Battery pack and electric device

Abstract

The utility model provides a battery pack and an electric device, and relates to the technical field of batteries. The battery pack comprises a box body, a plurality of battery monomers provided with pole columns, a plurality of busbars and a plurality of protective parts, the plurality of battery monomers are arranged in the box body, the busbar comprises a busbar piece and a plurality of connecting pieces, the busbar piece is connected with the connecting pieces, each connecting piece is connected with the pole columns of the two adjacent battery monomers, so that the two adjacent battery monomers are electrically connected, and the protective piece comprises a protective cover and a protective seat which are detachably connected. The protective cover and the protective seat are enclosed to form an accommodating space, the part of the pole, the part of the bus piece and at least part of the connecting piece are arranged in the accommodating space, the connecting piece comprises a first elastic clamping part, and the first elastic clamping part is clamped with the first limiting part of the pole. According to the battery pack provided by the invention, the problems of long time consumption and low safety in busbar installation are solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] Existing battery packs consist of multiple battery cells. When installing a busbar, it is necessary to either weld the busbar to the terminals of two adjacent battery cells or bolt the busbar to the terminals of two adjacent battery cells to achieve electrical connection between them. However, both welding and bolting methods suffer from time-consuming installation and low safety. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery pack and power supply device, which aims to solve the technical problems of long installation time and low safety of busbars.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a battery pack, comprising:

[0007] Box;

[0008] Multiple battery cells are disposed in the housing, each battery cell including a terminal post, and the terminal post is provided with a first limiting part;

[0009] Multiple busbars, each busbar including a bus element and multiple connectors, the bus element being connected to the connectors, and each connector being connected to the terminal of two adjacent battery cells to electrically connect the two adjacent battery cells;

[0010] Multiple protective components, each including a detachably connected protective cover and a protective seat, the protective cover and the protective seat forming a receiving space, a portion of the busbar and at least a portion of the connector being disposed within the receiving space, a portion of the pole being located within the receiving space, and the connector including a first elastic snap-fit ​​portion engaging with a first limiting portion.

[0011] In one embodiment of the first aspect, at least one of the protective cover and the protective seat is fixedly connected to the busbar.

[0012] In one embodiment of the first aspect, the connector further includes a plurality of elastic contact portions spaced circumferentially along the pole post, the elastic contact portions and the first elastic snap-fit ​​portion being arranged alternately, and the elastic contact portions abutting against the outer peripheral wall of the pole post.

[0013] In one embodiment of the first aspect, the battery pack has a third direction, the connector further includes a guide portion, the guide portion is connected to the busbar along the third direction near the pole post, the guide portion is connected along the third direction to the elastic contact portion and the first elastic snap-fit ​​portion, the guide portion is provided with a plug hole extending along the third direction, and the pole post is located in the plug hole.

[0014] In one embodiment of the first aspect, the elastic contact portion is an arc-shaped elastic arm, and multiple arc-shaped elastic arms are arranged along the circumference of the pole post. The side of the arc-shaped elastic arm near the pole post has a protrusion, and the protrusion abuts against the outer peripheral wall of the pole post.

[0015] In one embodiment of the first aspect, the first elastic snap-fit ​​portion is a snap fastener, and multiple snap fasteners are provided along the circumference of the pole post. The first limiting portion is a slot, and multiple slots are provided along the circumference of the pole post. Each snap fastener is located in one slot.

[0016] In one embodiment of the first aspect, the battery pack has a third direction, the battery cell further includes a cover plate, the terminal post passes through the cover plate, the protective seat includes a first protective part and a second protective part connected along the third direction, the first protective part is connected to the protective cover, the first protective part, the second protective part and the protective cover together define the receiving space, a portion of the connector passes through the first protective part, and the second protective part abuts against the cover plate along the third direction.

[0017] In one embodiment of the first aspect, the protective seat further includes a second limiting part connected to the first protective part, the second limiting part being located outside the receiving space, and the protective cover is provided with a second elastic snap-fit ​​part, the second elastic snap-fit ​​part being located outside the receiving space and snap-fitting with the second limiting part.

[0018] In one embodiment of the first aspect, the bus further includes an adapter and an insulating layer, wherein multiple bus members are provided, each of the connectors is connected to one of the bus members, the multiple bus members are connected sequentially through the adapter, the adapter portion is located outside the receiving space, and the insulating layer covers the adapter.

