Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, the battery pack has a first direction and a second direction which are intersected, the battery pack comprises a shell, a plurality of electrode assemblies and a switching circuit board, the shell is provided with an accommodating cavity, the plurality of electrode assemblies are arranged along the first direction and arranged in the accommodating cavity, and each electrode assembly comprises a battery cell and a tab which are in conductive connection; tabs of the plurality of electrode assemblies are arranged along a first direction; the switching circuit board comprises a board body and a plurality of first bonding pads arranged at intervals in the first direction, the board body is provided with a plurality of first channels, and the first channels penetrate through the board body in the second direction; the first bonding pad is arranged on one side, far away from the battery cell, of the plate body in the second direction and is connected with the plate body; the plurality of first bonding pads and the plurality of first channels are alternately arranged along a first direction; and at least two adjacent tabs are arranged in one first channel in a penetrating manner and are conductively connected with one first bonding pad. The battery pack structure can be simplified, the integration level is improved, and the short-circuit risk is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery pack and a power utilization device. BACKGROUND

[0002] A low-voltage battery pack has a small overall envelope, and the requirement for integration is also relatively strict. However, in the prior art, the components in the low-voltage battery pack are isolated, and busbars and flexible circuit boards are still assembled as independent electrical components in the whole pack, which affects the integration of the low-voltage battery pack. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims to solve the problem that the components in the low-voltage battery pack are isolated, and busbars and flexible circuit boards are still assembled as independent electrical components in the whole pack, which affects the integration of the low-voltage battery pack. Another object of the application is to provide a power utilization device.

[0004] TECHNICAL SCHEME: The battery pack provided in the application has intersecting first and second directions, and comprises:

[0005] A shell having a receiving cavity;

[0006] A plurality of electrode assemblies arranged along the first direction, the plurality of electrode assemblies being arranged in the receiving cavity, and each electrode assembly comprising an electrically conductive connection between an electrode core and a tab, and the plurality of electrode assemblies being arranged along the first direction;

[0007] An adapter circuit board comprising:

[0008] A board body arranged along the second direction on one side of the electrode core, the board body having a plurality of first channels arranged along the first direction, and the first channels penetrating through the board body along the second direction;

[0009] A plurality of first pads arranged along the first direction and arranged on a side of the board body away from the electrode core and connected to the board body, the plurality of first pads and the plurality of first channels being alternately arranged along the first direction, and at least two adjacent tabs along the first direction being arranged in one first channel and electrically connected to the first pad on one side of the first channel.

[0010] In some embodiments, the battery pack has a third direction intersecting the first and second directions, and the board body comprises:

[0011] A first connecting portion for connecting an electrical component;

[0012] The second connecting portion is arranged along the third direction and is integrally connected with the first connecting portion; the first pad is arranged on the side of the second connecting portion away from the battery cell along the second direction and is connected with the second connecting portion; the first channel penetrates through the second connecting portion along the second direction and is arranged at intervals with the first pad; at least two adjacent tabs along the first direction are arranged in one first channel and are connected to the side of one first pad adjacent to the first channel away from the second connecting portion.

[0013] In some embodiments, the first channel penetrates through the side of the second connecting portion away from the first connecting portion along the third direction.

[0014] In some embodiments, the first channel includes a first segment and a second segment, and the second segment is arranged on the side of the first segment away from the first connecting portion; along the first direction, the size of the second segment is greater than that of the first segment.

[0015] In some embodiments,

[0016] The plate body further includes a third connecting portion arranged along the third direction on the side of the first connecting portion away from the second connecting portion and integrally connected with the first connecting portion;

[0017] The plate body has a plurality of second channels arranged at intervals along the first direction, and the second channels penetrate through the third connecting portion along the second direction;

[0018] The adapter circuit board further includes a plurality of second pads arranged at intervals along the first direction, and the plurality of second pads are arranged on the side of the third connecting portion along the second direction and connected with the plate body; the plurality of second pads and the plurality of second channels are arranged alternately along the first direction;

[0019] The electrode assembly includes two tabs arranged at intervals along the third direction; along the first direction, at least two adjacent tabs close to the third connecting portion are arranged in one second channel and are electrically connected with the second pad located on the side of the second channel, and at least two adjacent tabs close to the second connecting portion are arranged in one first channel.

