Battery pack and outdoor operation equipment

Abstract

The utility model discloses a battery pack and outdoor operation equipment, the battery pack comprises a shell and a plurality of battery cells arranged in the shell, the plurality of battery cells are configured to be a plurality of rows of battery cell groups, at least two rows of battery cell groups in the plurality of rows of battery cell groups have the same height on the same plane, and the battery cell groups with the same height are configured to be output battery cell groups which are connected with the positive electrode or the negative electrode of the battery pack so as to output electric energy to the outside. According to the battery pack, the internal space of the battery pack can be fully utilized, so that the space layout of the battery pack is more reasonable.

Description

[Technical Field]

[0001] This application relates to the technical field of battery packs, and particularly to a battery pack and an outdoor working device. [Background Art]

[0002] Generally, a battery pack is formed by connecting multiple single cells in series or parallel, and a battery management system (BMS) is also added. It can be directly used as an independent module in other devices.

[0003] However, in the existing battery packs, the layout of the battery cells is relatively traditional, usually with all the cells arranged neatly or staggered. Such a setting sometimes cannot well adapt to the installation of other components, resulting in insufficient utilization of the overall space inside the battery pack.

[0004] In view of this, it is necessary to provide an improved battery pack to overcome the defects of the prior art. [Utility Model Content]

[0005] Aiming at the deficiencies of the prior art, the purpose of this application is to provide a battery pack with an optimized structural layout.

[0006] The technical solution adopted by this application to solve the problems of the prior art is: a battery pack, including a housing and a plurality of battery cells arranged in the housing. The plurality of battery cells are configured as multiple rows of battery cell groups, and at least two of the multiple rows of battery cell groups have the same height on a plane. Among them, 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 electrical energy.

[0007] A further improvement is: the multiple rows of battery cell groups further include odd - numbered row battery cell groups and even - numbered row battery cell groups, and the odd - numbered row battery cell groups and the even - numbered row battery cell groups are arranged alternately on the plane.

[0008] A further improvement is: the height of the output battery cell groups is between the height of the odd - numbered row battery cell groups and the height of the even - numbered row battery cell groups.

[0009] A further improvement is: two rows of the output battery cell groups are respectively arranged at both ends in the arrangement direction of the odd - numbered row battery cell groups and the even - numbered row battery cell groups.

[0010] A further improvement is: at least one row of the two rows of the output battery cell groups is arranged between the odd - numbered row battery cell groups and the even - numbered row battery cell groups.

[0011] A further improvement is: the output battery cell groups, the odd - numbered row battery cell groups, and the even - numbered row battery cell groups have the same length.

[0012] A further improvement solution is as follows: One row of the two rows of the output battery cell groups is used to connect the positive electrode sheet, and the other row is used to connect the negative electrode sheet, and the positive electrode sheet and the negative electrode sheet have the same height.

[0013] A further improvement solution is as follows: It further includes a mounting bracket disposed in the housing, a plurality of the battery cells are disposed in the mounting bracket, a collecting member for collecting information of the plurality of the battery cells is disposed on the mounting bracket, a first connecting portion is disposed on the collecting member, a plurality of electrode connecting sheets are connected between the battery cells, a second connecting portion is disposed on the electrode connecting sheet, and the first connecting portion is used to connect with the second connecting portion.

[0014] A further improvement solution is as follows: A BMS board connected to the collecting member is further disposed in the housing, conductive members are respectively connected between the BMS board and the positive electrode sheet and the negative electrode sheet, and both sides of the conductive member are respectively attached to the positive electrode sheet and the negative electrode sheet.

[0015] The present application further provides an outdoor working device, including:

[0016] A power output assembly configured to output power to perform outdoor work;

[0017] A traveling assembly configured to support the outdoor working device to travel; and,

[0018] The battery pack as described above, and the battery pack is configured to supply electric energy to the outdoor working device.

[0019] The present application further provides an outdoor working device, including: a power output assembly configured to output power to perform outdoor work; a traveling assembly configured to support the outdoor working device to travel; and, the battery pack as described above, and the battery pack is configured to supply electric energy to the outdoor working device.

