CN220066036U - Batteries and battery devices - Google Patents

Abstract

The utility model relates to the technical field of batteries and discloses a battery and a battery device, wherein the battery comprises a current collecting disc and a battery core, and the current collecting disc comprises a first connecting part and a second connecting part; the battery cell comprises a battery cell body and a tab, the tab comprises a first tab and a second tab, the polarities of the first tab and the second tab are the same, the first tab and the second tab are led out from one end of the battery cell body close to the current collecting disc, the second tab is bent towards one side close to the first tab, and one end of the second tab far away from the battery cell body is close to the current collecting disc relative to one end of the first tab far away from the battery cell body; the first connecting part is close to the battery cell body relative to the second connecting part, one end of the first tab, which is far away from the battery cell body, is connected with the first connecting part, and one end of the second tab, which is far away from the battery cell body, is connected with the second connecting part. The lug of the battery is connected with the current collecting disc more firmly and has higher flatness, so that the battery has better service performance.

Description

Batteries and battery devices

Technical field

The present disclosure relates to the field of battery technology, and in particular, to a battery and a battery device.

Background technique

Currently, in the field of battery technology, due to the height difference between the tabs after bending, the connection between the tabs and the current collecting plate of the battery is not firm and prone to loosening. Moreover, due to the height difference between the tabs, the flatness of the connection between the tabs and the current collecting plate is poor, resulting in a weak overcurrent capability, which affects the performance of the battery.

It should be noted that the information disclosed in the above background section is only used to enhance understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to those of ordinary skill in the art.

Utility model content

The purpose of this disclosure is to overcome the shortcomings of the above-mentioned related art that the connection between the pole tab and the current collecting plate is not firm and the flatness of the connection between the pole tab and the current collecting plate is poor, and to provide a stronger and smoother connection between the pole tab and the current collecting plate. Higher temperature batteries and battery devices including the batteries.

According to one aspect of the present disclosure, a battery is provided, including:

The collecting plate includes a first connecting part and a second connecting part;

The battery core includes a battery core body and pole tabs. The pole tabs include a first pole tab and a second pole tab. The first pole tab and the second pole tab have the same polarity, and both are close to the collector from the battery core body. One end of the flow plate is drawn out, the second pole tab is bent toward the side closer to the first pole tab, and the end of the second pole tab away from the battery core body is closer to the end of the first pole tab away from the battery core body. collecting tray;

Wherein, the first connection part is close to the battery core body relative to the second connection part, an end of the first tab far away from the battery core body is connected to the first connection part, and an end of the second tab far away from the battery core body is connected to the second connection part. external connection.

In the battery provided by the present disclosure, on the one hand, the tab may include a first tab and a second tab. The first tab and the second tab have the same polarity, and both are close to the current collector from the cell body. One end of the disk is drawn out, the second pole tab is bent toward the side closer to the first pole tab, and the end of the second pole tab away from the battery core body is closer to the collector than the end of the first pole tab away from the battery core body. Dishes. The collecting plate may include a first connection part and a second connection part. By making the first connection part closer to the battery core body relative to the second connection part, the distance between the first connection part and the end of the first tab away from the battery core body can be made closer, thereby facilitating the connection between the first connection part and the second connection part. One pole tab is connected, so that the first connecting part and the first pole tab are connected more firmly. In addition, the second connection part is further away from the battery core body than the first connection part, so as to facilitate the connection between the second connection part and the second pole tab, so that the second connection part is connected to the second pole tab. more stable. In this way, the problem of detachment between the tabs and the current collecting plate due to unstable connection can be avoided, thereby improving the performance of the battery.

On the other hand, since there is a height difference between the second pole tab and the first pole tab, when the distance between the first connection part and the battery core body is the same as the distance between the second connection part and the battery core body, At the same time, it will cause the problem of poor flatness in the connection between the pole tab and the current collecting plate, thereby affecting the flow capacity between the pole tab and the current collecting plate. Therefore, by making the second connection part away from the battery core body and the first connection part close to the battery core body, the present disclosure can make the distance between the first connection part and the battery core body the same as the distance between the first tab and the battery core body. The height of one end is matched, and the distance between the second connecting part and the battery core body is matched with the height of one end of the second tab away from the battery core body. Therefore, it can effectively ensure the flatness of the connection between the tabs and the current collecting plate, ensure the overcurrent capacity between the tabs and the current collecting plate, and further improve the performance of the battery.

According to another aspect of the present disclosure, a battery device is provided, including:

A box body, the box body has a receiving cavity;

A plurality of batteries are arranged in the accommodation cavity, and the batteries are the above-mentioned batteries.

