 can be 2mm, 5mm, 7mm or 10mm, etc.

[0050] In the direction from the upper cover body 21 to the first connecting edge 22, the minimum width of the groove 214 is Y, which satisfies: 2mm≤Y≤10mm. This facilitates the processing and forming of the groove 214 and also increases the structural strength of the upper cover 2. For example, the minimum width of the groove 214 can be 2mm, 5mm, 7mm, or 10mm, etc.

[0051] According to some embodiments of this utility model, refer to Figures 1-8 A second flange 23 is connected circumferentially to the first connecting edge 22. The second flange 23 is folded towards the first flange 12 to abut against it, thus sealing the sealing ring 3 between the first flange 12 and the first connecting edge 22. This prevents the sealing ring 3 from detaching from the first flange 12 and the first connecting edge 22 from the side facing away from the protective part 213. Under the combined constraints of the protective part 213, the first flange 12, the first connecting edge 22, and the second flange 23, a sealed cavity is defined, sealing the sealing ring 3 within this cavity and preventing impurities in the external environment from damaging the sealing ring 3.

[0052] According to some embodiments of this utility model, refer to Figure 4 , Figure 8 The angle between the first connecting edge 22 and the second flange 23 is a right angle. The side of the second flange 23 can be perpendicular to the first flange 12, which allows the second flange 23 to better abut against the first flange 12.

[0053] A second rounded corner is provided between the first connecting edge 22 and the second flange 23. The setting of the second rounded corner can avoid stress concentration at the connection between the first connecting edge 22 and the second flange 23. In addition, the design of the second rounded corner can also prevent installers from scratching themselves when installing the cover 2.

[0054] According to some embodiments of this utility model, refer to Figures 1-3 The battery housing 10 also includes fasteners. The first flange 12 has a first mounting hole 121, the first connecting edge 22 has a second mounting hole 222 opposite to the first mounting hole 121, and the sealing ring 3 has a third mounting hole 31 opposite to the first mounting hole 121. The fasteners are sequentially inserted through the first mounting hole 121, the third mounting hole 31, and the second mounting hole 222 to fix the upper cover 2 to the housing 1. This makes fixing the upper cover 2 to the housing 1 simple and easy. The third mounting hole 31 on the sealing ring 3 allows the fasteners to seal the sealing ring 3 between the first flange 12 and the first connecting edge 22, preventing displacement of the sealing ring 3 between them.

[0055] Multiple first mounting holes 121 are provided, and the multiple first mounting holes 121 are arranged at intervals along the circumference of the first flange 12. Multiple second mounting holes 222 are provided, and the multiple second mounting holes 222 are arranged at intervals along the circumference of the first connecting edge 22. Multiple third mounting holes 31 are provided, and the multiple third mounting holes 31 are arranged at intervals along the circumference of the sealing ring 3. The number of first mounting holes 121, second mounting holes 222 and third mounting holes 31 are equal and correspond one-to-one. The multiple spaced first mounting holes 121, second mounting holes 222 and third mounting holes 31 can increase the structural strength of the upper cover 2 fixed to the box body 1.

[0056] The battery 100 according to a second aspect embodiment of the present invention includes: a battery housing 10 according to the first aspect embodiment of the present invention.

[0057] According to the embodiment of the present utility model, the battery 100, by setting the battery housing 10, when the battery 100 experiences thermal runaway, the protective part 213 can avoid the impact of high temperature and high pressure gas on the sealing ring 3, avoid the sealing ring 3 from failing, provide double protection for the battery 100, and thus improve the safety of the battery 100.

[0058] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery housing, characterized in that, include: The box has a receiving cavity that opens to one side, and a first flange is connected to the outer periphery of the box, the first flange being folded in a direction away from the opening; The top cover is located at the opening of the receiving cavity. The top cover includes a top cover body and a first connecting edge connected to the top cover body in the circumferential direction. The top cover body has a protective part in the circumferential direction near the first connecting edge. The protective part abuts against the side plate of the box. A sealing ring is located between the first flange and the first connecting edge.

2. The battery housing according to claim 1, characterized in that, The protective part is a groove recessed in the upper cover body toward the receiving cavity. The groove has a first sidewall and a second sidewall disposed opposite to each other. The first sidewall is located on the outer periphery of the second sidewall and abuts against the side plate of the box body.

3. The battery housing according to claim 2, characterized in that, The groove also has a bottom wall connected to the bottom of the first side wall and the second side wall, and a first rounded corner is provided between the first side wall and the bottom wall and between the second side wall and the bottom wall.

4. The battery housing according to claim 3, characterized in that, The angle between the first sidewall and the bottom wall is A, which satisfies: 90°≤A≤120°.

5. The battery housing according to claim 2, characterized in that, The side of the first connecting edge that is away from the box body is the first side surface. The upper cover body includes a first plate and a second plate connected to the outer periphery of the first plate. The second plate forms the groove. The side of the first plate that is away from the box body is the second side surface. The first side surface and the second side surface are coplanar.

6. The battery housing according to claim 2, characterized in that, The height of the groove is Z, which satisfies: 2mm≤Z≤10mm; the minimum width of the groove is Y in the direction from the upper cover body to the first connecting edge, which satisfies: 2mm≤Y≤10mm.

7. The battery housing according to claim 1, characterized in that, The first connecting edge is connected to a second flange in the circumferential direction. The second flange is folded towards the first flange so as to abut against the first flange.

8. The battery housing according to claim 7, characterized in that, The angle between the first connecting edge and the second flange is a right angle; and / or, a second rounded corner is provided between the first connecting edge and the second flange.

9. The battery housing according to claim 1, characterized in that, Also includes: The fastener has a first mounting hole on the first flange, a second mounting hole on the first connecting edge opposite to the first mounting hole, and a third mounting hole on the sealing ring opposite to the first mounting hole. The fastener passes through the first mounting hole, the second mounting hole, and the third mounting hole to fix the top cover to the housing.

10. A battery, characterized in that, include: The battery housing according to any one of claims 1-9.

Images