Battery and electric device

Abstract

The utility model discloses a battery and a power utilization device, and relates to the technical field of batteries, and the battery comprises a shell, a plurality of battery cells and lead-out sheets, a containing cavity is formed in the shell, a plurality of pole columns are arranged on the shell, and the pole columns are arranged in the first direction. The plurality of battery cells are arranged in the accommodating cavity and are stacked along the first direction; the lead-out sheet comprises a plurality of tab connecting parts and a plurality of pole connecting parts, the tab connecting parts are in one-to-one correspondence with the tabs of the battery cell and are connected, and the pole connecting parts are in one-to-one correspondence with the poles and are connected. Wherein the plurality of pole connecting parts are connected in series, and the plurality of tab connecting parts are connected to the plurality of pole connecting parts. Or the plurality of tab connecting parts are connected in series, and the plurality of pole connecting parts are connected to the plurality of tab connecting parts. According to the battery, the capacity and the maximum output current of the battery can be improved, and the output stability and reliability of the battery are improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, and particularly to a battery and an electric device. Background Art

[0002] Lithium-ion batteries are one of the key technologies for future new energy storage development due to their advantages such as high energy density, no memory effect, fast charge and discharge, fast response speed, flexible configuration, and short construction cycle. However, the demand in the energy storage market for higher energy density and longer cycle life has put forward higher requirements for the energy performance and safety performance of lithium-ion batteries. With the market demand for larger battery capacity, how to make the battery carry more energy more safely and transmit a larger current has gradually become the focus. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a battery, which can improve the capacity and maximum output current of the battery, and enhance the stability and reliability of the battery output.

[0004] The utility model also provides an electric device with the above battery.

[0005] The battery according to the embodiment of the utility model includes: a housing, a receiving cavity is arranged in the housing, a plurality of pole columns are arranged on the housing, and the plurality of pole columns are arranged along a first direction; a plurality of battery cells, the plurality of battery cells are arranged in the receiving cavity and stacked along the first direction; a lead-out sheet, the lead-out sheet includes a plurality of tab connection parts and a plurality of pole column connection parts, the tab connection parts correspond to and are connected to the tabs of the battery cells one by one, and the pole column connection parts correspond to and are connected to the pole columns one by one; wherein, the plurality of pole column connection parts are connected in series, and the plurality of tab connection parts are connected to the plurality of pole column connection parts; or, the plurality of tab connection parts are connected in series, and the plurality of pole column connection parts are connected to the plurality of tab connection parts.

[0006] According to the battery of the embodiments of the present utility model, by arranging the lead-out piece to be electrically connected to a plurality of battery cells simultaneously through the tab connection part, the plurality of battery cells are connected in parallel to the lead-out piece, and a plurality of pole connection parts are connected to a plurality of poles simultaneously, so that the plurality of poles are also connected in parallel to the lead-out piece. The currents of the plurality of battery cells can flow into the lead-out piece simultaneously, reducing the resistance when the battery cells output current and increasing the current intensity on the lead-out piece. At the same time, the current on the lead-out piece can be output through a plurality of poles simultaneously, so that the plurality of poles can disperse the current load, increasing the overall current-carrying capacity of the plurality of poles. In addition, when a single pole has poor contact and cannot output current, the other poles can still output current, thereby reducing or avoiding the power-off risk caused by poor contact of the poles. Thus, by arranging the plurality of battery cells and the plurality of poles to be connected in parallel to the lead-out piece, the current intensity output by the battery cells can be increased and the capacity of the battery can be improved, and at the same time, the current-carrying capacity of the poles can be improved. Thereby, while increasing the output current of the battery, the stability and reliability of the output current of the battery are improved.

[0007] In some embodiments, the lead-out piece is arranged at one end of the battery cell along the second direction, and the projection of the tab connection part along the second direction is at least partially offset from the projection of the pole connection part along the second direction.

[0008] Further, the thickness of the tab connection part along the second direction is greater than the thickness of the pole connection part along the second direction.

[0009] In some embodiments, the tab connection part is in a plate shape, the pole connection part is in a plate shape, and there is an included angle between the tab connection part and the pole connection part.

[0010] In some embodiments, a plurality of the tab connection parts are arranged at intervals along the first direction, and a plurality of the pole connection parts are arranged at intervals along the first direction.