In the battery device provided by the present disclosure, on the one hand, the tabs may include a first tab piece and a second tab piece. The first tab piece and the second tab piece have the same polarity, and both are close to the collector from the battery core body. One end of the flow plate is drawn out, the second pole tab is bent toward the side closer to the first pole tab, and the end of the second pole tab away from the battery core body is closer to the end of the first pole tab away from the battery core body. Collection tray. The collecting plate may include a first connection part and a second connection part. By making the first connection part closer to the battery core body relative to the second connection part, the distance between the first connection part and the end of the first tab away from the battery core body can be made closer, thereby facilitating the connection between the first connection part and the second connection part. One pole tab is connected, so that the first connecting part and the first pole tab are connected more firmly. In addition, the second connection part is further away from the battery core body than the first connection part, so as to facilitate the connection between the second connection part and the second pole tab, so that the second connection part is connected to the second pole tab. more stable. In this way, the problem of detachment between the tabs and the current collecting plate due to unstable connection can be avoided, thereby improving the performance of the battery and further improving the performance of the battery device.

On the other hand, since there is a height difference between the second pole tab and the first pole tab, when the distance between the first connection part and the battery core body is the same as the distance between the second connection part and the battery core body, At the same time, it will cause the problem of poor flatness in the connection between the pole tab and the current collecting plate, thereby affecting the flow capacity between the pole tab and the current collecting plate. Therefore, by making the second connection part away from the battery core body and the first connection part close to the battery core body, the present disclosure can make the distance between the first connection part and the battery core body the same as the distance between the first tab and the battery core body. The height of one end is matched, and the distance between the second connecting part and the battery core body is matched with the height of one end of the second tab away from the battery core body. Therefore, the flatness of the connection between the tab and the current collecting plate can be effectively ensured, and the overcurrent capability between the tab and the current collecting plate can be ensured, which further improves the performance of the battery and further improves the performance of the battery device.

It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and do not limit the present disclosure.

Description of the drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic cross-sectional structural diagram of an exemplary embodiment of a battery of the present disclosure.

FIG. 2 is a schematic top structural view of an exemplary embodiment of the battery cell body of the present disclosure.

Figure 3 is a schematic cross-sectional structural diagram of another exemplary embodiment of a battery of the present disclosure.

Figure 4 is a schematic cross-sectional structural diagram of another exemplary embodiment of a battery of the present disclosure.

Figure 5 is a schematic cross-sectional structural diagram of yet another exemplary embodiment of a battery of the present disclosure.

Figure 6 is a schematic cross-sectional structural diagram of yet another exemplary embodiment of a battery of the present disclosure.

FIG. 7 is a schematic structural diagram of an exemplary embodiment of the battery device of the present disclosure.

Explanation of reference symbols:

1. Battery; 11. Current collecting plate; 111. First connection part; 112. Second connection part; 113. Transition part; 12. Battery core; 13. Battery core body; 131. First area; 132. Second Area; 14, pole tab; 141, first pole tab; 142, second pole tab; 15, wound battery core; 151, central axis; 16, battery case; 161, cover plate; 162, side plate ; 163. Bottom plate; 164. Accommodation space; 17. Pole;

2. Box; 21. Accommodation cavity;

X, first direction; Y, second direction; Z, third direction.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments. To those skilled in the art. The same reference numerals in the drawings indicate the same or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

Although relative terms, such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience. For example, according to the drawings, direction of the example described. It will be understood that if the icon device were turned upside down, components described as "on top" would become components as "on bottom". When a structure is "on" another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" placed on the other structure, or that the structure is "indirectly" placed on the other structure through another structure. on other structures.

The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "include" and "have" are used to indicate an open-ended are inclusive and mean that there may be additional elements/components/etc. in addition to those listed; the terms "first", "second", "third" etc. are only Used as a marker, not a limit on the number of its objects.

In this application, unless otherwise clearly stated and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral body; it can be a direct connection or a detachable connection. Can be connected indirectly through intermediaries. "And/or" is just an association relationship that describes related objects. It means that there can be three relationships. For example, A and/or B can mean: A alone exists, A and B exist simultaneously, and B alone exists. situation. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

Referring to FIGS. 1 to 6 , example embodiments of the present disclosure provide a battery 1 . The battery 1 includes a current collecting plate 11 and a battery cell 12 . The current collecting plate 11 includes a first connecting part 111 and a second connecting part 112 ; The battery core 12 includes a battery core body 13 and tabs 14. The tabs 14 include a first tab 141 and a second tab 142. The first tab 141 and the second tab 142 have the same polarity, and They are all drawn out from one end of the cell body 13 close to the current collecting plate 11 , the second tab 142 is bent toward the side close to the first tab 141 , and the end of the second tab 142 away from the cell body 13 faces each other. The end of the first tab 141 away from the cell body 13 is close to the current collecting plate 11; the first connecting portion 111 is close to the cell body 13 relative to the second connecting portion 112, and the first tab 141 is away from the cell body. One end of 13 is connected to the first connecting part 111 , and an end of the second tab 142 away from the cell body 13 is connected to the second connecting part 112 .