[0019] Secondly, embodiments of this application provide an electrical device including the battery pack described in any of the embodiments of the first aspect above.

[0020] The beneficial effects of this application are as follows:

[0021] The battery pack provided in this application, by configuring the protective components as detachable protective covers and protective seats, facilitates the placement of the busbar components within the accommodating space formed by the protective cover and protective seat. Installing the busbar to the terminal post via the protective components ensures the safety of the installer. Furthermore, during the installation of the busbar to the terminal post via the protective components, the first elastic locking part secures the busbar to the terminal post, preventing it from detaching and achieving electrical connection between adjacent battery cells. Compared to welding and bolting connections, the locking method is faster, thus improving the assembly efficiency of the busbar.

[0022] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A three-dimensional structural schematic diagram of a battery pack according to one embodiment of this application is shown;

[0025] Figure 2 It shows Figure 1 Enlarged structural diagram of region A in the middle;

[0026] Figure 3 This paper shows a three-dimensional exploded view of the bus component in one embodiment of the present application;

[0027] Figure 4 This invention provides a three-dimensional structural diagram of the bus assembly after the protective element is concealed in one embodiment of the present application.

[0028] Figure 5 A three-dimensional structural schematic diagram of the connector in one embodiment of this application is shown;

[0029] Figure 6 A three-dimensional structural schematic diagram of a battery cell in one embodiment of this application is shown;

[0030] Figure 7 It shows Figure 1 Schematic diagram of the cross-sectional structure at point BB;

[0031] Figure 8 It shows Figure 7 A magnified structural diagram of region D in the middle;

[0032] Figure 9 It shows Figure 1 A schematic diagram of the cross-sectional structure at the CC section;

[0033] Figure 10 It shows Figure 9 A magnified structural diagram of region F in the middle.

[0034] Explanation of key component symbols:

[0035] 1000 - Battery pack; 100 - Battery cell; 110 - Terminal post; 111 - Limiting part; 1111 - Slot; 120 - Cover plate; 200 - Busbar assembly; 210 - Protective component; 211 - Accommodating space; 212 - Protective cover; 2121 - Second elastic locking part; 213 - Protective base; 2131 - First protective part; 2132 - Second protective part; 2133 - Second limiting part; 220 - Busbar; 221- Busbar component; 222- Connector; 2221- Guide part; 22211- Plug-in hole; 2222- Elastic contact part; 22221- Arc-shaped elastic arm; 222213- Protrusion; 2223- First elastic snap-fit ​​part; 22231- Buckle; 223- Adapter; 224- Insulation layer; 300- Housing; X- First direction; Y- Second direction; Z- Third direction. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] Furthermore, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this application, the terms "first," "second," etc., are used to distinguish different objects and should not be construed as indicating or implying a specific order or hierarchy, or implicitly specifying the number of technical features indicated. Therefore, a feature marked "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0040] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In the description of this application, the term "and / or" indicates that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0042] In the description of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 80° to 90°, the two directions can be considered perpendicular; if the angle between two directions is 0° to 10°, the two directions can be considered parallel.

[0043] Existing battery packs consist of multiple battery cells. When installing a busbar, it is necessary to either weld the busbar to the terminals of two adjacent battery cells or bolt it to the terminals of two adjacent battery cells to achieve electrical connection between them. However, both welding and bolting methods involve time-consuming installations and low safety, respectively. The former requires welding equipment, and the latter requires tightening tools.

[0044] To address the aforementioned technical problems, in a first aspect, embodiments of this application provide a battery pack, relating to the field of battery technology, primarily used in electrical devices or energy storage devices.

[0045] For example, the aforementioned electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, new energy vehicles, etc. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles, etc. Spacecraft can be airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools can be metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. In addition, energy storage devices can be energy storage containers, energy storage power stations, etc. No specific restrictions are placed on the types of electrical devices and energy storage devices here.

[0046] like Figures 1 to 3 as well as Figure 6 As shown, the battery pack 1000 provided in this embodiment includes: a housing 300, multiple battery cells 100, multiple busbars 220, and multiple protective components 210.