[0011] In some embodiments, the lead-out piece further includes a first interconnecting strip and a second interconnecting strip. The first interconnecting strip is connected to the tab connection part and the pole connection part at both ends respectively; the second interconnecting strip is connected to two of the tab connection parts at both ends respectively, or the second interconnecting strip is connected to two of the pole connection parts at both ends respectively.

[0012] In some embodiments, the lead-out piece is arranged on one side of the housing close to the battery cell. The housing is provided with a plurality of avoidance through holes arranged along the first direction, and the avoidance through holes correspond to the tabs of the battery cell one by one. The tabs of the battery cell and the tab connection part pass through the avoidance through holes.

[0013] Further, the battery further includes a cap, and the cap covers the avoidance through holes.

[0014] Further, a counterbore is provided on one side of the housing that surrounds the avoidance through-hole and is away from the battery cell, and the cap is partially disposed within the counterbore.

[0015] In some embodiments, the housing includes an end cap, the pole is disposed on the end cap, and the lead-out piece is connected to one side of the end cap close to the battery cell.

[0016] Further, the battery further includes: an insulating member, the insulating member is disposed on one side of the end cap close to the battery cell, the ear connection portion passes through the insulating member, and the pole connection portion is disposed on one side of the insulating member away from the end cap.

[0017] In some embodiments, a plurality of explosion-proof valves are provided on the housing, and the plurality of explosion-proof valves are arranged along the first direction.

[0018] In some embodiments, the ears of the battery cell include a plurality of positive ears and a plurality of negative ears respectively disposed at two ends in the second direction; a plurality of positive poles and negative poles are respectively provided on two end faces of the housing in the second direction, and the plurality of positive poles and the plurality of negative poles are respectively arranged along the first direction; the battery includes two lead-out pieces, and the two lead-out pieces are respectively disposed at two ends of the battery cell along the second direction.

[0019] In some embodiments, the ears of the battery cell include a plurality of positive ears and a plurality of negative ears disposed at the same end in the second direction, and the plurality of positive ears and the plurality of negative ears are respectively arranged along the first direction; a plurality of positive poles and negative poles are provided on the same end face of the housing in the second direction, and the plurality of positive poles and the plurality of negative poles are respectively arranged along the first direction; the battery includes two lead-out pieces, one lead-out piece connects the positive ears and the positive poles, and the other lead-out piece connects the negative ears and the negative poles.

[0020] The electrical device according to an embodiment of the present invention includes the battery described in the above embodiment.

[0021] The electrical device according to an embodiment of the present invention, by adopting the battery of the above embodiment, the battery has a plurality of battery cells and a plurality of poles all connected in parallel to the lead-out piece, can increase the current intensity output by the battery cells and improve the capacity of the battery, and at the same time can improve the current-carrying capacity of the poles. Thus, while increasing the output current of the battery, the stability and reliability of the output current of the battery are improved.

[0022] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0023] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0024] Figure 1 is an exploded view of a battery according to a first embodiment of the present utility model;

[0025] Figure 2 is Figure 1 a three-dimensional structure diagram of the battery of the illustrated embodiment;

[0026] Figure 3 is Figure 1 a sectional structure diagram of the battery of the illustrated embodiment;

[0027] Figure 4 is Figure 1 a structural schematic diagram of a lead-out tab of the battery of the illustrated embodiment;

[0028] Figure 5 is Figure 1 a structural schematic diagram of an end cap of the battery of the illustrated embodiment;

[0029] Figure 6 is a structural schematic diagram of a battery according to a second embodiment of the present utility model;

[0030] Figure 7 is a structural schematic diagram of a battery according to a third embodiment of the present utility model;

[0031] Figure 8 is a structural schematic diagram of a lead-out tab according to a second embodiment of the present utility model;

[0032] Figure 9 is a structural schematic diagram of a battery according to a fourth embodiment of the present utility model;

[0033] Figure 10 is a schematic diagram of the arrangement of pole columns of a battery according to a fifth embodiment of the present utility model.

