Battery monomer and battery with same

Abstract

The single battery comprises a shell, end covers, a pole group and tabs connected to the two ends of the pole group, the pole group and the end covers are both located in the shell, the end covers are located at the two ends of the pole group, the tabs penetrate through the end covers, the end covers comprise the first end cover and the second end cover, and the first end cover and the second end cover are connected. A containing cavity is defined between the first end cover and the second end cover, and the tab is located in the containing cavity. According to the single battery disclosed by the utility model, the end covers are arranged at the two ends of the pole group, the tabs penetrate through the end covers, each end cover consists of the first end cover and the second end cover which are connected, and the first end cover and the second end cover can be used for isolating the contact between the tabs and the shell and preventing the short circuit of the single battery; and the processing mode and the assembling mode of the end cover are simple.

Description

Technical Field

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

[0002] In the related art, during battery assembly, the battery cover is connected to the pole ear. When the pole ear is long, after the positive electrode cover or the negative electrode cover is sealed onto the battery casing, the pole ear may contact the battery casing. Since the battery casing is made of metal, this situation will cause an internal short circuit in the battery. 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, one purpose of the utility model is to provide a battery cell, wherein the end cover is composed of a first end cover and a second end cover connected to each other, and the first end cover and the second end cover can be used to isolate the contact between the pole ear and the shell to prevent the battery cell from short circuit; and the processing and assembly methods of the end cover can also be simplified.

[0004] According to the battery cell of the first aspect of the present invention, the battery cell comprises: a shell, an end cover, a pole group and pole ears connected to the two ends of the pole group, the pole group and the end cover are both located in the shell, the end cover is located at the two ends of the pole group and the pole ear is passed through the end cover, the end cover comprises a first end cover and a second end cover connected to each other, an accommodating cavity is defined between the first end cover and the second end cover, and the pole ear is located in the accommodating cavity.

[0005] According to the battery cell of the embodiment of the utility model, end covers are provided at both ends of the electrode group, and the pole ears are passed through the end covers. The end covers are constructed by a first end cover and a second end cover that are connected. The first end cover and the second end cover can be used to isolate the pole ears from contacting the shell to prevent the battery cell from short circuiting; the processing and assembly methods of the end covers can also be simplified.

[0006] According to some embodiments of the utility model, the first end cover includes a first fixing plate, the first fixing plate is located in the accommodating cavity, the second end cover includes a second fixing plate, the second fixing plate is located in the accommodating cavity, and in a first direction, the first fixing plate and the second fixing plate are spaced apart to construct a first channel, and the pole ear is inserted into the first channel.

[0007] According to some embodiments of the utility model, the first end cover also includes a first end plate, which is located on a side of the first fixed plate away from the pole group, and the second end cover also includes a second end plate, which is located on a side of the second fixed plate away from the pole group, and in a first direction, the first end plate and the second end plate are spaced apart to form a second channel, and the pole ear is inserted into the second channel, and in the first direction, the width of the second channel is greater than the width of the first channel.

[0008] According to some embodiments of the present invention, in a second direction, a portion of the second channel is opposite to the first channel, wherein the first direction is perpendicular to the second direction.

[0009] According to some embodiments of the present invention, a connecting assembly is provided between the first end cover and the second end cover.

[0010] According to some embodiments of the present invention, the connecting assembly includes a matching buckle and a slot, the buckle is arranged on the first end cover, and the slot is arranged on the second end cover.

[0011] According to some embodiments of the utility model, a cover plate is further included, wherein the cover plate is connected to both ends of the shell, and a lead-out piece is provided on the cover plate, wherein the lead-out piece includes a first connecting piece and a second connecting piece connected to each other, wherein the first connecting piece is connected to the cover plate, and the second connecting piece is connected to the pole ear, and the second connecting piece is in contact with the pole ear, and the second connecting piece is located in the accommodating cavity, and an angle is formed between the first connecting piece and the second connecting piece.

[0012] According to some embodiments of the present invention, the first connecting piece is perpendicular to the second connecting piece.

[0013] According to some embodiments of the present invention, the first end cover and the second end cover are both integrally formed injection molded parts.

[0014] The battery according to the embodiment of the second aspect of the utility model includes: the battery cell according to the embodiment of the first aspect of the utility model.

