Battery and battery pack

Abstract

The application relates to the technical field of batteries, and discloses a battery and a battery pack. The battery comprises two opposite first surfaces, four second surfaces arranged around the first surfaces, a pole assembly and a busbar, the area of the first surface is larger than that of the second surface, the pole assembly is arranged on the first surface, the busbar is bent into a first section and a second section, the first section is located on one side of the first surface where the pole assembly is arranged and is connected with the pole assembly, the second section is slightly parallel to one second surface and is used for electrically connecting the pole assembly of another battery. The pole assembly is arranged on the first surface of the battery, that is, the pole assembly is arranged on the large surface of the battery, the first section of the busbar is connected with the pole assembly and directly opposite to the first surface, and the second section of the busbar is slightly parallel to one second surface, so that the pole assembly of another battery can be electrically connected conveniently.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery and a battery pack. BACKGROUND

[0002] In the related art, the battery needs to be connected in series and in parallel during the grouping process. Due to the structural limitations of the battery, it is extremely inconvenient to connect the poles between the batteries during the grouping process in the related art. SUMMARY

[0003] The present application provides a battery and a battery pack to improve the structure of the battery.

[0004] According to a first aspect of the present application, a battery is provided, comprising:

[0005] two opposite first surfaces and four second surfaces arranged around the first surfaces, the area of the first surface being larger than the area of the second surface;

[0006] a pole assembly, the pole assembly being arranged on the first surface;

[0007] a busbar, the busbar being bent into a first section and a second section, the first section being located on one side of the first surface on which the pole assembly is arranged and connected with the pole assembly, and the second section being slightly parallel to one of the second surfaces and used for electrically connecting the pole assembly of another battery.

[0008] The battery of the embodiment of the present application comprises a pole assembly and a busbar, the pole assembly is arranged on the first surface of the battery, i.e. the pole assembly is arranged on the large surface of the battery, the first section of the busbar is connected with the pole assembly and directly opposite to the first surface, and the second section of the busbar is slightly parallel to the second surface, so that the pole assembly of another battery can be electrically connected.

[0009] According to a second aspect of the present application, a battery pack is provided, comprising a first battery and a second battery, the first battery comprising:

[0010] two opposite first surfaces and four second surfaces arranged around the first surfaces, the area of the first surface being larger than the area of the second surface;

[0011] a first pole assembly, the first pole assembly being arranged on the first surface;

[0012] a first busbar, the first busbar being bent into a first section and a second section, the first section being located on one side of the first surface on which the first pole assembly is arranged and connected with the first pole assembly, and the second section being slightly parallel to one of the second surfaces;

[0013] the second battery comprising a second pole assembly;

[0014] The first battery and the second battery are arranged side by side, so that the second section is connected to the second pole assembly.

[0015] The battery pack comprises the first battery and the second battery. The first pole assembly of the first battery is arranged on the first surface, i.e. the first pole assembly is arranged on the large surface of the first battery. The first section of the first busbar is connected to the first pole assembly and directly opposite to the first surface, and the second section of the first busbar is slightly parallel to the second surface, so that the electrical connection with the second pole assembly of the second battery can be easily achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] For better understanding of the present disclosure, reference can be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements can be omitted in order to emphasize and clarify the technical features of the present disclosure. In addition, related elements or components can have different arrangements as known in the art. Furthermore, in the drawings, the same reference numerals represent the same or similar components throughout the various drawings. Among them:

[0017] Figure 1 is a structural schematic diagram of a battery according to an exemplary embodiment;

[0018] Figure 2 is a partial structural schematic diagram of a battery according to an exemplary embodiment;

[0019] Figure 3 is a partial exploded structural schematic diagram of a battery according to an exemplary embodiment;

[0020] Figure 4 is a partial structural schematic diagram of a battery pack according to an exemplary embodiment;

[0021] Figure 5 is an exploded structural schematic diagram of a battery pack according to an exemplary embodiment;

[0022] Figure 6 is a structural schematic diagram of a first battery of a battery pack according to an exemplary embodiment;

[0023] Figure 7 is a partial exploded structural schematic diagram of a first battery of a battery pack according to an exemplary embodiment;

[0024] Figure 8 is a simple structural schematic diagram of a battery pack according to a first exemplary embodiment;

[0025] Figure 9 is a simple structural schematic diagram of a battery pack according to a second exemplary embodiment;

[0026] Figure 10 is a simple structural schematic diagram of a battery pack according to a third exemplary embodiment;

[0027] Figure 11 is a simple structural schematic diagram of a battery pack according to a fourth exemplary embodiment;

[0028] Figure 12 is a simple structural schematic diagram of a battery pack according to a fifth exemplary embodiment;

[0029] Figure 13 is a simple structural schematic diagram of a battery pack according to a sixth exemplary embodiment;

[0030] Figure 14 is a simple structural schematic diagram of a battery pack according to a seventh exemplary embodiment;

[0031] Figure 15 is a simple structural schematic diagram of a battery pack according to an eighth exemplary embodiment.

[0032] The reference signs are explained as follows:

[0033] 100, battery body; 110, pole assembly; 120, busbar; 101, recess;

[0034] 1, first battery; 10, first battery body; 11, first recess; 12, first surface; 13, second surface; 14, cell; 141, cell body; 142, tab; 15, shell; 151, first shell piece; 152, second shell piece; 153, accommodating cavity; 154, flange; 20, first pole assembly; 30, first busbar; 31, first section; 32, second section;

[0035] 2, second battery; 40, second battery body; 41, second recess; 42, third surface; 43, fourth surface; 50, second pole assembly; 60, second busbar; 61, third section; 62, fourth section; 70, adapter plate. DETAILED DESCRIPTION

[0036] The technical solutions in the example embodiments of the present disclosure will be described clearly and completely in combination with the accompanying drawings of the example embodiments of the present disclosure. The example embodiments described herein are only for illustrative purposes, and are not used to limit the protection scope of the present disclosure, so it should be understood that various modifications and changes can be made to the example embodiments without departing from the protection scope of the present disclosure.