In the battery 1 provided by the present disclosure, on the one hand, the tab 14 may include a first tab 141 and a second tab 142. The first tab 141 and the second tab 142 have the same polarity, and both are from One end of the battery core body 13 is drawn out close to the current collecting plate 11 , the second pole tab 142 is bent toward the side close to the first pole tab 141 , and the end of the second pole tab 142 away from the battery core body 13 is opposite to the first pole tab 142 . One end of the pole piece 141 away from the cell body 13 is close to the current collecting plate 11 . The collecting plate 11 may include a first connecting part 111 and a second connecting part 112 . By making the first connection part 111 closer to the battery core body 13 relative to the second connection part 112 , the distance between the first connection part 111 and the end of the first tab 141 away from the battery core body 13 can be made closer, thereby facilitating The first connecting part 111 is connected to the first tab piece 141 so that the first connecting part 111 and the first tab piece 141 are connected more firmly. Moreover, the second connection part 112 is further away from the battery core body 13 than the first connection part 111 , so as to facilitate the connection between the second connection part 112 and the second tab 142 , so that the second connection part 112 and The second pole tab 142 is connected more firmly. In this way, the problem of detachment between the tabs 14 and the current collecting plate 11 due to unstable connection can be avoided, thereby improving the performance of the battery 1 .

On the other hand, since there is a height difference between the second pole tab 142 and the first pole tab 141, when the distance between the first connection part 111 and the cell body 13 and the distance between the second connection part 112 and the cell body 13 When the distances between the pole tabs 13 are the same, the flatness of the connection between the pole tabs 14 and the current collecting plate 11 will be poor, thereby affecting the current flow capacity between the pole tabs 14 and the current collecting plate 11 . Therefore, the present disclosure can make the distance between the first connection part 111 and the battery body 13 closer to the first tab by making the second connection part 112 away from the battery core body 13 and the first connection part 111 close to the battery core body 13 . The height of the end of the piece 141 away from the cell body 13 matches, and the distance between the second connecting portion 112 and the cell body 13 matches the height of the end of the second tab piece 142 away from the cell body 13 . Therefore, the flatness of the connection between the tab 14 and the current collecting plate 11 can be effectively ensured, and the overcurrent capability between the tab 14 and the current collecting plate 11 can be ensured, further improving the performance of the battery 1 .

In one embodiment, the orthographic projection of the first tab 141 on the cell body 13 and the orthographic projection of the second tab 142 on the cell body 13 at least partially overlap, so that the first tab 141 Support at least part of the second pole tab 142, so that the first pole tab 141 can be used to provide a certain supporting force to the second pole tab 142 to prevent the second pole tab 142 from moving toward the side close to the first pole tab 141. The side is bent too much to facilitate the connection between the second tab piece 142 and the second connecting portion 112 .

In one embodiment, the end of the first tab 141 away from the cell body 13 can be welded to the first connection portion 111 , and the end of the second tab 142 away from the cell body 13 can be welded to the second connection portion 112 . This arrangement not only ensures the connection strength between the end of the first tab 141 away from the battery core body 13 and the first connection part 111 , but also ensures the connection strength between the end of the second tab 142 away from the battery core body 13 and the second connection part. The connection strength between 112 prevents the first tab 141 and the second tab 142 from falling off during use of the battery 1 . At the same time, it can also ensure a high electrical transmission efficiency between the end of the first tab 141 away from the battery core body 13 and the first connection part 111, and the end of the second tab 142 away from the battery core body 13 and the first connection part 111. There is a high electrical transmission efficiency between the two connecting parts 112, ensuring that the battery 1 has good performance.

But it is not limited to this. The end of the first tab 141 away from the battery core body 13 and the first connecting part 111 can also be connected without welding. The connecting portion 112 may also be connected without welding, or may be connected by riveting, etc., which are all within the scope of the present disclosure.

In one embodiment of the present disclosure, as shown in FIGS. 1 to 6 , the battery core 12 may be a wound battery core 15 . That is, the battery core 12 may include a winding unit composed of a first electrode sheet, a separator sheet, and a second electrode sheet stacked in sequence. During the manufacturing process of the battery core 12, the winding unit can be wound on the winding mandrel. After completing the winding of the battery core 12, the winding mandrel can be pulled out from the battery core 12.

