Battery device and electric device

Abstract

A battery device (100), and an electric device. The battery device (100) comprises a plurality of battery cells (20) and a sampling member (30), wherein the plurality of battery cells (20) are arranged in a first direction. Each battery cell (20) comprises terminals (21), and in the first direction, the two electrically connected terminals (21) of every two adjacent battery cells (20) are respectively a first terminal (23) and a second terminal (24). The sampling member (30) is in direct contact with the first terminal (23) and / or the second terminal (24) so as to collect parameter information of corresponding battery cells (20).

Description

Battery device and electric device TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an electric device. BACKGROUND

[0002] In the related art, the battery device includes a sampling structure and a battery cell, and the sampling structure samples the electrical information of the battery cell. Specifically, the two poles of the two adjacent battery cells are electrically connected through a gasket, and the sampling structure is connected to the gasket to sample the parameter information of the battery cell. However, as the structure of the battery device is improved, the sampling method of the gasket cannot be adapted to various types of battery devices.

[0003] SUMMARY

[0004] In view of the above problems, the present application provides a battery device and an electric device, which can be adapted to various types of battery devices and can ensure the accuracy and reliability of the parameter information of the battery cell.

[0005] In a first aspect, the present application provides a battery device, which comprises:

[0006] a plurality of battery cells arranged along a first direction, the battery cells comprising poles, and in the first direction, the two poles electrically connected of the two adjacent battery cells are a first pole and a second pole, respectively;

[0007] a sampling member, which directly contacts the first pole and / or the second pole to collect the parameter information of the corresponding battery cell.

[0008] In the battery device of the technical solution of the present application, the sampling member directly contacts the first pole and / or the second pole to collect the parameter information of the corresponding battery cell, which can be adapted to battery devices without gasket structure design, gasket structure design that cannot set the sampling structure, etc., and can improve the adaptability of the sampling method to the battery device. At the same time, directly collecting the information of the pole can also ensure the accuracy and reliability of the parameter information of the battery cell.

[0009] In some embodiments, the contact mode of the sampling member and the pole includes at least one of the following:

[0010] the sampling member directly contacts at least one of the first pole and the second pole in the axial direction of the pole;

[0011] the sampling member directly contacts at least one of the first pole and the second pole in the circumferential direction of the pole;

[0012] the sampling member directly contacts at least one of the first pole and the second pole in the radial direction of the pole.

[0013] In the above embodiment, the sampling member directly contacts the pole column in at least one of the axial direction, the circumferential direction and the radial direction of the pole column, so that the sampling member is electrically connected with the pole column, thereby providing a flexible sampling connection scheme for different pole column connection modes, and the arrangement of the sampling member is more flexible, and the limitation of the battery device space on the sampling member is relieved to some extent.

[0014] In some embodiments, the first pole column is provided with a first groove, a part of the second pole column extends into the first groove and is electrically connected with the first pole column; and the sampling member is abuttingly fitted between the first pole column and the second pole column.

[0015] In the above embodiment, the sampling member is abuttingly fitted between the first pole column and the second pole column, so that the sampling member can collect the parameter information of the battery monomer corresponding to the first pole column and the parameter information of the battery monomer corresponding to the second pole column.

[0016] In some embodiments, the sampling member is sleeved on the outside of the second pole column, and the two side surfaces of the sampling member abut against the first pole column and the second pole column, respectively.

[0017] In the above embodiment, the sampling member is sleeved on the pole column, so that the sampling member is convenient to assemble and is not easy to fall off; at the same time, the sampling member sleeved on the pole column can be abuttingly fitted between the first pole column and the second pole column stably to complete sampling, so that the flexibility, reliability and stability of sampling can be improved.

[0018] In some embodiments, the second pole column comprises a pole column body and a limiting protrusion protruding from the circumferential side surface of the pole column body; the pole column body extends into the first groove and is electrically connected with the first pole column, the sampling member is sleeved on the outside of the pole column body, and one side surface of the sampling member abuts against the limiting protrusion, and the other side surface of the sampling member abuts against the wall body of the first pole column at the slot opening of the first groove.

[0019] In the above embodiment, on the one hand, the limiting protrusion is arranged to limit the sampling member, so as to prevent the sampling member from moving towards the root of the pole column and directly contacting the shell, thereby preventing wear and tear; on the other hand, the arrangement of the limiting protrusion enables the sampling member to abut between the limiting protrusion and the first pole column during sampling, so that the sampling structure is stable and reliable, and the sampling operation is facilitated, so as to ensure the stability and reliability of sampling.

[0020] In some embodiments, the sampling member comprises a connecting portion and a sleeving portion, the sleeving portion is connected to the connecting portion, the sleeving portion is sleeved on the outside of the second pole column, and the two side surfaces of the sleeving portion abut against the first pole column and the second pole column, respectively; and the connecting portion is connected with the output line of sampling.

[0021] In the above embodiment, the sampling member is divided into two parts connected with each other, one part realizes sampling and structural connection, and the other part realizes signal output, so that the stability and reliability of the sampling member can be ensured.

[0022] In some embodiments, the sleeving part comprises a sleeving plate, the sleeving plate is provided with a first through hole, and the sleeving plate is sleeved on the second pole column through the first through hole.

[0023] In the above embodiments, the sampling member can abut against the first pole column and the second pole column through the sleeving plate, and the sampling member has a large contact area with the first pole column and the second pole column, which is beneficial to maintaining the connection stability of the sampling member and the first pole column and the second pole column.

[0024] In some embodiments, the sleeving plate is further provided with a first extension hole at an end away from the connecting part, and the first extension hole extends from an edge of the sleeving plate to communicate with the first through hole.

[0025] In the above embodiments, the first extension hole is provided, so that the sleeving plate can be deformed to adapt to the size of the pole column body when the sleeving plate is sleeved on the pole column body, thereby reducing the probability of scratching the pole column body during assembly, and ensuring that the sampling member is conveniently assembled on the pole column body. At the same time, during installation, the pole column body can be clamped into the first through hole from the first extension hole, thereby realizing the assembly of the sampling member on the second pole column.

[0026] In some embodiments, the size of the first extension hole is smaller than the size of the first through hole.

[0027] In the above embodiments, the first extension hole has a small size, which can ensure the stability and reliability of the cooperation between the sampling member and the pole column.

[0028] In some embodiments, the sleeving plate is further provided with a second extension hole at an end close to the connecting part, and the second extension hole extends from the connecting part to communicate with the first through hole.

[0029] In the above embodiments, during installation of the sampling member, the pole column body is clamped into the first through hole from the first extension hole. During the clamping process, the distance between the two clamping arms at the first extension hole is increased due to the extrusion of the pole column body on the sleeving plate. The second extension hole is provided, so that the two clamping arms are more easily extruded apart by the pole column body, thereby facilitating the assembly of the pole column body and the sleeving part, and improving the assembly efficiency of the pole column body and the sampling member.

[0030] In some embodiments, the number of sleeving plates is two, and the two sleeving plates are spaced apart on the connecting part. One of the two sleeving plates abuts against the second pole column, and the other of the two sleeving plates abuts against the first pole column.

[0031] In the above embodiment, when one of the sleeve plates is pressed by the first pole, the sleeve plate can elastically deform towards the other sleeve plate. The two sleeve plates arranged at intervals can provide space for the deformation of the sleeve plate. The elastically deformed sleeve plate can provide elastic force to the first pole, so that the sleeve plate is in close contact with the first pole. When the other sleeve plate is pressed by the second pole, the sleeve plate can provide elastic force to the second pole, so that the sleeve plate is in close contact with the second pole. Thus, the effective contact between the sleeve plate and the pole is ensured to a certain extent, and the reliability of the sampling element is improved to a certain extent.

[0032] In some embodiments, the sleeve part further comprises an elastic pad arranged on one side of the sleeve plate, the elastic pad is provided with a through hole matched with the first through hole, and the sleeve plate and the elastic pad are sleeved on the second pole through the first through hole and the through hole. The elastic pad is in contact with the first pole, and the side of the sleeve part away from the elastic pad is in contact with the second pole.

[0033] In the above embodiment, the elastic pad can be clamped into the sleeve plate and the first pole in an interference fit, so that the elastic pad is in a compressed state. The elastic pad can apply pressure to the sleeve plate, which can achieve effective contact between the sleeve plate and the second pole.

[0034] In some embodiments, the sleeve plate is provided with an elastic ring around the first through hole, and the sleeve plate is sleeved on the second pole through the elastic ring.

[0035] In the above embodiment, the sleeve plate is sleeved on the second pole through the elastic ring, which can absorb certain vibrations. In the case of vibration impact on the battery monomer or the electrical device, the effective contact between the sampling element and the second pole can also be maintained to a certain extent.

[0036] In some embodiments, the sleeve plate is provided with a receiving groove around the first through hole, and at least a part of the elastic ring is accommodated in the receiving groove.

[0037] In the above embodiment, when the elastic ring is installed, the elastic ring can be positioned through the receiving groove, which facilitates the installation of the elastic ring. When the sampling element and the pole are assembled, the elastic ring is also less likely to fall off the sampling element.

[0038] In some embodiments, the sampling element is inserted into the first pole and the second pole to electrically connect the first pole and the second pole.

[0039] In the above embodiment, the sampling element and the first pole and the second pole can be electrically connected through insertion, which can improve the assembly efficiency of the sampling element and the first pole and the second pole to a certain extent.

[0040] In some embodiments, the first pole column is provided with a second groove, and the second pole column is provided with a third groove; the sampling member comprises a plug-in part and a sampling part, two ends of the plug-in part are respectively plugged into the second groove and the third groove, and the sampling part is connected with the plug-in part and used for sampling.

[0041] In the above embodiments, the sampling member can be inserted into the second groove and the third groove through the plug-in part, so as to electrically connect the first pole column and the second pole column.

[0042] In some embodiments, the sampling member comprises a plug-in part and a sampling part, the plug-in part is provided with a fourth groove and a fifth groove; the first pole column and the second pole column are respectively plugged into the fourth groove and the fifth groove, and the sampling part is connected with the plug-in part and used for sampling.

[0043] In the above embodiments, the first pole column and the second pole column can be respectively inserted into the fourth groove and the fifth groove, so as to electrically connect the plug-in part, greatly simplify the electrical connection structure between the pole columns, improve the convenience of the electrical connection structure, and ensure the stability of the electrical connection.

[0044] In some embodiments, the sampling part is integrally formed with the plug-in part.

[0045] In the above embodiments, the gap formed when the sampling part is connected with the plug-in part can be reduced or avoided, which is beneficial to reduce the internal resistance of the sampling member and prevent the sampling member from being damaged due to overheating to a certain extent.

[0046] In some embodiments, the sampling part is sleeved on the outside of the plug-in part, and two side surfaces of the sampling part are respectively abutted against the first pole column and the second pole column.

[0047] In the above embodiments, the sampling part is sleeved on the plug-in part, which is convenient to assemble and not easy to fall off; at the same time, the sampling part sleeved on the plug-in part can also be stably abutted and matched between the first pole column and the second pole column to complete sampling, which can improve the flexibility, reliability and stability of sampling.

[0048] In some embodiments, the sampling part comprises a connecting structure and a sleeving structure, the sleeving structure is matched with the connecting structure, the sleeving structure is sleeved on the outside of the plug-in part, and two side surfaces of the sleeving structure are respectively abutted against the first pole column and the second pole column; the connecting structure is connected with an output line of sampling.

[0049] In the above embodiments, the sampling part is provided with two structures connected with each other, one structure realizes sampling and structure connection, and the other structure realizes signal output, which can ensure the stability and reliability of the sampling part.

[0050] In some embodiments, the sleeving structure comprises a sleeving plate, a second through hole is formed in the sleeving plate, and the sleeving plate is sleeved on the plug-in part through the second through hole.

[0051] In the above embodiment, the sampling member can abut against the first and second pole columns respectively through the sleeving plates, and the sampling member has a large contact area with the first and second pole columns, which is conducive to maintaining the stability of the connection between the sampling member and the first and second pole columns.

[0052] In some embodiments, the sleeving plate is further provided with a first extension hole at one end away from the connecting structure, and the first extension hole extends from the edge of the sleeving plate to communicate with the second through hole.

[0053] In the above embodiment, the first extension hole is provided to facilitate the deformation of the sleeving plate to adapt to the size of the plug-in part when the sleeving plate is sleeved on the plug-in part, thereby reducing the probability of scratching the plug-in part during assembly, and ensuring that the sampling part is conveniently assembled on the plug-in part. At the same time, during installation, the plug-in part can be clamped into the second through hole from the first extension hole, thereby realizing the assembly of the sampling part on the plug-in part.

[0054] In some embodiments, the size of the first extension hole is smaller than the size of the second through hole.

[0055] In the above embodiment, the small size of the first extension hole can ensure the stability and reliability of the cooperation between the sampling part and the plug-in part.

[0056] In some embodiments, the sleeving plate is further provided with a second extension hole at one end close to the connecting structure, and the second extension hole extends from the connecting structure to communicate with the second through hole.

[0057] In the above embodiment, during installation, the plug-in part is clamped into the second through hole from the first extension hole. During the clamping process, the distance between the two clamping arms at the first extension hole increases due to the extrusion of the plug-in part on the sleeving plate. The provision of the second extension hole makes it easier for the two clamping arms to be extruded apart by the plug-in part, thereby facilitating the assembly of the plug-in part and the sleeving structure and improving the assembly efficiency of the plug-in part and the sleeving structure.

[0058] In some embodiments, the number of sleeving plates is two, and the two sleeving plates are spaced apart from each other on the connecting structure. One of the two sleeving plates abuts against the second pole column, and the other of the two sleeving plates abuts against the first pole column.