[0037] In the description of the present disclosure, unless explicitly specified and limited, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more; the term "and / or" includes any combination and all combinations of one or more associated listed items. In particular, referring to "the" object or "one" object is also intended to represent one of the possible multiple such objects.

[0038] Unless otherwise specified or explained, the terms "connection", "fixation" and the like should be interpreted broadly, for example, "connection" can be fixed connection, or detachable connection, or integrally connected, or electrically connected, or signal connected; "connection" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0039] Further, in the description of the present disclosure, it should be understood that the orientation words such as "upper", "lower", "inner", "outer" described in the example embodiments of the present disclosure are described with the angle shown in the drawings, and should not be understood as a limitation of the example embodiments of the present disclosure. It should also be understood that in the context, when referring to one element or feature connected to another element (one or more) "on", "under", or "inside", "outside", it can not only be directly connected to another element (one or more) "on", "under", or "inside", "outside", but also indirectly connected to another element (one or more) "on", "under", or "inside", "outside" through an intermediate element.

[0040] One embodiment of the present application provides a battery, please refer to Figures 1 to 3 The battery comprises: two opposite first surfaces 12 and four second surfaces 13 arranged around the first surface 12, the area of the first surface 12 is larger than the area of the second surface 13; a pole assembly 110, the pole assembly 110 is arranged on the first surface 12; a busbar 120, the busbar 120 is bent into a first section 31 and a second section 32, the first section 31 is located on one side of the first surface 12 where the pole assembly 110 is arranged, and is connected with the pole assembly 110, the second section 32 is slightly parallel to one second surface 13, and is used for electrically connecting the pole assembly of another battery.

[0041] The battery of one embodiment of the present application comprises a pole assembly 110 and a busbar 120, the pole assembly 110 is arranged on the first surface 12 of the battery, that is, the pole assembly 110 is arranged on the large surface of the battery, the first section 31 of the busbar 120 is connected with the pole assembly 110, and directly opposite the first surface 12, and the second section 32 of the busbar 120 is slightly parallel to the second surface 13, so that the pole assembly of another battery can be conveniently electrically connected.

[0042] It should be noted that the second section 32 of the busbar 120 can be connected with the busbar of another battery, i.e. the busbar 120 is electrically connected with the pole assembly of another battery through the busbar of another battery, or the busbar 120 can be used to connect other structures, such as cables, etc., or the busbar 120 can be directly connected with the pole assembly of another battery.

[0043] The battery comprises a battery body 100, the battery body 100 comprises two opposite first surfaces 12 and four second surfaces 13 arranged around the first surfaces 12, i.e. the battery body 100 is approximately a rectangular structure, i.e. the battery body 100 can be a rectangular structure when the manufacturing errors, etc. are ignored.

[0044] The two opposite first surfaces 12 are large surfaces of the battery body 100, and the four second surfaces 13 are small surfaces of the battery body 100, the four second surfaces 13 comprise two pairs of small surfaces, i.e. a first pair of small surfaces extending along the length direction of the battery body 100, and a second pair of small surfaces extending along the width direction of the battery body 100, and the area of the first pair of small surfaces is greater than the area of the second pair of small surfaces, but both are smaller than the area of the large surface. The pole assembly 110 is arranged on the first surface 12, so as to ensure that the pole assembly 110 has a reliable supporting surface, thereby ensuring the stability of the pole assembly 110.

[0045] In an embodiment, the orthographic projection of the first section 31 and the pole assembly 110 on a first surface 12 at least partially coincides, i.e. the first section 31 and the pole assembly 110 can be directly connected, and the connection is convenient.

[0046] Alternatively, the orthographic projection of the first section 31 and the pole assembly 110 on a first surface 12 does not coincide, i.e. the first section 31 and the pole assembly 110 can be connected through a metal connecting piece.

[0047] The second section 32 and the second surface 13 are slightly parallel, which actually ignores the manufacturing errors, etc. The second section 32 can be parallel to the first pair of small surfaces extending along the length direction of the battery body 100, or the second section 32 can be parallel to the second pair of small surfaces extending along the width direction of the battery body 100.

[0048] Alternatively, the first section 31 and the first surface 12 are slightly parallel, i.e. when the end of the pole assembly 110 connected with the first section 31 is parallel to the first surface 12, the first section 31 and the first surface 12 can be slightly parallel, and the included angle between the first section 31 and the second section 32 is a right angle. Of course, in some embodiments, the first section 31 can be inclined to the first surface 12, and the included angle between the first section 31 and the second section 32 can be an acute angle or an obtuse angle.

[0049] In one embodiment, the first section 31 and the second section 32 are substantially perpendicular, so as to ensure the busbar 120 to be conveniently connected and the space of the battery to be effectively utilized. The substantially perpendicular means that the first section 31 and the second section 32 can be vertically arranged if various errors are ignored. Alternatively, the included angle between the first section 31 and the second section 32 is 80 degrees to 100 degrees, and further, the included angle between the first section 31 and the second section 32 is 85 degrees to 95 degrees.

[0050] It should be noted that the substantially perpendicular of the first section 31 and the second section 32 is considered in the light of the specific process error and the like, that is, the included angle between the first section 31 and the second section 32 is a right angle if the manufacturing error and the like are ignored. Alternatively, the included angle between the first section 31 and the second section 32 is 80 degrees to 100 degrees, and further, the included angle between the first section 31 and the second section 32 is 85 degrees to 95 degrees. As shown in FIG. 1, when the first section 31 and the second section 32 are transitioned by the arc, the first section 31 and the second section 32 are approximately perpendicular, which mainly reflects the extension direction of the whole, and does not particularly mean that the first section 31 and the second section 32 must be transitioned by a right angle. Figure 2

[0051] In one embodiment, the orthographic projection of the second section 32 on the plane where the first surface 12 is located is located outside the first surface 12, that is, one end of the first section 31 needs to extend to the outside of the circumferential outer edge of the battery body 100, so that the second section 32 can not be located in the space where the circumferential outer edge of the battery body 100 is located, thereby facilitating the subsequent connection.

