Battery shell structure and battery with same

Abstract

The utility model discloses a battery shell structure and a battery with the same. The battery shell structure comprises a shell body, an end plate and a vent plate, the shell body is provided with an opening facing one end, and an anti-explosion valve is arranged on the first side wall of the shell. The end plate covers the opening; the ventilation plate is installed on the inner side of the first side wall, an exhaust channel communicated with the anti-explosion valve is formed in the ventilation plate, and a limiting structure is arranged in the shell body and used for limiting the ventilation plate between the limiting structure and the first side wall. The vent plate is mounted in the battery shell through the limiting structure, so that the mounting firmness of the vent plate can be effectively ensured to ensure the smoothness of an exhaust passage, the vent plate can be more conveniently and quickly mounted, meanwhile, the overall production cost of the battery is effectively reduced, and the selectivity of the material of the vent plate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery shell structure and a battery having the same. Background Art

[0002] In the prior art, the internal pressure relief and exhaust channels of long battery cells are generally designed on the vent plates, and the vent plates are mostly installed by hot-melt connection with the electrode groups in the battery, or by bonding with the electrode groups in the battery. The above two vent plate installation methods have the problems of limiting the material selection of the vent plates, unstable assembly, and deformation of the vent plates during installation. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery housing structure, the installation of the ventilation plate of which is stable and reliable, and the material selection of the ventilation plate is diverse.

[0004] According to the battery shell structure of the embodiment of the utility model, it includes: a shell body, an end plate and a ventilation plate; the shell body has an opening toward one end, and the first side wall of the shell is provided with an explosion-proof valve; the end plate cover is provided at the opening; the ventilation plate is installed on the inner side of the first side wall, and the ventilation plate has an exhaust channel connected to the explosion-proof valve, wherein a limiting structure is provided in the shell body to limit the ventilation plate between the limiting structure and the first side wall.

[0005] According to the battery shell structure of the embodiment of the utility model, the vent plate is installed in the battery shell through a limiting structure, which can not only effectively ensure the reliability of the installation of the vent plate to ensure the smoothness of the exhaust channel, but also make the installation of the vent plate more convenient and quick. At the same time, it effectively reduces the overall production cost of the battery and increases the selectivity of the material of the vent plate.

[0006] In addition, the battery housing structure according to the utility model may also have the following additional technical features:

[0007] In some embodiments, the shell body also includes a second side wall and a third side wall connected on both sides of the first side wall, and the limiting structure includes limiting ribs arranged on the second side wall and / or the third side wall, and at least one limiting rib is provided.

[0008] In some embodiments, the limiting rib of the second side wall is a first limiting rib, the limiting rib of the third side wall is a second limiting rib, and both the first limiting rib and the second limiting rib extend in a direction parallel to the first side wall.

[0009] In some embodiments, in a direction perpendicular to the first side wall, the distance between the lower surface of the first limiting rib and the inner surface of the first side wall is L1, and the distance between the lower surface of the second limiting rib and the inner surface of the first side wall is L2, satisfying: 0.1mm≤L1≤10mm; 0.1mm≤L2≤10mm.

[0010] In some embodiments, a plane constructed by the first limiting ribs and the second limiting ribs is parallel to the first side wall.

[0011] In some embodiments, in a direction perpendicular to the first side wall, the thickness T of the limiting rib satisfies: 0.1mm≤T≤10mm; and / or, in a direction parallel to the first side wall, the width W of the limiting rib satisfies: 0.01mm≤W≤50mm.

[0012] In some embodiments, the surface of the vent plate facing away from the first side plate has a first limiting groove opposite to the first limiting rib, and a second limiting groove opposite to the second limiting rib, and a support protrusion abutting against the pole group is constructed between the first limiting groove and the second limiting groove, wherein the distance L3 between the surface of the support protrusion facing away from the first side wall and the surface of the first limiting rib facing away from the first side wall, and the distance L4 between the surface of the support protrusion facing away from the first side wall and the surface of the second limiting rib facing away from the first side wall satisfy: 0mm≤L3≤2mm; 0mm≤L4≤2mm.

