Battery, battery pack comprising same and electric equipment

Abstract

The utility model relates to the technical field of batteries, and particularly provides a battery, a battery pack comprising the same and electric equipment. The battery comprises a shell assembly and a battery cell, wherein the shell assembly comprises a shell body, a cover plate, a pole, a connecting piece and a sealing plate; the shell body is provided with an opening end and a blocking end, the battery cell is contained in the shell body, a tab of the battery cell faces the blocking end, and the cover plate covers the opening end. According to the utility model, the pole is arranged at the plugging end integrated with the shell body, so that the connection strength is high; the connecting sheet is straightly arranged, and two ends of the connecting sheet are respectively welded with the pole and the tab, so that the occupation of the internal space of the shell body is reduced, the volume energy density of the battery is increased, the process of bending the connecting sheet is eliminated, and the production efficiency is improved; the welding avoiding opening corresponds to the welding position of the connecting sheet and the tab, so that the welding operation is convenient; the sealing plate covers and seals the welding avoiding opening, the sealing effect is guaranteed, runway type reinforcing ribs are arranged on the sealing plate body, the strength of the sealing plate is improved, and the stability of the battery performance is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and specifically provides a battery, a battery pack including the same, and an electrical device. Background Art

[0002] This part is used to introduce the content related to the utility model, which is not necessarily publicly available beforehand.

[0003] In the related art, the tab is directly welded to the terminal post, or the two are welded through a connecting piece. However, for the convenience of welding operation, a relatively long part needs to be reserved for the tab and the connecting piece, and they are bent or stacked after encapsulation, thus occupying a relatively large space inside the shell. Summary of the Utility Model

[0004] The purpose of the utility model is to solve at least part of the technical problems mentioned above, and this purpose is achieved through the following technical solutions:

[0005] In a first aspect, the utility model provides a battery, which includes a housing assembly and an electric core. The housing assembly includes a housing body, a cover plate, a terminal post, a connecting piece, and a sealing plate; the housing body has an opposite open end and a blocked end along a first direction, the electric core is received into the housing body from the open end, the electric core has a tab, the tab faces the blocked end, and the cover plate seals the open end; the terminal post is arranged at the blocked end, the connecting piece has opposite first and second ends along a second direction, the first end is welded to the terminal post, and the second end is welded to the tab; a welding avoidance opening is formed at the blocked end, the welding avoidance opening corresponds to the second end in the first direction, the sealing plate seals the welding avoidance opening, and the sealing plate includes a sealing plate body and a racetrack-shaped reinforcing rib, and at least one side of the sealing plate body has a racetrack-shaped reinforcing rib; wherein, the first direction intersects with the second direction.

[0006] In some embodiments, a plurality of racetrack-shaped reinforcing ribs are respectively arranged on two sides of the sealing plate body, and the racetrack-shaped reinforcing ribs on different sides are arranged in a staggered manner.

[0007] In some embodiments, a supporting step is arranged on the periphery of the welding avoidance opening, and the supporting step abuts against the sealing plate; the width of the supporting step is W, and the thickness of the supporting step is δ, then W≥0.5mm, δ≥0.3mm.

[0008] In some embodiments, the sealing plate is welded to the welding avoidance opening along the periphery, and the distance between the periphery of the sealing plate and the periphery of the welding avoidance opening is d1, then 0.15mm≤d1≤0.25mm.

[0009] In some embodiments, the distance between the racetrack-shaped reinforcing rib and the outer surface of the housing body is d2, then d2≤1.2mm.

[0010] In some embodiments, the thickness of the housing body is T, and the thickness of the sealing plate body is t, then 0.3T ≤ t ≤ 0.6T.

[0011] In some embodiments, the runway-shaped reinforcing rib includes alternately distributed convex ribs and concave ribs. The concave ribs are lower than the convex ribs and are not lower than the sealing plate body.

[0012] In some embodiments, the height of the convex rib is H, the width of the convex rib is W1, and the width of the concave rib is W2, then 0.3T ≤ H ≤ 1.2T, 0.25T ≤ W1 ≤ 2T, 0.25T ≤ W2 ≤ 2T.