[0052] Alternatively, at least part of the orthographic projection of the second section 32 on the plane where the first surface 12 is located is located inside the first surface 12, that is, one end of the first section 31 can not extend to the outside of the circumferential outer edge of the battery body 100, so that the second section 32 can be located in the space where the circumferential outer edge of the battery body 100 is located. At this time, if the second section 32 is connected to the pole post assembly of another battery, the second section 32 can be directly extended to the pole post assembly of another battery to realize the connection (that is, the pole post assemblies of the two batteries can be directly opposite), or the second section 32 can be connected to the busbar of another battery.

[0053] It should be noted that the busbar 120 is bent towards the direction away from the first surface 12, that is, the busbar 120 increases the occupied space in the height direction of the battery. Alternatively, the busbar 120 is bent towards the direction close to the first surface 12, that is, the busbar 120 does not increase the occupied space in the height direction of the battery.

[0054] ​It should be noted that when the orthographic projection of the second section 32 on the plane where the first surface 12 is located is located outside the first surface 12, the busbar 120 will increase the occupied space in the length direction of the battery regardless of the folding direction, which can facilitate the electrical connection between the busbar 120 and the external components.

[0055] In one embodiment, there are two pole column assemblies 110, and two busbars 120, and the two busbars 120 are respectively connected to the two pole column assemblies 110, so that the two pole column assemblies 110 are electrically connected to other components through the two busbars 120.

[0056] In one embodiment, as shown in Figure 1 the two pole column assemblies 110 are arranged on the same first surface 12; wherein the busbar 120 on one pole column assembly 110 is folded in a direction away from the first surface 12, and the busbar 120 on the other pole column assembly 110 is folded in a direction close to the first surface 12, so that the connection between the battery and the external components can be facilitated, for example, when the battery is connected in series with another battery, the two busbars 120 can extend to one side of the other two batteries, so that the connection can be facilitated.

[0057] Optionally, the two pole column assemblies 110 can be arranged on two first surfaces 12 respectively.

[0058] In one embodiment, the first section 31 is welded with the pole column assembly 110, so as to ensure the stability of the connection.

[0059] In one embodiment, the thickness of the welding part of the first section 31 and the pole column assembly 110 is less than the thickness of the second section 32, so that the welding of the first section 31 and the pole column assembly 110 can be facilitated. Specifically, it can be understood that the first section 31 is subjected to a connection thinning process, so that the welding energy can quickly form a weld between the first section 31 and the pole column assembly 110.

[0060] It should be noted that the first section 31 can be partially thinned, and of course, the first section 31 can also be thinned as a whole.

[0061] In one embodiment, the busbar 120 and the pole column assembly 110 can be an integrated structure, i.e. the busbar 120 and the pole column assembly 110 are an integral structure, which is relatively simple in structure and relatively high in stability. The integrated structure can be formed by fixing a plurality of independent components, i.e. the busbar 120 and the pole column assembly 110 are connected before the battery is assembled, rather than being connected during the battery assembly process. The integrated structure can also be an integral forming structure, i.e. the busbar 120 and the pole column assembly 110 are integrally formed.

[0062] It should be noted that the pole assembly 110 can be arranged on the battery body 100 or can be accommodated in the battery body 100, that is, a recess can be formed in the battery body 100 to accommodate the pole assembly 110. The pole assembly 110 and the recess 101 can be arranged on two first surfaces 12 respectively or can be arranged on the same first surface 12.

[0063] In one embodiment, the recess 101 is arranged on the battery body 100, so that when the batteries are grouped, the pole assembly of another battery can be accommodated in the recess 101, thereby avoiding the pole assembly occupying the space between two batteries and reducing the distance between two adjacent batteries, so as to improve the energy density of the battery group.

[0064] It should be noted that the recess 101 on the battery body 100 is used to accommodate the pole assembly of another battery, that is, when two batteries are grouped, the pole assembly of another battery can be accommodated in the recess 101.

[0065] In one embodiment, as shown in Figure 3 , the battery body 100 comprises a battery cell 14 connected with the pole assembly 110 and a shell 15 in which the battery cell 14 is arranged. The recess 101 and the pole assembly 110 are arranged on the shell 15, which is convenient for installation and has a relatively simple structure, and the pole assembly 110 can be installed by using the shell 15.

[0066] Optionally, the shell 15 can be made of stainless steel or aluminum, which has good corrosion resistance and sufficient strength.

[0067] In one embodiment, the thickness of the shell 15 is uniform, which not only has strong structural stability but also is convenient for processing.

[0068] In one embodiment, as shown in Figure 1 and Figure 3 , the shell 15 comprises a first shell member 151 and a second shell member 152 connected with the first shell member 151 to enclose the battery cell 14. The first shell member 151 and the second shell member 152 are arranged respectively, which is convenient for installation of the battery cell 14 and processing.

[0069] In one embodiment, the recess 101 and the pole assembly 110 can be arranged on the first shell member 151 or the recess 101 and the pole assembly 110 can be arranged on the second shell member 152.

[0070] In one embodiment, one of the recess 101 and the pole assembly 110 is arranged on the first housing piece 151, and the other is arranged on the second housing piece 152, so as to ensure sufficient installation space and structural strength.

[0071] Optionally, the first housing piece 151 and the second housing piece 152 can each be formed with a receiving cavity 153, and the battery cell 14 is located in a cavity formed by the two receiving cavities 153 after the first housing piece 151 and the second housing piece 152 are butted. The depths of the receiving cavities 153 of the first housing piece 151 and the second housing piece 152 can be the same or different, which is not limited here.

