Battery pack for outdoor operation equipment

Abstract

The utility model discloses a battery pack for outdoor operation equipment, and the battery pack for the outdoor operation equipment comprises a power output assembly which is set to output power so as to execute outdoor operation; the walking assembly is arranged to support the outdoor operation equipment to walk; the battery pack is characterized in that the battery pack comprises a shell which is detachably installed on outdoor operation equipment; the battery cells are arranged in the shell, the diameter of the battery is greater than or equal to 40mm, and the length of the battery cells is greater than or equal to 13.5 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. According to the battery pack for the outdoor operation equipment, the ratio of the length of the battery cells to the width of the shell is set to be greater than or equal to 0.7, so that the space of the shell is utilized more sufficiently, and the battery cells are arranged more compactly, so that a larger space of the outdoor operation equipment cannot be occupied under the condition that a plurality of battery packs are placed on the outdoor operation equipment.

Description

[Technical field]

[0001] The present application relates to the technical field of battery packs, and in particular to a battery pack for outdoor working equipment. [Background Technology]

[0002] A battery pack is generally formed by connecting multiple single cells in series and parallel, and also incorporates a battery management system (BMS, Battery Management Systems), etc., so it can be directly used as an independent module in other devices.

[0003] However, the existing battery packs for outdoor working equipment are generally large in size. When they are installed on outdoor working equipment, they will occupy more space. However, the space left for installing battery packs on outdoor working equipment is limited, so the number of battery packs that can be installed in the limited space is limited.

[0004] In view of this, it is indeed necessary to provide an improved battery pack for outdoor work equipment to overcome the defects of the prior art. [Contents of the utility model]

[0005] In view of the deficiencies in the prior art, the purpose of the present application is to provide a battery pack for outdoor working equipment, which optimizes the structural layout of the battery pack.

[0006] The technical solution adopted by the present application to solve the problems of the prior art is: a battery pack for outdoor work equipment, the outdoor work equipment comprising: 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 comprising: a shell, detachably mounted on the outdoor work equipment; a plurality of battery cells, arranged in the shell, the diameter of the battery is greater than or equal to 40 mm, and the length of the battery cell is 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.

[0007] A further improvement is that a mounting bracket for mounting the battery cell is further provided in the shell, and the ratio of the width of the mounting bracket to the width of the shell is not less than 0.9.

[0008] A further improvement is that electrode connecting pieces are provided at both ends of the battery cell, collecting pieces for collecting signals from the electrode connecting pieces are provided on both sides of the mounting bracket, and a BMS board connected to the electrical signals of the collecting pieces is provided on the upper part of the mounting bracket.

[0009] A further improvement is that the AC internal resistance of the battery cell during charging is less than or equal to 5 mΩ, and the DC internal resistance of the battery cell during discharging is less than or equal to 8 mΩ.

[0010] A further improvement is that the charging limit voltage of the battery cell is less than or equal to 5V.

[0011] A further improvement is that the charging cut-off current of the battery cell is less than or equal to 1200 mAh.

[0012] A further improvement is that the standard discharge current of the battery cell is greater than or equal to 10000 mAh.

[0013] A 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.

[0014] A further improvement is that the battery pack for outdoor working equipment includes at least two electrical connection terminals, and the two electrical connection terminals are symmetrically arranged.

[0015] A further improvement is that the distance between the electrical connection terminal and the bottom surface of the battery pack is less than 30 mm.

[0016] A further improvement is that 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.

[0017] A further improvement is that the upper and lower parts of the shell of the battery pack are both provided with heat dissipation grooves, a plurality of the battery cells form a battery cell module, and the length of the battery cell module along its width direction is shorter than its length along its length direction.

[0018] Compared with the prior art, this application has the following beneficial effects:

[0019] The battery pack for outdoor work equipment of the present application sets the ratio of the length of the battery cell to the width of the shell to be greater than or equal to 0.7, so that the space of the shell is more fully utilized and the battery cell layout is more compact. This helps to place multiple battery packs on the outdoor work equipment without occupying a large space of the outdoor work equipment. [Drawings]

[0020] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings:

[0021] Figure 1 is a three-dimensional view of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0022] Figure 2 It is a structural schematic diagram of the cell layout of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0023] Figure 3This is a schematic diagram of the internal structure of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0024] Figure 4 It is a schematic structural diagram of an electrode connecting piece of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0025] Figure 5 This is a schematic structural diagram of an electrode connecting piece of a battery pack for outdoor working equipment according to an embodiment of the present application from another angle;

[0026] Figure 6 is a schematic diagram of the internal structure of a battery pack for outdoor working equipment according to an embodiment of the present application from another angle;

[0027] Figure 7 It is a schematic structural diagram of an electrode connecting piece of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0028] Figure 8 It is a structural schematic diagram of a battery cell structure of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0029] Fig. 9 It is a structural schematic diagram of the positional relationship of a BMS board, positive and negative electrode sheets and conductive parts of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0030] Fig.10 It is a schematic structural diagram of a conductive member of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0031] Fig.11 It is a schematic structural diagram of a positive electrode sheet of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0032] Fig.12 2 is a schematic structural diagram of a second bracket of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0033] Fig.13 is a structural schematic diagram of a second bracket at another angle of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0034] Fig.14 is a structural schematic diagram of a second bracket at another angle of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0035] Fig.15 is a structural schematic diagram of a second bracket at another angle of a battery pack for outdoor working equipment according to an embodiment of the present application;

[0036] Fig.16 It is a structural schematic diagram of a battery pack for outdoor working equipment with a shock absorbing structure according to an embodiment of the present application;

[0037] Fig.17 This is a schematic diagram of the overall structure of outdoor working equipment according to an embodiment of the present application;

[0038] Fig.18 This is a schematic diagram of the overall structure of outdoor working equipment according to another embodiment of the present application;

[0039] Fig.19 This is a schematic diagram of the overall structure of outdoor working equipment according to another embodiment of the present application;

[0040] Fig. 20 It is a schematic diagram of the overall structure of outdoor working equipment according to another embodiment of the present application.

