Energy source device, outdoor operation device, battery pack, and battery pack for outdoor operation device

Abstract

The present application discloses an energy source device, an outdoor operation device, a battery pack, and a battery pack for an outdoor operation device. The energy source device comprises a housing and a plurality of battery cells arranged in the housing, wherein the plurality of battery cells are configured as: a first battery cell group, comprising two rows of output battery cell groups having the same height on a plane, the output battery cell groups being configured to be connected to a positive electrode or a negative electrode of the energy source device so as to output electric energy to the outside; and a second battery cell group, comprising odd-numbered rows of battery cell groups and even-numbered rows of battery cell groups that are arranged in a staggered manner on a plane, wherein the height of the output battery cell groups is different from the height of the odd-numbered rows of battery cell groups and the height of the even-numbered rows of battery cell groups. According to the energy source device, the internal space of the energy source device can be fully utilized, so that the spatial layout of the energy source device is more rational.

Description

Energy device, outdoor work device, battery pack and battery pack for outdoor work device

[0001] This application claims priority to the following patent applications:

[0002] Chinese patent application No. 202410849838.1, filed on June 27, 2024, and entitled “Energy device and outdoor work device”;

[0003] Chinese patent application No. 202421497531.1, filed on June 27, 2024, and entitled “Outdoor work device”;

[0004] Chinese patent application No. 202421497532.6, filed on June 27, 2024, and entitled “Battery pack and outdoor work device”;

[0005] Chinese patent application No. 202421497533.0, filed on June 27, 2024, and entitled “Battery pack for outdoor work device and outdoor work device”;

[0006] Chinese patent application No. 202421497534.5, filed on June 27, 2024, and entitled “Battery pack for outdoor work device”;

[0007] Chinese patent application No. 202421497535.X, filed on June 27, 2024, and entitled “Battery pack for outdoor work device”;

[0008] The entire contents of the above patent applications are incorporated herein by reference. [TECHNICAL FIELD]

[0009] The present application relates to the technical field of energy devices, and in particular to an energy device, an outdoor work device, a battery pack and a battery pack for an outdoor work device. [BACKGROUND]

[0010] An energy device is generally formed by connecting a plurality of single cells in series and in parallel, and a battery management system (BMS) is added, which can be directly applied as an independent module in other devices.

[0011] However, the existing energy equipment has a traditional cell layout, generally all cells are arranged in a neat or staggered manner. Such arrangement cannot well adapt to the installation of other components or requires a large space to meet the installation, so that the overall space utilization of the energy equipment is insufficient.

[0012] Therefore, it is necessary to provide an improved energy equipment to overcome the defects of the prior art. [SUMMARY]

[0013] In view of the deficiencies of the prior art, the purpose of the present application is to provide an energy equipment, an outdoor work equipment, a battery pack and a battery pack for an outdoor work equipment, which at least optimizes the structural layout of the energy equipment.

[0014] In a first aspect, the technical solution adopted by the present application to solve the problems of the prior art is: an energy equipment, comprising a shell and a plurality of cells arranged in the shell, the plurality of cells being configured as: a first cell group comprising two rows of output cell groups having the same height on a plane, the output cell group being configured to be connected to the positive or negative electrode of the energy equipment to output electric energy externally; a second cell group comprising an odd-numbered row cell group and an even-numbered row cell group, the odd-numbered row cell group and the even-numbered row cell group being arranged in a staggered manner on the plane; wherein the height of the output cell group is different from the height of the odd-numbered row cell group and the height of the even-numbered row cell group.

[0015] Further improvement scheme is that the height of the output cell group is between the height of the odd-numbered row cell group and the height of the even-numbered row cell group.

[0016] Further improvement scheme is that the two rows of output cell groups are respectively arranged at both ends of the arrangement direction of the second cell group.

[0017] Further improvement scheme is that the cell axis of the odd-numbered row cell group and the cell axis of the even-numbered row cell group are not on the connecting line between the axes of the cells of the two rows of output cell groups having the same height.

[0018] Further improvement scheme is that at least one of the two rows of output cell groups is arranged between the second cell groups.

[0019] Further improvement scheme is that the lengths of the output cell group, the odd-numbered row cell group and the even-numbered row cell group are the same.

[0020] Further improvement scheme is that each cell group in the first cell group and the second cell group comprises an even number of cells, and the even number of cells are connected in pairs in parallel.

[0021] Further improvement scheme is that one row of the output battery cell groups is used for connecting positive electrode sheets, and the other row is used for connecting negative electrode sheets, and the positive electrode sheets and the negative electrode sheets have the same height.

[0022] Further improvement scheme is that a mounting bracket is further arranged in the shell, the plurality of battery cells are arranged in the mounting bracket, an acquisition piece for acquiring information of the plurality of battery cells is arranged on the mounting bracket, a first connecting part is arranged on the acquisition piece, a plurality of electrode connecting sheets are connected between the battery cells, a second connecting part is arranged on the electrode connecting sheet, and the first connecting part is used for connecting with the second connecting part.

[0023] Further improvement scheme is that the first connecting part is a hole on the acquisition piece, and the second connecting part is a connecting piece capable of being matched with the hole.

[0024] Further improvement scheme is that the two ends of the plurality of battery cells are connected with the electrode connecting sheets, and in the direction parallel to the axis of the battery cell, the ratio of the projection area of the acquisition piece to the sum of the projection areas of all the electrode connecting sheets at one end of the battery cell is greater than or equal to 1 / 3 and less than or equal to 1 / 2.

[0025] Further improvement scheme is that a recess structure is arranged at the region where the electrode connecting sheet is connected with the battery cell, and the end of the battery cell is a protruding structure, and when the electrode connecting sheet is assembled with the battery cell, the protruding structure of the battery cell is located in the recess structure.

[0026] Further improvement scheme is that a BMS plate is further arranged in the shell, and a conductive piece is connected between the BMS plate and the positive electrode sheet and the negative electrode sheet respectively, one side surface of the conductive piece is used for being arranged in close contact with the positive electrode sheet or the negative electrode sheet, and the other side surface is used for being arranged in close contact with the BMS plate.

[0027] Further improvement scheme is that a plurality of pins are arranged at the edge of the conductive piece, and a jack matched with the pins is arranged on the BMS plate.

[0028] Further improvement scheme is that the outer surface of the mounting bracket includes a first matching surface, a mounting seat is arranged on the mounting bracket, the mounting seat includes a second matching surface, a first matching part and a second matching part are respectively arranged on the positive electrode sheet and the negative electrode sheet, the first matching part is used for matching with the first matching surface, and the second matching part is used for matching with the second matching surface.

[0029] Further improvement solution: the first fitting part and the second fitting part of the positive electrode sheet are arranged to extend towards the same side of the positive electrode sheet, and the first fitting part and the second fitting part of the negative electrode sheet are arranged to extend towards the same side of the negative electrode sheet.

[0030] Further improvement solution: the mounting seat is further provided with a limiting part, which is used for limiting cooperation with the side surface of the positive electrode sheet or the negative electrode sheet.

[0031] Further improvement solution: further comprising a mounting bracket arranged in the shell, the mounting bracket is provided with a plurality of assembly parts suitable for assembling the battery cell, and the assembly part is provided with a limiting part for limiting the movement of the battery cell.

[0032] Further improvement solution: the limiting part is arranged to protrude from the inner wall of the assembly part to the assembly part cavity, and the surface of the limiting part cooperating with the battery cell is a guide surface.

[0033] Further improvement solution: the battery cell is a cylindrical battery cell, the assembly part is a circular assembly part, and the ratio of the length of the limiting part in the radial direction of the battery cell to the length of the diameter of the battery cell is greater than or equal to 0.02 and less than or equal to 0.05.

[0034] Further improvement solution: the middle part of the assembly part and any one end of the two ends thereof are provided with the limiting part.

[0035] Further improvement solution: the shell is further provided with a mounting bracket for mounting the battery cell, and the mounting bracket is provided with a damping structure.

[0036] Further improvement solution: the shell is provided with a heat dissipation slot, and the heat dissipation slot is arranged on two opposite surfaces of the shell.

[0037] The application also provides an energy equipment, comprising a shell and a plurality of battery cells arranged in the shell, wherein the plurality of battery cells are configured as: a first battery cell group, comprising at least two rows of output battery cells with the same height on a plane, the output battery cell group is configured to be connected with the positive electrode or the negative electrode of the energy equipment to output electric energy externally; a second battery cell group, comprising an odd-numbered row of battery cell group and an even-numbered row of battery cell group, the odd-numbered row of battery cell group and the even-numbered row of battery cell group are arranged alternately on the plane; wherein the height of the output battery cell group is different from the height of the odd-numbered row of battery cell group and the height of the even-numbered row of battery cell group; a mounting bracket arranged in the shell, the mounting bracket is provided with a plurality of assembly parts suitable for assembling the battery cell, and the assembly part is provided with a limiting part for limiting the movement of the battery cell.

[0038] Further improvement is that the height of the output cell group is between the height of the odd row cell group and the height of the even row cell group.

[0039] Further improvement is that the cell axis of the odd row cell group and the cell axis of the even row cell group are not on the line between the cell axes of the two rows of output cell groups with the same height.

[0040] The application also provides an outdoor work equipment, comprising: an energy equipment, the energy equipment comprising: a shell and a plurality of cells arranged in the shell; the plurality of cells are configured as: a first cell group comprising two rows of output cell groups with the same height on a plane, the output cell groups being configured to be connected with the positive electrode or the negative electrode of the energy equipment to output electric energy externally; a second cell group comprising an odd row cell group and an even row cell group, the odd row cell group and the even row cell group being arranged alternately on the plane; wherein the height of the output cell group is different from the height of the odd row cell group and the height of the even row cell group.

[0041] Further improvement is that the height of the output cell group is between the height of the odd row cell group and the height of the even row cell group.

[0042] Further improvement is that the cell axis of the odd row cell group and the cell axis of the even row cell group are not on the line between the cell axes of the two rows of output cell groups with the same height.

[0043] Further improvement is that at least one row of the two rows of output cell groups is arranged between the second cell groups.

[0044] Compared with the prior art, the application has the following beneficial effects:

[0045] The energy equipment of the application arranges the two rows of cell groups used as positive and negative output at the same height to match the positive electrode sheet and the negative electrode sheet with the same length and provide power externally, which is beneficial to reduce the production cost of the positive electrode sheet and the negative electrode sheet and simplify the assembly process of the positive electrode sheet, the negative electrode sheet and the cell group.

