Protective plate and battery monomer with same

Abstract

The utility model discloses a protection plate and its battery monomer, the protection plate is provided between electrode subassembly and shell, the protection plate includes: first plate and second plate, the first plate and second plate are spaced apart along the thickness direction of first plate, the first plate is located on the side, facing the electrode assembly, of the second plate; and the plurality of supporting ribs are connected between the first plate and the second plate. According to the protection plate disclosed by the utility model, the electrode assembly can be prevented from being damaged by burrs due to direct contact between the electrode assembly and the welding area of the shell, and more acting force on the electrode assembly when the battery monomer vibrates can be absorbed, so that the reliability of the battery monomer is improved.

Description

Technical Field

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

[0002] The battery cell is the basic unit of the battery pack. During the production process of some current battery cells, the shell will use a welding process, and burrs may remain at the welding site. In order to prevent the burrs from damaging the electrode assembly, a protective plate is usually provided between the electrode assembly and the weld. In related technologies, the protective plate absorbs less of the force acting on the electrode assembly during the vibration of the battery cell, thereby affecting the reliability of the battery cell. 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 protective plate, which can improve the reliability of battery cells.

[0004] The utility model also provides a battery monomer having the protective plate.

[0005] According to the protective plate of the first aspect of the utility model, the protective plate is arranged between the electrode assembly and the shell, including: a first plate and a second plate, the first plate and the second plate are arranged at intervals along the thickness direction of the first plate, and the first plate is located on the side of the second plate facing the electrode assembly; a plurality of support ribs, and the plurality of support ribs are connected between the first plate and the second plate.

[0006] The protective plate according to the first aspect of the utility model can avoid direct contact between the electrode assembly and the welding area of ​​the shell so that burrs damage the electrode assembly, and can absorb more forces on the electrode assembly when the battery cell vibrates, thereby improving the reliability of the battery cell.

[0007] According to some embodiments of the present invention, the plurality of support ribs extend along a first direction within a first plane and are arranged sequentially in a second direction, the first plane is perpendicular to the thickness direction of the protective plate, and the first direction and the second direction intersect.

[0008] According to some embodiments of the present invention, the supporting ribs are arranged obliquely relative to the thickness direction of the protective plate.

[0009] According to some embodiments of the present invention, in a direction from the first plate to the second plate, the supporting ribs extend along an arc.

[0010] According to some embodiments of the present invention, two adjacent support ribs are arranged at an angle.

[0011] According to some embodiments of the present invention, in the second direction, a plurality of the supporting ribs are sequentially connected or not connected.

[0012] According to some embodiments of the present invention, in the second direction, the facing surfaces of two adjacent supporting ribs are connected by an arc.

[0013] According to some embodiments of the present invention, the protective plate is an insulating member; and / or at least one through hole is formed on the protective plate and penetrates the protective plate along the thickness direction of the protective plate.

[0014] According to some embodiments of the present invention, the length of the protective plate is 280mm-980mm; and / or, the width of the protective plate is 8mm-25mm; and / or, the thickness of the protective plate is 0.5mm-1.5mm.

[0015] According to the second aspect of the utility model, the battery cell comprises: a shell, the shell defines a mounting cavity, the shell has a welding area; an electrode assembly, the electrode assembly is arranged in the mounting cavity; the above-mentioned protective plate according to the first aspect of the utility model, the protective plate is arranged in the mounting cavity, and the protective plate is arranged between the electrode assembly and the welding area.

[0016] According to the battery cell of the second aspect of the utility model, by setting the above-mentioned protective plate according to the first aspect of the utility model, it is possible to avoid direct contact between the electrode assembly and the welding area of ​​the shell to cause burrs to damage the electrode assembly, and absorb part of the force on the electrode assembly when the battery cell vibrates, thereby improving the reliability of the battery cell.

[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 cell according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 An exploded view of a battery cell shown in ;

[0020] Figure 3 yes Figure 2 A schematic diagram of the protective plate shown in ;

[0021] Figure 4 yes Figure 3 A schematic diagram of another angle of the protective plate shown in FIG.

[0022] Figure 5 yes Figure 4A cross-sectional view of the protective plate shown in ;

[0023] Figure 6 yes Figure 5 An enlarged view of A shown in FIG.

