Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises an end plate, a battery monomer, an output electrode and an output electrode base, the plurality of battery monomers are arranged along a first direction, the end plate is arranged at at least one end of the plurality of battery monomers in the first direction, the output electrode is electrically connected with one of the battery monomers, the output electrode base comprises a base body and an extension structure, the base body is mounted on the end plate, and the output electrode is mounted on the base body; one end of the extension structure is connected to the surface of the seat body and located on a creepage path between the output electrode and the end plate, and the extension structure and the output electrode are arranged at an interval and the extension structure and the end plate are arranged at an interval. One end of the extension structure is connected to the surface of the base body and located on the creepage path between the output electrode and the end plate, a new creepage path passes through the surface of the base body, the creepage distance is increased, and the risk of insulation failure caused by enrichment of electrolyte on the surface of the base of the output electrode under thermal runaway of the battery is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a battery device and electrical equipment. Background Art

[0002] In existing battery devices, after a battery cell experiences thermal runaway, electrolyte vapor condenses and accumulates on the surface of the output pole base, shortening the creepage distance between the output pole and the end plate, which can easily lead to insulation failure between the output pole and the end plate. Utility Model Content

[0003] The main purpose of the present application is to propose a battery device and electrical equipment, aiming to solve the technical problem that the existing electrolyte vapor is condensed and enriched on the surface of the output electrode base, resulting in insulation failure between the output electrode and the end plate.

[0004] To achieve the above-mentioned purpose, according to some embodiments of the present application, the present application provides a battery device, including an end plate, a battery cell, an output pole and an output pole base; a plurality of the battery cells are arranged along a first direction, the end plate is arranged at at least one end of the plurality of the battery cells in the first direction, the output pole is electrically connected to one of the battery cells, the output pole base includes a seat body and an extension structure, the seat body is installed on the end plate, and the output pole is installed on the seat body; one end of the extension structure is connected to the surface of the seat body and is located on the creepage path between the output pole and the end plate, the extension structure is spaced apart from the output pole, and the extension structure is spaced apart from the end plate.

[0005] One end of the extension structure is connected to the surface of the base body and is located on the creepage path between the output pole and the end plate. The new creepage path not only passes through the surface of the base body, but also needs to pass through the surface of the extension structure when encountering the extension structure. The new creepage path is increased, that is, the creepage distance is increased, and by setting a gap between the extension structure and the output pole, and setting a gap between the extension structure and the end plate, it is possible to avoid the creepage path from directly from the output pole to the extension structure, or directly to the end plate after passing through the extension structure, thereby ensuring that the creepage distance can be increased and reducing the risk of electrolyte enrichment on the surface of the output pole base causing insulation failure of the output pole and the end plate under thermal runaway of the battery.

[0006] In some embodiments, the seat body includes a front side facing the battery cell, a rear side disposed opposite to the front side, and a left side and a right side respectively connecting the front side and the rear side;

[0007] The extension structure is arranged on the rear side; and / or,

[0008] The extension structure is arranged on the left side; and / or,

[0009] The extension structure is arranged on the right side.

[0010] By not arranging the extension structure on the side facing the battery cell, the risk of the extension structure contacting the output pole can be reduced, and it is also beneficial to reduce the volume of the battery device.

[0011] In some embodiments, a mounting groove is provided on the end plate, the seat body includes a connecting member and a mounting member, the connecting member is installed in the mounting groove; one side of the mounting member is connected to the connecting member, and the other side of the mounting member is used to install the output pole; the extension structure is arranged on the surface of the mounting member or the connecting member.

[0012] By setting a mounting groove on the end plate for installing a connector, the mounting member is connected to the battery cell through the output pole, and the extension structure can be set on the surface of the connector or on the surface of the mounting member to increase the creepage distance between the output pole and the end plate.

[0013] In some embodiments, the mounting member includes a bottom plate and a side plate, the bottom plate is connected to the connecting member, and a side of the bottom plate away from the connecting member is used to mount the output pole; the side plate is arranged on a side of the bottom plate away from the connecting member and is arranged around at least a portion of the periphery of the output pole;

[0014] The extension structure is arranged on the bottom plate, and the extension structure and the connecting member are spaced apart.

[0015] By arranging an extension structure on the bottom plate, the creepage distance from the output pole to the end plate can be increased, and the manufacturing is convenient.

[0016] In some embodiments, the extension structure includes an extension plate, which extends from the bottom plate toward a side away from the side plate; the extension plate is perpendicular to the bottom plate; or the extension plate is arranged at an acute angle to the bottom plate; or the extension plate is arranged at an obtuse angle to the bottom plate.

[0017] By setting up an extension structure including an extension plate, the extension plate extends toward the side away from the side plate, which is not only convenient to manufacture, but also adds a path on the surface of the extension plate in the creepage path from the output pole to the end plate, thereby increasing the creepage distance between the output pole and the end plate and reducing the risk of insulation failure that may be caused by thermal runaway of the battery.

[0018] In some embodiments, the side panel and the extension panel are located in the same plane and are integrally formed.

[0019] By forming the side panels and the extension panels as one piece, the manufacturing difficulty is reduced, the process steps are simplified, and the production efficiency is improved.

[0020] In some embodiments, the extension structure further includes a first extending section disposed on the extension plate, the first extending section is disposed on a creepage path from the output pole to the end plate, and the first extending section is spaced apart from the connector.

[0021] By arranging a first extension section on the extension plate, and arranging the first extension section on the creepage path between the output pole and the end plate, and arranging a gap between the first extension section and the connecting piece to avoid direct contact as much as possible, the creepage distance can be further increased on the basis of setting the extension plate, thereby reducing the short circuit risk caused by electrolyte enrichment on the surface of the output pole base under thermal runaway of the battery.