[0015] According to the battery of the embodiment of the utility model, by setting the above-mentioned battery cell, end covers are provided at both ends of the electrode group, and the end covers can be used to isolate the contact between the electrode ears and the shell to prevent the battery cell from short circuit, and the cover plate is vertically placed on one side of the shell. When the cover plate is assembled to the shell, the cover plate can be directly pushed in the direction of the shell, which can improve the accuracy of the alignment of the cover plate and the opening of the shell, and improve the yield rate of the assembly of the cover plate and the shell.

[0016] 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

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of a pole group according to some embodiments of the utility model;

[0019] Figure 2 It is a schematic diagram of the matching of the pole group and the end cover according to some embodiments of the utility model;

[0020] Figure 3 It is a schematic diagram of the matching of the pole group, the end cover and the housing according to some embodiments of the utility model;

[0021] Figure 4 It is a schematic diagram of the cooperation between the housing and the cover plate according to some embodiments of the utility model;

[0022] Figure 5 yes Figure 4 The enlarged view of A in FIG.

[0023] Figure 6 is a schematic diagram of a battery cell according to some embodiments of the present utility model;

[0024] Figure 7 yes Figure 6 Magnified view of point B in FIG.

[0025] Reference numerals:

[0026] 100. Battery cell;

[0027] 11. Shell; 12. Pole group; 13. Pole ear; 14. Cover plate; 141. Lead-out plate; 1411. First connecting plate; 1412. Second connecting plate;

[0028] 20. End cover; 21. First end cover; 211. First fixing plate; 212. First end plate; 22. Second end cover; 221. Second fixing plate; 222. Second end plate; 23. Accommodating cavity; 231. First accommodating cavity; 232. Second accommodating cavity; 24. First channel; 25. Second channel. DETAILED DESCRIPTION

[0029] 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 or an electrical connection; 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 utility model can be understood according to specific circumstances.

[0032] Reference below Figure 1-Figure 7 A battery cell 100 according to an embodiment of the present invention is described.

[0033] The battery cell 100 according to the embodiment of the first aspect of the utility model comprises a housing 11, an end cover 20, a pole group 12 and a pole ear 13. The pole ear 13 has two, namely a positive pole ear and a negative pole ear, and the positive pole ear and the negative pole ear are respectively connected to the two ends of the pole group 12. The pole group 12 and the end cover 20 are both located in the housing 11. The end cover 20 also has two, and the two end covers 20 are respectively located at the two ends of the pole group 12, and the pole ear 13 is penetrated by the end cover 20; the battery cell 100 also comprises a cover plate 14, and the cover plate 14 has two, and the two cover plates 14 are respectively connected to the two ends of the housing 11, and the pole ear 13 is electrically connected to the cover plate 14, and the cover plate 14 is used to isolate the pole group 12 from the external environment to prevent water or dust in the external environment from entering the pole group 12 and causing damage to the pole group 12.

[0034] The end cap 20 includes a first end cap 21 and a second end cap 22, which are connected to each other, and a receiving cavity 23 is defined between the first end cap 21 and the second end cap 22, and the pole ear 13 is located in the receiving cavity 23. The first end cap 21 and the second end cap 22 are insulating parts. When the cover plate 14 is assembled, the cover plate 14 can bend the pole ear 13. The first end cap 21 and the second end cap 22 can be used to isolate the pole ear 13 from contacting the shell 11 to prevent the battery cell 100 from short-circuiting. The end cap 20 is constructed by the first end cap 21 and the second end cap 22. The end cap 20 is processed separately, which can simplify the processing method of the end cap 20. At the same time, the first end cap 21 and the second end cap 22 can be assembled to the pole group 12 in sequence, which can simplify the assembly method. When one of the first end cap 21 and the second end cap 22 needs to be repaired, the corresponding first end cap 21 and the second end cap 22 can be replaced, which can reduce the maintenance cost.

[0035] The second end cover 22 can be fixed on the mounting table, and the pole group 12 is transferred to the mounting table. The second end cover 22 can be pressed into the pole group 12 to fix the second end cover 22 on the pole group 12. The first end cover 21 can be fixedly connected to the second end cover 22, and the first end cover 21 is pressed into the pole group 12 at the same time.