[0072] Optionally, the first housing piece 151 is a flat plate, and the second housing piece 152 is formed with a receiving cavity 153, and the battery cell 14 is located in the receiving cavity 153. The flat plate can facilitate subsequent connection and has low processing difficulty.

[0073] Further, the circumferential edge of the second housing piece 152 is provided with a flange 154, and the first housing piece 151 is welded with the flange 154, so as to ensure reliable welding of the first housing piece 151 and the second housing piece 152 and provide stability of the connection. The flange 154 is mainly arranged to increase the welding area and improve the stability of the welding.

[0074] Optionally, when the first housing piece 151 has a receiving cavity 153, the circumferential edge of the first housing piece 151 can also be provided with a flange 154, as shown in Figure 3 The flange 154 of the first housing piece 151 is welded with the flange 154 of the second housing piece 152.

[0075] It should be noted that the flange 154 can be understood as a flange edge, for example, a flange edge extending outwardly from the circumferential outer edge of a flat plate, or a flange edge extending outwardly from the side wall of a structure having a receiving cavity 153, at this time, the flange edge is substantially perpendicular to the side wall. For the above-mentioned embodiments in which the flange 154 is arranged on the circumferential edge of the first housing piece 151 and the second housing piece 152, the arrangement can be referred to, so that the flange 154 of the first housing piece 151 and the flange 154 of the second housing piece 152 can be directly opposite, so as to facilitate connection.

[0076] In one embodiment, as shown in Figure 3As shown, the battery cell 14 includes a battery cell body 141 and a tab 142, the tab 142 extends from the length direction of the battery cell body 141; wherein the tab 142 is connected with the pole assembly 110, at this time the pole assembly 110 can be arranged at the end of the battery body 100, so as to facilitate connection, and the length space of the battery can be fully utilized. Wherein the tab 142 and the pole assembly 110 can be directly connected, that is, the tab 142 and the pole assembly 110 can be directly welded, or the tab 142 and the pole assembly 110 can be connected through a metal adapter piece, the specific connection mode can be welding, and riveting and other modes are not excluded, which is not limited here.

[0077] It should be noted that the battery cell body 141 includes two or more pole pieces, the tab 142 includes two or more single tabs, the single tabs respectively extend from the corresponding pole pieces, the width of the single tab is less than the width of the pole piece, and the plurality of single tabs are stacked to form the tab 142 and are connected with the pole assembly 110, wherein the tab 142 can be welded with the pole assembly 110. Wherein the single tab is made of a metal foil with good electrical conductivity and thermal conductivity, for example, aluminum, copper or nickel, etc.

[0078] In some embodiments, the pole assembly 110 is two, the two pole assemblies 110 are respectively a positive pole assembly and a negative pole assembly, the tab 142 is also two, the two tabs 142 are respectively a positive tab and a negative tab, the positive pole assembly and the positive tab are connected, and the negative pole assembly and the negative tab are connected.

[0079] It should be noted that the pole assembly 110 and the shell 15 are insulated, for example, an insulating piece can be used for insulation between the two, or an insulating coating can be used for insulation, which is not limited here, and can be selected according to actual needs.

[0080] In one embodiment, the length of the battery is a, 400mm≤a≤2500mm, the width of the battery is b, the height of the battery is c, 2b≤a≤50b, and / or, 0.5c≤b≤20c.

[0081] Further, 50mm≤b≤200mm, 10mm≤c≤100mm.

[0082] Preferably, 4b≤a≤25b, and / or, 2c≤b≤10c.

[0083] The battery in the above embodiment has a large ratio of length to width of the battery under the condition of ensuring sufficient energy density, and further has a large ratio of width to height of the battery.

[0084] In one embodiment, the length of the battery is a, the width of the battery is b, 4b≤a≤7b, that is, the ratio of the length and the width of the battery in this embodiment is large, so as to increase the energy density of the battery and facilitate subsequent formation of the battery module.

[0085] In one embodiment, the height of the battery is c, 3c≤b≤7c, the ratio of the width and the height of the battery is large, which facilitates formation under the condition of sufficient energy density.

[0086] Optionally, the length of the battery can be 500mm-1500mm, the width of the battery can be 80mm-150mm, and the height of the battery can be 15mm-25mm.

[0087] It should be noted that the length of the battery is the size of the length direction of the battery, the width of the battery is the size of the width direction of the battery, and the height of the battery is the thickness of the battery.

[0088] In one embodiment, the battery is a laminated battery, which is not only convenient to group, but also can be processed to obtain a battery with a longer length.

[0089] Specifically, the battery cell 14 is a laminated battery cell, and the battery cell 14 has a first pole piece, a second pole piece opposite to the first pole piece, and a diaphragm piece arranged between the first pole piece and the second pole piece, so that a plurality of pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell.

[0090] Optionally, the battery can be a wound battery, that is, the first pole piece, the second pole piece opposite to the first pole piece, and the diaphragm piece arranged between the first pole piece and the second pole piece are wound to obtain a wound battery cell.

[0091] One embodiment of the present application also provides a battery pack, please refer to Figures 4 to 7 The battery pack includes a first battery 1 and a second battery 2, the first battery 1 includes two opposite first surfaces 12 and four second surfaces 13 arranged around the first surface 12, the area of the first surface 12 is larger than the area of the second surface 13; a first pole assembly 20 is arranged on the first surface 12; a first bus bar 30 is bent into a first section 31 and a second section 32, the first section 31 is located on one side of the first surface 12 where the first pole assembly 20 is arranged, and is connected with the first pole assembly 20, and the second section 32 is parallel to one of the second surfaces 13; the second battery 2 includes a second pole assembly 50; wherein the first battery 1 and the second battery 2 are arranged side by side, so that the second section 32 is connected with the second pole assembly 50.