[0046] With the development of new energy technology, outdoor work equipment is more and more powered by energy equipment. The energy equipment is generally formed by series and parallel connection of a plurality of single cells, and a battery management system (BMS, Battery Management Systems) and the like are added, which can be directly applied as an independent module in other equipment.

[0047] However, the existing energy device, the electric core is installed in the shell through the support, then due to the electric core is not fixed, will cause the electric core relative to the support relative movement, will cause the damage of the electric core. And although some will install the fixing piece on the support to fix the electric core, but these fixing pieces occupy larger space, is not conducive to the overall layout design of the energy device, will waste more space inside the energy device, makes the electric capacity of the energy device greatly reduces.

[0048] Based on this, the second aspect, the technical scheme adopted by the present application to solve the prior art problem is: an outdoor operation device, comprising: a power output component configured to output power to perform outdoor operations; a walking component configured to support the outdoor operation device to walk; and an energy device configured to provide power to the outdoor operation device; the energy device comprises a shell, the shell is provided with: a plurality of electric cores configured to be installed in the shell; a mounting support provided in the shell, the mounting support is provided with a plurality of assembly parts for mounting the electric cores, each assembly part is provided with a limiting piece for limiting the movement of the electric core.

[0049] Further improvement scheme is: the limiting piece is provided in the assembly part by the inner wall of the assembly part.

[0050] Further improvement scheme is: the electric core is a cylindrical electric core, the assembly part is a circular assembly part, the length of the limiting piece in the direction parallel to the axis of the electric core is greater than or equal to 0.02 and less than or equal to 0.05 times the length of the electric core in the axial direction.

[0051] Further improvement scheme is: the end of the assembly part is provided with a limiting part, and in the direction along the axis of the electric core, the projection area of the limiting part is greater than or equal to 0.002 and less than or equal to 0.003 times the projection area of a single end surface of the electric core.

[0052] Further improvement scheme is: in the direction along the axis of the electric core, the projection area of the limiting part is greater than or equal to 0.0025 and less than or equal to 0.0028 times the projection area of a single end surface of the electric core.

[0053] Further improvement scheme is: the area of the side wall of the electric core located in the assembly part is greater than or equal to 1 / 3 and less than or equal to 1 / 2 times the area of the entire side wall of the electric core.

[0054] Further improvement scheme is: the middle part of the assembly part and any one end of the two ends thereof are provided with the limiting piece.

[0055] Further improvement scheme is: the shortest distance between the electric cores assembled in the assembly part is greater than or equal to 2mm.

[0056] Further improvement scheme is that the mounting bracket comprises a first bracket and a second bracket, and the first bracket and the second bracket are provided with assembling portions.

[0057] Further improvement scheme is that the electrode connecting pieces are connected between the battery cells, and the first bracket and the second bracket are provided with through holes for the electrode connecting pieces to pass through and communicate with the assembling portions.

[0058] Compared with the prior art, the present application has the following beneficial effects:

[0059] The outdoor work equipment of the present application has the following beneficial effects:

[0060] The battery pack is generally formed by series and parallel connection of multiple single battery cells, and a battery management system (BMS, Battery Management Systems) and the like are added, which can be directly applied as an independent module in other devices.

[0061] However, the existing battery pack has a relatively traditional battery cell layout, which generally arranges all battery cells in a neat or staggered manner. Such arrangement cannot well adapt to the installation of other components, resulting in insufficient utilization of the overall space inside the battery pack.

[0062] Therefore, in a third aspect, the present application employs the technical solution of a battery pack, which comprises a shell and multiple battery cells arranged in the shell, and the multiple battery cells are configured as multiple rows of battery cell groups, and the heights of at least two rows of the battery cell groups in a plane are the same, wherein the battery cell groups with the same height are configured as output battery cell groups connected to the positive or negative electrode of the battery pack to output electric energy.

[0063] Further improvement scheme is that the multiple rows of battery cell groups further comprise an odd row of battery cell group and an even row of battery cell group, and the odd row of battery cell group and the even row of battery cell group are arranged in a staggered manner in the plane.

[0064] Further improvement scheme is that the height of the output battery cell group is between the height of the odd row of battery cell group and the height of the even row of battery cell group.

[0065] Further improvement scheme is that the two rows of output battery cell groups are arranged at two ends in the arrangement direction of the odd row of battery cell group and the even row of battery cell group.

[0066] Further improvement scheme is that at least one row of the two rows of the output battery cell groups is arranged between the odd row battery cell group and the even row battery cell group.

[0067] Further improvement scheme is that the output battery cell group, the odd row battery cell group and the even row battery cell group have the same length.

[0068] Further improvement scheme is that one row of the two rows of the output battery cell groups is used for connecting the positive electrode sheet and the other row is used for connecting the negative electrode sheet, and the positive electrode sheet and the negative electrode sheet have the same height.

[0069] Further improvement scheme is that the mounting bracket arranged in the shell is further included, the plurality of battery cells are arranged in the mounting bracket, the mounting bracket is provided with the acquisition part for acquiring information of the plurality of battery cells, the acquisition part is provided with the first connecting part, the plurality of electrode connecting sheets are connected between the battery cells, the electrode connecting sheets are provided with the second connecting part, and the first connecting part is used for being connected with the second connecting part.

[0070] Further improvement scheme is that the BMS board connected with the acquisition part is further arranged in the shell, the BMS board is respectively connected with the conductive part between the positive electrode sheet and the negative electrode sheet, and the two sides of the conductive part are respectively attached to the positive electrode sheet and the negative electrode sheet.

[0071] The application further provides an outdoor working device, comprising:

[0072] A power output assembly is arranged to output power to perform outdoor work.

[0073] A walking assembly is arranged to support the outdoor working device to walk.

[0074] The battery pack as described above is configured to provide electric energy for the outdoor working device.

[0075] The application further provides an outdoor working device, comprising: a power output assembly arranged to output power to perform outdoor work; a walking assembly arranged to support the outdoor working device to walk; and a battery pack as described above, which is configured to provide electric energy for the outdoor working device.

[0076] Compared with the prior art, the application has the following beneficial effects:

[0077] The battery pack of the application matches the positive electrode sheet and the negative electrode sheet with the same length by arranging the two rows of battery cell groups used as positive and negative output at the same height, which is conducive to reducing the production cost of the positive electrode sheet and the negative electrode sheet and simplifying the assembly process of the positive electrode sheet, the negative electrode sheet and the battery cell group.

[0078] The battery pack is generally formed by connecting a plurality of single cells in series and parallel, and a battery management system (BMS) is added, which can be directly applied to other devices as an independent module.

[0079] However, in order to balance the charging or discharging of each cell in real time, the existing battery pack for outdoor operation equipment connects a plurality of electrode pieces at the end of the cell through a plurality of wire harnesses, and then bundles a plurality of wires to the BMS board. This not only causes assembly to be troublesome and inefficient, but also causes the wire harnesses in the battery pack for outdoor operation equipment to be messy, which is not conducive to heat dissipation of the cells and occupies space in the battery pack for outdoor operation equipment.

[0080] Therefore, in a fourth aspect, the present application adopts the technical solution to solve the technical problems of the prior art: a battery pack for outdoor operation equipment, comprising: a shell; a mounting bracket arranged in the shell, the mounting bracket being provided with a plurality of cells; a plurality of electrode connecting pieces configured to connect the positive or negative electrodes of the cells; and at least two acquisition pieces arranged on the mounting bracket, the acquisition pieces being configured to be connected to the electrode connecting pieces and used to acquire the electrical energy information of the cells, wherein the acquisition pieces are provided with first connecting portions, the electrode connecting pieces are connected between the cells and provided with second connecting portions, and the first connecting portions are used to be connected to the second connecting portions.

[0081] Further improvement schemes are that the first connecting portion is a hole on the acquisition piece, and the second connecting portion is a connecting piece that can be matched with the hole.

[0082] Further improvement schemes are that the extension direction of the acquisition piece is perpendicular to the axis direction of the cells.

[0083] Further improvement schemes are that the mounting bracket is arranged in the shell, the plurality of cells are arranged in the mounting bracket, and the acquisition pieces are arranged on the mounting bracket and used to acquire the information of the plurality of cells.

[0084] Further improvement schemes are that the two ends of the plurality of cells are connected to the electrode connecting pieces, and along the axis direction parallel to the cells, the ratio of the projection area of the acquisition piece to the sum of the projection areas of all the electrode connecting pieces at one end of the cells is greater than or equal to 1 / 3 and less than or equal to 1 / 2.

[0085] Further improvement scheme is that the shell is further provided with a BMS plate connected with the collecting piece, and a positive electrode sheet and a negative electrode sheet for connecting with the battery cell.

[0086] Further improvement scheme is that the edge of the conductive piece is provided with a plurality of pins, and the BMS plate is provided with a plurality of insertion holes matched with the pins.

[0087] Further improvement scheme is that the extension direction of the BMS plate is parallel to the axis direction of the battery cell.

[0088] Further improvement scheme is that the thickness of the electrode connecting sheet is greater than 0.5mm and less than or equal to 1.8mm.

[0089] The application also provides an outdoor work equipment, comprising: a power output assembly arranged to output power to perform outdoor work; a walking assembly arranged to support the outdoor work equipment to walk; and,

[0090] The battery pack for outdoor work equipment as described above is configured to provide electric energy for the outdoor work equipment.

[0091] The application also provides an outdoor work equipment, comprising: a power output assembly arranged to output power to perform outdoor work; a walking assembly arranged to support the outdoor work equipment to walk; and, a battery pack for outdoor work equipment as described above, which is configured to provide electric energy for the outdoor work equipment.

[0092] Compared with the prior art, the application has the following beneficial effects:

[0093] The battery pack for outdoor work equipment of the application connects the collecting piece between the battery cell and the BMS plate, connects the end of all battery cells through the collecting piece to collect the electric energy information of the battery cell, so as to replace the wiring harness with the collecting piece, make the layout in the battery pack for outdoor work equipment more reasonable, and make the assembly more efficient.

[0094] The battery pack is generally formed by connecting a plurality of single battery cells in series and parallel, and a battery management system (BMS, Battery Management Systems) and the like are added, which can be directly applied as an independent module in other equipment.

[0095] However, the existing battery pack for outdoor work equipment has small energy, and cannot be well adapted to the use of outdoor work equipment with large area.

[0096] Based on this, the fifth aspect, the present application solves the technical scheme adopted by the prior art problem is: a battery pack for outdoor operation equipment, the outdoor operation equipment includes: power output assembly, set as output power, to perform outdoor operation; walking assembly, set as support the outdoor operation equipment walking; the battery pack includes: shell; a plurality of electric cores, set in the shell, the sum of the energy of a plurality of electric cores is not less than 2000Wh; the energy density of the battery pack is greater than or equal to 0.28Wh / cm 3 .

