Battery connection structure, battery and electric equipment

Abstract

The utility model provides a battery connecting structure, a battery and electric equipment, and relates to the field of batteries, the battery connecting structure is used for connecting a tab and a pole, the battery connecting structure comprises a second connecting piece and two oppositely arranged first connecting pieces, each first connecting piece is provided with a first surface, and the second connecting piece is provided with a second surface; the second connecting piece is arranged between the two first connecting pieces, the second connecting piece is concavely arranged in the direction close to the pole lug, so that the second connecting piece is provided with an accommodating space, and the pole column is accommodated in the accommodating space, so that the first surface is attached to the top cover of the battery. According to the battery connecting structure, the second connecting piece which is arranged in the concave manner is used for accommodating the pole, so that the surface of the first connecting piece is attached to the battery top cover, a space gap between the first connecting piece and the battery top cover is reduced, waste of the internal space of the battery is reduced, and the energy density of the battery can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery connection structure, a battery and an electrical device. Background Art

[0002] With the increasing global attention to environmental protection and sustainable development, new energy power batteries have become a key technology to promote green travel and reduce carbon emissions. As an efficient and clean energy storage method, new energy power batteries play an important role in electric vehicles, hybrid vehicles and other fields.

[0003] At present, new energy batteries are in a stage of rapid development, and customers require higher and higher energy density of batteries under the premise of safety. In the related technology, a flat connecting piece is used to assemble the battery cell, and there is a space gap between the assembled connecting piece and the battery top cover, resulting in low space utilization inside the battery cell, thus resulting in low energy density of the battery cell. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the present application provides a battery connection structure, a battery and an electrical device.

[0005] In a first aspect, the present application provides a battery connection structure, which is used to connect a pole lug and a pole column, and the battery connection structure includes: a second connector and two oppositely arranged first connectors, the first connector is arranged on the pole lug, and the first connector has a first surface, the first surface is located on a side of the first connector away from the pole lug, the second connector is arranged between the two first connectors, and the second connector is recessed in a direction close to the pole lug so that the second connector has a accommodating space, and the pole column is accommodated in the accommodating space so that the first surface fits against the battery top cover.

[0006] In combination with the first aspect, in a possible embodiment, the second connecting member includes: a load-bearing portion and an enclosure portion, the load-bearing portion is arranged between the two first connecting members, and the load-bearing portion is used to support the pole, and the enclosure portion is relatively arranged on the load-bearing portion and connected to the load-bearing portion to form a receiving groove, and the receiving groove has the receiving space.

[0007] In combination with the first aspect, in a possible implementation, the receiving groove has a first opening and a second opening, the orientation of the groove opening of the receiving groove is the same as the orientation of the first opening, and the second opening is arranged on two opposite sides of the bearing portion along the first direction.

[0008] In combination with the first aspect, in a possible embodiment, the second opening includes a first edge area, a second edge area and a third edge area, the first edge area and the second edge area are arranged on two opposite sides of the supporting portion along the second direction, the third edge area is respectively connected to the first edge area and the second edge area, and the second direction is perpendicular to the first direction.

[0009] In combination with the first aspect, in a possible implementation, the first edge region, the second edge region and the third edge region are all straight line segments, and the third edge region is respectively connected to the first edge region and the second edge region by arc transition.

[0010] In combination with the first aspect, in a possible embodiment, the first connecting member further has a second surface, the second surface is arranged opposite to the first surface, and a first welding position is arranged on the second surface, the pole ear is welded on the first welding position, and the length of the first welding position along the third direction is smaller than the length of the first connecting member along the third direction, and the third direction is perpendicular to the bearing portion.

[0011] In combination with the first aspect, in a possible embodiment, the first connecting member includes: a first end and a second end, the first end is located at an end of the first connecting member close to the second connecting member, and an opening is provided on the first end, and the first welding position is provided at an end of the second surface close to the second end.

[0012] In a second aspect, the present application provides a battery, comprising a battery top cover, a core pack, a battery shell and the above-mentioned battery connection structure, the pole ear is welded at a first welding position of the battery connection structure, the pole post is welded at a second welding position of the battery connection structure, the battery top cover is connected to the battery shell to form a accommodating cavity, the core pack, the pole ear and the battery connection structure are all arranged in the accommodating cavity, the pole post is at least partially arranged in the accommodating cavity, and the pole ear is arranged at one end of the core pack close to the battery top cover.