[0036] According to the battery cell 100 of the embodiment of the utility model, end covers 20 are provided at both ends of the electrode group 12, and the pole ears 13 are passed through the end covers 20. The end covers 20 are constructed by a first end cover 21 and a second end cover 22 connected to each other. The first end cover 21 and the second end cover 22 can be used to isolate the pole ears 13 from contacting the shell 11 to prevent the battery cell 100 from short circuiting; and the processing and assembly methods of the end covers 20 can also be simplified.

[0037] According to some embodiments of the present invention, the first end cover 21 includes a first fixing plate 211, the first fixing plate 211 is located in the accommodating cavity 23, and the second end cover 22 includes a second fixing plate 221, the second fixing plate 221 is located in the accommodating cavity 23, and the first end cover 21 includes a first fixing plate 211, and the first fixing plate 211 is located in the accommodating cavity 23. Figure 5 In the e1 direction (ie, the thickness direction of the shell 11 ), the first fixing plate 211 and the second fixing plate 221 are spaced apart to form a first channel 24 , and the tab 13 is disposed in the first channel 24 .

[0038] Reference Figure 4-Figure 7In a specific embodiment, the pole lug 13 is passed through the first channel 24. Since the first end cover 21 and the second end cover 22 are pressed on both sides of the pole lug 13, the pole lug 13 can be bent in the accommodating cavity 23. Since the pole lug 13 is bent in the accommodating cavity 23, the pole lug 13 has a force in the bending direction. When the cover plate 14 is pressed onto the shell 11, the pole lug 13 can continue to bend into the accommodating cavity 23 along the bending direction. The position of the first channel 24 can determine the bending direction of the pole lug 13, preventing the pole lug 13 from bending onto the shell 11, causing a short circuit in the battery cell 100.

[0039] For example, the first fixing plate 211 and the second fixing plate 221 can separate the accommodating chamber 23 into a first accommodating chamber 231 and a second accommodating chamber 232 that are connected. Under the pressing force of the first fixing plate 211 and the second fixing plate 221, the pole ear 13 can be bent into the second accommodating chamber 232. When the cover plate 14 is pressed onto the shell 11, the pole ear 13 can continue to bend into the second accommodating chamber 232 along the bending direction.

[0040] According to some embodiments of the present invention, referring to Figure 4-Figure 7 The first end cover 21 further includes a first end plate 212 , which is located on a side of the first fixed plate 211 away from the pole group 12 . The second end cover 22 further includes a second end plate 222 , which is located on a side of the second fixed plate 221 away from the pole group 12 .

[0041] In the first direction, the first end plate 212 and the second end plate 222 are spaced apart to form a second channel 25 , the tab 13 is passed through the second channel 25 , and the tab 13 is passed through the first channel 24 and the second channel 25 in sequence to be electrically connected to the cover plate 14 outside the shell 11 .

[0042] In the first direction, the width of the second channel 25 is greater than the width of the first channel 24, and the first channel 24 is located on the side of the second channel 25 close to the pole group 12. When the cover plate 14 is assembled to the housing 11, the pole tab 13 can be bent along the second channel 25 into the accommodating cavity 23. The width of the first channel 24 is relatively narrow, which can fix the pole tab 13. The width of the second channel 25 is relatively wide, and the second channel 25 can provide enough space for the bending of the pole tab 13.

[0043] For example, the surface of the second fixing plate 221 in the first direction can form a first guiding slope, the surface of the first end plate 212 in the first direction can form a second guiding slope, the two side surfaces of the pole ear 13 can be respectively fitted with the first guiding slope and the second guiding slope, and when the pole ear 13 is bent, the first guiding slope and the second guiding slope can reduce the friction force when the pole ear 13 is bent.

[0044] According to some embodiments of the present invention, referring to Figure 4-Figure 7In the second direction (e.g. Figure 5 In the e2 direction, i.e., the length direction of the shell 11), part of the second channel 25 is opposite to the first channel 24, and the pole ear 13 is sequentially arranged in the first channel 24 and the second channel 25, and the first fixing plate 211, the second fixing plate 221, the first end plate 212 and the second end plate 222 can provide bending force for the pole ear 13, so that the pole ear 13 can be bent in the accommodating cavity 23, wherein the first direction is perpendicular to the second direction.