[0097] Further improved scheme is: the energy density of the battery pack is greater than or equal to 0.3Wh / cm 3 .

[0098] Further improved scheme is: the shell is further provided with mounting rail, the ratio of the length of the mounting rail and the height of the battery pack is less than 0.5.

[0099] Further improved scheme is: the diameter of the electric core is greater than or equal to 4cm, the length of the electric core is greater than or equal to 135mm.

[0100] Further improved scheme is: the length of the shell is less than or equal to 37.2cm, the width of the shell is less than or equal to 17cm, the height of the shell is less than or equal to 23.9cm.

[0101] Further improved scheme is: the ratio of the length of the electric core and the width of the shell is greater than or equal to 0.8.

[0102] Further improved scheme is: the number of electric cores is not less than 32.

[0103] Further improved scheme is: the shell is further provided with mounting bracket for mounting the electric core, the mounting bracket includes first bracket and second bracket, the first bracket and the second bracket are both provided with assembly part for assembling the electric core, the assembly part is provided with limiting piece for fixing the electric core.

[0104] Further improved scheme is: the weight of the battery pack is greater than or equal to 15kg.

[0105] Further improved scheme is: the capacity of the battery pack is greater than or equal to 30Ah, the ratio of the capacity and weight of the battery pack is greater than or equal to 2Ah / kg.

[0106] Further improved scheme is: the electric core is lithium iron phosphate or ternary lithium.

[0107] Compared with the prior art, the present application has the following beneficial effects:

[0108] The battery pack for outdoor work equipment disclosed in this application increases the energy density of the battery, enabling it to provide more energy per unit volume. This allows for the installation of higher-energy battery packs within the limited space of outdoor work equipment, thereby improving the endurance of the equipment.

[0109] A battery pack is generally formed by connecting multiple individual battery cells in series and parallel, and also includes a battery management system (BMS). It can be directly used as an independent module in other devices.

[0110] However, existing battery packs for outdoor work equipment are generally large in size. When they are installed on outdoor work equipment, they take up a lot of space. Since the space available for installing battery packs on outdoor work equipment is limited, the number of battery packs that can be installed in the limited space is limited.

[0111] Based on this, in the sixth aspect, the technical solution adopted by this application to solve the prior art problem is: a battery pack for outdoor work equipment, the outdoor work equipment including: a power output component configured to output power to perform outdoor work; a walking component configured to support the walking of the outdoor work equipment; the battery pack including: a housing detachably installed on the outdoor work equipment; a plurality of battery cells disposed in the housing, the diameter of the battery being greater than or equal to 40 mm, and the length of the battery cell being greater than or equal to 135 mm; wherein, the ratio of the length of the battery cell to the width of the housing is greater than or equal to 0.7.

[0112] A further improvement is that the housing is further provided with a mounting bracket for mounting the battery cell, and the ratio of the width of the mounting bracket to the width of the housing is not less than 0.9.

[0113] A further improvement is as follows: electrode connecting pieces are provided at both ends of the battery cell, and acquisition devices for collecting signals from the electrode connecting pieces are provided on both sides of the mounting bracket, and a BMS board that is electrically connected to the acquisition devices is provided on the upper part of the mounting bracket.

[0114] A further improvement is that the AC internal resistance of the battery cell during charging is less than or equal to 5mΩ, and the DC internal resistance of the battery cell during discharging is less than or equal to 8mΩ.

[0115] A further improvement is that the charging limit voltage of the battery cell is less than or equal to 5V.

[0116] A further improvement is that the charging cutoff current of the battery cell is less than or equal to 1200mAh.

[0117] A further improvement is that the standard discharge current of the battery cell is greater than or equal to 10000mAh.

[0118] Further improvement is that the length of the shell is less than or equal to 372 mm, the width of the shell is less than or equal to 17 mm, and the height of the shell is less than or equal to 239 mcm.

[0119] Further improvement is that the outdoor work equipment battery pack comprises at least two electric connection terminals, and the two electric connection terminals are symmetrically arranged.

[0120] Further improvement is that the distance between the electric connection terminal and the bottom surface of the battery pack is less than 30 mm.

[0121] Further improvement is that the ratio of the cross-sectional area of the single electric core along its radial direction to the projection area of the battery pack along its width direction is greater than or equal to 0.01.

[0122] Further improvement is that the upper part and the lower part of the shell of the battery pack are provided with heat dissipation grooves, and the plurality of electric cores form an electric core module, and the length of the electric core module along its width direction is less than the length along its length direction.

[0123] Compared with the prior art, the present application has the following beneficial effects:

[0124] The outdoor work equipment battery pack of the present application sets the ratio of the length of the electric core to the width of the shell to be greater than or equal to 0.7, so that the space utilization of the shell is relatively sufficient, and the electric core layout is relatively compact, which helps to place multiple battery packs on the outdoor work equipment without occupying a large space of the outdoor work equipment. [BRIEF DESCRIPTION OF DRAWINGS]

[0125] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings:

[0126] Fig. 1 is a perspective view of an energy equipment according to an embodiment of the present application;

[0127] Fig. 2 is a structural schematic view of an electric core layout of an energy equipment according to an embodiment of the present application;

[0128] Fig. 3 is a schematic view of the internal structure of an energy equipment according to an embodiment of the present application;

[0129] Fig. 4 is a structural schematic view of an electrode connecting sheet of an energy equipment according to an embodiment of the present application;

[0130] Fig. 5 is a structural schematic view of an electrode connecting sheet of an energy equipment according to an embodiment of the present application from another angle;

[0131] Fig. 6 is a schematic view of the internal structure of an energy equipment according to an embodiment of the present application from another angle;

[0132] Figure 7 is a structural schematic diagram of an electrode connecting piece of an energy device according to an embodiment of the present application;

[0133] Figure 8 is a structural schematic diagram of a cell structure of an energy device according to an embodiment of the present application;

[0134] Figure 9 is a structural schematic diagram of the positional relationship of a BMS board, positive and negative electrode pieces and conductive pieces of an energy device according to an embodiment of the present application;

[0135] Figure 10 is a structural schematic diagram of a conductive piece of an energy device according to an embodiment of the present application;

[0136] Figure 11 is a structural schematic diagram of a positive electrode piece of an energy device according to an embodiment of the present application;

[0137] Figure 12 is a structural schematic diagram of a second support of an energy device according to an embodiment of the present application;

[0138] Figure 13 is a structural schematic diagram of a second support of an energy device according to an embodiment of the present application from another angle;

[0139] Figure 14 is a structural schematic diagram of a second support of an energy device according to an embodiment of the present application from another angle;

[0140] Figure 15 is a structural schematic diagram of a second support of an energy device according to an embodiment of the present application from another angle;

[0141] Figure 16 is a structural schematic diagram of an energy device with a damping structure according to an embodiment of the present application;

[0142] Figure 17 is a structural schematic diagram of an outdoor work device according to an embodiment of the present application;

[0143] Figure 18 is a structural schematic diagram of an outdoor work device according to another embodiment of the present application;

[0144] Figure 19 is a structural schematic diagram of an outdoor work device according to another embodiment of the present application;

[0145] Figure 20 is a structural schematic diagram of an outdoor work device according to another embodiment of the present application.

[0146] Meaning of reference signs in the figure: 100, energy device; 101, output cell group; 102, odd row cell group; 103, even row cell group; 104, mounting support; 1041, first support; 1042, second support; 105, first matching surface; 106, second matching surface; 107, assembly part; 108, limiting piece; 109, electrode connecting piece; 1091, recessed structure; 1092, protruding structure; 1093, second connecting part; 110, through hole; 111, BMS board; 112, positive electrode piece; 1121, first matching part; 1122, second matching part; 1123, inclined surface; 113, cell; 1131, end surface; 1132, side wall; 1133, protruding structure; 114, negative electrode piece; 115, mounting seat; 116, conductive piece; 1161, pin; 1162, fixing hole; 117, collection piece; 1171, first connecting part; 118, support part; 119, damping structure; 120, plane; 121, handle; 122, heat dissipation slot; 123, limiting part; 200, main frame; 300, operation assembly; 400, seat; 500, walking assembly; 600, power output assembly. [DETAILED DESCRIPTION]

[0147] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0148] The energy device (battery pack) is generally formed by series and parallel connection of a plurality of single cells, and a battery management system (BMS, Battery Management Systems) and the like are added, which can be directly applied as an independent module in other devices.

[0149] However, the existing energy device has a relatively traditional cell layout, which is generally all cells arranged in order or all cells staggered, which sometimes cannot well adapt to the installation of other components in the energy device, so that the overall space utilization in the energy device is insufficient.

[0150] Moreover, the existing energy device improves the heat dissipation efficiency of the battery cell by setting the battery cells in staggered manner, i.e., the battery cell groups in adjacent different rows are set in different heights, and the battery cell groups at the farthest ends of the two opposite rows are usually selected as the positive and negative output terminals. Due to the different heights of the battery cell groups at the two ends, the positive and negative electrode plates are usually set to different lengths to adapt to the battery cell groups of different heights, so that the output terminals of the positive and negative electrode plates remain consistent in height, thereby realizing the connection of the positive and negative electrode plates with the BMS board at the same height. However, if electrode plates of different lengths are used for connection, not only the complexity of production of the positive and negative electrode plates is increased, but also the assembly cost of the energy device is indirectly increased.

[0151] Moreover, the battery cell group at the higher end occupies the space of the energy device, and in order to adapt to the installation of other components, the height of the energy device is increased as a whole, so that the energy device as a whole occupies a larger space, affecting the adaptability of the energy device with other devices (such as outdoor working devices or power tools).

[0152] Please refer to Figs. 1-20, which show an energy device 100 according to an embodiment of the present application, comprising a housing and a plurality of battery cells 113 arranged in the housing, the plurality of battery cells 113 are configured as: a first battery cell group comprising two rows of output battery cell groups 101 having the same height on a plane 120, the output battery cell groups 101 are configured to be connected with the positive or negative terminal of the energy device 100 to output electric energy externally; a second battery cell group comprising an odd row battery cell group 102 and an even row battery cell group 103, the odd row battery cell group 102 and the even row battery cell group 103 are arranged in staggered manner on the plane 120; wherein the height of the output battery cell group 101 is different from the height of the odd row battery cell group 102 and the height of the even row battery cell group 103.

[0153] Such a way of setting the height of the output battery cell group 101 as the electric energy output to be different from the height of the odd row battery cell group 102 and the height of the even row battery cell group 103 can realize full use of the internal space of the energy device 100, so that the spatial layout of the energy device 100 is more reasonable.