[0020] In some embodiments, the second channel includes a third segment and a fourth segment, and the fourth segment is arranged on the side of the third segment away from the first connecting portion; along the first direction, the size of the third segment is greater than that of the fourth segment.

[0021] In some embodiments, the first channel and the second channel are arranged to be staggered along the third direction, and the first pad and the second pad are arranged to be staggered along the third direction.

[0022] In some embodiments,

[0023] The second connecting portion is provided with a plurality of first grooves arranged at intervals along the first direction on a side away from the battery cell, and the plurality of first grooves and the plurality of first channels are arranged alternately and at intervals along the first direction; each first pad is embedded in a first groove.

[0024] The third connecting portion is provided with a plurality of second grooves arranged at intervals along the first direction on a side away from the battery cell, and the plurality of second grooves and the plurality of second channels are arranged alternately and at intervals along the first direction; each second pad is embedded in a second groove.

[0025] In some embodiments, the first connecting portion has at least one positioning hole penetrating through the first connecting portion along the second direction.

[0026] Correspondingly, the power consumption device provided by the embodiments of the present application comprises the battery pack as described in any one of the preceding embodiments.

[0027] Advantages: Compared with the prior art, the battery pack provided by the embodiments of the present application has intersecting first and second directions, comprises a shell, a plurality of electrode assemblies, and a relay circuit board, the shell has a receiving cavity, the plurality of electrode assemblies are arranged along the first direction, the plurality of electrode assemblies are arranged in the receiving cavity, the electrode assembly comprises a battery cell and a tab electrically connected to each other, and the tabs of the plurality of electrode assemblies are arranged along the first direction. The relay circuit board comprises a board body and a plurality of first pads arranged at intervals along the first direction, the board body has a plurality of first channels arranged at intervals along the first direction, the first channels penetrate through the board body along the second direction; the plurality of first pads arranged at intervals along the first direction are arranged on a side of the board body away from the battery cell and connected to the board body along the second direction; the plurality of first pads and the plurality of first channels are arranged alternately along the first direction; at least two adjacent tabs are arranged in a first channel along the first direction and electrically connected to a first pad on one side of the first channel. According to the embodiments of the present application, the tabs of the electrode assemblies are directly welded to the relay circuit board to realize electrical connection, compared with the combination of the traditional busbar, the electrical isolation support, and the like, the internal structure of the battery is effectively simplified, the integration of the battery pack is effectively improved, and the volume energy density of the battery pack is improved. In addition, the relay circuit board of the present application is arranged alternately with the plurality of first pads and the plurality of first channels on the board body, at least two adjacent tabs are arranged in a first channel and connected to a first pad, the connection between the adjacent electrode assemblies is realized, and the short circuit risk of the electrode assemblies is effectively reduced.

[0028] Compared with the prior art, the power utilization device provided by the embodiment of the present application comprises the battery pack as described in any one of the foregoing embodiments. It can be understood that the power utilization device provided by the embodiment of the present application comprises all the technical features and technical effects of the foregoing embodiments, which will not be described herein. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0030] Figure 1 is a schematic diagram of the overall structure of a battery pack according to an embodiment of the present application;

[0031] Figure 2 is an exploded view of a battery pack according to an embodiment of the present application;

[0032] Figure 3 is a schematic diagram of the structure of the connection between an electrode assembly and a conversion circuit board according to an embodiment of the present application;

[0033] Figure 4 is a schematic diagram of the arrangement of an electrode assembly and the folding and bending of the tabs according to an embodiment of the present application;

[0034] Figure 5 is a top view of a conversion circuit board according to an embodiment of the present application;

[0035] Figure 6 is Figure 5 is a sectional view along the A-A sectional line in

[0036] Figure 7 is Figure 5 is a sectional view along the B-B sectional line in

[0037] Figure 8 is a top view of a plate body according to an embodiment of the present application;

[0038] Figure 9 is a perspective view of a conversion circuit board according to an embodiment of the present application.