[0022] In some embodiments, the first extending section is disposed on a side of the extension plate facing the connecting member, and extends toward the connecting member.

[0023] By arranging the first extension section on the side of the extension plate facing the connector, that is, the inner side, the internal space of the output pole base is fully utilized without occupying too much space in the battery module, which is beneficial to reducing the volume of the battery while reducing the risk of insulation failure.

[0024] In some embodiments, there are multiple first extending sections, and the multiple first extending sections are arranged at intervals along a second direction, and the second direction is the extension direction of the extension plate.

[0025] By setting the number of first extending sections to be multiple and arranging the multiple first extending sections at intervals, the length of the creepage path can be further increased, that is, the creepage distance is increased, which is beneficial to reducing the risk of insulation failure.

[0026] In some embodiments, the extension structure further includes a second extending section disposed on the bottom plate, the second extending section is disposed on a side of the bottom plate away from the side plate, and a gap is disposed between the second extending section and the connecting member.

[0027] By setting a second extension section on the bottom plate, the second extension section is set on the side of the bottom plate away from the side plate. When the electrolyte condenses or settles on the side of the bottom plate away from the side plate, that is, the bottom surface of the bottom plate, or condenses on the second extension section, the electrolyte is easy to fall under the action of gravity, so that the electrolyte is not easy to gather, reducing the risk of short circuit. The second extension section is set at intervals, which means that there is a spacing between two adjacent second extension sections, and the creepage path needs to pass through the surface of each second extension section and the gap between the two. The spacing of multiple second extension sections can increase the creepage distance, thereby reducing the risk of short circuit caused by electrolyte enrichment on the surface of the output pole base under thermal runaway of the battery.

[0028] In some embodiments, the number of the second extension segments is multiple, and the multiple second extension segments are spaced apart along a third direction, and the third direction is perpendicular to the first direction. The second extension segments are spaced apart, which means that there is a gap between two adjacent second extension segments, and the creepage path needs to pass through the surface of each second extension segment and the gap between the two.

[0029] By setting the number of the second extending sections to be multiple and arranging the multiple second extending sections at intervals, the length of the creepage path can be further increased, that is, the creepage distance is increased, which is beneficial to reducing the risk of insulation failure.

[0030] In some embodiments, the bottom plate is provided with a receiving groove, the connecting member is installed in the receiving groove, and the extension structure includes a third extending section provided on the outer side surface of the bottom plate.

[0031] By providing a third extension section on the side of the bottom plate, the creepage distance between the output pole and the end plate can also be increased, thereby reducing the risk of insulation failure caused by electrolyte enrichment on the surface of the output pole base during battery thermal runaway.

[0032] In some embodiments, the third extension section extends in a direction away from the connecting member.

[0033] By arranging the third extending section to extend in a direction away from the connecting member, the possibility of direct contact between the third extending section and the connecting member is reduced, thereby further reducing the risk of insulation failure.

[0034] In some embodiments, the third extending section is extended along a third direction, and the third direction is perpendicular to the first direction; or, the third extending section is extended toward the end plate, and the third extending section is spaced apart from the end plate.

[0035] By setting the third extension section to extend horizontally, the creepage distance between the output pole and the end plate can be increased. In addition, by setting the third extension section to extend downward, the electrolyte can flow under its own gravity, reducing the enrichment of the electrolyte and thus reducing the risk of insulation failure.

[0036] In some embodiments, there are multiple third extending sections, and the multiple third extending sections are arranged at intervals along the height direction of the bottom plate.

[0037] By setting the number of the third extending sections to be multiple and arranging the multiple third extending sections at intervals along the height direction of the base plate, the length of the creepage path can be further increased, that is, the creepage distance is increased, which is beneficial to reducing the risk of insulation failure.

[0038] In some embodiments, the extension structure includes a fourth extending section disposed on the connecting member, and the fourth extending section is spaced apart from the mounting member and the end plate, respectively.

[0039] The fourth extension section is provided on the connector to increase the distance between the output pole and the end plate, thereby reducing the risk of insulation failure caused by the enrichment of electrolyte on the surface of the output pole base.

[0040] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0042] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0043] Figure 2 A schematic diagram of the exploded structure of a battery pack according to some embodiments of the present application;

[0044] Figure 3 A schematic diagram of the structure of a battery module of a battery pack of some embodiments of the present application;

[0045] Figure 4 for Figure 3 A partial structural diagram of

[0046] Figure 5 A schematic diagram of the structure of the output pole base of some embodiments of the present application;

[0047] Figure 6 Another structural schematic diagram of the output pole base of some embodiments of the present application;

[0048] Figure 7 Another structural schematic diagram of the output pole base of some embodiments of the present application;

[0049] Figure 8 Another structural schematic diagram of the output pole base of some embodiments of the present application;

[0050] Fig. 9 for Figure 8 A schematic diagram of the enlarged structure at A;

[0051] Fig.10 Another structural schematic diagram of the output pole base of some embodiments of the present application;

[0052] Fig.11 for Fig.10 A schematic diagram of the enlarged structure at B;

[0053] Fig.12 Another structural schematic diagram of the output pole base of some embodiments of the present application;

[0054] Fig.13 for Fig.12 Schematic diagram of the partial decomposition structure;

[0055] Fig.14 Another structural schematic diagram of the output pole base of some embodiments of the present application;

[0056] Fig.15 Another structural schematic diagram of the output pole base of some embodiments of the present application.

