End plate and battery cell having same

Abstract

The utility model discloses an end plate and a battery monomer with the same. The end plate comprises a first side plate, a second side plate, a baffle plate and a reinforcing piece, the first side plate extends along a first direction. The second side plate extends in the first direction and is spaced from the first side plate in the thickness direction of the first side plate. The baffle extends in the first direction, one end, in the thickness direction of the first side plate, of the baffle is connected with the side plate, the other end of the baffle extends towards the second side plate, and the other end of the baffle and the second side plate are spaced to define a through hole in a matched mode. The reinforcer is arranged on the second side plate. According to the end plate provided by the utility model, the reinforcing piece is arranged on the second side plate, so that the structural strength of the second side plate is improved, and the second side plate is not easy to concave inwards and deform.

Description

Technical Field

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

[0002] In the related art, since the width of the battery cell's pole lug is relatively wide, the dimension of the positive end plate passing through the pole lug is relatively large, and the end plate is usually made of PP material using an injection molding process. The baffle on one side of the end plate is prone to deformation and concave, and the pole lug is not easy to pass through the end plate, resulting in a low battery cell yield. 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 an end plate, the second side plate of the end plate has high structural strength and is not prone to inward concave deformation.

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

[0005] According to the end plate of the embodiment of the first aspect of the utility model, the end plate is arranged in the shell of the battery cell, and the end plate includes: a first side plate, the first side plate extends along the first direction; a second side plate, the second side plate extends along the first direction and is arranged with the first side plate in the thickness direction of the first side plate; a baffle, the baffle extends along the first direction, one end of the baffle in the thickness direction of the first side plate is connected to the first side plate and the other end extends toward the second side plate, the other end of the baffle is spaced apart from the second side plate to cooperate to define a through hole; a reinforcement member, the reinforcement member is arranged on the second side plate.

[0006] According to the end plate of the utility model, by arranging a reinforcement piece on the second side plate, the structural strength of the second side plate can be improved, so that the second side plate is not easily deformed inwardly, the tab passes through the end plate more smoothly, and the assembly yield is improved.

[0007] According to some embodiments of the present invention, the reinforcement member is a reinforcement plate extending along the first direction, and two ends of the reinforcement plate extend to two ends of the second side plate respectively.

[0008] According to some embodiments of the present invention, the reinforcing plate is arranged on a side of the second side plate facing the through hole.

[0009] According to some embodiments of the present invention, a groove is formed on the second side plate, and the reinforcing plate is embedded in the groove.

[0010] According to some embodiments of the present invention, the groove is formed on at least one side surface of the second side plate in the thickness direction, and the groove passes through one side end surface of the second side plate along the width direction of the second side plate.

[0011] According to some embodiments of the present invention, a limiting groove is formed on one of the reinforcement member and the second side plate, and a limiting protrusion is formed on the other one, and the limiting protrusion is adapted to the shape of the limiting groove and fits in the limiting groove.

[0012] According to some embodiments of the utility model, the groove has a first side wall, the first side wall is perpendicular to the width direction of the second side plate, the limiting protrusion is formed on the first side wall, and the limiting groove is formed on a side edge of the reinforcement facing the first side wall.

[0013] According to some embodiments of the utility model, the limiting groove has a first bottom wall, the first bottom wall is arranged perpendicular to the thickness direction of the second side plate, and in the thickness direction of the second side plate, the limiting protrusion is located on the side of the reinforcement facing the perforation, and the limiting protrusion is in contact with the first bottom wall in the thickness direction of the first side plate.

[0014] According to some embodiments of the present utility model, the number of the limiting protrusions and the number of the grooves are both multiple, and the multiple grooves correspond to the multiple limiting protrusions one-to-one.

[0015] According to some embodiments of the present invention, the reinforcement member is a ceramic member or a bakelite member.