[0013] In some embodiments, the ventilation plate is an integrally-injected injection-molded part, or the ventilation plate includes a first section and a second section connected to each other, and the first section and the second section are made of different materials.

[0014] In some embodiments, the exhaust passage includes a ventilation and weight-reducing hole disposed on the ventilation plate, and a plurality of the ventilation and weight-reducing holes are provided, and the plurality of the ventilation and weight-reducing holes are arranged in a matrix.

[0015] The utility model also provides a battery having the above embodiment.

[0016] According to the battery of the embodiment of the utility model, by providing the battery housing structure of the above embodiment, the safety performance of the battery as a whole can be effectively improved.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a battery according to an embodiment of the utility model;

[0019] Figure 2 is a top view of a battery according to an embodiment of the utility model;

[0020] Figure 3 is based on Figure 2 Sectional view along line AA;

[0021] Figure 4 is based on Figure 3 A magnified view of area B in FIG.

[0022] Figure 5 Schematic diagram of a ventilation plate (first embodiment) of a battery housing structure according to an embodiment of the utility model;

[0023] Figure 6 is a schematic diagram of a ventilation plate (second embodiment) of a battery housing structure according to an embodiment of the utility model;

[0024] Figure 7 It is a partial enlarged view of the battery housing structure (cross-section) according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] 100. Battery housing structure; 200. Battery;

[0027] 1. Shell body; 11. First side wall; 12. Second side wall; 13. Third side wall; 14. Limiting structure; 15. Explosion-proof valve; 141. First limiting rib; 142. Second limiting rib;

[0028] 2. End plate;

[0029] 3. Ventilation plate; 31. Exhaust channel; 32. First limiting groove; 33. Second limiting groove; 34. Support protrusion; 35. First section; 36. Second section;

[0030] 4. Pole group. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Reference below Figure 1-Figure 7 A battery housing structure 100 according to an embodiment of the present invention is described.

[0036] like Figures 1 to 7 As shown, the battery shell structure 100 according to the embodiment of the utility model includes: a shell body 1, an end plate 2 and a ventilation plate 3; the shell body 1 has an opening toward one end, and the first side wall 11 of the shell is provided with an explosion-proof valve 15; the end plate 2 is covered at the opening to open or close the opening; the ventilation plate 3 is installed on the inner side of the first side wall 11, and the ventilation plate 3 has an exhaust channel 31 connected to the explosion-proof valve 15, wherein a limiting structure 14 is provided in the shell body 1 to limit the ventilation plate 3 between the limiting structure 14 and the first side wall 11.

[0037] In this embodiment, when the electrode group 4 has thermal runaway, the high-pressure gas and liquid inside the battery 200 reach the explosion-proof valve 15 through the exhaust channel 31 on the vent plate 3, and are discharged outside the battery 200 housing through the explosion-proof valve 15; for example Figure 4As shown, the vent plate 3 is installed between the first side wall 11 and the pole group 4 through a limiting structure 14. The limiting structure 14 can limit the vent plate 3 to prevent the vent plate 3 from shifting in position, thereby ensuring that the exhaust channel 31 is always connected to the explosion-proof valve 15 and opposite to the pole group 4, so that high-pressure gas and liquid can be discharged from the battery 200 shell in time to ensure the safety of the battery 200.

[0038] Compared with the prior art, the ventilation plate 3 is installed by hot melting and the ventilation plate 3 is installed by bonding. The ventilation plate 3 is limited and fixed by setting a limiting structure 14, which not only does not limit the manufacturing material of the ventilation plate 3, but also makes the assembly of the ventilation plate 3 more secure. At the same time, it avoids the problem of deformation of the ventilation plate 3 during the hot melting process.

[0039] According to the battery shell structure 100 of the embodiment of the utility model, the ventilation plate 3 is installed in the battery 200 shell through the limiting structure 14, which can not only effectively ensure the reliability of the installation of the ventilation plate 3 to ensure the smoothness of the exhaust channel 31, but also make the installation of the ventilation plate 3 more convenient and quick. At the same time, it effectively reduces the overall production cost of the battery 200 and increases the selectivity of the material of the ventilation plate 3.