[0092] The battery pack of one embodiment of the present application comprises a first battery 1 and a second battery 2. The first pole assembly 20 of the first battery 1 is arranged on the first surface 12, i.e. the first pole assembly 20 is arranged on the large surface of the first battery 1. The first section 31 of the first busbar 30 is connected with the first pole assembly 20 and directly opposite to the first surface 12, while the second section 32 of the first busbar 30 is slightly parallel to the second surface 13, so that the electrical connection with the second pole assembly 50 of the second battery 2 can be easily achieved.

[0093] It should be noted that the side-by-side arrangement of the first battery 1 and the second battery 2 means that the first battery 1 and the second battery 2 are grouped. At this time, the first battery 1 and the second battery 2 can be stacked up and down or arranged left and right, which is not limited here.

[0094] It should be noted that the second section 32 of the first busbar 30 can be directly electrically connected with the second pole assembly 50 of the second battery 2, i.e. the second battery 2 does not need to be provided with a busbar. For example, the second section 32 of the first busbar 30 can be directly extended to the second pole assembly 50 for connection. When the first pole assembly 20 and the second pole assembly 50 are directly opposite, the second section 32 can be directly extended to the second pole assembly 50. At this time, the second section 32 does not need to be too long to achieve the connection.

[0095] The first battery 1 comprises a first battery body 10, which comprises two opposite first surfaces 12 and four second surfaces 13 arranged around the first surfaces 12. The second battery 2 comprises a second battery body 40, and the second pole assembly 50 is arranged on the second battery body 40. The second battery body 40 comprises two opposite third surfaces 42 and four fourth surfaces 43 arranged around the third surfaces 42. In one embodiment, as shown in Figure 4 and Figure 5 The second battery 2 further comprises a second busbar 60, and the second pole assembly 50 is connected with the second section 32 through the second busbar 60, so as to facilitate the connection and be conducive to the arrangement of the components, and the space of the battery pack can be effectively utilized.

[0096] In one embodiment, the second battery 2 comprises two opposite third surfaces 42 and four fourth surfaces 43 arranged around the third surfaces 42. The area of the third surface 42 is greater than that of the fourth surface 43, and the second pole assembly 50 is arranged on the third surface 42, i.e. the second pole assembly 50 is arranged on the large surface of the second battery 2, so as to ensure that the second pole assembly 50 has a reliable supporting surface, thereby ensuring the stability of the second pole assembly 50.

[0097] Further, as shown in Figure 5As shown, the second busbar 60 is bent into a third segment 61 and a fourth segment 62, the third segment 61 is located on one side of the third surface 42 where the second pole assembly 50 is arranged, and is connected with the second pole assembly 50, and the fourth segment 62 is parallel to a fourth surface 43, and is connected with the second segment 32. The bending of the first busbar 30 and the second busbar 60 can facilitate the connection of the second segment 32 and the fourth segment 62, and is conducive to quickly completing the connection of the second segment 32 and the fourth segment 62.

[0098] It should be noted that the first surface 12 of the first battery 1 and the third surface 42 of the second battery 2 are oppositely arranged, that is, when the first battery 1 and the second battery 2 are grouped, the first pole assembly 20 and the second pole assembly 50 can be directly opposite, at this time, the first busbar 30 and the second busbar 60 are directly opposite, and the distance between the second segment 32 and the fourth segment 62 is relatively close.

[0099] In one embodiment, the first pole assembly 20 is arranged on a first surface 12 away from the second battery 2, and the second pole assembly 50 is arranged on a third surface 42 close to the first battery 1, that is, the first pole assembly 20 and the second pole assembly 50 actually hold the first battery body 10.

[0100] Optionally, the first pole assembly 20 is arranged on another first surface 12 close to the second battery 2, and the second pole assembly 50 is arranged on another third surface 42 away from the first battery 1, that is, the first pole assembly 20 and the second pole assembly 50 actually hold the second battery body 40.

[0101] The first pole assembly 20 and the second pole assembly 50 in the above embodiment are not directly opposite, which can make the arrangement of the battery pack more reasonable, and the distance between the first busbar 30 and the second busbar 60 will not be too large.

[0102] Further, as shown in Figure 5 and Figure 6 The first battery body 10 can be provided with a first recess 11, and the first recess 11 and the first pole assembly 20 can be located on two first surfaces 12 respectively, at this time, the first recess 11 can be used to accommodate the second pole assembly 50 of the second battery 2. The projection of the first recess 11 and the first pole assembly 20 along the direction perpendicular to the first battery body 10 at least partially coincides, so that when the first battery 1 and the second battery 2 are grouped, the first battery 1 and the second battery 2 can be aligned with each other, and it can be ensured that the second pole assembly 50 can be reliably received in the first recess 11.

[0103] Optionally, as shown in Figure 5As shown, the second battery body 40 can also be provided with a second recess 41, at this time, the second recess 41 can be used to accommodate the pole assembly of the third battery, which is not limited here, and the emphasis is that if the pole assembly of the battery protrudes from the battery body, a recess can be provided on the other battery to accommodate the pole assembly adjacent thereto, so as to minimize the distance between the batteries and improve the energy density of the battery pack.

[0104] In one embodiment, the second section 32 is located outside the first surface 12 in the normal projection on the plane where the first surface 12 is located, and the fourth section 62 is located outside the third surface 42 in the normal projection on the plane where the third surface 42 is located, i.e., the second section 32 and the fourth section 62 are connected outside the circumferential edge of the battery, so as not to occupy the space between the batteries, thereby ensuring the energy density of the battery and facilitating connection.

[0105] Optionally, the first bus bar 30 is bent towards the direction close to the first surface 12, and the second bus bar 60 is bent towards the direction away from the third surface 42. The fourth section 62 and the second section 32 are connected through the adapter piece 70, i.e., the fourth section 62 and the adapter piece 70 are connected, and the second section 32 and the adapter piece 70 are connected, as shown in Figure 8 Alternatively, the fourth section 62 and the second section 32 can be directly welded, as shown in Figure 9 .