[0154] As shown in FIG. 1 and FIG. 6, the housing of the energy equipment 100 of the present application is further provided with a mounting bracket 104, and the mounting bracket 104 is provided with a plurality of assembly portions 107 for assembling the battery cells 113. The position layout of each assembly portion 107 is set according to the layout of the battery cells 113. The mounting bracket 104 comprises a first bracket 1041 and a second bracket 1042 combined together, and the first bracket 1041 and the second bracket 1042 are both provided with assembly portions 107, and the assembly portions 107 on the first bracket 1041 and the second bracket 1042 are correspondingly arranged. The two ends of the battery cells 113 are inserted into the assembly portions 107 on the first bracket 1041 and the second bracket 1042 respectively to be mounted on the mounting bracket 104. The first bracket 1041 and the second bracket 1042 are combined to form a square structure.

[0155] As shown in FIG. 2, in a specific embodiment, the height h2 of the output battery cell group 101 is located between the height h1 of the odd-numbered row battery cell group 102 and the height h3 of the even-numbered row battery cell group 103. By setting the height h2 of the output battery cell group 101 between the height h1 of the odd-numbered row battery cell group 102 and the height h3 of the even-numbered row battery cell group 103, the output battery cell group 101 does not occupy additional space in the height direction, and is only arranged between the height h1 of the odd-numbered row battery cell group 102 and the height h3 of the even-numbered row battery cell group 103, thereby saving the space occupied by the energy equipment 100 due to the layout.

[0156] Further, the two rows of output battery cell groups 101 are arranged at both ends in the arrangement direction of the second battery cell groups. In the layout case that the height h2 of the two rows of output battery cell groups 101 is located between the height h1 of the odd-numbered row battery cell group 102 and the height h3 of the even-numbered row battery cell group 103, the two rows of output battery cell groups 101 are located at both ends of the entire battery cell group layout, so that the battery cell groups are enclosed into a square structure, and sufficient reserved space is formed at the four corners of the square structure, and the reserved space area can be used to reinforce the structure of the mounting bracket 104 at the four corners, so as to increase the strength of the mounting bracket 104, and further increase the drop resistance and impact resistance of the energy equipment 100.

[0157] Further, at least one of the two rows of output battery cell groups 101 is arranged between the second battery cell groups, which is beneficial to the layout of the output battery cell groups 101 being closer.

[0158] In a specific embodiment, the lengths of the output battery cell group 101, the odd-numbered row battery cell group 102 and the even-numbered row battery cell group 103 are the same. This makes the arrangement of the battery cells 113 more regular, and is beneficial to the more compact layout of the internal space of the housing.

[0159] Please refer to FIG. 2, in a specific embodiment, each of the first and second cell groups includes an even number of cells 113, and the even number of cells 113 are connected in parallel two by two. Preferably, the energy device 100 in the present application includes 32 cells 113, which are arranged into 8 rows of cell groups, each row of cell groups includes four cells 113, of which two rows are output cell groups 101, and the remaining 3 rows are odd rows of cell groups 102 and 3 rows of even rows of cell groups 103, and the adjacent two cells 113 in each row are connected in parallel to supply power externally. The 32 cells 113 can be arranged into 16 groups of two cells 113 connected in parallel, and then the 16 groups of cells 113 are connected in series to output power externally.

[0160] In the present application, the cell 113 is preferably a cylindrical cell 113, which generally has a diameter greater than 38 mm, preferably a diameter of 40 mm, and a length of the cell 113 generally greater than or equal to 130 mm, preferably a length of 130 mm. The nominal voltage of a single cell 113 is greater than or equal to 3.2V, preferably a nominal voltage of 3.2V. The nominal capacity of the cell 113 is greater than or equal to 15Ah, preferably a nominal capacity of 20Ah.

[0161] The weight of the energy device 100 assembled from the above-mentioned cells is greater than or equal to 11.4Kg, preferably a weight of 16Kg, the nominal energy of the energy device 100 is greater than or equal to 1.54Kwh, preferably a nominal energy of 1.6Kwh, and the nominal voltage of the energy device 100 is greater than or equal to 51.2v, preferably a nominal voltage of 58v.

[0162] Of course, the number of cells 113 can also be set to 36 or 40, or other numbers of more.

[0163] In the present application, the length of the shell is less than or equal to 372mm, preferably the length of the shell is 370mm. The width of the shell is less than or equal to 170mm, preferably the width of the shell is 160mm, and the height of the shell is less than or equal to 239mm, preferably the height of the shell is 230mm. And the cell 113 is preferably a cylindrical cell 113, which generally has a diameter greater than 38 mm, preferably a diameter of 40 mm, and a length of the cell 113 generally greater than or equal to 130 mm, preferably a length of 130 mm, or 135 mm.

[0164] In a specific embodiment, the sum of the energy of all cells 113 in the battery pack is not less than 2000Wh, and the energy density of the battery pack is greater than or equal to 0.28Wh / cm3, further, the energy density of the battery pack is greater than or equal to 0.3Wh / cm3, preferably the energy density of the battery pack is 0.5Wh / cm3 or 0.6Wh / cm3. So that the battery pack can provide higher energy in a unit volume.

[0165] In one embodiment, the ratio of the length of the battery cell 113 to the width of the housing is greater than or equal to 0.7, and preferably, the ratio of the length of the battery cell 113 to the width of the housing is 0.8 or 0.9. During assembly, the axis direction of the battery cell 113 is parallel to the width direction of the housing. The ratio is set so that the battery cell 113 can fully utilize the size in the width direction of the housing. In the case of using the same battery cell 113, the size of the battery pack is smaller, which is helpful for the use of multiple battery packs on outdoor work equipment.

[0166] Further, the ratio of the width of the mounting bracket 104 to the width of the housing is not less than 0.9, and preferably, the ratio of the width of the mounting bracket 104 to the width of the housing is 0.9. The assembly of the mounting bracket 104 and the housing is also relatively compact, saving space in the housing.

[0167] The battery cell 113 of the present application has an AC resistance during charging that is less than or equal to 5 mΩ, and preferably, the AC resistance during charging of the battery cell 113 is 3 mΩ or 4 mΩ. When the battery cell 113 is discharged, the DC resistance during discharge of the battery cell 113 is less than or equal to 8 mΩ, and preferably, the DC resistance during discharge of the battery cell 113 is 6 mΩ. The charge limit voltage of the battery cell 113 is less than or equal to 5 V, and preferably, the charge limit voltage of the battery cell 113 is 3.8 V or 4 V.

[0168] Further, the charge cutoff current of the battery cell 113 is less than or equal to 1200 mAh, and preferably, the charge cutoff current of the battery cell 113 is 800 mAh or 1000 mAh. The standard discharge current of the battery cell 113 is greater than or equal to 10000 mAh, and preferably, the standard discharge current of the battery cell 113 is 15000 mAh or 20000 mAh.

[0169] The nominal voltage of a single battery cell 113 is greater than or equal to 3.2 V, and preferably, the nominal voltage is 3.2 V. The nominal capacity of the battery cell 113 is greater than or equal to 15 Ah, and preferably, the nominal capacity is 20 Ah, 30 Ah, or 40 Ah.

[0170] The weight of the battery pack for outdoor work equipment assembled from the above-mentioned battery cells is greater than or equal to 11.4 Kg, and preferably, the weight is 16 Kg. The nominal energy of the battery pack for outdoor work equipment is greater than or equal to 1.54 Kwh, and preferably, the nominal energy is 1.6 Kwh. The nominal voltage of the battery pack for outdoor work equipment is greater than or equal to 51.2 V, and preferably, the nominal voltage is 58 V.

[0171] Further, the ratio of the capacity to the weight of the battery pack is greater than or equal to 2 Ah / kg.

[0172] In an embodiment, the battery pack is provided with two electrical connection terminals, which are symmetrically arranged on the shell of the battery pack, so that the battery pack can output electric energy through the two electrical connection terminals. Compared with the mode of outputting electric energy through only one electrical connection terminal, the two electrical connection terminals of the battery pack can reduce the heat generated when electric energy is delivered.

[0173] Further, the distance between the electrical connection terminal and the bottom surface of the battery pack is less than 30 mm, or the distance between the electrical connection terminal and the bottom surface of the battery pack is less than 20 mm.

[0174] In an embodiment, the ratio of the cross-sectional area of the single cell 113 along its radial direction to the projection area of the battery pack along its width direction is greater than or equal to 0.01. Compared with the battery pack used by the conventional outdoor working equipment, especially the battery pack used by the riding mower, the ratio of the cross-sectional area of the cell 113 along its radial direction to the projection area along its width direction in the application is larger, so that the space in the shell is fully used to assemble the cell 113, so that the battery pack in the application has smaller volume and occupies smaller space in the case of assembling the same cell 113.

[0175] In an embodiment, the upper part and the lower part of the shell of the battery pack are provided with heat dissipation slots 122, and the plurality of cells form a cell module, and the length of the cell module along its width direction is less than the length along its length direction. Such arrangement is conducive to the sufficient heat dissipation of the cell 113 through the heat dissipation slots 122.

[0176] As shown in FIG. 9, in an embodiment, one row of the two rows of output cell groups 101 is used to connect the positive electrode sheet 112, and the other row is used to connect the negative electrode sheet 114, and the height of the positive electrode sheet 112 and the negative electrode sheet 114 is the same. Since the positive electrode sheet 112 and the negative electrode sheet 114 also need to be connected with other components, so that the other components connected with the positive electrode sheet 112 and the negative electrode sheet 114 can be arranged horizontally relative to the positive electrode sheet 112 and the negative electrode sheet 114, so that the space layout of the energy equipment 100 in the height direction is more compact.

[0177] In an embodiment, the distance between the positive electrode sheet 112 and the negative electrode sheet 114 is greater than or equal to 200 mm. Such arrangement can effectively prevent the short circuit caused by the overlapping of the positive electrode sheet 112 and the negative electrode sheet 114 during assembly or use. Preferably, the distance between the positive electrode sheet 112 and the negative electrode sheet 114 is 200 mm or 225 mm.

[0178] As shown in FIGS. 6 and 7, in an embodiment, the mounting bracket 104 is provided with a collection piece 117 for collecting information of the plurality of battery cells 113, the collection piece 117 is provided with a first connecting part 1171, the plurality of electrode connecting pieces 109 are connected between the battery cells 113, the electrode connecting pieces 109 are provided with a second connecting part 1093, and the first connecting part 1171 is used to connect with the second connecting part 1093. Further, the first connecting part 1171 is a hole on the collection piece 117, the second connecting part 1093 is a connecting piece that can be matched with the hole, the connecting piece is a protrusion that is inserted and matched with the hole, and the protrusion is in an integral molding structure with the electrode connecting piece 109. In the specific assembly process, after the connecting piece is connected with the hole, the two are fixedly connected through welding.