[0040] In one embodiment of the present invention, Figures 1 to 7 As shown, the shell body 1 also includes a second side wall 12 and a third side wall 13 connected to both sides of the first side wall 11, and the limiting structure 14 includes limiting ribs arranged on the second side wall 12 and / or the third side wall 13, and at least one limiting rib is provided.

[0041] In this embodiment, the limiting ribs can be provided on the second side wall 12, or on the third side wall 13, or on both the second side wall 12 and the third side wall 13; for example Figure 4 As shown, limiting ribs are provided on the second side wall 12 and the third side wall 13, and the ventilation plate 3 is installed between the first side wall 11 and the pole group 4 through the limiting ribs. Such a design can ensure the stability of the installation of the ventilation plate 3 and can effectively prevent the ventilation plate 3 from positional displacement.

[0042] In a specific embodiment of the present invention, Figures 1 to 7 As shown, the limiting ribs of the second side wall 12 are first limiting ribs 141 , and the limiting ribs of the third side wall 13 are second limiting ribs 142 . Both the first limiting ribs 141 and the second limiting ribs 142 extend in a direction parallel to the first side wall 11 .

[0043] In this specific embodiment, the provision of the two limiting ribs can effectively ensure the installation stability of the vent plate 3, so that when the high-pressure gas and liquid pass through the exhaust channel 31 on the vent plate 3, the vent plate 3 will not shake or shift in position, thereby effectively ensuring that the high-pressure gas or liquid can be smoothly discharged out of the battery 200 shell, thereby ensuring the overall safety of the battery 200; the first limiting rib 141 and the second limiting rib 142 both extend in a direction parallel to the first side wall 11, which can effectively increase the contact area between the vent plate 3 and the limiting ribs to ensure the installation stability of the vent plate 3.

[0044] In a specific embodiment of the present invention, Figures 1 to 7 As shown, in the direction perpendicular to the first side wall 11 , the distance between the first limiting rib 141 and the first side wall 11 is L1, and the distance between the second limiting rib 142 and the first side wall 11 is L2, satisfying: 0.1mm≤L1≤10mm; 0.1mm≤L2≤10mm.

[0045] In this specific embodiment, when the distance L1 between the first limiting rib 141 and the first side wall 11 and the distance L2 between the second limiting rib 142 and the first side wall 11 are both less than 0.1 mm, the distances between the first limiting rib 141 and the second limiting rib 142 and the first side wall 11 are too small, and the vent plate 3 cannot be installed; when the distance L1 between the first limiting rib 141 and the first side wall 11 and the distance L2 between the second limiting rib 142 and the first side wall 11 are both greater than 10 mm, the first limiting rib 141 and the second limiting rib 142 The distance from the first side wall 11 is too large, the first limiting rib 141 and the second limiting rib 142 cannot effectively limit the ventilation plate 3, and the ventilation plate 3 is prone to movement and position displacement; when the distance L1 between the first limiting rib 141 and the first side wall 11 and the distance L2 between the second limiting rib 142 and the first side wall 11 are both greater than or equal to 0.1 mm and less than or equal to 10 mm, the first limiting rib 141 and the second limiting rib 142 can effectively limit the ventilation plate 3, thereby ensuring the stability of the installation of the ventilation plate 3.

[0046] In some embodiments, Figures 1 to 7 As shown, the plane constructed by the first limiting rib 141 and the second limiting rib 142 is parallel to the first side wall 11, so that the installation of the ventilation plate 3 is convenient and the assembly efficiency is improved.

[0047] In a specific embodiment of the present invention, Figures 1 to 7As shown, in the direction perpendicular to the first side wall 11, the thickness T of the limiting rib satisfies: 0.1mm≤T≤10mm; and / or, in the direction parallel to the first side wall 11, the width W of the limiting rib satisfies: 0.01mm≤W≤50mm; that is, either the thickness T of the limiting rib or the width W of the limiting rib may satisfy the corresponding value range, or both the thickness T of the limiting rib and the width W of the limiting rib may satisfy the corresponding value range.