[0020] Compared with the prior art, the present application has the following beneficial effects:

[0021] In the battery pack of the present application, by arranging two rows of battery cell groups respectively used for positive and negative outputs at the same height to match the positive electrode sheet and the negative electrode sheet of the same length and supply power externally, such an arrangement is beneficial to reducing the production cost of the positive electrode sheet and the negative electrode sheet, and simplifies the assembly process of the positive electrode sheet and the negative electrode sheet and the battery cell group. [Description of the Drawings]

[0022] The following further describes in detail the specific embodiments of the present application with reference to the drawings:

[0023] Figure 1 It is a perspective view of the battery pack according to an embodiment of the present application;

[0024] Figure 2 It is a schematic structural diagram of the cell layout of a battery pack according to an embodiment of the present application;

[0025] Figure 3 It is a schematic internal structure diagram of a battery pack according to an embodiment of the present application;

[0026] Figure 4 It is a schematic structural diagram of the electrode connecting piece of a battery pack according to an embodiment of the present application;

[0027] Figure 5 It is a schematic structural diagram of the electrode connecting piece of a battery pack from another angle according to an embodiment of the present application;

[0028] Figure 6 It is a schematic internal structure diagram of a battery pack from another angle according to an embodiment of the present application;

[0029] Figure 7 It is a schematic structural diagram of the electrode connecting piece of a battery pack according to an embodiment of the present application;

[0030] Figure 8 It is a schematic structural diagram of the cell structure of a battery pack according to an embodiment of the present application;

[0031] Figure 9 It is a schematic structural diagram of the positional relationship among the BMS board, the positive and negative electrode plates, and the conductive member of a battery pack according to an embodiment of the present application;

[0032] Figure 10 It is a schematic structural diagram of the conductive member of a battery pack according to an embodiment of the present application;

[0033] Figure 11 It is a schematic structural diagram of the positive electrode plate of a battery pack according to an embodiment of the present application;

[0034] Figure 12 It is a schematic structural diagram of the second bracket of a battery pack according to an embodiment of the present application;

[0035] Figure 13 It is a schematic structural diagram of the second bracket of a battery pack from another angle according to an embodiment of the present application;

[0036] Figure 14 It is a schematic structural diagram of the second bracket of a battery pack from another angle according to an embodiment of the present application;

[0037] Figure 15 It is a schematic structural diagram of the second bracket of a battery pack from another angle according to an embodiment of the present application;

[0038] Figure 16 It is a schematic structural diagram of a battery pack with a shock absorption structure according to an embodiment of the present application;

[0039] Figure 17 It is a schematic diagram of the overall structure of an outdoor working device according to an embodiment of the present application;

[0040] Figure 18 It is a schematic diagram of the overall structure of an outdoor working device according to another embodiment of the present application;

[0041] Figure 19 It is a schematic diagram of the overall structure of an outdoor working device according to another embodiment of the present application;

[0042] Figure 20 It is a schematic diagram of the overall structure of an outdoor working device according to another embodiment of the present application.

[0043] Meanings of the reference numerals in the figure:

[0044] 100, battery pack; 101, output cell group; 102, odd-row cell group; 103, even-row cell group; 104, mounting bracket; 1041, first bracket; 1042, second bracket; 105, first mating surface; 106, second mating surface; 107, assembly part; 108, limiting part; 109, electrode connecting piece; 1091, recessed structure; 1092, protruding structure; 1093, second connecting part; 110, through hole; 111, BMS board; 112, positive electrode plate; 1121, first mating part; 1122, second mating part; 1123, inclined surface; 113, cell; 1131, end face; 1132, side wall; 1133, protruding structure; 114, negative electrode plate; 115, mounting seat; 116, conductive part; 1161, pin; 1162, fixing hole; 117, collecting part; 1171, first connecting part; 118, supporting part; 119, shock-absorbing structure; 120, plane; 121, handle; 122, heat dissipation slot; 123, limiting part; 200, main frame; 300, operation assembly; 400, seat; 500, traveling assembly; 600, power output assembly. [Specific Embodiments]

[0045] 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 clearly and completely described below with reference to the accompanying 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 those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0046] A battery pack is generally formed by connecting multiple single cells in series and parallel, and a battery management system (BMS) is also added. It can be directly applied as an independent module to other devices.

[0047] However, in existing battery packs, the layout of the battery cells is relatively traditional. Generally, all the battery cells are neatly arranged or all the battery cells are staggered. Such a setting sometimes cannot well adapt to the installation of other components in the battery pack, resulting in insufficient utilization of the overall space inside the battery pack.

[0048] Moreover, in existing battery packs, the heat dissipation efficiency of the battery cells is improved by staggering the battery cells, that is, the battery cell groups in adjacent different rows are set at different heights, and usually the two most distal battery cell groups in opposite rows are selected as the positive and negative output terminals. Since the heights of the battery cell groups at both ends are different, the positive and negative electrode plates are often 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 are at the same height, and then the positive and negative electrode plates are connected to the BMS board at the same height. However, if electrode plates of different lengths are used for connection, it not only increases the complexity of the production of the positive and negative electrode plates, but also indirectly increases the assembly cost of the battery pack.