[0045] According to some embodiments of the present invention, referring to Figure 4-Figure 7 A connecting assembly is provided between the first end cover 21 and the second end cover 22 , and the connecting assembly is used to fix the first end cover 21 and the second end cover 22 .

[0046] According to some embodiments of the present invention, referring to Figure 4-Figure 7 The connection assembly includes a matching buckle and a slot, the buckle is provided on the first end cover 21, and the slot is provided on the second end cover 22. Through the cooperation of the buckle and the slot, the fixing method of the first end cover 21 and the second end cover 22 can be simple and easy to operate; at the same time, the processing method of the buckle and the slot is simple and low in cost.

[0047] Specifically, the first end cover 21 may be provided with a buckle on the end face in the first direction, and the number of the buckles may be multiple. The second end cover 22 may be provided with a slot on the end face in the first direction, and the number of the slots may be multiple. The number of the slots is equal to the number of the buckles and corresponds one to one, which can increase the reliability of fixing the first end cover 21 and the second end cover 22.

[0048] According to some embodiments of the present invention, referring to Figure 4-Figure 7 The battery cell 100 further includes a cover plate 14, which is connected to both ends of the housing 11. The cover plate 14 is provided with a lead-out piece 141, which includes a first connecting piece 1411 and a second connecting piece 1412 connected to each other. The first connecting piece 1411 is connected to the cover plate 14, and the second connecting piece 1412 is connected to the pole ear 13, and the second connecting piece 1412 is attached to the pole ear 13. The second connecting piece 1412 is located in the accommodating cavity 23, and there is an angle between the first connecting piece 1411 and the second connecting piece 1412. For example, the angle between the first connecting piece 1411 and the second connecting piece 1412 can be between 80° and 100°.

[0049] In the related art, the cover plate 14 lies flat on one side of the housing 11, and the tab 13 needs to be lengthened to electrically connect the tab 13 to the cover plate 14. When the cover plate 14 is assembled to the housing 11, the cover plate 14 needs to be flipped over, which may cause the cover plate 14 to be misaligned when assembled to the opening of the housing 11, resulting in poor assembly of the cover plate 14 and the housing 11. Figure 4-Figure 7In a specific embodiment, since the second connecting piece 1412 fits with the pole ear 13, and there is an angle between the first connecting piece 1411 and the second connecting piece 1412, the cover plate 14 can be placed vertically on one side of the shell 11, and the angle between the first connecting piece 1411 and the second connecting piece 1412 is between 80° and 100°. The second connecting piece 1412 can be inclined along the second direction. At this time, the required length of the pole ear 13 is shorter, which can reduce the cost of the pole ear 13; and it can also avoid the edge of the shell 11 from interfering with the edge of the cover plate 14. When the cover plate 14 is assembled to the shell 11, the cover plate 14 can be directly pushed toward the direction of the shell 11, which can improve the accuracy of the alignment of the cover plate 14 with the opening of the shell 11, improve the yield rate of the assembly of the cover plate 14 with the shell 11, and can cancel the action of flipping the cover plate 14, simplify the processing technology, and then optimize the processing equipment to reduce the cost and floor space of the processing equipment.

[0050] According to some embodiments of the present invention, referring to Figure 4-Figure 7 The first connecting piece 1411 is perpendicular to the second connecting piece 1412 , and the second connecting piece 1412 is placed horizontally along the second direction, which can facilitate the fitting of the tab 13 and the second connecting piece 1412 .

[0051] According to some embodiments of the present invention, referring to Figure 4-Figure 7 The first end cover 21 is an integrally formed injection molded part, which can increase the structural strength of the first end cover 21; for example, the first end cover 21 includes a first fixing plate 211 and a first end plate 212, and the first fixing plate 211 and the first end plate 212 are integrally formed when the first end cover 21 is processed, which can ensure the connection strength of the first fixing plate 211 and the first end plate 212.

[0052] The second end cover 22 is an integrally formed injection molded part, which can increase the structural strength of the second end cover 22; for example, the second end cover 22 includes a second fixing plate 221 and a second end plate 222, and the second fixing plate 221 and the second end plate 222 are integrally formed when the second end cover 22 is processed, which can ensure the connection strength of the second fixing plate 221 and the second end plate 222.

[0053] Reference Figure 1-Figure 7 , the present application also proposes an assembly process of a battery cell 100 .