[0024] Reference numerals:

[0025] 1000, battery cell;

[0026] 100. Protective plate;

[0027] 10. First board;

[0028] 20. Second board;

[0029] 30. Support ribs;

[0030] 40. Through hole;

[0031] 200, housing;

[0032] 300. Electrode assembly;

[0033] 400, insulating film;

[0034] 500. Cover plate. DETAILED DESCRIPTION

[0035] 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.

[0036] Reference below Figure 1-Figure 6 A protection plate 100 according to an embodiment of the first aspect of the present invention is described.

[0037] According to the first embodiment of the utility model, the protective plate 100 is disposed between the electrode assembly 300 and the housing 200. Figure 2 , Figure 5 and Figure 6 As shown, the protection plate 100 includes: a first plate 10 , a second plate 20 and a plurality of support ribs 30 .

[0038] Specifically, the first plate 10 and the second plate 20 are arranged at intervals along the thickness direction of the first plate 10 , the first plate 10 is located on the side of the second plate 20 facing the electrode assembly 300 , and the plurality of support ribs 30 are connected between the first plate 10 and the second plate 20 .

[0039] After assembly, the protective plate 100 is supported between the welding area of ​​the electrode assembly 300 and the shell 200. The protective plate 100 can provide shielding for the electrode assembly 300 to prevent the electrode assembly 300 from directly contacting the welding area of ​​the shell 200 so that burrs may damage the electrode assembly 300, thereby improving the reliability of the battery cell 1000.

[0040] During the operation of the battery cell 1000 , vibration is inevitably generated, and the vibration may cause the electrode assembly 300 to strike the housing 200 , thereby affecting the reliability of the battery cell 1000 .

[0041] In this embodiment, by providing a plurality of connecting ribs between the first plate 10 and the second plate 20, when the electrode assembly 300 vibrates and squeezes the protective plate 100, the first plate 10 and the second plate 20 can compress the connecting ribs, so that the protective plate 100 can absorb a portion of the force on the electrode assembly 300, thereby buffering the electrode assembly 300 and reducing the vibration amplitude of the electrode assembly 300. At the same time, a gap can be formed between the first plate 10 and the second plate 20, and the gap can provide an escape space for the deformation of the first plate 10 and the second plate 20. During the deformation process of the first plate 10 and the second plate 20, a portion of the force on the electrode assembly 300 can also be absorbed, thereby further reducing the vibration amplitude of the electrode assembly 300 and improving the reliability of the battery cell 1000.

[0042] Among them, multiple connecting ribs can provide support between the first plate 10 and the second plate 20 at multiple positions, which can improve the uniformity of the distribution of the force on the protective plate 100, and when some of the connecting ribs are damaged, the remaining connecting ribs can still provide support, thereby improving the reliability of the protective plate 100 during operation.

[0043] In addition, the gap between the first plate 10 and the second plate 20 can provide an exhaust channel for the battery cell 1000 to make the exhaust smoother.

[0044] During product design, the number, size, or relative angle between the connecting ribs and the first plate 10 and the second plate 20 can be adjusted according to usage requirements, thereby meeting more product design requirements.

[0045] According to the protective plate 100 of the first embodiment of the utility model, it is possible to prevent the electrode assembly 300 from directly contacting the welding area with the shell 200 so as to avoid burrs damaging the electrode assembly 300, and it is possible to absorb more force on the electrode assembly 300 when the battery cell 1000 vibrates, thereby improving the reliability of the battery cell 1000.

[0046] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, a plurality of support ribs 30 are arranged along a first direction in a first plane (eg Figure 6 ) and in a second direction (e.g. Figure 6 The first plane is perpendicular to the thickness direction of the protective plate 100, and the first direction and the second direction intersect. In this way, during the production process, each support rib 30 can be connected to the first plate 10 and the second plate 20 separately, thereby reducing the production difficulty and improving the production efficiency.

[0047] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, the support rib 30 is inclined relative to the thickness direction of the protective plate 100. In this way, when the first plate 10 and the second plate 20 compress the support rib 30, the support rib 30 can be deformed more easily, and the deformation range of the support rib 30 is larger, thereby improving the vibration reduction effect of the protective plate 100.