[0049] In addition, the battery cell group at the higher end will occupy the space of the battery pack. In order to adapt to the installation of other components, the height of the battery pack will be increased as a whole, resulting in a relatively large space occupied by the entire battery pack, which affects the adaptability of the battery pack to other devices (such as outdoor working devices or power tools).

[0050] Please refer to Figures 1 to 19 As shown, the battery pack 100 of an embodiment disclosed in the present application includes a housing and a plurality of battery cells 113 disposed in the housing. The plurality of battery cells 113 are configured as follows: The first battery cell group 113 includes two output battery cell groups 101 having the same height on a plane 120. The output battery cell groups 101 are configured to be connected to the positive or negative electrode of the battery pack 100 to output electric energy externally; The second battery cell group 113 includes an odd-numbered row battery cell group 102 and an even-numbered row battery cell group 103. The odd-numbered row battery cell group 102 and the even-numbered row battery cell group 103 are arranged in a staggered manner on the plane 120; wherein, the height of the output battery cell group 101 is different from the height of both the odd-numbered row battery cell group 102 and the even-numbered row battery cell group 103.

[0051] By setting the height of the output battery cell group 101 for electric energy output to be different from the height of both the odd-numbered row battery cell group 102 and the even-numbered row battery cell group 103 in this way, it is possible to make full use of the internal space of the battery pack 100 and make the spatial layout of the battery pack 100 more reasonable.

[0052] Such asFigure 1 and Figure 6 As shown in Figure 6 , an installation bracket 104 is further provided inside the housing of the battery pack 100 of the present application. A plurality of assembly parts 107 are provided inside the installation 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 installation bracket 104 includes a first bracket 1041 and a second bracket 1042 combined together. Assembly parts 107 are provided on both the first bracket 1041 and the second bracket 1042, and the assembly parts 107 on the first bracket 1041 and the second bracket 1042 are arranged correspondingly. Both ends of the battery cell 113 are inserted into the assembly parts 107 on the first bracket 1041 and the second bracket 1042 respectively to be mounted on the installation bracket 104. After the first bracket 1041 and the second bracket 1042 are combined, they form a substantially square structure.

[0053] As Figure 2 shown in Figure 2 , in a specific embodiment, the height h2 of the output battery cell group 101 is located between the height h1 of the odd-row battery cell group 102 and the height h3 of the even-row battery cell group 103. By setting the height h2 of the output battery cell group 101 between the height h1 of the odd-row battery cell group 102 and the height h3 of the even-row battery cell group 103, the output battery cell group 101 does not additionally occupy the space in the height direction, but only arranges between the height h1 of the odd-row battery cell group 102 and the height h3 of the even-row battery cell group 103, saving the space occupied by the layout of the battery pack 100.

[0054] Furthermore, two rows of output battery cell groups 101 are respectively arranged at both ends in the arrangement direction of the second battery cell group 113. In the case where the height h2 of the two rows of output battery cell groups 101 is located between the height h1 of the odd-row battery cell group 102 and the height h3 of the even-row battery cell group 103, the two rows of output battery cell groups 101 are also located at both ends of the layout of the entire battery cell 113 group. In this way, the battery cell 113 group encloses a square structure, and sufficient reserved space will be formed at the four corners of the square structure, and this reserved space area can be used to reinforce the structure of the installation bracket 104 at the four corners, so as to increase the strength of the installation bracket 104, and further increase the anti-drop ability and anti-impact ability of the battery pack 100.

[0055] Furthermore, at least one row of the two rows of output battery cell groups 101 is arranged between the second battery cell groups 113. Such a setting is beneficial for the output battery cell groups 101 to be closer in layout.

[0056] In a specific embodiment, the output battery cell group 101, the odd-row battery cell group 102, and the even-row battery cell group 103 have the same length. This makes the arrangement of the battery cells 113 more regular, and thus is beneficial for making the internal space layout of the housing more compact.

[0057] Please refer to Figure 2 , in a specific embodiment, each cell group 113 in the first cell group 113 and the second cell group 113 includes an even number of cells 113, and the even number of cells 113 are connected in parallel in pairs. Preferably, the battery pack 100 in the present application includes 32 cells 113, which are respectively arranged in 8 rows of cell groups 113, and each row of cell groups 113 contains four cells 113. Among them, two rows are output cell groups 101, and the remaining are 3 rows of odd-row cell groups 102 and 3 rows of even-row 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 set into 16 groups of cells 113 connected in parallel in pairs, and then the 16 groups of cells 113 are connected in series to output electric energy externally.

[0058] In the present application, the cell 113 is preferably a cylindrical cell 113, its diameter is generally greater than 38 mm, preferably 40 mm, the length of the cell 113 is generally greater than or equal to 130 mm, preferably 130 mm. And the nominal voltage of a single cell 113 is greater than or equal to 3.2 V, preferably 3.2 V. The nominal capacity of the cell 113 is greater than or equal to 15 Ah, preferably 20 Ah.