[0059] In the above embodiment, when one of the sleeving plates is subjected to the pressure of the first pole column, the sleeving plate can elastically deform towards the other sleeving plate. The two sleeving plates spaced apart from each other can provide a space for the deformation of the sleeving plates. The sleeving plate that elastically deforms can provide a certain elastic force to the first pole column, so that the sleeving plate abuts against the first pole column more tightly. When the other sleeving plate is subjected to the pressure of the second pole column, the sleeving plate can provide a certain elastic force to the second pole column, so that the sleeving plate abuts against the second pole column more tightly. Thus, the abutment between the sleeving plates and the pole columns ensures the effective contact between the sleeving plates and the pole columns to a certain extent, thereby improving the reliability of the sampling member to a certain extent.

[0060] In some embodiments, the sleeving structure further comprises an elastic pad arranged on one side of the sleeving plate, the elastic pad is provided with a through hole matched with the second through hole, and the sleeving plate and the elastic pad are sleeved on the plug-in part through the second through hole and the through hole; the elastic pad abuts against the first pole column, and the side of the sleeving part away from the elastic pad abuts against the second pole column.

[0061] In the above embodiment, the elastic pad abuts against the first pole column, and the side of the sleeving part away from the elastic pad abuts against the second pole column, so that the elastic pad is located between the sleeving plate and the first pole column in a interference clamping manner, and the elastic pad is in a compressed state. The elastic pad can apply a pressure to the sleeving plate, and the pressure can realize effective contact between the sleeving plate and the second pole column.

[0062] In some embodiments, the periphery of the sleeving plate where the second through hole is arranged is provided with an elastic ring, and the sleeving plate is sleeved on the plug-in part through the elastic ring.

[0063] In the above embodiment, the sleeving plate is sleeved on the plug-in part through the elastic ring, and the elastic ring can absorb certain vibration. In the case that the vibration impacts the battery monomer or the electrical device, the effective contact between the sleeving plate and the plug-in part can also be maintained to a certain extent.

[0064] In some embodiments, the periphery of the sleeving plate where the second through hole is arranged is provided with a receiving groove, and at least a part of the elastic ring is accommodated in the receiving groove.

[0065] In the above embodiment, when the elastic ring is installed, the elastic ring can be positioned through the receiving groove, and the installation of the elastic ring is facilitated. When the sleeving structure and the plug-in part are assembled, the elastic ring is also not easy to fall off from the sleeving structure.

[0066] In some embodiments, the pole column is arranged on a wall surface with the largest area among the plurality of wall surfaces in the circumferential direction of the battery monomer.

[0067] In the above embodiment, the pole column is arranged on a wall surface with the largest area among the plurality of wall surfaces in the circumferential direction of the battery monomer, so that the area of the pole column can be increased, thereby increasing the overcurrent area of the electrical connection of the battery monomer and guaranteeing the fast charging performance. At the same time, since the battery monomer expands during use, the wall surface with the largest area has a larger expansion force relative to other wall surfaces, so that the plug-in stability of the pole column between the wall surfaces with the largest area is better.

[0068] In some embodiments, the battery monomer comprises a shell and an electrode assembly arranged in the shell; the pole column is arranged on the shell, and a tab of the electrode assembly is electrically connected with the pole column.

[0069] A gap is formed between the end of the tab arranged on the electrode assembly and the shell, the tab is arranged in the gap, and the pole column is arranged at a position opposite to the gap.

[0070] In the above embodiments, the pole post is arranged at a position opposite to the gap of the shell. When the battery cell is working, the main body of the electrode assembly will expand, and the expanded main body can drive the pole post arranged on the shell to move. If the pole post is arranged at a position opposite to the main body, when the main body moves due to expansion, the pole post can be synchronously driven to move a first displacement. The pole post is arranged at a position opposite to the gap of the shell. Even if the main body moves due to expansion, the second displacement (smaller) of the main body driving the pole post to move is smaller than the first displacement, so that the displacement of the pole post is smaller, and to a certain extent, the disconnection between the pole post and the tab caused by the large displacement of the pole post is avoided.

[0071] In some embodiments, the battery cell includes a shell and an electrode assembly, the electrode assembly is arranged in the shell, and the shell is provided with a mounting hole;

[0072] The pole post is entirely covered outside the mounting hole, or a part of the pole post is covered outside the mounting hole, and the other part of the pole post penetrates into the shell through the mounting hole and cooperates with the shell.

[0073] The pole post is electrically connected with the electrode assembly.

[0074] In the above embodiments, the pole post is entirely covered outside the mounting hole, which facilitates the assembly of the pole post and the shell, simplifies the manufacturing process, and improves the reliability and stability of the connection between the pole post and the shell. After the pole post cooperates with the shell, the pole post is not easy to be separated from the shell due to vibration or external pulling, and is not easy to be cracked or damaged due to vibration or external pulling.

[0075] A part of the pole post is covered outside the mounting hole, and the other part penetrates into the shell through the mounting hole and cooperates with the shell, which is conducive to improving the stability of the electrical connection between the pole post and the electrode assembly in the shell and the overcurrent capacity.

[0076] In some embodiments, the battery cell includes a shell and an electrode assembly, the shell includes a shell body and a cover, the shell body has an opening, and the cover seals the opening; the pole post is arranged in any one of the shell body and the cover; the electrode assembly is arranged in the shell and is electrically connected with the pole post.

[0077] In the above embodiments, the shell body and the cover can be independent components, the opening can be arranged in the shell body, and the cover can be made to cover the opening to form the internal environment of the battery cell. Without limitation, the cover and the shell body can also be integrated. Specifically, the cover and the shell body can form a common connecting surface before other components enter the shell. When it is necessary to encapsulate the interior of the shell body, the cover is made to cover the shell body.

[0078] In some embodiments, the battery device further comprises a box body, a first expansion beam and a second expansion beam; the first expansion beam and the second expansion beam are arranged in a spaced manner and jointly define a battery compartment with the box body; and the plurality of battery cells are sequentially arranged in the battery compartment, and the battery cells at the ends are respectively matched with the first expansion beam and the second expansion beam.

[0079] In the above embodiments, the battery cells are constrained by the expansion beams, so that the battery cells can be directly arranged in the battery device to form a battery pack, thereby ensuring the energy density and reliability of the battery device.

[0080] In some embodiments, the battery device further comprises a box body, a module shell and a mounting beam; the plurality of battery cells are arranged in the module shell; and the module shell is mounted in the box body through the mounting beam.

[0081] In the above embodiments, the battery cells are constrained by the module shell, and then the battery device is formed, thereby improving the reliability of the battery device.

[0082] In some embodiments, the battery device further comprises a pressure relief mechanism; the pressure relief mechanism and the pole are respectively arranged on different two surfaces of the battery cell.

[0083] In the above embodiments, when the internal pressure of the battery cell exceeds a threshold value, the pressure relief mechanism is cracked before other walls of the shell, thereby releasing the internal pressure. Since the pressure relief mechanism and the pole are respectively arranged on different two surfaces of the battery cell, the high-temperature medium sprayed by the pressure relief mechanism is less likely to damage the pole and act on the electrical connection position of the battery device, thereby improving the reliability of the battery device.

[0084] In some embodiments, the pressure relief mechanism is arranged on the bottom surface of the battery cell.

[0085] In the above embodiments, the pressure relief mechanism is arranged on the bottom surface of the battery cell, so that the pressure relief mechanism of the battery cell faces downward. When the battery cell is in thermal runaway, the substances in the battery cell can be sprayed to the bottom of the vehicle, thereby reducing the risk of the passenger compartment to a certain extent.

[0086] In a second aspect, the application provides a power consumption device, which comprises the battery device of any one of the above embodiments, and the battery device is used to provide electric energy.

[0087] In the power consumption device of the technical scheme of the application, the sampling member directly contacts the first pole and / or the second pole to collect the parameter information of the corresponding battery cell, which can be adapted to the battery device without a gasket structure design, a gasket structure design that cannot set a sampling structure, etc., thereby improving the adaptability of the sampling mode to the battery device; at the same time, directly collecting the information of the pole can also ensure the accuracy and reliability of the parameter information of the battery cell.

[0088] In some embodiments, the electric device is a vehicle, the battery device comprises a box body, and a plurality of battery cells are arranged in the box body; at least a part of a chassis of the vehicle constitutes an upper cover of the box body.

[0089] In the above embodiments, at least a part of the chassis of the vehicle constitutes the upper cover of the box body, so that the space of the vehicle occupied by the battery device can be reduced, and thus the passenger space of the vehicle can be increased.

[0090] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the above description can be implemented according to the content of the description, and in order to enable the above and other purposes, features and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0091] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in all the drawings represent the same or similar elements. In the drawings:

[0092] FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application;

[0093] FIG. 2 is an exploded structural schematic diagram of a battery device according to some embodiments of the present application;

[0094] FIG. 3 is a partial cross-sectional schematic diagram of a battery device according to some embodiments of the present application;

[0095] FIG. 4 is a schematic diagram of a sampling member according to some embodiments of the present application;

[0096] FIG. 5 is a partial cross-sectional schematic diagram of a battery device according to some embodiments of the present application;

[0097] FIG. 6 is a schematic diagram of a sampling member according to some embodiments of the present application;

[0098] FIG. 7 is a partial cross-sectional schematic diagram of a battery device according to some embodiments of the present application;

[0099] FIG. 8 is a schematic diagram of a sampling member according to some embodiments of the present application;

[0100] FIG. 9 is a partial cross-sectional schematic diagram of a battery device according to some embodiments of the present application;

[0101] FIG. 10 is a schematic diagram of a sampling member according to some embodiments of the present application;

[0102] FIG. 11 is a partial cross-sectional schematic diagram of a battery device according to some embodiments of the present application;

[0103] Fig. 12 is a fifth diagram of a sampling member according to some embodiments of the present application;

[0104] Fig. 13 is a sixth diagram of a battery device according to some embodiments of the present application;

[0105] Fig. 14 is a seventh diagram of a battery device according to some embodiments of the present application;

[0106] Fig. 15 is an eighth diagram of a battery device according to some embodiments of the present application;

[0107] Fig. 16 is a sixth diagram of a sampling portion according to some embodiments of the present application;

[0108] Fig. 17 is a ninth diagram of a battery device according to some embodiments of the present application;

[0109] Fig. 18 is a seventh diagram of a sampling portion according to some embodiments of the present application;

[0110] Fig. 19 is a tenth diagram of a battery device according to some embodiments of the present application;

[0111] Fig. 20 is an eighth diagram of a sampling portion according to some embodiments of the present application;

[0112] Fig. 21 is an eleventh diagram of a battery device according to some embodiments of the present application;

[0113] Fig. 22 is a ninth diagram of a sampling portion according to some embodiments of the present application;

[0114] Fig. 23 is a twelfth diagram of a battery device according to some embodiments of the present application;

[0115] Fig. 24 is a tenth diagram of a sampling portion according to some embodiments of the present application;

[0116] Fig. 25 is an exploded diagram of a battery cell according to some embodiments of the present application;

[0117] Fig. 26 is another diagram of a structure of a battery cell according to some embodiments of the present application;

[0118] Fig. 27 is a diagram of a structure of the battery cell of Fig. 26 in a plan view.

[0119] Reference Signs in the Drawings of the Specific Embodiments:

[0120] Vehicle 1000;

[0121] Battery device 100, controller 200, motor 300;

[0122] Case 10, first portion 11, second portion 12, first expansion beam 13, second expansion beam 14, battery compartment 15, cross beam 16, longitudinal beam 17;

[0123] Battery cell 20, pole 21, insulating piece 22, first pole 23, first recess 231, second recess 232, second pole 24, pole body 241, limiting protrusion 242, third recess 243, shell 25, shell body 252, cover 253, opening 2521, pressure relief mechanism 254, accommodating groove 257, electrode assembly 26, main body 261, tab 262;

[0124] Sampling piece 30, sleeving part 31, first through hole 311, sleeving plate 312, clamping arm 314, plug-in part 316, sampling part 317, fourth recess 318, fifth recess 319, connecting part 32, connecting structure 320, sleeving structure 321, second through hole 322, output line 33;

[0125] Elastic pad 40, through hole 401;

[0126] First extension hole 50, second extension hole 60, elastic ring 70. DETAILED DESCRIPTION

[0127] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0128] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and claims of the present application and the above description of the drawings are intended to cover the non-exclusive inclusion.

[0129] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0130] In this paper, the phrase "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0131] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are in an "or" relationship.

[0132] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0133] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0134] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0135] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0136] In the related art, the battery device includes a sampling structure and a battery cell, and the sampling structure samples the electrical information of the battery cell. Specifically, the two poles of two adjacent battery cells are electrically connected through a gasket, and the sampling structure is connected to the gasket to sample the parameter information of the battery cell. However, with the improvement of the structure of the battery device, the sampling method of the gasket cannot be adapted to various types of battery devices.

[0137] In order to adapt to various types of battery devices and ensure the accuracy and reliability of the battery cell parameter information, the present application provides a battery device, which comprises a plurality of battery cells and a sampling member arranged along a first direction, wherein the battery cell comprises a pole, and in the first direction, the two poles electrically connected between two adjacent battery cells are a first pole and a second pole respectively. The sampling member directly contacts the first pole and / or the second pole to collect the parameter information of the corresponding adjacent battery cell.

[0138] In such a battery device, by directly contacting the first pole and / or the second pole with the sampling member to collect the parameter information of the corresponding battery cell, the adaptability of the sampling method to the battery device can be improved, such as the battery device without a gasket structure design, the gasket structure design cannot set the sampling structure, etc. At the same time, directly collecting the information of the pole can also ensure the accuracy and reliability of the battery cell parameter information.

[0139] The battery device (Battery Apparatus) mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component.

[0140] In some embodiments, the battery cell assembly (Battery Cell Assembly) is usually formed by arranging a plurality of battery cells.

[0141] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0142] In some embodiments, the battery device can be a battery pack, which includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0143] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box body by fixing the battery module in the box body.

[0144] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells in the box body.