[0179] As shown in FIGS. 3 and 6, further, the two ends of the plurality of battery cells 113 are connected with the electrode connecting pieces 109, and along the axis direction parallel to the battery cells 113, the ratio of the projection area of the collection piece 117 to the sum of the projection areas of all the electrode connecting pieces 109 at one end of the battery cells 113 is greater than or equal to 1 / 3 and less than or equal to 1 / 2. Such a setting makes the area of the electrode connecting pieces 109 covered by the collection piece 117 smaller, which is beneficial for the battery cells 113 to dissipate heat, thereby helping the battery to play an ideal charging and discharging state. Preferably, the ratio of the projection area of the collection piece 117 to the sum of the projection areas of all the electrode connecting pieces 109 at one end of the battery cells 113 is 1 / 3, 2 / 5 or 1 / 2.

[0180] As shown in FIGS. 4, 5 and 7, the thickness of the electrode connecting piece 109 is greater than 0.5 mm and less than or equal to 1.8 mm, which is beneficial for improving the firmness of the connection between the electrode connecting piece 109 and the positive electrode or the negative electrode of the battery cell 113, so as to prevent the electrode connecting piece 109 from being welded through. Preferably, the thickness of the electrode connecting piece 109 is 0.6 mm, 1 mm, 1.5 mm or 1.8 mm.

[0181] In an embodiment, the sum of the number of the positive electrode pieces 112, the negative electrode pieces 114 and the electrode connecting pieces 109 of the application is 17, the collection piece 117 has two in total and is distributed at the two ends of the battery cell 113, therefore, there are at least 17 collection points on the two collection pieces 117, and each collection point collects different positive electrode pieces 112, negative electrode pieces 114 and electrode connecting pieces 109.

[0182] As shown in FIG. 4, FIG. 5 and FIG. 8, further, the area where the electrode connecting piece 109 connects with the battery cell 113 is provided with a recess structure 1091, and the end of the battery cell 113 is provided with a protruding structure 1133, when the electrode connecting piece 109 is assembled with the battery cell 113, the protruding structure 1133 of the battery cell 113 is located in the recess structure 1091. This is advantageous to shorten the distance of the whole energy device 100 along the axis direction of the battery cell 113, so that the energy device 100 is small in size. Specifically, the two ends of the battery cell 113 are both protruding structures.

[0183] Of course, in the production and processing of the electrode connecting piece 109, the recess structure 1091 of the electrode connecting piece 109 is formed by stamping, so that the opposite surface of the recess structure 1091 of the electrode connecting piece 109 is a protruding structure 1092, and the protruding structure 1133 of the battery cell 113 can also be connected with the protruding structure 1092 of the electrode connecting piece 109, so that there is enough heat dissipation gap between the end of the battery cell 113 and the electrode connecting piece 109, which is advantageous to the heat dissipation of the battery cell 113.

[0184] As shown in FIG. 4, FIG. 5 and FIG. 7, further, the electrode connecting piece 109 can be a rhombus structure, or a long strip structure. In a specific embodiment, when assembled, one end of the battery cell group can use the electrode connecting piece 109 of rhombus structure, and the other end uses the electrode connecting piece 109 of long strip structure. Of course, the two ends of the battery cell group can use the same structure of the electrode connecting piece 109, for example, the two ends of the battery cell group both use the electrode connecting piece 109 of rhombus structure (as shown in FIG. 4 or FIG. 5) or the two ends of the battery cell group both use the electrode connecting piece 109 of long strip structure (as shown in FIG. 7).

[0185] Please refer to FIG. 9 and FIG. 10 at the same time, in a specific embodiment, the BMS board 111 is connected with the positive electrode piece 112 and the negative electrode piece 114 respectively through a conductive piece 116, one side of the conductive piece 116 is used to be attached with the positive electrode piece 112 or the negative electrode piece 114, and the other side is used to be attached with the BMS board 111, the conductive piece 116 is arranged between the positive electrode piece 112 or the negative electrode piece 114 and the BMS board 111, so that the electrical contact between them is more stable.

[0186] As shown in FIG. 10, further, the edge of the conductive piece 116 is provided with a plurality of pins 1161, and the BMS board 111 is provided with a plurality of insertion holes matched with the pins 1161. The conductive piece 116 is in a sheet structure, preferably, a square sheet structure, and the pins 1161 are arranged at the four sides of the square sheet structure and are arranged towards the same side of the conductive piece 116. During installation, the pins 1161 are inserted into the insertion holes, and then the conductive piece 116 is welded on the BMS board 111 by welding, thereby increasing the stability and firmness of the connection between the two. When assembled, the positive electrode sheet 112 or the negative electrode sheet 114 is located below, the conductive piece 116 is located in the middle, and the BMS board 111 is located above, and then the positive electrode sheet 112 or the negative electrode sheet 114 is connected with the BMS board 111 by locking screws. The sheet structure of the conductive piece 116 is conducive to the full contact between the conductive piece 116 and the BMS board 111 and the positive electrode sheet 112 or the negative electrode sheet 114, thereby maintaining good electrical signal connection. Of course, the connection between the positive electrode sheet 112 or the negative electrode sheet 114 and the BMS board 111 can also be other fixing modes, such as buckle connection, adhesion, soldering, etc., as long as the normal connection between the two can be ensured.

[0187] In an embodiment, the collection piece 117 is connected with the BMS board 111 through a wire harness, so that the collection piece 117 can timely transmit the collected information of the battery cell 113 to the BMS board 111, and then control the charging and discharging of the battery cell 113 through the BMS board 111. Of course, the connection between the collection piece 117 and the BMS board 111 can also be other connection modes except the wire harness.

[0188] In an embodiment, the extension direction of the BMS board 111 is arranged in parallel with the axis direction of the battery cell 113, so that the layout between the BMS board 111 and the battery cell 113 is more compact, thereby saving space.

[0189] Please also refer to FIG. 11. In an embodiment, the outer surface of the mounting bracket 104 comprises a first matching surface 105, the mounting bracket 104 is provided with a mounting seat 115, the mounting seat 115 comprises a second matching surface 106, the positive electrode sheet 112 and the negative electrode sheet 114 are respectively provided with a first matching part 1121 and a second matching part 1122, the first matching part 1121 is used for matching with the first matching surface 105, and the second matching part 1122 is used for matching with the second matching surface 106. The arrangement of the plurality of matching parts increases the stability of the installation of the positive electrode sheet 112 and the negative electrode sheet 114.

[0190] In an embodiment, a surface of the mounting seat 115 forms a groove, and the groove is used for mounting the BMS board 111. The BMS board 111 is fixed in the groove of the mounting seat 115 by locking screws.

[0191] Further, the first fitting part 1121 and the second fitting part 1122 of the positive electrode sheet 112 are both arranged to extend towards the same side of the positive electrode sheet 112, and the first fitting part 1121 and the second fitting part 1122 of the negative electrode sheet 114 are both arranged to extend towards the same side of the negative electrode sheet 114. Specifically, the first fitting part 1121 and the second fitting part 1122 are part of the positive electrode sheet 112, and after the first fitting part 1121 is bent towards one side of the positive electrode sheet 112, it is bent again to form the second fitting part 1122. Similarly, the first fitting part 1121 of the negative electrode sheet 114 is bent towards one side of the positive electrode sheet 112, and then it is bent again to form the second fitting part 1122. In a specific operation, the first fitting part 1121 and the second fitting part 1122 both extend towards one side of the mounting bracket 104, so as to realize stable connection with the BMS board 111.

[0192] Further, an inclined surface 1123 is formed at the connection between the first fitting part 1121 and the second fitting part 1122 of the positive electrode sheet 112 or the negative electrode sheet 114, which cooperates with an inclined surface of the mounting seat 115, so as to increase the fitting degree of the positive electrode sheet 112 or the negative electrode sheet 114 with the mounting seat 115, and further increase the stability of the installation of the positive electrode sheet 112 or the negative electrode sheet 114.

[0193] Please refer to FIG. 3, in a specific embodiment, the mounting seat 115 is further provided with a limiting part 123, which is used for limiting cooperation with the side surface of the positive electrode sheet 112 or the negative electrode sheet 114, further increasing the stability of the installation of the positive electrode sheet 112 or the negative electrode sheet 114. It is also beneficial for the operator to quickly cooperate the positive electrode sheet 112 or the negative electrode sheet 114 with the mounting seat 115 when installing the positive electrode sheet 112 or the negative electrode sheet 114, improving the efficiency of assembly.

[0194] In a specific embodiment, in order to reduce the shaking of the battery cell 113 in the mounting bracket 104, the mounting bracket 104 is provided with a plurality of assembly parts 107 suitable for assembling the battery cell 113, and the assembly part 107 is provided with a limiting part 108 for limiting the movement of the battery cell 113. Generally, the assembly part 107 is a mounting groove, and during assembly, the battery cell 113 is assembled in the mounting groove. Through the arrangement of the limiting part 108, the shaking of the battery cell 113 is limited, generally limiting the shaking of the battery cell 113 in its axial and radial directions, which can effectively prevent the damage of the outer wall of the battery cell 113 caused by large shaking, so as to prevent the leakage.

[0195] Further, the limiting member 108 is protruded from the inner wall of the assembly portion 107 to the inner cavity of the assembly portion 107, and the surface of the limiting member 108 matched with the battery cell 113 is a guide surface. When the battery cell 113 is assembled into the assembly portion 107, the guide surface is beneficial to guide the movement of the battery cell 113 into the assembly portion 107, and the limiting member 108 is matched with the outer wall of the battery cell 113 through interference fit, so as to limit the battery cell 113 in the assembly portion 107.

[0196] Further, the battery cell 113 is a cylindrical battery cell 113, the assembly portion 107 is a circular assembly portion 107, and the ratio of the length of the limiting member 108 in the radial direction of the battery cell 113 to the length of the diameter of the battery cell 113 is greater than or equal to 0.02 and less than or equal to 0.05. Such a setting ensures that the limiting member 108 plays a limiting role on the battery cell 113, and at the same time, the limiting member 108 also occupies a smaller space in the radial direction of the assembly portion 107, so that when planning the assembly portion 107, the overall size of the assembly portion 107 will not be too large due to the large size of the limiting member 108, which is helpful for the compact design of the energy equipment 100. Preferably, the ratio of the length of the limiting member 108 in the radial direction of the battery cell 113 to the length of the diameter of the battery cell 113 is 0.02, 0.03 or 0.05.