[0034] Reference numerals:

[0035] battery 100,

[0036] housing 10, accommodation cavity 11, end cap 12, avoidance through hole 13, counterbore 14, insulating member 15, explosion-proof valve 16, liquid injection hole 17, pole column 20, positive pole column 21, negative pole column 22, battery cell 30, pole ear 31, lead-out tab 40, pole ear connection portion 41, pole column connection portion 42, first interconnection bar 43, second interconnection bar 44, cap 50. Detailed implementation manners

[0037] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0038] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0039] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0040] The battery 100 and the electrical device according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0041] As Figures 1-4 shown, the battery 100 according to an embodiment of the present utility model includes: a housing 10, a plurality of battery cells 30 and a lead-out sheet 40. A receiving cavity 11 is provided inside the housing 10, and a plurality of pole columns 20 are provided on the housing 10, and the plurality of pole columns 20 are arranged in a first direction. The plurality of battery cells 30 are disposed in the receiving cavity 11 and stacked in the first direction. The lead-out sheet 40 includes a plurality of tab connection portions 41 and a plurality of pole-column connection portions 42. The tab connection portions 41 correspond to and are connected to the tabs 31 of the battery cells 30 one by one, and the pole-column connection portions 42 correspond to and are connected to the pole columns 20 one by one.

[0042] Among them, multiple pole connection parts 42 are connected in series, and multiple tab connection parts 41 are connected to the multiple pole connection parts 42. Alternatively, multiple tab connection parts 41 are connected in series, and multiple pole connection parts 42 are connected to the multiple tab connection parts 41.

[0043] It can be understood that multiple tabs 31 are respectively connected to the multiple tab connection parts 41 one by one. As Figure 4 shown, when the multiple pole connection parts 42 are connected in series, the multiple tab connection parts 41 are respectively connected to the multiple pole connection parts 42, forming a parallel connection between the multiple tab connection parts 41, and a parallel connection between the multiple tabs 31. At this time, the multiple poles 20 are respectively connected to the pole connection parts 42, forming a parallel connection between the multiple poles 20.

[0044] As Figure 8 shown, when the multiple tab connection parts 41 are connected in series, the multiple tabs 31 are respectively connected to the multiple tab connection parts 41, forming a parallel connection between the multiple tabs 31. At this time, the multiple pole connection parts 42 are respectively connected to the multiple tab connection parts 41, forming a parallel connection between the multiple pole connection parts 42, and thus a parallel connection between the multiple tabs 31.

[0045] Thus, by arranging the lead-out piece 40 to be electrically connected to multiple battery cells 30 simultaneously through the tab connection parts 41, the multiple battery cells 30 are connected in parallel to the lead-out piece 40, and the multiple pole connection parts 42 are simultaneously connected to the multiple poles 20, so that the multiple poles 20 are also connected in parallel to the lead-out piece 40. The currents of the multiple battery cells 30 can flow into the lead-out piece 40 simultaneously, reducing the resistance when the battery cells 30 output current and increasing the current intensity on the lead-out piece 40. At the same time, the current on the lead-out piece 40 can be output through the multiple poles 20 simultaneously, so that the multiple poles 20 can disperse the current load and increase the overall current-carrying capacity of the multiple poles 20.

[0046] In addition, when a single pole 20 has poor contact and cannot output current, the other poles 20 can still output current, thereby reducing or avoiding the power-off risk caused by poor contact of the poles 20.

[0047] For the battery 100 of the present application, by arranging the multiple battery cells 30 and the multiple poles 20 to be connected in parallel to the lead-out piece 40, the current intensity output by the battery cells 30 can be increased and the capacity of the battery 100 can be improved, and at the same time, the current-carrying capacity of the poles 20 can be improved. Thus, while increasing the output current of the battery 100, the stability and reliability of the output current of the battery 100 are improved.

[0048] In the present application, the connection manner between the tab 31 and the tab connection part 41 is not limited. For example, the tab 31 and the tab 31 are connected by any one of laser welding, ultrasonic welding, pulse welding, adhesive bonding, etc. Among them, laser welding is preferably used.

[0049] Preferably, when multiple pole connection parts 42 are connected in series, the number of pole connection parts 42 is less than or equal to the number of pole connection parts 42. When the number of pole connection parts 42 is equal to the number of tab connection parts 41, the pole connection parts 42 and the tab connection parts 41 are connected in one-to-one correspondence. When the number of pole connection parts 42 is less than the number of tab connection parts 41, multiple tab connection parts 41 are evenly distributed and connected to multiple pole connection parts 42.

[0050] Furthermore, when the number of tab connection parts 41 is an integer multiple of the number of pole connection parts 42, the number of tab connection parts 41 connected to each pole connection part 42 is the same, thereby improving the current consistency of different pole connection parts 42, that is, improving the current consistency between multiple poles 20.