[0059] The weight of the battery pack 100 assembled from the above cells 113 is greater than or equal to 11.4 Kg, preferably 16 Kg, the nominal energy of the battery pack 100 is greater than or equal to 1.54 Kwh, preferably 1.6 Kwh, and the nominal voltage of the battery pack 100 is greater than or equal to 51.2 v, preferably 58 v.

[0060] As Figure 9 shown, in a specific embodiment, one row of the two rows of output cell groups 101 is used to connect the positive electrode plate 112, and the other row is used to connect the negative electrode plate 114, and the positive electrode plate 112 and the negative electrode plate 114 have the same height. Since the positive electrode plate 112 and the negative electrode plate 114 also need to be connected to other components, other components connected to the positive electrode plate 112 and the negative electrode plate 114 can be kept horizontal relative to the positive electrode plate 112 and the negative electrode plate 114, making the spatial layout of the battery pack 100 more compact in the height direction.

[0061] In a specific embodiment, the distance between the positive electrode plate 112 and the negative electrode plate 114 is greater than or equal to 200 mm. Such a setting can effectively prevent the situation of short circuit caused by the positive electrode plate 112 and the negative electrode plate 114 being wired together during assembly or use. Preferably, the distance between the positive electrode plate 112 and the negative electrode plate 114 is 200 mm or 225 mm.

[0062] As Figure 6 and Figure 7As shown, in a specific embodiment, a collector 117 for collecting information of multiple battery cells 113 is provided on the mounting bracket 104. A first connection portion 1171 is provided on the collector 117. A plurality of electrode connection pieces 109 are connected between the battery cells 113. A second connection portion 1093 is provided on the electrode connection piece 109. 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 collector 117, and the second connection portion 1093 is a connecting member capable of mating with the opening. The connecting member is a convex block that is inserted and mated with the opening, and the convex block and the electrode connection piece 109 are of an integrally formed structure. During the specific assembly process, after the connecting member is connected to the opening, the two are fixedly connected by welding.

[0063] As Figure 3 and Figure 6 shown, further, electrode connection pieces 109 are connected to both ends of the multiple battery cells 113. Along the direction parallel to the axis of the battery cell 113, the ratio of the projected area of the collector 117 to the total projected area of all the electrode connection pieces 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 connection pieces 109 covered by the collector 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 collector 117 to the total projected area of all the electrode connection pieces 109 at one end of the battery cell 113 is 1 / 3, 2 / 5 or 1 / 2.

[0064] As Figure 4 , Figure 5 and Figure 7 shown, the thickness of the electrode connection piece 109 is greater than 0.5 mm and less than or equal to 1.8 mm, which is beneficial to improving the firmness of the connection between the electrode connection piece 109 and the positive or negative electrode of the battery cell 113, so as to prevent the electrode connection piece 109 from being welded through. Preferably, the thickness of the electrode connection piece 109 is 0.6 mm, 1 mm, 1.5 mm or 1.8 mm.

[0065] In a specific embodiment, the sum of the numbers of the positive electrode plate 112, the negative electrode plate 114 and the electrode connection piece 109 of the present application is 17. There are two collectors 117 in total, and they are distributed at both ends of the battery cell 113. Therefore, there are at least 17 collection points on the two collectors 117, and each collection point respectively collects different positive electrode plates 112, negative electrode plates 114 and electrode connection pieces 109.

[0066] As Figure 4 , Figure 5 and Figure 8As shown, further, a recessed structure 1091 is provided in the area where the electrode connecting piece 109 is connected to the battery cell 113, and a protruding structure 1133 is provided at the end of the battery cell 113. When the electrode connecting piece 109 and the battery cell 113 are assembled, the protruding structure 1133 of the battery cell 113 is located within the recessed structure 1091. This is beneficial for shortening the distance of the entire battery pack 100 along the axial direction of the battery cell 113, making the battery pack 100 compact in size. Specifically, both ends of the battery cell 113 are convex structures.

[0067] Of course, during the production and processing of the electrode connecting piece 109, the recessed structure 1091 of the electrode connecting piece 109 is formed by stamping. As a result, a protruding-shaped structure 1092 is formed on the opposite side of the recessed structure 1091 of the electrode connecting piece 109. The protruding structure 1133 of the battery cell 113 can also be connected to the protruding-shaped structure 1092 of the electrode connecting piece 109. This will create a sufficient heat dissipation gap between the end of the battery cell 113 and the electrode connecting piece 109, which is beneficial for the heat dissipation of the battery cell 113.