[0048] Furthermore, when the thickness T of the limiting rib is less than 0.1 mm, the thickness of the limiting rib is too thin, the structural strength is not high, and it is easy to deform, and it is impossible to provide effective support and limitation for the ventilation plate 3; when the thickness T of the limiting rib is greater than 10 mm, the thickness of the limiting rib is too thick, which not only increases the weight of the battery 200 shell, but also occupies too much installation space, making it difficult to install the ventilation plate 3 and the electrode group 4; when the thickness T of the limiting rib is greater than or equal to 0.1 mm and less than or equal to 10 mm, the limiting rib can provide effective support and limitation for the ventilation plate 3, and can also not occupy too much installation space.

[0049] Furthermore, in the direction parallel to the first side wall 11, the width W of the limiting rib satisfies: 0.01mm≤W≤50mm. When the width W of the limiting rib is less than 0.01mm, the width of the limiting rib is too small, resulting in a too small contact area between the limiting rib and the vent plate 3, so that the limiting rib cannot effectively limit the vent plate 3; when the width W of the limiting rib is greater than 50mm, the width of the limiting rib is too large, increasing the production cost; when the width W of the limiting rib is greater than or equal to 0.01mm and less than or equal to 50mm, the limiting rib can both effectively limit the vent plate 3 and effectively reduce the production cost.

[0050] In a specific embodiment of the present invention, Figures 1 to 7 As shown, the surface of the ventilation plate 3 facing away from the first side plate has a first limiting groove 32 opposite to the first limiting rib 141, and a second limiting groove 33 opposite to the second limiting rib 142, and a supporting protrusion 34 abutting against the pole group 4 is constructed between the first limiting groove 32 and the second limiting groove 33, wherein the distance L3 between the surface of the support protrusion 34 facing away from the first side wall 11 and the surface of the first limiting rib 141 facing away from the first side wall 11, and the distance L4 between the surface of the support protrusion 34 facing away from the first side wall 11 and the surface of the second limiting rib 142 facing away from the first side wall 11 satisfy: 0mm≤L3≤2mm; 0mm≤L4≤2mm.

[0051] In this specific embodiment, the first limiting groove 32 and the second limiting groove 33 can enhance the installation stability of the ventilation plate 3, and the support protrusion 34 can cooperate with the pole group 4 to play a limiting role, thereby making the installation of the ventilation plate 3 more stable; when the distance L3 between the surface of the support protrusion 34 away from the first side wall 11 and the surface of the first limiting rib 141 away from the first side wall 11 and the distance L4 between the surface of the support protrusion 34 away from the first side wall 11 and the surface of the second limiting rib 142 away from the first side wall 11 are both less than 0 mm, the ventilation plate 3 and the limiting ribs will interfere with each other, thereby failing to achieve assembly; when the surface of the support protrusion 34 away from the first side wall 11 and the surface of the first limiting rib 141 away from the first side wall 11 are less than 0 mm, the ventilation plate 3 and the limiting ribs will interfere with each other, thereby failing to achieve assembly; When the distance L3 between the surface of the rib 141 away from the first side wall 11 and the distance L4 between the surface of the support protrusion 34 away from the first side wall 11 and the surface of the second limiting rib 142 away from the first side wall 11 are both greater than 2 mm, the gap between the ventilation plate 3 and the reinforcing rib is too large, and the ventilation plate 3 is prone to shaking; when the distance L3 between the surface of the support protrusion 34 away from the first side wall 11 and the surface of the first limiting rib 141 away from the first side wall 11 and the distance L4 between the surface of the support protrusion 34 away from the first side wall 11 and the surface of the second limiting rib 142 away from the first side wall 11 are both greater than or equal to 0 mm and less than or equal to 2 mm, the ventilation plate 3 can be stably assembled.