[0057] Description of Figure Numbers:

[0058] 1000. Vehicles;

[0059] 100, battery pack; 200, controller; 300, motor;

[0060] 10. Box body; 11. Upper cover; 12. Bottom box; 20. Battery module; 21. End plate; 22. Battery cell; 23. Output pole; 24. Output pole base; 25. Module bar;

[0061] 1. First groove; 2. Second groove; 3. Seat body; 31. Connector; 32. Mounting member; 321. Bottom plate; 3211. Accommodating groove; 3212. Outer side surface; 322. Side plate; 4. Extension structure; 41. Extension plate; 42. First extension section; 43. Third extension section; 44. Fourth extension section; 45. Second extension section.

[0062] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in this embodiment to clearly and completely describe the technical solution in this embodiment. Obviously, the described embodiment is only a part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0064] It should be noted that all directional indications in this embodiment (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0065] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0066] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0068] The descriptions of directions such as "up", "down", "front", "back", "left" and "right" in this application are based on the directions shown in the figure and are only used to explain the relative position relationship between the components in the posture shown in the figure. If the specific posture changes, the directional indication will also change accordingly.

[0069] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0070] The battery device includes a plurality of battery cells, an output pole base and an output pole, the output pole base is mounted on an end plate, and the end plate is an end plate. The output pole base is made of insulating material and plays an insulating role. However, after the battery thermal runaway, it is easy to cause the output pole base insulation failure.

[0071] After careful research, the applicant found that after the battery thermal runaway, the electrolyte vapor condenses and accumulates on the surface of the output pole base, shortening the creepage distance between the output pole and the end plate, resulting in insulation failure.

[0072] To this end, the present application provides a battery and an electrical device.

[0073] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The electrical equipment may be a vehicle 1000, and the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery pack 100 is provided inside the vehicle 1000, and the battery pack 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery pack 100 may be used to power the vehicle 1000, for example, the battery pack 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery pack 100 to power the motor 300, for example, for the starting, navigation and driving power requirements of the vehicle 1000.

[0074] In some embodiments of the present application, the battery pack 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0075] Please refer to Figure 2 , Figure 2Schematic diagram of the exploded structure of a battery pack 100 provided for some embodiments of the present application. The battery pack 100 includes a case 10 and a battery module 20, wherein the battery module 20 includes a plurality of battery cells 22, and the battery cells 22 are contained in the case 10. Among them, the case 10 is used to provide a storage space for the battery cells 22, and the case 10 can adopt a variety of structures. In some embodiments, the case 10 may include an upper cover 11 and a bottom box 12, wherein the upper cover 11 and the bottom box 12 cover each other, and the upper cover 11 and the bottom box 12 jointly define a storage space for accommodating the battery cells 22. The bottom box 12 may be a hollow structure with one end open, and the upper cover 11 may be a plate-like structure, and the upper cover 11 covers the open side of the bottom box 12, so that the upper cover 11 and the bottom box 12 jointly define a storage space; the upper cover 11 and the bottom box 12 may also be hollow structures with one side open, and the open side of the upper cover 11 covers the open side of the bottom box 12. Of course, the box body 10 formed by the upper cover 11 and the bottom box 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0076] In the battery pack 100, there can be multiple battery cells 22, and the multiple battery cells 22 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 22 are both connected in series and in parallel. The multiple battery cells 22 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 22 is accommodated in the box 10; of course, the battery pack 100 can also be a battery module formed by connecting multiple battery cells 22 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery pack 100 can also include other structures, for example, the battery pack 100 can also include a busbar component for realizing electrical connection between the multiple battery cells 22.

[0077] Each battery cell 22 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 22 may be cylindrical, flat, rectangular, or in other shapes.

[0078] Reference Figure 3-Figure 5 According to some embodiments of the present application, the present application provides a battery device, including an end plate 21, a plurality of battery cells 22, an output pole 23 and an output pole base 24; the plurality of battery cells 22 are arranged along a first direction, the end plate 21 is arranged at at least one end of the plurality of battery cells 22 in the first direction, the output pole 23 is electrically connected to one of the battery cells 22, the output pole base 24 includes a seat body 3 and an extension structure 4, the seat body 3 is mounted on the end plate 21, the output pole 23 is mounted on the seat body 3, one end of the extension structure 4 is connected to the surface of the seat body 3, and is located on the creepage path between the output pole 23 and the end plate 21, the extension structure 4 is spaced apart from the output pole 23, and the extension structure 4 is spaced apart from the end plate 21.

[0079] It should be noted that the output pole 23 here can be a conductive bar, and the battery device can be a battery module 20 including a plurality of battery cells 22, or a battery pack 100, and the battery pack 100 includes a box 10 and a plurality of battery cells 22 arranged in the box 10. The creepage distance is the shortest path between two conductive parts or between a conductive part and a device protection interface measured along the surface of an insulator. Specifically, in the present application, the seat body 3 of the output pole base 24 is an insulator, and the two conductive parts are the output pole 23 and the end plate 21. The creepage distance refers to the shortest path between the output pole 23 and the end plate 21 measured along the surface of the output pole base 24. Here, the shortest path is the creepage path described in the present application. One end of the extension structure 4 is connected to the surface of the seat body 3, and the other end is spaced apart from the seat body 3 and is located on the creepage path between the output pole 23 and the end plate 21. When the extension structure 4 is not provided, the creepage path is from the output pole 23 through the surface of the seat body 3 to the end plate 21. After the extension structure 4 is provided, since the extension structure 4 is provided on the surface of the seat body 3 and is located on the creepage path, the new creepage path not only needs to pass through the surface of the seat body 3, but also needs to pass through the surface of the extension structure 4 when encountering the extension structure 4, so that the creepage path is increased, that is, the creepage distance between the output pole 23 and the end plate 21 is increased. Due to the increase in the creepage distance, when the battery pack 100 is in a thermal runaway state, when the electrolyte is enriched on the surface of the output pole base 24, it is not easy to cause insulation failure.

