Connecting structure of battery pack, battery pack and electric equipment

Abstract

The utility model provides a connecting structure of a battery pack, the battery pack and electric equipment, and relates to the technical field of batteries, the connecting structure of the battery pack comprises a high-voltage connector used for being connected with a shell of the battery pack, and the high-voltage connector is provided with a first connecting part; the conducting bar is used for being electrically connected with a battery cell of the battery pack, a second connecting part is arranged on the conducting bar, and the second connecting part is clamped and matched with the first connecting part, so that the relative position between the conducting bar and the high-voltage connector is limited when the conducting bar is connected with the high-voltage connector in an inserting manner; therefore, the phenomenon of torsion attenuation at the joint of the conducting bar and the high-voltage connector is avoided, and the probability of arc generation is reduced.

Description

Technical Field

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

[0002] The battery pack connection structure is an important component of the power system that connects the battery pack to electrical equipment such as vehicles. It generally includes a high-voltage connector and a BDU (Battery Disconnect Unit busbar). The BDU busbar is located inside the battery pack housing. The high-voltage connector extends into the housing to connect with the BDU busbar, while the other part is located outside the housing for connection with the power system.

[0003] Currently, high-voltage connectors are typically fastened to the side beam of the housing and then connected to the BDU copper busbar via bolts. This connection method between the high-voltage connector and the BDU copper busbar is prone to arcing and other problems due to torque attenuation, which affects the performance of the battery pack. Utility Model Content

[0004] This application provides a connection structure for a battery pack, a battery pack, and an electrical device to improve the performance of the battery pack.

[0005] In a first aspect, this application provides a connection structure for a battery pack, comprising:

[0006] A high-voltage connector, which is used to connect to the housing of a battery pack, and is provided with a first connecting portion;

[0007] A conductive busbar is provided for electrical connection with the cells of the battery pack. The conductive busbar is provided with a second connecting part, which engages with the first connecting part to limit the relative position between the conductive busbar and the high-voltage connector when the conductive busbar is plugged into the high-voltage connector for electrical connection.

[0008] In some possible implementations, the high-voltage connector is provided with a mating slot, and one end of the mating slot is provided with a mating interface;

[0009] One end of the conductive busbar has a plug-in portion, which is inserted into the plug-in slot via the plug interface to electrically connect with the high-voltage connector.

[0010] In some possible implementations, the high-voltage connector is further provided with a limiting groove, which communicates with the insertion slot via the insertion interface, and the first connecting portion is located on the limiting groove.

[0011] In some possible implementations, the width of the limiting groove gradually decreases from the end away from the insertion interface to the insertion interface.

[0012] In some possible implementations, the conductive busbar includes a positive copper busbar and a negative copper busbar arranged side by side, and two limiting grooves and two plug-in portions are provided, each corresponding to one of the positive copper busbar and the one of the negative copper busbar.

[0013] In some possible implementations, the limiting groove is provided with sidewalls on both sides of the extending direction, and at least one of the two sidewalls of the limiting groove is provided with the first connecting part, and at least one of the opposite sides of the conductive busbar is provided with the second connecting part.

[0014] In some possible implementations, one of the first connecting portion and the second connecting portion is an elastic plug-in member, and the other is a slot that engages with the elastic plug-in member.

[0015] In some possible implementations, the resilient connector is a spring pin.

[0016] In some possible implementations, the resilient connector is a resilient snap-fit.

[0017] In some possible implementations, the elastic buckle includes a snap-fit ​​portion, the snap-fit ​​portion having an inclined first snap-fit ​​surface at least on the side opposite to the insertion slot, the shape of the slot being adapted to the shape of the snap-fit ​​portion, and the slot engaging with the snap-fit ​​portion.

[0018] In some possible implementations, the resilient connector further includes a main body connected to the limiting groove. The main body has a first guide surface at one end away from the insertion groove. The first guide surface is an inclined surface or an arc surface. The snap-fit ​​part is disposed on the main body and located between the first guide surface and the insertion groove.

[0019] In a second aspect, this application provides a battery pack, including a housing and a battery cell located within the housing, as well as a connection structure for the battery pack according to any one of the first aspects, wherein the connection structure is at least partially located within the housing and electrically connected to the battery cell.

[0020] Thirdly, this application provides an electrical device, including a device body and the battery pack described in the second aspect, wherein the battery pack is used to supply power to the device body.