[0016] The battery cell according to the embodiment of the second aspect of the utility model includes: a shell having a accommodating cavity with one side open; a top cover assembly, the top cover assembly sealing the open side of the shell; an electrode assembly, the electrode assembly is arranged in the accommodating cavity, the electrode assembly has a pole ear; the end plate according to the embodiment of the first aspect of the utility model, the end plate is arranged between the electrode assembly and the top cover assembly, and the pole ear is penetrated through the through hole.

[0017] According to the battery cell of the utility model, by setting the end plate of the first embodiment mentioned above and setting a reinforcing plate on the second side plate of the end plate, the second side plate is less likely to be concavely deformed, the pole ear passes through the end plate more smoothly, the assembly yield is improved, and at the same time, the contact between the electrode assembly and the shell is avoided, thereby improving the safety of the battery cell.

[0018] 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

[0019] Figure 1 is a schematic diagram of an end plate according to an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 An exploded view of the end plate shown in ;

[0021] Figure 3 yes Figure 2 The enlarged view of the point A shown in the middle circle;

[0022] Figure 4 yes Figure 2 A schematic diagram of the reinforcement plate shown in ;

[0023] Figure 5 yes Figure 2 Schematic diagram of the end plate shown in excluding the reinforcement;

[0024] Figure 6 yes Figure 2 A top view of the end plate without reinforcement is shown in FIG.

[0025] Reference numerals:

[0026] 100, end plate;

[0027] 11. first side plate; 12. second side plate; 121. groove; 1211. first side wall; 122. limiting protrusion; 13. baffle; 14. reinforcement; 141. limiting groove; 1411. first bottom wall; 101. through hole. DETAILED DESCRIPTION

[0028] 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.

[0029] Reference below Figure 1-Figure 6 The end plate 100 according to the first embodiment of the present invention is described.

[0030] like Figure 1 As shown, according to the end plate 100 of the embodiment of the first aspect of the utility model, the end plate 100 includes a first side plate 11 , a second side plate 12 , a baffle 13 , and a reinforcement member 14 .

[0031] Specifically, the first side plate 11 is arranged along a first direction (eg Figure 1 The second side plate 12 extends along the first direction and is connected to the first side plate 11 in the thickness direction of the first side plate 11 (for example Figure 1 The baffle plate 13 extends along the first direction, and the baffle plate 13 is disposed at one end (eg, Figure 1 The front end of the baffle 13 shown in FIG. 1 is connected to the first side plate 11 and the other end (eg Figure 1 The rear end of the baffle 13 shown in FIG. 1 extends toward the second side plate 12 , and the other end of the baffle 13 is spaced apart from the second side plate 12 to cooperate to define a through hole 101 . The reinforcement member 14 is disposed on the second side plate 12 .

[0032] Reference Figure 2 As shown, the first side plate 11 and the second side plate 12 of the end plate are both placed vertically and extend along the first direction. The first side plate 11 and the second side plate 12 are spaced apart in the front-to-back direction. The baffle plate 13 extends along the first direction and is arranged between the first side plate 11 and the second side plate 12. The front end of the baffle plate 13 is connected to the first side plate 11, and the rear end of the baffle plate 13 is spaced apart from the second side plate 12 to cooperate in defining a through hole 101. The electrode ear of the electrode assembly can extend from the lower side of the end plate 100 through the through hole to the upper side of the baffle plate 13.

[0033] The reinforcement member 14 is arranged on the second side plate 12 to strengthen the strength and rigidity of the second side plate 12 , so that the overall strength of the second side plate 12 can be improved, and the second side plate 12 can be prevented from bending and deforming due to various environmental factors or its own material, so that the tab can pass through the through hole 101 smoothly.

[0034] According to the end plate 100 of the present invention, by providing a reinforcement member 14 on the second side plate 12, the structural strength of the second side plate 12 can be improved, so that the second side plate 12 is not easily deformed inwardly, and the pole ear passes through the positive end plate 100 more smoothly, thereby improving the assembly yield.