[0052] In some embodiments, the vent plate 3 is an integral injection molded part, or the vent plate 3 includes a first section 35 and a second section 36 connected, and the materials of the first section 35 and the second section 36 are different. In this specific embodiment, the vent plate 3 can be an integral injection molded part, or a split assembly, and the split assembly is divided into a first section 35 and a second section 36 connected. For example, the first section 35 is an integral injection molded part, and the second section 36 is a ceramic part. The first section 35 and the second section can also be made of other materials, which are not specifically limited here.

[0053] In one embodiment of the present invention, Figures 1 to 7 As shown, the exhaust channel 31 includes a plurality of air-permeable and weight-reducing holes provided on the ventilation plate 3, and the plurality of air-permeable and weight-reducing holes are arranged in a matrix. In this embodiment, the air-permeable and weight-reducing holes can not only effectively reduce the overall weight of the ventilation plate, but also ensure the smooth discharge of high-pressure gas and liquid.

[0054] The present invention also provides a battery 200 having the above embodiment.

[0055] According to the battery 200 of the embodiment of the utility model, by providing the battery housing structure 100 of the above embodiment, the overall safety performance of the battery 200 can be effectively improved.

[0056] Other structures and operations of the battery housing structure 100 and the battery 200 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery housing structure, It is characterized in that include: A shell body, wherein the shell body has an opening toward one end, and a first side wall of the shell body is provided with an explosion-proof valve; an end plate, wherein the end plate cover is arranged at the opening; A ventilation plate is installed on the inner side of the first side wall, and has an exhaust passage in the ventilation plate that is connected to the explosion-proof valve, wherein a limiting structure is provided in the shell body to limit the ventilation plate between the limiting structure and the first side wall.

2. The battery housing structure according to claim 1, It is characterized in that The shell body further includes a second side wall and a third side wall connected to both sides of the first side wall, and the limiting structure includes limiting ribs arranged on the second side wall and / or the third side wall, and at least one limiting rib is provided.

3. The battery housing structure according to claim 2, It is characterized in that The limiting rib of the second side wall is a first limiting rib, and the limiting rib of the third side wall is a second limiting rib. Both the first limiting rib and the second limiting rib extend in a direction parallel to the first side wall.

4. The battery housing structure according to claim 3, It is characterized in that In a direction perpendicular to the first side wall, a distance between the first limiting rib and the first side wall is L1, and a distance between the second limiting rib and the first side wall is L2, satisfying: 0.1 mm ≤ L1 ≤ 10 mm; 0.1 mm ≤ L2 ≤ 10 mm.

5. The battery housing structure according to claim 3, It is characterized in that A plane constructed by the first limiting rib and the second limiting rib is parallel to the first side wall.

6. The battery housing structure according to claim 2, It is characterized in that In a direction perpendicular to the first side wall, the thickness T of the limiting rib satisfies: 0.1 mm ≤ T ≤ 10 mm; And / or, in a direction parallel to the first side wall, a width W of the limiting rib satisfies: 0.01 mm≤W≤50 mm.

7. The battery housing structure according to claim 3, It is characterized in that The surface of the vent plate facing away from the first side wall has a first limiting groove opposite to the first limiting rib and a second limiting groove opposite to the second limiting rib, and a supporting protrusion abutting against the pole group is constructed between the first limiting groove and the second limiting groove, wherein: A distance L3 between a surface of the support protrusion away from the first side wall and a surface of the first limiting rib away from the first side wall, and a distance L4 between a surface of the support protrusion away from the first side wall and a surface of the second limiting rib away from the first side wall, satisfy: 0mm≤L3≤2mm; 0mm≤L4≤2mm.

8. The battery housing structure according to claim 1, It is characterized in that The ventilation plate is an integrally-injected injection-molded part, or the ventilation plate includes a first section and a second section connected to each other, and the first section and the second section are made of different materials.

9. The battery housing structure according to claim 1, It is characterized in that The exhaust passage includes a ventilation and weight-reducing hole arranged on the ventilation plate, and a plurality of the ventilation and weight-reducing holes are provided, and the plurality of the ventilation and weight-reducing holes are arranged in a matrix.

10. A battery, It is characterized in that A battery casing structure comprising the battery casing structure described in any one of claims 1 to 9.

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