[0145] As an example, the box can include a first box and a second box. The first box and the second box are buckled so that the inside of the box forms a closed space to accommodate the battery monomer assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be an upper cover or a bottom plate.

[0146] As an example, the box can include an upper cover, a frame and a bottom plate. The upper cover and the bottom plate are connected with the frame respectively, so that the inside of the box forms a closed space to accommodate the battery monomer assembly.

[0147] In some embodiments, the box can be part of the chassis structure of the vehicle. For example, part of the box can be at least part of the floor of the vehicle, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0148] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery monomers, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0149] The following embodiments are described for convenience with a vehicle 1000 as an example of an electric device of an embodiment of the present application.

[0150] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0151] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0152] Please refer to FIG. 2, which is an exploded structural schematic diagram of a battery device 100 according to some embodiments of the present application. The battery device 100 comprises a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. The box 10 is used to provide a closed space for the battery cell 20, and the box 10 can adopt various structures. In some embodiments, the box 10 can comprise a first part 11 and a second part 12, and the first part 11 and the second part 12 are overlapped with each other, and the first part 11 and the second part 12 jointly define a closed space for containing the battery cell 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate structure, and the first part 11 is overlapped or buckled on the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a closed space; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 is overlapped or buckled on the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0153] In the battery device 100, the battery cell 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel or in a mixed manner. The mixed manner means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel or in a mixed manner, and then the whole of the multiple battery cells 20 is contained in the box 10; of course, the battery device 100 can also be that the multiple battery cells 20 are first connected in series, in parallel or in a mixed manner to form a battery module, and then the multiple battery modules are connected in series, in parallel or in a mixed manner to form a whole, and the whole is contained in the box 10. The battery device 100 can also comprise other structures, for example, the battery device 100 can also comprise a current collecting component for realizing the electrical connection between the multiple battery cells 20.

[0154] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc.

[0155] Please refer to FIGS. 3 to 24, which show a battery device 100 according to some embodiments of the present application. The battery device 100 comprises multiple battery cells 20 and a sampling member 30. The multiple battery cells 20 are arranged along a first direction, and each battery cell 20 comprises a pole 21. In the first direction, the two poles 21 electrically connected between two adjacent battery cells 20 are a first pole 23 and a second pole 24, respectively. The sampling member 30 directly contacts the first pole 23 and / or the second pole 24 to collect parameter information of at least one of the two adjacent battery cells 20.

[0156] The battery device 100 of the technical solution of the present application directly contacts the first pole 23 and / or the second pole 24 through the sampling member 30 to collect the parameter information of the corresponding battery monomer 20, which can be adapted to the battery device 100 without a gasket structure design, a gasket structure design that cannot set up a sampling structure, etc., and can improve the adaptability of the sampling mode to the battery device 100. At the same time, directly collecting the information of the pole 21 can also ensure the accuracy and reliability of the parameter information of the battery monomer 20.

[0157] Specifically, in one embodiment, the sampling member 30 directly contacts the first pole 23 to collect the parameter information of the battery monomer 20 corresponding to the first pole 23. In one embodiment, the sampling member 30 directly contacts the second pole 24 to collect the parameter information of the battery monomer 20 corresponding to the second pole 24. In one embodiment, the sampling member 30 directly contacts the first pole 23 and the second pole 24 to collect the parameter information of the adjacent two battery monomers 20.

[0158] The parameter information includes but is not limited to the voltage and temperature information of the battery monomer 20.

[0159] According to some embodiments of the present application, the contact mode of the sampling member 30 with the pole 21 includes at least one of the following:

[0160] The sampling member 30 directly contacts at least one of the first pole 23 and the second pole 24 in the axial direction L of the pole 21;

[0161] The sampling member 30 directly contacts at least one of the first pole 23 and the second pole 24 in the circumferential direction of the pole 21;

[0162] The sampling member 30 directly contacts at least one of the first pole 23 and the second pole 24 in the radial direction D of the pole 21.

[0163] In FIGS. 3-24, the first direction is the front-rear direction. The circumferential direction of the pole 21 is the direction around the axial direction L of the pole 21, the radial direction D of the pole 21 can be perpendicular to the axial direction L of the pole 21, the first direction can be parallel to the axial direction L of the pole 21, or the first direction can coincide with the axial direction L of the pole 21. In the first direction, the electrical connection mode of the adjacent two battery monomers 20 can be series connection or parallel connection. When the electrical connection mode of the adjacent two battery monomers 20 is series connection, the two poles 21 connected are poles 21 of different types, i.e., one is a positive pole 21 and the other is a negative pole 21. When the electrical connection mode of the adjacent two battery monomers 20 is parallel connection, the two poles 21 connected are poles 21 of the same type, i.e., both are positive poles 21 or both are negative poles 21.

[0164] Optionally, the plurality of battery cells 20 can be arranged in a row along a first direction, and a plurality of rows of battery cells 20 are arranged along a second direction, the first direction being perpendicular to the second direction. In the first direction, two poles 21 of two adjacent battery cells 20 are connected, so that the two adjacent battery cells 20 are electrically connected. In FIG. 2, the first direction is the front-rear direction, the second direction can be the left-right direction, and the third direction can be the up-down direction.

[0165] Optionally, the sampling member 30 can be a voltage sampling member 30 of the battery cell 20, and can sample voltage information of the battery cell 20.

[0166] The sampling member 30 is a contact sampling member 30. The contact mode of the sampling member 30 with the pole includes at least one of the following:

[0167] The sampling member 30 directly contacts at least one of the first pole 23 and the second pole 24 in the axial direction L of the pole 21 (hereinafter referred to as contact mode one), as shown in FIGS. 3-8 and 14-20;

[0168] The sampling member 30 directly contacts at least one of the first pole 23 and the second pole 24 in the circumferential direction of the pole 21 (hereinafter referred to as contact mode two), as shown in FIGS. 9-12 and 21-24;

[0169] The sampling member 30 directly contacts at least one of the first pole 23 and the second pole 24 in the radial direction D of the pole 21 (hereinafter referred to as contact mode three).

[0170] In one embodiment, the contact mode of the sampling member 30 with the pole 21 is contact mode one. In contact mode one, the sampling member 30 can directly contact one of the poles 21, or directly contact the first pole 23 and the second pole 24 in the axial direction L of the pole 21. Contact mode one can be suitable for installing the sampling member 30 in a scenario where the space in the axial direction L of the pole 21 is larger than the space in the circumferential and radial directions D of the pole 21, including but not limited to.

[0171] In one embodiment, the contact mode of the sampling member 30 with the pole 21 is contact mode two. In contact mode two, the sampling member 30 can directly contact one of the first pole 23 and the second pole 24, or directly contact the first pole 23 and the second pole 24 in the circumferential direction of the pole 21. Contact mode two can be suitable for installing the sampling member 30 in a scenario where the space in the circumferential direction of the pole 21 is larger than the space in the axial direction L and the radial direction D of the pole 21, including but not limited to.

[0172] In one embodiment, the contact manner of the sampling member 30 with the pole 21 is contact manner three. In contact manner three, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the radial direction D of the pole 21, or in contact with the first pole 23 and the second pole 24. Contact manner three can be suitable for installing the sampling member 30 in a scenario where there is more space in the radial direction D of the pole 21 and less space in the circumferential direction and the axial direction L of the pole 21, including but not limited to.

[0173] In one embodiment, the contact manner of the sampling member 30 with the pole 21 includes contact manner one and two. Alternatively, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the axial direction L of the pole 21, and in contact with the other of the first pole 23 and the second pole 24 in the circumferential direction of the pole 21. Alternatively, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the axial direction L and the circumferential direction of the pole 21, and directly in contact with the other of the first pole 23 and the second pole 24 in the circumferential direction and the axial direction L of the pole 21. Alternatively, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the axial direction L of the pole 21, and directly in contact with the other of the first pole 23 and the second pole 24 in the axial direction L and the circumferential direction of the pole 21.

[0174] In one embodiment, the contact manner of the sampling member 30 with the pole 21 includes contact manner one and three. Alternatively, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the axial direction L of the pole 21, and directly in contact with the other of the first pole 23 and the second pole 24 in the radial direction D of the pole 21. Alternatively, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the axial direction L and the radial direction D of the pole 21, and directly in contact with the other of the first pole 23 and the second pole 24 in the axial direction L and the radial direction D of the pole 21. Alternatively, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the radial direction D of the pole 21, and directly in contact with the other of the first pole 23 and the second pole 24 in the axial direction L and the radial direction D of the pole 21.

[0175] In one embodiment, the contact mode of the sampling member 30 with the pole 21 includes the contact modes two and three. Optionally, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the circumferential direction of the pole 21, and directly in contact with the other of the first pole 23 and the second pole 24 in the radial direction D of the pole 21. Optionally, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the circumferential direction and the radial direction D of the pole 21, and directly in contact with the other of the first pole 23 and the second pole 24 in the circumferential direction and the radial direction D of the pole 21. Optionally, the sampling member 30 can be directly in contact with one of the first pole 23 and the second pole 24 in the radial direction D of the pole 21, and directly in contact with the other of the first pole 23 and the second pole 24 in the circumferential direction and the radial direction D of the pole 21.

[0176] In one embodiment, the contact mode of the sampling member 30 with the pole 21 is the contact mode one, two and three, and the specific contact mode is explained in the above description, which will not be described in detail here to avoid redundancy.

[0177] In the battery device 100 of the technical solution of the present application, the sampling member 30 is directly in contact with the pole 21 in at least one of the axial direction, the circumferential direction and the radial direction of the pole 21, so as to realize the electrical connection between the sampling member 30 and the pole 21, thereby providing a flexible sampling connection scheme for different pole 21 connection modes, and the arrangement of the sampling member 30 is more flexible, which to some extent alleviates the limitation of the space of the battery device 100 on the sampling member 30.

[0178] Optionally, the material of the sampling member 30 includes but is not limited to nickel, copper and the like. Optionally, the battery monomer 20 includes an insulating member 22, which electrically isolates the pole 21 from the end cover of the battery monomer 20. Optionally, the two poles 21 can be connected by means including but not limited to welding, interference fit, insertion, buckling and the like. In FIGS. 2, 3, 5, 7, 9 and 11, the two poles 21 are connected by means of insertion, i.e., by means of convex-concave fit.

[0179] According to some embodiments of the present application, the first pole 23 is provided with a first groove 231, and a part of the second pole 24 extends into the first groove 231 and is electrically connected with the first pole 23; and the sampling member 30 is abuttingly fitted between the first pole 23 and the second pole 24.

[0180] In the above embodiment, the first pole 23 and the second pole 24 can be connected by means of insertion.

[0181] The shape of the portion of the second pole 24 extending into the first groove 231 and the shape of the first groove 231 are not specifically limited in the present application. Alternatively, the portion of the second pole 24 extending into the first groove 231 is adapted to the shape of the first groove 231. In one example, the portion of the second pole 24 extending into the first groove 231 can be in the shape of a racetrack, and the shape of the first groove 231 is in the shape of a racetrack, and the first groove 231 extends in the second direction.

[0182] Alternatively, the circumferential side surface of the portion of the second pole 24 extending into the first groove 231 is in contact with the circumferential side surface of the first pole 23 facing the first groove 231, thereby achieving the electrical connection of the two poles 21.

[0183] Alternatively, the axial end surface of the portion of the second pole 24 extending into the first groove 231 is in contact with the end surface of the first pole 23 facing the first groove 231, thereby achieving the electrical connection of the two poles 21.

[0184] Alternatively, the circumferential side surface of the portion of the second pole 24 extending into the first groove 231 is in contact with the circumferential side surface of the first pole 23 facing the first groove 231, and the axial end surface of the portion of the second pole 24 extending into the first groove 231 is in contact with the end surface of the first pole 23 facing the first groove 231, thereby achieving the electrical connection of the two poles 21.

[0185] The sampling member 30 is abuttingly fitted between the first pole 23 and the second pole 24, so that the sampling member 30 can collect the parameter information of the battery cell corresponding to the first pole 23 and the parameter information of the battery cell corresponding to the second pole 24.

[0186] Alternatively, the sampling member 30 can be in the form of a spring piece, and the sampling member 30 is elastic. In the above embodiment, when the first pole 23 and the second pole 24 apply pressure to the sampling member 30, the sampling member 30 can be elastically deformed, so that the sampling member 30 can be abuttingly fitted between the first pole 23 and the second pole 24, which is beneficial to improving the connection reliability of the sampling member 30 with the first pole 23 and the second pole 24.

[0187] According to some embodiments of the present application, the sampling member 30 is sleeved on the outside of the second pole 24, and the two side surfaces of the sampling member 30 are respectively in abutment with the first pole 23 and the second pole 24, as shown in FIGS. 3-6 and 9-12.

[0188] In the above embodiment, the sampling member 30 is sleeved on the pole 21, which is convenient to assemble and is not easy to fall off. At the same time, the sampling member 30 sleeved on the pole 21 can also be abuttingly fitted between the first pole 23 and the second pole 24 stably to complete sampling, which can improve the flexibility, reliability and stability of sampling.

[0189] Specifically, the sampling member 30 is provided with a first through hole 311, and the second pole column 24 penetrates the first through hole 311, so that the sampling member 30 is sleeved on the outer side (circumferential side) of the second pole column 24.

[0190] In FIGS. 3-6 and 9-12, the two side surfaces of the sampling member 30 are respectively two end surfaces of the sampling member 30 along the first direction. In FIGS. 3-6 and 9-12, the first direction is the front-rear direction. The two side surfaces of the sampling member 30 respectively abut against the first pole column 23 and the second pole column 24, and the sampling member 30 can abut against the first pole column 23 and the second pole column 24 in a manner of end surface contact, so that the sampling member 30 is stably abutted and fitted between the first pole column 23 and the second pole column 24 to complete sampling, which can improve the flexibility, reliability and stability of sampling. The sampling member 30 can collect parameter information of the battery monomer corresponding to the first pole column 23 and parameter information of the battery monomer corresponding to the second pole column 24.