[0051] Preferably, when multiple tab connection parts 41 are connected in series, the number of tab connection parts 41 is equal to the number of pole connection parts 42, and the pole connection parts 42 and the tab connection parts 41 are connected in one-to-one correspondence, thereby improving the current consistency of different pole connection parts 42, that is, improving the current consistency between multiple poles 20.

[0052] For example, in Figure 6 's example, the number of poles 20 and the number of tabs 31 are both four. Correspondingly, the tab connection parts 41 and the pole connection parts 42 of the lead-out piece 40 are both four and are connected in one-to-one correspondence.

[0053] Another example is that in Figure 7 's example, the number of poles 20 is two, and the number of tabs 31 is four. Correspondingly, the number of tab connection parts 41 of the lead-out piece 40 is four, and the number of pole connection parts 42 is two. Each pole connection part 42 is correspondingly connected to two tab connection parts 41.

[0054] In some embodiments, as Figure 1 shown, the housing 10 is a cuboid, and the battery cell 30 is also a cuboid. The tabs 31 are provided at at least one end of the battery cell 30 along the second direction. The dimension of the housing 10 along the first direction is D, the dimension of the housing 10 along the second direction is L, and the dimension of the housing 10 along the third direction (not shown in the figure) is H. The first direction, the second direction, and the third direction are perpendicular to each other pairwise. Among them, L, D, and H simultaneously satisfy the following relational expressions: 100 mm ≤ L ≤ 2000 mm, 100 mm ≤ D ≤ 6000 mm, H > 50 mm, and 2 ≤ L / H ≤ 200, 2 ≤ D / H ≤ 200.

[0055] In some embodiments, as Figure 1 , Figure 4 and Figure 8As shown, the lead piece 40 is provided at one end of the battery cell 30 along the second direction. The projection of the tab connection portion 41 along the second direction and the projection of the terminal connection portion 42 along the second direction are at least partially staggered, which can reduce or avoid the terminal connection portion 42 from blocking the connection between the tab connection portion 41 and the tab 31, and can also reduce or avoid the tab connection portion 41 from blocking the connection of the terminal 20 at the terminal connection portion 42, improving the connection reliability between the tab connection portion 41 and the tab 31, as well as the connection reliability of the terminal 20 at the terminal connection portion 42.

[0056] Further, the thickness of the tab connection portion 41 along the second direction is greater than the thickness of the terminal connection portion 42 along the second direction.

[0057] It should be noted that the tab connection portion 41 is connected to the tab 31 on the side parallel to the second direction.

[0058] Thus, a relatively large connection area can be provided between the tab connection portion 41 and the tab 31, improving the connection reliability between the tab connection portion 41 and the tab 31, and increasing the current-carrying area between the tab 31 and the tab connection portion 41, improving the maximum current that can be conducted between the tab 31 and the tab connection portion 41.

[0059] In this application, the shapes of the tab connection portion 41 and the terminal connection portion 42 are not limited. For example, the tab connection portion 41 is provided in a columnar shape.

[0060] In some embodiments, the tab connection portion 41 is provided in a plate shape, the terminal connection portion 42 is in a plate shape, and an included angle is provided between the tab connection portion 41 and the terminal connection portion 42.

[0061] Thus, while the terminal 20 and the terminal connection portion 42 have sufficient area, the volume of the terminal connection portion 42 can be reduced, thereby reducing or avoiding the occupation of the space in the accommodation cavity 11 by the terminal connection portion 42, which is beneficial to reducing the volume of the battery 100.

[0062] Preferably, as Figure 4 、 Figure 8 shown, the included angle between the tab connection portion 41 and the terminal connection portion 42 is 90°, that is, the tab connection portion 41 and the terminal connection portion 42 are perpendicular to each other.

[0063] In some embodiments, as Figure 4 、 Figure 8 shown, a plurality of tab connection portions 41 are arranged at intervals along the first direction, and a plurality of terminal connection portions 42 are arranged at intervals along the first direction.

[0064] Thus, the arrangement direction of the plurality of tab connection portions 41 is consistent with the stacking direction of the battery cell 30, which can reduce the distance between the tab connection portion 41 and the battery cell 30, facilitating the connection of the tab 31 to the tab connection portion 41.