[0013] In a second aspect, the present utility model provides a battery pack, which includes the battery of the first aspect.

[0014] In a third aspect, the present utility model provides an electrical device, which includes the battery pack of the second aspect.

[0015] The technical solution provided by the present utility model has at least the following technical effects:

[0016] In the present utility model, the terminal post is arranged at the sealing end integrated with the housing body, and the connection strength is high; the connecting piece is arranged flatly, and its two ends are respectively welded to the terminal post and the tab, reducing the occupation of the internal space of the housing body, increasing the volume energy density of the battery, and eliminating the process of bending the connecting piece, improving the production efficiency; the welding avoidance opening corresponds to the welding position of the connecting piece and the tab, facilitating the welding operation; the sealing plate covers and welds the welding avoidance opening to ensure the sealing effect, and a runway-shaped reinforcing rib is arranged on the sealing plate body to increase the strength of the sealing plate, which is beneficial to the stability of the battery performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to better combine the content shown in the drawings of the specification with the content described in the specific implementation manner, the drawings of the specification are briefly introduced below. It can be understood that the drawings of the specification mentioned below only schematically show some embodiments of the related technical solutions and the technical solutions of the present utility model. Without creative efforts, those skilled in the art can also make drawings showing other embodiments.

[0018] Specifically, the annotations of the drawings of the specification are as follows:

[0019] Figure 1 Is an axonometric schematic diagram of the battery according to some embodiments of the present utility model;

[0020] Figure 2 Is a front sectional view of the battery according to some embodiments of the present utility model;

[0021] Figure 3 Is Figure 2 The enlarged structural diagram at A in

[0022] Figure 4 Schematic diagram of the structure of the housing assembly according to some embodiments of the present utility model;

[0023] Figure 5 Schematic diagram of the structure of the battery cell according to some embodiments of the present utility model;

[0024] Figure 6 Axonometric schematic diagram of the sealing plate according to some embodiments of the present utility model;

[0025] Figure 7 Side sectional view of the sealing plate according to some embodiments of the present utility model.

[0026] Specifically, the annotations of the reference numerals in the specification drawings are as follows:

[0027] 100, battery; 110, housing assembly; 111, housing body; 1111, open end; 1112, plugging end; 1113, welding avoidance opening; 1114, supporting step; 112, cover plate; 113, pole column; 114, connecting piece; 1141, first end; 1142, second end; 115, sealing plate; 1151, sealing plate body; 1152, racetrack-shaped reinforcing rib; 1153, inner side; 1154, outer side; 120, battery cell; 121, tab; S1, rib; S2, groove; Z, first direction; Y, second direction; X, third direction. Specific embodiments

[0028] To make the content of the embodiments of the present utility model clearer, the following will be described in conjunction with the specification drawings. It can be understood that the content mentioned below is only some embodiments of the present utility model, rather than all the embodiments listed in detail. Therefore, without creative work, other embodiments obtained based on the following embodiments all fall within the protection scope of the present utility model.

[0029] It should be understood that the terms used in this text are only for the purpose of describing specific embodiments, and are not intended to strictly limit the technical solution, unless the context clearly indicates otherwise. For example, the terms "a", "an", and "the" are used to modify features in this text, and it does not exclude the possibility that the feature may also be plural in some other embodiments.

[0030] It should be understood that the terms "comprising", "including", and "having" are open-ended, indicating the existence of the stated features, but do not exclude the possibility that there are other features in this embodiment. Similarly, the terms first, second, etc. are used in this text to describe multiple features, only to distinguish one feature from another. Unless the context clearly indicates otherwise, such terms do not imply order or sequence.

[0031] It should be understood that, unless otherwise clearly specified in the context, the terms "arranged", "connected", and "installed" 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 directly connected or indirectly connected through a medium. For those skilled in the art, the specific meanings of the above terms in the text can be understood according to specific circumstances.

[0032] In addition, for the convenience of description, terms of relative spatial relationship will be used in the text to illustrate the position of one feature relative to another feature. For example, "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It can be understood that the relative spatial relationship between two features should include other specific situations besides those shown in the accompanying drawings of the specification.