[0021] The battery pack connection structure, battery pack, and electrical equipment provided in this application include a high-voltage connector and a conductive busbar. A first connecting part is provided on the high-voltage connector, and a second connecting part is provided on the conductive busbar. When the high-voltage connector and the conductive busbar are connected, the first connecting part and the second connecting part can be engaged to limit the connection between them, preventing them from disengaging. The engagement of the first and second connecting parts, compared to directly fixing the high-voltage connector and the conductive busbar with bolts, eliminates stress at the connection point, thus preventing torque attenuation and effectively reducing arcing and other problems, thereby significantly improving the performance of the battery pack. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0023] Figure 1 This is a partial structural diagram of the battery pack provided in an embodiment of this application;

[0024] Figure 2 for Figure 1 A magnified schematic diagram of the local structure;

[0025] Figure 3 A schematic diagram of the first state of the connection structure of the battery pack provided in the embodiments of this application;

[0026] Figure 4 This is a schematic diagram of the second state of the connection structure of the battery pack provided in the embodiments of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100 - Housing;

[0029] 200-cell;

[0030] 300 - Connection structure; 310 - High voltage connector; 311 - First connection part; 3111 - Snap-fit ​​part; 3112 - Main body part; 3113 - First guide surface; 312 - Insertion groove; 313 - Limiting groove; 320 - Conductive busbar; 321 - Second connection part; 322 - Insertion part.

[0031] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0033] First, let me explain the terms used in this application:

[0034] High-voltage connectors are used to connect battery cells in electrical equipment to components of the power system, ensuring safe, efficient, and reliable power transmission between the battery cells and the power system. High-voltage connectors typically consist of a housing, contacts, and an insulator. The housing is made of high-strength plastic or metal to provide protection and electrical insulation. The contacts are used for conductive connection to the BDU (Battery Unit Connector) of the battery pack or the connection to the power system, and must withstand high current and high voltage. The insulator isolates the contacts from each other and provides electrical insulation; it is usually made of a high-dielectric-strength material to prevent arcing and short circuits.

[0035] Battery packs are systems composed of multiple battery cells, widely used in electric vehicles, portable electronic devices, energy storage systems, and other electrical equipment requiring power. The design and structure of battery packs vary depending on the application, but typically include key components such as battery cells, a housing, busbars (BDUs), and high-voltage connectors. The battery cells and BDUs are located within the housing. Multiple cells are connected in series or parallel. The BDUs connect the battery cells, ensuring efficient current transmission, while the high-voltage connectors connect the BDUs to the electrical system of the device, ensuring safe and reliable power transmission.

[0036] Currently, the BDU copper busbar is typically connected to the contacts of the high-voltage connector for power transmission. At the same time, bolts are used to lock the BDU copper busbar and the high-voltage connector to prevent the natural connection between the BDU copper busbar and the high-voltage connector contacts from becoming loose.

[0037] Battery packs typically require specific current carrying capacity, which results in the BDU copper busbar having a certain thickness. Consequently, there are dimensional deviations in the thickness direction after assembly. This causes stress to always exist when the BDU copper busbar and high-voltage connector are connected by bolts. During the use of the battery pack, this can lead to torque attenuation and, in severe cases, arcing and other problems, seriously affecting the safety and stability of the battery pack.

[0038] To avoid the aforementioned problems, this application provides a battery pack connection structure in which the high-voltage connector and the conductive busbar are directly snapped together through the first connection part and the second connection part. This not only limits the position but also prevents problems such as arcing caused by stress at the connection point, thereby effectively improving the safety and stability of the battery pack.

[0039] It is understandable that the busbar here can be not only a BDU copper busbar, but also an aluminum busbar or other conductive structure made of conductive materials, as long as it can connect the high-voltage connector and the battery cell and effectively transmit power.

[0040] Meanwhile, the high-voltage connector of the battery pack can be used with various battery packs, as long as they have cells and a casing, such as blade batteries, cylindrical batteries, etc.

[0041] Battery packs can be used in a variety of electrical devices, including but not limited to electric vehicles, hybrid vehicles, energy storage systems, uninterruptible power supply systems, aviation equipment, power tools, and electric ships.

[0042] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0043] For some embodiments of this application, please refer to Figure 1 As shown, the battery pack includes a housing 100, a battery cell 200, and a connection structure 300.

[0044] The housing 100 generally includes structures such as a bottom protective plate, side beams, and crossbeams to form a frame that supports and accommodates the battery cell 200. The battery cell 200 is located inside the housing 100, and multiple battery cells 200 are generally provided. Multiple battery cells 200 are connected in series or in parallel to achieve the required current and voltage. The connection structure 300 is at least partially located inside the housing 100 to connect the battery cells 200. At the same time, the connection structure 300 is also used to connect to an external load for power transmission.