When the winding mandrel is pulled out from the battery core 12, a winding center hole is formed where the winding mandrel originally was. Since the battery core 12 may expand during daily use of the battery 1, the winding center hole can provide expansion space for the battery core 12 to avoid damage to the battery 1 due to expansion of the battery core 12. In addition, the winding center hole can also be used to accommodate electrolyte, so that more electrolyte can be poured into the battery 1, thereby improving the performance of the battery 1.

It should be noted that the present disclosure does not limit the diameter of the winding center hole, and can be selected and set according to actual needs, which are all within the protection scope of the present disclosure.

In one embodiment, the polarity of the first electrode sheet and the second electrode sheet may be different, and the above-mentioned tab 14 may be connected to the first electrode sheet and/or the second electrode sheet. That is: when the first electrode piece is the positive electrode of the battery core 12, the second electrode piece can be the negative electrode of the battery core 12, and the first tab piece 141 and the second tab piece 142 can both be connected to the first electrode piece to form The positive tab 14 of the battery 1, or the first tab 141 and the second tab 142 can both be connected to the second electrode tab to form the negative tab 14 of the battery 1; when the first electrode tab is the negative electrode of the battery core 12 , the second electrode piece can be the positive electrode of the battery core 12 , the first tab piece 141 and the second tab piece 142 can both be connected to the first electrode piece to form the negative electrode tab 14 of the battery 1 , or the first tab piece 141 and the second tab 142 may both be connected with the second electrode tab to form the positive tab 14 of the battery 1 .

In one embodiment, two tabs 14 may be provided, one tab 14 may be connected to the first electrode sheet, and the other tab 14 may be connected to the second electrode sheet. That is, when the first electrode piece is the positive electrode of the battery core 12 and the second electrode piece is the negative electrode of the battery core 12, the first tab 141 and the second tab 142 of one of the tabs 14 can both be connected to the first tab. The electrode tabs are connected to form the positive tab 14 of the battery 1, and the first tab 141 and the second tab 142 of the other tab 14 can both be connected to the second electrode tab to form the negative tab 14 of the battery 1; when the When one electrode piece is the negative electrode of the battery core 12 and the second electrode piece is the positive electrode of the battery core 12, the first tab 141 and the second tab 142 of one of the tabs 14 can both be connected to the first electrode tab. To form the negative tab 14 of the battery 1 , the first tab 141 and the second tab 142 of the other tab 14 can both be connected to the second electrode tab to form the positive tab 14 of the battery 1 .

In one embodiment, as shown in FIGS. 1 to 6 , the first tab 141 can be close to the central axis 151 of the wound battery core 15 relative to the second tab 142 , and the first connecting portion 111 is relative to the second tab 142 . The two connecting parts 112 are close to the central axis 151 of the wound battery core 15 . With this arrangement, the first tab 141 and the first connecting portion 111 are both close to the central axis 151 of the wound battery core 15 , and the second tab 142 and the second connecting portion 112 are both far away from the center of the wound battery core 15 The axis 151 can avoid the intersection between the first tab 141 connected to the first connecting part 111 and the second tab 142 connected to the second connecting part 112 to affect the relationship between the tab 14 and the current collecting plate 11 . overcurrent capability.

In one embodiment, as shown in FIGS. 1 and 2 , a first region 131 and a second region 132 may be provided at one end of the cell body 13 facing the current collecting plate 11 . The first area 131 can be closer to the central axis 151 of the wound battery core 15 relative to the second area 132 , the first tab 141 can protrude from the battery core body 13 located in the first area 131 , and the second tab 142 can Extends from the cell body 13 located in the second area 132 . The orthographic projection of the first region 131 on the current collecting plate 11 may at least overlap with the first connecting part 111 , and the orthographic projection of the second region 132 on the collecting plate 11 may at least overlap with the second connecting part 112 .

With this arrangement, the position of the first region 131 can correspond to the position of the first connecting portion 111 , and the position of the second region 132 can correspond to the position of the second connecting portion 112 , thereby further avoiding contact with the first connecting portion 111 The intersection between the connected first tab piece 141 and the second tab piece 142 connected to the second connecting portion 112 affects the current flow capacity between the tab 14 and the current collecting plate 11 . At the same time, such an arrangement can also make the distance between the first tab piece 141 and the first connecting portion 111 closer in the first direction X, and the distance between the second tab piece 142 and the second connecting portion 112 in the first direction X. The distance on It should be noted that the above-mentioned first direction X may be the direction in which the first area 131 points to the second area 132 .