[0033] The embodiments of the present invention will be described below in conjunction with the accompanying drawings of the specification.

[0034] In a first aspect, with reference to Figures 1 to 6 , the present invention provides a battery 100, which includes a housing assembly 110 and an electrode core 120. The housing assembly 110 includes a housing body 111, a cover plate 112, a pole column 113, a connecting piece 114, and a sealing plate 115. The housing body 111 has opposite open ends 1111 and a blocking end 1112 along a first direction Z. The electrode core 120 is received in the housing body 111 from the open end 1111. The electrode core 120 has a tab 121, and the tab 121 faces the blocking end 1112. The cover plate 112 seals the open end 1111. The pole column 113 is arranged at the blocking end 1112. The connecting piece 114 has opposite first and second ends 1141 and 1142 along a second direction Y. The first end 1141 is welded to the pole column 113, and the second end 1142 is welded to the tab 121. A welding avoidance opening 1113 is formed at the blocking end 1112, and the welding avoidance opening 1113 corresponds to the second end 1142 in the first direction Z. The sealing plate 115 seals the welding avoidance opening 1113. The sealing plate 115 includes a sealing plate body 1151 and a racetrack-shaped reinforcing rib 1152. At least one side of the sealing plate body 1151 has a racetrack-shaped reinforcing rib 1152. Among them, the first direction Z intersects with the second direction Y.

[0035] In the present utility model, the terminal post 113 is provided at the sealing end 1112 integrated with the housing body 111, with high connection strength; the connecting piece 114 is arranged flatly, and its two ends are respectively welded to the terminal post 113 and the tab 121, reducing the occupation of the internal space of the housing body 111, increasing the volumetric energy density of the battery 100, and eliminating the process of bending the connecting piece 114, thus improving the production efficiency; the welding avoidance opening 1113 corresponds to the welding positions of the connecting piece 114 and the tab 121, facilitating the welding operation; the sealing plate 115 covers and seals the welding avoidance opening 1113 to ensure the sealing effect, and a racetrack-shaped reinforcing rib 1152 is provided on the sealing plate body 1151 to increase the strength of the sealing plate 115, which is beneficial to the stability of the performance of the battery 100.

[0036] It should be noted that the main functions of the racetrack-shaped reinforcing rib 1152 include improving the stiffness and strength of the sealing plate 115, reducing deformation, and making the stress in each direction relatively uniform.

[0037] Particularly, there is also a third direction X. In some embodiments, the first direction Z can be the height direction of the battery 100, the second direction Y can be the length direction of the battery 100, and the third direction X can be the thickness direction of the battery 100, wherein the first direction Z, the second direction Y, and the third direction X are perpendicular to each other in pairs.

[0038] In some embodiments, referring to Figure 6 and Figure 7 , a plurality of racetrack-shaped reinforcing ribs 1152 are respectively provided on both sides of the sealing plate body 1151, and the racetrack-shaped reinforcing ribs 1152 on different sides are arranged staggeredly. In some embodiments, the racetrack-shaped reinforcing rib 1152 includes convex ribs S1 and concave ribs S2 distributed alternately, the concave ribs S2 are lower than the convex ribs S1, and the concave ribs S2 are not lower than the sealing plate body 1151. In some embodiments, the thickness of the housing body 111 is T, and the thickness of the sealing plate body 1151 is t, then 0.3T ≤ t ≤ 0.6T. In some embodiments, the height of the convex rib S1 is H, the width of the convex rib S1 is W1, and the width of the concave rib S2 is W2, then 0.3T ≤ H ≤ 1.2T, 0.25T ≤ W1 ≤ 2T, 0.25T ≤ W2 ≤ 2T.