[0065] Meanwhile, arranging the plurality of pole connection parts 42 in the same direction as the plurality of tab connection parts 41 can reduce the distance between the pole connection part 42 and the tab connection part 41, that is, reduce the length of the connection structure between the pole connection part 42 and the tab connection part 41, thereby improving the stability of current conduction between the pole connection part 42 and the tab connection part 41 and reducing the resistance of current conduction between the pole connection part 42 and the tab connection part 41.

[0066] Preferably, as Figure 4 , Figure 8 shown, the plurality of tab connection parts 41 are located on the same side of the plurality of pole connection parts 42.

[0067] In some embodiments, as Figure 4 , Figure 8 shown, the lead-out piece 40 further includes a first interconnecting strip 43 and a second interconnecting strip 44. The first interconnecting strip 43 is connected to the tab connection part 41 and the pole connection part 42 at both ends respectively. The second interconnecting strip 44 is connected to two tab connection parts 42 at both ends respectively to realize the series connection of the plurality of tab connection parts 42, or the second interconnecting strip 44 is connected to two pole connection parts 41 at both ends respectively to realize the series connection of the plurality of pole connection parts 41.

[0068] Thus, the plurality of tab connection parts and the plurality of pole connection parts can be electrically connected through the first interconnecting strip 43 and the second interconnecting strip 44 to form a path, so that the plurality of battery cells 30 and the plurality of poles 20 can be connected in parallel through the lead-out piece 40.

[0069] In some embodiments, as Figures 1-3 shown, the lead-out piece 40 is arranged on one side of the housing 10 close to the battery cell 30. The housing 10 is provided with a plurality of avoidance through-holes 13 arranged along the first direction. The avoidance through-holes 13 correspond to the tabs 31 of the battery cell 30 one by one. The tabs 31 of the battery cell 30 and the tab connection parts 41 are inserted through the avoidance through-holes 13.

[0070] It should be noted that the tabs 31 of the electrode and the tab connection parts 41 are inserted through the avoidance through-holes 13 while being connected to each other one by one.

[0071] Thus, the tabs 31 of the battery cell 30 can pass through the housing 10 through the avoidance through-holes 13, and the connection positions of the tabs 31 and the tab connection parts 41 can also be located inside the avoidance through-holes 13 or on the side of the avoidance through-holes 13 away from the housing 10, thereby reducing the space occupied by the tabs 31 and the tab connection parts 41 inside the housing 10, increasing the space occupancy ratio of the battery cell 30 inside, being beneficial to improving the space utilization rate inside the housing 10, and improving the capacity of the battery 100 per unit volume.

[0072] Preferably, in the thickness direction of the pole connecting portion 42 , the size of the pole lug connecting portion 41 is larger than the size of the pole connecting portion 42 , so that the pole lug connecting portion 41 can be inserted into the avoidance through hole 13 .

[0073] Preferably, the number of the avoidance through holes 13 is consistent with the number of the tabs 31 of the battery cell 30 , and a pair of connected tabs 31 of the battery cell 30 and the tab connecting portion 41 are penetrated in each avoidance through hole 13 .

[0074] Furthermore, the battery 100 further includes a cap 50 , and the cap 50 is disposed on the avoidance through hole 13 .

[0075] Therefore, the cap 50 can cover the pole lug 31 and the pole lug connecting portion 41 while covering the avoidance through hole 13, thereby protecting the pole lug 31 and the pole lug connecting portion 41, reducing or avoiding damage to the pole lug 31 and the pole lug connecting portion 41 under the action of external force, and ensuring the stability of the connection between the pole lug 31 and the pole lug connecting portion 41, that is, improving the current output stability of the battery 100.

[0076] Preferably, a cavity is provided in the cap 50 , and the cavity is connected to the interior of the housing 10 through the avoidance through hole 13 .

[0077] In the present application, there is no limitation on the material of the cap 50. The cap 50 can be made of metal such as aluminum and copper, or rubber such as silicone rubber, chloroprene rubber, nitrile rubber, or plastic such as PE, PET, PA, or composite materials such as aluminum-plastic shell.

[0078] Preferably, the cap 50 is made of aluminum metal so as to have higher heat dissipation performance.