[0080] In addition, there are intervals between the extension structure 4 and the output pole 23, and between the extension structure 4 and the end plate 21. The interval here can also be said to be a gap, which is to explain that the extension structure 4 and the output pole 23 are not in direct contact, and the extension structure 4 and the end plate 21 are not in direct contact, because direct contact may not play a role in reducing the creepage distance. For example, if the output pole 23 is in direct contact with the extension structure 4, the creepage path becomes the output pole 23-extension structure 4-seat body 3-end plate 21. After the output pole 23 is in direct contact with the extension structure 4, the creepage path directly goes from the output pole 23 to the extension structure 4. Although the setting of the extension structure 4 will increase the creepage path, due to the direct contact with the extension structure 4, a part of the creepage path that originally passed through the surface of the seat body 3 is skipped. One increase and one decrease are difficult to ensure that the result of the positive and negative offset is an increase in the creepage distance. Therefore, a gap can be set between the extension structure 4 and the output pole 23, so that the creepage path still needs to pass through the surface of the output pole base 24 as before, but the creepage path on the surface of the extension structure 4 is increased, so that the final creepage distance is increased. Of course, the role of setting a gap between the extension structure 4 and the end plate 21 is the same, which will not be described in detail here.

[0081] It should be noted that, refer to Figure 4The number of output pole bases 24 may be two or more, and the battery module 20 may further include a module bar 25 connecting two adjacent output pole bases 24 . In this case, a gap may also be provided between the module bar 25 and the extension structure 4 .

[0082] Specifically, the extension structure 4 here can be a protruding structure arranged on the surface of the seat body 3, or it can be a recessed structure arranged on the surface of the seat body 3. The present application does not make specific limitations on the specific structural form of the extension structure 4. As long as the structural form of the extension structure 4 can increase the creepage distance between the output pole 23 and the end plate 21, it is within the protection scope of the present application.

[0083] The extension structure 4 is arranged on the surface of the seat body 3 and is located on the creepage path between the output pole 23 and the end plate 21. The new creepage path not only passes through the surface of the seat body 3, but also needs to pass through the surface of the extension structure 4 when encountering the extension structure 4. The new creepage path is increased, that is, the creepage distance between the output pole 23 and the end plate 21 is increased, and a gap is set between the extension structure 4 and the output pole 23, and a gap is set between the extension structure 4 and the end plate 21. This can avoid the creepage path directly from the output pole 23 to the extension structure 4, or directly to the end plate 21 after passing through the extension structure 4, thereby ensuring that the creepage distance can be increased and reducing the risk of insulation failure of the output pole 23 and the end plate 21 due to thermal runaway of the battery pack 100.

[0084] In some embodiments, the seat body 3 includes a front side facing the battery cell 22, a rear side arranged opposite to the front side, and a left side and a right side respectively connecting the front side and the rear side; the extension structure 4 is arranged on the rear side; and / or, the extension structure 4 is arranged on the left side; and / or, the extension structure 4 is arranged on the right side.

[0085] The side of the seat body 3 facing the battery cell 22 is generally arranged close to the battery cell 22, and the output pole 23 will be connected to the battery cell 22 through the front side of the seat body 3. If the extension structure 4 is arranged on the front side, on the one hand, the contact between the extension structure 4 and the output pole 23 may reduce the creepage distance, and on the other hand, in order to avoid interference, a larger installation space needs to be reserved for the extension structure 4, which will increase the volume of the battery device. Therefore, the extension structure 4 is not arranged on the side facing the battery cell 22, that is, the front side. The extension structure 4 can be arranged in other directions of the seat body 3, such as the left side, the right side and the rear side. Specifically, the extension structure 4 can be arranged in one direction of the other directions, or in multiple directions of the other directions.

[0086] By not arranging the extension structure 4 on the side facing the battery cell 22 , the risk of the extension structure 4 contacting the output pole 23 can be reduced, and it is also beneficial to reduce the volume of the battery device.

[0087] Reference Figure 4 and Figure 5 In some embodiments, a mounting groove is provided on the end plate 21, the seat body 3 includes a connecting member 31 and a mounting member 32, the connecting member 31 is installed in the mounting groove; one side of the mounting member 32 is connected to the connecting member 31, and the other side of the mounting member 32 is used to install the output pole 23, and the extension structure 4 is arranged on the surface of the mounting member 32 or the connecting member 31.

[0088] The mounting groove can be a recessed groove in time, and the connecting member 31 can be a columnar body. The bottom end of the connecting member 31 is installed in the mounting groove, and the top end of the connecting member 31 is connected to the mounting member 32. The specific connection method between the connecting member 31 and the mounting groove can be a snap connection, a threaded connection, or a tight fit connection. The output pole 23 can be installed on the mounting member 32 by a threaded member. One side of the mounting member 32 is connected to the connecting member 31, and the other side of the mounting member 32 is used to install the output pole 23. Specifically, the bottom surface of the mounting member 32 can be connected to the connecting member 31, and the output pole 23 is installed on the top surface of the mounting member 32. More specifically, refer to Figure 5 , the mounting member 32 is provided with a first groove 1, and the output pole 23 is partially provided in the first groove 1. The extension structure 4 can be provided on the surface of the mounting member 32, or on the surface of the connecting member 31, or the extension structure 4 can be provided on the surface of the mounting member 32 and the surface of the connecting member 31, but it is necessary to ensure that the extension structure 4 is located on the creepage path between the output pole 23 and the end plate 21, so as to increase the creepage distance between the output pole 23 and the end plate 21. As for the connection form between the mounting member 32 and the connecting member 31, it can be a fixed connection, a detachable connection, or an integral molding setting.