[0035] According to some embodiments of the present invention, Figure 2-Figure 4 As shown, the reinforcement member 14 is a reinforcement plate extending along the first direction, and two ends of the reinforcement plate extend to two ends of the second side plate 12 respectively.

[0036] Specifically, the reinforcement 14 is a plate-like structure that is vertically arranged and extends in the front left and right directions. Arranging the reinforcement 14 as a reinforcement plate can simplify the structure of the reinforcement 14 and facilitate the processing and assembly of the reinforcement 14.

[0037] Reference Figure 2 As shown, the two ends of the reinforcing plate are respectively extended to the two ends of the second side panel 12, that is, the left end of the reinforcing member 14 extends to the left end adjacent to the second side panel 12 or is flush with the left end of the second side panel 12, and the right end of the reinforcing member 14 extends to the right end adjacent to the second side panel 12 or is flush with the right end of the second side panel 12. In this way, the reinforcing member 14 can reinforce the structural strength of the second side panel 12 in the entire length direction of the second side panel 12, and the effect of strength reinforcement is better, thereby further improving the strength of the second side panel 12.

[0038] According to some embodiments of the present invention, Figure 1-Figure 2As shown, the reinforcing plate is disposed on a side of the second side plate 12 facing the through hole 101 .

[0039] Specifically, refer to Figure 1 As shown, the reinforcing plate is arranged on the side of the second side plate 12 facing the through hole 101, that is, the reinforcing plate is located on the inner side of the second side plate 12. Therefore, it can not only avoid the reinforcing plate occupying the space outside the end plate 100 and avoid the reinforcing plate from interfering with other components in the shell of the battery cell, but also avoid external factors causing the reinforcing plate to fall off, thereby ensuring the reliability of the installation of the reinforcing plate.

[0040] According to some embodiments of the present invention, Figure 5 As shown, a groove 121 is formed on the second side plate 12 , and the reinforcing plate is embedded in the groove 121 .

[0041] Among them, the groove 121 can be formed on the two side surfaces of the second side plate 12 in the thickness direction, and the groove 121 can also be formed between the two side surfaces of the second side plate 12 in the thickness direction, and pass through the upper end surface or the lower end surface of the second side plate 12, and the reinforcing plate is embedded in the groove 121.

[0042] In this embodiment, a groove 121 is provided and a reinforcing plate is embedded in the groove 121. The groove 121 can not only install and position the reinforcing plate, but also increase the contact area between the second side plate 12 and the reinforcing plate, thereby enhancing the connection strength and stability between the second side plate 12 and the reinforcing plate.

[0043] According to some embodiments of the present invention, Figure 2-Figure 5 As shown, the groove 121 is formed on at least one side surface of the second side plate 12 in the thickness direction, and the groove 121 passes through one side end surface of the second side plate 12 along the width direction of the second side plate 12 .

[0044] Specifically, the groove 121 can be formed on a side surface of the second side plate 12 facing the perforation, that is, formed on Figure 2 The groove 121 may also be formed on the front surface of the second side plate 12 away from the perforation, that is, the groove 121 is formed on the front surface of the second side plate 12. Figure 2 The groove 121 is formed by recessing both side surfaces of the second side plate 12 in the thickness direction.

[0045] Furthermore, the groove 121 is formed along the width direction of the second side plate 12 (for example Figure 2 The groove 121 may penetrate one side end surface of the second side plate 12 in the vertical direction (in the vertical direction shown in FIG). That is, the groove 121 may penetrate the upper end surface or the lower end surface of the second side plate 12 in the vertical direction. Figure 2As shown, the groove 121 passes through the upper end surface of the second side plate 12. At this time, the groove 121 is formed as a semi-open groove 121. By providing the semi-open groove 121, it is convenient to assemble the second side plate 12 and the reinforcing plate.

[0046] Preferably, one side wall surface of the groove 121 in the thickness direction of the second side plate 12 is perpendicular to one side wall surface of the groove 121 in the width direction of the second side plate 12. Thus, the structure of the groove 121 can be simplified and the processing is convenient.