[0079] Thus, the cavity in the cap 50 is connected to the shell 10 through the avoidance through hole 13. When the battery cell 30 expands during long-term use, the gas generated by the expansion of the battery cell 30 can flow from the shell 10 to the cavity of the cap 50, so that the gas generated by the battery cell 30 can be gathered in the cap 50, slowing down the expansion of the shell 10 and improving the reliability and stability of the battery 100 under long-term use.

[0080] In addition, the cavity can also provide a space for accommodating the tab 31 and the tab connecting portion 41 .

[0081] Furthermore, a sink 14 is disposed on one side of the housing 10 surrounding the avoidance through hole 13 and away from the battery cell 30 , and a portion of the cap 50 is disposed in the sink 14 .

[0082] Thus, the sunken platform 14 can limit the position of the cap 50 relative to the avoidance through-hole 13, improving the stability of the cap 50 covering the avoidance through-hole 13. At the same time, when the cap 50 is covered on the avoidance through-hole 13, the avoidance through-hole 13 can guide the covering position of the cap 50, reducing the installation operation difficulty of covering the cap 50 on the avoidance through-hole 13.

[0083] It should be noted that in this application, the number of caps 50 provided on the housing 10 is not limited. The number of caps 50 is set according to the number of avoidance through-holes 13, and the number of avoidance through-holes 13 can be set according to the number of tab ears 31 and tab ear connection parts 41. Preferably, the numbers of the cap 50, the avoidance through-hole 13, the tab ear 31, and the tab ear connection part 41 are the same.

[0084] For example, in Figure 6 the example, the numbers of the pole columns 20 and the tab ears 31 are both four. Correspondingly, the numbers of the avoidance through-holes 13 and the caps 50 are both four. Another example is that in Figure 7 the example, the number of the pole columns 20 is two, and the number of the tab ears 31 is four. Correspondingly, the numbers of the avoidance through-holes 13 and the caps 50 are both four.

[0085] In some embodiments, as Figures 1-3 and Figure 5 shown, the housing 10 includes an end cap 12. The pole column 20 is provided on the end cap 12, and the lead-out piece 40 is connected to the side of the end cap 12 close to the battery cell 30. It should be noted that the housing 10 has an opening, and the end cap 12 covers the opening.

[0086] Thus, when assembling the battery 100, the battery cell 30 can be placed into the housing 10 through the opening, facilitating the setting of the battery cell 30. Preferably, the avoidance through-hole 13, the cap 50, and the pole column 20 are all provided on the end cap 12.

[0087] In this application, the material of the end cap 12 is not limited. The end cap 12 can be made of metals such as aluminum and copper, or rubbers such as silicone rubber, neoprene rubber, and nitrile rubber, or plastics such as PE, PET, and PA, or composite materials such as aluminum-plastic shells.

[0088] Preferably, the end cap 12 is made of aluminum metal material, making it have high heat dissipation performance.

[0089] Furthermore, as Figure 3 shown, the housing 10 further includes: an insulating member 15. The insulating member 15 is provided on the side of the end cap 12 close to the battery cell 30. The tab ear connection part 41 passes through the insulating member 15, and the pole column connection part 42 is provided on the side of the insulating member 15 away from the end cap 12.

[0090] Thus, the insulating member 15 is disposed between the battery cell 30 and the end cap 12 to provide insulation protection for the end cap 12, reducing or avoiding electric leakage at the end cap 12. The tab connecting portion 41 passes through the insulating member 15, which can increase the connection space between the tab 31 and the second connecting portion 41. The terminal connecting portion 42 is disposed on the side of the insulating member 15 away from the end cap 12, which can reduce or avoid electric leakage caused by the terminal connecting portion 42 contacting the end cap 12.

[0091] In some embodiments, a plurality of explosion-proof valves 16 are provided on the housing 10, and the plurality of explosion-proof valves 16 are arranged in the first direction. Thus, the arrangement direction of the explosion-proof valves 16 is the same as the stacking direction of the battery cells 30, so that the plurality of explosion-proof valves 16 can be arranged corresponding to different battery cells 30. When some of the battery cells 30 expand, causing the local air pressure at the nearby position to be too high, the battery 100 can explode at the explosion-proof valve 16 adjacent to the battery cell 30, enabling the explosion-proof valve 16 to explode in time and reducing or avoiding the risk of explosion of the battery 100.