[0045] The specific structure of the connection structure 300 is detailed in the following embodiment.

[0046] For some embodiments of this application, please refer to Figure 2 , Figure 3 and Figure 4 As shown, the battery pack connection structure 300 includes a high-voltage connector 310 and a conductive bus 320, which are electrically connected by a plug-in connection.

[0047] The high-voltage connector 310 includes a housing for connecting to the housing 100 of the battery pack, for example by common methods such as bolting or welding.

[0048] For example, a special mounting hole is provided on the side beam of the housing 100. The high-voltage connector 310 extends into the housing 100 through the mounting hole, while the other part remains outside the housing 100 and is fixedly connected to the side beam by bolts. At the same time, the gap between the high-voltage connector 310 and the mounting hole can be sealed by components such as seals to prevent external harmful substances from damaging the battery cell 200.

[0049] It is understood that the high-voltage connector 310 can also be fixed in other positions of the housing 100 in other ways, such as being located entirely inside the housing 100, with only a plug hole provided on the housing 100, so that the part of the high-voltage connector 310 connected to the load extends into the plug hole. This embodiment does not limit this.

[0050] The conductive busbar 320 is electrically connected to the battery cell 200. It can be made of common materials such as copper, aluminum, brass, and bronze, and the specific material can be determined according to the usage requirements. When the conductive busbar 320 is a copper busbar, it can also be tin-plated or nickel-plated according to the usage requirements. This embodiment does not limit it.

[0051] For example, the busbar 320 includes a positive copper busbar and a negative copper busbar. The positive copper busbar connects the positive terminal of the battery cell 200 to the positive contact of the high-voltage connector 310, while the negative copper busbar connects the negative terminal of the battery cell 200 to the negative contact of the high-voltage connector 310.

[0052] The high-voltage connector 310 has a first connecting part 311 on its outer shell and a second connecting part 321 on its conductive busbar 320. The first connecting part 311 and the second connecting part 321 engage with each other. When the conductive busbar 320 is connected to the high-voltage connector 310, the first connecting part 311 and the second connecting part 321 engage to limit the relative position between the conductive busbar 320 and the high-voltage connector 310, preventing the high-voltage connector 310 and the conductive busbar 320 from losing contact during use, thereby ensuring the stability of power transmission.

[0053] Meanwhile, the high-voltage connector 310 and the conductive busbar 320 are limited by the first connecting part 311 and the second connecting part 321, thereby replacing the traditional bolt fixing. This avoids the problem of torque attenuation and can effectively reduce the probability of arcing and other problems, thereby effectively improving the safety and stability of the battery pack using the connection structure 300.

[0054] It is understandable that both the first connecting part 311 and the second connecting part 321 are insulating parts, so as not to affect the normal use of the conductive busbar 320 and the high-voltage connector 310.

[0055] In some embodiments of this application, the housing of the high-voltage connector 310 is provided with a mating groove 312, and one end of the mating groove 312 is provided with a mating interface. One end of the conductive bus 320 has a mating part 322, which is inserted into the mating groove 312 through the mating interface to electrically connect with the high-voltage connector 310.

[0056] The first connecting part 311 is provided outside the insertion slot 312, such as Figure 3 As shown, the first connecting part 311 and the insertion slot 312 are arranged sequentially along the X direction, that is, the direction in which the insertion part 322 is inserted into the insertion slot 312. When the insertion part 322 is inserted into the insertion slot 312, the first connecting part 311 can be engaged with the second connecting part 321 on the conductive busbar 320.

[0057] It is understandable that the first connecting part 311 can also be set inside the insertion slot 312, but relatively speaking, the first connecting part 311 is located outside the insertion slot 312, which makes it easier to process.

[0058] Furthermore, the housing of the high-voltage connector 310 is also provided with a limiting groove 313. The limiting groove 313 is connected to the plug-in part 322 via the plug interface. That is, the limiting groove 313 and the plug-in groove 312 are arranged sequentially along the X direction. The plug-in part 322 enters the plug-in groove 312 through the limiting groove 313. At this time, the first connecting part 311 is located on the limiting groove 313. After the plug-in part 322 is inserted into the plug-in groove 312, the conductive bus 320 is at least partially located in the limiting groove 313, and the first connecting part 311 and the second connecting part 321 are engaged.