[0191] In addition, the sleeving manner facilitates the assembly of the sampling member 30 and the second pole column 24. Specifically, during assembly, the second pole column 24 penetrates the first through hole 311, and the two side surfaces of the sampling member 30 respectively abut against the first pole column 23 and the second pole column 24, so that the sampling member 30 is assembled with the second pole column 24, and the assembly is convenient. The two side surfaces of the sampling member 30 respectively abut against the first pole column 23 and the second pole column 24, so that the sampling member 30 is clamped by the first pole column 23 and the second pole column 24, and the sampling member 30 is not easy to fall off.

[0192] According to some embodiments of the present application, optionally, in combination with FIGS. 3-6 and 9-12, the second pole column 24 comprises a pole column body 241 and a limiting protrusion 242 protruding from the circumferential side of the pole column body 241; the pole column body 241 extends into the first recess 231 and is electrically connected with the first pole column 23, the sampling member 30 is sleeved on the outer side of the pole column body 241, and one side surface of the sampling member 30 abuts against the limiting protrusion 242, and the other side surface of the sampling member 30 abuts against the wall of the first pole column 23 at the slot opening of the first recess 231.

[0193] In the above embodiments, on the one hand, by providing the limiting protrusion 242, the sampling member 30 can be limited, and the sampling member 30 is prevented from moving towards the root of the pole column 21 to directly contact the shell 25, thereby preventing wear and tear; on the other hand, by providing the limiting protrusion 242, when the sampling member 30 is sampling, it can be abutted between the limiting protrusion 242 and the first pole column 23, the sampling structure is stable and reliable, and the sampling operation is facilitated, so as to ensure the stability and reliability of sampling.

[0194] Specifically, the limiting protrusion 242 is protruded on the circumferential side of the pole body 241, so that when the sampling piece 30 is assembled to the second pole 24, the pole body 241 can pass through the first through hole 311, and the limiting protrusion 242 is close to the sampling piece 30, until the side surface of the sampling piece 30 abuts against the limiting protrusion 242, so that the limiting protrusion 242 can limit the sampling piece 30, prevent the sampling piece 30 from moving towards the root of the pole 21, and directly contact the shell 25, thereby preventing wear and tear.

[0195] Then, the first pole 23 can be inserted and assembled with the pole body 241, the pole body 241 is inserted into the first groove 231, and the sampling piece 30 is close to the first pole 23, so that the wall body of the first pole 23 located at the notch of the first groove 231 abuts against the other side surface of the sampling piece 30, thereby completing the assembly of the sampling piece 30, the first pole 23 and the second pole 24, and the assembly efficiency is high.

[0196] Since the side surface of the sampling piece 30 abuts against the limiting protrusion 242, and the other side surface of the sampling piece 30 abuts against the wall body of the first pole 23 located at the notch of the first groove 231, the sampling piece 30 can be supported between the limiting protrusion 242 and the first pole 23, the sampling structure is stable and reliable, and the sampling operation is facilitated, so as to ensure the stability and reliability of sampling.

[0197] Optionally, the limiting protrusion 242 can be continuously protruded on the circumferential side of the pole body 241 along the circumferential direction of the pole body 241, the contact area between the limiting protrusion 242 and the sampling piece 30 is large, and the connection is reliable.

[0198] According to some embodiments of the present application, optionally, please refer to FIGS. 3-6 and 9-12, the sampling piece 30 comprises a connecting portion 32 and a sleeving portion 31, the sleeving portion 31 is connected to the connecting portion 32, the sleeving portion 31 is sleeved outside the second pole 24, and the two side surfaces of the sleeving portion 31 abut against the first pole 23 and the second pole 24 respectively; the connecting portion 32 is connected with the output line 33 of sampling.

[0199] In the above embodiments, the sampling piece 30 is divided into two parts which are connected, one part realizes sampling and structural connection, and the other part realizes signal output, so as to ensure the stability and reliability of the sampling piece 30.

[0200] Specifically, the sleeving portion 31 is sleeved outside the second pole 24, so that the sleeving portion 31 can realize the structural connection between the sampling piece 30 and the second pole 24. The two side surfaces of the sleeving portion 31 abut against the first pole 23 and the second pole 24 respectively, so that the sleeving portion 31 can realize the sampling function of the sampling piece 30 on the parameter information of the battery monomer 20 corresponding to the first pole 23 and the parameter information of the battery monomer 20 corresponding to the second pole 24.

[0201] Optionally, in an embodiment, the second pole post 24 comprises a pole post body 241 and a limiting protrusion 242, and the sleeving part 31 is provided with a first through hole 311 and is sleeved on the outer side of the pole post body 241. The two side surfaces of the sleeving part 31 along the first direction are respectively in abutment with the first pole post 23 and the limiting protrusion 242, so that the sampling member 30 can collect the parameter information of the battery cell corresponding to the first pole post 23 and the parameter information of the battery cell corresponding to the second pole post 24 through the sleeving part 31.

[0202] The connecting part 32 can be connected with the output line 33 for sampling, so that the parameter information of the battery cell can be transmitted to the output line 33 through the connecting part 32, and the output line 33 is provided to facilitate the transmission of the parameter information of the battery cell to the control unit, such as the control unit for voltage sampling, so as to realize the output of the signal.

[0203] The two side surfaces of the sleeving part 31 are respectively in abutment with the first pole post 23 and the second pole post 24, which is beneficial to improve the sampling reliability of the sleeving part 31 with the first pole post 23 and the second pole post 24.

[0204] Optionally, the connecting part 32 and the sleeving part 31 are integrally formed, which is beneficial to the structural integrity of the sampling member 30 and reduces or avoids the gap formed by the connection of the connecting part 32 and the sleeving part 31, so as to reduce the internal resistance of the sampling member 30. The sampling member 30 with reduced internal resistance can reduce the signal loss representing the parameter information, so as to improve the accuracy of the parameter information of the battery cell. In an example, the material of the sampling member 30 is metal, and the metal sheet can be manufactured into the sampling member 30 through stamping, bending and other processes. Optionally, the sampling member 30 can also be a split structure, and the connecting part 32 and the sleeving part 31 can be connected through methods including but not limited to welding.

[0205] According to some embodiments of the present application, optionally, please refer to FIGS. 3-6 and 9-12, the sleeving part 31 comprises a sleeving plate 312, the first through hole 311 is formed on the sleeving plate 312, and the sleeving plate 312 is sleeved on the second pole post 24 through the first through hole 311.

[0206] In the above embodiment, the sampling member 30 can be in abutment with the first pole post 23 and the second pole post 24 through the sleeving plate 312, and the contact area of the sampling member 30 with the first pole post 23 and the second pole post 24 is large, which is beneficial to maintain the connection stability of the sampling member 30 with the first pole post 23 and the second pole post 24.

[0207] Specifically, the two sides of the sleeve plate 312 along the first direction are both flat, and the flat sides abut against the first pole column 23 and the second pole column 24, so that the contact area of the sampling member 30 with the first pole column 23 and the second pole column 24 is large, and the sampling member 30 is not easily separated from the first pole column 23 and the second pole column 24 to cause disconnection and failure to collect the parameter information of the battery monomer, thereby facilitating the stability of the connection of the sampling member 30 with the first pole column 23 and the second pole column 24.

[0208] Optionally, the sleeve plate 312 is elastic, and the two sides of the sleeve plate 312 along the first direction abut against the first pole column 23 and the second pole column 24 respectively. When the sleeve plate 312 is pressed by the first pole column 23, the sleeve plate 312 can elastically deform and provide a certain elastic force to the first pole column 23, so that the contact between the sleeve plate 312 and the first pole column 23 is more close; when the sleeve plate 312 is pressed by the second pole column 24, the sleeve plate 312 can provide a certain elastic force to the second pole column 24, so that the contact between the sleeve plate 312 and the second pole column 24 is more close, thereby ensuring the effective contact between the side of the sleeve plate 312 and the end face of the pole column to a certain extent through the abutment between the sleeve plate 312 and the pole column, and improving the reliability of the connection between the sampling member 30 and the pole column to a certain extent.

[0209] According to some embodiments of the present application, optionally, in combination with FIGS. 5-6 and 9-10, the end of the sleeve plate 312 away from the connecting part 32 is also provided with a first extension hole 50 extending from the edge of the sleeve plate 312 to communicate with the first through hole 311.

[0210] In the above embodiments, the provision of the first extension hole 50 allows the sleeve plate 312 to deform to adapt to the size of the pole column body 241 when sleeving the pole column body 241, thereby reducing the probability of scratching the pole column body 241 during assembly, and ensuring that the sampling member 30 is conveniently assembled to the pole column body 241. At the same time, during installation, the pole column body 241 can be clamped into the first through hole 311 from the first extension hole 50, thereby realizing the assembly of the sampling member 30 to the second pole column 24.

[0211] Specifically, if the size of the pole column body 241 is small, the pole column body 241 does not or less expand the first extension hole 50 when the sleeve plate 312 is sleeved on the pole column body 241, at this time, the size of the first extension hole 50 is small. If the size of the pole column body 241 is large, the pole column body 241 expands the first extension hole 50 more when the sleeve plate 312 is sleeved on the pole column body 241, at this time, the size of the first extension hole 50 is large, thereby facilitating the deformation of the sleeve plate 312 to adapt to the size of the pole column body 241 by providing the first extension hole 50.

[0212] In FIGS. 5-6 and 9-10, the pole body 241 of the second pole 24 penetrates the first through hole 311. In FIG. 5, the front side of the sampling member 30 abuts against the end face of the pole body 241, and the back side of the sampling member 30 abuts against the wall of the first pole 23 at the notch of the first groove 231. In FIG. 6, the sleeve part 31 includes two sleeve plates 312, each of which is provided with the first extension hole 50.

[0213] Optionally, the periphery of the first through hole 311 of the sleeve plate 312 abuts against the circumferential side of the pole body 241 of the second pole 24. Optionally, the front side of the sleeve part 31 can abut against the end face of the limiting protrusion 242, and the back side of the sleeve part 31 can abut against the wall of the first pole 23 at the notch of the first groove 231.

[0214] According to some embodiments of the present application, as shown in FIGS. 5-6 and 9-10, the size of the first extension hole 50 is smaller than the size of the first through hole 311.

[0215] In the above embodiments, the small size of the first extension hole 50 can ensure the stability and reliability of the cooperation between the sampling member 30 and the pole 21.

[0216] The size of the first extension hole 50 is smaller than the size of the first through hole 311, so that the sampling member 30 is not easy to fall off the pole body 241, and the sampling member 30 can be closely combined with the pole 21, thereby ensuring the stability and reliability of the cooperation between the sampling member 30 and the pole 21. Specifically, in FIGS. 6 and 10, the first through hole 311 is a circular hole, and the width of the first extension hole 50 is smaller than the diameter of the first through hole 311. In an embodiment, the first through hole 311 is a square hole, and the width of the first extension hole 50 is smaller than the length of the side of the first through hole 311. It can be understood that in other embodiments, the shape of the first through hole 311 can also be other regular or irregular shapes, and is not limited to circular holes and square holes.

[0217] According to some embodiments of the present application, as shown in FIGS. 5-6 and 9-10, the sleeve plate 312 is further provided with a second extension hole 60 near one end of the connecting part 32, and the second extension hole 60 extends from the connecting part 32 to communicate with the first through hole 311.

[0218] In the above embodiment, when the sampling member 30 is installed, the pole body 241 is clamped into the first through hole 311 from the first extension hole 50. During the clamping process, the pole body 241 extrudes the sleeve plate 312, so that the distance between the two clamping arms 314 at the first extension hole 50 is increased. The second extension hole 60 is arranged so that the two clamping arms 314 are more easily extruded by the pole body 241, thereby facilitating the assembly of the pole body 241 and the sleeve portion 31, and improving the assembly efficiency of the pole body 241 and the sampling member 30.

[0219] Optionally, the second extension hole 60 corresponds to the first extension hole 50 in the radial direction D of the pole 21. The sleeve plate 312 is formed with two clamping arms 314. In the radial direction D of the pole 21, the first through hole 311 is located between the second extension hole 60 and the first extension hole 50.

[0220] According to some embodiments of the present application, optionally, in combination with FIGS. 3-6, the number of sleeve plates 312 is two, and the two sleeve plates 312 are arranged at intervals on the connecting portion 32. One of the two sleeve plates 312 abuts against the second pole 24, and the other of the two sleeve plates 312 abuts against the first pole 23.

[0221] Optionally, in one embodiment, the sampling member 30 can be a one-piece structure, i.e., the two sleeve plates 312 are integrally formed. In one embodiment, the material of the sampling member 30 is metal, and the sampling member 30 can be manufactured by stamping and bending a metal sheet. Alternatively, the sampling member 30 can also be a split structure, and the two sleeve plates 312 can be connected by means including but not limited to welding and bolting.

[0222] The two sleeve plates 312 are elastically arranged at intervals on the connecting portion 32. One of the two sleeve plates 312 abuts against the first pole 23, and the other of the two sleeve plates 312 abuts against the second pole 24. When one of the sleeve plates 312 is pressed by the first pole 23, the sleeve plate 312 can elastically deform towards the other sleeve plate 312. The two sleeve plates 312 arranged at intervals can provide space for the deformation of the sleeve plates 312. The sleeve plate 312 that elastically deforms can provide a certain elastic force to the first pole 23, so that the sleeve plate 312 abuts against the first pole 23 more tightly. When the other sleeve plate 312 is pressed by the second pole 24, the sleeve plate 312 can provide a certain elastic force to the second pole 24, so that the sleeve plate 312 abuts against the second pole 24 more tightly. Thus, the abutment of the sleeve plates 312 and the poles 21 ensures effective contact between the sleeve plates 312 and the poles 21 to some extent, and improves the reliability of the sampling member 30 to some extent.