[0106] Optionally, the first bus bar 30 is bent towards the direction away from the first surface 12, and the second bus bar 60 is bent towards the direction away from the third surface 42. The fourth section 62 and the second section 32 are connected through the adapter piece 70, i.e., the fourth section 62 and the adapter piece 70 are connected, and the second section 32 and the adapter piece 70 are connected, as shown in Figure 10 Alternatively, the fourth section 62 and the second section 32 can be directly welded, as shown in Figure 11 .

[0107] Optionally, the first bus bar 30 is bent towards the direction close to the first surface 12, and the second bus bar 60 is bent towards the direction away from the third surface 42, i.e., the distance between the fourth section 62 and the second section 32 is minimized. The fourth section 62 and the second section 32 are connected through the adapter piece 70, i.e., the fourth section 62 and the adapter piece 70 are connected, and the second section 32 and the adapter piece 70 are connected. Alternatively, the fourth section 62 and the second section 32 can be directly welded, wherein, as shown in Figure 12 the fourth section 62 and the second section 32 can also be overlapped, or the fourth section 62 and the second section 32 can be directly butted, i.e., the end face of the fourth section 62 and the end face of the second section 32 are directly butted, as shown in Figure 13 . The first bus bar 30 and the second bus bar 60 form a U-shaped structure.

[0108] Optionally, the first bus bar 30 is bent towards the direction away from the first surface 12, and the second bus bar 60 is bent towards the direction close to the third surface 42, that is, the distance between the fourth section 62 and the second section 32 reaches the maximum, and the fourth section 62 and the second section 32 are connected through the adapter piece 70, that is, the fourth section 62 and the adapter piece 70 are connected, and the second section 32 and the adapter piece 70 are connected.

[0109] It should be noted that the connection mode of the fourth section 62 and the second section 32 is not limited here and can be selected according to actual needs. When the adapter piece 70 is selected, the adapter piece 70 is a metal piece, which is not only convenient for welding but also has strong welding reliability.

[0110] It should be noted that for the connection of the fourth section 62 and the second section 32, the fourth section 62 and the second section 32 can be directly connected, and of course, the fourth section 62 and the second section 32 can also be overlapped, which is not limited here.

[0111] In one embodiment, the fourth section 62 and the second section 32 are overlapped, the fourth section 62 is located outside the second section 32, and the thickness of the welding part of the fourth section 62 and the second section 32 is less than the thickness of the third section 61 or the thickness of the second bus bar 60 is less than the thickness of the first bus bar 30, so that the welding of the fourth section 62 and the second section 32 can be conveniently realized. Specifically, it can be understood that the fourth section 62 is subjected to a connection thinning process, so that the welding energy can quickly form a weld between the fourth section 62 and the second section 32.

[0112] It should be noted that the second bus bar 60 can be partially thinned only on the fourth section 62, as shown in Figure 15 Of course, the fourth section 62 can also be thinned as a whole. Of course, the overall thickness of the second bus bar 60 can be less than the thickness of the first bus bar 30, which is similar to that the second bus bar 60 is thinned as a whole, as shown in Figure 14

[0113] Optionally, the fourth section 62 and the second section 32 are overlapped, the fourth section 62 is located inside the second section 32, and the thickness of the welding part of the second section 32 and the fourth section 62 is less than the thickness of the first section 31 or the thickness of the first bus bar 30 is less than the thickness of the second bus bar 60, so that the welding of the second section 32 and the fourth section 62 can be conveniently realized. Specifically, it can be understood that the second section 32 is subjected to a connection thinning process, so that the welding energy can quickly form a weld between the second section 32 and the fourth section 62.

[0114] It should be noted that the first bus bar 30 can be partially thinned only on the second section 32, and of course, the second section 32 can also be thinned as a whole. Of course, the overall thickness of the first bus bar 30 can be less than the thickness of the second bus bar 60, which is similar to that the first bus bar 30 is thinned as a whole.​

[0115] Optionally, the first battery body 10 is approximately a rectangular structure, i.e. the first battery body 10 can be a rectangular structure, ignoring the manufacturing error, etc. Correspondingly, the second battery body 40 is approximately a rectangular structure.

[0116] The first pole assembly 20 is two, the first busbar 30 is also two, two first busbars 30 are connected to two first pole assemblies 20 respectively, the second pole assembly 50 is two, the second busbar 60 is two, two second busbars 60 are connected to two second pole assemblies 50 respectively. The first battery 1 and the second battery 2 can be in series, then one first pole assembly 20 is connected with one second pole assembly 50, and the other first pole assembly 20 can be connected with a third battery. Correspondingly, the other second pole assembly 50 can be connected with a fourth battery. The first battery 1 and the second battery 2 can be in parallel, then one first pole assembly 20 is connected with one second pole assembly 50, and the other first pole assembly 20 can be connected with the other second pole assembly 50. The connection relationship between the batteries of the battery pack is not limited here, and can be connected in series and in parallel according to actual needs.

[0117] In an embodiment, the first segment 31 and the first pole assembly 20 are at least partially overlapped in the orthographic projection on the first surface 12, i.e. the first segment 31 and the first pole assembly 20 can be directly connected, and the connection is extremely convenient.

[0118] The third segment 61 and the second pole assembly 50 are at least partially overlapped in the orthographic projection on the third surface 42, i.e. the third segment 61 and the second pole assembly 50 can be directly connected, and the connection is extremely convenient.

[0119] Optionally, the first segment 31 and the first pole assembly 20 are not overlapped in the orthographic projection on the first surface 12, i.e. the first segment 31 and the pole assembly 110 can be connected through a metal connecting piece.