[0041] Meaning of the reference numerals in the figures:

[0042] 100, battery pack; 101, output battery cell group; 102, odd-numbered battery cell group; 103, even-numbered battery cell group; 104, mounting bracket; 1041, first bracket; 1042, second bracket; 105, first mating surface; 106, second mating surface; 107, assembly part; 108, stopper; 109, electrode connecting piece; 1091, recessed structure; 1092, protrusion shape structure; 1093, second connecting part; 110, through hole; 111, BMS board; 112, positive electrode sheet; 1121, first mating part; 1122, second mating part; 1123, inclined surface; 113, battery cell; 1131, end surface; 1132, side wall; 1133, protrusion structure; 114, negative electrode sheet; 115, mounting seat; 116, conductive member; 1161, pin; 1162, fixing hole; 117, collecting member; 1171, first connecting portion; 118, supporting portion; 119, shock absorbing structure; 120, plane; 121, handle; 122, heat dissipation slot; 123, limit portion; 200, main frame; 300, operating assembly; 400, seat; 500, walking assembly; 600, power output assembly. [Specific implementation method]

[0043] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0044] The battery pack for outdoor work equipment is generally formed by connecting multiple single cells in series and parallel, and also adds a battery management system (BMS, Battery Management Systems), etc., which can be directly used as an independent module in other equipment.

[0045] However, the existing battery packs for outdoor work equipment have a relatively traditional cell layout, where generally all the cells are arranged neatly or all the cells are arranged in a staggered manner. Such a configuration sometimes cannot be well adapted to the installation of other components in the battery pack for outdoor work equipment, resulting in insufficient utilization of the overall space inside the battery pack for outdoor work equipment.

[0046] Moreover, the existing battery packs for outdoor work equipment improve the heat dissipation efficiency of the battery cells by staggering the battery cells, that is, the adjacent battery cell groups in different rows are arranged 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 both ends, the positive electrode sheets and the negative electrode sheets are often set to different lengths to adapt to battery cell groups of different heights, so that the output ends of the positive and negative electrode sheets are consistent in height, thereby achieving the connection and setting of the positive and negative electrode sheets with the BMS board at the same height. However, if electrode sheets of different lengths are used for connection, not only the complexity of the production of the positive and negative electrode sheets is increased, but also the assembly cost of the battery pack for outdoor work equipment is indirectly increased.

[0047] Moreover, the battery cell group at the higher end will occupy the space of the battery pack for outdoor work equipment. In order to adapt to the installation of other components, the height of the battery pack for outdoor work equipment will be increased as a whole, making the overall space occupied by the battery pack for outdoor work equipment larger, affecting the compatibility of the battery pack for outdoor work equipment with other equipment (such as outdoor work equipment or power tools).

[0048] See also Figures 1 to 19 The figure shows a battery pack 100 for outdoor working equipment according to an embodiment of the present application, including a shell and a plurality of battery cells 113 arranged in the shell, wherein the plurality of battery cells 113 are configured as follows: a first battery cell group, including two rows of output battery cell groups 101 having the same height on a plane 120, wherein the output battery cell group 101 is configured to be connected to the positive or negative pole of the battery pack 100 for outdoor working equipment to output electrical energy to the outside; a second battery cell group, including odd-numbered battery cell groups 102 and even-numbered battery cell groups 103, wherein the odd-numbered battery cell groups 102 and the even-numbered battery cell groups 103 are arranged alternately on the plane 120; wherein the height of the output battery cell group 101 is different from the height of the odd-numbered battery cell groups 102 and the height of the even-numbered battery cell groups 103.

[0049] By setting the height of the output battery cell group 101 serving as the electric energy output to be different from the height of the odd-numbered battery cell group 102 and the height of the even-numbered battery cell group 103, it is possible to fully utilize the internal space of the battery pack 100 for outdoor working equipment, making the spatial layout of the battery pack 100 for outdoor working equipment more reasonable.

[0050] like Figure 1 and Figure 6 As shown, a mounting bracket 104 is also provided in the shell of the battery pack 100 for outdoor working equipment of the present application, and a plurality of assembly parts 107 are provided in the mounting bracket 104, and the assembly parts 107 are used to assemble the battery cells 113. And the position layout of each assembly part 107 is set according to the layout of the battery cells 113. The mounting bracket 104 includes a first bracket 1041 and a second bracket 1042 that are combined together, and the first bracket 1041 and the second bracket 1042 are both provided with assembly parts 107, and the assembly parts 107 on the first bracket 1041 and the second bracket 1042 are arranged correspondingly, and the two ends of the battery cell 113 are respectively inserted into the assembly parts 107 on the first bracket 1041 and the second bracket 1042 to realize the mounting bracket 104. After the first bracket 1041 and the second bracket 1042 are combined and formed, they are roughly square structures.