[0039] In the above embodiments, the sealing plate 115 has opposite inner side surfaces 1153 and outer side surfaces 1154. The inner side surface 1153 faces the battery cell 120, and the outer side surface 1154 faces away from the battery cell 120. Both side surfaces of the sealing plate body 1151 are provided with racetrack-shaped reinforcing ribs 1152 to further increase the strength. Two adjacent racetrack-shaped reinforcing ribs 1152 on the same side surface can be spaced apart, and there is a groove between them. It can also be understood that the racetrack-shaped reinforcing rib 1152 includes a protruding rib S1 and a concave rib S2 arranged alternately, and the concave rib S2 is lower than the protruding rib S1. The multiple racetrack-shaped reinforcing ribs 1152 on different side surfaces are arranged in a staggered manner. For example, the racetrack-shaped reinforcing rib 1152 on the inner side surface 1153 can correspond to the groove on the outer side surface 1154. Similarly, the groove on the inner side surface 1153 corresponds to the racetrack-shaped reinforcing rib 1152 on the outer side surface 1154, or the protruding rib S1 on the inner side surface 1153 corresponds to the concave rib S2 on the outer side surface 1154, and the concave rib S2 on the outer side surface 1154 corresponds to the protruding rib S1 on the inner side surface 1153.

[0040] In addition, the sealing plate body 1151 cannot be too thin, otherwise it will affect the strength, and at the same time it cannot be too thick, otherwise it will affect the overall size of the battery 100. Therefore, the thickness t of the sealing plate body 1151 should be appropriate. For example, it can be 0.3T, 0.45T, 0.6T. Similarly, the sizes of the protruding rib S1 and the concave rib S2 should be appropriate. For example, the height H of the protruding rib S1 can be 0.3T, 1T, 1.2T, the width W1 of the protruding rib S1 can be 0.25T, 1T, 2T, and the width W2 of the concave rib S2 can be 0.25T, 1T, 2T. Further, the thickness T of the housing body 111 is preferably 1.5 mm to 2 mm. For example, it can be 1.5 mm, 1.8 mm, 2 mm.

[0041] In some embodiments, referring to Figure 3 , a supporting step 1114 is provided on the periphery of the welding avoidance opening 1113, and the supporting step 1114 abuts against the sealing plate 115. The width of the supporting step 1114 is W, and the thickness of the supporting step 1114 is δ, then W≥0.5 mm and δ≥0.3 mm. In some embodiments, the sealing plate 115 is welded along the periphery with the welding avoidance opening 1113, and the distance d1 between the periphery of the sealing plate 115 and the periphery of the welding avoidance opening 1113 is 0.15 mm≤d1≤0.25 mm. In some embodiments, the distance d2 from the racetrack-shaped reinforcing rib 1152 to the outer surface of the housing body 111 is d2≤1.2 mm.

[0042] In the above embodiment, the connecting piece 114 can be pre-welded to the pole 113. After the battery cell 120 is placed into the housing body 111, the connecting piece 114 and the tab 121 are welded through the welding avoidance opening 1113, and then the sealing plate 115 is welded to the welding avoidance opening 1113. The welding avoidance opening 1113 is provided with a supporting step 1114 to support the sealing plate 115, increasing the connection strength. The protruding width of the supporting step 1114 cannot be too small, otherwise it will affect the supporting effect. For example, the width W of the supporting step 1114 can be 0.5 mm, 0.6 mm, 0.7 mm. The thickness of the supporting step 1114 cannot be too small either, otherwise it is easy to be penetrated by welding during welding, affecting the supporting effect. For example, the thickness δ of the supporting step 1114 can be 0.3 mm, 0.4 mm, 0.5 mm. In addition, the periphery of the sealing plate 115 needs to be lower than the periphery of the welding avoidance opening 1113 to avoid the solder joints affecting the overall size of the battery 100. The difference in size d1 between the two can be 0.15 mm, 0.2 mm, 0.25 mm. Furthermore, the runway-shaped reinforcing rib 1152 cannot protrude too far from the outer surface of the housing body 111, otherwise it will affect the overall size of the battery 100. For example, d2 can be 0.5 mm, 1 mm, 1.2 mm.

[0043] In a second aspect, the present utility model provides a battery pack, which includes the battery 100 of the first aspect.

[0044] In a third aspect, the present utility model provides an electrical device, which includes the battery pack of the second aspect.

[0045] In the above embodiment, the battery pack of the second aspect and the electrical device of the third aspect both include the battery 100 of the first aspect. Therefore, the battery pack of the second aspect and the electrical device of the third aspect at least have all the technical effects of the battery 100 of the first aspect, and the specific technical effects will not be elaborated here.