[0013] In combination with the second aspect, in a possible implementation, the core pack has a first preset length a along the third direction, a preset spacing b exists between the first welding position and the battery housing along the third direction, and a / 4≤b≤a / 2.

[0014] In a third aspect, the present application provides an electrical device that uses the above-mentioned battery.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The battery connection structure provided in the present application has the second connecting member recessed in a direction close to the pole ear so that the second connecting member has a accommodating space, and the pole is accommodated in the accommodating space so that the first surface fits with the battery top cover. Compared with a connecting piece with a flat structure, the battery connection structure accommodates the pole through the recessed second connecting member so that the surface of the first connecting member fits with the battery top cover, thereby reducing the space gap between the first connecting member and the battery top cover, reducing the waste of internal space of the battery, and effectively improving the energy density of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The overall structure diagram of the battery is shown;

[0019] Figure 2 A schematic diagram of a cross-sectional structure of a battery is shown;

[0020] Figure 3 Shows Figure 2 Enlarged view of middle part B;

[0021] Figure 4 shows an exploded schematic diagram of a battery;

[0022] Figure 5 A schematic diagram showing a battery connection structure;

[0023] Figure 6 A schematic structural diagram showing a battery connection structure from another angle.

[0024] Description of main component symbols:

[0025] 100-first connecting member; 110-first surface; 120-second surface; 130-first end; 131-opening; 140-second end; 200-second connecting member; 210-bearing portion; 220-enclosing portion; 230-accommodating groove; 231-first edge area; 232-second edge area; 233-third edge area; 300-ear; 400-pole; 500-battery top cover; 600-core pack; 700-battery housing; 710-blocking piece; 720-supporting piece; 800-protective film. DETAILED DESCRIPTION

[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] Embodiment 1

[0032] See also Figure 4 and Figure 5 , an embodiment of the present application provides a battery connection structure, which is used to connect a pole lug 300 and a pole column 400, and the battery connection structure includes: a second connector 200 and two oppositely arranged first connectors 100, the first connector 100 is arranged on the pole lug 300, and the first connector 100 has a first surface 110, the first surface 110 is located on the side of the first connector 100 away from the pole lug 300, the second connector 200 is arranged between the two first connectors 100, and the second connector 200 is recessed in a direction close to the pole lug 300, so that the second connector 200 has a accommodating space, and the pole column 400 is accommodated in the accommodating space, so that the first surface 110 fits with the battery top cover 500. Compared with the connecting piece of the flat structure, the battery connecting structure accommodates the pole 400 through the recessed second connecting member 200, so that the surface of the first connecting member 100 fits with the battery top cover 500, reducing the space gap between the first connecting member 100 and the battery top cover 500, reducing the waste of internal space of the battery, and effectively improving the energy density of the battery.

[0033] See also Figure 5 and Figure 6 In some embodiments, the second connector 200 includes: a bearing portion 210 and a blocking portion 220. The bearing portion 210 is disposed between the two first connectors 100, and the bearing portion 210 is used to bear the pole 400. The blocking portion 220 is disposed on the bearing portion 210 opposite to each other, and is connected to the bearing portion 210 to form a receiving groove 230. The receiving groove 230 has the receiving space. The blocking portion 220 is connected to the first connector 100.

[0034] In some embodiments, the receiving groove 230 has a first opening and a second opening. The orientation of the notch of the receiving groove 230 is the same as the orientation of the first opening. The second opening is arranged at two opposite sides of the bearing portion 210 along the first direction. When the pole 400 is placed in the receiving groove 230, the first opening and the second opening provide heat dissipation openings for the pole 400, which increases the heat dissipation speed of the pole 400 and helps to extend the service life of the pole 400.

[0035] See also Figure 6In some embodiments, the second opening includes a first edge region 231, a second edge region 232, and a third edge region 233. The first edge region 231 and the second edge region 232 are disposed at two opposite sides of the carrying portion 210 along a second direction. The third edge region 233 is connected to the first edge region 231 and the second edge region 232, respectively. The second direction is perpendicular to the first direction.