[0092] In some embodiments, as Figure 9 shown, the tabs 31 of the battery cell 30 include a plurality of positive tabs and a plurality of negative tabs respectively provided at both ends in the second direction. A plurality of positive terminals 21 and negative terminals 22 are respectively provided at the two end faces of the housing 10 in the second direction, and the plurality of positive terminals 21 and the plurality of negative terminals 22 are respectively arranged in the first direction. The battery 100 includes two lead-out sheets 40, and the two lead-out sheets 40 are respectively provided at both ends of the battery cell 30 in the second direction.

[0093] It can be understood that one lead-out sheet 40 is arranged corresponding to the positive tabs and the positive terminals 21 and simultaneously connects the plurality of positive tabs and the plurality of positive terminals 21 to achieve the parallel connection of the plurality of positive tabs and the parallel connection of the plurality of positive terminals 21. The other lead-out sheet 40 is arranged close to the negative tabs and the negative terminals 22 and simultaneously connects the plurality of negative tabs and the plurality of negative terminals 22 to achieve the parallel connection of the plurality of negative tabs and the parallel connection of the plurality of negative terminals 22.

[0094] Thus, the parallel connection of the plurality of positive tabs and the plurality of negative tabs can be realized respectively, that is, the parallel connection of the battery cell 30 is realized.

[0095] Preferably, the number of positive tabs is the same as the number of negative tabs, and the number of positive terminals 21 is the same as the number of negative terminals 22.

[0096] In some embodiments, as Figure 10As shown, the tabs 31 of the battery cell 30 include a plurality of positive tabs and a plurality of negative tabs provided at the same end in the second direction, and the plurality of positive tabs and the plurality of negative tabs are arranged along the first direction respectively. The housing 10 is provided with a plurality of positive terminal posts 21 and a plurality of negative terminal posts 22 on the same end face in the second direction, and the plurality of positive terminal posts 21 and the plurality of negative terminal posts 22 are arranged along the first direction respectively. The battery 100 includes two lead-out sheets 40, one lead-out sheet 40 connecting the positive tabs and the positive terminal posts 21, and the other lead-out sheet 40 connecting the negative tabs and the negative terminal posts 22.

[0097] Thus, the positive tabs, the positive terminal posts 21, the negative tabs and the negative terminal posts 22 are all located on the same side of the battery 100 in the second direction, so that the size of the battery 100 in the second direction can be reduced.

[0098] Preferably, in Figure 10 the example of, the plurality of positive tabs are arranged along the first direction to form a column, the plurality of positive terminal posts 21 are arranged along the first direction to form a column, the plurality of negative tabs are arranged along the first direction to form a column, and the plurality of negative terminal posts 22 are arranged along the first direction to form a column. A column of positive terminal posts 21, a column of positive tabs, a column of negative tabs and a column of negative terminal posts 22 are arranged in sequence along the third direction, and the third direction is perpendicular to the first direction.

[0099] It should be noted that, in Figure 10 the example of, it shows the case where caps 50 are provided on the positive tabs and the negative tabs. In addition, an explosion-proof valve 16 is further provided on the housing 10. The explosion-proof valve 16 is arranged along the first direction and is provided between a column of positive tabs and a column of negative tabs, so that the explosion-proof valve 16 can separate the positive tabs and the negative tabs, reducing the short-circuit risk caused by the contact between the positive tabs and the negative tabs.

[0100] In addition, in Figure 10 the example of, a liquid injection hole 17 is further provided on the housing. The liquid injection hole 17 is located on the side of the terminal post 20 away from the cap 50.

[0101] Preferably, the number of positive tabs is the same as that of negative tabs, and the number of positive terminal posts 21 is the same as that of negative terminal posts 22.

[0102] The electrical device according to the embodiment of the present invention includes the battery 100 of the above embodiment.

[0103] The electrical device of the present application, by adopting the battery 100 of the above embodiment, the battery 100 is provided with a plurality of battery cells 30 and a plurality of terminal posts 20 which are all connected in parallel to the lead-out sheet 40, can increase the current intensity output by the battery cells 30 and improve the capacity of the battery 100, and at the same time can improve the current-carrying capacity of the terminal posts 20. Thus, while increasing the output current of the battery 100, the stability and reliability of the output current of the battery 100 are improved.

[0104] In this application, the type of the electrical device is not limited. For example, the electrical device is a new energy vehicle.

[0105] The other components and operations of the battery 100 and the electrical device according to the embodiments of the present utility model are known to those of ordinary skill in the art and will not be described in detail herein.