[0054] Reference Figure 1 , the first step: welding the positive electrode tab 13 and the negative electrode tab 13 to both ends of the electrode group 12 at the same time;

[0055] Step 2: Cut the positive electrode tab 13 and the negative electrode tab 13 respectively;

[0056] Step 3: Wrap the electrode group 12 with a protective film;

[0057] Reference Figure 2 , Step 4: Assemble the end caps 20 at both ends of the electrode group 12 at the same time;

[0058] Reference Figure 3 , Step 5: placing the assembled pole group 12 in the housing 11;

[0059] Reference Figure 4 , Step 6: The positive electrode tab 13 and the negative electrode tab 13 are welded to the first lead-out pieces 141 of the two cover plates 14 at the same time;

[0060] Reference Figure 6 , Step 7: Press the two cover plates 14 onto the housing 11 at the same time;

[0061] Step 8: Weld the two cover plates 14 and the shell 11 simultaneously.

[0062] In the above assembly process, the positive electrode tab and the negative electrode tab of the electrode group 12 are welded simultaneously, and the cover plates 14 on both sides of the shell 11 are welded simultaneously, which greatly improves the welding efficiency.

[0063] The battery according to the embodiment of the second aspect of the utility model comprises: the battery cell 100 according to the embodiment of the first aspect of the utility model.

[0064] According to the battery of the embodiment of the utility model, by setting the above-mentioned battery cell 100, end covers 20 are provided at both ends of the electrode group 12, and the end covers 20 can be used to isolate the contact between the pole ear 13 and the shell 11 to prevent the battery cell 100 from short circuit; and the cover plate 14 is vertically placed on one side of the shell 11. When the cover plate 14 is assembled to the shell 11, the cover plate 14 can be directly pushed in the direction of the shell 11, which can improve the accuracy of the alignment of the cover plate 14 with the opening of the shell 11, and improve the assembly yield of the cover plate 14 and the shell 11.

[0065] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0066] 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 cell, characterized in that: include: A shell, an end cover, a pole group and pole ears connected to the two ends of the pole group, the pole group and the end cover are both located in the shell, the end cover is located at the two ends of the pole group and the pole ear is penetrated by the end cover, the end cover includes a first end cover and a second end cover connected to each other, an accommodating cavity is defined between the first end cover and the second end cover, and the pole ear is located in the accommodating cavity.

2. The battery cell according to claim 1, characterized in that: The first end cover includes a first fixing plate, the first fixing plate is located in the accommodating cavity, the second end cover includes a second fixing plate, the second fixing plate is located in the accommodating cavity, and in a first direction, the first fixing plate and the second fixing plate are spaced apart to form a first channel, and the pole ear is arranged in the first channel.

3. The battery cell according to claim 2, characterized in that: The first end cover also includes a first end plate, which is located on a side of the first fixed plate away from the pole group. The second end cover also includes a second end plate, which is located on a side of the second fixed plate away from the pole group. In a first direction, the first end plate and the second end plate are spaced apart to form a second channel, and the pole ear is inserted into the second channel. In the first direction, the width of the second channel is greater than the width of the first channel.

4. The battery cell according to claim 3, characterized in that: A portion of the second channel is opposite to the first channel in a second direction, wherein the first direction is perpendicular to the second direction.

5. The battery cell according to claim 1, characterized in that: A connecting assembly is provided between the first end cover and the second end cover.

6. The battery cell according to claim 5, characterized in that: The connecting assembly includes a matching buckle and a slot, the buckle is arranged on the first end cover, and the slot is arranged on the second end cover.

7. The battery cell according to claim 1, characterized in that: It also includes a cover plate, which is connected to both ends of the shell, and a lead-out piece is provided on the cover plate, and the lead-out piece includes a first connecting piece and a second connecting piece that are connected to each other, the first connecting piece is connected to the cover plate, the second connecting piece is connected to the pole ear, and the second connecting piece is in contact with the pole ear, the second connecting piece is located in the accommodating cavity, and there is an angle between the first connecting piece and the second connecting piece.

8. The battery cell according to claim 7, characterized in that: The first connecting piece is perpendicular to the second connecting piece.

9. The battery cell according to claim 1, characterized in that: The first end cover and the second end cover are both integrally formed injection molded parts.

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

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