Battery with multiple fool-proof devices

Abstract

The utility model discloses a battery with multiple fool-proof devices. The battery comprises a shell, a battery cell and a cover plate, the battery cell is provided with a positive plate and a negative plate, and further comprises a positive plate group connecting aluminum bar and a negative plate group connecting aluminum bar, the positive plate group connecting aluminum bar and the negative plate group connecting aluminum bar are respectively matched with the end surface of the positive plate and the end surface of the negative plate in shape, and the negative plate group connecting aluminum bar is matched with the end surface of the negative plate in shape; the positive electrode group connecting aluminum bar and the negative electrode group connecting aluminum bar are provided with positive and negative electrode contacts which protrude upwards; a positive groove and a negative groove are formed in the inner side of the cover plate and are matched with the positive contact and the negative contact in shape; when the cover plate is buckled, the positive electrode contact is inserted into the positive electrode groove, and the negative electrode contact is inserted into the negative electrode groove at the same time. According to the utility model, a multi-fool-proof device is established on each part related to the positive and negative electrodes, which may make mistakes, by means of shape and structure difference and the like, so that assembly mistakes of the electrode structure are avoided.

Description

Technical Field

[0001] The utility model relates to a battery cell housing, in particular to a battery with multiple anti-fooling devices Background Art

[0002] For the series and parallel connection of existing aluminum shell battery cells, laser welding aluminum bars are used to connect the positive and negative electrodes of different battery cells, so as to realize the series and parallel connection of battery cells. This method requires a special laser welding machine to achieve aluminum bar welding, and the cost is relatively high. At the same time, the adaptability is poor. When the size of the battery cell is too small, the size of the tab will also be too small, and it may occur that the welding base cannot adapt to the small-sized tab, resulting in the problem of needing to change the machine model. In addition, the debugging time is long. When using laser welding for battery cells of different sizes, the machine parameters need to be readjusted

[0003] In addition, when installing the positive and negative electrodes of existing aluminum shell battery cells, it is necessary to distinguish them. The distinguishing methods mostly use engraving positive and negative marks at the positive and negative protection rings of the cover plate, and using protection rings of different colors to distinguish the positive and negative electrodes to prevent mistakes (anti-error). Different from lithium batteries that use different metals as electrodes, the positive and negative tab materials of sodium batteries are both aluminum, and cannot be distinguished by metal or color. Even with the cooperation of protection rings of different colors, the protection rings of different colors themselves may be installed incorrectly, resulting in the situation that the positive and negative electrodes may be welded reversely during cover plate welding Summary of the Utility Model

[0004] Aiming at the limitations of the existing battery cell series and parallel connection method and the problem that it is easy to make mistakes in distinguishing the positive and negative electrodes of existing battery cells, the utility model adds multiple positive and negative anti-fooling devices to achieve adaptation to different connection methods and prevent installation errors. The specific technical solutions are as follows

[0005] A battery with multiple anti-fooling devices includes: a housing, a battery cell, and a cover plate; the battery cell is arranged in a cavity formed by the buckling of the housing and the cover plate; the battery cell is provided with a positive electrode plate and a negative electrode plate, and a slope is formed on one side of the end face of the negative electrode plate, so that the end face of the negative electrode plate is smaller than the end face of the positive electrode plate; it also includes a positive group connecting aluminum bar and a negative group connecting aluminum bar, the positive group connecting aluminum bar is adapted to the end face shape of the positive electrode plate, and the negative group connecting aluminum bar is adapted to the end face shape of the negative electrode plate; the positive group connecting aluminum bar is provided with an upward protruding positive electrode contact, and the negative group connecting aluminum bar is provided with an upward protruding negative electrode contact; the positive electrode contact is in the shape of a cuboid, and the negative electrode contact is in the shape of a cylinder; the inner side of the cover plate is provided with a positive electrode groove and a negative electrode groove, the inner diameter of the positive electrode groove is rectangular and is adapted to the shape of the positive electrode contact; the inner diameter of the negative electrode groove is circular and is adapted to the shape of the negative electrode contact; when the cover plate is buckled, the positive electrode contact is inserted into the positive electrode groove, and at the same time the negative electrode contact is inserted into the negative electrode groove

[0006] Preferably, a cover insulating pad is provided inside the cover plate, and a clamping tooth is provided at one end of the cover insulating pad; a housing insulating pad is provided inside the upper edge of the housing, and a clamping groove is provided on the side of the housing insulating pad corresponding to the clamping tooth. The clamping tooth and the clamping groove are engaged with each other to prevent the cover plate from being installed incorrectly.

[0007] Preferably, a positive protection ring is provided on the outer side of the cover plate corresponding to the positive electrode groove; a negative protection ring is provided on the outer side of the cover plate corresponding to the negative electrode groove; a positive electrode post is provided inside the positive protection ring; a negative electrode post is provided inside the negative protection ring; and a threaded hole is provided at the center of the positive electrode post and the negative electrode post.

[0008] Preferably, a positive mark is provided on the positive contact; a negative mark is provided on the negative contact.

[0009] Preferably, a positive mark is provided on the positive protection ring; a negative mark is provided on the negative protection ring.