[0197] As shown in FIGS. 12, 14 and 15, in a specific embodiment, the end of the assembly portion 107 is provided with a supporting portion 118, and the ratio of the projection area of the supporting portion 118 to the projection area of a single end surface 1131 of the battery cell 113 in the axial direction of the battery cell 113 is greater than or equal to 0.002 and less than or equal to 0.003. Such a setting is also to ensure that the limiting member 108 plays a limiting role on the battery cell 113, and at the same time, the limiting member 108 occupies a smaller space.

[0198] The supporting portion 118 is used to limit the battery cell 113 during assembly, so that the battery cell 113 remains in the assembly portion 107.

[0199] Please refer to FIG. 13 further, and the ratio of the projection area of the supporting portion 118 to the projection area of a single end surface 1131 of the battery cell 113 in the axial direction of the battery cell 113 is greater than or equal to 0.0025 and less than or equal to 0.0028. Preferably, the ratio of the projection area of the supporting portion 118 to the projection area of a single end surface 1131 of the battery cell 113 is 0.0025, 0.0026 or 0.0028. Such a setting makes the area of the supporting portion 118 smaller, and thus the caliber of the through hole 110 at the end of the assembly portion 107 is larger, which is beneficial to the heat dissipation of the battery cell 113, and also beneficial to the battery cell 113 to leak more parts through the through hole 110, so that the remaining electrode connecting piece 109 or the positive electrode connecting piece or the negative electrode connecting piece can be connected.

[0200] In an embodiment, the middle part of the assembly part 107 and any one of the two ends thereof are provided with a limiting part 108. In this way, multiple limiting parts 108 are arranged in the axial direction of the battery cell 113, which further helps to limit the shaking of the battery cell 113 in the assembly part 107 and improves the stability of the battery cell 113.

[0201] Specifically, the limiting part 108 is a protrusion formed radially inward from the inner wall of the assembly part 107.

[0202] In an embodiment, multiple limiting parts 108 are provided, preferably, the inner wall of one assembly part 107 is provided with three limiting parts 108, and the three limiting parts 108 can be on the same horizontal plane 120 in the axial direction or on different horizontal planes 120.

[0203] As shown in FIG. 16, in an embodiment, the mounting bracket 104 is provided with a damping structure 119. Further, the damping structure 119 is damping foam provided on the outer periphery of the mounting bracket 104. This helps to buffer the shaking of the mounting bracket 104 and the battery cell 113 in the shell, reducing the damage to the battery cell 113.

[0204] As shown in FIG. 1, further, the shell is provided with heat dissipation grooves 122, which are provided on two opposite surfaces of the shell to facilitate convection, specifically, in the up-down direction of the shell. The provision of the heat dissipation grooves 122 helps to dissipate the heat generated during the charging or discharging of the battery cell 113.

[0205] As shown in FIG. 1, the upper part of the shell is provided with a handle 121, which facilitates the carrying of the energy device 100, so that the energy device 100 can be assembled with other devices for charging or discharging the energy device 100.

[0206] In an embodiment, the ratio of the area of the side wall 1132 of the battery cell 113 located in the assembly part 107 to the total area of the side wall 1132 of the battery cell 113 is greater than or equal to 1 / 3 and less than or equal to 1 / 2. Such a configuration makes the area surrounded by the assembly part 107 not more than half of the side wall 1132 of the battery cell 113, which is conducive to the heat dissipation of the battery cell 113 and alleviates the risk of self-ignition. Preferably, the ratio of the area of the side wall 1132 of the battery cell 113 located in the assembly part 107 to the total area of the side wall 1132 of the battery cell 113 is 1 / 3, 2 / 5 or 1 / 2.

[0207] As shown in FIG. 17, the present application also provides an outdoor working device, which comprises the above-mentioned energy device 100, the energy device 100 comprising: a housing and a plurality of battery cells 113 arranged in the housing; the plurality of battery cells 113 are configured as: a first battery cell group comprising two rows of output battery cell groups 101 having the same height on a plane 120, the output battery cell groups 101 being configured to be connected with a positive electrode or a negative electrode of the energy device 100 to output electric energy externally; and a second battery cell group comprising an odd-row battery cell group 102 and an even-row battery cell group 103, the odd-row battery cell group 102 and the even-row battery cell group 103 being arranged alternately on the plane 120; wherein the height of the output battery cell groups 101 is different from the height of the odd-row battery cell group 102 and the height of the even-row battery cell group 103.

[0208] The outdoor working device comprises a main frame 200, a seat 400, a power output assembly 600, a walking assembly 500, an operation assembly 300 and a power supply device.

[0209] Further, the main frame 200 extends along a first straight line direction parallel to the front-rear direction thereof on the working surface. The seat 400 is mounted on the main frame 200 for a user to sit on. The main frame 200 is also used to mount the power output assembly 600, the walking assembly 500, the operation assembly 300 and the power supply device. The power supply device is used to provide a power source for the entire outdoor working device, such as enabling the cutting assembly to perform cutting work, enabling the walking assembly 500 to support the main frame 200 and the related assemblies thereon to walk and other power consumption units. The power supply device comprises a battery compartment and a battery pack, which can be the above-mentioned energy device 100.

[0210] The power output assembly 600 is a workpiece for realizing a tool function. In the present embodiment, the outdoor working device is a riding lawn mower, and the power output assembly 600 is specifically a cutting assembly for outputting power to realize the mowing function of the riding lawn mower. The cutting assembly is provided in two or three groups. The cutting assembly is arranged below the main frame 200. In an embodiment, the cutting assembly comprises a cutter head, a mowing element and a cutting motor. The mowing element is used to cut grass and other vegetation when rotating at a high speed. For example, the mowing element is a blade for cutting vegetation on a lawn. The cutter head is formed with a mowing space for accommodating the mowing element, and the mowing element is at least partially located in the mowing space. In some embodiments, the number of mowing elements can be two, and correspondingly, the number of cutting motors is also two. The two cutting motors independently drive the two mowing elements, respectively. In some embodiments, the number of mowing elements can be three, and correspondingly, the number of cutting motors is also three. The three cutting motors independently drive the three mowing elements, respectively.

[0211] Of course, the power output assembly 600 can also be detached from the outdoor working device. In some embodiments, it can be understood that the power output assembly 600 can be replaced by other assemblies, so that the outdoor working device can not only cut vegetation, but also replace the cutting assembly with a snow shoveling, snow sweeping, snow blowing, or flushing functional component. Those skilled in the art should be able to adapt various functional components without creative labor, and the above should be included in the protection scope of the present embodiment.

[0212] The walking assembly 500 includes walking wheels arranged on the main frame 200 and walking motors for driving the walking wheels. The walking wheels are arranged on both sides of the main frame 200, so that the center of gravity of the outdoor working device is kept within the main frame 200, so as to reduce the probability of the outdoor working device rolling over when walking. In an embodiment, the number of walking wheels is set to 4, including 2 front walking wheels and 2 rear walking wheels. The front walking wheels can be universal wheels, and the walking motors are connected with the rear walking wheels and drive the rear walking wheels to rotate. The two rear walking wheels are matched with the walking motors, and the rotation speeds of the two walking motors can be the same or different. When the user drives the outdoor working device straight, the rotation speeds of the two walking motors are substantially the same. When the user drives the outdoor working device to turn, the rotation speeds of the two walking motors are different, and the outdoor working device turns to the side with a lower rotation speed of the walking motor. In some embodiments, the diameter of the front walking wheel is smaller than that of the rear walking wheel. Of course, the number of walking wheels can also be set to 3 or 5.

[0213] In an embodiment, the walking wheels can be configured as walking devices of other structures supporting the walking of the outdoor working device.

[0214] The operation assembly 300 includes left and right operation levers arranged on the left and right sides of the outdoor working device. The user controls the left and right operation levers to control the outdoor working device to move forward, backward, or turn. The operation assembly 300 can also be a steering wheel capable of controlling the outdoor working device. The present application also includes a brake assembly arranged on the upper surface of the front of the main frame 200, for the user to step on to control the running state of the outdoor working device.

[0215] The power supply device is arranged at the rear of the outdoor working equipment, and the power supply device comprises a battery pack, a BMS control board for controlling the output and input of the battery pack, and a battery compartment for mounting the battery pack. The battery pack is specifically the energy device 100, and the battery pack is electrically connected with the electrical connection terminal on the battery compartment through the electrical connection terminal thereon to supply power for the outdoor working equipment. Preferably, the battery compartment can be arranged to accommodate battery packs with different capacities to increase the adaptability of the outdoor working equipment to different battery packs. The battery pack can also be detached to supply power for other electric tools, thereby increasing the multipurpose use of the battery pack. Compared with the conventional use of fossil fuels as an energy source, the outdoor working equipment of the present application is more environmentally friendly and more in line with long-term development planning. Preferably, the battery pack preferably uses lithium iron phosphate cells or ternary lithium cells.

[0216] As shown in FIGS. 18, 19 and 20, a structural schematic diagram of the outdoor working equipment in another embodiment is shown.

[0217] The outdoor working equipment can be implemented as an agricultural working vehicle, which can be specifically exemplified as a UTV vehicle as shown in FIGS. 18 and 19 or a tractor as shown in FIG. 20. The battery compartment can be arranged at the front of the vehicle body of the UTV vehicle or the tractor, and the battery compartment is provided with an openable battery compartment cover at the top, and the battery pack is arranged inside the battery compartment. Of course, the battery pack can also be arranged below the seat of the UTV vehicle or the tractor.

[0218] The connection between the battery pack and the UTV vehicle or the tractor is a detachable connection, so as to replace the battery pack.

[0219] In the present embodiment, the operating assembly 300 is a steering wheel 300 on the UTV vehicle or the tractor, which can be used to control the steering of the UTV vehicle or the tractor, and the display screen can be positioned on the steering wheel 300.

[0220] Specifically, the display screen can display the power of the battery pack, which is helpful for the user to determine the working area of the outdoor working equipment according to the remaining power, so as to replace the battery pack.

[0221] The display screen can also display the information of the cell 113 collected in real time by the electrode connecting piece 109 or the positive electrode piece 112 or the negative electrode piece 114, so that the user or the maintenance personnel can accurately obtain the position of the faulty cell 113 when a fault occurs, so as to timely maintain or replace the cell 113.

[0222] Of course, the display screen can also display the working temperature of the battery pack. Since excessively high or low temperature will affect the actual endurance of the battery, and excessively high temperature will cause the battery pack to self-ignite, causing dangerous accidents, the working temperature of the battery pack can be understood in real time through the display screen, and corresponding disposal can be performed, such as shutdown and the like.