In one embodiment, referring to FIGS. 4 to 6 , the tab 14 may include a plurality of first tabs 141 and a plurality of second tabs 142 . Each of the plurality of first tabs 141 and the plurality of second tabs 142 may be arranged along the first direction X. With this arrangement, the number of first tabs 141 and second tabs 142 connected to the current collecting plate 11 can be increased, the overcurrent capacity between the tabs 14 and the current collecting plate 11 can be improved, and the performance of the battery 1 can be ensured. .

The present disclosure does not limit the number of the plurality of first pole tabs 141 and the plurality of second pole tabs 142, and they can be selected and set according to actual needs, which are all within the protection scope of the present disclosure.

In one embodiment of the present disclosure, as shown in FIG. 6 , among any two adjacent first pole tabs 141 , the first pole tab 141 that is far away from the central axis 151 of the wound cell 15 is away from the cell body. One end of 13 can be farther away from the battery body 13 than the end of the first tab 141 which is close to the central axis 151 of the wound battery core 15 and is away from the battery core body 13 . The distance between the side of the first connecting portion 111 close to the cell body 13 and the end of the cell body 13 facing the current collecting plate 11 may increase along the third direction Z. The third direction Z is the direction in which the first connecting part 111 points to the second connecting part 112 .

With this arrangement, the distance between the first connecting part 111 and the battery core body 13 can match the height of each first tab 141 , thus ensuring the connection between each first tab 141 and the first connecting part 111 The flatness ensures the overcurrent capability of each first tab piece 141 and the first connection part 111, further improving the practical performance of the battery 1.

In one embodiment, the first direction

In one embodiment of the present disclosure, referring to FIGS. 3 to 6 , the thickness H1 of the first connecting part 111 in the second direction Y may be smaller than the thickness H2 of the second connecting part 112 in the second direction Y. The second direction Y is the direction in which the current collecting plate 11 points to the cell body 13 . With this arrangement, the first connecting portion 111 can be made thinner, which facilitates the connection between the first connecting portion 111 and the first tab piece 141 . Moreover, when the first connecting part 111 is thin, it will deform close to the cell body 13 , so that the distance between the first connecting part 111 and the first tab 141 is closer, thus making the first connection The connection between the part 111 and the first tab piece 141 is more convenient. At the same time, when the first connecting part 111 is welded to the first tab 141, since the first connecting part 111 is thin, the welding efficiency can be improved and the welding energy consumption can be saved.

The ratio of the thickness H1 of the first connecting part 111 in the second direction Y to the thickness H2 of the second connecting part 112 in the second direction Y may be greater than or equal to 0.1 and less than 1. For example, the ratio of the thickness H1 of the first connecting part 111 to the thickness H2 of the second connecting part 112 may be 0.1, 0.3, 0.5, 0.7, 0.9, etc.

If the ratio of the thickness H1 of the first connecting part 111 in the second direction Y to the thickness H2 of the second connecting part 112 in the second direction Y is too large, the first connecting part 111 will be thicker, and the second connecting part 111 will not be able to increase the thickness of the first connecting part 111 in the second direction Y. The welding efficiency between a connecting part 111 and the first tab piece 141 cannot save welding energy consumption. At the same time, the thicker first connecting portion 111 will not deform close to the battery core body 13 , and thus cannot further reduce the difficulty of connection between the first connecting portion 111 and the first tab 141 . If the ratio of the thickness H1 of the first connecting part 111 in the second direction Y to the thickness H2 of the second connecting part 112 in the second direction Y is too small, the structural strength of the first connecting part 111 will be weak, making it Damage easily occurs, thereby increasing the probability of battery 1 being damaged.

Therefore, the present disclosure can reduce the thickness of the first connecting portion 111 by setting the ratio of the thickness H1 of the first connecting portion 111 in the second direction Y to the thickness H2 of the second connecting portion 112 in the second direction Y within the above range. The welding efficiency between 111 and the first tab piece 141 saves welding energy consumption, and can make the connection between the first connecting part 111 and the first tab piece 141 more convenient. At the same time, it can also ensure that the first connection part 111 has high structural strength, reducing the probability of damage to the battery 1 .

In one embodiment, the thickness H1 of the first connecting portion 111 in the second direction Y may be greater than or equal to 0.05 mm and less than or equal to 0.3 mm. Such an arrangement can make the connection between the first connecting part 111 and the first tab piece 141 more convenient. At the same time, it is also possible to avoid the thickness H1 of the first connection part 111 being too thin, thereby ensuring that the first connection part 111 has high structural strength and reducing the probability of damage to the battery 1 .