[0120] The third segment 61 and the second pole assembly 50 are not overlapped in the orthographic projection on the third surface 42, i.e. the third segment 61 and the second pole assembly 50 can be connected through a metal connecting piece.

[0121] In an embodiment, as shown in Figure 10 The first battery body 10 includes: the cell 14 connected with the first pole assembly 20; the shell 15, the cell 14 is located in the shell 15; wherein the first recess 11 and the first pole assembly 20 are both arranged on the shell 15, which is not only convenient for installation but also relatively simple in structure, and the shell 15 can be used for installation of the first pole assembly 20.

[0122] In an embodiment, as shown inFigure 6 and Figure 7 As shown, the housing 15 includes: a first housing component 151; and a second housing component 152, which is connected to the first housing component 151 to enclose the battery cell 14. The first housing component 151 and the second housing component 152 are respectively provided, which facilitates the installation of the battery cell 14 and makes the processing easier.

[0123] Optionally, both the first housing member 151 and the second housing member 152 may have a receiving cavity 153. After the first housing member 151 and the second housing member 152 are connected, the battery cell 14 is located in the cavity formed by the two receiving cavities 153. The depth of the receiving cavity 153 of the first housing member 151 and the second housing member 152 may be the same or different, which is not limited here.

[0124] Optionally, the first housing component 151 is a flat plate, and the second housing component 152 forms a receiving cavity 153, in which the battery cell 14 is located. The flat plate design facilitates subsequent connection and reduces processing difficulty.

[0125] Furthermore, the second housing member 152 has a flange 154 on its circumferential edge. The first housing member 151 is welded to the flange 154, thereby ensuring reliable welding of the first housing member 151 and the second housing member 152 and providing connection stability. The flange 154 is mainly provided to increase the welding area, thereby improving welding stability.

[0126] Optionally, when the first housing member 151 has a receiving cavity 153, the circumferential edge of the first housing member 151 may also be provided with a flange 154, and the flange 154 of the first housing member 151 is welded to the flange 154 of the second housing member 152.

[0127] In one embodiment, such as Figure 7 As shown, the battery cell 14 includes a battery cell body 141 and a tab 142. The tab 142 extends out from the length direction of the battery cell body 141. The tab 142 is connected to the first terminal assembly 20. At this time, the first terminal assembly 20 can be set at the end of the first battery body 10 to facilitate connection and make full use of the length space of the battery.

[0128] It should be noted that the structure and arrangement of the second battery body 40 and the second terminal assembly 50 can be referred to the first terminal assembly 20 and the first battery body 10 described above, and will not be repeated here. In some embodiments, it is not excluded that the first battery 1 and the second battery 2 have the same structure.

[0129] It is important to note that, in combination Figures 8 to 15As shown, the busbar (the first busbar 30 and / or the second busbar 60) is spaced apart from the battery side (the second surface 13 and / or the fourth surface 43) to ensure reliable electrical isolation and to provide a gap for the fixture to enter during welding. Alternatively, the busbar and the battery side can be in direct contact, i.e., the two can be insulated by a coating.

[0130] In one embodiment, the battery pack can further include a third battery, which can be one or at least two. The third battery can have a structure similar to or identical to the first battery 1 and the second battery 2, which will not be described herein.

[0131] In one embodiment, the first battery 1 has a length d, 400mm≤d≤2500mm, a width e, and a height f, 2e≤d≤50e, and / or 0.5f≤e≤20f.

[0132] Alternatively, the second battery 2 has a length d, 400mm≤d≤2500mm, a width e, and a height f, 2e≤d≤50e, and / or 0.5f≤e≤20f.

[0133] In one embodiment, the first battery 1 has a length d, a width e, and a height f, 4e≤d≤7e, and / or 3f≤e≤7f.

[0134] Alternatively, the second battery 2 has a length d, a width e, and a height f, 4e≤d≤7e, and / or 3f≤e≤7f.

[0135] In one embodiment, the first battery 1 is a laminated battery, and the second battery 2 is a laminated battery, which not only facilitates grouping, but also allows the manufacture of a battery with a longer length.

[0136] It should be noted that the structure of the first battery 1 and the second battery 2 in the present embodiment can refer to the specific structure of the battery in the above embodiments, which will not be described herein.

[0137] It should be noted that the battery pack described above can be a battery module or a battery pack.

[0138] Alternatively, the battery pack includes at least two battery packs, and the battery pack can further include a box, and the at least two battery packs are arranged in the box. Alternatively, the plurality of batteries can be directly arranged in the box, i.e., the grouping process is cancelled.

[0139] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the concepts disclosed herein. It is intended that the disclosure be construed as including any paterns of this disclosure that can be presented during prosecution of the patent application. Specification and drawings are, therefore, to be regarded in an illustrative rather than a restrictive sense. The true scope and spirit of the disclosure are indicated by the appended claims.

[0140] It is to be understood that the disclosure is not limited to the precise construction hereinafter described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the disclosure. The scope of the disclosure is limited only by the claims that follow.

Claims

1. A battery, characterized in that, include: Two opposing first surfaces (12) and four second surfaces (13) arranged around the first surfaces (12), wherein the area of ​​the first surfaces (12) is larger than the area of ​​the second surfaces (13); A pole post assembly (110) is disposed on the first surface (12); The busbar (120) is bent into a first segment (31) and a second segment (32). The first segment (31) is located on one side of the first surface (12) on which the terminal assembly (110) is provided, and is connected to the terminal assembly (110). The second segment (32) is parallel to a second surface (13) and is used to electrically connect the terminal assembly of another battery. The first segment (31) and the second segment (32) are perpendicular. There are two pole post assemblies (110) and two busbars (120). The two busbars (120) are respectively connected to the two pole post assemblies (110), and the two pole post assemblies (110) are disposed on the same first surface (12). The busbar (120) on one of the pole assembly (110) is bent toward the direction away from the first surface (12), and the busbar (120) on the other pole assembly (110) is bent toward the direction close to the first surface (12).