[0223] According to some embodiments of the present application, optionally, please refer to FIG. 7 and FIG. 8, the sleeving part 31 further comprises an elastic pad 40 arranged on one side of the sleeving plate 312, the elastic pad 40 is provided with a through hole 401 matched with the first through hole 311, and the sleeving plate 312 and the elastic pad 40 are sleeved on the second pole 24 through the first through hole 311 and the through hole 401; the elastic pad 40 abuts against the first pole 23, and the side of the sleeving part 31 away from the elastic pad 40 abuts against the second pole 24.

[0224] The elastic pad 40 can have a certain elasticity, please refer to FIG. 7 and FIG. 8, the elastic pad 40 is located between one side of the sleeving plate 312 along the first direction and the end surface of the first pole 23.

[0225] Optionally, in FIG. 7, the sleeving plate 312 and the elastic pad 40 are sleeved on the pole body 241 of the second pole 24 through the first through hole 311 and the through hole 401.

[0226] The elastic pad 40 abuts against the first pole 23, and the side of the sleeving part 31 away from the elastic pad 40 abuts against the second pole 24, so that the elastic pad 40 is located between the sleeving plate 312 and the first pole 23 in a manner of interference fit, and the elastic pad 40 is in a compressed state. The elastic pad 40 can apply a pressure to the sleeving plate 312, and the pressure can realize effective contact between the sleeving plate 312 and the second pole 24. The elastic pad 40 includes but is not limited to foam.

[0227] According to some embodiments of the present application, optionally, please refer to FIG. 11 and FIG. 12, the sleeving plate 312 is provided with an elastic ring 70 around the first through hole 311, and the sleeving plate 312 is sleeved on the second pole 24 through the elastic ring 70.

[0228] Optionally, the elastic ring 70 is conductive, and can form an electrical connection between the sleeving plate 312 around the first through hole 311 and the second pole 24. In FIG. 11, the first pole 23 is provided with a first groove 231, the pole body of the second pole 24 extends into the first groove 231, the pole body of the second pole 24 penetrates the first through hole 311, and the elastic ring 70 is located between the sleeving plate 312 around the first through hole 311 and the circumferential side surface of the pole body 241 of the second pole 24.

[0229] The sleeving plate 312 is sleeved on the second pole 24 through the elastic ring 70, and the elastic ring 70 can absorb a certain vibration, so that the sampling piece 30 can also maintain effective contact with the second pole 2421 to a certain extent in the case of vibration impact on the battery monomer 20 or the electrical device.

[0230] Please refer to FIG. 11 and FIG. 12, the elastic ring 70 can be arranged between the circumferential edge of the first through hole 311 of the sleeving plate 312 and the second pole 24 along the circumferential direction 360 degrees of the pole 21, so that the contact area between the elastic ring 70 and the second pole 24 can be large, and the elastic ring 70 can be damped in all directions.

[0231] The elastic ring 70 includes but is not limited to a ring, a spring piece, a spring, etc. The ring can be a ring structure formed by connecting the head end and the tail end of a helical spring.

[0232] According to some embodiments of the present application, optionally, the circumferential edge of the first through hole 311 of the sleeving plate 312 is provided with a receiving groove, and at least a part of the elastic ring 70 is accommodated in the receiving groove.

[0233] At least a part of the elastic ring 70 is accommodated in the receiving groove, and when the elastic ring 70 is installed, the elastic ring 70 can be positioned through the receiving groove, facilitating the installation of the elastic ring 70. When the sampling piece 30 and the pole 21 are assembled, the elastic ring 70 is also not easy to fall off from the sampling piece 30.

[0234] Optionally, the shape of the receiving groove is matched with the shape of the elastic ring 70. For example, the cross section of the elastic ring 70 is circular, and the cross section of the receiving groove is circular arc, and the radius of the circular arc is the same as the radius of the circle.

[0235] According to some embodiments of the present application, optionally, please refer to FIG. 13 to FIG. 24, the sampling piece 30 is inserted with the first pole 23 and the second pole 24 to electrically connect the first pole 23 and the second pole 24.

[0236] In the above embodiments, the sampling piece 30 and the first pole 23 and the second pole 24 can be electrically connected through the insertion, which can improve the assembly efficiency of the sampling piece 30 and the first pole 23 and the second pole 24 to a certain extent.

[0237] The sampling piece 30 is electrically connected with the first pole 23 and the second pole 24, so that the parameter information of the battery monomer corresponding to the first pole 23 and the parameter information of the battery monomer corresponding to the second pole 24 can be collected.

[0238] According to some embodiments of the present application, optionally, please refer to FIG. 13, FIG. 15 to FIG. 24, the first pole 23 is provided with a second groove 232, and the second pole 24 is provided with a third groove 243; the sampling piece 30 includes an insertion part 316 and a sampling part 317, both ends of the insertion part 316 are respectively inserted with the second groove 232 and the third groove 243, and the sampling part 317 is connected with the insertion part 316 and is used for sampling.

[0239] In the above embodiment, the sampling member 30 can be inserted into the second groove 232 and the third groove 243 through the insertion portion 316, respectively, so as to electrically connect the first pole 23 and the second pole 24.

[0240] Specifically, the two ends of the insertion portion 316 are respectively inserted into the second groove 232 and the third groove 243, so that the insertion portion 316 can have a large contact area with the first pole 23 and the second pole 24, which is conducive to the stable connection of the insertion portion 316 with the first pole 23 and the second pole 24, and the assembly efficiency of the insertion portion 316 with the first pole 23 and the second pole 24 is high.

[0241] According to some embodiments of the present application, as shown in FIG. 14, the sampling member 30 includes an insertion portion 316 and a sampling portion 317, the insertion portion 316 is provided with a fourth groove 318 and a fifth groove 319, the first pole 23 and the second pole 24 are respectively inserted into the fourth groove 318 and the fifth groove 319, and the sampling portion 317 is connected with the insertion portion 316 and is used for sampling.

[0242] In the above embodiment, the first pole 23 and the second pole 24 can be respectively inserted into the fourth groove 318 and the fifth groove 319, so as to electrically connect the insertion portion 316, which can greatly simplify the electrical connection structure between the poles 21, improve the convenience of the electrical connection structure, and ensure the stability of the electrical connection.

[0243] Specifically, the insertion portion 316 is provided with the fourth groove 318 on the side facing the first pole 23 and the fifth groove 319 on the side facing the second pole 24, and the first pole 23 and the second pole 24 are respectively inserted into the fourth groove 318 and the fifth groove 319, so that the insertion portion 316 can have a large contact area with the first pole 23 and the second pole 24, which is conducive to the stable connection of the insertion portion 316 with the first pole 23 and the second pole 24, and the assembly efficiency of the insertion portion 316 with the first pole 23 and the second pole 24 is high.

[0244] When the sampling member 30, the first pole 23 and the second pole 24 are assembled, the first pole 23 and the second pole 24 can be respectively inserted into the fourth groove 318 and the fifth groove 319, so that the sampling member 30 is electrically connected with the first pole 23 and the second pole 24. The first pole 23 and the second pole 24 can be electrically connected through the sampling member 30, which reduces the additional electrical connection structure for connecting the first pole 23 and the second pole 24, thereby greatly simplifying the electrical connection structure between the poles 21, improving the convenience of the electrical connection structure, and ensuring the stability of the electrical connection.

[0245] According to some embodiments of the present application, the sampling part 317 is integrally formed with the plug-in part 316.

[0246] In the above embodiments, the gap formed when the sampling part 317 is connected with the plug-in part 316 can be reduced or avoided, which is beneficial to reduce the internal resistance of the sampling member 30 and prevent the sampling member 30 from overheating and being damaged to some extent.

[0247] Specifically, the integrally formed sampling part 317 and plug-in part 316 can reduce or avoid the gap formed when the sampling part 317 is connected with the plug-in part 316, thereby reducing the internal resistance of the sampling member 30. The smaller internal resistance can reduce the heat generation of the sampling member 30 during the process of collecting the parameter information of the battery monomer, thereby preventing the sampling member 30 from overheating and being damaged to some extent. Moreover, the sampling member 30 with smaller internal resistance can also reduce the signal loss of the parameter information, which is beneficial to improve the accuracy of the parameter information of the battery monomer. In one example, the material of the sampling member 30 is metal, and the metal sheet can be manufactured into the sampling member 30 through stamping, bending and other processes.

[0248] According to some embodiments of the present application, as shown in FIGS. 13, 15-18, 21-24, the sampling part 317 is sleeved on the outside of the plug-in part 316, and the two side surfaces of the sampling part 317 respectively abut against the first pole 23 and the second pole 24.

[0249] In the above embodiments, the sampling part 317 is sleeved on the plug-in part 316, which is convenient to assemble and not easy to fall off. At the same time, the sampling part 317 sleeved on the plug-in part 316 can also be stably abutted and matched between the first pole 23 and the second pole 24 to complete sampling, which can improve the flexibility, reliability and stability of sampling.

[0250] Specifically, the sampling part 317 is provided with a second through hole 322, and the plug-in part 316 penetrates the second through hole 322, so that the sampling part 317 is sleeved on the outside (circumferential surface) of the plug-in part 316.

[0251] The two side surfaces of the sampling part 317 are two end surfaces of the sampling part 317 along the first direction. In the drawings, the first direction is the front-rear direction. The two side surfaces of the sampling part 317 respectively abut against the first pole 23 and the second pole 24, and the sampling part 317 can abut against the first pole 23 and the second pole 24 in a way of end surface contact, so as to stably abut and match between the first pole 23 and the second pole 24 to complete sampling, which can improve the flexibility, reliability and stability of sampling. The sampling part 317 can collect the parameter information of the battery monomer corresponding to the first pole 23 and the parameter information of the battery monomer corresponding to the second pole 24.

[0252] In addition, the sleeving manner facilitates the assembly of the sampling portion 317 and the plug-in portion 316. Specifically, during assembly, the plug-in portion 316 passes through the second through hole 322, and the two side surfaces of the sampling portion 317 are respectively in abutment with the first pole 23 and the second pole 24, so that the sampling portion 317 and the plug-in portion 316 are assembled, and the assembly is convenient. The two side surfaces of the sampling portion 317 are respectively in abutment with the first pole 23 and the second pole 24, so that the sampling portion 317 is clamped by the first pole 23 and the second pole 24, and the sampling portion 317 is not easy to fall off.

[0253] According to some embodiments of the present application, the sampling portion 317 includes a connecting structure 320 and a sleeving structure 321, the sleeving structure 321 cooperates with the connecting structure 320, the sleeving structure 321 is sleeved outside the plug-in portion 316, and the two side surfaces of the sleeving structure 321 are respectively in abutment with the first pole 23 and the second pole 24; the connecting structure 320 is connected with the output line 33 of sampling.

[0254] In the above embodiments, the sampling portion 317 is divided into two parts connected and arranged, one part realizes sampling and structural connection, and the other part realizes signal output, so as to ensure the stability and reliability of the sampling portion 317.

[0255] Specifically, the sleeving structure 321 is sleeved outside the plug-in portion 316, so that the sleeving structure 321 can realize the structural connection between the sampling portion 317 and the plug-in portion 316. The two side surfaces of the sleeving structure 321 are respectively in abutment with the first pole 23 and the second pole 24, so that the sleeving structure 321 can realize the sampling function of the sampling portion 317 on the parameter information of the battery monomer 20 corresponding to the first pole 23 and the parameter information of the battery monomer 20 corresponding to the second pole 24.

[0256] Please refer to FIG. 13, FIG. 15 to FIG. 18, FIG. 21 to FIG. 24, the two side surfaces of the sleeving structure 321 along the first direction are respectively in abutment with the first pole 23 and the second pole 24, so that the sampling piece 30 can collect the parameter information of the battery monomer corresponding to the first pole 23 and the parameter information of the battery monomer corresponding to the second pole 24 through the sleeving structure 321.

[0257] The connecting structure 320 can be connected with the output line 33 of sampling, so that the parameter information of the battery monomer can be transmitted to the output line 33 through the connecting structure 320. The output line 33 is arranged to facilitate the transmission of the parameter information of the battery monomer to the control unit, such as the control unit of voltage sampling, so as to realize the output of the signal.

[0258] When the sampling member 30, the first pole 23 and the second pole 24 are assembled, one end of the insertion part 316 can be inserted into the first pole 23 or the second pole 24 first, and one side surface of the sleeving structure 321 can abut against the first pole 23 or the second pole 24, and then the other end of the insertion part 316 is inserted into the second pole 24 or the first pole 23, so that the second pole 24 or the first pole 23 abuts against the other side surface of the sleeving structure 321, thereby completing the assembly of the sampling member 30, the first pole 23 and the second pole 24, and the assembly efficiency is high.

[0259] Optionally, the sleeving structure 321 can be continuously sleeved on the circumferential side surface of the insertion part 316 along the circumferential direction of the insertion part 316, and the contact area between the sleeving structure 321 and the first pole 23 and the second pole 24 is large, and the connection is reliable.

[0260] Optionally, the connecting structure 320 and the sleeving structure 321 are integrally formed, which is beneficial to the structural integrity of the sampling part 317, reduces or avoids the gap formed by the connection of the connecting structure 320 and the sleeving structure 321, thereby reducing the internal resistance of the sampling part 317, the sampling part 317 with reduced internal resistance can reduce signal loss of the representative parameter information, thereby improving the accuracy of the parameter information of the battery monomer. In one example, the material of the sampling part 317 is metal, and the sampling part 317 can be manufactured by stamping, bending and the like. Optionally, the sampling part 317 can also be a split structure, and the connecting structure 320 and the sleeving structure 321 can be connected by means including but not limited to welding and the like.