[0059] Specifically, such as Figure 3 As shown, when the high-voltage connector 310 is separated from the conductive bus 320, the first connecting part 311 and the second connecting part 321 are separated and not snapped together. When it is necessary to connect the high-voltage connector 310 and the conductive bus 320, the plug part 322 is inserted into the plug groove 312 along the X direction through the limiting groove 313 and is electrically connected to the contacts in the plug groove 312. During the insertion of the plug portion 322 into the plug slot 312, the limiting groove 313 guides the conductive bus 320, facilitating the insertion of the plug portion 322 into the plug slot 312. After the plug portion 322 makes stable contact with the contact, the bottom of the conductive bus 320 contacts the limiting groove 313, which supports the conductive bus 320. Simultaneously, after the plug portion 322 makes stable contact with the contact, the first connecting portion 311 and the second connecting portion 321 engage, limiting the plug portion 322 and preventing it from dislodging from the plug slot 312. At this point, the connection state between the high-voltage connector 310 and the conductive bus 320 is as follows: Figure 4 As shown.

[0060] In addition, the limiting groove 313 is made of insulating material, such as plastic, and has an insulating effect. Therefore, by supporting the conductive busbar 320 through the limiting groove 313, the insulation effect can be improved and the interference of other components on the conductive busbar 320 can be reduced.

[0061] It is understandable that when the conductive busbar 320 includes a positive copper busbar and a negative copper busbar, the positive copper busbar and the negative copper busbar can be arranged side by side. Accordingly, two limiting slots 313 and two plug-in parts 322 are provided, and the two limiting slots 313 are arranged side by side. The positive copper busbar and the negative copper busbar can be inserted into the corresponding plug-in part 322 by passing through the corresponding limiting slot 313.

[0062] For example, such as Figure 3 As shown, a partition is provided between the two limiting grooves 313. The partition has a certain thickness to effectively separate the positive copper busbar and the negative copper busbar. The top of the limiting groove 313 is open to facilitate the installation of the first connecting part 311. The top, bottom and sides of the insertion groove 312 are closed. After the insertion part 322 is inserted into the insertion groove 312 from the insertion interface, it can prevent the insertion part 322 from moving in the Z and Y directions. The engagement of the first connecting part 311 and the second connecting part 321 prevents the conductive busbar 320 from moving in the X direction, thereby effectively limiting the relative position of the conductive busbar 320 and the high-voltage connector 310.

[0063] Understandably, by simply providing the insertion slot 312, the housing of the high-voltage connector 310 can have a support portion at the front end of the insertion interface of the insertion slot 312 to support the first connection portion 311.

[0064] Furthermore, the width of the limiting groove 313 can be made to gradually decrease from the end away from the insertion interface to the insertion interface, that is, the width of the limiting groove 313 gradually decreases along the X direction, thereby forming a trumpet-like structure, so that when the insertion part 322 is inserted into the insertion groove 312, it can enter the limiting groove 313 more easily, and its position is continuously corrected by the two side walls of the limiting groove 313, thereby making it easier for the insertion part 322 to be inserted into the insertion groove 312.

[0065] In some embodiments of this application, one of the first connecting portion 311 and the second connecting portion 321 is an elastic plug-in member, and the other is a slot that engages with the elastic plug-in member.

[0066] For example, a resilient plug is provided on the high-voltage connector 310, and the conductive bus 320 is provided with a slot at the position corresponding to the resilient plug.

[0067] For example, a resilient plug is provided on the conductive bus 320, and a slot is provided at the corresponding position on the high-voltage connector 310.

[0068] The placement of the first connecting part 311 and the second connecting part 321 on the high-voltage connector 310 and the conductive bus 320 can be selected according to the actual situation.

[0069] For example, the first connecting part 311 can be provided at the bottom of the limiting groove 313 in the Z direction, or connected to the side wall of the limiting groove 313 and then extended to the top of the limiting groove 313. In this case, the second connecting part 321 can be provided on the lower or upper surface of the conductive busbar 320.

[0070] For example, please see Figure 3 As shown, at least one side of the sidewalls of the limiting groove 313 extending along the X direction is provided with a first connecting part 311, and at least one side of the conductive busbar 320 is provided with a second connecting part 321.

[0071] The flexible connector is elastic and can snap into the slot on its own, making it convenient to use. Common elastic insulating materials such as plastic can be used for the flexible connector, and this embodiment does not impose any restrictions.

[0072] In some embodiments of this application, the resilient connector is a spring pin, that is, it includes a spring and a limiting pin, with the limiting pin connected to the spring.