[0036] In some embodiments, the first edge area 231 is a straight line segment. The second edge area 232 is a straight line segment, and the length of the second edge area 232 is equal to the length of the first edge area 231. The third edge area 233 is a straight line segment, and the length of the third edge area 233 is greater than the length of the first edge area 231. The third edge area 233 is connected to the first edge area 231 and the second edge area 232 by arc transition, and the third edge area 233 is connected to the first edge area 231 and the second edge area 232 by arc transition.

[0037] In some embodiments, the battery connection structure is integrally formed by stamping a conductive sheet, and has good structural strength.

[0038] In some embodiments, the length of the first connecting member 100 along the second direction is 0.5 mm to 2.5 mm, and the length of the first connecting member 100 along the second direction is equal to the length of the carrying portion 210 along the second direction.

[0039] See also Figure 5 and Figure 6 In some embodiments, the first connector 100 further has a second surface 120. The second surface 120 is arranged opposite to the first surface 110, and a first welding position is arranged on the second surface 120. The tab 300 is welded on the first welding position. The length of the first welding position along the third direction is less than the length of the first connector 100 along the third direction, so that a welding gap can be reserved for the tab 300 to be welded on the first welding position, providing a welding operation space and improving the convenience of the welding operation.

[0040] In some embodiments, the third direction is perpendicular to the carrying portion 210 , the third direction is perpendicular to the first direction, and the third direction is perpendicular to the second direction.

[0041] In some embodiments, a second welding position is provided on the bearing portion 210. The pole 400 is welded on the second welding position. The area of ​​the second welding position is larger than the area of ​​the end surface of the pole 400, so as to provide a welding operation space for the pole 400 to be welded on the second welding position.

[0042] In some embodiments, the length of the bearing portion 210 along the first direction is smaller than the length of the first connector 100 along the first direction, which can increase the heat dissipation speed of the pole 400 .

[0043] See also Figure 5 and Figure 6 In some embodiments, the first connector 100 includes a first end 130 and a second end 140. The first end 130 is located at an end of the first connector 100 close to the enclosure 220. An opening 131 is provided on the first end 130. The second end 140 is located at an end of the first connector 100 away from the enclosure 220. The first welding position is provided at an end of the second surface 120 close to the second end 140.

[0044] The pole lug 300 is welded to the first welding position, and the pole post 400 is welded to the second welding position, so that the first surface 110 is fitted with the battery top cover 500. Compared with the connecting piece of the flat structure, the battery connection structure accommodates and welds the pole post 400 through the recessed second connecting member 200, which can reduce the space gap between the first connecting member 100 and the battery top cover 500, reduce the waste of internal space of the battery, and effectively improve the energy density of the battery. In addition, the length of the first welding position along the third direction is smaller than the length of the first connecting member 100 along the third direction, so that a welding gap can be reserved for the pole lug 300 to be welded to the first welding position, thereby improving the convenience of the welding operation.

[0045] Embodiment 2

[0046] See also Figures 1 to 4 An embodiment of the present application provides a battery, which includes a battery top cover 500, a core pack 600, a battery shell 700 and the battery connection structure in any one of the above embodiments. Therefore, it has all the beneficial effects of the battery connection structure in any one of the above embodiments, which will not be described one by one here.

[0047] In some embodiments, the tab 300 is welded to a first welding position of the battery connection structure, and the pole 400 is welded to a second welding position of the battery connection structure.

[0048] See also Figure 4In some embodiments, the battery housing 700 is in the shape of a quadrangular prism, and the battery housing 700 includes: a baffle 710 and a support 720. The baffle 710 is arranged around the periphery of the support 720 and is connected to the support 720. The battery top cover 500 is arranged at one end of the baffle 710 away from the support 720, and the battery top cover 500 is connected to the baffle 710 to enclose the baffle 710 and the support 720 to form a receiving cavity.

[0049] In other embodiments, the battery housing 700 is also in the shape of a cylinder, a pentagonal prism, a hexagonal prism, etc., which are not listed here for description.

[0050] See also Figure 2 In some embodiments, the core package 600 is disposed in the accommodating cavity, the number of the core packages 600 is four, and the core package 600 has a first preset length a along the third direction.

[0051] In other embodiments, the number of the core packages 600 may be five, six, seven, etc., which are not listed here one by one.