[0261] According to some embodiments of the present application, optionally, in combination with FIGS. 13, 15-18, 21-24, the sleeving structure 321 includes a sleeving plate 312, and the sleeving plate 312 is sleeved on the insertion part 316 through the second through hole 322.

[0262] In the above embodiments, the sampling member 30 can abut against the first pole 23 and the second pole 24 through the sleeving plate 312, and the contact area between the sampling member 30 and the first pole 23 and the second pole 24 is large, which is beneficial to maintaining the connection stability of the sampling member 30 and the first pole 23 and the second pole 24.

[0263] Specifically, the two side surfaces of the sleeving plate 312 along the first direction are in a planar shape, and the planar side surfaces abut against the first pole 23 and the second pole 24, thereby increasing the contact area between the sampling member 30 and the first pole 23 and the second pole 24, and the sampling member 30 and the first pole 23 and the second pole 24 are not easily separated to cause disconnection and fail to collect the parameter information of the battery monomer, thereby being beneficial to maintaining the connection stability of the sampling member 30 and the first pole 23 and the second pole 24.

[0264] Optionally, the sleeve plate 312 is elastic, and two side surfaces of the sleeve plate 312 along the first direction abut against the first pole 23 and the second pole 24 respectively. When the sleeve plate 312 is pressed by the first pole 23, the sleeve plate 312 can elastically deform and provide a certain elastic force to the first pole 23, so that the contact between the sleeve plate 312 and the first pole 23 is more close; when the sleeve plate 312 is pressed by the second pole 24, the sleeve plate 312 can provide a certain elastic force to the second pole 24, so that the contact between the sleeve plate 312 and the second pole 24 is more close, thereby ensuring the effective contact between the side surface of the sleeve plate 312 and the end surface of the pole to a certain extent through the abutment between the sleeve plate 312 and the pole, and improving the reliability of the connection between the sampling member 30 and the pole to a certain extent.

[0265] According to some embodiments of the present application, optionally, in combination with FIGS. 17-18 and 21-22, the end of the sleeve plate 312 away from the connecting portion 32 is further provided with a first extension hole 50 extending from the edge of the sleeve plate 312 to communicate with the second through hole 322.

[0266] In the above embodiments, the first extension hole 50 is provided, so that the sleeve plate 312 can be deformed to adapt to the size of the plug-in portion 316 when sleeved on the plug-in portion 316, thereby reducing the probability of scratching the plug-in portion 316 during assembly, thereby ensuring that the sampling portion 317 is conveniently assembled to the plug-in portion 316. At the same time, during installation, the plug-in portion 316 can be clamped into the first through hole 311 from the first extension hole 50, thereby realizing the assembly of the sampling portion 317 to the plug-in portion 316.

[0267] Specifically, if the size of the plug-in portion 316 is small, when the sleeve plate 312 is sleeved on the plug-in portion 316, the plug-in portion 316 does not or less expands the first extension hole 50, at this time, the size of the first extension hole 50 is small. If the size of the plug-in portion 316 is large, when the sleeve plate 312 is sleeved on the plug-in portion 316, the plug-in portion 316 expands the first extension hole 50 more, at this time, the size of the first extension hole 50 is large, thereby facilitating the deformation of the sleeve plate 312 to adapt to the size of the plug-in portion 316 by providing the first extension hole 50.

[0268] In FIGS. 17-18 and 21-22, the plug-in portion 316 penetrates the second through hole 322. In FIG. 17, the front side surface of the sleeve plate 312 abuts against the end surface of the second pole 24, and the rear side surface of the sleeve plate 312 abuts against the first pole 23. In FIG. 17, the sleeve plate 312 includes two sleeve plates 312, and each of the two sleeve plates 312 is provided with the first extension hole 50.

[0269] Optionally, the periphery of the second through hole 322 of the sleeving plate 312 abuts against the circumferential side of the plug-in part 316. Optionally, the front side of the sleeving plate can abut against the second pole column 24, and the back side of the sleeving plate can abut against the first pole column 23.

[0270] According to some embodiments of the present application, as shown in FIGS. 17-18 and 21-22, the first extension hole 50 has a size smaller than that of the second through hole 322.

[0271] In the above embodiments, the small size of the first extension hole 50 can ensure the stability and reliability of the sampling part 317 and the plug-in part 316.

[0272] The small size of the first extension hole 50 relative to the second through hole 322 can prevent the sleeving structure 321 from falling off the plug-in part 316, and the sampling part 317 can be combined closely with the plug-in part 316, thereby ensuring the stability and reliability of the cooperation between the sampling part 317 and the plug-in part 316. Specifically, as shown in FIGS. 18 and 22, the second through hole 322 is a circular hole, and the width of the first extension hole 50 is smaller than the diameter of the second through hole 322. In an embodiment, the second through hole 322 is a square hole, and the width of the first extension hole 50 is smaller than the length of the side of the second through hole 322. It can be understood that in other embodiments, the shape of the second through hole 322 can also be other regular or irregular shapes, and is not limited to circular holes and square holes.

[0273] According to some embodiments of the present application, as shown in FIGS. 17-18 and 21-22, the end of the sleeving plate 312 close to the connecting structure 320 is further provided with a second extension hole 60, and the second extension hole 60 extends from the connecting structure 320 to communicate with the second through hole 322.

[0274] In the above embodiments, when the sleeving structure 321 is installed, the plug-in part 316 is clamped into the second through hole 322 from the first extension hole 50. During the clamping process, the distance between the two clamping arms 314 at the first extension hole 50 is increased due to the extrusion of the plug-in part 316 on the sleeving plate 312. The provision of the second extension hole 60 makes the two clamping arms 314 more easily extruded apart by the plug-in part 316, thereby making the assembly of the plug-in part 316 and the sleeving structure easier and improving the assembly efficiency of the plug-in part 316 and the sleeving structure 321.

[0275] Optionally, the second extension hole 60 corresponds to the first extension hole 50 in the radial direction D of the pole column 21, the sleeving plate 312 is formed with two clamping arms 314, and the second through hole 322 is located between the second extension hole 60 and the first extension hole 50 in the radial direction D of the pole column 21.

[0276] According to some embodiments of the present application, as shown in FIGS. 15-18, the number of the sleeve plates 312 is two, and the two sleeve plates 312 are arranged at intervals on the connecting structure 320. One of the two sleeve plates 312 is in abutment with the second pole 24, and the other of the two sleeve plates 312 is in abutment with the first pole 23.

[0277] Optionally, in an embodiment, the sleeve structure 321 can be a one-piece structure, i.e., the two sleeve plates 312 are integrally formed. In an embodiment, the sleeve structure 321 is made of metal, and the sleeve structure 321 can be manufactured by stamping and bending a metal sheet. Alternatively, the sleeve structure 321 can also be a split structure, and the two sleeve plates 312 can be connected by means including but not limited to welding and bolting.

[0278] The two sleeve plates 312 are elastically arranged at intervals on the connecting structure 320. One of the two sleeve plates 312 is in abutment with the first pole 23, and the other of the two sleeve plates 312 is in abutment with the second pole 24. When the one sleeve plate 312 is pressed by the first pole 23, the sleeve plate 312 can elastically deform towards the other sleeve plate 312. The two sleeve plates 312 arranged at intervals can provide a space for the deformation of the sleeve plates 312. The one sleeve plate 312 that elastically deforms can provide a certain elastic force to the first pole 23, so that the sleeve plate 312 is more tightly in abutment with the first pole 23. The other sleeve plate 312 that is pressed by the second pole 24 can provide a certain elastic force to the second pole 24, so that the sleeve plate 312 is more tightly in abutment with the second pole 24. Thus, the abutment of the sleeve plates 312 with the poles 21 ensures the effective contact of the sleeve plates 312 with the poles 21 to a certain extent, and improves the reliability of the sampling member 30 to a certain extent.

[0279] According to some embodiments of the present application, as shown in FIGS. 19-20, the sleeve structure 321 further includes an elastic pad 40 arranged on one side of the sleeve plate 312. The elastic pad 40 is provided with a through hole 401 adapted to the second through hole 322. The sleeve plate 312 and the elastic pad 40 are sleeved on the insertion portion 316 through the second through hole 322 and the through hole 401. The elastic pad 40 is in abutment with the first pole 23, and the side of the sleeve portion 31 away from the elastic pad 40 is in abutment with the second pole 24.

[0280] The elastic pad 40 can have a certain elasticity. As shown in FIGS. 19-20, the elastic pad 40 is arranged between one side of the sleeve plate 312 along the first direction and the end surface of the first pole 23.

[0281] The elastic pad 40 is in abutment with the first pole 23, and the side of the sleeving portion 31 away from the elastic pad 40 is in abutment with the second pole 24, so that the elastic pad 40 can be located between the sleeving plate 312 and the first pole 23 in a manner of interference fit, so that the elastic pad 40 is in a compressed state. The elastic pad 40 can apply a pressure to the sleeving plate 312, and the pressure can achieve effective contact of the sleeving plate 312 with the second pole 24. The elastic pad 40 includes but is not limited to foam.

[0282] According to some embodiments of the present application, the periphery of the sleeving plate 312, where the second through hole 322 is formed, is provided with an elastic ring 70, and the sleeving plate 312 is sleeved on the plug-in portion 316 through the elastic ring 70.

[0283] Optionally, the elastic ring 70 is conductive, and can form an electrical connection between the periphery of the sleeving plate 312, where the second through hole 322 is formed, and the plug-in portion 316. The plug-in portion 316 penetrates the second through hole 322, and the elastic ring 70 is located between the periphery of the sleeving plate 312, where the second through hole 322 is formed, and the circumferential side surface of the plug-in portion 316.

[0284] The sleeving plate 312 is sleeved on the plug-in portion 316 through the elastic ring 70, and the elastic ring 70 can absorb certain vibrations, so that the effective contact of the sleeving plate 312 with the plug-in portion 316 can be maintained to a certain extent in the case that the battery monomer 20 or the electrical device is impacted by vibrations.

[0285] Please refer to FIG. 24, the elastic ring 70 can be provided between the periphery of the sleeving plate 312, where the second through hole 322 is formed, and the plug-in portion 316 in a circumferential direction of the plug-in portion 316 by 360 degrees, so that the contact area of the elastic ring 70 with the plug-in portion 316 can be large, and the elastic ring 70 can perform vibration reduction in all directions.

[0286] The elastic ring 70 includes but is not limited to a ring, a spring piece, a spring, etc. The ring can be a ring structure formed by connecting the first end and the tail end of a spiral spring.

[0287] According to some embodiments of the present application, the periphery of the sleeving plate 312, where the second through hole 322 is formed, is provided with a receiving groove, and at least a part of the elastic ring 70 is accommodated in the receiving groove.

[0288] At least a part of the elastic ring 70 is accommodated in the receiving groove, and when the elastic ring 70 is installed, the elastic ring 70 can be positioned through the receiving groove, so that the installation of the elastic ring 70 is facilitated. When the sleeving structure 321 and the plug-in portion 316 are assembled, the elastic ring 70 is also not easy to fall off from the sleeving structure 321.

[0289] Optionally, the shape of the receiving groove is matched with the shape of the elastic ring 70. For example, the cross section of the elastic ring 70 is circular, and the cross section of the receiving groove is circular arc, and the radius of the circular arc is the same as the radius of the circle.

[0290] According to some embodiments of the present application, the pole column 21 is arranged on the largest wall surface of the plurality of wall surfaces of the battery monomer 20.

[0291] The largest wall surface of the plurality of wall surfaces of the battery monomer 20 is the first wall surface 251. Optionally, please refer to FIG. 25, in some examples, the shell 25 is in the shape of a cuboid or a flat body, the shell 25 has six surfaces of front, back, left, right, top and bottom, the first direction is the front-back direction, and the first wall surface 251 forms the front surface and the back surface of the shell 25. The areas of the two first wall surfaces 251 are substantially the same, and are greater than the surface area of the shell 25 on any side of left, right, top and bottom.

[0292] Optionally, in an embodiment, for one battery monomer 20, two first wall surfaces 251 in the front-back (first direction) are respectively provided with one pole column 21, and the pole column 21 arranged on the front first wall surface 251 has opposite polarity to the pole column 21 arranged on the back first wall surface 251, so that in the front-back direction, two adjacent battery monomers 20 are connected in series through two pole columns 21. It can be understood that in other embodiments, two or more pole columns 21 of the same polarity can be arranged on the same first wall surface 251, and the number of pole columns 21 arranged on different wall surfaces is the same.

[0293] Optionally, in an embodiment, two first wall surfaces 251 in the front-back (first direction) are respectively provided with two pole columns 21, the two pole columns 21 arranged on the front first wall surface 251 are positive pole column 21 and negative pole column 21, and the two pole columns 21 arranged on the back first wall surface 251 are positive pole column 21 and negative pole column 21. The positive pole column 21 on the back first wall surface 251 of the front battery monomer 20 can be connected with the positive pole column 21 on the front first wall surface 251 of the rear battery monomer 20, and the negative pole column 21 on the back first wall surface 251 of the front battery monomer 20 can be connected with the negative pole column 21 on the front first wall surface 251 of the rear battery monomer 20, so that two adjacent battery monomers 20 are connected in parallel in the first direction.

[0294] It can be understood that the electrical connection mode of the battery monomer 20 can also include a hybrid connection, that is, a plurality of battery monomers 20 are connected in series and in parallel.

[0295] In the battery monomer 20 of the technical scheme of the present application, the pole column 21 is arranged on the largest wall surface of the plurality of wall surfaces of the battery monomer 20, so that the area of the pole column 21 can be increased, thereby increasing the overcurrent area of the electrical connection of the battery monomer 20 and ensuring the fast charging performance. At the same time, since the battery monomer 20 expands during use, the expansion force of the largest wall surface is greater than that of other wall surfaces, so that the insertion stability of the pole column 21 between the largest wall surfaces is better.