[0068] As Figure 4 , Figure 5 and Figure 7 shown, further, the electrode connecting piece 109 can be a rhombus structure or a strip structure. In a specific embodiment, during assembly, one end of the battery cell 113 group can use the electrode connecting piece 109 with a rhombus structure, and the other end can use the electrode connecting piece 109 with a strip structure. Of course, the two ends of the battery cell 113 group can use the electrode connecting piece 109 with the same structure. For example, both ends of the battery cell 113 group use the electrode connecting piece 109 with a rhombus structure (such as Figure 4 or Figure 5 ) or both ends of the battery cell 113 group use the electrode connecting piece 109 with a strip structure (such as Figure 7 ).

[0069] Please also refer to Figure 9 and Figure 10 . In a specific embodiment, conductive members 116 are respectively connected between the BMS board 111 and the positive electrode plate 112 and the negative electrode plate 114. One side of a conductive member 116 is used to be attached to the positive electrode plate 112 or the negative electrode plate 114, and the other side is used to be attached to the BMS board 111. By providing the conductive member 116 between the positive electrode plate 112 or the negative electrode plate 114 and the BMS board 111, the electrical contact between the two is made more stable.

[0070] As Figure 10, Further, a plurality of pins 1161 are provided at the edge of the conductive member 116, and jacks mating with the pins 1161 are 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. The pins 1161 are arranged around the square sheet-like structure, and the pins 1161 are arranged on the same side of the conductive member 116. During installation, the pins 1161 are inserted into the jacks, and then the conductive member 116 is welded to the BMS board 111 by welding, which increases the connection stability and firmness between the two. When assembling, the positive electrode plate 112 or the negative electrode plate 114 is located below, the conductive member 116 is in the middle, and the BMS board 111 is above. Then, the positive electrode plate 112 or the negative electrode plate 114 is connected to the BMS board 111 by screwing. The sheet-like conductive member 116 is beneficial to its full contact and fit with the BMS board 111 and the positive electrode plate 112 or the negative electrode plate 114, maintaining a good electrical signal connection. Of course, the connection between the positive electrode plate 112 or the negative electrode plate 114 and the BMS board 111 can also be other fixing methods, such as snap connection, bonding, tin soldering, etc., as long as the normal connection between the two can be ensured.

[0071] In a specific embodiment, the acquisition member 117 is connected to the BMS board 111 through a wire harness, so that the acquisition member 117 can timely transmit the information of the battery cell 113 collected 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 member 117 and the BMS board 111 can also be other connection methods other than the wire harness.

[0072] In a specific embodiment, the extending direction of the BMS board 111 is parallel to the axial direction of the battery cell 113, making the layout between the BMS board 111 and the battery cell 113 more compact and saving space.

[0073] Please also refer to Figure 11 , In a specific embodiment, the outer surface of the mounting bracket 104 includes a first mating surface 105. A mounting seat 115 is provided on the mounting bracket 104, and a second mating surface 106 is included on the mounting seat 115. First mating portions 1121 and second mating portions 1122 are respectively provided on the positive electrode plate 112 and the negative electrode plate 114. The first mating portion 1121 is used to cooperate with the first mating surface 105, and the second mating portion 1122 is used to cooperate with the second mating surface 106. The setting of multiple mating portions increases the mounting stability of the positive electrode plate 112 and the negative electrode plate 114.

[0074] In a specific embodiment, a groove is formed on one surface of the mounting seat 115, and this 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.

[0075] Furthermore, both the first mating portion 1121 and the second mating portion 1122 of the positive electrode sheet 112 extend towards the same side of the positive electrode sheet 112, and both the first mating portion 1121 and the second mating portion 1122 of the negative electrode sheet 114 extend towards 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. After the first mating portion 1121 is bent towards 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 towards one side of the positive electrode sheet 112, it is bent again to form the second mating portion 1122. In specific operation, both the first mating portion 1121 and the second mating portion 1122 extend towards the side of the mounting bracket 104 to facilitate stable connection with the upper BMS board 111.

[0076] Furthermore, an inclined surface 1123 is formed at the connection of the first mating portion 1121 and the second mating 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 cooperation degree 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.

[0077] Please also refer to Figure 3 , in a specific embodiment, a limiting portion 123 is further provided on the mounting seat 115. The limiting portion 123 is used for limiting and cooperating 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 assembly efficiency.

[0078] In a specific embodiment, in order to reduce the shaking of the battery cell 113 in the mounting bracket 104, a plurality of assembling portions 107 adapted to assemble 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 assembling portion 107. Generally, the assembling portion 107 is an installation groove. During assembly, the battery cell 113 is assembled in the installation groove. Through the arrangement of the limiting member 108, the shaking of the battery cell 113 is restricted, usually restricting 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 large shaking, so as to prevent the occurrence of liquid leakage.