[0051] like Figure 2 As shown, in a specific embodiment, the height h2 of the output cell group 101 is located between the height h1 of the odd-numbered cell group 102 and the height h3 of the even-numbered cell group 103. By setting the height h2 of the output cell group 101 between the height h1 of the odd-numbered cell group 102 and the height h3 of the even-numbered cell group 103, the output cell group 101 does not occupy additional space in the height direction, but is only arranged between the height h1 of the odd-numbered cell group 102 and the height h3 of the even-numbered cell group 103, thereby saving the space occupied by the battery pack 100 for outdoor working equipment due to the layout.

[0052] Furthermore, the two rows of output cell groups are respectively arranged at the two ends of the arrangement direction of the second cell group. When the height h2 of the two rows of output cell groups 101 is between the height h1 of the odd-numbered cell groups 102 and the height h3 of the even-numbered cell groups 103, the two rows of output cell groups 101 are located at the two ends of the entire cell group layout, so that the cell groups are enclosed in a square structure, and sufficient reserved space is formed at the four corners of the square structure. This reserved space area can be used to reinforce the structure of the mounting bracket 104 at the four corners to increase the strength of the mounting bracket 104, thereby increasing the drop resistance and impact resistance of the battery pack 100 for outdoor working equipment.

[0053] Furthermore, at least one of the two rows of output cell groups 101 is arranged between the second cell groups. Such an arrangement is beneficial for the output cell groups 101 to be closer in layout.

[0054] In a specific embodiment, the lengths of the output cell group 101, the odd-numbered cell group 102, and the even-numbered cell group 103 are the same, so that the cells 113 are arranged more regularly, which is conducive to making the internal space layout of the housing more compact.

[0055] See also Figure 2 In a specific embodiment, each of the first battery cell group and the second battery cell group includes an even number of battery cells 113, and the even number of battery cells 113 are connected in parallel in pairs. Preferably, the battery pack 100 for outdoor work equipment in the present application includes 32 battery cells 113, which are respectively arranged into 8 rows of battery cell groups, and each row of battery cell groups includes four battery cells 113, of which two rows are output battery cell groups 101, and the rest are 3 rows of odd-numbered battery cell groups 102 and 3 rows of even-numbered battery cell groups 103, and the two adjacent battery cells 113 in each row are connected in parallel to supply power to the outside. The 32 battery cells 113 can be arranged into 16 groups of battery cells 113 connected in parallel in pairs, and then the 16 groups of battery cells 113 are connected in series to output electrical energy to the outside.

[0056] In the present application, the length of the shell is less than or equal to 372 mm, preferably, the length of the shell is 370 mm. The width of the shell is less than or equal to 170 mm, preferably, the width of the shell is 160 mm, and the height of the shell is less than or equal to 239 mm, preferably, the height of the shell is 230 mm. The battery cell 113 is preferably a cylindrical battery cell 113, whose diameter is generally greater than 38 mm, preferably 40 mm, and the length of the battery cell 113 is generally greater than or equal to 130 mm, preferably 130 mm, and can also be 135 mm.

[0057] In a specific embodiment, the ratio of the length of the battery cell 113 to the width of the shell is greater than or equal to 0.7. Preferably, the ratio of the length of the battery cell 113 to the width of the shell is 0.8. During assembly, the axial direction of the battery cell 113 is parallel to the width direction of the shell. This ratio setting enables the battery cell 113 to fully utilize the size in the width direction of the shell. When the same battery cell 113 is used, the size of the battery pack 100 is smaller, which is conducive to the use of multiple battery packs 100 on outdoor work equipment.

[0058] Furthermore, the ratio of the width of the mounting bracket 104 to the width of the shell is not less than 0.9. Preferably, the ratio of the width of the mounting bracket 104 to the width of the shell is 0.9. The assembly of the mounting bracket 104 and the shell is also relatively compact, saving space in the shell.

[0059] The battery cell 113 of the present application, when charging the battery cell 113, its AC internal resistance during charging is less than or equal to 5mΩ, preferably, the AC internal resistance of the battery cell 113 during charging is 3mΩ or 4mΩ. When the battery cell 113 is discharged, the DC internal resistance of the battery cell 113 during discharge is less than or equal to 8mΩ, preferably, the DC internal resistance of the battery cell 113 during discharge is 6mΩ. The charging limit voltage of the battery cell 113 is less than or equal to 5V, preferably, the charging limit voltage of the battery cell 113 is 3.8v or 4v.

[0060] Further, the charging cut-off current of the battery cell 113 is less than or equal to 1200mAh, preferably, the charging cut-off current of the battery cell 113 is 800mAh or 1000mAh. The standard discharge current of the battery cell 113 is greater than or equal to 10000mAh, preferably, the standard discharge current of the battery cell 113 is 15000mAh or 20000mAh.

[0061] The nominal voltage of a single battery cell 113 is greater than or equal to 3.2 V, preferably the nominal voltage is 3.2 V. The nominal capacity of the battery cell 113 is greater than or equal to 15 Ah, preferably the nominal capacity is 20 Ah.

[0062] The weight of the battery pack 100 for outdoor working equipment assembled from the above-mentioned battery cells is greater than or equal to 11.4Kg, and the preferred weight is 16Kg. The nominal energy of the battery pack 100 for outdoor working equipment is greater than or equal to 1.54Kwh, and the preferred nominal energy is 1.6Kwh. The nominal voltage of the battery pack 100 for outdoor working equipment is greater than or equal to 51.2v, and the preferred nominal voltage is 58v.