[0039] Label: 1, housing; 11, containing cavity; 2, electrode assembly; 21, battery cell; 22, tab; 3, adapter circuit board; 31, board body; 311, first channel; 3111, first section; 3112, second section; 312, first connecting part; 3121, positioning hole; 313, second connecting part; 3131, first groove; 314, third connecting part; 3141, second groove; 315, second channel; 3151, third section; 3152, fourth section; 33, first pad; 34, second pad; X, first direction; Z, second direction; Y, third direction. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, at least one of which can be one, two or more, unless otherwise specifically limited. In the description of the present application, "perpendicular" means completely perpendicular to 90° or almost completely perpendicular, for example, within an angle range of 80°-100°, it is considered as perpendicular, similarly, "parallel" means completely parallel or almost completely parallel, for example, within a range of 10° of complete parallel, it is considered as parallel.

[0042] It should be noted that in the drawings of the present application, the arrow marked X indicates the first direction X, the arrow marked Z indicates the second direction Z, and the arrow marked Y indicates the third direction Y. The first direction X, the second direction Z and the third direction Y are introduced to facilitate the description of the positional relationship of the structure of the battery pack, and to facilitate understanding of the structure. In the embodiments of the present application, the first direction X is the arrangement direction of the plurality of electrode assemblies, the second direction X is the height direction of the plurality of battery packs, and the third direction Y is the arrangement direction of the first connecting portion, the second connecting portion and the third connecting portion; and the first direction X, the second direction Z and the third direction Y intersect, and further, the first direction X, the second direction Z and the third direction Y are perpendicular to each other.

[0043] Soft package batteries have been widely used due to their advantages of light weight, small internal resistance, large capacity and good safety performance. Since the soft package battery is soft and small in size, the busbar and the flexible circuit board used for connecting the tabs are still assembled as independent electrical components in the whole package, which leads to low integration of the soft package battery and low volume energy density of the whole package.

[0044] Therefore, the embodiments of the present application provide a battery pack to solve the above problems.

[0045] Please refer to Figures 1-5 and Figure 9 , the embodiments of the present application provide a battery pack having a first direction X and a second direction Z intersecting, comprising a shell 1, a plurality of electrode assemblies 2 and a conversion circuit board 3, the shell 1 has a receiving cavity 11, the plurality of electrode assemblies 2 are arranged along the first direction X, the plurality of electrode assemblies 2 are arranged in the receiving cavity 11, the electrode assembly 2 comprises an electric core 21 and a tab 22 connected in conductive manner, and the tabs 22 of the plurality of electrode assemblies 2 are arranged along the first direction X; the conversion circuit board 3 comprises a board body 31 and a plurality of first pads 33 arranged along the first direction X, and the board body 31 is arranged on one side of the electric core 21 along the second direction Z. The board body 31 has a plurality of first channels 311 arranged along the first direction X, and the first channels 311 penetrate the board body 31 along the second direction Z; the plurality of first pads 33 arranged along the first direction X are arranged on the side of the board body 31 away from the electric core 21 along the second direction Z and connected with the board body 31; the plurality of first pads 33 and the plurality of first channels 311 are alternately arranged along the first direction X; at least two tabs 22 adjacent along the first direction X are arranged in one first channel 311 and conductively connected with the first pad 33 located on one side of the first channel 311.

[0046] The electrode assembly 2 is directly welded with the adapter circuit board 3 to realize electrical connection, compared with the combination of the traditional busbar, electrical isolation support and the like, the internal structure of the battery is effectively simplified, and the integration of the battery is improved. In addition, the adapter circuit board 3 is arranged on the board body 31, a plurality of first pads 33 and a plurality of first channels 311 are alternately arranged, at least two adjacent tabs 22 are gathered in a first channel 311 and connected with a first pad 33, the connection of adjacent electrode assemblies 2 is realized, and the short circuit risk of the electrode assembly 2 is effectively reduced.