[0048] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, the support rib 30 extends along an arc in the direction from the first plate 10 to the second plate 20. Thus, the maximum inclination angle of the support rib 30 relative to the thickness direction of the protective plate 100 can be increased, and when the first plate 10 and the second plate 20 compress the support rib 30, the deformation range of the support rib 30 can be further increased, thereby further improving the vibration reduction effect of the protective plate 100.

[0049] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, two adjacent support ribs 30 are arranged at an angle. In this way, the force between the first plate 10 and the second plate 20 can be dispersed to more directions, thereby improving the stability of the first plate 10 and the second plate 20, wherein, preferably, the two adjacent support ribs 30 are symmetrically distributed relative to the middle line extending in the thickness direction of the first plate 10, thereby, the force components of the force of the two adjacent support ribs 30 in the direction perpendicular to the thickness direction of the first plate 10 can be offset, thereby further improving the stability of the first plate 10 and the second plate 20, and improving the reliability of the support ribs 30 supporting the first plate 10 and the second plate 20.

[0050] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, in the second direction, a plurality of supporting ribs 30 are sequentially connected or not connected.

[0051] When multiple support ribs 30 are connected in sequence, the multiple support ribs 30 can provide support to each other, thereby improving the structural stability of the protective plate 100, and during the production process, the multiple support ribs 30 can be produced together and then connected to the first plate 10 and the second plate 20, thereby reducing production costs and improving production efficiency.

[0052] When the plurality of support ribs 30 are not connected in sequence, the gaps between the support ribs 30 may be increased, thereby increasing the efficiency of gas being discharged through the gaps between the first plate 10 and the second plate 20 , further improving the exhaust efficiency of the battery cell 1000 .

[0053] In some embodiments of the present invention, Figure 5 and Figure 6 As shown, in the second direction, the facing surfaces of two adjacent support ribs 30 are connected by arcs. In this way, the support strength of the support ribs 30 can be improved, thereby improving the reliability of the protective plate 100. Preferably, the radius R of the arc is 3 mm.

[0054] In some embodiments of the present invention, the protective plate 100 is an insulating member, thereby meeting the insulation requirements of the battery cell 1000. Preferably, the protective plate 100 may be made of polypropylene plastic or polyphenylene sulfide plastic, which has good insulation properties, is easy to process, and can reduce production costs.

[0055] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, at least one through hole 40 is formed on the protective plate 100 and penetrates the protective plate 100 along the thickness direction of the protective plate 100. For example, the number of through holes 40 may be one, two or ten, thereby further improving the exhaust efficiency of the battery cell 1000, thereby improving the safety of the battery cell 1000. When there are multiple through holes 40, preferably, the distance L between two adjacent through holes 40 is 20 mm.

[0056] In some embodiments of the present invention, the length of the protective plate 100 is 280mm-980mm. For example, the length of the protective plate 100 can be 280mm, 300mm, 480mm or 980mm. Thus, the length of the protective plate 100 can meet the usage requirements. During the product design process, the length of the protective plate 100 can be adjusted to meet more product design requirements.

[0057] In some embodiments of the utility model, the width of the protective plate 100 is 8mm-25mm. For example, the width of the protective plate 100 can be 8mm, 10mm, 11mm, 17mm, or 25mm. Thus, the width of the protective plate 100 can meet the needs of use. During the product design process, the width of the protective plate 100 can be adjusted to meet more product design needs.

[0058] In some embodiments of the utility model, the thickness of the protective plate 100 is 0.5mm-1.5mm. For example, the thickness of the protective plate 100 can be 0.5mm, 0.8mm, 1.2mm or 1.5mm. Thus, the thickness of the protective plate 100 can meet the use requirements. During the product design process, the thickness of the protective plate 100 can be adjusted to meet more product design requirements.

[0059] Reference below Figure 1-Figure 6 A battery cell 1000 according to an embodiment of the second aspect of the present invention is described.

[0060] like Figure 1 and Figure 2 As shown, the battery cell 1000 according to the embodiment of the second aspect of the present invention comprises: a housing 200, an electrode assembly 300 and the protective plate 100 according to the embodiment of the first aspect of the present invention.

[0061] Specifically, a mounting cavity is defined in the shell 200 , the shell 200 has a welding area, the electrode assembly 300 is disposed in the mounting cavity, the protective plate 100 is disposed in the mounting cavity, and the protective plate 100 is disposed between the electrode assembly 300 and the welding area.