[0063] In a specific embodiment, electrical connection terminals are provided at both ends of the battery pack 100, and the electrical connection terminals are symmetrically arranged on the shell of the battery pack 100, so that the battery pack 100 can output electrical energy to the outside through the two electrical connection terminals. Compared with the method of outputting electrical energy to the outside with only one electrical connection terminal, the two electrical connection terminals of the present application can reduce the heat generated when transmitting electrical energy.

[0064] Furthermore, the distance between the electrical connection terminal and the bottom surface of the battery pack 100 is less than 30 mm, or the distance between the electrical connection terminal and the bottom surface of the battery pack 100 is less than 20 mm.

[0065] In a specific embodiment, the ratio of the cross-sectional area of ​​a single battery cell 113 along its radial direction to the projected area of ​​the battery pack 100 along its width direction is greater than or equal to 0.01. Compared with the battery pack 100 used in traditional outdoor work equipment, especially the battery pack 100 used in a riding lawn mower, the ratio of the cross-sectional area of ​​the battery cell 113 along the radial direction to the projected area along its width direction in the present application is larger, so that the space in the shell is fully used to assemble the battery cell 113, so that when the same battery cell 113 is installed, the battery pack 100 of the present application is smaller in size and occupies less space.

[0066] In a specific embodiment, the upper and lower parts of the shell of the battery pack 100 are both provided with heat dissipation slots 122, and a plurality of battery cells form a battery cell module, and the length of the battery cell module along its width direction is shorter than its length along its length direction. Such a configuration is conducive to sufficient heat dissipation of the battery cell 113 through the heat dissipation slots 122.

[0067] like Fig. 9 As shown, in a specific embodiment, one of the two rows of output battery 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 heights of the positive electrode sheet 112 and the negative electrode sheet 114 are the same. Since the positive electrode sheet 112 and the negative electrode sheet 114 also need to be connected to other components, the other components connected to 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 spatial layout of the battery pack 100 for outdoor working equipment in the height direction is more compact.

[0068] In a specific embodiment, the distance between the positive electrode sheet 112 and the negative electrode sheet 114 is greater than or equal to 200 mm. Such a configuration can effectively prevent the positive electrode sheet 112 and the negative electrode sheet 114 from short-circuiting 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.

[0069] like Figure 6 and Figure 7As shown, in a specific embodiment, a collection piece 117 for collecting information of a plurality of battery cells 113 is provided on the mounting bracket 104, a first connection portion 1171 is provided on the collection piece 117, a plurality of electrode connecting pieces 109 are connected between the battery cells 113, a second connection portion 1093 is provided on the electrode connecting piece 109, and the first connection portion 1171 is used to connect with the second connection portion 1093. Further, the first connection portion 1171 is an opening on the collection piece 117, the second connection portion 1093 is a connector that can be matched with the opening, the connector is a convex block that is plugged and matched with the opening, and the convex block and the electrode connecting piece 109 are an integrally formed structure. In the specific assembly process, after the connector is connected to the opening, the two are fixedly connected by welding.

[0070] like Figure 3 and Figure 6 As shown, further, both ends of the multiple battery cells 113 are connected with electrode connecting sheets 109, and along the axial direction parallel to the battery cell 113, the ratio of the projected area of ​​the collection piece 117 to the total projected area of ​​all electrode connecting sheets 109 at one end of the battery cell 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 sheet 109 covered by the collection piece 117 smaller, which is beneficial to the heat dissipation of the battery cell 113, thereby helping the battery to achieve an ideal charge and discharge state. Preferably, the ratio of the projected area of ​​the collection piece 117 to the total projected area of ​​all electrode connecting sheets 109 at one end of the battery cell 113 is 1 / 3, 2 / 5 or 1 / 2.

[0071] like Figure 4 , Figure 5 and Figure 7 As shown, the thickness of the electrode connecting sheet 109 is greater than 0.5 mm and less than or equal to 1.8 mm, which is conducive to improving the firmness of the connection between the electrode connecting sheet 109 and the positive or negative electrode of the battery cell 113 to prevent welding through the electrode connecting sheet 109. Preferably, the thickness of the electrode connecting sheet 109 is 0.6 mm, 1 mm, 1.5 mm or 1.8 mm.

[0072] In a specific embodiment, the total number of the positive electrode sheets 112, the negative electrode sheets 114 and the electrode connecting sheets 109 of the present application is 17, and there are two collecting pieces 117, which are distributed at both ends of the battery cell 113. Therefore, there are at least 17 collecting points on the two collecting pieces 117, and each collecting point collects different positive electrode sheets 112, negative electrode sheets 114 and electrode connecting sheets 109.

[0073] like Figure 4 , Figure 5 and Figure 8As shown, further, the area where the electrode connecting sheet 109 is connected to the battery cell 113 is provided with a recessed structure 1091, and the end of the battery cell 113 is provided with a protruding structure 1133. When the electrode connecting sheet 109 and the battery cell 113 are assembled, the protruding structure 1133 of the battery cell 113 is located in the recessed structure 1091. This is conducive to shortening the distance of the entire battery pack 100 for outdoor working equipment along the axis direction of the battery cell 113, so that the battery pack 100 for outdoor working equipment is compact. Specifically, both ends of the battery cell 113 are convex structures.