[0047] Specifically, in the embodiment of the application, the first pad 33 can be embedded in the board body 31, which can prevent the first pad 33 from falling off and maintain the structural stability of the adapter circuit board 3. The board body 31 can be arranged with a voltage collection line, and the voltage collection line can be conductively connected with the first pad 33. At this time, the voltage on the first pad 33 can be collected through the voltage collection line, and the board member can be an epoxy resin board, which has good insulation and certain hardness, thereby maintaining the structural stability and supporting the first pad 33. The first pad 33 is combined with the board member in the embodiment of the application, which replaces the existing electrical isolation board, busbar and flexible circuit board, which are independently arranged and then combined together, thereby effectively improving the integration of the battery pack and improving the volume energy density of the battery pack.

[0048] In addition, the first channel 311 is arranged between the two adjacent first pads 33, which can isolate the two adjacent first pads 33 and increase the distance between the two adjacent first pads 33, thereby avoiding the short circuit caused by the contact between the tab 22 and the adjacent first pad 33 when the tab 22 is connected to the first pad 33.

[0049] It should be noted that in the embodiment of the application, at least two adjacent tabs 22 are gathered in a first channel 311 and conductively connected with a first pad 33, and at least two adjacent tabs 22 can be understood as two tabs 22 or more than two tabs 22. According to the connection requirements of the plurality of electrode assemblies 2 in the battery pack, the specific setting is carried out. For example, if two or more electrode assemblies 2 are required to be connected in parallel, the tabs 22 of the two or more adjacent electrode assemblies 2 are gathered in a first channel 311, the polarity of the tabs 22 gathered in the first channel 311 is the same, and the parallel connection of the two or more electrode assemblies 2 can be realized. If two adjacent electrode assemblies 2 are required to be connected in series, the tabs 22 of the two adjacent electrode assemblies 2 are gathered in a first channel 311 and conductively connected with a first pad 33, and the polarity of the two tabs 22 is opposite.

[0050] It should be noted that, since the plurality of tabs 22 retracted in the first channel 311 are connected with the same first pad 33, the plurality of tabs 22 can be in contact in the first channel 311 without causing short circuit or connection abnormality and the like.

[0051] Please refer to Figure 3 、 Figure 5 、 Figure 8 and Figure 9 In some embodiments, the battery pack has a third direction Y intersecting with the first direction X and the second direction Z, the plate body 31 includes a first connecting portion 312 and a second connecting portion 313, the first connecting portion 312 is used for connecting electrical components, the second connecting portion 313 is arranged along the third direction Y and connected with the first connecting portion 312; the first pad 33 is arranged on the side of the second connecting portion 313 away from the battery cell 21 along the second direction Z and connected with the second connecting portion 313; the first channel 311 penetrates the second connecting portion 313 along the second direction Z and is arranged spaced apart from the first pad 33; at least two tabs 22 adjacent along the first direction X are arranged in one first channel 311 and connected to the side of the first pad 33 adjacent to the first channel 311 away from the second connecting portion 313.

[0052] In the embodiments of the present application, the plate body 31 is divided into the first connecting portion 312 and the second connecting portion 313, wherein the first connecting portion 312 is used for arranging internal voltage collection lines and the like, and the second connecting portion 313 is used for arranging the first pad 33 and connected with the first pad 33, so that the internal space of the battery pack can be fully utilized by the regional arrangement, and the size of the plate body 31 along the second direction Z can be effectively reduced, so that the size of the plate body 31 in the second direction Z is reduced, and the cost of the plate body 31 is effectively reduced.

[0053] Please refer to Figure 3 、 Figure 5 、 Figure 8 and Figure 9 In some embodiments, the first channel 311 penetrates the side of the second connecting portion 313 away from the first connecting portion 312 along the third direction Y.

[0054] In the embodiments of the present application, the first channel 311 is opened on the side away from the first connecting portion 312, so that the second connecting portion 313 is in the shape of a comb, and the plurality of tabs 22 retracted together can be directly moved and inserted into the first channel 311 along the third direction Y, which is beneficial to retracting the tabs 22 into the first channel 311 and reduces the difficulty of inserting the tabs 22 into the first channel 311.