[0296] According to some embodiments of the present application, the battery cell 20 optionally includes a shell 25 and an electrode assembly 26 disposed within the shell 25; the pole 21 is disposed on the shell 25, and the tab 262 of the electrode assembly 26 is electrically connected to the pole 21.

[0297] The electrode assembly 26 is disposed such that the end of the tab 262 and the shell 25 form a gap, and the tab 262 is disposed in the gap; the pole 21 is disposed on the shell 25 opposite the gap.

[0298] Optionally, referring to FIG. 25, the electrode assembly 26 includes a main body 261, and the tab 262 is disposed on the upper end of the main body 261; the pole 21 is disposed on the first wall surface 251, which is the largest wall surface of the shell 25. The tab 262 can be directly electrically connected to the pole 21, or can be electrically connected to the pole 21 through a connecting piece.

[0299] The electrode assembly 26 is a component in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 26 can be contained in the shell 25. The electrode assembly 26 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually disposed between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet each have a portion with active material constituting the main body 261 of the electrode assembly 26, and each have a portion without active material constituting the tab 262. The positive electrode tab and the negative electrode tab can be located together at one end of the main body 261 or can be located at two ends of the main body 261, respectively. During charging and discharging, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab 262 is connected to the pole 21 to form a current loop.

[0300] The shell 25 forms a receiving space, and the electrode assembly 26 is accommodated in the receiving space. The electrode assembly 26 is disposed such that the end of the tab 262 and the shell 25 form a gap, that is, the end of the main body and the shell form a gap. On the one hand, this can enable the electrolyte to fully soak the electrode assembly to some extent, and on the other hand, the gap can provide space for connecting the tab 262 to the pole 21 or the connecting piece.

[0301] The pole 21 is disposed on the shell 25 opposite the gap, and when the battery cell 20 is in operation, the main body 261 of the electrode assembly 26 will expand, and the expanded main body 261 can move the pole 21 disposed on the shell 25. If the pole 21 is disposed opposite the main body 261, the main body 261 can move synchronously with the pole 21 to a first displacement that is relatively large when the main body 261 expands. By disposing the pole 21 on the shell 25 opposite the gap, even if the main body 261 moves due to expansion, the second displacement (which is smaller) of the main body 261 moving the pole 21 will be smaller than the first displacement, so that the displacement of the pole 21 is smaller, which to some extent avoids the pole 21 being disconnected from the tab 262 due to a large displacement of the pole 21.

[0302] According to some embodiments of the present application, the battery monomer 20 optionally comprises a shell 25 and an electrode assembly 26, the electrode assembly 26 is arranged in the shell 25, and the shell 25 is provided with a mounting hole;

[0303] The pole 21 is entirely covered outside the mounting hole, or a part of the pole 21 is covered outside the mounting hole, and the other part of the pole 21 penetrates into the shell 25 through the mounting hole and cooperates with the shell 25, and the pole 21 is electrically connected with the electrode assembly 26.

[0304] Specifically, the shape of the mounting hole (not shown in the figure) can match the cross-sectional shape of the pole 21, for example, the pole 21 is in the shape of a long strip racetrack, and the mounting hole (not shown in the figure) is also in the shape of a long strip racetrack with a size close to or the same as that of the pole 21. When the pole 21 is entirely covered outside the mounting hole (not shown in the figure), the pole 21 is entirely located outside the shell 25.

[0305] When a part of the pole 21 is covered outside the mounting hole (not shown in the figure), the part of the pole 21 penetrating into the mounting hole (not shown in the figure) can be buckled with the shell 25 and connected with the electrode assembly 26.

[0306] When the pole 21 is entirely covered outside the mounting hole (not shown in the figure), the assembly of the pole 21 and the shell 25 is facilitated, the manufacturing process is simplified, the reliability and stability of the connection between the pole 21 and the shell 25 are improved, and the pole 21 and the shell 25 are not easily separated from each other or cracked or damaged due to vibration or external pulling after the cooperation between the pole 21 and the shell 25 during the charging and discharging process of the battery monomer 20.

[0307] When a part of the pole 21 is covered outside the mounting hole (not shown in the figure) and the other part penetrates into the shell 25 through the mounting hole (not shown in the figure) and cooperates with the shell 25, the electrical connection stability and overcurrent capacity of the assembly pole 21 and the electrode assembly 26 in the shell 25 are improved.

[0308] According to some embodiments of the present application, the battery monomer 20 optionally comprises a shell 25 and an electrode assembly 26, the shell 25 comprises a shell body 252 and a cover 253, the shell body has an opening 2521, and the cover 253 is sealedly covered on the opening 2521; the pole 21 is arranged in any one of the shell body 252 and the cover 253; the electrode assembly 26 is arranged in the shell 25 and electrically connected with the pole 21.

[0309] Specifically, the cover 253 can be covered on the opening 2521 of the shell body 252 to isolate the internal environment of the battery monomer 20 from the external environment. Without limitation, the shape of the cover 253 can be adapted to the shape of the shell body 252 to fit the shell body 252. Alternatively, the cover 253 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the cover 253 is not easy to deform when subjected to extrusion collision, so that the battery monomer 20 can have higher structural strength, and the safety performance can also be improved.

[0310] The pole 21 is arranged in any one of the shell body 252 and the cover 253, and the pole 21 is electrically connected with the electrode assembly 26 for outputting or inputting the electric energy of the battery monomer 20. The material of the cover 253 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the present application embodiment does not make special limitation. In some embodiments, an insulating piece can also be arranged on the inner side of the cover 253, which can be used to isolate the electrically connected components in the shell body 252 from the cover 253 to reduce the risk of short circuit. Exemplarily, the insulating piece can be plastic, rubber, etc.

[0311] It should be noted that in the embodiment in which the pressure relief mechanism 254 is arranged on the cover 253, the pole 21 is arranged only on the shell body 252. In the embodiment in which the pressure relief mechanism 254 is arranged on the shell body 252, the pole 21 is arranged on the cover 253, or on the side of the shell body 252 different from the pressure relief mechanism 254.

[0312] The shell body 252 and the cover 253 can be independent components, and the opening 2521 can be arranged on the shell body 252, and the cover 253 is covered on the opening 2521 to form the internal environment of the battery monomer 20. Without limitation, the cover 253 and the shell body 252 can also be integrated, specifically, the cover 253 and the shell body 252 can form a common connecting surface before other components enter the shell. When it is necessary to encapsulate the inside of the shell body 252, the cover 253 is covered on the shell body 252.

[0313] In the above embodiment, the shell body 252 has the opening 2521, and the cover 253 seals the opening 2521; the pole 21 is arranged in any one of the shell body 252 and the cover 253, which is convenient for the assembly and production of the shell body 25 and the electrode assembly 26.

[0314] Optionally, referring to FIG. 26 and FIG. 27, the shell 25 is formed with a receiving groove 257 on one surface of the battery cell 20 along the first direction (e.g., the rear surface in FIG. 27), i.e., the rear first wall surface 251. The receiving groove 257 is recessed towards the inside of the battery cell 20 relative to the surface of the battery cell 20 on which the receiving groove 257 is located. The receiving groove 257 is used to accommodate the pole 21. The first pole 23 and the second pole 24 of two battery cells 20 adjacent along the first direction are inserted into the receiving groove 257. The receiving groove 257 can be located at the end of the shell 251. For example, the first wall surface 251 is rectangular, and the receiving groove 257 is formed at the corner of the rear first wall surface 251.

[0315] In combination with FIG. 2, the receiving groove 257 is recessed on the surface of the battery cell 20 and used to accommodate the pole 21. Thus, when two adjacent battery cells 20 are connected, the first pole 23, the second pole 24, and the sampling member 30 can be accommodated in the receiving groove 257, and the distance between the two adjacent battery cells 20 along the first direction can be shortened. This is conducive to arranging more battery cells 20 in the limited volume space of the battery device 100 and improving the energy density of the battery device 100.

[0316] Optionally, referring to FIG. 26 and FIG. 27, the battery cell 20 is generally flat and rectangular cuboid-shaped. The length dimension of the battery cell 20 is much greater than the width dimension and the thickness dimension of the battery cell 20. The pole 21 can extend along the width direction of the battery cell 20 and be arranged close to the end along the length direction of the battery cell 20. In this embodiment, the length dimension of the pole 21 is relatively small, and the pole 21 is short and flat.

[0317] In combination with FIG. 2, according to some embodiments of the present application, the battery device 100 further includes a box body 10, a first expansion beam 13, and a second expansion beam 14. The first expansion beam 13 and the second expansion beam 14 are arranged at intervals and jointly define a battery compartment 15 with the box body 10. A plurality of battery cells 20 are arranged in the battery compartment 15 in sequence, and the battery cells 20 at the ends are respectively matched with the first expansion beam 13 and the second expansion beam 14.

[0318] In the above embodiments, the battery cells 20 are constrained by the expansion beams, so that the battery cells 20 can be directly arranged in the battery device 100 to form a battery pack, thereby ensuring the energy density and reliability of the battery device 100.

[0319] Specifically, the battery device 100 of the present embodiment can form a CTP (Cell To Pack) scheme. The battery device 100 of the CTP scheme of the present embodiment can reduce the structural members required for fixing the battery modules, improve the space utilization in the case 10, and thus increase the number of battery cells 20 in the case 10 in the case of the same size of the case 10, thereby increasing the energy density of the battery device 100, as compared with the battery device 100 of the MTP (Module To Pack) scheme.

[0320] Optionally, in FIG. 2, the first expansion beam 13 and the second expansion beam 14 are arranged to be spaced apart and together with the case 10 to form two battery compartments 15. A plurality of battery cells 20 are connected to form a row of battery groups in the first direction (e.g., the front-to-back direction in FIG. 2), and two rows of battery groups are arranged in the second direction (e.g., the left-to-right direction in FIG. 2) in the two battery compartments 15, respectively. It can be understood that in other embodiments, the number of rows of battery groups includes but is not limited to one row or more than two rows.

[0321] The first expansion beam 13 and the second expansion beam 14 can be arranged at the two ends of the battery groups in the first direction. In FIG. 2, the first expansion beam 13 and the second expansion beam 14 are arranged at the front end and the rear end of a row of battery groups, respectively. The battery cells 20 at the front end of the battery groups are matched with the first expansion beam 13, and the battery cells 20 at the rear end of the battery groups are matched with the second expansion beam 14, so that the first expansion beam 13 and the second expansion beam 14 bind a row of battery groups in the front-to-back direction (the first direction).

[0322] Optionally, in FIG. 2, the first expansion beam 13 is matched with the largest wall surface of the casing of the battery cell 20 at the front end, and the second expansion beam 14 is matched with the largest wall surface of the casing of the battery cell 20 at the rear end. During the operation of the battery cell 20, as the electrode assembly releases gas, the expansion amount of the largest wall surface of the casing is greater than that of other wall surfaces of the casing. By matching the first expansion beam 13 and the second expansion beam 14 with the largest wall surface of the casing of the battery cell 20 at the end, respectively, the largest wall surface of the casing can be prevented from being cracked to a certain extent due to the excessive expansion amount, thereby improving the safety of the battery device 100.

[0323] Optionally, the battery device 100 further comprises a cross beam 16 connecting two side plates (e.g. left and right side plates) of the box 10 along the second direction, and a longitudinal beam 17 connecting the first expansion beam 13 and the second expansion beam 14 arranged along the first direction, and the cross beam 16 connects the longitudinal beam 17, so as to improve the structural strength of the box 10. The number of the cross beam 16 and the longitudinal beam 17 is not limited in the present application. In FIG. 2, the number of the cross beam 16 and the longitudinal beam 17 is one, and one cross beam 16 and one longitudinal beam 17 are connected, so as to improve the structural strength of the box 10.

[0324] In the above embodiment, the battery cells 20 at the end are matched with the first expansion beam 13 and the second expansion beam 14 respectively, so that the first expansion beam 13 and the second expansion beam 14 can bind the battery cells 20 when the battery cells 20 expand, and the battery cells 20 can be fixed in the box 10, avoiding the problem of disconnection of the electrical connection caused by displacement of the battery cells 20, and ensuring the reliability of the battery device 100.

[0325] According to some embodiments of the present application, the battery device 100 further comprises the box 10, a module shell (not shown in the figure) and a mounting beam (not shown in the figure), and the plurality of battery cells 20 are arranged in the module shell, and the module shell is mounted in the box 10 through the mounting beam.

[0326] In the above embodiment, the battery cells 20 are constrained by the module shell, and then the battery device 100 is formed, so as to improve the reliability of the battery device 100.

[0327] Specifically, the battery device 100 of the present embodiment can form a MTP (Module To Pack) scheme.

[0328] Optionally, the plurality of battery cells 20 are arranged in one module shell, so as to form one battery module, and one or more battery modules can be placed in the box 10. The plurality of battery modules can be connected in series, connected in parallel or connected in a hybrid manner. The plurality of battery cells 20 in one module shell can be connected in series, connected in parallel or connected in a hybrid manner.

[0329] The mounting beam can be fixed in the box 10 and connected with the module shell, so as to fix the battery module in the box 10. The fixing mode can include but is not limited to welding, bolt connection and the like.

[0330] Optionally, in one embodiment, the module shell can have a frame structure, such as a square frame structure. The plurality of battery cells 20 are arranged in the space defined by the frame structure. Optionally, in one embodiment, the module shell can comprise a strap (e.g. steel strap), and the strap can bundle and fix the plurality of battery cells 20.

[0331] The module shell is installed in the box 10 through the mounting beam, so that a plurality of battery monomers 20 can be assembled and fixed into a battery module, and the battery module is fixed in the box 10 through the mounting beam, so that the battery monomers 20 can be fixed in the box 10, the problem of disconnection of the electrical connection caused by displacement of the battery monomers 20 is avoided, and the reliability of the battery device 100 can be ensured.