[0074] Of course, during the production and processing of the electrode connecting sheet 109, the recessed structure 1091 of the electrode connecting sheet 109 is formed by stamping, so that the opposite side of the recessed structure 1091 of the electrode connecting sheet 109 is the protruding shape structure 1092, and the protruding structure 1133 of the battery cell 113 can also be connected to the protruding shape structure 1092 of the electrode connecting sheet 109, so that there will be sufficient heat dissipation gap between the end of the battery cell 113 and the electrode connecting sheet 109, which is beneficial to the heat dissipation of the battery cell 113.

[0075] like Figure 4 , Figure 5 and Figure 7 As shown, further, the electrode connecting piece 109 can be a diamond structure or a long strip structure. In a specific embodiment, during assembly, one end of the battery cell group can use a diamond structure electrode connecting piece 109, and the other end can use a long strip structure electrode connecting piece 109. Of course, both ends of the battery cell group can use the same structure of electrode connecting pieces 109, for example, both ends of the battery cell group use diamond structure electrode connecting pieces 109 (such as Figure 4 or Figure 5 ) or both ends of the battery pack use a long strip structure electrode connecting sheet 109 (such as Figure 7 ).

[0076] Please also see Fig. 9 and Fig.10 In a specific embodiment, a conductive member 116 is connected between the BMS board 111 and the positive electrode sheet 112 and the negative electrode sheet 114, respectively. One side of a conductive member 116 is used to be fitted with the positive electrode sheet 112 or the negative electrode sheet 114, and the other side is used to be fitted with the BMS board 111. The conductive member 116 is arranged between the positive electrode sheet 112 or the negative electrode sheet 114 and the BMS board 111, so that the electrical contact between the two is more stable.

[0077] like Fig.10Furthermore, a plurality of pins 1161 are provided at the edge of the conductive member 116, and a socket matched with the pins 1161 is provided on the BMS board 111. The conductive member 116 is a sheet-like structure. Preferably, the conductive member 116 is a square sheet-like structure, and the pins 1161 are provided around the square sheet-like structure, and the pins 1161 are provided on the same side of the conductive member 116. During installation, the pins 1161 are inserted into the socket, and then the conductive member 116 is welded to the BMS board 111 by welding, which increases the stability and firmness of the connection between the two. When assembling, the positive electrode sheet 112 or the negative electrode sheet 114 is located at the bottom, the conductive member 116 is in the middle, and the BMS board 111 is at the top. Then the positive electrode sheet 112 or the negative electrode sheet 114 is connected to the BMS board 111 by screwing. The sheet-like conductive member 116 is conducive to its full fit and contact with the BMS board 111 and the positive electrode sheet 112 or the negative electrode sheet 114, maintaining a 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 methods, such as snap connection, bonding, tin melting welding, etc., as long as the two can be normally connected.

[0078] In a specific embodiment, the acquisition component 117 is connected to the BMS board 111 through a line bus, so that the acquisition component 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 acquisition component 117 and the BMS board 111 can also be other connection methods besides the line bus.

[0079] In a specific embodiment, the extension direction of the BMS board 111 is arranged parallel to the axial direction of the battery cell 113, so that the layout between the BMS board 111 and the battery cell 113 is more compact and space is saved.

[0080] Please also see Fig.11 In a specific embodiment, the outer surface of the mounting bracket 104 includes a first mating surface 105, the mounting bracket 104 is provided with a mounting seat 115, the mounting seat 115 includes a second mating surface 106, the positive electrode sheet 112 and the negative electrode sheet 114 are respectively provided with a first mating portion 1121 and a second mating portion 1122, the first mating portion 1121 is used to match with the first mating surface 105, and the second mating portion 1122 is used to match with the second mating surface 106. The provision of multiple mating portions increases the stability of the installation of the positive electrode sheet 112 and the negative electrode sheet 114.

[0081] In a specific embodiment, a groove is formed on one surface of the mounting seat 115 , and the groove is used to mount the BMS board 111 . The BMS board 111 is fixed in the groove of the mounting seat 115 by screwing.

[0082] Further, the first mating portion 1121 and the second mating portion 1122 of the positive electrode sheet 112 are both extended toward the same side of the positive electrode sheet 112, and the first mating portion 1121 and the second mating portion 1122 of the negative electrode sheet 114 are both extended toward the same side of the negative electrode sheet 114. Specifically, the first mating portion 1121 and the second mating portion 1122 are part of the positive electrode sheet 112, and after the first mating portion 1121 is bent toward one side of the positive electrode sheet 112, it is bent again to form the second mating portion 1122. Similarly, after the first mating portion 1121 of the negative electrode sheet 114 is bent toward one side of the positive electrode sheet 112, it is bent again to form the second mating portion 1122. In specific operation, the first mating portion 1121 and the second mating portion 1122 are both extended toward one side of the mounting bracket 104, so as to achieve a stable connection with the upper BMS board 111.

[0083] Furthermore, an inclined surface 1123 is formed at the connection between the first matching portion 1121 and the second matching portion 1122 of the positive electrode sheet 112 or the negative electrode sheet 114, which cooperates with an inclined surface of the mounting seat 115 to increase the fit between the positive electrode sheet 112 or the negative electrode sheet 114 and the mounting seat 115, thereby increasing the stability of the installation of the positive electrode sheet 112 or the negative electrode sheet 114.

[0084] Please also see Figure 3 In a specific embodiment, a limiting portion 123 is further provided on the mounting seat 115, and the limiting portion 123 is used to cooperate with the side limiting portion 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 match 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, thereby improving the assembly efficiency.