[0089] By setting a mounting groove on the end plate 21 for mounting the connector 31, the mounting member 32 is connected to the battery cell 22 through the output pole 23. The extension structure 4 can be set on the surface of the connector 31 or on the surface of the mounting member 32 to increase the creepage distance between the output pole 23 and the end plate 21.

[0090] Reference Figure 5 In some embodiments, the mounting member 32 includes a bottom plate 321 and a side plate 322, the bottom plate 321 is connected to the connecting member 31; the side of the bottom plate 321 away from the connecting member 31 is used to mount the output pole 23, the side plate 322 is arranged on the side of the bottom plate 321 away from the connecting member 31, and is arranged around at least part of the periphery of the output pole 23; the extension structure 4 is arranged on the bottom plate 321, and the extension structure 4 is spaced apart from the connecting member 31.

[0091] The bottom plate 321 is used to be installed on the connecting member 31. Specifically, the bottom of the connecting member 31 is installed in the installation groove, the bottom surface of the bottom plate 321 is installed on the top of the connecting member 31, and the output pole 23 is installed on the top surface of the bottom plate 321. The bottom plate 321 can be a horizontal plate, and the side plates 322 include multiple sub-side plates 322. For example, when the bottom plate 321 is a square plate, no sub-side plate 322 is set on the side where the output pole 23 extends into the installation groove, and sub-side plates 322 can be set on the other three sides of the bottom plate 321 to form the side plates 322. The bottom plate 321 and the side plates 322 cooperate to form the first groove 1. Specifically, the extension structure 4 can extend from the side of the bottom plate 321 away from the side plate 322, refer to Figure 5 The side plate 322 is arranged above the bottom plate 321, and the extension structure 4 is arranged below the bottom plate 321. Figure 5 In addition, a gap is provided between the extension structure 4 and the connection member 31 to avoid direct contact between the extension structure 4 and the connection member 31 and reduce the creepage distance.

[0092] By arranging the extension structure 4 on the bottom plate 321 , the creepage distance from the output pole 23 to the end plate 21 can be increased, and the manufacturing is convenient.

[0093] In some embodiments, the extension structure 4 includes an extension plate 41, and the extension plate 41 is extended from the bottom plate 321 toward the side away from the side plate 322. Figure 5 , the extension plate 41 cooperates with the bottom plate 321 to form the second groove 2, the opening directions of the first groove 1 and the second groove 2 are opposite, specifically, the first groove 1 opens upward, and the second groove 2 opens downward. The extension plate 41 can be perpendicular to the bottom plate 321; or, referring to Figure 6 , the extension plate 41 can be arranged at an obtuse angle with the bottom plate 321; or, referring to Figure 7 , the extension plate 41 can be set at an acute angle with the bottom plate 321.

[0094] The extension structure 4 may be a plate-like structure like the side plate 322, and is named here as the extension plate 41. The extension plate 41 may be arranged perpendicularly to the bottom plate 321, or may be arranged at an acute angle or an obtuse angle to the bottom plate 321, so that a path that needs to pass through the surface of the extension plate 41 is added to the creepage path from the output pole 23 to the end plate 21, that is, the creepage distance between the output pole 23 and the end plate 21 is increased.

[0095] By setting the extension structure 4 as an extension plate 41, the extension plate 41 extends toward the side away from the side plate 322, which is not only convenient to manufacture, but also increases the path on the surface of the extension plate 41 in the creepage path from the output pole 23 to the end plate 21, thereby increasing the creepage distance between the output pole 23 and the end plate 21 and reducing the risk of insulation failure that may be caused by thermal runaway of the battery pack 100.

[0096] Reference Figure 5-Figure 7 In some embodiments, the side panel 322 and the extension panel 41 are located in the same plane and are integrally formed.

[0097] The side panel 322 and the extension panel 41 are located in the same plane, which means that the plane where the top surface of the side panel 322 is located coincides with the plane where the top surface of the extension panel 41 is located, or the plane where the bottom surface of the side panel 322 is located coincides with the plane where the bottom surface of the extension panel 41 is located. An integrated molding arrangement means that the two can be a whole plate, which is integrally molded during manufacturing. For example, when the side panel 322 is arranged perpendicular to the bottom panel 321, the extension panel 41 is also arranged perpendicular to the bottom panel 321, and the two form a plate. When the side panel 322 and the bottom panel 321 are arranged at an acute angle, the extension panel 41 and the bottom panel 321 are arranged at an obtuse angle, and the two form a plate that is obliquely installed on the bottom panel 321. When the side panel 322 and the bottom panel 321 are arranged at an obtuse angle, the extension panel 41 and the bottom panel 321 are arranged at an acute angle, and the two form a plate that is obliquely installed on the bottom panel 321. Specifically, the bottom plate 321 and the side plate 322 form a first groove 1, the opening of the first groove 1 is arranged upward, and the bottom plate 321 and the extension plate 41 form a second groove 2, the opening of the second groove 2 is arranged downward.

[0098] By integrally forming the side plate 322 and the extension plate 41 , the manufacturing difficulty is reduced, the process steps are simplified, and the production efficiency is improved.

[0099] Reference Figure 8 In some embodiments, the extension structure 4 further includes a first extension section 42 disposed on the extension plate 41 , the first extension section 42 is disposed on a creepage path from the output pole 23 to the end plate 21 , and the first extension section 42 is spaced apart from the connector 31 .

[0100] The first extension section 42 may be an extended strip structure or a plate structure or other unlisted structures, which is named as the first extension section 42 here. The first extension section 42 is provided on the basis of the extension plate 41, which is equivalent to adding a path on the surface of the first extension section 42 on the basis of the original creepage path, thereby increasing the creepage distance. At the same time, a gap is also provided between the first extension section 42 and the connector 31 to avoid the possibility of direct contact between the first extension section 42 and the connector 31, thereby reducing the creepage distance.