[0047] The battery cell 100 is disposed within the housing 300. Each battery cell 100 includes a terminal post 110, which is provided with a first limiting part 111. The busbar 220 includes a bus member 221 and multiple connectors 222. The bus member 221 is connected to the connectors 222. Each connector 222 is connected to the terminal post 110 of two adjacent battery cells 100, so that the two adjacent battery cells 100 are electrically connected. The protective member 210 includes a detachably connected protective cover 212 and a protective seat 213. The protective cover 212 and the protective seat 213 enclose a receiving space 211. A portion of the bus member 221 and at least a portion of the connectors 222 are disposed within the receiving space 211. A portion of the terminal post 110 is located within the receiving space 211. The connector 222 includes a first elastic snap-fit ​​part 2223, which snaps into the first limiting part 111.

[0048] It should be noted that "each connector 222 is connected to the terminal 110 in two adjacent battery cells 100" can be understood as: there is a one-to-one correspondence between the connector 222 and the terminal 110, that is, each connector 222 corresponds to one terminal 110.

[0049] It is understood that the battery pack 1000 provided in this embodiment, by setting the protective member 210 as a detachable protective cover 212 and a protective base 213, facilitates the placement of the busbar 220's busbar component 221 into the receiving space 211 formed by the protective cover 212 and the protective base 213. The busbar 220 is then installed onto the terminal post 110 via the protective member 210, ensuring the safety of the installer. Simultaneously, during the installation of the busbar 220 onto the terminal post 110 via the protective member 210, the busbar 220 is secured to the terminal post 110 by the first elastic snap-fit ​​part 2223, preventing the busbar 220 from detaching from the terminal post 110 and achieving electrical connection between adjacent battery cells 100. Compared to welding and bolting, the snap-fit ​​installation method is faster, thus improving the assembly efficiency of the busbar 220.

[0050] like Figure 1 and Figure 2 As shown, it should be noted that in one embodiment, the battery pack 1000 may include multiple battery modules and multiple busbar assemblies 200, and have a first direction X, a second direction Y, and a third direction Z that are perpendicular to each other in pairs. Each busbar 200 includes a busbar 220 and a protective member 210. The multiple battery modules are arranged along the second direction Y, and each battery module includes multiple battery cells 100 arranged along the first direction X. Through the arrangement of the busbar 220, it can be used for electrical connection between two adjacent battery cells 100 in the same battery module, that is, to realize electrical connection between two adjacent battery cells 100 in each battery module. Of course, it can also be used for electrical connection between two adjacent battery cells 100 across battery modules, that is, to realize electrical connection between two adjacent battery modules.

[0051] In one embodiment, the protective cover 212 and / or the protective seat 213 are fixedly connected to the busbar 220, that is, at least one of the protective cover 212 and the protective seat 213 is fixedly connected to the busbar 220. This allows the protective cover 212 and the busbar 220 to become a whole, or the protective seat 213 and the busbar 220 to become a whole, or the protective cover 212, the protective seat 213 and the busbar 220 to become a whole, thereby enhancing the stability of the protective component 210 and the busbar 220.

[0052] It should be noted that "fixed connection" can be understood as: the relative positions of two objects remain unchanged under normal use conditions, that is, they will not easily separate or move relative to each other; for example, fixed connection can be injection molding, welding, bonding, etc., without specific limitations.

[0053] Of course, in the above embodiments, at least one of the protective cover 212 and the protective seat 213 can be detachably connected to the busbar 220, that is, the protective cover 212 and / or the protective seat 213 can be connected to the busbar 220 by assembly. Here, no specific limitation is made on the way the protective part 210 is connected to the busbar 220.

[0054] like Figure 1 , Figure 3 , Figure 7 and Figure 8 As shown, in one embodiment, the connector 222 further includes a plurality of elastic contact portions 2222 spaced apart along the circumference of the pole post 110. The elastic contact portions 2222 and the first elastic snap-fit ​​portion 2223 are arranged alternately, and the elastic contact portions 2222 abut against the outer peripheral wall of the pole post 110.

[0055] For example, the contact between the elastic contact portion 2222 and the outer peripheral wall of the pole post 110 can be a point contact, a line contact, a surface contact, etc., without any specific limitations.