[0085] In a specific embodiment, in order to reduce the shaking of the battery cell 113 in the mounting bracket 104, a plurality of assembly parts 107 suitable for assembling the battery cell 113 are provided on the mounting bracket 104, and a limiting member 108 for limiting the movement of the battery cell 113 is provided in the assembly part 107. Usually, the assembly part 107 is a mounting groove, and during assembly, the battery cell 113 is assembled in the mounting groove. The limiting member 108 is provided to limit the shaking of the battery cell 113, usually to limit the shaking of the battery cell 113 in its axial and radial directions, which can effectively prevent the outer wall of the battery cell 113 from being damaged due to the large shaking of the battery cell 113, so as to prevent leakage.

[0086] Furthermore, the stopper 108 is protruded from the inner wall of the assembly part 107 to the inner cavity of the assembly part 107, and the surface of the stopper 108 that cooperates with the battery cell 113 is a guide surface. When the battery cell 113 is assembled in the assembly part 107, the guide surface is conducive to guiding the movement of the battery cell 113 into the assembly part 107, and the battery cell 113 is limited in the assembly part 107 through the interference fit between the stopper 108 and the outer wall of the battery cell 113.

[0087] Furthermore, 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 limiter 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. With such a configuration, while ensuring that the limiter 108 plays a limiting role on the battery cell 113, the limiter 108 also occupies a smaller space in the radial direction of the assembly portion 107. Therefore, when planning the assembly portion 107, the larger size of the limiter 108 will not cause the overall size of the assembly portion 107 to occupy a larger space, which helps to design the battery pack 100 for outdoor work equipment with compactness. Preferably, the ratio of the length of the limiter 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.

[0088] like Fig.12 , Fig.14 and Fig.15 In a specific embodiment, a support portion 118 is provided at the end of the assembly portion 107, and along the axis direction of the battery cell 113, the ratio of the projection area of ​​the support portion 118 to the projection area of ​​a single end face 1131 of the battery cell 113 is greater than or equal to 0.002 and less than or equal to 0.003. Such a configuration is also to ensure that the limiting member 108 can limit the battery cell 113 while making the limiting member 108 occupy a smaller space.

[0089] The support portion 118 is used to limit the position of the battery cell 113 during assembly, so that the battery cell 113 remains in the assembly portion 107 .

[0090] Please also see Fig.13, further, in the axial direction of the battery cell 113, the ratio of the projection area of ​​the support portion 118 to the projection area of ​​the end face 1131 of a single 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 support portion 118 to the projection area of ​​the end face 1131 of a single battery cell 113 is 0.0025, 0.0026 or 0.0028. Such a configuration makes the area of ​​the support portion 118 smaller, and thus makes the diameter of the through hole 110 at the end of the assembly portion 107 larger, which is beneficial to the heat dissipation of the battery cell 113 and also beneficial to the battery cell 113 being able to leak a larger portion through the through hole 110 so that the remaining electrode connecting sheets 109 or the positive connecting sheets or the negative connecting sheets can be connected.

[0091] In a specific embodiment, a limiting member 108 is provided at the middle part and at either end of the assembly portion 107. Arranging a plurality of limiting members 108 in the axial direction of the battery cell 113 further helps to limit the shaking of the battery cell 113 in the assembly portion 107 and improve the stability of the battery cell 113.

[0092] Specifically, the limiting member 108 is a protrusion formed radially inwardly by the inner wall of the assembly portion 107 .

[0093] In a specific embodiment, a plurality of limit members 108 are provided. Preferably, three limit members 108 are provided on the inner wall of one assembly portion 107 . The three limit members 108 may be on the same horizontal plane 120 along the axial direction or on different horizontal planes 120 .

[0094] like Fig.16 In a specific embodiment, a shock absorbing structure 119 is provided on the mounting bracket 104. Further, the shock absorbing structure 119 is a shock absorbing foam provided on the outer periphery of the mounting bracket 104. This is beneficial to buffer the shaking of the mounting bracket 104 and the battery cell 113 in the housing, thereby reducing the possibility of damage to the battery cell 113.

[0095] like Figure 1 Furthermore, a heat dissipation groove 122 is provided on the shell, and the heat dissipation groove 122 is provided on two opposite surfaces of the shell to form convection, specifically, it is provided in the upper and lower directions of the shell. The setting of the heat dissipation groove 122 is conducive to dissipating the heat generated when the battery cell 113 is charged or discharged.

[0096] like Figure 1 A handle 121 is provided on the upper part of the shell, and the handle 121 is used to facilitate the transportation of the battery pack 100 for outdoor working equipment, so that the battery pack 100 for outdoor working equipment can be assembled with other equipment to charge or discharge the battery pack 100 for outdoor working equipment.

[0097] In a specific embodiment, the ratio of the area of ​​the side wall 1132 of the battery cell 113 located in the assembly portion 107 to the area of ​​the side wall 1132 of the entire battery cell 113 is greater than or equal to 1 / 3 and less than or equal to 1 / 2. Such a configuration ensures that the area enclosed in the assembly portion 107 does not exceed half of the battery side wall 1132, which is beneficial to the heat dissipation of the battery cell 113 and alleviates the occurrence of spontaneous combustion. Preferably, the ratio of the area of ​​the side wall 1132 of the battery cell 113 located in the assembly portion 107 to the area of ​​the side wall 1132 of the entire battery cell 113 is 1 / 3, 2 / 5 or 1 / 2.