[0079] Further, the limiting member 108 protrudes from the inner wall of the assembling portion 107 into the inner cavity of the assembling portion 107, and the surface of the limiting member 108 cooperating with the battery cell 113 is a guiding surface. When the battery cell 113 is assembled into the assembling portion 107, the guiding surface is conducive to guiding the movement of the battery cell 113 into the assembling portion 107, and the interference fit between the limiting member 108 and the outer wall of the battery cell 113 realizes the limiting of the battery cell 113 in the assembling portion 107.

[0080] Further, the battery cell 113 is a cylindrical battery cell 113, the assembling portion 107 is a circular assembling portion 107, and the ratio of the length of the limiting member 108 in the radial direction of the battery cell 113 to 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 setting, while ensuring that the limiting member 108 plays a limiting role on the battery cell 113, the limiting member 108 also occupies a relatively small space in the radial direction of the assembling portion 107. Therefore, when planning the assembling portion 107, the overall size of the assembling portion 107 will not be occupied by a large size of the limiting member 108, which helps the design of the compactness of the battery pack 100. Preferably, the ratio of the length of the limiting member 108 in the radial direction of the battery cell 113 to the diameter of the battery cell 113 is 0.02, 0.03 or 0.05.

[0081] Such as Figure 12 、 Figure 14 and Figure 15 In a specific embodiment, a supporting portion 118 is provided at the end of the assembling portion 107. In the axial direction of the battery cell 113, the ratio of the projected area of the supporting portion 118 to the projected 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 setting is also to ensure that while the limiting member 108 plays a limiting role on the battery cell 113, the limiting member 108 occupies a relatively small space.

[0082] The supporting portion 118 is used to limit the battery cell 113 during assembly so that the battery cell 113 remains in the assembling portion 107.

[0083] Please also refer to Figure 13, Further, in the axial direction of the battery cell 113, the ratio of the projected area of the support portion 118 to the projected 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 projected area of the support portion 118 to the projected area of the end face 1131 of a single battery cell 113 is 0.0025, 0.0026 or 0.0028. Such a setting makes the area of the support portion 118 smaller, and further 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 is also beneficial to the battery cell 113 to leak out more parts through the through hole 110, so as to be connected to the remaining electrode connecting pieces 109 or the positive electrode connecting piece or the negative electrode connecting piece.

[0084] In a specific embodiment, a limiting member 108 is provided at any one of the middle part and both ends 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 improves the stability of the battery cell 113.

[0085] Specifically, the limiting member 108 is a bump formed radially inwards from the inner wall of the assembly portion 107.

[0086] In a specific embodiment, a plurality of limiting members 108 are provided. Preferably, three limiting members 108 are provided on the inner wall of an assembly portion 107. The three limiting members 108 can be on the same horizontal plane 120 in the axial direction or on different horizontal planes 120.

[0087] Such as Figure 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. It is beneficial to buffer the shaking of the mounting bracket 104 and the battery cell 113 in the housing and reduce the occurrence of damage to the battery cell 113.

[0088] Such as Figure 1 , Further, heat dissipation slots 122 are provided on the housing. The heat dissipation slots 122 are provided on two opposite faces of the housing to facilitate convection. Specifically, they are provided in the up-down direction of the housing. The provision of the heat dissipation slots 122 is beneficial to dissipate the heat generated when the battery cell 113 is charged or discharged.

[0089] Such as Figure 1 , A handle 121 is provided on the upper part of the housing. The handle 121 is beneficial to carry the battery pack 100 so that the battery pack 100 can be assembled with other devices for charging or discharging the battery pack 100.

[0090] In a specific embodiment, the ratio of the area of the side wall 1132 of the battery cell 113 located within the assembly portion 107 to the area of the entire 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 setting ensures that the area enclosed within the assembly portion 107 does not exceed half of the side wall 1132 of the battery, which is conducive 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 within the assembly portion 107 to the area of the entire side wall 1132 of the battery cell 113 is 1 / 3, 2 / 5, or 1 / 2.

[0091] As Figure 17 , this application also provides an outdoor working device, which includes the above-mentioned battery pack 100. The battery pack 100 includes: a housing and a plurality of battery cells 113 disposed within the housing; the plurality of battery cells 113 are configured as follows: a first battery cell 113 group, including two rows of output battery cell groups 101 having the same height on a plane 120, and the output battery cell groups 101 are configured to be connected to the positive or negative electrode of the battery pack 100 to output electrical energy externally; a second battery cell 113 group, including an odd-row battery cell group 102 and an even-row battery cell group 103, and the odd-row battery cell group 102 and the even-row battery cell group 103 are arranged in a staggered manner on the plane 120; wherein, the height of the output battery cell group 101 is different from the heights of both the odd-row battery cell group 102 and the even-row battery cell group 103.