[0056] Understandably, by abutting the elastic contact portion 2222 against the outer peripheral wall of the terminal post 110, the busbar 220 can be matched with terminal posts 110 of different diameters, and the busbar 220 can also be better positioned. Furthermore, the elastic contact portion 2222 abutting against the outer peripheral wall of the terminal post 110 achieves elastic contact, which can increase the stability of the electrical connection between two adjacent battery cells 100.

[0057] like Figure 1 , Figure 3 and Figure 6 As shown, the battery pack 1000 further has a third direction Z, and the connector 222 also includes a guide portion 2221. The guide portion 2221 is connected to the side of the busbar 221 near the terminal post 110 along the third direction Z. The guide portion 2221 is connected to the elastic contact portion 2222 and the first elastic snap-fit ​​portion 2223 along the third direction Z. The guide portion 2221 is provided with a plug hole 22211 that extends through the third direction Z, and the terminal post 110 is located in the plug hole 22211.

[0058] Therefore, the guide portion 2221 is slidably connected to the pole post 110 along the third direction Z via the insertion hole 22211. When the guide portion 2221 slides to a preset position along the third direction Z via the insertion hole 22211, the first elastic locking portion 2223 engages with the first limiting portion 111. This can be understood as the guide portion 2221 playing a guiding role during the installation of the busbar 220 (guiding the first elastic locking portion 2223 to smoothly engage with the first limiting portion 111), thus improving the assembly efficiency of the busbar 220. Simultaneously, as... Figures 7 to 10 As shown, the guide portion 2221 is arranged around the pole post 110 through the insertion hole 22211 to shield the pole post 110, which can prevent the outer peripheral wall of the pole post 110 from being exposed to the external environment, reduce the risk of the installer coming into contact with the pole post 110, and further ensure the safety of the installer.

[0059] like Figure 4 and Figure 5 As shown, the elastic contact portion 2222 is further defined as an arc-shaped elastic arm 22221. Multiple arc-shaped elastic arms 22221 are provided along the circumference of the pole post 110. The side of the arc-shaped elastic arm 22221 near the pole post 110 has a protrusion 222213, which abuts against the outer peripheral wall of the pole post 110.

[0060] It is understandable that, since the arc-shaped elastic arm 22221 is used as the elastic contact part 2222, the arc-shaped elastic arm 22221 can generate elastic force, so that the protrusion 222213 is in stable contact with the outer peripheral wall of the pole post 110, thereby achieving a more stable electrical connection between the busbar 220 and the pole post 110.

[0061] Of course, in the above embodiment, the elastic contact 2222 can also be a spring sheet, with the side of the spring sheet away from the busbar 221 contacting the outer peripheral wall of the pole post 110. Stable electrical connection can also be achieved by relying on elastic force. Here, no specific restrictions are placed on the structure of the elastic contact 2222.

[0062] It should be noted that, in addition to using the insertion hole 22211 to achieve the sliding connection between the guide part 2221 and the pole post 110 along the third direction Z, the guide part 2221 can also be provided with a strip-shaped slider extending along the third direction Z, and the pole post 110 can be provided with a strip-shaped groove extending along the third direction Z. The strip-shaped slider is disposed in the strip-shaped groove, which can also achieve the sliding connection between the guide part 2221 and the pole post 110 along the third direction Z. No specific restrictions are placed on the way the guide part 2221 and the pole post 110 slide to connect.

[0063] like Figure 4 and Figure 5As shown, in one embodiment, the first elastic snap-fit ​​portion 2223 is a snap fastener 22231, and multiple snap fasteners 22231 are provided along the circumference of the pole post 110. The first limiting portion 111 is a slot 1111, and multiple slots 1111 are provided along the circumference of the pole post 110. Each snap fastener 22231 is located in a slot 1111.

[0064] It should be noted that "each buckle 22231 is located in a slot 1111" can be understood as: there is a one-to-one correspondence between the buckles 22231 and the slots 1111, that is, each buckle 22231 corresponds to one slot 1111.

[0065] Understandably, the interlocking of the buckle 22231 and the slot 1111 achieves the snap-fit ​​connection between the busbar 220 and the pole post 110. Compared with welding and bolt connection, snap-fit ​​connection can effectively shorten the assembly time of the busbar 220.