[0047] According to some embodiments of the present invention, Figure 2 As shown, a limiting groove 141 is formed on one of the reinforcement member 14 and the second side plate 12, and a limiting protrusion 122 is formed on the other, and the limiting protrusion 122 is adapted in shape to the limiting groove 141 and fits in the limiting groove 141. In other words, when the limiting groove 141 is provided on the reinforcement member 14, the limiting protrusion 122 is formed on the second side plate 12, and when the limiting protrusion 122 is provided on the reinforcement member 14, the limiting groove 141 is formed on the second side plate 12.

[0048] In this embodiment, by setting the cooperation between the limiting protrusion 122 and the limiting groove 141, the position of the reinforcement 14 on the second side plate 12 can be limited to ensure that the reinforcement 14 is always arranged on the second side plate 12, thereby improving the connection reliability between the reinforcement 14 and the second side plate 12, so that the reinforcement 14 can stably support the second side plate 12 to improve the strength of the second side plate 12.

[0049] According to some embodiments of the present invention, Figure 2-Figure 5 - Figure 6 As shown, the groove 121 is located on the second side plate 12, and the groove 121 has a first side wall 1211, the first side wall 1211 is perpendicular to the width direction of the second side plate 12, the limiting protrusion 122 is formed on the first side wall 1211, and the limiting groove 141 is formed on one side edge of the reinforcement member 14 facing the first side wall 1211 (for example Figure 3 ).

[0050] In this embodiment, the limiting protrusion 122 is formed on the first side wall 1211 of the groove 121, and the limiting groove 141 is formed on the side edge of the reinforcement 14 facing the first side wall 1211. This not only facilitates the processing of the limiting groove 141 and the molding of the limiting protrusion 122, but also avoids the problem of being unable to assemble due to processing precision errors, and is beneficial to the installation and cooperation of the limiting groove 141 and the limiting protrusion 122, thereby improving the assembly efficiency.

[0051] According to some embodiments of the present invention, Figure 4As shown, the limiting groove 141 has a first bottom wall 1411, and the first bottom wall 1411 is arranged perpendicular to the thickness direction of the second side plate 12. In the thickness direction of the second side plate 12, the limiting protrusion 122 is located on the side of the reinforcement member 14 facing the through hole 101 (for example Figure 3 The limiting protrusion 122 is in contact with the first bottom wall 1411 in the thickness direction of the second side plate 12 .

[0052] Reference Figure 3 As shown, in the front-to-back direction, the limiting groove 141 has a first bottom wall 1411 arranged perpendicular to the front-to-back direction, that is, the limiting groove 141 is not a through groove that passes through the second side plate 12 in the front-to-back direction. At the same time, in the front-to-back direction, the limiting protrusion 122 and the front side wall of the groove 121 are arranged spaced apart. In this way, when the limiting protrusion 122 is matched with the limiting groove 141, the reinforcement 14 located at the position of the limiting groove 141 is clamped between the limiting protrusion 122 and the front side wall of the groove 121, thereby limiting the displacement of the reinforcement 14 in the front-to-back direction and improving the fixing effect of the reinforcement 14.

[0053] According to some embodiments of the utility model, the number of the limiting protrusions 122 and the number of the limiting grooves 141 are both multiple, and the multiple limiting grooves 141 correspond one-to-one to the multiple limiting protrusions 122. By setting the multiple limiting protrusions 122 to correspond one-to-one to the multiple limiting grooves 141, the limiting effect and the clamping effect of the reinforcement member 14 can be further improved, and the connection reliability between the reinforcement rib and the second side plate 12 can be improved.

[0054] According to some embodiments of the utility model, the reinforcement 14 is a ceramic part or a bakelite part. The bakelite part has high mechanical strength, good insulation, heat resistance and corrosion resistance, and the ceramic part has high hardness and high strength. By using bakelite or ceramic as the material of the reinforcement 14, the reinforcement 14 can have high strength and good insulation performance.