[0062] Among them, the electrode assembly 300 can realize the charging and discharging functions of the battery cell 1000. During the production process, there may be burrs in the welding area that cannot be cleaned. After assembly is completed, the protective plate 100 can provide shielding between the welding area of ​​the electrode assembly 300 and the shell 200 to prevent the welding area from directly contacting the electrode assembly 300 and causing the burrs to damage the electrode assembly 300.

[0063] According to the battery cell 1000 of the embodiment of the second aspect of the present invention, the reliability of the battery cell 1000 can be improved by providing the protection plate 100 according to the embodiment of the first aspect of the present invention.

[0064] In some embodiments of the present invention, Figure 2 As shown, the battery cell 1000 further includes an insulating film 400 , which covers the electrode assembly 300 . By providing the insulating film 400 , the battery cell 1000 will not be short-circuited inside, so that the battery cell 1000 can work normally.

[0065] In some embodiments of the present invention, the welding area is located on the lower side of the shell 200, so that the protective plate 100 is also located on the lower side of the electrode assembly 300. It can be understood that when the chassis collides with an obstacle during driving of the vehicle, the lower side of the battery cell 1000 is more susceptible to compression. The protective plate 100 is arranged on the lower side of the electrode assembly 300 to absorb part of the impact of the obstacle, thereby improving the safety of the battery cell 1000.

[0066] In some embodiments of the present invention, the length of the battery cell 1000 is 300 mm-1000 mm, for example, the length of the battery cell 1000 can be 300 mm, 412 mm, 500 mm or 1000 mm. During product design, the length of the battery cell 1000 can be adjusted to meet more product design requirements.

[0067] In some embodiments of the present invention, the width of the battery cell 1000 is 50 mm-150 mm, for example, the width of the battery cell 1000 can be 50 mm, 120 mm, 131 mm or 150 mm. During product design, the width of the battery cell 1000 can be adjusted to meet more product design requirements.

[0068] In some embodiments of the present invention, the thickness of the battery cell 1000 is 12 mm-30 mm, for example, the thickness of the battery cell 1000 can be 12 mm, 15 mm, 27 mm or 30 mm. During product design, the thickness of the battery cell 1000 can be adjusted to meet more product design requirements.

[0069] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the battery cell 1000 further includes a cover plate 500 , and the cover plate 500 is sealed at both ends of the housing 200 , thereby achieving packaging of the battery cell 1000 .

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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 protective plate, the protective plate being arranged between the electrode assembly and the shell, characterized in that: include: A first plate and a second plate, wherein the first plate and the second plate are spaced apart in a thickness direction of the first plate, and the first plate is located on a side of the second plate facing the electrode assembly; A plurality of supporting ribs are connected between the first plate and the second plate.

2. The protective plate according to claim 1, characterized in that: The plurality of support ribs extend along a first direction within a first plane and are arranged sequentially in a second direction. The first plane is perpendicular to the thickness direction of the protective plate, and the first direction intersects with the second direction.

3. The protective plate according to claim 2, characterized in that: The supporting ribs are arranged obliquely relative to the thickness direction of the protective plate.

4. The protective plate according to claim 3, characterized in that: In a direction from the first plate to the second plate, the supporting ribs extend along an arc.

5. The protective plate according to claim 3, characterized in that: Two adjacent support ribs are arranged at an angle.

6. The protective plate according to claim 5, characterized in that: In the second direction, the plurality of support ribs are sequentially connected or not connected.

7. The protective plate according to claim 6, characterized in that: In the second direction, the facing surfaces of two adjacent supporting ribs are connected by an arc.

8. The protective plate according to any one of claims 1 to 7, characterized in that: The protective plate is an insulating member; and / or, At least one through hole is formed on the protection plate and penetrates the protection plate along the thickness direction of the protection plate.

9. The protective plate according to any one of claims 1 to 7, characterized in that: The length of the protective plate is 280mm-980mm; and / or, the width of the protective plate is 8mm-25mm; and / or, the thickness of the protective plate is 0.5mm-1.5mm.

10. A battery cell, characterized in that: include: A housing, wherein a mounting cavity is defined in the housing, and the housing has a welding area; an electrode assembly, wherein the electrode assembly is disposed in the mounting cavity; The protective plate described in any one of claims 1 to 9 is arranged in the mounting cavity, and the protective plate is arranged between the electrode assembly and the welding area.

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