[0073] Taking the spring pin set on the limiting groove 313 as an example, an installation groove can be opened on the groove wall of the limiting groove 313. The spring is located in the installation groove, and the limiting pin is at least partially located in the installation groove. When not compressed, at least part of it is outside the installation groove under the support of the spring. A slot adapted to the shape of the spring pin is provided on one side of the conductive bus 320. When the plug part 322 is inserted into the plug groove 312, the limiting pin is first pressed into the installation groove. When the slot and the limiting pin are opposite, the limiting pin is pushed into the slot by the spring, thereby limiting the relative position of the conductive bus 320 and the high voltage connector 310.

[0074] Understandably, the limiting pin can be provided with an inclined surface in the direction of the offset insertion groove 312. When the insertion part 322 moves along the X direction, it will automatically press the inclined surface into the mounting groove until it is opposite to the slot. Then, it will be pushed into the mounting groove by the spring to limit the insertion part 322 so that it will not come out of the insertion groove 312.

[0075] It is understandable that both the limit pin and the spring are insulating components.

[0076] In some embodiments of this application, the elastic connector is an elastic buckle, which can be directly disposed on the side wall of the limiting groove 313 extending in the X direction. When the groove and the elastic buckle are opposite, it can be directly inserted into the groove for limiting.

[0077] Furthermore, the elastic buckle includes a snap-fit ​​portion 3111, which engages with a slot. The snap-fit ​​portion 3111 has an inclined first snap-fit ​​surface on at least one side away from the insertion slot 312. The shape of the slot is adapted to the shape of the snap-fit ​​portion 3111, that is, at least one side of the slot has a second snap-fit ​​surface corresponding to the first snap-fit ​​surface, so that the snap-fit ​​portion 3111 can be snapped into the slot more easily.

[0078] For example, the first snap-fit ​​surface can be provided on both sides of the snap-fit ​​part 3111, so that the snap-fit ​​part forms a V-shaped structure, and the snap-fit ​​groove is also set as a V-shaped groove, making it easier for the snap-fit ​​part 3111 to snap into the snap-fit ​​groove. After the high-voltage connector 310 is removed from the housing 100, it is also easier to separate the conductive bus 320 and the high-voltage connector 310.

[0079] Additionally, please see Figure 3 and Figure 4 As shown, the elastic connector may also include a main body 3112, which is connected to a limiting groove 313. A first guide surface 3113 is provided at one end of the main body 3112 away from the insertion groove 312. The first guide surface 3113 is an inclined surface or an arc surface, so that the distance between the main body 3112 and the side wall of the limiting groove 313 on the opposite side gradually decreases along the X direction in the area where the first guide surface 3113 is located. The snap-fit ​​part 3111 is provided on the main body 3112 and is located between the first guide surface 3113 and the insertion groove 312.

[0080] Since the snap-fit ​​portion 3111 needs to snap into the slot on the conductive busbar 320, the snap-fit ​​portion 3111 will extend at least partially into the limiting slot 313. When the plug portion 322 is inserted into the plug slot 312, it will come into contact with the conductive busbar 320 and deform, so that the plug portion 322 can pass smoothly through the position of the elastic plug. The first guide surface 3113 on the main body portion 3112 can guide the busbar 320, making it easier for the conductive busbar 320 to push the elastic plug to deform.

[0081] In addition, for ease of processing, the main body 3112 can include a connecting section, a first guide arm and a second guide arm. The connecting section extends along the length of the limiting groove 313 and is fixed to the top of the side wall of the guide groove. The first guide arm and the second guide arm are arranged opposite to each other and are located at both ends of the connecting section. The first guide arm and the second guide arm are connected at the end opposite to the side wall of the limiting groove 313, and a V-shaped snap-fit ​​part 3111 is formed at the connection. A through hole is formed between the first guide arm and the second guide arm. In this case, it is more convenient to process the elastic snap-fit ​​part by injection molding.

[0082] Specifically, the first guide arm and the second guide arm may include a first connecting segment and a second connecting segment connected to each other. The end of the first connecting segment opposite to the second connecting segment is connected to the side wall of the limiting groove 313. The second connecting segment opposite to the first connecting segment has a bent portion that bends towards the other side wall of the limiting groove 313. The two bent ends of the first guide arm and the second guide arm are connected to form a snap-fit ​​portion 3111. The height of the limiting groove 313 in the Z direction is generally greater than the thickness of the conductive busbar 320. In this case, the upper surface of the side wall of the limiting groove 313 is located above the upper surface of the conductive busbar 320. At this time, both the first connecting segment and the second connecting segment can be tilted in the opposite direction of the Z direction. At the same time, the second connecting segment also extends along the X direction or in the opposite direction of the X direction, so that the ends of the first guide arm and the second guide arm are connected.