[0055] The battery cell according to the embodiment of the second aspect of the utility model comprises a housing, a top cover assembly, an electrode assembly and the end plate 100 according to the embodiment of the first aspect of the utility model.

[0056] The shell has a receiving cavity with one side open. The top cover assembly covers the open side of the shell. The electrode assembly is arranged in the receiving cavity, and the electrode assembly has a pole ear; the end plate 100 is arranged between the electrode assembly and the top cover assembly, and the pole ear is penetrated through the through hole.

[0057] Specifically, the end plate 100 is located between the top cover assembly and the electrode assembly. After the pole ear is inserted into the perforation of the end plate 100, the top cover assembly is inserted into the shell and presses the end plate 100 to fix the electrode assembly. Among them, the end plate 100 of this embodiment can be the positive terminal plate 100, and the positive terminal plate 100 can also serve to accommodate the pole ear.

[0058] According to the battery cell of the embodiment of the utility model, by setting the end plate 100 of the above-mentioned first aspect embodiment, not only the insulation effect between the electrode assembly and the top cover can be ensured to avoid contact between the electrode assembly and the top cover assembly, but also the second side plate 12 of the end plate 100 has high structural strength, the side plate is not prone to inward deformation, and the pole ear passes through the end plate 100 more smoothly, thereby improving the assembly yield.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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. An end plate, arranged in a housing of a battery cell, characterized in that: The end plate comprises: a first side plate extending along a first direction; a second side plate extending along the first direction and spaced apart from the first side plate in the thickness direction of the first side plate; a baffle, the baffle extending in a first direction, one end of the baffle in the thickness direction of the first side plate being connected to the first side plate and the other end of the baffle extending toward the second side plate, the other end of the baffle being spaced apart from the second side plate to cooperate to define a through hole; A reinforcement member is arranged on the second side plate.

2. The end plate according to claim 1, characterized in that: The reinforcement member is a reinforcement plate extending along the first direction, and two ends of the reinforcement plate extend to two ends of the second side plate respectively.

3. The end plate according to claim 2, characterized in that: The reinforcing plate is arranged on a side of the second side plate facing the through hole.

4. The end plate according to claim 2, characterized in that: A groove is formed on the second side plate, and the reinforcing plate is embedded in the groove.

5. The end plate according to claim 4, characterized in that: The groove is formed on at least one side surface of the second side plate in the thickness direction, and the groove passes through one side end surface of the second side plate along the width direction of the second side plate.

6. The end plate according to claim 5, characterized in that: A limiting groove is formed on one of the reinforcement member and the second side plate, and a limiting protrusion is formed on the other one. The limiting protrusion is adapted to the shape of the limiting groove and fits in the limiting groove.

7. The end plate according to claim 6, characterized in that: The groove has a first side wall, the first side wall is perpendicular to the width direction of the second side plate, the limiting protrusion is formed on the first side wall, and the limiting groove is formed on a side edge of the reinforcement member facing the first side wall.

8. The end plate according to claim 7, characterized in that: The limiting groove has a first bottom wall, which is arranged perpendicular to the thickness direction of the second side plate. In the thickness direction of the second side plate, the limiting protrusion is located on the side of the reinforcement facing the through hole, and the limiting protrusion is in contact with the first bottom wall in the thickness direction of the first side plate.

9. The end plate according to claim 1, characterized in that: The reinforcing member is a ceramic member or a bakelite member.

10. A battery cell, characterized in that: include: A housing having a receiving cavity with one side open; a top cover assembly, the top cover assembly sealing the open side of the housing; An electrode assembly, the electrode assembly is disposed in the accommodating cavity, and the electrode assembly has a pole ear; According to any one of claims 1-9, the end plate is arranged between the electrode assembly and the top cover assembly, and the electrode tab is penetrated through the through hole.

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