[0010] Preferably, a positive mark is provided on the positive electrode post; a negative mark is provided on the negative electrode post.

[0011] Preferably, the shape of the cover insulating pad matches the structural shape inside the cover plate; the shape of the housing insulating pad matches the structural shape inside the upper edge of the housing.

[0012] The beneficial effects of the present utility model are as follows: The present utility model forms multiple anti-fooling devices on each component related to the positive and negative electrodes that may go wrong through methods such as differences in shape and structure, avoiding assembly errors of the electrode structure. At the same time, screw holes are provided inside the positive and negative electrode posts, enabling both laser welding and screw connection methods to improve the compatibility of series and parallel connection methods between different batteries. Description of the Drawings

[0013] The drawings described herein are used to provide a further understanding of the present utility model, and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0014] Figure 1A It is a three-dimensional structural schematic diagram of the battery of the present utility model;

[0015] Figure 1B It is a three-dimensional structural schematic diagram of the battery cell of the present utility model;

[0016] Figure 2A It is a structural schematic diagram of the connection of the positive electrode group to the aluminum row of the present utility model;

[0017] Figure 2BSchematic diagram of the structure of the aluminum bar connecting the negative electrode group of the present utility model;

[0018] Figure 3A Schematic diagram of the reverse side structure of the cover plate of the present utility model;

[0019] Figure 3B Schematic diagram of the front side structure of the cover plate of the present utility model;

[0020] Figure 3C Exploded structure diagram of the cover plate of the present utility model;

[0021] Figure 4A Schematic diagram of the structure when the cover plate of the present utility model is buckled with the outer shell 101;

[0022] Figure 4B For Figure 4A Local enlarged view of area A in Detailed implementation mode

[0023] In order to more clearly explain the overall concept of the present application, the following will be described in detail by way of examples in conjunction with the drawings in the specification.

[0024] As Figure 1A 、 Figure 1B shown, a battery 100 with multiple anti-fooling devices mainly includes an outer shell 101, a battery cell 102 and a cover plate 120. The battery cell 102 is arranged in a cavity formed by buckling the outer shell 101 and the cover plate 120; the battery cell 102 is provided with a positive electrode plate 103 and a negative electrode plate 104. One side of the end face of the negative electrode plate 104 forms an inclined surface 117, so that the end face of the negative electrode plate 104 is smaller than the end face of the positive electrode plate 103, so as to distinguish the negative electrode plate 104 and the positive electrode plate 103 in shape and visually.

[0025] The battery 100 further includes a positive electrode group connecting aluminum bar 105 and a negative electrode group connecting aluminum bar 106. The positive electrode group connecting aluminum bar 105 is adapted to the end face shape of the positive electrode plate 103, and the negative electrode group connecting aluminum bar 106 is adapted to the end face shape of the negative electrode plate 104, so that the positive electrode group connecting aluminum bar 105 and the negative electrode group connecting aluminum bar 106 are respectively adapted to the positive electrode plate 103 and the negative electrode plate 104 in shape without errors.

[0026] As Figure 2A and Figure 2B shown, the positive electrode group connecting aluminum bar 105 is provided with an upward protruding positive electrode contact 107, and the negative electrode group connecting aluminum bar 106 is provided with an upward protruding negative electrode contact 108; the positive electrode contact 107 is in the shape of a cuboid, and the negative electrode contact 108 is in the shape of a cylinder. A positive electrode mark "+" is provided on the positive electrode contact 107, and a negative electrode mark "-" is provided on the negative electrode contact 108.

[0027] As Figure 3A 、 3B, as shown in FIGS. 3C, an insulating gasket 129 is provided inside the cover plate 120, and the shape of the insulating gasket 129 of the cover plate is matched with the structure inside the cover plate 120. Inside the insulating gasket 129 of the cover plate, a positive sealing ring 131 and a negative sealing ring 132 are provided. Inside the positive sealing ring 131, a positive groove 123 is provided, and inside the negative sealing ring 132, a negative groove 124 is provided. The inner diameter of the positive groove 123 is rectangular and is adapted to the shape of the positive contact 107; the inner diameter of the negative groove 124 is circular and is adapted to the shape of the negative contact 108; when the cover plate 120 is buckled, the positive contact 107 is inserted into the positive groove 123, and at the same time, the negative contact 108 is inserted into the negative groove 124. Due to the different degrees of shape matching, the cover plate 120 will not have incorrect installation of the positive and negative poles.

[0028] It can also be seen from the figure that a positive protection ring 127 is provided outside the cover plate 120 corresponding to the positive groove 123, and a positive mark \"+\" is provided on the positive protection ring 127; a negative protection ring 128 is provided outside the cover plate 120 corresponding to the negative groove 124, and a negative mark \"-\" is provided on the negative protection ring 128. Inside the positive protection ring 127, a positive pole column 137 is provided, and a positive mark \"+\" is provided on the positive pole column 137; inside the negative protection ring 128, a negative pole column 138 is provided, and a negative mark \"-\" is provided on the negative pole column 138. In order to prevent welding errors caused by unclear identification of the positive and negative poles during the welding of the cover plate 120, the present utility model adds eye-catching positive and negative pole symbols at all positive and negative pole related components, so that the positions of the positive and negative poles can be clearly identified and welding errors can be prevented.