[0092] The outdoor working device includes a main frame 200, a seat 400, a power output assembly 600, a traveling assembly 500, an operating assembly 300, and a power supply device.

[0093] Furthermore, the main frame 200 extends in a first linear 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. The main frame 200 is also used to install the power output assembly 600, the traveling assembly 500, the operating assembly 300, and the power supply device. The power supply device is used to provide an energy source for the electrical units of the entire outdoor working device, such as enabling the cutting assembly to perform cutting operations, and enabling the traveling assembly 500 to support the main frame 200 and the related components on the main frame 200 to travel and for the power consumption of other electrical units. The power supply device includes a battery compartment and a battery pack, and the power supply device is specifically the above-mentioned battery pack 100.

[0094] The power output component 600 is a workpiece for realizing the tool function. In this embodiment, the outdoor working device is a ride-on mower, and the power output component 600 is specifically a cutting component for outputting power to realize the mowing function of the ride-on mower. The cutting component is set to 2 groups or 3 groups. The cutting component is arranged below the main frame 200. In one embodiment, the cutting component includes: a cutter head, a mowing element, and a cutting motor. The mowing element is used for cutting vegetation such as grass when rotating at a high speed. For example, the mowing element is a blade for cutting the vegetation on the lawn. The cutter head forms 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 respectively. 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 respectively.

[0095] Of course, the power output component 600 can also be detached from the outdoor working device. In some embodiments, it can be understood that the power output component 600 can be replaced by other components. Therefore, the outdoor working device can not only cut vegetation, but also replace the cutting component with functional components such as snow shoveling, snow sweeping, snow blowing, and flushing. Those skilled in the art should be able to adaptively replace various functional components without creative labor, and the above should all be included in the protection scope of this embodiment.

[0096] The traveling component 500 includes traveling wheels arranged on the main frame 200 and a traveling motor for driving the traveling wheels. The traveling wheels are arranged on both sides of the main frame 200 so that the center of gravity of the outdoor working device remains within the main frame 200 to reduce the probability of the outdoor working device tipping over during traveling. In one embodiment, the number of traveling wheels is set to 4, including 2 front traveling wheels and 2 rear traveling wheels respectively. The front traveling wheels can be universal wheels. The traveling motor is connected to the rear traveling wheels and drives the rear traveling wheels to rotate. The 2 rear traveling wheels are both matched with the traveling motor, and the rotational speeds of the 2 traveling motors can be the same or different. When the user rides the outdoor working device straight, the rotational speeds of the two traveling motors are approximately the same; when the user rides the outdoor working device to turn, the rotational speeds of the two traveling motors are different, and the outdoor working device turns to the side with the lower rotational speed of the traveling motor. In some embodiments, the diameter of the front traveling wheels is smaller than that of the rear traveling wheels. Of course, the number of traveling wheels can also be set to 3 or 5.

[0097] In one embodiment, the traveling wheels can be configured as a traveling device of other structures for supporting the outdoor working device to travel.

[0098] The operation component 300 includes a left operating lever and a right operating lever disposed on the left and right sides of the outdoor working device. The user can control the outdoor working device to move forward, backward or turn by manipulating the left and right operating levers. The operation component 300 can also be a steering wheel capable of controlling the outdoor working device. This application also includes a braking component, which is disposed 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 device.

[0099] The power supply device is arranged at the rear of the outdoor working device. 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. The battery pack is electrically connected to the electrical connection terminals on the battery compartment through the electrical connection terminals on it to supply power to the outdoor working device. Preferably, the battery compartment can be set to accommodate battery packs with different capacitances to increase the adaptability of the outdoor working device to different battery packs. Among them, the battery pack can also be removed to supply power to other electric tools, increasing the multi-purpose nature of the battery pack. Compared with the traditional use of fossil fuels as the energy source, the outdoor working device of this application is more environmentally friendly and more in line with the long-term development plan. Preferably, the battery pack is preferably made of lithium iron phosphate battery cells or ternary lithium battery cells.

[0100] As Figure 18 、 Figure 19 and Figure 20 shown, it shows the structural schematic diagram of the outdoor working device in another embodiment.

[0101] The outdoor working device can be implemented as an agricultural working vehicle, specifically exemplified as a UTV vehicle, such as Figure 18 and Figure 19 or a tractor, such as Figure 20 . The battery compartment can be arranged at the front of the vehicle body of the UTV vehicle or the tractor. There is an openable battery compartment cover on the top of the battery compartment, 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 the tractor.

[0102] The connection between the battery pack 100 and the UTV vehicle or the tractor is a detachable connection for easy replacement of the battery pack 100.