[0223] The steering wheel 300 is located in front of the seat on the frame, and the upper surface can be inclined at an angle towards the seat, facilitating the user to operate the steering wheel 300 and to face the user's face, so as to facilitate the user to view the display screen. The steering wheel 300 can also be provided as an angle-adjustable structure to meet the needs of different users for the inclination angle of the display screen. The steering wheel 300 can also be provided as an adjustable height, which can be adjusted according to the height requirement of the user when the user of different height uses. The height of the steering wheel can be manually adjusted or electrically adjusted.

[0224] Exemplarily, FIG. 18 and FIG. 19 are both UTV vehicles, wherein FIG. 18 shows a single-row seat UTV vehicle, and FIG. 19 shows a double-row seat UTV vehicle. The tail of the single-row seat UTV vehicle and the double-row seat UTV vehicle can be provided with an accessory mechanism, such as a carrying bucket, etc.

[0225] Exemplarily, FIG. 20 shows a tractor, and the tail of the tractor can be hung with a drag bucket.

[0226] The present application is not limited to the above specific embodiments. Those skilled in the art can easily understand that the present application has many alternatives without departing from the principles and scope of the present application. The protection scope of the present application is subject to the contents of the claims.

Claims

1. An energy device comprising a housing and a plurality of cells disposed within the housing, wherein, The plurality of battery cells are configured as: The first battery cell group comprises two rows of output battery cell groups with the same height on a plane, and the output battery cell groups are configured to be connected to the positive electrode or the negative electrode of the energy equipment to output electric energy externally; The second battery cell group comprises an odd-numbered row battery cell group and an even-numbered row battery cell group, and the odd-numbered row battery cell group and the even-numbered row battery cell group are arranged alternately on the plane; The height of the output battery cell group is different from the height of the odd-numbered row battery cell group and the height of the even-numbered row battery cell group.

2. The energy device of claim 1, wherein: The height of the output battery cell group is between the height of the odd-numbered row battery cell group and the height of the even-numbered row battery cell group.

3. The energy device of claim 2, wherein: The two rows of output battery cell groups are arranged at two ends of the arrangement direction of the second battery cell group.

4. The energy device of claim 1, wherein: The cell axis of the odd-numbered row battery cell group and the cell axis of the even-numbered row battery cell group are not on the connecting line between the axes of the cells of the two rows of output battery cell groups with the same height.

5. The energy device of claim 1, wherein: At least one of the two rows of output battery cell groups is arranged between the second battery cell groups.

6. The energy device of claim 1, wherein: The lengths of the output battery cell group, the odd-numbered row battery cell group, and the even-numbered row battery cell group are the same.

7. The energy device of claim 1, wherein: Each of the first battery cell group and the second battery cell group comprises an even number of battery cells, and the even number of battery cells are connected in parallel two by two.

8. The energy device of claim 1, wherein: One row of the two rows of output battery cell groups is used to connect a positive electrode sheet, and the other row is used to connect a negative electrode sheet, and the positive electrode sheet and the negative electrode sheet have the same height.

9. The energy device of claim 8, wherein: Further comprising a mounting bracket arranged in the shell, a plurality of battery cells are arranged in the mounting bracket, and an acquisition part for acquiring information of the plurality of battery cells is arranged on the mounting bracket, a first connecting part is arranged on the acquisition part, a plurality of electrode connecting sheets are connected between the battery cells, a second connecting part is arranged on the electrode connecting sheet, and the first connecting part is used to connect with the second connecting part.

10. The energy device of claim 9, wherein: The first connecting part is a hole on the acquisition part, and the second connecting part is a connecting piece that can be matched with the hole.

11. The energy device of claim 9, wherein: Both ends of the plurality of battery cells are connected with electrode connecting sheets, and along the axis direction parallel to the battery cells, the projection area of the acquisition part and the projection area sum of all electrode connecting sheets at one end of the battery cells have a ratio greater than or equal to 1 / 3 and less than or equal to 1 / 2.

12. The energy device of claim 9, wherein: The area where the electrode connecting sheet is connected with the battery cell is provided with a recess structure, and the end of the battery cell is provided with a protruding structure, and when the electrode connecting sheet is assembled with the battery cell, the protruding structure of the battery cell is located in the recess structure.

13. The energy device of claim 9, wherein: A BMS board is further arranged in the shell, and a conductive piece is connected between the BMS board and the positive electrode sheet and the negative electrode sheet, respectively, one side of the conductive piece is used to be arranged in close contact with the positive electrode sheet or the negative electrode sheet, and the other side is used to be arranged in close contact with the BMS board.

14. The energy device of claim 13, wherein: The edge of the conductive piece is provided with a plurality of pins, and the BMS board is provided with a jack matched with the pins.

15. The energy device of claim 9, wherein: The outer surface of the mounting bracket comprises a first matching surface, the mounting bracket is provided with a mounting seat, the mounting seat comprises a second matching surface, the positive electrode sheet and the negative electrode sheet are respectively provided with a first matching part and a second matching part, the first matching part is used for matching with the first matching surface, and the second matching part is used for matching with the second matching surface.

16. The energy device of claim 15, wherein: The first matching part and the second matching part of the positive electrode sheet are both arranged to extend towards the same side of the positive electrode sheet, and the first matching part and the second matching part of the negative electrode sheet are both arranged to extend towards the same side of the negative electrode sheet.

17. The energy device of claim 15, wherein: The mounting seat is further provided with a limiting part for limiting cooperation with the side surface of the positive electrode sheet or the negative electrode sheet.

18. The energy device of claim 1, wherein: Further comprising a mounting bracket arranged in the shell, the mounting bracket is provided with a plurality of assembly parts suitable for assembling the battery cell, and the assembly part is provided with a limiting part for limiting the movement of the battery cell.

19. The energy device of claim 18, wherein: The limiting part is protrudingly arranged from the inner wall of the assembly part to the inner cavity of the assembly part, and the surface of the limiting part matched with the battery cell is a guide surface.

20. The energy device of claim 18, wherein: The battery cell is a cylindrical battery cell, the assembly part is a circular assembly part, the length ratio of the length of the limiting part in the radial direction of the battery cell to the length of the diameter of the battery cell is greater than or equal to 0.02 and less than or equal to 0.

05.

21. The energy device of claim 18, wherein: The middle part of the assembly part and any one of the two ends thereof are provided with the limiting part.

22. The energy device of claim 1, wherein: The shell is further provided with a mounting bracket for mounting the battery cell, and the mounting bracket is provided with a damping structure.

23. The energy device of claim 1, wherein: The shell is provided with a heat dissipation slot, and the heat dissipation slot is arranged on two opposite surfaces of the shell.

24. An energy device comprising a housing and a plurality of cells disposed within the housing, wherein, A plurality of battery cells are configured as: A first battery cell group comprising at least two rows of output battery cell groups having the same height on a plane, the output battery cell groups being configured to be connected to the positive electrode or the negative electrode of the energy equipment to output electric energy externally; A second battery cell group comprising an odd-numbered row of battery cell groups and an even-numbered row of battery cell groups, the odd-numbered row of battery cell groups and the even-numbered row of battery cell groups being arranged alternately on the plane; Wherein, the height of the output battery cell group is different from the height of the odd-numbered row of battery cell groups and the height of the even-numbered row of battery cell groups; A mounting bracket arranged in the shell, the mounting bracket is provided with a plurality of assembly parts suitable for assembling the battery cell, and the assembly part is provided with a limiting part for limiting the movement of the battery cell.

25. The energy device of claim 24, wherein: The height of the output battery cell group is between the height of the odd-numbered row of battery cell groups and the height of the even-numbered row of battery cell groups.

26. The energy plant of claim 24, wherein: The battery cell axis of the odd-numbered row of battery cell groups and the battery cell axis of the even-numbered row of battery cell groups are not on the connecting line between the axes of the battery cells of the two rows of output battery cell groups having the same height.

27. An outdoor work device characterized by comprising: Comprising: An energy equipment, The energy equipment comprises: A shell and a plurality of battery cells arranged in the shell; A plurality of battery cells are configured as: A first battery cell group comprising two rows of output battery cell groups having the same height on a plane, the output battery cell groups being configured to be connected to the positive electrode or the negative electrode of the energy equipment to output electric energy externally; The second cell group comprises an odd-numbered row cell group and an even-numbered row cell group, and the odd-numbered row cell group and the even-numbered row cell group are arranged alternately on the plane. The height of the output cell group is different from the height of the odd-numbered row cell group and the height of the even-numbered row cell group.

28. The outdoor work apparatus according to claim 27, characterized by: The height of the output cell group is between the height of the odd-numbered row cell group and the height of the even-numbered row cell group.

29. The outdoor work apparatus according to claim 27, characterized by: The cell axis of the odd-numbered row cell group and the cell axis of the even-numbered row cell group are not on the line between the axes of the cells of the two rows of output cell groups with the same height.

30. The outdoor work apparatus according to claim 27, characterized by: At least one of the two rows of output cell groups is arranged between the second cell group.

31. An outdoor work device characterized by comprising: Comprise: A power output assembly is arranged to output power to perform outdoor work; A walking assembly is arranged to support the outdoor work equipment to walk; And, An energy equipment is arranged to provide electric energy for the outdoor work equipment; The energy equipment comprises a shell, and the shell is internally provided with: A plurality of cells configured to be mounted in the shell; A mounting bracket is arranged in the shell, and a plurality of assembly parts for mounting the cells are arranged in the mounting bracket, and a limiting piece for limiting the movement of the cells is arranged in each assembly part.

32. The outdoor work equipment of claim 31, wherein: The limiting piece is protrudingly arranged in the assembly part by the inner wall of the assembly part.

33. The outdoor work apparatus according to claim 31, characterized by: The cell is a cylindrical cell, the assembly part is a circular assembly part, and the ratio of the length of the limiting piece in the direction parallel to the cell axis to the length of the cell in the axial direction is greater than or equal to 0.02 and less than or equal to 0.

05.

34. The outdoor work apparatus of claim 31, wherein: The end of the assembly part is provided with a limiting part, and the ratio of the projection area of the limiting part to the projection area of a single end surface of the cell in the direction along the axis of the cell is greater than or equal to 0.002 and less than or equal to 0.

003.

35. The outdoor work apparatus according to claim 34, characterized by: The ratio of the projection area of the limiting part to the projection area of a single end surface of the cell in the direction along the axis of the cell is greater than or equal to 0.0025 and less than or equal to 0.0028.