[0332] According to some embodiments of the present application, the battery device 100 also includes a pressure relief mechanism 254, and the pressure relief mechanism 254 and the pole 21 are arranged on different two surfaces of the battery monomer 20.

[0333] In the above embodiment, when the internal pressure of the battery monomer 20 exceeds the threshold value, the pressure relief mechanism 254 is broken before other walls of the shell 25, and the internal pressure is released. Since the pressure relief mechanism 254 and the pole 21 are arranged on different two surfaces of the battery monomer 20, the high-temperature medium sprayed by the pressure relief mechanism 254 is not easy to damage the pole 21, and is not easy to act on the electrical connection position of other components outside the shell 25, so that the reliability of the battery device 100 can be improved.

[0334] Specifically, in one embodiment, the pole 21 is arranged on the first wall surface 251 which is the largest wall surface of the shell 25. The pressure relief mechanism 254 is arranged on the surface of the shell 25 which is different from the first wall surface 251. Optionally, the pressure relief mechanism 254 forms a local wall thickness which is relatively shallow with respect to the overall wall thickness on the shell 25 outside the first wall surface 251 through notches, grooves, etc. As shown in FIG. 25, the pressure relief mechanism 254 is arranged on the bottom surface of the battery monomer 20.

[0335] Optionally, the first wall surface 251 is located on the front and rear sides of the battery monomer 20, and the pressure relief mechanism 254 can be arranged on one of the left, right, upper and lower wall surfaces of the shell 25.

[0336] During use, the electrode assembly 26 of the battery monomer 20 releases gas. When the internal pressure of the battery monomer 20 exceeds the threshold value, the pressure relief mechanism 254 is broken before other walls of the shell 25, and the internal pressure is released. After the internal pressure is released, the high-temperature medium in the battery monomer 20 is sprayed out from the pressure relief mechanism 254. Since the pressure relief mechanism 254 and the pole 21 are arranged on different two surfaces of the battery monomer 20, the high-temperature medium sprayed by the pressure relief mechanism 254 is not easy to be sprayed onto the pole 21 to damage the pole 21, and is not easy to be sprayed to the electrical connection position of the pole 21 and other components outside the shell 25, so that the reliability of the battery device 100 can be improved.

[0337] In the above embodiments, the pressure relief mechanism 254 and the pole 21 are arranged on two different surfaces of the battery monomer 20, respectively. When the internal pressure of the battery monomer 20 exceeds the threshold value, the pressure relief mechanism 254 is cracked before other walls of the shell 25, and the internal pressure is released, thereby avoiding the risk of cracking of the wall 251 provided with the pole when the internal pressure of the battery monomer 20 is too large, reducing the influence of the internal pressure of the battery monomer 20 on the pole 21, and further reducing the safety risk.

[0338] According to some embodiments of the present application, optionally, the pressure relief mechanism 254 is arranged on the bottom surface of the battery monomer 20.

[0339] Optionally, in an embodiment, the battery device 100 can be applied to a vehicle. Specifically, the pressure relief mechanism 254 is arranged on the bottom surface of the battery monomer 20, so that the pressure relief mechanism 254 of the battery monomer 20 faces downward. When the battery monomer 20 is in thermal runaway, the substances in the battery monomer 20 can be sprayed to the bottom of the vehicle, thereby reducing the risk of the passenger compartment to a certain extent.

[0340] According to some embodiments of the present application, the embodiments of the present application provide a power utilization device, which comprises the battery device 100 of any of the above embodiments, and the battery device 100 is used to provide electric energy.

[0341] The power utilization device can be a device or system of any of the above applications of the battery device 100.

[0342] According to some embodiments of the present application, optionally, the power utilization device is a vehicle, and the battery device 100 comprises a box 10, and a plurality of battery monomers 20 are arranged in the box 10; at least part of the chassis of the vehicle constitutes the upper cover of the box 10.

[0343] In the above embodiments, at least part of the chassis of the vehicle constitutes the upper cover of the box 10, which can reduce the space occupied by the battery device 100 in the vehicle, thereby increasing the passenger space of the vehicle.

[0344] Specifically, the battery device of the present embodiment can form a CTB (Cell To Body) scheme.

[0345] Optionally, in an embodiment, please refer to FIG. 2, the first part 11 can serve as the upper cover of the box 10, and the first part 11 can constitute the chassis of the vehicle. In an embodiment, the first part 11 can be covered on the opening side of the second part 12, so that the first part 11 and the second part 12 jointly define a closed space. Optionally, in an embodiment, the first part 11 and the second part 12 can also be hollow structures with one side open, and the opening side of the first part 11 is covered on the opening side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0346] Optionally, in one embodiment, the chassis of the vehicle can be formed with a notch, the battery device 100 is installed into the notch with the first part 11 facing the direction of the chassis of the vehicle, so that the battery device 100 is assembled to the vehicle, and the first part 11 constitutes a part of the chassis of the vehicle.

[0347] Since at least a part of the chassis of the vehicle constitutes the upper cover of the box 10, the part of the chassis of the vehicle and the upper cover of the box 10 can share a space of the vehicle, without the need to set two spaces respectively for placing the part of the chassis of the vehicle and the upper cover of the box 10, thereby reducing the space of the vehicle occupied by the battery device 100 and increasing the passenger space of the vehicle.

[0348] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The application relates to a battery pack, comprising: a plurality of battery cells arranged along a first direction, the battery cells comprising a pole, in the first direction, two pole of the battery cells electrically connected are respectively a first pole and a second pole; a sampling member directly contacting the first pole and / or the second pole to collect parameter information of the corresponding battery cell.

2. The battery device according to claim 1, characterized by The contact mode of the sampling member and the pole comprises at least one of the following: the sampling member directly contacts at least one of the first pole and the second pole in the axial direction of the pole; the sampling member directly contacts at least one of the first pole and the second pole in the circumferential direction of the pole; the sampling member directly contacts at least one of the first pole and the second pole in the radial direction of the pole.

3. The battery device of claim 1, wherein The first pole is provided with a first groove, a part of the second pole extends into the first groove and is electrically connected with the first pole; the sampling member is abutted and matched between the first pole and the second pole.

4. The battery device of claim 3, wherein The sampling member is sleeved outside the second pole, and two side surfaces of the sampling member are respectively abutted with the first pole and the second pole.

5. The battery device of claim 4, wherein, The second pole comprises a pole body and a limiting protrusion protruding from the circumferential side surface of the pole body; the pole body extends into the first groove and is electrically connected with the first pole, the sampling member is sleeved outside the pole body, and one side surface of the sampling member is abutted with the limiting protrusion, and the other side surface of the sampling member is abutted with the wall body of the first pole at the slot opening of the first groove.

6. The battery device of claim 4, wherein The sampling member comprises a connecting part and a sleeving part, the sleeving part is connected to the connecting part, the sleeving part is sleeved outside the second pole, and two side surfaces of the sleeving part are respectively abutted with the first pole and the second pole; the connecting part is connected with an output line of sampling.

7. The battery device of claim 4, wherein The sleeving part comprises a sleeving plate, the sleeving plate is provided with a first through hole, and the sleeving plate is sleeved on the second pole through the first through hole.

8. The battery device of claim 7, wherein, An end of the sleeving plate away from the connecting part is also provided with a first extension hole, and the first extension hole extends from the edge of the sleeving plate to the first through hole.

9. The battery device of claim 8, wherein, The size of the first extension hole is smaller than that of the first through hole.

10. The battery device of claim 8, wherein, An end of the sleeving plate close to the connecting part is also provided with a second extension hole, and the second extension hole extends from the connecting part to the first through hole.

11. The battery device of claim 7, wherein, The number of the sleeving plates is two, and the two sleeving plates are arranged at intervals on the connecting part, one of the two sleeving plates is abutted with the second pole, and the other of the two sleeving plates is abutted with the first pole.

12. The battery device of claim 7, wherein, The sleeving part further comprises an elastic pad arranged on one side of the sleeving plate, the elastic pad is provided with a through hole matched with the first through hole, the sleeving plate and the elastic pad are sleeved on the second pole through the first through hole and the through hole, the elastic pad is abutted with the first pole, and the side of the sleeving part away from the elastic pad is abutted with the second pole.

13. The battery device of claim 7, wherein, The periphery of the first through hole of the sleeve plate is provided with an elastic ring, and the sleeve plate is sleeved on the second pole column through the elastic ring.

14. The battery device of claim 13, wherein, The periphery of the first through hole of the sleeve plate is provided with a receiving groove, and at least a part of the elastic ring is received in the receiving groove.

15. The battery device of claim 1, wherein, The sampling member is inserted into the first pole column and the second pole column to electrically connect the first pole column and the second pole column.

16. The battery device according to claim 15, wherein, the first pole column is provided with a second groove, the second pole column is provided with a third groove, the sampling member comprises an insertion part and a sampling part, two ends of the insertion part are respectively inserted into the second groove and the third groove, and the sampling part is connected with the insertion part and is used for sampling; or, the sampling member comprises an insertion part and a sampling part, the insertion part is provided with a fourth groove and a fifth groove, the first pole column and the second pole column are respectively inserted into the fourth groove and the fifth groove, and the sampling part is connected with the insertion part and is used for sampling.

17. The battery device according to claim 16, wherein, the sampling part is integrally formed with the insertion part.

18. The battery device according to claim 16, wherein, the sampling part is sleeved outside the insertion part, and two side surfaces of the sampling part respectively abut against the first pole column and the second pole column.

19. The battery device according to claim 18, wherein, the sampling part comprises a connecting structure and a sleeving structure, the sleeving structure cooperates with the connecting structure, the sleeving structure is sleeved outside the insertion part, two side surfaces of the sleeving structure respectively abut against the first pole column and the second pole column, and the connecting structure is connected with an output line of sampling.

20. The battery device according to claim 19, wherein, the sleeving structure comprises a sleeve plate, a second through hole is formed in the sleeve plate, and the sleeve plate is sleeved on the insertion part through the second through hole.

21. The battery device of claim 20, wherein, an end of the sleeve plate away from the connecting part is further provided with a first extension hole, the first extension hole extends from an edge of the sleeve plate to communicate with the second through hole.

22. The battery device of claim 21, wherein, the size of the first extension hole is smaller than the size of the second through hole.

23. The battery device of claim 21, wherein, an end of the sleeve plate close to the connecting structure is further provided with a second extension hole, the second extension hole extends from the connecting structure to communicate with the second through hole.

24. The battery device of claim 20, wherein, the number of the sleeve plates is two, and the two sleeve plates are spaced apart from each other and arranged on the connecting structure, one of the two sleeve plates abuts against the second pole column, and the other of the two sleeve plates abuts against the first pole column.

25. The battery device of claim 20, wherein, the sleeving structure further comprises an elastic pad arranged on one side of the sleeve plate, the elastic pad is provided with a through hole matched with the second through hole, the sleeve plate and the elastic pad are sleeved on the insertion part through the second through hole and the through hole, the elastic pad abuts against the first pole column, and the side of the sleeve part away from the elastic pad abuts against the second pole column.

26. The battery device of claim 20, wherein, the periphery of the second through hole of the sleeve plate is provided with an elastic ring, and the sleeve plate is sleeved on the insertion part through the elastic ring.

27. The battery device of claim 26, wherein, The periphery of the second through hole of the sleeve plate is provided with a receiving groove, and at least a part of the elastic ring is accommodated in the receiving groove.

28. The battery device of any one of claims 1-24, wherein, The pole post is arranged on the wall surface with the largest area among the plurality of wall surfaces of the battery monomer in the circumferential direction.

29. The battery device of claim 28, wherein, The battery monomer comprises a shell and an electrode assembly arranged in the shell; the pole post is arranged on the shell, and the tab of the electrode assembly is electrically connected with the pole post. The electrode assembly forms a gap between the end of the tab and the shell, and the tab is arranged in the gap; the pole post is arranged at a position opposite to the gap on the shell.

30. The battery device of any one of claims 1-27, wherein, The battery monomer comprises a shell and an electrode assembly arranged in the shell, and the shell is provided with a mounting hole; The pole post is arranged on the shell, and the tab of the electrode assembly is electrically connected with the pole post.

31. The battery device according to any one of claims 1 to 27, The battery monomer comprises a shell and an electrode assembly arranged in the shell, and the shell comprises a shell body and a cover body, the shell body is provided with an opening, and the cover body is arranged on the opening; the pole post is arranged on any one of the shell body and the cover body; the electrode assembly is arranged in the shell and is electrically connected with the pole post. The battery device further comprises a box body, a first expansion beam and a second expansion beam; the first expansion beam and the second expansion beam are arranged at intervals and jointly form a battery compartment with the box body, and a plurality of battery monomers are arranged in the battery compartment in sequence, and the battery monomers at the ends are respectively matched with the first expansion beam and the second expansion beam.

32. The battery device of any one of claims 1-27, wherein, Alternatively, The battery device further comprises a box body, a module shell and a mounting beam, the plurality of battery monomers are arranged in the module shell, and the module shell is mounted in the box body through the mounting beam. The battery device further comprises a pressure relief mechanism, and the pressure relief mechanism and the pole post are arranged on different two surfaces of the battery monomer respectively.

33. The battery device of any one of claims 1-27, wherein, The pressure relief mechanism is arranged on the bottom surface of the battery monomer.

34. The battery device of claim 33, wherein, The battery device comprises the battery device of any one of claims 1 to 34, and the battery device is used for providing electric energy.

35. An electrical device, comprising: The electric device is a vehicle, the battery device comprises a box body, and the plurality of battery monomers are arranged in the box body; at least a part of the chassis of the vehicle constitutes an upper cover of the box body.

36. The powered device of claim 35, wherein, The battery device comprises the battery device of any one of claims 1 to 34, and the battery device is used for providing electric energy. The electric device is a vehicle, the battery device comprises a box body, and the plurality of battery monomers are arranged in the box body; at least a part of the chassis of the vehicle constitutes an upper cover of the box body.

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