[0103] In this embodiment, the operation component 300 is the steering wheel 300 on the UTV vehicle or the tractor. The steering wheel 300 can be used to control the steering of the UTV vehicle or the tractor, and a display screen can be positioned on the steering wheel 300.

[0104] Specifically, the display screen can display the power of the battery pack 100, which helps the user to judge the working area of the outdoor working device according to the remaining power to replace the battery pack 100.

[0105] The display screen can also display the information of the battery cell 113 collected in real time by the electrode connecting piece 109, the positive electrode piece 112 or the negative electrode piece 114, which is convenient for users or maintenance personnel to accurately obtain the position of the faulty battery cell 113 in case of a fault, so as to perform timely maintenance or replacement of the battery cell 113.

[0106] Of course, the display screen can also display the working temperature of the battery pack 100. Since too high or too low temperature will affect the actual endurance of the battery, and too high temperature will cause spontaneous combustion of the battery pack 100, resulting in dangerous accidents. Through the display screen, the working temperature of the battery pack 100 can be understood in time, and corresponding measures can be taken, such as shutting down and other processing methods.

[0107] The steering wheel 300 is located in front of the seat on the vehicle frame, and its upper surface can be tilted at a certain angle towards the seat, which is convenient for the user to operate the steering wheel 300 and can be more towards the user's face, so as to facilitate the user to view the display screen. The steering wheel 300 can also be set to a structure with adjustable angle 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 height-adjustable. When users of different heights use it, it can be adjusted according to their own height requirements. The height of the steering wheel can be adjusted manually or electrically.

[0108] Exemplarily, Figure 18 and Figure 19 both are UTV vehicles. Among them, Figure 18 the one shown is a UTV vehicle with a single-row seat, Figure 19 and the one shown is a UTV vehicle with a double-row seat. Attachment mechanisms, such as carrying buckets, etc., can be provided at the tails of the UTV vehicle with a single-row seat and the UTV vehicle with a double-row seat.

[0109] Exemplarily, Figure 20 what is shown is a tractor, and a trailer can be mounted at its tail.

[0110] This application is not limited to the above specific embodiments. Those of ordinary skill in the art can easily understand that, without departing from the principles and scope of this application, there are many alternative solutions for the battery pack of this application. The protection scope of this application shall be subject to the content of the claims.

Claims

1. A battery pack, comprising a housing and a plurality of battery cells disposed in the housing, characterized in that: The multiple battery cells are configured as multiple rows of battery cell groups, and at least two rows of the multiple rows of battery cell groups have the same height on a plane, wherein the battery cell groups with the same height are configured as output battery cell groups connected to the positive or negative pole of the battery pack to output electrical energy to the outside.

2. The battery pack according to claim 1, characterized in that: The multiple rows of battery cell groups further include odd-numbered battery cell groups and even-numbered battery cell groups, and the odd-numbered battery cell groups and the even-numbered battery cell groups are alternately arranged on the plane.

3. The battery pack according to claim 2, characterized in that: The height of the output battery cell group is between the height of the odd-numbered battery cell groups and the height of the even-numbered battery cell groups.

4. The battery pack according to claim 2, characterized in that: The two rows of output cell groups are respectively arranged at two ends of the odd-numbered cell groups and the even-numbered cell groups in an arrangement direction.

5. The battery pack according to claim 2, characterized in that: At least one of the two rows of output cell groups is arranged between the odd-numbered cell groups and the even-numbered cell groups.

6. The battery pack according to claim 4 or 5, characterized in that: The output battery cell group, the odd-numbered battery cell group and the even-numbered battery cell group have the same length.

7. The battery pack according to claim 4 or 5, characterized in that: One of the two rows of output battery cell groups is used to connect positive electrode sheets, and the other row is used to connect negative electrode sheets. The heights of the positive electrode sheets and the negative electrode sheets are the same.

8. The battery pack according to claim 7, characterized in that: It also includes a mounting bracket arranged in the shell, a plurality of the battery cells are arranged in the mounting bracket, a collecting component for collecting information of the plurality of battery cells is arranged on the mounting bracket, a first connecting part is arranged on the collecting component, 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 be connected to the second connecting part.

9. The battery pack according to claim 8, characterized in that: A BMS board connected to the collection component is also provided in the shell, and conductive components are respectively connected between the BMS board and the positive electrode sheet and the negative electrode sheet, and two sides of the conductive component are respectively attached to the positive electrode sheet and the negative electrode sheet.

10. An outdoor working equipment, characterized in that: include: A power output assembly configured to output power to perform outdoor work; A walking assembly, configured to support the outdoor working equipment in walking; and, The battery pack according to any one of claims 1 to 9, wherein the battery pack is configured to provide electrical energy for the outdoor working equipment.

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