36. The outdoor work apparatus of claim 31, wherein: The ratio of the area of the side wall of the cell located in the assembly part to the area of the entire side wall of the cell is greater than or equal to 1 / 3 and less than or equal to 1 / 2.

37. The outdoor work apparatus of claim 31, wherein: The limiting piece is arranged at the middle part of the assembly part and any one of the two ends thereof.

38. The outdoor work apparatus of claim 31, wherein: The shortest distance between the cells assembled in the assembly part is greater than or equal to 2 mm.

39. The outdoor work apparatus of claim 31, wherein: The mounting bracket comprises a first bracket and a second bracket, and the first bracket and the second bracket are both provided with assembly parts.

40. The outdoor work apparatus according to claim 39, characterized by: The cells are connected by electrode connecting sheets, and the first bracket and the second bracket are both provided with through holes for the electrode connecting sheets to communicate with the assembly parts.

41. A battery pack comprising a housing and a plurality of cells disposed within the housing, wherein, A plurality of the cells are configured as a plurality of cell groups, at least two of the plurality of cell groups have the same height on a plane, and the cell groups with the same height are configured as output cell groups connected to the positive electrode or the negative electrode of the battery pack to output electric energy.

42. The battery pack of claim 41, wherein: The plurality of cell groups further comprise an odd-numbered row cell group and an even-numbered row cell group, and the odd-numbered row cell group and the even-numbered row cell group are arranged alternately on the plane.

43. The battery pack of claim 42, wherein: The height of the output cell group is between the height of the odd row cell group and the height of the even row cell group.

44. The battery pack of claim 42, wherein: Two rows of the output cell groups are arranged at two ends of the odd row cell group and the even row cell group in the arrangement direction.

45. The battery pack of claim 42, wherein: At least one row of the two rows of the output cell groups is arranged between the odd row cell group and the even row cell group.

46. The battery pack of claim 44 or 45, wherein: The length of the output cell group, the odd row cell group and the even row cell group is the same.

47. The battery pack of claim 44 or 45, wherein: One row of the two rows of the output cell groups is used for connecting the positive electrode sheet, and the other row is used for connecting the negative electrode sheet, and the height of the positive electrode sheet and the negative electrode sheet is the same.

48. The battery pack of claim 47, wherein: Further comprising a mounting bracket arranged in the shell, a plurality of the cells are arranged in the mounting bracket, the mounting bracket is provided with a collection piece for collecting information of a plurality of the cells, the collection piece is provided with a first connecting part, a plurality of electrode connecting sheets are connected between the cells, the electrode connecting sheets are provided with a second connecting part, and the first connecting part is used for connecting with the second connecting part.

49. The battery pack of claim 48, wherein: The shell is further provided with a BMS board connected with the collection piece, and a positive electrode sheet and a negative electrode sheet connected with the cells, and the BMS board is respectively connected with the positive electrode sheet and the negative electrode sheet through a conductive piece.

50. An outdoor work apparatus characterized by comprising: Comprise: A power output assembly arranged to output power to perform outdoor work; A walking assembly arranged to support the outdoor work equipment to walk; And The battery pack of any one of claims 41 to 49 is configured to provide electrical energy for the outdoor work equipment.

51. A battery pack for an outdoor work device, characterized by Comprise: A shell; A mounting bracket arranged in the shell, and a plurality of cells arranged on the mounting bracket; A plurality of electrode connecting sheets configured to connect the positive or negative electrodes of the cells; At least two collection pieces arranged on the mounting bracket, and configured to be connected with the electrode connecting sheets and used to collect electrical energy information of the cells, wherein the collection piece is provided with a first connecting part, a plurality of electrode connecting sheets are connected between the cells, the electrode connecting sheets are provided with a second connecting part, and the first connecting part is used for connecting with the second connecting part.

52. The battery pack for outdoor work equipment according to claim 51, characterized by: The first connecting part is a hole on the collection piece, and the second connecting part is a connecting piece capable of being matched with the hole.

53. The battery pack for outdoor work equipment according to claim 51, characterized by: The extension direction of the collection piece is perpendicular to the axis direction of the cell.

54. The battery pack for outdoor work equipment according to claim 51, characterized by: Further comprising a mounting bracket arranged in the shell, a plurality of the cells are arranged in the mounting bracket, and the collection piece is arranged on the mounting bracket and used to collect information of a plurality of the cells.

55. The battery pack for outdoor work equipment according to claim 51, characterized by: Both ends of a plurality of the cells are connected with electrode connecting sheets, and along the axis direction parallel to the cells, the projection area of the collection piece and the projection area sum of all the electrode connecting sheets of one end of the cells have a ratio of greater than or equal to 1 / 3 and less than or equal to 1 / 2.

56. The battery pack for outdoor work equipment of claim 51, wherein: The shell is further provided with a BMS board connected with the collection piece, and a positive electrode sheet and a negative electrode sheet connected with the cells, and the BMS board is respectively connected with the positive electrode sheet and the negative electrode sheet through a conductive piece.

57. The battery pack for outdoor work equipment according to claim 56, characterized by: The edge of the conductive piece is provided with a plurality of pins, and the BMS board is provided with a plurality of pinholes matched with the pins.

58. The battery pack for outdoor work equipment according to claim 57, characterized by: The extension direction of the BMS board is parallel to the axis direction of the battery cell.

59. The battery pack for outdoor work equipment according to claim 58, characterized by: The thickness of the electrode connecting piece is greater than 0.5 mm and less than or equal to 1.8 mm.

60. An outdoor work apparatus characterized by comprising: Comprise: a power output assembly configured to output power to perform outdoor work; a walking assembly configured to support the outdoor work equipment to walk; and, The battery pack for outdoor work equipment as claimed in any one of claims 51 to 59 is configured to provide electric energy for the outdoor work equipment.

61. A battery pack for outdoor work equipment, the outdoor work equipment comprising: a power output assembly configured to output power to perform outdoor work; a walking assembly configured to support the outdoor work equipment to walk; characterized in that the battery pack comprises: a shell; a plurality of battery cells arranged in the shell, the sum of the energy of the plurality of battery cells being not less than 2000 Wh; The energy density of the battery pack is greater than or equal to 0.28 Wh / cm 3 .

62. The battery pack for outdoor work equipment according to claim 61, characterized by: The energy density of the battery pack is greater than or equal to 0.3 Wh / cm 3 .

63. The battery pack for outdoor work equipment according to claim 61, characterized by: the shell is further provided with a mounting rail, and the ratio of the length of the mounting rail to the height of the battery pack is less than 0.

5.

64. The battery pack for outdoor work equipment of claim 61, wherein: The diameter of the battery cell is greater than or equal to 40 mm, and the length of the battery cell is greater than or equal to 135 mm.

65. The battery pack for outdoor work equipment of claim 61, wherein: The length of the shell is less than or equal to 372 mm, the width of the shell is less than or equal to 170 mm, and the height of the shell is less than or equal to 239 mm.

66. The battery pack for outdoor work equipment of claim 61, wherein: The ratio of the length of the battery cell to the width of the shell is greater than or equal to 0.

8.

67. The battery pack for outdoor work equipment according to claim 61, characterized by: The number of battery cells is not less than 32.

68. The battery pack for outdoor work equipment of claim 61, wherein: The shell is further provided with a mounting bracket for mounting the battery cell, the mounting bracket comprises a first bracket and a second bracket, the first bracket and the second bracket are both provided with an assembly part for assembling the battery cell, and the assembly part is provided with a limiting piece for fixing the battery cell.

69. The battery pack for outdoor work equipment of claim 61, wherein: The weight of the battery pack is greater than or equal to 15 kg.

70. The battery pack for outdoor work equipment of claim 61, wherein: The capacity of the battery pack is greater than or equal to 30 Ah, and the ratio of the capacity to the weight of the battery pack is greater than or equal to 2 Ah / kg.

71. The battery pack for outdoor work equipment of claim 61, wherein: The battery cell is a lithium iron phosphate battery cell or a ternary lithium battery cell.

72. A battery pack for outdoor work equipment, the outdoor work equipment comprising: a power output assembly configured to output power to perform outdoor work; a walking assembly configured to support the outdoor work equipment to walk; characterized in that the battery pack comprises: a shell, which is detachably mounted on the outdoor work equipment; a plurality of battery cells arranged in the shell, the diameter of the battery cell being greater than or equal to 40 mm, and the length of the battery cell being greater than or equal to 135 mm; wherein the ratio of the length of the battery cell to the width of the shell is greater than or equal to 0.

7.

73. The battery pack for outdoor work equipment according to claim 72, characterized by: The shell is further provided with a mounting bracket for mounting the battery cell, and the ratio of the width of the mounting bracket to the width of the shell is not less than 0.

9.

74. The battery pack for outdoor work equipment according to claim 73, characterized by: Both ends of the battery cell are provided with an electrode connecting piece, both sides of the mounting bracket are provided with a signal collecting piece for collecting the signal of the electrode connecting piece, and the upper part of the mounting bracket is provided with a BMS board electrically connected with the signal collecting piece.

75. The battery pack for outdoor work equipment according to claim 72, characterized by: The alternating current internal resistance of the battery cell when charging is less than or equal to 5 mΩ, and the direct current internal resistance of the battery cell when discharging is less than or equal to 8 mΩ.

76. The battery pack for outdoor work equipment of claim 72, wherein: The charge limit voltage of the battery cell is less than or equal to 5V.

77. The battery pack for outdoor work equipment of claim 72, wherein: The charge cut-off current of the battery cell is less than or equal to 1200mAh.

78. The battery pack for outdoor work equipment of claim 72, wherein: The standard discharge current of the battery cell is greater than or equal to 10000mAh.

79. The battery pack for outdoor work equipment of claim 72, wherein: The length of the shell is less than or equal to 372mm, the width of the shell is less than or equal to 170mm, and the height of the shell is less than or equal to 239mm.

80. The battery pack for outdoor work equipment of claim 72, wherein: The outdoor work equipment battery pack comprises at least two electric connection terminals, and the two electric connection terminals are symmetrically arranged.

81. The battery pack for outdoor work equipment according to claim 80, characterized by: The distance between the electric connection terminal and the bottom surface of the battery pack is less than 30mm.

82. The battery pack for outdoor work equipment of claim 72, wherein: The ratio of the cross-sectional area of a single battery cell along its radial direction to the projected area of the battery pack along its width direction is greater than or equal to 0.

01.

83. The battery pack for outdoor work equipment of claim 72, wherein: The upper and lower parts of the shell of the battery pack are provided with heat dissipation slots, a plurality of battery cells form a battery cell module, and the length of the battery cell module along its width direction is less than its length along its length direction.

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