[0083] Understandably, the entire housing of the high-voltage connector 310 can be made of plastic. In this case, for ease of processing, the flexible connector and the housing can be integrally molded.

[0084] Of course, the outer shell and flexible connector can also be molded separately and then connected by welding, hot melting or other common methods.

[0085] This application also provides an electrical device, including a device body and a battery pack as described in the above embodiments, wherein the battery pack is used to supply power to the device body.

[0086] It is understood that electrical equipment includes, but is not limited to, electric vehicles, hybrid vehicles, energy storage systems, uninterruptible power supply systems, aviation equipment, power tools, and electric ships, as long as they require power supply from battery packs. This embodiment does not limit them.

[0087] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0088] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A connection structure (300) for a battery pack, characterized in that, include: A high-voltage connector (310) is used to connect to the housing (100) of the battery pack, and the high-voltage connector (310) is provided with a first connecting part (311); A conductive bus (320) is provided for electrical connection with the battery cell (200) of the battery pack. The conductive bus (320) is provided with a second connecting part (321), which engages with the first connecting part (311) to limit the relative position between the conductive bus (320) and the high-voltage connector (310) when the conductive bus (320) is plugged into the high-voltage connector (310) for electrical connection.

2. The battery pack connection structure (300) according to claim 1, characterized in that, The high-voltage connector (310) is provided with a plug groove (312), and one end of the plug groove (312) is provided with a plug interface; One end of the conductive bus (320) has a plug-in portion (322), which is inserted into the plug slot (312) through the plug interface to be electrically connected to the high voltage connector (310).

3. The battery pack connection structure (300) according to claim 2, characterized in that, The high-voltage connector (310) is also provided with a limiting groove (313), which is connected to the plug slot (312) via the plug interface, and the first connecting part (311) is located on the limiting groove (313).

4. The battery pack connection structure (300) according to claim 3, characterized in that, The width of the limiting groove (313) gradually decreases from the end away from the insertion interface to the insertion interface.

5. The battery pack connection structure (300) according to claim 3, characterized in that, The conductive bus (320) includes a positive copper bus and a negative copper bus arranged side by side. The limiting groove (313) and the plug-in part (322) are each provided in two, and correspond one-to-one with the positive copper bus and the negative copper bus.

6. The battery pack connection structure (300) according to any one of claims 3-5, characterized in that, The limiting groove (313) has sidewalls on both sides of the extending direction. At least one of the two sidewalls of the limiting groove (313) is provided with the first connecting part (311). At least one of the opposite sides of the conductive busbar (320) is provided with the second connecting part (321).

7. The battery pack connection structure (300) according to claim 6, characterized in that, One of the first connecting part (311) and the second connecting part (321) is an elastic plug-in, and the other is a slot that engages with the elastic plug-in.

8. The battery pack connection structure (300) according to claim 7, characterized in that, The elastic connector is a spring pin.

9. The battery pack connection structure (300) according to claim 7, characterized in that, The elastic connector is an elastic snap-fit.

10. The battery pack connection structure (300) according to claim 9, characterized in that, The elastic buckle includes a snap-fit ​​portion (3111), the snap-fit ​​portion (3111) having an inclined first snap-fit ​​surface at least on the side opposite to the insertion groove (312), the shape of the groove being adapted to the shape of the snap-fit ​​portion (3111), and the groove engaging with the snap-fit ​​portion (3111).

11. The battery pack connection structure (300) according to claim 10, characterized in that, The elastic connector further includes a main body (3112), which is connected to the limiting groove (313). A first guide surface (3113) is provided on one end of the main body (3112) away from the insertion groove (312). The first guide surface (3113) is an inclined surface or an arc surface. The snap-fit ​​part (3111) is provided on the main body (3112) and is located between the first guide surface (3113) and the insertion groove (312).

12. A battery pack, characterized in that, The battery pack includes a housing (100) and a battery cell (200) located within the housing (100), and a connection structure (300) for the battery pack according to any one of claims 1-11, wherein the connection structure (300) is at least partially located within the housing (100) and electrically connected to the battery cell (200).

13. An electrical appliance, characterized in that, It includes a device body and a battery pack as described in claim 12, the battery pack being used to power the device body.

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