[0046] The embodiments of the present utility model only illustrate the structures of the battery pack of the second aspect and the electrical device of the third aspect related to the improvement points of the present application, but it does not mean that they do not have other structures. For example, the battery pack further includes a battery frame for accommodating a plurality of batteries 100, and / or the electrical device further includes a rack for installing a plurality of battery packs, etc. Other structures will not be elaborated one by one here.

[0047] In particular, the term "and / or" in the present utility model should be understood as follows:

[0048] In the first case, the term "and / or" located between the first main body and the second main body includes any one of the following meanings: (1) only the first main body; (2) only the second main body; and (3) the first main body and the second main body.

[0049] In the second case, the term "and / or" between the last two of three or more entities means including at least any one of the multiple entities. For example, "the first entity, the second entity, and / or the third entity" has the same meaning as "the first entity and / or the second entity and / or the third entity", and specifically includes the following combinations: (1) only the first entity; (2) only the second entity; (3) only the third entity; (4) the first entity and the second entity without the third entity; (5) the first entity and the third entity without the second entity; (6) the second entity and the third entity without the first entity; and (7) the first entity, the second entity, and the third entity.

[0050] In addition, although the above has described embodiments of the present utility model in conjunction with the accompanying drawings, those skilled in the art can also make various modifications and variations without departing from the concept of the present utility model, and such modifications and variations shall fall within the scope protected by the present utility model.

Claims

1. A battery, characterized in that: It includes a shell assembly and a battery cell, wherein the shell assembly includes a shell body, a cover plate, a pole, a connecting piece and a sealing plate; The shell body has an open end and a blocking end opposite to each other along a first direction, the battery cell is accommodated in the shell body from the open end, the battery cell has a pole ear, the pole ear faces the blocking end, and the cover plate covers the open end; The pole is arranged at the blocking end, the connecting piece has a first end and a second end opposite to each other along the second direction, the first end is welded to the pole, and the second end is welded to the pole lug; The blocking end is provided with a welding avoidance opening, the welding avoidance opening corresponds to the second end in the first direction, the sealing plate covers the welding avoidance opening, the sealing plate comprises a sealing plate body and a runway-shaped reinforcing rib, and at least one side of the sealing plate body has a runway-shaped reinforcing rib; The first direction intersects the second direction.

2. The battery according to claim 1, characterized in that A plurality of track-shaped reinforcing ribs are respectively arranged on both sides of the sealing plate body, and the track-shaped reinforcing ribs on different sides are arranged alternately.

3. The battery according to claim 1, characterized in that A supporting step is provided at the periphery of the welding avoidance, and the supporting step is in conflict with the sealing plate; The width of the supporting step is W, and the thickness of the supporting step is δ, then W≥0.5mm, δ≥0.3mm.

4. The battery according to claim 1, characterized in that The sealing plate is welded to the welding avoidance opening along the periphery, and the distance between the periphery of the sealing plate and the periphery of the welding avoidance opening is d1, then 0.15mm≤d1≤0.25mm.

5. The battery according to claim 1, characterized in that The distance that the racetrack-shaped reinforcing rib is higher than the outer surface of the shell body is d2, and d2≤1.2mm.

6. The battery according to any one of claims 1 to 5, characterized in that: The thickness of the shell body is T, the thickness of the sealing plate body is t, and then 0.3T≤t≤0.6T.

7. The battery according to claim 6, characterized in that The racetrack-shaped reinforcing ribs include convex ribs and concave ribs distributed alternately, the concave ribs are lower than the convex ribs, and the concave ribs are not lower than the sealing plate body.

8. The battery according to claim 7, characterized in that The height of the convex rib is H, the width of the convex rib is W1, and the width of the concave rib is W2, then 0.3T≤H≤1.2T, 0.25T≤W1≤2T, 0.25T≤W2≤2T.

9. A battery pack, characterized in that: A battery comprising any one of claims 1 to 8.

10. An electrical device, characterized in that: A battery pack comprising the battery pack of claim 9.

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