[0052] In some embodiments, the tab 300 is disposed in the accommodating cavity, and the tab 300 is connected to one end of the core pack 600 close to the battery top cover 500. The battery connection structure is disposed in the accommodating cavity. The welding end of the pole 400 is disposed in the accommodating cavity.

[0053] See also Figure 2 and Figure 3 In some embodiments, there is a preset distance b between the welding end of the tab 300 and the blocking piece 710 along the third direction.

[0054] In some embodiments, a / 4≤b≤a / 2, so as to avoid redundancy caused by the excessive length of the tab 300 and provide operating space for welding the tab 300 .

[0055] See also Figure 3 In some embodiments, the battery connection structure has a second preset length c along the third direction.

[0056] In some embodiments, c=4a-2b+2, so as to reserve a welding gap for welding the tab 300 .

[0057] See also Figure 4In some embodiments, the battery further includes a protective film 800. The protective film 800 is disposed in the accommodating cavity, and is used to wrap the core package 600 to provide external protection for the core package 600, prevent the core package 600 from being affected by external substances and the environment, and prevent the positive and negative electrodes inside the core package 600 from being short-circuited.

[0058] Embodiment 3

[0059] The embodiment of the present application provides an electrical device (not shown in the figure), which uses the battery in the above-mentioned embodiment 2.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery connection structure, the battery connection structure is used to connect a pole ear and a pole, characterized in that: include: Two first connecting members arranged opposite to each other, wherein the first connecting members are arranged on the pole lugs and have a first surface, and the first surface is located on a side of the first connecting member away from the pole lugs; The second connector is arranged between the two first connectors, and the second connector is recessed in a direction close to the pole ear, so that the second connector has a receiving space, and the pole is received in the receiving space, so that the first surface fits with the battery top cover.

2. The battery connection structure according to claim 1, characterized in that: The second connecting member comprises: A bearing portion, the bearing portion is disposed between the two first connecting members, and the bearing portion is used to bear the pole; The enclosure parts are arranged on the bearing part opposite to each other and connected with the bearing part to form a receiving groove, and the receiving groove has the receiving space.

3. The battery connection structure according to claim 2, characterized in that: The receiving groove has a first opening and a second opening. The orientation of the groove opening of the receiving groove is the same as that of the first opening. The second opening is disposed at two opposite sides of the carrying portion along the first direction.

4. The battery connection structure according to claim 3, characterized in that: The second opening includes a first edge area, a second edge area and a third edge area. The first edge area and the second edge area are arranged on two opposite sides of the supporting portion along a second direction. The third edge area is connected to the first edge area and the second edge area respectively. The second direction is perpendicular to the first direction.

5. The battery connection structure according to claim 4, characterized in that: The first edge region, the second edge region and the third edge region are all straight line segments, and the third edge region is respectively connected to the first edge region and the second edge region by arc transition.

6. The battery connection structure according to claim 2, characterized in that: The first connecting member also has a second surface, which is arranged opposite to the first surface, and a first welding position is arranged on the second surface. The pole ear is welded on the first welding position, and the length of the first welding position along the third direction is smaller than the length of the first welding position along the third direction, and the third direction is perpendicular to the bearing part.

7. The battery connection structure according to claim 6, characterized in that: The first connecting member comprises: A first end portion, the first end portion is located at one end of the first connecting member close to the second connecting member, and an opening is provided on the first end portion; The second end portion, the first welding position is disposed at an end of the second surface close to the second end portion.

8. A battery, characterized in that: It includes a battery top cover, a core pack, a battery shell and the battery connection structure according to any one of claims 1 to 7, the pole ear is welded to a first welding position of the battery connection structure, the pole column is welded to a second welding position of the battery connection structure, the battery top cover is connected to the battery shell to form a accommodating cavity, the core pack, the pole ear and the battery connection structure are all arranged in the accommodating cavity, the pole column is at least partially arranged in the accommodating cavity, and the pole ear is arranged at one end of the core pack close to the battery top cover.

9. The battery according to claim 8, characterized in that The core pack has a first preset length a along the third direction, a preset distance b exists between the first welding position and the battery housing along the third direction, and a / 4≤b≤a / 2.

10. An electrical device, characterized in that: A battery according to any one of claims 8 to 9 is used.

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