[0066] In another embodiment, the first elastic snap-fit ​​part 2223 is a first hook, and the first limiting part 111 is a second hook. The first hook and the second hook engage with each other, which can also realize the snap-fit ​​between the busbar 220 and the pole post 110. Here, no specific restrictions are made on the structure of the first elastic snap-fit ​​part 2223 and the first limiting part 111.

[0067] like Figure 1 , Figure 3 as well as Figures 6 to 8 As shown, in one embodiment, the battery pack 1000 has a third direction Z, the battery cell 100 also includes a cover plate 120, the terminal post 110 passes through the cover plate 120, the protective seat 213 includes a first protective part 2131 and a second protective part 2132 connected along the third direction Z, the first protective part 2131 is connected to the protective cover 212, the first protective part 2131, the second protective part 2132 and the protective cover 212 together define an accommodating space 211, a part of the connector 222 is disposed through the first protective part 2131, the second protective part 2132 is disposed around the connector 222, and the second protective part 2132 abuts against the cover plate 120 along the third direction Z.

[0068] Understandably, by having the second protective part 2132 abut against the cover plate 120 along the third direction Z, the contact between the connector 222 and the cover plate 120 can be restricted, thus achieving electrical insulation between the cover plate 120 and the busbar 220, thereby reducing the possibility of short circuit.

[0069] like Figure 3As shown, the protective base 213 further includes a second limiting part 2133 connected to the first protective part 2131. The second limiting part 2133 is located outside the receiving space 211. The protective cover 212 is provided with a second elastic snap-fit ​​part 2121. The second elastic snap-fit ​​part 2121 is located outside the receiving space 211 and snaps into the second limiting part 2133, so that the protective base 213 and the protective cover 212 can be detachably connected, thereby facilitating the disassembly of the busbar 220 when maintaining the battery pack 1000.

[0070] For example, the second elastic snap-fit ​​portion 2121 is a connecting plate with a slot, and the second limiting portion 2133 is a limiting block that can engage with the slot; of course, the second elastic snap-fit ​​portion 2121 can also be a first hook, and the second limiting portion 2133 can be a second hook that engages with the first hook. Here, no specific restrictions are placed on the structure of the second elastic snap-fit ​​portion 2121 and the second limiting portion 2133.

[0071] like Figure 1 , Figure 7 and Figure 8 As shown, in one embodiment, the busbar 220 further includes an adapter 223 and an insulating layer 224. Multiple busbars 221 are provided, and each connector 222 is connected to one busbar 221. Multiple busbars 221 are connected in sequence through the adapter 223. The adapter 223 is partially located outside the receiving space 211, and the insulating layer 224 covers the adapter 223.

[0072] It should be noted that "each connector 222 is connected to one busbar 221" can be understood as: there is a one-to-one correspondence between the connectors 222 and the busbars 221, that is, each connector 222 corresponds to one busbar 221. "Multiple busbars 221 are connected sequentially through adapters 223" can be understood as: adjacent two busbars 221 are connected through adapters 223.

[0073] For example, the material of the insulating layer 224 can be silicone, rubber, plastic, etc., without specific limitations.

[0074] Understandably, by covering the adapter 223 with an insulating layer 224, insulation can be provided to reduce the risk of electric shock to installers when installing the busbar 220, thus further ensuring the safety of the installers.

[0075] In summary, in the battery pack 1000 provided in this embodiment, the process of connecting each busbar 220 to a terminal post 110 is as follows: the installer moves the busbar 220 along the third direction Z towards the terminal post 110, so that the terminal post 110 passes through the insertion hole 22211 and the elastic contact part 2222 abuts against the outer peripheral wall of the terminal post 110. When the guide part 2221 slides along the terminal post 110 to a preset position in the third direction Z, the first elastic locking part 2223 engages with the first limiting part 111, so that the busbar 220 is electrically connected to the terminal post 110 through the first elastic locking part 2223 and the elastic contact part 2222. At the same time, the second protective part 2132 abuts against the cover plate 120 to prevent the first elastic locking part 2223 and the elastic contact part 2222 from contacting the cover plate 120 and causing a short circuit.

[0076] Secondly, embodiments of this application provide an electrical device including the battery pack 1000 in any of the embodiments of the first aspect described above.