[0098] like Fig.17 The present application also provides an outdoor work equipment, which includes the above-mentioned battery pack 100 for outdoor work equipment, and the battery pack 100 for outdoor work equipment includes: a shell and a plurality of battery cells 113 arranged in the shell; the plurality of battery cells 113 are configured as: a first battery cell group, including two rows of output battery cell groups 101 with the same height on a plane 120, and the output battery cell group 101 is configured to be connected to the positive or negative electrode of the battery pack 100 for outdoor work equipment to output electrical energy to the outside; a second battery cell group, including an odd-numbered battery cell group 102 and an even-numbered battery cell group 103, and the odd-numbered battery cell group 102 and the even-numbered battery cell group 103 are arranged alternately on the plane 120; wherein the height of the output battery cell group 101 is different from the height of the odd-numbered battery cell group 102 and the height of the even-numbered battery cell group 103.

[0099] The outdoor working equipment includes a main frame 200, a seat 400, a power output assembly 600, a travel assembly 500, an operating assembly 300 and a power supply device.

[0100] Furthermore, the main frame 200 extends along a first straight line direction parallel to its front-rear direction on the working surface. Among them, the seat 400 is installed on the main frame 200 for the user to sit on. The main frame 200 is also used to install the power output assembly 600, the travel assembly 500, the operating assembly 300 and the power supply device. The power supply device is used to provide an energy source for the power-consuming units of the entire outdoor working equipment, such as enabling the cutting assembly to perform cutting operations, and enabling the travel assembly 500 to support the main frame 200 and related components on the main frame 200 to travel and power consumption of other power-consuming units. The power supply device includes a battery compartment and a battery pack. The power supply device is specifically the above-mentioned battery pack 100 for outdoor working equipment.

[0101] The power output assembly 600 is used as a workpiece to realize the function of the tool. In this embodiment, the outdoor working equipment is a riding lawn mower, and the power output assembly 600 is specifically a cutting assembly, which is used to output power to realize the mowing function of the riding lawn mower. The cutting assembly is set to 2 groups or 3 groups. The cutting assembly is arranged below the main frame 200. In one embodiment, the cutting assembly includes: a blade, a mowing element and a cutting motor. The mowing element is used to cut vegetation such as grass when rotating at a high speed. For example, the mowing element is a blade for cutting vegetation on a lawn. The blade 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 2, and correspondingly, the number of cutting motors is also 2. The two cutting motors independently drive the two mowing elements. In some embodiments, the number of mowing elements can be 3, and correspondingly, the number of cutting motors is also 3. The three cutting motors independently drive the three mowing elements.

[0102] Of course, the power output assembly 600 can also be removed from the outdoor work equipment. In some embodiments, it can be understood that the power output assembly 600 can be replaced with other components. Therefore, the outdoor work equipment can not only cut vegetation, but also replace the cutting assembly with functional components such as snow shoveling, snow sweeping, snow blowing, and flushing. Technical personnel in this field should be able to adaptively replace various functional components without creative work, and all of the above should be included in the protection scope of this embodiment.

[0103] The walking assembly 500 includes a walking wheel arranged on the main frame 200 and a walking motor for driving the walking wheel. The walking wheels are arranged on both sides of the main frame 200 so that the center of gravity of the outdoor working equipment is kept in the main frame 200 to reduce the probability of the outdoor working equipment rolling over when walking. In one embodiment, the number of walking wheels is set to 4, including 2 front walking wheels and 2 rear walking wheels respectively. The front walking wheel can be a universal wheel, the walking motor is connected to the rear walking wheel, and drives the rear walking wheel to rotate, and the 2 rear walking wheels are matched with the walking motor, and the speed of the 2 walking motors can be the same or different. When the user drives the outdoor working equipment straight, the speed of the two walking motors is roughly the same; when the user drives the outdoor working equipment to turn, the speed of the two walking motors is different, and the outdoor working equipment turns to the side with a low speed of the walking motor. In some embodiments, the diameter of the front walking wheel is smaller than the diameter of the rear walking wheel. Of course, the number of walking wheels can also be set to 3 or 5.

[0104] In one embodiment, the travel wheels may be configured as travel devices of other structures that support the travel of outdoor working equipment.

[0105] The operating assembly 300 includes a left operating lever and a right operating lever arranged on the left and right sides of the outdoor working equipment, and the user controls the outdoor working equipment to move forward, backward or turn by operating the left operating lever and the right operating lever. The operating assembly 300 can also be a steering wheel capable of controlling the outdoor working equipment. The present application also includes a brake assembly, which is arranged on the upper surface in front of the main frame 200, for the user to step on to control the operating state of the outdoor working equipment.

[0106] The power supply device is arranged at the rear of the outdoor working equipment. The power supply device includes a battery pack, a BMS control board for controlling the output and input of the battery pack, and a battery compartment for installing the battery pack. The battery pack is specifically the above-mentioned battery pack 100 for outdoor working equipment. The battery pack is electrically connected to the electrical connection terminals on the battery compartment through the electrical connection terminals thereon to power the outdoor working equipment. Preferably, the battery compartment can be configured to accommodate battery packs of different capacities to increase the compatibility of the outdoor working equipment with different battery packs. Among them, the battery pack 100 can also be disassembled to power other power tools, which increases the versatility of the battery pack. Compared with the traditional 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 plans. Preferably, the battery pack preferably uses lithium iron phosphate batteries or ternary lithium batteries.

[0107] like Fig.18 , Fig.19 and Fig. 20 As shown, a schematic diagram of the structure of outdoor working equipment in another embodiment is shown.