[0055] AsFigure 5 As shown, in some embodiments, the first channel 311 includes a first section 3111 and a second section 3112, the second section 3112 is arranged on the side of the first section 3111 away from the first connecting portion 312; along the first direction X, the size of the second section 3112 is greater than the size of the first section 3111.

[0056] In the embodiments of the present application, the size of the second section 3112 along the first direction X is greater than the size of the first section 3111 along the first direction X, which is more convenient for the plurality of tabs 22 to enter the second section 3112 first, and then enter the first section 3111 from the second section 3112, so as to realize the positioning of the tabs 22, and then connect with the corresponding first pads 33.

[0057] Furthermore, the inner side walls of the first section 3111 and the second section 3112 are smoothly transitioned, and the size of the second section 3112 along the first direction X gradually increases in the direction away from the first section 3111, which is more convenient for the tabs 22 to be inserted into the first section 3111 from the second section 3112.

[0058] Please refer to Figure 3 , Figure 5 , Figure 8 and Figure 9 , in some embodiments, the board body 31 further includes a third connecting portion 314, the third connecting portion 314 is arranged on the side of the first connecting portion 312 away from the second connecting portion 313 along the third direction Y, and is integrally connected with the first connecting portion 312; the board body 31 has a plurality of second channels 315 arranged at intervals along the first direction X, the second channel 315 penetrates through the third connecting portion 314 along the second direction Z; the adapter circuit board 3 further includes a plurality of second pads 34 arranged at intervals along the first direction X, a plurality of the second pads 34 are arranged on the side of the third connecting portion 314 along the second direction Z, and are connected with the board body 31; a plurality of the second pads 34 and a plurality of the second channels 315 are arranged alternately along the first direction X; the electrode assembly 2 includes two tabs 22, the two tabs 22 are arranged at intervals along the third direction Y, and at least two adjacent tabs 22 along the first direction X close to the third connecting portion 314 are arranged in one second channel 315, and are conductively connected with the second pad 34 located on the side of the second channel 315.

[0059] In the embodiment of the present application, the third connecting part 314 is arranged, so that the adapter circuit board 3 of the embodiment of the present application can connect the positive and negative electrodes of the electrode assembly 2 at the same time, at this time, the positive and negative electrodes of the corresponding electrode assembly 2 are located at the same side of the battery cell 21, and the integrated adapter circuit board 3 can further simplify the internal structure of the battery pack and improve the integration of the battery pack, which is beneficial to the improvement of the energy density of the battery pack. The second channel 315 is used to collect the adjacent tabs 22 that need to be connected to each other, at this time, the problem of short circuit of the tabs 22 can be avoided.

[0060] The second pad 34 can be connected with the voltage collection line in the first connecting part 312 corresponding to the second pad 34, so as to realize voltage signal collection at the second pad 34.

[0061] As shown in Figure 5 In some embodiments, the second channel 315 includes a third section 3151 and a fourth section 3152, the fourth section 3152 is arranged on the side of the third section 3151 away from the first connecting part 312, along the first direction X, the size of the third section 3151 is greater than the size of the fourth section 3152.

[0062] In the embodiment of the present application, the second channel 315 includes a third section 3151 and a fourth section 3152, and the size of the third section 3151 is greater than the size of the fourth section 3152, at this time, when the tab 22 is inserted into the second channel 315, it can be inserted through the third section 3151 first, and then gradually inserted into the second channel 315, and then moved from the third section 3151 to the fourth section 3152 to gradually tighten the tab 22, so as to facilitate the insertion and tightening of the tab 22.