[0106] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. 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.

[0107] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A battery, characterized in that: include: A housing, wherein a receiving cavity is provided in the housing, a plurality of poles are provided on the housing, and the plurality of poles are arranged along a first direction; A plurality of battery cells, wherein the plurality of battery cells are arranged in the accommodation cavity and stacked along the first direction; A lead-out piece, the lead-out piece comprising a plurality of tab connection parts and a plurality of pole connection parts, the tab connection parts correspond to and are connected to the tabs of the battery cell one by one, and the pole connection parts correspond to and are connected to the poles one by one; Wherein, a plurality of the pole connection parts are connected in series, and a plurality of the pole lug connection parts are connected to a plurality of the pole connection parts; or, The plurality of tab connecting portions are connected in series, and the plurality of pole connecting portions are connected to the plurality of tab connecting portions.

2. The battery according to claim 1, characterized in that The lead-out piece is arranged at one end of the battery cell along the second direction, and the projection of the pole ear connecting portion along the second direction is at least partially offset from the projection of the pole connecting portion along the second direction.

3. The battery according to claim 2, characterized in that The thickness of the pole tab connection portion along the second direction is greater than the thickness of the pole connection portion along the second direction.

4. The battery according to claim 1, characterized in that The pole lug connection portion is in a plate shape, the pole post connection portion is in a plate shape, and an angle is formed between the pole lug connection portion and the pole post connection portion.

5. The battery according to claim 1, characterized in that The plurality of pole lug connecting portions are arranged at intervals along the first direction, and the plurality of pole connecting portions are arranged at intervals along the first direction.

6. The battery according to claim 1, characterized in that The lead-out piece further comprises a first interconnection bar and a second interconnection bar, wherein the first interconnection bar is connected to the pole lug connection portion and the pole connection portion at two ends thereof respectively; The second interconnection bar is connected to the two pole lug connection parts at two ends respectively, or the second interconnection bar is connected to the two pole connection parts at two ends respectively.

7. The battery according to claim 1, characterized in that The lead-out piece is arranged on a side of the shell close to the battery cell. The shell is provided with a plurality of avoidance through holes arranged along the first direction. The avoidance through holes correspond one-to-one to the tabs of the battery cell. The tabs of the battery cell and the tab connecting parts are passed through the avoidance through holes.

8. The battery according to claim 7, characterized in that The battery further comprises a cap, and the cap is disposed on the avoidance through hole.

9. The battery according to claim 8, characterized in that The shell is provided with a sinking platform on one side surrounding the avoidance through hole and away from the battery core, and the cap part is arranged in the sinking platform.

10. The battery according to claim 1, characterized in that The shell includes an end cover, the pole is arranged on the end cover, and the lead-out piece is connected to a side of the end cover close to the battery cell.

11. The battery according to claim 10, characterized in that The shell further includes: an insulating member, which is arranged on a side of the end cover close to the battery cell, the tab connection portion is passed through the insulating member, and the pole connection portion is arranged on a side of the insulating member away from the end cover.

12. The battery according to claim 1, characterized in that A plurality of explosion-proof valves are arranged on the housing, and the plurality of explosion-proof valves are arranged along the first direction.

13. The battery according to any one of claims 1 to 12, characterized in that The tabs of the battery cell include a plurality of positive tabs and a plurality of negative tabs respectively arranged at two ends of the second direction; The two end surfaces of the shell in the second direction are respectively provided with a plurality of positive poles and a plurality of negative poles, and the plurality of positive poles and the plurality of negative poles are respectively arranged along the first direction; The battery comprises two lead-out plates, which are respectively arranged at two ends of the battery core along the second direction.

14. The battery according to any one of claims 1 to 12, characterized in that The tabs of the battery cell include a plurality of positive tabs and a plurality of negative tabs arranged at the same end in the second direction, and the plurality of positive tabs and the plurality of negative tabs are arranged along the first direction respectively; The shell is provided with a plurality of positive poles and a plurality of negative poles on the same end surface in the second direction, and the plurality of positive poles and the plurality of negative poles are arranged along the first direction respectively; The battery comprises two lead-out sheets, one of which is connected to the positive electrode tab and the positive electrode column, and the other of which is connected to the negative electrode tab and the negative electrode column.

15. An electrical device, characterized in that: Comprising the battery according to any one of claims 1 to 14.

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