[0101] By setting a first extension section 42 on the extension plate 41, and setting the first extension section 42 on the creepage path between the output pole 23 and the end plate 21, and setting a gap between the first extension section 42 and the connector 31 to avoid direct contact as much as possible, the creepage distance can be further increased on the basis of setting the extension plate 41, thereby reducing the short circuit risk caused by electrolyte enrichment on the surface of the output pole base 24 when the battery pack 100 is in thermal runaway.

[0102] Reference Figure 8and Fig. 9 In some embodiments, the first extension section 42 is disposed on a side of the extension plate 41 facing the connection member 31 , and extends toward the connection member 31 .

[0103] Regarding the location and extension direction of the first extension section 42, it can be set on the side of the extension plate 41 away from the connector 31, that is, the outside of the extension plate 41, and extend in the direction away from the connector 31. It can also be set on the inside of the extension plate 41, that is, the side facing the connector 31, and extend in the direction where the connector 31 is located. The extension here can be horizontal or inclined. As long as the creepage distance can be increased, the application does not specifically limit the extension direction.

[0104] By arranging the first extension section 42 on the side of the extension plate 41 facing the connector 31, that is, the inner side, the internal space of the output pole base 24 is fully utilized without occupying too much space in the battery module 20, which helps to reduce the volume of the battery pack 100 while reducing the risk of insulation failure.

[0105] Reference Figure 8 and Fig. 9 In some embodiments, there are multiple first extending sections 42 , and the multiple first extending sections 42 are arranged at intervals along the second direction, and the second direction is the extending direction of the extension plate 41 .

[0106] Specifically, when the extension plate 41 is arranged vertically, the second direction here may be a vertical direction, such as Figure 8 The first extension sections 42 are arranged at intervals, which means that there is a gap between two adjacent first extension sections 42, and the creepage path needs to pass through the surface of each first extension section 42 and the gap between the two.

[0107] By setting the number of the first extending sections 42 to be multiple and arranging the multiple first extending sections 42 at intervals, the length of the creepage path can be further increased, that is, the creepage distance is increased, which is beneficial to reducing the risk of insulation failure of the output pole base 24.

[0108] Reference Fig.10 In some embodiments, the extension structure 4 further includes a second extension section 45 disposed on the bottom plate 321 , the second extension section 45 is disposed on a side of the bottom plate 321 away from the side plate 322 , and the second extension section 45 is spaced apart from the connecting member 31 .

[0109] The second extension section 45 has a similar structure to the first extension section 42, but the first extension section 42 is arranged on the extension plate 41, and the second extension section 45 is arranged on the bottom plate 321, and the installation positions of the two are different. The function of the second extension section 45 is similar to that of the first extension section 42, and the second extension section 45 is arranged on the creepage path from the output pole 23 to the end plate 21. The second extension section 45 can be arranged on the side of the bottom plate 321 away from the side plate 322, that is, facing the connecting member 31. In this embodiment, the second extension section 45 is arranged on the side of the bottom plate 321 away from the side plate 322, and the second extension section 45 extends downward from the bottom plate 321.

[0110] By arranging the second extension section 45 on the side of the bottom plate 321 away from the side plate 322, when the electrolyte condenses or settles on the side of the bottom plate 321 away from the side plate 322, that is, the bottom surface of the bottom plate 321, or condenses on the second extension section 45, the electrolyte is easy to fall under the action of gravity, so that the electrolyte is not easy to gather, reducing the risk of short circuit. At the same time, the second extension section 45 can also increase the creepage distance, thereby reducing the risk of short circuit caused by the enrichment of electrolyte on the surface of the output pole base 24 when the battery pack 100 is in thermal runaway.

[0111] Reference Fig.10 and Fig.11 In some embodiments, there are multiple second extension sections 45, and the multiple second extension sections 45 are arranged at intervals along the third direction, and the third direction is perpendicular to the first direction. The second extension sections 45 are arranged at intervals, which means that there is a gap between two adjacent second extension sections 45, and the creepage path needs to pass through the surface of each second extension section 45 and the gap between the two.

[0112] Meanwhile, when the second direction is a vertical direction, the third direction here may be a horizontal direction perpendicular to the second direction. Fig.10 The vertical direction indicated by Y in the figure, and the third direction as Fig.10 Specifically, the second extension sections 45 are distributed on the bottom plate 321 at intervals along the horizontal direction.

[0113] By setting the number of the second extending sections 45 to be multiple and arranging the multiple second extending sections 45 at intervals, the length of the creepage path can be further increased, that is, the creepage distance is increased, which is beneficial to reducing the risk of insulation failure of the output pole base 24.

[0114] Reference Figure 12-14 In some embodiments, the bottom plate 321 is provided with a receiving groove 3211 , the connecting member 31 is installed in the receiving groove 3211 , and the extension structure 4 includes a third extending section 43 provided on the outer side surface 3212 of the bottom plate 321 .

[0115] The accommodating groove 3211 is formed on the bottom surface of the bottom plate 321, that is, the side of the bottom plate 321 facing the connecting piece 31. At this time, it is equivalent to the side plate 322 extending downward. The height of the bottom plate 321 is large enough to wrap at least most of the connecting piece 31. At this time, a third extending section 43 can be set on the outer side surface 3212 of the bottom plate 321. The third extending section 43 is also set on the creepage path between the output pole 23 and the end plate 21, so as to increase the creepage distance between the output pole 23 and the end plate 21.

[0116] By providing a third extension section 43 on the outer side surface 3212 of the bottom plate 321, the creepage distance between the output pole 23 and the end plate 21 can also be increased, thereby reducing the risk of insulation failure caused by electrolyte enrichment on the surface of the output pole base 24 when the battery pack 100 is in thermal runaway.