2. The battery according to claim 1, characterized in that, The orthographic projection of the second segment (32) onto the plane containing the first surface (12) is located outside the first surface (12); The busbar (120) is bent toward the direction away from the first surface (12); or, the busbar (120) is bent toward the direction close to the first surface (12).

3. The battery according to claim 1, characterized in that, The first segment (31) is welded to the pole assembly (110).

4. The battery according to claim 3, characterized in that, The thickness of the first segment (31) welded to the pole assembly (110) is less than the thickness of the second segment (32).

5. The battery according to claim 1, characterized in that, The busbar (120) and the pole assembly (110) are integrally formed.

6. The battery according to any one of claims 1 to 5, characterized in that, The first segment (31) and the pole assembly (110) at least partially overlap in orthographic projection on a first surface (12).

7. The battery according to any one of claims 1 to 5, characterized in that, The battery has a length of a, a width of b, and a height of c, where 2b ≤ a ≤ 50b, and / or 0.5c ≤ b ≤ 20c; 400mm≤a≤2500mm.

8. A battery pack, characterized in that, It includes a first battery (1) and a second battery (2), wherein the first battery (1) includes: Two opposing first surfaces (12) and four second surfaces (13) arranged around the first surfaces (12), wherein the area of ​​the first surfaces (12) is larger than the area of ​​the second surfaces (13); The first pole post assembly (20) is disposed on the first surface (12); The first busbar (30) is bent into a first segment (31) and a second segment (32). The first segment (31) is located on one side of the first surface (12) on which the first pole assembly (20) is provided, and is connected to the first pole assembly (20). The second segment (32) is parallel to a second surface (13), and the first segment (31) and the second segment (32) are perpendicular. The second battery (2) includes a second terminal assembly (50); The first battery (1) and the second battery (2) are arranged side by side so that the second segment (32) is connected to the second pole assembly (50); There are two first pole post assemblies (20) and two first busbars (30). The two first busbars (30) are respectively connected to the two first pole post assemblies (20), and the two first pole post assemblies (20) are disposed on the same first surface (12). The first busbar (30) on one of the first pole assembly (20) is bent toward the direction away from the first surface (12), and the first busbar (30) on the other first pole assembly (20) is bent toward the direction close to the first surface (12).

9. The battery pack according to claim 8, characterized in that, The second battery (2) also includes a second busbar (60), and the second terminal assembly (50) is connected to the second segment (32) through the second busbar (60).

10. The battery pack according to claim 9, characterized in that, The second battery (2) further includes two opposing third surfaces (42) and four fourth surfaces (43) arranged around the third surfaces (42), the area of ​​the third surfaces (42) being larger than the area of ​​the fourth surfaces (43), and the second electrode assembly (50) being disposed on the third surfaces (42); The second busbar (60) is bent into a third segment (61) and a fourth segment (62). The third segment (61) is located on one side of the third surface (42) on which the second pole assembly (50) is provided, and is connected to the second pole assembly (50). The fourth segment (62) is parallel to a fourth surface (43) and is connected to the second segment (32).

11. The battery pack according to claim 10, characterized in that, The first terminal assembly (20) is disposed on a first surface (12) away from the second battery (2), and the second terminal assembly (50) is disposed on a third surface (42) close to the first battery (1); Alternatively, the first terminal assembly (20) is disposed on another first surface (12) near the second battery (2), and the second terminal assembly (50) is disposed on another third surface (42) away from the first battery (1).

12. The battery pack according to claim 11, characterized in that, The orthographic projection of the second segment (32) onto the plane of the first surface (12) is located outside the first surface (12), and the orthographic projection of the fourth segment (62) onto the plane of the third surface (42) is located outside the third surface (42). The first busbar (30) is bent away from the first surface (12), and the second busbar (60) is bent away from the third surface (42); or, the first busbar (30) is bent away from the first surface (12), and the second busbar (60) is bent closer to the third surface (42); or, the first busbar (30) is bent closer to the first surface (12), and the second busbar (60) is bent away from the third surface (42); or, the first busbar (30) is bent closer to the first surface (12), and the second busbar (60) is bent closer to the third surface (42).

13. The battery pack according to claim 12, characterized in that, The fourth segment (62) and the second segment (32) are directly welded; Alternatively, the battery pack may also include an adapter piece (70), to which both the fourth segment (62) and the second segment (32) are welded.

14. The battery pack according to claim 13, characterized in that, The fourth segment (62) and the second segment (32) are overlapped. The fourth segment (62) is located outside the second segment (32). The thickness of the welded part of the fourth segment (62) and the second segment (32) is less than the thickness of the third segment (61), or the thickness of the second busbar (60) is less than the thickness of the first busbar (30).

15. The battery pack according to claim 12, characterized in that, The fourth segment (62) and the second segment (32) are arranged in an overlapping manner. The fourth segment (62) is located inside the second segment (32). The thickness of the welded part of the second segment (32) and the fourth segment (62) is less than the thickness of the first segment (31), or the thickness of the first busbar (30) is less than the thickness of the second busbar (60).

16. The battery pack according to claim 10, characterized in that, The end face of the fourth segment (62) is directly connected to the end face of the second segment (32).

17. The battery pack according to any one of claims 10 to 16, characterized in that, The first segment (31) and the first pole post assembly (20) have at least partially overlapped orthographic projections on a first surface (12), and the third segment (61) and the second pole post assembly (50) have at least partially overlapped orthographic projections on a third surface (42).

18. The battery pack according to any one of claims 8 to 16, characterized in that, The length of at least one of the first battery (1) and the second battery (2) is d, the width of at least one of the first battery (1) and the second battery (2) is e, the height of at least one of the first battery (1) and the second battery (2) is f, 2e≤d≤50e, and / or, 0.5f≤e≤20f; 400mm≤d≤2500mm.

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