[0108] The outdoor operation equipment may be implemented as an agricultural operation vehicle, and specifically may be exemplified as a UTV vehicle, such as Fig.18 and Fig.19 or tractor, such as Fig. 20 The battery compartment can be arranged at the front of the body of the UTV vehicle or tractor, the top of the battery compartment is provided with an openable battery compartment cover, and the battery pack is arranged inside the battery compartment. Of course, the battery pack 100 can also be arranged under the seat of the UTV vehicle or tractor.

[0109] The connection between the battery pack 100 and the UTV vehicle or tractor is detachable so as to facilitate replacement of the battery pack 100 .

[0110] In this embodiment, the operating component 300 is a steering wheel 300 on a UTV vehicle or a tractor. The steering wheel 300 can be used to control the steering of the UTV vehicle or the tractor. A display screen can be positioned and arranged on the steering wheel 300.

[0111] Specifically, the display screen can display the power level of the battery pack 100 , which helps the user to determine the working area of ​​the outdoor working equipment according to the remaining power so as to replace the battery pack 100 .

[0112] The display screen can also display the information of the battery cell 113 collected in real time by the electrode connecting sheet 109 or the positive electrode sheet 112 or the negative electrode sheet 114, so that when a fault occurs, the user or maintenance personnel can accurately obtain the location of the faulty battery cell 113 and perform timely repair or replacement of the battery cell 113.

[0113] Of course, the display screen can also display the operating temperature of the battery pack 100. Since too high or too low temperature will affect the actual battery life, and too high temperature will cause the battery pack 100 to self-ignite and cause dangerous accidents, the display screen can be used to timely understand the operating temperature of the battery pack 100 and take corresponding measures, such as shutting down.

[0114] The steering wheel 300 is located in front of the seat on the frame, and the upper surface can be tilted at a certain angle toward the seat, so that the user can operate the steering wheel 300 and can be tilted toward the user's face, so that the user can view the display screen. The steering wheel 300 can also be set to an angle-adjustable structure to meet the needs of different users for the tilt angle of the display screen. The steering wheel 300 can also be set to be adjustable in height, so that when users of different heights use it, they can adjust it according to their own height requirements. The height of the steering wheel can be adjusted manually or electrically.

[0115] For example, Fig.18 and Fig.19 All are UTV vehicles, among which: Fig.18 The one on display is a single-row seat UTV vehicle. Fig.19 The UTV vehicle on display is a double-row seat vehicle. The rear of the UTV vehicle with a single row of seats and the UTV vehicle with a double row of seats can be provided with an accessory mechanism, such as a load bucket, etc.

[0116] For example, Fig. 20 The figure shows a tractor, the rear of which can be equipped with a trailer.

[0117] The present application is not limited to the above specific implementations. A person skilled in the art can easily understand that there are many alternatives to the battery pack for outdoor working equipment of the present application without departing from the principle and scope of the present application. The scope of protection of the present application shall be subject to the content of the claims.

Claims

1. A battery pack for outdoor working equipment, the outdoor working equipment comprising: A power output assembly configured to output power to perform outdoor work; A walking assembly, configured to support the outdoor working equipment in walking; Characterized in that the battery pack comprises: A housing, detachably mounted on the outdoor working equipment; A plurality of battery cells are arranged in the housing, the diameter of the battery is greater than or equal to 40 mm, and the length of the battery cells is greater than or equal to 135 mm; Wherein, the ratio of the length of the battery core to the width of the shell is greater than or equal to 0.

7.

2. The battery pack for outdoor working equipment according to claim 1, characterized in that: A mounting bracket for mounting the battery cell is also provided in the shell, and the ratio of the width of the mounting bracket to the width of the shell is not less than 0.

9.

3. The battery pack for outdoor working equipment according to claim 2, characterized in that: Electrode connecting sheets are arranged at both ends of the battery cell, collecting components for collecting signals from the electrode connecting sheets are arranged on both sides of the mounting bracket, and a BMS board connected to the electrical signals of the collecting components is arranged on the upper part of the mounting bracket.

4. The battery pack for outdoor working equipment according to claim 1, characterized in that: The AC internal resistance of the battery cell during charging is less than or equal to 5 mΩ, and the DC internal resistance of the battery cell during discharging is less than or equal to 8 mΩ.

5. The battery pack for outdoor working equipment according to claim 1, characterized in that: The charging limit voltage of the battery cell is less than or equal to 5V.

6. The battery pack for outdoor working equipment according to claim 1, characterized in that: The charging cut-off current of the battery cell is less than or equal to 1200 mAh.

7. The battery pack for outdoor working equipment according to claim 1, characterized in that: The standard discharge current of the battery cell is greater than or equal to 10000 mAh.

8. The battery pack for outdoor working equipment according to claim 1, characterized in 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 170 mm, and the height of the shell is less than or equal to 239 mm.

9. The battery pack for outdoor working equipment according to claim 1, characterized in that: The battery pack for outdoor working equipment includes at least two electrical connection terminals, and the two electrical connection terminals are symmetrically arranged.

10. The battery pack for outdoor working equipment according to claim 9, characterized in that: The distance between the electrical connection terminal and the bottom surface of the battery pack is less than 30 mm.

11. The battery pack for outdoor working equipment according to claim 1, characterized in that: 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.

12. The battery pack for outdoor working equipment according to claim 1, characterized in that: The upper and lower parts of the shell of the battery pack are both provided with heat dissipation grooves, and a plurality of the battery cells form a battery cell module, and the length of the battery cell module along the width direction is shorter than the length along the length direction.

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