[0063] It should be noted that through the different structural designs of the first channel 311 and the second channel 315, the difficulty of connecting the tab 22 with the adapter circuit board 3 can be reduced. For example, initially, the plurality of tab 22 bundles connected with the second connecting part 313 can be collected respectively, then the adapter circuit board 3 is moved along the third direction Y towards the tab 22, and the plurality of tab 22 bundles are inserted into the first channel 311 through the second section 3112, so as to realize the insertion of the tab 22 on one side, then the tab 22 on the other side is collected into a bundle, then the third connecting part 314 is moved towards one side of the battery cell 21, and a part of the tab 22 is inserted into the third section 3151 first, then the tab 22 is gradually collected through the third section 3151, which is more conducive to the insertion of the tab 22 bundle into the second channel 315, and then the tab 22 is moved to the fourth section 3152 to be collected, so that the adjacent tabs 22 are further closely stacked together, which is convenient for welding with the second pad 34.

[0064] It should be noted that in the embodiments of the present application, the pads can be uniformly arranged on the same side of the channel, so that the tabs 22 are uniformly bent towards one side and welded with the corresponding pads, which can effectively save the battery pack assembly process.

[0065] As shown in Figure 5 and Figure 8 In some embodiments, the first channel 311 and the second channel 315 are arranged in the third direction Y, and the first pad 33 and the second pad 34 are arranged in the third direction Y.

[0066] In the embodiments of the present application, a plurality of electrode assemblies 2 can be arranged in series, at this time, the polarities of the adjacent two tabs 22 in the first direction X are opposite, the adjacent two tabs 22 are inserted into the same channel, and welded with the corresponding pad, to realize the series connection of the adjacent two electrode assemblies 2. Therefore, in the embodiments of the present application, the first channel 311 and the second channel 315 are arranged in the third direction Y, and the first pad 33 and the second pad 34 are arranged in the third direction Y, at this time, the adjacent first channel 311 and second channel 315 in the third direction Y can realize the series connection of the adjacent three electrode assemblies 2 in the first direction X, for example, the negative tab 22 of the first electrode assembly 2 and the positive tab 22 of the second electrode assembly 2 are folded into a second channel 315, and welded with a corresponding second pad 34; the negative tab 22 of the second electrode assembly 2 and the positive tab 22 of the third electrode assembly 2 are folded into a first channel 311, and welded with a corresponding first pad 33, at this time, the series connection of the adjacent three electrode assemblies 2 is realized.

[0067] As shown in Figure 6 , Figure 7 and Figure 8 In some embodiments, the second connecting portion 313 is provided with a plurality of first grooves 3131 arranged in the first direction X, and the plurality of first grooves 3131 and the plurality of first channels 311 are arranged alternately and spaced apart in the first direction X; each first pad 33 is embedded in one first groove 3131; the third connecting portion 314 is provided with a plurality of second grooves 3141 arranged in the first direction X, and the plurality of second grooves 3141 and the plurality of second channels 315 are arranged alternately and spaced apart in the first direction X; each second pad 34 is embedded in one second groove 3141.

[0068] In the embodiment of the present application, the first recess 3131 is arranged to accommodate the first pad 33, and the first pad 33 is embedded in the first recess 3131, thereby achieving effective fixed connection of the first pad 33 with the second connecting part 313; the second recess 3141 is arranged to accommodate the second pad 34, and the second pad is embedded in the second recess 3141, thereby achieving effective fixed connection of the second pad 34 with the third connecting part 314; at this time, the recess absorbs the size of the pad along the second direction Z, which can not only ensure the effective fixation of the pad, but also reduce the overall size of the adapter circuit board 3 along the second direction Z.

[0069] As shown in Figure 5 , Figure 8 and Figure 9 In some embodiments, the first connecting part 312 has at least one positioning hole 3121 which penetrates through the first connecting part 312 along the second direction Z.

[0070] In the embodiment of the present application, the positioning hole 3121 is arranged to achieve the positioning foolproof effect when the adapter circuit board 3 is installed.

[0071] Correspondingly, the present application also provides a power consumption device comprising the battery pack as described in any one of the preceding embodiments.

[0072] It can be understood that the power consumption device of the embodiment of the present application comprises all the technical features and technical effects of the preceding embodiments, which will not be described here.

[0073] Of course, the power consumption device referred to in the present application can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle or an extended range vehicle, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy and an electric plane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator and an electric planer, etc. The embodiments of the present application do not specially limit the above-mentioned power consumption devices.