[0117] Reference Fig.12 In some embodiments, the third extension section 43 is extended in a direction away from the connecting member 31 .

[0118] The third extension section 43 is also not in direct contact with the connector 31 in principle, and the purpose is also to prevent the possible reduction of the creepage distance. The third extension section 43 is an extension portion extending from the side of the bottom plate 321, and extends in a direction away from the connector 31 to avoid direct contact with the connector 31.

[0119] By arranging the third extending section 43 to extend in a direction away from the connecting member 31 , the possibility of direct contact between the third extending section 43 and the connecting member 31 is reduced, thereby further reducing the risk of insulation failure.

[0120] In some embodiments, reference Fig.12 , the third extension section 43 extends along a third direction, and the third direction is perpendicular to the first direction; or, referring to Fig.14 The third extending section 43 extends toward the end plate 21 , and the third extending section 43 is spaced apart from the end plate 21 .

[0121] Specifically, each third extension section 43 is extended along a third direction, and the third direction here can be a horizontal direction, such as Fig.12 The third extension section 43 may extend in the horizontal direction to increase the creepage distance; of course, refer to Fig.14 The third extension section 43 can also extend toward the direction of the end plate 21, that is, extend downward at an angle, so that the condensation on the third extension section 43 drips off the output electrode base 24 under the action of gravity, which can effectively reduce the enrichment of the electrolyte.

[0122] By setting the third extension section 43 to extend horizontally, the creepage distance between the output pole 23 and the end plate 21 can be increased. Alternatively, by setting the third extension section 43 to extend downward, the electrolyte can flow under its own gravity, reducing the enrichment of the electrolyte and thus reducing the risk of insulation failure.

[0123] Reference Fig.12 In some embodiments, there are multiple third extending sections 43 , and the multiple third extending sections 43 are arranged at intervals along the height direction of the bottom plate 321 .

[0124] The height direction of the bottom plate 321 here can be a vertical direction, such as Fig.12 The third extension sections 43 are arranged at intervals, which means that there is a gap between two adjacent third extension sections 43, and the creepage path needs to pass through the surface of each third extension section 43 and the gap between the two.

[0125] By setting the number of the third extending sections 43 to be multiple and arranging the multiple third extending sections 43 at intervals, the length of the creepage path can be further increased, that is, the creepage distance is increased, which is beneficial to reducing the risk of insulation failure of the output pole base 24.

[0126] Reference Fig.15 In some embodiments, the extension structure 4 includes a fourth extension section 44 disposed on the connecting member 31 , and the fourth extension section 44 is spaced apart from the mounting member 32 and the end plate 21 , respectively.

[0127] The fourth extension section 44 refers to the extension portion provided on the surface of the connector 31. The aforementioned are all provided on the mounting member 32. In fact, the extension structure 4 can also be provided on the surface of the connector 31. In a further embodiment, the fourth extension section 44 can be provided on the side of the connector 31. The number of the fourth extension section 44 can be multiple. The multiple fourth extension sections 44 are arranged at intervals along the vertical direction. The fourth extension section 44 is provided at intervals with the mounting member 32 and the end plate 21 respectively to avoid direct contact between the fourth extension section 44 and the mounting member 32 or the connector 31 as much as possible. The fourth extension section 44 is also provided on the creepage path to increase the creepage distance between the output pole 23 and the end plate 21.

[0128] The fourth extension section 44 is provided on the connector 31 to increase the distance between the output pole 23 and the end plate 21 , thereby reducing the risk of insulation failure caused by the enrichment of electrolyte on the surface of the output pole base 24 .

[0129] It should be noted that the first extension section 42, the second extension section 45, the third extension section 43 and the fourth extension section 44 can be set separately, or any two or three of them can be selected for setting. Of course, all of them can also be set. The art can make reasonable choices according to actual needs.

[0130] In some embodiments, the extension structure 4 further includes a groove structure disposed on the surface of the seat body 3 .

[0131] The aforementioned first extension section 42 and second extension section 45 are both described as extending parts on the surface of the seat body 3. In fact, the extension structure 4 can also be a recessed structure, such as a groove structure provided on the surface of the seat body 3. The groove structure is located on the creepage path between the output pole 23 and the end plate 21, and is used to increase the creepage distance between the output pole 23 and the end plate 21.

[0132] The recessed groove structure is provided on the surface of the seat body 3 to increase the distance between the output pole 23 and the end plate 21 , thereby reducing the risk of insulation failure caused by the enrichment of electrolyte on the surface of the output pole base 24 .