The thickness of the second connecting portion 112 in the second direction Y may be greater than or equal to 0.15 mm and less than or equal to 0.5 mm. With this arrangement, the second connecting part 112 can be prevented from being too thin, thereby providing supporting force to the first connecting part 111 and improving the structural strength of the collecting plate 11 . In addition, the second connecting portion 112 can be prevented from being too thick, thereby ensuring that the second connecting portion 112 and the second tab piece 142 can be easily welded.

In one embodiment, the width W1 of the first connecting portion 111 in the third direction Z may be greater than or equal to 6 mm and less than or equal to 16 mm. For example, the width W1 of the first connecting part 111 in the third direction Z may be 6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, etc.

Such an arrangement can ensure that the width W1 of the first connecting portion 111 in the third direction Z is large enough to facilitate the connection of the first tab piece 141 . At the same time, it can also avoid the problem that the width W1 of the first connecting part 111 in the third direction Z is too large, causing the second connecting part 112 to be too small.

The width W2 of the second connecting portion 112 in the third direction Z may be greater than or equal to 10 mm and less than or equal to 50 mm. For example, the width W2 of the second connecting part 112 in the third direction Z may be 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, etc.

Such an arrangement ensures that the width W2 of the first connecting part 111 in the third direction Z is large enough to facilitate the connection of the second tab 142 , and also ensures that the second connecting part 112 can provide the first connecting part 111 with Sufficient support. At the same time, it can also avoid the problem that the width W2 of the second connecting part 112 in the third direction Z is too large, causing the first connecting part 111 to be too small.

In one embodiment, as shown in FIGS. 5 and 6 , the collecting plate 11 may further include a transition portion 113 . The transition part 113 may be located between the first connection part 111 and the second connection part 112 and connected with the first connection part 111 and the second connection part 112 . The thickness of the end of the transition portion 113 connected to the first connecting portion 111 in the second direction Y can be the same as that of the first connecting portion 111 . The thickness of the end of the transition portion 113 connected to the second connecting portion 112 in the second direction Y can be the same as that of the first connecting portion 111 . It may be the same as the second connecting part 112 , and the thickness of the transition part 113 in the second direction Y may increase along the direction of the third direction Z. By providing the transition part 113, the concentrated stress between the first connection part 111 and the second connection part 112 can be reduced, and the probability of damage occurring at the connection between the first connection part 111 and the second connection part 112 can be reduced.

It should be noted that when the thickness H1 of the first connecting part 111 in the second direction Y is uneven, the thickness of the end of the transition part 113 connected to the first connecting part 111 in the second direction Y may be the same as the thickness of the first connecting part 111 in the second direction Y. The thickness H2 of the end of the transition portion 111 close to the transition portion 113 in the second direction Y is the same; when the thickness H2 of the second connecting portion 112 in the second direction Y is uneven, the end of the transition portion 113 connected to the second connecting portion 112 is in the second direction Y. The thickness in the two directions Y may be the same as the thickness in the second direction Y of the end of the second connecting portion 112 close to the transition portion 113 .

In one embodiment, the thickness of the transition portion 113 in the second direction Y may increase uniformly along the third direction Z. Such an arrangement can further reduce the concentrated stress between the first connection part 111 and the second connection part 112 , improve the overcurrent uniformity of the transition part 113 , and avoid the problem of melting of the transition part 113 .

In other embodiments, the thickness of the transition part 113 in the second direction Y may also increase unevenly along the third direction Z. For example, the transition part 113 may also be arc-shaped, wavy, etc., which is also protected by the present disclosure. within the range.

In one embodiment of the present disclosure, as shown in FIGS. 1 and 3 to 6 , the battery 1 may further include a battery case 16 . The battery case 16 may include a cover plate 161 , side plates 162 and a bottom plate 163 . The cover plate 161 , the side plates 162 and the bottom plate 163 may enclose a receiving space 164 . That is, the cover plate 161 and the bottom plate 163 can be arranged oppositely, and a side plate 162 can be connected between the cover plate 161 and the bottom plate 163 so that the cover plate 161 , the side plate 162 and the bottom plate 163 enclose the accommodation space 164 . The above-mentioned battery core 12 and current collecting plate 11 may be disposed in the accommodation space 164 .

In one embodiment, the battery 1 may be a cylindrical battery 1, that is, the battery housing 16 may be configured as a cylindrical shape, the cover plate 161 and the bottom plate 163 may both be configured as a circular shape, and the side plate 162 may be configured as a cylindrical surface. By arranging the battery case 16 as a cylinder, when the battery core 12 generates heat and expands, since the side plate 162 of the battery case 16 is a cylindrical surface, the force on the battery case 16 is more uniform, which can offset it from all directions. The expansion force generated by the heat generated by the battery core 12 can reduce the probability of expansion of the battery core 12 and thereby reduce the probability of expansion of the entire battery 1 .