[0029] In addition, threaded holes 140 and 142 are respectively provided at the centers of the positive pole column 137 and the negative pole column 138. In this way, in addition to using laser welding to fix the aluminum busbar to the cell pole column, the aluminum busbar can also be fixed to the pole column by screw connection to realize the series and parallel connection of the cells.

[0030] As Figure 4A , 4B shown, one end of the insulating gasket 129 of the cover plate is provided with a locking tooth 121; inside the upper edge of the housing 101, a housing insulating gasket 125 is provided, and the shape of the housing insulating gasket 125 is matched with the inner structure of the upper edge of the housing 101. A card slot 122 is provided on the side of the housing insulating gasket 125 corresponding to the locking tooth 121, and the locking tooth 121 and the card slot 122 are engaged with each other. If the cover plate 120 is installed in the wrong direction, the locking tooth 121 and the card slot 122 will not be engaged, and the cover plate 120 cannot be perfectly buckled with the housing 101. The structure of the locking tooth 121 and the card slot 122 can prevent the cover plate 120 from being installed incorrectly again. The present utility model installs two layers of insulating gaskets, upper and lower, at the battery housing. This insulating gasket can realize the close fit of the cover plate 120 and the housing 101 insulating gasket, increase the sealing performance, and realize the double anti-fooling design of the positive and negative directions through the cooperation of the locking tooth 121 and the card slot 122.

[0031] The above examples are only embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. A battery (100) with a multiple anti-fooling device, characterized in that Comprising: A housing (101), an electric core (102) and a cover plate (120); The electric core (102) is arranged in a cavity formed by buckling the housing (101) and the cover plate (120); The electric core is provided with a positive electrode plate (103) and a negative electrode plate (104), and a slope is formed on one side of the end face of the negative electrode plate (104), so that the end face of the negative electrode plate (104) is smaller than the end face of the positive electrode plate (103); It further includes a positive electrode group connecting aluminum row (105) and a negative electrode group connecting aluminum row (106), the positive electrode group connecting aluminum row (105) is adapted to the shape of the end face of the positive electrode plate (103), and the negative electrode group connecting aluminum row (106) is adapted to the shape of the end face of the negative electrode plate (104); The positive electrode group connecting aluminum row (105) is provided with an upward protruding positive electrode contact point (107), and the negative electrode group connecting aluminum row (106) is provided with an upward protruding negative electrode contact point (108); the positive electrode contact point (107) is in the shape of a cuboid, and the negative electrode contact point (108) is in the shape of a cylinder; The inner side of the cover plate (120) is provided with a positive electrode groove (123) and a negative electrode groove (124), the inner diameter of the positive electrode groove (123) is rectangular and is adapted to the shape of the positive electrode contact point (107); the inner diameter of the negative electrode groove (124) is circular and is adapted to the shape of the negative electrode contact point (108); when the cover plate (120) is buckled, the positive electrode contact point (107) is inserted into the positive electrode groove (123), and at the same time the negative electrode contact point (108) is inserted into the negative electrode groove (124).

2. The battery (100) according to claim 1, characterized in that: The inner side of the cover plate (120) is provided with a cover plate insulating pad (129), and one end of the cover plate insulating pad (129) is provided with a locking tooth (121); The upper edge inside of the housing (101) is provided with a housing insulating pad (125), and a clamping groove (122) is provided on the side of the housing insulating pad (125) corresponding to the locking tooth (121), and the locking tooth (121) and the clamping groove (122) are engaged with each other to prevent the cover plate (120) from being installed wrongly.

3. The battery (100) according to claim 1, characterized in that: A positive electrode protection ring (127) is provided on the outer side of the cover plate (120) corresponding to the positive electrode groove (123); A negative electrode protection ring (128) is provided on the outer side of the cover plate (120) corresponding to the negative electrode groove (124); A positive electrode terminal (137) is arranged inside the positive electrode protection ring (127); A negative electrode terminal (138) is arranged inside the negative electrode protection ring (128); Threaded holes are arranged at the centers of the positive electrode terminal (137) and the negative electrode terminal (138).

4. The battery (100) according to claim 1, characterized in that: A positive electrode mark is provided on the positive electrode contact point (107); A negative electrode mark is provided on the negative electrode contact point (108).

5. The battery (100) according to claim 3, characterized in that: A positive electrode mark is provided on the positive electrode protection ring (127); A negative electrode mark is provided on the negative electrode protection ring (128).

6. The battery (100) according to claim 3, characterized in that: The positive electrode terminal (137) is provided with a positive electrode mark; The negative electrode terminal (138) is provided with a negative electrode mark.

7. The battery (100) according to claim 2, characterized in that: The shape of the cover plate insulating pad (129) is mutually matched with the inner structural shape of the cover plate (120); The shape of the housing insulating pad (125) is mutually matched with the inner structural shape of the upper edge of the outer housing (101).

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