[0074] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0075] The above has carried out the detailed introduction to the battery pack and the electric device provided by the embodiment of the application, and the principle and implementation mode of the application are described by applying specific examples; the above embodiment description is only used to help understand the technical solutions and core ideas of the application; those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A battery pack, characterized by, A battery pack having a first direction and a second direction intersecting each other, comprising: a housing having a receiving cavity; a plurality of electrode assemblies arranged along the first direction, the plurality of electrode assemblies being arranged in the receiving cavity, the electrode assemblies comprising an electrically conductive connection of an electrode core and a tab, the tabs of the plurality of electrode assemblies being arranged along the first direction; a conversion circuit board comprising: a board body arranged along the second direction on a side of the electrode core, the board body having a plurality of first channels arranged along the first direction and spaced apart, the first channels penetrating through the board body along the second direction; a plurality of first pads arranged along the first direction and spaced apart, the first pads being arranged on a side of the board body away from the electrode core along the second direction and connected to the board body, the first pads and the first channels being alternately arranged along the first direction, at least two adjacent tabs along the first direction being arranged in one first channel and electrically connected to the first pads on a side of the first channel.

2. The battery pack of claim 1, wherein, The battery pack has a third direction intersecting the first direction and the second direction, and the board body comprises: a first connection portion for connecting electrical components; a second connection portion arranged along the third direction and integrally connected to the first connection portion, the first pads being arranged on a side of the second connection portion away from the electrode core along the second direction and connected to the second connection portion, the first channels penetrating through the second connection portion along the second direction and spaced apart from the first pads, at least two adjacent tabs along the first direction being arranged in one first channel and connected to a side of one first pad adjacent to the first channel away from the second connection portion.

3. The battery pack of claim 2, wherein, The first channels penetrate through a side of the second connection portion away from the first connection portion along the third direction.

4. The battery pack of claim 3, wherein, The first channels comprise a first segment and a second segment, the second segment being arranged on a side of the first segment away from the first connection portion, the second segment being larger than the first segment along the first direction.

5. The battery pack of claim 2, wherein: the board body further comprises a third connection portion arranged along the third direction on a side of the first connection portion away from the second connection portion and integrally connected to the first connection portion; the board body has a plurality of second channels arranged along the first direction and spaced apart, the second channels penetrating through the third connection portion along the second direction; the conversion circuit board further comprises a plurality of second pads arranged along the first direction and spaced apart, the second pads being arranged on a side of the third connection portion along the second direction and connected to the board body, the second pads and the second channels being alternately arranged along the first direction. The electrode assembly includes two of the tabs, which are spaced apart along the third direction; along the first direction, at least two adjacent tabs near the third connecting portion are arranged in one of the second channels and conductively connected to one of the second pads on one side of the second channel, and at least two adjacent tabs near the second connecting portion are arranged in one of the first channels.

6. The battery pack of claim 5, wherein, The second channel includes a third section and a fourth section, and the fourth section is arranged on a side of the third section away from the first connecting portion; along the first direction, the third section has a size greater than that of the fourth section.

7. The battery pack of claim 5, wherein, The first channel and the second channel are arranged in a staggered manner along the third direction, and the first pad and the second pad are arranged in a staggered manner along the third direction.

8. The battery pack of claim 5, wherein, The second connecting portion is provided with a plurality of first grooves spaced apart along the first direction on a side away from the battery cell, and the plurality of first grooves and the plurality of first channels are arranged alternately and spaced apart along the first direction; each of the first pads is embedded in one of the first grooves; The third connecting portion is provided with a plurality of second grooves spaced apart along the first direction on a side away from the battery cell, and the plurality of second grooves and the plurality of second channels are arranged alternately and spaced apart along the first direction; each of the second pads is embedded in one of the second grooves.

9. The battery pack of claim 2, wherein, The first connecting portion has at least one positioning hole, and the positioning hole penetrates through the first connecting portion along the second direction.

10. An electrical device, characterized by The battery pack includes the battery pack as claimed in any one of claims 1-9.

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