However, it is not limited to this, and the battery 1 may also be a rectangular parallelepiped battery 1 . When the battery 1 is a rectangular parallelepiped battery 1, the battery case 16 can be configured as a rectangular parallelepiped, the cover plate 161 and the bottom plate 163 can both be configured as a rectangle, and there can be multiple side plates 162. The multiple side plates 162 are arranged around the bottom plate 163 and connected with the cover. Board 161 is connected. When the battery 1 is a rectangular parallelepiped battery 1, its energy density is greater than that of the cylindrical battery 1.

In one embodiment, the battery case 16 may be provided with a through hole, and the through hole may be located on the cover 161 , but is not limited thereto, and the through hole may also be located at other locations on the battery case 16 . The battery 1 may also include a pole 17 , which may penetrate the through hole and be connected to the current collecting plate 11 to form an electrode of the battery 1 .

Another example embodiment of the present disclosure provides a battery device. Referring to FIG. 7 , the battery device may include a box 2 and a plurality of batteries 1 . The box 2 may have a receiving cavity 21 , a plurality of batteries 1 may be disposed in the receiving cavity 21 , and the battery 1 may be the battery 1 described above.

It should be noted that since the specific structure of the battery 1 has been described in detail above, the specific structure of the battery 1 will not be described again here. Moreover, in addition to the battery 1 box and the battery 1, the battery device also includes other necessary components and components, such as circuit boards, control components, etc. Those skilled in the art can make corresponding adjustments according to the specific usage requirements of the battery device. Supplementary information will not be repeated here.

Referring to FIGS. 1 to 7 , in the battery device provided by the present disclosure, on the one hand, the tab 14 may include a first tab 141 and a second tab 142 . 142 have the same polarity, and are drawn from one end of the cell body 13 close to the current collecting plate 11, and the second pole tab 142 is bent toward the side close to the first pole tab 141, and the second pole tab 142 The end far away from the cell body 13 is close to the current collecting plate 11 relative to the end far away from the cell body 13 of the first tab piece 141 . The collecting plate 11 may include a first connecting part 111 and a second connecting part 112 . By making the first connection part 111 closer to the battery core body 13 relative to the second connection part 112 , the distance between the first connection part 111 and the end of the first tab 141 away from the battery core body 13 can be made closer, thereby facilitating The first connecting part 111 is connected to the first tab piece 141 so that the first connecting part 111 and the first tab piece 141 are connected more firmly. Moreover, the second connection part 112 is further away from the battery core body 13 than the first connection part 111 , so as to facilitate the connection between the second connection part 112 and the second tab 142 , so that the second connection part 112 and The second pole tab 142 is connected more firmly. In this way, the problem of detachment between the tabs 14 and the current collecting plate 11 due to unstable connection can be avoided, thereby improving the performance of the battery 1 and further improving the performance of the battery device.

On the other hand, since there is a height difference between the second pole tab 142 and the first pole tab 141, when the distance between the first connection part 111 and the cell body 13 and the distance between the second connection part 112 and the cell body 13 When the distances between the pole tabs 13 are the same, the flatness of the connection between the pole tabs 14 and the current collecting plate 11 will be poor, thereby affecting the current flow capacity between the pole tabs 14 and the current collecting plate 11 . Therefore, the present disclosure can make the distance between the first connection part 111 and the battery body 13 closer to the first tab by making the second connection part 112 away from the battery core body 13 and the first connection part 111 close to the battery core body 13 . The height of the end of the piece 141 away from the cell body 13 matches, and the distance between the second connecting portion 112 and the cell body 13 matches the height of the end of the second tab piece 142 away from the cell body 13 . Therefore, the flatness of the connection between the tabs 14 and the current collecting plate 11 can be effectively ensured, and the overcurrent capability between the tabs 14 and the current collecting plate 11 can be ensured, further improving the performance of the battery 1 and further improving the battery performance. device performance.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure that follow the general principles of the disclosure and include common knowledge or customary technical means in the technical field that are not disclosed in the disclosure. . It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (14)

1. A battery, comprising:

a current collecting plate (11) including a first connection portion (111) and a second connection portion (112);

the battery cell (12) comprises a battery cell body (13) and a tab (14), wherein the tab (14) comprises a first tab (141) and a second tab (142), the polarities of the first tab (141) and the second tab (142) are the same, the first tab and the second tab are led out from one end, close to the current collecting disc (11), of the battery cell body (13), the second tab (142) is bent towards one side, close to the first tab (141), and one end, far away from the battery cell body (13), of the second tab (142) is close to the current collecting disc (11) relative to one end, far away from the first tab (141), of the battery cell body (13);

the first connecting portion (111) is close to the battery core body (13) relative to the second connecting portion (112), one end, away from the battery core body (13), of the first tab (141) is connected with the first connecting portion (111), and one end, away from the battery core body (13), of the second tab (142) is connected with the second connecting portion (112).

2. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

the orthographic projection of the first tab (141) on the cell body (13) at least partially overlaps the orthographic projection of the second tab (142) on the cell body (13) so that the first tab (141) supports at least part of the second tab (142).

3. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

the battery cell (12) is a winding battery cell (15), the first tab (141) is close to a central axis (151) of the winding battery cell (15) relative to the second tab (142), and the first connection portion (111) is close to the central axis (151) of the winding battery cell (15) relative to the second connection portion (112).

4. The battery of claim 3, wherein the battery is provided with a battery cell,

a first region (131) and a second region (132) are arranged at one end of the battery cell body (13) facing the current collecting disc (11), the first region (131) is close to a central shaft (151) of the winding battery cell (15) relative to the second region (132), the first tab (141) extends out of the battery cell body (13) located in the first region (131), and the second tab (142) extends out of the battery cell body (13) located in the second region (132);

the orthographic projection of the first region (131) on the collecting tray (11) at least overlaps with the first connection part (111); the orthographic projection of the second region (132) on the collecting plate (11) at least overlaps the second connection (112).

5. The battery of claim 4, wherein the battery is provided with a plurality of electrodes,

the tab (14) comprises a plurality of first tab pieces (141) and a plurality of second tab pieces (142), and the plurality of first tab pieces (141) and the plurality of second tab pieces (142) are arranged along a first direction;

wherein the first direction is a direction in which the first region (131) points to the second region (132).

6. The battery according to any one of claim 1 to 5, wherein,

the thickness of the first connection portion (111) in the second direction is smaller than the thickness of the second connection portion (112) in the second direction;

the second direction is the direction in which the current collecting disc (11) points to the battery cell body (13).

7. The battery of claim 6, wherein the battery is configured to provide the battery with a battery cell,

a ratio of a thickness of the first connection portion (111) in the second direction to a thickness of the second connection portion (112) in the second direction is 0.1 or more and less than 1.

8. The battery of claim 7, wherein the battery is configured to provide the battery with a battery cell,

the thickness of the first connecting portion (111) in the second direction is 0.05mm or more and 0.3mm or less;

the thickness of the second connecting portion (112) in the second direction is 0.15mm or more and 0.5mm or less.

9. The battery of claim 6, wherein the battery is configured to provide the battery with a battery cell,

the width of the first connection part (111) in the third direction is more than or equal to 6mm and less than or equal to 16mm;

the width of the second connecting portion (112) in the third direction is 10mm or more and 50mm or less;

wherein the third direction is a direction in which the first connection portion (111) points to the second connection portion (112).

10. The battery of claim 6, wherein the battery is configured to provide the battery with a battery cell,

the collecting tray (11) further comprises:

a transition portion (113) located between the first connection portion (111) and the second connection portion (112) and connected to the first connection portion (111) and the second connection portion (112), a thickness of an end of the transition portion (113) connected to the first connection portion (111) in the second direction being the same as the first connection portion (111), a thickness of an end of the transition portion (113) connected to the second connection portion (112) in the second direction being the same as the second connection portion (112), and a thickness of the transition portion (113) in the second direction increasing in a third direction;

wherein the third direction is a direction in which the first connection portion (111) points to the second connection portion (112).

11. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

one end of the first tab (141) far away from the battery core body (13) is welded with the first connecting part (111);

and one end, far away from the battery cell body (13), of the second lug (142) is welded with the second connecting part (112).

12. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

the battery further includes:

the battery shell (16) comprises a cover plate (161), side plates (162) and a bottom plate (163), wherein an accommodating space (164) is formed by the cover plate (161), the side plates (162) and the bottom plate (163), and the battery core (12) and the current collecting disc (11) are arranged in the accommodating space (164).

13. The battery of claim 11, wherein the battery is configured to provide the battery with a battery cell,

the battery is a cylindrical battery.

14. A battery device, characterized by comprising:

a case (2), the case (2) having a housing chamber (21);

a plurality of batteries provided in the housing chamber (21), and the batteries are the batteries according to any one of claims 1 to 13.