[0077] It is understood that since the power supply device provided in this embodiment has the battery pack 1000 in any of the embodiments of the first aspect described above, it has all the beneficial effects of the battery pack 1000, which will not be described in detail here.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery pack, characterized by, The battery pack comprises: a box (300); a plurality of battery monomers (100) arranged in the box (300), the battery monomer (100) comprising a pole (110) provided with a first limiting part (111); a plurality of busbars (220), the busbar (220) comprising a busbar member (221) and a plurality of connecting members (222), the busbar member (221) being connected with the connecting member (222), each connecting member (222) being connected with the pole (110) in the adjacent two battery monomers (100) to electrically connect the adjacent two battery monomers (100); a plurality of protection members (210), the protection member (210) comprising a detachable protection cover (212) and a protection seat (213), the protection cover (212) and the protection seat (213) enclosing a containing space (211), part of the busbar member (221) and at least part of the connecting member (222) being arranged in the containing space (211), part of the pole (110) being located in the containing space (211), the connecting member (222) comprising a first elastic clamping part (2223), the first elastic clamping part (2223) being clamped with the first limiting part (111).

2. The battery pack of claim 1, wherein, At least one of the protection cover (212) and the protection seat (213) is fixedly connected with the busbar (220).

3. The battery pack of claim 1, wherein, The connecting member (222) further comprises a plurality of elastic contact parts (2222) arranged along the circumference of the pole (110), the elastic contact part (2222) and the first elastic clamping part (2223) being staggered, the elastic contact part (2222) abutting against the outer circumferential wall of the pole (110).

4. The battery pack of claim 3, wherein, The battery pack has a third direction (Z), the connecting member (222) further comprising a guide part (2221), the guide part (2221) being connected with the busbar member (221) on the side close to the pole (110) along the third direction (Z), the guide part (2221) being connected with the elastic contact part (2222) and the first elastic clamping part (2223) along the third direction (Z), the guide part (2221) being provided with a plug hole (22211) penetrating along the third direction (Z), the pole (110) being located in the plug hole (22211).

5. The battery pack of claim 4, wherein, The elastic contact part (2222) is an arc-shaped elastic arm (22221), a plurality of arc-shaped elastic arms (22221) being arranged along the circumference of the pole (110), the arc-shaped elastic arm (22221) on the side close to the pole (110) having a protrusion (222213), the protrusion (222213) abutting against the outer circumferential wall of the pole (110).

6. The battery pack of any one of claims 1-5, wherein, The first elastic clamping part (2223) is a buckle (22231), a plurality of buckles (22231) are arranged along the circumference of the pole (110), the first limiting part (111) is a clamping groove (1111), a plurality of clamping grooves (1111) are arranged along the circumference of the pole (110), and each buckle (22231) is located in a clamping groove (1111).

7. The battery pack of any one of claims 1-5, wherein, The battery pack has a third direction (Z), the battery monomer (100) further includes a cover plate (120), the pole (110) passes through the cover plate (120), the protection seat (213) includes a first protection part (2131) and a second protection part (2132) connected along the third direction (Z), the first protection part (2131) is connected with the protection cover (212), the first protection part (2131), the second protection part (2132) and the protection cover (212) jointly define the containing space (211), a part of the connecting piece (222) passes through the first protection part (2131) and is arranged, the second protection part (2132) surrounds the connecting piece (222) and is arranged, and the second protection part (2132) abuts against the cover plate (120) along the third direction (Z).

8. The battery pack of claim 7, wherein, The protection seat (213) further includes a second limiting part (2133) connected with the first protection part (2131), the second limiting part (2133) is located outside the containing space (211), the protection cover (212) is provided with a second elastic clamping part (2121), the second elastic clamping part (2121) is located outside the containing space (211) and is clamped with the second limiting part (2133).

9. The battery pack of any one of claims 1-5, wherein, The busbar (220) further includes a conversion piece (223) and an insulating layer (224), the busbar (220) is provided with a plurality of busbars (221), each connecting piece (222) is connected with a busbar (221), a plurality of busbars (221) are connected in sequence through the conversion piece (223), the conversion piece (223) is partially located outside the containing space (211), and the insulating layer (224) is coated outside the conversion piece (223).

10. An electrical device, characterized by The battery pack of any one of claims 1 to 9. The battery pack of any one of claims 1 to 9.

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