[0133] According to some embodiments of the present application, the present application provides a battery device, including an end plate 21, a plurality of battery cells 22, an output pole 23 and an output pole base 24; the plurality of battery cells 22 are arranged along a first direction, the end plate 21 is arranged at least one end of the plurality of battery cells 22 in the first direction, the output pole 23 is electrically connected to one of the battery cells 22, and the output pole base 24 includes a seat body 3 and an extension structure 4, the seat body 3 is mounted on the end plate 21, the output pole 23 is mounted on the seat body 3, one end of the extension structure 4 is connected to the surface of the seat body 3, and is located on the creepage path between the output pole 23 and the end plate 21. There is a gap between the extension structure 4 and the output pole 23, and between the extension structure 4 and the end plate 21. The seat body 3 includes a connector 31 and a mounting member 32, the connector 31 is mounted in the mounting groove; the mounting member 32 is connected to the battery cell 22 through the output pole 23; the extension structure 4 is arranged on the surface of the mounting member 32 or the connector 31. The extension structure 4 can be a protruding part or a groove structure, and can be set on the mounting member 32 or on the connecting member 31. Specifically, the extension structure 4 includes an extension plate 41 and a first extension section 42 provided on the extension plate 41, and the extension plate 41 extends from the bottom plate 321 toward the side away from the side plate 322, and the number of the first extension sections 42 is multiple, and the multiple first extension sections 42 are arranged at intervals along the second direction, and a gap is provided between the first extension section 42 and the connecting member 31. The extension structure 4 can also include a second extension section 45, and the second extension section 45 is arranged on the side of the bottom plate 321 away from the side plate 322, and a gap is provided between the second extension section 45 and the connecting member 31, and the number of the second extension sections 45 is multiple, and the multiple second extension sections 45 are arranged at intervals along the third direction. The extension structure 4 may also include a third extension section 43 and a fourth extension section 44, wherein the third extension section 43 is disposed on the side of the bottom plate 321 and extends along the third direction; or, the third extension section 43 extends toward the end plate 21 and is spaced apart from the end plate 21, and the number of the third extension sections 43 is multiple, and the multiple third extension sections 43 are spaced apart along the height direction of the bottom plate 321. The fourth extension section 44 is disposed on the connector 31, and is spaced apart from the mounting member 32 and the end plate 21, respectively. By providing the extension structure 4, the extension structure 4 is disposed on the creepage path between the output pole 23 and the end plate 21, so as to increase the creepage distance between the output pole 23 and the end plate 21, thereby reducing the risk of insulation failure caused by the accumulation of electrolyte on the surface of the output pole base 24 when the battery pack 100 is in thermal runaway.

[0134] According to some embodiments of the present application, the present application provides an electric device, which includes a device body and the above-mentioned battery device, wherein the battery device is arranged in the device body. The electric device may be a vehicle 1000 .

[0135] The above description is only an optional embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the application concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are arranged along a first direction; An end plate, the end plate being disposed at at least one end of the plurality of battery cells in the first direction; An output pole, the output pole being electrically connected to one of the battery cells; An output pole base, the output pole base comprising: A seat body, the seat body is mounted on the end plate, and the output pole is mounted on the seat body; as well as An extension structure is connected to the surface of the seat body and is located on a creepage path between the output pole and the end plate. The extension structure is spaced apart from the output pole and the end plate.

2. The battery device according to claim 1, characterized in that: The seat body includes a front side facing the battery cell, a rear side disposed opposite to the front side, and a left side and a right side respectively connecting the front side and the rear side; The extension structure is arranged on the rear side; and / or, The extension structure is arranged on the left side; and / or, The extension structure is arranged on the right side.

3. The battery device according to claim 1, characterized in that The end plate is provided with a mounting groove, and the seat body comprises: a connecting member, the connecting member being installed in the installation slot; and A mounting member, one side of which is connected to the connecting member, and the other side of which is used for mounting the output pole; The extension structure is arranged on the surface of the mounting member or the connecting member.

4. The battery device according to claim 3, characterized in that: The mounting member comprises: a bottom plate, the bottom plate being connected to the connecting member, and a side of the bottom plate facing away from the connecting member being used for mounting the output pole; and A side plate, the side plate is arranged on a side of the bottom plate away from the connecting member and is arranged around at least a portion of the periphery of the output pole; The extension structure is arranged on the bottom plate, and the extension structure and the connecting member are spaced apart.

5. The battery device according to claim 4, characterized in that: The extension structure includes an extension plate, and the extension plate is extended from the bottom plate toward a side away from the side plate; The extension plate and the bottom plate are perpendicular to each other; or, The extension plate is arranged at an acute angle with the bottom plate; or, The extension plate is arranged at an obtuse angle with the bottom plate.

6. The battery device according to claim 5, characterized in that The side plate and the extension plate are located in the same plane and are integrally formed.

7. The battery device according to claim 5, characterized in that: The extension structure further includes a first extending section disposed on the extension plate, the first extending section being disposed on a creepage path from the output pole to the end plate, and the first extending section being spaced apart from the connecting member.

8. The battery device according to claim 7, characterized in that: The first extending section is arranged on a side of the extending plate facing the connecting member, and extends toward the connecting member.

9. The battery device according to claim 7, characterized in that: There are multiple first extending sections, and the multiple first extending sections are arranged at intervals along a second direction, and the second direction is the extending direction of the extension plate.

10. The battery device according to any one of claims 4 to 9, characterized in that: The extension structure further includes a second extending section, which is arranged on a side of the bottom plate away from the side plate, and a gap is arranged between the second extending section and the connecting member.

11. The battery device according to claim 10, characterized in that: There are multiple second extending sections, and the multiple second extending sections are arranged at intervals along a third direction, and the third direction is perpendicular to the first direction.

12. The battery device according to claim 4, characterized in that: The bottom plate is provided with a receiving groove, the connecting member is installed in the receiving groove, and the extension structure includes a third extending section arranged on the outer side surface of the bottom plate.

13. The battery device according to claim 12, characterized in that: The third extending section is extended in a direction away from the connecting member.

14. The battery device according to claim 12, characterized in that: The third extending section is extended along a third direction, and the third direction is perpendicular to the first direction; or, the third extending section is extended toward the end plate, and the third extending section is spaced apart from the end plate.

15. The battery device according to any one of claims 12 to 14, characterized in that: There are multiple third extending sections, and the multiple third extending sections are arranged at intervals along the height direction of the bottom plate.

16. The battery device according to claim 3, characterized in that: The extension structure includes a fourth extending section arranged on the connecting member, and the fourth extending section is spaced apart from the mounting member and the end plate respectively.

17. An electrical equipment, characterized in that: The electrical equipment comprises an equipment body and a battery device as described in any one of claims 1 to 16, wherein the battery device is arranged on the equipment body.

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